/* * CDDL HEADER START * * The contents of this file are subject to the terms of the * Common Development and Distribution License (the "License"). * You may not use this file except in compliance with the License. * * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE * or http://www.opensolaris.org/os/licensing. * See the License for the specific language governing permissions * and limitations under the License. * * When distributing Covered Code, include this CDDL HEADER in each * file and include the License file at usr/src/OPENSOLARIS.LICENSE. * If applicable, add the following below this CDDL HEADER, with the * fields enclosed by brackets "[]" replaced with your own identifying * information: Portions Copyright [yyyy] [name of copyright owner] * * CDDL HEADER END */ /* * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. * Copyright 2011 Nexenta Systems, Inc. All rights reserved. * Copyright (c) 2011, 2015 by Delphix. All rights reserved. */ /* Portions Copyright 2010 Robert Milkowski */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef _KERNEL #define ZFS_OBJ_NAME "zfs" extern int64_t mdb_gethrtime(void); #else #define ZFS_OBJ_NAME "libzpool.so.1" #endif #define ZFS_STRUCT "struct " ZFS_OBJ_NAME "`" #ifndef _KERNEL int aok; #endif enum spa_flags { SPA_FLAG_CONFIG = 1 << 0, SPA_FLAG_VDEVS = 1 << 1, SPA_FLAG_ERRORS = 1 << 2, SPA_FLAG_METASLAB_GROUPS = 1 << 3, SPA_FLAG_METASLABS = 1 << 4, SPA_FLAG_HISTOGRAMS = 1 << 5 }; #define SPA_FLAG_ALL_VDEV \ (SPA_FLAG_VDEVS | SPA_FLAG_ERRORS | SPA_FLAG_METASLAB_GROUPS | \ SPA_FLAG_METASLABS | SPA_FLAG_HISTOGRAMS) static int getmember(uintptr_t addr, const char *type, mdb_ctf_id_t *idp, const char *member, int len, void *buf) { mdb_ctf_id_t id; ulong_t off; char name[64]; if (idp == NULL) { if (mdb_ctf_lookup_by_name(type, &id) == -1) { mdb_warn("couldn't find type %s", type); return (DCMD_ERR); } idp = &id; } else { type = name; mdb_ctf_type_name(*idp, name, sizeof (name)); } if (mdb_ctf_offsetof(*idp, member, &off) == -1) { mdb_warn("couldn't find member %s of type %s\n", member, type); return (DCMD_ERR); } if (off % 8 != 0) { mdb_warn("member %s of type %s is unsupported bitfield", member, type); return (DCMD_ERR); } off /= 8; if (mdb_vread(buf, len, addr + off) == -1) { mdb_warn("failed to read %s from %s at %p", member, type, addr + off); return (DCMD_ERR); } /* mdb_warn("read %s from %s at %p+%llx\n", member, type, addr, off); */ return (0); } #define GETMEMB(addr, structname, member, dest) \ getmember(addr, ZFS_STRUCT structname, NULL, #member, \ sizeof (dest), &(dest)) #define GETMEMBID(addr, ctfid, member, dest) \ getmember(addr, NULL, ctfid, #member, sizeof (dest), &(dest)) static boolean_t strisprint(const char *cp) { for (; *cp; cp++) { if (!isprint(*cp)) return (B_FALSE); } return (B_TRUE); } #define NICENUM_BUFLEN 6 static int snprintfrac(char *buf, int len, uint64_t numerator, uint64_t denom, int frac_digits) { int mul = 1; int whole, frac, i; for (i = frac_digits; i; i--) mul *= 10; whole = numerator / denom; frac = mul * numerator / denom - mul * whole; return (mdb_snprintf(buf, len, "%u.%0*u", whole, frac_digits, frac)); } static void mdb_nicenum(uint64_t num, char *buf) { uint64_t n = num; int index = 0; char *u; while (n >= 1024) { n = (n + (1024 / 2)) / 1024; /* Round up or down */ index++; } u = &" \0K\0M\0G\0T\0P\0E\0"[index*2]; if (index == 0) { (void) mdb_snprintf(buf, NICENUM_BUFLEN, "%llu", (u_longlong_t)n); } else if (n < 10 && (num & (num - 1)) != 0) { (void) snprintfrac(buf, NICENUM_BUFLEN, num, 1ULL << 10 * index, 2); strcat(buf, u); } else if (n < 100 && (num & (num - 1)) != 0) { (void) snprintfrac(buf, NICENUM_BUFLEN, num, 1ULL << 10 * index, 1); strcat(buf, u); } else { (void) mdb_snprintf(buf, NICENUM_BUFLEN, "%llu%s", (u_longlong_t)n, u); } } static int verbose; static int freelist_walk_init(mdb_walk_state_t *wsp) { if (wsp->walk_addr == NULL) { mdb_warn("must supply starting address\n"); return (WALK_ERR); } wsp->walk_data = 0; /* Index into the freelist */ return (WALK_NEXT); } static int freelist_walk_step(mdb_walk_state_t *wsp) { uint64_t entry; uintptr_t number = (uintptr_t)wsp->walk_data; char *ddata[] = { "ALLOC", "FREE", "CONDENSE", "INVALID", "INVALID", "INVALID", "INVALID", "INVALID" }; int mapshift = SPA_MINBLOCKSHIFT; if (mdb_vread(&entry, sizeof (entry), wsp->walk_addr) == -1) { mdb_warn("failed to read freelist entry %p", wsp->walk_addr); return (WALK_DONE); } wsp->walk_addr += sizeof (entry); wsp->walk_data = (void *)(number + 1); if (SM_DEBUG_DECODE(entry)) { mdb_printf("DEBUG: %3u %10s: txg=%llu pass=%llu\n", number, ddata[SM_DEBUG_ACTION_DECODE(entry)], SM_DEBUG_TXG_DECODE(entry), SM_DEBUG_SYNCPASS_DECODE(entry)); } else { mdb_printf("Entry: %3u offsets=%08llx-%08llx type=%c " "size=%06llx", number, SM_OFFSET_DECODE(entry) << mapshift, (SM_OFFSET_DECODE(entry) + SM_RUN_DECODE(entry)) << mapshift, SM_TYPE_DECODE(entry) == SM_ALLOC ? 'A' : 'F', SM_RUN_DECODE(entry) << mapshift); if (verbose) mdb_printf(" (raw=%012llx)\n", entry); mdb_printf("\n"); } return (WALK_NEXT); } static int mdb_dsl_dir_name(uintptr_t addr, char *buf) { static int gotid; static mdb_ctf_id_t dd_id; uintptr_t dd_parent; char dd_myname[ZFS_MAX_DATASET_NAME_LEN]; if (!gotid) { if (mdb_ctf_lookup_by_name(ZFS_STRUCT "dsl_dir", &dd_id) == -1) { mdb_warn("couldn't find struct dsl_dir"); return (DCMD_ERR); } gotid = TRUE; } if (GETMEMBID(addr, &dd_id, dd_parent, dd_parent) || GETMEMBID(addr, &dd_id, dd_myname, dd_myname)) { return (DCMD_ERR); } if (dd_parent) { if (mdb_dsl_dir_name(dd_parent, buf)) return (DCMD_ERR); strcat(buf, "/"); } if (dd_myname[0]) strcat(buf, dd_myname); else strcat(buf, "???"); return (0); } static int objset_name(uintptr_t addr, char *buf) { static int gotid; static mdb_ctf_id_t os_id, ds_id; uintptr_t os_dsl_dataset; char ds_snapname[ZFS_MAX_DATASET_NAME_LEN]; uintptr_t ds_dir; buf[0] = '\0'; if (!gotid) { if (mdb_ctf_lookup_by_name(ZFS_STRUCT "objset", &os_id) == -1) { mdb_warn("couldn't find struct objset"); return (DCMD_ERR); } if (mdb_ctf_lookup_by_name(ZFS_STRUCT "dsl_dataset", &ds_id) == -1) { mdb_warn("couldn't find struct dsl_dataset"); return (DCMD_ERR); } gotid = TRUE; } if (GETMEMBID(addr, &os_id, os_dsl_dataset, os_dsl_dataset)) return (DCMD_ERR); if (os_dsl_dataset == 0) { strcat(buf, "mos"); return (0); } if (GETMEMBID(os_dsl_dataset, &ds_id, ds_snapname, ds_snapname) || GETMEMBID(os_dsl_dataset, &ds_id, ds_dir, ds_dir)) { return (DCMD_ERR); } if (ds_dir && mdb_dsl_dir_name(ds_dir, buf)) return (DCMD_ERR); if (ds_snapname[0]) { strcat(buf, "@"); strcat(buf, ds_snapname); } return (0); } static void enum_lookup(char *out, size_t size, mdb_ctf_id_t id, int val, const char *prefix) { const char *cp; size_t len = strlen(prefix); if ((cp = mdb_ctf_enum_name(id, val)) != NULL) { if (strncmp(cp, prefix, len) == 0) cp += len; (void) strncpy(out, cp, size); } else { mdb_snprintf(out, size, "? (%d)", val); } } /* ARGSUSED */ static int zfs_params(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) { /* * This table can be approximately generated by running: * egrep "^[a-z0-9_]+ [a-z0-9_]+( =.*)?;" *.c | cut -d ' ' -f 2 */ static const char *params[] = { "arc_reduce_dnlc_percent", "arc_lotsfree_percent", "zfs_dirty_data_max", "zfs_dirty_data_sync", "zfs_delay_max_ns", "zfs_delay_min_dirty_percent", "zfs_delay_scale", "zfs_vdev_max_active", "zfs_vdev_sync_read_min_active", "zfs_vdev_sync_read_max_active", "zfs_vdev_sync_write_min_active", "zfs_vdev_sync_write_max_active", "zfs_vdev_async_read_min_active", "zfs_vdev_async_read_max_active", "zfs_vdev_async_write_min_active", "zfs_vdev_async_write_max_active", "zfs_vdev_scrub_min_active", "zfs_vdev_scrub_max_active", "zfs_vdev_async_write_active_min_dirty_percent", "zfs_vdev_async_write_active_max_dirty_percent", "spa_asize_inflation", "zfs_arc_max", "zfs_arc_min", "arc_shrink_shift", "zfs_mdcomp_disable", "zfs_prefetch_disable", "zfetch_max_streams", "zfetch_min_sec_reap", "zfetch_block_cap", "zfetch_array_rd_sz", "zfs_default_bs", "zfs_default_ibs", "metaslab_aliquot", "reference_tracking_enable", "reference_history", "spa_max_replication_override", "spa_mode_global", "zfs_flags", "zfs_txg_timeout", "zfs_vdev_cache_max", "zfs_vdev_cache_size", "zfs_vdev_cache_bshift", "vdev_mirror_shift", "zfs_scrub_limit", "zfs_no_scrub_io", "zfs_no_scrub_prefetch", "zfs_vdev_aggregation_limit", "fzap_default_block_shift", "zfs_immediate_write_sz", "zfs_read_chunk_size", "zfs_nocacheflush", "zil_replay_disable", "metaslab_gang_bang", "metaslab_df_alloc_threshold", "metaslab_df_free_pct", "zio_injection_enabled", "zvol_immediate_write_sz", }; for (int i = 0; i < sizeof (params) / sizeof (params[0]); i++) { int sz; uint64_t val64; uint32_t *val32p = (uint32_t *)&val64; sz = mdb_readvar(&val64, params[i]); if (sz == 4) { mdb_printf("%s = 0x%x\n", params[i], *val32p); } else if (sz == 8) { mdb_printf("%s = 0x%llx\n", params[i], val64); } else { mdb_warn("variable %s not found", params[i]); } } return (DCMD_OK); } /* ARGSUSED */ static int blkptr(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) { mdb_ctf_id_t type_enum, checksum_enum, compress_enum; char type[80], checksum[80], compress[80]; blkptr_t blk, *bp = &blk; char buf[BP_SPRINTF_LEN]; if (mdb_vread(&blk, sizeof (blkptr_t), addr) == -1) { mdb_warn("failed to read blkptr_t"); return (DCMD_ERR); } if (mdb_ctf_lookup_by_name("enum dmu_object_type", &type_enum) == -1 || mdb_ctf_lookup_by_name("enum zio_checksum", &checksum_enum) == -1 || mdb_ctf_lookup_by_name("enum zio_compress", &compress_enum) == -1) { mdb_warn("Could not find blkptr enumerated types"); return (DCMD_ERR); } enum_lookup(type, sizeof (type), type_enum, BP_GET_TYPE(bp), "DMU_OT_"); enum_lookup(checksum, sizeof (checksum), checksum_enum, BP_GET_CHECKSUM(bp), "ZIO_CHECKSUM_"); enum_lookup(compress, sizeof (compress), compress_enum, BP_GET_COMPRESS(bp), "ZIO_COMPRESS_"); SNPRINTF_BLKPTR(mdb_snprintf, '\n', buf, sizeof (buf), bp, type, checksum, compress); mdb_printf("%s\n", buf); return (DCMD_OK); } typedef struct mdb_dmu_buf_impl { struct { uint64_t db_object; uintptr_t db_data; } db; uintptr_t db_objset; uint64_t db_level; uint64_t db_blkid; struct { uint64_t rc_count; } db_holds; } mdb_dmu_buf_impl_t; /* ARGSUSED */ static int dbuf(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) { mdb_dmu_buf_impl_t db; char objectname[32]; char blkidname[32]; char path[ZFS_MAX_DATASET_NAME_LEN]; if (DCMD_HDRSPEC(flags)) mdb_printf(" addr object lvl blkid holds os\n"); if (mdb_ctf_vread(&db, ZFS_STRUCT "dmu_buf_impl", "mdb_dmu_buf_impl_t", addr, 0) == -1) return (DCMD_ERR); if (db.db.db_object == DMU_META_DNODE_OBJECT) (void) strcpy(objectname, "mdn"); else (void) mdb_snprintf(objectname, sizeof (objectname), "%llx", (u_longlong_t)db.db.db_object); if (db.db_blkid == DMU_BONUS_BLKID) (void) strcpy(blkidname, "bonus"); else (void) mdb_snprintf(blkidname, sizeof (blkidname), "%llx", (u_longlong_t)db.db_blkid); if (objset_name(db.db_objset, path)) { return (DCMD_ERR); } mdb_printf("%p %8s %1u %9s %2llu %s\n", addr, objectname, (int)db.db_level, blkidname, db.db_holds.rc_count, path); return (DCMD_OK); } /* ARGSUSED */ static int dbuf_stats(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) { #define HISTOSZ 32 uintptr_t dbp; dmu_buf_impl_t db; dbuf_hash_table_t ht; uint64_t bucket, ndbufs; uint64_t histo[HISTOSZ]; uint64_t histo2[HISTOSZ]; int i, maxidx; if (mdb_readvar(&ht, "dbuf_hash_table") == -1) { mdb_warn("failed to read 'dbuf_hash_table'"); return (DCMD_ERR); } for (i = 0; i < HISTOSZ; i++) { histo[i] = 0; histo2[i] = 0; } ndbufs = 0; for (bucket = 0; bucket < ht.hash_table_mask+1; bucket++) { int len; if (mdb_vread(&dbp, sizeof (void *), (uintptr_t)(ht.hash_table+bucket)) == -1) { mdb_warn("failed to read hash bucket %u at %p", bucket, ht.hash_table+bucket); return (DCMD_ERR); } len = 0; while (dbp != 0) { if (mdb_vread(&db, sizeof (dmu_buf_impl_t), dbp) == -1) { mdb_warn("failed to read dbuf at %p", dbp); return (DCMD_ERR); } dbp = (uintptr_t)db.db_hash_next; for (i = MIN(len, HISTOSZ - 1); i >= 0; i--) histo2[i]++; len++; ndbufs++; } if (len >= HISTOSZ) len = HISTOSZ-1; histo[len]++; } mdb_printf("hash table has %llu buckets, %llu dbufs " "(avg %llu buckets/dbuf)\n", ht.hash_table_mask+1, ndbufs, (ht.hash_table_mask+1)/ndbufs); mdb_printf("\n"); maxidx = 0; for (i = 0; i < HISTOSZ; i++) if (histo[i] > 0) maxidx = i; mdb_printf("hash chain length number of buckets\n"); for (i = 0; i <= maxidx; i++) mdb_printf("%u %llu\n", i, histo[i]); mdb_printf("\n"); maxidx = 0; for (i = 0; i < HISTOSZ; i++) if (histo2[i] > 0) maxidx = i; mdb_printf("hash chain depth number of dbufs\n"); for (i = 0; i <= maxidx; i++) mdb_printf("%u or more %llu %llu%%\n", i, histo2[i], histo2[i]*100/ndbufs); return (DCMD_OK); } #define CHAIN_END 0xffff /* * ::zap_leaf [-v] * * Print a zap_leaf_phys_t, assumed to be 16k */ /* ARGSUSED */ static int zap_leaf(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) { char buf[16*1024]; int verbose = B_FALSE; int four = B_FALSE; dmu_buf_t l_dbuf; zap_leaf_t l; zap_leaf_phys_t *zlp = (void *)buf; int i; if (mdb_getopts(argc, argv, 'v', MDB_OPT_SETBITS, TRUE, &verbose, '4', MDB_OPT_SETBITS, TRUE, &four, NULL) != argc) return (DCMD_USAGE); l_dbuf.db_data = zlp; l.l_dbuf = &l_dbuf; l.l_bs = 14; /* assume 16k blocks */ if (four) l.l_bs = 12; if (!(flags & DCMD_ADDRSPEC)) { return (DCMD_USAGE); } if (mdb_vread(buf, sizeof (buf), addr) == -1) { mdb_warn("failed to read zap_leaf_phys_t at %p", addr); return (DCMD_ERR); } if (zlp->l_hdr.lh_block_type != ZBT_LEAF || zlp->l_hdr.lh_magic != ZAP_LEAF_MAGIC) { mdb_warn("This does not appear to be a zap_leaf_phys_t"); return (DCMD_ERR); } mdb_printf("zap_leaf_phys_t at %p:\n", addr); mdb_printf(" lh_prefix_len = %u\n", zlp->l_hdr.lh_prefix_len); mdb_printf(" lh_prefix = %llx\n", zlp->l_hdr.lh_prefix); mdb_printf(" lh_nentries = %u\n", zlp->l_hdr.lh_nentries); mdb_printf(" lh_nfree = %u\n", zlp->l_hdr.lh_nfree, zlp->l_hdr.lh_nfree * 100 / (ZAP_LEAF_NUMCHUNKS(&l))); mdb_printf(" lh_freelist = %u\n", zlp->l_hdr.lh_freelist); mdb_printf(" lh_flags = %x (%s)\n", zlp->l_hdr.lh_flags, zlp->l_hdr.lh_flags & ZLF_ENTRIES_CDSORTED ? "ENTRIES_CDSORTED" : ""); if (verbose) { mdb_printf(" hash table:\n"); for (i = 0; i < ZAP_LEAF_HASH_NUMENTRIES(&l); i++) { if (zlp->l_hash[i] != CHAIN_END) mdb_printf(" %u: %u\n", i, zlp->l_hash[i]); } } mdb_printf(" chunks:\n"); for (i = 0; i < ZAP_LEAF_NUMCHUNKS(&l); i++) { /* LINTED: alignment */ zap_leaf_chunk_t *zlc = &ZAP_LEAF_CHUNK(&l, i); switch (zlc->l_entry.le_type) { case ZAP_CHUNK_FREE: if (verbose) { mdb_printf(" %u: free; lf_next = %u\n", i, zlc->l_free.lf_next); } break; case ZAP_CHUNK_ENTRY: mdb_printf(" %u: entry\n", i); if (verbose) { mdb_printf(" le_next = %u\n", zlc->l_entry.le_next); } mdb_printf(" le_name_chunk = %u\n", zlc->l_entry.le_name_chunk); mdb_printf(" le_name_numints = %u\n", zlc->l_entry.le_name_numints); mdb_printf(" le_value_chunk = %u\n", zlc->l_entry.le_value_chunk); mdb_printf(" le_value_intlen = %u\n", zlc->l_entry.le_value_intlen); mdb_printf(" le_value_numints = %u\n", zlc->l_entry.le_value_numints); mdb_printf(" le_cd = %u\n", zlc->l_entry.le_cd); mdb_printf(" le_hash = %llx\n", zlc->l_entry.le_hash); break; case ZAP_CHUNK_ARRAY: mdb_printf(" %u: array", i); if (strisprint((char *)zlc->l_array.la_array)) mdb_printf(" \"%s\"", zlc->l_array.la_array); mdb_printf("\n"); if (verbose) { int j; mdb_printf(" "); for (j = 0; j < ZAP_LEAF_ARRAY_BYTES; j++) { mdb_printf("%02x ", zlc->l_array.la_array[j]); } mdb_printf("\n"); } if (zlc->l_array.la_next != CHAIN_END) { mdb_printf(" lf_next = %u\n", zlc->l_array.la_next); } break; default: mdb_printf(" %u: undefined type %u\n", zlc->l_entry.le_type); } } return (DCMD_OK); } typedef struct dbufs_data { mdb_ctf_id_t id; uint64_t objset; uint64_t object; uint64_t level; uint64_t blkid; char *osname; } dbufs_data_t; #define DBUFS_UNSET (0xbaddcafedeadbeefULL) /* ARGSUSED */ static int dbufs_cb(uintptr_t addr, const void *unknown, void *arg) { dbufs_data_t *data = arg; uintptr_t objset; dmu_buf_t db; uint8_t level; uint64_t blkid; char osname[ZFS_MAX_DATASET_NAME_LEN]; if (GETMEMBID(addr, &data->id, db_objset, objset) || GETMEMBID(addr, &data->id, db, db) || GETMEMBID(addr, &data->id, db_level, level) || GETMEMBID(addr, &data->id, db_blkid, blkid)) { return (WALK_ERR); } if ((data->objset == DBUFS_UNSET || data->objset == objset) && (data->osname == NULL || (objset_name(objset, osname) == 0 && strcmp(data->osname, osname) == 0)) && (data->object == DBUFS_UNSET || data->object == db.db_object) && (data->level == DBUFS_UNSET || data->level == level) && (data->blkid == DBUFS_UNSET || data->blkid == blkid)) { mdb_printf("%#lr\n", addr); } return (WALK_NEXT); } /* ARGSUSED */ static int dbufs(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) { dbufs_data_t data; char *object = NULL; char *blkid = NULL; data.objset = data.object = data.level = data.blkid = DBUFS_UNSET; data.osname = NULL; if (mdb_getopts(argc, argv, 'O', MDB_OPT_UINT64, &data.objset, 'n', MDB_OPT_STR, &data.osname, 'o', MDB_OPT_STR, &object, 'l', MDB_OPT_UINT64, &data.level, 'b', MDB_OPT_STR, &blkid) != argc) { return (DCMD_USAGE); } if (object) { if (strcmp(object, "mdn") == 0) { data.object = DMU_META_DNODE_OBJECT; } else { data.object = mdb_strtoull(object); } } if (blkid) { if (strcmp(blkid, "bonus") == 0) { data.blkid = DMU_BONUS_BLKID; } else { data.blkid = mdb_strtoull(blkid); } } if (mdb_ctf_lookup_by_name(ZFS_STRUCT "dmu_buf_impl", &data.id) == -1) { mdb_warn("couldn't find struct dmu_buf_impl_t"); return (DCMD_ERR); } if (mdb_walk("dmu_buf_impl_t", dbufs_cb, &data) != 0) { mdb_warn("can't walk dbufs"); return (DCMD_ERR); } return (DCMD_OK); } typedef struct abuf_find_data { dva_t dva; mdb_ctf_id_t id; } abuf_find_data_t; /* ARGSUSED */ static int abuf_find_cb(uintptr_t addr, const void *unknown, void *arg) { abuf_find_data_t *data = arg; dva_t dva; if (GETMEMBID(addr, &data->id, b_dva, dva)) { return (WALK_ERR); } if (dva.dva_word[0] == data->dva.dva_word[0] && dva.dva_word[1] == data->dva.dva_word[1]) { mdb_printf("%#lr\n", addr); } return (WALK_NEXT); } /* ARGSUSED */ static int abuf_find(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) { abuf_find_data_t data; GElf_Sym sym; int i; const char *syms[] = { "ARC_mru", "ARC_mru_ghost", "ARC_mfu", "ARC_mfu_ghost", }; if (argc != 2) return (DCMD_USAGE); for (i = 0; i < 2; i ++) { switch (argv[i].a_type) { case MDB_TYPE_STRING: data.dva.dva_word[i] = mdb_strtoull(argv[i].a_un.a_str); break; case MDB_TYPE_IMMEDIATE: data.dva.dva_word[i] = argv[i].a_un.a_val; break; default: return (DCMD_USAGE); } } if (mdb_ctf_lookup_by_name(ZFS_STRUCT "arc_buf_hdr", &data.id) == -1) { mdb_warn("couldn't find struct arc_buf_hdr"); return (DCMD_ERR); } for (i = 0; i < sizeof (syms) / sizeof (syms[0]); i++) { if (mdb_lookup_by_obj(ZFS_OBJ_NAME, syms[i], &sym)) { mdb_warn("can't find symbol %s", syms[i]); return (DCMD_ERR); } if (mdb_pwalk("list", abuf_find_cb, &data, sym.st_value) != 0) { mdb_warn("can't walk %s", syms[i]); return (DCMD_ERR); } } return (DCMD_OK); } typedef struct dbgmsg_arg { boolean_t da_verbose; boolean_t da_address; } dbgmsg_arg_t; /* ARGSUSED */ static int dbgmsg_cb(uintptr_t addr, const void *unknown, void *arg) { static mdb_ctf_id_t id; static boolean_t gotid; static ulong_t off; dbgmsg_arg_t *da = arg; time_t timestamp; char buf[1024]; if (!gotid) { if (mdb_ctf_lookup_by_name(ZFS_STRUCT "zfs_dbgmsg", &id) == -1) { mdb_warn("couldn't find struct zfs_dbgmsg"); return (WALK_ERR); } gotid = TRUE; if (mdb_ctf_offsetof(id, "zdm_msg", &off) == -1) { mdb_warn("couldn't find zdm_msg"); return (WALK_ERR); } off /= 8; } if (GETMEMBID(addr, &id, zdm_timestamp, timestamp)) { return (WALK_ERR); } if (mdb_readstr(buf, sizeof (buf), addr + off) == -1) { mdb_warn("failed to read zdm_msg at %p\n", addr + off); return (DCMD_ERR); } if (da->da_address) mdb_printf("%p ", addr); if (da->da_verbose) mdb_printf("%Y ", timestamp); mdb_printf("%s\n", buf); if (da->da_verbose) (void) mdb_call_dcmd("whatis", addr, DCMD_ADDRSPEC, 0, NULL); return (WALK_NEXT); } /* ARGSUSED */ static int dbgmsg(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) { GElf_Sym sym; dbgmsg_arg_t da = { 0 }; if (mdb_getopts(argc, argv, 'v', MDB_OPT_SETBITS, B_TRUE, &da.da_verbose, 'a', MDB_OPT_SETBITS, B_TRUE, &da.da_address, NULL) != argc) return (DCMD_USAGE); if (mdb_lookup_by_obj(ZFS_OBJ_NAME, "zfs_dbgmsgs", &sym)) { mdb_warn("can't find zfs_dbgmsgs"); return (DCMD_ERR); } if (mdb_pwalk("list", dbgmsg_cb, &da, sym.st_value) != 0) { mdb_warn("can't walk zfs_dbgmsgs"); return (DCMD_ERR); } return (DCMD_OK); } /*ARGSUSED*/ static int arc_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) { kstat_named_t *stats; GElf_Sym sym; int nstats, i; uint_t opt_a = FALSE; uint_t opt_b = FALSE; uint_t shift = 0; const char *suffix; static const char *bytestats[] = { "p", "c", "c_min", "c_max", "size", "duplicate_buffers_size", "arc_meta_used", "arc_meta_limit", "arc_meta_max", "arc_meta_min", "hdr_size", "data_size", "metadata_size", "other_size", "anon_size", "anon_evictable_data", "anon_evictable_metadata", "mru_size", "mru_evictable_data", "mru_evictable_metadata", "mru_ghost_size", "mru_ghost_evictable_data", "mru_ghost_evictable_metadata", "mfu_size", "mfu_evictable_data", "mfu_evictable_metadata", "mfu_ghost_size", "mfu_ghost_evictable_data", "mfu_ghost_evictable_metadata", "evict_l2_cached", "evict_l2_eligible", "evict_l2_ineligible", "l2_read_bytes", "l2_write_bytes", "l2_size", "l2_asize", "l2_hdr_size", NULL }; static const char *extras[] = { "arc_no_grow", "arc_tempreserve", NULL }; if (mdb_lookup_by_obj(ZFS_OBJ_NAME, "arc_stats", &sym) == -1) { mdb_warn("failed to find 'arc_stats'"); return (DCMD_ERR); } stats = mdb_zalloc(sym.st_size, UM_SLEEP | UM_GC); if (mdb_vread(stats, sym.st_size, sym.st_value) == -1) { mdb_warn("couldn't read 'arc_stats' at %p", sym.st_value); return (DCMD_ERR); } nstats = sym.st_size / sizeof (kstat_named_t); /* NB: -a / opt_a are ignored for backwards compatability */ if (mdb_getopts(argc, argv, 'a', MDB_OPT_SETBITS, TRUE, &opt_a, 'b', MDB_OPT_SETBITS, TRUE, &opt_b, 'k', MDB_OPT_SETBITS, 10, &shift, 'm', MDB_OPT_SETBITS, 20, &shift, 'g', MDB_OPT_SETBITS, 30, &shift, NULL) != argc) return (DCMD_USAGE); if (!opt_b && !shift) shift = 20; switch (shift) { case 0: suffix = "B"; break; case 10: suffix = "KB"; break; case 20: suffix = "MB"; break; case 30: suffix = "GB"; break; default: suffix = "XX"; } for (i = 0; i < nstats; i++) { int j; boolean_t bytes = B_FALSE; for (j = 0; bytestats[j]; j++) { if (strcmp(stats[i].name, bytestats[j]) == 0) { bytes = B_TRUE; break; } } if (bytes) { mdb_printf("%-25s = %9llu %s\n", stats[i].name, stats[i].value.ui64 >> shift, suffix); } else { mdb_printf("%-25s = %9llu\n", stats[i].name, stats[i].value.ui64); } } for (i = 0; extras[i]; i++) { uint64_t buf; if (mdb_lookup_by_obj(ZFS_OBJ_NAME, extras[i], &sym) == -1) { mdb_warn("failed to find '%s'", extras[i]); return (DCMD_ERR); } if (sym.st_size != sizeof (uint64_t) && sym.st_size != sizeof (uint32_t)) { mdb_warn("expected scalar for variable '%s'\n", extras[i]); return (DCMD_ERR); } if (mdb_vread(&buf, sym.st_size, sym.st_value) == -1) { mdb_warn("couldn't read '%s'", extras[i]); return (DCMD_ERR); } mdb_printf("%-25s = ", extras[i]); /* NB: all the 64-bit extras happen to be byte counts */ if (sym.st_size == sizeof (uint64_t)) mdb_printf("%9llu %s\n", buf >> shift, suffix); if (sym.st_size == sizeof (uint32_t)) mdb_printf("%9d\n", *((uint32_t *)&buf)); } return (DCMD_OK); } typedef struct mdb_spa_print { pool_state_t spa_state; char spa_name[ZFS_MAX_DATASET_NAME_LEN]; } mdb_spa_print_t; /* * ::spa * * -c Print configuration information as well * -v Print vdev state * -e Print vdev error stats * -m Print vdev metaslab info * -M print vdev metaslab group info * -h Print histogram info (must be combined with -m or -M) * * Print a summarized spa_t. When given no arguments, prints out a table of all * active pools on the system. */ /* ARGSUSED */ static int spa_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) { const char *statetab[] = { "ACTIVE", "EXPORTED", "DESTROYED", "SPARE", "L2CACHE", "UNINIT", "UNAVAIL", "POTENTIAL" }; const char *state; int spa_flags = 0; if (mdb_getopts(argc, argv, 'c', MDB_OPT_SETBITS, SPA_FLAG_CONFIG, &spa_flags, 'v', MDB_OPT_SETBITS, SPA_FLAG_VDEVS, &spa_flags, 'e', MDB_OPT_SETBITS, SPA_FLAG_ERRORS, &spa_flags, 'M', MDB_OPT_SETBITS, SPA_FLAG_METASLAB_GROUPS, &spa_flags, 'm', MDB_OPT_SETBITS, SPA_FLAG_METASLABS, &spa_flags, 'h', MDB_OPT_SETBITS, SPA_FLAG_HISTOGRAMS, &spa_flags, NULL) != argc) return (DCMD_USAGE); if (!(flags & DCMD_ADDRSPEC)) { if (mdb_walk_dcmd("spa", "spa", argc, argv) == -1) { mdb_warn("can't walk spa"); return (DCMD_ERR); } return (DCMD_OK); } if (flags & DCMD_PIPE_OUT) { mdb_printf("%#lr\n", addr); return (DCMD_OK); } if (DCMD_HDRSPEC(flags)) mdb_printf("%%-?s %9s %-*s%\n", "ADDR", "STATE", sizeof (uintptr_t) == 4 ? 60 : 52, "NAME"); mdb_spa_print_t spa; if (mdb_ctf_vread(&spa, "spa_t", "mdb_spa_print_t", addr, 0) == -1) return (DCMD_ERR); if (spa.spa_state < 0 || spa.spa_state > POOL_STATE_UNAVAIL) state = "UNKNOWN"; else state = statetab[spa.spa_state]; mdb_printf("%0?p %9s %s\n", addr, state, spa.spa_name); if (spa_flags & SPA_FLAG_CONFIG) { mdb_printf("\n"); mdb_inc_indent(4); if (mdb_call_dcmd("spa_config", addr, flags, 0, NULL) != DCMD_OK) return (DCMD_ERR); mdb_dec_indent(4); } if (spa_flags & SPA_FLAG_ALL_VDEV) { mdb_arg_t v; char opts[100] = "-"; int args = (spa_flags | SPA_FLAG_VDEVS) == SPA_FLAG_VDEVS ? 0 : 1; if (spa_flags & SPA_FLAG_ERRORS) strcat(opts, "e"); if (spa_flags & SPA_FLAG_METASLABS) strcat(opts, "m"); if (spa_flags & SPA_FLAG_METASLAB_GROUPS) strcat(opts, "M"); if (spa_flags & SPA_FLAG_HISTOGRAMS) strcat(opts, "h"); v.a_type = MDB_TYPE_STRING; v.a_un.a_str = opts; mdb_printf("\n"); mdb_inc_indent(4); if (mdb_call_dcmd("spa_vdevs", addr, flags, args, &v) != DCMD_OK) return (DCMD_ERR); mdb_dec_indent(4); } return (DCMD_OK); } typedef struct mdb_spa_config_spa { uintptr_t spa_config; } mdb_spa_config_spa_t; /* * ::spa_config * * Given a spa_t, print the configuration information stored in spa_config. * Since it's just an nvlist, format it as an indented list of name=value pairs. * We simply read the value of spa_config and pass off to ::nvlist. */ /* ARGSUSED */ static int spa_print_config(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) { mdb_spa_config_spa_t spa; if (argc != 0 || !(flags & DCMD_ADDRSPEC)) return (DCMD_USAGE); if (mdb_ctf_vread(&spa, ZFS_STRUCT "spa", "mdb_spa_config_spa_t", addr, 0) == -1) return (DCMD_ERR); if (spa.spa_config == 0) { mdb_printf("(none)\n"); return (DCMD_OK); } return (mdb_call_dcmd("nvlist", spa.spa_config, flags, 0, NULL)); } const char histo_stars[] = "****************************************"; const int histo_width = sizeof (histo_stars) - 1; static void dump_histogram(const uint64_t *histo, int size, int offset) { int i; int minidx = size - 1; int maxidx = 0; uint64_t max = 0; for (i = 0; i < size; i++) { if (histo[i] > max) max = histo[i]; if (histo[i] > 0 && i > maxidx) maxidx = i; if (histo[i] > 0 && i < minidx) minidx = i; } if (max < histo_width) max = histo_width; for (i = minidx; i <= maxidx; i++) { mdb_printf("%3u: %6llu %s\n", i + offset, (u_longlong_t)histo[i], &histo_stars[(max - histo[i]) * histo_width / max]); } } typedef struct mdb_range_tree { uint64_t rt_space; } mdb_range_tree_t; typedef struct mdb_metaslab_group { uint64_t mg_fragmentation; uint64_t mg_histogram[RANGE_TREE_HISTOGRAM_SIZE]; } mdb_metaslab_group_t; typedef struct mdb_metaslab { uint64_t ms_id; uint64_t ms_start; uint64_t ms_size; uint64_t ms_fragmentation; uintptr_t ms_alloctree[TXG_SIZE]; uintptr_t ms_freetree[TXG_SIZE]; uintptr_t ms_tree; uintptr_t ms_sm; } mdb_metaslab_t; typedef struct mdb_space_map_phys_t { uint64_t smp_alloc; uint64_t smp_histogram[SPACE_MAP_HISTOGRAM_SIZE]; } mdb_space_map_phys_t; typedef struct mdb_space_map { uint64_t sm_size; uint8_t sm_shift; uint64_t sm_alloc; uintptr_t sm_phys; } mdb_space_map_t; typedef struct mdb_vdev { uintptr_t vdev_ms; uint64_t vdev_ms_count; vdev_stat_t vdev_stat; } mdb_vdev_t; static int metaslab_stats(uintptr_t addr, int spa_flags) { mdb_vdev_t vdev; uintptr_t *vdev_ms; if (mdb_ctf_vread(&vdev, "vdev_t", "mdb_vdev_t", (uintptr_t)addr, 0) == -1) { mdb_warn("failed to read vdev at %p\n", addr); return (DCMD_ERR); } mdb_inc_indent(4); mdb_printf("%%-?s %6s %20s %10s %9s%\n", "ADDR", "ID", "OFFSET", "FREE", "FRAGMENTATION"); vdev_ms = mdb_alloc(vdev.vdev_ms_count * sizeof (void *), UM_SLEEP | UM_GC); if (mdb_vread(vdev_ms, vdev.vdev_ms_count * sizeof (void *), (uintptr_t)vdev.vdev_ms) == -1) { mdb_warn("failed to read vdev_ms at %p\n", vdev.vdev_ms); return (DCMD_ERR); } for (int m = 0; m < vdev.vdev_ms_count; m++) { mdb_metaslab_t ms; mdb_space_map_t sm = { 0 }; char free[NICENUM_BUFLEN]; if (mdb_ctf_vread(&ms, "metaslab_t", "mdb_metaslab_t", (uintptr_t)vdev_ms[m], 0) == -1) return (DCMD_ERR); if (ms.ms_sm != NULL && mdb_ctf_vread(&sm, "space_map_t", "mdb_space_map_t", ms.ms_sm, 0) == -1) return (DCMD_ERR); mdb_nicenum(ms.ms_size - sm.sm_alloc, free); mdb_printf("%0?p %6llu %20llx %10s ", vdev_ms[m], ms.ms_id, ms.ms_start, free); if (ms.ms_fragmentation == ZFS_FRAG_INVALID) mdb_printf("%9s\n", "-"); else mdb_printf("%9llu%%\n", ms.ms_fragmentation); if ((spa_flags & SPA_FLAG_HISTOGRAMS) && ms.ms_sm != NULL) { mdb_space_map_phys_t smp; if (sm.sm_phys == NULL) continue; (void) mdb_ctf_vread(&smp, "space_map_phys_t", "mdb_space_map_phys_t", sm.sm_phys, 0); dump_histogram(smp.smp_histogram, SPACE_MAP_HISTOGRAM_SIZE, sm.sm_shift); } } mdb_dec_indent(4); return (DCMD_OK); } static int metaslab_group_stats(uintptr_t addr, int spa_flags) { mdb_metaslab_group_t mg; if (mdb_ctf_vread(&mg, "metaslab_group_t", "mdb_metaslab_group_t", (uintptr_t)addr, 0) == -1) { mdb_warn("failed to read vdev_mg at %p\n", addr); return (DCMD_ERR); } mdb_inc_indent(4); mdb_printf("%%-?s %15s%\n", "ADDR", "FRAGMENTATION"); if (mg.mg_fragmentation == ZFS_FRAG_INVALID) mdb_printf("%0?p %15s\n", addr, "-"); else mdb_printf("%0?p %15llu%%\n", addr, mg.mg_fragmentation); if (spa_flags & SPA_FLAG_HISTOGRAMS) dump_histogram(mg.mg_histogram, RANGE_TREE_HISTOGRAM_SIZE, 0); mdb_dec_indent(4); return (DCMD_OK); } /* * ::vdev * * Print out a summarized vdev_t, in the following form: * * ADDR STATE AUX DESC * fffffffbcde23df0 HEALTHY - /dev/dsk/c0t0d0 * * If '-r' is specified, recursively visit all children. * * With '-e', the statistics associated with the vdev are printed as well. */ static int do_print_vdev(uintptr_t addr, int flags, int depth, boolean_t recursive, int spa_flags) { vdev_t vdev; char desc[MAXNAMELEN]; int c, children; uintptr_t *child; const char *state, *aux; if (mdb_vread(&vdev, sizeof (vdev), (uintptr_t)addr) == -1) { mdb_warn("failed to read vdev_t at %p\n", (uintptr_t)addr); return (DCMD_ERR); } if (flags & DCMD_PIPE_OUT) { mdb_printf("%#lr\n", addr); } else { if (vdev.vdev_path != NULL) { if (mdb_readstr(desc, sizeof (desc), (uintptr_t)vdev.vdev_path) == -1) { mdb_warn("failed to read vdev_path at %p\n", vdev.vdev_path); return (DCMD_ERR); } } else if (vdev.vdev_ops != NULL) { vdev_ops_t ops; if (mdb_vread(&ops, sizeof (ops), (uintptr_t)vdev.vdev_ops) == -1) { mdb_warn("failed to read vdev_ops at %p\n", vdev.vdev_ops); return (DCMD_ERR); } (void) strcpy(desc, ops.vdev_op_type); } else { (void) strcpy(desc, ""); } if (depth == 0 && DCMD_HDRSPEC(flags)) mdb_printf("%%-?s %-9s %-12s %-*s%\n", "ADDR", "STATE", "AUX", sizeof (uintptr_t) == 4 ? 43 : 35, "DESCRIPTION"); mdb_printf("%0?p ", addr); switch (vdev.vdev_state) { case VDEV_STATE_CLOSED: state = "CLOSED"; break; case VDEV_STATE_OFFLINE: state = "OFFLINE"; break; case VDEV_STATE_CANT_OPEN: state = "CANT_OPEN"; break; case VDEV_STATE_DEGRADED: state = "DEGRADED"; break; case VDEV_STATE_HEALTHY: state = "HEALTHY"; break; case VDEV_STATE_REMOVED: state = "REMOVED"; break; case VDEV_STATE_FAULTED: state = "FAULTED"; break; default: state = "UNKNOWN"; break; } switch (vdev.vdev_stat.vs_aux) { case VDEV_AUX_NONE: aux = "-"; break; case VDEV_AUX_OPEN_FAILED: aux = "OPEN_FAILED"; break; case VDEV_AUX_CORRUPT_DATA: aux = "CORRUPT_DATA"; break; case VDEV_AUX_NO_REPLICAS: aux = "NO_REPLICAS"; break; case VDEV_AUX_BAD_GUID_SUM: aux = "BAD_GUID_SUM"; break; case VDEV_AUX_TOO_SMALL: aux = "TOO_SMALL"; break; case VDEV_AUX_BAD_LABEL: aux = "BAD_LABEL"; break; case VDEV_AUX_VERSION_NEWER: aux = "VERS_NEWER"; break; case VDEV_AUX_VERSION_OLDER: aux = "VERS_OLDER"; break; case VDEV_AUX_UNSUP_FEAT: aux = "UNSUP_FEAT"; break; case VDEV_AUX_SPARED: aux = "SPARED"; break; case VDEV_AUX_ERR_EXCEEDED: aux = "ERR_EXCEEDED"; break; case VDEV_AUX_IO_FAILURE: aux = "IO_FAILURE"; break; case VDEV_AUX_BAD_LOG: aux = "BAD_LOG"; break; case VDEV_AUX_EXTERNAL: aux = "EXTERNAL"; break; case VDEV_AUX_SPLIT_POOL: aux = "SPLIT_POOL"; break; default: aux = "UNKNOWN"; break; } mdb_printf("%-9s %-12s %*s%s\n", state, aux, depth, "", desc); if (spa_flags & SPA_FLAG_ERRORS) { vdev_stat_t *vs = &vdev.vdev_stat; int i; mdb_inc_indent(4); mdb_printf("\n"); mdb_printf("% %12s %12s %12s %12s " "%12s%\n", "READ", "WRITE", "FREE", "CLAIM", "IOCTL"); mdb_printf("OPS "); for (i = 1; i < ZIO_TYPES; i++) mdb_printf("%11#llx%s", vs->vs_ops[i], i == ZIO_TYPES - 1 ? "" : " "); mdb_printf("\n"); mdb_printf("BYTES "); for (i = 1; i < ZIO_TYPES; i++) mdb_printf("%11#llx%s", vs->vs_bytes[i], i == ZIO_TYPES - 1 ? "" : " "); mdb_printf("\n"); mdb_printf("EREAD %10#llx\n", vs->vs_read_errors); mdb_printf("EWRITE %10#llx\n", vs->vs_write_errors); mdb_printf("ECKSUM %10#llx\n", vs->vs_checksum_errors); mdb_dec_indent(4); mdb_printf("\n"); } if (spa_flags & SPA_FLAG_METASLAB_GROUPS && vdev.vdev_mg != NULL) { metaslab_group_stats((uintptr_t)vdev.vdev_mg, spa_flags); } if (spa_flags & SPA_FLAG_METASLABS && vdev.vdev_ms != NULL) { metaslab_stats((uintptr_t)addr, spa_flags); } } children = vdev.vdev_children; if (children == 0 || !recursive) return (DCMD_OK); child = mdb_alloc(children * sizeof (void *), UM_SLEEP | UM_GC); if (mdb_vread(child, children * sizeof (void *), (uintptr_t)vdev.vdev_child) == -1) { mdb_warn("failed to read vdev children at %p", vdev.vdev_child); return (DCMD_ERR); } for (c = 0; c < children; c++) { if (do_print_vdev(child[c], flags, depth + 2, recursive, spa_flags)) { return (DCMD_ERR); } } return (DCMD_OK); } static int vdev_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) { uint64_t depth = 0; boolean_t recursive = B_FALSE; int spa_flags = 0; if (mdb_getopts(argc, argv, 'e', MDB_OPT_SETBITS, SPA_FLAG_ERRORS, &spa_flags, 'm', MDB_OPT_SETBITS, SPA_FLAG_METASLABS, &spa_flags, 'M', MDB_OPT_SETBITS, SPA_FLAG_METASLAB_GROUPS, &spa_flags, 'h', MDB_OPT_SETBITS, SPA_FLAG_HISTOGRAMS, &spa_flags, 'r', MDB_OPT_SETBITS, TRUE, &recursive, 'd', MDB_OPT_UINT64, &depth, NULL) != argc) return (DCMD_USAGE); if (!(flags & DCMD_ADDRSPEC)) { mdb_warn("no vdev_t address given\n"); return (DCMD_ERR); } return (do_print_vdev(addr, flags, (int)depth, recursive, spa_flags)); } typedef struct metaslab_walk_data { uint64_t mw_numvdevs; uintptr_t *mw_vdevs; int mw_curvdev; uint64_t mw_nummss; uintptr_t *mw_mss; int mw_curms; } metaslab_walk_data_t; static int metaslab_walk_step(mdb_walk_state_t *wsp) { metaslab_walk_data_t *mw = wsp->walk_data; metaslab_t ms; uintptr_t msp; if (mw->mw_curvdev >= mw->mw_numvdevs) return (WALK_DONE); if (mw->mw_mss == NULL) { uintptr_t mssp; uintptr_t vdevp; ASSERT(mw->mw_curms == 0); ASSERT(mw->mw_nummss == 0); vdevp = mw->mw_vdevs[mw->mw_curvdev]; if (GETMEMB(vdevp, "vdev", vdev_ms, mssp) || GETMEMB(vdevp, "vdev", vdev_ms_count, mw->mw_nummss)) { return (WALK_ERR); } mw->mw_mss = mdb_alloc(mw->mw_nummss * sizeof (void*), UM_SLEEP | UM_GC); if (mdb_vread(mw->mw_mss, mw->mw_nummss * sizeof (void*), mssp) == -1) { mdb_warn("failed to read vdev_ms at %p", mssp); return (WALK_ERR); } } if (mw->mw_curms >= mw->mw_nummss) { mw->mw_mss = NULL; mw->mw_curms = 0; mw->mw_nummss = 0; mw->mw_curvdev++; return (WALK_NEXT); } msp = mw->mw_mss[mw->mw_curms]; if (mdb_vread(&ms, sizeof (metaslab_t), msp) == -1) { mdb_warn("failed to read metaslab_t at %p", msp); return (WALK_ERR); } mw->mw_curms++; return (wsp->walk_callback(msp, &ms, wsp->walk_cbdata)); } /* ARGSUSED */ static int metaslab_walk_init(mdb_walk_state_t *wsp) { metaslab_walk_data_t *mw; uintptr_t root_vdevp; uintptr_t childp; if (wsp->walk_addr == NULL) { mdb_warn("must supply address of spa_t\n"); return (WALK_ERR); } mw = mdb_zalloc(sizeof (metaslab_walk_data_t), UM_SLEEP | UM_GC); if (GETMEMB(wsp->walk_addr, "spa", spa_root_vdev, root_vdevp) || GETMEMB(root_vdevp, "vdev", vdev_children, mw->mw_numvdevs) || GETMEMB(root_vdevp, "vdev", vdev_child, childp)) { return (DCMD_ERR); } mw->mw_vdevs = mdb_alloc(mw->mw_numvdevs * sizeof (void *), UM_SLEEP | UM_GC); if (mdb_vread(mw->mw_vdevs, mw->mw_numvdevs * sizeof (void *), childp) == -1) { mdb_warn("failed to read root vdev children at %p", childp); return (DCMD_ERR); } wsp->walk_data = mw; return (WALK_NEXT); } typedef struct mdb_spa { uintptr_t spa_dsl_pool; uintptr_t spa_root_vdev; } mdb_spa_t; typedef struct mdb_dsl_pool { uintptr_t dp_root_dir; } mdb_dsl_pool_t; typedef struct mdb_dsl_dir { uintptr_t dd_dbuf; int64_t dd_space_towrite[TXG_SIZE]; } mdb_dsl_dir_t; typedef struct mdb_dsl_dir_phys { uint64_t dd_used_bytes; uint64_t dd_compressed_bytes; uint64_t dd_uncompressed_bytes; } mdb_dsl_dir_phys_t; typedef struct space_data { uint64_t ms_alloctree[TXG_SIZE]; uint64_t ms_freetree[TXG_SIZE]; uint64_t ms_tree; uint64_t avail; uint64_t nowavail; } space_data_t; /* ARGSUSED */ static int space_cb(uintptr_t addr, const void *unknown, void *arg) { space_data_t *sd = arg; mdb_metaslab_t ms; mdb_range_tree_t rt; mdb_space_map_t sm = { 0 }; mdb_space_map_phys_t smp = { 0 }; int i; if (mdb_ctf_vread(&ms, "metaslab_t", "mdb_metaslab_t", addr, 0) == -1) return (WALK_ERR); for (i = 0; i < TXG_SIZE; i++) { if (mdb_ctf_vread(&rt, "range_tree_t", "mdb_range_tree_t", ms.ms_alloctree[i], 0) == -1) return (WALK_ERR); sd->ms_alloctree[i] += rt.rt_space; if (mdb_ctf_vread(&rt, "range_tree_t", "mdb_range_tree_t", ms.ms_freetree[i], 0) == -1) return (WALK_ERR); sd->ms_freetree[i] += rt.rt_space; } if (mdb_ctf_vread(&rt, "range_tree_t", "mdb_range_tree_t", ms.ms_tree, 0) == -1) return (WALK_ERR); if (ms.ms_sm != NULL && mdb_ctf_vread(&sm, "space_map_t", "mdb_space_map_t", ms.ms_sm, 0) == -1) return (WALK_ERR); if (sm.sm_phys != NULL) { (void) mdb_ctf_vread(&smp, "space_map_phys_t", "mdb_space_map_phys_t", sm.sm_phys, 0); } sd->ms_tree += rt.rt_space; sd->avail += sm.sm_size - sm.sm_alloc; sd->nowavail += sm.sm_size - smp.smp_alloc; return (WALK_NEXT); } /* * ::spa_space [-b] * * Given a spa_t, print out it's on-disk space usage and in-core * estimates of future usage. If -b is given, print space in bytes. * Otherwise print in megabytes. */ /* ARGSUSED */ static int spa_space(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) { mdb_spa_t spa; mdb_dsl_pool_t dp; mdb_dsl_dir_t dd; mdb_dmu_buf_impl_t db; mdb_dsl_dir_phys_t dsp; space_data_t sd; int shift = 20; char *suffix = "M"; int bytes = B_FALSE; if (mdb_getopts(argc, argv, 'b', MDB_OPT_SETBITS, TRUE, &bytes, NULL) != argc) return (DCMD_USAGE); if (!(flags & DCMD_ADDRSPEC)) return (DCMD_USAGE); if (bytes) { shift = 0; suffix = ""; } if (mdb_ctf_vread(&spa, ZFS_STRUCT "spa", "mdb_spa_t", addr, 0) == -1 || mdb_ctf_vread(&dp, ZFS_STRUCT "dsl_pool", "mdb_dsl_pool_t", spa.spa_dsl_pool, 0) == -1 || mdb_ctf_vread(&dd, ZFS_STRUCT "dsl_dir", "mdb_dsl_dir_t", dp.dp_root_dir, 0) == -1 || mdb_ctf_vread(&db, ZFS_STRUCT "dmu_buf_impl", "mdb_dmu_buf_impl_t", dd.dd_dbuf, 0) == -1 || mdb_ctf_vread(&dsp, ZFS_STRUCT "dsl_dir_phys", "mdb_dsl_dir_phys_t", db.db.db_data, 0) == -1) { return (DCMD_ERR); } mdb_printf("dd_space_towrite = %llu%s %llu%s %llu%s %llu%s\n", dd.dd_space_towrite[0] >> shift, suffix, dd.dd_space_towrite[1] >> shift, suffix, dd.dd_space_towrite[2] >> shift, suffix, dd.dd_space_towrite[3] >> shift, suffix); mdb_printf("dd_phys.dd_used_bytes = %llu%s\n", dsp.dd_used_bytes >> shift, suffix); mdb_printf("dd_phys.dd_compressed_bytes = %llu%s\n", dsp.dd_compressed_bytes >> shift, suffix); mdb_printf("dd_phys.dd_uncompressed_bytes = %llu%s\n", dsp.dd_uncompressed_bytes >> shift, suffix); bzero(&sd, sizeof (sd)); if (mdb_pwalk("metaslab", space_cb, &sd, addr) != 0) { mdb_warn("can't walk metaslabs"); return (DCMD_ERR); } mdb_printf("ms_allocmap = %llu%s %llu%s %llu%s %llu%s\n", sd.ms_alloctree[0] >> shift, suffix, sd.ms_alloctree[1] >> shift, suffix, sd.ms_alloctree[2] >> shift, suffix, sd.ms_alloctree[3] >> shift, suffix); mdb_printf("ms_freemap = %llu%s %llu%s %llu%s %llu%s\n", sd.ms_freetree[0] >> shift, suffix, sd.ms_freetree[1] >> shift, suffix, sd.ms_freetree[2] >> shift, suffix, sd.ms_freetree[3] >> shift, suffix); mdb_printf("ms_tree = %llu%s\n", sd.ms_tree >> shift, suffix); mdb_printf("last synced avail = %llu%s\n", sd.avail >> shift, suffix); mdb_printf("current syncing avail = %llu%s\n", sd.nowavail >> shift, suffix); return (DCMD_OK); } typedef struct mdb_spa_aux_vdev { int sav_count; uintptr_t sav_vdevs; } mdb_spa_aux_vdev_t; typedef struct mdb_spa_vdevs { uintptr_t spa_root_vdev; mdb_spa_aux_vdev_t spa_l2cache; mdb_spa_aux_vdev_t spa_spares; } mdb_spa_vdevs_t; static int spa_print_aux(mdb_spa_aux_vdev_t *sav, uint_t flags, mdb_arg_t *v, const char *name) { uintptr_t *aux; size_t len; int ret, i; /* * Iterate over aux vdevs and print those out as well. This is a * little annoying because we don't have a root vdev to pass to ::vdev. * Instead, we print a single line and then call it for each child * vdev. */ if (sav->sav_count != 0) { v[1].a_type = MDB_TYPE_STRING; v[1].a_un.a_str = "-d"; v[2].a_type = MDB_TYPE_IMMEDIATE; v[2].a_un.a_val = 2; len = sav->sav_count * sizeof (uintptr_t); aux = mdb_alloc(len, UM_SLEEP); if (mdb_vread(aux, len, sav->sav_vdevs) == -1) { mdb_free(aux, len); mdb_warn("failed to read l2cache vdevs at %p", sav->sav_vdevs); return (DCMD_ERR); } mdb_printf("%-?s %-9s %-12s %s\n", "-", "-", "-", name); for (i = 0; i < sav->sav_count; i++) { ret = mdb_call_dcmd("vdev", aux[i], flags, 3, v); if (ret != DCMD_OK) { mdb_free(aux, len); return (ret); } } mdb_free(aux, len); } return (0); } /* * ::spa_vdevs * * -e Include error stats * -m Include metaslab information * -M Include metaslab group information * -h Include histogram information (requires -m or -M) * * Print out a summarized list of vdevs for the given spa_t. * This is accomplished by invoking "::vdev -re" on the root vdev, as well as * iterating over the cache devices. */ /* ARGSUSED */ static int spa_vdevs(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) { mdb_arg_t v[3]; int ret; char opts[100] = "-r"; int spa_flags = 0; if (mdb_getopts(argc, argv, 'e', MDB_OPT_SETBITS, SPA_FLAG_ERRORS, &spa_flags, 'm', MDB_OPT_SETBITS, SPA_FLAG_METASLABS, &spa_flags, 'M', MDB_OPT_SETBITS, SPA_FLAG_METASLAB_GROUPS, &spa_flags, 'h', MDB_OPT_SETBITS, SPA_FLAG_HISTOGRAMS, &spa_flags, NULL) != argc) return (DCMD_USAGE); if (!(flags & DCMD_ADDRSPEC)) return (DCMD_USAGE); mdb_spa_vdevs_t spa; if (mdb_ctf_vread(&spa, "spa_t", "mdb_spa_vdevs_t", addr, 0) == -1) return (DCMD_ERR); /* * Unitialized spa_t structures can have a NULL root vdev. */ if (spa.spa_root_vdev == NULL) { mdb_printf("no associated vdevs\n"); return (DCMD_OK); } if (spa_flags & SPA_FLAG_ERRORS) strcat(opts, "e"); if (spa_flags & SPA_FLAG_METASLABS) strcat(opts, "m"); if (spa_flags & SPA_FLAG_METASLAB_GROUPS) strcat(opts, "M"); if (spa_flags & SPA_FLAG_HISTOGRAMS) strcat(opts, "h"); v[0].a_type = MDB_TYPE_STRING; v[0].a_un.a_str = opts; ret = mdb_call_dcmd("vdev", (uintptr_t)spa.spa_root_vdev, flags, 1, v); if (ret != DCMD_OK) return (ret); if (spa_print_aux(&spa.spa_l2cache, flags, v, "cache") != 0 || spa_print_aux(&spa.spa_spares, flags, v, "spares") != 0) return (DCMD_ERR); return (DCMD_OK); } /* * ::zio * * Print a summary of zio_t and all its children. This is intended to display a * zio tree, and hence we only pick the most important pieces of information for * the main summary. More detailed information can always be found by doing a * '::print zio' on the underlying zio_t. The columns we display are: * * ADDRESS TYPE STAGE WAITER TIME_ELAPSED * * The 'address' column is indented by one space for each depth level as we * descend down the tree. */ #define ZIO_MAXINDENT 7 #define ZIO_MAXWIDTH (sizeof (uintptr_t) * 2 + ZIO_MAXINDENT) #define ZIO_WALK_SELF 0 #define ZIO_WALK_CHILD 1 #define ZIO_WALK_PARENT 2 typedef struct zio_print_args { int zpa_current_depth; int zpa_min_depth; int zpa_max_depth; int zpa_type; uint_t zpa_flags; } zio_print_args_t; typedef struct mdb_zio { enum zio_type io_type; enum zio_stage io_stage; uintptr_t io_waiter; uintptr_t io_spa; struct { struct { uintptr_t list_next; } list_head; } io_parent_list; int io_error; } mdb_zio_t; typedef struct mdb_zio_timestamp { hrtime_t io_timestamp; } mdb_zio_timestamp_t; static int zio_child_cb(uintptr_t addr, const void *unknown, void *arg); static int zio_print_cb(uintptr_t addr, zio_print_args_t *zpa) { mdb_ctf_id_t type_enum, stage_enum; int indent = zpa->zpa_current_depth; const char *type, *stage; uintptr_t laddr; mdb_zio_t zio; mdb_zio_timestamp_t zio_timestamp = { 0 }; if (mdb_ctf_vread(&zio, ZFS_STRUCT "zio", "mdb_zio_t", addr, 0) == -1) return (WALK_ERR); (void) mdb_ctf_vread(&zio_timestamp, ZFS_STRUCT "zio", "mdb_zio_timestamp_t", addr, MDB_CTF_VREAD_QUIET); if (indent > ZIO_MAXINDENT) indent = ZIO_MAXINDENT; if (mdb_ctf_lookup_by_name("enum zio_type", &type_enum) == -1 || mdb_ctf_lookup_by_name("enum zio_stage", &stage_enum) == -1) { mdb_warn("failed to lookup zio enums"); return (WALK_ERR); } if ((type = mdb_ctf_enum_name(type_enum, zio.io_type)) != NULL) type += sizeof ("ZIO_TYPE_") - 1; else type = "?"; if (zio.io_error == 0) { stage = mdb_ctf_enum_name(stage_enum, zio.io_stage); if (stage != NULL) stage += sizeof ("ZIO_STAGE_") - 1; else stage = "?"; } else { stage = "FAILED"; } if (zpa->zpa_current_depth >= zpa->zpa_min_depth) { if (zpa->zpa_flags & DCMD_PIPE_OUT) { mdb_printf("%?p\n", addr); } else { mdb_printf("%*s%-*p %-5s %-16s ", indent, "", ZIO_MAXWIDTH - indent, addr, type, stage); if (zio.io_waiter != 0) mdb_printf("%-16lx ", zio.io_waiter); else mdb_printf("%-16s ", "-"); #ifdef _KERNEL if (zio_timestamp.io_timestamp != 0) { mdb_printf("%llums", (mdb_gethrtime() - zio_timestamp.io_timestamp) / 1000000); } else { mdb_printf("%-12s ", "-"); } #else mdb_printf("%-12s ", "-"); #endif mdb_printf("\n"); } } if (zpa->zpa_current_depth >= zpa->zpa_max_depth) return (WALK_NEXT); if (zpa->zpa_type == ZIO_WALK_PARENT) laddr = addr + mdb_ctf_offsetof_by_name(ZFS_STRUCT "zio", "io_parent_list"); else laddr = addr + mdb_ctf_offsetof_by_name(ZFS_STRUCT "zio", "io_child_list"); zpa->zpa_current_depth++; if (mdb_pwalk("list", zio_child_cb, zpa, laddr) != 0) { mdb_warn("failed to walk zio_t children at %p\n", laddr); return (WALK_ERR); } zpa->zpa_current_depth--; return (WALK_NEXT); } /* ARGSUSED */ static int zio_child_cb(uintptr_t addr, const void *unknown, void *arg) { zio_link_t zl; uintptr_t ziop; zio_print_args_t *zpa = arg; if (mdb_vread(&zl, sizeof (zl), addr) == -1) { mdb_warn("failed to read zio_link_t at %p", addr); return (WALK_ERR); } if (zpa->zpa_type == ZIO_WALK_PARENT) ziop = (uintptr_t)zl.zl_parent; else ziop = (uintptr_t)zl.zl_child; return (zio_print_cb(ziop, zpa)); } /* ARGSUSED */ static int zio_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) { zio_print_args_t zpa = { 0 }; if (!(flags & DCMD_ADDRSPEC)) return (DCMD_USAGE); if (mdb_getopts(argc, argv, 'r', MDB_OPT_SETBITS, INT_MAX, &zpa.zpa_max_depth, 'c', MDB_OPT_SETBITS, ZIO_WALK_CHILD, &zpa.zpa_type, 'p', MDB_OPT_SETBITS, ZIO_WALK_PARENT, &zpa.zpa_type, NULL) != argc) return (DCMD_USAGE); zpa.zpa_flags = flags; if (zpa.zpa_max_depth != 0) { if (zpa.zpa_type == ZIO_WALK_SELF) zpa.zpa_type = ZIO_WALK_CHILD; } else if (zpa.zpa_type != ZIO_WALK_SELF) { zpa.zpa_min_depth = 1; zpa.zpa_max_depth = 1; } if (!(flags & DCMD_PIPE_OUT) && DCMD_HDRSPEC(flags)) { mdb_printf("%%-*s %-5s %-16s %-16s %-12s%\n", ZIO_MAXWIDTH, "ADDRESS", "TYPE", "STAGE", "WAITER", "TIME_ELAPSED"); } if (zio_print_cb(addr, &zpa) != WALK_NEXT) return (DCMD_ERR); return (DCMD_OK); } /* * [addr]::zio_state * * Print a summary of all zio_t structures on the system, or for a particular * pool. This is equivalent to '::walk zio_root | ::zio'. */ /*ARGSUSED*/ static int zio_state(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) { /* * MDB will remember the last address of the pipeline, so if we don't * zero this we'll end up trying to walk zio structures for a * non-existent spa_t. */ if (!(flags & DCMD_ADDRSPEC)) addr = 0; return (mdb_pwalk_dcmd("zio_root", "zio", argc, argv, addr)); } typedef struct txg_list_walk_data { uintptr_t lw_head[TXG_SIZE]; int lw_txgoff; int lw_maxoff; size_t lw_offset; void *lw_obj; } txg_list_walk_data_t; static int txg_list_walk_init_common(mdb_walk_state_t *wsp, int txg, int maxoff) { txg_list_walk_data_t *lwd; txg_list_t list; int i; lwd = mdb_alloc(sizeof (txg_list_walk_data_t), UM_SLEEP | UM_GC); if (mdb_vread(&list, sizeof (txg_list_t), wsp->walk_addr) == -1) { mdb_warn("failed to read txg_list_t at %#lx", wsp->walk_addr); return (WALK_ERR); } for (i = 0; i < TXG_SIZE; i++) lwd->lw_head[i] = (uintptr_t)list.tl_head[i]; lwd->lw_offset = list.tl_offset; lwd->lw_obj = mdb_alloc(lwd->lw_offset + sizeof (txg_node_t), UM_SLEEP | UM_GC); lwd->lw_txgoff = txg; lwd->lw_maxoff = maxoff; wsp->walk_addr = lwd->lw_head[lwd->lw_txgoff]; wsp->walk_data = lwd; return (WALK_NEXT); } static int txg_list_walk_init(mdb_walk_state_t *wsp) { return (txg_list_walk_init_common(wsp, 0, TXG_SIZE-1)); } static int txg_list0_walk_init(mdb_walk_state_t *wsp) { return (txg_list_walk_init_common(wsp, 0, 0)); } static int txg_list1_walk_init(mdb_walk_state_t *wsp) { return (txg_list_walk_init_common(wsp, 1, 1)); } static int txg_list2_walk_init(mdb_walk_state_t *wsp) { return (txg_list_walk_init_common(wsp, 2, 2)); } static int txg_list3_walk_init(mdb_walk_state_t *wsp) { return (txg_list_walk_init_common(wsp, 3, 3)); } static int txg_list_walk_step(mdb_walk_state_t *wsp) { txg_list_walk_data_t *lwd = wsp->walk_data; uintptr_t addr; txg_node_t *node; int status; while (wsp->walk_addr == NULL && lwd->lw_txgoff < lwd->lw_maxoff) { lwd->lw_txgoff++; wsp->walk_addr = lwd->lw_head[lwd->lw_txgoff]; } if (wsp->walk_addr == NULL) return (WALK_DONE); addr = wsp->walk_addr - lwd->lw_offset; if (mdb_vread(lwd->lw_obj, lwd->lw_offset + sizeof (txg_node_t), addr) == -1) { mdb_warn("failed to read list element at %#lx", addr); return (WALK_ERR); } status = wsp->walk_callback(addr, lwd->lw_obj, wsp->walk_cbdata); node = (txg_node_t *)((uintptr_t)lwd->lw_obj + lwd->lw_offset); wsp->walk_addr = (uintptr_t)node->tn_next[lwd->lw_txgoff]; return (status); } /* * ::walk spa * * Walk all named spa_t structures in the namespace. This is nothing more than * a layered avl walk. */ static int spa_walk_init(mdb_walk_state_t *wsp) { GElf_Sym sym; if (wsp->walk_addr != NULL) { mdb_warn("spa walk only supports global walks\n"); return (WALK_ERR); } if (mdb_lookup_by_obj(ZFS_OBJ_NAME, "spa_namespace_avl", &sym) == -1) { mdb_warn("failed to find symbol 'spa_namespace_avl'"); return (WALK_ERR); } wsp->walk_addr = (uintptr_t)sym.st_value; if (mdb_layered_walk("avl", wsp) == -1) { mdb_warn("failed to walk 'avl'\n"); return (WALK_ERR); } return (WALK_NEXT); } static int spa_walk_step(mdb_walk_state_t *wsp) { return (wsp->walk_callback(wsp->walk_addr, NULL, wsp->walk_cbdata)); } /* * [addr]::walk zio * * Walk all active zio_t structures on the system. This is simply a layered * walk on top of ::walk zio_cache, with the optional ability to limit the * structures to a particular pool. */ static int zio_walk_init(mdb_walk_state_t *wsp) { wsp->walk_data = (void *)wsp->walk_addr; if (mdb_layered_walk("zio_cache", wsp) == -1) { mdb_warn("failed to walk 'zio_cache'\n"); return (WALK_ERR); } return (WALK_NEXT); } static int zio_walk_step(mdb_walk_state_t *wsp) { mdb_zio_t zio; uintptr_t spa = (uintptr_t)wsp->walk_data; if (mdb_ctf_vread(&zio, ZFS_STRUCT "zio", "mdb_zio_t", wsp->walk_addr, 0) == -1) return (WALK_ERR); if (spa != 0 && spa != zio.io_spa) return (WALK_NEXT); return (wsp->walk_callback(wsp->walk_addr, &zio, wsp->walk_cbdata)); } /* * [addr]::walk zio_root * * Walk only root zio_t structures, optionally for a particular spa_t. */ static int zio_walk_root_step(mdb_walk_state_t *wsp) { mdb_zio_t zio; uintptr_t spa = (uintptr_t)wsp->walk_data; if (mdb_ctf_vread(&zio, ZFS_STRUCT "zio", "mdb_zio_t", wsp->walk_addr, 0) == -1) return (WALK_ERR); if (spa != 0 && spa != zio.io_spa) return (WALK_NEXT); /* If the parent list is not empty, ignore */ if (zio.io_parent_list.list_head.list_next != wsp->walk_addr + mdb_ctf_offsetof_by_name(ZFS_STRUCT "zio", "io_parent_list") + mdb_ctf_offsetof_by_name("struct list", "list_head")) return (WALK_NEXT); return (wsp->walk_callback(wsp->walk_addr, &zio, wsp->walk_cbdata)); } /* * ::zfs_blkstats * * -v print verbose per-level information * */ static int zfs_blkstats(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) { boolean_t verbose = B_FALSE; zfs_all_blkstats_t stats; dmu_object_type_t t; zfs_blkstat_t *tzb; uint64_t ditto; dmu_object_type_info_t dmu_ot[DMU_OT_NUMTYPES + 10]; /* +10 in case it grew */ if (mdb_readvar(&dmu_ot, "dmu_ot") == -1) { mdb_warn("failed to read 'dmu_ot'"); return (DCMD_ERR); } if (mdb_getopts(argc, argv, 'v', MDB_OPT_SETBITS, TRUE, &verbose, NULL) != argc) return (DCMD_USAGE); if (!(flags & DCMD_ADDRSPEC)) return (DCMD_USAGE); if (GETMEMB(addr, "spa", spa_dsl_pool, addr) || GETMEMB(addr, "dsl_pool", dp_blkstats, addr) || mdb_vread(&stats, sizeof (zfs_all_blkstats_t), addr) == -1) { mdb_warn("failed to read data at %p;", addr); mdb_printf("maybe no stats? run \"zpool scrub\" first."); return (DCMD_ERR); } tzb = &stats.zab_type[DN_MAX_LEVELS][DMU_OT_TOTAL]; if (tzb->zb_gangs != 0) { mdb_printf("Ganged blocks: %llu\n", (longlong_t)tzb->zb_gangs); } ditto = tzb->zb_ditto_2_of_2_samevdev + tzb->zb_ditto_2_of_3_samevdev + tzb->zb_ditto_3_of_3_samevdev; if (ditto != 0) { mdb_printf("Dittoed blocks on same vdev: %llu\n", (longlong_t)ditto); } mdb_printf("\nBlocks\tLSIZE\tPSIZE\tASIZE" "\t avg\t comp\t%%Total\tType\n"); for (t = 0; t <= DMU_OT_TOTAL; t++) { char csize[NICENUM_BUFLEN], lsize[NICENUM_BUFLEN]; char psize[NICENUM_BUFLEN], asize[NICENUM_BUFLEN]; char avg[NICENUM_BUFLEN]; char comp[NICENUM_BUFLEN], pct[NICENUM_BUFLEN]; char typename[64]; int l; if (t == DMU_OT_DEFERRED) strcpy(typename, "deferred free"); else if (t == DMU_OT_OTHER) strcpy(typename, "other"); else if (t == DMU_OT_TOTAL) strcpy(typename, "Total"); else if (mdb_readstr(typename, sizeof (typename), (uintptr_t)dmu_ot[t].ot_name) == -1) { mdb_warn("failed to read type name"); return (DCMD_ERR); } if (stats.zab_type[DN_MAX_LEVELS][t].zb_asize == 0) continue; for (l = -1; l < DN_MAX_LEVELS; l++) { int level = (l == -1 ? DN_MAX_LEVELS : l); zfs_blkstat_t *zb = &stats.zab_type[level][t]; if (zb->zb_asize == 0) continue; /* * Don't print each level unless requested. */ if (!verbose && level != DN_MAX_LEVELS) continue; /* * If all the space is level 0, don't print the * level 0 separately. */ if (level == 0 && zb->zb_asize == stats.zab_type[DN_MAX_LEVELS][t].zb_asize) continue; mdb_nicenum(zb->zb_count, csize); mdb_nicenum(zb->zb_lsize, lsize); mdb_nicenum(zb->zb_psize, psize); mdb_nicenum(zb->zb_asize, asize); mdb_nicenum(zb->zb_asize / zb->zb_count, avg); (void) snprintfrac(comp, NICENUM_BUFLEN, zb->zb_lsize, zb->zb_psize, 2); (void) snprintfrac(pct, NICENUM_BUFLEN, 100 * zb->zb_asize, tzb->zb_asize, 2); mdb_printf("%6s\t%5s\t%5s\t%5s\t%5s" "\t%5s\t%6s\t", csize, lsize, psize, asize, avg, comp, pct); if (level == DN_MAX_LEVELS) mdb_printf("%s\n", typename); else mdb_printf(" L%d %s\n", level, typename); } } return (DCMD_OK); } typedef struct mdb_reference { uintptr_t ref_holder; uintptr_t ref_removed; uint64_t ref_number; } mdb_reference_t; /* ARGSUSED */ static int reference_cb(uintptr_t addr, const void *ignored, void *arg) { mdb_reference_t ref; boolean_t holder_is_str = B_FALSE; char holder_str[128]; boolean_t removed = (boolean_t)arg; if (mdb_ctf_vread(&ref, "reference_t", "mdb_reference_t", addr, 0) == -1) return (DCMD_ERR); if (mdb_readstr(holder_str, sizeof (holder_str), ref.ref_holder) != -1) holder_is_str = strisprint(holder_str); if (removed) mdb_printf("removed "); mdb_printf("reference "); if (ref.ref_number != 1) mdb_printf("with count=%llu ", ref.ref_number); mdb_printf("with tag %lx", ref.ref_holder); if (holder_is_str) mdb_printf(" \"%s\"", holder_str); mdb_printf(", held at:\n"); (void) mdb_call_dcmd("whatis", addr, DCMD_ADDRSPEC, 0, NULL); if (removed) { mdb_printf("removed at:\n"); (void) mdb_call_dcmd("whatis", ref.ref_removed, DCMD_ADDRSPEC, 0, NULL); } mdb_printf("\n"); return (WALK_NEXT); } typedef struct mdb_refcount { uint64_t rc_count; } mdb_refcount_t; typedef struct mdb_refcount_removed { uint64_t rc_removed_count; } mdb_refcount_removed_t; typedef struct mdb_refcount_tracked { boolean_t rc_tracked; } mdb_refcount_tracked_t; /* ARGSUSED */ static int refcount(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) { mdb_refcount_t rc; mdb_refcount_removed_t rcr; mdb_refcount_tracked_t rct; int off; boolean_t released = B_FALSE; if (!(flags & DCMD_ADDRSPEC)) return (DCMD_USAGE); if (mdb_getopts(argc, argv, 'r', MDB_OPT_SETBITS, B_TRUE, &released, NULL) != argc) return (DCMD_USAGE); if (mdb_ctf_vread(&rc, "refcount_t", "mdb_refcount_t", addr, 0) == -1) return (DCMD_ERR); if (mdb_ctf_vread(&rcr, "refcount_t", "mdb_refcount_removed_t", addr, MDB_CTF_VREAD_QUIET) == -1) { mdb_printf("refcount_t at %p has %llu holds (untracked)\n", addr, (longlong_t)rc.rc_count); return (DCMD_OK); } if (mdb_ctf_vread(&rct, "refcount_t", "mdb_refcount_tracked_t", addr, MDB_CTF_VREAD_QUIET) == -1) { /* If this is an old target, it might be tracked. */ rct.rc_tracked = B_TRUE; } mdb_printf("refcount_t at %p has %llu current holds, " "%llu recently released holds\n", addr, (longlong_t)rc.rc_count, (longlong_t)rcr.rc_removed_count); if (rct.rc_tracked && rc.rc_count > 0) mdb_printf("current holds:\n"); off = mdb_ctf_offsetof_by_name("refcount_t", "rc_list"); if (off == -1) return (DCMD_ERR); mdb_pwalk("list", reference_cb, (void*)B_FALSE, addr + off); if (released && rcr.rc_removed_count > 0) { mdb_printf("released holds:\n"); off = mdb_ctf_offsetof_by_name("refcount_t", "rc_removed"); if (off == -1) return (DCMD_ERR); mdb_pwalk("list", reference_cb, (void*)B_TRUE, addr + off); } return (DCMD_OK); } /* ARGSUSED */ static int sa_attr_table(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) { sa_attr_table_t *table; sa_os_t sa_os; char *name; int i; if (mdb_vread(&sa_os, sizeof (sa_os_t), addr) == -1) { mdb_warn("failed to read sa_os at %p", addr); return (DCMD_ERR); } table = mdb_alloc(sizeof (sa_attr_table_t) * sa_os.sa_num_attrs, UM_SLEEP | UM_GC); name = mdb_alloc(MAXPATHLEN, UM_SLEEP | UM_GC); if (mdb_vread(table, sizeof (sa_attr_table_t) * sa_os.sa_num_attrs, (uintptr_t)sa_os.sa_attr_table) == -1) { mdb_warn("failed to read sa_os at %p", addr); return (DCMD_ERR); } mdb_printf("%%-10s %-10s %-10s %-10s %s%\n", "ATTR ID", "REGISTERED", "LENGTH", "BSWAP", "NAME"); for (i = 0; i != sa_os.sa_num_attrs; i++) { mdb_readstr(name, MAXPATHLEN, (uintptr_t)table[i].sa_name); mdb_printf("%5x %8x %8x %8x %-s\n", (int)table[i].sa_attr, (int)table[i].sa_registered, (int)table[i].sa_length, table[i].sa_byteswap, name); } return (DCMD_OK); } static int sa_get_off_table(uintptr_t addr, uint32_t **off_tab, int attr_count) { uintptr_t idx_table; if (GETMEMB(addr, "sa_idx_tab", sa_idx_tab, idx_table)) { mdb_printf("can't find offset table in sa_idx_tab\n"); return (-1); } *off_tab = mdb_alloc(attr_count * sizeof (uint32_t), UM_SLEEP | UM_GC); if (mdb_vread(*off_tab, attr_count * sizeof (uint32_t), idx_table) == -1) { mdb_warn("failed to attribute offset table %p", idx_table); return (-1); } return (DCMD_OK); } /*ARGSUSED*/ static int sa_attr_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) { uint32_t *offset_tab; int attr_count; uint64_t attr_id; uintptr_t attr_addr; uintptr_t bonus_tab, spill_tab; uintptr_t db_bonus, db_spill; uintptr_t os, os_sa; uintptr_t db_data; if (argc != 1) return (DCMD_USAGE); if (argv[0].a_type == MDB_TYPE_STRING) attr_id = mdb_strtoull(argv[0].a_un.a_str); else return (DCMD_USAGE); if (GETMEMB(addr, "sa_handle", sa_bonus_tab, bonus_tab) || GETMEMB(addr, "sa_handle", sa_spill_tab, spill_tab) || GETMEMB(addr, "sa_handle", sa_os, os) || GETMEMB(addr, "sa_handle", sa_bonus, db_bonus) || GETMEMB(addr, "sa_handle", sa_spill, db_spill)) { mdb_printf("Can't find necessary information in sa_handle " "in sa_handle\n"); return (DCMD_ERR); } if (GETMEMB(os, "objset", os_sa, os_sa)) { mdb_printf("Can't find os_sa in objset\n"); return (DCMD_ERR); } if (GETMEMB(os_sa, "sa_os", sa_num_attrs, attr_count)) { mdb_printf("Can't find sa_num_attrs\n"); return (DCMD_ERR); } if (attr_id > attr_count) { mdb_printf("attribute id number is out of range\n"); return (DCMD_ERR); } if (bonus_tab) { if (sa_get_off_table(bonus_tab, &offset_tab, attr_count) == -1) { return (DCMD_ERR); } if (GETMEMB(db_bonus, "dmu_buf", db_data, db_data)) { mdb_printf("can't find db_data in bonus dbuf\n"); return (DCMD_ERR); } } if (bonus_tab && !TOC_ATTR_PRESENT(offset_tab[attr_id]) && spill_tab == NULL) { mdb_printf("Attribute does not exist\n"); return (DCMD_ERR); } else if (!TOC_ATTR_PRESENT(offset_tab[attr_id]) && spill_tab) { if (sa_get_off_table(spill_tab, &offset_tab, attr_count) == -1) { return (DCMD_ERR); } if (GETMEMB(db_spill, "dmu_buf", db_data, db_data)) { mdb_printf("can't find db_data in spill dbuf\n"); return (DCMD_ERR); } if (!TOC_ATTR_PRESENT(offset_tab[attr_id])) { mdb_printf("Attribute does not exist\n"); return (DCMD_ERR); } } attr_addr = db_data + TOC_OFF(offset_tab[attr_id]); mdb_printf("%p\n", attr_addr); return (DCMD_OK); } /* ARGSUSED */ static int zfs_ace_print_common(uintptr_t addr, uint_t flags, uint64_t id, uint32_t access_mask, uint16_t ace_flags, uint16_t ace_type, int verbose) { if (DCMD_HDRSPEC(flags) && !verbose) mdb_printf("%%-?s %-8s %-8s %-8s %s%\n", "ADDR", "FLAGS", "MASK", "TYPE", "ID"); if (!verbose) { mdb_printf("%0?p %-8x %-8x %-8x %-llx\n", addr, ace_flags, access_mask, ace_type, id); return (DCMD_OK); } switch (ace_flags & ACE_TYPE_FLAGS) { case ACE_OWNER: mdb_printf("owner@:"); break; case (ACE_IDENTIFIER_GROUP | ACE_GROUP): mdb_printf("group@:"); break; case ACE_EVERYONE: mdb_printf("everyone@:"); break; case ACE_IDENTIFIER_GROUP: mdb_printf("group:%llx:", (u_longlong_t)id); break; case 0: /* User entry */ mdb_printf("user:%llx:", (u_longlong_t)id); break; } /* print out permission mask */ if (access_mask & ACE_READ_DATA) mdb_printf("r"); else mdb_printf("-"); if (access_mask & ACE_WRITE_DATA) mdb_printf("w"); else mdb_printf("-"); if (access_mask & ACE_EXECUTE) mdb_printf("x"); else mdb_printf("-"); if (access_mask & ACE_APPEND_DATA) mdb_printf("p"); else mdb_printf("-"); if (access_mask & ACE_DELETE) mdb_printf("d"); else mdb_printf("-"); if (access_mask & ACE_DELETE_CHILD) mdb_printf("D"); else mdb_printf("-"); if (access_mask & ACE_READ_ATTRIBUTES) mdb_printf("a"); else mdb_printf("-"); if (access_mask & ACE_WRITE_ATTRIBUTES) mdb_printf("A"); else mdb_printf("-"); if (access_mask & ACE_READ_NAMED_ATTRS) mdb_printf("R"); else mdb_printf("-"); if (access_mask & ACE_WRITE_NAMED_ATTRS) mdb_printf("W"); else mdb_printf("-"); if (access_mask & ACE_READ_ACL) mdb_printf("c"); else mdb_printf("-"); if (access_mask & ACE_WRITE_ACL) mdb_printf("C"); else mdb_printf("-"); if (access_mask & ACE_WRITE_OWNER) mdb_printf("o"); else mdb_printf("-"); if (access_mask & ACE_SYNCHRONIZE) mdb_printf("s"); else mdb_printf("-"); mdb_printf(":"); /* Print out inheritance flags */ if (ace_flags & ACE_FILE_INHERIT_ACE) mdb_printf("f"); else mdb_printf("-"); if (ace_flags & ACE_DIRECTORY_INHERIT_ACE) mdb_printf("d"); else mdb_printf("-"); if (ace_flags & ACE_INHERIT_ONLY_ACE) mdb_printf("i"); else mdb_printf("-"); if (ace_flags & ACE_NO_PROPAGATE_INHERIT_ACE) mdb_printf("n"); else mdb_printf("-"); if (ace_flags & ACE_SUCCESSFUL_ACCESS_ACE_FLAG) mdb_printf("S"); else mdb_printf("-"); if (ace_flags & ACE_FAILED_ACCESS_ACE_FLAG) mdb_printf("F"); else mdb_printf("-"); if (ace_flags & ACE_INHERITED_ACE) mdb_printf("I"); else mdb_printf("-"); switch (ace_type) { case ACE_ACCESS_ALLOWED_ACE_TYPE: mdb_printf(":allow\n"); break; case ACE_ACCESS_DENIED_ACE_TYPE: mdb_printf(":deny\n"); break; case ACE_SYSTEM_AUDIT_ACE_TYPE: mdb_printf(":audit\n"); break; case ACE_SYSTEM_ALARM_ACE_TYPE: mdb_printf(":alarm\n"); break; default: mdb_printf(":?\n"); } return (DCMD_OK); } /* ARGSUSED */ static int zfs_ace_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) { zfs_ace_t zace; int verbose = FALSE; uint64_t id; if (!(flags & DCMD_ADDRSPEC)) return (DCMD_USAGE); if (mdb_getopts(argc, argv, 'v', MDB_OPT_SETBITS, TRUE, &verbose, TRUE, NULL) != argc) return (DCMD_USAGE); if (mdb_vread(&zace, sizeof (zfs_ace_t), addr) == -1) { mdb_warn("failed to read zfs_ace_t"); return (DCMD_ERR); } if ((zace.z_hdr.z_flags & ACE_TYPE_FLAGS) == 0 || (zace.z_hdr.z_flags & ACE_TYPE_FLAGS) == ACE_IDENTIFIER_GROUP) id = zace.z_fuid; else id = -1; return (zfs_ace_print_common(addr, flags, id, zace.z_hdr.z_access_mask, zace.z_hdr.z_flags, zace.z_hdr.z_type, verbose)); } /* ARGSUSED */ static int zfs_ace0_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) { ace_t ace; uint64_t id; int verbose = FALSE; if (!(flags & DCMD_ADDRSPEC)) return (DCMD_USAGE); if (mdb_getopts(argc, argv, 'v', MDB_OPT_SETBITS, TRUE, &verbose, TRUE, NULL) != argc) return (DCMD_USAGE); if (mdb_vread(&ace, sizeof (ace_t), addr) == -1) { mdb_warn("failed to read ace_t"); return (DCMD_ERR); } if ((ace.a_flags & ACE_TYPE_FLAGS) == 0 || (ace.a_flags & ACE_TYPE_FLAGS) == ACE_IDENTIFIER_GROUP) id = ace.a_who; else id = -1; return (zfs_ace_print_common(addr, flags, id, ace.a_access_mask, ace.a_flags, ace.a_type, verbose)); } typedef struct acl_dump_args { int a_argc; const mdb_arg_t *a_argv; uint16_t a_version; int a_flags; } acl_dump_args_t; /* ARGSUSED */ static int acl_aces_cb(uintptr_t addr, const void *unknown, void *arg) { acl_dump_args_t *acl_args = (acl_dump_args_t *)arg; if (acl_args->a_version == 1) { if (mdb_call_dcmd("zfs_ace", addr, DCMD_ADDRSPEC|acl_args->a_flags, acl_args->a_argc, acl_args->a_argv) != DCMD_OK) { return (WALK_ERR); } } else { if (mdb_call_dcmd("zfs_ace0", addr, DCMD_ADDRSPEC|acl_args->a_flags, acl_args->a_argc, acl_args->a_argv) != DCMD_OK) { return (WALK_ERR); } } acl_args->a_flags = DCMD_LOOP; return (WALK_NEXT); } /* ARGSUSED */ static int acl_cb(uintptr_t addr, const void *unknown, void *arg) { acl_dump_args_t *acl_args = (acl_dump_args_t *)arg; if (acl_args->a_version == 1) { if (mdb_pwalk("zfs_acl_node_aces", acl_aces_cb, arg, addr) != 0) { mdb_warn("can't walk ACEs"); return (DCMD_ERR); } } else { if (mdb_pwalk("zfs_acl_node_aces0", acl_aces_cb, arg, addr) != 0) { mdb_warn("can't walk ACEs"); return (DCMD_ERR); } } return (WALK_NEXT); } /* ARGSUSED */ static int zfs_acl_dump(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) { zfs_acl_t zacl; int verbose = FALSE; acl_dump_args_t acl_args; if (!(flags & DCMD_ADDRSPEC)) return (DCMD_USAGE); if (mdb_getopts(argc, argv, 'v', MDB_OPT_SETBITS, TRUE, &verbose, TRUE, NULL) != argc) return (DCMD_USAGE); if (mdb_vread(&zacl, sizeof (zfs_acl_t), addr) == -1) { mdb_warn("failed to read zfs_acl_t"); return (DCMD_ERR); } acl_args.a_argc = argc; acl_args.a_argv = argv; acl_args.a_version = zacl.z_version; acl_args.a_flags = DCMD_LOOPFIRST; if (mdb_pwalk("zfs_acl_node", acl_cb, &acl_args, addr) != 0) { mdb_warn("can't walk ACL"); return (DCMD_ERR); } return (DCMD_OK); } /* ARGSUSED */ static int zfs_acl_node_walk_init(mdb_walk_state_t *wsp) { if (wsp->walk_addr == NULL) { mdb_warn("must supply address of zfs_acl_node_t\n"); return (WALK_ERR); } wsp->walk_addr += mdb_ctf_offsetof_by_name(ZFS_STRUCT "zfs_acl", "z_acl"); if (mdb_layered_walk("list", wsp) == -1) { mdb_warn("failed to walk 'list'\n"); return (WALK_ERR); } return (WALK_NEXT); } static int zfs_acl_node_walk_step(mdb_walk_state_t *wsp) { zfs_acl_node_t aclnode; if (mdb_vread(&aclnode, sizeof (zfs_acl_node_t), wsp->walk_addr) == -1) { mdb_warn("failed to read zfs_acl_node at %p", wsp->walk_addr); return (WALK_ERR); } return (wsp->walk_callback(wsp->walk_addr, &aclnode, wsp->walk_cbdata)); } typedef struct ace_walk_data { int ace_count; int ace_version; } ace_walk_data_t; static int zfs_aces_walk_init_common(mdb_walk_state_t *wsp, int version, int ace_count, uintptr_t ace_data) { ace_walk_data_t *ace_walk_data; if (wsp->walk_addr == NULL) { mdb_warn("must supply address of zfs_acl_node_t\n"); return (WALK_ERR); } ace_walk_data = mdb_alloc(sizeof (ace_walk_data_t), UM_SLEEP | UM_GC); ace_walk_data->ace_count = ace_count; ace_walk_data->ace_version = version; wsp->walk_addr = ace_data; wsp->walk_data = ace_walk_data; return (WALK_NEXT); } static int zfs_acl_node_aces_walk_init_common(mdb_walk_state_t *wsp, int version) { static int gotid; static mdb_ctf_id_t acl_id; int z_ace_count; uintptr_t z_acldata; if (!gotid) { if (mdb_ctf_lookup_by_name("struct zfs_acl_node", &acl_id) == -1) { mdb_warn("couldn't find struct zfs_acl_node"); return (DCMD_ERR); } gotid = TRUE; } if (GETMEMBID(wsp->walk_addr, &acl_id, z_ace_count, z_ace_count)) { return (DCMD_ERR); } if (GETMEMBID(wsp->walk_addr, &acl_id, z_acldata, z_acldata)) { return (DCMD_ERR); } return (zfs_aces_walk_init_common(wsp, version, z_ace_count, z_acldata)); } /* ARGSUSED */ static int zfs_acl_node_aces_walk_init(mdb_walk_state_t *wsp) { return (zfs_acl_node_aces_walk_init_common(wsp, 1)); } /* ARGSUSED */ static int zfs_acl_node_aces0_walk_init(mdb_walk_state_t *wsp) { return (zfs_acl_node_aces_walk_init_common(wsp, 0)); } static int zfs_aces_walk_step(mdb_walk_state_t *wsp) { ace_walk_data_t *ace_data = wsp->walk_data; zfs_ace_t zace; ace_t *acep; int status; int entry_type; int allow_type; uintptr_t ptr; if (ace_data->ace_count == 0) return (WALK_DONE); if (mdb_vread(&zace, sizeof (zfs_ace_t), wsp->walk_addr) == -1) { mdb_warn("failed to read zfs_ace_t at %#lx", wsp->walk_addr); return (WALK_ERR); } switch (ace_data->ace_version) { case 0: acep = (ace_t *)&zace; entry_type = acep->a_flags & ACE_TYPE_FLAGS; allow_type = acep->a_type; break; case 1: entry_type = zace.z_hdr.z_flags & ACE_TYPE_FLAGS; allow_type = zace.z_hdr.z_type; break; default: return (WALK_ERR); } ptr = (uintptr_t)wsp->walk_addr; switch (entry_type) { case ACE_OWNER: case ACE_EVERYONE: case (ACE_IDENTIFIER_GROUP | ACE_GROUP): ptr += ace_data->ace_version == 0 ? sizeof (ace_t) : sizeof (zfs_ace_hdr_t); break; case ACE_IDENTIFIER_GROUP: default: switch (allow_type) { case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE: case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE: case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE: case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE: ptr += ace_data->ace_version == 0 ? sizeof (ace_t) : sizeof (zfs_object_ace_t); break; default: ptr += ace_data->ace_version == 0 ? sizeof (ace_t) : sizeof (zfs_ace_t); break; } } ace_data->ace_count--; status = wsp->walk_callback(wsp->walk_addr, (void *)(uintptr_t)&zace, wsp->walk_cbdata); wsp->walk_addr = ptr; return (status); } typedef struct mdb_zfs_rrwlock { uintptr_t rr_writer; boolean_t rr_writer_wanted; } mdb_zfs_rrwlock_t; static uint_t rrw_key; /* ARGSUSED */ static int rrwlock(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) { mdb_zfs_rrwlock_t rrw; if (rrw_key == 0) { if (mdb_ctf_readsym(&rrw_key, "uint_t", "rrw_tsd_key", 0) == -1) return (DCMD_ERR); } if (mdb_ctf_vread(&rrw, "rrwlock_t", "mdb_zfs_rrwlock_t", addr, 0) == -1) return (DCMD_ERR); if (rrw.rr_writer != 0) { mdb_printf("write lock held by thread %lx\n", rrw.rr_writer); return (DCMD_OK); } if (rrw.rr_writer_wanted) { mdb_printf("writer wanted\n"); } mdb_printf("anonymous references:\n"); (void) mdb_call_dcmd("refcount", addr + mdb_ctf_offsetof_by_name(ZFS_STRUCT "rrwlock", "rr_anon_rcount"), DCMD_ADDRSPEC, 0, NULL); mdb_printf("linked references:\n"); (void) mdb_call_dcmd("refcount", addr + mdb_ctf_offsetof_by_name(ZFS_STRUCT "rrwlock", "rr_linked_rcount"), DCMD_ADDRSPEC, 0, NULL); /* * XXX This should find references from * "::walk thread | ::tsd -v ", but there is no support * for programmatic consumption of dcmds, so this would be * difficult, potentially requiring reimplementing ::tsd (both * user and kernel versions) in this MDB module. */ return (DCMD_OK); } /* * MDB module linkage information: * * We declare a list of structures describing our dcmds, and a function * named _mdb_init to return a pointer to our module information. */ static const mdb_dcmd_t dcmds[] = { { "arc", "[-bkmg]", "print ARC variables", arc_print }, { "blkptr", ":", "print blkptr_t", blkptr }, { "dbuf", ":", "print dmu_buf_impl_t", dbuf }, { "dbuf_stats", ":", "dbuf stats", dbuf_stats }, { "dbufs", "\t[-O objset_t*] [-n objset_name | \"mos\"] " "[-o object | \"mdn\"] \n" "\t[-l level] [-b blkid | \"bonus\"]", "find dmu_buf_impl_t's that match specified criteria", dbufs }, { "abuf_find", "dva_word[0] dva_word[1]", "find arc_buf_hdr_t of a specified DVA", abuf_find }, { "spa", "?[-cevmMh]\n" "\t-c display spa config\n" "\t-e display vdev statistics\n" "\t-v display vdev information\n" "\t-m display metaslab statistics\n" "\t-M display metaslab group statistics\n" "\t-h display histogram (requires -m or -M)\n", "spa_t summary", spa_print }, { "spa_config", ":", "print spa_t configuration", spa_print_config }, { "spa_space", ":[-b]", "print spa_t on-disk space usage", spa_space }, { "spa_vdevs", ":[-emMh]\n" "\t-e display vdev statistics\n" "\t-m dispaly metaslab statistics\n" "\t-M display metaslab group statistic\n" "\t-h display histogram (requires -m or -M)\n", "given a spa_t, print vdev summary", spa_vdevs }, { "vdev", ":[-re]\n" "\t-r display recursively\n" "\t-e display statistics\n" "\t-m display metaslab statistics\n" "\t-M display metaslab group statistics\n" "\t-h display histogram (requires -m or -M)\n", "vdev_t summary", vdev_print }, { "zio", ":[-cpr]\n" "\t-c display children\n" "\t-p display parents\n" "\t-r display recursively", "zio_t summary", zio_print }, { "zio_state", "?", "print out all zio_t structures on system or " "for a particular pool", zio_state }, { "zfs_blkstats", ":[-v]", "given a spa_t, print block type stats from last scrub", zfs_blkstats }, { "zfs_params", "", "print zfs tunable parameters", zfs_params }, { "refcount", ":[-r]\n" "\t-r display recently removed references", "print refcount_t holders", refcount }, { "zap_leaf", "", "print zap_leaf_phys_t", zap_leaf }, { "zfs_aces", ":[-v]", "print all ACEs from a zfs_acl_t", zfs_acl_dump }, { "zfs_ace", ":[-v]", "print zfs_ace", zfs_ace_print }, { "zfs_ace0", ":[-v]", "print zfs_ace0", zfs_ace0_print }, { "sa_attr_table", ":", "print SA attribute table from sa_os_t", sa_attr_table}, { "sa_attr", ": attr_id", "print SA attribute address when given sa_handle_t", sa_attr_print}, { "zfs_dbgmsg", ":[-va]", "print zfs debug log", dbgmsg}, { "rrwlock", ":", "print rrwlock_t, including readers", rrwlock}, { NULL } }; static const mdb_walker_t walkers[] = { { "zms_freelist", "walk ZFS metaslab freelist", freelist_walk_init, freelist_walk_step, NULL }, { "txg_list", "given any txg_list_t *, walk all entries in all txgs", txg_list_walk_init, txg_list_walk_step, NULL }, { "txg_list0", "given any txg_list_t *, walk all entries in txg 0", txg_list0_walk_init, txg_list_walk_step, NULL }, { "txg_list1", "given any txg_list_t *, walk all entries in txg 1", txg_list1_walk_init, txg_list_walk_step, NULL }, { "txg_list2", "given any txg_list_t *, walk all entries in txg 2", txg_list2_walk_init, txg_list_walk_step, NULL }, { "txg_list3", "given any txg_list_t *, walk all entries in txg 3", txg_list3_walk_init, txg_list_walk_step, NULL }, { "zio", "walk all zio structures, optionally for a particular spa_t", zio_walk_init, zio_walk_step, NULL }, { "zio_root", "walk all root zio_t structures, optionally for a particular spa_t", zio_walk_init, zio_walk_root_step, NULL }, { "spa", "walk all spa_t entries in the namespace", spa_walk_init, spa_walk_step, NULL }, { "metaslab", "given a spa_t *, walk all metaslab_t structures", metaslab_walk_init, metaslab_walk_step, NULL }, { "zfs_acl_node", "given a zfs_acl_t, walk all zfs_acl_nodes", zfs_acl_node_walk_init, zfs_acl_node_walk_step, NULL }, { "zfs_acl_node_aces", "given a zfs_acl_node_t, walk all ACEs", zfs_acl_node_aces_walk_init, zfs_aces_walk_step, NULL }, { "zfs_acl_node_aces0", "given a zfs_acl_node_t, walk all ACEs as ace_t", zfs_acl_node_aces0_walk_init, zfs_aces_walk_step, NULL }, { NULL } }; static const mdb_modinfo_t modinfo = { MDB_API_VERSION, dcmds, walkers }; const mdb_modinfo_t * _mdb_init(void) { return (&modinfo); }