Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / fs / nfsd / stats.c

diff --git a/kernel/fs/nfsd/stats.c b/kernel/fs/nfsd/stats.c
new file mode 100644 (file)
index 0000000..cd90878
--- /dev/null
+++ b/kernel/fs/nfsd/stats.c
@@ -0,0 +1,104 @@
+/*
+ * 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-written>
+ *                     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/seq_file.h>
+#include <linux/module.h>
+#include <linux/sunrpc/stats.h>
+#include <net/net_namespace.h>
+
+#include "nfsd.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);
+
+#ifdef CONFIG_NFSD_V4
+       /* Show count for individual nfsv4 operations */
+       /* Writing operation numbers 0 1 2 also for maintaining uniformity */
+       seq_printf(seq,"proc4ops %u", LAST_NFS4_OP + 1);
+       for (i = 0; i <= LAST_NFS4_OP; i++)
+               seq_printf(seq, " %u", nfsdstats.nfs4_opcount[i]);
+
+       seq_putc(seq, '\n');
+#endif
+
+       return 0;
+}
+
+static int nfsd_proc_open(struct inode *inode, struct file *file)
+{
+       return single_open(file, nfsd_proc_show, NULL);
+}
+
+static const 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(&init_net, &nfsd_svcstats, &nfsd_proc_fops);
+}
+
+void
+nfsd_stat_shutdown(void)
+{
+       svc_proc_unregister(&init_net, "nfsd");
+}