diff options
Diffstat (limited to 'module/zfs/dmu_object.c')
| -rw-r--r-- | module/zfs/dmu_object.c | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/module/zfs/dmu_object.c b/module/zfs/dmu_object.c index b6b82a24b..375439ed7 100644 --- a/module/zfs/dmu_object.c +++ b/module/zfs/dmu_object.c @@ -27,6 +27,8 @@ #include <sys/dmu_objset.h> #include <sys/dmu_tx.h> #include <sys/dnode.h> +#include <sys/zap.h> +#include <sys/zfeature.h> uint64_t dmu_object_alloc(objset_t *os, dmu_object_type_t ot, int blocksize, @@ -196,10 +198,63 @@ dmu_object_next(objset_t *os, uint64_t *objectp, boolean_t hole, uint64_t txg) return (error); } +/* + * Turn this object from old_type into DMU_OTN_ZAP_METADATA, and bump the + * refcount on SPA_FEATURE_EXTENSIBLE_DATASET. + * + * Only for use from syncing context, on MOS objects. + */ +void +dmu_object_zapify(objset_t *mos, uint64_t object, dmu_object_type_t old_type, + dmu_tx_t *tx) +{ + dnode_t *dn; + + ASSERT(dmu_tx_is_syncing(tx)); + + VERIFY0(dnode_hold(mos, object, FTAG, &dn)); + if (dn->dn_type == DMU_OTN_ZAP_METADATA) { + dnode_rele(dn, FTAG); + return; + } + ASSERT3U(dn->dn_type, ==, old_type); + ASSERT0(dn->dn_maxblkid); + dn->dn_next_type[tx->tx_txg & TXG_MASK] = dn->dn_type = + DMU_OTN_ZAP_METADATA; + dnode_setdirty(dn, tx); + dnode_rele(dn, FTAG); + + mzap_create_impl(mos, object, 0, 0, tx); + + spa_feature_incr(dmu_objset_spa(mos), + SPA_FEATURE_EXTENSIBLE_DATASET, tx); +} + +void +dmu_object_free_zapified(objset_t *mos, uint64_t object, dmu_tx_t *tx) +{ + dnode_t *dn; + dmu_object_type_t t; + + ASSERT(dmu_tx_is_syncing(tx)); + + VERIFY0(dnode_hold(mos, object, FTAG, &dn)); + t = dn->dn_type; + dnode_rele(dn, FTAG); + + if (t == DMU_OTN_ZAP_METADATA) { + spa_feature_decr(dmu_objset_spa(mos), + SPA_FEATURE_EXTENSIBLE_DATASET, tx); + } + VERIFY0(dmu_object_free(mos, object, tx)); +} + #if defined(_KERNEL) && defined(HAVE_SPL) EXPORT_SYMBOL(dmu_object_alloc); EXPORT_SYMBOL(dmu_object_claim); EXPORT_SYMBOL(dmu_object_reclaim); EXPORT_SYMBOL(dmu_object_free); EXPORT_SYMBOL(dmu_object_next); +EXPORT_SYMBOL(dmu_object_zapify); +EXPORT_SYMBOL(dmu_object_free_zapified); #endif |