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 /*
23 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Copyright 2020 Joyent, Inc.
25 */
26
27 #include <stdio.h>
28 #include <stdlib.h>
29 #include <string.h>
30 #include <sys/nvpair.h>
31 #include <sys/fs/zfs.h>
32 #include <sys/sysmacros.h>
33 #include <unistd.h>
34
35 #include <libzutil.h>
36
37 static void
dump_ddt_stat(const ddt_stat_t * dds,int h)38 dump_ddt_stat(const ddt_stat_t *dds, int h)
39 {
40 char refcnt[6];
41 char blocks[6], lsize[6], psize[6], dsize[6];
42 char ref_blocks[6], ref_lsize[6], ref_psize[6], ref_dsize[6];
43
44 if (dds == NULL || dds->dds_blocks == 0)
45 return;
46
47 if (h == -1)
48 (void) strcpy(refcnt, "Total");
49 else
50 zfs_nicenum(1ULL << h, refcnt, sizeof (refcnt));
51
52 zfs_nicenum(dds->dds_blocks, blocks, sizeof (blocks));
53 zfs_nicebytes(dds->dds_lsize, lsize, sizeof (lsize));
54 zfs_nicebytes(dds->dds_psize, psize, sizeof (psize));
55 zfs_nicebytes(dds->dds_dsize, dsize, sizeof (dsize));
56 zfs_nicenum(dds->dds_ref_blocks, ref_blocks, sizeof (ref_blocks));
57 zfs_nicebytes(dds->dds_ref_lsize, ref_lsize, sizeof (ref_lsize));
58 zfs_nicebytes(dds->dds_ref_psize, ref_psize, sizeof (ref_psize));
59 zfs_nicebytes(dds->dds_ref_dsize, ref_dsize, sizeof (ref_dsize));
60
61 (void) printf("%6s %6s %5s %5s %5s %6s %5s %5s %5s\n",
62 refcnt,
63 blocks, lsize, psize, dsize,
64 ref_blocks, ref_lsize, ref_psize, ref_dsize);
65 }
66
67 /*
68 * Print the DDT histogram and the column totals.
69 */
70 void
zpool_dump_ddt(const ddt_stat_t * dds_total,const ddt_histogram_t * ddh)71 zpool_dump_ddt(const ddt_stat_t *dds_total, const ddt_histogram_t *ddh)
72 {
73 int h;
74
75 (void) printf("\n");
76
77 (void) printf("bucket "
78 " allocated "
79 " referenced \n");
80 (void) printf("______ "
81 "______________________________ "
82 "______________________________\n");
83
84 (void) printf("%6s %6s %5s %5s %5s %6s %5s %5s %5s\n",
85 "refcnt",
86 "blocks", "LSIZE", "PSIZE", "DSIZE",
87 "blocks", "LSIZE", "PSIZE", "DSIZE");
88
89 (void) printf("%6s %6s %5s %5s %5s %6s %5s %5s %5s\n",
90 "------",
91 "------", "-----", "-----", "-----",
92 "------", "-----", "-----", "-----");
93
94 for (h = 0; h < 64; h++)
95 dump_ddt_stat(&ddh->ddh_stat[h], h);
96
97 dump_ddt_stat(dds_total, -1);
98
99 (void) printf("\n");
100 }
101
102 /*
103 * Process the buffer of nvlists, unpacking and storing each nvlist record
104 * into 'records'. 'leftover' is set to the number of bytes that weren't
105 * processed as there wasn't a complete record.
106 */
107 int
zpool_history_unpack(char * buf,uint64_t bytes_read,uint64_t * leftover,nvlist_t *** records,uint_t * numrecords)108 zpool_history_unpack(char *buf, uint64_t bytes_read, uint64_t *leftover,
109 nvlist_t ***records, uint_t *numrecords)
110 {
111 uint64_t reclen;
112 nvlist_t *nv;
113 int i;
114 void *tmp;
115
116 while (bytes_read > sizeof (reclen)) {
117
118 /* get length of packed record (stored as little endian) */
119 for (i = 0, reclen = 0; i < sizeof (reclen); i++)
120 reclen += (uint64_t)(((uchar_t *)buf)[i]) << (8*i);
121
122 if (bytes_read < sizeof (reclen) + reclen)
123 break;
124
125 /* unpack record */
126 if (nvlist_unpack(buf + sizeof (reclen), reclen, &nv, 0) != 0)
127 return (ENOMEM);
128 bytes_read -= sizeof (reclen) + reclen;
129 buf += sizeof (reclen) + reclen;
130
131 /* add record to nvlist array */
132 (*numrecords)++;
133 if (ISP2(*numrecords + 1)) {
134 tmp = realloc(*records,
135 *numrecords * 2 * sizeof (nvlist_t *));
136 if (tmp == NULL) {
137 nvlist_free(nv);
138 (*numrecords)--;
139 return (ENOMEM);
140 }
141 *records = tmp;
142 }
143 (*records)[*numrecords - 1] = nv;
144 }
145
146 *leftover = bytes_read;
147 return (0);
148 }
149
150 ulong_t
get_system_hostid(void)151 get_system_hostid(void)
152 {
153 char *env;
154
155 /*
156 * Allow the hostid to be subverted for testing.
157 */
158 env = getenv("ZFS_HOSTID");
159 if (env) {
160 ulong_t hostid = strtoull(env, NULL, 16);
161 return (hostid & 0xFFFFFFFF);
162 }
163
164 return (gethostid());
165 }
166