Mercurial > illumos > illumos-gate
annotate usr/src/uts/common/fs/zfs/dnode.c @ 3882:f58e2c1a879e
6520462 assertion failed in zio_write_compress
6535715 assertion failed in dmu_get_replication_level when 'zpool upgrade'
6536527 want range-checking assertions when accessing dmu_ot[]
| author | ahrens |
|---|---|
| date | Thu, 22 Mar 2007 11:43:05 -0700 |
| parents | e396e0a440b1 |
| children | 3dfde0f4662d |
| rev | line source |
|---|---|
| 789 | 1 /* |
| 2 * CDDL HEADER START | |
| 3 * | |
| 4 * The contents of this file are subject to the terms of the | |
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5 * Common Development and Distribution License (the "License"). |
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6 * You may not use this file except in compliance with the License. |
| 789 | 7 * |
| 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE | |
| 9 * or http://www.opensolaris.org/os/licensing. | |
| 10 * See the License for the specific language governing permissions | |
| 11 * and limitations under the License. | |
| 12 * | |
| 13 * When distributing Covered Code, include this CDDL HEADER in each | |
| 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. | |
| 15 * If applicable, add the following below this CDDL HEADER, with the | |
| 16 * fields enclosed by brackets "[]" replaced with your own identifying | |
| 17 * information: Portions Copyright [yyyy] [name of copyright owner] | |
| 18 * | |
| 19 * CDDL HEADER END | |
| 20 */ | |
| 21 /* | |
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22 * Copyright 2007 Sun Microsystems, Inc. All rights reserved. |
| 789 | 23 * Use is subject to license terms. |
| 24 */ | |
| 25 | |
| 26 #pragma ident "%Z%%M% %I% %E% SMI" | |
| 27 | |
| 28 #include <sys/zfs_context.h> | |
| 29 #include <sys/dbuf.h> | |
| 30 #include <sys/dnode.h> | |
| 31 #include <sys/dmu.h> | |
| 32 #include <sys/dmu_impl.h> | |
| 33 #include <sys/dmu_tx.h> | |
| 34 #include <sys/dmu_objset.h> | |
| 35 #include <sys/dsl_dir.h> | |
| 36 #include <sys/dsl_dataset.h> | |
| 37 #include <sys/spa.h> | |
| 38 #include <sys/zio.h> | |
| 39 #include <sys/dmu_zfetch.h> | |
| 40 | |
| 41 static int free_range_compar(const void *node1, const void *node2); | |
| 42 | |
| 43 static kmem_cache_t *dnode_cache; | |
| 44 | |
| 45 static dnode_phys_t dnode_phys_zero; | |
| 46 | |
| 47 int zfs_default_bs = SPA_MINBLOCKSHIFT; | |
| 48 int zfs_default_ibs = DN_MAX_INDBLKSHIFT; | |
| 49 | |
| 50 /* ARGSUSED */ | |
| 51 static int | |
| 52 dnode_cons(void *arg, void *unused, int kmflag) | |
| 53 { | |
| 54 int i; | |
| 55 dnode_t *dn = arg; | |
| 56 bzero(dn, sizeof (dnode_t)); | |
| 57 | |
| 58 rw_init(&dn->dn_struct_rwlock, NULL, RW_DEFAULT, NULL); | |
| 59 mutex_init(&dn->dn_mtx, NULL, MUTEX_DEFAULT, NULL); | |
| 60 mutex_init(&dn->dn_dbufs_mtx, NULL, MUTEX_DEFAULT, NULL); | |
| 61 refcount_create(&dn->dn_holds); | |
| 62 refcount_create(&dn->dn_tx_holds); | |
| 63 | |
| 64 for (i = 0; i < TXG_SIZE; i++) { | |
| 65 avl_create(&dn->dn_ranges[i], free_range_compar, | |
| 66 sizeof (free_range_t), | |
| 67 offsetof(struct free_range, fr_node)); | |
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68 list_create(&dn->dn_dirty_records[i], |
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69 sizeof (dbuf_dirty_record_t), |
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70 offsetof(dbuf_dirty_record_t, dr_dirty_node)); |
| 789 | 71 } |
| 72 | |
| 73 list_create(&dn->dn_dbufs, sizeof (dmu_buf_impl_t), | |
| 74 offsetof(dmu_buf_impl_t, db_link)); | |
| 75 | |
| 76 return (0); | |
| 77 } | |
| 78 | |
| 79 /* ARGSUSED */ | |
| 80 static void | |
| 81 dnode_dest(void *arg, void *unused) | |
| 82 { | |
| 83 int i; | |
| 84 dnode_t *dn = arg; | |
| 85 | |
| 86 rw_destroy(&dn->dn_struct_rwlock); | |
| 87 mutex_destroy(&dn->dn_mtx); | |
| 88 mutex_destroy(&dn->dn_dbufs_mtx); | |
| 89 refcount_destroy(&dn->dn_holds); | |
| 90 refcount_destroy(&dn->dn_tx_holds); | |
| 91 | |
| 92 for (i = 0; i < TXG_SIZE; i++) { | |
| 93 avl_destroy(&dn->dn_ranges[i]); | |
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94 list_destroy(&dn->dn_dirty_records[i]); |
| 789 | 95 } |
| 96 | |
| 97 list_destroy(&dn->dn_dbufs); | |
| 98 } | |
| 99 | |
| 100 void | |
| 101 dnode_init(void) | |
| 102 { | |
| 103 dnode_cache = kmem_cache_create("dnode_t", | |
| 104 sizeof (dnode_t), | |
| 105 0, dnode_cons, dnode_dest, NULL, NULL, NULL, 0); | |
| 106 } | |
| 107 | |
| 108 void | |
| 109 dnode_fini(void) | |
| 110 { | |
| 111 kmem_cache_destroy(dnode_cache); | |
| 112 } | |
| 113 | |
| 114 | |
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115 #ifdef ZFS_DEBUG |
| 789 | 116 void |
| 117 dnode_verify(dnode_t *dn) | |
| 118 { | |
| 119 int drop_struct_lock = FALSE; | |
| 120 | |
| 121 ASSERT(dn->dn_phys); | |
| 122 ASSERT(dn->dn_objset); | |
| 123 | |
| 124 ASSERT(dn->dn_phys->dn_type < DMU_OT_NUMTYPES); | |
| 125 | |
| 126 if (!(zfs_flags & ZFS_DEBUG_DNODE_VERIFY)) | |
| 127 return; | |
| 128 | |
| 129 if (!RW_WRITE_HELD(&dn->dn_struct_rwlock)) { | |
| 130 rw_enter(&dn->dn_struct_rwlock, RW_READER); | |
| 131 drop_struct_lock = TRUE; | |
| 132 } | |
| 133 if (dn->dn_phys->dn_type != DMU_OT_NONE || dn->dn_allocated_txg != 0) { | |
| 134 int i; | |
| 135 ASSERT3U(dn->dn_indblkshift, >=, 0); | |
| 136 ASSERT3U(dn->dn_indblkshift, <=, SPA_MAXBLOCKSHIFT); | |
| 137 if (dn->dn_datablkshift) { | |
| 138 ASSERT3U(dn->dn_datablkshift, >=, SPA_MINBLOCKSHIFT); | |
| 139 ASSERT3U(dn->dn_datablkshift, <=, SPA_MAXBLOCKSHIFT); | |
| 140 ASSERT3U(1<<dn->dn_datablkshift, ==, dn->dn_datablksz); | |
| 141 } | |
| 142 ASSERT3U(dn->dn_nlevels, <=, 30); | |
| 143 ASSERT3U(dn->dn_type, <=, DMU_OT_NUMTYPES); | |
| 144 ASSERT3U(dn->dn_nblkptr, >=, 1); | |
| 145 ASSERT3U(dn->dn_nblkptr, <=, DN_MAX_NBLKPTR); | |
| 146 ASSERT3U(dn->dn_bonuslen, <=, DN_MAX_BONUSLEN); | |
| 147 ASSERT3U(dn->dn_datablksz, ==, | |
| 148 dn->dn_datablkszsec << SPA_MINBLOCKSHIFT); | |
| 149 ASSERT3U(ISP2(dn->dn_datablksz), ==, dn->dn_datablkshift != 0); | |
| 150 ASSERT3U((dn->dn_nblkptr - 1) * sizeof (blkptr_t) + | |
| 151 dn->dn_bonuslen, <=, DN_MAX_BONUSLEN); | |
| 152 for (i = 0; i < TXG_SIZE; i++) { | |
| 153 ASSERT3U(dn->dn_next_nlevels[i], <=, dn->dn_nlevels); | |
| 154 } | |
| 155 } | |
| 156 if (dn->dn_phys->dn_type != DMU_OT_NONE) | |
| 157 ASSERT3U(dn->dn_phys->dn_nlevels, <=, dn->dn_nlevels); | |
| 1544 | 158 ASSERT(dn->dn_object == DMU_META_DNODE_OBJECT || dn->dn_dbuf != NULL); |
| 789 | 159 if (dn->dn_dbuf != NULL) { |
| 160 ASSERT3P(dn->dn_phys, ==, | |
| 161 (dnode_phys_t *)dn->dn_dbuf->db.db_data + | |
| 162 (dn->dn_object % (dn->dn_dbuf->db.db_size >> DNODE_SHIFT))); | |
| 163 } | |
| 164 if (drop_struct_lock) | |
| 165 rw_exit(&dn->dn_struct_rwlock); | |
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166 } |
| 789 | 167 #endif |
| 168 | |
| 169 void | |
| 170 dnode_byteswap(dnode_phys_t *dnp) | |
| 171 { | |
| 172 uint64_t *buf64 = (void*)&dnp->dn_blkptr; | |
| 173 int i; | |
| 174 | |
| 175 if (dnp->dn_type == DMU_OT_NONE) { | |
| 176 bzero(dnp, sizeof (dnode_phys_t)); | |
| 177 return; | |
| 178 } | |
| 179 | |
| 180 dnp->dn_datablkszsec = BSWAP_16(dnp->dn_datablkszsec); | |
| 181 dnp->dn_bonuslen = BSWAP_16(dnp->dn_bonuslen); | |
| 182 dnp->dn_maxblkid = BSWAP_64(dnp->dn_maxblkid); | |
| 2082 | 183 dnp->dn_used = BSWAP_64(dnp->dn_used); |
| 789 | 184 |
| 185 /* | |
| 186 * dn_nblkptr is only one byte, so it's OK to read it in either | |
| 187 * byte order. We can't read dn_bouslen. | |
| 188 */ | |
| 189 ASSERT(dnp->dn_indblkshift <= SPA_MAXBLOCKSHIFT); | |
| 190 ASSERT(dnp->dn_nblkptr <= DN_MAX_NBLKPTR); | |
| 191 for (i = 0; i < dnp->dn_nblkptr * sizeof (blkptr_t)/8; i++) | |
| 192 buf64[i] = BSWAP_64(buf64[i]); | |
| 193 | |
| 194 /* | |
| 195 * OK to check dn_bonuslen for zero, because it won't matter if | |
| 196 * we have the wrong byte order. This is necessary because the | |
| 197 * dnode dnode is smaller than a regular dnode. | |
| 198 */ | |
| 199 if (dnp->dn_bonuslen != 0) { | |
| 200 /* | |
| 201 * Note that the bonus length calculated here may be | |
| 202 * longer than the actual bonus buffer. This is because | |
| 203 * we always put the bonus buffer after the last block | |
| 204 * pointer (instead of packing it against the end of the | |
| 205 * dnode buffer). | |
| 206 */ | |
| 207 int off = (dnp->dn_nblkptr-1) * sizeof (blkptr_t); | |
| 208 size_t len = DN_MAX_BONUSLEN - off; | |
| 3882 | 209 ASSERT3U(dnp->dn_bonustype, <, DMU_OT_NUMTYPES); |
| 789 | 210 dmu_ot[dnp->dn_bonustype].ot_byteswap(dnp->dn_bonus + off, len); |
| 211 } | |
| 212 } | |
| 213 | |
| 214 void | |
| 215 dnode_buf_byteswap(void *vbuf, size_t size) | |
| 216 { | |
| 217 dnode_phys_t *buf = vbuf; | |
| 218 int i; | |
| 219 | |
| 220 ASSERT3U(sizeof (dnode_phys_t), ==, (1<<DNODE_SHIFT)); | |
| 221 ASSERT((size & (sizeof (dnode_phys_t)-1)) == 0); | |
| 222 | |
| 223 size >>= DNODE_SHIFT; | |
| 224 for (i = 0; i < size; i++) { | |
| 225 dnode_byteswap(buf); | |
| 226 buf++; | |
| 227 } | |
| 228 } | |
| 229 | |
| 230 static int | |
| 231 free_range_compar(const void *node1, const void *node2) | |
| 232 { | |
| 233 const free_range_t *rp1 = node1; | |
| 234 const free_range_t *rp2 = node2; | |
| 235 | |
| 236 if (rp1->fr_blkid < rp2->fr_blkid) | |
| 237 return (-1); | |
| 238 else if (rp1->fr_blkid > rp2->fr_blkid) | |
| 239 return (1); | |
| 240 else return (0); | |
| 241 } | |
| 242 | |
| 243 static void | |
| 244 dnode_setdblksz(dnode_t *dn, int size) | |
| 245 { | |
| 246 ASSERT3U(P2PHASE(size, SPA_MINBLOCKSIZE), ==, 0); | |
| 247 ASSERT3U(size, <=, SPA_MAXBLOCKSIZE); | |
| 248 ASSERT3U(size, >=, SPA_MINBLOCKSIZE); | |
| 249 ASSERT3U(size >> SPA_MINBLOCKSHIFT, <, | |
| 250 1<<(sizeof (dn->dn_phys->dn_datablkszsec) * 8)); | |
| 251 dn->dn_datablksz = size; | |
| 252 dn->dn_datablkszsec = size >> SPA_MINBLOCKSHIFT; | |
| 253 dn->dn_datablkshift = ISP2(size) ? highbit(size - 1) : 0; | |
| 254 } | |
| 255 | |
| 256 static dnode_t * | |
| 257 dnode_create(objset_impl_t *os, dnode_phys_t *dnp, dmu_buf_impl_t *db, | |
| 258 uint64_t object) | |
| 259 { | |
| 260 dnode_t *dn = kmem_cache_alloc(dnode_cache, KM_SLEEP); | |
| 261 (void) dnode_cons(dn, NULL, 0); /* XXX */ | |
| 262 | |
| 263 dn->dn_objset = os; | |
| 264 dn->dn_object = object; | |
| 265 dn->dn_dbuf = db; | |
| 266 dn->dn_phys = dnp; | |
| 267 | |
| 268 if (dnp->dn_datablkszsec) | |
| 269 dnode_setdblksz(dn, dnp->dn_datablkszsec << SPA_MINBLOCKSHIFT); | |
| 270 dn->dn_indblkshift = dnp->dn_indblkshift; | |
| 271 dn->dn_nlevels = dnp->dn_nlevels; | |
| 272 dn->dn_type = dnp->dn_type; | |
| 273 dn->dn_nblkptr = dnp->dn_nblkptr; | |
| 274 dn->dn_checksum = dnp->dn_checksum; | |
| 275 dn->dn_compress = dnp->dn_compress; | |
| 276 dn->dn_bonustype = dnp->dn_bonustype; | |
| 277 dn->dn_bonuslen = dnp->dn_bonuslen; | |
| 278 dn->dn_maxblkid = dnp->dn_maxblkid; | |
| 279 | |
| 280 dmu_zfetch_init(&dn->dn_zfetch, dn); | |
| 281 | |
| 282 ASSERT(dn->dn_phys->dn_type < DMU_OT_NUMTYPES); | |
| 283 mutex_enter(&os->os_lock); | |
| 284 list_insert_head(&os->os_dnodes, dn); | |
| 285 mutex_exit(&os->os_lock); | |
| 286 | |
| 287 return (dn); | |
| 288 } | |
| 289 | |
| 290 static void | |
| 291 dnode_destroy(dnode_t *dn) | |
| 292 { | |
| 293 objset_impl_t *os = dn->dn_objset; | |
| 294 | |
| 2885 | 295 #ifdef ZFS_DEBUG |
| 296 int i; | |
| 297 | |
| 298 for (i = 0; i < TXG_SIZE; i++) { | |
| 299 ASSERT(!list_link_active(&dn->dn_dirty_link[i])); | |
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300 ASSERT(NULL == list_head(&dn->dn_dirty_records[i])); |
| 2885 | 301 ASSERT(0 == avl_numnodes(&dn->dn_ranges[i])); |
| 302 } | |
| 303 ASSERT(NULL == list_head(&dn->dn_dbufs)); | |
| 304 #endif | |
| 305 | |
| 789 | 306 mutex_enter(&os->os_lock); |
| 307 list_remove(&os->os_dnodes, dn); | |
| 308 mutex_exit(&os->os_lock); | |
| 309 | |
| 310 if (dn->dn_dirtyctx_firstset) { | |
| 311 kmem_free(dn->dn_dirtyctx_firstset, 1); | |
| 312 dn->dn_dirtyctx_firstset = NULL; | |
| 313 } | |
| 314 dmu_zfetch_rele(&dn->dn_zfetch); | |
| 1544 | 315 if (dn->dn_bonus) { |
| 316 mutex_enter(&dn->dn_bonus->db_mtx); | |
| 317 dbuf_evict(dn->dn_bonus); | |
| 318 dn->dn_bonus = NULL; | |
| 319 } | |
| 789 | 320 kmem_cache_free(dnode_cache, dn); |
| 321 } | |
| 322 | |
| 323 void | |
| 324 dnode_allocate(dnode_t *dn, dmu_object_type_t ot, int blocksize, int ibs, | |
| 1599 | 325 dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx) |
| 789 | 326 { |
| 327 int i; | |
| 328 | |
| 329 if (blocksize == 0) | |
| 330 blocksize = 1 << zfs_default_bs; | |
| 1402 | 331 else if (blocksize > SPA_MAXBLOCKSIZE) |
| 332 blocksize = SPA_MAXBLOCKSIZE; | |
| 333 else | |
| 334 blocksize = P2ROUNDUP(blocksize, SPA_MINBLOCKSIZE); | |
| 789 | 335 |
| 336 if (ibs == 0) | |
| 337 ibs = zfs_default_ibs; | |
| 338 | |
| 339 ibs = MIN(MAX(ibs, DN_MIN_INDBLKSHIFT), DN_MAX_INDBLKSHIFT); | |
| 340 | |
| 341 dprintf("os=%p obj=%llu txg=%llu blocksize=%d ibs=%d\n", dn->dn_objset, | |
| 342 dn->dn_object, tx->tx_txg, blocksize, ibs); | |
| 343 | |
| 344 ASSERT(dn->dn_type == DMU_OT_NONE); | |
| 345 ASSERT(bcmp(dn->dn_phys, &dnode_phys_zero, sizeof (dnode_phys_t)) == 0); | |
| 346 ASSERT(dn->dn_phys->dn_type == DMU_OT_NONE); | |
| 347 ASSERT(ot != DMU_OT_NONE); | |
| 348 ASSERT3U(ot, <, DMU_OT_NUMTYPES); | |
| 349 ASSERT((bonustype == DMU_OT_NONE && bonuslen == 0) || | |
| 350 (bonustype != DMU_OT_NONE && bonuslen != 0)); | |
| 351 ASSERT3U(bonustype, <, DMU_OT_NUMTYPES); | |
| 352 ASSERT3U(bonuslen, <=, DN_MAX_BONUSLEN); | |
| 353 ASSERT(dn->dn_type == DMU_OT_NONE); | |
| 354 ASSERT3U(dn->dn_maxblkid, ==, 0); | |
| 355 ASSERT3U(dn->dn_allocated_txg, ==, 0); | |
| 356 ASSERT3U(dn->dn_assigned_txg, ==, 0); | |
| 357 ASSERT(refcount_is_zero(&dn->dn_tx_holds)); | |
| 358 ASSERT3U(refcount_count(&dn->dn_holds), <=, 1); | |
| 359 ASSERT3P(list_head(&dn->dn_dbufs), ==, NULL); | |
| 360 | |
| 361 for (i = 0; i < TXG_SIZE; i++) { | |
| 362 ASSERT3U(dn->dn_next_nlevels[i], ==, 0); | |
| 363 ASSERT3U(dn->dn_next_indblkshift[i], ==, 0); | |
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364 ASSERT3U(dn->dn_next_blksz[i], ==, 0); |
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365 ASSERT(!list_link_active(&dn->dn_dirty_link[i])); |
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366 ASSERT3P(list_head(&dn->dn_dirty_records[i]), ==, NULL); |
| 789 | 367 ASSERT3U(avl_numnodes(&dn->dn_ranges[i]), ==, 0); |
| 368 } | |
| 369 | |
| 370 dn->dn_type = ot; | |
| 371 dnode_setdblksz(dn, blocksize); | |
| 372 dn->dn_indblkshift = ibs; | |
| 373 dn->dn_nlevels = 1; | |
| 374 dn->dn_nblkptr = 1 + ((DN_MAX_BONUSLEN - bonuslen) >> SPA_BLKPTRSHIFT); | |
| 375 dn->dn_bonustype = bonustype; | |
| 376 dn->dn_bonuslen = bonuslen; | |
| 377 dn->dn_checksum = ZIO_CHECKSUM_INHERIT; | |
| 378 dn->dn_compress = ZIO_COMPRESS_INHERIT; | |
| 379 dn->dn_dirtyctx = 0; | |
| 380 | |
| 381 dn->dn_free_txg = 0; | |
| 382 if (dn->dn_dirtyctx_firstset) { | |
| 383 kmem_free(dn->dn_dirtyctx_firstset, 1); | |
| 384 dn->dn_dirtyctx_firstset = NULL; | |
| 385 } | |
| 386 | |
| 387 dn->dn_allocated_txg = tx->tx_txg; | |
| 1599 | 388 |
| 789 | 389 dnode_setdirty(dn, tx); |
| 1599 | 390 dn->dn_next_indblkshift[tx->tx_txg & TXG_MASK] = ibs; |
| 391 dn->dn_next_blksz[tx->tx_txg & TXG_MASK] = dn->dn_datablksz; | |
| 789 | 392 } |
| 393 | |
| 394 void | |
| 395 dnode_reallocate(dnode_t *dn, dmu_object_type_t ot, int blocksize, | |
| 396 dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx) | |
| 397 { | |
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398 int i; |
| 3087 | 399 dmu_buf_impl_t *db = NULL; |
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400 |
| 789 | 401 ASSERT3U(blocksize, >=, SPA_MINBLOCKSIZE); |
| 402 ASSERT3U(blocksize, <=, SPA_MAXBLOCKSIZE); | |
| 403 ASSERT3U(blocksize % SPA_MINBLOCKSIZE, ==, 0); | |
| 1544 | 404 ASSERT(dn->dn_object != DMU_META_DNODE_OBJECT || dmu_tx_private_ok(tx)); |
| 789 | 405 ASSERT(tx->tx_txg != 0); |
| 406 ASSERT((bonustype == DMU_OT_NONE && bonuslen == 0) || | |
| 407 (bonustype != DMU_OT_NONE && bonuslen != 0)); | |
| 408 ASSERT3U(bonustype, <, DMU_OT_NUMTYPES); | |
| 409 ASSERT3U(bonuslen, <=, DN_MAX_BONUSLEN); | |
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410 |
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411 for (i = 0; i < TXG_SIZE; i++) |
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6395371 ASSERT in dmu_tx_count_free: blkid + i < dn->dn_phys->dn_nblkptr
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412 ASSERT(!list_link_active(&dn->dn_dirty_link[i])); |
| 789 | 413 |
| 1544 | 414 /* clean up any unreferenced dbufs */ |
|
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415 (void) dnode_evict_dbufs(dn, 0); |
| 1544 | 416 ASSERT3P(list_head(&dn->dn_dbufs), ==, NULL); |
| 417 | |
| 789 | 418 /* |
| 419 * XXX I should really have a generation number to tell if we | |
| 420 * need to do this... | |
| 421 */ | |
| 422 if (blocksize != dn->dn_datablksz || | |
| 423 dn->dn_bonustype != bonustype || dn->dn_bonuslen != bonuslen) { | |
| 424 /* free all old data */ | |
| 425 dnode_free_range(dn, 0, -1ULL, tx); | |
| 426 } | |
| 427 | |
| 428 /* change blocksize */ | |
| 429 rw_enter(&dn->dn_struct_rwlock, RW_WRITER); | |
| 3087 | 430 if (blocksize != dn->dn_datablksz && |
| 431 (!BP_IS_HOLE(&dn->dn_phys->dn_blkptr[0]) || | |
| 432 list_head(&dn->dn_dbufs) != NULL)) { | |
| 433 db = dbuf_hold(dn, 0, FTAG); | |
| 434 dbuf_new_size(db, blocksize, tx); | |
| 435 } | |
| 789 | 436 dnode_setdblksz(dn, blocksize); |
| 437 dnode_setdirty(dn, tx); | |
|
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438 dn->dn_next_blksz[tx->tx_txg&TXG_MASK] = blocksize; |
| 789 | 439 rw_exit(&dn->dn_struct_rwlock); |
| 3087 | 440 if (db) { |
| 441 dbuf_rele(db, FTAG); | |
| 442 db = NULL; | |
| 443 } | |
| 789 | 444 |
| 445 /* change type */ | |
| 446 dn->dn_type = ot; | |
| 447 | |
| 448 if (dn->dn_bonuslen != bonuslen) { | |
| 449 /* change bonus size */ | |
| 450 if (bonuslen == 0) | |
| 451 bonuslen = 1; /* XXX */ | |
| 1544 | 452 rw_enter(&dn->dn_struct_rwlock, RW_WRITER); |
| 453 if (dn->dn_bonus == NULL) | |
| 454 dn->dn_bonus = dbuf_create_bonus(dn); | |
| 455 db = dn->dn_bonus; | |
| 456 rw_exit(&dn->dn_struct_rwlock); | |
| 457 if (refcount_add(&db->db_holds, FTAG) == 1) | |
| 458 dnode_add_ref(dn, db); | |
|
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459 VERIFY(0 == dbuf_read(db, NULL, DB_RF_MUST_SUCCEED)); |
| 789 | 460 mutex_enter(&db->db_mtx); |
| 461 ASSERT3U(db->db.db_size, ==, dn->dn_bonuslen); | |
| 462 ASSERT(db->db.db_data != NULL); | |
| 463 db->db.db_size = bonuslen; | |
| 464 mutex_exit(&db->db_mtx); | |
|
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465 (void) dbuf_dirty(db, tx); |
| 789 | 466 } |
| 467 | |
| 468 /* change bonus size and type */ | |
| 469 mutex_enter(&dn->dn_mtx); | |
| 470 dn->dn_bonustype = bonustype; | |
| 471 dn->dn_bonuslen = bonuslen; | |
| 472 dn->dn_nblkptr = 1 + ((DN_MAX_BONUSLEN - bonuslen) >> SPA_BLKPTRSHIFT); | |
| 473 dn->dn_checksum = ZIO_CHECKSUM_INHERIT; | |
| 474 dn->dn_compress = ZIO_COMPRESS_INHERIT; | |
| 475 ASSERT3U(dn->dn_nblkptr, <=, DN_MAX_NBLKPTR); | |
| 476 | |
| 3087 | 477 /* |
| 478 * NB: we have to do the dbuf_rele after we've changed the | |
| 479 * dn_bonuslen, for the sake of dbuf_verify(). | |
| 480 */ | |
| 481 if (db) | |
| 482 dbuf_rele(db, FTAG); | |
| 483 | |
| 789 | 484 dn->dn_allocated_txg = tx->tx_txg; |
| 485 mutex_exit(&dn->dn_mtx); | |
| 486 } | |
| 487 | |
| 488 void | |
| 489 dnode_special_close(dnode_t *dn) | |
| 490 { | |
| 1544 | 491 /* |
| 492 * Wait for final references to the dnode to clear. This can | |
| 493 * only happen if the arc is asyncronously evicting state that | |
| 494 * has a hold on this dnode while we are trying to evict this | |
| 495 * dnode. | |
| 496 */ | |
| 497 while (refcount_count(&dn->dn_holds) > 0) | |
| 498 delay(1); | |
| 789 | 499 dnode_destroy(dn); |
| 500 } | |
| 501 | |
| 502 dnode_t * | |
| 503 dnode_special_open(objset_impl_t *os, dnode_phys_t *dnp, uint64_t object) | |
| 504 { | |
| 505 dnode_t *dn = dnode_create(os, dnp, NULL, object); | |
|
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506 DNODE_VERIFY(dn); |
| 789 | 507 return (dn); |
| 508 } | |
| 509 | |
| 510 static void | |
| 511 dnode_buf_pageout(dmu_buf_t *db, void *arg) | |
| 512 { | |
| 513 dnode_t **children_dnodes = arg; | |
| 514 int i; | |
| 515 int epb = db->db_size >> DNODE_SHIFT; | |
| 516 | |
| 517 for (i = 0; i < epb; i++) { | |
| 518 dnode_t *dn = children_dnodes[i]; | |
| 519 int n; | |
| 520 | |
| 521 if (dn == NULL) | |
| 522 continue; | |
| 523 #ifdef ZFS_DEBUG | |
| 524 /* | |
| 525 * If there are holds on this dnode, then there should | |
| 526 * be holds on the dnode's containing dbuf as well; thus | |
| 527 * it wouldn't be eligable for eviction and this function | |
| 528 * would not have been called. | |
| 529 */ | |
| 530 ASSERT(refcount_is_zero(&dn->dn_holds)); | |
| 531 ASSERT(list_head(&dn->dn_dbufs) == NULL); | |
| 532 ASSERT(refcount_is_zero(&dn->dn_tx_holds)); | |
| 533 | |
| 534 for (n = 0; n < TXG_SIZE; n++) | |
|
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535 ASSERT(!list_link_active(&dn->dn_dirty_link[n])); |
| 789 | 536 #endif |
| 537 children_dnodes[i] = NULL; | |
| 538 dnode_destroy(dn); | |
| 539 } | |
| 540 kmem_free(children_dnodes, epb * sizeof (dnode_t *)); | |
| 541 } | |
| 542 | |
| 543 /* | |
| 1544 | 544 * errors: |
| 545 * EINVAL - invalid object number. | |
| 546 * EIO - i/o error. | |
| 547 * succeeds even for free dnodes. | |
| 789 | 548 */ |
| 1544 | 549 int |
| 550 dnode_hold_impl(objset_impl_t *os, uint64_t object, int flag, | |
| 551 void *tag, dnode_t **dnp) | |
| 789 | 552 { |
| 1544 | 553 int epb, idx, err; |
| 789 | 554 int drop_struct_lock = FALSE; |
| 1544 | 555 int type; |
| 789 | 556 uint64_t blk; |
| 557 dnode_t *mdn, *dn; | |
| 558 dmu_buf_impl_t *db; | |
| 559 dnode_t **children_dnodes; | |
| 560 | |
| 561 if (object == 0 || object >= DN_MAX_OBJECT) | |
| 1544 | 562 return (EINVAL); |
| 789 | 563 |
| 564 mdn = os->os_meta_dnode; | |
| 565 | |
|
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566 DNODE_VERIFY(mdn); |
| 789 | 567 |
| 568 if (!RW_WRITE_HELD(&mdn->dn_struct_rwlock)) { | |
| 569 rw_enter(&mdn->dn_struct_rwlock, RW_READER); | |
| 570 drop_struct_lock = TRUE; | |
| 571 } | |
| 572 | |
| 573 blk = dbuf_whichblock(mdn, object * sizeof (dnode_phys_t)); | |
| 574 | |
| 1544 | 575 db = dbuf_hold(mdn, blk, FTAG); |
| 789 | 576 if (drop_struct_lock) |
| 577 rw_exit(&mdn->dn_struct_rwlock); | |
| 1544 | 578 if (db == NULL) |
| 579 return (EIO); | |
| 580 err = dbuf_read(db, NULL, DB_RF_CANFAIL); | |
| 581 if (err) { | |
| 582 dbuf_rele(db, FTAG); | |
| 583 return (err); | |
| 584 } | |
| 789 | 585 |
| 586 ASSERT3U(db->db.db_size, >=, 1<<DNODE_SHIFT); | |
| 587 epb = db->db.db_size >> DNODE_SHIFT; | |
| 588 | |
| 589 idx = object & (epb-1); | |
| 590 | |
| 591 children_dnodes = dmu_buf_get_user(&db->db); | |
| 592 if (children_dnodes == NULL) { | |
| 593 dnode_t **winner; | |
| 594 children_dnodes = kmem_zalloc(epb * sizeof (dnode_t *), | |
| 595 KM_SLEEP); | |
| 596 if (winner = dmu_buf_set_user(&db->db, children_dnodes, NULL, | |
| 597 dnode_buf_pageout)) { | |
| 598 kmem_free(children_dnodes, epb * sizeof (dnode_t *)); | |
| 599 children_dnodes = winner; | |
| 600 } | |
| 601 } | |
| 602 | |
| 603 if ((dn = children_dnodes[idx]) == NULL) { | |
| 604 dnode_t *winner; | |
| 605 dn = dnode_create(os, (dnode_phys_t *)db->db.db_data+idx, | |
| 606 db, object); | |
| 607 winner = atomic_cas_ptr(&children_dnodes[idx], NULL, dn); | |
| 608 if (winner != NULL) { | |
| 609 dnode_destroy(dn); | |
| 610 dn = winner; | |
| 611 } | |
| 612 } | |
| 613 | |
| 614 mutex_enter(&dn->dn_mtx); | |
| 1544 | 615 type = dn->dn_type; |
| 789 | 616 if (dn->dn_free_txg || |
| 1544 | 617 ((flag & DNODE_MUST_BE_ALLOCATED) && type == DMU_OT_NONE) || |
| 618 ((flag & DNODE_MUST_BE_FREE) && type != DMU_OT_NONE)) { | |
| 789 | 619 mutex_exit(&dn->dn_mtx); |
| 1544 | 620 dbuf_rele(db, FTAG); |
| 621 return (type == DMU_OT_NONE ? ENOENT : EEXIST); | |
| 789 | 622 } |
| 623 mutex_exit(&dn->dn_mtx); | |
| 624 | |
| 1544 | 625 if (refcount_add(&dn->dn_holds, tag) == 1) |
| 789 | 626 dbuf_add_ref(db, dn); |
| 627 | |
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628 DNODE_VERIFY(dn); |
| 789 | 629 ASSERT3P(dn->dn_dbuf, ==, db); |
| 630 ASSERT3U(dn->dn_object, ==, object); | |
| 1544 | 631 dbuf_rele(db, FTAG); |
| 789 | 632 |
| 1544 | 633 *dnp = dn; |
| 634 return (0); | |
| 789 | 635 } |
| 636 | |
| 637 /* | |
| 638 * Return held dnode if the object is allocated, NULL if not. | |
| 639 */ | |
| 1544 | 640 int |
| 641 dnode_hold(objset_impl_t *os, uint64_t object, void *tag, dnode_t **dnp) | |
| 789 | 642 { |
| 1544 | 643 return (dnode_hold_impl(os, object, DNODE_MUST_BE_ALLOCATED, tag, dnp)); |
| 789 | 644 } |
| 645 | |
| 646 void | |
| 1544 | 647 dnode_add_ref(dnode_t *dn, void *tag) |
| 789 | 648 { |
| 649 ASSERT(refcount_count(&dn->dn_holds) > 0); | |
| 1544 | 650 (void) refcount_add(&dn->dn_holds, tag); |
| 789 | 651 } |
| 652 | |
| 653 void | |
| 1544 | 654 dnode_rele(dnode_t *dn, void *tag) |
| 789 | 655 { |
| 656 uint64_t refs; | |
| 657 | |
| 1544 | 658 refs = refcount_remove(&dn->dn_holds, tag); |
| 789 | 659 /* NOTE: the DNODE_DNODE does not have a dn_dbuf */ |
| 660 if (refs == 0 && dn->dn_dbuf) | |
| 1544 | 661 dbuf_rele(dn->dn_dbuf, dn); |
| 789 | 662 } |
| 663 | |
| 664 void | |
| 665 dnode_setdirty(dnode_t *dn, dmu_tx_t *tx) | |
| 666 { | |
| 667 objset_impl_t *os = dn->dn_objset; | |
| 668 uint64_t txg = tx->tx_txg; | |
| 669 | |
| 1544 | 670 if (dn->dn_object == DMU_META_DNODE_OBJECT) |
| 789 | 671 return; |
| 672 | |
|
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673 DNODE_VERIFY(dn); |
| 789 | 674 |
| 675 #ifdef ZFS_DEBUG | |
| 676 mutex_enter(&dn->dn_mtx); | |
| 677 ASSERT(dn->dn_phys->dn_type || dn->dn_allocated_txg); | |
| 678 /* ASSERT(dn->dn_free_txg == 0 || dn->dn_free_txg >= txg); */ | |
| 679 mutex_exit(&dn->dn_mtx); | |
| 680 #endif | |
| 681 | |
| 682 mutex_enter(&os->os_lock); | |
| 683 | |
| 684 /* | |
| 685 * If we are already marked dirty, we're done. | |
| 686 */ | |
|
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687 if (list_link_active(&dn->dn_dirty_link[txg & TXG_MASK])) { |
| 789 | 688 mutex_exit(&os->os_lock); |
| 689 return; | |
| 690 } | |
| 691 | |
| 692 ASSERT(!refcount_is_zero(&dn->dn_holds) || list_head(&dn->dn_dbufs)); | |
| 693 ASSERT(dn->dn_datablksz != 0); | |
| 1599 | 694 ASSERT3U(dn->dn_next_blksz[txg&TXG_MASK], ==, 0); |
| 789 | 695 |
| 696 dprintf_ds(os->os_dsl_dataset, "obj=%llu txg=%llu\n", | |
| 697 dn->dn_object, txg); | |
| 698 | |
| 699 if (dn->dn_free_txg > 0 && dn->dn_free_txg <= txg) { | |
| 700 list_insert_tail(&os->os_free_dnodes[txg&TXG_MASK], dn); | |
| 701 } else { | |
| 702 list_insert_tail(&os->os_dirty_dnodes[txg&TXG_MASK], dn); | |
| 703 } | |
| 704 | |
| 705 mutex_exit(&os->os_lock); | |
| 706 | |
| 707 /* | |
| 708 * The dnode maintains a hold on its containing dbuf as | |
| 709 * long as there are holds on it. Each instantiated child | |
| 710 * dbuf maintaines a hold on the dnode. When the last child | |
| 711 * drops its hold, the dnode will drop its hold on the | |
| 712 * containing dbuf. We add a "dirty hold" here so that the | |
| 713 * dnode will hang around after we finish processing its | |
| 714 * children. | |
| 715 */ | |
| 1544 | 716 dnode_add_ref(dn, (void *)(uintptr_t)tx->tx_txg); |
| 789 | 717 |
|
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718 (void) dbuf_dirty(dn->dn_dbuf, tx); |
| 789 | 719 |
| 720 dsl_dataset_dirty(os->os_dsl_dataset, tx); | |
| 721 } | |
| 722 | |
| 723 void | |
| 724 dnode_free(dnode_t *dn, dmu_tx_t *tx) | |
| 725 { | |
|
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726 int txgoff = tx->tx_txg & TXG_MASK; |
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6395371 ASSERT in dmu_tx_count_free: blkid + i < dn->dn_phys->dn_nblkptr
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727 |
| 789 | 728 dprintf("dn=%p txg=%llu\n", dn, tx->tx_txg); |
| 729 | |
| 730 /* we should be the only holder... hopefully */ | |
| 731 /* ASSERT3U(refcount_count(&dn->dn_holds), ==, 1); */ | |
| 732 | |
| 733 mutex_enter(&dn->dn_mtx); | |
| 734 if (dn->dn_type == DMU_OT_NONE || dn->dn_free_txg) { | |
| 735 mutex_exit(&dn->dn_mtx); | |
| 736 return; | |
| 737 } | |
| 738 dn->dn_free_txg = tx->tx_txg; | |
| 739 mutex_exit(&dn->dn_mtx); | |
| 740 | |
| 741 /* | |
| 742 * If the dnode is already dirty, it needs to be moved from | |
| 743 * the dirty list to the free list. | |
| 744 */ | |
| 745 mutex_enter(&dn->dn_objset->os_lock); | |
|
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6395371 ASSERT in dmu_tx_count_free: blkid + i < dn->dn_phys->dn_nblkptr
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746 if (list_link_active(&dn->dn_dirty_link[txgoff])) { |
|
2e2377ccbf85
6395371 ASSERT in dmu_tx_count_free: blkid + i < dn->dn_phys->dn_nblkptr
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747 list_remove(&dn->dn_objset->os_dirty_dnodes[txgoff], dn); |
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2e2377ccbf85
6395371 ASSERT in dmu_tx_count_free: blkid + i < dn->dn_phys->dn_nblkptr
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748 list_insert_tail(&dn->dn_objset->os_free_dnodes[txgoff], dn); |
| 789 | 749 mutex_exit(&dn->dn_objset->os_lock); |
| 750 } else { | |
| 751 mutex_exit(&dn->dn_objset->os_lock); | |
| 752 dnode_setdirty(dn, tx); | |
| 753 } | |
| 754 } | |
| 755 | |
| 756 /* | |
| 757 * Try to change the block size for the indicated dnode. This can only | |
| 758 * succeed if there are no blocks allocated or dirty beyond first block | |
| 759 */ | |
| 760 int | |
| 761 dnode_set_blksz(dnode_t *dn, uint64_t size, int ibs, dmu_tx_t *tx) | |
| 762 { | |
| 763 dmu_buf_impl_t *db, *db_next; | |
| 764 int have_db0 = FALSE; | |
| 765 | |
| 766 if (size == 0) | |
| 767 size = SPA_MINBLOCKSIZE; | |
| 768 if (size > SPA_MAXBLOCKSIZE) | |
| 769 size = SPA_MAXBLOCKSIZE; | |
| 770 else | |
| 771 size = P2ROUNDUP(size, SPA_MINBLOCKSIZE); | |
| 772 | |
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773 if (ibs == dn->dn_indblkshift) |
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774 ibs = 0; |
| 789 | 775 |
|
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776 if (size >> SPA_MINBLOCKSHIFT == dn->dn_datablkszsec && ibs == 0) |
| 789 | 777 return (0); |
| 778 | |
| 779 rw_enter(&dn->dn_struct_rwlock, RW_WRITER); | |
| 780 | |
| 781 /* Check for any allocated blocks beyond the first */ | |
| 782 if (dn->dn_phys->dn_maxblkid != 0) | |
|
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783 goto fail; |
| 789 | 784 |
| 785 mutex_enter(&dn->dn_dbufs_mtx); | |
| 786 for (db = list_head(&dn->dn_dbufs); db; db = db_next) { | |
| 787 db_next = list_next(&dn->dn_dbufs, db); | |
| 788 | |
| 789 if (db->db_blkid == 0) { | |
| 790 have_db0 = TRUE; | |
| 791 } else if (db->db_blkid != DB_BONUS_BLKID) { | |
| 792 mutex_exit(&dn->dn_dbufs_mtx); | |
|
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793 goto fail; |
| 789 | 794 } |
| 795 } | |
| 796 mutex_exit(&dn->dn_dbufs_mtx); | |
| 797 | |
|
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798 if (ibs && dn->dn_nlevels != 1) |
|
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799 goto fail; |
|
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6447381 dnode_free_range() does not handle non-power-of-two blocksizes correctly
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|
800 |
|
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801 db = NULL; |
|
2e2377ccbf85
6395371 ASSERT in dmu_tx_count_free: blkid + i < dn->dn_phys->dn_nblkptr
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802 if (!BP_IS_HOLE(&dn->dn_phys->dn_blkptr[0]) || have_db0) { |
|
2e2377ccbf85
6395371 ASSERT in dmu_tx_count_free: blkid + i < dn->dn_phys->dn_nblkptr
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803 /* obtain the old block */ |
|
2e2377ccbf85
6395371 ASSERT in dmu_tx_count_free: blkid + i < dn->dn_phys->dn_nblkptr
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804 db = dbuf_hold(dn, 0, FTAG); |
|
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|
805 dbuf_new_size(db, size, tx); |
| 789 | 806 } |
| 807 | |
| 808 dnode_setdblksz(dn, size); | |
|
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809 dnode_setdirty(dn, tx); |
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810 dn->dn_next_blksz[tx->tx_txg&TXG_MASK] = size; |
|
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811 if (ibs) { |
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812 dn->dn_indblkshift = ibs; |
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813 dn->dn_next_indblkshift[tx->tx_txg&TXG_MASK] = ibs; |
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814 } |
|
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815 |
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816 if (db) |
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817 dbuf_rele(db, FTAG); |
| 789 | 818 |
| 819 rw_exit(&dn->dn_struct_rwlock); | |
|
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820 return (0); |
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821 |
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822 fail: |
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823 rw_exit(&dn->dn_struct_rwlock); |
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824 return (ENOTSUP); |
| 789 | 825 } |
| 826 | |
| 827 void | |
| 828 dnode_new_blkid(dnode_t *dn, uint64_t blkid, dmu_tx_t *tx) | |
| 829 { | |
| 830 uint64_t txgoff = tx->tx_txg & TXG_MASK; | |
| 831 int drop_struct_lock = FALSE; | |
|
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832 int epbs, new_nlevels; |
| 789 | 833 uint64_t sz; |
| 834 | |
|
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835 ASSERT(blkid != DB_BONUS_BLKID); |
| 789 | 836 |
| 837 if (!RW_WRITE_HELD(&dn->dn_struct_rwlock)) { | |
| 838 rw_enter(&dn->dn_struct_rwlock, RW_WRITER); | |
| 839 drop_struct_lock = TRUE; | |
| 840 } | |
| 841 | |
|
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842 if (blkid <= dn->dn_maxblkid) |
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843 goto out; |
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844 |
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845 dn->dn_maxblkid = blkid; |
| 789 | 846 |
| 847 /* | |
|
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848 * Compute the number of levels necessary to support the new maxblkid. |
| 789 | 849 */ |
| 850 new_nlevels = 1; | |
| 851 epbs = dn->dn_indblkshift - SPA_BLKPTRSHIFT; | |
|
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852 for (sz = dn->dn_nblkptr; |
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853 sz <= blkid && sz >= dn->dn_nblkptr; sz <<= epbs) |
| 789 | 854 new_nlevels++; |
| 855 | |
|
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856 if (new_nlevels > dn->dn_nlevels) { |
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857 int old_nlevels = dn->dn_nlevels; |
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858 dmu_buf_impl_t *db; |
|
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859 list_t *list; |
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860 dbuf_dirty_record_t *new, *dr, *dr_next; |
|
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861 |
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862 dn->dn_nlevels = new_nlevels; |
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863 |
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864 ASSERT3U(new_nlevels, >, dn->dn_next_nlevels[txgoff]); |
| 789 | 865 dn->dn_next_nlevels[txgoff] = new_nlevels; |
| 866 | |
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867 /* dirty the left indirects */ |
|
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868 db = dbuf_hold_level(dn, old_nlevels, 0, FTAG); |
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869 new = dbuf_dirty(db, tx); |
| 1544 | 870 dbuf_rele(db, FTAG); |
|
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871 |
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872 /* transfer the dirty records to the new indirect */ |
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873 mutex_enter(&dn->dn_mtx); |
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874 mutex_enter(&new->dt.di.dr_mtx); |
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875 list = &dn->dn_dirty_records[txgoff]; |
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876 for (dr = list_head(list); dr; dr = dr_next) { |
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877 dr_next = list_next(&dn->dn_dirty_records[txgoff], dr); |
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878 if (dr->dr_dbuf->db_level != new_nlevels-1 && |
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879 dr->dr_dbuf->db_blkid != DB_BONUS_BLKID) { |
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880 ASSERT(dr->dr_dbuf->db_level == old_nlevels-1); |
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881 list_remove(&dn->dn_dirty_records[txgoff], dr); |
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882 list_insert_tail(&new->dt.di.dr_children, dr); |
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883 dr->dr_parent = new; |
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884 } |
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885 } |
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886 mutex_exit(&new->dt.di.dr_mtx); |
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|
887 mutex_exit(&dn->dn_mtx); |
| 789 | 888 } |
| 889 | |
| 890 out: | |
| 891 if (drop_struct_lock) | |
| 892 rw_exit(&dn->dn_struct_rwlock); | |
| 893 } | |
| 894 | |
| 895 void | |
| 896 dnode_clear_range(dnode_t *dn, uint64_t blkid, uint64_t nblks, dmu_tx_t *tx) | |
| 897 { | |
| 898 avl_tree_t *tree = &dn->dn_ranges[tx->tx_txg&TXG_MASK]; | |
| 899 avl_index_t where; | |
| 900 free_range_t *rp; | |
| 901 free_range_t rp_tofind; | |
| 902 uint64_t endblk = blkid + nblks; | |
| 903 | |
| 904 ASSERT(MUTEX_HELD(&dn->dn_mtx)); | |
| 905 ASSERT(nblks <= UINT64_MAX - blkid); /* no overflow */ | |
| 906 | |
| 907 dprintf_dnode(dn, "blkid=%llu nblks=%llu txg=%llu\n", | |
| 908 blkid, nblks, tx->tx_txg); | |
| 909 rp_tofind.fr_blkid = blkid; | |
| 910 rp = avl_find(tree, &rp_tofind, &where); | |
| 911 if (rp == NULL) | |
| 912 rp = avl_nearest(tree, where, AVL_BEFORE); | |
| 913 if (rp == NULL) | |
| 914 rp = avl_nearest(tree, where, AVL_AFTER); | |
| 915 | |
| 916 while (rp && (rp->fr_blkid <= blkid + nblks)) { | |
| 917 uint64_t fr_endblk = rp->fr_blkid + rp->fr_nblks; | |
| 918 free_range_t *nrp = AVL_NEXT(tree, rp); | |
| 919 | |
| 920 if (blkid <= rp->fr_blkid && endblk >= fr_endblk) { | |
| 921 /* clear this entire range */ | |
| 922 avl_remove(tree, rp); | |
| 923 kmem_free(rp, sizeof (free_range_t)); | |
| 924 } else if (blkid <= rp->fr_blkid && | |
| 925 endblk > rp->fr_blkid && endblk < fr_endblk) { | |
| 926 /* clear the beginning of this range */ | |
| 927 rp->fr_blkid = endblk; | |
| 928 rp->fr_nblks = fr_endblk - endblk; | |
| 929 } else if (blkid > rp->fr_blkid && blkid < fr_endblk && | |
| 930 endblk >= fr_endblk) { | |
| 931 /* clear the end of this range */ | |
| 932 rp->fr_nblks = blkid - rp->fr_blkid; | |
| 933 } else if (blkid > rp->fr_blkid && endblk < fr_endblk) { | |
| 934 /* clear a chunk out of this range */ | |
| 935 free_range_t *new_rp = | |
| 936 kmem_alloc(sizeof (free_range_t), KM_SLEEP); | |
| 937 | |
| 938 new_rp->fr_blkid = endblk; | |
| 939 new_rp->fr_nblks = fr_endblk - endblk; | |
| 940 avl_insert_here(tree, new_rp, rp, AVL_AFTER); | |
| 941 rp->fr_nblks = blkid - rp->fr_blkid; | |
| 942 } | |
| 943 /* there may be no overlap */ | |
| 944 rp = nrp; | |
| 945 } | |
| 946 } | |
| 947 | |
| 948 void | |
| 949 dnode_free_range(dnode_t *dn, uint64_t off, uint64_t len, dmu_tx_t *tx) | |
| 950 { | |
| 951 dmu_buf_impl_t *db; | |
|
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952 uint64_t blkoff, blkid, nblks; |
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953 int blksz, head; |
| 789 | 954 int trunc = FALSE; |
| 955 | |
| 956 rw_enter(&dn->dn_struct_rwlock, RW_WRITER); | |
| 957 blksz = dn->dn_datablksz; | |
| 958 | |
| 959 /* If the range is past the end of the file, this is a no-op */ | |
|
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960 if (off >= blksz * (dn->dn_maxblkid+1)) |
| 789 | 961 goto out; |
| 962 if (len == -1ULL) { | |
| 963 len = UINT64_MAX - off; | |
| 964 trunc = TRUE; | |
| 965 } | |
| 966 | |
| 967 /* | |
| 968 * First, block align the region to free: | |
| 969 */ | |
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970 if (ISP2(blksz)) { |
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971 head = P2NPHASE(off, blksz); |
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972 blkoff = P2PHASE(off, blksz); |
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973 } else { |
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974 ASSERT(dn->dn_maxblkid == 0); |
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975 if (off == 0 && len >= blksz) { |
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976 /* Freeing the whole block; don't do any head. */ |
| 789 | 977 head = 0; |
| 978 } else { | |
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979 /* Freeing part of the block. */ |
| 789 | 980 head = blksz - off; |
| 981 ASSERT3U(head, >, 0); | |
| 982 } | |
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983 blkoff = off; |
| 789 | 984 } |
| 985 /* zero out any partial block data at the start of the range */ | |
| 986 if (head) { | |
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987 ASSERT3U(blkoff + head, ==, blksz); |
| 789 | 988 if (len < head) |
| 989 head = len; | |
| 990 if (dbuf_hold_impl(dn, 0, dbuf_whichblock(dn, off), TRUE, | |
| 991 FTAG, &db) == 0) { | |
| 992 caddr_t data; | |
| 993 | |
| 994 /* don't dirty if it isn't on disk and isn't dirty */ | |
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995 if (db->db_last_dirty || |
| 789 | 996 (db->db_blkptr && !BP_IS_HOLE(db->db_blkptr))) { |
| 997 rw_exit(&dn->dn_struct_rwlock); | |
| 998 dbuf_will_dirty(db, tx); | |
| 999 rw_enter(&dn->dn_struct_rwlock, RW_WRITER); | |
| 1000 data = db->db.db_data; | |
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1001 bzero(data + blkoff, head); |
| 789 | 1002 } |
| 1544 | 1003 dbuf_rele(db, FTAG); |
| 789 | 1004 } |
| 1005 off += head; | |
| 1006 len -= head; | |
| 1007 } | |
| 1008 | |
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1009 /* If the range was less than one block, we're done */ |
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1010 if (len == 0 || off >= blksz * (dn->dn_maxblkid+1)) |
| 789 | 1011 goto out; |
| 1012 | |
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1013 if (!ISP2(blksz)) { |
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1014 /* |
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1015 * They are freeing the whole block of a |
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1016 * non-power-of-two blocksize file. Skip all the messy |
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1017 * math. |
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1018 */ |
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1019 ASSERT3U(off, ==, 0); |
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1020 ASSERT3U(len, >=, blksz); |
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1021 blkid = 0; |
|
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1022 nblks = 1; |
|
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|
1023 } else { |
|
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|
1024 int tail; |
|
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|
1025 int epbs = dn->dn_indblkshift - SPA_BLKPTRSHIFT; |
|
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|
1026 int blkshift = dn->dn_datablkshift; |
|
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|
1027 |
|
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|
1028 /* If the remaining range is past end of file, we're done */ |
|
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1029 if (off > dn->dn_maxblkid << blkshift) |
|
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|
1030 goto out; |
|
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|
1031 |
|
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|
1032 if (off + len == UINT64_MAX) |
|
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|
1033 tail = 0; |
|
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|
1034 else |
|
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|
1035 tail = P2PHASE(len, blksz); |
| 789 | 1036 |
|
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|
1037 ASSERT3U(P2PHASE(off, blksz), ==, 0); |
|
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1038 /* zero out any partial block data at the end of the range */ |
|
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|
1039 if (tail) { |
|
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|
1040 if (len < tail) |
|
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1041 tail = len; |
|
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1042 if (dbuf_hold_impl(dn, 0, dbuf_whichblock(dn, off+len), |
|
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1043 TRUE, FTAG, &db) == 0) { |
|
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1044 /* don't dirty if not on disk and not dirty */ |
|
3547
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6512391 DMU should leverage ZIO dependencies to achieve greater parallelism
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1045 if (db->db_last_dirty || |
|
2445
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1046 (db->db_blkptr && |
|
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1047 !BP_IS_HOLE(db->db_blkptr))) { |
|
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1048 rw_exit(&dn->dn_struct_rwlock); |
|
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1049 dbuf_will_dirty(db, tx); |
|
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1050 rw_enter(&dn->dn_struct_rwlock, |
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1051 RW_WRITER); |
|
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1052 bzero(db->db.db_data, tail); |
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1053 } |
|
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1054 dbuf_rele(db, FTAG); |
| 789 | 1055 } |
|
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1056 len -= tail; |
|
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|
1057 } |
|
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|
1058 /* If the range did not include a full block, we are done */ |
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1059 if (len == 0) |
|
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|
1060 goto out; |
|
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|
1061 |
|
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|
1062 /* dirty the left indirects */ |
|
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1063 if (dn->dn_nlevels > 1 && off != 0) { |
|
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1064 db = dbuf_hold_level(dn, 1, |
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1065 (off - head) >> (blkshift + epbs), FTAG); |
|
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|
1066 dbuf_will_dirty(db, tx); |
| 1544 | 1067 dbuf_rele(db, FTAG); |
| 789 | 1068 } |
| 1069 | |
|
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1070 /* dirty the right indirects */ |
|
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1071 if (dn->dn_nlevels > 1 && !trunc) { |
|
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1072 db = dbuf_hold_level(dn, 1, |
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1073 (off + len + tail - 1) >> (blkshift + epbs), FTAG); |
|
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1074 dbuf_will_dirty(db, tx); |
|
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1075 dbuf_rele(db, FTAG); |
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|
1076 } |
| 789 | 1077 |
|
2445
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|
1078 /* |
|
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|
1079 * Finally, add this range to the dnode range list, we |
|
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|
1080 * will finish up this free operation in the syncing phase. |
|
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|
1081 */ |
|
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|
1082 ASSERT(IS_P2ALIGNED(off, 1<<blkshift)); |
|
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|
1083 ASSERT(off + len == UINT64_MAX || |
|
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|
1084 IS_P2ALIGNED(len, 1<<blkshift)); |
|
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|
1085 blkid = off >> blkshift; |
|
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|
1086 nblks = len >> blkshift; |
| 789 | 1087 |
|
2445
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changeset
|
1088 if (trunc) |
|
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|
1089 dn->dn_maxblkid = (blkid ? blkid - 1 : 0); |
|
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|
1090 } |
| 789 | 1091 |
| 1092 mutex_enter(&dn->dn_mtx); | |
| 1093 dnode_clear_range(dn, blkid, nblks, tx); | |
| 1094 { | |
| 1095 free_range_t *rp, *found; | |
| 1096 avl_index_t where; | |
| 1097 avl_tree_t *tree = &dn->dn_ranges[tx->tx_txg&TXG_MASK]; | |
| 1098 | |
| 1099 /* Add new range to dn_ranges */ | |
| 1100 rp = kmem_alloc(sizeof (free_range_t), KM_SLEEP); | |
| 1101 rp->fr_blkid = blkid; | |
| 1102 rp->fr_nblks = nblks; | |
| 1103 found = avl_find(tree, rp, &where); | |
| 1104 ASSERT(found == NULL); | |
| 1105 avl_insert(tree, rp, where); | |
| 1106 dprintf_dnode(dn, "blkid=%llu nblks=%llu txg=%llu\n", | |
| 1107 blkid, nblks, tx->tx_txg); | |
| 1108 } | |
| 1109 mutex_exit(&dn->dn_mtx); | |
| 1110 | |
| 1111 dbuf_free_range(dn, blkid, nblks, tx); | |
| 1112 dnode_setdirty(dn, tx); | |
| 1113 out: | |
| 1114 rw_exit(&dn->dn_struct_rwlock); | |
| 1115 } | |
| 1116 | |
| 1117 /* return TRUE if this blkid was freed in a recent txg, or FALSE if it wasn't */ | |
| 1118 uint64_t | |
| 1119 dnode_block_freed(dnode_t *dn, uint64_t blkid) | |
| 1120 { | |
| 1121 free_range_t range_tofind; | |
| 1122 void *dp = spa_get_dsl(dn->dn_objset->os_spa); | |
| 1123 int i; | |
| 1124 | |
| 1125 if (blkid == DB_BONUS_BLKID) | |
| 1126 return (FALSE); | |
| 1127 | |
| 1128 /* | |
| 1129 * If we're in the process of opening the pool, dp will not be | |
| 1130 * set yet, but there shouldn't be anything dirty. | |
| 1131 */ | |
| 1132 if (dp == NULL) | |
| 1133 return (FALSE); | |
| 1134 | |
| 1135 if (dn->dn_free_txg) | |
| 1136 return (TRUE); | |
| 1137 | |
| 1138 /* | |
| 1139 * If dn_datablkshift is not set, then there's only a single | |
| 1140 * block, in which case there will never be a free range so it | |
| 1141 * won't matter. | |
| 1142 */ | |
| 1143 range_tofind.fr_blkid = blkid; | |
| 1144 mutex_enter(&dn->dn_mtx); | |
| 1145 for (i = 0; i < TXG_SIZE; i++) { | |
| 1146 free_range_t *range_found; | |
| 1147 avl_index_t idx; | |
| 1148 | |
| 1149 range_found = avl_find(&dn->dn_ranges[i], &range_tofind, &idx); | |
| 1150 if (range_found) { | |
| 1151 ASSERT(range_found->fr_nblks > 0); | |
| 1152 break; | |
| 1153 } | |
| 1154 range_found = avl_nearest(&dn->dn_ranges[i], idx, AVL_BEFORE); | |
| 1155 if (range_found && | |
| 1156 range_found->fr_blkid + range_found->fr_nblks > blkid) | |
| 1157 break; | |
| 1158 } | |
| 1159 mutex_exit(&dn->dn_mtx); | |
| 1160 return (i < TXG_SIZE); | |
| 1161 } | |
| 1162 | |
| 1163 /* call from syncing context when we actually write/free space for this dnode */ | |
| 1164 void | |
| 2082 | 1165 dnode_diduse_space(dnode_t *dn, int64_t delta) |
| 789 | 1166 { |
| 2082 | 1167 uint64_t space; |
| 1168 dprintf_dnode(dn, "dn=%p dnp=%p used=%llu delta=%lld\n", | |
| 789 | 1169 dn, dn->dn_phys, |
| 2082 | 1170 (u_longlong_t)dn->dn_phys->dn_used, |
| 1171 (longlong_t)delta); | |
| 789 | 1172 |
| 1173 mutex_enter(&dn->dn_mtx); | |
| 2082 | 1174 space = DN_USED_BYTES(dn->dn_phys); |
| 1175 if (delta > 0) { | |
| 1176 ASSERT3U(space + delta, >=, space); /* no overflow */ | |
| 789 | 1177 } else { |
| 2082 | 1178 ASSERT3U(space, >=, -delta); /* no underflow */ |
| 1179 } | |
| 1180 space += delta; | |
| 1181 if (spa_version(dn->dn_objset->os_spa) < ZFS_VERSION_DNODE_BYTES) { | |
| 1182 ASSERT((dn->dn_phys->dn_flags & DNODE_FLAG_USED_BYTES) == 0); | |
| 1183 ASSERT3U(P2PHASE(space, 1<<DEV_BSHIFT), ==, 0); | |
| 1184 dn->dn_phys->dn_used = space >> DEV_BSHIFT; | |
| 1185 } else { | |
| 1186 dn->dn_phys->dn_used = space; | |
| 1187 dn->dn_phys->dn_flags |= DNODE_FLAG_USED_BYTES; | |
| 789 | 1188 } |
| 1189 mutex_exit(&dn->dn_mtx); | |
| 1190 } | |
| 1191 | |
| 1192 /* | |
| 1193 * Call when we think we're going to write/free space in open context. | |
| 1194 * Be conservative (ie. OK to write less than this or free more than | |
| 1195 * this, but don't write more or free less). | |
| 1196 */ | |
| 1197 void | |
| 1198 dnode_willuse_space(dnode_t *dn, int64_t space, dmu_tx_t *tx) | |
| 1199 { | |
| 1200 objset_impl_t *os = dn->dn_objset; | |
| 1201 dsl_dataset_t *ds = os->os_dsl_dataset; | |
| 1202 | |
| 1203 if (space > 0) | |
| 1204 space = spa_get_asize(os->os_spa, space); | |
| 1205 | |
| 1206 if (ds) | |
| 1207 dsl_dir_willuse_space(ds->ds_dir, space, tx); | |
| 1208 | |
| 1209 dmu_tx_willuse_space(tx, space); | |
| 1210 } | |
| 1211 | |
| 1212 static int | |
| 1213 dnode_next_offset_level(dnode_t *dn, boolean_t hole, uint64_t *offset, | |
|
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1214 int lvl, uint64_t blkfill, uint64_t txg) |
| 789 | 1215 { |
| 1216 dmu_buf_impl_t *db = NULL; | |
| 1217 void *data = NULL; | |
| 1218 uint64_t epbs = dn->dn_phys->dn_indblkshift - SPA_BLKPTRSHIFT; | |
| 1219 uint64_t epb = 1ULL << epbs; | |
| 1220 uint64_t minfill, maxfill; | |
| 1221 int i, error, span; | |
| 1222 | |
| 1223 dprintf("probing object %llu offset %llx level %d of %u\n", | |
| 1224 dn->dn_object, *offset, lvl, dn->dn_phys->dn_nlevels); | |
| 1225 | |
| 1226 if (lvl == dn->dn_phys->dn_nlevels) { | |
| 1227 error = 0; | |
| 1228 epb = dn->dn_phys->dn_nblkptr; | |
| 1229 data = dn->dn_phys->dn_blkptr; | |
| 1230 } else { | |
| 1231 uint64_t blkid = dbuf_whichblock(dn, *offset) >> (epbs * lvl); | |
| 1232 error = dbuf_hold_impl(dn, lvl, blkid, TRUE, FTAG, &db); | |
| 1233 if (error) { | |
| 1234 if (error == ENOENT) | |
| 1235 return (hole ? 0 : ESRCH); | |
| 1236 return (error); | |
| 1237 } | |
|
1793
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|
1238 error = dbuf_read(db, NULL, DB_RF_CANFAIL | DB_RF_HAVESTRUCT); |
|
d371fba21a3e
6407444 unhandled i/o error from dnode_next_offset_level()
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|
1239 if (error) { |
|
d371fba21a3e
6407444 unhandled i/o error from dnode_next_offset_level()
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diff
changeset
|
1240 dbuf_rele(db, FTAG); |
|
d371fba21a3e
6407444 unhandled i/o error from dnode_next_offset_level()
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changeset
|
1241 return (error); |
|
d371fba21a3e
6407444 unhandled i/o error from dnode_next_offset_level()
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changeset
|
1242 } |
| 789 | 1243 data = db->db.db_data; |
| 1244 } | |
| 1245 | |
|
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|
1246 if (db && txg && |
|
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|
1247 (db->db_blkptr == NULL || db->db_blkptr->blk_birth <= txg)) { |
|
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|
1248 error = ESRCH; |
|
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|
1249 } else if (lvl == 0) { |
| 789 | 1250 dnode_phys_t *dnp = data; |
| 1251 span = DNODE_SHIFT; | |
| 1252 ASSERT(dn->dn_type == DMU_OT_DNODE); | |
| 1253 | |
| 1254 for (i = (*offset >> span) & (blkfill - 1); i < blkfill; i++) { | |
|
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changeset
|
1255 boolean_t newcontents = B_TRUE; |
|
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changeset
|
1256 if (txg) { |
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1257 int j; |
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1258 newcontents = B_FALSE; |
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1259 for (j = 0; j < dnp[i].dn_nblkptr; j++) { |
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1260 if (dnp[i].dn_blkptr[j].blk_birth > txg) |
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1261 newcontents = B_TRUE; |
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1262 } |
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1263 } |
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1264 if (!dnp[i].dn_type == hole && newcontents) |
| 789 | 1265 break; |
| 1266 *offset += 1ULL << span; | |
| 1267 } | |
| 1268 if (i == blkfill) | |
| 1269 error = ESRCH; | |
| 1270 } else { | |
| 1271 blkptr_t *bp = data; | |
| 1272 span = (lvl - 1) * epbs + dn->dn_datablkshift; | |
| 1273 minfill = 0; | |
| 1274 maxfill = blkfill << ((lvl - 1) * epbs); | |
| 1275 | |
| 1276 if (hole) | |
| 1277 maxfill--; | |
| 1278 else | |
| 1279 minfill++; | |
| 1280 | |
| 1281 for (i = (*offset >> span) & ((1ULL << epbs) - 1); | |
| 1282 i < epb; i++) { | |
| 1283 if (bp[i].blk_fill >= minfill && | |
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1284 bp[i].blk_fill <= maxfill && |
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1285 bp[i].blk_birth > txg) |
| 789 | 1286 break; |
| 1287 *offset += 1ULL << span; | |
| 1288 } | |
| 1289 if (i >= epb) | |
| 1290 error = ESRCH; | |
| 1291 } | |
| 1292 | |
| 1293 if (db) | |
| 1544 | 1294 dbuf_rele(db, FTAG); |
| 789 | 1295 |
| 1296 return (error); | |
| 1297 } | |
| 1298 | |
| 1299 /* | |
| 1300 * Find the next hole, data, or sparse region at or after *offset. | |
| 1301 * The value 'blkfill' tells us how many items we expect to find | |
| 1302 * in an L0 data block; this value is 1 for normal objects, | |
| 1303 * DNODES_PER_BLOCK for the meta dnode, and some fraction of | |
| 1304 * DNODES_PER_BLOCK when searching for sparse regions thereof. | |
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1305 * |
| 789 | 1306 * Examples: |
| 1307 * | |
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1308 * dnode_next_offset(dn, hole, offset, 1, 1, 0); |
| 789 | 1309 * Finds the next hole/data in a file. |
| 1310 * Used in dmu_offset_next(). | |
| 1311 * | |
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1312 * dnode_next_offset(mdn, hole, offset, 0, DNODES_PER_BLOCK, txg); |
| 789 | 1313 * Finds the next free/allocated dnode an objset's meta-dnode. |
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1314 * Only finds objects that have new contents since txg (ie. |
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1315 * bonus buffer changes and content removal are ignored). |
| 789 | 1316 * Used in dmu_object_next(). |
| 1317 * | |
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1318 * dnode_next_offset(mdn, TRUE, offset, 2, DNODES_PER_BLOCK >> 2, 0); |
| 789 | 1319 * Finds the next L2 meta-dnode bp that's at most 1/4 full. |
| 1320 * Used in dmu_object_alloc(). | |
| 1321 */ | |
| 1322 int | |
| 1323 dnode_next_offset(dnode_t *dn, boolean_t hole, uint64_t *offset, | |
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1324 int minlvl, uint64_t blkfill, uint64_t txg) |
| 789 | 1325 { |
| 1326 int lvl, maxlvl; | |
| 1327 int error = 0; | |
| 1328 uint64_t initial_offset = *offset; | |
| 1329 | |
| 1330 rw_enter(&dn->dn_struct_rwlock, RW_READER); | |
| 1331 | |
| 1332 if (dn->dn_phys->dn_nlevels == 0) { | |
| 1333 rw_exit(&dn->dn_struct_rwlock); | |
| 1334 return (ESRCH); | |
| 1335 } | |
| 1336 | |
| 1337 if (dn->dn_datablkshift == 0) { | |
| 1338 if (*offset < dn->dn_datablksz) { | |
| 1339 if (hole) | |
| 1340 *offset = dn->dn_datablksz; | |
| 1341 } else { | |
| 1342 error = ESRCH; | |
| 1343 } | |
| 1344 rw_exit(&dn->dn_struct_rwlock); | |
| 1345 return (error); | |
| 1346 } | |
| 1347 | |
| 1348 maxlvl = dn->dn_phys->dn_nlevels; | |
| 1349 | |
| 1350 for (lvl = minlvl; lvl <= maxlvl; lvl++) { | |
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1351 error = dnode_next_offset_level(dn, |
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1352 hole, offset, lvl, blkfill, txg); |
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1353 if (error != ESRCH) |
| 789 | 1354 break; |
| 1355 } | |
| 1356 | |
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1357 while (--lvl >= minlvl && error == 0) { |
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1358 error = dnode_next_offset_level(dn, |
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1359 hole, offset, lvl, blkfill, txg); |
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1360 } |
| 789 | 1361 |
| 1362 rw_exit(&dn->dn_struct_rwlock); | |
| 1363 | |
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1364 if (error == 0 && initial_offset > *offset) |
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1365 error = ESRCH; |
| 789 | 1366 |
| 1367 return (error); | |
| 1368 } |