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| author | Jeff Layton <jlayton@redhat.com> | 2012-12-11 12:10:06 -0500 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2012-12-20 18:50:01 -0500 |
| commit | 7955119e02d9fdf78a39fba8073f19ca6152613e (patch) | |
| tree | 163bfbf2174ca89d541f63b0114b16665e02e6e5 | |
| parent | 836fb7e7b978e5f3b8b52e40838ddc50264723f0 (diff) | |
| download | linux-7955119e02d9fdf78a39fba8073f19ca6152613e.tar.bz2 | |
vfs: fix readlinkat to retry on ESTALE
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| -rw-r--r-- | fs/stat.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/fs/stat.c b/fs/stat.c index d22199527880..14f45459c83d 100644 --- a/fs/stat.c +++ b/fs/stat.c @@ -300,11 +300,13 @@ SYSCALL_DEFINE4(readlinkat, int, dfd, const char __user *, pathname, struct path path; int error; int empty = 0; + unsigned int lookup_flags = LOOKUP_EMPTY; if (bufsiz <= 0) return -EINVAL; - error = user_path_at_empty(dfd, pathname, LOOKUP_EMPTY, &path, &empty); +retry: + error = user_path_at_empty(dfd, pathname, lookup_flags, &path, &empty); if (!error) { struct inode *inode = path.dentry->d_inode; @@ -318,6 +320,10 @@ SYSCALL_DEFINE4(readlinkat, int, dfd, const char __user *, pathname, } } path_put(&path); + if (retry_estale(error, lookup_flags)) { + lookup_flags |= LOOKUP_REVAL; + goto retry; + } } return error; } |