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-rw-r--r--fs/ufs/Kconfig43
-rw-r--r--fs/ufs/Makefile9
-rw-r--r--fs/ufs/balloc.c938
-rw-r--r--fs/ufs/cylinder.c201
-rw-r--r--fs/ufs/dir.c662
-rw-r--r--fs/ufs/file.c44
-rw-r--r--fs/ufs/ialloc.c353
-rw-r--r--fs/ufs/inode.c910
-rw-r--r--fs/ufs/namei.c356
-rw-r--r--fs/ufs/super.c1524
-rw-r--r--fs/ufs/swab.h115
-rw-r--r--fs/ufs/symlink.c53
-rw-r--r--fs/ufs/truncate.c523
-rw-r--r--fs/ufs/ufs.h176
-rw-r--r--fs/ufs/ufs_fs.h960
-rw-r--r--fs/ufs/util.c282
-rw-r--r--fs/ufs/util.h592
17 files changed, 7741 insertions, 0 deletions
diff --git a/fs/ufs/Kconfig b/fs/ufs/Kconfig
new file mode 100644
index 000000000..0bf6e16f8
--- /dev/null
+++ b/fs/ufs/Kconfig
@@ -0,0 +1,43 @@
+config UFS_FS
+ tristate "UFS file system support (read only)"
+ depends on BLOCK
+ help
+ BSD and derivate versions of Unix (such as SunOS, FreeBSD, NetBSD,
+ OpenBSD and NeXTstep) use a file system called UFS. Some System V
+ Unixes can create and mount hard disk partitions and diskettes using
+ this file system as well. Saying Y here will allow you to read from
+ these partitions; if you also want to write to them, say Y to the
+ experimental "UFS file system write support", below. Please read the
+ file <file:Documentation/filesystems/ufs.txt> for more information.
+
+ The recently released UFS2 variant (used in FreeBSD 5.x) is
+ READ-ONLY supported.
+
+ Note that this option is generally not needed for floppies, since a
+ good portable way to transport files and directories between unixes
+ (and even other operating systems) is given by the tar program ("man
+ tar" or preferably "info tar").
+
+ When accessing NeXTstep files, you may need to convert them from the
+ NeXT character set to the Latin1 character set; use the program
+ recode ("info recode") for this purpose.
+
+ To compile the UFS file system support as a module, choose M here: the
+ module will be called ufs.
+
+ If you haven't heard about all of this before, it's safe to say N.
+
+config UFS_FS_WRITE
+ bool "UFS file system write support (DANGEROUS)"
+ depends on UFS_FS
+ help
+ Say Y here if you want to try writing to UFS partitions. This is
+ experimental, so you should back up your UFS partitions beforehand.
+
+config UFS_DEBUG
+ bool "UFS debugging"
+ depends on UFS_FS
+ help
+ If you are experiencing any problems with the UFS filesystem, say
+ Y here. This will result in _many_ additional debugging messages to be
+ written to the system log.
diff --git a/fs/ufs/Makefile b/fs/ufs/Makefile
new file mode 100644
index 000000000..4d0e02b02
--- /dev/null
+++ b/fs/ufs/Makefile
@@ -0,0 +1,9 @@
+#
+# Makefile for the Linux ufs filesystem routines.
+#
+
+obj-$(CONFIG_UFS_FS) += ufs.o
+
+ufs-objs := balloc.o cylinder.o dir.o file.o ialloc.o inode.o \
+ namei.o super.o symlink.o truncate.o util.o
+ccflags-$(CONFIG_UFS_DEBUG) += -DDEBUG
diff --git a/fs/ufs/balloc.c b/fs/ufs/balloc.c
new file mode 100644
index 000000000..a7106eda5
--- /dev/null
+++ b/fs/ufs/balloc.c
@@ -0,0 +1,938 @@
+/*
+ * linux/fs/ufs/balloc.c
+ *
+ * Copyright (C) 1998
+ * Daniel Pirkl <daniel.pirkl@email.cz>
+ * Charles University, Faculty of Mathematics and Physics
+ *
+ * UFS2 write support Evgeniy Dushistov <dushistov@mail.ru>, 2007
+ */
+
+#include <linux/fs.h>
+#include <linux/stat.h>
+#include <linux/time.h>
+#include <linux/string.h>
+#include <linux/buffer_head.h>
+#include <linux/capability.h>
+#include <linux/bitops.h>
+#include <asm/byteorder.h>
+
+#include "ufs_fs.h"
+#include "ufs.h"
+#include "swab.h"
+#include "util.h"
+
+#define INVBLOCK ((u64)-1L)
+
+static u64 ufs_add_fragments(struct inode *, u64, unsigned, unsigned);
+static u64 ufs_alloc_fragments(struct inode *, unsigned, u64, unsigned, int *);
+static u64 ufs_alloccg_block(struct inode *, struct ufs_cg_private_info *, u64, int *);
+static u64 ufs_bitmap_search (struct super_block *, struct ufs_cg_private_info *, u64, unsigned);
+static unsigned char ufs_fragtable_8fpb[], ufs_fragtable_other[];
+static void ufs_clusteracct(struct super_block *, struct ufs_cg_private_info *, unsigned, int);
+
+/*
+ * Free 'count' fragments from fragment number 'fragment'
+ */
+void ufs_free_fragments(struct inode *inode, u64 fragment, unsigned count)
+{
+ struct super_block * sb;
+ struct ufs_sb_private_info * uspi;
+ struct ufs_cg_private_info * ucpi;
+ struct ufs_cylinder_group * ucg;
+ unsigned cgno, bit, end_bit, bbase, blkmap, i;
+ u64 blkno;
+
+ sb = inode->i_sb;
+ uspi = UFS_SB(sb)->s_uspi;
+
+ UFSD("ENTER, fragment %llu, count %u\n",
+ (unsigned long long)fragment, count);
+
+ if (ufs_fragnum(fragment) + count > uspi->s_fpg)
+ ufs_error (sb, "ufs_free_fragments", "internal error");
+
+ mutex_lock(&UFS_SB(sb)->s_lock);
+
+ cgno = ufs_dtog(uspi, fragment);
+ bit = ufs_dtogd(uspi, fragment);
+ if (cgno >= uspi->s_ncg) {
+ ufs_panic (sb, "ufs_free_fragments", "freeing blocks are outside device");
+ goto failed;
+ }
+
+ ucpi = ufs_load_cylinder (sb, cgno);
+ if (!ucpi)
+ goto failed;
+ ucg = ubh_get_ucg (UCPI_UBH(ucpi));
+ if (!ufs_cg_chkmagic(sb, ucg)) {
+ ufs_panic (sb, "ufs_free_fragments", "internal error, bad magic number on cg %u", cgno);
+ goto failed;
+ }
+
+ end_bit = bit + count;
+ bbase = ufs_blknum (bit);
+ blkmap = ubh_blkmap (UCPI_UBH(ucpi), ucpi->c_freeoff, bbase);
+ ufs_fragacct (sb, blkmap, ucg->cg_frsum, -1);
+ for (i = bit; i < end_bit; i++) {
+ if (ubh_isclr (UCPI_UBH(ucpi), ucpi->c_freeoff, i))
+ ubh_setbit (UCPI_UBH(ucpi), ucpi->c_freeoff, i);
+ else
+ ufs_error (sb, "ufs_free_fragments",
+ "bit already cleared for fragment %u", i);
+ }
+
+ fs32_add(sb, &ucg->cg_cs.cs_nffree, count);
+ uspi->cs_total.cs_nffree += count;
+ fs32_add(sb, &UFS_SB(sb)->fs_cs(cgno).cs_nffree, count);
+ blkmap = ubh_blkmap (UCPI_UBH(ucpi), ucpi->c_freeoff, bbase);
+ ufs_fragacct(sb, blkmap, ucg->cg_frsum, 1);
+
+ /*
+ * Trying to reassemble free fragments into block
+ */
+ blkno = ufs_fragstoblks (bbase);
+ if (ubh_isblockset(UCPI_UBH(ucpi), ucpi->c_freeoff, blkno)) {
+ fs32_sub(sb, &ucg->cg_cs.cs_nffree, uspi->s_fpb);
+ uspi->cs_total.cs_nffree -= uspi->s_fpb;
+ fs32_sub(sb, &UFS_SB(sb)->fs_cs(cgno).cs_nffree, uspi->s_fpb);
+ if ((UFS_SB(sb)->s_flags & UFS_CG_MASK) == UFS_CG_44BSD)
+ ufs_clusteracct (sb, ucpi, blkno, 1);
+ fs32_add(sb, &ucg->cg_cs.cs_nbfree, 1);
+ uspi->cs_total.cs_nbfree++;
+ fs32_add(sb, &UFS_SB(sb)->fs_cs(cgno).cs_nbfree, 1);
+ if (uspi->fs_magic != UFS2_MAGIC) {
+ unsigned cylno = ufs_cbtocylno (bbase);
+
+ fs16_add(sb, &ubh_cg_blks(ucpi, cylno,
+ ufs_cbtorpos(bbase)), 1);
+ fs32_add(sb, &ubh_cg_blktot(ucpi, cylno), 1);
+ }
+ }
+
+ ubh_mark_buffer_dirty (USPI_UBH(uspi));
+ ubh_mark_buffer_dirty (UCPI_UBH(ucpi));
+ if (sb->s_flags & MS_SYNCHRONOUS)
+ ubh_sync_block(UCPI_UBH(ucpi));
+ ufs_mark_sb_dirty(sb);
+
+ mutex_unlock(&UFS_SB(sb)->s_lock);
+ UFSD("EXIT\n");
+ return;
+
+failed:
+ mutex_unlock(&UFS_SB(sb)->s_lock);
+ UFSD("EXIT (FAILED)\n");
+ return;
+}
+
+/*
+ * Free 'count' fragments from fragment number 'fragment' (free whole blocks)
+ */
+void ufs_free_blocks(struct inode *inode, u64 fragment, unsigned count)
+{
+ struct super_block * sb;
+ struct ufs_sb_private_info * uspi;
+ struct ufs_cg_private_info * ucpi;
+ struct ufs_cylinder_group * ucg;
+ unsigned overflow, cgno, bit, end_bit, i;
+ u64 blkno;
+
+ sb = inode->i_sb;
+ uspi = UFS_SB(sb)->s_uspi;
+
+ UFSD("ENTER, fragment %llu, count %u\n",
+ (unsigned long long)fragment, count);
+
+ if ((fragment & uspi->s_fpbmask) || (count & uspi->s_fpbmask)) {
+ ufs_error (sb, "ufs_free_blocks", "internal error, "
+ "fragment %llu, count %u\n",
+ (unsigned long long)fragment, count);
+ goto failed;
+ }
+
+ mutex_lock(&UFS_SB(sb)->s_lock);
+
+do_more:
+ overflow = 0;
+ cgno = ufs_dtog(uspi, fragment);
+ bit = ufs_dtogd(uspi, fragment);
+ if (cgno >= uspi->s_ncg) {
+ ufs_panic (sb, "ufs_free_blocks", "freeing blocks are outside device");
+ goto failed_unlock;
+ }
+ end_bit = bit + count;
+ if (end_bit > uspi->s_fpg) {
+ overflow = bit + count - uspi->s_fpg;
+ count -= overflow;
+ end_bit -= overflow;
+ }
+
+ ucpi = ufs_load_cylinder (sb, cgno);
+ if (!ucpi)
+ goto failed_unlock;
+ ucg = ubh_get_ucg (UCPI_UBH(ucpi));
+ if (!ufs_cg_chkmagic(sb, ucg)) {
+ ufs_panic (sb, "ufs_free_blocks", "internal error, bad magic number on cg %u", cgno);
+ goto failed_unlock;
+ }
+
+ for (i = bit; i < end_bit; i += uspi->s_fpb) {
+ blkno = ufs_fragstoblks(i);
+ if (ubh_isblockset(UCPI_UBH(ucpi), ucpi->c_freeoff, blkno)) {
+ ufs_error(sb, "ufs_free_blocks", "freeing free fragment");
+ }
+ ubh_setblock(UCPI_UBH(ucpi), ucpi->c_freeoff, blkno);
+ if ((UFS_SB(sb)->s_flags & UFS_CG_MASK) == UFS_CG_44BSD)
+ ufs_clusteracct (sb, ucpi, blkno, 1);
+
+ fs32_add(sb, &ucg->cg_cs.cs_nbfree, 1);
+ uspi->cs_total.cs_nbfree++;
+ fs32_add(sb, &UFS_SB(sb)->fs_cs(cgno).cs_nbfree, 1);
+
+ if (uspi->fs_magic != UFS2_MAGIC) {
+ unsigned cylno = ufs_cbtocylno(i);
+
+ fs16_add(sb, &ubh_cg_blks(ucpi, cylno,
+ ufs_cbtorpos(i)), 1);
+ fs32_add(sb, &ubh_cg_blktot(ucpi, cylno), 1);
+ }
+ }
+
+ ubh_mark_buffer_dirty (USPI_UBH(uspi));
+ ubh_mark_buffer_dirty (UCPI_UBH(ucpi));
+ if (sb->s_flags & MS_SYNCHRONOUS)
+ ubh_sync_block(UCPI_UBH(ucpi));
+
+ if (overflow) {
+ fragment += count;
+ count = overflow;
+ goto do_more;
+ }
+
+ ufs_mark_sb_dirty(sb);
+ mutex_unlock(&UFS_SB(sb)->s_lock);
+ UFSD("EXIT\n");
+ return;
+
+failed_unlock:
+ mutex_unlock(&UFS_SB(sb)->s_lock);
+failed:
+ UFSD("EXIT (FAILED)\n");
+ return;
+}
+
+/*
+ * Modify inode page cache in such way:
+ * have - blocks with b_blocknr equal to oldb...oldb+count-1
+ * get - blocks with b_blocknr equal to newb...newb+count-1
+ * also we suppose that oldb...oldb+count-1 blocks
+ * situated at the end of file.
+ *
+ * We can come here from ufs_writepage or ufs_prepare_write,
+ * locked_page is argument of these functions, so we already lock it.
+ */
+static void ufs_change_blocknr(struct inode *inode, sector_t beg,
+ unsigned int count, sector_t oldb,
+ sector_t newb, struct page *locked_page)
+{
+ const unsigned blks_per_page =
+ 1 << (PAGE_CACHE_SHIFT - inode->i_blkbits);
+ const unsigned mask = blks_per_page - 1;
+ struct address_space * const mapping = inode->i_mapping;
+ pgoff_t index, cur_index, last_index;
+ unsigned pos, j, lblock;
+ sector_t end, i;
+ struct page *page;
+ struct buffer_head *head, *bh;
+
+ UFSD("ENTER, ino %lu, count %u, oldb %llu, newb %llu\n",
+ inode->i_ino, count,
+ (unsigned long long)oldb, (unsigned long long)newb);
+
+ BUG_ON(!locked_page);
+ BUG_ON(!PageLocked(locked_page));
+
+ cur_index = locked_page->index;
+ end = count + beg;
+ last_index = end >> (PAGE_CACHE_SHIFT - inode->i_blkbits);
+ for (i = beg; i < end; i = (i | mask) + 1) {
+ index = i >> (PAGE_CACHE_SHIFT - inode->i_blkbits);
+
+ if (likely(cur_index != index)) {
+ page = ufs_get_locked_page(mapping, index);
+ if (!page)/* it was truncated */
+ continue;
+ if (IS_ERR(page)) {/* or EIO */
+ ufs_error(inode->i_sb, __func__,
+ "read of page %llu failed\n",
+ (unsigned long long)index);
+ continue;
+ }
+ } else
+ page = locked_page;
+
+ head = page_buffers(page);
+ bh = head;
+ pos = i & mask;
+ for (j = 0; j < pos; ++j)
+ bh = bh->b_this_page;
+
+
+ if (unlikely(index == last_index))
+ lblock = end & mask;
+ else
+ lblock = blks_per_page;
+
+ do {
+ if (j >= lblock)
+ break;
+ pos = (i - beg) + j;
+
+ if (!buffer_mapped(bh))
+ map_bh(bh, inode->i_sb, oldb + pos);
+ if (!buffer_uptodate(bh)) {
+ ll_rw_block(READ, 1, &bh);
+ wait_on_buffer(bh);
+ if (!buffer_uptodate(bh)) {
+ ufs_error(inode->i_sb, __func__,
+ "read of block failed\n");
+ break;
+ }
+ }
+
+ UFSD(" change from %llu to %llu, pos %u\n",
+ (unsigned long long)(pos + oldb),
+ (unsigned long long)(pos + newb), pos);
+
+ bh->b_blocknr = newb + pos;
+ unmap_underlying_metadata(bh->b_bdev,
+ bh->b_blocknr);
+ mark_buffer_dirty(bh);
+ ++j;
+ bh = bh->b_this_page;
+ } while (bh != head);
+
+ if (likely(cur_index != index))
+ ufs_put_locked_page(page);
+ }
+ UFSD("EXIT\n");
+}
+
+static void ufs_clear_frags(struct inode *inode, sector_t beg, unsigned int n,
+ int sync)
+{
+ struct buffer_head *bh;
+ sector_t end = beg + n;
+
+ for (; beg < end; ++beg) {
+ bh = sb_getblk(inode->i_sb, beg);
+ lock_buffer(bh);
+ memset(bh->b_data, 0, inode->i_sb->s_blocksize);
+ set_buffer_uptodate(bh);
+ mark_buffer_dirty(bh);
+ unlock_buffer(bh);
+ if (IS_SYNC(inode) || sync)
+ sync_dirty_buffer(bh);
+ brelse(bh);
+ }
+}
+
+u64 ufs_new_fragments(struct inode *inode, void *p, u64 fragment,
+ u64 goal, unsigned count, int *err,
+ struct page *locked_page)
+{
+ struct super_block * sb;
+ struct ufs_sb_private_info * uspi;
+ struct ufs_super_block_first * usb1;
+ unsigned cgno, oldcount, newcount;
+ u64 tmp, request, result;
+
+ UFSD("ENTER, ino %lu, fragment %llu, goal %llu, count %u\n",
+ inode->i_ino, (unsigned long long)fragment,
+ (unsigned long long)goal, count);
+
+ sb = inode->i_sb;
+ uspi = UFS_SB(sb)->s_uspi;
+ usb1 = ubh_get_usb_first(uspi);
+ *err = -ENOSPC;
+
+ mutex_lock(&UFS_SB(sb)->s_lock);
+ tmp = ufs_data_ptr_to_cpu(sb, p);
+
+ if (count + ufs_fragnum(fragment) > uspi->s_fpb) {
+ ufs_warning(sb, "ufs_new_fragments", "internal warning"
+ " fragment %llu, count %u",
+ (unsigned long long)fragment, count);
+ count = uspi->s_fpb - ufs_fragnum(fragment);
+ }
+ oldcount = ufs_fragnum (fragment);
+ newcount = oldcount + count;
+
+ /*
+ * Somebody else has just allocated our fragments
+ */
+ if (oldcount) {
+ if (!tmp) {
+ ufs_error(sb, "ufs_new_fragments", "internal error, "
+ "fragment %llu, tmp %llu\n",
+ (unsigned long long)fragment,
+ (unsigned long long)tmp);
+ mutex_unlock(&UFS_SB(sb)->s_lock);
+ return INVBLOCK;
+ }
+ if (fragment < UFS_I(inode)->i_lastfrag) {
+ UFSD("EXIT (ALREADY ALLOCATED)\n");
+ mutex_unlock(&UFS_SB(sb)->s_lock);
+ return 0;
+ }
+ }
+ else {
+ if (tmp) {
+ UFSD("EXIT (ALREADY ALLOCATED)\n");
+ mutex_unlock(&UFS_SB(sb)->s_lock);
+ return 0;
+ }
+ }
+
+ /*
+ * There is not enough space for user on the device
+ */
+ if (!capable(CAP_SYS_RESOURCE) && ufs_freespace(uspi, UFS_MINFREE) <= 0) {
+ mutex_unlock(&UFS_SB(sb)->s_lock);
+ UFSD("EXIT (FAILED)\n");
+ return 0;
+ }
+
+ if (goal >= uspi->s_size)
+ goal = 0;
+ if (goal == 0)
+ cgno = ufs_inotocg (inode->i_ino);
+ else
+ cgno = ufs_dtog(uspi, goal);
+
+ /*
+ * allocate new fragment
+ */
+ if (oldcount == 0) {
+ result = ufs_alloc_fragments (inode, cgno, goal, count, err);
+ if (result) {
+ ufs_cpu_to_data_ptr(sb, p, result);
+ *err = 0;
+ UFS_I(inode)->i_lastfrag =
+ max(UFS_I(inode)->i_lastfrag, fragment + count);
+ ufs_clear_frags(inode, result + oldcount,
+ newcount - oldcount, locked_page != NULL);
+ }
+ mutex_unlock(&UFS_SB(sb)->s_lock);
+ UFSD("EXIT, result %llu\n", (unsigned long long)result);
+ return result;
+ }
+
+ /*
+ * resize block
+ */
+ result = ufs_add_fragments(inode, tmp, oldcount, newcount);
+ if (result) {
+ *err = 0;
+ UFS_I(inode)->i_lastfrag = max(UFS_I(inode)->i_lastfrag,
+ fragment + count);
+ ufs_clear_frags(inode, result + oldcount, newcount - oldcount,
+ locked_page != NULL);
+ mutex_unlock(&UFS_SB(sb)->s_lock);
+ UFSD("EXIT, result %llu\n", (unsigned long long)result);
+ return result;
+ }
+
+ /*
+ * allocate new block and move data
+ */
+ switch (fs32_to_cpu(sb, usb1->fs_optim)) {
+ case UFS_OPTSPACE:
+ request = newcount;
+ if (uspi->s_minfree < 5 || uspi->cs_total.cs_nffree
+ > uspi->s_dsize * uspi->s_minfree / (2 * 100))
+ break;
+ usb1->fs_optim = cpu_to_fs32(sb, UFS_OPTTIME);
+ break;
+ default:
+ usb1->fs_optim = cpu_to_fs32(sb, UFS_OPTTIME);
+
+ case UFS_OPTTIME:
+ request = uspi->s_fpb;
+ if (uspi->cs_total.cs_nffree < uspi->s_dsize *
+ (uspi->s_minfree - 2) / 100)
+ break;
+ usb1->fs_optim = cpu_to_fs32(sb, UFS_OPTTIME);
+ break;
+ }
+ result = ufs_alloc_fragments (inode, cgno, goal, request, err);
+ if (result) {
+ ufs_clear_frags(inode, result + oldcount, newcount - oldcount,
+ locked_page != NULL);
+ ufs_change_blocknr(inode, fragment - oldcount, oldcount,
+ uspi->s_sbbase + tmp,
+ uspi->s_sbbase + result, locked_page);
+ ufs_cpu_to_data_ptr(sb, p, result);
+ *err = 0;
+ UFS_I(inode)->i_lastfrag = max(UFS_I(inode)->i_lastfrag,
+ fragment + count);
+ mutex_unlock(&UFS_SB(sb)->s_lock);
+ if (newcount < request)
+ ufs_free_fragments (inode, result + newcount, request - newcount);
+ ufs_free_fragments (inode, tmp, oldcount);
+ UFSD("EXIT, result %llu\n", (unsigned long long)result);
+ return result;
+ }
+
+ mutex_unlock(&UFS_SB(sb)->s_lock);
+ UFSD("EXIT (FAILED)\n");
+ return 0;
+}
+
+static u64 ufs_add_fragments(struct inode *inode, u64 fragment,
+ unsigned oldcount, unsigned newcount)
+{
+ struct super_block * sb;
+ struct ufs_sb_private_info * uspi;
+ struct ufs_cg_private_info * ucpi;
+ struct ufs_cylinder_group * ucg;
+ unsigned cgno, fragno, fragoff, count, fragsize, i;
+
+ UFSD("ENTER, fragment %llu, oldcount %u, newcount %u\n",
+ (unsigned long long)fragment, oldcount, newcount);
+
+ sb = inode->i_sb;
+ uspi = UFS_SB(sb)->s_uspi;
+ count = newcount - oldcount;
+
+ cgno = ufs_dtog(uspi, fragment);
+ if (fs32_to_cpu(sb, UFS_SB(sb)->fs_cs(cgno).cs_nffree) < count)
+ return 0;
+ if ((ufs_fragnum (fragment) + newcount) > uspi->s_fpb)
+ return 0;
+ ucpi = ufs_load_cylinder (sb, cgno);
+ if (!ucpi)
+ return 0;
+ ucg = ubh_get_ucg (UCPI_UBH(ucpi));
+ if (!ufs_cg_chkmagic(sb, ucg)) {
+ ufs_panic (sb, "ufs_add_fragments",
+ "internal error, bad magic number on cg %u", cgno);
+ return 0;
+ }
+
+ fragno = ufs_dtogd(uspi, fragment);
+ fragoff = ufs_fragnum (fragno);
+ for (i = oldcount; i < newcount; i++)
+ if (ubh_isclr (UCPI_UBH(ucpi), ucpi->c_freeoff, fragno + i))
+ return 0;
+ /*
+ * Block can be extended
+ */
+ ucg->cg_time = cpu_to_fs32(sb, get_seconds());
+ for (i = newcount; i < (uspi->s_fpb - fragoff); i++)
+ if (ubh_isclr (UCPI_UBH(ucpi), ucpi->c_freeoff, fragno + i))
+ break;
+ fragsize = i - oldcount;
+ if (!fs32_to_cpu(sb, ucg->cg_frsum[fragsize]))
+ ufs_panic (sb, "ufs_add_fragments",
+ "internal error or corrupted bitmap on cg %u", cgno);
+ fs32_sub(sb, &ucg->cg_frsum[fragsize], 1);
+ if (fragsize != count)
+ fs32_add(sb, &ucg->cg_frsum[fragsize - count], 1);
+ for (i = oldcount; i < newcount; i++)
+ ubh_clrbit (UCPI_UBH(ucpi), ucpi->c_freeoff, fragno + i);
+
+ fs32_sub(sb, &ucg->cg_cs.cs_nffree, count);
+ fs32_sub(sb, &UFS_SB(sb)->fs_cs(cgno).cs_nffree, count);
+ uspi->cs_total.cs_nffree -= count;
+
+ ubh_mark_buffer_dirty (USPI_UBH(uspi));
+ ubh_mark_buffer_dirty (UCPI_UBH(ucpi));
+ if (sb->s_flags & MS_SYNCHRONOUS)
+ ubh_sync_block(UCPI_UBH(ucpi));
+ ufs_mark_sb_dirty(sb);
+
+ UFSD("EXIT, fragment %llu\n", (unsigned long long)fragment);
+
+ return fragment;
+}
+
+#define UFS_TEST_FREE_SPACE_CG \
+ ucg = (struct ufs_cylinder_group *) UFS_SB(sb)->s_ucg[cgno]->b_data; \
+ if (fs32_to_cpu(sb, ucg->cg_cs.cs_nbfree)) \
+ goto cg_found; \
+ for (k = count; k < uspi->s_fpb; k++) \
+ if (fs32_to_cpu(sb, ucg->cg_frsum[k])) \
+ goto cg_found;
+
+static u64 ufs_alloc_fragments(struct inode *inode, unsigned cgno,
+ u64 goal, unsigned count, int *err)
+{
+ struct super_block * sb;
+ struct ufs_sb_private_info * uspi;
+ struct ufs_cg_private_info * ucpi;
+ struct ufs_cylinder_group * ucg;
+ unsigned oldcg, i, j, k, allocsize;
+ u64 result;
+
+ UFSD("ENTER, ino %lu, cgno %u, goal %llu, count %u\n",
+ inode->i_ino, cgno, (unsigned long long)goal, count);
+
+ sb = inode->i_sb;
+ uspi = UFS_SB(sb)->s_uspi;
+ oldcg = cgno;
+
+ /*
+ * 1. searching on preferred cylinder group
+ */
+ UFS_TEST_FREE_SPACE_CG
+
+ /*
+ * 2. quadratic rehash
+ */
+ for (j = 1; j < uspi->s_ncg; j *= 2) {
+ cgno += j;
+ if (cgno >= uspi->s_ncg)
+ cgno -= uspi->s_ncg;
+ UFS_TEST_FREE_SPACE_CG
+ }
+
+ /*
+ * 3. brute force search
+ * We start at i = 2 ( 0 is checked at 1.step, 1 at 2.step )
+ */
+ cgno = (oldcg + 1) % uspi->s_ncg;
+ for (j = 2; j < uspi->s_ncg; j++) {
+ cgno++;
+ if (cgno >= uspi->s_ncg)
+ cgno = 0;
+ UFS_TEST_FREE_SPACE_CG
+ }
+
+ UFSD("EXIT (FAILED)\n");
+ return 0;
+
+cg_found:
+ ucpi = ufs_load_cylinder (sb, cgno);
+ if (!ucpi)
+ return 0;
+ ucg = ubh_get_ucg (UCPI_UBH(ucpi));
+ if (!ufs_cg_chkmagic(sb, ucg))
+ ufs_panic (sb, "ufs_alloc_fragments",
+ "internal error, bad magic number on cg %u", cgno);
+ ucg->cg_time = cpu_to_fs32(sb, get_seconds());
+
+ if (count == uspi->s_fpb) {
+ result = ufs_alloccg_block (inode, ucpi, goal, err);
+ if (result == INVBLOCK)
+ return 0;
+ goto succed;
+ }
+
+ for (allocsize = count; allocsize < uspi->s_fpb; allocsize++)
+ if (fs32_to_cpu(sb, ucg->cg_frsum[allocsize]) != 0)
+ break;
+
+ if (allocsize == uspi->s_fpb) {
+ result = ufs_alloccg_block (inode, ucpi, goal, err);
+ if (result == INVBLOCK)
+ return 0;
+ goal = ufs_dtogd(uspi, result);
+ for (i = count; i < uspi->s_fpb; i++)
+ ubh_setbit (UCPI_UBH(ucpi), ucpi->c_freeoff, goal + i);
+ i = uspi->s_fpb - count;
+
+ fs32_add(sb, &ucg->cg_cs.cs_nffree, i);
+ uspi->cs_total.cs_nffree += i;
+ fs32_add(sb, &UFS_SB(sb)->fs_cs(cgno).cs_nffree, i);
+ fs32_add(sb, &ucg->cg_frsum[i], 1);
+ goto succed;
+ }
+
+ result = ufs_bitmap_search (sb, ucpi, goal, allocsize);
+ if (result == INVBLOCK)
+ return 0;
+ for (i = 0; i < count; i++)
+ ubh_clrbit (UCPI_UBH(ucpi), ucpi->c_freeoff, result + i);
+
+ fs32_sub(sb, &ucg->cg_cs.cs_nffree, count);
+ uspi->cs_total.cs_nffree -= count;
+ fs32_sub(sb, &UFS_SB(sb)->fs_cs(cgno).cs_nffree, count);
+ fs32_sub(sb, &ucg->cg_frsum[allocsize], 1);
+
+ if (count != allocsize)
+ fs32_add(sb, &ucg->cg_frsum[allocsize - count], 1);
+
+succed:
+ ubh_mark_buffer_dirty (USPI_UBH(uspi));
+ ubh_mark_buffer_dirty (UCPI_UBH(ucpi));
+ if (sb->s_flags & MS_SYNCHRONOUS)
+ ubh_sync_block(UCPI_UBH(ucpi));
+ ufs_mark_sb_dirty(sb);
+
+ result += cgno * uspi->s_fpg;
+ UFSD("EXIT3, result %llu\n", (unsigned long long)result);
+ return result;
+}
+
+static u64 ufs_alloccg_block(struct inode *inode,
+ struct ufs_cg_private_info *ucpi,
+ u64 goal, int *err)
+{
+ struct super_block * sb;
+ struct ufs_sb_private_info * uspi;
+ struct ufs_cylinder_group * ucg;
+ u64 result, blkno;
+
+ UFSD("ENTER, goal %llu\n", (unsigned long long)goal);
+
+ sb = inode->i_sb;
+ uspi = UFS_SB(sb)->s_uspi;
+ ucg = ubh_get_ucg(UCPI_UBH(ucpi));
+
+ if (goal == 0) {
+ goal = ucpi->c_rotor;
+ goto norot;
+ }
+ goal = ufs_blknum (goal);
+ goal = ufs_dtogd(uspi, goal);
+
+ /*
+ * If the requested block is available, use it.
+ */
+ if (ubh_isblockset(UCPI_UBH(ucpi), ucpi->c_freeoff, ufs_fragstoblks(goal))) {
+ result = goal;
+ goto gotit;
+ }
+
+norot:
+ result = ufs_bitmap_search (sb, ucpi, goal, uspi->s_fpb);
+ if (result == INVBLOCK)
+ return INVBLOCK;
+ ucpi->c_rotor = result;
+gotit:
+ blkno = ufs_fragstoblks(result);
+ ubh_clrblock (UCPI_UBH(ucpi), ucpi->c_freeoff, blkno);
+ if ((UFS_SB(sb)->s_flags & UFS_CG_MASK) == UFS_CG_44BSD)
+ ufs_clusteracct (sb, ucpi, blkno, -1);
+
+ fs32_sub(sb, &ucg->cg_cs.cs_nbfree, 1);
+ uspi->cs_total.cs_nbfree--;
+ fs32_sub(sb, &UFS_SB(sb)->fs_cs(ucpi->c_cgx).cs_nbfree, 1);
+
+ if (uspi->fs_magic != UFS2_MAGIC) {
+ unsigned cylno = ufs_cbtocylno((unsigned)result);
+
+ fs16_sub(sb, &ubh_cg_blks(ucpi, cylno,
+ ufs_cbtorpos((unsigned)result)), 1);
+ fs32_sub(sb, &ubh_cg_blktot(ucpi, cylno), 1);
+ }
+
+ UFSD("EXIT, result %llu\n", (unsigned long long)result);
+
+ return result;
+}
+
+static unsigned ubh_scanc(struct ufs_sb_private_info *uspi,
+ struct ufs_buffer_head *ubh,
+ unsigned begin, unsigned size,
+ unsigned char *table, unsigned char mask)
+{
+ unsigned rest, offset;
+ unsigned char *cp;
+
+
+ offset = begin & ~uspi->s_fmask;
+ begin >>= uspi->s_fshift;
+ for (;;) {
+ if ((offset + size) < uspi->s_fsize)
+ rest = size;
+ else
+ rest = uspi->s_fsize - offset;
+ size -= rest;
+ cp = ubh->bh[begin]->b_data + offset;
+ while ((table[*cp++] & mask) == 0 && --rest)
+ ;
+ if (rest || !size)
+ break;
+ begin++;
+ offset = 0;
+ }
+ return (size + rest);
+}
+
+/*
+ * Find a block of the specified size in the specified cylinder group.
+ * @sp: pointer to super block
+ * @ucpi: pointer to cylinder group info
+ * @goal: near which block we want find new one
+ * @count: specified size
+ */
+static u64 ufs_bitmap_search(struct super_block *sb,
+ struct ufs_cg_private_info *ucpi,
+ u64 goal, unsigned count)
+{
+ /*
+ * Bit patterns for identifying fragments in the block map
+ * used as ((map & mask_arr) == want_arr)
+ */
+ static const int mask_arr[9] = {
+ 0x3, 0x7, 0xf, 0x1f, 0x3f, 0x7f, 0xff, 0x1ff, 0x3ff
+ };
+ static const int want_arr[9] = {
+ 0x0, 0x2, 0x6, 0xe, 0x1e, 0x3e, 0x7e, 0xfe, 0x1fe
+ };
+ struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
+ unsigned start, length, loc;
+ unsigned pos, want, blockmap, mask, end;
+ u64 result;
+
+ UFSD("ENTER, cg %u, goal %llu, count %u\n", ucpi->c_cgx,
+ (unsigned long long)goal, count);
+
+ if (goal)
+ start = ufs_dtogd(uspi, goal) >> 3;
+ else
+ start = ucpi->c_frotor >> 3;
+
+ length = ((uspi->s_fpg + 7) >> 3) - start;
+ loc = ubh_scanc(uspi, UCPI_UBH(ucpi), ucpi->c_freeoff + start, length,
+ (uspi->s_fpb == 8) ? ufs_fragtable_8fpb : ufs_fragtable_other,
+ 1 << (count - 1 + (uspi->s_fpb & 7)));
+ if (loc == 0) {
+ length = start + 1;
+ loc = ubh_scanc(uspi, UCPI_UBH(ucpi), ucpi->c_freeoff, length,
+ (uspi->s_fpb == 8) ? ufs_fragtable_8fpb :
+ ufs_fragtable_other,
+ 1 << (count - 1 + (uspi->s_fpb & 7)));
+ if (loc == 0) {
+ ufs_error(sb, "ufs_bitmap_search",
+ "bitmap corrupted on cg %u, start %u,"
+ " length %u, count %u, freeoff %u\n",
+ ucpi->c_cgx, start, length, count,
+ ucpi->c_freeoff);
+ return INVBLOCK;
+ }
+ start = 0;
+ }
+ result = (start + length - loc) << 3;
+ ucpi->c_frotor = result;
+
+ /*
+ * found the byte in the map
+ */
+
+ for (end = result + 8; result < end; result += uspi->s_fpb) {
+ blockmap = ubh_blkmap(UCPI_UBH(ucpi), ucpi->c_freeoff, result);
+ blockmap <<= 1;
+ mask = mask_arr[count];
+ want = want_arr[count];
+ for (pos = 0; pos <= uspi->s_fpb - count; pos++) {
+ if ((blockmap & mask) == want) {
+ UFSD("EXIT, result %llu\n",
+ (unsigned long long)result);
+ return result + pos;
+ }
+ mask <<= 1;
+ want <<= 1;
+ }
+ }
+
+ ufs_error(sb, "ufs_bitmap_search", "block not in map on cg %u\n",
+ ucpi->c_cgx);
+ UFSD("EXIT (FAILED)\n");
+ return INVBLOCK;
+}
+
+static void ufs_clusteracct(struct super_block * sb,
+ struct ufs_cg_private_info * ucpi, unsigned blkno, int cnt)
+{
+ struct ufs_sb_private_info * uspi;
+ int i, start, end, forw, back;
+
+ uspi = UFS_SB(sb)->s_uspi;
+ if (uspi->s_contigsumsize <= 0)
+ return;
+
+ if (cnt > 0)
+ ubh_setbit(UCPI_UBH(ucpi), ucpi->c_clusteroff, blkno);
+ else
+ ubh_clrbit(UCPI_UBH(ucpi), ucpi->c_clusteroff, blkno);
+
+ /*
+ * Find the size of the cluster going forward.
+ */
+ start = blkno + 1;
+ end = start + uspi->s_contigsumsize;
+ if ( end >= ucpi->c_nclusterblks)
+ end = ucpi->c_nclusterblks;
+ i = ubh_find_next_zero_bit (UCPI_UBH(ucpi), ucpi->c_clusteroff, end, start);
+ if (i > end)
+ i = end;
+ forw = i - start;
+
+ /*
+ * Find the size of the cluster going backward.
+ */
+ start = blkno - 1;
+ end = start - uspi->s_contigsumsize;
+ if (end < 0 )
+ end = -1;
+ i = ubh_find_last_zero_bit (UCPI_UBH(ucpi), ucpi->c_clusteroff, start, end);
+ if ( i < end)
+ i = end;
+ back = start - i;
+
+ /*
+ * Account for old cluster and the possibly new forward and
+ * back clusters.
+ */
+ i = back + forw + 1;
+ if (i > uspi->s_contigsumsize)
+ i = uspi->s_contigsumsize;
+ fs32_add(sb, (__fs32*)ubh_get_addr(UCPI_UBH(ucpi), ucpi->c_clustersumoff + (i << 2)), cnt);
+ if (back > 0)
+ fs32_sub(sb, (__fs32*)ubh_get_addr(UCPI_UBH(ucpi), ucpi->c_clustersumoff + (back << 2)), cnt);
+ if (forw > 0)
+ fs32_sub(sb, (__fs32*)ubh_get_addr(UCPI_UBH(ucpi), ucpi->c_clustersumoff + (forw << 2)), cnt);
+}
+
+
+static unsigned char ufs_fragtable_8fpb[] = {
+ 0x00, 0x01, 0x01, 0x02, 0x01, 0x01, 0x02, 0x04, 0x01, 0x01, 0x01, 0x03, 0x02, 0x03, 0x04, 0x08,
+ 0x01, 0x01, 0x01, 0x03, 0x01, 0x01, 0x03, 0x05, 0x02, 0x03, 0x03, 0x02, 0x04, 0x05, 0x08, 0x10,
+ 0x01, 0x01, 0x01, 0x03, 0x01, 0x01, 0x03, 0x05, 0x01, 0x01, 0x01, 0x03, 0x03, 0x03, 0x05, 0x09,
+ 0x02, 0x03, 0x03, 0x02, 0x03, 0x03, 0x02, 0x06, 0x04, 0x05, 0x05, 0x06, 0x08, 0x09, 0x10, 0x20,
+ 0x01, 0x01, 0x01, 0x03, 0x01, 0x01, 0x03, 0x05, 0x01, 0x01, 0x01, 0x03, 0x03, 0x03, 0x05, 0x09,
+ 0x01, 0x01, 0x01, 0x03, 0x01, 0x01, 0x03, 0x05, 0x03, 0x03, 0x03, 0x03, 0x05, 0x05, 0x09, 0x11,
+ 0x02, 0x03, 0x03, 0x02, 0x03, 0x03, 0x02, 0x06, 0x03, 0x03, 0x03, 0x03, 0x02, 0x03, 0x06, 0x0A,
+ 0x04, 0x05, 0x05, 0x06, 0x05, 0x05, 0x06, 0x04, 0x08, 0x09, 0x09, 0x0A, 0x10, 0x11, 0x20, 0x40,
+ 0x01, 0x01, 0x01, 0x03, 0x01, 0x01, 0x03, 0x05, 0x01, 0x01, 0x01, 0x03, 0x03, 0x03, 0x05, 0x09,
+ 0x01, 0x01, 0x01, 0x03, 0x01, 0x01, 0x03, 0x05, 0x03, 0x03, 0x03, 0x03, 0x05, 0x05, 0x09, 0x11,
+ 0x01, 0x01, 0x01, 0x03, 0x01, 0x01, 0x03, 0x05, 0x01, 0x01, 0x01, 0x03, 0x03, 0x03, 0x05, 0x09,
+ 0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x07, 0x05, 0x05, 0x05, 0x07, 0x09, 0x09, 0x11, 0x21,
+ 0x02, 0x03, 0x03, 0x02, 0x03, 0x03, 0x02, 0x06, 0x03, 0x03, 0x03, 0x03, 0x02, 0x03, 0x06, 0x0A,
+ 0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x07, 0x02, 0x03, 0x03, 0x02, 0x06, 0x07, 0x0A, 0x12,
+ 0x04, 0x05, 0x05, 0x06, 0x05, 0x05, 0x06, 0x04, 0x05, 0x05, 0x05, 0x07, 0x06, 0x07, 0x04, 0x0C,
+ 0x08, 0x09, 0x09, 0x0A, 0x09, 0x09, 0x0A, 0x0C, 0x10, 0x11, 0x11, 0x12, 0x20, 0x21, 0x40, 0x80,
+};
+
+static unsigned char ufs_fragtable_other[] = {
+ 0x00, 0x16, 0x16, 0x2A, 0x16, 0x16, 0x26, 0x4E, 0x16, 0x16, 0x16, 0x3E, 0x2A, 0x3E, 0x4E, 0x8A,
+ 0x16, 0x16, 0x16, 0x3E, 0x16, 0x16, 0x36, 0x5E, 0x16, 0x16, 0x16, 0x3E, 0x3E, 0x3E, 0x5E, 0x9E,
+ 0x16, 0x16, 0x16, 0x3E, 0x16, 0x16, 0x36, 0x5E, 0x16, 0x16, 0x16, 0x3E, 0x3E, 0x3E, 0x5E, 0x9E,
+ 0x2A, 0x3E, 0x3E, 0x2A, 0x3E, 0x3E, 0x2E, 0x6E, 0x3E, 0x3E, 0x3E, 0x3E, 0x2A, 0x3E, 0x6E, 0xAA,
+ 0x16, 0x16, 0x16, 0x3E, 0x16, 0x16, 0x36, 0x5E, 0x16, 0x16, 0x16, 0x3E, 0x3E, 0x3E, 0x5E, 0x9E,
+ 0x16, 0x16, 0x16, 0x3E, 0x16, 0x16, 0x36, 0x5E, 0x16, 0x16, 0x16, 0x3E, 0x3E, 0x3E, 0x5E, 0x9E,
+ 0x26, 0x36, 0x36, 0x2E, 0x36, 0x36, 0x26, 0x6E, 0x36, 0x36, 0x36, 0x3E, 0x2E, 0x3E, 0x6E, 0xAE,
+ 0x4E, 0x5E, 0x5E, 0x6E, 0x5E, 0x5E, 0x6E, 0x4E, 0x5E, 0x5E, 0x5E, 0x7E, 0x6E, 0x7E, 0x4E, 0xCE,
+ 0x16, 0x16, 0x16, 0x3E, 0x16, 0x16, 0x36, 0x5E, 0x16, 0x16, 0x16, 0x3E, 0x3E, 0x3E, 0x5E, 0x9E,
+ 0x16, 0x16, 0x16, 0x3E, 0x16, 0x16, 0x36, 0x5E, 0x16, 0x16, 0x16, 0x3E, 0x3E, 0x3E, 0x5E, 0x9E,
+ 0x16, 0x16, 0x16, 0x3E, 0x16, 0x16, 0x36, 0x5E, 0x16, 0x16, 0x16, 0x3E, 0x3E, 0x3E, 0x5E, 0x9E,
+ 0x3E, 0x3E, 0x3E, 0x3E, 0x3E, 0x3E, 0x3E, 0x7E, 0x3E, 0x3E, 0x3E, 0x3E, 0x3E, 0x3E, 0x7E, 0xBE,
+ 0x2A, 0x3E, 0x3E, 0x2A, 0x3E, 0x3E, 0x2E, 0x6E, 0x3E, 0x3E, 0x3E, 0x3E, 0x2A, 0x3E, 0x6E, 0xAA,
+ 0x3E, 0x3E, 0x3E, 0x3E, 0x3E, 0x3E, 0x3E, 0x7E, 0x3E, 0x3E, 0x3E, 0x3E, 0x3E, 0x3E, 0x7E, 0xBE,
+ 0x4E, 0x5E, 0x5E, 0x6E, 0x5E, 0x5E, 0x6E, 0x4E, 0x5E, 0x5E, 0x5E, 0x7E, 0x6E, 0x7E, 0x4E, 0xCE,
+ 0x8A, 0x9E, 0x9E, 0xAA, 0x9E, 0x9E, 0xAE, 0xCE, 0x9E, 0x9E, 0x9E, 0xBE, 0xAA, 0xBE, 0xCE, 0x8A,
+};
diff --git a/fs/ufs/cylinder.c b/fs/ufs/cylinder.c
new file mode 100644
index 000000000..b4676322d
--- /dev/null
+++ b/fs/ufs/cylinder.c
@@ -0,0 +1,201 @@
+/*
+ * linux/fs/ufs/cylinder.c
+ *
+ * Copyright (C) 1998
+ * Daniel Pirkl <daniel.pirkl@email.cz>
+ * Charles University, Faculty of Mathematics and Physics
+ *
+ * ext2 - inode (block) bitmap caching inspired
+ */
+
+#include <linux/fs.h>
+#include <linux/time.h>
+#include <linux/stat.h>
+#include <linux/string.h>
+#include <linux/bitops.h>
+
+#include <asm/byteorder.h>
+
+#include "ufs_fs.h"
+#include "ufs.h"
+#include "swab.h"
+#include "util.h"
+
+/*
+ * Read cylinder group into cache. The memory space for ufs_cg_private_info
+ * structure is already allocated during ufs_read_super.
+ */
+static void ufs_read_cylinder (struct super_block * sb,
+ unsigned cgno, unsigned bitmap_nr)
+{
+ struct ufs_sb_info * sbi = UFS_SB(sb);
+ struct ufs_sb_private_info * uspi;
+ struct ufs_cg_private_info * ucpi;
+ struct ufs_cylinder_group * ucg;
+ unsigned i, j;
+
+ UFSD("ENTER, cgno %u, bitmap_nr %u\n", cgno, bitmap_nr);
+ uspi = sbi->s_uspi;
+ ucpi = sbi->s_ucpi[bitmap_nr];
+ ucg = (struct ufs_cylinder_group *)sbi->s_ucg[cgno]->b_data;
+
+ UCPI_UBH(ucpi)->fragment = ufs_cgcmin(cgno);
+ UCPI_UBH(ucpi)->count = uspi->s_cgsize >> sb->s_blocksize_bits;
+ /*
+ * We have already the first fragment of cylinder group block in buffer
+ */
+ UCPI_UBH(ucpi)->bh[0] = sbi->s_ucg[cgno];
+ for (i = 1; i < UCPI_UBH(ucpi)->count; i++)
+ if (!(UCPI_UBH(ucpi)->bh[i] = sb_bread(sb, UCPI_UBH(ucpi)->fragment + i)))
+ goto failed;
+ sbi->s_cgno[bitmap_nr] = cgno;
+
+ ucpi->c_cgx = fs32_to_cpu(sb, ucg->cg_cgx);
+ ucpi->c_ncyl = fs16_to_cpu(sb, ucg->cg_ncyl);
+ ucpi->c_niblk = fs16_to_cpu(sb, ucg->cg_niblk);
+ ucpi->c_ndblk = fs32_to_cpu(sb, ucg->cg_ndblk);
+ ucpi->c_rotor = fs32_to_cpu(sb, ucg->cg_rotor);
+ ucpi->c_frotor = fs32_to_cpu(sb, ucg->cg_frotor);
+ ucpi->c_irotor = fs32_to_cpu(sb, ucg->cg_irotor);
+ ucpi->c_btotoff = fs32_to_cpu(sb, ucg->cg_btotoff);
+ ucpi->c_boff = fs32_to_cpu(sb, ucg->cg_boff);
+ ucpi->c_iusedoff = fs32_to_cpu(sb, ucg->cg_iusedoff);
+ ucpi->c_freeoff = fs32_to_cpu(sb, ucg->cg_freeoff);
+ ucpi->c_nextfreeoff = fs32_to_cpu(sb, ucg->cg_nextfreeoff);
+ ucpi->c_clustersumoff = fs32_to_cpu(sb, ucg->cg_u.cg_44.cg_clustersumoff);
+ ucpi->c_clusteroff = fs32_to_cpu(sb, ucg->cg_u.cg_44.cg_clusteroff);
+ ucpi->c_nclusterblks = fs32_to_cpu(sb, ucg->cg_u.cg_44.cg_nclusterblks);
+ UFSD("EXIT\n");
+ return;
+
+failed:
+ for (j = 1; j < i; j++)
+ brelse (sbi->s_ucg[j]);
+ sbi->s_cgno[bitmap_nr] = UFS_CGNO_EMPTY;
+ ufs_error (sb, "ufs_read_cylinder", "can't read cylinder group block %u", cgno);
+}
+
+/*
+ * Remove cylinder group from cache, doesn't release memory
+ * allocated for cylinder group (this is done at ufs_put_super only).
+ */
+void ufs_put_cylinder (struct super_block * sb, unsigned bitmap_nr)
+{
+ struct ufs_sb_info * sbi = UFS_SB(sb);
+ struct ufs_sb_private_info * uspi;
+ struct ufs_cg_private_info * ucpi;
+ struct ufs_cylinder_group * ucg;
+ unsigned i;
+
+ UFSD("ENTER, bitmap_nr %u\n", bitmap_nr);
+
+ uspi = sbi->s_uspi;
+ if (sbi->s_cgno[bitmap_nr] == UFS_CGNO_EMPTY) {
+ UFSD("EXIT\n");
+ return;
+ }
+ ucpi = sbi->s_ucpi[bitmap_nr];
+ ucg = ubh_get_ucg(UCPI_UBH(ucpi));
+
+ if (uspi->s_ncg > UFS_MAX_GROUP_LOADED && bitmap_nr >= sbi->s_cg_loaded) {
+ ufs_panic (sb, "ufs_put_cylinder", "internal error");
+ return;
+ }
+ /*
+ * rotor is not so important data, so we put it to disk
+ * at the end of working with cylinder
+ */
+ ucg->cg_rotor = cpu_to_fs32(sb, ucpi->c_rotor);
+ ucg->cg_frotor = cpu_to_fs32(sb, ucpi->c_frotor);
+ ucg->cg_irotor = cpu_to_fs32(sb, ucpi->c_irotor);
+ ubh_mark_buffer_dirty (UCPI_UBH(ucpi));
+ for (i = 1; i < UCPI_UBH(ucpi)->count; i++) {
+ brelse (UCPI_UBH(ucpi)->bh[i]);
+ }
+
+ sbi->s_cgno[bitmap_nr] = UFS_CGNO_EMPTY;
+ UFSD("EXIT\n");
+}
+
+/*
+ * Find cylinder group in cache and return it as pointer.
+ * If cylinder group is not in cache, we will load it from disk.
+ *
+ * The cache is managed by LRU algorithm.
+ */
+struct ufs_cg_private_info * ufs_load_cylinder (
+ struct super_block * sb, unsigned cgno)
+{
+ struct ufs_sb_info * sbi = UFS_SB(sb);
+ struct ufs_sb_private_info * uspi;
+ struct ufs_cg_private_info * ucpi;
+ unsigned cg, i, j;
+
+ UFSD("ENTER, cgno %u\n", cgno);
+
+ uspi = sbi->s_uspi;
+ if (cgno >= uspi->s_ncg) {
+ ufs_panic (sb, "ufs_load_cylinder", "internal error, high number of cg");
+ return NULL;
+ }
+ /*
+ * Cylinder group number cg it in cache and it was last used
+ */
+ if (sbi->s_cgno[0] == cgno) {
+ UFSD("EXIT\n");
+ return sbi->s_ucpi[0];
+ }
+ /*
+ * Number of cylinder groups is not higher than UFS_MAX_GROUP_LOADED
+ */
+ if (uspi->s_ncg <= UFS_MAX_GROUP_LOADED) {
+ if (sbi->s_cgno[cgno] != UFS_CGNO_EMPTY) {
+ if (sbi->s_cgno[cgno] != cgno) {
+ ufs_panic (sb, "ufs_load_cylinder", "internal error, wrong number of cg in cache");
+ UFSD("EXIT (FAILED)\n");
+ return NULL;
+ }
+ else {
+ UFSD("EXIT\n");
+ return sbi->s_ucpi[cgno];
+ }
+ } else {
+ ufs_read_cylinder (sb, cgno, cgno);
+ UFSD("EXIT\n");
+ return sbi->s_ucpi[cgno];
+ }
+ }
+ /*
+ * Cylinder group number cg is in cache but it was not last used,
+ * we will move to the first position
+ */
+ for (i = 0; i < sbi->s_cg_loaded && sbi->s_cgno[i] != cgno; i++);
+ if (i < sbi->s_cg_loaded && sbi->s_cgno[i] == cgno) {
+ cg = sbi->s_cgno[i];
+ ucpi = sbi->s_ucpi[i];
+ for (j = i; j > 0; j--) {
+ sbi->s_cgno[j] = sbi->s_cgno[j-1];
+ sbi->s_ucpi[j] = sbi->s_ucpi[j-1];
+ }
+ sbi->s_cgno[0] = cg;
+ sbi->s_ucpi[0] = ucpi;
+ /*
+ * Cylinder group number cg is not in cache, we will read it from disk
+ * and put it to the first position
+ */
+ } else {
+ if (sbi->s_cg_loaded < UFS_MAX_GROUP_LOADED)
+ sbi->s_cg_loaded++;
+ else
+ ufs_put_cylinder (sb, UFS_MAX_GROUP_LOADED-1);
+ ucpi = sbi->s_ucpi[sbi->s_cg_loaded - 1];
+ for (j = sbi->s_cg_loaded - 1; j > 0; j--) {
+ sbi->s_cgno[j] = sbi->s_cgno[j-1];
+ sbi->s_ucpi[j] = sbi->s_ucpi[j-1];
+ }
+ sbi->s_ucpi[0] = ucpi;
+ ufs_read_cylinder (sb, cgno, 0);
+ }
+ UFSD("EXIT\n");
+ return sbi->s_ucpi[0];
+}
diff --git a/fs/ufs/dir.c b/fs/ufs/dir.c
new file mode 100644
index 000000000..1bfe8cabf
--- /dev/null
+++ b/fs/ufs/dir.c
@@ -0,0 +1,662 @@
+/*
+ * linux/fs/ufs/ufs_dir.c
+ *
+ * Copyright (C) 1996
+ * Adrian Rodriguez (adrian@franklins-tower.rutgers.edu)
+ * Laboratory for Computer Science Research Computing Facility
+ * Rutgers, The State University of New Jersey
+ *
+ * swab support by Francois-Rene Rideau <fare@tunes.org> 19970406
+ *
+ * 4.4BSD (FreeBSD) support added on February 1st 1998 by
+ * Niels Kristian Bech Jensen <nkbj@image.dk> partially based
+ * on code by Martin von Loewis <martin@mira.isdn.cs.tu-berlin.de>.
+ *
+ * Migration to usage of "page cache" on May 2006 by
+ * Evgeniy Dushistov <dushistov@mail.ru> based on ext2 code base.
+ */
+
+#include <linux/time.h>
+#include <linux/fs.h>
+#include <linux/swap.h>
+
+#include "ufs_fs.h"
+#include "ufs.h"
+#include "swab.h"
+#include "util.h"
+
+/*
+ * NOTE! unlike strncmp, ufs_match returns 1 for success, 0 for failure.
+ *
+ * len <= UFS_MAXNAMLEN and de != NULL are guaranteed by caller.
+ */
+static inline int ufs_match(struct super_block *sb, int len,
+ const unsigned char *name, struct ufs_dir_entry *de)
+{
+ if (len != ufs_get_de_namlen(sb, de))
+ return 0;
+ if (!de->d_ino)
+ return 0;
+ return !memcmp(name, de->d_name, len);
+}
+
+static int ufs_commit_chunk(struct page *page, loff_t pos, unsigned len)
+{
+ struct address_space *mapping = page->mapping;
+ struct inode *dir = mapping->host;
+ int err = 0;
+
+ dir->i_version++;
+ block_write_end(NULL, mapping, pos, len, len, page, NULL);
+ if (pos+len > dir->i_size) {
+ i_size_write(dir, pos+len);
+ mark_inode_dirty(dir);
+ }
+ if (IS_DIRSYNC(dir))
+ err = write_one_page(page, 1);
+ else
+ unlock_page(page);
+ return err;
+}
+
+static inline void ufs_put_page(struct page *page)
+{
+ kunmap(page);
+ page_cache_release(page);
+}
+
+static inline unsigned long ufs_dir_pages(struct inode *inode)
+{
+ return (inode->i_size+PAGE_CACHE_SIZE-1)>>PAGE_CACHE_SHIFT;
+}
+
+ino_t ufs_inode_by_name(struct inode *dir, const struct qstr *qstr)
+{
+ ino_t res = 0;
+ struct ufs_dir_entry *de;
+ struct page *page;
+
+ de = ufs_find_entry(dir, qstr, &page);
+ if (de) {
+ res = fs32_to_cpu(dir->i_sb, de->d_ino);
+ ufs_put_page(page);
+ }
+ return res;
+}
+
+
+/* Releases the page */
+void ufs_set_link(struct inode *dir, struct ufs_dir_entry *de,
+ struct page *page, struct inode *inode)
+{
+ loff_t pos = page_offset(page) +
+ (char *) de - (char *) page_address(page);
+ unsigned len = fs16_to_cpu(dir->i_sb, de->d_reclen);
+ int err;
+
+ lock_page(page);
+ err = ufs_prepare_chunk(page, pos, len);
+ BUG_ON(err);
+
+ de->d_ino = cpu_to_fs32(dir->i_sb, inode->i_ino);
+ ufs_set_de_type(dir->i_sb, de, inode->i_mode);
+
+ err = ufs_commit_chunk(page, pos, len);
+ ufs_put_page(page);
+ dir->i_mtime = dir->i_ctime = CURRENT_TIME_SEC;
+ mark_inode_dirty(dir);
+}
+
+
+static void ufs_check_page(struct page *page)
+{
+ struct inode *dir = page->mapping->host;
+ struct super_block *sb = dir->i_sb;
+ char *kaddr = page_address(page);
+ unsigned offs, rec_len;
+ unsigned limit = PAGE_CACHE_SIZE;
+ const unsigned chunk_mask = UFS_SB(sb)->s_uspi->s_dirblksize - 1;
+ struct ufs_dir_entry *p;
+ char *error;
+
+ if ((dir->i_size >> PAGE_CACHE_SHIFT) == page->index) {
+ limit = dir->i_size & ~PAGE_CACHE_MASK;
+ if (limit & chunk_mask)
+ goto Ebadsize;
+ if (!limit)
+ goto out;
+ }
+ for (offs = 0; offs <= limit - UFS_DIR_REC_LEN(1); offs += rec_len) {
+ p = (struct ufs_dir_entry *)(kaddr + offs);
+ rec_len = fs16_to_cpu(sb, p->d_reclen);
+
+ if (rec_len < UFS_DIR_REC_LEN(1))
+ goto Eshort;
+ if (rec_len & 3)
+ goto Ealign;
+ if (rec_len < UFS_DIR_REC_LEN(ufs_get_de_namlen(sb, p)))
+ goto Enamelen;
+ if (((offs + rec_len - 1) ^ offs) & ~chunk_mask)
+ goto Espan;
+ if (fs32_to_cpu(sb, p->d_ino) > (UFS_SB(sb)->s_uspi->s_ipg *
+ UFS_SB(sb)->s_uspi->s_ncg))
+ goto Einumber;
+ }
+ if (offs != limit)
+ goto Eend;
+out:
+ SetPageChecked(page);
+ return;
+
+ /* Too bad, we had an error */
+
+Ebadsize:
+ ufs_error(sb, "ufs_check_page",
+ "size of directory #%lu is not a multiple of chunk size",
+ dir->i_ino
+ );
+ goto fail;
+Eshort:
+ error = "rec_len is smaller than minimal";
+ goto bad_entry;
+Ealign:
+ error = "unaligned directory entry";
+ goto bad_entry;
+Enamelen:
+ error = "rec_len is too small for name_len";
+ goto bad_entry;
+Espan:
+ error = "directory entry across blocks";
+ goto bad_entry;
+Einumber:
+ error = "inode out of bounds";
+bad_entry:
+ ufs_error (sb, "ufs_check_page", "bad entry in directory #%lu: %s - "
+ "offset=%lu, rec_len=%d, name_len=%d",
+ dir->i_ino, error, (page->index<<PAGE_CACHE_SHIFT)+offs,
+ rec_len, ufs_get_de_namlen(sb, p));
+ goto fail;
+Eend:
+ p = (struct ufs_dir_entry *)(kaddr + offs);
+ ufs_error(sb, __func__,
+ "entry in directory #%lu spans the page boundary"
+ "offset=%lu",
+ dir->i_ino, (page->index<<PAGE_CACHE_SHIFT)+offs);
+fail:
+ SetPageChecked(page);
+ SetPageError(page);
+}
+
+static struct page *ufs_get_page(struct inode *dir, unsigned long n)
+{
+ struct address_space *mapping = dir->i_mapping;
+ struct page *page = read_mapping_page(mapping, n, NULL);
+ if (!IS_ERR(page)) {
+ kmap(page);
+ if (!PageChecked(page))
+ ufs_check_page(page);
+ if (PageError(page))
+ goto fail;
+ }
+ return page;
+
+fail:
+ ufs_put_page(page);
+ return ERR_PTR(-EIO);
+}
+
+/*
+ * Return the offset into page `page_nr' of the last valid
+ * byte in that page, plus one.
+ */
+static unsigned
+ufs_last_byte(struct inode *inode, unsigned long page_nr)
+{
+ unsigned last_byte = inode->i_size;
+
+ last_byte -= page_nr << PAGE_CACHE_SHIFT;
+ if (last_byte > PAGE_CACHE_SIZE)
+ last_byte = PAGE_CACHE_SIZE;
+ return last_byte;
+}
+
+static inline struct ufs_dir_entry *
+ufs_next_entry(struct super_block *sb, struct ufs_dir_entry *p)
+{
+ return (struct ufs_dir_entry *)((char *)p +
+ fs16_to_cpu(sb, p->d_reclen));
+}
+
+struct ufs_dir_entry *ufs_dotdot(struct inode *dir, struct page **p)
+{
+ struct page *page = ufs_get_page(dir, 0);
+ struct ufs_dir_entry *de = NULL;
+
+ if (!IS_ERR(page)) {
+ de = ufs_next_entry(dir->i_sb,
+ (struct ufs_dir_entry *)page_address(page));
+ *p = page;
+ }
+ return de;
+}
+
+/*
+ * ufs_find_entry()
+ *
+ * finds an entry in the specified directory with the wanted name. It
+ * returns the page in which the entry was found, and the entry itself
+ * (as a parameter - res_dir). Page is returned mapped and unlocked.
+ * Entry is guaranteed to be valid.
+ */
+struct ufs_dir_entry *ufs_find_entry(struct inode *dir, const struct qstr *qstr,
+ struct page **res_page)
+{
+ struct super_block *sb = dir->i_sb;
+ const unsigned char *name = qstr->name;
+ int namelen = qstr->len;
+ unsigned reclen = UFS_DIR_REC_LEN(namelen);
+ unsigned long start, n;
+ unsigned long npages = ufs_dir_pages(dir);
+ struct page *page = NULL;
+ struct ufs_inode_info *ui = UFS_I(dir);
+ struct ufs_dir_entry *de;
+
+ UFSD("ENTER, dir_ino %lu, name %s, namlen %u\n", dir->i_ino, name, namelen);
+
+ if (npages == 0 || namelen > UFS_MAXNAMLEN)
+ goto out;
+
+ /* OFFSET_CACHE */
+ *res_page = NULL;
+
+ start = ui->i_dir_start_lookup;
+
+ if (start >= npages)
+ start = 0;
+ n = start;
+ do {
+ char *kaddr;
+ page = ufs_get_page(dir, n);
+ if (!IS_ERR(page)) {
+ kaddr = page_address(page);
+ de = (struct ufs_dir_entry *) kaddr;
+ kaddr += ufs_last_byte(dir, n) - reclen;
+ while ((char *) de <= kaddr) {
+ if (de->d_reclen == 0) {
+ ufs_error(dir->i_sb, __func__,
+ "zero-length directory entry");
+ ufs_put_page(page);
+ goto out;
+ }
+ if (ufs_match(sb, namelen, name, de))
+ goto found;
+ de = ufs_next_entry(sb, de);
+ }
+ ufs_put_page(page);
+ }
+ if (++n >= npages)
+ n = 0;
+ } while (n != start);
+out:
+ return NULL;
+
+found:
+ *res_page = page;
+ ui->i_dir_start_lookup = n;
+ return de;
+}
+
+/*
+ * Parent is locked.
+ */
+int ufs_add_link(struct dentry *dentry, struct inode *inode)
+{
+ struct inode *dir = d_inode(dentry->d_parent);
+ const unsigned char *name = dentry->d_name.name;
+ int namelen = dentry->d_name.len;
+ struct super_block *sb = dir->i_sb;
+ unsigned reclen = UFS_DIR_REC_LEN(namelen);
+ const unsigned int chunk_size = UFS_SB(sb)->s_uspi->s_dirblksize;
+ unsigned short rec_len, name_len;
+ struct page *page = NULL;
+ struct ufs_dir_entry *de;
+ unsigned long npages = ufs_dir_pages(dir);
+ unsigned long n;
+ char *kaddr;
+ loff_t pos;
+ int err;
+
+ UFSD("ENTER, name %s, namelen %u\n", name, namelen);
+
+ /*
+ * We take care of directory expansion in the same loop.
+ * This code plays outside i_size, so it locks the page
+ * to protect that region.
+ */
+ for (n = 0; n <= npages; n++) {
+ char *dir_end;
+
+ page = ufs_get_page(dir, n);
+ err = PTR_ERR(page);
+ if (IS_ERR(page))
+ goto out;
+ lock_page(page);
+ kaddr = page_address(page);
+ dir_end = kaddr + ufs_last_byte(dir, n);
+ de = (struct ufs_dir_entry *)kaddr;
+ kaddr += PAGE_CACHE_SIZE - reclen;
+ while ((char *)de <= kaddr) {
+ if ((char *)de == dir_end) {
+ /* We hit i_size */
+ name_len = 0;
+ rec_len = chunk_size;
+ de->d_reclen = cpu_to_fs16(sb, chunk_size);
+ de->d_ino = 0;
+ goto got_it;
+ }
+ if (de->d_reclen == 0) {
+ ufs_error(dir->i_sb, __func__,
+ "zero-length directory entry");
+ err = -EIO;
+ goto out_unlock;
+ }
+ err = -EEXIST;
+ if (ufs_match(sb, namelen, name, de))
+ goto out_unlock;
+ name_len = UFS_DIR_REC_LEN(ufs_get_de_namlen(sb, de));
+ rec_len = fs16_to_cpu(sb, de->d_reclen);
+ if (!de->d_ino && rec_len >= reclen)
+ goto got_it;
+ if (rec_len >= name_len + reclen)
+ goto got_it;
+ de = (struct ufs_dir_entry *) ((char *) de + rec_len);
+ }
+ unlock_page(page);
+ ufs_put_page(page);
+ }
+ BUG();
+ return -EINVAL;
+
+got_it:
+ pos = page_offset(page) +
+ (char*)de - (char*)page_address(page);
+ err = ufs_prepare_chunk(page, pos, rec_len);
+ if (err)
+ goto out_unlock;
+ if (de->d_ino) {
+ struct ufs_dir_entry *de1 =
+ (struct ufs_dir_entry *) ((char *) de + name_len);
+ de1->d_reclen = cpu_to_fs16(sb, rec_len - name_len);
+ de->d_reclen = cpu_to_fs16(sb, name_len);
+
+ de = de1;
+ }
+
+ ufs_set_de_namlen(sb, de, namelen);
+ memcpy(de->d_name, name, namelen + 1);
+ de->d_ino = cpu_to_fs32(sb, inode->i_ino);
+ ufs_set_de_type(sb, de, inode->i_mode);
+
+ err = ufs_commit_chunk(page, pos, rec_len);
+ dir->i_mtime = dir->i_ctime = CURRENT_TIME_SEC;
+
+ mark_inode_dirty(dir);
+ /* OFFSET_CACHE */
+out_put:
+ ufs_put_page(page);
+out:
+ return err;
+out_unlock:
+ unlock_page(page);
+ goto out_put;
+}
+
+static inline unsigned
+ufs_validate_entry(struct super_block *sb, char *base,
+ unsigned offset, unsigned mask)
+{
+ struct ufs_dir_entry *de = (struct ufs_dir_entry*)(base + offset);
+ struct ufs_dir_entry *p = (struct ufs_dir_entry*)(base + (offset&mask));
+ while ((char*)p < (char*)de) {
+ if (p->d_reclen == 0)
+ break;
+ p = ufs_next_entry(sb, p);
+ }
+ return (char *)p - base;
+}
+
+
+/*
+ * This is blatantly stolen from ext2fs
+ */
+static int
+ufs_readdir(struct file *file, struct dir_context *ctx)
+{
+ loff_t pos = ctx->pos;
+ struct inode *inode = file_inode(file);
+ struct super_block *sb = inode->i_sb;
+ unsigned int offset = pos & ~PAGE_CACHE_MASK;
+ unsigned long n = pos >> PAGE_CACHE_SHIFT;
+ unsigned long npages = ufs_dir_pages(inode);
+ unsigned chunk_mask = ~(UFS_SB(sb)->s_uspi->s_dirblksize - 1);
+ int need_revalidate = file->f_version != inode->i_version;
+ unsigned flags = UFS_SB(sb)->s_flags;
+
+ UFSD("BEGIN\n");
+
+ if (pos > inode->i_size - UFS_DIR_REC_LEN(1))
+ return 0;
+
+ for ( ; n < npages; n++, offset = 0) {
+ char *kaddr, *limit;
+ struct ufs_dir_entry *de;
+
+ struct page *page = ufs_get_page(inode, n);
+
+ if (IS_ERR(page)) {
+ ufs_error(sb, __func__,
+ "bad page in #%lu",
+ inode->i_ino);
+ ctx->pos += PAGE_CACHE_SIZE - offset;
+ return -EIO;
+ }
+ kaddr = page_address(page);
+ if (unlikely(need_revalidate)) {
+ if (offset) {
+ offset = ufs_validate_entry(sb, kaddr, offset, chunk_mask);
+ ctx->pos = (n<<PAGE_CACHE_SHIFT) + offset;
+ }
+ file->f_version = inode->i_version;
+ need_revalidate = 0;
+ }
+ de = (struct ufs_dir_entry *)(kaddr+offset);
+ limit = kaddr + ufs_last_byte(inode, n) - UFS_DIR_REC_LEN(1);
+ for ( ;(char*)de <= limit; de = ufs_next_entry(sb, de)) {
+ if (de->d_reclen == 0) {
+ ufs_error(sb, __func__,
+ "zero-length directory entry");
+ ufs_put_page(page);
+ return -EIO;
+ }
+ if (de->d_ino) {
+ unsigned char d_type = DT_UNKNOWN;
+
+ UFSD("filldir(%s,%u)\n", de->d_name,
+ fs32_to_cpu(sb, de->d_ino));
+ UFSD("namlen %u\n", ufs_get_de_namlen(sb, de));
+
+ if ((flags & UFS_DE_MASK) == UFS_DE_44BSD)
+ d_type = de->d_u.d_44.d_type;
+
+ if (!dir_emit(ctx, de->d_name,
+ ufs_get_de_namlen(sb, de),
+ fs32_to_cpu(sb, de->d_ino),
+ d_type)) {
+ ufs_put_page(page);
+ return 0;
+ }
+ }
+ ctx->pos += fs16_to_cpu(sb, de->d_reclen);
+ }
+ ufs_put_page(page);
+ }
+ return 0;
+}
+
+
+/*
+ * ufs_delete_entry deletes a directory entry by merging it with the
+ * previous entry.
+ */
+int ufs_delete_entry(struct inode *inode, struct ufs_dir_entry *dir,
+ struct page * page)
+{
+ struct super_block *sb = inode->i_sb;
+ char *kaddr = page_address(page);
+ unsigned from = ((char*)dir - kaddr) & ~(UFS_SB(sb)->s_uspi->s_dirblksize - 1);
+ unsigned to = ((char*)dir - kaddr) + fs16_to_cpu(sb, dir->d_reclen);
+ loff_t pos;
+ struct ufs_dir_entry *pde = NULL;
+ struct ufs_dir_entry *de = (struct ufs_dir_entry *) (kaddr + from);
+ int err;
+
+ UFSD("ENTER\n");
+
+ UFSD("ino %u, reclen %u, namlen %u, name %s\n",
+ fs32_to_cpu(sb, de->d_ino),
+ fs16_to_cpu(sb, de->d_reclen),
+ ufs_get_de_namlen(sb, de), de->d_name);
+
+ while ((char*)de < (char*)dir) {
+ if (de->d_reclen == 0) {
+ ufs_error(inode->i_sb, __func__,
+ "zero-length directory entry");
+ err = -EIO;
+ goto out;
+ }
+ pde = de;
+ de = ufs_next_entry(sb, de);
+ }
+ if (pde)
+ from = (char*)pde - (char*)page_address(page);
+
+ pos = page_offset(page) + from;
+ lock_page(page);
+ err = ufs_prepare_chunk(page, pos, to - from);
+ BUG_ON(err);
+ if (pde)
+ pde->d_reclen = cpu_to_fs16(sb, to - from);
+ dir->d_ino = 0;
+ err = ufs_commit_chunk(page, pos, to - from);
+ inode->i_ctime = inode->i_mtime = CURRENT_TIME_SEC;
+ mark_inode_dirty(inode);
+out:
+ ufs_put_page(page);
+ UFSD("EXIT\n");
+ return err;
+}
+
+int ufs_make_empty(struct inode * inode, struct inode *dir)
+{
+ struct super_block * sb = dir->i_sb;
+ struct address_space *mapping = inode->i_mapping;
+ struct page *page = grab_cache_page(mapping, 0);
+ const unsigned int chunk_size = UFS_SB(sb)->s_uspi->s_dirblksize;
+ struct ufs_dir_entry * de;
+ char *base;
+ int err;
+
+ if (!page)
+ return -ENOMEM;
+
+ err = ufs_prepare_chunk(page, 0, chunk_size);
+ if (err) {
+ unlock_page(page);
+ goto fail;
+ }
+
+ kmap(page);
+ base = (char*)page_address(page);
+ memset(base, 0, PAGE_CACHE_SIZE);
+
+ de = (struct ufs_dir_entry *) base;
+
+ de->d_ino = cpu_to_fs32(sb, inode->i_ino);
+ ufs_set_de_type(sb, de, inode->i_mode);
+ ufs_set_de_namlen(sb, de, 1);
+ de->d_reclen = cpu_to_fs16(sb, UFS_DIR_REC_LEN(1));
+ strcpy (de->d_name, ".");
+ de = (struct ufs_dir_entry *)
+ ((char *)de + fs16_to_cpu(sb, de->d_reclen));
+ de->d_ino = cpu_to_fs32(sb, dir->i_ino);
+ ufs_set_de_type(sb, de, dir->i_mode);
+ de->d_reclen = cpu_to_fs16(sb, chunk_size - UFS_DIR_REC_LEN(1));
+ ufs_set_de_namlen(sb, de, 2);
+ strcpy (de->d_name, "..");
+ kunmap(page);
+
+ err = ufs_commit_chunk(page, 0, chunk_size);
+fail:
+ page_cache_release(page);
+ return err;
+}
+
+/*
+ * routine to check that the specified directory is empty (for rmdir)
+ */
+int ufs_empty_dir(struct inode * inode)
+{
+ struct super_block *sb = inode->i_sb;
+ struct page *page = NULL;
+ unsigned long i, npages = ufs_dir_pages(inode);
+
+ for (i = 0; i < npages; i++) {
+ char *kaddr;
+ struct ufs_dir_entry *de;
+ page = ufs_get_page(inode, i);
+
+ if (IS_ERR(page))
+ continue;
+
+ kaddr = page_address(page);
+ de = (struct ufs_dir_entry *)kaddr;
+ kaddr += ufs_last_byte(inode, i) - UFS_DIR_REC_LEN(1);
+
+ while ((char *)de <= kaddr) {
+ if (de->d_reclen == 0) {
+ ufs_error(inode->i_sb, __func__,
+ "zero-length directory entry: "
+ "kaddr=%p, de=%p\n", kaddr, de);
+ goto not_empty;
+ }
+ if (de->d_ino) {
+ u16 namelen=ufs_get_de_namlen(sb, de);
+ /* check for . and .. */
+ if (de->d_name[0] != '.')
+ goto not_empty;
+ if (namelen > 2)
+ goto not_empty;
+ if (namelen < 2) {
+ if (inode->i_ino !=
+ fs32_to_cpu(sb, de->d_ino))
+ goto not_empty;
+ } else if (de->d_name[1] != '.')
+ goto not_empty;
+ }
+ de = ufs_next_entry(sb, de);
+ }
+ ufs_put_page(page);
+ }
+ return 1;
+
+not_empty:
+ ufs_put_page(page);
+ return 0;
+}
+
+const struct file_operations ufs_dir_operations = {
+ .read = generic_read_dir,
+ .iterate = ufs_readdir,
+ .fsync = generic_file_fsync,
+ .llseek = generic_file_llseek,
+};
diff --git a/fs/ufs/file.c b/fs/ufs/file.c
new file mode 100644
index 000000000..042ddbf11
--- /dev/null
+++ b/fs/ufs/file.c
@@ -0,0 +1,44 @@
+/*
+ * linux/fs/ufs/file.c
+ *
+ * Copyright (C) 1998
+ * Daniel Pirkl <daniel.pirkl@email.cz>
+ * Charles University, Faculty of Mathematics and Physics
+ *
+ * from
+ *
+ * linux/fs/ext2/file.c
+ *
+ * Copyright (C) 1992, 1993, 1994, 1995
+ * Remy Card (card@masi.ibp.fr)
+ * Laboratoire MASI - Institut Blaise Pascal
+ * Universite Pierre et Marie Curie (Paris VI)
+ *
+ * from
+ *
+ * linux/fs/minix/file.c
+ *
+ * Copyright (C) 1991, 1992 Linus Torvalds
+ *
+ * ext2 fs regular file handling primitives
+ */
+
+#include <linux/fs.h>
+
+#include "ufs_fs.h"
+#include "ufs.h"
+
+/*
+ * We have mostly NULL's here: the current defaults are ok for
+ * the ufs filesystem.
+ */
+
+const struct file_operations ufs_file_operations = {
+ .llseek = generic_file_llseek,
+ .read_iter = generic_file_read_iter,
+ .write_iter = generic_file_write_iter,
+ .mmap = generic_file_mmap,
+ .open = generic_file_open,
+ .fsync = generic_file_fsync,
+ .splice_read = generic_file_splice_read,
+};
diff --git a/fs/ufs/ialloc.c b/fs/ufs/ialloc.c
new file mode 100644
index 000000000..fd0203ce1
--- /dev/null
+++ b/fs/ufs/ialloc.c
@@ -0,0 +1,353 @@
+/*
+ * linux/fs/ufs/ialloc.c
+ *
+ * Copyright (c) 1998
+ * Daniel Pirkl <daniel.pirkl@email.cz>
+ * Charles University, Faculty of Mathematics and Physics
+ *
+ * from
+ *
+ * linux/fs/ext2/ialloc.c
+ *
+ * Copyright (C) 1992, 1993, 1994, 1995
+ * Remy Card (card@masi.ibp.fr)
+ * Laboratoire MASI - Institut Blaise Pascal
+ * Universite Pierre et Marie Curie (Paris VI)
+ *
+ * BSD ufs-inspired inode and directory allocation by
+ * Stephen Tweedie (sct@dcs.ed.ac.uk), 1993
+ * Big-endian to little-endian byte-swapping/bitmaps by
+ * David S. Miller (davem@caip.rutgers.edu), 1995
+ *
+ * UFS2 write support added by
+ * Evgeniy Dushistov <dushistov@mail.ru>, 2007
+ */
+
+#include <linux/fs.h>
+#include <linux/time.h>
+#include <linux/stat.h>
+#include <linux/string.h>
+#include <linux/buffer_head.h>
+#include <linux/sched.h>
+#include <linux/bitops.h>
+#include <asm/byteorder.h>
+
+#include "ufs_fs.h"
+#include "ufs.h"
+#include "swab.h"
+#include "util.h"
+
+/*
+ * NOTE! When we get the inode, we're the only people
+ * that have access to it, and as such there are no
+ * race conditions we have to worry about. The inode
+ * is not on the hash-lists, and it cannot be reached
+ * through the filesystem because the directory entry
+ * has been deleted earlier.
+ *
+ * HOWEVER: we must make sure that we get no aliases,
+ * which means that we have to call "clear_inode()"
+ * _before_ we mark the inode not in use in the inode
+ * bitmaps. Otherwise a newly created file might use
+ * the same inode number (not actually the same pointer
+ * though), and then we'd have two inodes sharing the
+ * same inode number and space on the harddisk.
+ */
+void ufs_free_inode (struct inode * inode)
+{
+ struct super_block * sb;
+ struct ufs_sb_private_info * uspi;
+ struct ufs_cg_private_info * ucpi;
+ struct ufs_cylinder_group * ucg;
+ int is_directory;
+ unsigned ino, cg, bit;
+
+ UFSD("ENTER, ino %lu\n", inode->i_ino);
+
+ sb = inode->i_sb;
+ uspi = UFS_SB(sb)->s_uspi;
+
+ ino = inode->i_ino;
+
+ mutex_lock(&UFS_SB(sb)->s_lock);
+
+ if (!((ino > 1) && (ino < (uspi->s_ncg * uspi->s_ipg )))) {
+ ufs_warning(sb, "ufs_free_inode", "reserved inode or nonexistent inode %u\n", ino);
+ mutex_unlock(&UFS_SB(sb)->s_lock);
+ return;
+ }
+
+ cg = ufs_inotocg (ino);
+ bit = ufs_inotocgoff (ino);
+ ucpi = ufs_load_cylinder (sb, cg);
+ if (!ucpi) {
+ mutex_unlock(&UFS_SB(sb)->s_lock);
+ return;
+ }
+ ucg = ubh_get_ucg(UCPI_UBH(ucpi));
+ if (!ufs_cg_chkmagic(sb, ucg))
+ ufs_panic (sb, "ufs_free_fragments", "internal error, bad cg magic number");
+
+ ucg->cg_time = cpu_to_fs32(sb, get_seconds());
+
+ is_directory = S_ISDIR(inode->i_mode);
+
+ if (ubh_isclr (UCPI_UBH(ucpi), ucpi->c_iusedoff, bit))
+ ufs_error(sb, "ufs_free_inode", "bit already cleared for inode %u", ino);
+ else {
+ ubh_clrbit (UCPI_UBH(ucpi), ucpi->c_iusedoff, bit);
+ if (ino < ucpi->c_irotor)
+ ucpi->c_irotor = ino;
+ fs32_add(sb, &ucg->cg_cs.cs_nifree, 1);
+ uspi->cs_total.cs_nifree++;
+ fs32_add(sb, &UFS_SB(sb)->fs_cs(cg).cs_nifree, 1);
+
+ if (is_directory) {
+ fs32_sub(sb, &ucg->cg_cs.cs_ndir, 1);
+ uspi->cs_total.cs_ndir--;
+ fs32_sub(sb, &UFS_SB(sb)->fs_cs(cg).cs_ndir, 1);
+ }
+ }
+
+ ubh_mark_buffer_dirty (USPI_UBH(uspi));
+ ubh_mark_buffer_dirty (UCPI_UBH(ucpi));
+ if (sb->s_flags & MS_SYNCHRONOUS)
+ ubh_sync_block(UCPI_UBH(ucpi));
+
+ ufs_mark_sb_dirty(sb);
+ mutex_unlock(&UFS_SB(sb)->s_lock);
+ UFSD("EXIT\n");
+}
+
+/*
+ * Nullify new chunk of inodes,
+ * BSD people also set ui_gen field of inode
+ * during nullification, but we not care about
+ * that because of linux ufs do not support NFS
+ */
+static void ufs2_init_inodes_chunk(struct super_block *sb,
+ struct ufs_cg_private_info *ucpi,
+ struct ufs_cylinder_group *ucg)
+{
+ struct buffer_head *bh;
+ struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
+ sector_t beg = uspi->s_sbbase +
+ ufs_inotofsba(ucpi->c_cgx * uspi->s_ipg +
+ fs32_to_cpu(sb, ucg->cg_u.cg_u2.cg_initediblk));
+ sector_t end = beg + uspi->s_fpb;
+
+ UFSD("ENTER cgno %d\n", ucpi->c_cgx);
+
+ for (; beg < end; ++beg) {
+ bh = sb_getblk(sb, beg);
+ lock_buffer(bh);
+ memset(bh->b_data, 0, sb->s_blocksize);
+ set_buffer_uptodate(bh);
+ mark_buffer_dirty(bh);
+ unlock_buffer(bh);
+ if (sb->s_flags & MS_SYNCHRONOUS)
+ sync_dirty_buffer(bh);
+ brelse(bh);
+ }
+
+ fs32_add(sb, &ucg->cg_u.cg_u2.cg_initediblk, uspi->s_inopb);
+ ubh_mark_buffer_dirty(UCPI_UBH(ucpi));
+ if (sb->s_flags & MS_SYNCHRONOUS)
+ ubh_sync_block(UCPI_UBH(ucpi));
+
+ UFSD("EXIT\n");
+}
+
+/*
+ * There are two policies for allocating an inode. If the new inode is
+ * a directory, then a forward search is made for a block group with both
+ * free space and a low directory-to-inode ratio; if that fails, then of
+ * the groups with above-average free space, that group with the fewest
+ * directories already is chosen.
+ *
+ * For other inodes, search forward from the parent directory's block
+ * group to find a free inode.
+ */
+struct inode *ufs_new_inode(struct inode *dir, umode_t mode)
+{
+ struct super_block * sb;
+ struct ufs_sb_info * sbi;
+ struct ufs_sb_private_info * uspi;
+ struct ufs_cg_private_info * ucpi;
+ struct ufs_cylinder_group * ucg;
+ struct inode * inode;
+ unsigned cg, bit, i, j, start;
+ struct ufs_inode_info *ufsi;
+ int err = -ENOSPC;
+
+ UFSD("ENTER\n");
+
+ /* Cannot create files in a deleted directory */
+ if (!dir || !dir->i_nlink)
+ return ERR_PTR(-EPERM);
+ sb = dir->i_sb;
+ inode = new_inode(sb);
+ if (!inode)
+ return ERR_PTR(-ENOMEM);
+ ufsi = UFS_I(inode);
+ sbi = UFS_SB(sb);
+ uspi = sbi->s_uspi;
+
+ mutex_lock(&sbi->s_lock);
+
+ /*
+ * Try to place the inode in its parent directory
+ */
+ i = ufs_inotocg(dir->i_ino);
+ if (sbi->fs_cs(i).cs_nifree) {
+ cg = i;
+ goto cg_found;
+ }
+
+ /*
+ * Use a quadratic hash to find a group with a free inode
+ */
+ for ( j = 1; j < uspi->s_ncg; j <<= 1 ) {
+ i += j;
+ if (i >= uspi->s_ncg)
+ i -= uspi->s_ncg;
+ if (sbi->fs_cs(i).cs_nifree) {
+ cg = i;
+ goto cg_found;
+ }
+ }
+
+ /*
+ * That failed: try linear search for a free inode
+ */
+ i = ufs_inotocg(dir->i_ino) + 1;
+ for (j = 2; j < uspi->s_ncg; j++) {
+ i++;
+ if (i >= uspi->s_ncg)
+ i = 0;
+ if (sbi->fs_cs(i).cs_nifree) {
+ cg = i;
+ goto cg_found;
+ }
+ }
+
+ goto failed;
+
+cg_found:
+ ucpi = ufs_load_cylinder (sb, cg);
+ if (!ucpi) {
+ err = -EIO;
+ goto failed;
+ }
+ ucg = ubh_get_ucg(UCPI_UBH(ucpi));
+ if (!ufs_cg_chkmagic(sb, ucg))
+ ufs_panic (sb, "ufs_new_inode", "internal error, bad cg magic number");
+
+ start = ucpi->c_irotor;
+ bit = ubh_find_next_zero_bit (UCPI_UBH(ucpi), ucpi->c_iusedoff, uspi->s_ipg, start);
+ if (!(bit < uspi->s_ipg)) {
+ bit = ubh_find_first_zero_bit (UCPI_UBH(ucpi), ucpi->c_iusedoff, start);
+ if (!(bit < start)) {
+ ufs_error (sb, "ufs_new_inode",
+ "cylinder group %u corrupted - error in inode bitmap\n", cg);
+ err = -EIO;
+ goto failed;
+ }
+ }
+ UFSD("start = %u, bit = %u, ipg = %u\n", start, bit, uspi->s_ipg);
+ if (ubh_isclr (UCPI_UBH(ucpi), ucpi->c_iusedoff, bit))
+ ubh_setbit (UCPI_UBH(ucpi), ucpi->c_iusedoff, bit);
+ else {
+ ufs_panic (sb, "ufs_new_inode", "internal error");
+ err = -EIO;
+ goto failed;
+ }
+
+ if (uspi->fs_magic == UFS2_MAGIC) {
+ u32 initediblk = fs32_to_cpu(sb, ucg->cg_u.cg_u2.cg_initediblk);
+
+ if (bit + uspi->s_inopb > initediblk &&
+ initediblk < fs32_to_cpu(sb, ucg->cg_u.cg_u2.cg_niblk))
+ ufs2_init_inodes_chunk(sb, ucpi, ucg);
+ }
+
+ fs32_sub(sb, &ucg->cg_cs.cs_nifree, 1);
+ uspi->cs_total.cs_nifree--;
+ fs32_sub(sb, &sbi->fs_cs(cg).cs_nifree, 1);
+
+ if (S_ISDIR(mode)) {
+ fs32_add(sb, &ucg->cg_cs.cs_ndir, 1);
+ uspi->cs_total.cs_ndir++;
+ fs32_add(sb, &sbi->fs_cs(cg).cs_ndir, 1);
+ }
+ ubh_mark_buffer_dirty (USPI_UBH(uspi));
+ ubh_mark_buffer_dirty (UCPI_UBH(ucpi));
+ if (sb->s_flags & MS_SYNCHRONOUS)
+ ubh_sync_block(UCPI_UBH(ucpi));
+ ufs_mark_sb_dirty(sb);
+
+ inode->i_ino = cg * uspi->s_ipg + bit;
+ inode_init_owner(inode, dir, mode);
+ inode->i_blocks = 0;
+ inode->i_generation = 0;
+ inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME_SEC;
+ ufsi->i_flags = UFS_I(dir)->i_flags;
+ ufsi->i_lastfrag = 0;
+ ufsi->i_shadow = 0;
+ ufsi->i_osync = 0;
+ ufsi->i_oeftflag = 0;
+ ufsi->i_dir_start_lookup = 0;
+ memset(&ufsi->i_u1, 0, sizeof(ufsi->i_u1));
+ if (insert_inode_locked(inode) < 0) {
+ err = -EIO;
+ goto failed;
+ }
+ mark_inode_dirty(inode);
+
+ if (uspi->fs_magic == UFS2_MAGIC) {
+ struct buffer_head *bh;
+ struct ufs2_inode *ufs2_inode;
+
+ /*
+ * setup birth date, we do it here because of there is no sense
+ * to hold it in struct ufs_inode_info, and lose 64 bit
+ */
+ bh = sb_bread(sb, uspi->s_sbbase + ufs_inotofsba(inode->i_ino));
+ if (!bh) {
+ ufs_warning(sb, "ufs_read_inode",
+ "unable to read inode %lu\n",
+ inode->i_ino);
+ err = -EIO;
+ goto fail_remove_inode;
+ }
+ lock_buffer(bh);
+ ufs2_inode = (struct ufs2_inode *)bh->b_data;
+ ufs2_inode += ufs_inotofsbo(inode->i_ino);
+ ufs2_inode->ui_birthtime = cpu_to_fs64(sb, CURRENT_TIME.tv_sec);
+ ufs2_inode->ui_birthnsec = cpu_to_fs32(sb, CURRENT_TIME.tv_nsec);
+ mark_buffer_dirty(bh);
+ unlock_buffer(bh);
+ if (sb->s_flags & MS_SYNCHRONOUS)
+ sync_dirty_buffer(bh);
+ brelse(bh);
+ }
+ mutex_unlock(&sbi->s_lock);
+
+ UFSD("allocating inode %lu\n", inode->i_ino);
+ UFSD("EXIT\n");
+ return inode;
+
+fail_remove_inode:
+ mutex_unlock(&sbi->s_lock);
+ clear_nlink(inode);
+ unlock_new_inode(inode);
+ iput(inode);
+ UFSD("EXIT (FAILED): err %d\n", err);
+ return ERR_PTR(err);
+failed:
+ mutex_unlock(&sbi->s_lock);
+ make_bad_inode(inode);
+ iput (inode);
+ UFSD("EXIT (FAILED): err %d\n", err);
+ return ERR_PTR(err);
+}
diff --git a/fs/ufs/inode.c b/fs/ufs/inode.c
new file mode 100644
index 000000000..2d93ab07d
--- /dev/null
+++ b/fs/ufs/inode.c
@@ -0,0 +1,910 @@
+/*
+ * linux/fs/ufs/inode.c
+ *
+ * Copyright (C) 1998
+ * Daniel Pirkl <daniel.pirkl@email.cz>
+ * Charles University, Faculty of Mathematics and Physics
+ *
+ * from
+ *
+ * linux/fs/ext2/inode.c
+ *
+ * Copyright (C) 1992, 1993, 1994, 1995
+ * Remy Card (card@masi.ibp.fr)
+ * Laboratoire MASI - Institut Blaise Pascal
+ * Universite Pierre et Marie Curie (Paris VI)
+ *
+ * from
+ *
+ * linux/fs/minix/inode.c
+ *
+ * Copyright (C) 1991, 1992 Linus Torvalds
+ *
+ * Goal-directed block allocation by Stephen Tweedie (sct@dcs.ed.ac.uk), 1993
+ * Big-endian to little-endian byte-swapping/bitmaps by
+ * David S. Miller (davem@caip.rutgers.edu), 1995
+ */
+
+#include <asm/uaccess.h>
+
+#include <linux/errno.h>
+#include <linux/fs.h>
+#include <linux/time.h>
+#include <linux/stat.h>
+#include <linux/string.h>
+#include <linux/mm.h>
+#include <linux/buffer_head.h>
+#include <linux/writeback.h>
+
+#include "ufs_fs.h"
+#include "ufs.h"
+#include "swab.h"
+#include "util.h"
+
+static u64 ufs_frag_map(struct inode *inode, sector_t frag, bool needs_lock);
+
+static int ufs_block_to_path(struct inode *inode, sector_t i_block, sector_t offsets[4])
+{
+ struct ufs_sb_private_info *uspi = UFS_SB(inode->i_sb)->s_uspi;
+ int ptrs = uspi->s_apb;
+ int ptrs_bits = uspi->s_apbshift;
+ const long direct_blocks = UFS_NDADDR,
+ indirect_blocks = ptrs,
+ double_blocks = (1 << (ptrs_bits * 2));
+ int n = 0;
+
+
+ UFSD("ptrs=uspi->s_apb = %d,double_blocks=%ld \n",ptrs,double_blocks);
+ if (i_block < direct_blocks) {
+ offsets[n++] = i_block;
+ } else if ((i_block -= direct_blocks) < indirect_blocks) {
+ offsets[n++] = UFS_IND_BLOCK;
+ offsets[n++] = i_block;
+ } else if ((i_block -= indirect_blocks) < double_blocks) {
+ offsets[n++] = UFS_DIND_BLOCK;
+ offsets[n++] = i_block >> ptrs_bits;
+ offsets[n++] = i_block & (ptrs - 1);
+ } else if (((i_block -= double_blocks) >> (ptrs_bits * 2)) < ptrs) {
+ offsets[n++] = UFS_TIND_BLOCK;
+ offsets[n++] = i_block >> (ptrs_bits * 2);
+ offsets[n++] = (i_block >> ptrs_bits) & (ptrs - 1);
+ offsets[n++] = i_block & (ptrs - 1);
+ } else {
+ ufs_warning(inode->i_sb, "ufs_block_to_path", "block > big");
+ }
+ return n;
+}
+
+/*
+ * Returns the location of the fragment from
+ * the beginning of the filesystem.
+ */
+
+static u64 ufs_frag_map(struct inode *inode, sector_t frag, bool needs_lock)
+{
+ struct ufs_inode_info *ufsi = UFS_I(inode);
+ struct super_block *sb = inode->i_sb;
+ struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
+ u64 mask = (u64) uspi->s_apbmask>>uspi->s_fpbshift;
+ int shift = uspi->s_apbshift-uspi->s_fpbshift;
+ sector_t offsets[4], *p;
+ int depth = ufs_block_to_path(inode, frag >> uspi->s_fpbshift, offsets);
+ u64 ret = 0L;
+ __fs32 block;
+ __fs64 u2_block = 0L;
+ unsigned flags = UFS_SB(sb)->s_flags;
+ u64 temp = 0L;
+
+ UFSD(": frag = %llu depth = %d\n", (unsigned long long)frag, depth);
+ UFSD(": uspi->s_fpbshift = %d ,uspi->s_apbmask = %x, mask=%llx\n",
+ uspi->s_fpbshift, uspi->s_apbmask,
+ (unsigned long long)mask);
+
+ if (depth == 0)
+ return 0;
+
+ p = offsets;
+
+ if (needs_lock)
+ lock_ufs(sb);
+ if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
+ goto ufs2;
+
+ block = ufsi->i_u1.i_data[*p++];
+ if (!block)
+ goto out;
+ while (--depth) {
+ struct buffer_head *bh;
+ sector_t n = *p++;
+
+ bh = sb_bread(sb, uspi->s_sbbase + fs32_to_cpu(sb, block)+(n>>shift));
+ if (!bh)
+ goto out;
+ block = ((__fs32 *) bh->b_data)[n & mask];
+ brelse (bh);
+ if (!block)
+ goto out;
+ }
+ ret = (u64) (uspi->s_sbbase + fs32_to_cpu(sb, block) + (frag & uspi->s_fpbmask));
+ goto out;
+ufs2:
+ u2_block = ufsi->i_u1.u2_i_data[*p++];
+ if (!u2_block)
+ goto out;
+
+
+ while (--depth) {
+ struct buffer_head *bh;
+ sector_t n = *p++;
+
+
+ temp = (u64)(uspi->s_sbbase) + fs64_to_cpu(sb, u2_block);
+ bh = sb_bread(sb, temp +(u64) (n>>shift));
+ if (!bh)
+ goto out;
+ u2_block = ((__fs64 *)bh->b_data)[n & mask];
+ brelse(bh);
+ if (!u2_block)
+ goto out;
+ }
+ temp = (u64)uspi->s_sbbase + fs64_to_cpu(sb, u2_block);
+ ret = temp + (u64) (frag & uspi->s_fpbmask);
+
+out:
+ if (needs_lock)
+ unlock_ufs(sb);
+ return ret;
+}
+
+/**
+ * ufs_inode_getfrag() - allocate new fragment(s)
+ * @inode: pointer to inode
+ * @fragment: number of `fragment' which hold pointer
+ * to new allocated fragment(s)
+ * @new_fragment: number of new allocated fragment(s)
+ * @required: how many fragment(s) we require
+ * @err: we set it if something wrong
+ * @phys: pointer to where we save physical number of new allocated fragments,
+ * NULL if we allocate not data(indirect blocks for example).
+ * @new: we set it if we allocate new block
+ * @locked_page: for ufs_new_fragments()
+ */
+static struct buffer_head *
+ufs_inode_getfrag(struct inode *inode, u64 fragment,
+ sector_t new_fragment, unsigned int required, int *err,
+ long *phys, int *new, struct page *locked_page)
+{
+ struct ufs_inode_info *ufsi = UFS_I(inode);
+ struct super_block *sb = inode->i_sb;
+ struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
+ struct buffer_head * result;
+ unsigned blockoff, lastblockoff;
+ u64 tmp, goal, lastfrag, block, lastblock;
+ void *p, *p2;
+
+ UFSD("ENTER, ino %lu, fragment %llu, new_fragment %llu, required %u, "
+ "metadata %d\n", inode->i_ino, (unsigned long long)fragment,
+ (unsigned long long)new_fragment, required, !phys);
+
+ /* TODO : to be done for write support
+ if ( (flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
+ goto ufs2;
+ */
+
+ block = ufs_fragstoblks (fragment);
+ blockoff = ufs_fragnum (fragment);
+ p = ufs_get_direct_data_ptr(uspi, ufsi, block);
+
+ goal = 0;
+
+repeat:
+ tmp = ufs_data_ptr_to_cpu(sb, p);
+
+ lastfrag = ufsi->i_lastfrag;
+ if (tmp && fragment < lastfrag) {
+ if (!phys) {
+ result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff);
+ if (tmp == ufs_data_ptr_to_cpu(sb, p)) {
+ UFSD("EXIT, result %llu\n",
+ (unsigned long long)tmp + blockoff);
+ return result;
+ }
+ brelse (result);
+ goto repeat;
+ } else {
+ *phys = uspi->s_sbbase + tmp + blockoff;
+ return NULL;
+ }
+ }
+
+ lastblock = ufs_fragstoblks (lastfrag);
+ lastblockoff = ufs_fragnum (lastfrag);
+ /*
+ * We will extend file into new block beyond last allocated block
+ */
+ if (lastblock < block) {
+ /*
+ * We must reallocate last allocated block
+ */
+ if (lastblockoff) {
+ p2 = ufs_get_direct_data_ptr(uspi, ufsi, lastblock);
+ tmp = ufs_new_fragments(inode, p2, lastfrag,
+ ufs_data_ptr_to_cpu(sb, p2),
+ uspi->s_fpb - lastblockoff,
+ err, locked_page);
+ if (!tmp) {
+ if (lastfrag != ufsi->i_lastfrag)
+ goto repeat;
+ else
+ return NULL;
+ }
+ lastfrag = ufsi->i_lastfrag;
+
+ }
+ tmp = ufs_data_ptr_to_cpu(sb,
+ ufs_get_direct_data_ptr(uspi, ufsi,
+ lastblock));
+ if (tmp)
+ goal = tmp + uspi->s_fpb;
+ tmp = ufs_new_fragments (inode, p, fragment - blockoff,
+ goal, required + blockoff,
+ err,
+ phys != NULL ? locked_page : NULL);
+ } else if (lastblock == block) {
+ /*
+ * We will extend last allocated block
+ */
+ tmp = ufs_new_fragments(inode, p, fragment -
+ (blockoff - lastblockoff),
+ ufs_data_ptr_to_cpu(sb, p),
+ required + (blockoff - lastblockoff),
+ err, phys != NULL ? locked_page : NULL);
+ } else /* (lastblock > block) */ {
+ /*
+ * We will allocate new block before last allocated block
+ */
+ if (block) {
+ tmp = ufs_data_ptr_to_cpu(sb,
+ ufs_get_direct_data_ptr(uspi, ufsi, block - 1));
+ if (tmp)
+ goal = tmp + uspi->s_fpb;
+ }
+ tmp = ufs_new_fragments(inode, p, fragment - blockoff,
+ goal, uspi->s_fpb, err,
+ phys != NULL ? locked_page : NULL);
+ }
+ if (!tmp) {
+ if ((!blockoff && ufs_data_ptr_to_cpu(sb, p)) ||
+ (blockoff && lastfrag != ufsi->i_lastfrag))
+ goto repeat;
+ *err = -ENOSPC;
+ return NULL;
+ }
+
+ if (!phys) {
+ result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff);
+ } else {
+ *phys = uspi->s_sbbase + tmp + blockoff;
+ result = NULL;
+ *err = 0;
+ *new = 1;
+ }
+
+ inode->i_ctime = CURRENT_TIME_SEC;
+ if (IS_SYNC(inode))
+ ufs_sync_inode (inode);
+ mark_inode_dirty(inode);
+ UFSD("EXIT, result %llu\n", (unsigned long long)tmp + blockoff);
+ return result;
+
+ /* This part : To be implemented ....
+ Required only for writing, not required for READ-ONLY.
+ufs2:
+
+ u2_block = ufs_fragstoblks(fragment);
+ u2_blockoff = ufs_fragnum(fragment);
+ p = ufsi->i_u1.u2_i_data + block;
+ goal = 0;
+
+repeat2:
+ tmp = fs32_to_cpu(sb, *p);
+ lastfrag = ufsi->i_lastfrag;
+
+ */
+}
+
+/**
+ * ufs_inode_getblock() - allocate new block
+ * @inode: pointer to inode
+ * @bh: pointer to block which hold "pointer" to new allocated block
+ * @fragment: number of `fragment' which hold pointer
+ * to new allocated block
+ * @new_fragment: number of new allocated fragment
+ * (block will hold this fragment and also uspi->s_fpb-1)
+ * @err: see ufs_inode_getfrag()
+ * @phys: see ufs_inode_getfrag()
+ * @new: see ufs_inode_getfrag()
+ * @locked_page: see ufs_inode_getfrag()
+ */
+static struct buffer_head *
+ufs_inode_getblock(struct inode *inode, struct buffer_head *bh,
+ u64 fragment, sector_t new_fragment, int *err,
+ long *phys, int *new, struct page *locked_page)
+{
+ struct super_block *sb = inode->i_sb;
+ struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
+ struct buffer_head * result;
+ unsigned blockoff;
+ u64 tmp, goal, block;
+ void *p;
+
+ block = ufs_fragstoblks (fragment);
+ blockoff = ufs_fragnum (fragment);
+
+ UFSD("ENTER, ino %lu, fragment %llu, new_fragment %llu, metadata %d\n",
+ inode->i_ino, (unsigned long long)fragment,
+ (unsigned long long)new_fragment, !phys);
+
+ result = NULL;
+ if (!bh)
+ goto out;
+ if (!buffer_uptodate(bh)) {
+ ll_rw_block (READ, 1, &bh);
+ wait_on_buffer (bh);
+ if (!buffer_uptodate(bh))
+ goto out;
+ }
+ if (uspi->fs_magic == UFS2_MAGIC)
+ p = (__fs64 *)bh->b_data + block;
+ else
+ p = (__fs32 *)bh->b_data + block;
+repeat:
+ tmp = ufs_data_ptr_to_cpu(sb, p);
+ if (tmp) {
+ if (!phys) {
+ result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff);
+ if (tmp == ufs_data_ptr_to_cpu(sb, p))
+ goto out;
+ brelse (result);
+ goto repeat;
+ } else {
+ *phys = uspi->s_sbbase + tmp + blockoff;
+ goto out;
+ }
+ }
+
+ if (block && (uspi->fs_magic == UFS2_MAGIC ?
+ (tmp = fs64_to_cpu(sb, ((__fs64 *)bh->b_data)[block-1])) :
+ (tmp = fs32_to_cpu(sb, ((__fs32 *)bh->b_data)[block-1]))))
+ goal = tmp + uspi->s_fpb;
+ else
+ goal = bh->b_blocknr + uspi->s_fpb;
+ tmp = ufs_new_fragments(inode, p, ufs_blknum(new_fragment), goal,
+ uspi->s_fpb, err, locked_page);
+ if (!tmp) {
+ if (ufs_data_ptr_to_cpu(sb, p))
+ goto repeat;
+ goto out;
+ }
+
+
+ if (!phys) {
+ result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff);
+ } else {
+ *phys = uspi->s_sbbase + tmp + blockoff;
+ *new = 1;
+ }
+
+ mark_buffer_dirty(bh);
+ if (IS_SYNC(inode))
+ sync_dirty_buffer(bh);
+ inode->i_ctime = CURRENT_TIME_SEC;
+ mark_inode_dirty(inode);
+ UFSD("result %llu\n", (unsigned long long)tmp + blockoff);
+out:
+ brelse (bh);
+ UFSD("EXIT\n");
+ return result;
+}
+
+/**
+ * ufs_getfrag_block() - `get_block_t' function, interface between UFS and
+ * readpage, writepage and so on
+ */
+
+int ufs_getfrag_block(struct inode *inode, sector_t fragment, struct buffer_head *bh_result, int create)
+{
+ struct super_block * sb = inode->i_sb;
+ struct ufs_sb_info * sbi = UFS_SB(sb);
+ struct ufs_sb_private_info * uspi = sbi->s_uspi;
+ struct buffer_head * bh;
+ int ret, err, new;
+ unsigned long ptr,phys;
+ u64 phys64 = 0;
+ bool needs_lock = (sbi->mutex_owner != current);
+
+ if (!create) {
+ phys64 = ufs_frag_map(inode, fragment, needs_lock);
+ UFSD("phys64 = %llu\n", (unsigned long long)phys64);
+ if (phys64)
+ map_bh(bh_result, sb, phys64);
+ return 0;
+ }
+
+ /* This code entered only while writing ....? */
+
+ err = -EIO;
+ new = 0;
+ ret = 0;
+ bh = NULL;
+
+ if (needs_lock)
+ lock_ufs(sb);
+
+ UFSD("ENTER, ino %lu, fragment %llu\n", inode->i_ino, (unsigned long long)fragment);
+ if (fragment >
+ ((UFS_NDADDR + uspi->s_apb + uspi->s_2apb + uspi->s_3apb)
+ << uspi->s_fpbshift))
+ goto abort_too_big;
+
+ err = 0;
+ ptr = fragment;
+
+ /*
+ * ok, these macros clean the logic up a bit and make
+ * it much more readable:
+ */
+#define GET_INODE_DATABLOCK(x) \
+ ufs_inode_getfrag(inode, x, fragment, 1, &err, &phys, &new,\
+ bh_result->b_page)
+#define GET_INODE_PTR(x) \
+ ufs_inode_getfrag(inode, x, fragment, uspi->s_fpb, &err, NULL, NULL,\
+ bh_result->b_page)
+#define GET_INDIRECT_DATABLOCK(x) \
+ ufs_inode_getblock(inode, bh, x, fragment, \
+ &err, &phys, &new, bh_result->b_page)
+#define GET_INDIRECT_PTR(x) \
+ ufs_inode_getblock(inode, bh, x, fragment, \
+ &err, NULL, NULL, NULL)
+
+ if (ptr < UFS_NDIR_FRAGMENT) {
+ bh = GET_INODE_DATABLOCK(ptr);
+ goto out;
+ }
+ ptr -= UFS_NDIR_FRAGMENT;
+ if (ptr < (1 << (uspi->s_apbshift + uspi->s_fpbshift))) {
+ bh = GET_INODE_PTR(UFS_IND_FRAGMENT + (ptr >> uspi->s_apbshift));
+ goto get_indirect;
+ }
+ ptr -= 1 << (uspi->s_apbshift + uspi->s_fpbshift);
+ if (ptr < (1 << (uspi->s_2apbshift + uspi->s_fpbshift))) {
+ bh = GET_INODE_PTR(UFS_DIND_FRAGMENT + (ptr >> uspi->s_2apbshift));
+ goto get_double;
+ }
+ ptr -= 1 << (uspi->s_2apbshift + uspi->s_fpbshift);
+ bh = GET_INODE_PTR(UFS_TIND_FRAGMENT + (ptr >> uspi->s_3apbshift));
+ bh = GET_INDIRECT_PTR((ptr >> uspi->s_2apbshift) & uspi->s_apbmask);
+get_double:
+ bh = GET_INDIRECT_PTR((ptr >> uspi->s_apbshift) & uspi->s_apbmask);
+get_indirect:
+ bh = GET_INDIRECT_DATABLOCK(ptr & uspi->s_apbmask);
+
+#undef GET_INODE_DATABLOCK
+#undef GET_INODE_PTR
+#undef GET_INDIRECT_DATABLOCK
+#undef GET_INDIRECT_PTR
+
+out:
+ if (err)
+ goto abort;
+ if (new)
+ set_buffer_new(bh_result);
+ map_bh(bh_result, sb, phys);
+abort:
+ if (needs_lock)
+ unlock_ufs(sb);
+
+ return err;
+
+abort_too_big:
+ ufs_warning(sb, "ufs_get_block", "block > big");
+ goto abort;
+}
+
+static int ufs_writepage(struct page *page, struct writeback_control *wbc)
+{
+ return block_write_full_page(page,ufs_getfrag_block,wbc);
+}
+
+static int ufs_readpage(struct file *file, struct page *page)
+{
+ return block_read_full_page(page,ufs_getfrag_block);
+}
+
+int ufs_prepare_chunk(struct page *page, loff_t pos, unsigned len)
+{
+ return __block_write_begin(page, pos, len, ufs_getfrag_block);
+}
+
+static void ufs_write_failed(struct address_space *mapping, loff_t to)
+{
+ struct inode *inode = mapping->host;
+
+ if (to > inode->i_size)
+ truncate_pagecache(inode, inode->i_size);
+}
+
+static int ufs_write_begin(struct file *file, struct address_space *mapping,
+ loff_t pos, unsigned len, unsigned flags,
+ struct page **pagep, void **fsdata)
+{
+ int ret;
+
+ ret = block_write_begin(mapping, pos, len, flags, pagep,
+ ufs_getfrag_block);
+ if (unlikely(ret))
+ ufs_write_failed(mapping, pos + len);
+
+ return ret;
+}
+
+static sector_t ufs_bmap(struct address_space *mapping, sector_t block)
+{
+ return generic_block_bmap(mapping,block,ufs_getfrag_block);
+}
+
+const struct address_space_operations ufs_aops = {
+ .readpage = ufs_readpage,
+ .writepage = ufs_writepage,
+ .write_begin = ufs_write_begin,
+ .write_end = generic_write_end,
+ .bmap = ufs_bmap
+};
+
+static void ufs_set_inode_ops(struct inode *inode)
+{
+ if (S_ISREG(inode->i_mode)) {
+ inode->i_op = &ufs_file_inode_operations;
+ inode->i_fop = &ufs_file_operations;
+ inode->i_mapping->a_ops = &ufs_aops;
+ } else if (S_ISDIR(inode->i_mode)) {
+ inode->i_op = &ufs_dir_inode_operations;
+ inode->i_fop = &ufs_dir_operations;
+ inode->i_mapping->a_ops = &ufs_aops;
+ } else if (S_ISLNK(inode->i_mode)) {
+ if (!inode->i_blocks)
+ inode->i_op = &ufs_fast_symlink_inode_operations;
+ else {
+ inode->i_op = &ufs_symlink_inode_operations;
+ inode->i_mapping->a_ops = &ufs_aops;
+ }
+ } else
+ init_special_inode(inode, inode->i_mode,
+ ufs_get_inode_dev(inode->i_sb, UFS_I(inode)));
+}
+
+static int ufs1_read_inode(struct inode *inode, struct ufs_inode *ufs_inode)
+{
+ struct ufs_inode_info *ufsi = UFS_I(inode);
+ struct super_block *sb = inode->i_sb;
+ umode_t mode;
+
+ /*
+ * Copy data to the in-core inode.
+ */
+ inode->i_mode = mode = fs16_to_cpu(sb, ufs_inode->ui_mode);
+ set_nlink(inode, fs16_to_cpu(sb, ufs_inode->ui_nlink));
+ if (inode->i_nlink == 0) {
+ ufs_error (sb, "ufs_read_inode", "inode %lu has zero nlink\n", inode->i_ino);
+ return -1;
+ }
+
+ /*
+ * Linux now has 32-bit uid and gid, so we can support EFT.
+ */
+ i_uid_write(inode, ufs_get_inode_uid(sb, ufs_inode));
+ i_gid_write(inode, ufs_get_inode_gid(sb, ufs_inode));
+
+ inode->i_size = fs64_to_cpu(sb, ufs_inode->ui_size);
+ inode->i_atime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_atime.tv_sec);
+ inode->i_ctime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_ctime.tv_sec);
+ inode->i_mtime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_mtime.tv_sec);
+ inode->i_mtime.tv_nsec = 0;
+ inode->i_atime.tv_nsec = 0;
+ inode->i_ctime.tv_nsec = 0;
+ inode->i_blocks = fs32_to_cpu(sb, ufs_inode->ui_blocks);
+ inode->i_generation = fs32_to_cpu(sb, ufs_inode->ui_gen);
+ ufsi->i_flags = fs32_to_cpu(sb, ufs_inode->ui_flags);
+ ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow);
+ ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag);
+
+
+ if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) {
+ memcpy(ufsi->i_u1.i_data, &ufs_inode->ui_u2.ui_addr,
+ sizeof(ufs_inode->ui_u2.ui_addr));
+ } else {
+ memcpy(ufsi->i_u1.i_symlink, ufs_inode->ui_u2.ui_symlink,
+ sizeof(ufs_inode->ui_u2.ui_symlink) - 1);
+ ufsi->i_u1.i_symlink[sizeof(ufs_inode->ui_u2.ui_symlink) - 1] = 0;
+ }
+ return 0;
+}
+
+static int ufs2_read_inode(struct inode *inode, struct ufs2_inode *ufs2_inode)
+{
+ struct ufs_inode_info *ufsi = UFS_I(inode);
+ struct super_block *sb = inode->i_sb;
+ umode_t mode;
+
+ UFSD("Reading ufs2 inode, ino %lu\n", inode->i_ino);
+ /*
+ * Copy data to the in-core inode.
+ */
+ inode->i_mode = mode = fs16_to_cpu(sb, ufs2_inode->ui_mode);
+ set_nlink(inode, fs16_to_cpu(sb, ufs2_inode->ui_nlink));
+ if (inode->i_nlink == 0) {
+ ufs_error (sb, "ufs_read_inode", "inode %lu has zero nlink\n", inode->i_ino);
+ return -1;
+ }
+
+ /*
+ * Linux now has 32-bit uid and gid, so we can support EFT.
+ */
+ i_uid_write(inode, fs32_to_cpu(sb, ufs2_inode->ui_uid));
+ i_gid_write(inode, fs32_to_cpu(sb, ufs2_inode->ui_gid));
+
+ inode->i_size = fs64_to_cpu(sb, ufs2_inode->ui_size);
+ inode->i_atime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_atime);
+ inode->i_ctime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_ctime);
+ inode->i_mtime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_mtime);
+ inode->i_atime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_atimensec);
+ inode->i_ctime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_ctimensec);
+ inode->i_mtime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_mtimensec);
+ inode->i_blocks = fs64_to_cpu(sb, ufs2_inode->ui_blocks);
+ inode->i_generation = fs32_to_cpu(sb, ufs2_inode->ui_gen);
+ ufsi->i_flags = fs32_to_cpu(sb, ufs2_inode->ui_flags);
+ /*
+ ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow);
+ ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag);
+ */
+
+ if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) {
+ memcpy(ufsi->i_u1.u2_i_data, &ufs2_inode->ui_u2.ui_addr,
+ sizeof(ufs2_inode->ui_u2.ui_addr));
+ } else {
+ memcpy(ufsi->i_u1.i_symlink, ufs2_inode->ui_u2.ui_symlink,
+ sizeof(ufs2_inode->ui_u2.ui_symlink) - 1);
+ ufsi->i_u1.i_symlink[sizeof(ufs2_inode->ui_u2.ui_symlink) - 1] = 0;
+ }
+ return 0;
+}
+
+struct inode *ufs_iget(struct super_block *sb, unsigned long ino)
+{
+ struct ufs_inode_info *ufsi;
+ struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
+ struct buffer_head * bh;
+ struct inode *inode;
+ int err;
+
+ UFSD("ENTER, ino %lu\n", ino);
+
+ if (ino < UFS_ROOTINO || ino > (uspi->s_ncg * uspi->s_ipg)) {
+ ufs_warning(sb, "ufs_read_inode", "bad inode number (%lu)\n",
+ ino);
+ return ERR_PTR(-EIO);
+ }
+
+ inode = iget_locked(sb, ino);
+ if (!inode)
+ return ERR_PTR(-ENOMEM);
+ if (!(inode->i_state & I_NEW))
+ return inode;
+
+ ufsi = UFS_I(inode);
+
+ bh = sb_bread(sb, uspi->s_sbbase + ufs_inotofsba(inode->i_ino));
+ if (!bh) {
+ ufs_warning(sb, "ufs_read_inode", "unable to read inode %lu\n",
+ inode->i_ino);
+ goto bad_inode;
+ }
+ if ((UFS_SB(sb)->s_flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
+ struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data;
+
+ err = ufs2_read_inode(inode,
+ ufs2_inode + ufs_inotofsbo(inode->i_ino));
+ } else {
+ struct ufs_inode *ufs_inode = (struct ufs_inode *)bh->b_data;
+
+ err = ufs1_read_inode(inode,
+ ufs_inode + ufs_inotofsbo(inode->i_ino));
+ }
+
+ if (err)
+ goto bad_inode;
+ inode->i_version++;
+ ufsi->i_lastfrag =
+ (inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift;
+ ufsi->i_dir_start_lookup = 0;
+ ufsi->i_osync = 0;
+
+ ufs_set_inode_ops(inode);
+
+ brelse(bh);
+
+ UFSD("EXIT\n");
+ unlock_new_inode(inode);
+ return inode;
+
+bad_inode:
+ iget_failed(inode);
+ return ERR_PTR(-EIO);
+}
+
+static void ufs1_update_inode(struct inode *inode, struct ufs_inode *ufs_inode)
+{
+ struct super_block *sb = inode->i_sb;
+ struct ufs_inode_info *ufsi = UFS_I(inode);
+
+ ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode);
+ ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink);
+
+ ufs_set_inode_uid(sb, ufs_inode, i_uid_read(inode));
+ ufs_set_inode_gid(sb, ufs_inode, i_gid_read(inode));
+
+ ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size);
+ ufs_inode->ui_atime.tv_sec = cpu_to_fs32(sb, inode->i_atime.tv_sec);
+ ufs_inode->ui_atime.tv_usec = 0;
+ ufs_inode->ui_ctime.tv_sec = cpu_to_fs32(sb, inode->i_ctime.tv_sec);
+ ufs_inode->ui_ctime.tv_usec = 0;
+ ufs_inode->ui_mtime.tv_sec = cpu_to_fs32(sb, inode->i_mtime.tv_sec);
+ ufs_inode->ui_mtime.tv_usec = 0;
+ ufs_inode->ui_blocks = cpu_to_fs32(sb, inode->i_blocks);
+ ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags);
+ ufs_inode->ui_gen = cpu_to_fs32(sb, inode->i_generation);
+
+ if ((UFS_SB(sb)->s_flags & UFS_UID_MASK) == UFS_UID_EFT) {
+ ufs_inode->ui_u3.ui_sun.ui_shadow = cpu_to_fs32(sb, ufsi->i_shadow);
+ ufs_inode->ui_u3.ui_sun.ui_oeftflag = cpu_to_fs32(sb, ufsi->i_oeftflag);
+ }
+
+ if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
+ /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */
+ ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.i_data[0];
+ } else if (inode->i_blocks) {
+ memcpy(&ufs_inode->ui_u2.ui_addr, ufsi->i_u1.i_data,
+ sizeof(ufs_inode->ui_u2.ui_addr));
+ }
+ else {
+ memcpy(&ufs_inode->ui_u2.ui_symlink, ufsi->i_u1.i_symlink,
+ sizeof(ufs_inode->ui_u2.ui_symlink));
+ }
+
+ if (!inode->i_nlink)
+ memset (ufs_inode, 0, sizeof(struct ufs_inode));
+}
+
+static void ufs2_update_inode(struct inode *inode, struct ufs2_inode *ufs_inode)
+{
+ struct super_block *sb = inode->i_sb;
+ struct ufs_inode_info *ufsi = UFS_I(inode);
+
+ UFSD("ENTER\n");
+ ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode);
+ ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink);
+
+ ufs_inode->ui_uid = cpu_to_fs32(sb, i_uid_read(inode));
+ ufs_inode->ui_gid = cpu_to_fs32(sb, i_gid_read(inode));
+
+ ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size);
+ ufs_inode->ui_atime = cpu_to_fs64(sb, inode->i_atime.tv_sec);
+ ufs_inode->ui_atimensec = cpu_to_fs32(sb, inode->i_atime.tv_nsec);
+ ufs_inode->ui_ctime = cpu_to_fs64(sb, inode->i_ctime.tv_sec);
+ ufs_inode->ui_ctimensec = cpu_to_fs32(sb, inode->i_ctime.tv_nsec);
+ ufs_inode->ui_mtime = cpu_to_fs64(sb, inode->i_mtime.tv_sec);
+ ufs_inode->ui_mtimensec = cpu_to_fs32(sb, inode->i_mtime.tv_nsec);
+
+ ufs_inode->ui_blocks = cpu_to_fs64(sb, inode->i_blocks);
+ ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags);
+ ufs_inode->ui_gen = cpu_to_fs32(sb, inode->i_generation);
+
+ if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
+ /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */
+ ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.u2_i_data[0];
+ } else if (inode->i_blocks) {
+ memcpy(&ufs_inode->ui_u2.ui_addr, ufsi->i_u1.u2_i_data,
+ sizeof(ufs_inode->ui_u2.ui_addr));
+ } else {
+ memcpy(&ufs_inode->ui_u2.ui_symlink, ufsi->i_u1.i_symlink,
+ sizeof(ufs_inode->ui_u2.ui_symlink));
+ }
+
+ if (!inode->i_nlink)
+ memset (ufs_inode, 0, sizeof(struct ufs2_inode));
+ UFSD("EXIT\n");
+}
+
+static int ufs_update_inode(struct inode * inode, int do_sync)
+{
+ struct super_block *sb = inode->i_sb;
+ struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
+ struct buffer_head * bh;
+
+ UFSD("ENTER, ino %lu\n", inode->i_ino);
+
+ if (inode->i_ino < UFS_ROOTINO ||
+ inode->i_ino > (uspi->s_ncg * uspi->s_ipg)) {
+ ufs_warning (sb, "ufs_read_inode", "bad inode number (%lu)\n", inode->i_ino);
+ return -1;
+ }
+
+ bh = sb_bread(sb, ufs_inotofsba(inode->i_ino));
+ if (!bh) {
+ ufs_warning (sb, "ufs_read_inode", "unable to read inode %lu\n", inode->i_ino);
+ return -1;
+ }
+ if (uspi->fs_magic == UFS2_MAGIC) {
+ struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data;
+
+ ufs2_update_inode(inode,
+ ufs2_inode + ufs_inotofsbo(inode->i_ino));
+ } else {
+ struct ufs_inode *ufs_inode = (struct ufs_inode *) bh->b_data;
+
+ ufs1_update_inode(inode, ufs_inode + ufs_inotofsbo(inode->i_ino));
+ }
+
+ mark_buffer_dirty(bh);
+ if (do_sync)
+ sync_dirty_buffer(bh);
+ brelse (bh);
+
+ UFSD("EXIT\n");
+ return 0;
+}
+
+int ufs_write_inode(struct inode *inode, struct writeback_control *wbc)
+{
+ int ret;
+ lock_ufs(inode->i_sb);
+ ret = ufs_update_inode(inode, wbc->sync_mode == WB_SYNC_ALL);
+ unlock_ufs(inode->i_sb);
+ return ret;
+}
+
+int ufs_sync_inode (struct inode *inode)
+{
+ return ufs_update_inode (inode, 1);
+}
+
+void ufs_evict_inode(struct inode * inode)
+{
+ int want_delete = 0;
+
+ if (!inode->i_nlink && !is_bad_inode(inode))
+ want_delete = 1;
+
+ truncate_inode_pages_final(&inode->i_data);
+ if (want_delete) {
+ loff_t old_i_size;
+ /*UFS_I(inode)->i_dtime = CURRENT_TIME;*/
+ lock_ufs(inode->i_sb);
+ mark_inode_dirty(inode);
+ ufs_update_inode(inode, IS_SYNC(inode));
+ old_i_size = inode->i_size;
+ inode->i_size = 0;
+ if (inode->i_blocks && ufs_truncate(inode, old_i_size))
+ ufs_warning(inode->i_sb, __func__, "ufs_truncate failed\n");
+ unlock_ufs(inode->i_sb);
+ }
+
+ invalidate_inode_buffers(inode);
+ clear_inode(inode);
+
+ if (want_delete) {
+ lock_ufs(inode->i_sb);
+ ufs_free_inode(inode);
+ unlock_ufs(inode->i_sb);
+ }
+}
diff --git a/fs/ufs/namei.c b/fs/ufs/namei.c
new file mode 100644
index 000000000..60ee32249
--- /dev/null
+++ b/fs/ufs/namei.c
@@ -0,0 +1,356 @@
+/*
+ * linux/fs/ufs/namei.c
+ *
+ * Migration to usage of "page cache" on May 2006 by
+ * Evgeniy Dushistov <dushistov@mail.ru> based on ext2 code base.
+ *
+ * Copyright (C) 1998
+ * Daniel Pirkl <daniel.pirkl@email.cz>
+ * Charles University, Faculty of Mathematics and Physics
+ *
+ * from
+ *
+ * linux/fs/ext2/namei.c
+ *
+ * Copyright (C) 1992, 1993, 1994, 1995
+ * Remy Card (card@masi.ibp.fr)
+ * Laboratoire MASI - Institut Blaise Pascal
+ * Universite Pierre et Marie Curie (Paris VI)
+ *
+ * from
+ *
+ * linux/fs/minix/namei.c
+ *
+ * Copyright (C) 1991, 1992 Linus Torvalds
+ *
+ * Big-endian to little-endian byte-swapping/bitmaps by
+ * David S. Miller (davem@caip.rutgers.edu), 1995
+ */
+
+#include <linux/time.h>
+#include <linux/fs.h>
+
+#include "ufs_fs.h"
+#include "ufs.h"
+#include "util.h"
+
+static inline int ufs_add_nondir(struct dentry *dentry, struct inode *inode)
+{
+ int err = ufs_add_link(dentry, inode);
+ if (!err) {
+ unlock_new_inode(inode);
+ d_instantiate(dentry, inode);
+ return 0;
+ }
+ inode_dec_link_count(inode);
+ unlock_new_inode(inode);
+ iput(inode);
+ return err;
+}
+
+static struct dentry *ufs_lookup(struct inode * dir, struct dentry *dentry, unsigned int flags)
+{
+ struct inode * inode = NULL;
+ ino_t ino;
+
+ if (dentry->d_name.len > UFS_MAXNAMLEN)
+ return ERR_PTR(-ENAMETOOLONG);
+
+ lock_ufs(dir->i_sb);
+ ino = ufs_inode_by_name(dir, &dentry->d_name);
+ if (ino)
+ inode = ufs_iget(dir->i_sb, ino);
+ unlock_ufs(dir->i_sb);
+ return d_splice_alias(inode, dentry);
+}
+
+/*
+ * By the time this is called, we already have created
+ * the directory cache entry for the new file, but it
+ * is so far negative - it has no inode.
+ *
+ * If the create succeeds, we fill in the inode information
+ * with d_instantiate().
+ */
+static int ufs_create (struct inode * dir, struct dentry * dentry, umode_t mode,
+ bool excl)
+{
+ struct inode *inode;
+ int err;
+
+ UFSD("BEGIN\n");
+
+ inode = ufs_new_inode(dir, mode);
+ err = PTR_ERR(inode);
+
+ if (!IS_ERR(inode)) {
+ inode->i_op = &ufs_file_inode_operations;
+ inode->i_fop = &ufs_file_operations;
+ inode->i_mapping->a_ops = &ufs_aops;
+ mark_inode_dirty(inode);
+ lock_ufs(dir->i_sb);
+ err = ufs_add_nondir(dentry, inode);
+ unlock_ufs(dir->i_sb);
+ }
+ UFSD("END: err=%d\n", err);
+ return err;
+}
+
+static int ufs_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, dev_t rdev)
+{
+ struct inode *inode;
+ int err;
+
+ if (!old_valid_dev(rdev))
+ return -EINVAL;
+
+ inode = ufs_new_inode(dir, mode);
+ err = PTR_ERR(inode);
+ if (!IS_ERR(inode)) {
+ init_special_inode(inode, mode, rdev);
+ ufs_set_inode_dev(inode->i_sb, UFS_I(inode), rdev);
+ mark_inode_dirty(inode);
+ lock_ufs(dir->i_sb);
+ err = ufs_add_nondir(dentry, inode);
+ unlock_ufs(dir->i_sb);
+ }
+ return err;
+}
+
+static int ufs_symlink (struct inode * dir, struct dentry * dentry,
+ const char * symname)
+{
+ struct super_block * sb = dir->i_sb;
+ int err = -ENAMETOOLONG;
+ unsigned l = strlen(symname)+1;
+ struct inode * inode;
+
+ if (l > sb->s_blocksize)
+ goto out_notlocked;
+
+ lock_ufs(dir->i_sb);
+ inode = ufs_new_inode(dir, S_IFLNK | S_IRWXUGO);
+ err = PTR_ERR(inode);
+ if (IS_ERR(inode))
+ goto out;
+
+ if (l > UFS_SB(sb)->s_uspi->s_maxsymlinklen) {
+ /* slow symlink */
+ inode->i_op = &ufs_symlink_inode_operations;
+ inode->i_mapping->a_ops = &ufs_aops;
+ err = page_symlink(inode, symname, l);
+ if (err)
+ goto out_fail;
+ } else {
+ /* fast symlink */
+ inode->i_op = &ufs_fast_symlink_inode_operations;
+ memcpy(UFS_I(inode)->i_u1.i_symlink, symname, l);
+ inode->i_size = l-1;
+ }
+ mark_inode_dirty(inode);
+
+ err = ufs_add_nondir(dentry, inode);
+out:
+ unlock_ufs(dir->i_sb);
+out_notlocked:
+ return err;
+
+out_fail:
+ inode_dec_link_count(inode);
+ unlock_new_inode(inode);
+ iput(inode);
+ goto out;
+}
+
+static int ufs_link (struct dentry * old_dentry, struct inode * dir,
+ struct dentry *dentry)
+{
+ struct inode *inode = d_inode(old_dentry);
+ int error;
+
+ lock_ufs(dir->i_sb);
+
+ inode->i_ctime = CURRENT_TIME_SEC;
+ inode_inc_link_count(inode);
+ ihold(inode);
+
+ error = ufs_add_link(dentry, inode);
+ if (error) {
+ inode_dec_link_count(inode);
+ iput(inode);
+ } else
+ d_instantiate(dentry, inode);
+ unlock_ufs(dir->i_sb);
+ return error;
+}
+
+static int ufs_mkdir(struct inode * dir, struct dentry * dentry, umode_t mode)
+{
+ struct inode * inode;
+ int err;
+
+ lock_ufs(dir->i_sb);
+ inode_inc_link_count(dir);
+
+ inode = ufs_new_inode(dir, S_IFDIR|mode);
+ err = PTR_ERR(inode);
+ if (IS_ERR(inode))
+ goto out_dir;
+
+ inode->i_op = &ufs_dir_inode_operations;
+ inode->i_fop = &ufs_dir_operations;
+ inode->i_mapping->a_ops = &ufs_aops;
+
+ inode_inc_link_count(inode);
+
+ err = ufs_make_empty(inode, dir);
+ if (err)
+ goto out_fail;
+
+ err = ufs_add_link(dentry, inode);
+ if (err)
+ goto out_fail;
+ unlock_ufs(dir->i_sb);
+
+ unlock_new_inode(inode);
+ d_instantiate(dentry, inode);
+out:
+ return err;
+
+out_fail:
+ inode_dec_link_count(inode);
+ inode_dec_link_count(inode);
+ unlock_new_inode(inode);
+ iput (inode);
+out_dir:
+ inode_dec_link_count(dir);
+ unlock_ufs(dir->i_sb);
+ goto out;
+}
+
+static int ufs_unlink(struct inode *dir, struct dentry *dentry)
+{
+ struct inode * inode = d_inode(dentry);
+ struct ufs_dir_entry *de;
+ struct page *page;
+ int err = -ENOENT;
+
+ de = ufs_find_entry(dir, &dentry->d_name, &page);
+ if (!de)
+ goto out;
+
+ err = ufs_delete_entry(dir, de, page);
+ if (err)
+ goto out;
+
+ inode->i_ctime = dir->i_ctime;
+ inode_dec_link_count(inode);
+ err = 0;
+out:
+ return err;
+}
+
+static int ufs_rmdir (struct inode * dir, struct dentry *dentry)
+{
+ struct inode * inode = d_inode(dentry);
+ int err= -ENOTEMPTY;
+
+ lock_ufs(dir->i_sb);
+ if (ufs_empty_dir (inode)) {
+ err = ufs_unlink(dir, dentry);
+ if (!err) {
+ inode->i_size = 0;
+ inode_dec_link_count(inode);
+ inode_dec_link_count(dir);
+ }
+ }
+ unlock_ufs(dir->i_sb);
+ return err;
+}
+
+static int ufs_rename(struct inode *old_dir, struct dentry *old_dentry,
+ struct inode *new_dir, struct dentry *new_dentry)
+{
+ struct inode *old_inode = d_inode(old_dentry);
+ struct inode *new_inode = d_inode(new_dentry);
+ struct page *dir_page = NULL;
+ struct ufs_dir_entry * dir_de = NULL;
+ struct page *old_page;
+ struct ufs_dir_entry *old_de;
+ int err = -ENOENT;
+
+ old_de = ufs_find_entry(old_dir, &old_dentry->d_name, &old_page);
+ if (!old_de)
+ goto out;
+
+ if (S_ISDIR(old_inode->i_mode)) {
+ err = -EIO;
+ dir_de = ufs_dotdot(old_inode, &dir_page);
+ if (!dir_de)
+ goto out_old;
+ }
+
+ if (new_inode) {
+ struct page *new_page;
+ struct ufs_dir_entry *new_de;
+
+ err = -ENOTEMPTY;
+ if (dir_de && !ufs_empty_dir(new_inode))
+ goto out_dir;
+
+ err = -ENOENT;
+ new_de = ufs_find_entry(new_dir, &new_dentry->d_name, &new_page);
+ if (!new_de)
+ goto out_dir;
+ ufs_set_link(new_dir, new_de, new_page, old_inode);
+ new_inode->i_ctime = CURRENT_TIME_SEC;
+ if (dir_de)
+ drop_nlink(new_inode);
+ inode_dec_link_count(new_inode);
+ } else {
+ err = ufs_add_link(new_dentry, old_inode);
+ if (err)
+ goto out_dir;
+ if (dir_de)
+ inode_inc_link_count(new_dir);
+ }
+
+ /*
+ * Like most other Unix systems, set the ctime for inodes on a
+ * rename.
+ */
+ old_inode->i_ctime = CURRENT_TIME_SEC;
+
+ ufs_delete_entry(old_dir, old_de, old_page);
+ mark_inode_dirty(old_inode);
+
+ if (dir_de) {
+ ufs_set_link(old_inode, dir_de, dir_page, new_dir);
+ inode_dec_link_count(old_dir);
+ }
+ return 0;
+
+
+out_dir:
+ if (dir_de) {
+ kunmap(dir_page);
+ page_cache_release(dir_page);
+ }
+out_old:
+ kunmap(old_page);
+ page_cache_release(old_page);
+out:
+ return err;
+}
+
+const struct inode_operations ufs_dir_inode_operations = {
+ .create = ufs_create,
+ .lookup = ufs_lookup,
+ .link = ufs_link,
+ .unlink = ufs_unlink,
+ .symlink = ufs_symlink,
+ .mkdir = ufs_mkdir,
+ .rmdir = ufs_rmdir,
+ .mknod = ufs_mknod,
+ .rename = ufs_rename,
+};
diff --git a/fs/ufs/super.c b/fs/ufs/super.c
new file mode 100644
index 000000000..dc33f9416
--- /dev/null
+++ b/fs/ufs/super.c
@@ -0,0 +1,1524 @@
+/*
+ * linux/fs/ufs/super.c
+ *
+ * Copyright (C) 1998
+ * Daniel Pirkl <daniel.pirkl@email.cz>
+ * Charles University, Faculty of Mathematics and Physics
+ */
+
+/* Derived from
+ *
+ * linux/fs/ext2/super.c
+ *
+ * Copyright (C) 1992, 1993, 1994, 1995
+ * Remy Card (card@masi.ibp.fr)
+ * Laboratoire MASI - Institut Blaise Pascal
+ * Universite Pierre et Marie Curie (Paris VI)
+ *
+ * from
+ *
+ * linux/fs/minix/inode.c
+ *
+ * Copyright (C) 1991, 1992 Linus Torvalds
+ *
+ * Big-endian to little-endian byte-swapping/bitmaps by
+ * David S. Miller (davem@caip.rutgers.edu), 1995
+ */
+
+/*
+ * Inspired by
+ *
+ * linux/fs/ufs/super.c
+ *
+ * Copyright (C) 1996
+ * Adrian Rodriguez (adrian@franklins-tower.rutgers.edu)
+ * Laboratory for Computer Science Research Computing Facility
+ * Rutgers, The State University of New Jersey
+ *
+ * Copyright (C) 1996 Eddie C. Dost (ecd@skynet.be)
+ *
+ * Kernel module support added on 96/04/26 by
+ * Stefan Reinauer <stepan@home.culture.mipt.ru>
+ *
+ * Module usage counts added on 96/04/29 by
+ * Gertjan van Wingerde <gwingerde@gmail.com>
+ *
+ * Clean swab support on 19970406 by
+ * Francois-Rene Rideau <fare@tunes.org>
+ *
+ * 4.4BSD (FreeBSD) support added on February 1st 1998 by
+ * Niels Kristian Bech Jensen <nkbj@image.dk> partially based
+ * on code by Martin von Loewis <martin@mira.isdn.cs.tu-berlin.de>.
+ *
+ * NeXTstep support added on February 5th 1998 by
+ * Niels Kristian Bech Jensen <nkbj@image.dk>.
+ *
+ * write support Daniel Pirkl <daniel.pirkl@email.cz> 1998
+ *
+ * HP/UX hfs filesystem support added by
+ * Martin K. Petersen <mkp@mkp.net>, August 1999
+ *
+ * UFS2 (of FreeBSD 5.x) support added by
+ * Niraj Kumar <niraj17@iitbombay.org>, Jan 2004
+ *
+ * UFS2 write support added by
+ * Evgeniy Dushistov <dushistov@mail.ru>, 2007
+ */
+
+#include <linux/exportfs.h>
+#include <linux/module.h>
+#include <linux/bitops.h>
+
+#include <stdarg.h>
+
+#include <asm/uaccess.h>
+
+#include <linux/errno.h>
+#include <linux/fs.h>
+#include <linux/slab.h>
+#include <linux/time.h>
+#include <linux/stat.h>
+#include <linux/string.h>
+#include <linux/blkdev.h>
+#include <linux/init.h>
+#include <linux/parser.h>
+#include <linux/buffer_head.h>
+#include <linux/vfs.h>
+#include <linux/log2.h>
+#include <linux/mount.h>
+#include <linux/seq_file.h>
+
+#include "ufs_fs.h"
+#include "ufs.h"
+#include "swab.h"
+#include "util.h"
+
+void lock_ufs(struct super_block *sb)
+{
+ struct ufs_sb_info *sbi = UFS_SB(sb);
+
+ mutex_lock(&sbi->mutex);
+ sbi->mutex_owner = current;
+}
+
+void unlock_ufs(struct super_block *sb)
+{
+ struct ufs_sb_info *sbi = UFS_SB(sb);
+
+ sbi->mutex_owner = NULL;
+ mutex_unlock(&sbi->mutex);
+}
+
+static struct inode *ufs_nfs_get_inode(struct super_block *sb, u64 ino, u32 generation)
+{
+ struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
+ struct inode *inode;
+
+ if (ino < UFS_ROOTINO || ino > uspi->s_ncg * uspi->s_ipg)
+ return ERR_PTR(-ESTALE);
+
+ inode = ufs_iget(sb, ino);
+ if (IS_ERR(inode))
+ return ERR_CAST(inode);
+ if (generation && inode->i_generation != generation) {
+ iput(inode);
+ return ERR_PTR(-ESTALE);
+ }
+ return inode;
+}
+
+static struct dentry *ufs_fh_to_dentry(struct super_block *sb, struct fid *fid,
+ int fh_len, int fh_type)
+{
+ return generic_fh_to_dentry(sb, fid, fh_len, fh_type, ufs_nfs_get_inode);
+}
+
+static struct dentry *ufs_fh_to_parent(struct super_block *sb, struct fid *fid,
+ int fh_len, int fh_type)
+{
+ return generic_fh_to_parent(sb, fid, fh_len, fh_type, ufs_nfs_get_inode);
+}
+
+static struct dentry *ufs_get_parent(struct dentry *child)
+{
+ struct qstr dot_dot = QSTR_INIT("..", 2);
+ ino_t ino;
+
+ ino = ufs_inode_by_name(d_inode(child), &dot_dot);
+ if (!ino)
+ return ERR_PTR(-ENOENT);
+ return d_obtain_alias(ufs_iget(d_inode(child)->i_sb, ino));
+}
+
+static const struct export_operations ufs_export_ops = {
+ .fh_to_dentry = ufs_fh_to_dentry,
+ .fh_to_parent = ufs_fh_to_parent,
+ .get_parent = ufs_get_parent,
+};
+
+#ifdef CONFIG_UFS_DEBUG
+/*
+ * Print contents of ufs_super_block, useful for debugging
+ */
+static void ufs_print_super_stuff(struct super_block *sb,
+ struct ufs_super_block_first *usb1,
+ struct ufs_super_block_second *usb2,
+ struct ufs_super_block_third *usb3)
+{
+ u32 magic = fs32_to_cpu(sb, usb3->fs_magic);
+
+ pr_debug("ufs_print_super_stuff\n");
+ pr_debug(" magic: 0x%x\n", magic);
+ if (fs32_to_cpu(sb, usb3->fs_magic) == UFS2_MAGIC) {
+ pr_debug(" fs_size: %llu\n", (unsigned long long)
+ fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size));
+ pr_debug(" fs_dsize: %llu\n", (unsigned long long)
+ fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize));
+ pr_debug(" bsize: %u\n",
+ fs32_to_cpu(sb, usb1->fs_bsize));
+ pr_debug(" fsize: %u\n",
+ fs32_to_cpu(sb, usb1->fs_fsize));
+ pr_debug(" fs_volname: %s\n", usb2->fs_un.fs_u2.fs_volname);
+ pr_debug(" fs_sblockloc: %llu\n", (unsigned long long)
+ fs64_to_cpu(sb, usb2->fs_un.fs_u2.fs_sblockloc));
+ pr_debug(" cs_ndir(No of dirs): %llu\n", (unsigned long long)
+ fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir));
+ pr_debug(" cs_nbfree(No of free blocks): %llu\n",
+ (unsigned long long)
+ fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree));
+ pr_info(" cs_nifree(Num of free inodes): %llu\n",
+ (unsigned long long)
+ fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree));
+ pr_info(" cs_nffree(Num of free frags): %llu\n",
+ (unsigned long long)
+ fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree));
+ pr_info(" fs_maxsymlinklen: %u\n",
+ fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen));
+ } else {
+ pr_debug(" sblkno: %u\n", fs32_to_cpu(sb, usb1->fs_sblkno));
+ pr_debug(" cblkno: %u\n", fs32_to_cpu(sb, usb1->fs_cblkno));
+ pr_debug(" iblkno: %u\n", fs32_to_cpu(sb, usb1->fs_iblkno));
+ pr_debug(" dblkno: %u\n", fs32_to_cpu(sb, usb1->fs_dblkno));
+ pr_debug(" cgoffset: %u\n",
+ fs32_to_cpu(sb, usb1->fs_cgoffset));
+ pr_debug(" ~cgmask: 0x%x\n",
+ ~fs32_to_cpu(sb, usb1->fs_cgmask));
+ pr_debug(" size: %u\n", fs32_to_cpu(sb, usb1->fs_size));
+ pr_debug(" dsize: %u\n", fs32_to_cpu(sb, usb1->fs_dsize));
+ pr_debug(" ncg: %u\n", fs32_to_cpu(sb, usb1->fs_ncg));
+ pr_debug(" bsize: %u\n", fs32_to_cpu(sb, usb1->fs_bsize));
+ pr_debug(" fsize: %u\n", fs32_to_cpu(sb, usb1->fs_fsize));
+ pr_debug(" frag: %u\n", fs32_to_cpu(sb, usb1->fs_frag));
+ pr_debug(" fragshift: %u\n",
+ fs32_to_cpu(sb, usb1->fs_fragshift));
+ pr_debug(" ~fmask: %u\n", ~fs32_to_cpu(sb, usb1->fs_fmask));
+ pr_debug(" fshift: %u\n", fs32_to_cpu(sb, usb1->fs_fshift));
+ pr_debug(" sbsize: %u\n", fs32_to_cpu(sb, usb1->fs_sbsize));
+ pr_debug(" spc: %u\n", fs32_to_cpu(sb, usb1->fs_spc));
+ pr_debug(" cpg: %u\n", fs32_to_cpu(sb, usb1->fs_cpg));
+ pr_debug(" ipg: %u\n", fs32_to_cpu(sb, usb1->fs_ipg));
+ pr_debug(" fpg: %u\n", fs32_to_cpu(sb, usb1->fs_fpg));
+ pr_debug(" csaddr: %u\n", fs32_to_cpu(sb, usb1->fs_csaddr));
+ pr_debug(" cssize: %u\n", fs32_to_cpu(sb, usb1->fs_cssize));
+ pr_debug(" cgsize: %u\n", fs32_to_cpu(sb, usb1->fs_cgsize));
+ pr_debug(" fstodb: %u\n",
+ fs32_to_cpu(sb, usb1->fs_fsbtodb));
+ pr_debug(" nrpos: %u\n", fs32_to_cpu(sb, usb3->fs_nrpos));
+ pr_debug(" ndir %u\n",
+ fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir));
+ pr_debug(" nifree %u\n",
+ fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree));
+ pr_debug(" nbfree %u\n",
+ fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree));
+ pr_debug(" nffree %u\n",
+ fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree));
+ }
+ pr_debug("\n");
+}
+
+/*
+ * Print contents of ufs_cylinder_group, useful for debugging
+ */
+static void ufs_print_cylinder_stuff(struct super_block *sb,
+ struct ufs_cylinder_group *cg)
+{
+ pr_debug("\nufs_print_cylinder_stuff\n");
+ pr_debug("size of ucg: %zu\n", sizeof(struct ufs_cylinder_group));
+ pr_debug(" magic: %x\n", fs32_to_cpu(sb, cg->cg_magic));
+ pr_debug(" time: %u\n", fs32_to_cpu(sb, cg->cg_time));
+ pr_debug(" cgx: %u\n", fs32_to_cpu(sb, cg->cg_cgx));
+ pr_debug(" ncyl: %u\n", fs16_to_cpu(sb, cg->cg_ncyl));
+ pr_debug(" niblk: %u\n", fs16_to_cpu(sb, cg->cg_niblk));
+ pr_debug(" ndblk: %u\n", fs32_to_cpu(sb, cg->cg_ndblk));
+ pr_debug(" cs_ndir: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_ndir));
+ pr_debug(" cs_nbfree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nbfree));
+ pr_debug(" cs_nifree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nifree));
+ pr_debug(" cs_nffree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nffree));
+ pr_debug(" rotor: %u\n", fs32_to_cpu(sb, cg->cg_rotor));
+ pr_debug(" frotor: %u\n", fs32_to_cpu(sb, cg->cg_frotor));
+ pr_debug(" irotor: %u\n", fs32_to_cpu(sb, cg->cg_irotor));
+ pr_debug(" frsum: %u, %u, %u, %u, %u, %u, %u, %u\n",
+ fs32_to_cpu(sb, cg->cg_frsum[0]), fs32_to_cpu(sb, cg->cg_frsum[1]),
+ fs32_to_cpu(sb, cg->cg_frsum[2]), fs32_to_cpu(sb, cg->cg_frsum[3]),
+ fs32_to_cpu(sb, cg->cg_frsum[4]), fs32_to_cpu(sb, cg->cg_frsum[5]),
+ fs32_to_cpu(sb, cg->cg_frsum[6]), fs32_to_cpu(sb, cg->cg_frsum[7]));
+ pr_debug(" btotoff: %u\n", fs32_to_cpu(sb, cg->cg_btotoff));
+ pr_debug(" boff: %u\n", fs32_to_cpu(sb, cg->cg_boff));
+ pr_debug(" iuseoff: %u\n", fs32_to_cpu(sb, cg->cg_iusedoff));
+ pr_debug(" freeoff: %u\n", fs32_to_cpu(sb, cg->cg_freeoff));
+ pr_debug(" nextfreeoff: %u\n", fs32_to_cpu(sb, cg->cg_nextfreeoff));
+ pr_debug(" clustersumoff %u\n",
+ fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clustersumoff));
+ pr_debug(" clusteroff %u\n",
+ fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clusteroff));
+ pr_debug(" nclusterblks %u\n",
+ fs32_to_cpu(sb, cg->cg_u.cg_44.cg_nclusterblks));
+ pr_debug("\n");
+}
+#else
+# define ufs_print_super_stuff(sb, usb1, usb2, usb3) /**/
+# define ufs_print_cylinder_stuff(sb, cg) /**/
+#endif /* CONFIG_UFS_DEBUG */
+
+static const struct super_operations ufs_super_ops;
+
+void ufs_error (struct super_block * sb, const char * function,
+ const char * fmt, ...)
+{
+ struct ufs_sb_private_info * uspi;
+ struct ufs_super_block_first * usb1;
+ struct va_format vaf;
+ va_list args;
+
+ uspi = UFS_SB(sb)->s_uspi;
+ usb1 = ubh_get_usb_first(uspi);
+
+ if (!(sb->s_flags & MS_RDONLY)) {
+ usb1->fs_clean = UFS_FSBAD;
+ ubh_mark_buffer_dirty(USPI_UBH(uspi));
+ ufs_mark_sb_dirty(sb);
+ sb->s_flags |= MS_RDONLY;
+ }
+ va_start(args, fmt);
+ vaf.fmt = fmt;
+ vaf.va = &args;
+ switch (UFS_SB(sb)->s_mount_opt & UFS_MOUNT_ONERROR) {
+ case UFS_MOUNT_ONERROR_PANIC:
+ panic("panic (device %s): %s: %pV\n",
+ sb->s_id, function, &vaf);
+
+ case UFS_MOUNT_ONERROR_LOCK:
+ case UFS_MOUNT_ONERROR_UMOUNT:
+ case UFS_MOUNT_ONERROR_REPAIR:
+ pr_crit("error (device %s): %s: %pV\n",
+ sb->s_id, function, &vaf);
+ }
+ va_end(args);
+}
+
+void ufs_panic (struct super_block * sb, const char * function,
+ const char * fmt, ...)
+{
+ struct ufs_sb_private_info * uspi;
+ struct ufs_super_block_first * usb1;
+ struct va_format vaf;
+ va_list args;
+
+ uspi = UFS_SB(sb)->s_uspi;
+ usb1 = ubh_get_usb_first(uspi);
+
+ if (!(sb->s_flags & MS_RDONLY)) {
+ usb1->fs_clean = UFS_FSBAD;
+ ubh_mark_buffer_dirty(USPI_UBH(uspi));
+ ufs_mark_sb_dirty(sb);
+ }
+ va_start(args, fmt);
+ vaf.fmt = fmt;
+ vaf.va = &args;
+ sb->s_flags |= MS_RDONLY;
+ pr_crit("panic (device %s): %s: %pV\n",
+ sb->s_id, function, &vaf);
+ va_end(args);
+}
+
+void ufs_warning (struct super_block * sb, const char * function,
+ const char * fmt, ...)
+{
+ struct va_format vaf;
+ va_list args;
+
+ va_start(args, fmt);
+ vaf.fmt = fmt;
+ vaf.va = &args;
+ pr_warn("(device %s): %s: %pV\n",
+ sb->s_id, function, &vaf);
+ va_end(args);
+}
+
+enum {
+ Opt_type_old = UFS_MOUNT_UFSTYPE_OLD,
+ Opt_type_sunx86 = UFS_MOUNT_UFSTYPE_SUNx86,
+ Opt_type_sun = UFS_MOUNT_UFSTYPE_SUN,
+ Opt_type_sunos = UFS_MOUNT_UFSTYPE_SUNOS,
+ Opt_type_44bsd = UFS_MOUNT_UFSTYPE_44BSD,
+ Opt_type_ufs2 = UFS_MOUNT_UFSTYPE_UFS2,
+ Opt_type_hp = UFS_MOUNT_UFSTYPE_HP,
+ Opt_type_nextstepcd = UFS_MOUNT_UFSTYPE_NEXTSTEP_CD,
+ Opt_type_nextstep = UFS_MOUNT_UFSTYPE_NEXTSTEP,
+ Opt_type_openstep = UFS_MOUNT_UFSTYPE_OPENSTEP,
+ Opt_onerror_panic = UFS_MOUNT_ONERROR_PANIC,
+ Opt_onerror_lock = UFS_MOUNT_ONERROR_LOCK,
+ Opt_onerror_umount = UFS_MOUNT_ONERROR_UMOUNT,
+ Opt_onerror_repair = UFS_MOUNT_ONERROR_REPAIR,
+ Opt_err
+};
+
+static const match_table_t tokens = {
+ {Opt_type_old, "ufstype=old"},
+ {Opt_type_sunx86, "ufstype=sunx86"},
+ {Opt_type_sun, "ufstype=sun"},
+ {Opt_type_sunos, "ufstype=sunos"},
+ {Opt_type_44bsd, "ufstype=44bsd"},
+ {Opt_type_ufs2, "ufstype=ufs2"},
+ {Opt_type_ufs2, "ufstype=5xbsd"},
+ {Opt_type_hp, "ufstype=hp"},
+ {Opt_type_nextstepcd, "ufstype=nextstep-cd"},
+ {Opt_type_nextstep, "ufstype=nextstep"},
+ {Opt_type_openstep, "ufstype=openstep"},
+/*end of possible ufs types */
+ {Opt_onerror_panic, "onerror=panic"},
+ {Opt_onerror_lock, "onerror=lock"},
+ {Opt_onerror_umount, "onerror=umount"},
+ {Opt_onerror_repair, "onerror=repair"},
+ {Opt_err, NULL}
+};
+
+static int ufs_parse_options (char * options, unsigned * mount_options)
+{
+ char * p;
+
+ UFSD("ENTER\n");
+
+ if (!options)
+ return 1;
+
+ while ((p = strsep(&options, ",")) != NULL) {
+ substring_t args[MAX_OPT_ARGS];
+ int token;
+ if (!*p)
+ continue;
+
+ token = match_token(p, tokens, args);
+ switch (token) {
+ case Opt_type_old:
+ ufs_clear_opt (*mount_options, UFSTYPE);
+ ufs_set_opt (*mount_options, UFSTYPE_OLD);
+ break;
+ case Opt_type_sunx86:
+ ufs_clear_opt (*mount_options, UFSTYPE);
+ ufs_set_opt (*mount_options, UFSTYPE_SUNx86);
+ break;
+ case Opt_type_sun:
+ ufs_clear_opt (*mount_options, UFSTYPE);
+ ufs_set_opt (*mount_options, UFSTYPE_SUN);
+ break;
+ case Opt_type_sunos:
+ ufs_clear_opt(*mount_options, UFSTYPE);
+ ufs_set_opt(*mount_options, UFSTYPE_SUNOS);
+ break;
+ case Opt_type_44bsd:
+ ufs_clear_opt (*mount_options, UFSTYPE);
+ ufs_set_opt (*mount_options, UFSTYPE_44BSD);
+ break;
+ case Opt_type_ufs2:
+ ufs_clear_opt(*mount_options, UFSTYPE);
+ ufs_set_opt(*mount_options, UFSTYPE_UFS2);
+ break;
+ case Opt_type_hp:
+ ufs_clear_opt (*mount_options, UFSTYPE);
+ ufs_set_opt (*mount_options, UFSTYPE_HP);
+ break;
+ case Opt_type_nextstepcd:
+ ufs_clear_opt (*mount_options, UFSTYPE);
+ ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP_CD);
+ break;
+ case Opt_type_nextstep:
+ ufs_clear_opt (*mount_options, UFSTYPE);
+ ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP);
+ break;
+ case Opt_type_openstep:
+ ufs_clear_opt (*mount_options, UFSTYPE);
+ ufs_set_opt (*mount_options, UFSTYPE_OPENSTEP);
+ break;
+ case Opt_onerror_panic:
+ ufs_clear_opt (*mount_options, ONERROR);
+ ufs_set_opt (*mount_options, ONERROR_PANIC);
+ break;
+ case Opt_onerror_lock:
+ ufs_clear_opt (*mount_options, ONERROR);
+ ufs_set_opt (*mount_options, ONERROR_LOCK);
+ break;
+ case Opt_onerror_umount:
+ ufs_clear_opt (*mount_options, ONERROR);
+ ufs_set_opt (*mount_options, ONERROR_UMOUNT);
+ break;
+ case Opt_onerror_repair:
+ pr_err("Unable to do repair on error, will lock lock instead\n");
+ ufs_clear_opt (*mount_options, ONERROR);
+ ufs_set_opt (*mount_options, ONERROR_REPAIR);
+ break;
+ default:
+ pr_err("Invalid option: \"%s\" or missing value\n", p);
+ return 0;
+ }
+ }
+ return 1;
+}
+
+/*
+ * Different types of UFS hold fs_cstotal in different
+ * places, and use different data structure for it.
+ * To make things simpler we just copy fs_cstotal to ufs_sb_private_info
+ */
+static void ufs_setup_cstotal(struct super_block *sb)
+{
+ struct ufs_sb_info *sbi = UFS_SB(sb);
+ struct ufs_sb_private_info *uspi = sbi->s_uspi;
+ struct ufs_super_block_first *usb1;
+ struct ufs_super_block_second *usb2;
+ struct ufs_super_block_third *usb3;
+ unsigned mtype = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE;
+
+ UFSD("ENTER, mtype=%u\n", mtype);
+ usb1 = ubh_get_usb_first(uspi);
+ usb2 = ubh_get_usb_second(uspi);
+ usb3 = ubh_get_usb_third(uspi);
+
+ if ((mtype == UFS_MOUNT_UFSTYPE_44BSD &&
+ (usb1->fs_flags & UFS_FLAGS_UPDATED)) ||
+ mtype == UFS_MOUNT_UFSTYPE_UFS2) {
+ /*we have statistic in different place, then usual*/
+ uspi->cs_total.cs_ndir = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir);
+ uspi->cs_total.cs_nbfree = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree);
+ uspi->cs_total.cs_nifree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree);
+ uspi->cs_total.cs_nffree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree);
+ } else {
+ uspi->cs_total.cs_ndir = fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir);
+ uspi->cs_total.cs_nbfree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree);
+ uspi->cs_total.cs_nifree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree);
+ uspi->cs_total.cs_nffree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree);
+ }
+ UFSD("EXIT\n");
+}
+
+/*
+ * Read on-disk structures associated with cylinder groups
+ */
+static int ufs_read_cylinder_structures(struct super_block *sb)
+{
+ struct ufs_sb_info *sbi = UFS_SB(sb);
+ struct ufs_sb_private_info *uspi = sbi->s_uspi;
+ struct ufs_buffer_head * ubh;
+ unsigned char * base, * space;
+ unsigned size, blks, i;
+
+ UFSD("ENTER\n");
+
+ /*
+ * Read cs structures from (usually) first data block
+ * on the device.
+ */
+ size = uspi->s_cssize;
+ blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
+ base = space = kmalloc(size, GFP_NOFS);
+ if (!base)
+ goto failed;
+ sbi->s_csp = (struct ufs_csum *)space;
+ for (i = 0; i < blks; i += uspi->s_fpb) {
+ size = uspi->s_bsize;
+ if (i + uspi->s_fpb > blks)
+ size = (blks - i) * uspi->s_fsize;
+
+ ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
+
+ if (!ubh)
+ goto failed;
+
+ ubh_ubhcpymem (space, ubh, size);
+
+ space += size;
+ ubh_brelse (ubh);
+ ubh = NULL;
+ }
+
+ /*
+ * Read cylinder group (we read only first fragment from block
+ * at this time) and prepare internal data structures for cg caching.
+ */
+ if (!(sbi->s_ucg = kmalloc (sizeof(struct buffer_head *) * uspi->s_ncg, GFP_NOFS)))
+ goto failed;
+ for (i = 0; i < uspi->s_ncg; i++)
+ sbi->s_ucg[i] = NULL;
+ for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
+ sbi->s_ucpi[i] = NULL;
+ sbi->s_cgno[i] = UFS_CGNO_EMPTY;
+ }
+ for (i = 0; i < uspi->s_ncg; i++) {
+ UFSD("read cg %u\n", i);
+ if (!(sbi->s_ucg[i] = sb_bread(sb, ufs_cgcmin(i))))
+ goto failed;
+ if (!ufs_cg_chkmagic (sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data))
+ goto failed;
+
+ ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data);
+ }
+ for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
+ if (!(sbi->s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_NOFS)))
+ goto failed;
+ sbi->s_cgno[i] = UFS_CGNO_EMPTY;
+ }
+ sbi->s_cg_loaded = 0;
+ UFSD("EXIT\n");
+ return 1;
+
+failed:
+ kfree (base);
+ if (sbi->s_ucg) {
+ for (i = 0; i < uspi->s_ncg; i++)
+ if (sbi->s_ucg[i])
+ brelse (sbi->s_ucg[i]);
+ kfree (sbi->s_ucg);
+ for (i = 0; i < UFS_MAX_GROUP_LOADED; i++)
+ kfree (sbi->s_ucpi[i]);
+ }
+ UFSD("EXIT (FAILED)\n");
+ return 0;
+}
+
+/*
+ * Sync our internal copy of fs_cstotal with disk
+ */
+static void ufs_put_cstotal(struct super_block *sb)
+{
+ unsigned mtype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
+ struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
+ struct ufs_super_block_first *usb1;
+ struct ufs_super_block_second *usb2;
+ struct ufs_super_block_third *usb3;
+
+ UFSD("ENTER\n");
+ usb1 = ubh_get_usb_first(uspi);
+ usb2 = ubh_get_usb_second(uspi);
+ usb3 = ubh_get_usb_third(uspi);
+
+ if ((mtype == UFS_MOUNT_UFSTYPE_44BSD &&
+ (usb1->fs_flags & UFS_FLAGS_UPDATED)) ||
+ mtype == UFS_MOUNT_UFSTYPE_UFS2) {
+ /*we have statistic in different place, then usual*/
+ usb2->fs_un.fs_u2.cs_ndir =
+ cpu_to_fs64(sb, uspi->cs_total.cs_ndir);
+ usb2->fs_un.fs_u2.cs_nbfree =
+ cpu_to_fs64(sb, uspi->cs_total.cs_nbfree);
+ usb3->fs_un1.fs_u2.cs_nifree =
+ cpu_to_fs64(sb, uspi->cs_total.cs_nifree);
+ usb3->fs_un1.fs_u2.cs_nffree =
+ cpu_to_fs64(sb, uspi->cs_total.cs_nffree);
+ } else {
+ usb1->fs_cstotal.cs_ndir =
+ cpu_to_fs32(sb, uspi->cs_total.cs_ndir);
+ usb1->fs_cstotal.cs_nbfree =
+ cpu_to_fs32(sb, uspi->cs_total.cs_nbfree);
+ usb1->fs_cstotal.cs_nifree =
+ cpu_to_fs32(sb, uspi->cs_total.cs_nifree);
+ usb1->fs_cstotal.cs_nffree =
+ cpu_to_fs32(sb, uspi->cs_total.cs_nffree);
+ }
+ ubh_mark_buffer_dirty(USPI_UBH(uspi));
+ ufs_print_super_stuff(sb, usb1, usb2, usb3);
+ UFSD("EXIT\n");
+}
+
+/**
+ * ufs_put_super_internal() - put on-disk intrenal structures
+ * @sb: pointer to super_block structure
+ * Put on-disk structures associated with cylinder groups
+ * and write them back to disk, also update cs_total on disk
+ */
+static void ufs_put_super_internal(struct super_block *sb)
+{
+ struct ufs_sb_info *sbi = UFS_SB(sb);
+ struct ufs_sb_private_info *uspi = sbi->s_uspi;
+ struct ufs_buffer_head * ubh;
+ unsigned char * base, * space;
+ unsigned blks, size, i;
+
+
+ UFSD("ENTER\n");
+
+ ufs_put_cstotal(sb);
+ size = uspi->s_cssize;
+ blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
+ base = space = (char*) sbi->s_csp;
+ for (i = 0; i < blks; i += uspi->s_fpb) {
+ size = uspi->s_bsize;
+ if (i + uspi->s_fpb > blks)
+ size = (blks - i) * uspi->s_fsize;
+
+ ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
+
+ ubh_memcpyubh (ubh, space, size);
+ space += size;
+ ubh_mark_buffer_uptodate (ubh, 1);
+ ubh_mark_buffer_dirty (ubh);
+ ubh_brelse (ubh);
+ }
+ for (i = 0; i < sbi->s_cg_loaded; i++) {
+ ufs_put_cylinder (sb, i);
+ kfree (sbi->s_ucpi[i]);
+ }
+ for (; i < UFS_MAX_GROUP_LOADED; i++)
+ kfree (sbi->s_ucpi[i]);
+ for (i = 0; i < uspi->s_ncg; i++)
+ brelse (sbi->s_ucg[i]);
+ kfree (sbi->s_ucg);
+ kfree (base);
+
+ UFSD("EXIT\n");
+}
+
+static int ufs_sync_fs(struct super_block *sb, int wait)
+{
+ struct ufs_sb_private_info * uspi;
+ struct ufs_super_block_first * usb1;
+ struct ufs_super_block_third * usb3;
+ unsigned flags;
+
+ lock_ufs(sb);
+ mutex_lock(&UFS_SB(sb)->s_lock);
+
+ UFSD("ENTER\n");
+
+ flags = UFS_SB(sb)->s_flags;
+ uspi = UFS_SB(sb)->s_uspi;
+ usb1 = ubh_get_usb_first(uspi);
+ usb3 = ubh_get_usb_third(uspi);
+
+ usb1->fs_time = cpu_to_fs32(sb, get_seconds());
+ if ((flags & UFS_ST_MASK) == UFS_ST_SUN ||
+ (flags & UFS_ST_MASK) == UFS_ST_SUNOS ||
+ (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
+ ufs_set_fs_state(sb, usb1, usb3,
+ UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
+ ufs_put_cstotal(sb);
+
+ UFSD("EXIT\n");
+ mutex_unlock(&UFS_SB(sb)->s_lock);
+ unlock_ufs(sb);
+
+ return 0;
+}
+
+static void delayed_sync_fs(struct work_struct *work)
+{
+ struct ufs_sb_info *sbi;
+
+ sbi = container_of(work, struct ufs_sb_info, sync_work.work);
+
+ spin_lock(&sbi->work_lock);
+ sbi->work_queued = 0;
+ spin_unlock(&sbi->work_lock);
+
+ ufs_sync_fs(sbi->sb, 1);
+}
+
+void ufs_mark_sb_dirty(struct super_block *sb)
+{
+ struct ufs_sb_info *sbi = UFS_SB(sb);
+ unsigned long delay;
+
+ spin_lock(&sbi->work_lock);
+ if (!sbi->work_queued) {
+ delay = msecs_to_jiffies(dirty_writeback_interval * 10);
+ queue_delayed_work(system_long_wq, &sbi->sync_work, delay);
+ sbi->work_queued = 1;
+ }
+ spin_unlock(&sbi->work_lock);
+}
+
+static void ufs_put_super(struct super_block *sb)
+{
+ struct ufs_sb_info * sbi = UFS_SB(sb);
+
+ UFSD("ENTER\n");
+
+ if (!(sb->s_flags & MS_RDONLY))
+ ufs_put_super_internal(sb);
+ cancel_delayed_work_sync(&sbi->sync_work);
+
+ ubh_brelse_uspi (sbi->s_uspi);
+ kfree (sbi->s_uspi);
+ mutex_destroy(&sbi->mutex);
+ kfree (sbi);
+ sb->s_fs_info = NULL;
+ UFSD("EXIT\n");
+ return;
+}
+
+static int ufs_fill_super(struct super_block *sb, void *data, int silent)
+{
+ struct ufs_sb_info * sbi;
+ struct ufs_sb_private_info * uspi;
+ struct ufs_super_block_first * usb1;
+ struct ufs_super_block_second * usb2;
+ struct ufs_super_block_third * usb3;
+ struct ufs_buffer_head * ubh;
+ struct inode *inode;
+ unsigned block_size, super_block_size;
+ unsigned flags;
+ unsigned super_block_offset;
+ unsigned maxsymlen;
+ int ret = -EINVAL;
+
+ uspi = NULL;
+ ubh = NULL;
+ flags = 0;
+
+ UFSD("ENTER\n");
+
+#ifndef CONFIG_UFS_FS_WRITE
+ if (!(sb->s_flags & MS_RDONLY)) {
+ pr_err("ufs was compiled with read-only support, can't be mounted as read-write\n");
+ return -EROFS;
+ }
+#endif
+
+ sbi = kzalloc(sizeof(struct ufs_sb_info), GFP_KERNEL);
+ if (!sbi)
+ goto failed_nomem;
+ sb->s_fs_info = sbi;
+ sbi->sb = sb;
+
+ UFSD("flag %u\n", (int)(sb->s_flags & MS_RDONLY));
+
+ mutex_init(&sbi->mutex);
+ mutex_init(&sbi->s_lock);
+ spin_lock_init(&sbi->work_lock);
+ INIT_DELAYED_WORK(&sbi->sync_work, delayed_sync_fs);
+ /*
+ * Set default mount options
+ * Parse mount options
+ */
+ sbi->s_mount_opt = 0;
+ ufs_set_opt (sbi->s_mount_opt, ONERROR_LOCK);
+ if (!ufs_parse_options ((char *) data, &sbi->s_mount_opt)) {
+ pr_err("wrong mount options\n");
+ goto failed;
+ }
+ if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) {
+ if (!silent)
+ pr_err("You didn't specify the type of your ufs filesystem\n\n"
+ "mount -t ufs -o ufstype="
+ "sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...\n\n"
+ ">>>WARNING<<< Wrong ufstype may corrupt your filesystem, "
+ "default is ufstype=old\n");
+ ufs_set_opt (sbi->s_mount_opt, UFSTYPE_OLD);
+ }
+
+ uspi = kzalloc(sizeof(struct ufs_sb_private_info), GFP_KERNEL);
+ sbi->s_uspi = uspi;
+ if (!uspi)
+ goto failed;
+ uspi->s_dirblksize = UFS_SECTOR_SIZE;
+ super_block_offset=UFS_SBLOCK;
+
+ /* Keep 2Gig file limit. Some UFS variants need to override
+ this but as I don't know which I'll let those in the know loosen
+ the rules */
+ switch (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) {
+ case UFS_MOUNT_UFSTYPE_44BSD:
+ UFSD("ufstype=44bsd\n");
+ uspi->s_fsize = block_size = 512;
+ uspi->s_fmask = ~(512 - 1);
+ uspi->s_fshift = 9;
+ uspi->s_sbsize = super_block_size = 1536;
+ uspi->s_sbbase = 0;
+ flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
+ break;
+ case UFS_MOUNT_UFSTYPE_UFS2:
+ UFSD("ufstype=ufs2\n");
+ super_block_offset=SBLOCK_UFS2;
+ uspi->s_fsize = block_size = 512;
+ uspi->s_fmask = ~(512 - 1);
+ uspi->s_fshift = 9;
+ uspi->s_sbsize = super_block_size = 1536;
+ uspi->s_sbbase = 0;
+ flags |= UFS_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
+ break;
+
+ case UFS_MOUNT_UFSTYPE_SUN:
+ UFSD("ufstype=sun\n");
+ uspi->s_fsize = block_size = 1024;
+ uspi->s_fmask = ~(1024 - 1);
+ uspi->s_fshift = 10;
+ uspi->s_sbsize = super_block_size = 2048;
+ uspi->s_sbbase = 0;
+ uspi->s_maxsymlinklen = 0; /* Not supported on disk */
+ flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN;
+ break;
+
+ case UFS_MOUNT_UFSTYPE_SUNOS:
+ UFSD("ufstype=sunos\n");
+ uspi->s_fsize = block_size = 1024;
+ uspi->s_fmask = ~(1024 - 1);
+ uspi->s_fshift = 10;
+ uspi->s_sbsize = 2048;
+ super_block_size = 2048;
+ uspi->s_sbbase = 0;
+ uspi->s_maxsymlinklen = 0; /* Not supported on disk */
+ flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_SUNOS | UFS_CG_SUN;
+ break;
+
+ case UFS_MOUNT_UFSTYPE_SUNx86:
+ UFSD("ufstype=sunx86\n");
+ uspi->s_fsize = block_size = 1024;
+ uspi->s_fmask = ~(1024 - 1);
+ uspi->s_fshift = 10;
+ uspi->s_sbsize = super_block_size = 2048;
+ uspi->s_sbbase = 0;
+ uspi->s_maxsymlinklen = 0; /* Not supported on disk */
+ flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN;
+ break;
+
+ case UFS_MOUNT_UFSTYPE_OLD:
+ UFSD("ufstype=old\n");
+ uspi->s_fsize = block_size = 1024;
+ uspi->s_fmask = ~(1024 - 1);
+ uspi->s_fshift = 10;
+ uspi->s_sbsize = super_block_size = 2048;
+ uspi->s_sbbase = 0;
+ flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
+ if (!(sb->s_flags & MS_RDONLY)) {
+ if (!silent)
+ pr_info("ufstype=old is supported read-only\n");
+ sb->s_flags |= MS_RDONLY;
+ }
+ break;
+
+ case UFS_MOUNT_UFSTYPE_NEXTSTEP:
+ UFSD("ufstype=nextstep\n");
+ uspi->s_fsize = block_size = 1024;
+ uspi->s_fmask = ~(1024 - 1);
+ uspi->s_fshift = 10;
+ uspi->s_sbsize = super_block_size = 2048;
+ uspi->s_sbbase = 0;
+ uspi->s_dirblksize = 1024;
+ flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
+ if (!(sb->s_flags & MS_RDONLY)) {
+ if (!silent)
+ pr_info("ufstype=nextstep is supported read-only\n");
+ sb->s_flags |= MS_RDONLY;
+ }
+ break;
+
+ case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD:
+ UFSD("ufstype=nextstep-cd\n");
+ uspi->s_fsize = block_size = 2048;
+ uspi->s_fmask = ~(2048 - 1);
+ uspi->s_fshift = 11;
+ uspi->s_sbsize = super_block_size = 2048;
+ uspi->s_sbbase = 0;
+ uspi->s_dirblksize = 1024;
+ flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
+ if (!(sb->s_flags & MS_RDONLY)) {
+ if (!silent)
+ pr_info("ufstype=nextstep-cd is supported read-only\n");
+ sb->s_flags |= MS_RDONLY;
+ }
+ break;
+
+ case UFS_MOUNT_UFSTYPE_OPENSTEP:
+ UFSD("ufstype=openstep\n");
+ uspi->s_fsize = block_size = 1024;
+ uspi->s_fmask = ~(1024 - 1);
+ uspi->s_fshift = 10;
+ uspi->s_sbsize = super_block_size = 2048;
+ uspi->s_sbbase = 0;
+ uspi->s_dirblksize = 1024;
+ flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
+ if (!(sb->s_flags & MS_RDONLY)) {
+ if (!silent)
+ pr_info("ufstype=openstep is supported read-only\n");
+ sb->s_flags |= MS_RDONLY;
+ }
+ break;
+
+ case UFS_MOUNT_UFSTYPE_HP:
+ UFSD("ufstype=hp\n");
+ uspi->s_fsize = block_size = 1024;
+ uspi->s_fmask = ~(1024 - 1);
+ uspi->s_fshift = 10;
+ uspi->s_sbsize = super_block_size = 2048;
+ uspi->s_sbbase = 0;
+ flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
+ if (!(sb->s_flags & MS_RDONLY)) {
+ if (!silent)
+ pr_info("ufstype=hp is supported read-only\n");
+ sb->s_flags |= MS_RDONLY;
+ }
+ break;
+ default:
+ if (!silent)
+ pr_err("unknown ufstype\n");
+ goto failed;
+ }
+
+again:
+ if (!sb_set_blocksize(sb, block_size)) {
+ pr_err("failed to set blocksize\n");
+ goto failed;
+ }
+
+ /*
+ * read ufs super block from device
+ */
+
+ ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + super_block_offset/block_size, super_block_size);
+
+ if (!ubh)
+ goto failed;
+
+ usb1 = ubh_get_usb_first(uspi);
+ usb2 = ubh_get_usb_second(uspi);
+ usb3 = ubh_get_usb_third(uspi);
+
+ /* Sort out mod used on SunOS 4.1.3 for fs_state */
+ uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat);
+ if (((flags & UFS_ST_MASK) == UFS_ST_SUNOS) &&
+ (uspi->s_postblformat != UFS_42POSTBLFMT)) {
+ flags &= ~UFS_ST_MASK;
+ flags |= UFS_ST_SUN;
+ }
+
+ /*
+ * Check ufs magic number
+ */
+ sbi->s_bytesex = BYTESEX_LE;
+ switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
+ case UFS_MAGIC:
+ case UFS_MAGIC_BW:
+ case UFS2_MAGIC:
+ case UFS_MAGIC_LFN:
+ case UFS_MAGIC_FEA:
+ case UFS_MAGIC_4GB:
+ goto magic_found;
+ }
+ sbi->s_bytesex = BYTESEX_BE;
+ switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
+ case UFS_MAGIC:
+ case UFS_MAGIC_BW:
+ case UFS2_MAGIC:
+ case UFS_MAGIC_LFN:
+ case UFS_MAGIC_FEA:
+ case UFS_MAGIC_4GB:
+ goto magic_found;
+ }
+
+ if ((((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP)
+ || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD)
+ || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP))
+ && uspi->s_sbbase < 256) {
+ ubh_brelse_uspi(uspi);
+ ubh = NULL;
+ uspi->s_sbbase += 8;
+ goto again;
+ }
+ if (!silent)
+ pr_err("%s(): bad magic number\n", __func__);
+ goto failed;
+
+magic_found:
+ /*
+ * Check block and fragment sizes
+ */
+ uspi->s_bsize = fs32_to_cpu(sb, usb1->fs_bsize);
+ uspi->s_fsize = fs32_to_cpu(sb, usb1->fs_fsize);
+ uspi->s_sbsize = fs32_to_cpu(sb, usb1->fs_sbsize);
+ uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
+ uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
+
+ if (!is_power_of_2(uspi->s_fsize)) {
+ pr_err("%s(): fragment size %u is not a power of 2\n",
+ __func__, uspi->s_fsize);
+ goto failed;
+ }
+ if (uspi->s_fsize < 512) {
+ pr_err("%s(): fragment size %u is too small\n",
+ __func__, uspi->s_fsize);
+ goto failed;
+ }
+ if (uspi->s_fsize > 4096) {
+ pr_err("%s(): fragment size %u is too large\n",
+ __func__, uspi->s_fsize);
+ goto failed;
+ }
+ if (!is_power_of_2(uspi->s_bsize)) {
+ pr_err("%s(): block size %u is not a power of 2\n",
+ __func__, uspi->s_bsize);
+ goto failed;
+ }
+ if (uspi->s_bsize < 4096) {
+ pr_err("%s(): block size %u is too small\n",
+ __func__, uspi->s_bsize);
+ goto failed;
+ }
+ if (uspi->s_bsize / uspi->s_fsize > 8) {
+ pr_err("%s(): too many fragments per block (%u)\n",
+ __func__, uspi->s_bsize / uspi->s_fsize);
+ goto failed;
+ }
+ if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) {
+ ubh_brelse_uspi(uspi);
+ ubh = NULL;
+ block_size = uspi->s_fsize;
+ super_block_size = uspi->s_sbsize;
+ UFSD("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size);
+ goto again;
+ }
+
+ sbi->s_flags = flags;/*after that line some functions use s_flags*/
+ ufs_print_super_stuff(sb, usb1, usb2, usb3);
+
+ /*
+ * Check, if file system was correctly unmounted.
+ * If not, make it read only.
+ */
+ if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) ||
+ ((flags & UFS_ST_MASK) == UFS_ST_OLD) ||
+ (((flags & UFS_ST_MASK) == UFS_ST_SUN ||
+ (flags & UFS_ST_MASK) == UFS_ST_SUNOS ||
+ (flags & UFS_ST_MASK) == UFS_ST_SUNx86) &&
+ (ufs_get_fs_state(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time))))) {
+ switch(usb1->fs_clean) {
+ case UFS_FSCLEAN:
+ UFSD("fs is clean\n");
+ break;
+ case UFS_FSSTABLE:
+ UFSD("fs is stable\n");
+ break;
+ case UFS_FSLOG:
+ UFSD("fs is logging fs\n");
+ break;
+ case UFS_FSOSF1:
+ UFSD("fs is DEC OSF/1\n");
+ break;
+ case UFS_FSACTIVE:
+ pr_err("%s(): fs is active\n", __func__);
+ sb->s_flags |= MS_RDONLY;
+ break;
+ case UFS_FSBAD:
+ pr_err("%s(): fs is bad\n", __func__);
+ sb->s_flags |= MS_RDONLY;
+ break;
+ default:
+ pr_err("%s(): can't grok fs_clean 0x%x\n",
+ __func__, usb1->fs_clean);
+ sb->s_flags |= MS_RDONLY;
+ break;
+ }
+ } else {
+ pr_err("%s(): fs needs fsck\n", __func__);
+ sb->s_flags |= MS_RDONLY;
+ }
+
+ /*
+ * Read ufs_super_block into internal data structures
+ */
+ sb->s_op = &ufs_super_ops;
+ sb->s_export_op = &ufs_export_ops;
+
+ sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic);
+
+ uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno);
+ uspi->s_cblkno = fs32_to_cpu(sb, usb1->fs_cblkno);
+ uspi->s_iblkno = fs32_to_cpu(sb, usb1->fs_iblkno);
+ uspi->s_dblkno = fs32_to_cpu(sb, usb1->fs_dblkno);
+ uspi->s_cgoffset = fs32_to_cpu(sb, usb1->fs_cgoffset);
+ uspi->s_cgmask = fs32_to_cpu(sb, usb1->fs_cgmask);
+
+ if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
+ uspi->s_u2_size = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size);
+ uspi->s_u2_dsize = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
+ } else {
+ uspi->s_size = fs32_to_cpu(sb, usb1->fs_size);
+ uspi->s_dsize = fs32_to_cpu(sb, usb1->fs_dsize);
+ }
+
+ uspi->s_ncg = fs32_to_cpu(sb, usb1->fs_ncg);
+ /* s_bsize already set */
+ /* s_fsize already set */
+ uspi->s_fpb = fs32_to_cpu(sb, usb1->fs_frag);
+ uspi->s_minfree = fs32_to_cpu(sb, usb1->fs_minfree);
+ uspi->s_bmask = fs32_to_cpu(sb, usb1->fs_bmask);
+ uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
+ uspi->s_bshift = fs32_to_cpu(sb, usb1->fs_bshift);
+ uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
+ UFSD("uspi->s_bshift = %d,uspi->s_fshift = %d", uspi->s_bshift,
+ uspi->s_fshift);
+ uspi->s_fpbshift = fs32_to_cpu(sb, usb1->fs_fragshift);
+ uspi->s_fsbtodb = fs32_to_cpu(sb, usb1->fs_fsbtodb);
+ /* s_sbsize already set */
+ uspi->s_csmask = fs32_to_cpu(sb, usb1->fs_csmask);
+ uspi->s_csshift = fs32_to_cpu(sb, usb1->fs_csshift);
+ uspi->s_nindir = fs32_to_cpu(sb, usb1->fs_nindir);
+ uspi->s_inopb = fs32_to_cpu(sb, usb1->fs_inopb);
+ uspi->s_nspf = fs32_to_cpu(sb, usb1->fs_nspf);
+ uspi->s_npsect = ufs_get_fs_npsect(sb, usb1, usb3);
+ uspi->s_interleave = fs32_to_cpu(sb, usb1->fs_interleave);
+ uspi->s_trackskew = fs32_to_cpu(sb, usb1->fs_trackskew);
+
+ if (uspi->fs_magic == UFS2_MAGIC)
+ uspi->s_csaddr = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_csaddr);
+ else
+ uspi->s_csaddr = fs32_to_cpu(sb, usb1->fs_csaddr);
+
+ uspi->s_cssize = fs32_to_cpu(sb, usb1->fs_cssize);
+ uspi->s_cgsize = fs32_to_cpu(sb, usb1->fs_cgsize);
+ uspi->s_ntrak = fs32_to_cpu(sb, usb1->fs_ntrak);
+ uspi->s_nsect = fs32_to_cpu(sb, usb1->fs_nsect);
+ uspi->s_spc = fs32_to_cpu(sb, usb1->fs_spc);
+ uspi->s_ipg = fs32_to_cpu(sb, usb1->fs_ipg);
+ uspi->s_fpg = fs32_to_cpu(sb, usb1->fs_fpg);
+ uspi->s_cpc = fs32_to_cpu(sb, usb2->fs_un.fs_u1.fs_cpc);
+ uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_contigsumsize);
+ uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3);
+ uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3);
+ uspi->s_nrpos = fs32_to_cpu(sb, usb3->fs_nrpos);
+ uspi->s_postbloff = fs32_to_cpu(sb, usb3->fs_postbloff);
+ uspi->s_rotbloff = fs32_to_cpu(sb, usb3->fs_rotbloff);
+
+ /*
+ * Compute another frequently used values
+ */
+ uspi->s_fpbmask = uspi->s_fpb - 1;
+ if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
+ uspi->s_apbshift = uspi->s_bshift - 3;
+ else
+ uspi->s_apbshift = uspi->s_bshift - 2;
+
+ uspi->s_2apbshift = uspi->s_apbshift * 2;
+ uspi->s_3apbshift = uspi->s_apbshift * 3;
+ uspi->s_apb = 1 << uspi->s_apbshift;
+ uspi->s_2apb = 1 << uspi->s_2apbshift;
+ uspi->s_3apb = 1 << uspi->s_3apbshift;
+ uspi->s_apbmask = uspi->s_apb - 1;
+ uspi->s_nspfshift = uspi->s_fshift - UFS_SECTOR_BITS;
+ uspi->s_nspb = uspi->s_nspf << uspi->s_fpbshift;
+ uspi->s_inopf = uspi->s_inopb >> uspi->s_fpbshift;
+ uspi->s_bpf = uspi->s_fsize << 3;
+ uspi->s_bpfshift = uspi->s_fshift + 3;
+ uspi->s_bpfmask = uspi->s_bpf - 1;
+ if ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_44BSD ||
+ (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_UFS2)
+ uspi->s_maxsymlinklen =
+ fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen);
+
+ if (uspi->fs_magic == UFS2_MAGIC)
+ maxsymlen = 2 * 4 * (UFS_NDADDR + UFS_NINDIR);
+ else
+ maxsymlen = 4 * (UFS_NDADDR + UFS_NINDIR);
+ if (uspi->s_maxsymlinklen > maxsymlen) {
+ ufs_warning(sb, __func__, "ufs_read_super: excessive maximum "
+ "fast symlink size (%u)\n", uspi->s_maxsymlinklen);
+ uspi->s_maxsymlinklen = maxsymlen;
+ }
+ sb->s_max_links = UFS_LINK_MAX;
+
+ inode = ufs_iget(sb, UFS_ROOTINO);
+ if (IS_ERR(inode)) {
+ ret = PTR_ERR(inode);
+ goto failed;
+ }
+ sb->s_root = d_make_root(inode);
+ if (!sb->s_root) {
+ ret = -ENOMEM;
+ goto failed;
+ }
+
+ ufs_setup_cstotal(sb);
+ /*
+ * Read cylinder group structures
+ */
+ if (!(sb->s_flags & MS_RDONLY))
+ if (!ufs_read_cylinder_structures(sb))
+ goto failed;
+
+ UFSD("EXIT\n");
+ return 0;
+
+failed:
+ mutex_destroy(&sbi->mutex);
+ if (ubh)
+ ubh_brelse_uspi (uspi);
+ kfree (uspi);
+ kfree(sbi);
+ sb->s_fs_info = NULL;
+ UFSD("EXIT (FAILED)\n");
+ return ret;
+
+failed_nomem:
+ UFSD("EXIT (NOMEM)\n");
+ return -ENOMEM;
+}
+
+static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
+{
+ struct ufs_sb_private_info * uspi;
+ struct ufs_super_block_first * usb1;
+ struct ufs_super_block_third * usb3;
+ unsigned new_mount_opt, ufstype;
+ unsigned flags;
+
+ sync_filesystem(sb);
+ lock_ufs(sb);
+ mutex_lock(&UFS_SB(sb)->s_lock);
+ uspi = UFS_SB(sb)->s_uspi;
+ flags = UFS_SB(sb)->s_flags;
+ usb1 = ubh_get_usb_first(uspi);
+ usb3 = ubh_get_usb_third(uspi);
+
+ /*
+ * Allow the "check" option to be passed as a remount option.
+ * It is not possible to change ufstype option during remount
+ */
+ ufstype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
+ new_mount_opt = 0;
+ ufs_set_opt (new_mount_opt, ONERROR_LOCK);
+ if (!ufs_parse_options (data, &new_mount_opt)) {
+ mutex_unlock(&UFS_SB(sb)->s_lock);
+ unlock_ufs(sb);
+ return -EINVAL;
+ }
+ if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) {
+ new_mount_opt |= ufstype;
+ } else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) {
+ pr_err("ufstype can't be changed during remount\n");
+ mutex_unlock(&UFS_SB(sb)->s_lock);
+ unlock_ufs(sb);
+ return -EINVAL;
+ }
+
+ if ((*mount_flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) {
+ UFS_SB(sb)->s_mount_opt = new_mount_opt;
+ mutex_unlock(&UFS_SB(sb)->s_lock);
+ unlock_ufs(sb);
+ return 0;
+ }
+
+ /*
+ * fs was mouted as rw, remounting ro
+ */
+ if (*mount_flags & MS_RDONLY) {
+ ufs_put_super_internal(sb);
+ usb1->fs_time = cpu_to_fs32(sb, get_seconds());
+ if ((flags & UFS_ST_MASK) == UFS_ST_SUN
+ || (flags & UFS_ST_MASK) == UFS_ST_SUNOS
+ || (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
+ ufs_set_fs_state(sb, usb1, usb3,
+ UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
+ ubh_mark_buffer_dirty (USPI_UBH(uspi));
+ sb->s_flags |= MS_RDONLY;
+ } else {
+ /*
+ * fs was mounted as ro, remounting rw
+ */
+#ifndef CONFIG_UFS_FS_WRITE
+ pr_err("ufs was compiled with read-only support, can't be mounted as read-write\n");
+ mutex_unlock(&UFS_SB(sb)->s_lock);
+ unlock_ufs(sb);
+ return -EINVAL;
+#else
+ if (ufstype != UFS_MOUNT_UFSTYPE_SUN &&
+ ufstype != UFS_MOUNT_UFSTYPE_SUNOS &&
+ ufstype != UFS_MOUNT_UFSTYPE_44BSD &&
+ ufstype != UFS_MOUNT_UFSTYPE_SUNx86 &&
+ ufstype != UFS_MOUNT_UFSTYPE_UFS2) {
+ pr_err("this ufstype is read-only supported\n");
+ mutex_unlock(&UFS_SB(sb)->s_lock);
+ unlock_ufs(sb);
+ return -EINVAL;
+ }
+ if (!ufs_read_cylinder_structures(sb)) {
+ pr_err("failed during remounting\n");
+ mutex_unlock(&UFS_SB(sb)->s_lock);
+ unlock_ufs(sb);
+ return -EPERM;
+ }
+ sb->s_flags &= ~MS_RDONLY;
+#endif
+ }
+ UFS_SB(sb)->s_mount_opt = new_mount_opt;
+ mutex_unlock(&UFS_SB(sb)->s_lock);
+ unlock_ufs(sb);
+ return 0;
+}
+
+static int ufs_show_options(struct seq_file *seq, struct dentry *root)
+{
+ struct ufs_sb_info *sbi = UFS_SB(root->d_sb);
+ unsigned mval = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE;
+ const struct match_token *tp = tokens;
+
+ while (tp->token != Opt_onerror_panic && tp->token != mval)
+ ++tp;
+ BUG_ON(tp->token == Opt_onerror_panic);
+ seq_printf(seq, ",%s", tp->pattern);
+
+ mval = sbi->s_mount_opt & UFS_MOUNT_ONERROR;
+ while (tp->token != Opt_err && tp->token != mval)
+ ++tp;
+ BUG_ON(tp->token == Opt_err);
+ seq_printf(seq, ",%s", tp->pattern);
+
+ return 0;
+}
+
+static int ufs_statfs(struct dentry *dentry, struct kstatfs *buf)
+{
+ struct super_block *sb = dentry->d_sb;
+ struct ufs_sb_private_info *uspi= UFS_SB(sb)->s_uspi;
+ unsigned flags = UFS_SB(sb)->s_flags;
+ struct ufs_super_block_third *usb3;
+ u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
+
+ lock_ufs(sb);
+
+ usb3 = ubh_get_usb_third(uspi);
+
+ if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
+ buf->f_type = UFS2_MAGIC;
+ buf->f_blocks = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
+ } else {
+ buf->f_type = UFS_MAGIC;
+ buf->f_blocks = uspi->s_dsize;
+ }
+ buf->f_bfree = ufs_blkstofrags(uspi->cs_total.cs_nbfree) +
+ uspi->cs_total.cs_nffree;
+ buf->f_ffree = uspi->cs_total.cs_nifree;
+ buf->f_bsize = sb->s_blocksize;
+ buf->f_bavail = (buf->f_bfree > (((long)buf->f_blocks / 100) * uspi->s_minfree))
+ ? (buf->f_bfree - (((long)buf->f_blocks / 100) * uspi->s_minfree)) : 0;
+ buf->f_files = uspi->s_ncg * uspi->s_ipg;
+ buf->f_namelen = UFS_MAXNAMLEN;
+ buf->f_fsid.val[0] = (u32)id;
+ buf->f_fsid.val[1] = (u32)(id >> 32);
+
+ unlock_ufs(sb);
+
+ return 0;
+}
+
+static struct kmem_cache * ufs_inode_cachep;
+
+static struct inode *ufs_alloc_inode(struct super_block *sb)
+{
+ struct ufs_inode_info *ei;
+
+ ei = kmem_cache_alloc(ufs_inode_cachep, GFP_NOFS);
+ if (!ei)
+ return NULL;
+
+ ei->vfs_inode.i_version = 1;
+ return &ei->vfs_inode;
+}
+
+static void ufs_i_callback(struct rcu_head *head)
+{
+ struct inode *inode = container_of(head, struct inode, i_rcu);
+ kmem_cache_free(ufs_inode_cachep, UFS_I(inode));
+}
+
+static void ufs_destroy_inode(struct inode *inode)
+{
+ call_rcu(&inode->i_rcu, ufs_i_callback);
+}
+
+static void init_once(void *foo)
+{
+ struct ufs_inode_info *ei = (struct ufs_inode_info *) foo;
+
+ inode_init_once(&ei->vfs_inode);
+}
+
+static int __init init_inodecache(void)
+{
+ ufs_inode_cachep = kmem_cache_create("ufs_inode_cache",
+ sizeof(struct ufs_inode_info),
+ 0, (SLAB_RECLAIM_ACCOUNT|
+ SLAB_MEM_SPREAD),
+ init_once);
+ if (ufs_inode_cachep == NULL)
+ return -ENOMEM;
+ return 0;
+}
+
+static void destroy_inodecache(void)
+{
+ /*
+ * Make sure all delayed rcu free inodes are flushed before we
+ * destroy cache.
+ */
+ rcu_barrier();
+ kmem_cache_destroy(ufs_inode_cachep);
+}
+
+static const struct super_operations ufs_super_ops = {
+ .alloc_inode = ufs_alloc_inode,
+ .destroy_inode = ufs_destroy_inode,
+ .write_inode = ufs_write_inode,
+ .evict_inode = ufs_evict_inode,
+ .put_super = ufs_put_super,
+ .sync_fs = ufs_sync_fs,
+ .statfs = ufs_statfs,
+ .remount_fs = ufs_remount,
+ .show_options = ufs_show_options,
+};
+
+static struct dentry *ufs_mount(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *data)
+{
+ return mount_bdev(fs_type, flags, dev_name, data, ufs_fill_super);
+}
+
+static struct file_system_type ufs_fs_type = {
+ .owner = THIS_MODULE,
+ .name = "ufs",
+ .mount = ufs_mount,
+ .kill_sb = kill_block_super,
+ .fs_flags = FS_REQUIRES_DEV,
+};
+MODULE_ALIAS_FS("ufs");
+
+static int __init init_ufs_fs(void)
+{
+ int err = init_inodecache();
+ if (err)
+ goto out1;
+ err = register_filesystem(&ufs_fs_type);
+ if (err)
+ goto out;
+ return 0;
+out:
+ destroy_inodecache();
+out1:
+ return err;
+}
+
+static void __exit exit_ufs_fs(void)
+{
+ unregister_filesystem(&ufs_fs_type);
+ destroy_inodecache();
+}
+
+module_init(init_ufs_fs)
+module_exit(exit_ufs_fs)
+MODULE_LICENSE("GPL");
diff --git a/fs/ufs/swab.h b/fs/ufs/swab.h
new file mode 100644
index 000000000..8d974c4fd
--- /dev/null
+++ b/fs/ufs/swab.h
@@ -0,0 +1,115 @@
+/*
+ * linux/fs/ufs/swab.h
+ *
+ * Copyright (C) 1997, 1998 Francois-Rene Rideau <fare@tunes.org>
+ * Copyright (C) 1998 Jakub Jelinek <jj@ultra.linux.cz>
+ * Copyright (C) 2001 Christoph Hellwig <hch@infradead.org>
+ */
+
+#ifndef _UFS_SWAB_H
+#define _UFS_SWAB_H
+
+/*
+ * Notes:
+ * HERE WE ASSUME EITHER BIG OR LITTLE ENDIAN UFSes
+ * in case there are ufs implementations that have strange bytesexes,
+ * you'll need to modify code here as well as in ufs_super.c and ufs_fs.h
+ * to support them.
+ */
+
+enum {
+ BYTESEX_LE,
+ BYTESEX_BE
+};
+
+static inline u64
+fs64_to_cpu(struct super_block *sbp, __fs64 n)
+{
+ if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE)
+ return le64_to_cpu((__force __le64)n);
+ else
+ return be64_to_cpu((__force __be64)n);
+}
+
+static inline __fs64
+cpu_to_fs64(struct super_block *sbp, u64 n)
+{
+ if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE)
+ return (__force __fs64)cpu_to_le64(n);
+ else
+ return (__force __fs64)cpu_to_be64(n);
+}
+
+static inline u32
+fs32_to_cpu(struct super_block *sbp, __fs32 n)
+{
+ if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE)
+ return le32_to_cpu((__force __le32)n);
+ else
+ return be32_to_cpu((__force __be32)n);
+}
+
+static inline __fs32
+cpu_to_fs32(struct super_block *sbp, u32 n)
+{
+ if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE)
+ return (__force __fs32)cpu_to_le32(n);
+ else
+ return (__force __fs32)cpu_to_be32(n);
+}
+
+static inline void
+fs32_add(struct super_block *sbp, __fs32 *n, int d)
+{
+ if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE)
+ le32_add_cpu((__le32 *)n, d);
+ else
+ be32_add_cpu((__be32 *)n, d);
+}
+
+static inline void
+fs32_sub(struct super_block *sbp, __fs32 *n, int d)
+{
+ if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE)
+ le32_add_cpu((__le32 *)n, -d);
+ else
+ be32_add_cpu((__be32 *)n, -d);
+}
+
+static inline u16
+fs16_to_cpu(struct super_block *sbp, __fs16 n)
+{
+ if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE)
+ return le16_to_cpu((__force __le16)n);
+ else
+ return be16_to_cpu((__force __be16)n);
+}
+
+static inline __fs16
+cpu_to_fs16(struct super_block *sbp, u16 n)
+{
+ if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE)
+ return (__force __fs16)cpu_to_le16(n);
+ else
+ return (__force __fs16)cpu_to_be16(n);
+}
+
+static inline void
+fs16_add(struct super_block *sbp, __fs16 *n, int d)
+{
+ if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE)
+ le16_add_cpu((__le16 *)n, d);
+ else
+ be16_add_cpu((__be16 *)n, d);
+}
+
+static inline void
+fs16_sub(struct super_block *sbp, __fs16 *n, int d)
+{
+ if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE)
+ le16_add_cpu((__le16 *)n, -d);
+ else
+ be16_add_cpu((__be16 *)n, -d);
+}
+
+#endif /* _UFS_SWAB_H */
diff --git a/fs/ufs/symlink.c b/fs/ufs/symlink.c
new file mode 100644
index 000000000..5b537e2fd
--- /dev/null
+++ b/fs/ufs/symlink.c
@@ -0,0 +1,53 @@
+/*
+ * linux/fs/ufs/symlink.c
+ *
+ * Only fast symlinks left here - the rest is done by generic code. AV, 1999
+ *
+ * Copyright (C) 1998
+ * Daniel Pirkl <daniel.pirkl@emai.cz>
+ * Charles University, Faculty of Mathematics and Physics
+ *
+ * from
+ *
+ * linux/fs/ext2/symlink.c
+ *
+ * Copyright (C) 1992, 1993, 1994, 1995
+ * Remy Card (card@masi.ibp.fr)
+ * Laboratoire MASI - Institut Blaise Pascal
+ * Universite Pierre et Marie Curie (Paris VI)
+ *
+ * from
+ *
+ * linux/fs/minix/symlink.c
+ *
+ * Copyright (C) 1991, 1992 Linus Torvalds
+ *
+ * ext2 symlink handling code
+ */
+
+#include <linux/fs.h>
+#include <linux/namei.h>
+
+#include "ufs_fs.h"
+#include "ufs.h"
+
+
+static void *ufs_follow_link(struct dentry *dentry, struct nameidata *nd)
+{
+ struct ufs_inode_info *p = UFS_I(d_inode(dentry));
+ nd_set_link(nd, (char*)p->i_u1.i_symlink);
+ return NULL;
+}
+
+const struct inode_operations ufs_fast_symlink_inode_operations = {
+ .readlink = generic_readlink,
+ .follow_link = ufs_follow_link,
+ .setattr = ufs_setattr,
+};
+
+const struct inode_operations ufs_symlink_inode_operations = {
+ .readlink = generic_readlink,
+ .follow_link = page_follow_link_light,
+ .put_link = page_put_link,
+ .setattr = ufs_setattr,
+};
diff --git a/fs/ufs/truncate.c b/fs/ufs/truncate.c
new file mode 100644
index 000000000..21154704c
--- /dev/null
+++ b/fs/ufs/truncate.c
@@ -0,0 +1,523 @@
+/*
+ * linux/fs/ufs/truncate.c
+ *
+ * Copyright (C) 1998
+ * Daniel Pirkl <daniel.pirkl@email.cz>
+ * Charles University, Faculty of Mathematics and Physics
+ *
+ * from
+ *
+ * linux/fs/ext2/truncate.c
+ *
+ * Copyright (C) 1992, 1993, 1994, 1995
+ * Remy Card (card@masi.ibp.fr)
+ * Laboratoire MASI - Institut Blaise Pascal
+ * Universite Pierre et Marie Curie (Paris VI)
+ *
+ * from
+ *
+ * linux/fs/minix/truncate.c
+ *
+ * Copyright (C) 1991, 1992 Linus Torvalds
+ *
+ * Big-endian to little-endian byte-swapping/bitmaps by
+ * David S. Miller (davem@caip.rutgers.edu), 1995
+ */
+
+/*
+ * Real random numbers for secure rm added 94/02/18
+ * Idea from Pierre del Perugia <delperug@gla.ecoledoc.ibp.fr>
+ */
+
+/*
+ * Adoptation to use page cache and UFS2 write support by
+ * Evgeniy Dushistov <dushistov@mail.ru>, 2006-2007
+ */
+
+#include <linux/errno.h>
+#include <linux/fs.h>
+#include <linux/fcntl.h>
+#include <linux/time.h>
+#include <linux/stat.h>
+#include <linux/string.h>
+#include <linux/buffer_head.h>
+#include <linux/blkdev.h>
+#include <linux/sched.h>
+
+#include "ufs_fs.h"
+#include "ufs.h"
+#include "swab.h"
+#include "util.h"
+
+/*
+ * Secure deletion currently doesn't work. It interacts very badly
+ * with buffers shared with memory mappings, and for that reason
+ * can't be done in the truncate() routines. It should instead be
+ * done separately in "release()" before calling the truncate routines
+ * that will release the actual file blocks.
+ *
+ * Linus
+ */
+
+#define DIRECT_BLOCK ((inode->i_size + uspi->s_bsize - 1) >> uspi->s_bshift)
+#define DIRECT_FRAGMENT ((inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift)
+
+
+static int ufs_trunc_direct(struct inode *inode)
+{
+ struct ufs_inode_info *ufsi = UFS_I(inode);
+ struct super_block * sb;
+ struct ufs_sb_private_info * uspi;
+ void *p;
+ u64 frag1, frag2, frag3, frag4, block1, block2;
+ unsigned frag_to_free, free_count;
+ unsigned i, tmp;
+ int retry;
+
+ UFSD("ENTER: ino %lu\n", inode->i_ino);
+
+ sb = inode->i_sb;
+ uspi = UFS_SB(sb)->s_uspi;
+
+ frag_to_free = 0;
+ free_count = 0;
+ retry = 0;
+
+ frag1 = DIRECT_FRAGMENT;
+ frag4 = min_t(u64, UFS_NDIR_FRAGMENT, ufsi->i_lastfrag);
+ frag2 = ((frag1 & uspi->s_fpbmask) ? ((frag1 | uspi->s_fpbmask) + 1) : frag1);
+ frag3 = frag4 & ~uspi->s_fpbmask;
+ block1 = block2 = 0;
+ if (frag2 > frag3) {
+ frag2 = frag4;
+ frag3 = frag4 = 0;
+ } else if (frag2 < frag3) {
+ block1 = ufs_fragstoblks (frag2);
+ block2 = ufs_fragstoblks (frag3);
+ }
+
+ UFSD("ino %lu, frag1 %llu, frag2 %llu, block1 %llu, block2 %llu,"
+ " frag3 %llu, frag4 %llu\n", inode->i_ino,
+ (unsigned long long)frag1, (unsigned long long)frag2,
+ (unsigned long long)block1, (unsigned long long)block2,
+ (unsigned long long)frag3, (unsigned long long)frag4);
+
+ if (frag1 >= frag2)
+ goto next1;
+
+ /*
+ * Free first free fragments
+ */
+ p = ufs_get_direct_data_ptr(uspi, ufsi, ufs_fragstoblks(frag1));
+ tmp = ufs_data_ptr_to_cpu(sb, p);
+ if (!tmp )
+ ufs_panic (sb, "ufs_trunc_direct", "internal error");
+ frag2 -= frag1;
+ frag1 = ufs_fragnum (frag1);
+
+ ufs_free_fragments(inode, tmp + frag1, frag2);
+ mark_inode_dirty(inode);
+ frag_to_free = tmp + frag1;
+
+next1:
+ /*
+ * Free whole blocks
+ */
+ for (i = block1 ; i < block2; i++) {
+ p = ufs_get_direct_data_ptr(uspi, ufsi, i);
+ tmp = ufs_data_ptr_to_cpu(sb, p);
+ if (!tmp)
+ continue;
+ ufs_data_ptr_clear(uspi, p);
+
+ if (free_count == 0) {
+ frag_to_free = tmp;
+ free_count = uspi->s_fpb;
+ } else if (free_count > 0 && frag_to_free == tmp - free_count)
+ free_count += uspi->s_fpb;
+ else {
+ ufs_free_blocks (inode, frag_to_free, free_count);
+ frag_to_free = tmp;
+ free_count = uspi->s_fpb;
+ }
+ mark_inode_dirty(inode);
+ }
+
+ if (free_count > 0)
+ ufs_free_blocks (inode, frag_to_free, free_count);
+
+ if (frag3 >= frag4)
+ goto next3;
+
+ /*
+ * Free last free fragments
+ */
+ p = ufs_get_direct_data_ptr(uspi, ufsi, ufs_fragstoblks(frag3));
+ tmp = ufs_data_ptr_to_cpu(sb, p);
+ if (!tmp )
+ ufs_panic(sb, "ufs_truncate_direct", "internal error");
+ frag4 = ufs_fragnum (frag4);
+ ufs_data_ptr_clear(uspi, p);
+
+ ufs_free_fragments (inode, tmp, frag4);
+ mark_inode_dirty(inode);
+ next3:
+
+ UFSD("EXIT: ino %lu\n", inode->i_ino);
+ return retry;
+}
+
+
+static int ufs_trunc_indirect(struct inode *inode, u64 offset, void *p)
+{
+ struct super_block * sb;
+ struct ufs_sb_private_info * uspi;
+ struct ufs_buffer_head * ind_ubh;
+ void *ind;
+ u64 tmp, indirect_block, i, frag_to_free;
+ unsigned free_count;
+ int retry;
+
+ UFSD("ENTER: ino %lu, offset %llu, p: %p\n",
+ inode->i_ino, (unsigned long long)offset, p);
+
+ BUG_ON(!p);
+
+ sb = inode->i_sb;
+ uspi = UFS_SB(sb)->s_uspi;
+
+ frag_to_free = 0;
+ free_count = 0;
+ retry = 0;
+
+ tmp = ufs_data_ptr_to_cpu(sb, p);
+ if (!tmp)
+ return 0;
+ ind_ubh = ubh_bread(sb, tmp, uspi->s_bsize);
+ if (tmp != ufs_data_ptr_to_cpu(sb, p)) {
+ ubh_brelse (ind_ubh);
+ return 1;
+ }
+ if (!ind_ubh) {
+ ufs_data_ptr_clear(uspi, p);
+ return 0;
+ }
+
+ indirect_block = (DIRECT_BLOCK > offset) ? (DIRECT_BLOCK - offset) : 0;
+ for (i = indirect_block; i < uspi->s_apb; i++) {
+ ind = ubh_get_data_ptr(uspi, ind_ubh, i);
+ tmp = ufs_data_ptr_to_cpu(sb, ind);
+ if (!tmp)
+ continue;
+
+ ufs_data_ptr_clear(uspi, ind);
+ ubh_mark_buffer_dirty(ind_ubh);
+ if (free_count == 0) {
+ frag_to_free = tmp;
+ free_count = uspi->s_fpb;
+ } else if (free_count > 0 && frag_to_free == tmp - free_count)
+ free_count += uspi->s_fpb;
+ else {
+ ufs_free_blocks (inode, frag_to_free, free_count);
+ frag_to_free = tmp;
+ free_count = uspi->s_fpb;
+ }
+
+ mark_inode_dirty(inode);
+ }
+
+ if (free_count > 0) {
+ ufs_free_blocks (inode, frag_to_free, free_count);
+ }
+ for (i = 0; i < uspi->s_apb; i++)
+ if (!ufs_is_data_ptr_zero(uspi,
+ ubh_get_data_ptr(uspi, ind_ubh, i)))
+ break;
+ if (i >= uspi->s_apb) {
+ tmp = ufs_data_ptr_to_cpu(sb, p);
+ ufs_data_ptr_clear(uspi, p);
+
+ ufs_free_blocks (inode, tmp, uspi->s_fpb);
+ mark_inode_dirty(inode);
+ ubh_bforget(ind_ubh);
+ ind_ubh = NULL;
+ }
+ if (IS_SYNC(inode) && ind_ubh && ubh_buffer_dirty(ind_ubh))
+ ubh_sync_block(ind_ubh);
+ ubh_brelse (ind_ubh);
+
+ UFSD("EXIT: ino %lu\n", inode->i_ino);
+
+ return retry;
+}
+
+static int ufs_trunc_dindirect(struct inode *inode, u64 offset, void *p)
+{
+ struct super_block * sb;
+ struct ufs_sb_private_info * uspi;
+ struct ufs_buffer_head *dind_bh;
+ u64 i, tmp, dindirect_block;
+ void *dind;
+ int retry = 0;
+
+ UFSD("ENTER: ino %lu\n", inode->i_ino);
+
+ sb = inode->i_sb;
+ uspi = UFS_SB(sb)->s_uspi;
+
+ dindirect_block = (DIRECT_BLOCK > offset)
+ ? ((DIRECT_BLOCK - offset) >> uspi->s_apbshift) : 0;
+ retry = 0;
+
+ tmp = ufs_data_ptr_to_cpu(sb, p);
+ if (!tmp)
+ return 0;
+ dind_bh = ubh_bread(sb, tmp, uspi->s_bsize);
+ if (tmp != ufs_data_ptr_to_cpu(sb, p)) {
+ ubh_brelse (dind_bh);
+ return 1;
+ }
+ if (!dind_bh) {
+ ufs_data_ptr_clear(uspi, p);
+ return 0;
+ }
+
+ for (i = dindirect_block ; i < uspi->s_apb ; i++) {
+ dind = ubh_get_data_ptr(uspi, dind_bh, i);
+ tmp = ufs_data_ptr_to_cpu(sb, dind);
+ if (!tmp)
+ continue;
+ retry |= ufs_trunc_indirect (inode, offset + (i << uspi->s_apbshift), dind);
+ ubh_mark_buffer_dirty(dind_bh);
+ }
+
+ for (i = 0; i < uspi->s_apb; i++)
+ if (!ufs_is_data_ptr_zero(uspi,
+ ubh_get_data_ptr(uspi, dind_bh, i)))
+ break;
+ if (i >= uspi->s_apb) {
+ tmp = ufs_data_ptr_to_cpu(sb, p);
+ ufs_data_ptr_clear(uspi, p);
+
+ ufs_free_blocks(inode, tmp, uspi->s_fpb);
+ mark_inode_dirty(inode);
+ ubh_bforget(dind_bh);
+ dind_bh = NULL;
+ }
+ if (IS_SYNC(inode) && dind_bh && ubh_buffer_dirty(dind_bh))
+ ubh_sync_block(dind_bh);
+ ubh_brelse (dind_bh);
+
+ UFSD("EXIT: ino %lu\n", inode->i_ino);
+
+ return retry;
+}
+
+static int ufs_trunc_tindirect(struct inode *inode)
+{
+ struct super_block *sb = inode->i_sb;
+ struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
+ struct ufs_inode_info *ufsi = UFS_I(inode);
+ struct ufs_buffer_head * tind_bh;
+ u64 tindirect_block, tmp, i;
+ void *tind, *p;
+ int retry;
+
+ UFSD("ENTER: ino %lu\n", inode->i_ino);
+
+ retry = 0;
+
+ tindirect_block = (DIRECT_BLOCK > (UFS_NDADDR + uspi->s_apb + uspi->s_2apb))
+ ? ((DIRECT_BLOCK - UFS_NDADDR - uspi->s_apb - uspi->s_2apb) >> uspi->s_2apbshift) : 0;
+
+ p = ufs_get_direct_data_ptr(uspi, ufsi, UFS_TIND_BLOCK);
+ if (!(tmp = ufs_data_ptr_to_cpu(sb, p)))
+ return 0;
+ tind_bh = ubh_bread (sb, tmp, uspi->s_bsize);
+ if (tmp != ufs_data_ptr_to_cpu(sb, p)) {
+ ubh_brelse (tind_bh);
+ return 1;
+ }
+ if (!tind_bh) {
+ ufs_data_ptr_clear(uspi, p);
+ return 0;
+ }
+
+ for (i = tindirect_block ; i < uspi->s_apb ; i++) {
+ tind = ubh_get_data_ptr(uspi, tind_bh, i);
+ retry |= ufs_trunc_dindirect(inode, UFS_NDADDR +
+ uspi->s_apb + ((i + 1) << uspi->s_2apbshift), tind);
+ ubh_mark_buffer_dirty(tind_bh);
+ }
+ for (i = 0; i < uspi->s_apb; i++)
+ if (!ufs_is_data_ptr_zero(uspi,
+ ubh_get_data_ptr(uspi, tind_bh, i)))
+ break;
+ if (i >= uspi->s_apb) {
+ tmp = ufs_data_ptr_to_cpu(sb, p);
+ ufs_data_ptr_clear(uspi, p);
+
+ ufs_free_blocks(inode, tmp, uspi->s_fpb);
+ mark_inode_dirty(inode);
+ ubh_bforget(tind_bh);
+ tind_bh = NULL;
+ }
+ if (IS_SYNC(inode) && tind_bh && ubh_buffer_dirty(tind_bh))
+ ubh_sync_block(tind_bh);
+ ubh_brelse (tind_bh);
+
+ UFSD("EXIT: ino %lu\n", inode->i_ino);
+ return retry;
+}
+
+static int ufs_alloc_lastblock(struct inode *inode)
+{
+ int err = 0;
+ struct super_block *sb = inode->i_sb;
+ struct address_space *mapping = inode->i_mapping;
+ struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
+ unsigned i, end;
+ sector_t lastfrag;
+ struct page *lastpage;
+ struct buffer_head *bh;
+ u64 phys64;
+
+ lastfrag = (i_size_read(inode) + uspi->s_fsize - 1) >> uspi->s_fshift;
+
+ if (!lastfrag)
+ goto out;
+
+ lastfrag--;
+
+ lastpage = ufs_get_locked_page(mapping, lastfrag >>
+ (PAGE_CACHE_SHIFT - inode->i_blkbits));
+ if (IS_ERR(lastpage)) {
+ err = -EIO;
+ goto out;
+ }
+
+ end = lastfrag & ((1 << (PAGE_CACHE_SHIFT - inode->i_blkbits)) - 1);
+ bh = page_buffers(lastpage);
+ for (i = 0; i < end; ++i)
+ bh = bh->b_this_page;
+
+
+ err = ufs_getfrag_block(inode, lastfrag, bh, 1);
+
+ if (unlikely(err))
+ goto out_unlock;
+
+ if (buffer_new(bh)) {
+ clear_buffer_new(bh);
+ unmap_underlying_metadata(bh->b_bdev,
+ bh->b_blocknr);
+ /*
+ * we do not zeroize fragment, because of
+ * if it maped to hole, it already contains zeroes
+ */
+ set_buffer_uptodate(bh);
+ mark_buffer_dirty(bh);
+ set_page_dirty(lastpage);
+ }
+
+ if (lastfrag >= UFS_IND_FRAGMENT) {
+ end = uspi->s_fpb - ufs_fragnum(lastfrag) - 1;
+ phys64 = bh->b_blocknr + 1;
+ for (i = 0; i < end; ++i) {
+ bh = sb_getblk(sb, i + phys64);
+ lock_buffer(bh);
+ memset(bh->b_data, 0, sb->s_blocksize);
+ set_buffer_uptodate(bh);
+ mark_buffer_dirty(bh);
+ unlock_buffer(bh);
+ sync_dirty_buffer(bh);
+ brelse(bh);
+ }
+ }
+out_unlock:
+ ufs_put_locked_page(lastpage);
+out:
+ return err;
+}
+
+int ufs_truncate(struct inode *inode, loff_t old_i_size)
+{
+ struct ufs_inode_info *ufsi = UFS_I(inode);
+ struct super_block *sb = inode->i_sb;
+ struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
+ int retry, err = 0;
+
+ UFSD("ENTER: ino %lu, i_size: %llu, old_i_size: %llu\n",
+ inode->i_ino, (unsigned long long)i_size_read(inode),
+ (unsigned long long)old_i_size);
+
+ if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
+ S_ISLNK(inode->i_mode)))
+ return -EINVAL;
+ if (IS_APPEND(inode) || IS_IMMUTABLE(inode))
+ return -EPERM;
+
+ err = ufs_alloc_lastblock(inode);
+
+ if (err) {
+ i_size_write(inode, old_i_size);
+ goto out;
+ }
+
+ block_truncate_page(inode->i_mapping, inode->i_size, ufs_getfrag_block);
+
+ while (1) {
+ retry = ufs_trunc_direct(inode);
+ retry |= ufs_trunc_indirect(inode, UFS_IND_BLOCK,
+ ufs_get_direct_data_ptr(uspi, ufsi,
+ UFS_IND_BLOCK));
+ retry |= ufs_trunc_dindirect(inode, UFS_IND_BLOCK + uspi->s_apb,
+ ufs_get_direct_data_ptr(uspi, ufsi,
+ UFS_DIND_BLOCK));
+ retry |= ufs_trunc_tindirect (inode);
+ if (!retry)
+ break;
+ if (IS_SYNC(inode) && (inode->i_state & I_DIRTY))
+ ufs_sync_inode (inode);
+ yield();
+ }
+
+ inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC;
+ ufsi->i_lastfrag = DIRECT_FRAGMENT;
+ mark_inode_dirty(inode);
+out:
+ UFSD("EXIT: err %d\n", err);
+ return err;
+}
+
+int ufs_setattr(struct dentry *dentry, struct iattr *attr)
+{
+ struct inode *inode = d_inode(dentry);
+ unsigned int ia_valid = attr->ia_valid;
+ int error;
+
+ error = inode_change_ok(inode, attr);
+ if (error)
+ return error;
+
+ if (ia_valid & ATTR_SIZE && attr->ia_size != inode->i_size) {
+ loff_t old_i_size = inode->i_size;
+
+ /* XXX(truncate): truncate_setsize should be called last */
+ truncate_setsize(inode, attr->ia_size);
+
+ lock_ufs(inode->i_sb);
+ error = ufs_truncate(inode, old_i_size);
+ unlock_ufs(inode->i_sb);
+ if (error)
+ return error;
+ }
+
+ setattr_copy(inode, attr);
+ mark_inode_dirty(inode);
+ return 0;
+}
+
+const struct inode_operations ufs_file_inode_operations = {
+ .setattr = ufs_setattr,
+};
diff --git a/fs/ufs/ufs.h b/fs/ufs/ufs.h
new file mode 100644
index 000000000..cf6368d42
--- /dev/null
+++ b/fs/ufs/ufs.h
@@ -0,0 +1,176 @@
+#ifndef _UFS_UFS_H
+#define _UFS_UFS_H 1
+
+#ifdef pr_fmt
+#undef pr_fmt
+#endif
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#define UFS_MAX_GROUP_LOADED 8
+#define UFS_CGNO_EMPTY ((unsigned)-1)
+
+struct ufs_sb_private_info;
+struct ufs_cg_private_info;
+struct ufs_csum;
+
+struct ufs_sb_info {
+ struct ufs_sb_private_info * s_uspi;
+ struct ufs_csum * s_csp;
+ unsigned s_bytesex;
+ unsigned s_flags;
+ struct buffer_head ** s_ucg;
+ struct ufs_cg_private_info * s_ucpi[UFS_MAX_GROUP_LOADED];
+ unsigned s_cgno[UFS_MAX_GROUP_LOADED];
+ unsigned short s_cg_loaded;
+ unsigned s_mount_opt;
+ struct mutex mutex;
+ struct task_struct *mutex_owner;
+ struct super_block *sb;
+ int work_queued; /* non-zero if the delayed work is queued */
+ struct delayed_work sync_work; /* FS sync delayed work */
+ spinlock_t work_lock; /* protects sync_work and work_queued */
+ struct mutex s_lock;
+};
+
+struct ufs_inode_info {
+ union {
+ __fs32 i_data[15];
+ __u8 i_symlink[2 * 4 * 15];
+ __fs64 u2_i_data[15];
+ } i_u1;
+ __u32 i_flags;
+ __u32 i_shadow;
+ __u32 i_unused1;
+ __u32 i_unused2;
+ __u32 i_oeftflag;
+ __u16 i_osync;
+ __u64 i_lastfrag;
+ __u32 i_dir_start_lookup;
+ struct inode vfs_inode;
+};
+
+/* mount options */
+#define UFS_MOUNT_ONERROR 0x0000000F
+#define UFS_MOUNT_ONERROR_PANIC 0x00000001
+#define UFS_MOUNT_ONERROR_LOCK 0x00000002
+#define UFS_MOUNT_ONERROR_UMOUNT 0x00000004
+#define UFS_MOUNT_ONERROR_REPAIR 0x00000008
+
+#define UFS_MOUNT_UFSTYPE 0x0000FFF0
+#define UFS_MOUNT_UFSTYPE_OLD 0x00000010
+#define UFS_MOUNT_UFSTYPE_44BSD 0x00000020
+#define UFS_MOUNT_UFSTYPE_SUN 0x00000040
+#define UFS_MOUNT_UFSTYPE_NEXTSTEP 0x00000080
+#define UFS_MOUNT_UFSTYPE_NEXTSTEP_CD 0x00000100
+#define UFS_MOUNT_UFSTYPE_OPENSTEP 0x00000200
+#define UFS_MOUNT_UFSTYPE_SUNx86 0x00000400
+#define UFS_MOUNT_UFSTYPE_HP 0x00000800
+#define UFS_MOUNT_UFSTYPE_UFS2 0x00001000
+#define UFS_MOUNT_UFSTYPE_SUNOS 0x00002000
+
+#define ufs_clear_opt(o,opt) o &= ~UFS_MOUNT_##opt
+#define ufs_set_opt(o,opt) o |= UFS_MOUNT_##opt
+#define ufs_test_opt(o,opt) ((o) & UFS_MOUNT_##opt)
+
+/*
+ * Debug code
+ */
+#ifdef CONFIG_UFS_DEBUG
+# define UFSD(f, a...) { \
+ pr_debug("UFSD (%s, %d): %s:", \
+ __FILE__, __LINE__, __func__); \
+ pr_debug(f, ## a); \
+ }
+#else
+# define UFSD(f, a...) /**/
+#endif
+
+/* balloc.c */
+extern void ufs_free_fragments (struct inode *, u64, unsigned);
+extern void ufs_free_blocks (struct inode *, u64, unsigned);
+extern u64 ufs_new_fragments(struct inode *, void *, u64, u64,
+ unsigned, int *, struct page *);
+
+/* cylinder.c */
+extern struct ufs_cg_private_info * ufs_load_cylinder (struct super_block *, unsigned);
+extern void ufs_put_cylinder (struct super_block *, unsigned);
+
+/* dir.c */
+extern const struct inode_operations ufs_dir_inode_operations;
+extern int ufs_add_link (struct dentry *, struct inode *);
+extern ino_t ufs_inode_by_name(struct inode *, const struct qstr *);
+extern int ufs_make_empty(struct inode *, struct inode *);
+extern struct ufs_dir_entry *ufs_find_entry(struct inode *, const struct qstr *, struct page **);
+extern int ufs_delete_entry(struct inode *, struct ufs_dir_entry *, struct page *);
+extern int ufs_empty_dir (struct inode *);
+extern struct ufs_dir_entry *ufs_dotdot(struct inode *, struct page **);
+extern void ufs_set_link(struct inode *dir, struct ufs_dir_entry *de,
+ struct page *page, struct inode *inode);
+
+/* file.c */
+extern const struct inode_operations ufs_file_inode_operations;
+extern const struct file_operations ufs_file_operations;
+extern const struct address_space_operations ufs_aops;
+
+/* ialloc.c */
+extern void ufs_free_inode (struct inode *inode);
+extern struct inode * ufs_new_inode (struct inode *, umode_t);
+
+/* inode.c */
+extern struct inode *ufs_iget(struct super_block *, unsigned long);
+extern int ufs_write_inode (struct inode *, struct writeback_control *);
+extern int ufs_sync_inode (struct inode *);
+extern void ufs_evict_inode (struct inode *);
+extern int ufs_getfrag_block (struct inode *inode, sector_t fragment, struct buffer_head *bh_result, int create);
+
+/* namei.c */
+extern const struct file_operations ufs_dir_operations;
+
+/* super.c */
+extern __printf(3, 4)
+void ufs_warning(struct super_block *, const char *, const char *, ...);
+extern __printf(3, 4)
+void ufs_error(struct super_block *, const char *, const char *, ...);
+extern __printf(3, 4)
+void ufs_panic(struct super_block *, const char *, const char *, ...);
+void ufs_mark_sb_dirty(struct super_block *sb);
+
+/* symlink.c */
+extern const struct inode_operations ufs_fast_symlink_inode_operations;
+extern const struct inode_operations ufs_symlink_inode_operations;
+
+/* truncate.c */
+extern int ufs_truncate (struct inode *, loff_t);
+extern int ufs_setattr(struct dentry *dentry, struct iattr *attr);
+
+static inline struct ufs_sb_info *UFS_SB(struct super_block *sb)
+{
+ return sb->s_fs_info;
+}
+
+static inline struct ufs_inode_info *UFS_I(struct inode *inode)
+{
+ return container_of(inode, struct ufs_inode_info, vfs_inode);
+}
+
+/*
+ * Give cylinder group number for a file system block.
+ * Give cylinder group block number for a file system block.
+ */
+/* #define ufs_dtog(d) ((d) / uspi->s_fpg) */
+static inline u64 ufs_dtog(struct ufs_sb_private_info * uspi, u64 b)
+{
+ do_div(b, uspi->s_fpg);
+ return b;
+}
+/* #define ufs_dtogd(d) ((d) % uspi->s_fpg) */
+static inline u32 ufs_dtogd(struct ufs_sb_private_info * uspi, u64 b)
+{
+ return do_div(b, uspi->s_fpg);
+}
+
+extern void lock_ufs(struct super_block *sb);
+extern void unlock_ufs(struct super_block *sb);
+
+#endif /* _UFS_UFS_H */
diff --git a/fs/ufs/ufs_fs.h b/fs/ufs/ufs_fs.h
new file mode 100644
index 000000000..0cbd5d340
--- /dev/null
+++ b/fs/ufs/ufs_fs.h
@@ -0,0 +1,960 @@
+/*
+ * linux/include/linux/ufs_fs.h
+ *
+ * Copyright (C) 1996
+ * Adrian Rodriguez (adrian@franklins-tower.rutgers.edu)
+ * Laboratory for Computer Science Research Computing Facility
+ * Rutgers, The State University of New Jersey
+ *
+ * Clean swab support by Fare <fare@tunes.org>
+ * just hope no one is using NNUUXXI on __?64 structure elements
+ * 64-bit clean thanks to Maciej W. Rozycki <macro@ds2.pg.gda.pl>
+ *
+ * 4.4BSD (FreeBSD) support added on February 1st 1998 by
+ * Niels Kristian Bech Jensen <nkbj@image.dk> partially based
+ * on code by Martin von Loewis <martin@mira.isdn.cs.tu-berlin.de>.
+ *
+ * NeXTstep support added on February 5th 1998 by
+ * Niels Kristian Bech Jensen <nkbj@image.dk>.
+ *
+ * Write support by Daniel Pirkl <daniel.pirkl@email.cz>
+ *
+ * HP/UX hfs filesystem support added by
+ * Martin K. Petersen <mkp@mkp.net>, August 1999
+ *
+ * UFS2 (of FreeBSD 5.x) support added by
+ * Niraj Kumar <niraj17@iitbombay.org> , Jan 2004
+ *
+ */
+
+#ifndef __LINUX_UFS_FS_H
+#define __LINUX_UFS_FS_H
+
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/stat.h>
+#include <linux/fs.h>
+#include <linux/workqueue.h>
+
+#include <asm/div64.h>
+typedef __u64 __bitwise __fs64;
+typedef __u32 __bitwise __fs32;
+typedef __u16 __bitwise __fs16;
+
+#define UFS_BBLOCK 0
+#define UFS_BBSIZE 8192
+#define UFS_SBLOCK 8192
+#define UFS_SBSIZE 8192
+
+#define UFS_SECTOR_SIZE 512
+#define UFS_SECTOR_BITS 9
+#define UFS_MAGIC 0x00011954
+#define UFS_MAGIC_BW 0x0f242697
+#define UFS2_MAGIC 0x19540119
+#define UFS_CIGAM 0x54190100 /* byteswapped MAGIC */
+
+/* Copied from FreeBSD */
+/*
+ * Each disk drive contains some number of filesystems.
+ * A filesystem consists of a number of cylinder groups.
+ * Each cylinder group has inodes and data.
+ *
+ * A filesystem is described by its super-block, which in turn
+ * describes the cylinder groups. The super-block is critical
+ * data and is replicated in each cylinder group to protect against
+ * catastrophic loss. This is done at `newfs' time and the critical
+ * super-block data does not change, so the copies need not be
+ * referenced further unless disaster strikes.
+ *
+ * For filesystem fs, the offsets of the various blocks of interest
+ * are given in the super block as:
+ * [fs->fs_sblkno] Super-block
+ * [fs->fs_cblkno] Cylinder group block
+ * [fs->fs_iblkno] Inode blocks
+ * [fs->fs_dblkno] Data blocks
+ * The beginning of cylinder group cg in fs, is given by
+ * the ``cgbase(fs, cg)'' macro.
+ *
+ * Depending on the architecture and the media, the superblock may
+ * reside in any one of four places. For tiny media where every block
+ * counts, it is placed at the very front of the partition. Historically,
+ * UFS1 placed it 8K from the front to leave room for the disk label and
+ * a small bootstrap. For UFS2 it got moved to 64K from the front to leave
+ * room for the disk label and a bigger bootstrap, and for really piggy
+ * systems we check at 256K from the front if the first three fail. In
+ * all cases the size of the superblock will be SBLOCKSIZE. All values are
+ * given in byte-offset form, so they do not imply a sector size. The
+ * SBLOCKSEARCH specifies the order in which the locations should be searched.
+ */
+#define SBLOCK_FLOPPY 0
+#define SBLOCK_UFS1 8192
+#define SBLOCK_UFS2 65536
+#define SBLOCK_PIGGY 262144
+#define SBLOCKSIZE 8192
+#define SBLOCKSEARCH \
+ { SBLOCK_UFS2, SBLOCK_UFS1, SBLOCK_FLOPPY, SBLOCK_PIGGY, -1 }
+
+
+/* HP specific MAGIC values */
+
+#define UFS_MAGIC_LFN 0x00095014 /* fs supports filenames > 14 chars */
+#define UFS_CIGAM_LFN 0x14500900 /* srahc 41 < semanelif stroppus sf */
+
+#define UFS_MAGIC_SEC 0x00612195 /* B1 security fs */
+#define UFS_CIGAM_SEC 0x95216100
+
+#define UFS_MAGIC_FEA 0x00195612 /* fs_featurebits supported */
+#define UFS_CIGAM_FEA 0x12561900
+
+#define UFS_MAGIC_4GB 0x05231994 /* fs > 4 GB && fs_featurebits */
+#define UFS_CIGAM_4GB 0x94192305
+
+/* Seems somebody at HP goofed here. B1 and lfs are both 0x2 !?! */
+#define UFS_FSF_LFN 0x00000001 /* long file names */
+#define UFS_FSF_B1 0x00000002 /* B1 security */
+#define UFS_FSF_LFS 0x00000002 /* large files */
+#define UFS_FSF_LUID 0x00000004 /* large UIDs */
+
+/* End of HP stuff */
+
+
+#define UFS_BSIZE 8192
+#define UFS_MINBSIZE 4096
+#define UFS_FSIZE 1024
+#define UFS_MAXFRAG (UFS_BSIZE / UFS_FSIZE)
+
+#define UFS_NDADDR 12
+#define UFS_NINDIR 3
+
+#define UFS_IND_BLOCK (UFS_NDADDR + 0)
+#define UFS_DIND_BLOCK (UFS_NDADDR + 1)
+#define UFS_TIND_BLOCK (UFS_NDADDR + 2)
+
+#define UFS_NDIR_FRAGMENT (UFS_NDADDR << uspi->s_fpbshift)
+#define UFS_IND_FRAGMENT (UFS_IND_BLOCK << uspi->s_fpbshift)
+#define UFS_DIND_FRAGMENT (UFS_DIND_BLOCK << uspi->s_fpbshift)
+#define UFS_TIND_FRAGMENT (UFS_TIND_BLOCK << uspi->s_fpbshift)
+
+#define UFS_ROOTINO 2
+#define UFS_FIRST_INO (UFS_ROOTINO + 1)
+
+#define UFS_USEEFT ((__u16)65535)
+
+/* fs_clean values */
+#define UFS_FSOK 0x7c269d38
+#define UFS_FSACTIVE ((__s8)0x00)
+#define UFS_FSCLEAN ((__s8)0x01)
+#define UFS_FSSTABLE ((__s8)0x02)
+#define UFS_FSOSF1 ((__s8)0x03) /* is this correct for DEC OSF/1? */
+#define UFS_FSBAD ((__s8)0xff)
+
+/* Solaris-specific fs_clean values */
+#define UFS_FSSUSPEND ((__s8)0xfe) /* temporarily suspended */
+#define UFS_FSLOG ((__s8)0xfd) /* logging fs */
+#define UFS_FSFIX ((__s8)0xfc) /* being repaired while mounted */
+
+/* From here to next blank line, s_flags for ufs_sb_info */
+/* directory entry encoding */
+#define UFS_DE_MASK 0x00000010 /* mask for the following */
+#define UFS_DE_OLD 0x00000000
+#define UFS_DE_44BSD 0x00000010
+/* uid encoding */
+#define UFS_UID_MASK 0x00000060 /* mask for the following */
+#define UFS_UID_OLD 0x00000000
+#define UFS_UID_44BSD 0x00000020
+#define UFS_UID_EFT 0x00000040
+/* superblock state encoding */
+#define UFS_ST_MASK 0x00000700 /* mask for the following */
+#define UFS_ST_OLD 0x00000000
+#define UFS_ST_44BSD 0x00000100
+#define UFS_ST_SUN 0x00000200 /* Solaris */
+#define UFS_ST_SUNOS 0x00000300
+#define UFS_ST_SUNx86 0x00000400 /* Solaris x86 */
+/*cylinder group encoding */
+#define UFS_CG_MASK 0x00003000 /* mask for the following */
+#define UFS_CG_OLD 0x00000000
+#define UFS_CG_44BSD 0x00002000
+#define UFS_CG_SUN 0x00001000
+/* filesystem type encoding */
+#define UFS_TYPE_MASK 0x00010000 /* mask for the following */
+#define UFS_TYPE_UFS1 0x00000000
+#define UFS_TYPE_UFS2 0x00010000
+
+
+/* fs_inodefmt options */
+#define UFS_42INODEFMT -1
+#define UFS_44INODEFMT 2
+
+/*
+ * MINFREE gives the minimum acceptable percentage of file system
+ * blocks which may be free. If the freelist drops below this level
+ * only the superuser may continue to allocate blocks. This may
+ * be set to 0 if no reserve of free blocks is deemed necessary,
+ * however throughput drops by fifty percent if the file system
+ * is run at between 95% and 100% full; thus the minimum default
+ * value of fs_minfree is 5%. However, to get good clustering
+ * performance, 10% is a better choice. hence we use 10% as our
+ * default value. With 10% free space, fragmentation is not a
+ * problem, so we choose to optimize for time.
+ */
+#define UFS_MINFREE 5
+#define UFS_DEFAULTOPT UFS_OPTTIME
+
+/*
+ * Turn file system block numbers into disk block addresses.
+ * This maps file system blocks to device size blocks.
+ */
+#define ufs_fsbtodb(uspi, b) ((b) << (uspi)->s_fsbtodb)
+#define ufs_dbtofsb(uspi, b) ((b) >> (uspi)->s_fsbtodb)
+
+/*
+ * Cylinder group macros to locate things in cylinder groups.
+ * They calc file system addresses of cylinder group data structures.
+ */
+#define ufs_cgbase(c) (uspi->s_fpg * (c))
+#define ufs_cgstart(c) ((uspi)->fs_magic == UFS2_MAGIC ? ufs_cgbase(c) : \
+ (ufs_cgbase(c) + uspi->s_cgoffset * ((c) & ~uspi->s_cgmask)))
+#define ufs_cgsblock(c) (ufs_cgstart(c) + uspi->s_sblkno) /* super blk */
+#define ufs_cgcmin(c) (ufs_cgstart(c) + uspi->s_cblkno) /* cg block */
+#define ufs_cgimin(c) (ufs_cgstart(c) + uspi->s_iblkno) /* inode blk */
+#define ufs_cgdmin(c) (ufs_cgstart(c) + uspi->s_dblkno) /* 1st data */
+
+/*
+ * Macros for handling inode numbers:
+ * inode number to file system block offset.
+ * inode number to cylinder group number.
+ * inode number to file system block address.
+ */
+#define ufs_inotocg(x) ((x) / uspi->s_ipg)
+#define ufs_inotocgoff(x) ((x) % uspi->s_ipg)
+#define ufs_inotofsba(x) (((u64)ufs_cgimin(ufs_inotocg(x))) + ufs_inotocgoff(x) / uspi->s_inopf)
+#define ufs_inotofsbo(x) ((x) % uspi->s_inopf)
+
+/*
+ * Compute the cylinder and rotational position of a cyl block addr.
+ */
+#define ufs_cbtocylno(bno) \
+ ((bno) * uspi->s_nspf / uspi->s_spc)
+#define ufs_cbtorpos(bno) \
+ ((UFS_SB(sb)->s_flags & UFS_CG_SUN) ? \
+ (((((bno) * uspi->s_nspf % uspi->s_spc) % \
+ uspi->s_nsect) * \
+ uspi->s_nrpos) / uspi->s_nsect) \
+ : \
+ ((((bno) * uspi->s_nspf % uspi->s_spc / uspi->s_nsect \
+ * uspi->s_trackskew + (bno) * uspi->s_nspf % uspi->s_spc \
+ % uspi->s_nsect * uspi->s_interleave) % uspi->s_nsect \
+ * uspi->s_nrpos) / uspi->s_npsect))
+
+/*
+ * The following macros optimize certain frequently calculated
+ * quantities by using shifts and masks in place of divisions
+ * modulos and multiplications.
+ */
+#define ufs_blkoff(loc) ((loc) & uspi->s_qbmask)
+#define ufs_fragoff(loc) ((loc) & uspi->s_qfmask)
+#define ufs_lblktosize(blk) ((blk) << uspi->s_bshift)
+#define ufs_lblkno(loc) ((loc) >> uspi->s_bshift)
+#define ufs_numfrags(loc) ((loc) >> uspi->s_fshift)
+#define ufs_blkroundup(size) (((size) + uspi->s_qbmask) & uspi->s_bmask)
+#define ufs_fragroundup(size) (((size) + uspi->s_qfmask) & uspi->s_fmask)
+#define ufs_fragstoblks(frags) ((frags) >> uspi->s_fpbshift)
+#define ufs_blkstofrags(blks) ((blks) << uspi->s_fpbshift)
+#define ufs_fragnum(fsb) ((fsb) & uspi->s_fpbmask)
+#define ufs_blknum(fsb) ((fsb) & ~uspi->s_fpbmask)
+
+#define UFS_MAXNAMLEN 255
+#define UFS_MAXMNTLEN 512
+#define UFS2_MAXMNTLEN 468
+#define UFS2_MAXVOLLEN 32
+#define UFS_MAXCSBUFS 31
+#define UFS_LINK_MAX 32000
+/*
+#define UFS2_NOCSPTRS ((128 / sizeof(void *)) - 4)
+*/
+#define UFS2_NOCSPTRS 28
+
+/*
+ * UFS_DIR_PAD defines the directory entries boundaries
+ * (must be a multiple of 4)
+ */
+#define UFS_DIR_PAD 4
+#define UFS_DIR_ROUND (UFS_DIR_PAD - 1)
+#define UFS_DIR_REC_LEN(name_len) (((name_len) + 1 + 8 + UFS_DIR_ROUND) & ~UFS_DIR_ROUND)
+
+struct ufs_timeval {
+ __fs32 tv_sec;
+ __fs32 tv_usec;
+};
+
+struct ufs_dir_entry {
+ __fs32 d_ino; /* inode number of this entry */
+ __fs16 d_reclen; /* length of this entry */
+ union {
+ __fs16 d_namlen; /* actual length of d_name */
+ struct {
+ __u8 d_type; /* file type */
+ __u8 d_namlen; /* length of string in d_name */
+ } d_44;
+ } d_u;
+ __u8 d_name[UFS_MAXNAMLEN + 1]; /* file name */
+};
+
+struct ufs_csum {
+ __fs32 cs_ndir; /* number of directories */
+ __fs32 cs_nbfree; /* number of free blocks */
+ __fs32 cs_nifree; /* number of free inodes */
+ __fs32 cs_nffree; /* number of free frags */
+};
+struct ufs2_csum_total {
+ __fs64 cs_ndir; /* number of directories */
+ __fs64 cs_nbfree; /* number of free blocks */
+ __fs64 cs_nifree; /* number of free inodes */
+ __fs64 cs_nffree; /* number of free frags */
+ __fs64 cs_numclusters; /* number of free clusters */
+ __fs64 cs_spare[3]; /* future expansion */
+};
+
+struct ufs_csum_core {
+ __u64 cs_ndir; /* number of directories */
+ __u64 cs_nbfree; /* number of free blocks */
+ __u64 cs_nifree; /* number of free inodes */
+ __u64 cs_nffree; /* number of free frags */
+ __u64 cs_numclusters; /* number of free clusters */
+};
+
+/*
+ * File system flags
+ */
+#define UFS_UNCLEAN 0x01 /* file system not clean at mount (unused) */
+#define UFS_DOSOFTDEP 0x02 /* file system using soft dependencies */
+#define UFS_NEEDSFSCK 0x04 /* needs sync fsck (FreeBSD compat, unused) */
+#define UFS_INDEXDIRS 0x08 /* kernel supports indexed directories */
+#define UFS_ACLS 0x10 /* file system has ACLs enabled */
+#define UFS_MULTILABEL 0x20 /* file system is MAC multi-label */
+#define UFS_FLAGS_UPDATED 0x80 /* flags have been moved to new location */
+
+#if 0
+/*
+ * This is the actual superblock, as it is laid out on the disk.
+ * Do NOT use this structure, because of sizeof(ufs_super_block) > 512 and
+ * it may occupy several blocks, use
+ * struct ufs_super_block_(first,second,third) instead.
+ */
+struct ufs_super_block {
+ union {
+ struct {
+ __fs32 fs_link; /* UNUSED */
+ } fs_42;
+ struct {
+ __fs32 fs_state; /* file system state flag */
+ } fs_sun;
+ } fs_u0;
+ __fs32 fs_rlink; /* UNUSED */
+ __fs32 fs_sblkno; /* addr of super-block in filesys */
+ __fs32 fs_cblkno; /* offset of cyl-block in filesys */
+ __fs32 fs_iblkno; /* offset of inode-blocks in filesys */
+ __fs32 fs_dblkno; /* offset of first data after cg */
+ __fs32 fs_cgoffset; /* cylinder group offset in cylinder */
+ __fs32 fs_cgmask; /* used to calc mod fs_ntrak */
+ __fs32 fs_time; /* last time written -- time_t */
+ __fs32 fs_size; /* number of blocks in fs */
+ __fs32 fs_dsize; /* number of data blocks in fs */
+ __fs32 fs_ncg; /* number of cylinder groups */
+ __fs32 fs_bsize; /* size of basic blocks in fs */
+ __fs32 fs_fsize; /* size of frag blocks in fs */
+ __fs32 fs_frag; /* number of frags in a block in fs */
+/* these are configuration parameters */
+ __fs32 fs_minfree; /* minimum percentage of free blocks */
+ __fs32 fs_rotdelay; /* num of ms for optimal next block */
+ __fs32 fs_rps; /* disk revolutions per second */
+/* these fields can be computed from the others */
+ __fs32 fs_bmask; /* ``blkoff'' calc of blk offsets */
+ __fs32 fs_fmask; /* ``fragoff'' calc of frag offsets */
+ __fs32 fs_bshift; /* ``lblkno'' calc of logical blkno */
+ __fs32 fs_fshift; /* ``numfrags'' calc number of frags */
+/* these are configuration parameters */
+ __fs32 fs_maxcontig; /* max number of contiguous blks */
+ __fs32 fs_maxbpg; /* max number of blks per cyl group */
+/* these fields can be computed from the others */
+ __fs32 fs_fragshift; /* block to frag shift */
+ __fs32 fs_fsbtodb; /* fsbtodb and dbtofsb shift constant */
+ __fs32 fs_sbsize; /* actual size of super block */
+ __fs32 fs_csmask; /* csum block offset */
+ __fs32 fs_csshift; /* csum block number */
+ __fs32 fs_nindir; /* value of NINDIR */
+ __fs32 fs_inopb; /* value of INOPB */
+ __fs32 fs_nspf; /* value of NSPF */
+/* yet another configuration parameter */
+ __fs32 fs_optim; /* optimization preference, see below */
+/* these fields are derived from the hardware */
+ union {
+ struct {
+ __fs32 fs_npsect; /* # sectors/track including spares */
+ } fs_sun;
+ struct {
+ __fs32 fs_state; /* file system state time stamp */
+ } fs_sunx86;
+ } fs_u1;
+ __fs32 fs_interleave; /* hardware sector interleave */
+ __fs32 fs_trackskew; /* sector 0 skew, per track */
+/* a unique id for this filesystem (currently unused and unmaintained) */
+/* In 4.3 Tahoe this space is used by fs_headswitch and fs_trkseek */
+/* Neither of those fields is used in the Tahoe code right now but */
+/* there could be problems if they are. */
+ __fs32 fs_id[2]; /* file system id */
+/* sizes determined by number of cylinder groups and their sizes */
+ __fs32 fs_csaddr; /* blk addr of cyl grp summary area */
+ __fs32 fs_cssize; /* size of cyl grp summary area */
+ __fs32 fs_cgsize; /* cylinder group size */
+/* these fields are derived from the hardware */
+ __fs32 fs_ntrak; /* tracks per cylinder */
+ __fs32 fs_nsect; /* sectors per track */
+ __fs32 fs_spc; /* sectors per cylinder */
+/* this comes from the disk driver partitioning */
+ __fs32 fs_ncyl; /* cylinders in file system */
+/* these fields can be computed from the others */
+ __fs32 fs_cpg; /* cylinders per group */
+ __fs32 fs_ipg; /* inodes per cylinder group */
+ __fs32 fs_fpg; /* blocks per group * fs_frag */
+/* this data must be re-computed after crashes */
+ struct ufs_csum fs_cstotal; /* cylinder summary information */
+/* these fields are cleared at mount time */
+ __s8 fs_fmod; /* super block modified flag */
+ __s8 fs_clean; /* file system is clean flag */
+ __s8 fs_ronly; /* mounted read-only flag */
+ __s8 fs_flags;
+ union {
+ struct {
+ __s8 fs_fsmnt[UFS_MAXMNTLEN];/* name mounted on */
+ __fs32 fs_cgrotor; /* last cg searched */
+ __fs32 fs_csp[UFS_MAXCSBUFS];/*list of fs_cs info buffers */
+ __fs32 fs_maxcluster;
+ __fs32 fs_cpc; /* cyl per cycle in postbl */
+ __fs16 fs_opostbl[16][8]; /* old rotation block list head */
+ } fs_u1;
+ struct {
+ __s8 fs_fsmnt[UFS2_MAXMNTLEN]; /* name mounted on */
+ __u8 fs_volname[UFS2_MAXVOLLEN]; /* volume name */
+ __fs64 fs_swuid; /* system-wide uid */
+ __fs32 fs_pad; /* due to alignment of fs_swuid */
+ __fs32 fs_cgrotor; /* last cg searched */
+ __fs32 fs_ocsp[UFS2_NOCSPTRS]; /*list of fs_cs info buffers */
+ __fs32 fs_contigdirs;/*# of contiguously allocated dirs */
+ __fs32 fs_csp; /* cg summary info buffer for fs_cs */
+ __fs32 fs_maxcluster;
+ __fs32 fs_active;/* used by snapshots to track fs */
+ __fs32 fs_old_cpc; /* cyl per cycle in postbl */
+ __fs32 fs_maxbsize;/*maximum blocking factor permitted */
+ __fs64 fs_sparecon64[17];/*old rotation block list head */
+ __fs64 fs_sblockloc; /* byte offset of standard superblock */
+ struct ufs2_csum_total fs_cstotal;/*cylinder summary information*/
+ struct ufs_timeval fs_time; /* last time written */
+ __fs64 fs_size; /* number of blocks in fs */
+ __fs64 fs_dsize; /* number of data blocks in fs */
+ __fs64 fs_csaddr; /* blk addr of cyl grp summary area */
+ __fs64 fs_pendingblocks;/* blocks in process of being freed */
+ __fs32 fs_pendinginodes;/*inodes in process of being freed */
+ } fs_u2;
+ } fs_u11;
+ union {
+ struct {
+ __fs32 fs_sparecon[53];/* reserved for future constants */
+ __fs32 fs_reclaim;
+ __fs32 fs_sparecon2[1];
+ __fs32 fs_state; /* file system state time stamp */
+ __fs32 fs_qbmask[2]; /* ~usb_bmask */
+ __fs32 fs_qfmask[2]; /* ~usb_fmask */
+ } fs_sun;
+ struct {
+ __fs32 fs_sparecon[53];/* reserved for future constants */
+ __fs32 fs_reclaim;
+ __fs32 fs_sparecon2[1];
+ __fs32 fs_npsect; /* # sectors/track including spares */
+ __fs32 fs_qbmask[2]; /* ~usb_bmask */
+ __fs32 fs_qfmask[2]; /* ~usb_fmask */
+ } fs_sunx86;
+ struct {
+ __fs32 fs_sparecon[50];/* reserved for future constants */
+ __fs32 fs_contigsumsize;/* size of cluster summary array */
+ __fs32 fs_maxsymlinklen;/* max length of an internal symlink */
+ __fs32 fs_inodefmt; /* format of on-disk inodes */
+ __fs32 fs_maxfilesize[2]; /* max representable file size */
+ __fs32 fs_qbmask[2]; /* ~usb_bmask */
+ __fs32 fs_qfmask[2]; /* ~usb_fmask */
+ __fs32 fs_state; /* file system state time stamp */
+ } fs_44;
+ } fs_u2;
+ __fs32 fs_postblformat; /* format of positional layout tables */
+ __fs32 fs_nrpos; /* number of rotational positions */
+ __fs32 fs_postbloff; /* (__s16) rotation block list head */
+ __fs32 fs_rotbloff; /* (__u8) blocks for each rotation */
+ __fs32 fs_magic; /* magic number */
+ __u8 fs_space[1]; /* list of blocks for each rotation */
+};
+#endif/*struct ufs_super_block*/
+
+/*
+ * Preference for optimization.
+ */
+#define UFS_OPTTIME 0 /* minimize allocation time */
+#define UFS_OPTSPACE 1 /* minimize disk fragmentation */
+
+/*
+ * Rotational layout table format types
+ */
+#define UFS_42POSTBLFMT -1 /* 4.2BSD rotational table format */
+#define UFS_DYNAMICPOSTBLFMT 1 /* dynamic rotational table format */
+
+/*
+ * Convert cylinder group to base address of its global summary info.
+ */
+#define fs_cs(indx) s_csp[(indx)]
+
+/*
+ * Cylinder group block for a file system.
+ *
+ * Writable fields in the cylinder group are protected by the associated
+ * super block lock fs->fs_lock.
+ */
+#define CG_MAGIC 0x090255
+#define ufs_cg_chkmagic(sb, ucg) \
+ (fs32_to_cpu((sb), (ucg)->cg_magic) == CG_MAGIC)
+/*
+ * Macros for access to old cylinder group array structures
+ */
+#define ufs_ocg_blktot(sb, ucg) fs32_to_cpu((sb), ((struct ufs_old_cylinder_group *)(ucg))->cg_btot)
+#define ufs_ocg_blks(sb, ucg, cylno) fs32_to_cpu((sb), ((struct ufs_old_cylinder_group *)(ucg))->cg_b[cylno])
+#define ufs_ocg_inosused(sb, ucg) fs32_to_cpu((sb), ((struct ufs_old_cylinder_group *)(ucg))->cg_iused)
+#define ufs_ocg_blksfree(sb, ucg) fs32_to_cpu((sb), ((struct ufs_old_cylinder_group *)(ucg))->cg_free)
+#define ufs_ocg_chkmagic(sb, ucg) \
+ (fs32_to_cpu((sb), ((struct ufs_old_cylinder_group *)(ucg))->cg_magic) == CG_MAGIC)
+
+/*
+ * size of this structure is 172 B
+ */
+struct ufs_cylinder_group {
+ __fs32 cg_link; /* linked list of cyl groups */
+ __fs32 cg_magic; /* magic number */
+ __fs32 cg_time; /* time last written */
+ __fs32 cg_cgx; /* we are the cgx'th cylinder group */
+ __fs16 cg_ncyl; /* number of cyl's this cg */
+ __fs16 cg_niblk; /* number of inode blocks this cg */
+ __fs32 cg_ndblk; /* number of data blocks this cg */
+ struct ufs_csum cg_cs; /* cylinder summary information */
+ __fs32 cg_rotor; /* position of last used block */
+ __fs32 cg_frotor; /* position of last used frag */
+ __fs32 cg_irotor; /* position of last used inode */
+ __fs32 cg_frsum[UFS_MAXFRAG]; /* counts of available frags */
+ __fs32 cg_btotoff; /* (__u32) block totals per cylinder */
+ __fs32 cg_boff; /* (short) free block positions */
+ __fs32 cg_iusedoff; /* (char) used inode map */
+ __fs32 cg_freeoff; /* (u_char) free block map */
+ __fs32 cg_nextfreeoff; /* (u_char) next available space */
+ union {
+ struct {
+ __fs32 cg_clustersumoff; /* (u_int32) counts of avail clusters */
+ __fs32 cg_clusteroff; /* (u_int8) free cluster map */
+ __fs32 cg_nclusterblks; /* number of clusters this cg */
+ __fs32 cg_sparecon[13]; /* reserved for future use */
+ } cg_44;
+ struct {
+ __fs32 cg_clustersumoff;/* (u_int32) counts of avail clusters */
+ __fs32 cg_clusteroff; /* (u_int8) free cluster map */
+ __fs32 cg_nclusterblks;/* number of clusters this cg */
+ __fs32 cg_niblk; /* number of inode blocks this cg */
+ __fs32 cg_initediblk; /* last initialized inode */
+ __fs32 cg_sparecon32[3];/* reserved for future use */
+ __fs64 cg_time; /* time last written */
+ __fs64 cg_sparecon[3]; /* reserved for future use */
+ } cg_u2;
+ __fs32 cg_sparecon[16]; /* reserved for future use */
+ } cg_u;
+ __u8 cg_space[1]; /* space for cylinder group maps */
+/* actually longer */
+};
+
+/* Historic Cylinder group info */
+struct ufs_old_cylinder_group {
+ __fs32 cg_link; /* linked list of cyl groups */
+ __fs32 cg_rlink; /* for incore cyl groups */
+ __fs32 cg_time; /* time last written */
+ __fs32 cg_cgx; /* we are the cgx'th cylinder group */
+ __fs16 cg_ncyl; /* number of cyl's this cg */
+ __fs16 cg_niblk; /* number of inode blocks this cg */
+ __fs32 cg_ndblk; /* number of data blocks this cg */
+ struct ufs_csum cg_cs; /* cylinder summary information */
+ __fs32 cg_rotor; /* position of last used block */
+ __fs32 cg_frotor; /* position of last used frag */
+ __fs32 cg_irotor; /* position of last used inode */
+ __fs32 cg_frsum[8]; /* counts of available frags */
+ __fs32 cg_btot[32]; /* block totals per cylinder */
+ __fs16 cg_b[32][8]; /* positions of free blocks */
+ __u8 cg_iused[256]; /* used inode map */
+ __fs32 cg_magic; /* magic number */
+ __u8 cg_free[1]; /* free block map */
+/* actually longer */
+};
+
+/*
+ * structure of an on-disk inode
+ */
+struct ufs_inode {
+ __fs16 ui_mode; /* 0x0 */
+ __fs16 ui_nlink; /* 0x2 */
+ union {
+ struct {
+ __fs16 ui_suid; /* 0x4 */
+ __fs16 ui_sgid; /* 0x6 */
+ } oldids;
+ __fs32 ui_inumber; /* 0x4 lsf: inode number */
+ __fs32 ui_author; /* 0x4 GNU HURD: author */
+ } ui_u1;
+ __fs64 ui_size; /* 0x8 */
+ struct ufs_timeval ui_atime; /* 0x10 access */
+ struct ufs_timeval ui_mtime; /* 0x18 modification */
+ struct ufs_timeval ui_ctime; /* 0x20 creation */
+ union {
+ struct {
+ __fs32 ui_db[UFS_NDADDR];/* 0x28 data blocks */
+ __fs32 ui_ib[UFS_NINDIR];/* 0x58 indirect blocks */
+ } ui_addr;
+ __u8 ui_symlink[4*(UFS_NDADDR+UFS_NINDIR)];/* 0x28 fast symlink */
+ } ui_u2;
+ __fs32 ui_flags; /* 0x64 immutable, append-only... */
+ __fs32 ui_blocks; /* 0x68 blocks in use */
+ __fs32 ui_gen; /* 0x6c like ext2 i_version, for NFS support */
+ union {
+ struct {
+ __fs32 ui_shadow; /* 0x70 shadow inode with security data */
+ __fs32 ui_uid; /* 0x74 long EFT version of uid */
+ __fs32 ui_gid; /* 0x78 long EFT version of gid */
+ __fs32 ui_oeftflag; /* 0x7c reserved */
+ } ui_sun;
+ struct {
+ __fs32 ui_uid; /* 0x70 File owner */
+ __fs32 ui_gid; /* 0x74 File group */
+ __fs32 ui_spare[2]; /* 0x78 reserved */
+ } ui_44;
+ struct {
+ __fs32 ui_uid; /* 0x70 */
+ __fs32 ui_gid; /* 0x74 */
+ __fs16 ui_modeh; /* 0x78 mode high bits */
+ __fs16 ui_spare; /* 0x7A unused */
+ __fs32 ui_trans; /* 0x7c filesystem translator */
+ } ui_hurd;
+ } ui_u3;
+};
+
+#define UFS_NXADDR 2 /* External addresses in inode. */
+struct ufs2_inode {
+ __fs16 ui_mode; /* 0: IFMT, permissions; see below. */
+ __fs16 ui_nlink; /* 2: File link count. */
+ __fs32 ui_uid; /* 4: File owner. */
+ __fs32 ui_gid; /* 8: File group. */
+ __fs32 ui_blksize; /* 12: Inode blocksize. */
+ __fs64 ui_size; /* 16: File byte count. */
+ __fs64 ui_blocks; /* 24: Bytes actually held. */
+ __fs64 ui_atime; /* 32: Last access time. */
+ __fs64 ui_mtime; /* 40: Last modified time. */
+ __fs64 ui_ctime; /* 48: Last inode change time. */
+ __fs64 ui_birthtime; /* 56: Inode creation time. */
+ __fs32 ui_mtimensec; /* 64: Last modified time. */
+ __fs32 ui_atimensec; /* 68: Last access time. */
+ __fs32 ui_ctimensec; /* 72: Last inode change time. */
+ __fs32 ui_birthnsec; /* 76: Inode creation time. */
+ __fs32 ui_gen; /* 80: Generation number. */
+ __fs32 ui_kernflags; /* 84: Kernel flags. */
+ __fs32 ui_flags; /* 88: Status flags (chflags). */
+ __fs32 ui_extsize; /* 92: External attributes block. */
+ __fs64 ui_extb[UFS_NXADDR];/* 96: External attributes block. */
+ union {
+ struct {
+ __fs64 ui_db[UFS_NDADDR]; /* 112: Direct disk blocks. */
+ __fs64 ui_ib[UFS_NINDIR];/* 208: Indirect disk blocks.*/
+ } ui_addr;
+ __u8 ui_symlink[2*4*(UFS_NDADDR+UFS_NINDIR)];/* 0x28 fast symlink */
+ } ui_u2;
+ __fs64 ui_spare[3]; /* 232: Reserved; currently unused */
+};
+
+
+/* FreeBSD has these in sys/stat.h */
+/* ui_flags that can be set by a file owner */
+#define UFS_UF_SETTABLE 0x0000ffff
+#define UFS_UF_NODUMP 0x00000001 /* do not dump */
+#define UFS_UF_IMMUTABLE 0x00000002 /* immutable (can't "change") */
+#define UFS_UF_APPEND 0x00000004 /* append-only */
+#define UFS_UF_OPAQUE 0x00000008 /* directory is opaque (unionfs) */
+#define UFS_UF_NOUNLINK 0x00000010 /* can't be removed or renamed */
+/* ui_flags that only root can set */
+#define UFS_SF_SETTABLE 0xffff0000
+#define UFS_SF_ARCHIVED 0x00010000 /* archived */
+#define UFS_SF_IMMUTABLE 0x00020000 /* immutable (can't "change") */
+#define UFS_SF_APPEND 0x00040000 /* append-only */
+#define UFS_SF_NOUNLINK 0x00100000 /* can't be removed or renamed */
+
+/*
+ * This structure is used for reading disk structures larger
+ * than the size of fragment.
+ */
+struct ufs_buffer_head {
+ __u64 fragment; /* first fragment */
+ __u64 count; /* number of fragments */
+ struct buffer_head * bh[UFS_MAXFRAG]; /* buffers */
+};
+
+struct ufs_cg_private_info {
+ struct ufs_buffer_head c_ubh;
+ __u32 c_cgx; /* number of cylidner group */
+ __u16 c_ncyl; /* number of cyl's this cg */
+ __u16 c_niblk; /* number of inode blocks this cg */
+ __u32 c_ndblk; /* number of data blocks this cg */
+ __u32 c_rotor; /* position of last used block */
+ __u32 c_frotor; /* position of last used frag */
+ __u32 c_irotor; /* position of last used inode */
+ __u32 c_btotoff; /* (__u32) block totals per cylinder */
+ __u32 c_boff; /* (short) free block positions */
+ __u32 c_iusedoff; /* (char) used inode map */
+ __u32 c_freeoff; /* (u_char) free block map */
+ __u32 c_nextfreeoff; /* (u_char) next available space */
+ __u32 c_clustersumoff;/* (u_int32) counts of avail clusters */
+ __u32 c_clusteroff; /* (u_int8) free cluster map */
+ __u32 c_nclusterblks; /* number of clusters this cg */
+};
+
+
+struct ufs_sb_private_info {
+ struct ufs_buffer_head s_ubh; /* buffer containing super block */
+ struct ufs_csum_core cs_total;
+ __u32 s_sblkno; /* offset of super-blocks in filesys */
+ __u32 s_cblkno; /* offset of cg-block in filesys */
+ __u32 s_iblkno; /* offset of inode-blocks in filesys */
+ __u32 s_dblkno; /* offset of first data after cg */
+ __u32 s_cgoffset; /* cylinder group offset in cylinder */
+ __u32 s_cgmask; /* used to calc mod fs_ntrak */
+ __u32 s_size; /* number of blocks (fragments) in fs */
+ __u32 s_dsize; /* number of data blocks in fs */
+ __u64 s_u2_size; /* ufs2: number of blocks (fragments) in fs */
+ __u64 s_u2_dsize; /*ufs2: number of data blocks in fs */
+ __u32 s_ncg; /* number of cylinder groups */
+ __u32 s_bsize; /* size of basic blocks */
+ __u32 s_fsize; /* size of fragments */
+ __u32 s_fpb; /* fragments per block */
+ __u32 s_minfree; /* minimum percentage of free blocks */
+ __u32 s_bmask; /* `blkoff'' calc of blk offsets */
+ __u32 s_fmask; /* s_fsize mask */
+ __u32 s_bshift; /* `lblkno'' calc of logical blkno */
+ __u32 s_fshift; /* s_fsize shift */
+ __u32 s_fpbshift; /* fragments per block shift */
+ __u32 s_fsbtodb; /* fsbtodb and dbtofsb shift constant */
+ __u32 s_sbsize; /* actual size of super block */
+ __u32 s_csmask; /* csum block offset */
+ __u32 s_csshift; /* csum block number */
+ __u32 s_nindir; /* value of NINDIR */
+ __u32 s_inopb; /* value of INOPB */
+ __u32 s_nspf; /* value of NSPF */
+ __u32 s_npsect; /* # sectors/track including spares */
+ __u32 s_interleave; /* hardware sector interleave */
+ __u32 s_trackskew; /* sector 0 skew, per track */
+ __u64 s_csaddr; /* blk addr of cyl grp summary area */
+ __u32 s_cssize; /* size of cyl grp summary area */
+ __u32 s_cgsize; /* cylinder group size */
+ __u32 s_ntrak; /* tracks per cylinder */
+ __u32 s_nsect; /* sectors per track */
+ __u32 s_spc; /* sectors per cylinder */
+ __u32 s_ipg; /* inodes per cylinder group */
+ __u32 s_fpg; /* fragments per group */
+ __u32 s_cpc; /* cyl per cycle in postbl */
+ __s32 s_contigsumsize;/* size of cluster summary array, 44bsd */
+ __s64 s_qbmask; /* ~usb_bmask */
+ __s64 s_qfmask; /* ~usb_fmask */
+ __s32 s_postblformat; /* format of positional layout tables */
+ __s32 s_nrpos; /* number of rotational positions */
+ __s32 s_postbloff; /* (__s16) rotation block list head */
+ __s32 s_rotbloff; /* (__u8) blocks for each rotation */
+
+ __u32 s_fpbmask; /* fragments per block mask */
+ __u32 s_apb; /* address per block */
+ __u32 s_2apb; /* address per block^2 */
+ __u32 s_3apb; /* address per block^3 */
+ __u32 s_apbmask; /* address per block mask */
+ __u32 s_apbshift; /* address per block shift */
+ __u32 s_2apbshift; /* address per block shift * 2 */
+ __u32 s_3apbshift; /* address per block shift * 3 */
+ __u32 s_nspfshift; /* number of sector per fragment shift */
+ __u32 s_nspb; /* number of sector per block */
+ __u32 s_inopf; /* inodes per fragment */
+ __u32 s_sbbase; /* offset of NeXTstep superblock */
+ __u32 s_bpf; /* bits per fragment */
+ __u32 s_bpfshift; /* bits per fragment shift*/
+ __u32 s_bpfmask; /* bits per fragment mask */
+
+ __u32 s_maxsymlinklen;/* upper limit on fast symlinks' size */
+ __s32 fs_magic; /* filesystem magic */
+ unsigned int s_dirblksize;
+};
+
+/*
+ * Sizes of this structures are:
+ * ufs_super_block_first 512
+ * ufs_super_block_second 512
+ * ufs_super_block_third 356
+ */
+struct ufs_super_block_first {
+ union {
+ struct {
+ __fs32 fs_link; /* UNUSED */
+ } fs_42;
+ struct {
+ __fs32 fs_state; /* file system state flag */
+ } fs_sun;
+ } fs_u0;
+ __fs32 fs_rlink;
+ __fs32 fs_sblkno;
+ __fs32 fs_cblkno;
+ __fs32 fs_iblkno;
+ __fs32 fs_dblkno;
+ __fs32 fs_cgoffset;
+ __fs32 fs_cgmask;
+ __fs32 fs_time;
+ __fs32 fs_size;
+ __fs32 fs_dsize;
+ __fs32 fs_ncg;
+ __fs32 fs_bsize;
+ __fs32 fs_fsize;
+ __fs32 fs_frag;
+ __fs32 fs_minfree;
+ __fs32 fs_rotdelay;
+ __fs32 fs_rps;
+ __fs32 fs_bmask;
+ __fs32 fs_fmask;
+ __fs32 fs_bshift;
+ __fs32 fs_fshift;
+ __fs32 fs_maxcontig;
+ __fs32 fs_maxbpg;
+ __fs32 fs_fragshift;
+ __fs32 fs_fsbtodb;
+ __fs32 fs_sbsize;
+ __fs32 fs_csmask;
+ __fs32 fs_csshift;
+ __fs32 fs_nindir;
+ __fs32 fs_inopb;
+ __fs32 fs_nspf;
+ __fs32 fs_optim;
+ union {
+ struct {
+ __fs32 fs_npsect;
+ } fs_sun;
+ struct {
+ __fs32 fs_state;
+ } fs_sunx86;
+ } fs_u1;
+ __fs32 fs_interleave;
+ __fs32 fs_trackskew;
+ __fs32 fs_id[2];
+ __fs32 fs_csaddr;
+ __fs32 fs_cssize;
+ __fs32 fs_cgsize;
+ __fs32 fs_ntrak;
+ __fs32 fs_nsect;
+ __fs32 fs_spc;
+ __fs32 fs_ncyl;
+ __fs32 fs_cpg;
+ __fs32 fs_ipg;
+ __fs32 fs_fpg;
+ struct ufs_csum fs_cstotal;
+ __s8 fs_fmod;
+ __s8 fs_clean;
+ __s8 fs_ronly;
+ __s8 fs_flags;
+ __s8 fs_fsmnt[UFS_MAXMNTLEN - 212];
+
+};
+
+struct ufs_super_block_second {
+ union {
+ struct {
+ __s8 fs_fsmnt[212];
+ __fs32 fs_cgrotor;
+ __fs32 fs_csp[UFS_MAXCSBUFS];
+ __fs32 fs_maxcluster;
+ __fs32 fs_cpc;
+ __fs16 fs_opostbl[82];
+ } fs_u1;
+ struct {
+ __s8 fs_fsmnt[UFS2_MAXMNTLEN - UFS_MAXMNTLEN + 212];
+ __u8 fs_volname[UFS2_MAXVOLLEN];
+ __fs64 fs_swuid;
+ __fs32 fs_pad;
+ __fs32 fs_cgrotor;
+ __fs32 fs_ocsp[UFS2_NOCSPTRS];
+ __fs32 fs_contigdirs;
+ __fs32 fs_csp;
+ __fs32 fs_maxcluster;
+ __fs32 fs_active;
+ __fs32 fs_old_cpc;
+ __fs32 fs_maxbsize;
+ __fs64 fs_sparecon64[17];
+ __fs64 fs_sblockloc;
+ __fs64 cs_ndir;
+ __fs64 cs_nbfree;
+ } fs_u2;
+ } fs_un;
+};
+
+struct ufs_super_block_third {
+ union {
+ struct {
+ __fs16 fs_opostbl[46];
+ } fs_u1;
+ struct {
+ __fs64 cs_nifree; /* number of free inodes */
+ __fs64 cs_nffree; /* number of free frags */
+ __fs64 cs_numclusters; /* number of free clusters */
+ __fs64 cs_spare[3]; /* future expansion */
+ struct ufs_timeval fs_time; /* last time written */
+ __fs64 fs_size; /* number of blocks in fs */
+ __fs64 fs_dsize; /* number of data blocks in fs */
+ __fs64 fs_csaddr; /* blk addr of cyl grp summary area */
+ __fs64 fs_pendingblocks;/* blocks in process of being freed */
+ __fs32 fs_pendinginodes;/*inodes in process of being freed */
+ } __attribute__ ((packed)) fs_u2;
+ } fs_un1;
+ union {
+ struct {
+ __fs32 fs_sparecon[53];/* reserved for future constants */
+ __fs32 fs_reclaim;
+ __fs32 fs_sparecon2[1];
+ __fs32 fs_state; /* file system state time stamp */
+ __fs32 fs_qbmask[2]; /* ~usb_bmask */
+ __fs32 fs_qfmask[2]; /* ~usb_fmask */
+ } fs_sun;
+ struct {
+ __fs32 fs_sparecon[53];/* reserved for future constants */
+ __fs32 fs_reclaim;
+ __fs32 fs_sparecon2[1];
+ __fs32 fs_npsect; /* # sectors/track including spares */
+ __fs32 fs_qbmask[2]; /* ~usb_bmask */
+ __fs32 fs_qfmask[2]; /* ~usb_fmask */
+ } fs_sunx86;
+ struct {
+ __fs32 fs_sparecon[50];/* reserved for future constants */
+ __fs32 fs_contigsumsize;/* size of cluster summary array */
+ __fs32 fs_maxsymlinklen;/* max length of an internal symlink */
+ __fs32 fs_inodefmt; /* format of on-disk inodes */
+ __fs32 fs_maxfilesize[2]; /* max representable file size */
+ __fs32 fs_qbmask[2]; /* ~usb_bmask */
+ __fs32 fs_qfmask[2]; /* ~usb_fmask */
+ __fs32 fs_state; /* file system state time stamp */
+ } fs_44;
+ } fs_un2;
+ __fs32 fs_postblformat;
+ __fs32 fs_nrpos;
+ __fs32 fs_postbloff;
+ __fs32 fs_rotbloff;
+ __fs32 fs_magic;
+ __u8 fs_space[1];
+};
+
+#endif /* __LINUX_UFS_FS_H */
diff --git a/fs/ufs/util.c b/fs/ufs/util.c
new file mode 100644
index 000000000..b6c2f94e0
--- /dev/null
+++ b/fs/ufs/util.c
@@ -0,0 +1,282 @@
+/*
+ * linux/fs/ufs/util.c
+ *
+ * Copyright (C) 1998
+ * Daniel Pirkl <daniel.pirkl@email.cz>
+ * Charles University, Faculty of Mathematics and Physics
+ */
+
+#include <linux/string.h>
+#include <linux/slab.h>
+#include <linux/buffer_head.h>
+
+#include "ufs_fs.h"
+#include "ufs.h"
+#include "swab.h"
+#include "util.h"
+
+struct ufs_buffer_head * _ubh_bread_ (struct ufs_sb_private_info * uspi,
+ struct super_block *sb, u64 fragment, u64 size)
+{
+ struct ufs_buffer_head * ubh;
+ unsigned i, j ;
+ u64 count = 0;
+ if (size & ~uspi->s_fmask)
+ return NULL;
+ count = size >> uspi->s_fshift;
+ if (count > UFS_MAXFRAG)
+ return NULL;
+ ubh = kmalloc (sizeof (struct ufs_buffer_head), GFP_NOFS);
+ if (!ubh)
+ return NULL;
+ ubh->fragment = fragment;
+ ubh->count = count;
+ for (i = 0; i < count; i++)
+ if (!(ubh->bh[i] = sb_bread(sb, fragment + i)))
+ goto failed;
+ for (; i < UFS_MAXFRAG; i++)
+ ubh->bh[i] = NULL;
+ return ubh;
+failed:
+ for (j = 0; j < i; j++)
+ brelse (ubh->bh[j]);
+ kfree(ubh);
+ return NULL;
+}
+
+struct ufs_buffer_head * ubh_bread_uspi (struct ufs_sb_private_info * uspi,
+ struct super_block *sb, u64 fragment, u64 size)
+{
+ unsigned i, j;
+ u64 count = 0;
+ if (size & ~uspi->s_fmask)
+ return NULL;
+ count = size >> uspi->s_fshift;
+ if (count <= 0 || count > UFS_MAXFRAG)
+ return NULL;
+ USPI_UBH(uspi)->fragment = fragment;
+ USPI_UBH(uspi)->count = count;
+ for (i = 0; i < count; i++)
+ if (!(USPI_UBH(uspi)->bh[i] = sb_bread(sb, fragment + i)))
+ goto failed;
+ for (; i < UFS_MAXFRAG; i++)
+ USPI_UBH(uspi)->bh[i] = NULL;
+ return USPI_UBH(uspi);
+failed:
+ for (j = 0; j < i; j++)
+ brelse (USPI_UBH(uspi)->bh[j]);
+ return NULL;
+}
+
+void ubh_brelse (struct ufs_buffer_head * ubh)
+{
+ unsigned i;
+ if (!ubh)
+ return;
+ for (i = 0; i < ubh->count; i++)
+ brelse (ubh->bh[i]);
+ kfree (ubh);
+}
+
+void ubh_brelse_uspi (struct ufs_sb_private_info * uspi)
+{
+ unsigned i;
+ if (!USPI_UBH(uspi))
+ return;
+ for ( i = 0; i < USPI_UBH(uspi)->count; i++ ) {
+ brelse (USPI_UBH(uspi)->bh[i]);
+ USPI_UBH(uspi)->bh[i] = NULL;
+ }
+}
+
+void ubh_mark_buffer_dirty (struct ufs_buffer_head * ubh)
+{
+ unsigned i;
+ if (!ubh)
+ return;
+ for ( i = 0; i < ubh->count; i++ )
+ mark_buffer_dirty (ubh->bh[i]);
+}
+
+void ubh_mark_buffer_uptodate (struct ufs_buffer_head * ubh, int flag)
+{
+ unsigned i;
+ if (!ubh)
+ return;
+ if (flag) {
+ for ( i = 0; i < ubh->count; i++ )
+ set_buffer_uptodate (ubh->bh[i]);
+ } else {
+ for ( i = 0; i < ubh->count; i++ )
+ clear_buffer_uptodate (ubh->bh[i]);
+ }
+}
+
+void ubh_sync_block(struct ufs_buffer_head *ubh)
+{
+ if (ubh) {
+ unsigned i;
+
+ for (i = 0; i < ubh->count; i++)
+ write_dirty_buffer(ubh->bh[i], WRITE);
+
+ for (i = 0; i < ubh->count; i++)
+ wait_on_buffer(ubh->bh[i]);
+ }
+}
+
+void ubh_bforget (struct ufs_buffer_head * ubh)
+{
+ unsigned i;
+ if (!ubh)
+ return;
+ for ( i = 0; i < ubh->count; i++ ) if ( ubh->bh[i] )
+ bforget (ubh->bh[i]);
+}
+
+int ubh_buffer_dirty (struct ufs_buffer_head * ubh)
+{
+ unsigned i;
+ unsigned result = 0;
+ if (!ubh)
+ return 0;
+ for ( i = 0; i < ubh->count; i++ )
+ result |= buffer_dirty(ubh->bh[i]);
+ return result;
+}
+
+void _ubh_ubhcpymem_(struct ufs_sb_private_info * uspi,
+ unsigned char * mem, struct ufs_buffer_head * ubh, unsigned size)
+{
+ unsigned len, bhno;
+ if (size > (ubh->count << uspi->s_fshift))
+ size = ubh->count << uspi->s_fshift;
+ bhno = 0;
+ while (size) {
+ len = min_t(unsigned int, size, uspi->s_fsize);
+ memcpy (mem, ubh->bh[bhno]->b_data, len);
+ mem += uspi->s_fsize;
+ size -= len;
+ bhno++;
+ }
+}
+
+void _ubh_memcpyubh_(struct ufs_sb_private_info * uspi,
+ struct ufs_buffer_head * ubh, unsigned char * mem, unsigned size)
+{
+ unsigned len, bhno;
+ if (size > (ubh->count << uspi->s_fshift))
+ size = ubh->count << uspi->s_fshift;
+ bhno = 0;
+ while (size) {
+ len = min_t(unsigned int, size, uspi->s_fsize);
+ memcpy (ubh->bh[bhno]->b_data, mem, len);
+ mem += uspi->s_fsize;
+ size -= len;
+ bhno++;
+ }
+}
+
+dev_t
+ufs_get_inode_dev(struct super_block *sb, struct ufs_inode_info *ufsi)
+{
+ __u32 fs32;
+ dev_t dev;
+
+ if ((UFS_SB(sb)->s_flags & UFS_ST_MASK) == UFS_ST_SUNx86)
+ fs32 = fs32_to_cpu(sb, ufsi->i_u1.i_data[1]);
+ else
+ fs32 = fs32_to_cpu(sb, ufsi->i_u1.i_data[0]);
+ switch (UFS_SB(sb)->s_flags & UFS_ST_MASK) {
+ case UFS_ST_SUNx86:
+ case UFS_ST_SUN:
+ if ((fs32 & 0xffff0000) == 0 ||
+ (fs32 & 0xffff0000) == 0xffff0000)
+ dev = old_decode_dev(fs32 & 0x7fff);
+ else
+ dev = MKDEV(sysv_major(fs32), sysv_minor(fs32));
+ break;
+
+ default:
+ dev = old_decode_dev(fs32);
+ break;
+ }
+ return dev;
+}
+
+void
+ufs_set_inode_dev(struct super_block *sb, struct ufs_inode_info *ufsi, dev_t dev)
+{
+ __u32 fs32;
+
+ switch (UFS_SB(sb)->s_flags & UFS_ST_MASK) {
+ case UFS_ST_SUNx86:
+ case UFS_ST_SUN:
+ fs32 = sysv_encode_dev(dev);
+ if ((fs32 & 0xffff8000) == 0) {
+ fs32 = old_encode_dev(dev);
+ }
+ break;
+
+ default:
+ fs32 = old_encode_dev(dev);
+ break;
+ }
+ if ((UFS_SB(sb)->s_flags & UFS_ST_MASK) == UFS_ST_SUNx86)
+ ufsi->i_u1.i_data[1] = cpu_to_fs32(sb, fs32);
+ else
+ ufsi->i_u1.i_data[0] = cpu_to_fs32(sb, fs32);
+}
+
+/**
+ * ufs_get_locked_page() - locate, pin and lock a pagecache page, if not exist
+ * read it from disk.
+ * @mapping: the address_space to search
+ * @index: the page index
+ *
+ * Locates the desired pagecache page, if not exist we'll read it,
+ * locks it, increments its reference
+ * count and returns its address.
+ *
+ */
+
+struct page *ufs_get_locked_page(struct address_space *mapping,
+ pgoff_t index)
+{
+ struct page *page;
+
+ page = find_lock_page(mapping, index);
+ if (!page) {
+ page = read_mapping_page(mapping, index, NULL);
+
+ if (IS_ERR(page)) {
+ printk(KERN_ERR "ufs_change_blocknr: "
+ "read_mapping_page error: ino %lu, index: %lu\n",
+ mapping->host->i_ino, index);
+ goto out;
+ }
+
+ lock_page(page);
+
+ if (unlikely(page->mapping == NULL)) {
+ /* Truncate got there first */
+ unlock_page(page);
+ page_cache_release(page);
+ page = NULL;
+ goto out;
+ }
+
+ if (!PageUptodate(page) || PageError(page)) {
+ unlock_page(page);
+ page_cache_release(page);
+
+ printk(KERN_ERR "ufs_change_blocknr: "
+ "can not read page: ino %lu, index: %lu\n",
+ mapping->host->i_ino, index);
+
+ page = ERR_PTR(-EIO);
+ }
+ }
+out:
+ return page;
+}
diff --git a/fs/ufs/util.h b/fs/ufs/util.h
new file mode 100644
index 000000000..954175928
--- /dev/null
+++ b/fs/ufs/util.h
@@ -0,0 +1,592 @@
+/*
+ * linux/fs/ufs/util.h
+ *
+ * Copyright (C) 1998
+ * Daniel Pirkl <daniel.pirkl@email.cz>
+ * Charles University, Faculty of Mathematics and Physics
+ */
+
+#include <linux/buffer_head.h>
+#include <linux/fs.h>
+#include "swab.h"
+
+
+/*
+ * some useful macros
+ */
+#define in_range(b,first,len) ((b)>=(first)&&(b)<(first)+(len))
+
+/*
+ * functions used for retyping
+ */
+static inline struct ufs_buffer_head *UCPI_UBH(struct ufs_cg_private_info *cpi)
+{
+ return &cpi->c_ubh;
+}
+static inline struct ufs_buffer_head *USPI_UBH(struct ufs_sb_private_info *spi)
+{
+ return &spi->s_ubh;
+}
+
+
+
+/*
+ * macros used for accessing structures
+ */
+static inline s32
+ufs_get_fs_state(struct super_block *sb, struct ufs_super_block_first *usb1,
+ struct ufs_super_block_third *usb3)
+{
+ switch (UFS_SB(sb)->s_flags & UFS_ST_MASK) {
+ case UFS_ST_SUNOS:
+ if (fs32_to_cpu(sb, usb3->fs_postblformat) == UFS_42POSTBLFMT)
+ return fs32_to_cpu(sb, usb1->fs_u0.fs_sun.fs_state);
+ /* Fall Through to UFS_ST_SUN */
+ case UFS_ST_SUN:
+ return fs32_to_cpu(sb, usb3->fs_un2.fs_sun.fs_state);
+ case UFS_ST_SUNx86:
+ return fs32_to_cpu(sb, usb1->fs_u1.fs_sunx86.fs_state);
+ case UFS_ST_44BSD:
+ default:
+ return fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_state);
+ }
+}
+
+static inline void
+ufs_set_fs_state(struct super_block *sb, struct ufs_super_block_first *usb1,
+ struct ufs_super_block_third *usb3, s32 value)
+{
+ switch (UFS_SB(sb)->s_flags & UFS_ST_MASK) {
+ case UFS_ST_SUNOS:
+ if (fs32_to_cpu(sb, usb3->fs_postblformat) == UFS_42POSTBLFMT) {
+ usb1->fs_u0.fs_sun.fs_state = cpu_to_fs32(sb, value);
+ break;
+ }
+ /* Fall Through to UFS_ST_SUN */
+ case UFS_ST_SUN:
+ usb3->fs_un2.fs_sun.fs_state = cpu_to_fs32(sb, value);
+ break;
+ case UFS_ST_SUNx86:
+ usb1->fs_u1.fs_sunx86.fs_state = cpu_to_fs32(sb, value);
+ break;
+ case UFS_ST_44BSD:
+ usb3->fs_un2.fs_44.fs_state = cpu_to_fs32(sb, value);
+ break;
+ }
+}
+
+static inline u32
+ufs_get_fs_npsect(struct super_block *sb, struct ufs_super_block_first *usb1,
+ struct ufs_super_block_third *usb3)
+{
+ if ((UFS_SB(sb)->s_flags & UFS_ST_MASK) == UFS_ST_SUNx86)
+ return fs32_to_cpu(sb, usb3->fs_un2.fs_sunx86.fs_npsect);
+ else
+ return fs32_to_cpu(sb, usb1->fs_u1.fs_sun.fs_npsect);
+}
+
+static inline u64
+ufs_get_fs_qbmask(struct super_block *sb, struct ufs_super_block_third *usb3)
+{
+ __fs64 tmp;
+
+ switch (UFS_SB(sb)->s_flags & UFS_ST_MASK) {
+ case UFS_ST_SUNOS:
+ case UFS_ST_SUN:
+ ((__fs32 *)&tmp)[0] = usb3->fs_un2.fs_sun.fs_qbmask[0];
+ ((__fs32 *)&tmp)[1] = usb3->fs_un2.fs_sun.fs_qbmask[1];
+ break;
+ case UFS_ST_SUNx86:
+ ((__fs32 *)&tmp)[0] = usb3->fs_un2.fs_sunx86.fs_qbmask[0];
+ ((__fs32 *)&tmp)[1] = usb3->fs_un2.fs_sunx86.fs_qbmask[1];
+ break;
+ case UFS_ST_44BSD:
+ ((__fs32 *)&tmp)[0] = usb3->fs_un2.fs_44.fs_qbmask[0];
+ ((__fs32 *)&tmp)[1] = usb3->fs_un2.fs_44.fs_qbmask[1];
+ break;
+ }
+
+ return fs64_to_cpu(sb, tmp);
+}
+
+static inline u64
+ufs_get_fs_qfmask(struct super_block *sb, struct ufs_super_block_third *usb3)
+{
+ __fs64 tmp;
+
+ switch (UFS_SB(sb)->s_flags & UFS_ST_MASK) {
+ case UFS_ST_SUNOS:
+ case UFS_ST_SUN:
+ ((__fs32 *)&tmp)[0] = usb3->fs_un2.fs_sun.fs_qfmask[0];
+ ((__fs32 *)&tmp)[1] = usb3->fs_un2.fs_sun.fs_qfmask[1];
+ break;
+ case UFS_ST_SUNx86:
+ ((__fs32 *)&tmp)[0] = usb3->fs_un2.fs_sunx86.fs_qfmask[0];
+ ((__fs32 *)&tmp)[1] = usb3->fs_un2.fs_sunx86.fs_qfmask[1];
+ break;
+ case UFS_ST_44BSD:
+ ((__fs32 *)&tmp)[0] = usb3->fs_un2.fs_44.fs_qfmask[0];
+ ((__fs32 *)&tmp)[1] = usb3->fs_un2.fs_44.fs_qfmask[1];
+ break;
+ }
+
+ return fs64_to_cpu(sb, tmp);
+}
+
+static inline u16
+ufs_get_de_namlen(struct super_block *sb, struct ufs_dir_entry *de)
+{
+ if ((UFS_SB(sb)->s_flags & UFS_DE_MASK) == UFS_DE_OLD)
+ return fs16_to_cpu(sb, de->d_u.d_namlen);
+ else
+ return de->d_u.d_44.d_namlen; /* XXX this seems wrong */
+}
+
+static inline void
+ufs_set_de_namlen(struct super_block *sb, struct ufs_dir_entry *de, u16 value)
+{
+ if ((UFS_SB(sb)->s_flags & UFS_DE_MASK) == UFS_DE_OLD)
+ de->d_u.d_namlen = cpu_to_fs16(sb, value);
+ else
+ de->d_u.d_44.d_namlen = value; /* XXX this seems wrong */
+}
+
+static inline void
+ufs_set_de_type(struct super_block *sb, struct ufs_dir_entry *de, int mode)
+{
+ if ((UFS_SB(sb)->s_flags & UFS_DE_MASK) != UFS_DE_44BSD)
+ return;
+
+ /*
+ * TODO turn this into a table lookup
+ */
+ switch (mode & S_IFMT) {
+ case S_IFSOCK:
+ de->d_u.d_44.d_type = DT_SOCK;
+ break;
+ case S_IFLNK:
+ de->d_u.d_44.d_type = DT_LNK;
+ break;
+ case S_IFREG:
+ de->d_u.d_44.d_type = DT_REG;
+ break;
+ case S_IFBLK:
+ de->d_u.d_44.d_type = DT_BLK;
+ break;
+ case S_IFDIR:
+ de->d_u.d_44.d_type = DT_DIR;
+ break;
+ case S_IFCHR:
+ de->d_u.d_44.d_type = DT_CHR;
+ break;
+ case S_IFIFO:
+ de->d_u.d_44.d_type = DT_FIFO;
+ break;
+ default:
+ de->d_u.d_44.d_type = DT_UNKNOWN;
+ }
+}
+
+static inline u32
+ufs_get_inode_uid(struct super_block *sb, struct ufs_inode *inode)
+{
+ switch (UFS_SB(sb)->s_flags & UFS_UID_MASK) {
+ case UFS_UID_44BSD:
+ return fs32_to_cpu(sb, inode->ui_u3.ui_44.ui_uid);
+ case UFS_UID_EFT:
+ if (inode->ui_u1.oldids.ui_suid == 0xFFFF)
+ return fs32_to_cpu(sb, inode->ui_u3.ui_sun.ui_uid);
+ /* Fall through */
+ default:
+ return fs16_to_cpu(sb, inode->ui_u1.oldids.ui_suid);
+ }
+}
+
+static inline void
+ufs_set_inode_uid(struct super_block *sb, struct ufs_inode *inode, u32 value)
+{
+ switch (UFS_SB(sb)->s_flags & UFS_UID_MASK) {
+ case UFS_UID_44BSD:
+ inode->ui_u3.ui_44.ui_uid = cpu_to_fs32(sb, value);
+ inode->ui_u1.oldids.ui_suid = cpu_to_fs16(sb, value);
+ break;
+ case UFS_UID_EFT:
+ inode->ui_u3.ui_sun.ui_uid = cpu_to_fs32(sb, value);
+ if (value > 0xFFFF)
+ value = 0xFFFF;
+ /* Fall through */
+ default:
+ inode->ui_u1.oldids.ui_suid = cpu_to_fs16(sb, value);
+ break;
+ }
+}
+
+static inline u32
+ufs_get_inode_gid(struct super_block *sb, struct ufs_inode *inode)
+{
+ switch (UFS_SB(sb)->s_flags & UFS_UID_MASK) {
+ case UFS_UID_44BSD:
+ return fs32_to_cpu(sb, inode->ui_u3.ui_44.ui_gid);
+ case UFS_UID_EFT:
+ if (inode->ui_u1.oldids.ui_suid == 0xFFFF)
+ return fs32_to_cpu(sb, inode->ui_u3.ui_sun.ui_gid);
+ /* Fall through */
+ default:
+ return fs16_to_cpu(sb, inode->ui_u1.oldids.ui_sgid);
+ }
+}
+
+static inline void
+ufs_set_inode_gid(struct super_block *sb, struct ufs_inode *inode, u32 value)
+{
+ switch (UFS_SB(sb)->s_flags & UFS_UID_MASK) {
+ case UFS_UID_44BSD:
+ inode->ui_u3.ui_44.ui_gid = cpu_to_fs32(sb, value);
+ inode->ui_u1.oldids.ui_sgid = cpu_to_fs16(sb, value);
+ break;
+ case UFS_UID_EFT:
+ inode->ui_u3.ui_sun.ui_gid = cpu_to_fs32(sb, value);
+ if (value > 0xFFFF)
+ value = 0xFFFF;
+ /* Fall through */
+ default:
+ inode->ui_u1.oldids.ui_sgid = cpu_to_fs16(sb, value);
+ break;
+ }
+}
+
+extern dev_t ufs_get_inode_dev(struct super_block *, struct ufs_inode_info *);
+extern void ufs_set_inode_dev(struct super_block *, struct ufs_inode_info *, dev_t);
+extern int ufs_prepare_chunk(struct page *page, loff_t pos, unsigned len);
+
+/*
+ * These functions manipulate ufs buffers
+ */
+#define ubh_bread(sb,fragment,size) _ubh_bread_(uspi,sb,fragment,size)
+extern struct ufs_buffer_head * _ubh_bread_(struct ufs_sb_private_info *, struct super_block *, u64 , u64);
+extern struct ufs_buffer_head * ubh_bread_uspi(struct ufs_sb_private_info *, struct super_block *, u64, u64);
+extern void ubh_brelse (struct ufs_buffer_head *);
+extern void ubh_brelse_uspi (struct ufs_sb_private_info *);
+extern void ubh_mark_buffer_dirty (struct ufs_buffer_head *);
+extern void ubh_mark_buffer_uptodate (struct ufs_buffer_head *, int);
+extern void ubh_sync_block(struct ufs_buffer_head *);
+extern void ubh_bforget (struct ufs_buffer_head *);
+extern int ubh_buffer_dirty (struct ufs_buffer_head *);
+#define ubh_ubhcpymem(mem,ubh,size) _ubh_ubhcpymem_(uspi,mem,ubh,size)
+extern void _ubh_ubhcpymem_(struct ufs_sb_private_info *, unsigned char *, struct ufs_buffer_head *, unsigned);
+#define ubh_memcpyubh(ubh,mem,size) _ubh_memcpyubh_(uspi,ubh,mem,size)
+extern void _ubh_memcpyubh_(struct ufs_sb_private_info *, struct ufs_buffer_head *, unsigned char *, unsigned);
+
+/* This functions works with cache pages*/
+extern struct page *ufs_get_locked_page(struct address_space *mapping,
+ pgoff_t index);
+static inline void ufs_put_locked_page(struct page *page)
+{
+ unlock_page(page);
+ page_cache_release(page);
+}
+
+
+/*
+ * macros and inline function to get important structures from ufs_sb_private_info
+ */
+
+static inline void *get_usb_offset(struct ufs_sb_private_info *uspi,
+ unsigned int offset)
+{
+ unsigned int index;
+
+ index = offset >> uspi->s_fshift;
+ offset &= ~uspi->s_fmask;
+ return uspi->s_ubh.bh[index]->b_data + offset;
+}
+
+#define ubh_get_usb_first(uspi) \
+ ((struct ufs_super_block_first *)get_usb_offset((uspi), 0))
+
+#define ubh_get_usb_second(uspi) \
+ ((struct ufs_super_block_second *)get_usb_offset((uspi), UFS_SECTOR_SIZE))
+
+#define ubh_get_usb_third(uspi) \
+ ((struct ufs_super_block_third *)get_usb_offset((uspi), 2*UFS_SECTOR_SIZE))
+
+
+#define ubh_get_ucg(ubh) \
+ ((struct ufs_cylinder_group *)((ubh)->bh[0]->b_data))
+
+
+/*
+ * Extract byte from ufs_buffer_head
+ * Extract the bits for a block from a map inside ufs_buffer_head
+ */
+#define ubh_get_addr8(ubh,begin) \
+ ((u8*)(ubh)->bh[(begin) >> uspi->s_fshift]->b_data + \
+ ((begin) & ~uspi->s_fmask))
+
+#define ubh_get_addr16(ubh,begin) \
+ (((__fs16*)((ubh)->bh[(begin) >> (uspi->s_fshift-1)]->b_data)) + \
+ ((begin) & ((uspi->fsize>>1) - 1)))
+
+#define ubh_get_addr32(ubh,begin) \
+ (((__fs32*)((ubh)->bh[(begin) >> (uspi->s_fshift-2)]->b_data)) + \
+ ((begin) & ((uspi->s_fsize>>2) - 1)))
+
+#define ubh_get_addr64(ubh,begin) \
+ (((__fs64*)((ubh)->bh[(begin) >> (uspi->s_fshift-3)]->b_data)) + \
+ ((begin) & ((uspi->s_fsize>>3) - 1)))
+
+#define ubh_get_addr ubh_get_addr8
+
+static inline void *ubh_get_data_ptr(struct ufs_sb_private_info *uspi,
+ struct ufs_buffer_head *ubh,
+ u64 blk)
+{
+ if (uspi->fs_magic == UFS2_MAGIC)
+ return ubh_get_addr64(ubh, blk);
+ else
+ return ubh_get_addr32(ubh, blk);
+}
+
+#define ubh_blkmap(ubh,begin,bit) \
+ ((*ubh_get_addr(ubh, (begin) + ((bit) >> 3)) >> ((bit) & 7)) & (0xff >> (UFS_MAXFRAG - uspi->s_fpb)))
+
+/*
+ * Determine the number of available frags given a
+ * percentage to hold in reserve.
+ */
+static inline u64
+ufs_freespace(struct ufs_sb_private_info *uspi, int percentreserved)
+{
+ return ufs_blkstofrags(uspi->cs_total.cs_nbfree) +
+ uspi->cs_total.cs_nffree -
+ (uspi->s_dsize * (percentreserved) / 100);
+}
+
+/*
+ * Macros to access cylinder group array structures
+ */
+#define ubh_cg_blktot(ucpi,cylno) \
+ (*((__fs32*)ubh_get_addr(UCPI_UBH(ucpi), (ucpi)->c_btotoff + ((cylno) << 2))))
+
+#define ubh_cg_blks(ucpi,cylno,rpos) \
+ (*((__fs16*)ubh_get_addr(UCPI_UBH(ucpi), \
+ (ucpi)->c_boff + (((cylno) * uspi->s_nrpos + (rpos)) << 1 ))))
+
+/*
+ * Bitmap operations
+ * These functions work like classical bitmap operations.
+ * The difference is that we don't have the whole bitmap
+ * in one contiguous chunk of memory, but in several buffers.
+ * The parameters of each function are super_block, ufs_buffer_head and
+ * position of the beginning of the bitmap.
+ */
+#define ubh_setbit(ubh,begin,bit) \
+ (*ubh_get_addr(ubh, (begin) + ((bit) >> 3)) |= (1 << ((bit) & 7)))
+
+#define ubh_clrbit(ubh,begin,bit) \
+ (*ubh_get_addr (ubh, (begin) + ((bit) >> 3)) &= ~(1 << ((bit) & 7)))
+
+#define ubh_isset(ubh,begin,bit) \
+ (*ubh_get_addr (ubh, (begin) + ((bit) >> 3)) & (1 << ((bit) & 7)))
+
+#define ubh_isclr(ubh,begin,bit) (!ubh_isset(ubh,begin,bit))
+
+#define ubh_find_first_zero_bit(ubh,begin,size) _ubh_find_next_zero_bit_(uspi,ubh,begin,size,0)
+
+#define ubh_find_next_zero_bit(ubh,begin,size,offset) _ubh_find_next_zero_bit_(uspi,ubh,begin,size,offset)
+static inline unsigned _ubh_find_next_zero_bit_(
+ struct ufs_sb_private_info * uspi, struct ufs_buffer_head * ubh,
+ unsigned begin, unsigned size, unsigned offset)
+{
+ unsigned base, count, pos;
+
+ size -= offset;
+ begin <<= 3;
+ offset += begin;
+ base = offset >> uspi->s_bpfshift;
+ offset &= uspi->s_bpfmask;
+ for (;;) {
+ count = min_t(unsigned int, size + offset, uspi->s_bpf);
+ size -= count - offset;
+ pos = find_next_zero_bit_le(ubh->bh[base]->b_data, count, offset);
+ if (pos < count || !size)
+ break;
+ base++;
+ offset = 0;
+ }
+ return (base << uspi->s_bpfshift) + pos - begin;
+}
+
+static inline unsigned find_last_zero_bit (unsigned char * bitmap,
+ unsigned size, unsigned offset)
+{
+ unsigned bit, i;
+ unsigned char * mapp;
+ unsigned char map;
+
+ mapp = bitmap + (size >> 3);
+ map = *mapp--;
+ bit = 1 << (size & 7);
+ for (i = size; i > offset; i--) {
+ if ((map & bit) == 0)
+ break;
+ if ((i & 7) != 0) {
+ bit >>= 1;
+ } else {
+ map = *mapp--;
+ bit = 1 << 7;
+ }
+ }
+ return i;
+}
+
+#define ubh_find_last_zero_bit(ubh,begin,size,offset) _ubh_find_last_zero_bit_(uspi,ubh,begin,size,offset)
+static inline unsigned _ubh_find_last_zero_bit_(
+ struct ufs_sb_private_info * uspi, struct ufs_buffer_head * ubh,
+ unsigned begin, unsigned start, unsigned end)
+{
+ unsigned base, count, pos, size;
+
+ size = start - end;
+ begin <<= 3;
+ start += begin;
+ base = start >> uspi->s_bpfshift;
+ start &= uspi->s_bpfmask;
+ for (;;) {
+ count = min_t(unsigned int,
+ size + (uspi->s_bpf - start), uspi->s_bpf)
+ - (uspi->s_bpf - start);
+ size -= count;
+ pos = find_last_zero_bit (ubh->bh[base]->b_data,
+ start, start - count);
+ if (pos > start - count || !size)
+ break;
+ base--;
+ start = uspi->s_bpf;
+ }
+ return (base << uspi->s_bpfshift) + pos - begin;
+}
+
+#define ubh_isblockclear(ubh,begin,block) (!_ubh_isblockset_(uspi,ubh,begin,block))
+
+#define ubh_isblockset(ubh,begin,block) _ubh_isblockset_(uspi,ubh,begin,block)
+static inline int _ubh_isblockset_(struct ufs_sb_private_info * uspi,
+ struct ufs_buffer_head * ubh, unsigned begin, unsigned block)
+{
+ switch (uspi->s_fpb) {
+ case 8:
+ return (*ubh_get_addr (ubh, begin + block) == 0xff);
+ case 4:
+ return (*ubh_get_addr (ubh, begin + (block >> 1)) == (0x0f << ((block & 0x01) << 2)));
+ case 2:
+ return (*ubh_get_addr (ubh, begin + (block >> 2)) == (0x03 << ((block & 0x03) << 1)));
+ case 1:
+ return (*ubh_get_addr (ubh, begin + (block >> 3)) == (0x01 << (block & 0x07)));
+ }
+ return 0;
+}
+
+#define ubh_clrblock(ubh,begin,block) _ubh_clrblock_(uspi,ubh,begin,block)
+static inline void _ubh_clrblock_(struct ufs_sb_private_info * uspi,
+ struct ufs_buffer_head * ubh, unsigned begin, unsigned block)
+{
+ switch (uspi->s_fpb) {
+ case 8:
+ *ubh_get_addr (ubh, begin + block) = 0x00;
+ return;
+ case 4:
+ *ubh_get_addr (ubh, begin + (block >> 1)) &= ~(0x0f << ((block & 0x01) << 2));
+ return;
+ case 2:
+ *ubh_get_addr (ubh, begin + (block >> 2)) &= ~(0x03 << ((block & 0x03) << 1));
+ return;
+ case 1:
+ *ubh_get_addr (ubh, begin + (block >> 3)) &= ~(0x01 << ((block & 0x07)));
+ return;
+ }
+}
+
+#define ubh_setblock(ubh,begin,block) _ubh_setblock_(uspi,ubh,begin,block)
+static inline void _ubh_setblock_(struct ufs_sb_private_info * uspi,
+ struct ufs_buffer_head * ubh, unsigned begin, unsigned block)
+{
+ switch (uspi->s_fpb) {
+ case 8:
+ *ubh_get_addr(ubh, begin + block) = 0xff;
+ return;
+ case 4:
+ *ubh_get_addr(ubh, begin + (block >> 1)) |= (0x0f << ((block & 0x01) << 2));
+ return;
+ case 2:
+ *ubh_get_addr(ubh, begin + (block >> 2)) |= (0x03 << ((block & 0x03) << 1));
+ return;
+ case 1:
+ *ubh_get_addr(ubh, begin + (block >> 3)) |= (0x01 << ((block & 0x07)));
+ return;
+ }
+}
+
+static inline void ufs_fragacct (struct super_block * sb, unsigned blockmap,
+ __fs32 * fraglist, int cnt)
+{
+ struct ufs_sb_private_info * uspi;
+ unsigned fragsize, pos;
+
+ uspi = UFS_SB(sb)->s_uspi;
+
+ fragsize = 0;
+ for (pos = 0; pos < uspi->s_fpb; pos++) {
+ if (blockmap & (1 << pos)) {
+ fragsize++;
+ }
+ else if (fragsize > 0) {
+ fs32_add(sb, &fraglist[fragsize], cnt);
+ fragsize = 0;
+ }
+ }
+ if (fragsize > 0 && fragsize < uspi->s_fpb)
+ fs32_add(sb, &fraglist[fragsize], cnt);
+}
+
+static inline void *ufs_get_direct_data_ptr(struct ufs_sb_private_info *uspi,
+ struct ufs_inode_info *ufsi,
+ unsigned blk)
+{
+ BUG_ON(blk > UFS_TIND_BLOCK);
+ return uspi->fs_magic == UFS2_MAGIC ?
+ (void *)&ufsi->i_u1.u2_i_data[blk] :
+ (void *)&ufsi->i_u1.i_data[blk];
+}
+
+static inline u64 ufs_data_ptr_to_cpu(struct super_block *sb, void *p)
+{
+ return UFS_SB(sb)->s_uspi->fs_magic == UFS2_MAGIC ?
+ fs64_to_cpu(sb, *(__fs64 *)p) :
+ fs32_to_cpu(sb, *(__fs32 *)p);
+}
+
+static inline void ufs_cpu_to_data_ptr(struct super_block *sb, void *p, u64 val)
+{
+ if (UFS_SB(sb)->s_uspi->fs_magic == UFS2_MAGIC)
+ *(__fs64 *)p = cpu_to_fs64(sb, val);
+ else
+ *(__fs32 *)p = cpu_to_fs32(sb, val);
+}
+
+static inline void ufs_data_ptr_clear(struct ufs_sb_private_info *uspi,
+ void *p)
+{
+ if (uspi->fs_magic == UFS2_MAGIC)
+ *(__fs64 *)p = 0;
+ else
+ *(__fs32 *)p = 0;
+}
+
+static inline int ufs_is_data_ptr_zero(struct ufs_sb_private_info *uspi,
+ void *p)
+{
+ if (uspi->fs_magic == UFS2_MAGIC)
+ return *(__fs64 *)p == 0;
+ else
+ return *(__fs32 *)p == 0;
+}
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-04 07:15:02 +0000