+++ /dev/null
-/*
- * CDDL HEADER START
- *
- * The contents of this file are subject to the terms of the
- * Common Development and Distribution License (the "License").
- * You may not use this file except in compliance with the License.
- *
- * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
- * or http://www.opensolaris.org/os/licensing.
- * See the License for the specific language governing permissions
- * and limitations under the License.
- *
- * When distributing Covered Code, include this CDDL HEADER in each
- * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
- * If applicable, add the following below this CDDL HEADER, with the
- * fields enclosed by brackets "[]" replaced with your own identifying
- * information: Portions Copyright [yyyy] [name of copyright owner]
- *
- * CDDL HEADER END
- */
-
-/*
- * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
- * Copyright (c) 2012, 2017 by Delphix. All rights reserved.
- * Copyright (c) 2014 Spectra Logic Corporation, All rights reserved.
- */
-
-#include <sys/zfs_context.h>
-#include <sys/dbuf.h>
-#include <sys/dnode.h>
-#include <sys/dmu.h>
-#include <sys/dmu_tx.h>
-#include <sys/dmu_objset.h>
-#include <sys/dsl_dataset.h>
-#include <sys/spa.h>
-#include <sys/range_tree.h>
-#include <sys/zfeature.h>
-
-static void
-dnode_increase_indirection(dnode_t *dn, dmu_tx_t *tx)
-{
- dmu_buf_impl_t *db;
- int txgoff = tx->tx_txg & TXG_MASK;
- int nblkptr = dn->dn_phys->dn_nblkptr;
- int old_toplvl = dn->dn_phys->dn_nlevels - 1;
- int new_level = dn->dn_next_nlevels[txgoff];
- int i;
-
- rw_enter(&dn->dn_struct_rwlock, RW_WRITER);
-
- /* this dnode can't be paged out because it's dirty */
- ASSERT(dn->dn_phys->dn_type != DMU_OT_NONE);
- ASSERT(RW_WRITE_HELD(&dn->dn_struct_rwlock));
- ASSERT(new_level > 1 && dn->dn_phys->dn_nlevels > 0);
-
- db = dbuf_hold_level(dn, dn->dn_phys->dn_nlevels, 0, FTAG);
- ASSERT(db != NULL);
-
- dn->dn_phys->dn_nlevels = new_level;
- dprintf("os=%p obj=%llu, increase to %d\n", dn->dn_objset,
- dn->dn_object, dn->dn_phys->dn_nlevels);
-
- /* transfer dnode's block pointers to new indirect block */
- (void) dbuf_read(db, NULL, DB_RF_MUST_SUCCEED|DB_RF_HAVESTRUCT);
- ASSERT(db->db.db_data);
- ASSERT(arc_released(db->db_buf));
- ASSERT3U(sizeof (blkptr_t) * nblkptr, <=, db->db.db_size);
- bcopy(dn->dn_phys->dn_blkptr, db->db.db_data,
- sizeof (blkptr_t) * nblkptr);
- arc_buf_freeze(db->db_buf);
-
- /* set dbuf's parent pointers to new indirect buf */
- for (i = 0; i < nblkptr; i++) {
- dmu_buf_impl_t *child =
- dbuf_find(dn->dn_objset, dn->dn_object, old_toplvl, i);
-
- if (child == NULL)
- continue;
-#ifdef DEBUG
- DB_DNODE_ENTER(child);
- ASSERT3P(DB_DNODE(child), ==, dn);
- DB_DNODE_EXIT(child);
-#endif /* DEBUG */
- if (child->db_parent && child->db_parent != dn->dn_dbuf) {
- ASSERT(child->db_parent->db_level == db->db_level);
- ASSERT(child->db_blkptr !=
- &dn->dn_phys->dn_blkptr[child->db_blkid]);
- mutex_exit(&child->db_mtx);
- continue;
- }
- ASSERT(child->db_parent == NULL ||
- child->db_parent == dn->dn_dbuf);
-
- child->db_parent = db;
- dbuf_add_ref(db, child);
- if (db->db.db_data)
- child->db_blkptr = (blkptr_t *)db->db.db_data + i;
- else
- child->db_blkptr = NULL;
- dprintf_dbuf_bp(child, child->db_blkptr,
- "changed db_blkptr to new indirect %s", "");
-
- mutex_exit(&child->db_mtx);
- }
-
- bzero(dn->dn_phys->dn_blkptr, sizeof (blkptr_t) * nblkptr);
-
- dbuf_rele(db, FTAG);
-
- rw_exit(&dn->dn_struct_rwlock);
-}
-
-static void
-free_blocks(dnode_t *dn, blkptr_t *bp, int num, dmu_tx_t *tx)
-{
- dsl_dataset_t *ds = dn->dn_objset->os_dsl_dataset;
- uint64_t bytesfreed = 0;
- int i;
-
- dprintf("ds=%p obj=%llx num=%d\n", ds, dn->dn_object, num);
-
- for (i = 0; i < num; i++, bp++) {
- uint64_t lsize, lvl;
- dmu_object_type_t type;
-
- if (BP_IS_HOLE(bp))
- continue;
-
- bytesfreed += dsl_dataset_block_kill(ds, bp, tx, B_FALSE);
- ASSERT3U(bytesfreed, <=, DN_USED_BYTES(dn->dn_phys));
-
- /*
- * Save some useful information on the holes being
- * punched, including logical size, type, and indirection
- * level. Retaining birth time enables detection of when
- * holes are punched for reducing the number of free
- * records transmitted during a zfs send.
- */
-
- lsize = BP_GET_LSIZE(bp);
- type = BP_GET_TYPE(bp);
- lvl = BP_GET_LEVEL(bp);
-
- bzero(bp, sizeof (blkptr_t));
-
- if (spa_feature_is_active(dn->dn_objset->os_spa,
- SPA_FEATURE_HOLE_BIRTH)) {
- BP_SET_LSIZE(bp, lsize);
- BP_SET_TYPE(bp, type);
- BP_SET_LEVEL(bp, lvl);
- BP_SET_BIRTH(bp, dmu_tx_get_txg(tx), 0);
- }
- }
- dnode_diduse_space(dn, -bytesfreed);
-}
-
-#ifdef ZFS_DEBUG
-static void
-free_verify(dmu_buf_impl_t *db, uint64_t start, uint64_t end, dmu_tx_t *tx)
-{
- int off, num;
- int i, err, epbs;
- uint64_t txg = tx->tx_txg;
- dnode_t *dn;
-
- DB_DNODE_ENTER(db);
- dn = DB_DNODE(db);
- epbs = dn->dn_phys->dn_indblkshift - SPA_BLKPTRSHIFT;
- off = start - (db->db_blkid * 1<<epbs);
- num = end - start + 1;
-
- ASSERT3U(off, >=, 0);
- ASSERT3U(num, >=, 0);
- ASSERT3U(db->db_level, >, 0);
- ASSERT3U(db->db.db_size, ==, 1 << dn->dn_phys->dn_indblkshift);
- ASSERT3U(off+num, <=, db->db.db_size >> SPA_BLKPTRSHIFT);
- ASSERT(db->db_blkptr != NULL);
-
- for (i = off; i < off+num; i++) {
- uint64_t *buf;
- dmu_buf_impl_t *child;
- dbuf_dirty_record_t *dr;
- int j;
-
- ASSERT(db->db_level == 1);
-
- rw_enter(&dn->dn_struct_rwlock, RW_READER);
- err = dbuf_hold_impl(dn, db->db_level-1,
- (db->db_blkid << epbs) + i, TRUE, FALSE, FTAG, &child);
- rw_exit(&dn->dn_struct_rwlock);
- if (err == ENOENT)
- continue;
- ASSERT(err == 0);
- ASSERT(child->db_level == 0);
- dr = child->db_last_dirty;
- while (dr && dr->dr_txg > txg)
- dr = dr->dr_next;
- ASSERT(dr == NULL || dr->dr_txg == txg);
-
- /* data_old better be zeroed */
- if (dr) {
- buf = dr->dt.dl.dr_data->b_data;
- for (j = 0; j < child->db.db_size >> 3; j++) {
- if (buf[j] != 0) {
- panic("freed data not zero: "
- "child=%p i=%d off=%d num=%d\n",
- (void *)child, i, off, num);
- }
- }
- }
-
- /*
- * db_data better be zeroed unless it's dirty in a
- * future txg.
- */
- mutex_enter(&child->db_mtx);
- buf = child->db.db_data;
- if (buf != NULL && child->db_state != DB_FILL &&
- child->db_last_dirty == NULL) {
- for (j = 0; j < child->db.db_size >> 3; j++) {
- if (buf[j] != 0) {
- panic("freed data not zero: "
- "child=%p i=%d off=%d num=%d\n",
- (void *)child, i, off, num);
- }
- }
- }
- mutex_exit(&child->db_mtx);
-
- dbuf_rele(child, FTAG);
- }
- DB_DNODE_EXIT(db);
-}
-#endif
-
-static void
-free_children(dmu_buf_impl_t *db, uint64_t blkid, uint64_t nblks,
- dmu_tx_t *tx)
-{
- dnode_t *dn;
- blkptr_t *bp;
- dmu_buf_impl_t *subdb;
- uint64_t start, end, dbstart, dbend;
- unsigned int epbs, shift, i;
- uint64_t id;
-
- /*
- * There is a small possibility that this block will not be cached:
- * 1 - if level > 1 and there are no children with level <= 1
- * 2 - if this block was evicted since we read it from
- * dmu_tx_hold_free().
- */
- if (db->db_state != DB_CACHED)
- (void) dbuf_read(db, NULL, DB_RF_MUST_SUCCEED);
-
- dbuf_release_bp(db);
- bp = db->db.db_data;
-
- DB_DNODE_ENTER(db);
- dn = DB_DNODE(db);
- epbs = dn->dn_phys->dn_indblkshift - SPA_BLKPTRSHIFT;
- ASSERT3U(epbs, <, 31);
- shift = (db->db_level - 1) * epbs;
- dbstart = db->db_blkid << epbs;
- start = blkid >> shift;
- if (dbstart < start) {
- bp += start - dbstart;
- } else {
- start = dbstart;
- }
- dbend = ((db->db_blkid + 1) << epbs) - 1;
- end = (blkid + nblks - 1) >> shift;
- if (dbend <= end)
- end = dbend;
-
- ASSERT3U(start, <=, end);
-
- if (db->db_level == 1) {
- FREE_VERIFY(db, start, end, tx);
- free_blocks(dn, bp, end-start+1, tx);
- } else {
- for (id = start; id <= end; id++, bp++) {
- if (BP_IS_HOLE(bp))
- continue;
- rw_enter(&dn->dn_struct_rwlock, RW_READER);
- VERIFY0(dbuf_hold_impl(dn, db->db_level - 1,
- id, TRUE, FALSE, FTAG, &subdb));
- rw_exit(&dn->dn_struct_rwlock);
- ASSERT3P(bp, ==, subdb->db_blkptr);
-
- free_children(subdb, blkid, nblks, tx);
- dbuf_rele(subdb, FTAG);
- }
- }
-
- /* If this whole block is free, free ourself too. */
- for (i = 0, bp = db->db.db_data; i < 1ULL << epbs; i++, bp++) {
- if (!BP_IS_HOLE(bp))
- break;
- }
- if (i == 1 << epbs) {
- /*
- * We only found holes. Grab the rwlock to prevent
- * anybody from reading the blocks we're about to
- * zero out.
- */
- rw_enter(&dn->dn_struct_rwlock, RW_WRITER);
- bzero(db->db.db_data, db->db.db_size);
- rw_exit(&dn->dn_struct_rwlock);
- free_blocks(dn, db->db_blkptr, 1, tx);
- } else {
- /*
- * Partial block free; must be marked dirty so that it
- * will be written out.
- */
- ASSERT(db->db_dirtycnt > 0);
- }
-
- DB_DNODE_EXIT(db);
- arc_buf_freeze(db->db_buf);
-}
-
-/*
- * Traverse the indicated range of the provided file
- * and "free" all the blocks contained there.
- */
-static void
-dnode_sync_free_range_impl(dnode_t *dn, uint64_t blkid, uint64_t nblks,
- dmu_tx_t *tx)
-{
- blkptr_t *bp = dn->dn_phys->dn_blkptr;
- int dnlevel = dn->dn_phys->dn_nlevels;
- boolean_t trunc = B_FALSE;
-
- if (blkid > dn->dn_phys->dn_maxblkid)
- return;
-
- ASSERT(dn->dn_phys->dn_maxblkid < UINT64_MAX);
- if (blkid + nblks > dn->dn_phys->dn_maxblkid) {
- nblks = dn->dn_phys->dn_maxblkid - blkid + 1;
- trunc = B_TRUE;
- }
-
- /* There are no indirect blocks in the object */
- if (dnlevel == 1) {
- if (blkid >= dn->dn_phys->dn_nblkptr) {
- /* this range was never made persistent */
- return;
- }
- ASSERT3U(blkid + nblks, <=, dn->dn_phys->dn_nblkptr);
- free_blocks(dn, bp + blkid, nblks, tx);
- } else {
- int shift = (dnlevel - 1) *
- (dn->dn_phys->dn_indblkshift - SPA_BLKPTRSHIFT);
- int start = blkid >> shift;
- int end = (blkid + nblks - 1) >> shift;
- dmu_buf_impl_t *db;
- int i;
-
- ASSERT(start < dn->dn_phys->dn_nblkptr);
- bp += start;
- for (i = start; i <= end; i++, bp++) {
- if (BP_IS_HOLE(bp))
- continue;
- rw_enter(&dn->dn_struct_rwlock, RW_READER);
- VERIFY0(dbuf_hold_impl(dn, dnlevel - 1, i,
- TRUE, FALSE, FTAG, &db));
- rw_exit(&dn->dn_struct_rwlock);
-
- free_children(db, blkid, nblks, tx);
- dbuf_rele(db, FTAG);
- }
- }
-
- if (trunc) {
- ASSERTV(uint64_t off);
- dn->dn_phys->dn_maxblkid = blkid == 0 ? 0 : blkid - 1;
-
- ASSERTV(off = (dn->dn_phys->dn_maxblkid + 1) *
- (dn->dn_phys->dn_datablkszsec << SPA_MINBLOCKSHIFT));
- ASSERT(off < dn->dn_phys->dn_maxblkid ||
- dn->dn_phys->dn_maxblkid == 0 ||
- dnode_next_offset(dn, 0, &off, 1, 1, 0) != 0);
- }
-}
-
-typedef struct dnode_sync_free_range_arg {
- dnode_t *dsfra_dnode;
- dmu_tx_t *dsfra_tx;
-} dnode_sync_free_range_arg_t;
-
-static void
-dnode_sync_free_range(void *arg, uint64_t blkid, uint64_t nblks)
-{
- dnode_sync_free_range_arg_t *dsfra = arg;
- dnode_t *dn = dsfra->dsfra_dnode;
-
- mutex_exit(&dn->dn_mtx);
- dnode_sync_free_range_impl(dn, blkid, nblks, dsfra->dsfra_tx);
- mutex_enter(&dn->dn_mtx);
-}
-
-/*
- * Try to kick all the dnode's dbufs out of the cache...
- */
-void
-dnode_evict_dbufs(dnode_t *dn)
-{
- dmu_buf_impl_t *db_marker;
- dmu_buf_impl_t *db, *db_next;
-
- db_marker = kmem_alloc(sizeof (dmu_buf_impl_t), KM_SLEEP);
-
- mutex_enter(&dn->dn_dbufs_mtx);
- for (db = avl_first(&dn->dn_dbufs); db != NULL; db = db_next) {
-
-#ifdef DEBUG
- DB_DNODE_ENTER(db);
- ASSERT3P(DB_DNODE(db), ==, dn);
- DB_DNODE_EXIT(db);
-#endif /* DEBUG */
-
- mutex_enter(&db->db_mtx);
- if (db->db_state != DB_EVICTING &&
- refcount_is_zero(&db->db_holds)) {
- db_marker->db_level = db->db_level;
- db_marker->db_blkid = db->db_blkid;
- db_marker->db_state = DB_SEARCH;
- avl_insert_here(&dn->dn_dbufs, db_marker, db,
- AVL_BEFORE);
-
- dbuf_destroy(db);
-
- db_next = AVL_NEXT(&dn->dn_dbufs, db_marker);
- avl_remove(&dn->dn_dbufs, db_marker);
- } else {
- db->db_pending_evict = TRUE;
- mutex_exit(&db->db_mtx);
- db_next = AVL_NEXT(&dn->dn_dbufs, db);
- }
- }
- mutex_exit(&dn->dn_dbufs_mtx);
-
- kmem_free(db_marker, sizeof (dmu_buf_impl_t));
-
- dnode_evict_bonus(dn);
-}
-
-void
-dnode_evict_bonus(dnode_t *dn)
-{
- rw_enter(&dn->dn_struct_rwlock, RW_WRITER);
- if (dn->dn_bonus != NULL) {
- if (refcount_is_zero(&dn->dn_bonus->db_holds)) {
- mutex_enter(&dn->dn_bonus->db_mtx);
- dbuf_destroy(dn->dn_bonus);
- dn->dn_bonus = NULL;
- } else {
- dn->dn_bonus->db_pending_evict = TRUE;
- }
- }
- rw_exit(&dn->dn_struct_rwlock);
-}
-
-static void
-dnode_undirty_dbufs(list_t *list)
-{
- dbuf_dirty_record_t *dr;
-
- while ((dr = list_head(list))) {
- dmu_buf_impl_t *db = dr->dr_dbuf;
- uint64_t txg = dr->dr_txg;
-
- if (db->db_level != 0)
- dnode_undirty_dbufs(&dr->dt.di.dr_children);
-
- mutex_enter(&db->db_mtx);
- /* XXX - use dbuf_undirty()? */
- list_remove(list, dr);
- ASSERT(db->db_last_dirty == dr);
- db->db_last_dirty = NULL;
- db->db_dirtycnt -= 1;
- if (db->db_level == 0) {
- ASSERT(db->db_blkid == DMU_BONUS_BLKID ||
- dr->dt.dl.dr_data == db->db_buf);
- dbuf_unoverride(dr);
- } else {
- mutex_destroy(&dr->dt.di.dr_mtx);
- list_destroy(&dr->dt.di.dr_children);
- }
- kmem_free(dr, sizeof (dbuf_dirty_record_t));
- dbuf_rele_and_unlock(db, (void *)(uintptr_t)txg);
- }
-}
-
-static void
-dnode_sync_free(dnode_t *dn, dmu_tx_t *tx)
-{
- int txgoff = tx->tx_txg & TXG_MASK;
-
- ASSERT(dmu_tx_is_syncing(tx));
-
- /*
- * Our contents should have been freed in dnode_sync() by the
- * free range record inserted by the caller of dnode_free().
- */
- ASSERT0(DN_USED_BYTES(dn->dn_phys));
- ASSERT(BP_IS_HOLE(dn->dn_phys->dn_blkptr));
-
- dnode_undirty_dbufs(&dn->dn_dirty_records[txgoff]);
- dnode_evict_dbufs(dn);
-
- /*
- * XXX - It would be nice to assert this, but we may still
- * have residual holds from async evictions from the arc...
- *
- * zfs_obj_to_path() also depends on this being
- * commented out.
- *
- * ASSERT3U(refcount_count(&dn->dn_holds), ==, 1);
- */
-
- /* Undirty next bits */
- dn->dn_next_nlevels[txgoff] = 0;
- dn->dn_next_indblkshift[txgoff] = 0;
- dn->dn_next_blksz[txgoff] = 0;
-
- /* ASSERT(blkptrs are zero); */
- ASSERT(dn->dn_phys->dn_type != DMU_OT_NONE);
- ASSERT(dn->dn_type != DMU_OT_NONE);
-
- ASSERT(dn->dn_free_txg > 0);
- if (dn->dn_allocated_txg != dn->dn_free_txg)
- dmu_buf_will_dirty(&dn->dn_dbuf->db, tx);
- bzero(dn->dn_phys, sizeof (dnode_phys_t) * dn->dn_num_slots);
-
- mutex_enter(&dn->dn_mtx);
- dn->dn_type = DMU_OT_NONE;
- dn->dn_maxblkid = 0;
- dn->dn_allocated_txg = 0;
- dn->dn_free_txg = 0;
- dn->dn_have_spill = B_FALSE;
- mutex_exit(&dn->dn_mtx);
-
- ASSERT(dn->dn_object != DMU_META_DNODE_OBJECT);
-
- dnode_rele(dn, (void *)(uintptr_t)tx->tx_txg);
- /*
- * Now that we've released our hold, the dnode may
- * be evicted, so we mustn't access it.
- */
-}
-
-/*
- * Write out the dnode's dirty buffers.
- */
-void
-dnode_sync(dnode_t *dn, dmu_tx_t *tx)
-{
- dnode_phys_t *dnp = dn->dn_phys;
- int txgoff = tx->tx_txg & TXG_MASK;
- list_t *list = &dn->dn_dirty_records[txgoff];
- boolean_t kill_spill = B_FALSE;
- boolean_t freeing_dnode;
- ASSERTV(static const dnode_phys_t zerodn = { 0 });
-
- ASSERT(dmu_tx_is_syncing(tx));
- ASSERT(dnp->dn_type != DMU_OT_NONE || dn->dn_allocated_txg);
- ASSERT(dnp->dn_type != DMU_OT_NONE ||
- bcmp(dnp, &zerodn, DNODE_MIN_SIZE) == 0);
- DNODE_VERIFY(dn);
-
- ASSERT(dn->dn_dbuf == NULL || arc_released(dn->dn_dbuf->db_buf));
-
- if (dmu_objset_userused_enabled(dn->dn_objset) &&
- !DMU_OBJECT_IS_SPECIAL(dn->dn_object)) {
- mutex_enter(&dn->dn_mtx);
- dn->dn_oldused = DN_USED_BYTES(dn->dn_phys);
- dn->dn_oldflags = dn->dn_phys->dn_flags;
- dn->dn_phys->dn_flags |= DNODE_FLAG_USERUSED_ACCOUNTED;
- if (dmu_objset_userobjused_enabled(dn->dn_objset))
- dn->dn_phys->dn_flags |=
- DNODE_FLAG_USEROBJUSED_ACCOUNTED;
- mutex_exit(&dn->dn_mtx);
- dmu_objset_userquota_get_ids(dn, B_FALSE, tx);
- } else {
- /* Once we account for it, we should always account for it. */
- ASSERT(!(dn->dn_phys->dn_flags &
- DNODE_FLAG_USERUSED_ACCOUNTED));
- ASSERT(!(dn->dn_phys->dn_flags &
- DNODE_FLAG_USEROBJUSED_ACCOUNTED));
- }
-
- mutex_enter(&dn->dn_mtx);
- if (dn->dn_allocated_txg == tx->tx_txg) {
- /* The dnode is newly allocated or reallocated */
- if (dnp->dn_type == DMU_OT_NONE) {
- /* this is a first alloc, not a realloc */
- dnp->dn_nlevels = 1;
- dnp->dn_nblkptr = dn->dn_nblkptr;
- }
-
- dnp->dn_type = dn->dn_type;
- dnp->dn_bonustype = dn->dn_bonustype;
- dnp->dn_bonuslen = dn->dn_bonuslen;
- }
-
- dnp->dn_extra_slots = dn->dn_num_slots - 1;
-
- ASSERT(dnp->dn_nlevels > 1 ||
- BP_IS_HOLE(&dnp->dn_blkptr[0]) ||
- BP_IS_EMBEDDED(&dnp->dn_blkptr[0]) ||
- BP_GET_LSIZE(&dnp->dn_blkptr[0]) ==
- dnp->dn_datablkszsec << SPA_MINBLOCKSHIFT);
- ASSERT(dnp->dn_nlevels < 2 ||
- BP_IS_HOLE(&dnp->dn_blkptr[0]) ||
- BP_GET_LSIZE(&dnp->dn_blkptr[0]) == 1 << dnp->dn_indblkshift);
-
- if (dn->dn_next_type[txgoff] != 0) {
- dnp->dn_type = dn->dn_type;
- dn->dn_next_type[txgoff] = 0;
- }
-
- if (dn->dn_next_blksz[txgoff] != 0) {
- ASSERT(P2PHASE(dn->dn_next_blksz[txgoff],
- SPA_MINBLOCKSIZE) == 0);
- ASSERT(BP_IS_HOLE(&dnp->dn_blkptr[0]) ||
- dn->dn_maxblkid == 0 || list_head(list) != NULL ||
- dn->dn_next_blksz[txgoff] >> SPA_MINBLOCKSHIFT ==
- dnp->dn_datablkszsec ||
- range_tree_space(dn->dn_free_ranges[txgoff]) != 0);
- dnp->dn_datablkszsec =
- dn->dn_next_blksz[txgoff] >> SPA_MINBLOCKSHIFT;
- dn->dn_next_blksz[txgoff] = 0;
- }
-
- if (dn->dn_next_bonuslen[txgoff] != 0) {
- if (dn->dn_next_bonuslen[txgoff] == DN_ZERO_BONUSLEN)
- dnp->dn_bonuslen = 0;
- else
- dnp->dn_bonuslen = dn->dn_next_bonuslen[txgoff];
- ASSERT(dnp->dn_bonuslen <=
- DN_SLOTS_TO_BONUSLEN(dnp->dn_extra_slots + 1));
- dn->dn_next_bonuslen[txgoff] = 0;
- }
-
- if (dn->dn_next_bonustype[txgoff] != 0) {
- ASSERT(DMU_OT_IS_VALID(dn->dn_next_bonustype[txgoff]));
- dnp->dn_bonustype = dn->dn_next_bonustype[txgoff];
- dn->dn_next_bonustype[txgoff] = 0;
- }
-
- freeing_dnode = dn->dn_free_txg > 0 && dn->dn_free_txg <= tx->tx_txg;
-
- /*
- * Remove the spill block if we have been explicitly asked to
- * remove it, or if the object is being removed.
- */
- if (dn->dn_rm_spillblk[txgoff] || freeing_dnode) {
- if (dnp->dn_flags & DNODE_FLAG_SPILL_BLKPTR)
- kill_spill = B_TRUE;
- dn->dn_rm_spillblk[txgoff] = 0;
- }
-
- if (dn->dn_next_indblkshift[txgoff] != 0) {
- ASSERT(dnp->dn_nlevels == 1);
- dnp->dn_indblkshift = dn->dn_next_indblkshift[txgoff];
- dn->dn_next_indblkshift[txgoff] = 0;
- }
-
- /*
- * Just take the live (open-context) values for checksum and compress.
- * Strictly speaking it's a future leak, but nothing bad happens if we
- * start using the new checksum or compress algorithm a little early.
- */
- dnp->dn_checksum = dn->dn_checksum;
- dnp->dn_compress = dn->dn_compress;
-
- mutex_exit(&dn->dn_mtx);
-
- if (kill_spill) {
- free_blocks(dn, DN_SPILL_BLKPTR(dn->dn_phys), 1, tx);
- mutex_enter(&dn->dn_mtx);
- dnp->dn_flags &= ~DNODE_FLAG_SPILL_BLKPTR;
- mutex_exit(&dn->dn_mtx);
- }
-
- /* process all the "freed" ranges in the file */
- if (dn->dn_free_ranges[txgoff] != NULL) {
- dnode_sync_free_range_arg_t dsfra;
- dsfra.dsfra_dnode = dn;
- dsfra.dsfra_tx = tx;
- mutex_enter(&dn->dn_mtx);
- range_tree_vacate(dn->dn_free_ranges[txgoff],
- dnode_sync_free_range, &dsfra);
- range_tree_destroy(dn->dn_free_ranges[txgoff]);
- dn->dn_free_ranges[txgoff] = NULL;
- mutex_exit(&dn->dn_mtx);
- }
-
- if (freeing_dnode) {
- dn->dn_objset->os_freed_dnodes++;
- dnode_sync_free(dn, tx);
- return;
- }
-
- if (dn->dn_num_slots > DNODE_MIN_SLOTS) {
- dsl_dataset_t *ds = dn->dn_objset->os_dsl_dataset;
- mutex_enter(&ds->ds_lock);
- ds->ds_feature_activation_needed[SPA_FEATURE_LARGE_DNODE] =
- B_TRUE;
- mutex_exit(&ds->ds_lock);
- }
-
- if (dn->dn_next_nlevels[txgoff]) {
- dnode_increase_indirection(dn, tx);
- dn->dn_next_nlevels[txgoff] = 0;
- }
-
- if (dn->dn_next_nblkptr[txgoff]) {
- /* this should only happen on a realloc */
- ASSERT(dn->dn_allocated_txg == tx->tx_txg);
- if (dn->dn_next_nblkptr[txgoff] > dnp->dn_nblkptr) {
- /* zero the new blkptrs we are gaining */
- bzero(dnp->dn_blkptr + dnp->dn_nblkptr,
- sizeof (blkptr_t) *
- (dn->dn_next_nblkptr[txgoff] - dnp->dn_nblkptr));
-#ifdef ZFS_DEBUG
- } else {
- int i;
- ASSERT(dn->dn_next_nblkptr[txgoff] < dnp->dn_nblkptr);
- /* the blkptrs we are losing better be unallocated */
- for (i = 0; i < dnp->dn_nblkptr; i++) {
- if (i >= dn->dn_next_nblkptr[txgoff])
- ASSERT(BP_IS_HOLE(&dnp->dn_blkptr[i]));
- }
-#endif
- }
- mutex_enter(&dn->dn_mtx);
- dnp->dn_nblkptr = dn->dn_next_nblkptr[txgoff];
- dn->dn_next_nblkptr[txgoff] = 0;
- mutex_exit(&dn->dn_mtx);
- }
-
- dbuf_sync_list(list, dn->dn_phys->dn_nlevels - 1, tx);
-
- if (!DMU_OBJECT_IS_SPECIAL(dn->dn_object)) {
- ASSERT3P(list_head(list), ==, NULL);
- dnode_rele(dn, (void *)(uintptr_t)tx->tx_txg);
- }
-
- /*
- * Although we have dropped our reference to the dnode, it
- * can't be evicted until its written, and we haven't yet
- * initiated the IO for the dnode's dbuf.
- */
-}
projects / mirror_ubuntu-bionic-kernel.git / blobdiff