1 files changed, 101 insertions, 0 deletions

diff --git a/fs/nfsd/stats.c b/fs/nfsd/stats.c
new file mode 100644
index 000000000000..1cf955bcc526
--- /dev/null
+++ b/fs/nfsd/stats.c
@@ -0,0 +1,101 @@
+/*
+ * linux/fs/nfsd/stats.c
+ *
+ * procfs-based user access to knfsd statistics
+ *
+ * /proc/net/rpc/nfsd
+ *
+ * Format:
+ *      rc <hits> <misses> <nocache>
+ *                      Statistsics for the reply cache
+ *      fh <stale> <total-lookups> <anonlookups> <dir-not-in-dcache> <nondir-not-in-dcache>
+ *                      statistics for filehandle lookup
+ *      io <bytes-read> <bytes-writtten>
+ *                      statistics for IO throughput
+ *      th <threads> <fullcnt> <10%-20%> <20%-30%> ... <90%-100%> <100%> 
+ *                      time (seconds) when nfsd thread usage above thresholds
+ *                      and number of times that all threads were in use
+ *      ra cache-size  <10%  <20%  <30% ... <100% not-found
+ *                      number of times that read-ahead entry was found that deep in
+ *                      the cache.
+ *      plus generic RPC stats (see net/sunrpc/stats.c)
+ *
+ * Copyright (C) 1995, 1996, 1997 Olaf Kirch <okir@monad.swb.de>
+ */
+
+#include <linux/kernel.h>
+#include <linux/time.h>
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
+#include <linux/stat.h>
+#include <linux/module.h>
+
+#include <linux/sunrpc/svc.h>
+#include <linux/sunrpc/stats.h>
+#include <linux/nfsd/nfsd.h>
+#include <linux/nfsd/stats.h>
+
+struct nfsd_stats       nfsdstats;
+struct svc_stat         nfsd_svcstats = {
+        .program        = &nfsd_program,
+};
+
+static int nfsd_proc_show(struct seq_file *seq, void *v)
+{
+        int i;
+
+        seq_printf(seq, "rc %u %u %u\nfh %u %u %u %u %u\nio %u %u\n",
+                      nfsdstats.rchits,
+                      nfsdstats.rcmisses,
+                      nfsdstats.rcnocache,
+                      nfsdstats.fh_stale,
+                      nfsdstats.fh_lookup,
+                      nfsdstats.fh_anon,
+                      nfsdstats.fh_nocache_dir,
+                      nfsdstats.fh_nocache_nondir,
+                      nfsdstats.io_read,
+                      nfsdstats.io_write);
+        /* thread usage: */
+        seq_printf(seq, "th %u %u", nfsdstats.th_cnt, nfsdstats.th_fullcnt);
+        for (i=0; i<10; i++) {
+                unsigned int jifs = nfsdstats.th_usage[i];
+                unsigned int sec = jifs / HZ, msec = (jifs % HZ)*1000/HZ;
+                seq_printf(seq, " %u.%03u", sec, msec);
+        }
+
+        /* newline and ra-cache */
+        seq_printf(seq, "\nra %u", nfsdstats.ra_size);
+        for (i=0; i<11; i++)
+                seq_printf(seq, " %u", nfsdstats.ra_depth[i]);
+        seq_putc(seq, '\n');
+        
+        /* show my rpc info */
+        svc_seq_show(seq, &nfsd_svcstats);
+
+        return 0;
+}
+
+static int nfsd_proc_open(struct inode *inode, struct file *file)
+{
+        return single_open(file, nfsd_proc_show, NULL);
+}
+
+static struct file_operations nfsd_proc_fops = {
+        .owner = THIS_MODULE,
+        .open = nfsd_proc_open,
+        .read  = seq_read,
+        .llseek = seq_lseek,
+        .release = single_release,
+};
+
+void
+nfsd_stat_init(void)
+{
+        svc_proc_register(&nfsd_svcstats, &nfsd_proc_fops);
+}
+
+void
+nfsd_stat_shutdown(void)
+{
+        svc_proc_unregister("nfsd");
+}