cddl/contrib/opensolaris/lib/libzpool/common/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 (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
  23  * Copyright (c) 2016 by Delphix. All rights reserved.
  24  * Copyright (c) 2017, Intel Corporation.
  25  */
  26
  27 #include <assert.h>
  28 #include <sys/zfs_context.h>
  29 #include <sys/avl.h>
  30 #include <string.h>
  31 #include <stdio.h>
  32 #include <stdlib.h>
  33 #include <sys/spa.h>
  34 #include <sys/fs/zfs.h>
  35 #include <sys/refcount.h>
  36 #include <dlfcn.h>
  37
  38 /*
  39  * Routines needed by more than one client of libzpool.
  40  */
  41
  42 static void
  43 show_vdev_stats(const char *desc, const char *ctype, nvlist_t *nv, int indent)
  44 {
  45         vdev_stat_t *vs;
  46         vdev_stat_t v0 = { 0 };
  47         uint64_t sec;
  48         uint64_t is_log = 0;
  49         nvlist_t **child;
  50         uint_t c, children;
  51         char used[6], avail[6];
  52         char rops[6], wops[6], rbytes[6], wbytes[6], rerr[6], werr[6], cerr[6];
  53
  54         if (indent == 0 && desc != NULL) {
  55                 (void) printf("                           "
  56                     " capacity   operations   bandwidth  ---- errors ----\n");
  57                 (void) printf("description                "
  58                     "used avail  read write  read write  read write cksum\n");
  59         }
  60
  61         if (desc != NULL) {
  62                 char *suffix = "", *bias = NULL;
  63                 char bias_suffix[32];
  64
  65                 (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_IS_LOG, &is_log);
  66                 (void) nvlist_lookup_string(nv, ZPOOL_CONFIG_ALLOCATION_BIAS,
  67                     &bias);
  68                 if (nvlist_lookup_uint64_array(nv, ZPOOL_CONFIG_VDEV_STATS,
  69                     (uint64_t **)&vs, &c) != 0)
  70                         vs = &v0;
  71
  72                 if (bias != NULL) {
  73                         (void) snprintf(bias_suffix, sizeof (bias_suffix),
  74                             " (%s)", bias);
  75                         suffix = bias_suffix;
  76                 } else if (is_log) {
  77                         suffix = " (log)";
  78                 }
  79
  80                 sec = MAX(1, vs->vs_timestamp / NANOSEC);
  81
  82                 nicenum(vs->vs_alloc, used, sizeof (used));
  83                 nicenum(vs->vs_space - vs->vs_alloc, avail, sizeof (avail));
  84                 nicenum(vs->vs_ops[ZIO_TYPE_READ] / sec, rops, sizeof (rops));
  85                 nicenum(vs->vs_ops[ZIO_TYPE_WRITE] / sec, wops, sizeof (wops));
  86                 nicenum(vs->vs_bytes[ZIO_TYPE_READ] / sec, rbytes,
  87                     sizeof (rbytes));
  88                 nicenum(vs->vs_bytes[ZIO_TYPE_WRITE] / sec, wbytes,
  89                     sizeof (wbytes));
  90                 nicenum(vs->vs_read_errors, rerr, sizeof (rerr));
  91                 nicenum(vs->vs_write_errors, werr, sizeof (werr));
  92                 nicenum(vs->vs_checksum_errors, cerr, sizeof (cerr));
  93
  94                 (void) printf("%*s%s%*s%*s%*s %5s %5s %5s %5s %5s %5s %5s\n",
  95                     indent, "",
  96                     desc,
  97                     (int)(indent+strlen(desc)-25-(vs->vs_space ? 0 : 12)),
  98                     suffix,
  99                     vs->vs_space ? 6 : 0, vs->vs_space ? used : "",
 100                     vs->vs_space ? 6 : 0, vs->vs_space ? avail : "",
 101                     rops, wops, rbytes, wbytes, rerr, werr, cerr);
 102         }
 103
 104         if (nvlist_lookup_nvlist_array(nv, ctype, &child, &children) != 0)
 105                 return;
 106
 107         for (c = 0; c < children; c++) {
 108                 nvlist_t *cnv = child[c];
 109                 char *cname, *tname;
 110                 uint64_t np;
 111                 if (nvlist_lookup_string(cnv, ZPOOL_CONFIG_PATH, &cname) &&
 112                     nvlist_lookup_string(cnv, ZPOOL_CONFIG_TYPE, &cname))
 113                         cname = "<unknown>";
 114                 tname = calloc(1, strlen(cname) + 2);
 115                 (void) strcpy(tname, cname);
 116                 if (nvlist_lookup_uint64(cnv, ZPOOL_CONFIG_NPARITY, &np) == 0)
 117                         tname[strlen(tname)] = '0' + np;
 118                 show_vdev_stats(tname, ctype, cnv, indent + 2);
 119                 free(tname);
 120         }
 121 }
 122
 123 void
 124 show_pool_stats(spa_t *spa)
 125 {
 126         nvlist_t *config, *nvroot;
 127         char *name;
 128
 129         VERIFY(spa_get_stats(spa_name(spa), &config, NULL, 0) == 0);
 130
 131         VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE,
 132             &nvroot) == 0);
 133         VERIFY(nvlist_lookup_string(config, ZPOOL_CONFIG_POOL_NAME,
 134             &name) == 0);
 135
 136         show_vdev_stats(name, ZPOOL_CONFIG_CHILDREN, nvroot, 0);
 137         show_vdev_stats(NULL, ZPOOL_CONFIG_L2CACHE, nvroot, 0);
 138         show_vdev_stats(NULL, ZPOOL_CONFIG_SPARES, nvroot, 0);
 139
 140         nvlist_free(config);
 141 }
 142
 143 /*
 144  * Sets given global variable in libzpool to given unsigned 32-bit value.
 145  * arg: "<variable>=<value>"
 146  */
 147 int
 148 set_global_var(char *arg)
 149 {
 150         void *zpoolhdl;
 151         char *varname = arg, *varval;
 152         u_longlong_t val;
 153
 154 #ifndef _LITTLE_ENDIAN
 155         /*
 156          * On big endian systems changing a 64-bit variable would set the high
 157          * 32 bits instead of the low 32 bits, which could cause unexpected
 158          * results.
 159          */
 160         fprintf(stderr, "Setting global variables is only supported on "
 161             "little-endian systems\n", varname);
 162         return (ENOTSUP);
 163 #endif
 164         if ((varval = strchr(arg, '=')) != NULL) {
 165                 *varval = '\0';
 166                 varval++;
 167                 val = strtoull(varval, NULL, 0);
 168                 if (val > UINT32_MAX) {
 169                         fprintf(stderr, "Value for global variable '%s' must "
 170                             "be a 32-bit unsigned integer\n", varname);
 171                         return (EOVERFLOW);
 172                 }
 173         } else {
 174                 return (EINVAL);
 175         }
 176
 177         zpoolhdl = dlopen("libzpool.so", RTLD_LAZY);
 178         if (zpoolhdl != NULL) {
 179                 uint32_t *var;
 180                 var = dlsym(zpoolhdl, varname);
 181                 if (var == NULL) {
 182                         fprintf(stderr, "Global variable '%s' does not exist "
 183                             "in libzpool.so\n", varname);
 184                         return (EINVAL);
 185                 }
 186                 *var = (uint32_t)val;
 187
 188                 dlclose(zpoolhdl);
 189         } else {
 190                 fprintf(stderr, "Failed to open libzpool.so to set global "
 191                     "variable\n");
 192                 return (EIO);
 193         }
 194
 195         return (0);
 196 }