Mercurial > illumos > illumos-gate
annotate usr/src/uts/common/fs/zfs/dnode.c @ 7754:b80e4842ad54
6754011 SPA 3.0: lock breakup, i/o pipeline refactoring, device failure handling
6667208 zfs/zpool commands on failed pool should not hang
6430480 grabbing config lock as writer during I/O load can take excessively long
| author | Jeff Bonwick <Jeff.Bonwick@Sun.COM> |
|---|---|
| date | Mon, 29 Sep 2008 18:13:58 -0700 |
| parents | f69ff8507427 |
| children | d7abf7c1f1c1 |
| 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 /* | |
| 6992 | 22 * Copyright 2008 Sun Microsystems, Inc. All rights reserved. |
| 789 | 23 * Use is subject to license terms. |
| 24 */ | |
| 25 | |
| 26 #include <sys/zfs_context.h> | |
| 27 #include <sys/dbuf.h> | |
| 28 #include <sys/dnode.h> | |
| 29 #include <sys/dmu.h> | |
| 30 #include <sys/dmu_impl.h> | |
| 31 #include <sys/dmu_tx.h> | |
| 32 #include <sys/dmu_objset.h> | |
| 33 #include <sys/dsl_dir.h> | |
| 34 #include <sys/dsl_dataset.h> | |
| 35 #include <sys/spa.h> | |
| 36 #include <sys/zio.h> | |
| 37 #include <sys/dmu_zfetch.h> | |
| 38 | |
| 39 static int free_range_compar(const void *node1, const void *node2); | |
| 40 | |
| 41 static kmem_cache_t *dnode_cache; | |
| 42 | |
| 43 static dnode_phys_t dnode_phys_zero; | |
| 44 | |
| 45 int zfs_default_bs = SPA_MINBLOCKSHIFT; | |
| 46 int zfs_default_ibs = DN_MAX_INDBLKSHIFT; | |
| 47 | |
| 48 /* ARGSUSED */ | |
| 49 static int | |
| 50 dnode_cons(void *arg, void *unused, int kmflag) | |
| 51 { | |
| 52 int i; | |
| 53 dnode_t *dn = arg; | |
| 54 bzero(dn, sizeof (dnode_t)); | |
| 55 | |
| 56 rw_init(&dn->dn_struct_rwlock, NULL, RW_DEFAULT, NULL); | |
| 57 mutex_init(&dn->dn_mtx, NULL, MUTEX_DEFAULT, NULL); | |
| 58 mutex_init(&dn->dn_dbufs_mtx, NULL, MUTEX_DEFAULT, NULL); | |
| 59 refcount_create(&dn->dn_holds); | |
| 60 refcount_create(&dn->dn_tx_holds); | |
| 61 | |
| 62 for (i = 0; i < TXG_SIZE; i++) { | |
| 63 avl_create(&dn->dn_ranges[i], free_range_compar, | |
| 64 sizeof (free_range_t), | |
| 65 offsetof(struct free_range, fr_node)); | |
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66 list_create(&dn->dn_dirty_records[i], |
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67 sizeof (dbuf_dirty_record_t), |
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68 offsetof(dbuf_dirty_record_t, dr_dirty_node)); |
| 789 | 69 } |
| 70 | |
| 71 list_create(&dn->dn_dbufs, sizeof (dmu_buf_impl_t), | |
| 72 offsetof(dmu_buf_impl_t, db_link)); | |
| 73 | |
| 74 return (0); | |
| 75 } | |
| 76 | |
| 77 /* ARGSUSED */ | |
| 78 static void | |
| 79 dnode_dest(void *arg, void *unused) | |
| 80 { | |
| 81 int i; | |
| 82 dnode_t *dn = arg; | |
| 83 | |
| 84 rw_destroy(&dn->dn_struct_rwlock); | |
| 85 mutex_destroy(&dn->dn_mtx); | |
| 86 mutex_destroy(&dn->dn_dbufs_mtx); | |
| 87 refcount_destroy(&dn->dn_holds); | |
| 88 refcount_destroy(&dn->dn_tx_holds); | |
| 89 | |
| 90 for (i = 0; i < TXG_SIZE; i++) { | |
| 91 avl_destroy(&dn->dn_ranges[i]); | |
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92 list_destroy(&dn->dn_dirty_records[i]); |
| 789 | 93 } |
| 94 | |
| 95 list_destroy(&dn->dn_dbufs); | |
| 96 } | |
| 97 | |
| 98 void | |
| 99 dnode_init(void) | |
| 100 { | |
| 101 dnode_cache = kmem_cache_create("dnode_t", | |
| 102 sizeof (dnode_t), | |
| 103 0, dnode_cons, dnode_dest, NULL, NULL, NULL, 0); | |
| 104 } | |
| 105 | |
| 106 void | |
| 107 dnode_fini(void) | |
| 108 { | |
| 109 kmem_cache_destroy(dnode_cache); | |
| 110 } | |
| 111 | |
| 112 | |
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113 #ifdef ZFS_DEBUG |
| 789 | 114 void |
| 115 dnode_verify(dnode_t *dn) | |
| 116 { | |
| 117 int drop_struct_lock = FALSE; | |
| 118 | |
| 119 ASSERT(dn->dn_phys); | |
| 120 ASSERT(dn->dn_objset); | |
| 121 | |
| 122 ASSERT(dn->dn_phys->dn_type < DMU_OT_NUMTYPES); | |
| 123 | |
| 124 if (!(zfs_flags & ZFS_DEBUG_DNODE_VERIFY)) | |
| 125 return; | |
| 126 | |
| 127 if (!RW_WRITE_HELD(&dn->dn_struct_rwlock)) { | |
| 128 rw_enter(&dn->dn_struct_rwlock, RW_READER); | |
| 129 drop_struct_lock = TRUE; | |
| 130 } | |
| 131 if (dn->dn_phys->dn_type != DMU_OT_NONE || dn->dn_allocated_txg != 0) { | |
| 132 int i; | |
| 133 ASSERT3U(dn->dn_indblkshift, >=, 0); | |
| 134 ASSERT3U(dn->dn_indblkshift, <=, SPA_MAXBLOCKSHIFT); | |
| 135 if (dn->dn_datablkshift) { | |
| 136 ASSERT3U(dn->dn_datablkshift, >=, SPA_MINBLOCKSHIFT); | |
| 137 ASSERT3U(dn->dn_datablkshift, <=, SPA_MAXBLOCKSHIFT); | |
| 138 ASSERT3U(1<<dn->dn_datablkshift, ==, dn->dn_datablksz); | |
| 139 } | |
| 140 ASSERT3U(dn->dn_nlevels, <=, 30); | |
| 141 ASSERT3U(dn->dn_type, <=, DMU_OT_NUMTYPES); | |
| 142 ASSERT3U(dn->dn_nblkptr, >=, 1); | |
| 143 ASSERT3U(dn->dn_nblkptr, <=, DN_MAX_NBLKPTR); | |
| 144 ASSERT3U(dn->dn_bonuslen, <=, DN_MAX_BONUSLEN); | |
| 145 ASSERT3U(dn->dn_datablksz, ==, | |
| 146 dn->dn_datablkszsec << SPA_MINBLOCKSHIFT); | |
| 147 ASSERT3U(ISP2(dn->dn_datablksz), ==, dn->dn_datablkshift != 0); | |
| 148 ASSERT3U((dn->dn_nblkptr - 1) * sizeof (blkptr_t) + | |
| 149 dn->dn_bonuslen, <=, DN_MAX_BONUSLEN); | |
| 150 for (i = 0; i < TXG_SIZE; i++) { | |
| 151 ASSERT3U(dn->dn_next_nlevels[i], <=, dn->dn_nlevels); | |
| 152 } | |
| 153 } | |
| 154 if (dn->dn_phys->dn_type != DMU_OT_NONE) | |
| 155 ASSERT3U(dn->dn_phys->dn_nlevels, <=, dn->dn_nlevels); | |
| 1544 | 156 ASSERT(dn->dn_object == DMU_META_DNODE_OBJECT || dn->dn_dbuf != NULL); |
| 789 | 157 if (dn->dn_dbuf != NULL) { |
| 158 ASSERT3P(dn->dn_phys, ==, | |
| 159 (dnode_phys_t *)dn->dn_dbuf->db.db_data + | |
| 160 (dn->dn_object % (dn->dn_dbuf->db.db_size >> DNODE_SHIFT))); | |
| 161 } | |
| 162 if (drop_struct_lock) | |
| 163 rw_exit(&dn->dn_struct_rwlock); | |
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164 } |
| 789 | 165 #endif |
| 166 | |
| 167 void | |
| 168 dnode_byteswap(dnode_phys_t *dnp) | |
| 169 { | |
| 170 uint64_t *buf64 = (void*)&dnp->dn_blkptr; | |
| 171 int i; | |
| 172 | |
| 173 if (dnp->dn_type == DMU_OT_NONE) { | |
| 174 bzero(dnp, sizeof (dnode_phys_t)); | |
| 175 return; | |
| 176 } | |
| 177 | |
| 178 dnp->dn_datablkszsec = BSWAP_16(dnp->dn_datablkszsec); | |
| 179 dnp->dn_bonuslen = BSWAP_16(dnp->dn_bonuslen); | |
| 180 dnp->dn_maxblkid = BSWAP_64(dnp->dn_maxblkid); | |
| 2082 | 181 dnp->dn_used = BSWAP_64(dnp->dn_used); |
| 789 | 182 |
| 183 /* | |
| 184 * dn_nblkptr is only one byte, so it's OK to read it in either | |
| 185 * byte order. We can't read dn_bouslen. | |
| 186 */ | |
| 187 ASSERT(dnp->dn_indblkshift <= SPA_MAXBLOCKSHIFT); | |
| 188 ASSERT(dnp->dn_nblkptr <= DN_MAX_NBLKPTR); | |
| 189 for (i = 0; i < dnp->dn_nblkptr * sizeof (blkptr_t)/8; i++) | |
| 190 buf64[i] = BSWAP_64(buf64[i]); | |
| 191 | |
| 192 /* | |
| 193 * OK to check dn_bonuslen for zero, because it won't matter if | |
| 194 * we have the wrong byte order. This is necessary because the | |
| 195 * dnode dnode is smaller than a regular dnode. | |
| 196 */ | |
| 197 if (dnp->dn_bonuslen != 0) { | |
| 198 /* | |
| 199 * Note that the bonus length calculated here may be | |
| 200 * longer than the actual bonus buffer. This is because | |
| 201 * we always put the bonus buffer after the last block | |
| 202 * pointer (instead of packing it against the end of the | |
| 203 * dnode buffer). | |
| 204 */ | |
| 205 int off = (dnp->dn_nblkptr-1) * sizeof (blkptr_t); | |
| 206 size_t len = DN_MAX_BONUSLEN - off; | |
| 3882 | 207 ASSERT3U(dnp->dn_bonustype, <, DMU_OT_NUMTYPES); |
| 789 | 208 dmu_ot[dnp->dn_bonustype].ot_byteswap(dnp->dn_bonus + off, len); |
| 209 } | |
| 210 } | |
| 211 | |
| 212 void | |
| 213 dnode_buf_byteswap(void *vbuf, size_t size) | |
| 214 { | |
| 215 dnode_phys_t *buf = vbuf; | |
| 216 int i; | |
| 217 | |
| 218 ASSERT3U(sizeof (dnode_phys_t), ==, (1<<DNODE_SHIFT)); | |
| 219 ASSERT((size & (sizeof (dnode_phys_t)-1)) == 0); | |
| 220 | |
| 221 size >>= DNODE_SHIFT; | |
| 222 for (i = 0; i < size; i++) { | |
| 223 dnode_byteswap(buf); | |
| 224 buf++; | |
| 225 } | |
| 226 } | |
| 227 | |
| 228 static int | |
| 229 free_range_compar(const void *node1, const void *node2) | |
| 230 { | |
| 231 const free_range_t *rp1 = node1; | |
| 232 const free_range_t *rp2 = node2; | |
| 233 | |
| 234 if (rp1->fr_blkid < rp2->fr_blkid) | |
| 235 return (-1); | |
| 236 else if (rp1->fr_blkid > rp2->fr_blkid) | |
| 237 return (1); | |
| 238 else return (0); | |
| 239 } | |
| 240 | |
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241 void |
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242 dnode_setbonuslen(dnode_t *dn, int newsize, dmu_tx_t *tx) |
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243 { |
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244 ASSERT3U(refcount_count(&dn->dn_holds), >=, 1); |
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245 |
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246 dnode_setdirty(dn, tx); |
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247 rw_enter(&dn->dn_struct_rwlock, RW_WRITER); |
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248 ASSERT3U(newsize, <=, DN_MAX_BONUSLEN - |
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249 (dn->dn_nblkptr-1) * sizeof (blkptr_t)); |
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250 dn->dn_bonuslen = newsize; |
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251 if (newsize == 0) |
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252 dn->dn_next_bonuslen[tx->tx_txg & TXG_MASK] = DN_ZERO_BONUSLEN; |
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253 else |
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254 dn->dn_next_bonuslen[tx->tx_txg & TXG_MASK] = dn->dn_bonuslen; |
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255 rw_exit(&dn->dn_struct_rwlock); |
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256 } |
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257 |
| 789 | 258 static void |
| 259 dnode_setdblksz(dnode_t *dn, int size) | |
| 260 { | |
| 261 ASSERT3U(P2PHASE(size, SPA_MINBLOCKSIZE), ==, 0); | |
| 262 ASSERT3U(size, <=, SPA_MAXBLOCKSIZE); | |
| 263 ASSERT3U(size, >=, SPA_MINBLOCKSIZE); | |
| 264 ASSERT3U(size >> SPA_MINBLOCKSHIFT, <, | |
| 265 1<<(sizeof (dn->dn_phys->dn_datablkszsec) * 8)); | |
| 266 dn->dn_datablksz = size; | |
| 267 dn->dn_datablkszsec = size >> SPA_MINBLOCKSHIFT; | |
| 268 dn->dn_datablkshift = ISP2(size) ? highbit(size - 1) : 0; | |
| 269 } | |
| 270 | |
| 271 static dnode_t * | |
| 272 dnode_create(objset_impl_t *os, dnode_phys_t *dnp, dmu_buf_impl_t *db, | |
| 273 uint64_t object) | |
| 274 { | |
| 275 dnode_t *dn = kmem_cache_alloc(dnode_cache, KM_SLEEP); | |
| 276 (void) dnode_cons(dn, NULL, 0); /* XXX */ | |
| 277 | |
| 278 dn->dn_objset = os; | |
| 279 dn->dn_object = object; | |
| 280 dn->dn_dbuf = db; | |
| 281 dn->dn_phys = dnp; | |
| 282 | |
| 283 if (dnp->dn_datablkszsec) | |
| 284 dnode_setdblksz(dn, dnp->dn_datablkszsec << SPA_MINBLOCKSHIFT); | |
| 285 dn->dn_indblkshift = dnp->dn_indblkshift; | |
| 286 dn->dn_nlevels = dnp->dn_nlevels; | |
| 287 dn->dn_type = dnp->dn_type; | |
| 288 dn->dn_nblkptr = dnp->dn_nblkptr; | |
| 289 dn->dn_checksum = dnp->dn_checksum; | |
| 290 dn->dn_compress = dnp->dn_compress; | |
| 291 dn->dn_bonustype = dnp->dn_bonustype; | |
| 292 dn->dn_bonuslen = dnp->dn_bonuslen; | |
| 293 dn->dn_maxblkid = dnp->dn_maxblkid; | |
| 294 | |
| 295 dmu_zfetch_init(&dn->dn_zfetch, dn); | |
| 296 | |
| 297 ASSERT(dn->dn_phys->dn_type < DMU_OT_NUMTYPES); | |
| 298 mutex_enter(&os->os_lock); | |
| 299 list_insert_head(&os->os_dnodes, dn); | |
| 300 mutex_exit(&os->os_lock); | |
| 301 | |
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302 arc_space_consume(sizeof (dnode_t)); |
| 789 | 303 return (dn); |
| 304 } | |
| 305 | |
| 306 static void | |
| 307 dnode_destroy(dnode_t *dn) | |
| 308 { | |
| 309 objset_impl_t *os = dn->dn_objset; | |
| 310 | |
| 2885 | 311 #ifdef ZFS_DEBUG |
| 312 int i; | |
| 313 | |
| 314 for (i = 0; i < TXG_SIZE; i++) { | |
| 315 ASSERT(!list_link_active(&dn->dn_dirty_link[i])); | |
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316 ASSERT(NULL == list_head(&dn->dn_dirty_records[i])); |
| 2885 | 317 ASSERT(0 == avl_numnodes(&dn->dn_ranges[i])); |
| 318 } | |
| 319 ASSERT(NULL == list_head(&dn->dn_dbufs)); | |
| 320 #endif | |
| 321 | |
| 789 | 322 mutex_enter(&os->os_lock); |
| 323 list_remove(&os->os_dnodes, dn); | |
| 324 mutex_exit(&os->os_lock); | |
| 325 | |
| 326 if (dn->dn_dirtyctx_firstset) { | |
| 327 kmem_free(dn->dn_dirtyctx_firstset, 1); | |
| 328 dn->dn_dirtyctx_firstset = NULL; | |
| 329 } | |
| 330 dmu_zfetch_rele(&dn->dn_zfetch); | |
| 1544 | 331 if (dn->dn_bonus) { |
| 332 mutex_enter(&dn->dn_bonus->db_mtx); | |
| 333 dbuf_evict(dn->dn_bonus); | |
| 334 dn->dn_bonus = NULL; | |
| 335 } | |
| 789 | 336 kmem_cache_free(dnode_cache, dn); |
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337 arc_space_return(sizeof (dnode_t)); |
| 789 | 338 } |
| 339 | |
| 340 void | |
| 341 dnode_allocate(dnode_t *dn, dmu_object_type_t ot, int blocksize, int ibs, | |
| 1599 | 342 dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx) |
| 789 | 343 { |
| 344 int i; | |
| 345 | |
| 346 if (blocksize == 0) | |
| 347 blocksize = 1 << zfs_default_bs; | |
| 1402 | 348 else if (blocksize > SPA_MAXBLOCKSIZE) |
| 349 blocksize = SPA_MAXBLOCKSIZE; | |
| 350 else | |
| 351 blocksize = P2ROUNDUP(blocksize, SPA_MINBLOCKSIZE); | |
| 789 | 352 |
| 353 if (ibs == 0) | |
| 354 ibs = zfs_default_ibs; | |
| 355 | |
| 356 ibs = MIN(MAX(ibs, DN_MIN_INDBLKSHIFT), DN_MAX_INDBLKSHIFT); | |
| 357 | |
| 358 dprintf("os=%p obj=%llu txg=%llu blocksize=%d ibs=%d\n", dn->dn_objset, | |
| 359 dn->dn_object, tx->tx_txg, blocksize, ibs); | |
| 360 | |
| 361 ASSERT(dn->dn_type == DMU_OT_NONE); | |
| 362 ASSERT(bcmp(dn->dn_phys, &dnode_phys_zero, sizeof (dnode_phys_t)) == 0); | |
| 363 ASSERT(dn->dn_phys->dn_type == DMU_OT_NONE); | |
| 364 ASSERT(ot != DMU_OT_NONE); | |
| 365 ASSERT3U(ot, <, DMU_OT_NUMTYPES); | |
| 366 ASSERT((bonustype == DMU_OT_NONE && bonuslen == 0) || | |
| 367 (bonustype != DMU_OT_NONE && bonuslen != 0)); | |
| 368 ASSERT3U(bonustype, <, DMU_OT_NUMTYPES); | |
| 369 ASSERT3U(bonuslen, <=, DN_MAX_BONUSLEN); | |
| 370 ASSERT(dn->dn_type == DMU_OT_NONE); | |
| 371 ASSERT3U(dn->dn_maxblkid, ==, 0); | |
| 372 ASSERT3U(dn->dn_allocated_txg, ==, 0); | |
| 373 ASSERT3U(dn->dn_assigned_txg, ==, 0); | |
| 374 ASSERT(refcount_is_zero(&dn->dn_tx_holds)); | |
| 375 ASSERT3U(refcount_count(&dn->dn_holds), <=, 1); | |
| 376 ASSERT3P(list_head(&dn->dn_dbufs), ==, NULL); | |
| 377 | |
| 378 for (i = 0; i < TXG_SIZE; i++) { | |
| 379 ASSERT3U(dn->dn_next_nlevels[i], ==, 0); | |
| 380 ASSERT3U(dn->dn_next_indblkshift[i], ==, 0); | |
|
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381 ASSERT3U(dn->dn_next_bonuslen[i], ==, 0); |
|
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382 ASSERT3U(dn->dn_next_blksz[i], ==, 0); |
|
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383 ASSERT(!list_link_active(&dn->dn_dirty_link[i])); |
|
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384 ASSERT3P(list_head(&dn->dn_dirty_records[i]), ==, NULL); |
| 789 | 385 ASSERT3U(avl_numnodes(&dn->dn_ranges[i]), ==, 0); |
| 386 } | |
| 387 | |
| 388 dn->dn_type = ot; | |
| 389 dnode_setdblksz(dn, blocksize); | |
| 390 dn->dn_indblkshift = ibs; | |
| 391 dn->dn_nlevels = 1; | |
| 392 dn->dn_nblkptr = 1 + ((DN_MAX_BONUSLEN - bonuslen) >> SPA_BLKPTRSHIFT); | |
| 393 dn->dn_bonustype = bonustype; | |
| 394 dn->dn_bonuslen = bonuslen; | |
| 395 dn->dn_checksum = ZIO_CHECKSUM_INHERIT; | |
| 396 dn->dn_compress = ZIO_COMPRESS_INHERIT; | |
| 397 dn->dn_dirtyctx = 0; | |
| 398 | |
| 399 dn->dn_free_txg = 0; | |
| 400 if (dn->dn_dirtyctx_firstset) { | |
| 401 kmem_free(dn->dn_dirtyctx_firstset, 1); | |
| 402 dn->dn_dirtyctx_firstset = NULL; | |
| 403 } | |
| 404 | |
| 405 dn->dn_allocated_txg = tx->tx_txg; | |
| 1599 | 406 |
| 789 | 407 dnode_setdirty(dn, tx); |
| 1599 | 408 dn->dn_next_indblkshift[tx->tx_txg & TXG_MASK] = ibs; |
|
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409 dn->dn_next_bonuslen[tx->tx_txg & TXG_MASK] = dn->dn_bonuslen; |
| 1599 | 410 dn->dn_next_blksz[tx->tx_txg & TXG_MASK] = dn->dn_datablksz; |
| 789 | 411 } |
| 412 | |
| 413 void | |
| 414 dnode_reallocate(dnode_t *dn, dmu_object_type_t ot, int blocksize, | |
| 415 dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx) | |
| 416 { | |
|
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417 int i, old_nblkptr; |
| 3087 | 418 dmu_buf_impl_t *db = NULL; |
|
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419 |
| 789 | 420 ASSERT3U(blocksize, >=, SPA_MINBLOCKSIZE); |
| 421 ASSERT3U(blocksize, <=, SPA_MAXBLOCKSIZE); | |
| 422 ASSERT3U(blocksize % SPA_MINBLOCKSIZE, ==, 0); | |
| 1544 | 423 ASSERT(dn->dn_object != DMU_META_DNODE_OBJECT || dmu_tx_private_ok(tx)); |
| 789 | 424 ASSERT(tx->tx_txg != 0); |
| 425 ASSERT((bonustype == DMU_OT_NONE && bonuslen == 0) || | |
| 426 (bonustype != DMU_OT_NONE && bonuslen != 0)); | |
| 427 ASSERT3U(bonustype, <, DMU_OT_NUMTYPES); | |
| 428 ASSERT3U(bonuslen, <=, DN_MAX_BONUSLEN); | |
|
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429 |
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430 for (i = 0; i < TXG_SIZE; i++) |
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431 ASSERT(!list_link_active(&dn->dn_dirty_link[i])); |
| 789 | 432 |
| 1544 | 433 /* clean up any unreferenced dbufs */ |
|
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434 dnode_evict_dbufs(dn); |
| 1544 | 435 ASSERT3P(list_head(&dn->dn_dbufs), ==, NULL); |
| 436 | |
| 789 | 437 /* |
| 438 * XXX I should really have a generation number to tell if we | |
| 439 * need to do this... | |
| 440 */ | |
| 441 if (blocksize != dn->dn_datablksz || | |
| 442 dn->dn_bonustype != bonustype || dn->dn_bonuslen != bonuslen) { | |
| 443 /* free all old data */ | |
| 444 dnode_free_range(dn, 0, -1ULL, tx); | |
| 445 } | |
| 446 | |
| 447 /* change blocksize */ | |
| 448 rw_enter(&dn->dn_struct_rwlock, RW_WRITER); | |
| 3087 | 449 if (blocksize != dn->dn_datablksz && |
| 450 (!BP_IS_HOLE(&dn->dn_phys->dn_blkptr[0]) || | |
| 451 list_head(&dn->dn_dbufs) != NULL)) { | |
| 452 db = dbuf_hold(dn, 0, FTAG); | |
| 453 dbuf_new_size(db, blocksize, tx); | |
| 454 } | |
| 789 | 455 dnode_setdblksz(dn, blocksize); |
| 456 dnode_setdirty(dn, tx); | |
|
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457 dn->dn_next_bonuslen[tx->tx_txg&TXG_MASK] = bonuslen; |
|
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458 dn->dn_next_blksz[tx->tx_txg&TXG_MASK] = blocksize; |
| 789 | 459 rw_exit(&dn->dn_struct_rwlock); |
|
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460 if (db) |
| 3087 | 461 dbuf_rele(db, FTAG); |
| 789 | 462 |
| 463 /* change type */ | |
| 464 dn->dn_type = ot; | |
| 465 | |
| 466 /* change bonus size and type */ | |
| 467 mutex_enter(&dn->dn_mtx); | |
|
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468 old_nblkptr = dn->dn_nblkptr; |
| 789 | 469 dn->dn_bonustype = bonustype; |
| 470 dn->dn_bonuslen = bonuslen; | |
| 471 dn->dn_nblkptr = 1 + ((DN_MAX_BONUSLEN - bonuslen) >> SPA_BLKPTRSHIFT); | |
| 472 dn->dn_checksum = ZIO_CHECKSUM_INHERIT; | |
| 473 dn->dn_compress = ZIO_COMPRESS_INHERIT; | |
| 474 ASSERT3U(dn->dn_nblkptr, <=, DN_MAX_NBLKPTR); | |
| 475 | |
|
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476 /* XXX - for now, we can't make nblkptr smaller */ |
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477 ASSERT3U(dn->dn_nblkptr, >=, old_nblkptr); |
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478 |
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479 /* fix up the bonus db_size if dn_nblkptr has changed */ |
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480 if (dn->dn_bonus && dn->dn_bonuslen != old_nblkptr) { |
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481 dn->dn_bonus->db.db_size = |
|
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482 DN_MAX_BONUSLEN - (dn->dn_nblkptr-1) * sizeof (blkptr_t); |
|
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483 ASSERT(dn->dn_bonuslen <= dn->dn_bonus->db.db_size); |
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|
484 } |
| 3087 | 485 |
| 789 | 486 dn->dn_allocated_txg = tx->tx_txg; |
| 487 mutex_exit(&dn->dn_mtx); | |
| 488 } | |
| 489 | |
| 490 void | |
| 491 dnode_special_close(dnode_t *dn) | |
| 492 { | |
| 1544 | 493 /* |
| 494 * Wait for final references to the dnode to clear. This can | |
| 495 * only happen if the arc is asyncronously evicting state that | |
| 496 * has a hold on this dnode while we are trying to evict this | |
| 497 * dnode. | |
| 498 */ | |
| 499 while (refcount_count(&dn->dn_holds) > 0) | |
| 500 delay(1); | |
| 789 | 501 dnode_destroy(dn); |
| 502 } | |
| 503 | |
| 504 dnode_t * | |
| 505 dnode_special_open(objset_impl_t *os, dnode_phys_t *dnp, uint64_t object) | |
| 506 { | |
| 507 dnode_t *dn = dnode_create(os, dnp, NULL, object); | |
|
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508 DNODE_VERIFY(dn); |
| 789 | 509 return (dn); |
| 510 } | |
| 511 | |
| 512 static void | |
| 513 dnode_buf_pageout(dmu_buf_t *db, void *arg) | |
| 514 { | |
| 515 dnode_t **children_dnodes = arg; | |
| 516 int i; | |
| 517 int epb = db->db_size >> DNODE_SHIFT; | |
| 518 | |
| 519 for (i = 0; i < epb; i++) { | |
| 520 dnode_t *dn = children_dnodes[i]; | |
| 521 int n; | |
| 522 | |
| 523 if (dn == NULL) | |
| 524 continue; | |
| 525 #ifdef ZFS_DEBUG | |
| 526 /* | |
| 527 * If there are holds on this dnode, then there should | |
| 528 * be holds on the dnode's containing dbuf as well; thus | |
| 529 * it wouldn't be eligable for eviction and this function | |
| 530 * would not have been called. | |
| 531 */ | |
| 532 ASSERT(refcount_is_zero(&dn->dn_holds)); | |
| 533 ASSERT(list_head(&dn->dn_dbufs) == NULL); | |
| 534 ASSERT(refcount_is_zero(&dn->dn_tx_holds)); | |
| 535 | |
| 536 for (n = 0; n < TXG_SIZE; n++) | |
|
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537 ASSERT(!list_link_active(&dn->dn_dirty_link[n])); |
| 789 | 538 #endif |
| 539 children_dnodes[i] = NULL; | |
| 540 dnode_destroy(dn); | |
| 541 } | |
| 542 kmem_free(children_dnodes, epb * sizeof (dnode_t *)); | |
| 543 } | |
| 544 | |
| 545 /* | |
| 1544 | 546 * errors: |
| 547 * EINVAL - invalid object number. | |
| 548 * EIO - i/o error. | |
| 549 * succeeds even for free dnodes. | |
| 789 | 550 */ |
| 1544 | 551 int |
| 552 dnode_hold_impl(objset_impl_t *os, uint64_t object, int flag, | |
| 553 void *tag, dnode_t **dnp) | |
| 789 | 554 { |
| 1544 | 555 int epb, idx, err; |
| 789 | 556 int drop_struct_lock = FALSE; |
| 1544 | 557 int type; |
| 789 | 558 uint64_t blk; |
| 559 dnode_t *mdn, *dn; | |
| 560 dmu_buf_impl_t *db; | |
| 561 dnode_t **children_dnodes; | |
| 562 | |
|
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563 /* |
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564 * If you are holding the spa config lock as writer, you shouldn't |
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565 * be asking the DMU to do *anything*. |
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|
566 */ |
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567 ASSERT(spa_config_held(os->os_spa, SCL_ALL, RW_WRITER) == 0); |
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|
568 |
| 789 | 569 if (object == 0 || object >= DN_MAX_OBJECT) |
| 1544 | 570 return (EINVAL); |
| 789 | 571 |
| 572 mdn = os->os_meta_dnode; | |
| 573 | |
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574 DNODE_VERIFY(mdn); |
| 789 | 575 |
| 576 if (!RW_WRITE_HELD(&mdn->dn_struct_rwlock)) { | |
| 577 rw_enter(&mdn->dn_struct_rwlock, RW_READER); | |
| 578 drop_struct_lock = TRUE; | |
| 579 } | |
| 580 | |
| 581 blk = dbuf_whichblock(mdn, object * sizeof (dnode_phys_t)); | |
| 582 | |
| 1544 | 583 db = dbuf_hold(mdn, blk, FTAG); |
| 789 | 584 if (drop_struct_lock) |
| 585 rw_exit(&mdn->dn_struct_rwlock); | |
| 1544 | 586 if (db == NULL) |
| 587 return (EIO); | |
| 588 err = dbuf_read(db, NULL, DB_RF_CANFAIL); | |
| 589 if (err) { | |
| 590 dbuf_rele(db, FTAG); | |
| 591 return (err); | |
| 592 } | |
| 789 | 593 |
| 594 ASSERT3U(db->db.db_size, >=, 1<<DNODE_SHIFT); | |
| 595 epb = db->db.db_size >> DNODE_SHIFT; | |
| 596 | |
| 597 idx = object & (epb-1); | |
| 598 | |
| 599 children_dnodes = dmu_buf_get_user(&db->db); | |
| 600 if (children_dnodes == NULL) { | |
| 601 dnode_t **winner; | |
| 602 children_dnodes = kmem_zalloc(epb * sizeof (dnode_t *), | |
| 603 KM_SLEEP); | |
| 604 if (winner = dmu_buf_set_user(&db->db, children_dnodes, NULL, | |
| 605 dnode_buf_pageout)) { | |
| 606 kmem_free(children_dnodes, epb * sizeof (dnode_t *)); | |
| 607 children_dnodes = winner; | |
| 608 } | |
| 609 } | |
| 610 | |
| 611 if ((dn = children_dnodes[idx]) == NULL) { | |
|
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612 dnode_phys_t *dnp = (dnode_phys_t *)db->db.db_data+idx; |
| 789 | 613 dnode_t *winner; |
|
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614 |
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615 dn = dnode_create(os, dnp, db, object); |
| 789 | 616 winner = atomic_cas_ptr(&children_dnodes[idx], NULL, dn); |
| 617 if (winner != NULL) { | |
| 618 dnode_destroy(dn); | |
| 619 dn = winner; | |
| 620 } | |
| 621 } | |
| 622 | |
| 623 mutex_enter(&dn->dn_mtx); | |
| 1544 | 624 type = dn->dn_type; |
| 789 | 625 if (dn->dn_free_txg || |
| 1544 | 626 ((flag & DNODE_MUST_BE_ALLOCATED) && type == DMU_OT_NONE) || |
| 627 ((flag & DNODE_MUST_BE_FREE) && type != DMU_OT_NONE)) { | |
| 789 | 628 mutex_exit(&dn->dn_mtx); |
| 1544 | 629 dbuf_rele(db, FTAG); |
| 630 return (type == DMU_OT_NONE ? ENOENT : EEXIST); | |
| 789 | 631 } |
| 632 mutex_exit(&dn->dn_mtx); | |
| 633 | |
| 1544 | 634 if (refcount_add(&dn->dn_holds, tag) == 1) |
| 789 | 635 dbuf_add_ref(db, dn); |
| 636 | |
|
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637 DNODE_VERIFY(dn); |
| 789 | 638 ASSERT3P(dn->dn_dbuf, ==, db); |
| 639 ASSERT3U(dn->dn_object, ==, object); | |
| 1544 | 640 dbuf_rele(db, FTAG); |
| 789 | 641 |
| 1544 | 642 *dnp = dn; |
| 643 return (0); | |
| 789 | 644 } |
| 645 | |
| 646 /* | |
| 647 * Return held dnode if the object is allocated, NULL if not. | |
| 648 */ | |
| 1544 | 649 int |
| 650 dnode_hold(objset_impl_t *os, uint64_t object, void *tag, dnode_t **dnp) | |
| 789 | 651 { |
| 1544 | 652 return (dnode_hold_impl(os, object, DNODE_MUST_BE_ALLOCATED, tag, dnp)); |
| 789 | 653 } |
| 654 | |
|
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655 /* |
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656 * Can only add a reference if there is already at least one |
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657 * reference on the dnode. Returns FALSE if unable to add a |
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658 * new reference. |
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659 */ |
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660 boolean_t |
| 1544 | 661 dnode_add_ref(dnode_t *dn, void *tag) |
| 789 | 662 { |
|
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663 mutex_enter(&dn->dn_mtx); |
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664 if (refcount_is_zero(&dn->dn_holds)) { |
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665 mutex_exit(&dn->dn_mtx); |
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666 return (FALSE); |
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667 } |
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668 VERIFY(1 < refcount_add(&dn->dn_holds, tag)); |
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669 mutex_exit(&dn->dn_mtx); |
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670 return (TRUE); |
| 789 | 671 } |
| 672 | |
| 673 void | |
| 1544 | 674 dnode_rele(dnode_t *dn, void *tag) |
| 789 | 675 { |
| 676 uint64_t refs; | |
| 677 | |
|
4944
96d96f8de974
6569719 panic dangling dbufs (dn=ffffffff28814d30, dbuf=ffffffff20756008)
maybee
parents:
4577
diff
changeset
|
678 mutex_enter(&dn->dn_mtx); |
| 1544 | 679 refs = refcount_remove(&dn->dn_holds, tag); |
|
4944
96d96f8de974
6569719 panic dangling dbufs (dn=ffffffff28814d30, dbuf=ffffffff20756008)
maybee
parents:
4577
diff
changeset
|
680 mutex_exit(&dn->dn_mtx); |
| 789 | 681 /* NOTE: the DNODE_DNODE does not have a dn_dbuf */ |
| 682 if (refs == 0 && dn->dn_dbuf) | |
| 1544 | 683 dbuf_rele(dn->dn_dbuf, dn); |
| 789 | 684 } |
| 685 | |
| 686 void | |
| 687 dnode_setdirty(dnode_t *dn, dmu_tx_t *tx) | |
| 688 { | |
| 689 objset_impl_t *os = dn->dn_objset; | |
| 690 uint64_t txg = tx->tx_txg; | |
| 691 | |
| 1544 | 692 if (dn->dn_object == DMU_META_DNODE_OBJECT) |
| 789 | 693 return; |
| 694 | |
|
873
adefbfa5f42d
6347448 non ZFS_DEBUG kernels shouldn't call empty verify functions
ek110237
parents:
789
diff
changeset
|
695 DNODE_VERIFY(dn); |
| 789 | 696 |
| 697 #ifdef ZFS_DEBUG | |
| 698 mutex_enter(&dn->dn_mtx); | |
| 699 ASSERT(dn->dn_phys->dn_type || dn->dn_allocated_txg); | |
| 700 /* ASSERT(dn->dn_free_txg == 0 || dn->dn_free_txg >= txg); */ | |
| 701 mutex_exit(&dn->dn_mtx); | |
| 702 #endif | |
| 703 | |
| 704 mutex_enter(&os->os_lock); | |
| 705 | |
| 706 /* | |
| 707 * If we are already marked dirty, we're done. | |
| 708 */ | |
|
1596
2e2377ccbf85
6395371 ASSERT in dmu_tx_count_free: blkid + i < dn->dn_phys->dn_nblkptr
ahrens
parents:
1544
diff
changeset
|
709 if (list_link_active(&dn->dn_dirty_link[txg & TXG_MASK])) { |
| 789 | 710 mutex_exit(&os->os_lock); |
| 711 return; | |
| 712 } | |
| 713 | |
| 714 ASSERT(!refcount_is_zero(&dn->dn_holds) || list_head(&dn->dn_dbufs)); | |
| 715 ASSERT(dn->dn_datablksz != 0); | |
|
4944
96d96f8de974
6569719 panic dangling dbufs (dn=ffffffff28814d30, dbuf=ffffffff20756008)
maybee
parents:
4577
diff
changeset
|
716 ASSERT3U(dn->dn_next_bonuslen[txg&TXG_MASK], ==, 0); |
| 1599 | 717 ASSERT3U(dn->dn_next_blksz[txg&TXG_MASK], ==, 0); |
| 789 | 718 |
| 719 dprintf_ds(os->os_dsl_dataset, "obj=%llu txg=%llu\n", | |
| 720 dn->dn_object, txg); | |
| 721 | |
| 722 if (dn->dn_free_txg > 0 && dn->dn_free_txg <= txg) { | |
| 723 list_insert_tail(&os->os_free_dnodes[txg&TXG_MASK], dn); | |
| 724 } else { | |
| 725 list_insert_tail(&os->os_dirty_dnodes[txg&TXG_MASK], dn); | |
| 726 } | |
| 727 | |
| 728 mutex_exit(&os->os_lock); | |
| 729 | |
| 730 /* | |
| 731 * The dnode maintains a hold on its containing dbuf as | |
| 732 * long as there are holds on it. Each instantiated child | |
| 733 * dbuf maintaines a hold on the dnode. When the last child | |
| 734 * drops its hold, the dnode will drop its hold on the | |
| 735 * containing dbuf. We add a "dirty hold" here so that the | |
| 736 * dnode will hang around after we finish processing its | |
| 737 * children. | |
| 738 */ | |
|
4944
96d96f8de974
6569719 panic dangling dbufs (dn=ffffffff28814d30, dbuf=ffffffff20756008)
maybee
parents:
4577
diff
changeset
|
739 VERIFY(dnode_add_ref(dn, (void *)(uintptr_t)tx->tx_txg)); |
| 789 | 740 |
|
3547
e396e0a440b1
6512391 DMU should leverage ZIO dependencies to achieve greater parallelism
maybee
parents:
3087
diff
changeset
|
741 (void) dbuf_dirty(dn->dn_dbuf, tx); |
| 789 | 742 |
| 743 dsl_dataset_dirty(os->os_dsl_dataset, tx); | |
| 744 } | |
| 745 | |
| 746 void | |
| 747 dnode_free(dnode_t *dn, dmu_tx_t *tx) | |
| 748 { | |
|
1596
2e2377ccbf85
6395371 ASSERT in dmu_tx_count_free: blkid + i < dn->dn_phys->dn_nblkptr
ahrens
parents:
1544
diff
changeset
|
749 int txgoff = tx->tx_txg & TXG_MASK; |
|
2e2377ccbf85
6395371 ASSERT in dmu_tx_count_free: blkid + i < dn->dn_phys->dn_nblkptr
ahrens
parents:
1544
diff
changeset
|
750 |
| 789 | 751 dprintf("dn=%p txg=%llu\n", dn, tx->tx_txg); |
| 752 | |
| 753 /* we should be the only holder... hopefully */ | |
| 754 /* ASSERT3U(refcount_count(&dn->dn_holds), ==, 1); */ | |
| 755 | |
| 756 mutex_enter(&dn->dn_mtx); | |
| 757 if (dn->dn_type == DMU_OT_NONE || dn->dn_free_txg) { | |
| 758 mutex_exit(&dn->dn_mtx); | |
| 759 return; | |
| 760 } | |
| 761 dn->dn_free_txg = tx->tx_txg; | |
| 762 mutex_exit(&dn->dn_mtx); | |
| 763 | |
| 764 /* | |
| 765 * If the dnode is already dirty, it needs to be moved from | |
| 766 * the dirty list to the free list. | |
| 767 */ | |
| 768 mutex_enter(&dn->dn_objset->os_lock); | |
|
1596
2e2377ccbf85
6395371 ASSERT in dmu_tx_count_free: blkid + i < dn->dn_phys->dn_nblkptr
ahrens
parents:
1544
diff
changeset
|
769 if (list_link_active(&dn->dn_dirty_link[txgoff])) { |
|
2e2377ccbf85
6395371 ASSERT in dmu_tx_count_free: blkid + i < dn->dn_phys->dn_nblkptr
ahrens
parents:
1544
diff
changeset
|
770 list_remove(&dn->dn_objset->os_dirty_dnodes[txgoff], dn); |
|
2e2377ccbf85
6395371 ASSERT in dmu_tx_count_free: blkid + i < dn->dn_phys->dn_nblkptr
ahrens
parents:
1544
diff
changeset
|
771 list_insert_tail(&dn->dn_objset->os_free_dnodes[txgoff], dn); |
| 789 | 772 mutex_exit(&dn->dn_objset->os_lock); |
| 773 } else { | |
| 774 mutex_exit(&dn->dn_objset->os_lock); | |
| 775 dnode_setdirty(dn, tx); | |
| 776 } | |
| 777 } | |
| 778 | |
| 779 /* | |
| 780 * Try to change the block size for the indicated dnode. This can only | |
| 781 * succeed if there are no blocks allocated or dirty beyond first block | |
| 782 */ | |
| 783 int | |
| 784 dnode_set_blksz(dnode_t *dn, uint64_t size, int ibs, dmu_tx_t *tx) | |
| 785 { | |
| 786 dmu_buf_impl_t *db, *db_next; | |
| 6992 | 787 int err; |
| 789 | 788 |
| 789 if (size == 0) | |
| 790 size = SPA_MINBLOCKSIZE; | |
| 791 if (size > SPA_MAXBLOCKSIZE) | |
| 792 size = SPA_MAXBLOCKSIZE; | |
| 793 else | |
| 794 size = P2ROUNDUP(size, SPA_MINBLOCKSIZE); | |
| 795 | |
|
2445
45c1310316ff
6447381 dnode_free_range() does not handle non-power-of-two blocksizes correctly
ahrens
parents:
2082
diff
changeset
|
796 if (ibs == dn->dn_indblkshift) |
|
45c1310316ff
6447381 dnode_free_range() does not handle non-power-of-two blocksizes correctly
ahrens
parents:
2082
diff
changeset
|
797 ibs = 0; |
| 789 | 798 |
|
2445
45c1310316ff
6447381 dnode_free_range() does not handle non-power-of-two blocksizes correctly
ahrens
parents:
2082
diff
changeset
|
799 if (size >> SPA_MINBLOCKSHIFT == dn->dn_datablkszsec && ibs == 0) |
| 789 | 800 return (0); |
| 801 | |
| 802 rw_enter(&dn->dn_struct_rwlock, RW_WRITER); | |
| 803 | |
| 804 /* Check for any allocated blocks beyond the first */ | |
| 805 if (dn->dn_phys->dn_maxblkid != 0) | |
|
2445
45c1310316ff
6447381 dnode_free_range() does not handle non-power-of-two blocksizes correctly
ahrens
parents:
2082
diff
changeset
|
806 goto fail; |
| 789 | 807 |
| 808 mutex_enter(&dn->dn_dbufs_mtx); | |
| 809 for (db = list_head(&dn->dn_dbufs); db; db = db_next) { | |
| 810 db_next = list_next(&dn->dn_dbufs, db); | |
| 811 | |
| 6992 | 812 if (db->db_blkid != 0 && db->db_blkid != DB_BONUS_BLKID) { |
| 789 | 813 mutex_exit(&dn->dn_dbufs_mtx); |
|
2445
45c1310316ff
6447381 dnode_free_range() does not handle non-power-of-two blocksizes correctly
ahrens
parents:
2082
diff
changeset
|
814 goto fail; |
| 789 | 815 } |
| 816 } | |
| 817 mutex_exit(&dn->dn_dbufs_mtx); | |
| 818 | |
|
2445
45c1310316ff
6447381 dnode_free_range() does not handle non-power-of-two blocksizes correctly
ahrens
parents:
2082
diff
changeset
|
819 if (ibs && dn->dn_nlevels != 1) |
|
45c1310316ff
6447381 dnode_free_range() does not handle non-power-of-two blocksizes correctly
ahrens
parents:
2082
diff
changeset
|
820 goto fail; |
|
45c1310316ff
6447381 dnode_free_range() does not handle non-power-of-two blocksizes correctly
ahrens
parents:
2082
diff
changeset
|
821 |
| 6992 | 822 /* resize the old block */ |
| 823 err = dbuf_hold_impl(dn, 0, 0, TRUE, FTAG, &db); | |
| 824 if (err == 0) | |
|
1596
2e2377ccbf85
6395371 ASSERT in dmu_tx_count_free: blkid + i < dn->dn_phys->dn_nblkptr
ahrens
parents:
1544
diff
changeset
|
825 dbuf_new_size(db, size, tx); |
| 6992 | 826 else if (err != ENOENT) |
| 827 goto fail; | |
| 789 | 828 |
| 829 dnode_setdblksz(dn, size); | |
|
1596
2e2377ccbf85
6395371 ASSERT in dmu_tx_count_free: blkid + i < dn->dn_phys->dn_nblkptr
ahrens
parents:
1544
diff
changeset
|
830 dnode_setdirty(dn, tx); |
|
2e2377ccbf85
6395371 ASSERT in dmu_tx_count_free: blkid + i < dn->dn_phys->dn_nblkptr
ahrens
parents:
1544
diff
changeset
|
831 dn->dn_next_blksz[tx->tx_txg&TXG_MASK] = size; |
|
2445
45c1310316ff
6447381 dnode_free_range() does not handle non-power-of-two blocksizes correctly
ahrens
parents:
2082
diff
changeset
|
832 if (ibs) { |
|
45c1310316ff
6447381 dnode_free_range() does not handle non-power-of-two blocksizes correctly
ahrens
parents:
2082
diff
changeset
|
833 dn->dn_indblkshift = ibs; |
|
45c1310316ff
6447381 dnode_free_range() does not handle non-power-of-two blocksizes correctly
ahrens
parents:
2082
diff
changeset
|
834 dn->dn_next_indblkshift[tx->tx_txg&TXG_MASK] = ibs; |
|
45c1310316ff
6447381 dnode_free_range() does not handle non-power-of-two blocksizes correctly
ahrens
parents:
2082
diff
changeset
|
835 } |
| 6992 | 836 /* rele after we have fixed the blocksize in the dnode */ |
|
1596
2e2377ccbf85
6395371 ASSERT in dmu_tx_count_free: blkid + i < dn->dn_phys->dn_nblkptr
ahrens
parents:
1544
diff
changeset
|
837 if (db) |
|
2e2377ccbf85
6395371 ASSERT in dmu_tx_count_free: blkid + i < dn->dn_phys->dn_nblkptr
ahrens
parents:
1544
diff
changeset
|
838 dbuf_rele(db, FTAG); |
| 789 | 839 |
| 840 rw_exit(&dn->dn_struct_rwlock); | |
|
2445
45c1310316ff
6447381 dnode_free_range() does not handle non-power-of-two blocksizes correctly
ahrens
parents:
2082
diff
changeset
|
841 return (0); |
|
45c1310316ff
6447381 dnode_free_range() does not handle non-power-of-two blocksizes correctly
ahrens
parents:
2082
diff
changeset
|
842 |
|
45c1310316ff
6447381 dnode_free_range() does not handle non-power-of-two blocksizes correctly
ahrens
parents:
2082
diff
changeset
|
843 fail: |
|
45c1310316ff
6447381 dnode_free_range() does not handle non-power-of-two blocksizes correctly
ahrens
parents:
2082
diff
changeset
|
844 rw_exit(&dn->dn_struct_rwlock); |
|
45c1310316ff
6447381 dnode_free_range() does not handle non-power-of-two blocksizes correctly
ahrens
parents:
2082
diff
changeset
|
845 return (ENOTSUP); |
| 789 | 846 } |
| 847 | |
|
7332
396f25bd1f34
6579975 dnode_new_blkid should look before it locks
Jonathan W Adams <Jonathan.Adams@Sun.COM>
parents:
7049
diff
changeset
|
848 /* read-holding callers must not rely on the lock being continuously held */ |
| 789 | 849 void |
|
7332
396f25bd1f34
6579975 dnode_new_blkid should look before it locks
Jonathan W Adams <Jonathan.Adams@Sun.COM>
parents:
7049
diff
changeset
|
850 dnode_new_blkid(dnode_t *dn, uint64_t blkid, dmu_tx_t *tx, boolean_t have_read) |
| 789 | 851 { |
| 852 uint64_t txgoff = tx->tx_txg & TXG_MASK; | |
|
1596
2e2377ccbf85
6395371 ASSERT in dmu_tx_count_free: blkid + i < dn->dn_phys->dn_nblkptr
ahrens
parents:
1544
diff
changeset
|
853 int epbs, new_nlevels; |
| 789 | 854 uint64_t sz; |
| 855 | |
|
1596
2e2377ccbf85
6395371 ASSERT in dmu_tx_count_free: blkid + i < dn->dn_phys->dn_nblkptr
ahrens
parents:
1544
diff
changeset
|
856 ASSERT(blkid != DB_BONUS_BLKID); |
| 789 | 857 |
|
7332
396f25bd1f34
6579975 dnode_new_blkid should look before it locks
Jonathan W Adams <Jonathan.Adams@Sun.COM>
parents:
7049
diff
changeset
|
858 ASSERT(have_read ? |
|
396f25bd1f34
6579975 dnode_new_blkid should look before it locks
Jonathan W Adams <Jonathan.Adams@Sun.COM>
parents:
7049
diff
changeset
|
859 RW_READ_HELD(&dn->dn_struct_rwlock) : |
|
396f25bd1f34
6579975 dnode_new_blkid should look before it locks
Jonathan W Adams <Jonathan.Adams@Sun.COM>
parents:
7049
diff
changeset
|
860 RW_WRITE_HELD(&dn->dn_struct_rwlock)); |
|
396f25bd1f34
6579975 dnode_new_blkid should look before it locks
Jonathan W Adams <Jonathan.Adams@Sun.COM>
parents:
7049
diff
changeset
|
861 |
|
396f25bd1f34
6579975 dnode_new_blkid should look before it locks
Jonathan W Adams <Jonathan.Adams@Sun.COM>
parents:
7049
diff
changeset
|
862 /* |
|
396f25bd1f34
6579975 dnode_new_blkid should look before it locks
Jonathan W Adams <Jonathan.Adams@Sun.COM>
parents:
7049
diff
changeset
|
863 * if we have a read-lock, check to see if we need to do any work |
|
396f25bd1f34
6579975 dnode_new_blkid should look before it locks
Jonathan W Adams <Jonathan.Adams@Sun.COM>
parents:
7049
diff
changeset
|
864 * before upgrading to a write-lock. |
|
396f25bd1f34
6579975 dnode_new_blkid should look before it locks
Jonathan W Adams <Jonathan.Adams@Sun.COM>
parents:
7049
diff
changeset
|
865 */ |
|
396f25bd1f34
6579975 dnode_new_blkid should look before it locks
Jonathan W Adams <Jonathan.Adams@Sun.COM>
parents:
7049
diff
changeset
|
866 if (have_read) { |
|
396f25bd1f34
6579975 dnode_new_blkid should look before it locks
Jonathan W Adams <Jonathan.Adams@Sun.COM>
parents:
7049
diff
changeset
|
867 if (blkid <= dn->dn_maxblkid) |
|
396f25bd1f34
6579975 dnode_new_blkid should look before it locks
Jonathan W Adams <Jonathan.Adams@Sun.COM>
parents:
7049
diff
changeset
|
868 return; |
|
396f25bd1f34
6579975 dnode_new_blkid should look before it locks
Jonathan W Adams <Jonathan.Adams@Sun.COM>
parents:
7049
diff
changeset
|
869 |
|
396f25bd1f34
6579975 dnode_new_blkid should look before it locks
Jonathan W Adams <Jonathan.Adams@Sun.COM>
parents:
7049
diff
changeset
|
870 if (!rw_tryupgrade(&dn->dn_struct_rwlock)) { |
|
396f25bd1f34
6579975 dnode_new_blkid should look before it locks
Jonathan W Adams <Jonathan.Adams@Sun.COM>
parents:
7049
diff
changeset
|
871 rw_exit(&dn->dn_struct_rwlock); |
|
396f25bd1f34
6579975 dnode_new_blkid should look before it locks
Jonathan W Adams <Jonathan.Adams@Sun.COM>
parents:
7049
diff
changeset
|
872 rw_enter(&dn->dn_struct_rwlock, RW_WRITER); |
|
396f25bd1f34
6579975 dnode_new_blkid should look before it locks
Jonathan W Adams <Jonathan.Adams@Sun.COM>
parents:
7049
diff
changeset
|
873 } |
| 789 | 874 } |
| 875 | |
|
1596
2e2377ccbf85
6395371 ASSERT in dmu_tx_count_free: blkid + i < dn->dn_phys->dn_nblkptr
ahrens
parents:
1544
diff
changeset
|
876 if (blkid <= dn->dn_maxblkid) |
|
2e2377ccbf85
6395371 ASSERT in dmu_tx_count_free: blkid + i < dn->dn_phys->dn_nblkptr
ahrens
parents:
1544
diff
changeset
|
877 goto out; |
|
2e2377ccbf85
6395371 ASSERT in dmu_tx_count_free: blkid + i < dn->dn_phys->dn_nblkptr
ahrens
parents:
1544
diff
changeset
|
878 |
|
2e2377ccbf85
6395371 ASSERT in dmu_tx_count_free: blkid + i < dn->dn_phys->dn_nblkptr
ahrens
parents:
1544
diff
changeset
|
879 dn->dn_maxblkid = blkid; |
| 789 | 880 |
| 881 /* | |
|
1596
2e2377ccbf85
6395371 ASSERT in dmu_tx_count_free: blkid + i < dn->dn_phys->dn_nblkptr
ahrens
parents:
1544
diff
changeset
|
882 * Compute the number of levels necessary to support the new maxblkid. |
| 789 | 883 */ |
| 884 new_nlevels = 1; | |
| 885 epbs = dn->dn_indblkshift - SPA_BLKPTRSHIFT; | |
|
1596
2e2377ccbf85
6395371 ASSERT in dmu_tx_count_free: blkid + i < dn->dn_phys->dn_nblkptr
ahrens
parents:
1544
diff
changeset
|
886 for (sz = dn->dn_nblkptr; |
|
2e2377ccbf85
6395371 ASSERT in dmu_tx_count_free: blkid + i < dn->dn_phys->dn_nblkptr
ahrens
parents:
1544
diff
changeset
|
887 sz <= blkid && sz >= dn->dn_nblkptr; sz <<= epbs) |
| 789 | 888 new_nlevels++; |
| 889 | |
|
1596
2e2377ccbf85
6395371 ASSERT in dmu_tx_count_free: blkid + i < dn->dn_phys->dn_nblkptr
ahrens
parents:
1544
diff
changeset
|
890 if (new_nlevels > dn->dn_nlevels) { |
|
2e2377ccbf85
6395371 ASSERT in dmu_tx_count_free: blkid + i < dn->dn_phys->dn_nblkptr
ahrens
parents:
1544
diff
changeset
|
891 int old_nlevels = dn->dn_nlevels; |
|
2e2377ccbf85
6395371 ASSERT in dmu_tx_count_free: blkid + i < dn->dn_phys->dn_nblkptr
ahrens
parents:
1544
diff
changeset
|
892 dmu_buf_impl_t *db; |
|
3547
e396e0a440b1
6512391 DMU should leverage ZIO dependencies to achieve greater parallelism
maybee
parents:
3087
diff
changeset
|
893 list_t *list; |
|
e396e0a440b1
6512391 DMU should leverage ZIO dependencies to achieve greater parallelism
maybee
parents:
3087
diff
changeset
|
894 dbuf_dirty_record_t *new, *dr, *dr_next; |
|
1596
2e2377ccbf85
6395371 ASSERT in dmu_tx_count_free: blkid + i < dn->dn_phys->dn_nblkptr
ahrens
parents:
1544
diff
changeset
|
895 |
|
2e2377ccbf85
6395371 ASSERT in dmu_tx_count_free: blkid + i < dn->dn_phys->dn_nblkptr
ahrens
parents:
1544
diff
changeset
|
896 dn->dn_nlevels = new_nlevels; |
|
2e2377ccbf85
6395371 ASSERT in dmu_tx_count_free: blkid + i < dn->dn_phys->dn_nblkptr
ahrens
parents:
1544
diff
changeset
|
897 |
|
2e2377ccbf85
6395371 ASSERT in dmu_tx_count_free: blkid + i < dn->dn_phys->dn_nblkptr
ahrens
parents:
1544
diff
changeset
|
898 ASSERT3U(new_nlevels, >, dn->dn_next_nlevels[txgoff]); |
| 789 | 899 dn->dn_next_nlevels[txgoff] = new_nlevels; |
| 900 | |
|
3547
e396e0a440b1
6512391 DMU should leverage ZIO dependencies to achieve greater parallelism
maybee
parents:
3087
diff
changeset
|
901 /* dirty the left indirects */ |
|
1596
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902 db = dbuf_hold_level(dn, old_nlevels, 0, FTAG); |
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903 new = dbuf_dirty(db, tx); |
| 1544 | 904 dbuf_rele(db, FTAG); |
|
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905 |
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906 /* transfer the dirty records to the new indirect */ |
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907 mutex_enter(&dn->dn_mtx); |
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908 mutex_enter(&new->dt.di.dr_mtx); |
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909 list = &dn->dn_dirty_records[txgoff]; |
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910 for (dr = list_head(list); dr; dr = dr_next) { |
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911 dr_next = list_next(&dn->dn_dirty_records[txgoff], dr); |
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912 if (dr->dr_dbuf->db_level != new_nlevels-1 && |
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913 dr->dr_dbuf->db_blkid != DB_BONUS_BLKID) { |
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914 ASSERT(dr->dr_dbuf->db_level == old_nlevels-1); |
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915 list_remove(&dn->dn_dirty_records[txgoff], dr); |
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916 list_insert_tail(&new->dt.di.dr_children, dr); |
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917 dr->dr_parent = new; |
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918 } |
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919 } |
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920 mutex_exit(&new->dt.di.dr_mtx); |
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921 mutex_exit(&dn->dn_mtx); |
| 789 | 922 } |
| 923 | |
| 924 out: | |
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925 if (have_read) |
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926 rw_downgrade(&dn->dn_struct_rwlock); |
| 789 | 927 } |
| 928 | |
| 929 void | |
| 930 dnode_clear_range(dnode_t *dn, uint64_t blkid, uint64_t nblks, dmu_tx_t *tx) | |
| 931 { | |
| 932 avl_tree_t *tree = &dn->dn_ranges[tx->tx_txg&TXG_MASK]; | |
| 933 avl_index_t where; | |
| 934 free_range_t *rp; | |
| 935 free_range_t rp_tofind; | |
| 936 uint64_t endblk = blkid + nblks; | |
| 937 | |
| 938 ASSERT(MUTEX_HELD(&dn->dn_mtx)); | |
| 939 ASSERT(nblks <= UINT64_MAX - blkid); /* no overflow */ | |
| 940 | |
| 941 dprintf_dnode(dn, "blkid=%llu nblks=%llu txg=%llu\n", | |
| 942 blkid, nblks, tx->tx_txg); | |
| 943 rp_tofind.fr_blkid = blkid; | |
| 944 rp = avl_find(tree, &rp_tofind, &where); | |
| 945 if (rp == NULL) | |
| 946 rp = avl_nearest(tree, where, AVL_BEFORE); | |
| 947 if (rp == NULL) | |
| 948 rp = avl_nearest(tree, where, AVL_AFTER); | |
| 949 | |
| 950 while (rp && (rp->fr_blkid <= blkid + nblks)) { | |
| 951 uint64_t fr_endblk = rp->fr_blkid + rp->fr_nblks; | |
| 952 free_range_t *nrp = AVL_NEXT(tree, rp); | |
| 953 | |
| 954 if (blkid <= rp->fr_blkid && endblk >= fr_endblk) { | |
| 955 /* clear this entire range */ | |
| 956 avl_remove(tree, rp); | |
| 957 kmem_free(rp, sizeof (free_range_t)); | |
| 958 } else if (blkid <= rp->fr_blkid && | |
| 959 endblk > rp->fr_blkid && endblk < fr_endblk) { | |
| 960 /* clear the beginning of this range */ | |
| 961 rp->fr_blkid = endblk; | |
| 962 rp->fr_nblks = fr_endblk - endblk; | |
| 963 } else if (blkid > rp->fr_blkid && blkid < fr_endblk && | |
| 964 endblk >= fr_endblk) { | |
| 965 /* clear the end of this range */ | |
| 966 rp->fr_nblks = blkid - rp->fr_blkid; | |
| 967 } else if (blkid > rp->fr_blkid && endblk < fr_endblk) { | |
| 968 /* clear a chunk out of this range */ | |
| 969 free_range_t *new_rp = | |
| 970 kmem_alloc(sizeof (free_range_t), KM_SLEEP); | |
| 971 | |
| 972 new_rp->fr_blkid = endblk; | |
| 973 new_rp->fr_nblks = fr_endblk - endblk; | |
| 974 avl_insert_here(tree, new_rp, rp, AVL_AFTER); | |
| 975 rp->fr_nblks = blkid - rp->fr_blkid; | |
| 976 } | |
| 977 /* there may be no overlap */ | |
| 978 rp = nrp; | |
| 979 } | |
| 980 } | |
| 981 | |
| 982 void | |
| 983 dnode_free_range(dnode_t *dn, uint64_t off, uint64_t len, dmu_tx_t *tx) | |
| 984 { | |
| 985 dmu_buf_impl_t *db; | |
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986 uint64_t blkoff, blkid, nblks; |
| 6992 | 987 int blksz, blkshift, head, tail; |
| 789 | 988 int trunc = FALSE; |
| 6992 | 989 int epbs; |
| 789 | 990 |
| 991 rw_enter(&dn->dn_struct_rwlock, RW_WRITER); | |
| 992 blksz = dn->dn_datablksz; | |
| 6992 | 993 blkshift = dn->dn_datablkshift; |
| 994 epbs = dn->dn_indblkshift - SPA_BLKPTRSHIFT; | |
| 789 | 995 |
| 996 if (len == -1ULL) { | |
| 997 len = UINT64_MAX - off; | |
| 998 trunc = TRUE; | |
| 999 } | |
| 1000 | |
| 1001 /* | |
| 1002 * First, block align the region to free: | |
| 1003 */ | |
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1004 if (ISP2(blksz)) { |
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1005 head = P2NPHASE(off, blksz); |
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1006 blkoff = P2PHASE(off, blksz); |
| 6992 | 1007 if ((off >> blkshift) > dn->dn_maxblkid) |
| 1008 goto out; | |
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1009 } else { |
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1010 ASSERT(dn->dn_maxblkid == 0); |
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1011 if (off == 0 && len >= blksz) { |
| 6992 | 1012 /* Freeing the whole block; fast-track this request */ |
| 1013 blkid = 0; | |
| 1014 nblks = 1; | |
| 1015 goto done; | |
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1016 } else if (off >= blksz) { |
| 6992 | 1017 /* Freeing past end-of-data */ |
| 1018 goto out; | |
| 789 | 1019 } else { |
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1020 /* Freeing part of the block. */ |
| 789 | 1021 head = blksz - off; |
| 1022 ASSERT3U(head, >, 0); | |
| 1023 } | |
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1024 blkoff = off; |
| 789 | 1025 } |
| 1026 /* zero out any partial block data at the start of the range */ | |
| 1027 if (head) { | |
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1028 ASSERT3U(blkoff + head, ==, blksz); |
| 789 | 1029 if (len < head) |
| 1030 head = len; | |
| 1031 if (dbuf_hold_impl(dn, 0, dbuf_whichblock(dn, off), TRUE, | |
| 1032 FTAG, &db) == 0) { | |
| 1033 caddr_t data; | |
| 1034 | |
| 1035 /* don't dirty if it isn't on disk and isn't dirty */ | |
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1036 if (db->db_last_dirty || |
| 789 | 1037 (db->db_blkptr && !BP_IS_HOLE(db->db_blkptr))) { |
| 1038 rw_exit(&dn->dn_struct_rwlock); | |
| 1039 dbuf_will_dirty(db, tx); | |
| 1040 rw_enter(&dn->dn_struct_rwlock, RW_WRITER); | |
| 1041 data = db->db.db_data; | |
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1042 bzero(data + blkoff, head); |
| 789 | 1043 } |
| 1544 | 1044 dbuf_rele(db, FTAG); |
| 789 | 1045 } |
| 1046 off += head; | |
| 1047 len -= head; | |
| 1048 } | |
| 1049 | |
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1050 /* If the range was less than one block, we're done */ |
| 6992 | 1051 if (len == 0) |
| 1052 goto out; | |
| 1053 | |
| 1054 /* If the remaining range is past end of file, we're done */ | |
| 1055 if ((off >> blkshift) > dn->dn_maxblkid) | |
| 1056 goto out; | |
| 1057 | |
|
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1058 ASSERT(ISP2(blksz)); |
| 6992 | 1059 if (trunc) |
| 1060 tail = 0; | |
| 1061 else | |
| 1062 tail = P2PHASE(len, blksz); | |
| 1063 | |
| 1064 ASSERT3U(P2PHASE(off, blksz), ==, 0); | |
| 1065 /* zero out any partial block data at the end of the range */ | |
| 1066 if (tail) { | |
| 1067 if (len < tail) | |
| 1068 tail = len; | |
| 1069 if (dbuf_hold_impl(dn, 0, dbuf_whichblock(dn, off+len), | |
| 1070 TRUE, FTAG, &db) == 0) { | |
| 1071 /* don't dirty if not on disk and not dirty */ | |
| 1072 if (db->db_last_dirty || | |
| 1073 (db->db_blkptr && !BP_IS_HOLE(db->db_blkptr))) { | |
| 1074 rw_exit(&dn->dn_struct_rwlock); | |
| 1075 dbuf_will_dirty(db, tx); | |
| 1076 rw_enter(&dn->dn_struct_rwlock, RW_WRITER); | |
| 1077 bzero(db->db.db_data, tail); | |
| 1078 } | |
| 1079 dbuf_rele(db, FTAG); | |
| 1080 } | |
| 1081 len -= tail; | |
| 1082 } | |
| 1083 | |
| 1084 /* If the range did not include a full block, we are done */ | |
| 1085 if (len == 0) | |
| 789 | 1086 goto out; |
| 1087 | |
| 6992 | 1088 ASSERT(IS_P2ALIGNED(off, blksz)); |
| 1089 ASSERT(trunc || IS_P2ALIGNED(len, blksz)); | |
| 1090 blkid = off >> blkshift; | |
| 1091 nblks = len >> blkshift; | |
| 1092 if (trunc) | |
| 1093 nblks += 1; | |
|
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|
1094 |
| 6992 | 1095 /* |
| 1096 * Read in and mark all the level-1 indirects dirty, | |
| 1097 * so that they will stay in memory until syncing phase. | |
|
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1098 * Always dirty the first and last indirect to make sure |
|
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|
1099 * we dirty all the partial indirects. |
| 6992 | 1100 */ |
| 1101 if (dn->dn_nlevels > 1) { | |
| 1102 uint64_t i, first, last; | |
| 1103 int shift = epbs + dn->dn_datablkshift; | |
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1104 |
| 6992 | 1105 first = blkid >> epbs; |
|
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1106 if (db = dbuf_hold_level(dn, 1, first, FTAG)) { |
|
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|
1107 dbuf_will_dirty(db, tx); |
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1108 dbuf_rele(db, FTAG); |
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1109 } |
| 6992 | 1110 if (trunc) |
| 1111 last = dn->dn_maxblkid >> epbs; | |
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1112 else |
| 6992 | 1113 last = (blkid + nblks - 1) >> epbs; |
|
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1114 if (last > first && (db = dbuf_hold_level(dn, 1, last, FTAG))) { |
|
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|
1115 dbuf_will_dirty(db, tx); |
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1116 dbuf_rele(db, FTAG); |
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1117 } |
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1118 for (i = first + 1; i < last; i++) { |
| 6992 | 1119 uint64_t ibyte = i << shift; |
| 1120 int err; | |
| 789 | 1121 |
| 6992 | 1122 err = dnode_next_offset(dn, |
| 1123 DNODE_FIND_HAVELOCK, &ibyte, 1, 1, 0); | |
| 1124 i = ibyte >> shift; | |
|
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1125 if (err == ESRCH || i >= last) |
| 6992 | 1126 break; |
| 1127 ASSERT(err == 0); | |
| 1128 db = dbuf_hold_level(dn, 1, i, FTAG); | |
| 1129 if (db) { | |
| 1130 dbuf_will_dirty(db, tx); | |
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1131 dbuf_rele(db, FTAG); |
| 789 | 1132 } |
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1133 } |
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1134 } |
| 6992 | 1135 done: |
| 1136 /* | |
| 1137 * Add this range to the dnode range list. | |
| 1138 * We will finish up this free operation in the syncing phase. | |
| 1139 */ | |
| 789 | 1140 mutex_enter(&dn->dn_mtx); |
| 1141 dnode_clear_range(dn, blkid, nblks, tx); | |
| 1142 { | |
| 1143 free_range_t *rp, *found; | |
| 1144 avl_index_t where; | |
| 1145 avl_tree_t *tree = &dn->dn_ranges[tx->tx_txg&TXG_MASK]; | |
| 1146 | |
| 1147 /* Add new range to dn_ranges */ | |
| 1148 rp = kmem_alloc(sizeof (free_range_t), KM_SLEEP); | |
| 1149 rp->fr_blkid = blkid; | |
| 1150 rp->fr_nblks = nblks; | |
| 1151 found = avl_find(tree, rp, &where); | |
| 1152 ASSERT(found == NULL); | |
| 1153 avl_insert(tree, rp, where); | |
| 1154 dprintf_dnode(dn, "blkid=%llu nblks=%llu txg=%llu\n", | |
| 1155 blkid, nblks, tx->tx_txg); | |
| 1156 } | |
| 1157 mutex_exit(&dn->dn_mtx); | |
| 1158 | |
| 6992 | 1159 dbuf_free_range(dn, blkid, blkid + nblks - 1, tx); |
| 789 | 1160 dnode_setdirty(dn, tx); |
| 1161 out: | |
| 6992 | 1162 if (trunc && dn->dn_maxblkid >= (off >> blkshift)) |
| 1163 dn->dn_maxblkid = (off >> blkshift ? (off >> blkshift) - 1 : 0); | |
| 1164 | |
| 789 | 1165 rw_exit(&dn->dn_struct_rwlock); |
| 1166 } | |
| 1167 | |
| 1168 /* return TRUE if this blkid was freed in a recent txg, or FALSE if it wasn't */ | |
| 1169 uint64_t | |
| 1170 dnode_block_freed(dnode_t *dn, uint64_t blkid) | |
| 1171 { | |
| 1172 free_range_t range_tofind; | |
| 1173 void *dp = spa_get_dsl(dn->dn_objset->os_spa); | |
| 1174 int i; | |
| 1175 | |
| 1176 if (blkid == DB_BONUS_BLKID) | |
| 1177 return (FALSE); | |
| 1178 | |
| 1179 /* | |
| 1180 * If we're in the process of opening the pool, dp will not be | |
| 1181 * set yet, but there shouldn't be anything dirty. | |
| 1182 */ | |
| 1183 if (dp == NULL) | |
| 1184 return (FALSE); | |
| 1185 | |
| 1186 if (dn->dn_free_txg) | |
| 1187 return (TRUE); | |
| 1188 | |
| 1189 /* | |
| 1190 * If dn_datablkshift is not set, then there's only a single | |
| 1191 * block, in which case there will never be a free range so it | |
| 1192 * won't matter. | |
| 1193 */ | |
| 1194 range_tofind.fr_blkid = blkid; | |
| 1195 mutex_enter(&dn->dn_mtx); | |
| 1196 for (i = 0; i < TXG_SIZE; i++) { | |
| 1197 free_range_t *range_found; | |
| 1198 avl_index_t idx; | |
| 1199 | |
| 1200 range_found = avl_find(&dn->dn_ranges[i], &range_tofind, &idx); | |
| 1201 if (range_found) { | |
| 1202 ASSERT(range_found->fr_nblks > 0); | |
| 1203 break; | |
| 1204 } | |
| 1205 range_found = avl_nearest(&dn->dn_ranges[i], idx, AVL_BEFORE); | |
| 1206 if (range_found && | |
| 1207 range_found->fr_blkid + range_found->fr_nblks > blkid) | |
| 1208 break; | |
| 1209 } | |
| 1210 mutex_exit(&dn->dn_mtx); | |
| 1211 return (i < TXG_SIZE); | |
| 1212 } | |
| 1213 | |
| 1214 /* call from syncing context when we actually write/free space for this dnode */ | |
| 1215 void | |
| 2082 | 1216 dnode_diduse_space(dnode_t *dn, int64_t delta) |
| 789 | 1217 { |
| 2082 | 1218 uint64_t space; |
| 1219 dprintf_dnode(dn, "dn=%p dnp=%p used=%llu delta=%lld\n", | |
| 789 | 1220 dn, dn->dn_phys, |
| 2082 | 1221 (u_longlong_t)dn->dn_phys->dn_used, |
| 1222 (longlong_t)delta); | |
| 789 | 1223 |
| 1224 mutex_enter(&dn->dn_mtx); | |
| 2082 | 1225 space = DN_USED_BYTES(dn->dn_phys); |
| 1226 if (delta > 0) { | |
| 1227 ASSERT3U(space + delta, >=, space); /* no overflow */ | |
| 789 | 1228 } else { |
| 2082 | 1229 ASSERT3U(space, >=, -delta); /* no underflow */ |
| 1230 } | |
| 1231 space += delta; | |
| 4577 | 1232 if (spa_version(dn->dn_objset->os_spa) < SPA_VERSION_DNODE_BYTES) { |
| 2082 | 1233 ASSERT((dn->dn_phys->dn_flags & DNODE_FLAG_USED_BYTES) == 0); |
| 1234 ASSERT3U(P2PHASE(space, 1<<DEV_BSHIFT), ==, 0); | |
| 1235 dn->dn_phys->dn_used = space >> DEV_BSHIFT; | |
| 1236 } else { | |
| 1237 dn->dn_phys->dn_used = space; | |
| 1238 dn->dn_phys->dn_flags |= DNODE_FLAG_USED_BYTES; | |
| 789 | 1239 } |
| 1240 mutex_exit(&dn->dn_mtx); | |
| 1241 } | |
| 1242 | |
| 1243 /* | |
| 1244 * Call when we think we're going to write/free space in open context. | |
| 1245 * Be conservative (ie. OK to write less than this or free more than | |
| 1246 * this, but don't write more or free less). | |
| 1247 */ | |
| 1248 void | |
| 1249 dnode_willuse_space(dnode_t *dn, int64_t space, dmu_tx_t *tx) | |
| 1250 { | |
| 1251 objset_impl_t *os = dn->dn_objset; | |
| 1252 dsl_dataset_t *ds = os->os_dsl_dataset; | |
| 1253 | |
| 1254 if (space > 0) | |
| 1255 space = spa_get_asize(os->os_spa, space); | |
| 1256 | |
| 1257 if (ds) | |
| 1258 dsl_dir_willuse_space(ds->ds_dir, space, tx); | |
| 1259 | |
| 1260 dmu_tx_willuse_space(tx, space); | |
| 1261 } | |
| 1262 | |
| 1263 static int | |
| 6992 | 1264 dnode_next_offset_level(dnode_t *dn, int flags, uint64_t *offset, |
|
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1265 int lvl, uint64_t blkfill, uint64_t txg) |
| 789 | 1266 { |
| 1267 dmu_buf_impl_t *db = NULL; | |
| 1268 void *data = NULL; | |
| 1269 uint64_t epbs = dn->dn_phys->dn_indblkshift - SPA_BLKPTRSHIFT; | |
| 1270 uint64_t epb = 1ULL << epbs; | |
| 1271 uint64_t minfill, maxfill; | |
| 6992 | 1272 boolean_t hole; |
| 1273 int i, inc, error, span; | |
| 789 | 1274 |
| 1275 dprintf("probing object %llu offset %llx level %d of %u\n", | |
| 1276 dn->dn_object, *offset, lvl, dn->dn_phys->dn_nlevels); | |
| 1277 | |
| 6992 | 1278 hole = flags & DNODE_FIND_HOLE; |
| 1279 inc = (flags & DNODE_FIND_BACKWARDS) ? -1 : 1; | |
|
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1280 ASSERT(txg == 0 || !hole); |
| 6992 | 1281 |
| 789 | 1282 if (lvl == dn->dn_phys->dn_nlevels) { |
| 1283 error = 0; | |
| 1284 epb = dn->dn_phys->dn_nblkptr; | |
| 1285 data = dn->dn_phys->dn_blkptr; | |
| 1286 } else { | |
| 1287 uint64_t blkid = dbuf_whichblock(dn, *offset) >> (epbs * lvl); | |
| 1288 error = dbuf_hold_impl(dn, lvl, blkid, TRUE, FTAG, &db); | |
| 1289 if (error) { | |
|
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1290 if (error != ENOENT) |
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1291 return (error); |
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1292 if (hole) |
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1293 return (0); |
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1294 /* |
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1295 * This can only happen when we are searching up |
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1296 * the block tree for data. We don't really need to |
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1297 * adjust the offset, as we will just end up looking |
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1298 * at the pointer to this block in its parent, and its |
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1299 * going to be unallocated, so we will skip over it. |
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1300 */ |
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1301 return (ESRCH); |
| 789 | 1302 } |
|
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1303 error = dbuf_read(db, NULL, DB_RF_CANFAIL | DB_RF_HAVESTRUCT); |
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1304 if (error) { |
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1305 dbuf_rele(db, FTAG); |
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1306 return (error); |
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1307 } |
| 789 | 1308 data = db->db.db_data; |
| 1309 } | |
| 1310 | |
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1311 if (db && txg && |
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1312 (db->db_blkptr == NULL || db->db_blkptr->blk_birth <= txg)) { |
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1313 /* |
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1314 * This can only happen when we are searching up the tree |
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1315 * and these conditions mean that we need to keep climbing. |
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1316 */ |
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1317 error = ESRCH; |
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1318 } else if (lvl == 0) { |
| 789 | 1319 dnode_phys_t *dnp = data; |
| 1320 span = DNODE_SHIFT; | |
| 1321 ASSERT(dn->dn_type == DMU_OT_DNODE); | |
| 1322 | |
| 6992 | 1323 for (i = (*offset >> span) & (blkfill - 1); |
| 1324 i >= 0 && i < blkfill; i += inc) { | |
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1325 boolean_t newcontents = B_TRUE; |
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1326 if (txg) { |
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1327 int j; |
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1328 newcontents = B_FALSE; |
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1329 for (j = 0; j < dnp[i].dn_nblkptr; j++) { |
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1330 if (dnp[i].dn_blkptr[j].blk_birth > txg) |
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1331 newcontents = B_TRUE; |
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1332 } |
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1333 } |
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1334 if (!dnp[i].dn_type == hole && newcontents) |
| 789 | 1335 break; |
| 6992 | 1336 *offset += (1ULL << span) * inc; |
| 789 | 1337 } |
| 6992 | 1338 if (i < 0 || i == blkfill) |
| 789 | 1339 error = ESRCH; |
| 1340 } else { | |
| 1341 blkptr_t *bp = data; | |
| 1342 span = (lvl - 1) * epbs + dn->dn_datablkshift; | |
| 1343 minfill = 0; | |
| 1344 maxfill = blkfill << ((lvl - 1) * epbs); | |
| 1345 | |
| 1346 if (hole) | |
| 1347 maxfill--; | |
| 1348 else | |
| 1349 minfill++; | |
| 1350 | |
| 1351 for (i = (*offset >> span) & ((1ULL << epbs) - 1); | |
| 6992 | 1352 i >= 0 && i < epb; i += inc) { |
| 789 | 1353 if (bp[i].blk_fill >= minfill && |
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1354 bp[i].blk_fill <= maxfill && |
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1355 (hole || bp[i].blk_birth > txg)) |
| 789 | 1356 break; |
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1357 if (inc < 0 && *offset < (1ULL << span)) |
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1358 *offset = 0; |
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1359 else |
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1360 *offset += (1ULL << span) * inc; |
| 789 | 1361 } |
| 6992 | 1362 if (i < 0 || i == epb) |
| 789 | 1363 error = ESRCH; |
| 1364 } | |
| 1365 | |
| 1366 if (db) | |
| 1544 | 1367 dbuf_rele(db, FTAG); |
| 789 | 1368 |
| 1369 return (error); | |
| 1370 } | |
| 1371 | |
| 1372 /* | |
| 1373 * Find the next hole, data, or sparse region at or after *offset. | |
| 1374 * The value 'blkfill' tells us how many items we expect to find | |
| 1375 * in an L0 data block; this value is 1 for normal objects, | |
| 1376 * DNODES_PER_BLOCK for the meta dnode, and some fraction of | |
| 1377 * DNODES_PER_BLOCK when searching for sparse regions thereof. | |
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1378 * |
| 789 | 1379 * Examples: |
| 1380 * | |
| 6992 | 1381 * dnode_next_offset(dn, flags, offset, 1, 1, 0); |
| 1382 * Finds the next/previous hole/data in a file. | |
| 789 | 1383 * Used in dmu_offset_next(). |
| 1384 * | |
| 6992 | 1385 * dnode_next_offset(mdn, flags, offset, 0, DNODES_PER_BLOCK, txg); |
| 789 | 1386 * Finds the next free/allocated dnode an objset's meta-dnode. |
|
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1387 * Only finds objects that have new contents since txg (ie. |
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1388 * bonus buffer changes and content removal are ignored). |
| 789 | 1389 * Used in dmu_object_next(). |
| 1390 * | |
| 6992 | 1391 * dnode_next_offset(mdn, DNODE_FIND_HOLE, offset, 2, DNODES_PER_BLOCK >> 2, 0); |
| 789 | 1392 * Finds the next L2 meta-dnode bp that's at most 1/4 full. |
| 1393 * Used in dmu_object_alloc(). | |
| 1394 */ | |
| 1395 int | |
| 6992 | 1396 dnode_next_offset(dnode_t *dn, int flags, uint64_t *offset, |
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1397 int minlvl, uint64_t blkfill, uint64_t txg) |
| 789 | 1398 { |
| 6992 | 1399 uint64_t initial_offset = *offset; |
| 789 | 1400 int lvl, maxlvl; |
| 1401 int error = 0; | |
| 1402 | |
| 6992 | 1403 if (!(flags & DNODE_FIND_HAVELOCK)) |
| 1404 rw_enter(&dn->dn_struct_rwlock, RW_READER); | |
| 789 | 1405 |
| 1406 if (dn->dn_phys->dn_nlevels == 0) { | |
| 6992 | 1407 error = ESRCH; |
| 1408 goto out; | |
| 789 | 1409 } |
| 1410 | |
| 1411 if (dn->dn_datablkshift == 0) { | |
| 1412 if (*offset < dn->dn_datablksz) { | |
| 6992 | 1413 if (flags & DNODE_FIND_HOLE) |
| 789 | 1414 *offset = dn->dn_datablksz; |
| 1415 } else { | |
| 1416 error = ESRCH; | |
| 1417 } | |
| 6992 | 1418 goto out; |
| 789 | 1419 } |
| 1420 | |
| 1421 maxlvl = dn->dn_phys->dn_nlevels; | |
| 1422 | |
| 1423 for (lvl = minlvl; lvl <= maxlvl; lvl++) { | |
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1424 error = dnode_next_offset_level(dn, |
| 6992 | 1425 flags, offset, lvl, blkfill, txg); |
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1426 if (error != ESRCH) |
| 789 | 1427 break; |
| 1428 } | |
| 1429 | |
| 6992 | 1430 while (error == 0 && --lvl >= minlvl) { |
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1431 error = dnode_next_offset_level(dn, |
| 6992 | 1432 flags, offset, lvl, blkfill, txg); |
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1433 } |
| 789 | 1434 |
| 6992 | 1435 if (error == 0 && (flags & DNODE_FIND_BACKWARDS ? |
| 1436 initial_offset < *offset : initial_offset > *offset)) | |
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1437 error = ESRCH; |
| 6992 | 1438 out: |
| 1439 if (!(flags & DNODE_FIND_HAVELOCK)) | |
| 1440 rw_exit(&dn->dn_struct_rwlock); | |
| 789 | 1441 |
| 1442 return (error); | |
| 1443 } |