From 836fb7e7b978e5f3b8b52e40838ddc50264723f0 Mon Sep 17 00:00:00 2001 From: Jeff Layton Date: Tue, 11 Dec 2012 12:10:05 -0500 Subject: [PATCH] vfs: make fstatat retry on ESTALE errors from getattr call Signed-off-by: Jeff Layton Signed-off-by: Al Viro --- fs/stat.c | 8 ++++++-- 1 file 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; }