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ext3: fix ext3_dx_readdir hash collision handling

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This fixes a bug where readdir() would return a directory entry twice
if there was a hash collision in an hash tree indexed directory.

[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Eugene Dashevsky <eugene@ibrix.com>
Signed-off-by: Mike Snitzer <msnitzer@ibrix.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Eugene Dashevsky 2008-10-18 20:27:59 -07:00 • committed by Linus Torvalds
commit 6a897cf447
1 changed files with 15 additions and 5 deletions
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20
fs/ext3/dir.c
View file

@ -410,7 +410,7 @@ static int call_filldir(struct file * filp, void * dirent,
get_dtype(sb, fname->file_type));
if (error) {
filp->f_pos = curr_pos;
info->extra_fname = fname->next;
info->extra_fname = fname;
return error;
}
fname = fname->next;
@ -449,11 +449,21 @@ static int ext3_dx_readdir(struct file * filp,
* If there are any leftover names on the hash collision
* chain, return them first.
*/
if (info->extra_fname &&
call_filldir(filp, dirent, filldir, info->extra_fname))
goto finished;
if (info->extra_fname) {
if (call_filldir(filp, dirent, filldir, info->extra_fname))
goto finished;
if (!info->curr_node)
info->extra_fname = NULL;
info->curr_node = rb_next(info->curr_node);
if (!info->curr_node) {
if (info->next_hash == ~0) {
filp->f_pos = EXT3_HTREE_EOF;
goto finished;
}
info->curr_hash = info->next_hash;
info->curr_minor_hash = 0;
}
} else if (!info->curr_node)
info->curr_node = rb_first(&info->root);
while (1) {