Messages in this thread Patch in this message | | | Date | Mon, 4 Aug 2008 13:14:47 -0700 | From | Greg KH <> | Subject | [patch 04/33] return to old errno choice in mkdir() et.al. |
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2.6.25-stable review patch. If anyone has any objections, please let us know.
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From: Al Viro <viro@zeniv.linux.org.uk>
commit e9baf6e59842285bcf9570f5094e4c27674a0f7c upstream
In case when both EEXIST and EROFS would apply we used to return the former in mkdir(2) and friends. Lest anyone suspects us of being consistent, in the same situation knfsd gave clients nfs_erofs...
ro-bind series had switched the syscall side of things to returning -EROFS and immediately broke an application - namely, mkdir -p. Patch restores the original behaviour...
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Acked-by: Jan Blunck <jblunck@suse.de> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
--- fs/namei.c | 12 ++++++++---- 1 file changed, 8 insertions(+), 4 deletions(-)
--- a/fs/namei.c +++ b/fs/namei.c @@ -1904,18 +1904,22 @@ struct dentry *lookup_create(struct name if (IS_ERR(dentry)) goto fail; + if (dentry->d_inode) + goto eexist; /* * Special case - lookup gave negative, but... we had foo/bar/ * From the vfs_mknod() POV we just have a negative dentry - * all is fine. Let's be bastards - you had / on the end, you've * been asking for (non-existent) directory. -ENOENT for you. */ - if (!is_dir && nd->last.name[nd->last.len] && !dentry->d_inode) - goto enoent; + if (unlikely(!is_dir && nd->last.name[nd->last.len])) { + dput(dentry); + dentry = ERR_PTR(-ENOENT); + } return dentry; -enoent: +eexist: dput(dentry); - dentry = ERR_PTR(-ENOENT); + dentry = ERR_PTR(-EEXIST); fail: return dentry; } --
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