1fa9e4066Sahrens /* 2fa9e4066Sahrens * CDDL HEADER START 3fa9e4066Sahrens * 4fa9e4066Sahrens * The contents of this file are subject to the terms of the 5ea8dc4b6Seschrock * Common Development and Distribution License (the "License"). 6ea8dc4b6Seschrock * You may not use this file except in compliance with the License. 7fa9e4066Sahrens * 8fa9e4066Sahrens * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9fa9e4066Sahrens * or http://www.opensolaris.org/os/licensing. 10fa9e4066Sahrens * See the License for the specific language governing permissions 11fa9e4066Sahrens * and limitations under the License. 12fa9e4066Sahrens * 13fa9e4066Sahrens * When distributing Covered Code, include this CDDL HEADER in each 14fa9e4066Sahrens * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15fa9e4066Sahrens * If applicable, add the following below this CDDL HEADER, with the 16fa9e4066Sahrens * fields enclosed by brackets "[]" replaced with your own identifying 17fa9e4066Sahrens * information: Portions Copyright [yyyy] [name of copyright owner] 18fa9e4066Sahrens * 19fa9e4066Sahrens * CDDL HEADER END 20fa9e4066Sahrens */ 21ad135b5dSChristopher Siden 22fa9e4066Sahrens /* 2306e0070dSMark Shellenbaum * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. 24bf16b11eSMatthew Ahrens * Copyright (c) 2012, 2014 by Delphix. All rights reserved. 25*bc9014e6SJustin Gibbs * Copyright (c) 2014 Spectra Logic Corporation, All rights reserved. 26fa9e4066Sahrens */ 27fa9e4066Sahrens 28fa9e4066Sahrens #include <sys/zfs_context.h> 29fa9e4066Sahrens #include <sys/dbuf.h> 30fa9e4066Sahrens #include <sys/dnode.h> 31fa9e4066Sahrens #include <sys/dmu.h> 32fa9e4066Sahrens #include <sys/dmu_tx.h> 33fa9e4066Sahrens #include <sys/dmu_objset.h> 34fa9e4066Sahrens #include <sys/dsl_dataset.h> 35fa9e4066Sahrens #include <sys/spa.h> 36bf16b11eSMatthew Ahrens #include <sys/range_tree.h> 3743466aaeSMax Grossman #include <sys/zfeature.h> 38fa9e4066Sahrens 39fa9e4066Sahrens static void 40fa9e4066Sahrens dnode_increase_indirection(dnode_t *dn, dmu_tx_t *tx) 41fa9e4066Sahrens { 42fa9e4066Sahrens dmu_buf_impl_t *db; 43c717a561Smaybee int txgoff = tx->tx_txg & TXG_MASK; 44c717a561Smaybee int nblkptr = dn->dn_phys->dn_nblkptr; 45c717a561Smaybee int old_toplvl = dn->dn_phys->dn_nlevels - 1; 46c717a561Smaybee int new_level = dn->dn_next_nlevels[txgoff]; 47fa9e4066Sahrens int i; 48fa9e4066Sahrens 49c717a561Smaybee rw_enter(&dn->dn_struct_rwlock, RW_WRITER); 50c717a561Smaybee 51c717a561Smaybee /* this dnode can't be paged out because it's dirty */ 52fa9e4066Sahrens ASSERT(dn->dn_phys->dn_type != DMU_OT_NONE); 53fa9e4066Sahrens ASSERT(RW_WRITE_HELD(&dn->dn_struct_rwlock)); 54c717a561Smaybee ASSERT(new_level > 1 && dn->dn_phys->dn_nlevels > 0); 55fa9e4066Sahrens 56fa9e4066Sahrens db = dbuf_hold_level(dn, dn->dn_phys->dn_nlevels, 0, FTAG); 57ea8dc4b6Seschrock ASSERT(db != NULL); 58c717a561Smaybee 59c717a561Smaybee dn->dn_phys->dn_nlevels = new_level; 60f82bfe17Sgw dprintf("os=%p obj=%llu, increase to %d\n", dn->dn_objset, 61f82bfe17Sgw dn->dn_object, dn->dn_phys->dn_nlevels); 62c717a561Smaybee 63c717a561Smaybee /* check for existing blkptrs in the dnode */ 64c717a561Smaybee for (i = 0; i < nblkptr; i++) 65fa9e4066Sahrens if (!BP_IS_HOLE(&dn->dn_phys->dn_blkptr[i])) 66fa9e4066Sahrens break; 67c717a561Smaybee if (i != nblkptr) { 68c717a561Smaybee /* transfer dnode's block pointers to new indirect block */ 69c717a561Smaybee (void) dbuf_read(db, NULL, DB_RF_MUST_SUCCEED|DB_RF_HAVESTRUCT); 70c717a561Smaybee ASSERT(db->db.db_data); 71c717a561Smaybee ASSERT(arc_released(db->db_buf)); 72c717a561Smaybee ASSERT3U(sizeof (blkptr_t) * nblkptr, <=, db->db.db_size); 73fa9e4066Sahrens bcopy(dn->dn_phys->dn_blkptr, db->db.db_data, 74c717a561Smaybee sizeof (blkptr_t) * nblkptr); 756b4acc8bSahrens arc_buf_freeze(db->db_buf); 76fa9e4066Sahrens } 77fa9e4066Sahrens 78fa9e4066Sahrens /* set dbuf's parent pointers to new indirect buf */ 79c717a561Smaybee for (i = 0; i < nblkptr; i++) { 80c717a561Smaybee dmu_buf_impl_t *child = dbuf_find(dn, old_toplvl, i); 81c717a561Smaybee 82fa9e4066Sahrens if (child == NULL) 83fa9e4066Sahrens continue; 84744947dcSTom Erickson #ifdef DEBUG 85744947dcSTom Erickson DB_DNODE_ENTER(child); 86744947dcSTom Erickson ASSERT3P(DB_DNODE(child), ==, dn); 87744947dcSTom Erickson DB_DNODE_EXIT(child); 88744947dcSTom Erickson #endif /* DEBUG */ 89c717a561Smaybee if (child->db_parent && child->db_parent != dn->dn_dbuf) { 90c717a561Smaybee ASSERT(child->db_parent->db_level == db->db_level); 91c717a561Smaybee ASSERT(child->db_blkptr != 92c717a561Smaybee &dn->dn_phys->dn_blkptr[child->db_blkid]); 93fa9e4066Sahrens mutex_exit(&child->db_mtx); 94fa9e4066Sahrens continue; 95fa9e4066Sahrens } 96c717a561Smaybee ASSERT(child->db_parent == NULL || 97c717a561Smaybee child->db_parent == dn->dn_dbuf); 98c717a561Smaybee 99c717a561Smaybee child->db_parent = db; 100c717a561Smaybee dbuf_add_ref(db, child); 101c717a561Smaybee if (db->db.db_data) 102c717a561Smaybee child->db_blkptr = (blkptr_t *)db->db.db_data + i; 103c717a561Smaybee else 104c717a561Smaybee child->db_blkptr = NULL; 105c717a561Smaybee dprintf_dbuf_bp(child, child->db_blkptr, 106c717a561Smaybee "changed db_blkptr to new indirect %s", ""); 107fa9e4066Sahrens 108fa9e4066Sahrens mutex_exit(&child->db_mtx); 109fa9e4066Sahrens } 110fa9e4066Sahrens 111c717a561Smaybee bzero(dn->dn_phys->dn_blkptr, sizeof (blkptr_t) * nblkptr); 112fa9e4066Sahrens 113ea8dc4b6Seschrock dbuf_rele(db, FTAG); 114c717a561Smaybee 115c717a561Smaybee rw_exit(&dn->dn_struct_rwlock); 116fa9e4066Sahrens } 117fa9e4066Sahrens 11843466aaeSMax Grossman static void 119fa9e4066Sahrens free_blocks(dnode_t *dn, blkptr_t *bp, int num, dmu_tx_t *tx) 120fa9e4066Sahrens { 121cdb0ab79Smaybee dsl_dataset_t *ds = dn->dn_objset->os_dsl_dataset; 122fa9e4066Sahrens uint64_t bytesfreed = 0; 123fa9e4066Sahrens 124cdb0ab79Smaybee dprintf("ds=%p obj=%llx num=%d\n", ds, dn->dn_object, num); 125fa9e4066Sahrens 12643466aaeSMax Grossman for (int i = 0; i < num; i++, bp++) { 127fa9e4066Sahrens if (BP_IS_HOLE(bp)) 128fa9e4066Sahrens continue; 129fa9e4066Sahrens 130b24ab676SJeff Bonwick bytesfreed += dsl_dataset_block_kill(ds, bp, tx, B_FALSE); 13199653d4eSeschrock ASSERT3U(bytesfreed, <=, DN_USED_BYTES(dn->dn_phys)); 13243466aaeSMax Grossman 13343466aaeSMax Grossman /* 13443466aaeSMax Grossman * Save some useful information on the holes being 13543466aaeSMax Grossman * punched, including logical size, type, and indirection 13643466aaeSMax Grossman * level. Retaining birth time enables detection of when 13743466aaeSMax Grossman * holes are punched for reducing the number of free 13843466aaeSMax Grossman * records transmitted during a zfs send. 13943466aaeSMax Grossman */ 14043466aaeSMax Grossman 14143466aaeSMax Grossman uint64_t lsize = BP_GET_LSIZE(bp); 14243466aaeSMax Grossman dmu_object_type_t type = BP_GET_TYPE(bp); 14343466aaeSMax Grossman uint64_t lvl = BP_GET_LEVEL(bp); 14443466aaeSMax Grossman 145c717a561Smaybee bzero(bp, sizeof (blkptr_t)); 14643466aaeSMax Grossman 14743466aaeSMax Grossman if (spa_feature_is_active(dn->dn_objset->os_spa, 14843466aaeSMax Grossman SPA_FEATURE_HOLE_BIRTH)) { 14943466aaeSMax Grossman BP_SET_LSIZE(bp, lsize); 15043466aaeSMax Grossman BP_SET_TYPE(bp, type); 15143466aaeSMax Grossman BP_SET_LEVEL(bp, lvl); 15243466aaeSMax Grossman BP_SET_BIRTH(bp, dmu_tx_get_txg(tx), 0); 15343466aaeSMax Grossman } 154fa9e4066Sahrens } 155fa9e4066Sahrens dnode_diduse_space(dn, -bytesfreed); 156fa9e4066Sahrens } 157fa9e4066Sahrens 1589c9dc39aSek #ifdef ZFS_DEBUG 159fa9e4066Sahrens static void 160fa9e4066Sahrens free_verify(dmu_buf_impl_t *db, uint64_t start, uint64_t end, dmu_tx_t *tx) 161fa9e4066Sahrens { 162fa9e4066Sahrens int off, num; 163fa9e4066Sahrens int i, err, epbs; 164fa9e4066Sahrens uint64_t txg = tx->tx_txg; 165744947dcSTom Erickson dnode_t *dn; 166fa9e4066Sahrens 167744947dcSTom Erickson DB_DNODE_ENTER(db); 168744947dcSTom Erickson dn = DB_DNODE(db); 169744947dcSTom Erickson epbs = dn->dn_phys->dn_indblkshift - SPA_BLKPTRSHIFT; 170fa9e4066Sahrens off = start - (db->db_blkid * 1<<epbs); 171fa9e4066Sahrens num = end - start + 1; 172fa9e4066Sahrens 173fa9e4066Sahrens ASSERT3U(off, >=, 0); 174fa9e4066Sahrens ASSERT3U(num, >=, 0); 175fa9e4066Sahrens ASSERT3U(db->db_level, >, 0); 176744947dcSTom Erickson ASSERT3U(db->db.db_size, ==, 1 << dn->dn_phys->dn_indblkshift); 177fa9e4066Sahrens ASSERT3U(off+num, <=, db->db.db_size >> SPA_BLKPTRSHIFT); 178fa9e4066Sahrens ASSERT(db->db_blkptr != NULL); 179fa9e4066Sahrens 180fa9e4066Sahrens for (i = off; i < off+num; i++) { 181fa9e4066Sahrens uint64_t *buf; 182fa9e4066Sahrens dmu_buf_impl_t *child; 183c717a561Smaybee dbuf_dirty_record_t *dr; 184c717a561Smaybee int j; 185fa9e4066Sahrens 186fa9e4066Sahrens ASSERT(db->db_level == 1); 187fa9e4066Sahrens 188744947dcSTom Erickson rw_enter(&dn->dn_struct_rwlock, RW_READER); 189744947dcSTom Erickson err = dbuf_hold_impl(dn, db->db_level-1, 190f82bfe17Sgw (db->db_blkid << epbs) + i, TRUE, FTAG, &child); 191744947dcSTom Erickson rw_exit(&dn->dn_struct_rwlock); 192fa9e4066Sahrens if (err == ENOENT) 193fa9e4066Sahrens continue; 194fa9e4066Sahrens ASSERT(err == 0); 195fa9e4066Sahrens ASSERT(child->db_level == 0); 196c717a561Smaybee dr = child->db_last_dirty; 197c717a561Smaybee while (dr && dr->dr_txg > txg) 198c717a561Smaybee dr = dr->dr_next; 199c717a561Smaybee ASSERT(dr == NULL || dr->dr_txg == txg); 200c717a561Smaybee 201c717a561Smaybee /* data_old better be zeroed */ 202c717a561Smaybee if (dr) { 203c717a561Smaybee buf = dr->dt.dl.dr_data->b_data; 204fa9e4066Sahrens for (j = 0; j < child->db.db_size >> 3; j++) { 205fa9e4066Sahrens if (buf[j] != 0) { 206fa9e4066Sahrens panic("freed data not zero: " 207fa9e4066Sahrens "child=%p i=%d off=%d num=%d\n", 208903a11ebSrh (void *)child, i, off, num); 209fa9e4066Sahrens } 210fa9e4066Sahrens } 211fa9e4066Sahrens } 212fa9e4066Sahrens 213fa9e4066Sahrens /* 214fa9e4066Sahrens * db_data better be zeroed unless it's dirty in a 215fa9e4066Sahrens * future txg. 216fa9e4066Sahrens */ 217fa9e4066Sahrens mutex_enter(&child->db_mtx); 218fa9e4066Sahrens buf = child->db.db_data; 219fa9e4066Sahrens if (buf != NULL && child->db_state != DB_FILL && 220c717a561Smaybee child->db_last_dirty == NULL) { 221fa9e4066Sahrens for (j = 0; j < child->db.db_size >> 3; j++) { 222fa9e4066Sahrens if (buf[j] != 0) { 223fa9e4066Sahrens panic("freed data not zero: " 224fa9e4066Sahrens "child=%p i=%d off=%d num=%d\n", 225903a11ebSrh (void *)child, i, off, num); 226fa9e4066Sahrens } 227fa9e4066Sahrens } 228fa9e4066Sahrens } 229fa9e4066Sahrens mutex_exit(&child->db_mtx); 230fa9e4066Sahrens 231ea8dc4b6Seschrock dbuf_rele(child, FTAG); 232fa9e4066Sahrens } 233744947dcSTom Erickson DB_DNODE_EXIT(db); 234fa9e4066Sahrens } 2359c9dc39aSek #endif 236fa9e4066Sahrens 23743466aaeSMax Grossman static void 23843466aaeSMax Grossman free_children(dmu_buf_impl_t *db, uint64_t blkid, uint64_t nblks, 239fa9e4066Sahrens dmu_tx_t *tx) 240fa9e4066Sahrens { 241744947dcSTom Erickson dnode_t *dn; 242fa9e4066Sahrens blkptr_t *bp; 243fa9e4066Sahrens dmu_buf_impl_t *subdb; 244fa9e4066Sahrens uint64_t start, end, dbstart, dbend, i; 24543466aaeSMax Grossman int epbs, shift; 246cdb0ab79Smaybee 247cdb0ab79Smaybee /* 248cdb0ab79Smaybee * There is a small possibility that this block will not be cached: 249cdb0ab79Smaybee * 1 - if level > 1 and there are no children with level <= 1 25043466aaeSMax Grossman * 2 - if this block was evicted since we read it from 25143466aaeSMax Grossman * dmu_tx_hold_free(). 252cdb0ab79Smaybee */ 253cdb0ab79Smaybee if (db->db_state != DB_CACHED) 254cdb0ab79Smaybee (void) dbuf_read(db, NULL, DB_RF_MUST_SUCCEED); 255fa9e4066Sahrens 2563f9d6ad7SLin Ling dbuf_release_bp(db); 25743466aaeSMax Grossman bp = db->db.db_data; 258fa9e4066Sahrens 259744947dcSTom Erickson DB_DNODE_ENTER(db); 260744947dcSTom Erickson dn = DB_DNODE(db); 261744947dcSTom Erickson epbs = dn->dn_phys->dn_indblkshift - SPA_BLKPTRSHIFT; 262fa9e4066Sahrens shift = (db->db_level - 1) * epbs; 263fa9e4066Sahrens dbstart = db->db_blkid << epbs; 264fa9e4066Sahrens start = blkid >> shift; 265fa9e4066Sahrens if (dbstart < start) { 266fa9e4066Sahrens bp += start - dbstart; 267fa9e4066Sahrens } else { 268fa9e4066Sahrens start = dbstart; 269fa9e4066Sahrens } 270fa9e4066Sahrens dbend = ((db->db_blkid + 1) << epbs) - 1; 271fa9e4066Sahrens end = (blkid + nblks - 1) >> shift; 272fa9e4066Sahrens if (dbend <= end) 273fa9e4066Sahrens end = dbend; 27443466aaeSMax Grossman 275fa9e4066Sahrens ASSERT3U(start, <=, end); 276fa9e4066Sahrens 277fa9e4066Sahrens if (db->db_level == 1) { 2789c9dc39aSek FREE_VERIFY(db, start, end, tx); 27943466aaeSMax Grossman free_blocks(dn, bp, end-start+1, tx); 28043466aaeSMax Grossman } else { 28143466aaeSMax Grossman for (i = start; i <= end; i++, bp++) { 28243466aaeSMax Grossman if (BP_IS_HOLE(bp)) 28343466aaeSMax Grossman continue; 28443466aaeSMax Grossman rw_enter(&dn->dn_struct_rwlock, RW_READER); 28543466aaeSMax Grossman VERIFY0(dbuf_hold_impl(dn, db->db_level - 1, 28643466aaeSMax Grossman i, B_TRUE, FTAG, &subdb)); 28743466aaeSMax Grossman rw_exit(&dn->dn_struct_rwlock); 28843466aaeSMax Grossman ASSERT3P(bp, ==, subdb->db_blkptr); 28943466aaeSMax Grossman 29043466aaeSMax Grossman free_children(subdb, blkid, nblks, tx); 29143466aaeSMax Grossman dbuf_rele(subdb, FTAG); 29243466aaeSMax Grossman } 293fa9e4066Sahrens } 294fa9e4066Sahrens 29543466aaeSMax Grossman /* If this whole block is free, free ourself too. */ 29643466aaeSMax Grossman for (i = 0, bp = db->db.db_data; i < 1 << epbs; i++, bp++) { 29743466aaeSMax Grossman if (!BP_IS_HOLE(bp)) 29843466aaeSMax Grossman break; 29943466aaeSMax Grossman } 30043466aaeSMax Grossman if (i == 1 << epbs) { 30143466aaeSMax Grossman /* didn't find any non-holes */ 30243466aaeSMax Grossman bzero(db->db.db_data, db->db.db_size); 30343466aaeSMax Grossman free_blocks(dn, db->db_blkptr, 1, tx); 30443466aaeSMax Grossman } else { 30543466aaeSMax Grossman /* 30643466aaeSMax Grossman * Partial block free; must be marked dirty so that it 30743466aaeSMax Grossman * will be written out. 30843466aaeSMax Grossman */ 30943466aaeSMax Grossman ASSERT(db->db_dirtycnt > 0); 310fa9e4066Sahrens } 31143466aaeSMax Grossman 312744947dcSTom Erickson DB_DNODE_EXIT(db); 3136b4acc8bSahrens arc_buf_freeze(db->db_buf); 314fa9e4066Sahrens } 315fa9e4066Sahrens 316fa9e4066Sahrens /* 317f7170741SWill Andrews * Traverse the indicated range of the provided file 318fa9e4066Sahrens * and "free" all the blocks contained there. 319fa9e4066Sahrens */ 320fa9e4066Sahrens static void 321bf16b11eSMatthew Ahrens dnode_sync_free_range_impl(dnode_t *dn, uint64_t blkid, uint64_t nblks, 32243466aaeSMax Grossman dmu_tx_t *tx) 323fa9e4066Sahrens { 324fa9e4066Sahrens blkptr_t *bp = dn->dn_phys->dn_blkptr; 325fa9e4066Sahrens int dnlevel = dn->dn_phys->dn_nlevels; 32643466aaeSMax Grossman boolean_t trunc = B_FALSE; 327fa9e4066Sahrens 328fa9e4066Sahrens if (blkid > dn->dn_phys->dn_maxblkid) 329fa9e4066Sahrens return; 330fa9e4066Sahrens 331fa9e4066Sahrens ASSERT(dn->dn_phys->dn_maxblkid < UINT64_MAX); 33243466aaeSMax Grossman if (blkid + nblks > dn->dn_phys->dn_maxblkid) { 333fa9e4066Sahrens nblks = dn->dn_phys->dn_maxblkid - blkid + 1; 33443466aaeSMax Grossman trunc = B_TRUE; 33543466aaeSMax Grossman } 336fa9e4066Sahrens 337fa9e4066Sahrens /* There are no indirect blocks in the object */ 338fa9e4066Sahrens if (dnlevel == 1) { 339fa9e4066Sahrens if (blkid >= dn->dn_phys->dn_nblkptr) { 340fa9e4066Sahrens /* this range was never made persistent */ 341fa9e4066Sahrens return; 342fa9e4066Sahrens } 343fa9e4066Sahrens ASSERT3U(blkid + nblks, <=, dn->dn_phys->dn_nblkptr); 34443466aaeSMax Grossman free_blocks(dn, bp + blkid, nblks, tx); 34543466aaeSMax Grossman } else { 34643466aaeSMax Grossman int shift = (dnlevel - 1) * 34743466aaeSMax Grossman (dn->dn_phys->dn_indblkshift - SPA_BLKPTRSHIFT); 34843466aaeSMax Grossman int start = blkid >> shift; 34943466aaeSMax Grossman int end = (blkid + nblks - 1) >> shift; 35043466aaeSMax Grossman dmu_buf_impl_t *db; 35143466aaeSMax Grossman 35243466aaeSMax Grossman ASSERT(start < dn->dn_phys->dn_nblkptr); 35343466aaeSMax Grossman bp += start; 35443466aaeSMax Grossman for (int i = start; i <= end; i++, bp++) { 35543466aaeSMax Grossman if (BP_IS_HOLE(bp)) 35643466aaeSMax Grossman continue; 35743466aaeSMax Grossman rw_enter(&dn->dn_struct_rwlock, RW_READER); 35843466aaeSMax Grossman VERIFY0(dbuf_hold_impl(dn, dnlevel - 1, i, 35943466aaeSMax Grossman TRUE, FTAG, &db)); 36043466aaeSMax Grossman rw_exit(&dn->dn_struct_rwlock); 36143466aaeSMax Grossman 36243466aaeSMax Grossman free_children(db, blkid, nblks, tx); 36343466aaeSMax Grossman dbuf_rele(db, FTAG); 364fa9e4066Sahrens } 365fa9e4066Sahrens } 36643466aaeSMax Grossman 367fa9e4066Sahrens if (trunc) { 36843466aaeSMax Grossman dn->dn_phys->dn_maxblkid = blkid == 0 ? 0 : blkid - 1; 36943466aaeSMax Grossman 370fa9e4066Sahrens uint64_t off = (dn->dn_phys->dn_maxblkid + 1) * 371fa9e4066Sahrens (dn->dn_phys->dn_datablkszsec << SPA_MINBLOCKSHIFT); 372fa9e4066Sahrens ASSERT(off < dn->dn_phys->dn_maxblkid || 373fa9e4066Sahrens dn->dn_phys->dn_maxblkid == 0 || 374cdb0ab79Smaybee dnode_next_offset(dn, 0, &off, 1, 1, 0) != 0); 375fa9e4066Sahrens } 376fa9e4066Sahrens } 377fa9e4066Sahrens 378bf16b11eSMatthew Ahrens typedef struct dnode_sync_free_range_arg { 379bf16b11eSMatthew Ahrens dnode_t *dsfra_dnode; 380bf16b11eSMatthew Ahrens dmu_tx_t *dsfra_tx; 381bf16b11eSMatthew Ahrens } dnode_sync_free_range_arg_t; 382bf16b11eSMatthew Ahrens 383bf16b11eSMatthew Ahrens static void 384bf16b11eSMatthew Ahrens dnode_sync_free_range(void *arg, uint64_t blkid, uint64_t nblks) 385bf16b11eSMatthew Ahrens { 386bf16b11eSMatthew Ahrens dnode_sync_free_range_arg_t *dsfra = arg; 387bf16b11eSMatthew Ahrens dnode_t *dn = dsfra->dsfra_dnode; 388bf16b11eSMatthew Ahrens 389bf16b11eSMatthew Ahrens mutex_exit(&dn->dn_mtx); 390bf16b11eSMatthew Ahrens dnode_sync_free_range_impl(dn, blkid, nblks, dsfra->dsfra_tx); 391bf16b11eSMatthew Ahrens mutex_enter(&dn->dn_mtx); 392bf16b11eSMatthew Ahrens } 393bf16b11eSMatthew Ahrens 394ea8dc4b6Seschrock /* 395f7170741SWill Andrews * Try to kick all the dnode's dbufs out of the cache... 396ea8dc4b6Seschrock */ 3971934e92fSmaybee void 3981934e92fSmaybee dnode_evict_dbufs(dnode_t *dn) 399ea8dc4b6Seschrock { 400*bc9014e6SJustin Gibbs dmu_buf_impl_t db_marker; 401*bc9014e6SJustin Gibbs dmu_buf_impl_t *db, *db_next; 402c543ec06Sahrens 403*bc9014e6SJustin Gibbs mutex_enter(&dn->dn_dbufs_mtx); 404*bc9014e6SJustin Gibbs for (db = avl_first(&dn->dn_dbufs); db != NULL; db = db_next) { 405c543ec06Sahrens 406744947dcSTom Erickson #ifdef DEBUG 407*bc9014e6SJustin Gibbs DB_DNODE_ENTER(db); 408*bc9014e6SJustin Gibbs ASSERT3P(DB_DNODE(db), ==, dn); 409*bc9014e6SJustin Gibbs DB_DNODE_EXIT(db); 410744947dcSTom Erickson #endif /* DEBUG */ 411ea8dc4b6Seschrock 412*bc9014e6SJustin Gibbs mutex_enter(&db->db_mtx); 413*bc9014e6SJustin Gibbs if (db->db_state != DB_EVICTING && 414*bc9014e6SJustin Gibbs refcount_is_zero(&db->db_holds)) { 415*bc9014e6SJustin Gibbs db_marker.db_level = db->db_level; 416*bc9014e6SJustin Gibbs db_marker.db_blkid = db->db_blkid; 417*bc9014e6SJustin Gibbs db_marker.db_state = DB_SEARCH; 418*bc9014e6SJustin Gibbs avl_insert_here(&dn->dn_dbufs, &db_marker, db, 419*bc9014e6SJustin Gibbs AVL_BEFORE); 420*bc9014e6SJustin Gibbs 421*bc9014e6SJustin Gibbs dbuf_clear(db); 422*bc9014e6SJustin Gibbs 423*bc9014e6SJustin Gibbs db_next = AVL_NEXT(&dn->dn_dbufs, &db_marker); 424*bc9014e6SJustin Gibbs avl_remove(&dn->dn_dbufs, &db_marker); 425*bc9014e6SJustin Gibbs } else { 426*bc9014e6SJustin Gibbs mutex_exit(&db->db_mtx); 427*bc9014e6SJustin Gibbs db_next = AVL_NEXT(&dn->dn_dbufs, db); 428ea8dc4b6Seschrock } 429*bc9014e6SJustin Gibbs } 430*bc9014e6SJustin Gibbs mutex_exit(&dn->dn_dbufs_mtx); 431c543ec06Sahrens 432ea8dc4b6Seschrock rw_enter(&dn->dn_struct_rwlock, RW_WRITER); 433ea8dc4b6Seschrock if (dn->dn_bonus && refcount_is_zero(&dn->dn_bonus->db_holds)) { 434ea8dc4b6Seschrock mutex_enter(&dn->dn_bonus->db_mtx); 435ea8dc4b6Seschrock dbuf_evict(dn->dn_bonus); 436ea8dc4b6Seschrock dn->dn_bonus = NULL; 437ea8dc4b6Seschrock } 438ea8dc4b6Seschrock rw_exit(&dn->dn_struct_rwlock); 439ea8dc4b6Seschrock } 440ea8dc4b6Seschrock 441c717a561Smaybee static void 442c717a561Smaybee dnode_undirty_dbufs(list_t *list) 443fa9e4066Sahrens { 444c717a561Smaybee dbuf_dirty_record_t *dr; 445fa9e4066Sahrens 446c717a561Smaybee while (dr = list_head(list)) { 447c717a561Smaybee dmu_buf_impl_t *db = dr->dr_dbuf; 448c717a561Smaybee uint64_t txg = dr->dr_txg; 449fa9e4066Sahrens 450b24ab676SJeff Bonwick if (db->db_level != 0) 451b24ab676SJeff Bonwick dnode_undirty_dbufs(&dr->dt.di.dr_children); 452b24ab676SJeff Bonwick 453fa9e4066Sahrens mutex_enter(&db->db_mtx); 454fa9e4066Sahrens /* XXX - use dbuf_undirty()? */ 455c717a561Smaybee list_remove(list, dr); 456c717a561Smaybee ASSERT(db->db_last_dirty == dr); 457c717a561Smaybee db->db_last_dirty = NULL; 458c717a561Smaybee db->db_dirtycnt -= 1; 459fa9e4066Sahrens if (db->db_level == 0) { 4600a586ceaSMark Shellenbaum ASSERT(db->db_blkid == DMU_BONUS_BLKID || 461c717a561Smaybee dr->dt.dl.dr_data == db->db_buf); 462c717a561Smaybee dbuf_unoverride(dr); 463d2b3cbbdSJorgen Lundman } else { 464d2b3cbbdSJorgen Lundman mutex_destroy(&dr->dt.di.dr_mtx); 465d2b3cbbdSJorgen Lundman list_destroy(&dr->dt.di.dr_children); 466fa9e4066Sahrens } 467c717a561Smaybee kmem_free(dr, sizeof (dbuf_dirty_record_t)); 468b24ab676SJeff Bonwick dbuf_rele_and_unlock(db, (void *)(uintptr_t)txg); 469fa9e4066Sahrens } 470c717a561Smaybee } 471fa9e4066Sahrens 472c717a561Smaybee static void 473c717a561Smaybee dnode_sync_free(dnode_t *dn, dmu_tx_t *tx) 474c717a561Smaybee { 475c717a561Smaybee int txgoff = tx->tx_txg & TXG_MASK; 476c717a561Smaybee 477c717a561Smaybee ASSERT(dmu_tx_is_syncing(tx)); 478c717a561Smaybee 479cdb0ab79Smaybee /* 480cdb0ab79Smaybee * Our contents should have been freed in dnode_sync() by the 481cdb0ab79Smaybee * free range record inserted by the caller of dnode_free(). 482cdb0ab79Smaybee */ 483fb09f5aaSMadhav Suresh ASSERT0(DN_USED_BYTES(dn->dn_phys)); 484cdb0ab79Smaybee ASSERT(BP_IS_HOLE(dn->dn_phys->dn_blkptr)); 485cdb0ab79Smaybee 486c717a561Smaybee dnode_undirty_dbufs(&dn->dn_dirty_records[txgoff]); 4871934e92fSmaybee dnode_evict_dbufs(dn); 4880f6d88adSAlex Reece ASSERT(avl_is_empty(&dn->dn_dbufs)); 489ea8dc4b6Seschrock 490ea8dc4b6Seschrock /* 491ea8dc4b6Seschrock * XXX - It would be nice to assert this, but we may still 492ea8dc4b6Seschrock * have residual holds from async evictions from the arc... 493ea8dc4b6Seschrock * 49455434c77Sek * zfs_obj_to_path() also depends on this being 49555434c77Sek * commented out. 49655434c77Sek * 497ea8dc4b6Seschrock * ASSERT3U(refcount_count(&dn->dn_holds), ==, 1); 498ea8dc4b6Seschrock */ 499fa9e4066Sahrens 500fa9e4066Sahrens /* Undirty next bits */ 501fa9e4066Sahrens dn->dn_next_nlevels[txgoff] = 0; 502fa9e4066Sahrens dn->dn_next_indblkshift[txgoff] = 0; 503c543ec06Sahrens dn->dn_next_blksz[txgoff] = 0; 504fa9e4066Sahrens 505fa9e4066Sahrens /* ASSERT(blkptrs are zero); */ 506fa9e4066Sahrens ASSERT(dn->dn_phys->dn_type != DMU_OT_NONE); 507fa9e4066Sahrens ASSERT(dn->dn_type != DMU_OT_NONE); 508fa9e4066Sahrens 509fa9e4066Sahrens ASSERT(dn->dn_free_txg > 0); 510fa9e4066Sahrens if (dn->dn_allocated_txg != dn->dn_free_txg) 51143466aaeSMax Grossman dmu_buf_will_dirty(&dn->dn_dbuf->db, tx); 512fa9e4066Sahrens bzero(dn->dn_phys, sizeof (dnode_phys_t)); 513fa9e4066Sahrens 514fa9e4066Sahrens mutex_enter(&dn->dn_mtx); 515fa9e4066Sahrens dn->dn_type = DMU_OT_NONE; 516fa9e4066Sahrens dn->dn_maxblkid = 0; 517fa9e4066Sahrens dn->dn_allocated_txg = 0; 518758f6e0bSgw dn->dn_free_txg = 0; 5190a586ceaSMark Shellenbaum dn->dn_have_spill = B_FALSE; 520fa9e4066Sahrens mutex_exit(&dn->dn_mtx); 521fa9e4066Sahrens 522ea8dc4b6Seschrock ASSERT(dn->dn_object != DMU_META_DNODE_OBJECT); 523fa9e4066Sahrens 524fa9e4066Sahrens dnode_rele(dn, (void *)(uintptr_t)tx->tx_txg); 525fa9e4066Sahrens /* 526fa9e4066Sahrens * Now that we've released our hold, the dnode may 527fa9e4066Sahrens * be evicted, so we musn't access it. 528fa9e4066Sahrens */ 529fa9e4066Sahrens } 530fa9e4066Sahrens 531fa9e4066Sahrens /* 532c717a561Smaybee * Write out the dnode's dirty buffers. 533fa9e4066Sahrens */ 534c717a561Smaybee void 535c717a561Smaybee dnode_sync(dnode_t *dn, dmu_tx_t *tx) 536fa9e4066Sahrens { 537fa9e4066Sahrens dnode_phys_t *dnp = dn->dn_phys; 538c717a561Smaybee int txgoff = tx->tx_txg & TXG_MASK; 539c717a561Smaybee list_t *list = &dn->dn_dirty_records[txgoff]; 54014843421SMatthew Ahrens static const dnode_phys_t zerodn = { 0 }; 5410a586ceaSMark Shellenbaum boolean_t kill_spill = B_FALSE; 542fa9e4066Sahrens 543fa9e4066Sahrens ASSERT(dmu_tx_is_syncing(tx)); 544fa9e4066Sahrens ASSERT(dnp->dn_type != DMU_OT_NONE || dn->dn_allocated_txg); 54514843421SMatthew Ahrens ASSERT(dnp->dn_type != DMU_OT_NONE || 54614843421SMatthew Ahrens bcmp(dnp, &zerodn, DNODE_SIZE) == 0); 5479c9dc39aSek DNODE_VERIFY(dn); 548c543ec06Sahrens 549c717a561Smaybee ASSERT(dn->dn_dbuf == NULL || arc_released(dn->dn_dbuf->db_buf)); 550fa9e4066Sahrens 55114843421SMatthew Ahrens if (dmu_objset_userused_enabled(dn->dn_objset) && 55214843421SMatthew Ahrens !DMU_OBJECT_IS_SPECIAL(dn->dn_object)) { 5530a586ceaSMark Shellenbaum mutex_enter(&dn->dn_mtx); 5540a586ceaSMark Shellenbaum dn->dn_oldused = DN_USED_BYTES(dn->dn_phys); 5550a586ceaSMark Shellenbaum dn->dn_oldflags = dn->dn_phys->dn_flags; 55614843421SMatthew Ahrens dn->dn_phys->dn_flags |= DNODE_FLAG_USERUSED_ACCOUNTED; 5570a586ceaSMark Shellenbaum mutex_exit(&dn->dn_mtx); 55806e0070dSMark Shellenbaum dmu_objset_userquota_get_ids(dn, B_FALSE, tx); 55914843421SMatthew Ahrens } else { 56014843421SMatthew Ahrens /* Once we account for it, we should always account for it. */ 56114843421SMatthew Ahrens ASSERT(!(dn->dn_phys->dn_flags & 56214843421SMatthew Ahrens DNODE_FLAG_USERUSED_ACCOUNTED)); 56314843421SMatthew Ahrens } 56414843421SMatthew Ahrens 565fa9e4066Sahrens mutex_enter(&dn->dn_mtx); 566fa9e4066Sahrens if (dn->dn_allocated_txg == tx->tx_txg) { 567fa9e4066Sahrens /* The dnode is newly allocated or reallocated */ 568fa9e4066Sahrens if (dnp->dn_type == DMU_OT_NONE) { 569fa9e4066Sahrens /* this is a first alloc, not a realloc */ 570fa9e4066Sahrens dnp->dn_nlevels = 1; 571da03de99SMark Maybee dnp->dn_nblkptr = dn->dn_nblkptr; 572fa9e4066Sahrens } 573fa9e4066Sahrens 574fa9e4066Sahrens dnp->dn_type = dn->dn_type; 575fa9e4066Sahrens dnp->dn_bonustype = dn->dn_bonustype; 576fa9e4066Sahrens dnp->dn_bonuslen = dn->dn_bonuslen; 577fa9e4066Sahrens } 578c717a561Smaybee ASSERT(dnp->dn_nlevels > 1 || 579f676ed34Sahrens BP_IS_HOLE(&dnp->dn_blkptr[0]) || 5805d7b4d43SMatthew Ahrens BP_IS_EMBEDDED(&dnp->dn_blkptr[0]) || 581f676ed34Sahrens BP_GET_LSIZE(&dnp->dn_blkptr[0]) == 582f676ed34Sahrens dnp->dn_datablkszsec << SPA_MINBLOCKSHIFT); 5835d7b4d43SMatthew Ahrens ASSERT(dnp->dn_nlevels < 2 || 5845d7b4d43SMatthew Ahrens BP_IS_HOLE(&dnp->dn_blkptr[0]) || 5855d7b4d43SMatthew Ahrens BP_GET_LSIZE(&dnp->dn_blkptr[0]) == 1 << dnp->dn_indblkshift); 586f676ed34Sahrens 5872acef22dSMatthew Ahrens if (dn->dn_next_type[txgoff] != 0) { 5882acef22dSMatthew Ahrens dnp->dn_type = dn->dn_type; 5892acef22dSMatthew Ahrens dn->dn_next_type[txgoff] = 0; 5902acef22dSMatthew Ahrens } 5912acef22dSMatthew Ahrens 5922acef22dSMatthew Ahrens if (dn->dn_next_blksz[txgoff] != 0) { 593c543ec06Sahrens ASSERT(P2PHASE(dn->dn_next_blksz[txgoff], 594fa9e4066Sahrens SPA_MINBLOCKSIZE) == 0); 595f676ed34Sahrens ASSERT(BP_IS_HOLE(&dnp->dn_blkptr[0]) || 596cdb0ab79Smaybee dn->dn_maxblkid == 0 || list_head(list) != NULL || 597347a31bcSahrens dn->dn_next_blksz[txgoff] >> SPA_MINBLOCKSHIFT == 598bf16b11eSMatthew Ahrens dnp->dn_datablkszsec || 599bf16b11eSMatthew Ahrens range_tree_space(dn->dn_free_ranges[txgoff]) != 0); 600fa9e4066Sahrens dnp->dn_datablkszsec = 601c543ec06Sahrens dn->dn_next_blksz[txgoff] >> SPA_MINBLOCKSHIFT; 602c543ec06Sahrens dn->dn_next_blksz[txgoff] = 0; 603fa9e4066Sahrens } 604fa9e4066Sahrens 6052acef22dSMatthew Ahrens if (dn->dn_next_bonuslen[txgoff] != 0) { 6061934e92fSmaybee if (dn->dn_next_bonuslen[txgoff] == DN_ZERO_BONUSLEN) 6071934e92fSmaybee dnp->dn_bonuslen = 0; 6081934e92fSmaybee else 6091934e92fSmaybee dnp->dn_bonuslen = dn->dn_next_bonuslen[txgoff]; 6101934e92fSmaybee ASSERT(dnp->dn_bonuslen <= DN_MAX_BONUSLEN); 6111934e92fSmaybee dn->dn_next_bonuslen[txgoff] = 0; 6121934e92fSmaybee } 6131934e92fSmaybee 6142acef22dSMatthew Ahrens if (dn->dn_next_bonustype[txgoff] != 0) { 615ad135b5dSChristopher Siden ASSERT(DMU_OT_IS_VALID(dn->dn_next_bonustype[txgoff])); 6160a586ceaSMark Shellenbaum dnp->dn_bonustype = dn->dn_next_bonustype[txgoff]; 6170a586ceaSMark Shellenbaum dn->dn_next_bonustype[txgoff] = 0; 6180a586ceaSMark Shellenbaum } 6190a586ceaSMark Shellenbaum 62043466aaeSMax Grossman boolean_t freeing_dnode = dn->dn_free_txg > 0 && 62143466aaeSMax Grossman dn->dn_free_txg <= tx->tx_txg; 62243466aaeSMax Grossman 6230a586ceaSMark Shellenbaum /* 624e6518318SMatthew Ahrens * Remove the spill block if we have been explicitly asked to 625e6518318SMatthew Ahrens * remove it, or if the object is being removed. 6260a586ceaSMark Shellenbaum */ 627e6518318SMatthew Ahrens if (dn->dn_rm_spillblk[txgoff] || freeing_dnode) { 628e6518318SMatthew Ahrens if (dnp->dn_flags & DNODE_FLAG_SPILL_BLKPTR) 6290a586ceaSMark Shellenbaum kill_spill = B_TRUE; 6300a586ceaSMark Shellenbaum dn->dn_rm_spillblk[txgoff] = 0; 6310a586ceaSMark Shellenbaum } 6320a586ceaSMark Shellenbaum 6332acef22dSMatthew Ahrens if (dn->dn_next_indblkshift[txgoff] != 0) { 634fa9e4066Sahrens ASSERT(dnp->dn_nlevels == 1); 635fa9e4066Sahrens dnp->dn_indblkshift = dn->dn_next_indblkshift[txgoff]; 636fa9e4066Sahrens dn->dn_next_indblkshift[txgoff] = 0; 637fa9e4066Sahrens } 638fa9e4066Sahrens 639fa9e4066Sahrens /* 640fa9e4066Sahrens * Just take the live (open-context) values for checksum and compress. 641fa9e4066Sahrens * Strictly speaking it's a future leak, but nothing bad happens if we 642fa9e4066Sahrens * start using the new checksum or compress algorithm a little early. 643fa9e4066Sahrens */ 644fa9e4066Sahrens dnp->dn_checksum = dn->dn_checksum; 645fa9e4066Sahrens dnp->dn_compress = dn->dn_compress; 646fa9e4066Sahrens 647fa9e4066Sahrens mutex_exit(&dn->dn_mtx); 648fa9e4066Sahrens 6490a586ceaSMark Shellenbaum if (kill_spill) { 65043466aaeSMax Grossman free_blocks(dn, &dn->dn_phys->dn_spill, 1, tx); 6510a586ceaSMark Shellenbaum mutex_enter(&dn->dn_mtx); 6520a586ceaSMark Shellenbaum dnp->dn_flags &= ~DNODE_FLAG_SPILL_BLKPTR; 6530a586ceaSMark Shellenbaum mutex_exit(&dn->dn_mtx); 6540a586ceaSMark Shellenbaum } 6550a586ceaSMark Shellenbaum 656fa9e4066Sahrens /* process all the "freed" ranges in the file */ 657bf16b11eSMatthew Ahrens if (dn->dn_free_ranges[txgoff] != NULL) { 658bf16b11eSMatthew Ahrens dnode_sync_free_range_arg_t dsfra; 659bf16b11eSMatthew Ahrens dsfra.dsfra_dnode = dn; 660bf16b11eSMatthew Ahrens dsfra.dsfra_tx = tx; 661cdb0ab79Smaybee mutex_enter(&dn->dn_mtx); 662bf16b11eSMatthew Ahrens range_tree_vacate(dn->dn_free_ranges[txgoff], 663bf16b11eSMatthew Ahrens dnode_sync_free_range, &dsfra); 664bf16b11eSMatthew Ahrens range_tree_destroy(dn->dn_free_ranges[txgoff]); 665bf16b11eSMatthew Ahrens dn->dn_free_ranges[txgoff] = NULL; 666cdb0ab79Smaybee mutex_exit(&dn->dn_mtx); 667fa9e4066Sahrens } 6681934e92fSmaybee 66943466aaeSMax Grossman if (freeing_dnode) { 670c717a561Smaybee dnode_sync_free(dn, tx); 671c717a561Smaybee return; 672fa9e4066Sahrens } 673fa9e4066Sahrens 674e503a685SGeorge Wilson if (dn->dn_next_nlevels[txgoff]) { 675e503a685SGeorge Wilson dnode_increase_indirection(dn, tx); 676e503a685SGeorge Wilson dn->dn_next_nlevels[txgoff] = 0; 677e503a685SGeorge Wilson } 678e503a685SGeorge Wilson 679da03de99SMark Maybee if (dn->dn_next_nblkptr[txgoff]) { 680da03de99SMark Maybee /* this should only happen on a realloc */ 681da03de99SMark Maybee ASSERT(dn->dn_allocated_txg == tx->tx_txg); 682da03de99SMark Maybee if (dn->dn_next_nblkptr[txgoff] > dnp->dn_nblkptr) { 683da03de99SMark Maybee /* zero the new blkptrs we are gaining */ 684da03de99SMark Maybee bzero(dnp->dn_blkptr + dnp->dn_nblkptr, 685da03de99SMark Maybee sizeof (blkptr_t) * 686da03de99SMark Maybee (dn->dn_next_nblkptr[txgoff] - dnp->dn_nblkptr)); 687da03de99SMark Maybee #ifdef ZFS_DEBUG 688da03de99SMark Maybee } else { 689da03de99SMark Maybee int i; 690da03de99SMark Maybee ASSERT(dn->dn_next_nblkptr[txgoff] < dnp->dn_nblkptr); 691da03de99SMark Maybee /* the blkptrs we are losing better be unallocated */ 692da03de99SMark Maybee for (i = dn->dn_next_nblkptr[txgoff]; 693da03de99SMark Maybee i < dnp->dn_nblkptr; i++) 694da03de99SMark Maybee ASSERT(BP_IS_HOLE(&dnp->dn_blkptr[i])); 695da03de99SMark Maybee #endif 696da03de99SMark Maybee } 697da03de99SMark Maybee mutex_enter(&dn->dn_mtx); 698da03de99SMark Maybee dnp->dn_nblkptr = dn->dn_next_nblkptr[txgoff]; 699da03de99SMark Maybee dn->dn_next_nblkptr[txgoff] = 0; 700da03de99SMark Maybee mutex_exit(&dn->dn_mtx); 701da03de99SMark Maybee } 702da03de99SMark Maybee 703c717a561Smaybee dbuf_sync_list(list, tx); 704fa9e4066Sahrens 70514843421SMatthew Ahrens if (!DMU_OBJECT_IS_SPECIAL(dn->dn_object)) { 706c717a561Smaybee ASSERT3P(list_head(list), ==, NULL); 707c717a561Smaybee dnode_rele(dn, (void *)(uintptr_t)tx->tx_txg); 708fa9e4066Sahrens } 709c717a561Smaybee 710c717a561Smaybee /* 711c717a561Smaybee * Although we have dropped our reference to the dnode, it 712c717a561Smaybee * can't be evicted until its written, and we haven't yet 713c717a561Smaybee * initiated the IO for the dnode's dbuf. 714c717a561Smaybee */ 715fa9e4066Sahrens } 716