xref: /illumos-gate/usr/src/lib/libzpool/common/util.c (revision fa9e4066f08beec538e775443c5be79dd423fcab)
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, Version 1.0 only
6  * (the "License").  You may not use this file except in compliance
7  * with the License.
8  *
9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10  * or http://www.opensolaris.org/os/licensing.
11  * See the License for the specific language governing permissions
12  * and limitations under the License.
13  *
14  * When distributing Covered Code, include this CDDL HEADER in each
15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16  * If applicable, add the following below this CDDL HEADER, with the
17  * fields enclosed by brackets "[]" replaced with your own identifying
18  * information: Portions Copyright [yyyy] [name of copyright owner]
19  *
20  * CDDL HEADER END
21  */
22 /*
23  * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
24  * Use is subject to license terms.
25  */
26 
27 #pragma ident	"%Z%%M%	%I%	%E% SMI"
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 
38 /*
39  * Routines needed by more than one client of libzpool.
40  */
41 
42 void
43 nicenum(uint64_t num, char *buf)
44 {
45 	uint64_t n = num;
46 	int index = 0;
47 	char u;
48 
49 	while (n >= 1024) {
50 		n = (n + (1024 / 2)) / 1024; /* Round up or down */
51 		index++;
52 	}
53 
54 	u = " KMGTPE"[index];
55 
56 	if (index == 0) {
57 		(void) sprintf(buf, "%llu", (u_longlong_t)n);
58 	} else if (n < 10 && (num & (num - 1)) != 0) {
59 		(void) sprintf(buf, "%.2f%c",
60 		    (double)num / (1ULL << 10 * index), u);
61 	} else if (n < 100 && (num & (num - 1)) != 0) {
62 		(void) sprintf(buf, "%.1f%c",
63 		    (double)num / (1ULL << 10 * index), u);
64 	} else {
65 		(void) sprintf(buf, "%llu%c", (u_longlong_t)n, u);
66 	}
67 }
68 
69 static void
70 show_vdev_stats(const char *desc, nvlist_t *nv, int indent)
71 {
72 	nvlist_t **child;
73 	uint_t c, children;
74 	vdev_stat_t *vs;
75 	uint64_t sec;
76 	char used[6], avail[6];
77 	char rops[6], wops[6], rbytes[6], wbytes[6], rerr[6], werr[6], cerr[6];
78 
79 	if (indent == 0) {
80 		(void) printf("                     "
81 		    " capacity   operations   bandwidth  ---- errors ----\n");
82 		(void) printf("description          "
83 		    "used avail  read write  read write  read write cksum\n");
84 	}
85 
86 	VERIFY(nvlist_lookup_uint64_array(nv, ZPOOL_CONFIG_STATS,
87 	    (uint64_t **)&vs, &c) == 0);
88 
89 	sec = MAX(1, vs->vs_timestamp / NANOSEC);
90 
91 	nicenum(vs->vs_alloc, used);
92 	nicenum(vs->vs_space - vs->vs_alloc, avail);
93 	nicenum(vs->vs_ops[ZIO_TYPE_READ] / sec, rops);
94 	nicenum(vs->vs_ops[ZIO_TYPE_WRITE] / sec, wops);
95 	nicenum(vs->vs_bytes[ZIO_TYPE_READ] / sec, rbytes);
96 	nicenum(vs->vs_bytes[ZIO_TYPE_WRITE] / sec, wbytes);
97 	nicenum(vs->vs_read_errors, rerr);
98 	nicenum(vs->vs_write_errors, werr);
99 	nicenum(vs->vs_checksum_errors, cerr);
100 
101 	(void) printf("%*s%*s%*s%*s %5s %5s %5s %5s %5s %5s %5s\n",
102 	    indent, "",
103 	    indent - 19 - (vs->vs_space ? 0 : 12), 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, rerr, werr, cerr);
107 
108 	if (nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_CHILDREN,
109 	    &child, &children) != 0)
110 		return;
111 
112 	for (c = 0; c < children; c++) {
113 		nvlist_t *cnv = child[c];
114 		char *cname;
115 		if (nvlist_lookup_string(cnv, ZPOOL_CONFIG_PATH, &cname) &&
116 		    nvlist_lookup_string(cnv, ZPOOL_CONFIG_TYPE, &cname))
117 			cname = "<unknown>";
118 		show_vdev_stats(cname, cnv, indent + 2);
119 	}
120 }
121 
122 void
123 show_pool_stats(spa_t *spa)
124 {
125 	nvlist_t *config = NULL;
126 	nvlist_t *nvroot = NULL;
127 
128 	spa_config_enter(spa, RW_READER);
129 	VERIFY(spa_get_stats(spa_name(spa), &config) == 0);
130 	VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE,
131 	    &nvroot) == 0);
132 
133 	show_vdev_stats(spa_name(spa), nvroot, 0);
134 	spa_config_exit(spa);
135 }
136