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.
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.
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]
22 * Copyright (c) 2006, 2010, Oracle and/or its affiliates. All rights reserved.
27 #include <sys/zfs_context.h>
37 #include <sys/mntent.h>
38 #include <sys/mnttab.h>
39 #include <sys/param.h>
43 #include <sys/dmu_objset.h>
44 #include <sys/dnode.h>
45 #include <sys/vdev_impl.h>
49 extern void kernel_init(int);
50 extern void kernel_fini(void);
55 ziprintf(const char *fmt, ...)
63 (void) vprintf(fmt, ap);
68 compress_slashes(const char *src, char *dest)
70 while (*src != '\0') {
72 while (*dest == '/' && *src == '/')
80 * Given a full path to a file, translate into a dataset name and a relative
81 * path within the dataset. 'dataset' must be at least MAXNAMELEN characters,
82 * and 'relpath' must be at least MAXPATHLEN characters. We also pass a stat64
83 * buffer, which we need later to get the object ID.
86 parse_pathname(const char *inpath, char *dataset, char *relpath,
87 struct stat64 *statbuf)
91 char fullpath[MAXPATHLEN];
93 compress_slashes(inpath, fullpath);
95 if (fullpath[0] != '/') {
96 (void) fprintf(stderr, "invalid object '%s': must be full "
102 if (strlen(fullpath) >= MAXPATHLEN) {
103 (void) fprintf(stderr, "invalid object; pathname too long\n");
107 if (stat64(fullpath, statbuf) != 0) {
108 (void) fprintf(stderr, "cannot open '%s': %s\n",
109 fullpath, strerror(errno));
113 if (statfs(fullpath, &sfs) == -1) {
114 (void) fprintf(stderr, "cannot find mountpoint for '%s': %s\n",
115 fullpath, strerror(errno));
119 if (strcmp(sfs.f_fstypename, MNTTYPE_ZFS) != 0) {
120 (void) fprintf(stderr, "invalid path '%s': not a ZFS "
121 "filesystem\n", fullpath);
125 if (strncmp(fullpath, sfs.f_mntonname, strlen(sfs.f_mntonname)) != 0) {
126 (void) fprintf(stderr, "invalid path '%s': mountpoint "
127 "doesn't match path\n", fullpath);
131 (void) strcpy(dataset, sfs.f_mntfromname);
133 rel = fullpath + strlen(sfs.f_mntonname);
136 (void) strcpy(relpath, rel);
142 * Convert from a (dataset, path) pair into a (objset, object) pair. Note that
143 * we grab the object number from the inode number, since looking this up via
144 * libzpool is a real pain.
148 object_from_path(const char *dataset, const char *path, struct stat64 *statbuf,
149 zinject_record_t *record)
155 * Before doing any libzpool operations, call sync() to ensure that the
156 * on-disk state is consistent with the in-core state.
160 err = dmu_objset_own(dataset, DMU_OST_ZFS, B_TRUE, FTAG, &os);
162 (void) fprintf(stderr, "cannot open dataset '%s': %s\n",
163 dataset, strerror(err));
167 record->zi_objset = dmu_objset_id(os);
168 record->zi_object = statbuf->st_ino;
170 dmu_objset_disown(os, FTAG);
176 * Calculate the real range based on the type, level, and range given.
179 calculate_range(const char *dataset, err_type_t type, int level, char *range,
180 zinject_record_t *record)
188 * Determine the numeric range from the string.
192 * If range is unspecified, set the range to [0,-1], which
193 * indicates that the whole object should be treated as an
196 record->zi_start = 0;
197 record->zi_end = -1ULL;
201 /* XXX add support for suffixes */
202 record->zi_start = strtoull(range, &end, 10);
206 record->zi_end = record->zi_start + 1;
207 else if (*end == ',')
208 record->zi_end = strtoull(end + 1, &end, 10);
211 (void) fprintf(stderr, "invalid range '%s': must be "
212 "a numeric range of the form 'start[,end]'\n",
224 * If this is a request to inject faults into the dnode, then we
225 * must translate the current (objset,object) pair into an
226 * offset within the metadnode for the objset. Specifying any
227 * kind of range with type 'dnode' is illegal.
230 (void) fprintf(stderr, "range cannot be specified when "
231 "type is 'dnode'\n");
235 record->zi_start = record->zi_object * sizeof (dnode_phys_t);
236 record->zi_end = record->zi_start + sizeof (dnode_phys_t);
237 record->zi_object = 0;
242 * Get the dnode associated with object, so we can calculate the block
245 if ((err = dmu_objset_own(dataset, DMU_OST_ANY,
246 B_TRUE, FTAG, &os)) != 0) {
247 (void) fprintf(stderr, "cannot open dataset '%s': %s\n",
248 dataset, strerror(err));
252 if (record->zi_object == 0) {
253 dn = DMU_META_DNODE(os);
255 err = dnode_hold(os, record->zi_object, FTAG, &dn);
257 (void) fprintf(stderr, "failed to hold dnode "
259 (u_longlong_t)record->zi_object);
265 ziprintf("data shift: %d\n", (int)dn->dn_datablkshift);
266 ziprintf(" ind shift: %d\n", (int)dn->dn_indblkshift);
269 * Translate range into block IDs.
271 if (record->zi_start != 0 || record->zi_end != -1ULL) {
272 record->zi_start >>= dn->dn_datablkshift;
273 record->zi_end >>= dn->dn_datablkshift;
277 * Check level, and then translate level 0 blkids into ranges
278 * appropriate for level of indirection.
280 record->zi_level = level;
282 ziprintf("level 0 blkid range: [%llu, %llu]\n",
283 record->zi_start, record->zi_end);
285 if (level >= dn->dn_nlevels) {
286 (void) fprintf(stderr, "level %d exceeds max level "
287 "of object (%d)\n", level, dn->dn_nlevels - 1);
291 if (record->zi_start != 0 || record->zi_end != 0) {
292 int shift = dn->dn_indblkshift - SPA_BLKPTRSHIFT;
294 for (; level > 0; level--) {
295 record->zi_start >>= shift;
296 record->zi_end >>= shift;
304 if (dn != DMU_META_DNODE(os))
305 dnode_rele(dn, FTAG);
308 dmu_objset_disown(os, FTAG);
314 translate_record(err_type_t type, const char *object, const char *range,
315 int level, zinject_record_t *record, char *poolname, char *dataset)
317 char path[MAXPATHLEN];
319 struct stat64 statbuf;
324 debug = (getenv("ZINJECT_DEBUG") != NULL);
326 ziprintf("translating: %s\n", object);
328 if (MOS_TYPE(type)) {
330 * MOS objects are treated specially.
337 record->zi_type = DMU_OT_OBJECT_DIRECTORY;
340 record->zi_type = DMU_OT_OBJECT_ARRAY;
343 record->zi_type = DMU_OT_PACKED_NVLIST;
346 record->zi_type = DMU_OT_BPOBJ;
349 record->zi_type = DMU_OT_SPACE_MAP;
352 record->zi_type = DMU_OT_ERROR_LOG;
357 (void) strcpy(poolname, object);
362 * Convert a full path into a (dataset, file) pair.
364 if (parse_pathname(object, dataset, path, &statbuf) != 0)
367 ziprintf(" dataset: %s\n", dataset);
368 ziprintf(" path: %s\n", path);
371 * Convert (dataset, file) into (objset, object)
373 if (object_from_path(dataset, path, &statbuf, record) != 0)
376 ziprintf("raw objset: %llu\n", record->zi_objset);
377 ziprintf("raw object: %llu\n", record->zi_object);
380 * For the given object, calculate the real (type, level, range)
382 if (calculate_range(dataset, type, level, (char *)range, record) != 0)
385 ziprintf(" objset: %llu\n", record->zi_objset);
386 ziprintf(" object: %llu\n", record->zi_object);
387 if (record->zi_start == 0 &&
388 record->zi_end == -1ULL)
389 ziprintf(" range: all\n");
391 ziprintf(" range: [%llu, %llu]\n", record->zi_start,
397 (void) strcpy(poolname, dataset);
398 if ((slash = strchr(poolname, '/')) != NULL)
409 translate_raw(const char *str, zinject_record_t *record)
412 * A raw bookmark of the form objset:object:level:blkid, where each
413 * number is a hexidecimal value.
415 if (sscanf(str, "%llx:%llx:%x:%llx", (u_longlong_t *)&record->zi_objset,
416 (u_longlong_t *)&record->zi_object, &record->zi_level,
417 (u_longlong_t *)&record->zi_start) != 4) {
418 (void) fprintf(stderr, "bad raw spec '%s': must be of the form "
419 "'objset:object:level:blkid'\n", str);
423 record->zi_end = record->zi_start;
429 translate_device(const char *pool, const char *device, err_type_t label_type,
430 zinject_record_t *record)
435 boolean_t isspare, iscache;
438 * Given a device name or GUID, create an appropriate injection record
441 if ((zhp = zpool_open(g_zfs, pool)) == NULL)
444 record->zi_guid = strtoull(device, &end, 16);
445 if (record->zi_guid == 0 || *end != '\0') {
446 tgt = zpool_find_vdev(zhp, device, &isspare, &iscache, NULL);
449 (void) fprintf(stderr, "cannot find device '%s' in "
450 "pool '%s'\n", device, pool);
454 verify(nvlist_lookup_uint64(tgt, ZPOOL_CONFIG_GUID,
455 &record->zi_guid) == 0);
458 switch (label_type) {
459 case TYPE_LABEL_UBERBLOCK:
460 record->zi_start = offsetof(vdev_label_t, vl_uberblock[0]);
461 record->zi_end = record->zi_start + VDEV_UBERBLOCK_RING - 1;
463 case TYPE_LABEL_NVLIST:
464 record->zi_start = offsetof(vdev_label_t, vl_vdev_phys);
465 record->zi_end = record->zi_start + VDEV_PHYS_SIZE - 1;
467 case TYPE_LABEL_PAD1:
468 record->zi_start = offsetof(vdev_label_t, vl_pad1);
469 record->zi_end = record->zi_start + VDEV_PAD_SIZE - 1;
471 case TYPE_LABEL_PAD2:
472 record->zi_start = offsetof(vdev_label_t, vl_pad2);
473 record->zi_end = record->zi_start + VDEV_PAD_SIZE - 1;