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