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ext3: dirindex error pointer issues

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- ext3_dx_find_entry() exit with out setting proper error pointer

- do_split() exit with out setting proper error pointer
  it is realy painful because many callers contain folowing code:

          de = do_split(handle,dir, &bh, frame, &hinfo, &retval);
          if (!(de))
                       return retval;
          <<< WOW retval wasn't changed by do_split(), so caller failed
          <<< but return SUCCESS :)

- Rearrange do_split() error path. Current error path is realy ugly, all
  this up and down jump stuff doesn't make code easy to understand.

[dmonakhov@sw.ru: fix annoying fake error messages]
Signed-off-by: Monakhov Dmitriy <dmonakhov@openvz.org>
Cc: Andreas Dilger <adilger@clusterfs.com>
Cc: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Monakhov Dmitriy <dmonakhov@openvz.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Dmitriy Monakhov 2007-05-08 00:25:34 -07:00 committed by Linus Torvalds
parent 753e9c5cd9
commit fedee54d8f
2 changed files with 30 additions and 22 deletions
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26
fs/ext3/namei.c
View file

@ -969,6 +969,7 @@ static struct buffer_head * ext3_dx_find_entry(struct dentry *dentry,
(block<<EXT3_BLOCK_SIZE_BITS(sb))
+((char *)de - bh->b_data))) {
brelse (bh);
*err = ERR_BAD_DX_DIR;
goto errout;
}
*res_dir = de;
@ -1134,9 +1135,9 @@ static struct ext3_dir_entry_2 *do_split(handle_t *handle, struct inode *dir,
char *data1 = (*bh)->b_data, *data2;
unsigned split;
struct ext3_dir_entry_2 *de = NULL, *de2;
int err;
int err = 0;
bh2 = ext3_append (handle, dir, &newblock, error);
bh2 = ext3_append (handle, dir, &newblock, &err);
if (!(bh2)) {
brelse(*bh);
*bh = NULL;
@ -1145,14 +1146,9 @@ static struct ext3_dir_entry_2 *do_split(handle_t *handle, struct inode *dir,
BUFFER_TRACE(*bh, "get_write_access");
err = ext3_journal_get_write_access(handle, *bh);
if (err) {
journal_error:
brelse(*bh);
brelse(bh2);
*bh = NULL;
ext3_std_error(dir->i_sb, err);
goto errout;
}
if (err)
goto journal_error;
BUFFER_TRACE(frame->bh, "get_write_access");
err = ext3_journal_get_write_access(handle, frame->bh);
if (err)
@ -1195,8 +1191,16 @@ static struct ext3_dir_entry_2 *do_split(handle_t *handle, struct inode *dir,
goto journal_error;
brelse (bh2);
dxtrace(dx_show_index ("frame", frame->entries));
errout:
return de;
journal_error:
brelse(*bh);
brelse(bh2);
*bh = NULL;
ext3_std_error(dir->i_sb, err);
errout:
*error = err;
return NULL;
}
#endif

26
fs/ext4/namei.c
View file

@ -967,6 +967,7 @@ static struct buffer_head * ext4_dx_find_entry(struct dentry *dentry,
(block<<EXT4_BLOCK_SIZE_BITS(sb))
+((char *)de - bh->b_data))) {
brelse (bh);
*err = ERR_BAD_DX_DIR;
goto errout;
}
*res_dir = de;
@ -1132,9 +1133,9 @@ static struct ext4_dir_entry_2 *do_split(handle_t *handle, struct inode *dir,
char *data1 = (*bh)->b_data, *data2;
unsigned split;
struct ext4_dir_entry_2 *de = NULL, *de2;
int err;
int err = 0;
bh2 = ext4_append (handle, dir, &newblock, error);
bh2 = ext4_append (handle, dir, &newblock, &err);
if (!(bh2)) {
brelse(*bh);
*bh = NULL;
@ -1143,14 +1144,9 @@ static struct ext4_dir_entry_2 *do_split(handle_t *handle, struct inode *dir,
BUFFER_TRACE(*bh, "get_write_access");
err = ext4_journal_get_write_access(handle, *bh);
if (err) {
journal_error:
brelse(*bh);
brelse(bh2);
*bh = NULL;
ext4_std_error(dir->i_sb, err);
goto errout;
}
if (err)
goto journal_error;
BUFFER_TRACE(frame->bh, "get_write_access");
err = ext4_journal_get_write_access(handle, frame->bh);
if (err)
@ -1193,8 +1189,16 @@ static struct ext4_dir_entry_2 *do_split(handle_t *handle, struct inode *dir,
goto journal_error;
brelse (bh2);
dxtrace(dx_show_index ("frame", frame->entries));
errout:
return de;
journal_error:
brelse(*bh);
brelse(bh2);
*bh = NULL;
ext4_std_error(dir->i_sb, err);
errout:
*error = err;
return NULL;
}
#endif