#include "xattr.h"
#include "acl.h"
+#include <trace/events/ext4.h>
/*
* define how far ahead to read directories while searching them.
*/
static int ext4_dx_add_entry(handle_t *handle, struct dentry *dentry,
struct inode *inode);
-unsigned int ext4_rec_len_from_disk(__le16 dlen, unsigned blocksize)
-{
- unsigned len = le16_to_cpu(dlen);
-
- if (len == EXT4_MAX_REC_LEN || len == 0)
- return blocksize;
- return (len & 65532) | ((len & 3) << 16);
-}
-
-__le16 ext4_rec_len_to_disk(unsigned len, unsigned blocksize)
-{
- if ((len > blocksize) || (blocksize > (1 << 18)) || (len & 3))
- BUG();
- if (len < 65536)
- return cpu_to_le16(len);
- if (len == blocksize) {
- if (blocksize == 65536)
- return cpu_to_le16(EXT4_MAX_REC_LEN);
- else
- return cpu_to_le16(0);
- }
- return cpu_to_le16((len & 65532) | ((len >> 16) & 3));
-}
-
/*
* p is at least 6 bytes before the end of page
*/
brelse(bh);
}
if (bcount)
- printk(KERN_DEBUG "%snames %u, fullness %u (%u%%)\n",
+ printk(KERN_DEBUG "%snames %u, fullness %u (%u%%)\n",
levels ? "" : " ", names, space/bcount,
(space/bcount)*100/blocksize);
return (struct stats) { names, space, bcount};
dir->i_sb->s_blocksize -
EXT4_DIR_REC_LEN(0));
for (; de < top; de = ext4_next_entry(de, dir->i_sb->s_blocksize)) {
- if (!ext4_check_dir_entry("htree_dirblock_to_tree", dir, de, bh,
- (block<<EXT4_BLOCK_SIZE_BITS(dir->i_sb))
- +((char *)de - bh->b_data))) {
+ if (ext4_check_dir_entry(dir, NULL, de, bh,
+ (block<<EXT4_BLOCK_SIZE_BITS(dir->i_sb))
+ + ((char *)de - bh->b_data))) {
/* On error, skip the f_pos to the next block. */
dir_file->f_pos = (dir_file->f_pos |
(dir->i_sb->s_blocksize - 1)) + 1;
int ret, err;
__u32 hashval;
- dxtrace(printk(KERN_DEBUG "In htree_fill_tree, start hash: %x:%x\n",
+ dxtrace(printk(KERN_DEBUG "In htree_fill_tree, start hash: %x:%x\n",
start_hash, start_minor_hash));
dir = dir_file->f_path.dentry->d_inode;
- if (!(EXT4_I(dir)->i_flags & EXT4_INDEX_FL)) {
+ if (!(ext4_test_inode_flag(dir, EXT4_INODE_INDEX))) {
hinfo.hash_version = EXT4_SB(dir->i_sb)->s_def_hash_version;
if (hinfo.hash_version <= DX_HASH_TEA)
hinfo.hash_version +=
{
if (!EXT4_HAS_COMPAT_FEATURE(inode->i_sb,
EXT4_FEATURE_COMPAT_DIR_INDEX))
- EXT4_I(inode)->i_flags &= ~EXT4_INDEX_FL;
+ ext4_clear_inode_flag(inode, EXT4_INODE_INDEX);
}
/*
if ((char *) de + namelen <= dlimit &&
ext4_match (namelen, name, de)) {
/* found a match - just to be sure, do a full check */
- if (!ext4_check_dir_entry("ext4_find_entry",
- dir, de, bh, offset))
+ if (ext4_check_dir_entry(dir, NULL, de, bh, offset))
return -1;
*res_dir = de;
return 1;
struct buffer_head *bh_use[NAMEI_RA_SIZE];
struct buffer_head *bh, *ret = NULL;
ext4_lblk_t start, block, b;
+ const u8 *name = d_name->name;
int ra_max = 0; /* Number of bh's in the readahead
buffer, bh_use[] */
int ra_ptr = 0; /* Current index into readahead
namelen = d_name->len;
if (namelen > EXT4_NAME_LEN)
return NULL;
+ if ((namelen <= 2) && (name[0] == '.') &&
+ (name[1] == '.' || name[1] == '\0')) {
+ /*
+ * "." or ".." will only be in the first block
+ * NFS may look up ".."; "." should be handled by the VFS
+ */
+ block = start = 0;
+ nblocks = 1;
+ goto restart;
+ }
if (is_dx(dir)) {
bh = ext4_dx_find_entry(dir, d_name, res_dir, &err);
/*
wait_on_buffer(bh);
if (!buffer_uptodate(bh)) {
/* read error, skip block & hope for the best */
- ext4_error(sb, "reading directory #%lu offset %lu",
- dir->i_ino, (unsigned long)block);
+ EXT4_ERROR_INODE(dir, "reading directory lblock %lu",
+ (unsigned long) block);
brelse(bh);
goto next;
}
static struct buffer_head * ext4_dx_find_entry(struct inode *dir, const struct qstr *d_name,
struct ext4_dir_entry_2 **res_dir, int *err)
{
- struct super_block * sb;
+ struct super_block * sb = dir->i_sb;
struct dx_hash_info hinfo;
- u32 hash;
struct dx_frame frames[2], *frame;
- struct ext4_dir_entry_2 *de, *top;
struct buffer_head *bh;
ext4_lblk_t block;
int retval;
- int namelen = d_name->len;
- const u8 *name = d_name->name;
- sb = dir->i_sb;
- /* NFS may look up ".." - look at dx_root directory block */
- if (namelen > 2 || name[0] != '.'||(name[1] != '.' && name[1] != '\0')){
- if (!(frame = dx_probe(d_name, dir, &hinfo, frames, err)))
- return NULL;
- } else {
- frame = frames;
- frame->bh = NULL; /* for dx_release() */
- frame->at = (struct dx_entry *)frames; /* hack for zero entry*/
- dx_set_block(frame->at, 0); /* dx_root block is 0 */
- }
- hash = hinfo.hash;
+ if (!(frame = dx_probe(d_name, dir, &hinfo, frames, err)))
+ return NULL;
do {
block = dx_get_block(frame->at);
- if (!(bh = ext4_bread (NULL,dir, block, 0, err)))
+ if (!(bh = ext4_bread(NULL, dir, block, 0, err)))
goto errout;
- de = (struct ext4_dir_entry_2 *) bh->b_data;
- top = (struct ext4_dir_entry_2 *) ((char *) de + sb->s_blocksize -
- EXT4_DIR_REC_LEN(0));
- for (; de < top; de = ext4_next_entry(de, sb->s_blocksize)) {
- int off = (block << EXT4_BLOCK_SIZE_BITS(sb))
- + ((char *) de - bh->b_data);
-
- if (!ext4_check_dir_entry(__func__, dir, de, bh, off)) {
- brelse(bh);
- *err = ERR_BAD_DX_DIR;
- goto errout;
- }
- if (ext4_match(namelen, name, de)) {
- *res_dir = de;
- dx_release(frames);
- return bh;
- }
+ retval = search_dirblock(bh, dir, d_name,
+ block << EXT4_BLOCK_SIZE_BITS(sb),
+ res_dir);
+ if (retval == 1) { /* Success! */
+ dx_release(frames);
+ return bh;
}
brelse(bh);
+ if (retval == -1) {
+ *err = ERR_BAD_DX_DIR;
+ goto errout;
+ }
+
/* Check to see if we should continue to search */
- retval = ext4_htree_next_block(dir, hash, frame,
+ retval = ext4_htree_next_block(dir, hinfo.hash, frame,
frames, NULL);
if (retval < 0) {
ext4_warning(sb,
__u32 ino = le32_to_cpu(de->inode);
brelse(bh);
if (!ext4_valid_inum(dir->i_sb, ino)) {
- ext4_error(dir->i_sb, "bad inode number: %u", ino);
+ EXT4_ERROR_INODE(dir, "bad inode number: %u", ino);
return ERR_PTR(-EIO);
}
inode = ext4_iget(dir->i_sb, ino);
- if (unlikely(IS_ERR(inode))) {
+ if (IS_ERR(inode)) {
if (PTR_ERR(inode) == -ESTALE) {
- ext4_error(dir->i_sb,
- "deleted inode referenced: %u",
- ino);
+ EXT4_ERROR_INODE(dir,
+ "deleted inode referenced: %u",
+ ino);
return ERR_PTR(-EIO);
} else {
return ERR_CAST(inode);
struct dentry *ext4_get_parent(struct dentry *child)
{
__u32 ino;
- struct inode *inode;
static const struct qstr dotdot = {
.name = "..",
.len = 2,
struct buffer_head *bh;
bh = ext4_find_entry(child->d_inode, &dotdot, &de);
- inode = NULL;
if (!bh)
return ERR_PTR(-ENOENT);
ino = le32_to_cpu(de->inode);
brelse(bh);
if (!ext4_valid_inum(child->d_inode->i_sb, ino)) {
- ext4_error(child->d_inode->i_sb,
- "bad inode number: %u", ino);
+ EXT4_ERROR_INODE(child->d_inode,
+ "bad parent inode number: %u", ino);
return ERR_PTR(-EIO);
}
unsigned rec_len = 0;
while (count--) {
- struct ext4_dir_entry_2 *de = (struct ext4_dir_entry_2 *)
+ struct ext4_dir_entry_2 *de = (struct ext4_dir_entry_2 *)
(from + (map->offs<<2));
rec_len = EXT4_DIR_REC_LEN(de->name_len);
memcpy (to, de, rec_len);
de = (struct ext4_dir_entry_2 *)bh->b_data;
top = bh->b_data + blocksize - reclen;
while ((char *) de <= top) {
- if (!ext4_check_dir_entry("ext4_add_entry", dir, de,
- bh, offset))
+ if (ext4_check_dir_entry(dir, NULL, de, bh, offset))
return -EIO;
if (ext4_match(namelen, name, de))
return -EEXIST;
de = (struct ext4_dir_entry_2 *)((char *)fde +
ext4_rec_len_from_disk(fde->rec_len, blocksize));
if ((char *) de >= (((char *) root) + blocksize)) {
- ext4_error(dir->i_sb,
- "invalid rec_len for '..' in inode %lu",
- dir->i_ino);
+ EXT4_ERROR_INODE(dir, "invalid rec_len for '..'");
brelse(bh);
return -EIO;
}
brelse(bh);
return retval;
}
- EXT4_I(dir)->i_flags |= EXT4_INDEX_FL;
+ ext4_set_inode_flag(dir, EXT4_INODE_INDEX);
data1 = bh2->b_data;
memcpy (data1, de, len);
retval = ext4_dx_add_entry(handle, dentry, inode);
if (!retval || (retval != ERR_BAD_DX_DIR))
return retval;
- EXT4_I(dir)->i_flags &= ~EXT4_INDEX_FL;
+ ext4_clear_inode_flag(dir, EXT4_INODE_INDEX);
dx_fallback++;
ext4_mark_inode_dirty(handle, dir);
}
de->rec_len = ext4_rec_len_to_disk(blocksize, blocksize);
retval = add_dirent_to_buf(handle, dentry, inode, de, bh);
brelse(bh);
+ if (retval == 0)
+ ext4_set_inode_state(inode, EXT4_STATE_NEWENTRY);
return retval;
}
if (err)
goto journal_error;
}
- ext4_handle_dirty_metadata(handle, inode, frames[0].bh);
+ err = ext4_handle_dirty_metadata(handle, inode, frames[0].bh);
+ if (err) {
+ ext4_std_error(inode->i_sb, err);
+ goto cleanup;
+ }
}
de = do_split(handle, dir, &bh, frame, &hinfo, &err);
if (!de)
{
struct ext4_dir_entry_2 *de, *pde;
unsigned int blocksize = dir->i_sb->s_blocksize;
- int i;
+ int i, err;
i = 0;
pde = NULL;
de = (struct ext4_dir_entry_2 *) bh->b_data;
while (i < bh->b_size) {
- if (!ext4_check_dir_entry("ext4_delete_entry", dir, de, bh, i))
+ if (ext4_check_dir_entry(dir, NULL, de, bh, i))
return -EIO;
if (de == de_del) {
BUFFER_TRACE(bh, "get_write_access");
- ext4_journal_get_write_access(handle, bh);
+ err = ext4_journal_get_write_access(handle, bh);
+ if (unlikely(err)) {
+ ext4_std_error(dir->i_sb, err);
+ return err;
+ }
if (pde)
pde->rec_len = ext4_rec_len_to_disk(
ext4_rec_len_from_disk(pde->rec_len,
de->inode = 0;
dir->i_version++;
BUFFER_TRACE(bh, "call ext4_handle_dirty_metadata");
- ext4_handle_dirty_metadata(handle, dir, bh);
+ err = ext4_handle_dirty_metadata(handle, dir, bh);
+ if (unlikely(err)) {
+ ext4_std_error(dir->i_sb, err);
+ return err;
+ }
return 0;
}
i += ext4_rec_len_from_disk(de->rec_len, blocksize);
struct inode *inode;
int err, retries = 0;
+ dquot_initialize(dir);
+
retry:
handle = ext4_journal_start(dir, EXT4_DATA_TRANS_BLOCKS(dir->i_sb) +
EXT4_INDEX_EXTRA_TRANS_BLOCKS + 3 +
if (!new_valid_dev(rdev))
return -EINVAL;
+ dquot_initialize(dir);
+
retry:
handle = ext4_journal_start(dir, EXT4_DATA_TRANS_BLOCKS(dir->i_sb) +
EXT4_INDEX_EXTRA_TRANS_BLOCKS + 3 +
{
handle_t *handle;
struct inode *inode;
- struct buffer_head *dir_block;
+ struct buffer_head *dir_block = NULL;
struct ext4_dir_entry_2 *de;
unsigned int blocksize = dir->i_sb->s_blocksize;
int err, retries = 0;
if (EXT4_DIR_LINK_MAX(dir))
return -EMLINK;
+ dquot_initialize(dir);
+
retry:
handle = ext4_journal_start(dir, EXT4_DATA_TRANS_BLOCKS(dir->i_sb) +
EXT4_INDEX_EXTRA_TRANS_BLOCKS + 3 +
if (!dir_block)
goto out_clear_inode;
BUFFER_TRACE(dir_block, "get_write_access");
- ext4_journal_get_write_access(handle, dir_block);
+ err = ext4_journal_get_write_access(handle, dir_block);
+ if (err)
+ goto out_clear_inode;
de = (struct ext4_dir_entry_2 *) dir_block->b_data;
de->inode = cpu_to_le32(inode->i_ino);
de->name_len = 1;
ext4_set_de_type(dir->i_sb, de, S_IFDIR);
inode->i_nlink = 2;
BUFFER_TRACE(dir_block, "call ext4_handle_dirty_metadata");
- ext4_handle_dirty_metadata(handle, dir, dir_block);
- brelse(dir_block);
- ext4_mark_inode_dirty(handle, inode);
- err = ext4_add_entry(handle, dentry, inode);
+ err = ext4_handle_dirty_metadata(handle, dir, dir_block);
+ if (err)
+ goto out_clear_inode;
+ err = ext4_mark_inode_dirty(handle, inode);
+ if (!err)
+ err = ext4_add_entry(handle, dentry, inode);
if (err) {
out_clear_inode:
clear_nlink(inode);
}
ext4_inc_count(handle, dir);
ext4_update_dx_flag(dir);
- ext4_mark_inode_dirty(handle, dir);
+ err = ext4_mark_inode_dirty(handle, dir);
+ if (err)
+ goto out_clear_inode;
d_instantiate(dentry, inode);
unlock_new_inode(inode);
out_stop:
+ brelse(dir_block);
ext4_journal_stop(handle);
if (err == -ENOSPC && ext4_should_retry_alloc(dir->i_sb, &retries))
goto retry;
if (inode->i_size < EXT4_DIR_REC_LEN(1) + EXT4_DIR_REC_LEN(2) ||
!(bh = ext4_bread(NULL, inode, 0, 0, &err))) {
if (err)
- ext4_error(inode->i_sb,
- "error %d reading directory #%lu offset 0",
- err, inode->i_ino);
+ EXT4_ERROR_INODE(inode,
+ "error %d reading directory lblock 0", err);
else
ext4_warning(inode->i_sb,
"bad directory (dir #%lu) - no data block",
de = ext4_next_entry(de1, sb->s_blocksize);
while (offset < inode->i_size) {
if (!bh ||
- (void *) de >= (void *) (bh->b_data+sb->s_blocksize)) {
+ (void *) de >= (void *) (bh->b_data+sb->s_blocksize)) {
+ unsigned int lblock;
err = 0;
brelse(bh);
- bh = ext4_bread(NULL, inode,
- offset >> EXT4_BLOCK_SIZE_BITS(sb), 0, &err);
+ lblock = offset >> EXT4_BLOCK_SIZE_BITS(sb);
+ bh = ext4_bread(NULL, inode, lblock, 0, &err);
if (!bh) {
if (err)
- ext4_error(sb,
- "error %d reading directory"
- " #%lu offset %u",
- err, inode->i_ino, offset);
+ EXT4_ERROR_INODE(inode,
+ "error %d reading directory "
+ "lblock %u", err, lblock);
offset += sb->s_blocksize;
continue;
}
de = (struct ext4_dir_entry_2 *) bh->b_data;
}
- if (!ext4_check_dir_entry("empty_dir", inode, de, bh, offset)) {
+ if (ext4_check_dir_entry(inode, NULL, de, bh, offset)) {
de = (struct ext4_dir_entry_2 *)(bh->b_data +
sb->s_blocksize);
offset = (offset | (sb->s_blocksize - 1)) + 1;
err = ext4_reserve_inode_write(handle, inode, &iloc);
if (err)
goto out_unlock;
+ /*
+ * Due to previous errors inode may be already a part of on-disk
+ * orphan list. If so skip on-disk list modification.
+ */
+ if (NEXT_ORPHAN(inode) && NEXT_ORPHAN(inode) <=
+ (le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)))
+ goto mem_insert;
/* Insert this inode at the head of the on-disk orphan list... */
NEXT_ORPHAN(inode) = le32_to_cpu(EXT4_SB(sb)->s_es->s_last_orphan);
*
* This is safe: on error we're going to ignore the orphan list
* anyway on the next recovery. */
+mem_insert:
if (!err)
list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan);
struct ext4_dir_entry_2 *de;
handle_t *handle;
+ dentry_unhash(dentry);
+
/* Initialize quotas before so that eventual writes go in
* separate transaction */
- vfs_dq_init(dentry->d_inode);
+ dquot_initialize(dir);
+ dquot_initialize(dentry->d_inode);
+
handle = ext4_journal_start(dir, EXT4_DELETE_TRANS_BLOCKS(dir->i_sb));
if (IS_ERR(handle))
return PTR_ERR(handle);
struct ext4_dir_entry_2 *de;
handle_t *handle;
+ trace_ext4_unlink_enter(dir, dentry);
/* Initialize quotas before so that eventual writes go
* in separate transaction */
- vfs_dq_init(dentry->d_inode);
+ dquot_initialize(dir);
+ dquot_initialize(dentry->d_inode);
+
handle = ext4_journal_start(dir, EXT4_DELETE_TRANS_BLOCKS(dir->i_sb));
if (IS_ERR(handle))
return PTR_ERR(handle);
end_unlink:
ext4_journal_stop(handle);
brelse(bh);
+ trace_ext4_unlink_exit(dentry, retval);
return retval;
}
if (l > dir->i_sb->s_blocksize)
return -ENAMETOOLONG;
+ dquot_initialize(dir);
+
retry:
handle = ext4_journal_start(dir, EXT4_DATA_TRANS_BLOCKS(dir->i_sb) +
EXT4_INDEX_EXTRA_TRANS_BLOCKS + 5 +
}
} else {
/* clear the extent format for fast symlink */
- EXT4_I(inode)->i_flags &= ~EXT4_EXTENTS_FL;
+ ext4_clear_inode_flag(inode, EXT4_INODE_EXTENTS);
inode->i_op = &ext4_fast_symlink_inode_operations;
memcpy((char *)&EXT4_I(inode)->i_data, symname, l);
inode->i_size = l-1;
if (inode->i_nlink >= EXT4_LINK_MAX)
return -EMLINK;
- /*
- * Return -ENOENT if we've raced with unlink and i_nlink is 0. Doing
- * otherwise has the potential to corrupt the orphan inode list.
- */
- if (inode->i_nlink == 0)
- return -ENOENT;
+ dquot_initialize(dir);
retry:
handle = ext4_journal_start(dir, EXT4_DATA_TRANS_BLOCKS(dir->i_sb) +
inode->i_ctime = ext4_current_time(inode);
ext4_inc_count(handle, inode);
- atomic_inc(&inode->i_count);
+ ihold(inode);
err = ext4_add_entry(handle, dentry, inode);
if (!err) {
struct ext4_dir_entry_2 *old_de, *new_de;
int retval, force_da_alloc = 0;
+ if (new_dentry->d_inode && S_ISDIR(new_dentry->d_inode->i_mode))
+ dentry_unhash(new_dentry);
+
+ dquot_initialize(old_dir);
+ dquot_initialize(new_dir);
+
old_bh = new_bh = dir_bh = NULL;
/* Initialize quotas before so that eventual writes go
* in separate transaction */
if (new_dentry->d_inode)
- vfs_dq_init(new_dentry->d_inode);
+ dquot_initialize(new_dentry->d_inode);
handle = ext4_journal_start(old_dir, 2 *
EXT4_DATA_TRANS_BLOCKS(old_dir->i_sb) +
EXT4_INDEX_EXTRA_TRANS_BLOCKS + 2);
if (!new_inode && new_dir != old_dir &&
EXT4_DIR_LINK_MAX(new_dir))
goto end_rename;
+ BUFFER_TRACE(dir_bh, "get_write_access");
+ retval = ext4_journal_get_write_access(handle, dir_bh);
+ if (retval)
+ goto end_rename;
}
if (!new_bh) {
retval = ext4_add_entry(handle, new_dentry, old_inode);
goto end_rename;
} else {
BUFFER_TRACE(new_bh, "get write access");
- ext4_journal_get_write_access(handle, new_bh);
+ retval = ext4_journal_get_write_access(handle, new_bh);
+ if (retval)
+ goto end_rename;
new_de->inode = cpu_to_le32(old_inode->i_ino);
if (EXT4_HAS_INCOMPAT_FEATURE(new_dir->i_sb,
EXT4_FEATURE_INCOMPAT_FILETYPE))
ext4_current_time(new_dir);
ext4_mark_inode_dirty(handle, new_dir);
BUFFER_TRACE(new_bh, "call ext4_handle_dirty_metadata");
- ext4_handle_dirty_metadata(handle, new_dir, new_bh);
+ retval = ext4_handle_dirty_metadata(handle, new_dir, new_bh);
+ if (unlikely(retval)) {
+ ext4_std_error(new_dir->i_sb, retval);
+ goto end_rename;
+ }
brelse(new_bh);
new_bh = NULL;
}
old_dir->i_ctime = old_dir->i_mtime = ext4_current_time(old_dir);
ext4_update_dx_flag(old_dir);
if (dir_bh) {
- BUFFER_TRACE(dir_bh, "get_write_access");
- ext4_journal_get_write_access(handle, dir_bh);
PARENT_INO(dir_bh->b_data, new_dir->i_sb->s_blocksize) =
cpu_to_le32(new_dir->i_ino);
BUFFER_TRACE(dir_bh, "call ext4_handle_dirty_metadata");
- ext4_handle_dirty_metadata(handle, old_dir, dir_bh);
+ retval = ext4_handle_dirty_metadata(handle, old_dir, dir_bh);
+ if (retval) {
+ ext4_std_error(old_dir->i_sb, retval);
+ goto end_rename;
+ }
ext4_dec_count(handle, old_dir);
if (new_inode) {
/* checked empty_dir above, can't have another parent,
Code Review / linux-3.10.git / blobdiff