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authorTrond Myklebust <trond.myklebust@primarydata.com>2015-01-24 13:54:37 -0500
committerTrond Myklebust <trond.myklebust@primarydata.com>2015-01-24 18:46:48 -0500
commit40dd4b7aee1a8c3b8dac7b67ba710692d7691b77 (patch)
tree43d0c0de69e2d95331f62e1150dcfab70f5ec5b2 /fs/nfs/pnfs.h
parentb4019c0e219bb1301865f8b2efedb4773526ed91 (diff)
downloadlinux-40dd4b7aee1a8c3b8dac7b67ba710692d7691b77.tar.bz2
NFSv4.1: Optimise layout return-on-close
Optimise the layout return on close code by ensuring that 1) Add a check for whether we hold a layout before taking any spinlocks 2) Only take the spin lock once 3) Use nfs_state->state to speed up open file checks Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Diffstat (limited to 'fs/nfs/pnfs.h')
-rw-r--r--fs/nfs/pnfs.h10
1 files changed, 10 insertions, 0 deletions
diff --git a/fs/nfs/pnfs.h b/fs/nfs/pnfs.h
index 9ae5b765b073..a98d8fd9637f 100644
--- a/fs/nfs/pnfs.h
+++ b/fs/nfs/pnfs.h
@@ -275,6 +275,11 @@ void nfs4_mark_deviceid_unavailable(struct nfs4_deviceid_node *node);
bool nfs4_test_deviceid_unavailable(struct nfs4_deviceid_node *node);
void nfs4_deviceid_purge_client(const struct nfs_client *);
+static inline bool nfs_have_layout(struct inode *inode)
+{
+ return NFS_I(inode)->layout != NULL;
+}
+
static inline struct nfs4_deviceid_node *
nfs4_get_deviceid(struct nfs4_deviceid_node *d)
{
@@ -427,6 +432,11 @@ static inline void nfs4_print_deviceid(const struct nfs4_deviceid *dev_id)
#endif /* NFS_DEBUG */
#else /* CONFIG_NFS_V4_1 */
+static inline bool nfs_have_layout(struct inode *inode)
+{
+ return false;
+}
+
static inline void pnfs_destroy_all_layouts(struct nfs_client *clp)
{
}