Initial import

1 files changed, 910 insertions, 0 deletions

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);
+	}
+}