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| author | Theodore Ts'o <tytso@mit.edu> | 2008-08-19 21:57:43 -0400 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2008-08-19 21:57:43 -0400 |
| commit | d015641734cde55d2fce48a6db3983c8a029fe05 (patch) | |
| tree | af2f6f0ef56d3b525227196f0caed1fb19ab4014 | |
| parent | cd21322616c3af265d39bf15321d436e667a5dd1 (diff) | |
| download | kernel-crypto-d015641734cde55d2fce48a6db3983c8a029fe05.tar.gz kernel-crypto-d015641734cde55d2fce48a6db3983c8a029fe05.tar.xz kernel-crypto-d015641734cde55d2fce48a6db3983c8a029fe05.zip | |
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>
| -rw-r--r-- | fs/ext4/dir.c | 20 |
1 files changed, 15 insertions, 5 deletions
diff --git a/fs/ext4/dir.c b/fs/ext4/dir.c index d3d23d73c08..ec8e33b4521 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) { |