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-rw-r--r--fs/ufs/Makefile2
-rw-r--r--fs/ufs/balloc.c8
-rw-r--r--fs/ufs/inode.c948
-rw-r--r--fs/ufs/super.c36
-rw-r--r--fs/ufs/truncate.c523
-rw-r--r--fs/ufs/ufs.h13
6 files changed, 646 insertions, 884 deletions
diff --git a/fs/ufs/Makefile b/fs/ufs/Makefile
index 4d0e02b02..392db25c0 100644
--- a/fs/ufs/Makefile
+++ b/fs/ufs/Makefile
@@ -5,5 +5,5 @@
obj-$(CONFIG_UFS_FS) += ufs.o
ufs-objs := balloc.o cylinder.o dir.o file.o ialloc.o inode.o \
- namei.o super.o symlink.o truncate.o util.o
+ namei.o super.o symlink.o util.o
ccflags-$(CONFIG_UFS_DEBUG) += -DDEBUG
diff --git a/fs/ufs/balloc.c b/fs/ufs/balloc.c
index a7106eda5..dc5fae601 100644
--- a/fs/ufs/balloc.c
+++ b/fs/ufs/balloc.c
@@ -417,12 +417,14 @@ u64 ufs_new_fragments(struct inode *inode, void *p, u64 fragment,
if (oldcount == 0) {
result = ufs_alloc_fragments (inode, cgno, goal, count, err);
if (result) {
+ ufs_clear_frags(inode, result + oldcount,
+ newcount - oldcount, locked_page != NULL);
+ write_seqlock(&UFS_I(inode)->meta_lock);
ufs_cpu_to_data_ptr(sb, p, result);
+ write_sequnlock(&UFS_I(inode)->meta_lock);
*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);
@@ -473,7 +475,9 @@ u64 ufs_new_fragments(struct inode *inode, void *p, u64 fragment,
ufs_change_blocknr(inode, fragment - oldcount, oldcount,
uspi->s_sbbase + tmp,
uspi->s_sbbase + result, locked_page);
+ write_seqlock(&UFS_I(inode)->meta_lock);
ufs_cpu_to_data_ptr(sb, p, result);
+ write_sequnlock(&UFS_I(inode)->meta_lock);
*err = 0;
UFS_I(inode)->i_lastfrag = max(UFS_I(inode)->i_lastfrag,
fragment + count);
diff --git a/fs/ufs/inode.c b/fs/ufs/inode.c
index f913a6924..a064cf44b 100644
--- a/fs/ufs/inode.c
+++ b/fs/ufs/inode.c
@@ -41,9 +41,7 @@
#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])
+static int ufs_block_to_path(struct inode *inode, sector_t i_block, unsigned offsets[4])
{
struct ufs_sb_private_info *uspi = UFS_SB(inode->i_sb)->s_uspi;
int ptrs = uspi->s_apb;
@@ -75,227 +73,232 @@ static int ufs_block_to_path(struct inode *inode, sector_t i_block, sector_t off
return n;
}
+typedef struct {
+ void *p;
+ union {
+ __fs32 key32;
+ __fs64 key64;
+ };
+ struct buffer_head *bh;
+} Indirect;
+
+static inline int grow_chain32(struct ufs_inode_info *ufsi,
+ struct buffer_head *bh, __fs32 *v,
+ Indirect *from, Indirect *to)
+{
+ Indirect *p;
+ unsigned seq;
+ to->bh = bh;
+ do {
+ seq = read_seqbegin(&ufsi->meta_lock);
+ to->key32 = *(__fs32 *)(to->p = v);
+ for (p = from; p <= to && p->key32 == *(__fs32 *)p->p; p++)
+ ;
+ } while (read_seqretry(&ufsi->meta_lock, seq));
+ return (p > to);
+}
+
+static inline int grow_chain64(struct ufs_inode_info *ufsi,
+ struct buffer_head *bh, __fs64 *v,
+ Indirect *from, Indirect *to)
+{
+ Indirect *p;
+ unsigned seq;
+ to->bh = bh;
+ do {
+ seq = read_seqbegin(&ufsi->meta_lock);
+ to->key64 = *(__fs64 *)(to->p = v);
+ for (p = from; p <= to && p->key64 == *(__fs64 *)p->p; p++)
+ ;
+ } while (read_seqretry(&ufsi->meta_lock, seq));
+ return (p > to);
+}
+
/*
* 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)
+static u64 ufs_frag_map(struct inode *inode, unsigned offsets[4], int depth)
{
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;
+ Indirect chain[4], *q = chain;
+ unsigned *p;
unsigned flags = UFS_SB(sb)->s_flags;
- u64 temp = 0L;
+ u64 res = 0;
- 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;
+ goto no_block;
+again:
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;
+ if (!grow_chain32(ufsi, NULL, &ufsi->i_u1.i_data[*p++], chain, q))
+ goto changed;
+ if (!q->key32)
+ goto no_block;
while (--depth) {
+ __fs32 *ptr;
struct buffer_head *bh;
- sector_t n = *p++;
+ unsigned n = *p++;
- bh = sb_bread(sb, uspi->s_sbbase + fs32_to_cpu(sb, block)+(n>>shift));
+ bh = sb_bread(sb, uspi->s_sbbase +
+ fs32_to_cpu(sb, q->key32) + (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;
+ goto no_block;
+ ptr = (__fs32 *)bh->b_data + (n & mask);
+ if (!grow_chain32(ufsi, bh, ptr, chain, ++q))
+ goto changed;
+ if (!q->key32)
+ goto no_block;
+ }
+ res = fs32_to_cpu(sb, q->key32);
+ goto found;
+ufs2:
+ if (!grow_chain64(ufsi, NULL, &ufsi->i_u1.u2_i_data[*p++], chain, q))
+ goto changed;
+ if (!q->key64)
+ goto no_block;
while (--depth) {
+ __fs64 *ptr;
struct buffer_head *bh;
- sector_t n = *p++;
-
+ unsigned n = *p++;
- temp = (u64)(uspi->s_sbbase) + fs64_to_cpu(sb, u2_block);
- bh = sb_bread(sb, temp +(u64) (n>>shift));
+ bh = sb_bread(sb, uspi->s_sbbase +
+ fs64_to_cpu(sb, q->key64) + (n>>shift));
if (!bh)
- goto out;
- u2_block = ((__fs64 *)bh->b_data)[n & mask];
- brelse(bh);
- if (!u2_block)
- goto out;
+ goto no_block;
+ ptr = (__fs64 *)bh->b_data + (n & mask);
+ if (!grow_chain64(ufsi, bh, ptr, chain, ++q))
+ goto changed;
+ if (!q->key64)
+ goto no_block;
}
- temp = (u64)uspi->s_sbbase + fs64_to_cpu(sb, u2_block);
- ret = temp + (u64) (frag & uspi->s_fpbmask);
+ res = fs64_to_cpu(sb, q->key64);
+found:
+ res += uspi->s_sbbase;
+no_block:
+ while (q > chain) {
+ brelse(q->bh);
+ q--;
+ }
+ return res;
-out:
- if (needs_lock)
- unlock_ufs(sb);
- return ret;
+changed:
+ while (q > chain) {
+ brelse(q->bh);
+ q--;
+ }
+ goto again;
+}
+
+/*
+ * Unpacking tails: we have a file with partial final block and
+ * we had been asked to extend it. If the fragment being written
+ * is within the same block, we need to extend the tail just to cover
+ * that fragment. Otherwise the tail is extended to full block.
+ *
+ * Note that we might need to create a _new_ tail, but that will
+ * be handled elsewhere; this is strictly for resizing old
+ * ones.
+ */
+static bool
+ufs_extend_tail(struct inode *inode, u64 writes_to,
+ int *err, 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;
+ unsigned lastfrag = ufsi->i_lastfrag; /* it's a short file, so unsigned is enough */
+ unsigned block = ufs_fragstoblks(lastfrag);
+ unsigned new_size;
+ void *p;
+ u64 tmp;
+
+ if (writes_to < (lastfrag | uspi->s_fpbmask))
+ new_size = (writes_to & uspi->s_fpbmask) + 1;
+ else
+ new_size = uspi->s_fpb;
+
+ p = ufs_get_direct_data_ptr(uspi, ufsi, block);
+ tmp = ufs_new_fragments(inode, p, lastfrag, ufs_data_ptr_to_cpu(sb, p),
+ new_size, err, locked_page);
+ return tmp != 0;
}
/**
* ufs_inode_getfrag() - allocate new fragment(s)
* @inode: pointer to inode
- * @fragment: number of `fragment' which hold pointer
- * to new allocated fragment(s)
+ * @index: number of block pointer within the inode's array.
* @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)
+static u64
+ufs_inode_getfrag(struct inode *inode, unsigned index,
+ sector_t new_fragment, int *err,
+ 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);
+ u64 tmp, goal, lastfrag;
+ unsigned nfrags = uspi->s_fpb;
+ void *p;
/* 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:
+ p = ufs_get_direct_data_ptr(uspi, ufsi, index);
tmp = ufs_data_ptr_to_cpu(sb, p);
+ if (tmp)
+ goto out;
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);
+ /* will that be a new tail? */
+ if (new_fragment < UFS_NDIR_FRAGMENT && new_fragment >= lastfrag)
+ nfrags = (new_fragment & uspi->s_fpbmask) + 1;
+
+ goal = 0;
+ if (index) {
+ goal = ufs_data_ptr_to_cpu(sb,
+ ufs_get_direct_data_ptr(uspi, ufsi, index - 1));
+ if (goal)
+ goal += uspi->s_fpb;
}
+ tmp = ufs_new_fragments(inode, p, ufs_blknum(new_fragment),
+ goal, uspi->s_fpb, err, locked_page);
+
if (!tmp) {
- if ((!blockoff && ufs_data_ptr_to_cpu(sb, p)) ||
- (blockoff && lastfrag != ufsi->i_lastfrag))
- goto repeat;
*err = -ENOSPC;
- return NULL;
+ return 0;
}
- if (!phys) {
- result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff);
- } else {
- *phys = uspi->s_sbbase + tmp + blockoff;
- result = NULL;
- *err = 0;
+ if (new)
*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;
+out:
+ return tmp + uspi->s_sbbase;
/* This part : To be implemented ....
Required only for writing, not required for READ-ONLY.
@@ -316,95 +319,70 @@ repeat2:
/**
* 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
+ * @ind_block: block number of the indirect block
+ * @index: number of pointer within the indirect 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)
+static u64
+ufs_inode_getblock(struct inode *inode, u64 ind_block,
+ unsigned index, sector_t new_fragment, int *err,
+ 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;
+ int shift = uspi->s_apbshift - uspi->s_fpbshift;
+ u64 tmp = 0, goal;
+ struct buffer_head *bh;
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);
+ if (!ind_block)
+ return 0;
- 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;
+ bh = sb_bread(sb, ind_block + (index >> shift));
+ if (unlikely(!bh)) {
+ *err = -EIO;
+ return 0;
}
+
+ index &= uspi->s_apbmask >> uspi->s_fpbshift;
if (uspi->fs_magic == UFS2_MAGIC)
- p = (__fs64 *)bh->b_data + block;
+ p = (__fs64 *)bh->b_data + index;
else
- p = (__fs32 *)bh->b_data + block;
-repeat:
+ p = (__fs32 *)bh->b_data + index;
+
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 (tmp)
+ 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]))))
+ if (index && (uspi->fs_magic == UFS2_MAGIC ?
+ (tmp = fs64_to_cpu(sb, ((__fs64 *)bh->b_data)[index-1])) :
+ (tmp = fs32_to_cpu(sb, ((__fs32 *)bh->b_data)[index-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;
+ if (!tmp)
goto out;
- }
-
- if (!phys) {
- result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff);
- } else {
- *phys = uspi->s_sbbase + tmp + blockoff;
+ if (new)
*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;
+ if (tmp)
+ tmp += uspi->s_sbbase;
+ return tmp;
}
/**
@@ -412,103 +390,64 @@ out:
* readpage, writepage and so on
*/
-int ufs_getfrag_block(struct inode *inode, sector_t fragment, struct buffer_head *bh_result, int create)
+static 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;
+ struct super_block *sb = inode->i_sb;
+ struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
+ int err = 0, new = 0;
+ unsigned offsets[4];
+ int depth = ufs_block_to_path(inode, fragment >> uspi->s_fpbshift, offsets);
u64 phys64 = 0;
- bool needs_lock = (sbi->mutex_owner != current);
-
+ unsigned frag = fragment & uspi->s_fpbmask;
+
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;
+ phys64 = ufs_frag_map(inode, offsets, depth);
+ goto out;
}
/* This code entered only while writing ....? */
- err = -EIO;
- new = 0;
- ret = 0;
- bh = NULL;
-
- if (needs_lock)
- lock_ufs(sb);
+ mutex_lock(&UFS_I(inode)->truncate_mutex);
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);
+ if (unlikely(!depth)) {
+ ufs_warning(sb, "ufs_get_block", "block > big");
+ err = -EIO;
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);
+ if (UFS_I(inode)->i_lastfrag < UFS_NDIR_FRAGMENT) {
+ unsigned lastfrag = UFS_I(inode)->i_lastfrag;
+ unsigned tailfrags = lastfrag & uspi->s_fpbmask;
+ if (tailfrags && fragment >= lastfrag) {
+ if (!ufs_extend_tail(inode, fragment,
+ &err, bh_result->b_page))
+ goto out;
+ }
+ }
+ if (depth == 1) {
+ phys64 = ufs_inode_getfrag(inode, offsets[0], fragment,
+ &err, &new, bh_result->b_page);
+ } else {
+ int i;
+ phys64 = ufs_inode_getfrag(inode, offsets[0], fragment,
+ &err, NULL, NULL);
+ for (i = 1; i < depth - 1; i++)
+ phys64 = ufs_inode_getblock(inode, phys64, offsets[i],
+ fragment, &err, NULL, NULL);
+ phys64 = ufs_inode_getblock(inode, phys64, offsets[depth - 1],
+ fragment, &err, &new, bh_result->b_page);
+ }
+out:
+ if (phys64) {
+ phys64 += frag;
+ map_bh(bh_result, sb, phys64);
+ if (new)
+ set_buffer_new(bh_result);
+ }
+ mutex_unlock(&UFS_I(inode)->truncate_mutex);
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)
@@ -526,12 +465,16 @@ 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_truncate_blocks(struct inode *);
+
static void ufs_write_failed(struct address_space *mapping, loff_t to)
{
struct inode *inode = mapping->host;
- if (to > inode->i_size)
+ if (to > inode->i_size) {
truncate_pagecache(inode, inode->i_size);
+ ufs_truncate_blocks(inode);
+ }
}
static int ufs_write_begin(struct file *file, struct address_space *mapping,
@@ -548,6 +491,18 @@ static int ufs_write_begin(struct file *file, struct address_space *mapping,
return ret;
}
+static int ufs_write_end(struct file *file, struct address_space *mapping,
+ loff_t pos, unsigned len, unsigned copied,
+ struct page *page, void *fsdata)
+{
+ int ret;
+
+ ret = generic_write_end(file, mapping, pos, len, copied, page, fsdata);
+ if (ret < len)
+ 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);
@@ -557,7 +512,7 @@ const struct address_space_operations ufs_aops = {
.readpage = ufs_readpage,
.writepage = ufs_writepage,
.write_begin = ufs_write_begin,
- .write_end = generic_write_end,
+ .write_end = ufs_write_end,
.bmap = ufs_bmap
};
@@ -599,7 +554,7 @@ static int ufs1_read_inode(struct inode *inode, struct ufs_inode *ufs_inode)
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.
*/
@@ -619,7 +574,7 @@ static int ufs1_read_inode(struct inode *inode, struct ufs_inode *ufs_inode)
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));
@@ -753,7 +708,7 @@ static void ufs1_update_inode(struct inode *inode, struct ufs_inode *ufs_inode)
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;
@@ -855,23 +810,19 @@ static int ufs_update_inode(struct inode * inode, int do_sync)
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;
+ return ufs_update_inode(inode, wbc->sync_mode == WB_SYNC_ALL);
}
int ufs_sync_inode (struct inode *inode)
@@ -888,24 +839,389 @@ void ufs_evict_inode(struct inode * inode)
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);
+ if (inode->i_blocks)
+ ufs_truncate_blocks(inode);
}
invalidate_inode_buffers(inode);
clear_inode(inode);
- if (want_delete) {
- lock_ufs(inode->i_sb);
+ if (want_delete)
ufs_free_inode(inode);
- unlock_ufs(inode->i_sb);
+}
+
+struct to_free {
+ struct inode *inode;
+ u64 to;
+ unsigned count;
+};
+
+static inline void free_data(struct to_free *ctx, u64 from, unsigned count)
+{
+ if (ctx->count && ctx->to != from) {
+ ufs_free_blocks(ctx->inode, ctx->to - ctx->count, ctx->count);
+ ctx->count = 0;
+ }
+ ctx->count += count;
+ ctx->to = from + count;
+}
+
+#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 void 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;
+ struct to_free ctx = {.inode = inode};
+ unsigned i, tmp;
+
+ UFSD("ENTER: ino %lu\n", inode->i_ino);
+
+ sb = inode->i_sb;
+ uspi = UFS_SB(sb)->s_uspi;
+
+ 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);
+
+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;
+ write_seqlock(&ufsi->meta_lock);
+ ufs_data_ptr_clear(uspi, p);
+ write_sequnlock(&ufsi->meta_lock);
+
+ free_data(&ctx, tmp, uspi->s_fpb);
+ }
+
+ free_data(&ctx, 0, 0);
+
+ 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);
+ write_seqlock(&ufsi->meta_lock);
+ ufs_data_ptr_clear(uspi, p);
+ write_sequnlock(&ufsi->meta_lock);
+
+ ufs_free_fragments (inode, tmp, frag4);
+ next3:
+
+ UFSD("EXIT: ino %lu\n", inode->i_ino);
+}
+
+static void free_full_branch(struct inode *inode, u64 ind_block, int depth)
+{
+ struct super_block *sb = inode->i_sb;
+ struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
+ struct ufs_buffer_head *ubh = ubh_bread(sb, ind_block, uspi->s_bsize);
+ unsigned i;
+
+ if (!ubh)
+ return;
+
+ if (--depth) {
+ for (i = 0; i < uspi->s_apb; i++) {
+ void *p = ubh_get_data_ptr(uspi, ubh, i);
+ u64 block = ufs_data_ptr_to_cpu(sb, p);
+ if (block)
+ free_full_branch(inode, block, depth);
+ }
+ } else {
+ struct to_free ctx = {.inode = inode};
+
+ for (i = 0; i < uspi->s_apb; i++) {
+ void *p = ubh_get_data_ptr(uspi, ubh, i);
+ u64 block = ufs_data_ptr_to_cpu(sb, p);
+ if (block)
+ free_data(&ctx, block, uspi->s_fpb);
+ }
+ free_data(&ctx, 0, 0);
+ }
+
+ ubh_bforget(ubh);
+ ufs_free_blocks(inode, ind_block, uspi->s_fpb);
+}
+
+static void free_branch_tail(struct inode *inode, unsigned from, struct ufs_buffer_head *ubh, int depth)
+{
+ struct super_block *sb = inode->i_sb;
+ struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
+ unsigned i;
+
+ if (--depth) {
+ for (i = from; i < uspi->s_apb ; i++) {
+ void *p = ubh_get_data_ptr(uspi, ubh, i);
+ u64 block = ufs_data_ptr_to_cpu(sb, p);
+ if (block) {
+ write_seqlock(&UFS_I(inode)->meta_lock);
+ ufs_data_ptr_clear(uspi, p);
+ write_sequnlock(&UFS_I(inode)->meta_lock);
+ ubh_mark_buffer_dirty(ubh);
+ free_full_branch(inode, block, depth);
+ }
+ }
+ } else {
+ struct to_free ctx = {.inode = inode};
+
+ for (i = from; i < uspi->s_apb; i++) {
+ void *p = ubh_get_data_ptr(uspi, ubh, i);
+ u64 block = ufs_data_ptr_to_cpu(sb, p);
+ if (block) {
+ write_seqlock(&UFS_I(inode)->meta_lock);
+ ufs_data_ptr_clear(uspi, p);
+ write_sequnlock(&UFS_I(inode)->meta_lock);
+ ubh_mark_buffer_dirty(ubh);
+ free_data(&ctx, block, uspi->s_fpb);
+ }
+ }
+ free_data(&ctx, 0, 0);
+ }
+ if (IS_SYNC(inode) && ubh_buffer_dirty(ubh))
+ ubh_sync_block(ubh);
+ ubh_brelse(ubh);
+}
+
+static int ufs_alloc_lastblock(struct inode *inode, loff_t size)
+{
+ 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 = (size + 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;
+}
+
+static void __ufs_truncate_blocks(struct inode *inode)
+{
+ 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;
+ unsigned offsets[4];
+ int depth = ufs_block_to_path(inode, DIRECT_BLOCK, offsets);
+ int depth2;
+ unsigned i;
+ struct ufs_buffer_head *ubh[3];
+ void *p;
+ u64 block;
+
+ if (!depth)
+ return;
+
+ /* find the last non-zero in offsets[] */
+ for (depth2 = depth - 1; depth2; depth2--)
+ if (offsets[depth2])
+ break;
+
+ mutex_lock(&ufsi->truncate_mutex);
+ if (depth == 1) {
+ ufs_trunc_direct(inode);
+ offsets[0] = UFS_IND_BLOCK;
+ } else {
+ /* get the blocks that should be partially emptied */
+ p = ufs_get_direct_data_ptr(uspi, ufsi, offsets[0]);
+ for (i = 0; i < depth2; i++) {
+ offsets[i]++; /* next branch is fully freed */
+ block = ufs_data_ptr_to_cpu(sb, p);
+ if (!block)
+ break;
+ ubh[i] = ubh_bread(sb, block, uspi->s_bsize);
+ if (!ubh[i]) {
+ write_seqlock(&ufsi->meta_lock);
+ ufs_data_ptr_clear(uspi, p);
+ write_sequnlock(&ufsi->meta_lock);
+ break;
+ }
+ p = ubh_get_data_ptr(uspi, ubh[i], offsets[i + 1]);
+ }
+ while (i--)
+ free_branch_tail(inode, offsets[i + 1], ubh[i], depth - i - 1);
+ }
+ for (i = offsets[0]; i <= UFS_TIND_BLOCK; i++) {
+ p = ufs_get_direct_data_ptr(uspi, ufsi, i);
+ block = ufs_data_ptr_to_cpu(sb, p);
+ if (block) {
+ write_seqlock(&ufsi->meta_lock);
+ ufs_data_ptr_clear(uspi, p);
+ write_sequnlock(&ufsi->meta_lock);
+ free_full_branch(inode, block, i - UFS_IND_BLOCK + 1);
+ }
}
+ ufsi->i_lastfrag = DIRECT_FRAGMENT;
+ mark_inode_dirty(inode);
+ mutex_unlock(&ufsi->truncate_mutex);
+}
+
+static int ufs_truncate(struct inode *inode, loff_t size)
+{
+ int err = 0;
+
+ UFSD("ENTER: ino %lu, i_size: %llu, old_i_size: %llu\n",
+ inode->i_ino, (unsigned long long)size,
+ (unsigned long long)i_size_read(inode));
+
+ 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, size);
+
+ if (err)
+ goto out;
+
+ block_truncate_page(inode->i_mapping, size, ufs_getfrag_block);
+
+ truncate_setsize(inode, size);
+
+ __ufs_truncate_blocks(inode);
+ inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC;
+ mark_inode_dirty(inode);
+out:
+ UFSD("EXIT: err %d\n", err);
+ return err;
+}
+
+void ufs_truncate_blocks(struct inode *inode)
+{
+ if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
+ S_ISLNK(inode->i_mode)))
+ return;
+ if (IS_APPEND(inode) || IS_IMMUTABLE(inode))
+ return;
+ __ufs_truncate_blocks(inode);
+}
+
+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) {
+ error = ufs_truncate(inode, attr->ia_size);
+ 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/super.c b/fs/ufs/super.c
index 250579a80..f6390eec0 100644
--- a/fs/ufs/super.c
+++ b/fs/ufs/super.c
@@ -94,22 +94,6 @@
#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;
@@ -694,7 +678,6 @@ static int ufs_sync_fs(struct super_block *sb, int wait)
struct ufs_super_block_third * usb3;
unsigned flags;
- lock_ufs(sb);
mutex_lock(&UFS_SB(sb)->s_lock);
UFSD("ENTER\n");
@@ -714,7 +697,6 @@ static int ufs_sync_fs(struct super_block *sb, int wait)
UFSD("EXIT\n");
mutex_unlock(&UFS_SB(sb)->s_lock);
- unlock_ufs(sb);
return 0;
}
@@ -758,7 +740,6 @@ static void ufs_put_super(struct super_block *sb)
ubh_brelse_uspi (sbi->s_uspi);
kfree (sbi->s_uspi);
- mutex_destroy(&sbi->mutex);
kfree (sbi);
sb->s_fs_info = NULL;
UFSD("EXIT\n");
@@ -801,7 +782,6 @@ static int ufs_fill_super(struct super_block *sb, void *data, int silent)
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);
@@ -1257,7 +1237,6 @@ magic_found:
return 0;
failed:
- mutex_destroy(&sbi->mutex);
if (ubh)
ubh_brelse_uspi (uspi);
kfree (uspi);
@@ -1280,7 +1259,6 @@ static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
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;
@@ -1296,7 +1274,6 @@ static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
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)) {
@@ -1304,14 +1281,12 @@ static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
} 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;
}
@@ -1335,7 +1310,6 @@ static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
#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 &&
@@ -1345,13 +1319,11 @@ static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
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;
@@ -1359,7 +1331,6 @@ static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
}
UFS_SB(sb)->s_mount_opt = new_mount_opt;
mutex_unlock(&UFS_SB(sb)->s_lock);
- unlock_ufs(sb);
return 0;
}
@@ -1391,8 +1362,7 @@ static int ufs_statfs(struct dentry *dentry, struct kstatfs *buf)
struct ufs_super_block_third *usb3;
u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
- lock_ufs(sb);
-
+ mutex_lock(&UFS_SB(sb)->s_lock);
usb3 = ubh_get_usb_third(uspi);
if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
@@ -1413,7 +1383,7 @@ static int ufs_statfs(struct dentry *dentry, struct kstatfs *buf)
buf->f_fsid.val[0] = (u32)id;
buf->f_fsid.val[1] = (u32)(id >> 32);
- unlock_ufs(sb);
+ mutex_unlock(&UFS_SB(sb)->s_lock);
return 0;
}
@@ -1429,6 +1399,8 @@ static struct inode *ufs_alloc_inode(struct super_block *sb)
return NULL;
ei->vfs_inode.i_version = 1;
+ seqlock_init(&ei->meta_lock);
+ mutex_init(&ei->truncate_mutex);
return &ei->vfs_inode;
}
diff --git a/fs/ufs/truncate.c b/fs/ufs/truncate.c
deleted file mode 100644
index 21154704c..000000000
--- a/fs/ufs/truncate.c
+++ /dev/null
@@ -1,523 +0,0 @@
-/*
- * 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
index 2e31ea2e3..7da4aca86 100644
--- a/fs/ufs/ufs.h
+++ b/fs/ufs/ufs.h
@@ -24,8 +24,6 @@ struct ufs_sb_info {
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 */
@@ -46,6 +44,8 @@ struct ufs_inode_info {
__u32 i_oeftflag;
__u16 i_osync;
__u64 i_lastfrag;
+ seqlock_t meta_lock;
+ struct mutex truncate_mutex;
__u32 i_dir_start_lookup;
struct inode vfs_inode;
};
@@ -122,7 +122,7 @@ 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);
+extern int ufs_setattr(struct dentry *dentry, struct iattr *attr);
/* namei.c */
extern const struct file_operations ufs_dir_operations;
@@ -140,10 +140,6 @@ void ufs_mark_sb_dirty(struct super_block *sb);
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;
@@ -170,7 +166,4 @@ 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 */
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-05 14:19:05 +0000