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authorTheodore Ts'o <tytso@mit.edu>2008-08-19 21:57:43 -0400
committerTheodore Ts'o <tytso@mit.edu>2008-08-19 21:57:43 -0400
commitd015641734cde55d2fce48a6db3983c8a029fe05 (patch)
treeaf2f6f0ef56d3b525227196f0caed1fb19ab4014 /fs/ext4/dir.c
parentcd21322616c3af265d39bf15321d436e667a5dd1 (diff)
downloadop-kernel-dev-d015641734cde55d2fce48a6db3983c8a029fe05.zip
op-kernel-dev-d015641734cde55d2fce48a6db3983c8a029fe05.tar.gz
ext4: Fix ext4_dx_readdir hash collision handling
This fixes a bug where readdir() would return a directory entry twice if there was a hash collision in an hash tree indexed directory. 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>
Diffstat (limited to 'fs/ext4/dir.c')
-rw-r--r--fs/ext4/dir.c20
1 files changed, 15 insertions, 5 deletions
diff --git a/fs/ext4/dir.c b/fs/ext4/dir.c
index d3d23d7..ec8e33b 100644
--- a/fs/ext4/dir.c
+++ b/fs/ext4/dir.c
@@ -411,7 +411,7 @@ 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;
@@ -450,11 +450,21 @@ static int ext4_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 = EXT4_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) {
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