diff options
Diffstat (limited to 'module/zfs/zil.c')
| -rw-r--r-- | module/zfs/zil.c | 56 |
1 files changed, 51 insertions, 5 deletions
diff --git a/module/zfs/zil.c b/module/zfs/zil.c index 220f2d79e..c9618c13e 100644 --- a/module/zfs/zil.c +++ b/module/zfs/zil.c @@ -20,7 +20,7 @@ */ /* * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. - * Copyright (c) 2011 by Delphix. All rights reserved. + * Copyright (c) 2012 by Delphix. All rights reserved. */ /* Portions Copyright 2010 Robert Milkowski */ @@ -480,6 +480,38 @@ zil_alloc_lwb(zilog_t *zilog, blkptr_t *bp, uint64_t txg, boolean_t fastwrite) } /* + * Called when we create in-memory log transactions so that we know + * to cleanup the itxs at the end of spa_sync(). + */ +void +zilog_dirty(zilog_t *zilog, uint64_t txg) +{ + dsl_pool_t *dp = zilog->zl_dmu_pool; + dsl_dataset_t *ds = dmu_objset_ds(zilog->zl_os); + + if (dsl_dataset_is_snapshot(ds)) + panic("dirtying snapshot!"); + + if (txg_list_add(&dp->dp_dirty_zilogs, zilog, txg) == 0) { + /* up the hold count until we can be written out */ + dmu_buf_add_ref(ds->ds_dbuf, zilog); + } +} + +boolean_t +zilog_is_dirty(zilog_t *zilog) +{ + dsl_pool_t *dp = zilog->zl_dmu_pool; + int t; + + for (t = 0; t < TXG_SIZE; t++) { + if (txg_list_member(&dp->dp_dirty_zilogs, zilog, t)) + return (B_TRUE); + } + return (B_FALSE); +} + +/* * Create an on-disk intent log. */ static lwb_t * @@ -601,14 +633,21 @@ zil_destroy(zilog_t *zilog, boolean_t keep_first) kmem_cache_free(zil_lwb_cache, lwb); } } else if (!keep_first) { - (void) zil_parse(zilog, zil_free_log_block, - zil_free_log_record, tx, zh->zh_claim_txg); + zil_destroy_sync(zilog, tx); } mutex_exit(&zilog->zl_lock); dmu_tx_commit(tx); } +void +zil_destroy_sync(zilog_t *zilog, dmu_tx_t *tx) +{ + ASSERT(list_is_empty(&zilog->zl_lwb_list)); + (void) zil_parse(zilog, zil_free_log_block, + zil_free_log_record, tx, zilog->zl_header->zh_claim_txg); +} + int zil_claim(const char *osname, void *txarg) { @@ -1042,6 +1081,8 @@ zil_lwb_commit(zilog_t *zilog, itx_t *itx, lwb_t *lwb) return (NULL); ASSERT(lwb->lwb_buf != NULL); + ASSERT(zilog_is_dirty(zilog) || + spa_freeze_txg(zilog->zl_spa) != UINT64_MAX); if (lrc->lrc_txtype == TX_WRITE && itx->itx_wr_state == WR_NEED_COPY) dlen = P2ROUNDUP_TYPED( @@ -1272,7 +1313,7 @@ zil_itx_assign(zilog_t *zilog, itx_t *itx, dmu_tx_t *tx) if ((itx->itx_lr.lrc_txtype & ~TX_CI) == TX_RENAME) zil_async_to_sync(zilog, itx->itx_oid); - if (spa_freeze_txg(zilog->zl_spa) != UINT64_MAX) + if (spa_freeze_txg(zilog->zl_spa) != UINT64_MAX) txg = ZILTEST_TXG; else txg = dmu_tx_get_txg(tx); @@ -1323,6 +1364,7 @@ zil_itx_assign(zilog_t *zilog, itx_t *itx, dmu_tx_t *tx) } itx->itx_lr.lrc_txg = dmu_tx_get_txg(tx); + zilog_dirty(zilog, txg); mutex_exit(&itxg->itxg_lock); /* Release the old itxs now we've dropped the lock */ @@ -1332,7 +1374,10 @@ zil_itx_assign(zilog_t *zilog, itx_t *itx, dmu_tx_t *tx) /* * If there are any in-memory intent log transactions which have now been - * synced then start up a taskq to free them. + * synced then start up a taskq to free them. We should only do this after we + * have written out the uberblocks (i.e. txg has been comitted) so that + * don't inadvertently clean out in-memory log records that would be required + * by zil_commit(). */ void zil_clean(zilog_t *zilog, uint64_t synced_txg) @@ -1837,6 +1882,7 @@ zil_close(zilog_t *zilog) mutex_exit(&zilog->zl_lock); if (txg) txg_wait_synced(zilog->zl_dmu_pool, txg); + ASSERT(!zilog_is_dirty(zilog)); taskq_destroy(zilog->zl_clean_taskq); zilog->zl_clean_taskq = NULL; |