/* * linux/fs/nfsd/stats.c * * procfs-based user access to knfsd statistics * * /proc/net/rpc/nfsd * * Format: * rc * Statistsics for the reply cache * fh * statistics for filehandle lookup * io * statistics for IO throughput * th <10%-20%> <20%-30%> ... <90%-100%> <100%> * time (milliseconds) 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 */ #include #include #include #include #define __NO_VERSION__ #include #include #include #include #include struct nfsd_stats nfsdstats; struct svc_stat nfsd_svcstats = { &nfsd_program, }; static int nfsd_proc_read(char *buffer, char **start, off_t offset, int count, int *eof, void *data) { int len; int i; len = sprintf(buffer, "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: */ len += sprintf(buffer+len, "th %u %u", nfsdstats.th_cnt, nfsdstats.th_fullcnt); for (i=0; i<10; i++) len += sprintf(buffer+len, " %u", nfsdstats.th_usage[i]); /* newline and ra-cache */ len += sprintf(buffer+len, "\nra %u", nfsdstats.ra_size); for (i=0; i<11; i++) len += sprintf(buffer+len, " %u", nfsdstats.ra_depth[i]); len += sprintf(buffer+len, "\n"); /* Assume we haven't hit EOF yet. Will be set by svc_proc_read. */ *eof = 0; /* * Append generic nfsd RPC statistics if there's room for it. */ if (len <= offset) { len = svc_proc_read(buffer, start, offset - len, count, eof, data); return len; } if (len < count) { len += svc_proc_read(buffer + len, start, 0, count - len, eof, data); } if (offset >= len) { *start = buffer; return 0; } *start = buffer + offset; if ((len -= offset) > count) return count; return len; } void nfsd_stat_init(void) { struct proc_dir_entry *ent; if ((ent = svc_proc_register(&nfsd_svcstats)) != 0) { ent->read_proc = nfsd_proc_read; ent->owner = THIS_MODULE; } } void nfsd_stat_shutdown(void) { svc_proc_unregister("nfsd"); }