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