zfs/lib/libspl/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 2008 Sun Microsystems, Inc.  All rights reserved.
  23  * Use is subject to license terms.
  24  */
  25
  26 #include <assert.h>
  27 #include <sys/zfs_context.h>
  28 #include <sys/avl.h>
  29 #include <string.h>
  30 #include <stdio.h>
  31 #include <stdlib.h>
  32 #include <sys/spa.h>
  33 #include <sys/fs/zfs.h>
  34 #include <sys/refcount.h>
  35
  36 /*
  37  * Routines needed by more than one client of libzpool.
  38  */
  39
  40 void
  41 nicenum(uint64_t num, char *buf)
  42 {
  43         uint64_t n = num;
  44         int index = 0;
  45         char u;
  46
  47         while (n >= 1024) {
  48                 n = (n + (1024 / 2)) / 1024; /* Round up or down */
  49                 index++;
  50         }
  51
  52         u = " KMGTPE"[index];
  53
  54         if (index == 0) {
  55                 (void) sprintf(buf, "%llu", (u_longlong_t)n);
  56         } else if (n < 10 && (num & (num - 1)) != 0) {
  57                 (void) sprintf(buf, "%.2f%c",
  58                     (double)num / (1ULL << 10 * index), u);
  59         } else if (n < 100 && (num & (num - 1)) != 0) {
  60                 (void) sprintf(buf, "%.1f%c",
  61                     (double)num / (1ULL << 10 * index), u);
  62         } else {
  63                 (void) sprintf(buf, "%llu%c", (u_longlong_t)n, u);
  64         }
  65 }
  66
  67 static void
  68 show_vdev_stats(const char *desc, const char *ctype, nvlist_t *nv, int indent)
  69 {
  70         vdev_stat_t *vs;
  71         vdev_stat_t v0 = { 0 };
  72         uint64_t sec;
  73         uint64_t is_log = 0;
  74         nvlist_t **child;
  75         uint_t c, children;
  76         char used[6], avail[6];
  77         char rops[6], wops[6], rbytes[6], wbytes[6], rerr[6], werr[6], cerr[6];
  78         char *prefix = "";
  79
  80         if (indent == 0 && desc != NULL) {
  81                 (void) printf("                           "
  82                     " capacity   operations   bandwidth  ---- errors ----\n");
  83                 (void) printf("description                "
  84                     "used avail  read write  read write  read write cksum\n");
  85         }
  86
  87         if (desc != NULL) {
  88                 (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_IS_LOG, &is_log);
  89
  90                 if (is_log)
  91                         prefix = "log ";
  92
  93                 if (nvlist_lookup_uint64_array(nv, ZPOOL_CONFIG_STATS,
  94                     (uint64_t **)&vs, &c) != 0)
  95                         vs = &v0;
  96
  97                 sec = MAX(1, vs->vs_timestamp / NANOSEC);
  98
  99                 nicenum(vs->vs_alloc, used);
 100                 nicenum(vs->vs_space - vs->vs_alloc, avail);
 101                 nicenum(vs->vs_ops[ZIO_TYPE_READ] / sec, rops);
 102                 nicenum(vs->vs_ops[ZIO_TYPE_WRITE] / sec, wops);
 103                 nicenum(vs->vs_bytes[ZIO_TYPE_READ] / sec, rbytes);
 104                 nicenum(vs->vs_bytes[ZIO_TYPE_WRITE] / sec, wbytes);
 105                 nicenum(vs->vs_read_errors, rerr);
 106                 nicenum(vs->vs_write_errors, werr);
 107                 nicenum(vs->vs_checksum_errors, cerr);
 108
 109                 (void) printf("%*s%s%*s%*s%*s %5s %5s %5s %5s %5s %5s %5s\n",
 110                     indent, "",
 111                     prefix,
 112                     indent + strlen(prefix) - 25 - (vs->vs_space ? 0 : 12),
 113                     desc,
 114                     vs->vs_space ? 6 : 0, vs->vs_space ? used : "",
 115                     vs->vs_space ? 6 : 0, vs->vs_space ? avail : "",
 116                     rops, wops, rbytes, wbytes, rerr, werr, cerr);
 117         }
 118
 119         if (nvlist_lookup_nvlist_array(nv, ctype, &child, &children) != 0)
 120                 return;
 121
 122         for (c = 0; c < children; c++) {
 123                 nvlist_t *cnv = child[c];
 124                 char *cname, *tname;
 125                 uint64_t np;
 126                 if (nvlist_lookup_string(cnv, ZPOOL_CONFIG_PATH, &cname) &&
 127                     nvlist_lookup_string(cnv, ZPOOL_CONFIG_TYPE, &cname))
 128                         cname = "<unknown>";
 129                 tname = calloc(1, strlen(cname) + 2);
 130                 (void) strcpy(tname, cname);
 131                 if (nvlist_lookup_uint64(cnv, ZPOOL_CONFIG_NPARITY, &np) == 0)
 132                         tname[strlen(tname)] = '0' + np;
 133                 show_vdev_stats(tname, ctype, cnv, indent + 2);
 134                 free(tname);
 135         }
 136 }
 137
 138 void
 139 show_pool_stats(spa_t *spa)
 140 {
 141         nvlist_t *config, *nvroot;
 142         char *name;
 143
 144         VERIFY(spa_get_stats(spa_name(spa), &config, NULL, 0) == 0);
 145
 146         VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE,
 147             &nvroot) == 0);
 148         VERIFY(nvlist_lookup_string(config, ZPOOL_CONFIG_POOL_NAME,
 149             &name) == 0);
 150
 151         show_vdev_stats(name, ZPOOL_CONFIG_CHILDREN, nvroot, 0);
 152         show_vdev_stats(NULL, ZPOOL_CONFIG_L2CACHE, nvroot, 0);
 153         show_vdev_stats(NULL, ZPOOL_CONFIG_SPARES, nvroot, 0);
 154
 155         nvlist_free(config);
 156 }