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 2017 RackTop Systems. 25 * Copyright (c) 2017, Intel Corporation. 26 * Copyright 2020 Joyent, Inc. 27 */ 28 29 #include <assert.h> 30 #include <sys/zfs_context.h> 31 #include <sys/avl.h> 32 #include <string.h> 33 #include <stdio.h> 34 #include <stdlib.h> 35 #include <sys/spa.h> 36 #include <sys/fs/zfs.h> 37 #include <sys/refcount.h> 38 #include <sys/zfs_ioctl.h> 39 #include <dlfcn.h> 40 #include <libzutil.h> 41 42 extern void nicenum(uint64_t num, char *buf, size_t); 43 44 /* 45 * Routines needed by more than one client of libzpool. 46 */ 47 48 static void 49 show_vdev_stats(const char *desc, const char *ctype, nvlist_t *nv, int indent) 50 { 51 vdev_stat_t *vs; 52 vdev_stat_t *v0 = { 0 }; 53 uint64_t sec; 54 uint64_t is_log = 0; 55 nvlist_t **child; 56 uint_t c, children; 57 char used[6], avail[6]; 58 char rops[6], wops[6], rbytes[6], wbytes[6], rerr[6], werr[6], cerr[6]; 59 60 v0 = umem_zalloc(sizeof (*v0), UMEM_NOFAIL); 61 62 if (indent == 0 && desc != NULL) { 63 (void) printf(" " 64 " capacity operations bandwidth ---- errors ----\n"); 65 (void) printf("description " 66 "used avail read write read write read write cksum\n"); 67 } 68 69 if (desc != NULL) { 70 char *suffix = "", *bias = NULL; 71 char bias_suffix[32]; 72 73 (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_IS_LOG, &is_log); 74 (void) nvlist_lookup_string(nv, ZPOOL_CONFIG_ALLOCATION_BIAS, 75 &bias); 76 if (nvlist_lookup_uint64_array(nv, ZPOOL_CONFIG_VDEV_STATS, 77 (uint64_t **)&vs, &c) != 0) 78 vs = v0; 79 80 if (bias != NULL) { 81 (void) snprintf(bias_suffix, sizeof (bias_suffix), 82 " (%s)", bias); 83 suffix = bias_suffix; 84 } else if (is_log) { 85 suffix = " (log)"; 86 } 87 88 sec = MAX(1, vs->vs_timestamp / NANOSEC); 89 90 nicenum(vs->vs_alloc, used, sizeof (used)); 91 nicenum(vs->vs_space - vs->vs_alloc, avail, sizeof (avail)); 92 nicenum(vs->vs_ops[ZIO_TYPE_READ] / sec, rops, sizeof (rops)); 93 nicenum(vs->vs_ops[ZIO_TYPE_WRITE] / sec, wops, sizeof (wops)); 94 nicenum(vs->vs_bytes[ZIO_TYPE_READ] / sec, rbytes, 95 sizeof (rbytes)); 96 nicenum(vs->vs_bytes[ZIO_TYPE_WRITE] / sec, wbytes, 97 sizeof (wbytes)); 98 nicenum(vs->vs_read_errors, rerr, sizeof (rerr)); 99 nicenum(vs->vs_write_errors, werr, sizeof (werr)); 100 nicenum(vs->vs_checksum_errors, cerr, sizeof (cerr)); 101 102 (void) printf("%*s%s%*s%*s%*s %5s %5s %5s %5s %5s %5s %5s\n", 103 indent, "", 104 desc, 105 (int)(indent+strlen(desc)-25-(vs->vs_space ? 0 : 12)), 106 suffix, 107 vs->vs_space ? 6 : 0, vs->vs_space ? used : "", 108 vs->vs_space ? 6 : 0, vs->vs_space ? avail : "", 109 rops, wops, rbytes, wbytes, rerr, werr, cerr); 110 } 111 umem_free(v0, sizeof (*v0)); 112 113 if (nvlist_lookup_nvlist_array(nv, ctype, &child, &children) != 0) 114 return; 115 116 for (c = 0; c < children; c++) { 117 nvlist_t *cnv = child[c]; 118 char *cname, *tname; 119 uint64_t np; 120 if (nvlist_lookup_string(cnv, ZPOOL_CONFIG_PATH, &cname) && 121 nvlist_lookup_string(cnv, ZPOOL_CONFIG_TYPE, &cname)) 122 cname = "<unknown>"; 123 tname = calloc(1, strlen(cname) + 2); 124 (void) strcpy(tname, cname); 125 if (nvlist_lookup_uint64(cnv, ZPOOL_CONFIG_NPARITY, &np) == 0) 126 tname[strlen(tname)] = '0' + np; 127 show_vdev_stats(tname, ctype, cnv, indent + 2); 128 free(tname); 129 } 130 } 131 132 void 133 show_pool_stats(spa_t *spa) 134 { 135 nvlist_t *config, *nvroot; 136 char *name; 137 138 VERIFY(spa_get_stats(spa_name(spa), &config, NULL, 0) == 0); 139 140 VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, 141 &nvroot) == 0); 142 VERIFY(nvlist_lookup_string(config, ZPOOL_CONFIG_POOL_NAME, 143 &name) == 0); 144 145 show_vdev_stats(name, ZPOOL_CONFIG_CHILDREN, nvroot, 0); 146 show_vdev_stats(NULL, ZPOOL_CONFIG_L2CACHE, nvroot, 0); 147 show_vdev_stats(NULL, ZPOOL_CONFIG_SPARES, nvroot, 0); 148 149 nvlist_free(config); 150 } 151 152 /* 153 * Sets given global variable in libzpool to given unsigned 32-bit value. 154 * arg: "<variable>=<value>" 155 */ 156 int 157 set_global_var(char *arg) 158 { 159 void *zpoolhdl; 160 char *varname = arg, *varval; 161 u_longlong_t val; 162 163 #ifndef _LITTLE_ENDIAN 164 /* 165 * On big endian systems changing a 64-bit variable would set the high 166 * 32 bits instead of the low 32 bits, which could cause unexpected 167 * results. 168 */ 169 fprintf(stderr, "Setting global variables is only supported on " 170 "little-endian systems\n", varname); 171 return (ENOTSUP); 172 #endif 173 if ((varval = strchr(arg, '=')) != NULL) { 174 *varval = '\0'; 175 varval++; 176 val = strtoull(varval, NULL, 0); 177 if (val > UINT32_MAX) { 178 fprintf(stderr, "Value for global variable '%s' must " 179 "be a 32-bit unsigned integer\n", varname); 180 return (EOVERFLOW); 181 } 182 } else { 183 return (EINVAL); 184 } 185 186 zpoolhdl = dlopen("libzpool.so", RTLD_LAZY); 187 if (zpoolhdl != NULL) { 188 uint32_t *var; 189 var = dlsym(zpoolhdl, varname); 190 if (var == NULL) { 191 fprintf(stderr, "Global variable '%s' does not exist " 192 "in libzpool.so\n", varname); 193 return (EINVAL); 194 } 195 *var = (uint32_t)val; 196 197 dlclose(zpoolhdl); 198 } else { 199 fprintf(stderr, "Failed to open libzpool.so to set global " 200 "variable\n"); 201 return (EIO); 202 } 203 204 return (0); 205 } 206 207 static nvlist_t * 208 refresh_config(void *unused, nvlist_t *tryconfig) 209 { 210 return (spa_tryimport(tryconfig)); 211 } 212 213 static int 214 pool_active(void *unused, const char *name, uint64_t guid, 215 boolean_t *isactive) 216 { 217 zfs_cmd_t *zcp; 218 nvlist_t *innvl; 219 char *packed = NULL; 220 size_t size = 0; 221 int fd, ret; 222 223 /* 224 * Use ZFS_IOC_POOL_SYNC to confirm if a pool is active 225 */ 226 227 fd = open("/dev/zfs", O_RDWR); 228 if (fd < 0) 229 return (-1); 230 231 zcp = umem_zalloc(sizeof (zfs_cmd_t), UMEM_NOFAIL); 232 233 innvl = fnvlist_alloc(); 234 fnvlist_add_boolean_value(innvl, "force", B_FALSE); 235 236 (void) strlcpy(zcp->zc_name, name, sizeof (zcp->zc_name)); 237 packed = fnvlist_pack(innvl, &size); 238 zcp->zc_nvlist_src = (uint64_t)(uintptr_t)packed; 239 zcp->zc_nvlist_src_size = size; 240 241 ret = ioctl(fd, ZFS_IOC_POOL_SYNC, zcp); 242 243 fnvlist_pack_free(packed, size); 244 free((void *)(uintptr_t)zcp->zc_nvlist_dst); 245 nvlist_free(innvl); 246 umem_free(zcp, sizeof (zfs_cmd_t)); 247 248 (void) close(fd); 249 250 *isactive = (ret == 0); 251 252 return (0); 253 } 254 255 const pool_config_ops_t libzpool_config_ops = { 256 .pco_refresh_config = refresh_config, 257 .pco_pool_active = pool_active, 258 }; 259