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Diffstat (limited to 'fs/ext3/namei.c')
-rw-r--r--fs/ext3/namei.c400
1 files changed, 253 insertions, 147 deletions
diff --git a/fs/ext3/namei.c b/fs/ext3/namei.c
index bce9dce639b..f197736dccf 100644
--- a/fs/ext3/namei.c
+++ b/fs/ext3/namei.c
@@ -24,19 +24,8 @@
* Theodore Ts'o, 2002
*/
-#include <linux/fs.h>
-#include <linux/pagemap.h>
-#include <linux/jbd.h>
-#include <linux/time.h>
-#include <linux/ext3_fs.h>
-#include <linux/ext3_jbd.h>
-#include <linux/fcntl.h>
-#include <linux/stat.h>
-#include <linux/string.h>
#include <linux/quotaops.h>
-#include <linux/buffer_head.h>
-#include <linux/bio.h>
-
+#include "ext3.h"
#include "namei.h"
#include "xattr.h"
#include "acl.h"
@@ -47,7 +36,6 @@
#define NAMEI_RA_CHUNKS 2
#define NAMEI_RA_BLOCKS 4
#define NAMEI_RA_SIZE (NAMEI_RA_CHUNKS * NAMEI_RA_BLOCKS)
-#define NAMEI_RA_INDEX(c,b) (((c) * NAMEI_RA_BLOCKS) + (b))
static struct buffer_head *ext3_append(handle_t *handle,
struct inode *inode,
@@ -57,8 +45,7 @@ static struct buffer_head *ext3_append(handle_t *handle,
*block = inode->i_size >> inode->i_sb->s_blocksize_bits;
- bh = ext3_bread(handle, inode, *block, 1, err);
- if (bh) {
+ if ((bh = ext3_dir_bread(handle, inode, *block, 1, err))) {
inode->i_size += inode->i_sb->s_blocksize;
EXT3_I(inode)->i_disksize = inode->i_size;
*err = ext3_journal_get_write_access(handle, bh);
@@ -287,7 +274,7 @@ static struct stats dx_show_leaf(struct dx_hash_info *hinfo, struct ext3_dir_ent
while (len--) printk("%c", *name++);
ext3fs_dirhash(de->name, de->name_len, &h);
printk(":%x.%u ", h.hash,
- ((char *) de - base));
+ (unsigned) ((char *) de - base));
}
space += EXT3_DIR_REC_LEN(de->name_len);
names++;
@@ -350,8 +337,10 @@ dx_probe(struct qstr *entry, struct inode *dir,
u32 hash;
frame->bh = NULL;
- if (!(bh = ext3_bread (NULL,dir, 0, 0, err)))
+ if (!(bh = ext3_dir_bread(NULL, dir, 0, 0, err))) {
+ *err = ERR_BAD_DX_DIR;
goto fail;
+ }
root = (struct dx_root *) bh->b_data;
if (root->info.hash_version != DX_HASH_TEA &&
root->info.hash_version != DX_HASH_HALF_MD4 &&
@@ -447,8 +436,10 @@ dx_probe(struct qstr *entry, struct inode *dir,
frame->entries = entries;
frame->at = at;
if (!indirect--) return frame;
- if (!(bh = ext3_bread (NULL,dir, dx_get_block(at), 0, err)))
+ if (!(bh = ext3_dir_bread(NULL, dir, dx_get_block(at), 0, err))) {
+ *err = ERR_BAD_DX_DIR;
goto fail2;
+ }
at = entries = ((struct dx_node *) bh->b_data)->entries;
if (dx_get_limit(entries) != dx_node_limit (dir)) {
ext3_warning(dir->i_sb, __func__,
@@ -546,8 +537,8 @@ static int ext3_htree_next_block(struct inode *dir, __u32 hash,
* block so no check is necessary
*/
while (num_frames--) {
- if (!(bh = ext3_bread(NULL, dir, dx_get_block(p->at),
- 0, &err)))
+ if (!(bh = ext3_dir_bread(NULL, dir, dx_get_block(p->at),
+ 0, &err)))
return err; /* Failure */
p++;
brelse (p->bh);
@@ -570,10 +561,11 @@ static int htree_dirblock_to_tree(struct file *dir_file,
{
struct buffer_head *bh;
struct ext3_dir_entry_2 *de, *top;
- int err, count = 0;
+ int err = 0, count = 0;
dxtrace(printk("In htree dirblock_to_tree: block %d\n", block));
- if (!(bh = ext3_bread (NULL, dir, block, 0, &err)))
+
+ if (!(bh = ext3_dir_bread(NULL, dir, block, 0, &err)))
return err;
de = (struct ext3_dir_entry_2 *) bh->b_data;
@@ -584,11 +576,8 @@ static int htree_dirblock_to_tree(struct file *dir_file,
if (!ext3_check_dir_entry("htree_dirblock_to_tree", dir, de, bh,
(block<<EXT3_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;
- brelse (bh);
- return count;
+ /* silently ignore the rest of the block */
+ break;
}
ext3fs_dirhash(de->name, de->name_len, hinfo);
if ((hinfo->hash < start_hash) ||
@@ -631,7 +620,7 @@ int ext3_htree_fill_tree(struct file *dir_file, __u32 start_hash,
dxtrace(printk("In htree_fill_tree, start hash: %x:%x\n", start_hash,
start_minor_hash));
- dir = dir_file->f_path.dentry->d_inode;
+ dir = file_inode(dir_file);
if (!(EXT3_I(dir)->i_flags & EXT3_INDEX_FL)) {
hinfo.hash_version = EXT3_SB(dir->i_sb)->s_def_hash_version;
if (hinfo.hash_version <= DX_HASH_TEA)
@@ -645,7 +634,7 @@ int ext3_htree_fill_tree(struct file *dir_file, __u32 start_hash,
}
hinfo.hash = start_hash;
hinfo.minor_hash = 0;
- frame = dx_probe(NULL, dir_file->f_path.dentry->d_inode, &hinfo, frames, &err);
+ frame = dx_probe(NULL, file_inode(dir_file), &hinfo, frames, &err);
if (!frame)
return err;
@@ -858,6 +847,7 @@ static struct buffer_head *ext3_find_entry(struct inode *dir,
struct buffer_head * bh_use[NAMEI_RA_SIZE];
struct buffer_head * bh, *ret = NULL;
unsigned long start, block, b;
+ const u8 *name = entry->name;
int ra_max = 0; /* Number of bh's in the readahead
buffer, bh_use[] */
int ra_ptr = 0; /* Current index into readahead
@@ -871,6 +861,16 @@ static struct buffer_head *ext3_find_entry(struct inode *dir,
namelen = entry->len;
if (namelen > EXT3_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 = ext3_dx_find_entry(dir, entry, res_dir, &err);
/*
@@ -909,8 +909,12 @@ restart:
num++;
bh = ext3_getblk(NULL, dir, b++, 0, &err);
bh_use[ra_max] = bh;
- if (bh)
- ll_rw_block(READ_META, 1, &bh);
+ if (bh && !bh_uptodate_or_lock(bh)) {
+ get_bh(bh);
+ bh->b_end_io = end_buffer_read_sync;
+ submit_bh(READ | REQ_META | REQ_PRIO,
+ bh);
+ }
}
}
if ((bh = bh_use[ra_ptr++]) == NULL)
@@ -961,55 +965,35 @@ static struct buffer_head * ext3_dx_find_entry(struct inode *dir,
struct qstr *entry, struct ext3_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 ext3_dir_entry_2 *de, *top;
struct buffer_head *bh;
unsigned long block;
int retval;
- int namelen = entry->len;
- const u8 *name = entry->name;
- sb = dir->i_sb;
- /* NFS may look up ".." - look at dx_root directory block */
- if (namelen > 2 || name[0] != '.'|| (namelen == 2 && name[1] != '.')) {
- if (!(frame = dx_probe(entry, 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(entry, dir, &hinfo, frames, err)))
+ return NULL;
do {
block = dx_get_block(frame->at);
- if (!(bh = ext3_bread (NULL,dir, block, 0, err)))
+ if (!(bh = ext3_dir_bread (NULL, dir, block, 0, err)))
goto errout;
- de = (struct ext3_dir_entry_2 *) bh->b_data;
- top = (struct ext3_dir_entry_2 *) ((char *) de + sb->s_blocksize -
- EXT3_DIR_REC_LEN(0));
- for (; de < top; de = ext3_next_entry(de)) {
- int off = (block << EXT3_BLOCK_SIZE_BITS(sb))
- + ((char *) de - bh->b_data);
-
- if (!ext3_check_dir_entry(__func__, dir, de, bh, off)) {
- brelse(bh);
- *err = ERR_BAD_DX_DIR;
- goto errout;
- }
- if (ext3_match(namelen, name, de)) {
- *res_dir = de;
- dx_release(frames);
- return bh;
- }
+ retval = search_dirblock(bh, dir, entry,
+ block << EXT3_BLOCK_SIZE_BITS(sb),
+ res_dir);
+ if (retval == 1) {
+ dx_release(frames);
+ return bh;
}
- brelse (bh);
+ brelse(bh);
+ if (retval == -1) {
+ *err = ERR_BAD_DX_DIR;
+ goto errout;
+ }
+
/* Check to see if we should continue to search */
- retval = ext3_htree_next_block(dir, hash, frame,
+ retval = ext3_htree_next_block(dir, hinfo.hash, frame,
frames, NULL);
if (retval < 0) {
ext3_warning(sb, __func__,
@@ -1022,12 +1006,12 @@ static struct buffer_head * ext3_dx_find_entry(struct inode *dir,
*err = -ENOENT;
errout:
- dxtrace(printk("%s not found\n", name));
+ dxtrace(printk("%s not found\n", entry->name));
dx_release (frames);
return NULL;
}
-static struct dentry *ext3_lookup(struct inode * dir, struct dentry *dentry, struct nameidata *nd)
+static struct dentry *ext3_lookup(struct inode * dir, struct dentry *dentry, unsigned int flags)
{
struct inode * inode;
struct ext3_dir_entry_2 * de;
@@ -1047,15 +1031,11 @@ static struct dentry *ext3_lookup(struct inode * dir, struct dentry *dentry, str
return ERR_PTR(-EIO);
}
inode = ext3_iget(dir->i_sb, ino);
- if (unlikely(IS_ERR(inode))) {
- if (PTR_ERR(inode) == -ESTALE) {
- ext3_error(dir->i_sb, __func__,
- "deleted inode referenced: %lu",
- ino);
- return ERR_PTR(-EIO);
- } else {
- return ERR_CAST(inode);
- }
+ if (inode == ERR_PTR(-ESTALE)) {
+ ext3_error(dir->i_sb, __func__,
+ "deleted inode referenced: %lu",
+ ino);
+ return ERR_PTR(-EIO);
}
}
return d_splice_alias(inode, dentry);
@@ -1065,7 +1045,7 @@ static struct dentry *ext3_lookup(struct inode * dir, struct dentry *dentry, str
struct dentry *ext3_get_parent(struct dentry *child)
{
unsigned long ino;
- struct qstr dotdot = {.name = "..", .len = 2};
+ struct qstr dotdot = QSTR_INIT("..", 2);
struct ext3_dir_entry_2 * de;
struct buffer_head *bh;
@@ -1425,10 +1405,19 @@ static int make_indexed_dir(handle_t *handle, struct dentry *dentry,
frame->at = entries;
frame->bh = bh;
bh = bh2;
+ /*
+ * Mark buffers dirty here so that if do_split() fails we write a
+ * consistent set of buffers to disk.
+ */
+ ext3_journal_dirty_metadata(handle, frame->bh);
+ ext3_journal_dirty_metadata(handle, bh);
de = do_split(handle,dir, &bh, frame, &hinfo, &retval);
- dx_release (frames);
- if (!(de))
+ if (!de) {
+ ext3_mark_inode_dirty(handle, dir);
+ dx_release(frames);
return retval;
+ }
+ dx_release(frames);
return add_dirent_to_buf(handle, dentry, inode, de, bh);
}
@@ -1469,9 +1458,9 @@ static int ext3_add_entry (handle_t *handle, struct dentry *dentry,
}
blocks = dir->i_size >> sb->s_blocksize_bits;
for (block = 0; block < blocks; block++) {
- bh = ext3_bread(handle, dir, block, 0, &retval);
- if(!bh)
+ if (!(bh = ext3_dir_bread(handle, dir, block, 0, &retval)))
return retval;
+
retval = add_dirent_to_buf(handle, dentry, inode, NULL, bh);
if (retval != -ENOSPC)
return retval;
@@ -1511,7 +1500,7 @@ static int ext3_dx_add_entry(handle_t *handle, struct dentry *dentry,
entries = frame->entries;
at = frame->at;
- if (!(bh = ext3_bread(handle,dir, dx_get_block(frame->at), 0, &err)))
+ if (!(bh = ext3_dir_bread(handle, dir, dx_get_block(frame->at), 0, &err)))
goto cleanup;
BUFFER_TRACE(bh, "get_write_access");
@@ -1549,8 +1538,8 @@ static int ext3_dx_add_entry(handle_t *handle, struct dentry *dentry,
goto cleanup;
node2 = (struct dx_node *)(bh2->b_data);
entries2 = node2->entries;
+ memset(&node2->fake, 0, sizeof(struct fake_dirent));
node2->fake.rec_len = ext3_rec_len_to_disk(sb->s_blocksize);
- node2->fake.inode = 0;
BUFFER_TRACE(frame->bh, "get_write_access");
err = ext3_journal_get_write_access(handle, frame->bh);
if (err)
@@ -1607,7 +1596,9 @@ static int ext3_dx_add_entry(handle_t *handle, struct dentry *dentry,
if (err)
goto journal_error;
}
- ext3_journal_dirty_metadata(handle, frames[0].bh);
+ err = ext3_journal_dirty_metadata(handle, frames[0].bh);
+ if (err)
+ goto journal_error;
}
de = do_split(handle, dir, &bh, frame, &hinfo, &err);
if (!de)
@@ -1644,8 +1635,13 @@ static int ext3_delete_entry (handle_t *handle,
if (!ext3_check_dir_entry("ext3_delete_entry", dir, de, bh, i))
return -EIO;
if (de == de_del) {
+ int err;
+
BUFFER_TRACE(bh, "get_write_access");
- ext3_journal_get_write_access(handle, bh);
+ err = ext3_journal_get_write_access(handle, bh);
+ if (err)
+ goto journal_error;
+
if (pde)
pde->rec_len = ext3_rec_len_to_disk(
ext3_rec_len_from_disk(pde->rec_len) +
@@ -1654,7 +1650,12 @@ static int ext3_delete_entry (handle_t *handle,
de->inode = 0;
dir->i_version++;
BUFFER_TRACE(bh, "call ext3_journal_dirty_metadata");
- ext3_journal_dirty_metadata(handle, bh);
+ err = ext3_journal_dirty_metadata(handle, bh);
+ if (err) {
+journal_error:
+ ext3_std_error(dir->i_sb, err);
+ return err;
+ }
return 0;
}
i += ext3_rec_len_from_disk(de->rec_len);
@@ -1670,8 +1671,8 @@ static int ext3_add_nondir(handle_t *handle,
int err = ext3_add_entry(handle, dentry, inode);
if (!err) {
ext3_mark_inode_dirty(handle, inode);
- d_instantiate(dentry, inode);
unlock_new_inode(inode);
+ d_instantiate(dentry, inode);
return 0;
}
drop_nlink(inode);
@@ -1688,8 +1689,8 @@ static int ext3_add_nondir(handle_t *handle,
* If the create succeeds, we fill in the inode information
* with d_instantiate().
*/
-static int ext3_create (struct inode * dir, struct dentry * dentry, int mode,
- struct nameidata *nd)
+static int ext3_create (struct inode * dir, struct dentry * dentry, umode_t mode,
+ bool excl)
{
handle_t *handle;
struct inode * inode;
@@ -1707,7 +1708,7 @@ retry:
if (IS_DIRSYNC(dir))
handle->h_sync = 1;
- inode = ext3_new_inode (handle, dir, mode);
+ inode = ext3_new_inode (handle, dir, &dentry->d_name, mode);
err = PTR_ERR(inode);
if (!IS_ERR(inode)) {
inode->i_op = &ext3_file_inode_operations;
@@ -1722,7 +1723,7 @@ retry:
}
static int ext3_mknod (struct inode * dir, struct dentry *dentry,
- int mode, dev_t rdev)
+ umode_t mode, dev_t rdev)
{
handle_t *handle;
struct inode *inode;
@@ -1743,7 +1744,7 @@ retry:
if (IS_DIRSYNC(dir))
handle->h_sync = 1;
- inode = ext3_new_inode (handle, dir, mode);
+ inode = ext3_new_inode (handle, dir, &dentry->d_name, mode);
err = PTR_ERR(inode);
if (!IS_ERR(inode)) {
init_special_inode(inode, inode->i_mode, rdev);
@@ -1758,11 +1759,49 @@ retry:
return err;
}
-static int ext3_mkdir(struct inode * dir, struct dentry * dentry, int mode)
+static int ext3_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode)
+{
+ handle_t *handle;
+ struct inode *inode;
+ int err, retries = 0;
+
+ dquot_initialize(dir);
+
+retry:
+ handle = ext3_journal_start(dir, EXT3_MAXQUOTAS_INIT_BLOCKS(dir->i_sb) +
+ 4 + EXT3_XATTR_TRANS_BLOCKS);
+
+ if (IS_ERR(handle))
+ return PTR_ERR(handle);
+
+ inode = ext3_new_inode (handle, dir, NULL, mode);
+ err = PTR_ERR(inode);
+ if (!IS_ERR(inode)) {
+ inode->i_op = &ext3_file_inode_operations;
+ inode->i_fop = &ext3_file_operations;
+ ext3_set_aops(inode);
+ d_tmpfile(dentry, inode);
+ err = ext3_orphan_add(handle, inode);
+ if (err)
+ goto err_unlock_inode;
+ mark_inode_dirty(inode);
+ unlock_new_inode(inode);
+ }
+ ext3_journal_stop(handle);
+ if (err == -ENOSPC && ext3_should_retry_alloc(dir->i_sb, &retries))
+ goto retry;
+ return err;
+err_unlock_inode:
+ ext3_journal_stop(handle);
+ unlock_new_inode(inode);
+ return err;
+}
+
+static int ext3_mkdir(struct inode * dir, struct dentry * dentry, umode_t mode)
{
handle_t *handle;
struct inode * inode;
- struct buffer_head * dir_block;
+ struct buffer_head * dir_block = NULL;
struct ext3_dir_entry_2 * de;
int err, retries = 0;
@@ -1781,7 +1820,7 @@ retry:
if (IS_DIRSYNC(dir))
handle->h_sync = 1;
- inode = ext3_new_inode (handle, dir, S_IFDIR | mode);
+ inode = ext3_new_inode (handle, dir, &dentry->d_name, S_IFDIR | mode);
err = PTR_ERR(inode);
if (IS_ERR(inode))
goto out_stop;
@@ -1789,16 +1828,14 @@ retry:
inode->i_op = &ext3_dir_inode_operations;
inode->i_fop = &ext3_dir_operations;
inode->i_size = EXT3_I(inode)->i_disksize = inode->i_sb->s_blocksize;
- dir_block = ext3_bread (handle, inode, 0, 1, &err);
- if (!dir_block) {
- drop_nlink(inode); /* is this nlink == 0? */
- unlock_new_inode(inode);
- ext3_mark_inode_dirty(handle, inode);
- iput (inode);
- goto out_stop;
- }
+ if (!(dir_block = ext3_dir_bread(handle, inode, 0, 1, &err)))
+ goto out_clear_inode;
+
BUFFER_TRACE(dir_block, "get_write_access");
- ext3_journal_get_write_access(handle, dir_block);
+ err = ext3_journal_get_write_access(handle, dir_block);
+ if (err)
+ goto out_clear_inode;
+
de = (struct ext3_dir_entry_2 *) dir_block->b_data;
de->inode = cpu_to_le32(inode->i_ino);
de->name_len = 1;
@@ -1812,14 +1849,19 @@ retry:
de->name_len = 2;
strcpy (de->name, "..");
ext3_set_de_type(dir->i_sb, de, S_IFDIR);
- inode->i_nlink = 2;
+ set_nlink(inode, 2);
BUFFER_TRACE(dir_block, "call ext3_journal_dirty_metadata");
- ext3_journal_dirty_metadata(handle, dir_block);
- brelse (dir_block);
- ext3_mark_inode_dirty(handle, inode);
- err = ext3_add_entry (handle, dentry, inode);
+ err = ext3_journal_dirty_metadata(handle, dir_block);
+ if (err)
+ goto out_clear_inode;
+
+ err = ext3_mark_inode_dirty(handle, inode);
+ if (!err)
+ err = ext3_add_entry (handle, dentry, inode);
+
if (err) {
- inode->i_nlink = 0;
+out_clear_inode:
+ clear_nlink(inode);
unlock_new_inode(inode);
ext3_mark_inode_dirty(handle, inode);
iput (inode);
@@ -1827,10 +1869,14 @@ retry:
}
inc_nlink(dir);
ext3_update_dx_flag(dir);
- ext3_mark_inode_dirty(handle, dir);
- d_instantiate(dentry, inode);
+ err = ext3_mark_inode_dirty(handle, dir);
+ if (err)
+ goto out_clear_inode;
+
unlock_new_inode(inode);
+ d_instantiate(dentry, inode);
out_stop:
+ brelse(dir_block);
ext3_journal_stop(handle);
if (err == -ENOSPC && ext3_should_retry_alloc(dir->i_sb, &retries))
goto retry;
@@ -1850,7 +1896,7 @@ static int empty_dir (struct inode * inode)
sb = inode->i_sb;
if (inode->i_size < EXT3_DIR_REC_LEN(1) + EXT3_DIR_REC_LEN(2) ||
- !(bh = ext3_bread (NULL, inode, 0, 0, &err))) {
+ !(bh = ext3_dir_bread(NULL, inode, 0, 0, &err))) {
if (err)
ext3_error(inode->i_sb, __func__,
"error %d reading directory #%lu offset 0",
@@ -1881,9 +1927,8 @@ static int empty_dir (struct inode * inode)
(void *) de >= (void *) (bh->b_data+sb->s_blocksize)) {
err = 0;
brelse (bh);
- bh = ext3_bread (NULL, inode,
- offset >> EXT3_BLOCK_SIZE_BITS(sb), 0, &err);
- if (!bh) {
+ if (!(bh = ext3_dir_bread (NULL, inode,
+ offset >> EXT3_BLOCK_SIZE_BITS(sb), 0, &err))) {
if (err)
ext3_error(sb, __func__,
"error %d reading directory"
@@ -2124,6 +2169,7 @@ static int ext3_unlink(struct inode * dir, struct dentry *dentry)
struct ext3_dir_entry_2 * de;
handle_t *handle;
+ trace_ext3_unlink_enter(dir, dentry);
/* Initialize quotas before so that eventual writes go
* in separate transaction */
dquot_initialize(dir);
@@ -2151,7 +2197,7 @@ static int ext3_unlink(struct inode * dir, struct dentry *dentry)
ext3_warning (inode->i_sb, "ext3_unlink",
"Deleting nonexistent file (%lu), %d",
inode->i_ino, inode->i_nlink);
- inode->i_nlink = 1;
+ set_nlink(inode, 1);
}
retval = ext3_delete_entry(handle, dir, de, bh);
if (retval)
@@ -2169,6 +2215,7 @@ static int ext3_unlink(struct inode * dir, struct dentry *dentry)
end_unlink:
ext3_journal_stop(handle);
brelse (bh);
+ trace_ext3_unlink_exit(dentry, retval);
return retval;
}
@@ -2178,6 +2225,7 @@ static int ext3_symlink (struct inode * dir,
handle_t *handle;
struct inode * inode;
int l, err, retries = 0;
+ int credits;
l = strlen(symname)+1;
if (l > dir->i_sb->s_blocksize)
@@ -2185,36 +2233,78 @@ static int ext3_symlink (struct inode * dir,
dquot_initialize(dir);
+ if (l > EXT3_N_BLOCKS * 4) {
+ /*
+ * For non-fast symlinks, we just allocate inode and put it on
+ * orphan list in the first transaction => we need bitmap,
+ * group descriptor, sb, inode block, quota blocks, and
+ * possibly selinux xattr blocks.
+ */
+ credits = 4 + EXT3_MAXQUOTAS_INIT_BLOCKS(dir->i_sb) +
+ EXT3_XATTR_TRANS_BLOCKS;
+ } else {
+ /*
+ * Fast symlink. We have to add entry to directory
+ * (EXT3_DATA_TRANS_BLOCKS + EXT3_INDEX_EXTRA_TRANS_BLOCKS),
+ * allocate new inode (bitmap, group descriptor, inode block,
+ * quota blocks, sb is already counted in previous macros).
+ */
+ credits = EXT3_DATA_TRANS_BLOCKS(dir->i_sb) +
+ EXT3_INDEX_EXTRA_TRANS_BLOCKS + 3 +
+ EXT3_MAXQUOTAS_INIT_BLOCKS(dir->i_sb);
+ }
retry:
- handle = ext3_journal_start(dir, EXT3_DATA_TRANS_BLOCKS(dir->i_sb) +
- EXT3_INDEX_EXTRA_TRANS_BLOCKS + 5 +
- EXT3_MAXQUOTAS_INIT_BLOCKS(dir->i_sb));
+ handle = ext3_journal_start(dir, credits);
if (IS_ERR(handle))
return PTR_ERR(handle);
if (IS_DIRSYNC(dir))
handle->h_sync = 1;
- inode = ext3_new_inode (handle, dir, S_IFLNK|S_IRWXUGO);
+ inode = ext3_new_inode (handle, dir, &dentry->d_name, S_IFLNK|S_IRWXUGO);
err = PTR_ERR(inode);
if (IS_ERR(inode))
goto out_stop;
- if (l > sizeof (EXT3_I(inode)->i_data)) {
+ if (l > EXT3_N_BLOCKS * 4) {
inode->i_op = &ext3_symlink_inode_operations;
ext3_set_aops(inode);
/*
- * page_symlink() calls into ext3_prepare/commit_write.
- * We have a transaction open. All is sweetness. It also sets
- * i_size in generic_commit_write().
+ * We cannot call page_symlink() with transaction started
+ * because it calls into ext3_write_begin() which acquires page
+ * lock which ranks below transaction start (and it can also
+ * wait for journal commit if we are running out of space). So
+ * we have to stop transaction now and restart it when symlink
+ * contents is written.
+ *
+ * To keep fs consistent in case of crash, we have to put inode
+ * to orphan list in the mean time.
*/
+ drop_nlink(inode);
+ err = ext3_orphan_add(handle, inode);
+ ext3_journal_stop(handle);
+ if (err)
+ goto err_drop_inode;
err = __page_symlink(inode, symname, l, 1);
+ if (err)
+ goto err_drop_inode;
+ /*
+ * Now inode is being linked into dir (EXT3_DATA_TRANS_BLOCKS
+ * + EXT3_INDEX_EXTRA_TRANS_BLOCKS), inode is also modified
+ */
+ handle = ext3_journal_start(dir,
+ EXT3_DATA_TRANS_BLOCKS(dir->i_sb) +
+ EXT3_INDEX_EXTRA_TRANS_BLOCKS + 1);
+ if (IS_ERR(handle)) {
+ err = PTR_ERR(handle);
+ goto err_drop_inode;
+ }
+ set_nlink(inode, 1);
+ err = ext3_orphan_del(handle, inode);
if (err) {
+ ext3_journal_stop(handle);
drop_nlink(inode);
- unlock_new_inode(inode);
- ext3_mark_inode_dirty(handle, inode);
- iput (inode);
- goto out_stop;
+ goto err_drop_inode;
}
} else {
inode->i_op = &ext3_fast_symlink_inode_operations;
@@ -2228,6 +2318,10 @@ out_stop:
if (err == -ENOSPC && ext3_should_retry_alloc(dir->i_sb, &retries))
goto retry;
return err;
+err_drop_inode:
+ unlock_new_inode(inode);
+ iput(inode);
+ return err;
}
static int ext3_link (struct dentry * old_dentry,
@@ -2242,16 +2336,9 @@ static int ext3_link (struct dentry * old_dentry,
dquot_initialize(dir);
- /*
- * 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;
-
retry:
handle = ext3_journal_start(dir, EXT3_DATA_TRANS_BLOCKS(dir->i_sb) +
- EXT3_INDEX_EXTRA_TRANS_BLOCKS);
+ EXT3_INDEX_EXTRA_TRANS_BLOCKS + 1);
if (IS_ERR(handle))
return PTR_ERR(handle);
@@ -2265,6 +2352,11 @@ retry:
err = ext3_add_entry(handle, dentry, inode);
if (!err) {
ext3_mark_inode_dirty(handle, inode);
+ /* this can happen only for tmpfile being
+ * linked the first time
+ */
+ if (inode->i_nlink == 1)
+ ext3_orphan_del(handle, inode);
d_instantiate(dentry, inode);
} else {
drop_nlink(inode);
@@ -2337,7 +2429,7 @@ static int ext3_rename (struct inode * old_dir, struct dentry *old_dentry,
goto end_rename;
}
retval = -EIO;
- dir_bh = ext3_bread (handle, old_inode, 0, 0, &retval);
+ dir_bh = ext3_dir_bread(handle, old_inode, 0, 0, &retval);
if (!dir_bh)
goto end_rename;
if (le32_to_cpu(PARENT_INO(dir_bh->b_data)) != old_dir->i_ino)
@@ -2353,7 +2445,9 @@ static int ext3_rename (struct inode * old_dir, struct dentry *old_dentry,
goto end_rename;
} else {
BUFFER_TRACE(new_bh, "get write access");
- ext3_journal_get_write_access(handle, new_bh);
+ retval = ext3_journal_get_write_access(handle, new_bh);
+ if (retval)
+ goto journal_error;
new_de->inode = cpu_to_le32(old_inode->i_ino);
if (EXT3_HAS_INCOMPAT_FEATURE(new_dir->i_sb,
EXT3_FEATURE_INCOMPAT_FILETYPE))
@@ -2362,7 +2456,9 @@ static int ext3_rename (struct inode * old_dir, struct dentry *old_dentry,
new_dir->i_ctime = new_dir->i_mtime = CURRENT_TIME_SEC;
ext3_mark_inode_dirty(handle, new_dir);
BUFFER_TRACE(new_bh, "call ext3_journal_dirty_metadata");
- ext3_journal_dirty_metadata(handle, new_bh);
+ retval = ext3_journal_dirty_metadata(handle, new_bh);
+ if (retval)
+ goto journal_error;
brelse(new_bh);
new_bh = NULL;
}
@@ -2411,10 +2507,17 @@ static int ext3_rename (struct inode * old_dir, struct dentry *old_dentry,
ext3_update_dx_flag(old_dir);
if (dir_bh) {
BUFFER_TRACE(dir_bh, "get_write_access");
- ext3_journal_get_write_access(handle, dir_bh);
+ retval = ext3_journal_get_write_access(handle, dir_bh);
+ if (retval)
+ goto journal_error;
PARENT_INO(dir_bh->b_data) = cpu_to_le32(new_dir->i_ino);
BUFFER_TRACE(dir_bh, "call ext3_journal_dirty_metadata");
- ext3_journal_dirty_metadata(handle, dir_bh);
+ retval = ext3_journal_dirty_metadata(handle, dir_bh);
+ if (retval) {
+journal_error:
+ ext3_std_error(new_dir->i_sb, retval);
+ goto end_rename;
+ }
drop_nlink(old_dir);
if (new_inode) {
drop_nlink(new_inode);
@@ -2456,6 +2559,7 @@ const struct inode_operations ext3_dir_inode_operations = {
.mkdir = ext3_mkdir,
.rmdir = ext3_rmdir,
.mknod = ext3_mknod,
+ .tmpfile = ext3_tmpfile,
.rename = ext3_rename,
.setattr = ext3_setattr,
#ifdef CONFIG_EXT3_FS_XATTR
@@ -2464,7 +2568,8 @@ const struct inode_operations ext3_dir_inode_operations = {
.listxattr = ext3_listxattr,
.removexattr = generic_removexattr,
#endif
- .check_acl = ext3_check_acl,
+ .get_acl = ext3_get_acl,
+ .set_acl = ext3_set_acl,
};
const struct inode_operations ext3_special_inode_operations = {
@@ -2475,5 +2580,6 @@ const struct inode_operations ext3_special_inode_operations = {
.listxattr = ext3_listxattr,
.removexattr = generic_removexattr,
#endif
- .check_acl = ext3_check_acl,
+ .get_acl = ext3_get_acl,
+ .set_acl = ext3_set_acl,
};
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-04 08:10:58 +0000