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| author | Trond Myklebust | 2014-02-06 20:38:53 +0100 |
|---|---|---|
| committer | Trond Myklebust | 2014-02-10 14:44:12 +0100 |
| commit | fd1defc257e2b12ab69bc0b379105c00eca4e112 (patch) | |
| tree | f0058b38b262aacd30da1ac5e4e85fb37451f559 /fs/nfs/internal.h | |
| parent | Linux 3.14-rc2 (diff) | |
| download | kernel-qcow2-linux-fd1defc257e2b12ab69bc0b379105c00eca4e112.tar.gz kernel-qcow2-linux-fd1defc257e2b12ab69bc0b379105c00eca4e112.tar.xz kernel-qcow2-linux-fd1defc257e2b12ab69bc0b379105c00eca4e112.zip | |
NFS: Do not set NFS_INO_INVALID_LABEL unless server supports labeled NFS
Commit aa9c2669626c (NFS: Client implementation of Labeled-NFS) introduces
a performance regression. When nfs_zap_caches_locked is called, it sets
the NFS_INO_INVALID_LABEL flag irrespectively of whether or not the
NFS server supports security labels. Since that flag is never cleared,
it means that all calls to nfs_revalidate_inode() will now trigger
an on-the-wire GETATTR call.
This patch ensures that we never set the NFS_INO_INVALID_LABEL unless the
server advertises support for labeled NFS.
It also causes nfs_setsecurity() to clear NFS_INO_INVALID_LABEL when it
has successfully set the security label for the inode.
Finally it gets rid of the NFS_INO_INVALID_LABEL cruft from nfs_update_inode,
which has nothing to do with labeled NFS.
Reported-by: Neil Brown <neilb@suse.de>
Cc: stable@vger.kernel.org # 3.11+
Tested-by: Neil Brown <neilb@suse.de>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Diffstat (limited to 'fs/nfs/internal.h')
| -rw-r--r-- | fs/nfs/internal.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h index 8b5cc04a8611..fafdddac8271 100644 --- a/fs/nfs/internal.h +++ b/fs/nfs/internal.h @@ -279,9 +279,18 @@ static inline void nfs4_label_free(struct nfs4_label *label) } return; } + +static inline void nfs_zap_label_cache_locked(struct nfs_inode *nfsi) +{ + if (nfs_server_capable(&nfsi->vfs_inode, NFS_CAP_SECURITY_LABEL)) + nfsi->cache_validity |= NFS_INO_INVALID_LABEL; +} #else static inline struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags) { return NULL; } static inline void nfs4_label_free(void *label) {} +static inline void nfs_zap_label_cache_locked(struct nfs_inode *nfsi) +{ +} #endif /* CONFIG_NFS_V4_SECURITY_LABEL */ /* proc.c */ |