1 // SPDX-License-Identifier: CDDL-1.0
2 /*
3 * CDDL HEADER START
4 *
5 * This file and its contents are supplied under the terms of the
6 * Common Development and Distribution License ("CDDL"), version 1.0.
7 * You may only use this file in accordance with the terms of version
8 * 1.0 of the CDDL.
9 *
10 * A full copy of the text of the CDDL should have accompanied this
11 * source. A copy of the CDDL is also available via the Internet at
12 * http://www.illumos.org/license/CDDL.
13 *
14 * CDDL HEADER END
15 */
16
17 /*
18 * Copyright (c) 2020 by Delphix. All rights reserved.
19 */
20
21 #include <assert.h>
22 #include <fcntl.h>
23 #include <stdio.h>
24 #include <libzfs.h>
25 #include <sys/zfs_ioctl.h>
26 #include <sys/nvpair.h>
27 #include <sys/fm/protocol.h>
28 #include <sys/fm/fs/zfs.h>
29
30 /*
31 * Command to output io and checksum ereport values, one per line.
32 * Used by zpool_events_duplicates.ksh to check for duplicate events.
33 *
34 * example output line:
35 *
36 * checksum "error_pool" 0x856dd01ce52e336 0x000034 0x000400 0x000a402c00
37 * 0x000004 0x000000 0x000000 0x000000 0x000001
38 */
39
40 /*
41 * Our ereport duplicate criteria
42 *
43 * When the class and all of these values match, then an ereport is
44 * considered to be a duplicate.
45 */
46 static const char *const criteria_name[] = {
47 FM_EREPORT_PAYLOAD_ZFS_POOL,
48 FM_EREPORT_PAYLOAD_ZFS_VDEV_GUID,
49 FM_EREPORT_PAYLOAD_ZFS_ZIO_ERR,
50 FM_EREPORT_PAYLOAD_ZFS_ZIO_SIZE,
51 FM_EREPORT_PAYLOAD_ZFS_ZIO_OFFSET,
52 FM_EREPORT_PAYLOAD_ZFS_ZIO_PRIORITY,
53
54 /* logical zio criteriai (optional) */
55 FM_EREPORT_PAYLOAD_ZFS_ZIO_OBJSET,
56 FM_EREPORT_PAYLOAD_ZFS_ZIO_OBJECT,
57 FM_EREPORT_PAYLOAD_ZFS_ZIO_BLKID,
58 FM_EREPORT_PAYLOAD_ZFS_ZIO_LEVEL,
59 };
60
61 #define CRITERIA_NAMES_COUNT ARRAY_SIZE(criteria_name)
62
63 static void
print_ereport_line(nvlist_t * nvl)64 print_ereport_line(nvlist_t *nvl)
65 {
66 const char *class;
67 int last = CRITERIA_NAMES_COUNT - 1;
68
69 /*
70 * For the test case context, we only want to see 'io' and
71 * 'checksum' subclass. We skip 'data' to minimize the output.
72 */
73 if (nvlist_lookup_string(nvl, FM_CLASS, &class) != 0 ||
74 strstr(class, "ereport.fs.zfs.") == NULL ||
75 strcmp(class, "ereport.fs.zfs.data") == 0) {
76 return;
77 }
78
79 (void) printf("%s\t", class + strlen("ereport.fs.zfs."));
80
81 for (int i = 0; i < CRITERIA_NAMES_COUNT; i++) {
82 nvpair_t *nvp;
83 uint32_t i32 = 0;
84 uint64_t i64 = 0;
85 const char *str = NULL;
86
87 if (nvlist_lookup_nvpair(nvl, criteria_name[i], &nvp) != 0) {
88 /* print a proxy for optional criteria */
89 (void) printf("--------");
90 (void) printf("%c", i == last ? '\n' : '\t');
91 continue;
92 }
93
94 switch (nvpair_type(nvp)) {
95 case DATA_TYPE_STRING:
96 (void) nvpair_value_string(nvp, &str);
97 (void) printf("\"%s\"", str ? str : "<NULL>");
98 break;
99
100 case DATA_TYPE_INT32:
101 (void) nvpair_value_int32(nvp, (void *)&i32);
102 (void) printf("0x%06x", i32);
103 break;
104
105 case DATA_TYPE_UINT32:
106 (void) nvpair_value_uint32(nvp, &i32);
107 (void) printf("0x%06x", i32);
108 break;
109
110 case DATA_TYPE_INT64:
111 (void) nvpair_value_int64(nvp, (void *)&i64);
112 (void) printf("0x%06llx", (u_longlong_t)i64);
113 break;
114
115 case DATA_TYPE_UINT64:
116 (void) nvpair_value_uint64(nvp, &i64);
117 if (strcmp(FM_EREPORT_PAYLOAD_ZFS_ZIO_OFFSET,
118 criteria_name[i]) == 0)
119 (void) printf("0x%010llx", (u_longlong_t)i64);
120 else
121 (void) printf("0x%06llx", (u_longlong_t)i64);
122 break;
123 default:
124 (void) printf("<unknown>");
125 break;
126 }
127 (void) printf("%c", i == last ? '\n' : '\t');
128 }
129 }
130
131 static void
ereports_dump(libzfs_handle_t * zhdl,int zevent_fd)132 ereports_dump(libzfs_handle_t *zhdl, int zevent_fd)
133 {
134 nvlist_t *nvl;
135 int ret, dropped;
136
137 while (1) {
138 ret = zpool_events_next(zhdl, &nvl, &dropped, ZEVENT_NONBLOCK,
139 zevent_fd);
140 if (ret || nvl == NULL)
141 break;
142 if (dropped > 0)
143 (void) fprintf(stdout, "dropped %d events\n", dropped);
144 print_ereport_line(nvl);
145 (void) fflush(stdout);
146 nvlist_free(nvl);
147 }
148 }
149
150 int
main(void)151 main(void)
152 {
153 libzfs_handle_t *hdl;
154 int fd;
155
156 hdl = libzfs_init();
157 if (hdl == NULL) {
158 (void) fprintf(stderr, "libzfs_init: %s\n", strerror(errno));
159 exit(2);
160 }
161 fd = open(ZFS_DEV, O_RDWR);
162 if (fd < 0) {
163 (void) fprintf(stderr, "open: %s\n", strerror(errno));
164 libzfs_fini(hdl);
165 exit(2);
166 }
167
168 ereports_dump(hdl, fd);
169
170 (void) close(fd);
171 libzfs_fini(hdl);
172
173 return (0);
174 }
175