Initial import of modified Linux 2.6.28 tree

Original upstream URL:
git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git | branch linux-2.6.28.y

1 files changed, 71 insertions, 0 deletions

diff --git a/fs/nfs/iostat.h b/fs/nfs/iostat.h
new file mode 100644
index 0000000..a369528
--- /dev/null
+++ b/fs/nfs/iostat.h
@@ -0,0 +1,71 @@
+/*
+ *  linux/fs/nfs/iostat.h
+ *
+ *  Declarations for NFS client per-mount statistics
+ *
+ *  Copyright (C) 2005, 2006 Chuck Lever <cel@netapp.com>
+ *
+ */
+
+#ifndef _NFS_IOSTAT
+#define _NFS_IOSTAT
+
+#include <linux/percpu.h>
+#include <linux/cache.h>
+#include <linux/nfs_iostat.h>
+
+struct nfs_iostats {
+	unsigned long long	bytes[__NFSIOS_BYTESMAX];
+	unsigned long		events[__NFSIOS_COUNTSMAX];
+} ____cacheline_aligned;
+
+static inline void nfs_inc_server_stats(const struct nfs_server *server,
+					enum nfs_stat_eventcounters stat)
+{
+	struct nfs_iostats *iostats;
+	int cpu;
+
+	cpu = get_cpu();
+	iostats = per_cpu_ptr(server->io_stats, cpu);
+	iostats->events[stat]++;
+	put_cpu_no_resched();
+}
+
+static inline void nfs_inc_stats(const struct inode *inode,
+				 enum nfs_stat_eventcounters stat)
+{
+	nfs_inc_server_stats(NFS_SERVER(inode), stat);
+}
+
+static inline void nfs_add_server_stats(const struct nfs_server *server,
+					enum nfs_stat_bytecounters stat,
+					unsigned long addend)
+{
+	struct nfs_iostats *iostats;
+	int cpu;
+
+	cpu = get_cpu();
+	iostats = per_cpu_ptr(server->io_stats, cpu);
+	iostats->bytes[stat] += addend;
+	put_cpu_no_resched();
+}
+
+static inline void nfs_add_stats(const struct inode *inode,
+				 enum nfs_stat_bytecounters stat,
+				 unsigned long addend)
+{
+	nfs_add_server_stats(NFS_SERVER(inode), stat, addend);
+}
+
+static inline struct nfs_iostats *nfs_alloc_iostats(void)
+{
+	return alloc_percpu(struct nfs_iostats);
+}
+
+static inline void nfs_free_iostats(struct nfs_iostats *stats)
+{
+	if (stats != NULL)
+		free_percpu(stats);
+}
+
+#endif /* _NFS_IOSTAT */