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authorChuck Lever <cel@netapp.com>2006-03-20 13:44:13 -0500
committerTrond Myklebust <Trond.Myklebust@netapp.com>2006-03-20 13:44:13 -0500
commitd9ef5a8c26aab09762afce43df64736720b4860e (patch)
tree01ec0e16b19d7e418f26f1218113bb0f90b1a2e1 /include/linux/nfs_fs_sb.h
parentc8bded96aa8735823e53c95a26177987ebb19a90 (diff)
NFS: introduce mechanism for tracking NFS client metrics
Add a per-superblock performance counter facility to the NFS client. This facility mimics the counters available for block devices and for networking. Expose these new counters via the new /proc/self/mountstats interface. Thanks to Andrew Morton and Trond Myklebust for their review and comments. Test plan: fsx and iozone on UP and SMP systems, with and without pre-emption. Watch for memory overwrite bugs, and performance loss (significantly more CPU required per op). Signed-off-by: Chuck Lever <cel@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'include/linux/nfs_fs_sb.h')
-rw-r--r--include/linux/nfs_fs_sb.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/nfs_fs_sb.h b/include/linux/nfs_fs_sb.h
index a522ab97358..d65e69a06b7 100644
--- a/include/linux/nfs_fs_sb.h
+++ b/include/linux/nfs_fs_sb.h
@@ -4,6 +4,8 @@
#include <linux/list.h>
#include <linux/backing-dev.h>
+struct nfs_iostats;
+
/*
* NFS client parameters stored in the superblock.
*/
@@ -12,6 +14,7 @@ struct nfs_server {
struct rpc_clnt * client_sys; /* 2nd handle for FSINFO */
struct rpc_clnt * client_acl; /* ACL RPC client handle */
struct nfs_rpc_ops * rpc_ops; /* NFS protocol vector */
+ struct nfs_iostats * io_stats; /* I/O statistics */
struct backing_dev_info backing_dev_info;
int flags; /* various flags */
unsigned int caps; /* server capabilities */