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 2013 Nexenta Systems, Inc. All rights reserved.
24 * Copyright (c) 2016 by Delphix. All rights reserved.
25 * Copyright 2017 RackTop Systems.
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 #include <dlfcn.h>
38
39 extern void nicenum(uint64_t num, char *buf, size_t);
40
41 /*
42 * Routines needed by more than one client of libzpool.
43 */
44
45 static void
46 show_vdev_stats(const char *desc, const char *ctype, nvlist_t *nv, int indent)
47 {
48 vdev_stat_t *vs;
49 vdev_stat_t v0 = { 0 };
50 uint64_t sec, ops_rd, ops_wr;
51 uint64_t is_log = 0;
52 nvlist_t **child;
53 uint_t c, children;
54 char used[6], avail[6];
55 char rops[6], wops[6], rbytes[6], wbytes[6], rerr[6], werr[6], cerr[6];
56 char riotime[8], wiotime[8];
57 char *prefix = "";
58
59 if (indent == 0 && desc != NULL) {
60 (void) printf(" "
61 " capacity operations bandwidth --- latency --- "
62 "---- errors ----\n");
63 (void) printf("description "
64 "used avail read write read write read write "
65 "read write cksum\n");
66 }
67
68 if (desc != NULL) {
69 (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_IS_LOG, &is_log);
70
71 if (is_log)
72 prefix = "log ";
73
74 if (nvlist_lookup_uint64_array(nv, ZPOOL_CONFIG_VDEV_STATS,
75 (uint64_t **)&vs, &c) != 0)
76 vs = &v0;
77
78 sec = MAX(1, vs->vs_timestamp / NANOSEC);
79 ops_rd = MAX(1, vs->vs_ops[ZIO_TYPE_READ]);
80 ops_wr = MAX(1, vs->vs_ops[ZIO_TYPE_WRITE]);
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_iotime[ZIO_TYPE_READ] / ops_rd, riotime,
91 sizeof (riotime));
92 nicenum(vs->vs_iotime[ZIO_TYPE_WRITE] / ops_wr, wiotime,
93 sizeof (wiotime));
94 nicenum(vs->vs_read_errors, rerr, sizeof (rerr));
95 nicenum(vs->vs_write_errors, werr, sizeof (werr));
96 nicenum(vs->vs_checksum_errors, cerr, sizeof (cerr));
97
98 (void) printf(
99 "%*s%s%*s%*s%*s %5s %5s %5s %5s %8s %8s %5s %5s %5s\n",
100 indent, "",
101 prefix,
102 indent + strlen(prefix) - 25 - (vs->vs_space ? 0 : 12),
103 desc,
104 vs->vs_space ? 6 : 0, vs->vs_space ? used : "",
105 vs->vs_space ? 6 : 0, vs->vs_space ? avail : "",
106 rops, wops, rbytes, wbytes, riotime, wiotime, rerr, werr,
107 cerr);
108 }
109
110 if (nvlist_lookup_nvlist_array(nv, ctype, &child, &children) != 0)
111 return;
112
113 for (c = 0; c < children; c++) {
114 nvlist_t *cnv = child[c];
115 char *cname, *tname;
116 uint64_t np;
117 if (nvlist_lookup_string(cnv, ZPOOL_CONFIG_PATH, &cname) &&
118 nvlist_lookup_string(cnv, ZPOOL_CONFIG_TYPE, &cname))
119 cname = "<unknown>";
120 tname = calloc(1, strlen(cname) + 2);
121 (void) strcpy(tname, cname);
122 if (nvlist_lookup_uint64(cnv, ZPOOL_CONFIG_NPARITY, &np) == 0)
123 tname[strlen(tname)] = '0' + np;
124 show_vdev_stats(tname, ctype, cnv, indent + 2);
125 free(tname);
126 }
127 }
128
129 void
130 show_pool_stats(spa_t *spa)
131 {
132 nvlist_t *config, *nvroot;
133 char *name;
134
135 VERIFY(spa_get_stats(spa_name(spa), &config, NULL, 0) == 0);
136
137 VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE,
138 &nvroot) == 0);
139 VERIFY(nvlist_lookup_string(config, ZPOOL_CONFIG_POOL_NAME,
140 &name) == 0);
141
142 show_vdev_stats(name, ZPOOL_CONFIG_CHILDREN, nvroot, 0);
143 show_vdev_stats(NULL, ZPOOL_CONFIG_L2CACHE, nvroot, 0);
144 show_vdev_stats(NULL, ZPOOL_CONFIG_SPARES, nvroot, 0);
145
146 nvlist_free(config);
147 }
148
149 /*
150 * Sets given global variable in libzpool to given unsigned 32-bit value.
151 * arg: "<variable>=<value>"
152 */
153 int
154 set_global_var(char *arg)
155 {
156 void *zpoolhdl;
157 char *varname = arg, *varval;
158 u_longlong_t val;
159
160 #ifndef _LITTLE_ENDIAN
161 /*
162 * On big endian systems changing a 64-bit variable would set the high
163 * 32 bits instead of the low 32 bits, which could cause unexpected
164 * results.
165 */
166 fprintf(stderr, "Setting global variables is only supported on "
167 "little-endian systems\n", varname);
168 return (ENOTSUP);
169 #endif
170 if ((varval = strchr(arg, '=')) != NULL) {
171 *varval = '\0';
172 varval++;
173 val = strtoull(varval, NULL, 0);
174 if (val > UINT32_MAX) {
175 fprintf(stderr, "Value for global variable '%s' must "
176 "be a 32-bit unsigned integer\n", varname);
177 return (EOVERFLOW);
178 }
179 } else {
180 return (EINVAL);
181 }
182
183 zpoolhdl = dlopen("libzpool.so", RTLD_LAZY);
184 if (zpoolhdl != NULL) {
185 uint32_t *var;
186 var = dlsym(zpoolhdl, varname);
187 if (var == NULL) {
188 fprintf(stderr, "Global variable '%s' does not exist "
189 "in libzpool.so\n", varname);
190 return (EINVAL);
191 }
192 *var = (uint32_t)val;
193
194 dlclose(zpoolhdl);
195 } else {
196 fprintf(stderr, "Failed to open libzpool.so to set global "
197 "variable\n");
198 return (EIO);
199 }
200
201 return (0);
202 }