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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
Download Patch File Download Diff File Expand all files Collapse all files
module/zfs/zfeature.c
+9 -7
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));