diff options
| author | Jeff Layton <jlayton@kernel.org> | 2020-11-09 13:14:07 -0500 |
|---|---|---|
| committer | Ilya Dryomov <idryomov@gmail.com> | 2020-12-14 23:21:47 +0100 |
| commit | 04fabb1199d1f995d6b9a1c42c046ac4bdac2d19 (patch) | |
| tree | 45de0adda672462288a08f5e9948f760ffe48582 /fs/ceph | |
| parent | 8ba3b8c7fba4631a6689d976264067b446af4c1e (diff) | |
| download | linux-04fabb1199d1f995d6b9a1c42c046ac4bdac2d19.tar.bz2 | |
ceph: ensure we have Fs caps when fetching dir link count
The link count for a directory is defined as inode->i_subdirs + 2,
(for "." and ".."). i_subdirs is only populated when Fs caps are held.
Ensure we grab Fs caps when fetching the link count for a directory.
[ idryomov: break unnecessarily long line ]
URL: https://tracker.ceph.com/issues/48125
Signed-off-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Diffstat (limited to 'fs/ceph')
| -rw-r--r-- | fs/ceph/inode.c | 19 |
1 files changed, 14 insertions, 5 deletions
diff --git a/fs/ceph/inode.c b/fs/ceph/inode.c index 02b11a4a4d39..12140da244f3 100644 --- a/fs/ceph/inode.c +++ b/fs/ceph/inode.c @@ -2340,15 +2340,23 @@ int ceph_permission(struct inode *inode, int mask) } /* Craft a mask of needed caps given a set of requested statx attrs. */ -static int statx_to_caps(u32 want) +static int statx_to_caps(u32 want, umode_t mode) { int mask = 0; if (want & (STATX_MODE|STATX_UID|STATX_GID|STATX_CTIME|STATX_BTIME)) mask |= CEPH_CAP_AUTH_SHARED; - if (want & (STATX_NLINK|STATX_CTIME)) - mask |= CEPH_CAP_LINK_SHARED; + if (want & (STATX_NLINK|STATX_CTIME)) { + /* + * The link count for directories depends on inode->i_subdirs, + * and that is only updated when Fs caps are held. + */ + if (S_ISDIR(mode)) + mask |= CEPH_CAP_FILE_SHARED; + else + mask |= CEPH_CAP_LINK_SHARED; + } if (want & (STATX_ATIME|STATX_MTIME|STATX_CTIME|STATX_SIZE| STATX_BLOCKS)) @@ -2374,8 +2382,9 @@ int ceph_getattr(const struct path *path, struct kstat *stat, /* Skip the getattr altogether if we're asked not to sync */ if (!(flags & AT_STATX_DONT_SYNC)) { - err = ceph_do_getattr(inode, statx_to_caps(request_mask), - flags & AT_STATX_FORCE_SYNC); + err = ceph_do_getattr(inode, + statx_to_caps(request_mask, inode->i_mode), + flags & AT_STATX_FORCE_SYNC); if (err) return err; } |