From 87fa55952b7347175c6e2f03874869ad2c055adb Mon Sep 17 00:00:00 2001 From: Jeff Layton Date: Tue, 11 Dec 2012 12:10:11 -0500 Subject: [PATCH] vfs: have faccessat retry once on an ESTALE error Signed-off-by: Jeff Layton Signed-off-by: Al Viro --- fs/open.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/fs/open.c b/fs/open.c index 07449b911a4d..a994ccf39b40 100644 --- a/fs/open.c +++ b/fs/open.c @@ -316,6 +316,7 @@ SYSCALL_DEFINE3(faccessat, int, dfd, const char __user *, filename, int, mode) struct path path; struct inode *inode; int res; + unsigned int lookup_flags = LOOKUP_FOLLOW; if (mode & ~S_IRWXO) /* where's F_OK, X_OK, W_OK, R_OK? */ return -EINVAL; @@ -338,8 +339,8 @@ SYSCALL_DEFINE3(faccessat, int, dfd, const char __user *, filename, int, mode) } old_cred = override_creds(override_cred); - - res = user_path_at(dfd, filename, LOOKUP_FOLLOW, &path); +retry: + res = user_path_at(dfd, filename, lookup_flags, &path); if (res) goto out; @@ -374,6 +375,10 @@ SYSCALL_DEFINE3(faccessat, int, dfd, const char __user *, filename, int, mode) out_path_release: path_put(&path); + if (retry_estale(res, lookup_flags)) { + lookup_flags |= LOOKUP_REVAL; + goto retry; + } out: revert_creds(old_cred); put_cred(override_cred); -- 2.11.0