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 2007 Sun Microsystems, Inc. All rights reserved.
23 * Use is subject to license terms.
26 #pragma ident "@(#)translate.c 1.3 07/11/09 SMI"
30 #undef verify /* both libzfs.h and zfs_context.h want to define this */
32 #include <sys/zfs_context.h>
42 #include <sys/mntent.h>
43 #include <sys/mnttab.h>
44 #include <sys/param.h>
48 #include <sys/dmu_objset.h>
49 #include <sys/dnode.h>
51 #include <sys/mkdev.h>
55 extern void kernel_init(int);
56 extern void kernel_fini(void);
61 ziprintf(const char *fmt, ...)
69 (void) vprintf(fmt, ap);
74 * Given a full path to a file, translate into a dataset name and a relative
75 * path within the dataset. 'dataset' must be at least MAXNAMELEN characters,
76 * and 'relpath' must be at least MAXPATHLEN characters. We also pass a stat64
77 * buffer, which we need later to get the object ID.
80 parse_pathname(const char *fullpath, char *dataset, char *relpath,
81 struct stat64 *statbuf)
88 if (fullpath[0] != '/') {
89 (void) fprintf(stderr, "invalid object '%s': must be full "
95 if (strlen(fullpath) >= MAXPATHLEN) {
96 (void) fprintf(stderr, "invalid object; pathname too long\n");
100 if (stat64(fullpath, statbuf) != 0) {
101 (void) fprintf(stderr, "cannot open '%s': %s\n",
102 fullpath, strerror(errno));
106 if ((fp = fopen(MNTTAB, "r")) == NULL) {
107 (void) fprintf(stderr, "cannot open /etc/mnttab\n");
112 while (getextmntent(fp, &mp, sizeof (mp)) == 0) {
113 if (makedev(mp.mnt_major, mp.mnt_minor) == statbuf->st_dev) {
120 (void) fprintf(stderr, "cannot find mountpoint for '%s'\n",
125 if (strcmp(mp.mnt_fstype, MNTTYPE_ZFS) != 0) {
126 (void) fprintf(stderr, "invalid path '%s': not a ZFS "
127 "filesystem\n", fullpath);
131 if (strncmp(fullpath, mp.mnt_mountp, strlen(mp.mnt_mountp)) != 0) {
132 (void) fprintf(stderr, "invalid path '%s': mountpoint "
133 "doesn't match path\n", fullpath);
137 (void) strcpy(dataset, mp.mnt_special);
139 rel = fullpath + strlen(mp.mnt_mountp);
142 (void) strcpy(relpath, rel);
148 * Convert from a (dataset, path) pair into a (objset, object) pair. Note that
149 * we grab the object number from the inode number, since looking this up via
150 * libzpool is a real pain.
154 object_from_path(const char *dataset, const char *path, struct stat64 *statbuf,
155 zinject_record_t *record)
161 * Before doing any libzpool operations, call sync() to ensure that the
162 * on-disk state is consistent with the in-core state.
166 if ((err = dmu_objset_open(dataset, DMU_OST_ZFS,
167 DS_MODE_STANDARD | DS_MODE_READONLY, &os)) != 0) {
168 (void) fprintf(stderr, "cannot open dataset '%s': %s\n",
169 dataset, strerror(err));
173 record->zi_objset = dmu_objset_id(os);
174 record->zi_object = statbuf->st_ino;
176 dmu_objset_close(os);
182 * Calculate the real range based on the type, level, and range given.
185 calculate_range(const char *dataset, err_type_t type, int level, char *range,
186 zinject_record_t *record)
194 * Determine the numeric range from the string.
198 * If range is unspecified, set the range to [0,-1], which
199 * indicates that the whole object should be treated as an
202 record->zi_start = 0;
203 record->zi_end = -1ULL;
207 /* XXX add support for suffixes */
208 record->zi_start = strtoull(range, &end, 10);
212 record->zi_end = record->zi_start + 1;
213 else if (*end == ',')
214 record->zi_end = strtoull(end + 1, &end, 10);
217 (void) fprintf(stderr, "invalid range '%s': must be "
218 "a numeric range of the form 'start[,end]'\n",
230 * If this is a request to inject faults into the dnode, then we
231 * must translate the current (objset,object) pair into an
232 * offset within the metadnode for the objset. Specifying any
233 * kind of range with type 'dnode' is illegal.
236 (void) fprintf(stderr, "range cannot be specified when "
237 "type is 'dnode'\n");
241 record->zi_start = record->zi_object * sizeof (dnode_phys_t);
242 record->zi_end = record->zi_start + sizeof (dnode_phys_t);
243 record->zi_object = 0;
248 * Get the dnode associated with object, so we can calculate the block
251 if ((err = dmu_objset_open(dataset, DMU_OST_ANY,
252 DS_MODE_STANDARD | DS_MODE_READONLY, &os)) != 0) {
253 (void) fprintf(stderr, "cannot open dataset '%s': %s\n",
254 dataset, strerror(err));
258 if (record->zi_object == 0) {
259 dn = os->os->os_meta_dnode;
261 err = dnode_hold(os->os, record->zi_object, FTAG, &dn);
263 (void) fprintf(stderr, "failed to hold dnode "
265 (u_longlong_t)record->zi_object);
271 ziprintf("data shift: %d\n", (int)dn->dn_datablkshift);
272 ziprintf(" ind shift: %d\n", (int)dn->dn_indblkshift);
275 * Translate range into block IDs.
277 if (record->zi_start != 0 || record->zi_end != -1ULL) {
278 record->zi_start >>= dn->dn_datablkshift;
279 record->zi_end >>= dn->dn_datablkshift;
283 * Check level, and then translate level 0 blkids into ranges
284 * appropriate for level of indirection.
286 record->zi_level = level;
288 ziprintf("level 0 blkid range: [%llu, %llu]\n",
289 record->zi_start, record->zi_end);
291 if (level >= dn->dn_nlevels) {
292 (void) fprintf(stderr, "level %d exceeds max level "
293 "of object (%d)\n", level, dn->dn_nlevels - 1);
297 if (record->zi_start != 0 || record->zi_end != 0) {
298 int shift = dn->dn_indblkshift - SPA_BLKPTRSHIFT;
300 for (; level > 0; level--) {
301 record->zi_start >>= shift;
302 record->zi_end >>= shift;
310 if (dn != os->os->os_meta_dnode)
311 dnode_rele(dn, FTAG);
314 dmu_objset_close(os);
320 translate_record(err_type_t type, const char *object, const char *range,
321 int level, zinject_record_t *record, char *poolname, char *dataset)
323 char path[MAXPATHLEN];
325 struct stat64 statbuf;
330 debug = (getenv("ZINJECT_DEBUG") != NULL);
332 ziprintf("translating: %s\n", object);
334 if (MOS_TYPE(type)) {
336 * MOS objects are treated specially.
343 record->zi_type = DMU_OT_OBJECT_DIRECTORY;
346 record->zi_type = DMU_OT_OBJECT_ARRAY;
349 record->zi_type = DMU_OT_PACKED_NVLIST;
352 record->zi_type = DMU_OT_BPLIST;
355 record->zi_type = DMU_OT_SPACE_MAP;
358 record->zi_type = DMU_OT_ERROR_LOG;
363 (void) strcpy(poolname, object);
368 * Convert a full path into a (dataset, file) pair.
370 if (parse_pathname(object, dataset, path, &statbuf) != 0)
373 ziprintf(" dataset: %s\n", dataset);
374 ziprintf(" path: %s\n", path);
377 * Convert (dataset, file) into (objset, object)
379 if (object_from_path(dataset, path, &statbuf, record) != 0)
382 ziprintf("raw objset: %llu\n", record->zi_objset);
383 ziprintf("raw object: %llu\n", record->zi_object);
386 * For the given object, calculate the real (type, level, range)
388 if (calculate_range(dataset, type, level, (char *)range, record) != 0)
391 ziprintf(" objset: %llu\n", record->zi_objset);
392 ziprintf(" object: %llu\n", record->zi_object);
393 if (record->zi_start == 0 &&
394 record->zi_end == -1ULL)
395 ziprintf(" range: all\n");
397 ziprintf(" range: [%llu, %llu]\n", record->zi_start,
403 (void) strcpy(poolname, dataset);
404 if ((slash = strchr(poolname, '/')) != NULL)
415 translate_raw(const char *str, zinject_record_t *record)
418 * A raw bookmark of the form objset:object:level:blkid, where each
419 * number is a hexidecimal value.
421 if (sscanf(str, "%llx:%llx:%x:%llx", (u_longlong_t *)&record->zi_objset,
422 (u_longlong_t *)&record->zi_object, &record->zi_level,
423 (u_longlong_t *)&record->zi_start) != 4) {
424 (void) fprintf(stderr, "bad raw spec '%s': must be of the form "
425 "'objset:object:level:blkid'\n", str);
429 record->zi_end = record->zi_start;
435 translate_device(const char *pool, const char *device, zinject_record_t *record)
440 boolean_t isspare, iscache;
443 * Given a device name or GUID, create an appropriate injection record
446 if ((zhp = zpool_open(g_zfs, pool)) == NULL)
449 record->zi_guid = strtoull(device, &end, 16);
450 if (record->zi_guid == 0 || *end != '\0') {
451 tgt = zpool_find_vdev(zhp, device, &isspare, &iscache);
454 (void) fprintf(stderr, "cannot find device '%s' in "
455 "pool '%s'\n", device, pool);
459 verify(nvlist_lookup_uint64(tgt, ZPOOL_CONFIG_GUID,
460 &record->zi_guid) == 0);