util.c revision 305233 
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 */
24
25#include <assert.h>
26#include <sys/zfs_context.h>
27#include <sys/avl.h>
28#include <string.h>
29#include <stdio.h>
30#include <stdlib.h>
31#include <sys/spa.h>
32#include <sys/fs/zfs.h>
33#include <sys/refcount.h>
34
35/*
36 * Routines needed by more than one client of libzpool.
37 */
38
39void
40nicenum(uint64_t num, char *buf)
41{
42	uint64_t n = num;
43	int index = 0;
44	char u;
45
46	while (n >= 1024) {
47		n = (n + (1024 / 2)) / 1024; /* Round up or down */
48		index++;
49	}
50
51	u = " KMGTPE"[index];
52
53	if (index == 0) {
54		(void) sprintf(buf, "%llu", (u_longlong_t)n);
55	} else if (n < 10 && (num & (num - 1)) != 0) {
56		(void) sprintf(buf, "%.2f%c",
57		    (double)num / (1ULL << 10 * index), u);
58	} else if (n < 100 && (num & (num - 1)) != 0) {
59		(void) sprintf(buf, "%.1f%c",
60		    (double)num / (1ULL << 10 * index), u);
61	} else {
62		(void) sprintf(buf, "%llu%c", (u_longlong_t)n, u);
63	}
64}
65
66static void
67show_vdev_stats(const char *desc, const char *ctype, nvlist_t *nv, int indent)
68{
69	vdev_stat_t *vs;
70	vdev_stat_t v0 = { 0 };
71	uint64_t sec;
72	uint64_t is_log = 0;
73	nvlist_t **child;
74	uint_t c, children;
75	char used[6], avail[6];
76	char rops[6], wops[6], rbytes[6], wbytes[6], rerr[6], werr[6], cerr[6];
77	char *prefix = "";
78
79	if (indent == 0 && desc != NULL) {
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	if (desc != NULL) {
87		(void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_IS_LOG, &is_log);
88
89		if (is_log)
90			prefix = "log ";
91
92		if (nvlist_lookup_uint64_array(nv, ZPOOL_CONFIG_VDEV_STATS,
93		    (uint64_t **)&vs, &c) != 0)
94			vs = &v0;
95
96		sec = MAX(1, vs->vs_timestamp / NANOSEC);
97
98		nicenum(vs->vs_alloc, used);
99		nicenum(vs->vs_space - vs->vs_alloc, avail);
100		nicenum(vs->vs_ops[ZIO_TYPE_READ] / sec, rops);
101		nicenum(vs->vs_ops[ZIO_TYPE_WRITE] / sec, wops);
102		nicenum(vs->vs_bytes[ZIO_TYPE_READ] / sec, rbytes);
103		nicenum(vs->vs_bytes[ZIO_TYPE_WRITE] / sec, wbytes);
104		nicenum(vs->vs_read_errors, rerr);
105		nicenum(vs->vs_write_errors, werr);
106		nicenum(vs->vs_checksum_errors, cerr);
107
108		(void) printf("%*s%s%*s%*s%*s %5s %5s %5s %5s %5s %5s %5s\n",
109		    indent, "",
110		    prefix,
111		    (int)(indent + strlen(prefix) - 25 - (vs->vs_space ? 0 : 12)),
112		    desc,
113		    vs->vs_space ? 6 : 0, vs->vs_space ? used : "",
114		    vs->vs_space ? 6 : 0, vs->vs_space ? avail : "",
115		    rops, wops, rbytes, wbytes, rerr, werr, cerr);
116	}
117
118	if (nvlist_lookup_nvlist_array(nv, ctype, &child, &children) != 0)
119		return;
120
121	for (c = 0; c < children; c++) {
122		nvlist_t *cnv = child[c];
123		char *cname, *tname;
124		uint64_t np;
125		if (nvlist_lookup_string(cnv, ZPOOL_CONFIG_PATH, &cname) &&
126		    nvlist_lookup_string(cnv, ZPOOL_CONFIG_TYPE, &cname))
127			cname = "<unknown>";
128		tname = calloc(1, strlen(cname) + 2);
129		(void) strcpy(tname, cname);
130		if (nvlist_lookup_uint64(cnv, ZPOOL_CONFIG_NPARITY, &np) == 0)
131			tname[strlen(tname)] = '0' + np;
132		show_vdev_stats(tname, ctype, cnv, indent + 2);
133		free(tname);
134	}
135}
136
137void
138show_pool_stats(spa_t *spa)
139{
140	nvlist_t *config, *nvroot;
141	char *name;
142
143	VERIFY(spa_get_stats(spa_name(spa), &config, NULL, 0) == 0);
144
145	VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE,
146	    &nvroot) == 0);
147	VERIFY(nvlist_lookup_string(config, ZPOOL_CONFIG_POOL_NAME,
148	    &name) == 0);
149
150	show_vdev_stats(name, ZPOOL_CONFIG_CHILDREN, nvroot, 0);
151	show_vdev_stats(NULL, ZPOOL_CONFIG_L2CACHE, nvroot, 0);
152	show_vdev_stats(NULL, ZPOOL_CONFIG_SPARES, nvroot, 0);
153
154	nvlist_free(config);
155}
156