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authorJeff Layton <jlayton@redhat.com>2012-12-11 12:10:05 -0500
committerAl Viro <viro@zeniv.linux.org.uk>2012-12-20 18:50:01 -0500
commit836fb7e7b978e5f3b8b52e40838ddc50264723f0 (patch)
tree777bbb681013843c3cbad6b908bdc6c4aee3c09b
parentb9d6ba94b875192ef5e2dab92d72beea33b83c3d (diff)
downloadlinux-836fb7e7b978e5f3b8b52e40838ddc50264723f0.tar.bz2
vfs: make fstatat retry on ESTALE errors from getattr call
Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
-rw-r--r--fs/stat.c8
1 files changed, 6 insertions, 2 deletions
diff --git a/fs/stat.c b/fs/stat.c
index eae494630a36..d22199527880 100644
--- a/fs/stat.c
+++ b/fs/stat.c
@@ -74,7 +74,7 @@ int vfs_fstatat(int dfd, const char __user *filename, struct kstat *stat,
{
struct path path;
int error = -EINVAL;
- int lookup_flags = 0;
+ unsigned int lookup_flags = 0;
if ((flag & ~(AT_SYMLINK_NOFOLLOW | AT_NO_AUTOMOUNT |
AT_EMPTY_PATH)) != 0)
@@ -84,13 +84,17 @@ int vfs_fstatat(int dfd, const char __user *filename, struct kstat *stat,
lookup_flags |= LOOKUP_FOLLOW;
if (flag & AT_EMPTY_PATH)
lookup_flags |= LOOKUP_EMPTY;
-
+retry:
error = user_path_at(dfd, filename, lookup_flags, &path);
if (error)
goto out;
error = vfs_getattr(path.mnt, path.dentry, stat);
path_put(&path);
+ if (retry_estale(error, lookup_flags)) {
+ lookup_flags |= LOOKUP_REVAL;
+ goto retry;
+ }
out:
return error;
}