diff options
| author | Jeff Layton <jlayton@redhat.com> | 2012-12-11 12:10:10 -0500 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2012-12-20 18:50:05 -0500 |
| commit | c6a9428401c00a27d3c17264934d14e284570c97 (patch) | |
| tree | 84d5e256e78615794a694cf5b6af80a92e8d01f9 /fs/namei.c | |
| parent | 5d18f8133cad85ccbb7fa6fd351d75025da32504 (diff) | |
| download | linux-stable-c6a9428401c00a27d3c17264934d14e284570c97.tar.gz linux-stable-c6a9428401c00a27d3c17264934d14e284570c97.tar.bz2 linux-stable-c6a9428401c00a27d3c17264934d14e284570c97.zip | |
vfs: fix renameat to retry on ESTALE errors
...as always, rename is the messiest of the bunch. We have to track
whether to retry or not via a separate flag since the error handling
is already quite complex.
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/namei.c')
| -rw-r--r-- | fs/namei.c | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/fs/namei.c b/fs/namei.c index 8a262c2efff8..43a97ee1d4c8 100644 --- a/fs/namei.c +++ b/fs/namei.c @@ -3840,15 +3840,17 @@ SYSCALL_DEFINE4(renameat, int, olddfd, const char __user *, oldname, struct nameidata oldnd, newnd; struct filename *from; struct filename *to; + unsigned int lookup_flags = 0; + bool should_retry = false; int error; - - from = user_path_parent(olddfd, oldname, &oldnd, 0); +retry: + from = user_path_parent(olddfd, oldname, &oldnd, lookup_flags); if (IS_ERR(from)) { error = PTR_ERR(from); goto exit; } - to = user_path_parent(newdfd, newname, &newnd, 0); + to = user_path_parent(newdfd, newname, &newnd, lookup_flags); if (IS_ERR(to)) { error = PTR_ERR(to); goto exit1; @@ -3920,11 +3922,18 @@ exit3: unlock_rename(new_dir, old_dir); mnt_drop_write(oldnd.path.mnt); exit2: + if (retry_estale(error, lookup_flags)) + should_retry = true; path_put(&newnd.path); putname(to); exit1: path_put(&oldnd.path); putname(from); + if (should_retry) { + should_retry = false; + lookup_flags |= LOOKUP_REVAL; + goto retry; + } exit: return error; } |