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Illumos 5959 - clean up per-dataset feature count code

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5959 clean up per-dataset feature count code
Reviewed by: Toomas Soome <tsoome@me.com>
Reviewed by: George Wilson <george@delphix.com>
Reviewed by: Alex Reece <alex@delphix.com>
Approved by: Richard Lowe <richlowe@richlowe.net>

References:
  https://www.illumos.org/issues/5959
  https://github.com/illumos/illumos-gate/commit/ca0cc39

Porting notes:

illumos code doesn't check for feature_get_refcount() returning
ENOTSUP (which means feature is disabled) in zdb. zfsonlinux added
a check in https://github.com/zfsonlinux/zfs/commit/784652c
due to #3468. The check was reintroduced here.

Ported-by: Witaut Bajaryn <vitaut.bayaryn@gmail.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #3965
This commit is contained in:
Matthew Ahrens 2015-07-24 09:53:55 -07:00 committed by Brian Behlendorf
parent 072484504f
commit 241b541574
11 changed files with 237 additions and 178 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

46
cmd/zdb/zdb.c
View File

@ -21,7 +21,7 @@
/*
* Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2011, 2014 by Delphix. All rights reserved.
* Copyright (c) 2011, 2015 by Delphix. All rights reserved.
* Copyright (c) 2015, Intel Corporation.
*/
@ -2274,7 +2274,7 @@ dump_label(const char *dev)
(void) close(fd);
}
static uint64_t num_large_blocks;
static uint64_t dataset_feature_count[SPA_FEATURES];
/*ARGSUSED*/
static int
@ -2282,14 +2282,22 @@ dump_one_dir(const char *dsname, void *arg)
{
int error;
objset_t *os;
spa_feature_t f;
error = dmu_objset_own(dsname, DMU_OST_ANY, B_TRUE, FTAG, &os);
if (error) {
(void) printf("Could not open %s, error %d\n", dsname, error);
return (0);
}
if (dmu_objset_ds(os)->ds_large_blocks)
num_large_blocks++;
for (f = 0; f < SPA_FEATURES; f++) {
if (!dmu_objset_ds(os)->ds_feature_inuse[f])
continue;
ASSERT(spa_feature_table[f].fi_flags &
ZFEATURE_FLAG_PER_DATASET);
dataset_feature_count[f]++;
}
dump_dir(os);
dmu_objset_disown(os, FTAG);
fuid_table_destroy();
@ -3094,7 +3102,7 @@ dump_zpool(spa_t *spa)
dump_metaslab_groups(spa);
if (dump_opt['d'] || dump_opt['i']) {
uint64_t refcount;
spa_feature_t f;
dump_dir(dp->dp_meta_objset);
if (dump_opt['d'] >= 3) {
@ -3117,18 +3125,28 @@ dump_zpool(spa_t *spa)
(void) dmu_objset_find(spa_name(spa), dump_one_dir,
NULL, DS_FIND_SNAPSHOTS | DS_FIND_CHILDREN);
if (feature_get_refcount(spa,
&spa_feature_table[SPA_FEATURE_LARGE_BLOCKS],
&refcount) != ENOTSUP) {
if (num_large_blocks != refcount) {
(void) printf("large_blocks feature refcount "
"mismatch: expected %lld != actual %lld\n",
(longlong_t)num_large_blocks,
for (f = 0; f < SPA_FEATURES; f++) {
uint64_t refcount;
if (!(spa_feature_table[f].fi_flags &
ZFEATURE_FLAG_PER_DATASET)) {
ASSERT0(dataset_feature_count[f]);
continue;
}
if (feature_get_refcount(spa, &spa_feature_table[f],
&refcount) == ENOTSUP)
continue;
if (dataset_feature_count[f] != refcount) {
(void) printf("%s feature refcount mismatch: "
"%lld datasets != %lld refcount\n",
spa_feature_table[f].fi_uname,
(longlong_t)dataset_feature_count[f],
(longlong_t)refcount);
rc = 2;
} else {
(void) printf("Verified large_blocks feature "
"refcount is correct (%llu)\n",
(void) printf("Verified %s feature refcount "
"of %llu is correct\n",
spa_feature_table[f].fi_uname,
(longlong_t)refcount);
}
}

20
cmd/zhack/zhack.c
View File

@ -20,7 +20,7 @@
*/
/*
* Copyright (c) 2011, 2014 by Delphix. All rights reserved.
* Copyright (c) 2011, 2015 by Delphix. All rights reserved.
* Copyright (c) 2013 Steven Hartland. All rights reserved.
*/
@ -294,8 +294,8 @@ zhack_feature_enable_sync(void *arg, dmu_tx_t *tx)
feature_enable_sync(spa, feature, tx);
spa_history_log_internal(spa, "zhack enable feature", tx,
"name=%s can_readonly=%u",
feature->fi_guid, feature->fi_can_readonly);
"name=%s flags=%u",
feature->fi_guid, feature->fi_flags);
}
static void
@ -314,9 +314,7 @@ zhack_do_feature_enable(int argc, char **argv)
*/
desc = NULL;
feature.fi_uname = "zhack";
feature.fi_mos = B_FALSE;
feature.fi_can_readonly = B_FALSE;
feature.fi_activate_on_enable = B_FALSE;
feature.fi_flags = 0;
feature.fi_depends = nodeps;
feature.fi_feature = SPA_FEATURE_NONE;
@ -324,7 +322,7 @@ zhack_do_feature_enable(int argc, char **argv)
while ((c = getopt(argc, argv, "rmd:")) != -1) {
switch (c) {
case 'r':
feature.fi_can_readonly = B_TRUE;
feature.fi_flags |= ZFEATURE_FLAG_READONLY_COMPAT;
break;
case 'd':
desc = strdup(optarg);
@ -413,7 +411,7 @@ zhack_do_feature_ref(int argc, char **argv)
* disk later.
*/
feature.fi_uname = "zhack";
feature.fi_mos = B_FALSE;
feature.fi_flags = 0;
feature.fi_desc = NULL;
feature.fi_depends = nodeps;
feature.fi_feature = SPA_FEATURE_NONE;
@ -422,7 +420,7 @@ zhack_do_feature_ref(int argc, char **argv)
while ((c = getopt(argc, argv, "md")) != -1) {
switch (c) {
case 'm':
feature.fi_mos = B_TRUE;
feature.fi_flags |= ZFEATURE_FLAG_MOS;
break;
case 'd':
decr = B_TRUE;
@ -455,10 +453,10 @@ zhack_do_feature_ref(int argc, char **argv)
if (0 == zap_contains(mos, spa->spa_feat_for_read_obj,
feature.fi_guid)) {
feature.fi_can_readonly = B_FALSE;
feature.fi_flags &= ~ZFEATURE_FLAG_READONLY_COMPAT;
} else if (0 == zap_contains(mos, spa->spa_feat_for_write_obj,
feature.fi_guid)) {
feature.fi_can_readonly = B_TRUE;
feature.fi_flags |= ZFEATURE_FLAG_READONLY_COMPAT;
} else {
fatal(spa, FTAG, "feature is not enabled: %s", feature.fi_guid);
}

5
cmd/zpool/zpool_main.c
View File

@ -22,7 +22,7 @@
/*
* Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
* Copyright 2011 Nexenta Systems, Inc. All rights reserved.
* Copyright (c) 2011, 2014 by Delphix. All rights reserved.
* Copyright (c) 2011, 2015 by Delphix. All rights reserved.
* Copyright (c) 2012 by Frederik Wessels. All rights reserved.
* Copyright (c) 2012 by Cyril Plisko. All rights reserved.
* Copyright (c) 2013 by Prasad Joshi (sTec). All rights reserved.
@ -5105,7 +5105,8 @@ zpool_do_upgrade(int argc, char **argv)
"---------------\n");
for (i = 0; i < SPA_FEATURES; i++) {
zfeature_info_t *fi = &spa_feature_table[i];
const char *ro = fi->fi_can_readonly ?
const char *ro =
(fi->fi_flags & ZFEATURE_FLAG_READONLY_COMPAT) ?
" (read-only compatible)" : "";
(void) printf("%-37s%s\n", fi->fi_uname, ro);

22
include/sys/dsl_dataset.h
View File

@ -20,7 +20,7 @@
*/
/*
* Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2013 by Delphix. All rights reserved.
* Copyright (c) 2011, 2015 by Delphix. All rights reserved.
* Copyright (c) 2013, Joyent, Inc. All rights reserved.
* Copyright (c) 2013 Steven Hartland. All rights reserved.
* Copyright (c) 2014 Spectra Logic Corporation, All rights reserved.
@ -38,6 +38,7 @@
#include <sys/zfs_context.h>
#include <sys/dsl_deadlist.h>
#include <sys/refcount.h>
#include <zfeature_common.h>
#ifdef __cplusplus
extern "C" {
@ -145,8 +146,6 @@ typedef struct dsl_dataset {
/* only used in syncing context, only valid for non-snapshots: */
struct dsl_dataset *ds_prev;
uint64_t ds_bookmarks; /* DMU_OTN_ZAP_METADATA */
boolean_t ds_large_blocks;
boolean_t ds_need_large_blocks;
/* has internal locking: */
dsl_deadlist_t ds_deadlist;
@ -185,6 +184,18 @@ typedef struct dsl_dataset {
kmutex_t ds_sendstream_lock;
list_t ds_sendstreams;
/*
* For ZFEATURE_FLAG_PER_DATASET features, set if this dataset
* uses this feature.
*/
uint8_t ds_feature_inuse[SPA_FEATURES];
/*
* Set if we need to activate the feature on this dataset this txg
* (used only in syncing context).
*/
uint8_t ds_feature_activation_needed[SPA_FEATURES];
/* Protected by ds_lock; keep at end of struct for better locality */
char ds_snapname[MAXNAMELEN];
} dsl_dataset_t;
@ -264,8 +275,6 @@ int dsl_dataset_space_written(dsl_dataset_t *oldsnap, dsl_dataset_t *new,
int dsl_dataset_space_wouldfree(dsl_dataset_t *firstsnap, dsl_dataset_t *last,
uint64_t *usedp, uint64_t *compp, uint64_t *uncompp);
boolean_t dsl_dataset_is_dirty(dsl_dataset_t *ds);
int dsl_dataset_activate_large_blocks(const char *dsname);
void dsl_dataset_activate_large_blocks_sync_impl(uint64_t dsobj, dmu_tx_t *tx);
int dsl_dsobj_to_dsname(char *pname, uint64_t obj, char *buf);
@ -305,6 +314,9 @@ void dsl_dataset_set_refreservation_sync_impl(dsl_dataset_t *ds,
void dsl_dataset_zapify(dsl_dataset_t *ds, dmu_tx_t *tx);
int dsl_dataset_rollback(const char *fsname, void *owner, nvlist_t *result);
void dsl_dataset_deactivate_feature(uint64_t dsobj,
spa_feature_t f, dmu_tx_t *tx);
#ifdef ZFS_DEBUG
#define dprintf_ds(ds, fmt, ...) do { \
if (zfs_flags & ZFS_DEBUG_DPRINTF) { \

18
include/zfeature_common.h
View File

@ -20,7 +20,7 @@
*/
/*
* Copyright (c) 2013 by Delphix. All rights reserved.
* Copyright (c) 2011, 2015 by Delphix. All rights reserved.
* Copyright (c) 2013 by Saso Kiselkov. All rights reserved.
*/
@ -55,15 +55,23 @@ typedef enum spa_feature {
#define SPA_FEATURE_DISABLED (-1ULL)
typedef enum zfeature_flags {
/* Can open pool readonly even if this feature is not supported. */
ZFEATURE_FLAG_READONLY_COMPAT = (1 << 0),
/* Is this feature necessary to read the MOS? */
ZFEATURE_FLAG_MOS = (1 << 1),
/* Activate this feature at the same time it is enabled. */
ZFEATURE_FLAG_ACTIVATE_ON_ENABLE = (1 << 2),
/* Each dataset has a field set if it has ever used this feature. */
ZFEATURE_FLAG_PER_DATASET = (1 << 3)
} zfeature_flags_t;
typedef struct zfeature_info {
spa_feature_t fi_feature;
const char *fi_uname; /* User-facing feature name */
const char *fi_guid; /* On-disk feature identifier */
const char *fi_desc; /* Feature description */
boolean_t fi_can_readonly; /* Can open pool readonly w/o support? */
boolean_t fi_mos; /* Is the feature necessary to read the MOS? */
/* Activate this feature at the same time it is enabled */
boolean_t fi_activate_on_enable;
zfeature_flags_t fi_flags;
/* array of dependencies, terminated by SPA_FEATURE_NONE */
const spa_feature_t *fi_depends;
} zfeature_info_t;

5
module/zfs/dbuf.c
View File

@ -1615,6 +1615,11 @@ dmu_buf_write_embedded(dmu_buf_t *dbuf, void *data,
struct dirty_leaf *dl;
dmu_object_type_t type;
if (etype == BP_EMBEDDED_TYPE_DATA) {
ASSERT(spa_feature_is_active(dmu_objset_spa(db->db_objset),
SPA_FEATURE_EMBEDDED_DATA));
}
DB_DNODE_ENTER(db);
type = DB_DNODE(db)->dn_type;
DB_DNODE_EXIT(db);

11
module/zfs/dmu_send.c
View File

@ -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) 2011, 2015 by Delphix. All rights reserved.
* Copyright 2011 Nexenta Systems, Inc. All rights reserved.
* Copyright (c) 2014, Joyent, Inc. All rights reserved.
* Copyright (c) 2011, 2014 by Delphix. All rights reserved.
@ -611,7 +611,7 @@ dmu_send_impl(void *tag, dsl_pool_t *dp, dsl_dataset_t *ds,
}
#endif
if (large_block_ok && ds->ds_large_blocks)
if (large_block_ok && ds->ds_feature_inuse[SPA_FEATURE_LARGE_BLOCKS])
featureflags |= DMU_BACKUP_FEATURE_LARGE_BLOCKS;
if (embedok &&
spa_feature_is_active(dp->dp_spa, SPA_FEATURE_EMBEDDED_DATA)) {
@ -1226,13 +1226,6 @@ dmu_recv_begin_sync(void *arg, dmu_tx_t *tx)
}
VERIFY0(dsl_dataset_own_obj(dp, dsobj, dmu_recv_tag, &newds));
if ((DMU_GET_FEATUREFLAGS(drrb->drr_versioninfo) &
DMU_BACKUP_FEATURE_LARGE_BLOCKS) &&
!newds->ds_large_blocks) {
dsl_dataset_activate_large_blocks_sync_impl(dsobj, tx);
newds->ds_large_blocks = B_TRUE;
}
dmu_buf_will_dirty(newds->ds_dbuf, tx);
dsl_dataset_phys(newds)->ds_flags |= DS_FLAG_INCONSISTENT;

196
module/zfs/dsl_dataset.c
View File

@ -20,7 +20,7 @@
*/
/*
* Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2013 by Delphix. All rights reserved.
* Copyright (c) 2011, 2015 by Delphix. All rights reserved.
* Copyright (c) 2014, Joyent, Inc. All rights reserved.
* Copyright (c) 2014 RackTop Systems.
* Copyright (c) 2014 Spectra Logic Corporation, All rights reserved.
@ -126,8 +126,10 @@ 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;
if (BP_GET_LSIZE(bp) > SPA_OLD_MAXBLOCKSIZE) {
ds->ds_feature_activation_needed[SPA_FEATURE_LARGE_BLOCKS] =
B_TRUE;
}
mutex_exit(&ds->ds_lock);
dsl_dir_diduse_space(ds->ds_dir, DD_USED_HEAD, delta,
compressed, uncompressed, tx);
@ -432,19 +434,25 @@ dsl_dataset_hold_obj(dsl_pool_t *dp, uint64_t dsobj, void *tag,
offsetof(dmu_sendarg_t, dsa_link));
if (doi.doi_type == DMU_OTN_ZAP_METADATA) {
int zaperr = zap_contains(mos, dsobj,
DS_FIELD_LARGE_BLOCKS);
if (zaperr != ENOENT) {
VERIFY0(zaperr);
ds->ds_large_blocks = B_TRUE;
spa_feature_t f;
for (f = 0; f < SPA_FEATURES; f++) {
if (!(spa_feature_table[f].fi_flags &
ZFEATURE_FLAG_PER_DATASET))
continue;
err = zap_contains(mos, dsobj,
spa_feature_table[f].fi_guid);
if (err == 0) {
ds->ds_feature_inuse[f] = B_TRUE;
} else {
ASSERT3U(err, ==, ENOENT);
err = 0;
}
}
}
if (err == 0) {
err = dsl_dir_hold_obj(dp,
dsl_dataset_phys(ds)->ds_dir_obj, NULL, ds,
&ds->ds_dir);
}
dsl_dataset_phys(ds)->ds_dir_obj, NULL, ds, &ds->ds_dir);
if (err != 0) {
mutex_destroy(&ds->ds_lock);
mutex_destroy(&ds->ds_opening_lock);
@ -698,6 +706,34 @@ dsl_dataset_tryown(dsl_dataset_t *ds, void *tag)
return (gotit);
}
static void
dsl_dataset_activate_feature(uint64_t dsobj, spa_feature_t f, 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;
VERIFY(spa_feature_table[f].fi_flags & ZFEATURE_FLAG_PER_DATASET);
spa_feature_incr(spa, f, tx);
dmu_object_zapify(mos, dsobj, DMU_OT_DSL_DATASET, tx);
VERIFY0(zap_add(mos, dsobj, spa_feature_table[f].fi_guid,
sizeof (zero), 1, &zero, tx));
}
void
dsl_dataset_deactivate_feature(uint64_t dsobj, spa_feature_t f, dmu_tx_t *tx)
{
spa_t *spa = dmu_tx_pool(tx)->dp_spa;
objset_t *mos = dmu_tx_pool(tx)->dp_meta_objset;
VERIFY(spa_feature_table[f].fi_flags & ZFEATURE_FLAG_PER_DATASET);
VERIFY0(zap_remove(mos, dsobj, spa_feature_table[f].fi_guid, tx));
spa_feature_decr(spa, f, tx);
}
uint64_t
dsl_dataset_create_sync_dd(dsl_dir_t *dd, dsl_dataset_t *origin,
uint64_t flags, dmu_tx_t *tx)
@ -736,6 +772,7 @@ dsl_dataset_create_sync_dd(dsl_dir_t *dd, dsl_dataset_t *origin,
if (origin == NULL) {
dsphys->ds_deadlist_obj = dsl_deadlist_alloc(mos, tx);
} else {
spa_feature_t f;
dsl_dataset_t *ohds; /* head of the origin snapshot */
dsphys->ds_prev_snap_obj = origin->ds_object;
@ -756,8 +793,10 @@ 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);
for (f = 0; f < SPA_FEATURES; f++) {
if (origin->ds_feature_inuse[f])
dsl_dataset_activate_feature(dsobj, f, tx);
}
dmu_buf_will_dirty(origin->ds_dbuf, tx);
dsl_dataset_phys(origin)->ds_num_children++;
@ -1233,6 +1272,7 @@ dsl_dataset_snapshot_sync_impl(dsl_dataset_t *ds, const char *snapname,
dsl_dataset_phys_t *dsphys;
uint64_t dsobj, crtxg;
objset_t *mos = dp->dp_meta_objset;
spa_feature_t f;
ASSERTV(static zil_header_t zero_zil);
ASSERTV(objset_t *os);
@ -1282,8 +1322,10 @@ 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);
for (f = 0; f < SPA_FEATURES; f++) {
if (ds->ds_feature_inuse[f])
dsl_dataset_activate_feature(dsobj, f, tx);
}
ASSERT3U(ds->ds_prev != 0, ==,
dsl_dataset_phys(ds)->ds_prev_snap_obj != 0);
@ -1561,6 +1603,8 @@ dsl_dataset_snapshot_tmp(const char *fsname, const char *snapname,
void
dsl_dataset_sync(dsl_dataset_t *ds, zio_t *zio, dmu_tx_t *tx)
{
spa_feature_t f;
ASSERT(dmu_tx_is_syncing(tx));
ASSERT(ds->ds_objset != NULL);
ASSERT(dsl_dataset_phys(ds)->ds_next_snap_obj == 0);
@ -1574,9 +1618,13 @@ dsl_dataset_sync(dsl_dataset_t *ds, zio_t *zio, dmu_tx_t *tx)
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;
for (f = 0; f < SPA_FEATURES; f++) {
if (ds->ds_feature_activation_needed[f]) {
if (ds->ds_feature_inuse[f])
continue;
dsl_dataset_activate_feature(ds->ds_object, f, tx);
ds->ds_feature_inuse[f] = B_TRUE;
}
}
}
@ -2703,6 +2751,7 @@ void
dsl_dataset_clone_swap_sync_impl(dsl_dataset_t *clone,
dsl_dataset_t *origin_head, dmu_tx_t *tx)
{
spa_feature_t f;
dsl_pool_t *dp = dmu_tx_pool(tx);
int64_t unused_refres_delta;
@ -2711,6 +2760,43 @@ dsl_dataset_clone_swap_sync_impl(dsl_dataset_t *clone,
dsl_dataset_phys(clone)->ds_unique_bytes <= origin_head->ds_quota);
ASSERT3P(clone->ds_prev, ==, origin_head->ds_prev);
/*
* Swap per-dataset feature flags.
*/
for (f = 0; f < SPA_FEATURES; f++) {
boolean_t clone_inuse;
boolean_t origin_head_inuse;
if (!(spa_feature_table[f].fi_flags &
ZFEATURE_FLAG_PER_DATASET)) {
ASSERT(!clone->ds_feature_inuse[f]);
ASSERT(!origin_head->ds_feature_inuse[f]);
continue;
}
clone_inuse = clone->ds_feature_inuse[f];
origin_head_inuse = origin_head->ds_feature_inuse[f];
if (clone_inuse) {
dsl_dataset_deactivate_feature(clone->ds_object, f, tx);
clone->ds_feature_inuse[f] = B_FALSE;
}
if (origin_head_inuse) {
dsl_dataset_deactivate_feature(origin_head->ds_object,
f, tx);
origin_head->ds_feature_inuse[f] = B_FALSE;
}
if (clone_inuse) {
dsl_dataset_activate_feature(origin_head->ds_object,
f, tx);
origin_head->ds_feature_inuse[f] = B_TRUE;
}
if (origin_head_inuse) {
dsl_dataset_activate_feature(clone->ds_object, f, tx);
clone->ds_feature_inuse[f] = B_TRUE;
}
}
dmu_buf_will_dirty(clone->ds_dbuf, tx);
dmu_buf_will_dirty(origin_head->ds_dbuf, tx);
@ -3265,77 +3351,6 @@ 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
@ -3380,7 +3395,6 @@ dsl_dataset_is_before(dsl_dataset_t *later, dsl_dataset_t *earlier,
return (ret);
}
void
dsl_dataset_zapify(dsl_dataset_t *ds, dmu_tx_t *tx)
{

24
module/zfs/dsl_destroy.c
View File

@ -20,7 +20,7 @@
*/
/*
* Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2012, 2014 by Delphix. All rights reserved.
* Copyright (c) 2012, 2015 by Delphix. All rights reserved.
* Copyright (c) 2013 Steven Hartland. All rights reserved.
* Copyright (c) 2013 by Joyent, Inc. All rights reserved.
*/
@ -246,6 +246,7 @@ dsl_destroy_snapshot_sync_impl(dsl_dataset_t *ds, boolean_t defer, dmu_tx_t *tx)
#ifdef ZFS_DEBUG
int err;
#endif
spa_feature_t f;
int after_branch_point = FALSE;
dsl_pool_t *dp = ds->ds_dir->dd_pool;
objset_t *mos = dp->dp_meta_objset;
@ -277,9 +278,11 @@ dsl_destroy_snapshot_sync_impl(dsl_dataset_t *ds, boolean_t defer, dmu_tx_t *tx)
obj = ds->ds_object;
if (ds->ds_large_blocks) {
ASSERT0(zap_contains(mos, obj, DS_FIELD_LARGE_BLOCKS));
spa_feature_decr(dp->dp_spa, SPA_FEATURE_LARGE_BLOCKS, tx);
for (f = 0; f < SPA_FEATURES; f++) {
if (ds->ds_feature_inuse[f]) {
dsl_dataset_deactivate_feature(obj, f, tx);
ds->ds_feature_inuse[f] = B_FALSE;
}
}
if (dsl_dataset_phys(ds)->ds_prev_snap_obj != 0) {
ASSERT3P(ds->ds_prev, ==, NULL);
@ -715,6 +718,7 @@ void
dsl_destroy_head_sync_impl(dsl_dataset_t *ds, dmu_tx_t *tx)
{
dsl_pool_t *dp = dmu_tx_pool(tx);
spa_feature_t f;
objset_t *mos = dp->dp_meta_objset;
uint64_t obj, ddobj, prevobj = 0;
boolean_t rmorigin;
@ -742,13 +746,17 @@ dsl_destroy_head_sync_impl(dsl_dataset_t *ds, dmu_tx_t *tx)
ASSERT0(ds->ds_reserved);
}
if (ds->ds_large_blocks)
spa_feature_decr(dp->dp_spa, SPA_FEATURE_LARGE_BLOCKS, tx);
obj = ds->ds_object;
for (f = 0; f < SPA_FEATURES; f++) {
if (ds->ds_feature_inuse[f]) {
dsl_dataset_deactivate_feature(obj, f, tx);
ds->ds_feature_inuse[f] = B_FALSE;
}
}
dsl_scan_ds_destroyed(ds, tx);
obj = ds->ds_object;
if (dsl_dataset_phys(ds)->ds_prev_snap_obj != 0) {
/* This is a clone */
ASSERT(ds->ds_prev != NULL);

16
module/zfs/zfeature.c
View File

@ -20,7 +20,7 @@
*/
/*
* Copyright (c) 2013 by Delphix. All rights reserved.
* Copyright (c) 2011, 2015 by Delphix. All rights reserved.
*/
#include <sys/zfs_context.h>
@ -253,7 +253,7 @@ feature_get_refcount_from_disk(spa_t *spa, zfeature_info_t *feature,
{
int err;
uint64_t refcount;
uint64_t zapobj = feature->fi_can_readonly ?
uint64_t zapobj = (feature->fi_flags & ZFEATURE_FLAG_READONLY_COMPAT) ?
spa->spa_feat_for_write_obj : spa->spa_feat_for_read_obj;
/*
@ -306,7 +306,7 @@ feature_sync(spa_t *spa, zfeature_info_t *feature, uint64_t refcount,
uint64_t zapobj;
ASSERT(VALID_FEATURE_OR_NONE(feature->fi_feature));
zapobj = feature->fi_can_readonly ?
zapobj = (feature->fi_flags & ZFEATURE_FLAG_READONLY_COMPAT) ?
spa->spa_feat_for_write_obj : spa->spa_feat_for_read_obj;
VERIFY0(zap_update(spa->spa_meta_objset, zapobj, feature->fi_guid,
sizeof (uint64_t), 1, &refcount, tx));
@ -327,7 +327,7 @@ feature_sync(spa_t *spa, zfeature_info_t *feature, uint64_t refcount,
if (refcount == 0)
spa_deactivate_mos_feature(spa, feature->fi_guid);
else if (feature->fi_mos)
else if (feature->fi_flags & ZFEATURE_FLAG_MOS)
spa_activate_mos_feature(spa, feature->fi_guid, tx);
}
@ -338,8 +338,9 @@ feature_sync(spa_t *spa, zfeature_info_t *feature, uint64_t refcount,
void
feature_enable_sync(spa_t *spa, zfeature_info_t *feature, dmu_tx_t *tx)
{
uint64_t initial_refcount = feature->fi_activate_on_enable ? 1 : 0;
uint64_t zapobj = feature->fi_can_readonly ?
uint64_t initial_refcount =
(feature->fi_flags & ZFEATURE_FLAG_ACTIVATE_ON_ENABLE) ? 1 : 0;
uint64_t zapobj = (feature->fi_flags & ZFEATURE_FLAG_READONLY_COMPAT) ?
spa->spa_feat_for_write_obj : spa->spa_feat_for_read_obj;
int i;
@ -385,7 +386,8 @@ feature_do_action(spa_t *spa, spa_feature_t fid, feature_action_t action,
{
uint64_t refcount = 0;
zfeature_info_t *feature = &spa_feature_table[fid];
ASSERTV(uint64_t zapobj = feature->fi_can_readonly ?
ASSERTV(uint64_t zapobj =
(feature->fi_flags & ZFEATURE_FLAG_READONLY_COMPAT) ?
spa->spa_feat_for_write_obj : spa->spa_feat_for_read_obj);
ASSERT(VALID_FEATURE_FID(fid));

50
module/zfs/zfeature_common.c
View File

@ -20,7 +20,7 @@
*/
/*
* Copyright (c) 2013 by Delphix. All rights reserved.
* Copyright (c) 2011, 2015 by Delphix. All rights reserved.
* Copyright (c) 2013 by Saso Kiselkov. All rights reserved.
* Copyright (c) 2014, Nexenta Systems, Inc. All rights reserved.
*/
@ -135,15 +135,15 @@ zfeature_depends_on(spa_feature_t fid, spa_feature_t check) {
static void
zfeature_register(spa_feature_t fid, const char *guid, const char *name,
const char *desc, boolean_t readonly, boolean_t mos,
boolean_t activate_on_enable, const spa_feature_t *deps)
const char *desc, zfeature_flags_t flags, const spa_feature_t *deps)
{
zfeature_info_t *feature = &spa_feature_table[fid];
static spa_feature_t nodeps[] = { SPA_FEATURE_NONE };
ASSERT(name != NULL);
ASSERT(desc != NULL);
ASSERT(!readonly || !mos);
ASSERT((flags & ZFEATURE_FLAG_READONLY_COMPAT) == 0 ||
(flags & ZFEATURE_FLAG_MOS) == 0);
ASSERT3U(fid, <, SPA_FEATURES);
ASSERT(zfeature_is_valid_guid(guid));
@ -154,9 +154,7 @@ zfeature_register(spa_feature_t fid, const char *guid, const char *name,
feature->fi_guid = guid;
feature->fi_uname = name;
feature->fi_desc = desc;
feature->fi_can_readonly = readonly;
feature->fi_mos = mos;
feature->fi_activate_on_enable = activate_on_enable;
feature->fi_flags = flags;
feature->fi_depends = deps;
}
@ -165,28 +163,28 @@ zpool_feature_init(void)
{
zfeature_register(SPA_FEATURE_ASYNC_DESTROY,
"com.delphix:async_destroy", "async_destroy",
"Destroy filesystems asynchronously.", B_TRUE, B_FALSE,
B_FALSE, NULL);
"Destroy filesystems asynchronously.",
ZFEATURE_FLAG_READONLY_COMPAT, NULL);
zfeature_register(SPA_FEATURE_EMPTY_BPOBJ,
"com.delphix:empty_bpobj", "empty_bpobj",
"Snapshots use less space.", B_TRUE, B_FALSE,
B_FALSE, NULL);
"Snapshots use less space.",
ZFEATURE_FLAG_READONLY_COMPAT, NULL);
zfeature_register(SPA_FEATURE_LZ4_COMPRESS,
"org.illumos:lz4_compress", "lz4_compress",
"LZ4 compression algorithm support.", B_FALSE, B_FALSE,
B_TRUE, NULL);
"LZ4 compression algorithm support.",
ZFEATURE_FLAG_ACTIVATE_ON_ENABLE, NULL);
zfeature_register(SPA_FEATURE_SPACEMAP_HISTOGRAM,
"com.delphix:spacemap_histogram", "spacemap_histogram",
"Spacemaps maintain space histograms.", B_TRUE, B_FALSE,
B_FALSE, NULL);
"Spacemaps maintain space histograms.",
ZFEATURE_FLAG_READONLY_COMPAT, NULL);
zfeature_register(SPA_FEATURE_ENABLED_TXG,
"com.delphix:enabled_txg", "enabled_txg",
"Record txg at which a feature is enabled", B_TRUE, B_FALSE,
B_FALSE, NULL);
"Record txg at which a feature is enabled",
ZFEATURE_FLAG_READONLY_COMPAT, NULL);
{
static const spa_feature_t hole_birth_deps[] = {
@ -196,13 +194,14 @@ zpool_feature_init(void)
zfeature_register(SPA_FEATURE_HOLE_BIRTH,
"com.delphix:hole_birth", "hole_birth",
"Retain hole birth txg for more precise zfs send",
B_FALSE, B_TRUE, B_TRUE, hole_birth_deps);
ZFEATURE_FLAG_MOS | ZFEATURE_FLAG_ACTIVATE_ON_ENABLE,
hole_birth_deps);
}
zfeature_register(SPA_FEATURE_EXTENSIBLE_DATASET,
"com.delphix:extensible_dataset", "extensible_dataset",
"Enhanced dataset functionality, used by other features.",
B_FALSE, B_FALSE, B_FALSE, NULL);
0, NULL);
{
static const spa_feature_t bookmarks_deps[] = {
@ -213,7 +212,7 @@ zpool_feature_init(void)
zfeature_register(SPA_FEATURE_BOOKMARKS,
"com.delphix:bookmarks", "bookmarks",
"\"zfs bookmark\" command",
B_TRUE, B_FALSE, B_FALSE, bookmarks_deps);
ZFEATURE_FLAG_READONLY_COMPAT, bookmarks_deps);
}
{
@ -223,14 +222,15 @@ zpool_feature_init(void)
};
zfeature_register(SPA_FEATURE_FS_SS_LIMIT,
"com.joyent:filesystem_limits", "filesystem_limits",
"Filesystem and snapshot limits.", B_TRUE, B_FALSE, B_FALSE,
filesystem_limits_deps);
"Filesystem and snapshot limits.",
ZFEATURE_FLAG_READONLY_COMPAT, filesystem_limits_deps);
}
zfeature_register(SPA_FEATURE_EMBEDDED_DATA,
"com.delphix:embedded_data", "embedded_data",
"Blocks which compress very well use even less space.",
B_FALSE, B_TRUE, B_TRUE, NULL);
ZFEATURE_FLAG_MOS | ZFEATURE_FLAG_ACTIVATE_ON_ENABLE,
NULL);
{
static const spa_feature_t large_blocks_deps[] = {
@ -239,7 +239,7 @@ zpool_feature_init(void)
};
zfeature_register(SPA_FEATURE_LARGE_BLOCKS,
"org.open-zfs:large_blocks", "large_blocks",
"Support for blocks larger than 128KB.", B_FALSE, B_FALSE, B_FALSE,
large_blocks_deps);
"Support for blocks larger than 128KB.",
ZFEATURE_FLAG_PER_DATASET, large_blocks_deps);
}
}