Date: Fri, 8 Oct 2021 06:10:50 GMT From: Kyle Evans <kevans@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-branches@FreeBSD.org Subject: git: d760091fdc20 - stable/12 - loader: strings in nvlist are counted strings, not c-strings Message-ID: <202110080610.1986Aowg007252@gitrepo.freebsd.org>
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The branch stable/12 has been updated by kevans: URL: https://cgit.FreeBSD.org/src/commit/?id=d760091fdc20a6f06b9143d4d1d25ed1f775cb7c commit d760091fdc20a6f06b9143d4d1d25ed1f775cb7c Author: Toomas Soome <tsoome@FreeBSD.org> AuthorDate: 2020-06-17 10:41:01 +0000 Commit: Kyle Evans <kevans@FreeBSD.org> CommitDate: 2021-10-08 02:42:56 +0000 loader: strings in nvlist are counted strings, not c-strings We need to fetch both string size and data, then handle the data. (cherry picked from commit c98740b5e252d1cefd6d33d93fc1015d16afc1b8) --- stand/libsa/zfs/zfsimpl.c | 145 ++++++++++++++++++++++++++-------------------- 1 file changed, 83 insertions(+), 62 deletions(-) diff --git a/stand/libsa/zfs/zfsimpl.c b/stand/libsa/zfs/zfsimpl.c index 64cae5eaeefb..276c4d8bc70b 100644 --- a/stand/libsa/zfs/zfsimpl.c +++ b/stand/libsa/zfs/zfsimpl.c @@ -199,7 +199,7 @@ xdr_uint64_t(const unsigned char **xdr, uint64_t *lp) static int nvlist_find(const unsigned char *nvlist, const char *name, int type, - int *elementsp, void *valuep) + int *elementsp, void *valuep, int *sizep) { const unsigned char *p, *pair; int junk; @@ -231,6 +231,8 @@ nvlist_find(const unsigned char *nvlist, const char *name, int type, } else if (type == DATA_TYPE_STRING) { int len; xdr_int(&p, &len); + if (sizep != NULL) + *sizep = len; (*(const char **)valuep) = (const char *)p; return (0); } else if (type == DATA_TYPE_NVLIST || @@ -395,7 +397,7 @@ nvlist_print(const unsigned char *nvlist, unsigned int indent) for (i = 0; i < indent; i++) printf(" "); - printf("%s %s", typenames[pairtype], pairname); + printf("%s %.*s", typenames[pairtype], namelen, pairname); xdr_int(&p, &elements); switch (pairtype) { @@ -409,7 +411,7 @@ nvlist_print(const unsigned char *nvlist, unsigned int indent) case DATA_TYPE_STRING: { int len; xdr_int(&p, &len); - printf(" = \"%s\"\n", p); + printf(" = \"%.*s\"\n", len, p); break; } @@ -425,8 +427,8 @@ nvlist_print(const unsigned char *nvlist, unsigned int indent) if (j != elements - 1) { for (i = 0; i < indent; i++) printf(" "); - printf("%s %s", typenames[pairtype], - pairname); + printf("%s %.*s", typenames[pairtype], + namelen, pairname); } } break; @@ -1088,17 +1090,17 @@ vdev_set_initial_state(vdev_t *vdev, const unsigned char *nvlist) is_offline = is_removed = is_faulted = is_degraded = isnt_present = 0; is_log = 0; (void) nvlist_find(nvlist, ZPOOL_CONFIG_OFFLINE, DATA_TYPE_UINT64, NULL, - &is_offline); + &is_offline, NULL); (void) nvlist_find(nvlist, ZPOOL_CONFIG_REMOVED, DATA_TYPE_UINT64, NULL, - &is_removed); + &is_removed, NULL); (void) nvlist_find(nvlist, ZPOOL_CONFIG_FAULTED, DATA_TYPE_UINT64, NULL, - &is_faulted); + &is_faulted, NULL); (void) nvlist_find(nvlist, ZPOOL_CONFIG_DEGRADED, DATA_TYPE_UINT64, - NULL, &is_degraded); + NULL, &is_degraded, NULL); (void) nvlist_find(nvlist, ZPOOL_CONFIG_NOT_PRESENT, DATA_TYPE_UINT64, - NULL, &isnt_present); + NULL, &isnt_present, NULL); (void) nvlist_find(nvlist, ZPOOL_CONFIG_IS_LOG, DATA_TYPE_UINT64, NULL, - &is_log); + &is_log, NULL); if (is_offline != 0) vdev->v_state = VDEV_STATE_OFFLINE; @@ -1120,34 +1122,37 @@ vdev_init(uint64_t guid, const unsigned char *nvlist, vdev_t **vdevp) uint64_t id, ashift, asize, nparity; const char *path; const char *type; + int len, pathlen; + char *name; vdev_t *vdev; - if (nvlist_find(nvlist, ZPOOL_CONFIG_ID, DATA_TYPE_UINT64, NULL, &id) || + if (nvlist_find(nvlist, ZPOOL_CONFIG_ID, DATA_TYPE_UINT64, NULL, &id, + NULL) || nvlist_find(nvlist, ZPOOL_CONFIG_TYPE, DATA_TYPE_STRING, - NULL, &type)) { + NULL, &type, &len)) { return (ENOENT); } - if (strcmp(type, VDEV_TYPE_MIRROR) != 0 && - strcmp(type, VDEV_TYPE_DISK) != 0 && + if (memcmp(type, VDEV_TYPE_MIRROR, len) != 0 && + memcmp(type, VDEV_TYPE_DISK, len) != 0 && #ifdef ZFS_TEST - strcmp(type, VDEV_TYPE_FILE) != 0 && + memcmp(type, VDEV_TYPE_FILE, len) != 0 && #endif - strcmp(type, VDEV_TYPE_RAIDZ) != 0 && - strcmp(type, VDEV_TYPE_INDIRECT) != 0 && - strcmp(type, VDEV_TYPE_REPLACING) != 0) { + memcmp(type, VDEV_TYPE_RAIDZ, len) != 0 && + memcmp(type, VDEV_TYPE_INDIRECT, len) != 0 && + memcmp(type, VDEV_TYPE_REPLACING, len) != 0) { printf("ZFS: can only boot from disk, mirror, raidz1, " "raidz2 and raidz3 vdevs\n"); return (EIO); } - if (strcmp(type, VDEV_TYPE_MIRROR) == 0) + if (memcmp(type, VDEV_TYPE_MIRROR, len) == 0) vdev = vdev_create(guid, vdev_mirror_read); - else if (strcmp(type, VDEV_TYPE_RAIDZ) == 0) + else if (memcmp(type, VDEV_TYPE_RAIDZ, len) == 0) vdev = vdev_create(guid, vdev_raidz_read); - else if (strcmp(type, VDEV_TYPE_REPLACING) == 0) + else if (memcmp(type, VDEV_TYPE_REPLACING, len) == 0) vdev = vdev_create(guid, vdev_replacing_read); - else if (strcmp(type, VDEV_TYPE_INDIRECT) == 0) { + else if (memcmp(type, VDEV_TYPE_INDIRECT, len) == 0) { vdev_indirect_config_t *vic; vdev = vdev_create(guid, vdev_indirect_read); @@ -1158,15 +1163,15 @@ vdev_init(uint64_t guid, const unsigned char *nvlist, vdev_t **vdevp) nvlist_find(nvlist, ZPOOL_CONFIG_INDIRECT_OBJECT, DATA_TYPE_UINT64, - NULL, &vic->vic_mapping_object); + NULL, &vic->vic_mapping_object, NULL); nvlist_find(nvlist, ZPOOL_CONFIG_INDIRECT_BIRTHS, DATA_TYPE_UINT64, - NULL, &vic->vic_births_object); + NULL, &vic->vic_births_object, NULL); nvlist_find(nvlist, ZPOOL_CONFIG_PREV_INDIRECT_VDEV, DATA_TYPE_UINT64, - NULL, &vic->vic_prev_indirect_vdev); + NULL, &vic->vic_prev_indirect_vdev, NULL); } } else { vdev = vdev_create(guid, vdev_disk_read); @@ -1178,29 +1183,35 @@ vdev_init(uint64_t guid, const unsigned char *nvlist, vdev_t **vdevp) vdev_set_initial_state(vdev, nvlist); vdev->v_id = id; if (nvlist_find(nvlist, ZPOOL_CONFIG_ASHIFT, - DATA_TYPE_UINT64, NULL, &ashift) == 0) + DATA_TYPE_UINT64, NULL, &ashift, NULL) == 0) vdev->v_ashift = ashift; if (nvlist_find(nvlist, ZPOOL_CONFIG_ASIZE, - DATA_TYPE_UINT64, NULL, &asize) == 0) { + DATA_TYPE_UINT64, NULL, &asize, NULL) == 0) { vdev->v_psize = asize + VDEV_LABEL_START_SIZE + VDEV_LABEL_END_SIZE; } if (nvlist_find(nvlist, ZPOOL_CONFIG_NPARITY, - DATA_TYPE_UINT64, NULL, &nparity) == 0) + DATA_TYPE_UINT64, NULL, &nparity, NULL) == 0) vdev->v_nparity = nparity; if (nvlist_find(nvlist, ZPOOL_CONFIG_PATH, - DATA_TYPE_STRING, NULL, &path) == 0) { - if (strncmp(path, "/dev/", 5) == 0) - path += 5; - vdev->v_name = strdup(path); - } else { - char *name; + DATA_TYPE_STRING, NULL, &path, &pathlen) == 0) { + char prefix[] = "/dev/"; + len = strlen(prefix); + if (memcmp(path, prefix, len) == 0) { + path += len; + pathlen -= len; + } + name = malloc(pathlen + 1); + bcopy(path, name, pathlen); + name[pathlen] = '\0'; + vdev->v_name = name; + } else { name = NULL; - if (strcmp(type, "raidz") == 0) { + if (memcmp(type, VDEV_TYPE_RAIDZ, len) == 0) { if (vdev->v_nparity < 1 || vdev->v_nparity > 3) { printf("ZFS: can only boot from disk, " @@ -1208,10 +1219,10 @@ vdev_init(uint64_t guid, const unsigned char *nvlist, vdev_t **vdevp) "vdevs\n"); return (EIO); } - (void) asprintf(&name, "%s%d-%" PRIu64, type, + (void) asprintf(&name, "%.*s%d-%" PRIu64, len, type, vdev->v_nparity, id); } else { - (void) asprintf(&name, "%s-%" PRIu64, type, id); + (void) asprintf(&name, "%.*s-%" PRIu64, len, type, id); } vdev->v_name = name; } @@ -1314,13 +1325,13 @@ vdev_from_nvlist(spa_t *spa, uint64_t top_guid, const unsigned char *nvlist) /* Add children if there are any. */ rc = nvlist_find(nvlist, ZPOOL_CONFIG_CHILDREN, DATA_TYPE_NVLIST_ARRAY, - &nkids, &kids); + &nkids, &kids, NULL); if (rc == 0) { for (int i = 0; i < nkids; i++) { uint64_t guid; rc = nvlist_find(kids, ZPOOL_CONFIG_GUID, - DATA_TYPE_UINT64, NULL, &guid); + DATA_TYPE_UINT64, NULL, &guid, NULL); if (rc != 0) return (rc); rc = vdev_init(guid, kids, &vdev); @@ -1347,11 +1358,11 @@ vdev_init_from_label(spa_t *spa, const unsigned char *nvlist) const unsigned char *vdevs; if (nvlist_find(nvlist, ZPOOL_CONFIG_POOL_GUID, DATA_TYPE_UINT64, - NULL, &pool_guid) || + NULL, &pool_guid, NULL) || nvlist_find(nvlist, ZPOOL_CONFIG_TOP_GUID, DATA_TYPE_UINT64, - NULL, &top_guid) || + NULL, &top_guid, NULL) || nvlist_find(nvlist, ZPOOL_CONFIG_VDEV_TREE, DATA_TYPE_NVLIST, - NULL, &vdevs)) { + NULL, &vdevs, NULL)) { printf("ZFS: can't find vdev details\n"); return (ENOENT); } @@ -1418,13 +1429,13 @@ vdev_update_from_nvlist(uint64_t top_guid, const unsigned char *nvlist) /* Update children if there are any. */ rc = nvlist_find(nvlist, ZPOOL_CONFIG_CHILDREN, DATA_TYPE_NVLIST_ARRAY, - &nkids, &kids); + &nkids, &kids, NULL); if (rc == 0) { for (int i = 0; i < nkids; i++) { uint64_t guid; rc = nvlist_find(kids, ZPOOL_CONFIG_GUID, - DATA_TYPE_UINT64, NULL, &guid); + DATA_TYPE_UINT64, NULL, &guid, NULL); if (rc != 0) break; @@ -1449,11 +1460,11 @@ vdev_init_from_nvlist(spa_t *spa, const unsigned char *nvlist) int rc, nkids; if (nvlist_find(nvlist, ZPOOL_CONFIG_POOL_GUID, DATA_TYPE_UINT64, - NULL, &pool_guid) || + NULL, &pool_guid, NULL) || nvlist_find(nvlist, ZPOOL_CONFIG_VDEV_CHILDREN, DATA_TYPE_UINT64, - NULL, &vdev_children) || + NULL, &vdev_children, NULL) || nvlist_find(nvlist, ZPOOL_CONFIG_VDEV_TREE, DATA_TYPE_NVLIST, - NULL, &vdevs)) { + NULL, &vdevs, NULL)) { printf("ZFS: can't find vdev details\n"); return (ENOENT); } @@ -1465,7 +1476,7 @@ vdev_init_from_nvlist(spa_t *spa, const unsigned char *nvlist) spa->spa_root_vdev->v_nchildren = vdev_children; rc = nvlist_find(vdevs, ZPOOL_CONFIG_CHILDREN, DATA_TYPE_NVLIST_ARRAY, - &nkids, &kids); + &nkids, &kids, NULL); /* * MOS config has at least one child for root vdev. @@ -1478,7 +1489,7 @@ vdev_init_from_nvlist(spa_t *spa, const unsigned char *nvlist) vdev_t *vdev; rc = nvlist_find(kids, ZPOOL_CONFIG_GUID, DATA_TYPE_UINT64, - NULL, &guid); + NULL, &guid, NULL); if (rc != 0) break; vdev = vdev_find(guid); @@ -1837,7 +1848,7 @@ vdev_label_read_config(vdev_t *vd, uint64_t txg) nvlist = (const unsigned char *) label->vp_nvlist + 4; error = nvlist_find(nvlist, ZPOOL_CONFIG_POOL_TXG, - DATA_TYPE_UINT64, NULL, &label_txg); + DATA_TYPE_UINT64, NULL, &label_txg, NULL); if (error != 0 || label_txg == 0) { memcpy(nvl, nvlist, nvl_size); goto done; @@ -1852,7 +1863,7 @@ vdev_label_read_config(vdev_t *vd, uint64_t txg) * because we can get bad value from BIOS. */ if (nvlist_find(nvlist, ZPOOL_CONFIG_ASIZE, - DATA_TYPE_UINT64, NULL, &asize) == 0) { + DATA_TYPE_UINT64, NULL, &asize, NULL) == 0) { vd->v_psize = asize + VDEV_LABEL_START_SIZE + VDEV_LABEL_END_SIZE; } @@ -1905,7 +1916,7 @@ vdev_probe(vdev_phys_read_t *_read, void *read_priv, spa_t **spap) uint64_t pool_txg, pool_guid; const char *pool_name; const unsigned char *features; - int rc; + int rc, namelen; /* * Load the vdev label and figure out which @@ -1926,7 +1937,7 @@ vdev_probe(vdev_phys_read_t *_read, void *read_priv, spa_t **spap) return (EIO); if (nvlist_find(nvlist, ZPOOL_CONFIG_VERSION, DATA_TYPE_UINT64, - NULL, &val) != 0) { + NULL, &val, NULL) != 0) { free(nvlist); return (EIO); } @@ -1940,14 +1951,14 @@ vdev_probe(vdev_phys_read_t *_read, void *read_priv, spa_t **spap) /* Check ZFS features for read */ if (nvlist_find(nvlist, ZPOOL_CONFIG_FEATURES_FOR_READ, - DATA_TYPE_NVLIST, NULL, &features) == 0 && + DATA_TYPE_NVLIST, NULL, &features, NULL) == 0 && nvlist_check_features_for_read(features) != 0) { free(nvlist); return (EIO); } if (nvlist_find(nvlist, ZPOOL_CONFIG_POOL_STATE, DATA_TYPE_UINT64, - NULL, &val) != 0) { + NULL, &val, NULL) != 0) { free(nvlist); return (EIO); } @@ -1959,11 +1970,11 @@ vdev_probe(vdev_phys_read_t *_read, void *read_priv, spa_t **spap) } if (nvlist_find(nvlist, ZPOOL_CONFIG_POOL_TXG, DATA_TYPE_UINT64, - NULL, &pool_txg) != 0 || + NULL, &pool_txg, NULL) != 0 || nvlist_find(nvlist, ZPOOL_CONFIG_POOL_GUID, DATA_TYPE_UINT64, - NULL, &pool_guid) != 0 || + NULL, &pool_guid, NULL) != 0 || nvlist_find(nvlist, ZPOOL_CONFIG_POOL_NAME, DATA_TYPE_STRING, - NULL, &pool_name) != 0) { + NULL, &pool_name, &namelen) != 0) { /* * Cache and spare devices end up here - just ignore * them. @@ -1977,9 +1988,19 @@ vdev_probe(vdev_phys_read_t *_read, void *read_priv, spa_t **spap) */ spa = spa_find_by_guid(pool_guid); if (spa == NULL) { + char *name; + nvlist_find(nvlist, ZPOOL_CONFIG_VDEV_CHILDREN, - DATA_TYPE_UINT64, NULL, &vdev_children); - spa = spa_create(pool_guid, pool_name); + DATA_TYPE_UINT64, NULL, &vdev_children, NULL); + name = malloc(namelen + 1); + if (name == NULL) { + free(nvlist); + return (ENOMEM); + } + bcopy(pool_name, name, namelen); + name[namelen] = '\0'; + spa = spa_create(pool_guid, name); + free(name); if (spa == NULL) { free(nvlist); return (ENOMEM); @@ -1996,7 +2017,7 @@ vdev_probe(vdev_phys_read_t *_read, void *read_priv, spa_t **spap) * disks etc). */ if (nvlist_find(nvlist, ZPOOL_CONFIG_GUID, DATA_TYPE_UINT64, - NULL, &guid) != 0) { + NULL, &guid, NULL) != 0) { free(nvlist); return (EIO); }
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