zfs/lib/libzpool/util.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21 /*
  22  * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
  23  * Use is subject to license terms.
  24  */
  25
  26
  27
  28 #include <assert.h>
  29 #include <sys/zfs_context.h>
  30 #include <sys/avl.h>
  31 #include <string.h>
  32 #include <stdio.h>
  33 #include <stdlib.h>
  34 #include <sys/spa.h>
  35 #include <sys/fs/zfs.h>
  36 #include <sys/refcount.h>
  37
  38 /*
  39  * Routines needed by more than one client of libzpool.
  40  */
  41
  42 void
  43 nicenum(uint64_t num, char *buf)
  44 {
  45         uint64_t n = num;
  46         int index = 0;
  47         char u;
  48
  49         while (n >= 1024) {
  50                 n = (n + (1024 / 2)) / 1024; /* Round up or down */
  51                 index++;
  52         }
  53
  54         u = " KMGTPE"[index];
  55
  56         if (index == 0) {
  57                 (void) sprintf(buf, "%llu", (u_longlong_t)n);
  58         } else if (n < 10 && (num & (num - 1)) != 0) {
  59                 (void) sprintf(buf, "%.2f%c",
  60                     (double)num / (1ULL << 10 * index), u);
  61         } else if (n < 100 && (num & (num - 1)) != 0) {
  62                 (void) sprintf(buf, "%.1f%c",
  63                     (double)num / (1ULL << 10 * index), u);
  64         } else {
  65                 (void) sprintf(buf, "%llu%c", (u_longlong_t)n, u);
  66         }
  67 }
  68
  69 static void
  70 show_vdev_stats(const char *desc, nvlist_t *nv, int indent)
  71 {
  72         nvlist_t **child;
  73         uint_t c, children;
  74         vdev_stat_t *vs;
  75         uint64_t sec;
  76         uint64_t is_log = 0;
  77         char used[6], avail[6];
  78         char rops[6], wops[6], rbytes[6], wbytes[6], rerr[6], werr[6], cerr[6];
  79         char *prefix = "";
  80
  81         if (indent == 0) {
  82                 (void) printf("                     "
  83                     " capacity   operations   bandwidth  ---- errors ----\n");
  84                 (void) printf("description          "
  85                     "used avail  read write  read write  read write cksum\n");
  86         }
  87
  88         VERIFY(nvlist_lookup_uint64_array(nv, ZPOOL_CONFIG_STATS,
  89             (uint64_t **)&vs, &c) == 0);
  90         (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_IS_LOG, &is_log);
  91
  92         if (is_log)
  93                 prefix = "log ";
  94
  95         sec = MAX(1, vs->vs_timestamp / NANOSEC);
  96
  97         nicenum(vs->vs_alloc, used);
  98         nicenum(vs->vs_space - vs->vs_alloc, avail);
  99         nicenum(vs->vs_ops[ZIO_TYPE_READ] / sec, rops);
 100         nicenum(vs->vs_ops[ZIO_TYPE_WRITE] / sec, wops);
 101         nicenum(vs->vs_bytes[ZIO_TYPE_READ] / sec, rbytes);
 102         nicenum(vs->vs_bytes[ZIO_TYPE_WRITE] / sec, wbytes);
 103         nicenum(vs->vs_read_errors, rerr);
 104         nicenum(vs->vs_write_errors, werr);
 105         nicenum(vs->vs_checksum_errors, cerr);
 106
 107         (void) printf("%*s%s%*s%*s%*s %5s %5s %5s %5s %5s %5s %5s\n",
 108             indent, "",
 109             prefix,
 110             indent + strlen(prefix) - 19 - (vs->vs_space ? 0 : 12), desc,
 111             vs->vs_space ? 6 : 0, vs->vs_space ? used : "",
 112             vs->vs_space ? 6 : 0, vs->vs_space ? avail : "",
 113             rops, wops, rbytes, wbytes, rerr, werr, cerr);
 114
 115         if (nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_CHILDREN,
 116             &child, &children) != 0)
 117                 return;
 118
 119         for (c = 0; c < children; c++) {
 120                 nvlist_t *cnv = child[c];
 121                 char *cname, *tname;
 122                 uint64_t np;
 123                 if (nvlist_lookup_string(cnv, ZPOOL_CONFIG_PATH, &cname) &&
 124                     nvlist_lookup_string(cnv, ZPOOL_CONFIG_TYPE, &cname))
 125                         cname = "<unknown>";
 126                 tname = calloc(1, strlen(cname) + 2);
 127                 (void) strcpy(tname, cname);
 128                 if (nvlist_lookup_uint64(cnv, ZPOOL_CONFIG_NPARITY, &np) == 0)
 129                         tname[strlen(tname)] = '0' + np;
 130                 show_vdev_stats(tname, cnv, indent + 2);
 131                 free(tname);
 132         }
 133 }
 134
 135 void
 136 show_pool_stats(spa_t *spa)
 137 {
 138         nvlist_t *config, *nvroot;
 139         char *name;
 140
 141         spa_config_enter(spa, RW_READER, FTAG);
 142         config = spa_config_generate(spa, NULL, -1ULL, B_TRUE);
 143         spa_config_exit(spa, FTAG);
 144
 145         VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE,
 146             &nvroot) == 0);
 147         VERIFY(nvlist_lookup_string(config, ZPOOL_CONFIG_POOL_NAME,
 148             &name) == 0);
 149
 150         show_vdev_stats(name, nvroot, 0);
 151 }