diff options
Diffstat (limited to 'module/zfs/dsl_dataset.c')
| -rw-r--r-- | module/zfs/dsl_dataset.c | 114 |
1 files changed, 112 insertions, 2 deletions
diff --git a/module/zfs/dsl_dataset.c b/module/zfs/dsl_dataset.c index b444fca64..9a66c6552 100644 --- a/module/zfs/dsl_dataset.c +++ b/module/zfs/dsl_dataset.c @@ -51,6 +51,17 @@ #include <sys/dsl_userhold.h> #include <sys/dsl_bookmark.h> +/* + * The SPA supports block sizes up to 16MB. However, very large blocks + * can have an impact on i/o latency (e.g. tying up a spinning disk for + * ~300ms), and also potentially on the memory allocator. Therefore, + * we do not allow the recordsize to be set larger than zfs_max_recordsize + * (default 1MB). Larger blocks can be created by changing this tunable, + * and pools with larger blocks can always be imported and used, regardless + * of this setting. + */ +int zfs_max_recordsize = 1 * 1024 * 1024; + #define SWITCH64(x, y) \ { \ uint64_t __tmp = (x); \ @@ -60,8 +71,6 @@ #define DS_REF_MAX (1ULL << 62) -#define DSL_DEADLIST_BLOCKSIZE SPA_MAXBLOCKSIZE - extern inline dsl_dataset_phys_t *dsl_dataset_phys(dsl_dataset_t *ds); /* @@ -117,6 +126,8 @@ dsl_dataset_block_born(dsl_dataset_t *ds, const blkptr_t *bp, dmu_tx_t *tx) dsl_dataset_phys(ds)->ds_compressed_bytes += compressed; dsl_dataset_phys(ds)->ds_uncompressed_bytes += uncompressed; dsl_dataset_phys(ds)->ds_unique_bytes += used; + if (BP_GET_LSIZE(bp) > SPA_OLD_MAXBLOCKSIZE) + ds->ds_need_large_blocks = B_TRUE; mutex_exit(&ds->ds_lock); dsl_dir_diduse_space(ds->ds_dir, DD_USED_HEAD, delta, compressed, uncompressed, tx); @@ -414,6 +425,14 @@ dsl_dataset_hold_obj(dsl_pool_t *dp, uint64_t dsobj, void *tag, list_create(&ds->ds_sendstreams, sizeof (dmu_sendarg_t), offsetof(dmu_sendarg_t, dsa_link)); + if (doi.doi_type == DMU_OTN_ZAP_METADATA) { + err = zap_contains(mos, dsobj, DS_FIELD_LARGE_BLOCKS); + if (err == 0) + ds->ds_large_blocks = B_TRUE; + else + ASSERT3U(err, ==, ENOENT); + } + if (err == 0) { err = dsl_dir_hold_obj(dp, dsl_dataset_phys(ds)->ds_dir_obj, NULL, ds, @@ -730,6 +749,9 @@ dsl_dataset_create_sync_dd(dsl_dir_t *dd, dsl_dataset_t *origin, dsphys->ds_flags |= dsl_dataset_phys(origin)->ds_flags & (DS_FLAG_INCONSISTENT | DS_FLAG_CI_DATASET); + if (origin->ds_large_blocks) + dsl_dataset_activate_large_blocks_sync_impl(dsobj, tx); + dmu_buf_will_dirty(origin->ds_dbuf, tx); dsl_dataset_phys(origin)->ds_num_children++; @@ -1253,6 +1275,9 @@ dsl_dataset_snapshot_sync_impl(dsl_dataset_t *ds, const char *snapname, dsphys->ds_bp = dsl_dataset_phys(ds)->ds_bp; dmu_buf_rele(dbuf, FTAG); + if (ds->ds_large_blocks) + dsl_dataset_activate_large_blocks_sync_impl(dsobj, tx); + ASSERT3U(ds->ds_prev != 0, ==, dsl_dataset_phys(ds)->ds_prev_snap_obj != 0); if (ds->ds_prev) { @@ -1541,6 +1566,11 @@ dsl_dataset_sync(dsl_dataset_t *ds, zio_t *zio, dmu_tx_t *tx) dsl_dataset_phys(ds)->ds_fsid_guid = ds->ds_fsid_guid; dmu_objset_sync(ds->ds_objset, zio, tx); + + if (ds->ds_need_large_blocks && !ds->ds_large_blocks) { + dsl_dataset_activate_large_blocks_sync_impl(ds->ds_object, tx); + ds->ds_large_blocks = B_TRUE; + } } static void @@ -3222,6 +3252,77 @@ dsl_dataset_space_wouldfree(dsl_dataset_t *firstsnap, return (err); } +static int +dsl_dataset_activate_large_blocks_check(void *arg, dmu_tx_t *tx) +{ + const char *dsname = arg; + dsl_dataset_t *ds; + dsl_pool_t *dp = dmu_tx_pool(tx); + int error = 0; + + if (!spa_feature_is_enabled(dp->dp_spa, SPA_FEATURE_LARGE_BLOCKS)) + return (SET_ERROR(ENOTSUP)); + + ASSERT(spa_feature_is_enabled(dp->dp_spa, + SPA_FEATURE_EXTENSIBLE_DATASET)); + + error = dsl_dataset_hold(dp, dsname, FTAG, &ds); + if (error != 0) + return (error); + + if (ds->ds_large_blocks) + error = EALREADY; + dsl_dataset_rele(ds, FTAG); + + return (error); +} + +void +dsl_dataset_activate_large_blocks_sync_impl(uint64_t dsobj, dmu_tx_t *tx) +{ + spa_t *spa = dmu_tx_pool(tx)->dp_spa; + objset_t *mos = dmu_tx_pool(tx)->dp_meta_objset; + uint64_t zero = 0; + + spa_feature_incr(spa, SPA_FEATURE_LARGE_BLOCKS, tx); + dmu_object_zapify(mos, dsobj, DMU_OT_DSL_DATASET, tx); + + VERIFY0(zap_add(mos, dsobj, DS_FIELD_LARGE_BLOCKS, + sizeof (zero), 1, &zero, tx)); +} + +static void +dsl_dataset_activate_large_blocks_sync(void *arg, dmu_tx_t *tx) +{ + const char *dsname = arg; + dsl_dataset_t *ds; + + VERIFY0(dsl_dataset_hold(dmu_tx_pool(tx), dsname, FTAG, &ds)); + + dsl_dataset_activate_large_blocks_sync_impl(ds->ds_object, tx); + ASSERT(!ds->ds_large_blocks); + ds->ds_large_blocks = B_TRUE; + dsl_dataset_rele(ds, FTAG); +} + +int +dsl_dataset_activate_large_blocks(const char *dsname) +{ + int error; + + error = dsl_sync_task(dsname, + dsl_dataset_activate_large_blocks_check, + dsl_dataset_activate_large_blocks_sync, (void *)dsname, + 1, ZFS_SPACE_CHECK_RESERVED); + + /* + * EALREADY indicates that this dataset already supports large blocks. + */ + if (error == EALREADY) + error = 0; + return (error); +} + /* * Return TRUE if 'earlier' is an earlier snapshot in 'later's timeline. * For example, they could both be snapshots of the same filesystem, and @@ -3275,6 +3376,15 @@ dsl_dataset_zapify(dsl_dataset_t *ds, dmu_tx_t *tx) } #if defined(_KERNEL) && defined(HAVE_SPL) +#if defined(_LP64) +module_param(zfs_max_recordsize, int, 0644); +MODULE_PARM_DESC(zfs_max_recordsize, "Max allowed record size"); +#else +/* Limited to 1M on 32-bit platforms due to lack of virtual address space */ +module_param(zfs_max_recordsize, int, 0444); +MODULE_PARM_DESC(zfs_max_recordsize, "Max allowed record size"); +#endif + EXPORT_SYMBOL(dsl_dataset_hold); EXPORT_SYMBOL(dsl_dataset_hold_obj); EXPORT_SYMBOL(dsl_dataset_own); |