spa_history.c revision 7bfdf011e081684f853a3242d0296695110d9d84
06eeb2ad640ce72d394ac521094bed7681044408ek/*
06eeb2ad640ce72d394ac521094bed7681044408ek * CDDL HEADER START
06eeb2ad640ce72d394ac521094bed7681044408ek *
06eeb2ad640ce72d394ac521094bed7681044408ek * The contents of this file are subject to the terms of the
06eeb2ad640ce72d394ac521094bed7681044408ek * Common Development and Distribution License (the "License").
06eeb2ad640ce72d394ac521094bed7681044408ek * You may not use this file except in compliance with the License.
06eeb2ad640ce72d394ac521094bed7681044408ek *
06eeb2ad640ce72d394ac521094bed7681044408ek * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
06eeb2ad640ce72d394ac521094bed7681044408ek * or http://www.opensolaris.org/os/licensing.
06eeb2ad640ce72d394ac521094bed7681044408ek * See the License for the specific language governing permissions
06eeb2ad640ce72d394ac521094bed7681044408ek * and limitations under the License.
06eeb2ad640ce72d394ac521094bed7681044408ek *
06eeb2ad640ce72d394ac521094bed7681044408ek * When distributing Covered Code, include this CDDL HEADER in each
06eeb2ad640ce72d394ac521094bed7681044408ek * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
06eeb2ad640ce72d394ac521094bed7681044408ek * If applicable, add the following below this CDDL HEADER, with the
06eeb2ad640ce72d394ac521094bed7681044408ek * fields enclosed by brackets "[]" replaced with your own identifying
06eeb2ad640ce72d394ac521094bed7681044408ek * information: Portions Copyright [yyyy] [name of copyright owner]
06eeb2ad640ce72d394ac521094bed7681044408ek *
06eeb2ad640ce72d394ac521094bed7681044408ek * CDDL HEADER END
06eeb2ad640ce72d394ac521094bed7681044408ek */
06eeb2ad640ce72d394ac521094bed7681044408ek
06eeb2ad640ce72d394ac521094bed7681044408ek/*
7bfdf011e081684f853a3242d0296695110d9d84Neil Perrin * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
06eeb2ad640ce72d394ac521094bed7681044408ek * Use is subject to license terms.
06eeb2ad640ce72d394ac521094bed7681044408ek */
06eeb2ad640ce72d394ac521094bed7681044408ek
ecd6cf800b63704be73fb264c3f5b6e0dafc068dmarks#include <sys/spa.h>
06eeb2ad640ce72d394ac521094bed7681044408ek#include <sys/spa_impl.h>
06eeb2ad640ce72d394ac521094bed7681044408ek#include <sys/zap.h>
06eeb2ad640ce72d394ac521094bed7681044408ek#include <sys/dsl_synctask.h>
ecd6cf800b63704be73fb264c3f5b6e0dafc068dmarks#include <sys/dmu_tx.h>
ecd6cf800b63704be73fb264c3f5b6e0dafc068dmarks#include <sys/dmu_objset.h>
ecd6cf800b63704be73fb264c3f5b6e0dafc068dmarks#include <sys/utsname.h>
ecd6cf800b63704be73fb264c3f5b6e0dafc068dmarks#include <sys/cmn_err.h>
ecd6cf800b63704be73fb264c3f5b6e0dafc068dmarks#include <sys/sunddi.h>
ecd6cf800b63704be73fb264c3f5b6e0dafc068dmarks#ifdef _KERNEL
ecd6cf800b63704be73fb264c3f5b6e0dafc068dmarks#include <sys/zone.h>
ecd6cf800b63704be73fb264c3f5b6e0dafc068dmarks#endif
06eeb2ad640ce72d394ac521094bed7681044408ek
06eeb2ad640ce72d394ac521094bed7681044408ek/*
06eeb2ad640ce72d394ac521094bed7681044408ek * Routines to manage the on-disk history log.
06eeb2ad640ce72d394ac521094bed7681044408ek *
06eeb2ad640ce72d394ac521094bed7681044408ek * The history log is stored as a dmu object containing
06eeb2ad640ce72d394ac521094bed7681044408ek * <packed record length, record nvlist> tuples.
06eeb2ad640ce72d394ac521094bed7681044408ek *
06eeb2ad640ce72d394ac521094bed7681044408ek * Where "record nvlist" is a nvlist containing uint64_ts and strings, and
06eeb2ad640ce72d394ac521094bed7681044408ek * "packed record length" is the packed length of the "record nvlist" stored
06eeb2ad640ce72d394ac521094bed7681044408ek * as a little endian uint64_t.
06eeb2ad640ce72d394ac521094bed7681044408ek *
06eeb2ad640ce72d394ac521094bed7681044408ek * The log is implemented as a ring buffer, though the original creation
06eeb2ad640ce72d394ac521094bed7681044408ek * of the pool ('zpool create') is never overwritten.
06eeb2ad640ce72d394ac521094bed7681044408ek *
06eeb2ad640ce72d394ac521094bed7681044408ek * The history log is tracked as object 'spa_t::spa_history'. The bonus buffer
06eeb2ad640ce72d394ac521094bed7681044408ek * of 'spa_history' stores the offsets for logging/retrieving history as
06eeb2ad640ce72d394ac521094bed7681044408ek * 'spa_history_phys_t'. 'sh_pool_create_len' is the ending offset in bytes of
06eeb2ad640ce72d394ac521094bed7681044408ek * where the 'zpool create' record is stored. This allows us to never
06eeb2ad640ce72d394ac521094bed7681044408ek * overwrite the original creation of the pool. 'sh_phys_max_off' is the
06eeb2ad640ce72d394ac521094bed7681044408ek * physical ending offset in bytes of the log. This tells you the length of
06eeb2ad640ce72d394ac521094bed7681044408ek * the buffer. 'sh_eof' is the logical EOF (in bytes). Whenever a record
06eeb2ad640ce72d394ac521094bed7681044408ek * is added, 'sh_eof' is incremented by the the size of the record.
06eeb2ad640ce72d394ac521094bed7681044408ek * 'sh_eof' is never decremented. 'sh_bof' is the logical BOF (in bytes).
06eeb2ad640ce72d394ac521094bed7681044408ek * This is where the consumer should start reading from after reading in
06eeb2ad640ce72d394ac521094bed7681044408ek * the 'zpool create' portion of the log.
06eeb2ad640ce72d394ac521094bed7681044408ek *
06eeb2ad640ce72d394ac521094bed7681044408ek * 'sh_records_lost' keeps track of how many records have been overwritten
06eeb2ad640ce72d394ac521094bed7681044408ek * and permanently lost.
06eeb2ad640ce72d394ac521094bed7681044408ek */
06eeb2ad640ce72d394ac521094bed7681044408ek
06eeb2ad640ce72d394ac521094bed7681044408ek/* convert a logical offset to physical */
06eeb2ad640ce72d394ac521094bed7681044408ekstatic uint64_t
06eeb2ad640ce72d394ac521094bed7681044408ekspa_history_log_to_phys(uint64_t log_off, spa_history_phys_t *shpp)
06eeb2ad640ce72d394ac521094bed7681044408ek{
06eeb2ad640ce72d394ac521094bed7681044408ek uint64_t phys_len;
06eeb2ad640ce72d394ac521094bed7681044408ek
06eeb2ad640ce72d394ac521094bed7681044408ek phys_len = shpp->sh_phys_max_off - shpp->sh_pool_create_len;
06eeb2ad640ce72d394ac521094bed7681044408ek return ((log_off - shpp->sh_pool_create_len) % phys_len
06eeb2ad640ce72d394ac521094bed7681044408ek + shpp->sh_pool_create_len);
06eeb2ad640ce72d394ac521094bed7681044408ek}
06eeb2ad640ce72d394ac521094bed7681044408ek
06eeb2ad640ce72d394ac521094bed7681044408ekvoid
06eeb2ad640ce72d394ac521094bed7681044408ekspa_history_create_obj(spa_t *spa, dmu_tx_t *tx)
06eeb2ad640ce72d394ac521094bed7681044408ek{
06eeb2ad640ce72d394ac521094bed7681044408ek dmu_buf_t *dbp;
06eeb2ad640ce72d394ac521094bed7681044408ek spa_history_phys_t *shpp;
06eeb2ad640ce72d394ac521094bed7681044408ek objset_t *mos = spa->spa_meta_objset;
06eeb2ad640ce72d394ac521094bed7681044408ek
06eeb2ad640ce72d394ac521094bed7681044408ek ASSERT(spa->spa_history == 0);
06eeb2ad640ce72d394ac521094bed7681044408ek spa->spa_history = dmu_object_alloc(mos, DMU_OT_SPA_HISTORY,
06eeb2ad640ce72d394ac521094bed7681044408ek SPA_MAXBLOCKSIZE, DMU_OT_SPA_HISTORY_OFFSETS,
06eeb2ad640ce72d394ac521094bed7681044408ek sizeof (spa_history_phys_t), tx);
06eeb2ad640ce72d394ac521094bed7681044408ek
06eeb2ad640ce72d394ac521094bed7681044408ek VERIFY(zap_add(mos, DMU_POOL_DIRECTORY_OBJECT,
06eeb2ad640ce72d394ac521094bed7681044408ek DMU_POOL_HISTORY, sizeof (uint64_t), 1,
06eeb2ad640ce72d394ac521094bed7681044408ek &spa->spa_history, tx) == 0);
06eeb2ad640ce72d394ac521094bed7681044408ek
06eeb2ad640ce72d394ac521094bed7681044408ek VERIFY(0 == dmu_bonus_hold(mos, spa->spa_history, FTAG, &dbp));
06eeb2ad640ce72d394ac521094bed7681044408ek ASSERT(dbp->db_size >= sizeof (spa_history_phys_t));
06eeb2ad640ce72d394ac521094bed7681044408ek
06eeb2ad640ce72d394ac521094bed7681044408ek shpp = dbp->db_data;
06eeb2ad640ce72d394ac521094bed7681044408ek dmu_buf_will_dirty(dbp, tx);
06eeb2ad640ce72d394ac521094bed7681044408ek
06eeb2ad640ce72d394ac521094bed7681044408ek /*
06eeb2ad640ce72d394ac521094bed7681044408ek * Figure out maximum size of history log. We set it at
06eeb2ad640ce72d394ac521094bed7681044408ek * 1% of pool size, with a max of 32MB and min of 128KB.
06eeb2ad640ce72d394ac521094bed7681044408ek */
06eeb2ad640ce72d394ac521094bed7681044408ek shpp->sh_phys_max_off = spa_get_dspace(spa) / 100;
06eeb2ad640ce72d394ac521094bed7681044408ek shpp->sh_phys_max_off = MIN(shpp->sh_phys_max_off, 32<<20);
06eeb2ad640ce72d394ac521094bed7681044408ek shpp->sh_phys_max_off = MAX(shpp->sh_phys_max_off, 128<<10);
06eeb2ad640ce72d394ac521094bed7681044408ek
06eeb2ad640ce72d394ac521094bed7681044408ek dmu_buf_rele(dbp, FTAG);
06eeb2ad640ce72d394ac521094bed7681044408ek}
06eeb2ad640ce72d394ac521094bed7681044408ek
06eeb2ad640ce72d394ac521094bed7681044408ek/*
06eeb2ad640ce72d394ac521094bed7681044408ek * Change 'sh_bof' to the beginning of the next record.
06eeb2ad640ce72d394ac521094bed7681044408ek */
06eeb2ad640ce72d394ac521094bed7681044408ekstatic int
06eeb2ad640ce72d394ac521094bed7681044408ekspa_history_advance_bof(spa_t *spa, spa_history_phys_t *shpp)
06eeb2ad640ce72d394ac521094bed7681044408ek{
06eeb2ad640ce72d394ac521094bed7681044408ek objset_t *mos = spa->spa_meta_objset;
06eeb2ad640ce72d394ac521094bed7681044408ek uint64_t firstread, reclen, phys_bof;
06eeb2ad640ce72d394ac521094bed7681044408ek char buf[sizeof (reclen)];
06eeb2ad640ce72d394ac521094bed7681044408ek int err;
06eeb2ad640ce72d394ac521094bed7681044408ek
06eeb2ad640ce72d394ac521094bed7681044408ek phys_bof = spa_history_log_to_phys(shpp->sh_bof, shpp);
06eeb2ad640ce72d394ac521094bed7681044408ek firstread = MIN(sizeof (reclen), shpp->sh_phys_max_off - phys_bof);
06eeb2ad640ce72d394ac521094bed7681044408ek
06eeb2ad640ce72d394ac521094bed7681044408ek if ((err = dmu_read(mos, spa->spa_history, phys_bof, firstread,
7bfdf011e081684f853a3242d0296695110d9d84Neil Perrin buf, DMU_READ_PREFETCH)) != 0)
06eeb2ad640ce72d394ac521094bed7681044408ek return (err);
06eeb2ad640ce72d394ac521094bed7681044408ek if (firstread != sizeof (reclen)) {
06eeb2ad640ce72d394ac521094bed7681044408ek if ((err = dmu_read(mos, spa->spa_history,
06eeb2ad640ce72d394ac521094bed7681044408ek shpp->sh_pool_create_len, sizeof (reclen) - firstread,
7bfdf011e081684f853a3242d0296695110d9d84Neil Perrin buf + firstread, DMU_READ_PREFETCH)) != 0)
06eeb2ad640ce72d394ac521094bed7681044408ek return (err);
06eeb2ad640ce72d394ac521094bed7681044408ek }
06eeb2ad640ce72d394ac521094bed7681044408ek
06eeb2ad640ce72d394ac521094bed7681044408ek reclen = LE_64(*((uint64_t *)buf));
06eeb2ad640ce72d394ac521094bed7681044408ek shpp->sh_bof += reclen + sizeof (reclen);
06eeb2ad640ce72d394ac521094bed7681044408ek shpp->sh_records_lost++;
06eeb2ad640ce72d394ac521094bed7681044408ek return (0);
06eeb2ad640ce72d394ac521094bed7681044408ek}
06eeb2ad640ce72d394ac521094bed7681044408ek
06eeb2ad640ce72d394ac521094bed7681044408ekstatic int
06eeb2ad640ce72d394ac521094bed7681044408ekspa_history_write(spa_t *spa, void *buf, uint64_t len, spa_history_phys_t *shpp,
06eeb2ad640ce72d394ac521094bed7681044408ek dmu_tx_t *tx)
06eeb2ad640ce72d394ac521094bed7681044408ek{
06eeb2ad640ce72d394ac521094bed7681044408ek uint64_t firstwrite, phys_eof;
06eeb2ad640ce72d394ac521094bed7681044408ek objset_t *mos = spa->spa_meta_objset;
06eeb2ad640ce72d394ac521094bed7681044408ek int err;
06eeb2ad640ce72d394ac521094bed7681044408ek
06eeb2ad640ce72d394ac521094bed7681044408ek ASSERT(MUTEX_HELD(&spa->spa_history_lock));
06eeb2ad640ce72d394ac521094bed7681044408ek
06eeb2ad640ce72d394ac521094bed7681044408ek /* see if we need to reset logical BOF */
06eeb2ad640ce72d394ac521094bed7681044408ek while (shpp->sh_phys_max_off - shpp->sh_pool_create_len -
06eeb2ad640ce72d394ac521094bed7681044408ek (shpp->sh_eof - shpp->sh_bof) <= len) {
ecd6cf800b63704be73fb264c3f5b6e0dafc068dmarks if ((err = spa_history_advance_bof(spa, shpp)) != 0) {
06eeb2ad640ce72d394ac521094bed7681044408ek return (err);
ecd6cf800b63704be73fb264c3f5b6e0dafc068dmarks }
06eeb2ad640ce72d394ac521094bed7681044408ek }
06eeb2ad640ce72d394ac521094bed7681044408ek
06eeb2ad640ce72d394ac521094bed7681044408ek phys_eof = spa_history_log_to_phys(shpp->sh_eof, shpp);
06eeb2ad640ce72d394ac521094bed7681044408ek firstwrite = MIN(len, shpp->sh_phys_max_off - phys_eof);
06eeb2ad640ce72d394ac521094bed7681044408ek shpp->sh_eof += len;
06eeb2ad640ce72d394ac521094bed7681044408ek dmu_write(mos, spa->spa_history, phys_eof, firstwrite, buf, tx);
06eeb2ad640ce72d394ac521094bed7681044408ek
06eeb2ad640ce72d394ac521094bed7681044408ek len -= firstwrite;
06eeb2ad640ce72d394ac521094bed7681044408ek if (len > 0) {
06eeb2ad640ce72d394ac521094bed7681044408ek /* write out the rest at the beginning of physical file */
06eeb2ad640ce72d394ac521094bed7681044408ek dmu_write(mos, spa->spa_history, shpp->sh_pool_create_len,
06eeb2ad640ce72d394ac521094bed7681044408ek len, (char *)buf + firstwrite, tx);
06eeb2ad640ce72d394ac521094bed7681044408ek }
06eeb2ad640ce72d394ac521094bed7681044408ek
06eeb2ad640ce72d394ac521094bed7681044408ek return (0);
06eeb2ad640ce72d394ac521094bed7681044408ek}
06eeb2ad640ce72d394ac521094bed7681044408ek
ecd6cf800b63704be73fb264c3f5b6e0dafc068dmarksstatic char *
ecd6cf800b63704be73fb264c3f5b6e0dafc068dmarksspa_history_zone()
ecd6cf800b63704be73fb264c3f5b6e0dafc068dmarks{
ecd6cf800b63704be73fb264c3f5b6e0dafc068dmarks#ifdef _KERNEL
ecd6cf800b63704be73fb264c3f5b6e0dafc068dmarks return (curproc->p_zone->zone_name);
ecd6cf800b63704be73fb264c3f5b6e0dafc068dmarks#else
ecd6cf800b63704be73fb264c3f5b6e0dafc068dmarks return ("global");
ecd6cf800b63704be73fb264c3f5b6e0dafc068dmarks#endif
ecd6cf800b63704be73fb264c3f5b6e0dafc068dmarks}
ecd6cf800b63704be73fb264c3f5b6e0dafc068dmarks
06eeb2ad640ce72d394ac521094bed7681044408ek/*
06eeb2ad640ce72d394ac521094bed7681044408ek * Write out a history event.
06eeb2ad640ce72d394ac521094bed7681044408ek */
e7437265dc2a4920c197ed4337665539d358b22cahrensstatic void
ecd6cf800b63704be73fb264c3f5b6e0dafc068dmarksspa_history_log_sync(void *arg1, void *arg2, cred_t *cr, dmu_tx_t *tx)
06eeb2ad640ce72d394ac521094bed7681044408ek{
06eeb2ad640ce72d394ac521094bed7681044408ek spa_t *spa = arg1;
06eeb2ad640ce72d394ac521094bed7681044408ek history_arg_t *hap = arg2;
06eeb2ad640ce72d394ac521094bed7681044408ek const char *history_str = hap->ha_history_str;
06eeb2ad640ce72d394ac521094bed7681044408ek objset_t *mos = spa->spa_meta_objset;
06eeb2ad640ce72d394ac521094bed7681044408ek dmu_buf_t *dbp;
06eeb2ad640ce72d394ac521094bed7681044408ek spa_history_phys_t *shpp;
06eeb2ad640ce72d394ac521094bed7681044408ek size_t reclen;
06eeb2ad640ce72d394ac521094bed7681044408ek uint64_t le_len;
06eeb2ad640ce72d394ac521094bed7681044408ek nvlist_t *nvrecord;
06eeb2ad640ce72d394ac521094bed7681044408ek char *record_packed = NULL;
06eeb2ad640ce72d394ac521094bed7681044408ek int ret;
06eeb2ad640ce72d394ac521094bed7681044408ek
06eeb2ad640ce72d394ac521094bed7681044408ek /*
06eeb2ad640ce72d394ac521094bed7681044408ek * If we have an older pool that doesn't have a command
06eeb2ad640ce72d394ac521094bed7681044408ek * history object, create it now.
06eeb2ad640ce72d394ac521094bed7681044408ek */
06eeb2ad640ce72d394ac521094bed7681044408ek mutex_enter(&spa->spa_history_lock);
06eeb2ad640ce72d394ac521094bed7681044408ek if (!spa->spa_history)
06eeb2ad640ce72d394ac521094bed7681044408ek spa_history_create_obj(spa, tx);
06eeb2ad640ce72d394ac521094bed7681044408ek mutex_exit(&spa->spa_history_lock);
06eeb2ad640ce72d394ac521094bed7681044408ek
06eeb2ad640ce72d394ac521094bed7681044408ek /*
06eeb2ad640ce72d394ac521094bed7681044408ek * Get the offset of where we need to write via the bonus buffer.
06eeb2ad640ce72d394ac521094bed7681044408ek * Update the offset when the write completes.
06eeb2ad640ce72d394ac521094bed7681044408ek */
06eeb2ad640ce72d394ac521094bed7681044408ek VERIFY(0 == dmu_bonus_hold(mos, spa->spa_history, FTAG, &dbp));
06eeb2ad640ce72d394ac521094bed7681044408ek shpp = dbp->db_data;
06eeb2ad640ce72d394ac521094bed7681044408ek
06eeb2ad640ce72d394ac521094bed7681044408ek dmu_buf_will_dirty(dbp, tx);
06eeb2ad640ce72d394ac521094bed7681044408ek
06eeb2ad640ce72d394ac521094bed7681044408ek#ifdef ZFS_DEBUG
06eeb2ad640ce72d394ac521094bed7681044408ek {
06eeb2ad640ce72d394ac521094bed7681044408ek dmu_object_info_t doi;
06eeb2ad640ce72d394ac521094bed7681044408ek dmu_object_info_from_db(dbp, &doi);
06eeb2ad640ce72d394ac521094bed7681044408ek ASSERT3U(doi.doi_bonus_type, ==, DMU_OT_SPA_HISTORY_OFFSETS);
06eeb2ad640ce72d394ac521094bed7681044408ek }
06eeb2ad640ce72d394ac521094bed7681044408ek#endif
06eeb2ad640ce72d394ac521094bed7681044408ek
06eeb2ad640ce72d394ac521094bed7681044408ek VERIFY(nvlist_alloc(&nvrecord, NV_UNIQUE_NAME, KM_SLEEP) == 0);
06eeb2ad640ce72d394ac521094bed7681044408ek VERIFY(nvlist_add_uint64(nvrecord, ZPOOL_HIST_TIME,
06eeb2ad640ce72d394ac521094bed7681044408ek gethrestime_sec()) == 0);
ecd6cf800b63704be73fb264c3f5b6e0dafc068dmarks VERIFY(nvlist_add_uint64(nvrecord, ZPOOL_HIST_WHO,
ecd6cf800b63704be73fb264c3f5b6e0dafc068dmarks (uint64_t)crgetuid(cr)) == 0);
ecd6cf800b63704be73fb264c3f5b6e0dafc068dmarks if (hap->ha_zone[0] != '\0')
ecd6cf800b63704be73fb264c3f5b6e0dafc068dmarks VERIFY(nvlist_add_string(nvrecord, ZPOOL_HIST_ZONE,
ecd6cf800b63704be73fb264c3f5b6e0dafc068dmarks hap->ha_zone) == 0);
ecd6cf800b63704be73fb264c3f5b6e0dafc068dmarks#ifdef _KERNEL
ecd6cf800b63704be73fb264c3f5b6e0dafc068dmarks VERIFY(nvlist_add_string(nvrecord, ZPOOL_HIST_HOST,
ecd6cf800b63704be73fb264c3f5b6e0dafc068dmarks utsname.nodename) == 0);
ecd6cf800b63704be73fb264c3f5b6e0dafc068dmarks#endif
ecd6cf800b63704be73fb264c3f5b6e0dafc068dmarks if (hap->ha_log_type == LOG_CMD_POOL_CREATE ||
ecd6cf800b63704be73fb264c3f5b6e0dafc068dmarks hap->ha_log_type == LOG_CMD_NORMAL) {
ecd6cf800b63704be73fb264c3f5b6e0dafc068dmarks VERIFY(nvlist_add_string(nvrecord, ZPOOL_HIST_CMD,
ecd6cf800b63704be73fb264c3f5b6e0dafc068dmarks history_str) == 0);
ecd6cf800b63704be73fb264c3f5b6e0dafc068dmarks } else {
ecd6cf800b63704be73fb264c3f5b6e0dafc068dmarks VERIFY(nvlist_add_uint64(nvrecord, ZPOOL_HIST_INT_EVENT,
ecd6cf800b63704be73fb264c3f5b6e0dafc068dmarks hap->ha_event) == 0);
ecd6cf800b63704be73fb264c3f5b6e0dafc068dmarks VERIFY(nvlist_add_uint64(nvrecord, ZPOOL_HIST_TXG,
ecd6cf800b63704be73fb264c3f5b6e0dafc068dmarks tx->tx_txg) == 0);
ecd6cf800b63704be73fb264c3f5b6e0dafc068dmarks VERIFY(nvlist_add_string(nvrecord, ZPOOL_HIST_INT_STR,
ecd6cf800b63704be73fb264c3f5b6e0dafc068dmarks history_str) == 0);
ecd6cf800b63704be73fb264c3f5b6e0dafc068dmarks }
ecd6cf800b63704be73fb264c3f5b6e0dafc068dmarks
da165920f9fa0e493db9dba43b0c3771051409dcmarks VERIFY(nvlist_size(nvrecord, &reclen, NV_ENCODE_XDR) == 0);
da165920f9fa0e493db9dba43b0c3771051409dcmarks record_packed = kmem_alloc(reclen, KM_SLEEP);
da165920f9fa0e493db9dba43b0c3771051409dcmarks
06eeb2ad640ce72d394ac521094bed7681044408ek VERIFY(nvlist_pack(nvrecord, &record_packed, &reclen,
06eeb2ad640ce72d394ac521094bed7681044408ek NV_ENCODE_XDR, KM_SLEEP) == 0);
06eeb2ad640ce72d394ac521094bed7681044408ek
06eeb2ad640ce72d394ac521094bed7681044408ek mutex_enter(&spa->spa_history_lock);
ecd6cf800b63704be73fb264c3f5b6e0dafc068dmarks if (hap->ha_log_type == LOG_CMD_POOL_CREATE)
06eeb2ad640ce72d394ac521094bed7681044408ek VERIFY(shpp->sh_eof == shpp->sh_pool_create_len);
06eeb2ad640ce72d394ac521094bed7681044408ek
06eeb2ad640ce72d394ac521094bed7681044408ek /* write out the packed length as little endian */
55434c770c89aa1b84474f2559a106803511aba0ek le_len = LE_64((uint64_t)reclen);
06eeb2ad640ce72d394ac521094bed7681044408ek ret = spa_history_write(spa, &le_len, sizeof (le_len), shpp, tx);
06eeb2ad640ce72d394ac521094bed7681044408ek if (!ret)
06eeb2ad640ce72d394ac521094bed7681044408ek ret = spa_history_write(spa, record_packed, reclen, shpp, tx);
06eeb2ad640ce72d394ac521094bed7681044408ek
ecd6cf800b63704be73fb264c3f5b6e0dafc068dmarks if (!ret && hap->ha_log_type == LOG_CMD_POOL_CREATE) {
06eeb2ad640ce72d394ac521094bed7681044408ek shpp->sh_pool_create_len += sizeof (le_len) + reclen;
06eeb2ad640ce72d394ac521094bed7681044408ek shpp->sh_bof = shpp->sh_pool_create_len;
06eeb2ad640ce72d394ac521094bed7681044408ek }
06eeb2ad640ce72d394ac521094bed7681044408ek
06eeb2ad640ce72d394ac521094bed7681044408ek mutex_exit(&spa->spa_history_lock);
06eeb2ad640ce72d394ac521094bed7681044408ek nvlist_free(nvrecord);
06eeb2ad640ce72d394ac521094bed7681044408ek kmem_free(record_packed, reclen);
06eeb2ad640ce72d394ac521094bed7681044408ek dmu_buf_rele(dbp, FTAG);
e7437265dc2a4920c197ed4337665539d358b22cahrens
e7437265dc2a4920c197ed4337665539d358b22cahrens if (hap->ha_log_type == LOG_INTERNAL) {
e7437265dc2a4920c197ed4337665539d358b22cahrens kmem_free((void*)hap->ha_history_str, HIS_MAX_RECORD_LEN);
e7437265dc2a4920c197ed4337665539d358b22cahrens kmem_free(hap, sizeof (history_arg_t));
e7437265dc2a4920c197ed4337665539d358b22cahrens }
06eeb2ad640ce72d394ac521094bed7681044408ek}
06eeb2ad640ce72d394ac521094bed7681044408ek
06eeb2ad640ce72d394ac521094bed7681044408ek/*
06eeb2ad640ce72d394ac521094bed7681044408ek * Write out a history event.
06eeb2ad640ce72d394ac521094bed7681044408ek */
06eeb2ad640ce72d394ac521094bed7681044408ekint
ecd6cf800b63704be73fb264c3f5b6e0dafc068dmarksspa_history_log(spa_t *spa, const char *history_str, history_log_type_t what)
06eeb2ad640ce72d394ac521094bed7681044408ek{
06eeb2ad640ce72d394ac521094bed7681044408ek history_arg_t ha;
06eeb2ad640ce72d394ac521094bed7681044408ek
e7437265dc2a4920c197ed4337665539d358b22cahrens ASSERT(what != LOG_INTERNAL);
e7437265dc2a4920c197ed4337665539d358b22cahrens
06eeb2ad640ce72d394ac521094bed7681044408ek ha.ha_history_str = history_str;
ecd6cf800b63704be73fb264c3f5b6e0dafc068dmarks ha.ha_log_type = what;
ecd6cf800b63704be73fb264c3f5b6e0dafc068dmarks (void) strlcpy(ha.ha_zone, spa_history_zone(), sizeof (ha.ha_zone));
06eeb2ad640ce72d394ac521094bed7681044408ek return (dsl_sync_task_do(spa_get_dsl(spa), NULL, spa_history_log_sync,
06eeb2ad640ce72d394ac521094bed7681044408ek spa, &ha, 0));
06eeb2ad640ce72d394ac521094bed7681044408ek}
06eeb2ad640ce72d394ac521094bed7681044408ek
06eeb2ad640ce72d394ac521094bed7681044408ek/*
06eeb2ad640ce72d394ac521094bed7681044408ek * Read out the command history.
06eeb2ad640ce72d394ac521094bed7681044408ek */
06eeb2ad640ce72d394ac521094bed7681044408ekint
06eeb2ad640ce72d394ac521094bed7681044408ekspa_history_get(spa_t *spa, uint64_t *offp, uint64_t *len, char *buf)
06eeb2ad640ce72d394ac521094bed7681044408ek{
06eeb2ad640ce72d394ac521094bed7681044408ek objset_t *mos = spa->spa_meta_objset;
06eeb2ad640ce72d394ac521094bed7681044408ek dmu_buf_t *dbp;
06eeb2ad640ce72d394ac521094bed7681044408ek uint64_t read_len, phys_read_off, phys_eof;
06eeb2ad640ce72d394ac521094bed7681044408ek uint64_t leftover = 0;
06eeb2ad640ce72d394ac521094bed7681044408ek spa_history_phys_t *shpp;
06eeb2ad640ce72d394ac521094bed7681044408ek int err;
06eeb2ad640ce72d394ac521094bed7681044408ek
06eeb2ad640ce72d394ac521094bed7681044408ek /*
06eeb2ad640ce72d394ac521094bed7681044408ek * If the command history doesn't exist (older pool),
06eeb2ad640ce72d394ac521094bed7681044408ek * that's ok, just return ENOENT.
06eeb2ad640ce72d394ac521094bed7681044408ek */
06eeb2ad640ce72d394ac521094bed7681044408ek if (!spa->spa_history)
06eeb2ad640ce72d394ac521094bed7681044408ek return (ENOENT);
06eeb2ad640ce72d394ac521094bed7681044408ek
06eeb2ad640ce72d394ac521094bed7681044408ek if ((err = dmu_bonus_hold(mos, spa->spa_history, FTAG, &dbp)) != 0)
06eeb2ad640ce72d394ac521094bed7681044408ek return (err);
06eeb2ad640ce72d394ac521094bed7681044408ek shpp = dbp->db_data;
06eeb2ad640ce72d394ac521094bed7681044408ek
06eeb2ad640ce72d394ac521094bed7681044408ek#ifdef ZFS_DEBUG
06eeb2ad640ce72d394ac521094bed7681044408ek {
06eeb2ad640ce72d394ac521094bed7681044408ek dmu_object_info_t doi;
06eeb2ad640ce72d394ac521094bed7681044408ek dmu_object_info_from_db(dbp, &doi);
06eeb2ad640ce72d394ac521094bed7681044408ek ASSERT3U(doi.doi_bonus_type, ==, DMU_OT_SPA_HISTORY_OFFSETS);
06eeb2ad640ce72d394ac521094bed7681044408ek }
06eeb2ad640ce72d394ac521094bed7681044408ek#endif
06eeb2ad640ce72d394ac521094bed7681044408ek
06eeb2ad640ce72d394ac521094bed7681044408ek mutex_enter(&spa->spa_history_lock);
06eeb2ad640ce72d394ac521094bed7681044408ek phys_eof = spa_history_log_to_phys(shpp->sh_eof, shpp);
06eeb2ad640ce72d394ac521094bed7681044408ek
06eeb2ad640ce72d394ac521094bed7681044408ek if (*offp < shpp->sh_pool_create_len) {
06eeb2ad640ce72d394ac521094bed7681044408ek /* read in just the zpool create history */
06eeb2ad640ce72d394ac521094bed7681044408ek phys_read_off = *offp;
06eeb2ad640ce72d394ac521094bed7681044408ek read_len = MIN(*len, shpp->sh_pool_create_len -
06eeb2ad640ce72d394ac521094bed7681044408ek phys_read_off);
06eeb2ad640ce72d394ac521094bed7681044408ek } else {
06eeb2ad640ce72d394ac521094bed7681044408ek /*
06eeb2ad640ce72d394ac521094bed7681044408ek * Need to reset passed in offset to BOF if the passed in
06eeb2ad640ce72d394ac521094bed7681044408ek * offset has since been overwritten.
06eeb2ad640ce72d394ac521094bed7681044408ek */
06eeb2ad640ce72d394ac521094bed7681044408ek *offp = MAX(*offp, shpp->sh_bof);
06eeb2ad640ce72d394ac521094bed7681044408ek phys_read_off = spa_history_log_to_phys(*offp, shpp);
06eeb2ad640ce72d394ac521094bed7681044408ek
06eeb2ad640ce72d394ac521094bed7681044408ek /*
06eeb2ad640ce72d394ac521094bed7681044408ek * Read up to the minimum of what the user passed down or
06eeb2ad640ce72d394ac521094bed7681044408ek * the EOF (physical or logical). If we hit physical EOF,
06eeb2ad640ce72d394ac521094bed7681044408ek * use 'leftover' to read from the physical BOF.
06eeb2ad640ce72d394ac521094bed7681044408ek */
06eeb2ad640ce72d394ac521094bed7681044408ek if (phys_read_off <= phys_eof) {
06eeb2ad640ce72d394ac521094bed7681044408ek read_len = MIN(*len, phys_eof - phys_read_off);
06eeb2ad640ce72d394ac521094bed7681044408ek } else {
06eeb2ad640ce72d394ac521094bed7681044408ek read_len = MIN(*len,
06eeb2ad640ce72d394ac521094bed7681044408ek shpp->sh_phys_max_off - phys_read_off);
06eeb2ad640ce72d394ac521094bed7681044408ek if (phys_read_off + *len > shpp->sh_phys_max_off) {
06eeb2ad640ce72d394ac521094bed7681044408ek leftover = MIN(*len - read_len,
06eeb2ad640ce72d394ac521094bed7681044408ek phys_eof - shpp->sh_pool_create_len);
06eeb2ad640ce72d394ac521094bed7681044408ek }
06eeb2ad640ce72d394ac521094bed7681044408ek }
06eeb2ad640ce72d394ac521094bed7681044408ek }
06eeb2ad640ce72d394ac521094bed7681044408ek
06eeb2ad640ce72d394ac521094bed7681044408ek /* offset for consumer to use next */
06eeb2ad640ce72d394ac521094bed7681044408ek *offp += read_len + leftover;
06eeb2ad640ce72d394ac521094bed7681044408ek
06eeb2ad640ce72d394ac521094bed7681044408ek /* tell the consumer how much you actually read */
06eeb2ad640ce72d394ac521094bed7681044408ek *len = read_len + leftover;
06eeb2ad640ce72d394ac521094bed7681044408ek
06eeb2ad640ce72d394ac521094bed7681044408ek if (read_len == 0) {
06eeb2ad640ce72d394ac521094bed7681044408ek mutex_exit(&spa->spa_history_lock);
06eeb2ad640ce72d394ac521094bed7681044408ek dmu_buf_rele(dbp, FTAG);
06eeb2ad640ce72d394ac521094bed7681044408ek return (0);
06eeb2ad640ce72d394ac521094bed7681044408ek }
06eeb2ad640ce72d394ac521094bed7681044408ek
7bfdf011e081684f853a3242d0296695110d9d84Neil Perrin err = dmu_read(mos, spa->spa_history, phys_read_off, read_len, buf,
7bfdf011e081684f853a3242d0296695110d9d84Neil Perrin DMU_READ_PREFETCH);
06eeb2ad640ce72d394ac521094bed7681044408ek if (leftover && err == 0) {
06eeb2ad640ce72d394ac521094bed7681044408ek err = dmu_read(mos, spa->spa_history, shpp->sh_pool_create_len,
7bfdf011e081684f853a3242d0296695110d9d84Neil Perrin leftover, buf + read_len, DMU_READ_PREFETCH);
06eeb2ad640ce72d394ac521094bed7681044408ek }
06eeb2ad640ce72d394ac521094bed7681044408ek mutex_exit(&spa->spa_history_lock);
06eeb2ad640ce72d394ac521094bed7681044408ek
06eeb2ad640ce72d394ac521094bed7681044408ek dmu_buf_rele(dbp, FTAG);
06eeb2ad640ce72d394ac521094bed7681044408ek return (err);
06eeb2ad640ce72d394ac521094bed7681044408ek}
ecd6cf800b63704be73fb264c3f5b6e0dafc068dmarks
ecd6cf800b63704be73fb264c3f5b6e0dafc068dmarksvoid
ecd6cf800b63704be73fb264c3f5b6e0dafc068dmarksspa_history_internal_log(history_internal_events_t event, spa_t *spa,
ecd6cf800b63704be73fb264c3f5b6e0dafc068dmarks dmu_tx_t *tx, cred_t *cr, const char *fmt, ...)
ecd6cf800b63704be73fb264c3f5b6e0dafc068dmarks{
e7437265dc2a4920c197ed4337665539d358b22cahrens history_arg_t *hap;
ecd6cf800b63704be73fb264c3f5b6e0dafc068dmarks char *str;
ecd6cf800b63704be73fb264c3f5b6e0dafc068dmarks va_list adx;
ecd6cf800b63704be73fb264c3f5b6e0dafc068dmarks
088f389458728c464569a5506b58070254fa4f7dahrens /*
088f389458728c464569a5506b58070254fa4f7dahrens * If this is part of creating a pool, not everything is
088f389458728c464569a5506b58070254fa4f7dahrens * initialized yet, so don't bother logging the internal events.
088f389458728c464569a5506b58070254fa4f7dahrens */
088f389458728c464569a5506b58070254fa4f7dahrens if (tx->tx_txg == TXG_INITIAL)
088f389458728c464569a5506b58070254fa4f7dahrens return;
088f389458728c464569a5506b58070254fa4f7dahrens
e7437265dc2a4920c197ed4337665539d358b22cahrens hap = kmem_alloc(sizeof (history_arg_t), KM_SLEEP);
ecd6cf800b63704be73fb264c3f5b6e0dafc068dmarks str = kmem_alloc(HIS_MAX_RECORD_LEN, KM_SLEEP);
ecd6cf800b63704be73fb264c3f5b6e0dafc068dmarks
ecd6cf800b63704be73fb264c3f5b6e0dafc068dmarks va_start(adx, fmt);
ecd6cf800b63704be73fb264c3f5b6e0dafc068dmarks (void) vsnprintf(str, HIS_MAX_RECORD_LEN, fmt, adx);
ecd6cf800b63704be73fb264c3f5b6e0dafc068dmarks va_end(adx);
ecd6cf800b63704be73fb264c3f5b6e0dafc068dmarks
e7437265dc2a4920c197ed4337665539d358b22cahrens hap->ha_log_type = LOG_INTERNAL;
e7437265dc2a4920c197ed4337665539d358b22cahrens hap->ha_history_str = str;
e7437265dc2a4920c197ed4337665539d358b22cahrens hap->ha_event = event;
e7437265dc2a4920c197ed4337665539d358b22cahrens hap->ha_zone[0] = '\0';
e7437265dc2a4920c197ed4337665539d358b22cahrens
e7437265dc2a4920c197ed4337665539d358b22cahrens if (dmu_tx_is_syncing(tx)) {
e7437265dc2a4920c197ed4337665539d358b22cahrens spa_history_log_sync(spa, hap, cr, tx);
e7437265dc2a4920c197ed4337665539d358b22cahrens } else {
e7437265dc2a4920c197ed4337665539d358b22cahrens dsl_sync_task_do_nowait(spa_get_dsl(spa), NULL,
e7437265dc2a4920c197ed4337665539d358b22cahrens spa_history_log_sync, spa, hap, 0, tx);
e7437265dc2a4920c197ed4337665539d358b22cahrens }
e7437265dc2a4920c197ed4337665539d358b22cahrens /* spa_history_log_sync() will free hap and str */
ecd6cf800b63704be73fb264c3f5b6e0dafc068dmarks}