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