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Fix problem with zdb -d
zdb -d <pool>/<objset ID> does not work when other command line arguments are included i.e. zdb -U <cachefile> -d <pool>/<objset ID> This change fixes the command line parsing to handle this situation. Also fix issue where zdb -r <dataset> <file> does not handle the root <dataset> of the pool. Introduce -N option to force <objset ID> to be interpreted as a numeric objsetID. Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Reviewed-by: Rich Ercolani <rincebrain@gmail.com> Reviewed-by: Tony Nguyen <tony.nguyen@delphix.com> Signed-off-by: Paul Zuchowski <pzuchowski@datto.com> Closes #12845 Closes #12944
This commit is contained in:
Paul Zuchowski
GitHub
parent
e1c720de7d
commit
5a4d282f55
114
cmd/zdb/zdb.c
114
cmd/zdb/zdb.c
@ -8389,6 +8389,23 @@ zdb_embedded_block(char *thing)
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free(buf);
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}
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/* check for valid hex or decimal numeric string */
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static boolean_t
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zdb_numeric(char *str)
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{
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int i = 0;
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if (strlen(str) == 0)
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return (B_FALSE);
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if (strncmp(str, "0x", 2) == 0 || strncmp(str, "0X", 2) == 0)
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i = 2;
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for (; i < strlen(str); i++) {
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if (!isxdigit(str[i]))
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return (B_FALSE);
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}
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return (B_TRUE);
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}
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int
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main(int argc, char **argv)
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{
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@ -8452,6 +8469,7 @@ main(int argc, char **argv)
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{"disable-leak-tracking", no_argument, NULL, 'L'},
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{"metaslabs", no_argument, NULL, 'm'},
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{"metaslab-groups", no_argument, NULL, 'M'},
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{"numeric", no_argument, NULL, 'N'},
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{"option", required_argument, NULL, 'o'},
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{"object-lookups", no_argument, NULL, 'O'},
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{"path", required_argument, NULL, 'p'},
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@ -8475,7 +8493,7 @@ main(int argc, char **argv)
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};
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while ((c = getopt_long(argc, argv,
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"AbcCdDeEFGhiI:klLmMo:Op:PqrRsSt:uU:vVx:XYyZ",
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"AbcCdDeEFGhiI:klLmMNo:Op:PqrRsSt:uU:vVx:XYyZ",
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long_options, NULL)) != -1) {
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switch (c) {
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case 'b':
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@ -8490,6 +8508,7 @@ main(int argc, char **argv)
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case 'l':
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case 'm':
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case 'M':
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case 'N':
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case 'O':
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case 'r':
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case 'R':
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@ -8581,32 +8600,6 @@ main(int argc, char **argv)
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(void) fprintf(stderr, "-p option requires use of -e\n");
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usage();
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}
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if (dump_opt['d'] || dump_opt['r']) {
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/* <pool>[/<dataset | objset id> is accepted */
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if (argv[2] && (objset_str = strchr(argv[2], '/')) != NULL &&
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objset_str++ != NULL) {
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char *endptr;
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errno = 0;
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objset_id = strtoull(objset_str, &endptr, 0);
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/* dataset 0 is the same as opening the pool */
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if (errno == 0 && endptr != objset_str &&
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objset_id != 0) {
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target_is_spa = B_FALSE;
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dataset_lookup = B_TRUE;
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} else if (objset_id != 0) {
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printf("failed to open objset %s "
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"%llu %s", objset_str,
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(u_longlong_t)objset_id,
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strerror(errno));
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exit(1);
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}
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/* normal dataset name not an objset ID */
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if (endptr == objset_str) {
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objset_id = -1;
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}
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}
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}
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#if defined(_LP64)
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/*
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* ZDB does not typically re-read blocks; therefore limit the ARC
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@ -8645,7 +8638,7 @@ main(int argc, char **argv)
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verbose = MAX(verbose, 1);
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for (c = 0; c < 256; c++) {
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if (dump_all && strchr("AeEFklLOPrRSXy", c) == NULL)
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if (dump_all && strchr("AeEFklLNOPrRSXy", c) == NULL)
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dump_opt[c] = 1;
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if (dump_opt[c])
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dump_opt[c] += verbose;
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@ -8684,6 +8677,7 @@ main(int argc, char **argv)
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return (dump_path(argv[0], argv[1], NULL));
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}
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if (dump_opt['r']) {
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target_is_spa = B_FALSE;
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if (argc != 3)
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usage();
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dump_opt['v'] = verbose;
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@ -8694,6 +8688,10 @@ main(int argc, char **argv)
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rewind = ZPOOL_DO_REWIND |
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(dump_opt['X'] ? ZPOOL_EXTREME_REWIND : 0);
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/* -N implies -d */
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if (dump_opt['N'] && dump_opt['d'] == 0)
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dump_opt['d'] = dump_opt['N'];
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if (nvlist_alloc(&policy, NV_UNIQUE_NAME_TYPE, 0) != 0 ||
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nvlist_add_uint64(policy, ZPOOL_LOAD_REQUEST_TXG, max_txg) != 0 ||
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nvlist_add_uint32(policy, ZPOOL_LOAD_REWIND_POLICY, rewind) != 0)
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@ -8712,6 +8710,35 @@ main(int argc, char **argv)
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targetlen = strlen(target);
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if (targetlen && target[targetlen - 1] == '/')
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target[targetlen - 1] = '\0';
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/*
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* See if an objset ID was supplied (-d <pool>/<objset ID>).
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* To disambiguate tank/100, consider the 100 as objsetID
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* if -N was given, otherwise 100 is an objsetID iff
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* tank/100 as a named dataset fails on lookup.
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*/
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objset_str = strchr(target, '/');
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if (objset_str && strlen(objset_str) > 1 &&
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zdb_numeric(objset_str + 1)) {
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char *endptr;
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errno = 0;
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objset_str++;
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objset_id = strtoull(objset_str, &endptr, 0);
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/* dataset 0 is the same as opening the pool */
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if (errno == 0 && endptr != objset_str &&
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objset_id != 0) {
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if (dump_opt['N'])
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dataset_lookup = B_TRUE;
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}
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/* normal dataset name not an objset ID */
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if (endptr == objset_str) {
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objset_id = -1;
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}
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} else if (objset_str && !zdb_numeric(objset_str + 1) &&
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dump_opt['N']) {
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printf("Supply a numeric objset ID with -N\n");
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exit(1);
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}
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} else {
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target_pool = target;
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}
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@ -8829,13 +8856,27 @@ main(int argc, char **argv)
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}
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return (error);
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} else {
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target_pool = strdup(target);
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if (strpbrk(target, "/@") != NULL)
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*strpbrk(target_pool, "/@") = '\0';
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zdb_set_skip_mmp(target);
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/*
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* If -N was supplied, the user has indicated that
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* zdb -d <pool>/<objsetID> is in effect. Otherwise
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* we first assume that the dataset string is the
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* dataset name. If dmu_objset_hold fails with the
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* dataset string, and we have an objset_id, retry the
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* lookup with the objsetID.
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*/
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boolean_t retry = B_TRUE;
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retry_lookup:
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if (dataset_lookup == B_TRUE) {
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/*
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* Use the supplied id to get the name
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* for open_objset.
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*/
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error = spa_open(target, &spa, FTAG);
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error = spa_open(target_pool, &spa, FTAG);
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if (error == 0) {
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error = name_from_objset_id(spa,
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objset_id, dsname);
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@ -8844,10 +8885,23 @@ main(int argc, char **argv)
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target = dsname;
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}
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}
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if (error == 0)
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if (error == 0) {
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if (objset_id > 0 && retry) {
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int err = dmu_objset_hold(target, FTAG,
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&os);
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if (err) {
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dataset_lookup = B_TRUE;
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retry = B_FALSE;
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goto retry_lookup;
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} else {
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dmu_objset_rele(os, FTAG);
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}
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}
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error = open_objset(target, FTAG, &os);
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}
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if (error == 0)
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spa = dmu_objset_spa(os);
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free(target_pool);
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}
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}
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nvlist_free(policy);
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@ -23,7 +23,7 @@
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.Nd display ZFS storage pool debugging and consistency information
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.Sh SYNOPSIS
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.Nm
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.Op Fl AbcdDFGhikLMPsvXYy
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.Op Fl AbcdDFGhikLMNPsvXYy
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.Op Fl e Oo Fl V Oc Oo Fl p Ar path Oc Ns …
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.Op Fl I Ar inflight I/Os
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.Oo Fl o Ar var Ns = Ns Ar value Oc Ns …
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@ -137,6 +137,14 @@ also display the configuration that would be used were the pool to be imported.
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Display information about datasets.
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Specified once, displays basic dataset information: ID, create transaction,
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size, and object count.
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See
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.Fl N
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for determining if
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.Op Ar poolname Ns Op / Ns Ar dataset | objset ID
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is to use the specified
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.Op Ar dataset | objset ID
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as a string (dataset name) or a number (objset ID) when
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datasets have numeric names.
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.Pp
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If specified multiple times provides greater and greater verbosity.
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.Pp
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@ -271,6 +279,19 @@ and free space histogram, as well as overall pool fragmentation and histogram.
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.It Fl MM
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"Special" vdevs are added to -M's normal output.
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.It Fl O , -object-lookups Ns = Ns Ar dataset path
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Also display information about the maximum contiguous free space and the
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percentage of free space in each space map.
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.It Fl MMM
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Display every spacemap record.
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.It Fl N
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Same as
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.Fl d
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but force zdb to interpret the
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.Op Ar dataset | objset ID
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in
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.Op Ar poolname Ns Op / Ns Ar dataset | objset ID
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as a numeric objset ID.
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.It Fl O Ar dataset path
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Look up the specified
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.Ar path
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inside of the
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@ -58,7 +58,7 @@ set -A args "create" "add" "destroy" "import fakepool" \
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"setvprop" "blah blah" "-%" "--?" "-*" "-=" \
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"-a" "-f" "-g" "-j" "-n" "-o" "-p" "-p /tmp" \
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"-t" "-w" "-z" "-E" "-H" "-I" "-J" "-K" \
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"-N" "-Q" "-R" "-T" "-W"
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"-Q" "-R" "-T" "-W"
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log_assert "Execute zdb using invalid parameters."
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@ -30,10 +30,16 @@
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# 6. Confirm names
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# 7. Run zdb -dddddd pool/objsetID objectID (hex)
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# 8. Confirm names
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# 9. Obtain objsetID from /proc/spl/kstat/zfs/testpool/obset-0x<ID>
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# 9. Repeat with zdb -NNNNNN pool/objsetID objectID
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# 10. Obtain objsetID from /proc/spl/kstat/zfs/testpool/obset-0x<ID>
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# (linux only)
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# 10. Run zdb -dddddd pool/objsetID (hex)
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# 11. Match name from zdb against proc entry
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# 11. Run zdb -dddddd pool/objsetID (hex)
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# 12. Match name from zdb against proc entry
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# 13. Create dataset with hex numeric name
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# 14. Create dataset with decimal numeric name
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# 15. zdb -d for numeric datasets succeeds
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# 16. zdb -N for numeric datasets fails
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# 17. zdb -dN for numeric datasets fails
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#
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function cleanup
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@ -78,6 +84,17 @@ do
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(( $? != 0 )) && log_fail \
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"zdb -dddddd $TESTPOOL/$id $obj failed $reason"
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obj=$(printf "0x%X" $obj)
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log_note "zdb -NNNNNN $TESTPOOL/$id $obj"
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output=$(zdb -NNNNNN $TESTPOOL/$id $obj)
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reason="($TESTPOOL/$TESTFS not in zdb output)"
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echo $output |grep "$TESTPOOL/$TESTFS" > /dev/null
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(( $? != 0 )) && log_fail \
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"zdb -NNNNNN $TESTPOOL/$id $obj failed $reason"
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reason="(file1 not in zdb output)"
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echo $output |grep "file1" > /dev/null
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(( $? != 0 )) && log_fail \
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"zdb -NNNNNN $TESTPOOL/$id $obj failed $reason"
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done
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if is_linux; then
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@ -94,4 +111,23 @@ if is_linux; then
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"zdb -dddddd $TESTPOOL/$objset_hex failed $reason"
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fi
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log_must zfs create $TESTPOOL/0x400
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log_must zfs create $TESTPOOL/100
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output=$(zdb -d $TESTPOOL/0x400)
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reason="($TESTPOOL/0x400 not in zdb output)"
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echo $output |grep "$TESTPOOL/0x400" > /dev/null
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(( $? != 0 )) && log_fail \
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"zdb -d $TESTPOOL/0x400 failed $reason"
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output=$(zdb -d $TESTPOOL/100)
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reason="($TESTPOOL/100 not in zdb output)"
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echo $output |grep "$TESTPOOL/100" > /dev/null
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(( $? != 0 )) && log_fail \
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"zdb -d $TESTPOOL/100 failed $reason"
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# force numeric interpretation, should fail
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log_mustnot zdb -N $TESTPOOL/0x400
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log_mustnot zdb -N $TESTPOOL/100
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log_mustnot zdb -Nd $TESTPOOL/0x400
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log_mustnot zdb -Nd $TESTPOOL/100
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log_pass "zdb -d <pool>/<objset ID> generates the correct names."
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