]> CyberLeo.Net >> Repos - FreeBSD/stable/10.git/blob - cddl/contrib/opensolaris/lib/libzpool/common/util.c
MFC r324220:
[FreeBSD/stable/10.git] / 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  */
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                     (int)(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 }