Mercurial > illumos > illumos-gate
annotate usr/src/uts/common/fs/zfs/dnode.c @ 12178:93ec1371f750
6939983 assertion failed: zap_count(os, DMU_USERUSED_OBJECT, &count) != 0||count == 0, in dsl_dataset.c
6942276 remove symlink upgrade code
6943284 sa_attr_iter() can use uninitialized value of length_start
6942045 zoneadm -z <zone> halt hangs after manipulation of xattrs
| author | Mark Shellenbaum <Mark.Shellenbaum@Sun.COM> |
|---|---|
| date | Mon, 19 Apr 2010 10:21:23 -0600 |
| parents | 575ffe1e978d |
| children | 3e9af067a727 |
| 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 (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. |
| 789 | 23 */ |
| 24 | |
| 25 #include <sys/zfs_context.h> | |
| 26 #include <sys/dbuf.h> | |
| 27 #include <sys/dnode.h> | |
| 28 #include <sys/dmu.h> | |
| 29 #include <sys/dmu_impl.h> | |
| 30 #include <sys/dmu_tx.h> | |
| 31 #include <sys/dmu_objset.h> | |
| 32 #include <sys/dsl_dir.h> | |
| 33 #include <sys/dsl_dataset.h> | |
| 34 #include <sys/spa.h> | |
| 35 #include <sys/zio.h> | |
| 36 #include <sys/dmu_zfetch.h> | |
| 37 | |
| 38 static int free_range_compar(const void *node1, const void *node2); | |
| 39 | |
| 40 static kmem_cache_t *dnode_cache; | |
| 41 | |
| 42 static dnode_phys_t dnode_phys_zero; | |
| 43 | |
| 44 int zfs_default_bs = SPA_MINBLOCKSHIFT; | |
| 45 int zfs_default_ibs = DN_MAX_INDBLKSHIFT; | |
| 46 | |
| 47 /* ARGSUSED */ | |
| 48 static int | |
| 49 dnode_cons(void *arg, void *unused, int kmflag) | |
| 50 { | |
| 51 int i; | |
| 52 dnode_t *dn = arg; | |
| 53 bzero(dn, sizeof (dnode_t)); | |
| 54 | |
| 55 rw_init(&dn->dn_struct_rwlock, NULL, RW_DEFAULT, NULL); | |
| 56 mutex_init(&dn->dn_mtx, NULL, MUTEX_DEFAULT, NULL); | |
| 57 mutex_init(&dn->dn_dbufs_mtx, NULL, MUTEX_DEFAULT, NULL); | |
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58 cv_init(&dn->dn_notxholds, NULL, CV_DEFAULT, NULL); |
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59 |
| 789 | 60 refcount_create(&dn->dn_holds); |
| 61 refcount_create(&dn->dn_tx_holds); | |
| 62 | |
| 63 for (i = 0; i < TXG_SIZE; i++) { | |
| 64 avl_create(&dn->dn_ranges[i], free_range_compar, | |
| 65 sizeof (free_range_t), | |
| 66 offsetof(struct free_range, fr_node)); | |
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67 list_create(&dn->dn_dirty_records[i], |
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68 sizeof (dbuf_dirty_record_t), |
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69 offsetof(dbuf_dirty_record_t, dr_dirty_node)); |
| 789 | 70 } |
| 71 | |
| 72 list_create(&dn->dn_dbufs, sizeof (dmu_buf_impl_t), | |
| 73 offsetof(dmu_buf_impl_t, db_link)); | |
| 74 | |
| 75 return (0); | |
| 76 } | |
| 77 | |
| 78 /* ARGSUSED */ | |
| 79 static void | |
| 80 dnode_dest(void *arg, void *unused) | |
| 81 { | |
| 82 int i; | |
| 83 dnode_t *dn = arg; | |
| 84 | |
| 85 rw_destroy(&dn->dn_struct_rwlock); | |
| 86 mutex_destroy(&dn->dn_mtx); | |
| 87 mutex_destroy(&dn->dn_dbufs_mtx); | |
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88 cv_destroy(&dn->dn_notxholds); |
| 789 | 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); | |
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158 ASSERT(DMU_OBJECT_IS_SPECIAL(dn->dn_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 } | |
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212 |
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213 /* Swap SPILL block if we have one */ |
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214 if (dnp->dn_flags & DNODE_FLAG_SPILL_BLKPTR) |
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215 byteswap_uint64_array(&dnp->dn_spill, sizeof (blkptr_t)); |
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216 |
| 789 | 217 } |
| 218 | |
| 219 void | |
| 220 dnode_buf_byteswap(void *vbuf, size_t size) | |
| 221 { | |
| 222 dnode_phys_t *buf = vbuf; | |
| 223 int i; | |
| 224 | |
| 225 ASSERT3U(sizeof (dnode_phys_t), ==, (1<<DNODE_SHIFT)); | |
| 226 ASSERT((size & (sizeof (dnode_phys_t)-1)) == 0); | |
| 227 | |
| 228 size >>= DNODE_SHIFT; | |
| 229 for (i = 0; i < size; i++) { | |
| 230 dnode_byteswap(buf); | |
| 231 buf++; | |
| 232 } | |
| 233 } | |
| 234 | |
| 235 static int | |
| 236 free_range_compar(const void *node1, const void *node2) | |
| 237 { | |
| 238 const free_range_t *rp1 = node1; | |
| 239 const free_range_t *rp2 = node2; | |
| 240 | |
| 241 if (rp1->fr_blkid < rp2->fr_blkid) | |
| 242 return (-1); | |
| 243 else if (rp1->fr_blkid > rp2->fr_blkid) | |
| 244 return (1); | |
| 245 else return (0); | |
| 246 } | |
| 247 | |
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248 void |
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249 dnode_setbonuslen(dnode_t *dn, int newsize, dmu_tx_t *tx) |
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250 { |
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251 ASSERT3U(refcount_count(&dn->dn_holds), >=, 1); |
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252 |
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253 dnode_setdirty(dn, tx); |
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254 rw_enter(&dn->dn_struct_rwlock, RW_WRITER); |
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255 ASSERT3U(newsize, <=, DN_MAX_BONUSLEN - |
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256 (dn->dn_nblkptr-1) * sizeof (blkptr_t)); |
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257 dn->dn_bonuslen = newsize; |
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258 if (newsize == 0) |
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259 dn->dn_next_bonuslen[tx->tx_txg & TXG_MASK] = DN_ZERO_BONUSLEN; |
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260 else |
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261 dn->dn_next_bonuslen[tx->tx_txg & TXG_MASK] = dn->dn_bonuslen; |
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262 rw_exit(&dn->dn_struct_rwlock); |
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263 } |
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264 |
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265 void |
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266 dnode_setbonus_type(dnode_t *dn, dmu_object_type_t newtype, dmu_tx_t *tx) |
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267 { |
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268 ASSERT3U(refcount_count(&dn->dn_holds), >=, 1); |
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269 dnode_setdirty(dn, tx); |
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270 rw_enter(&dn->dn_struct_rwlock, RW_WRITER); |
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271 dn->dn_bonustype = newtype; |
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272 dn->dn_next_bonustype[tx->tx_txg & TXG_MASK] = dn->dn_bonustype; |
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273 rw_exit(&dn->dn_struct_rwlock); |
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274 } |
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275 |
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276 void |
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277 dnode_rm_spill(dnode_t *dn, dmu_tx_t *tx) |
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278 { |
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279 ASSERT3U(refcount_count(&dn->dn_holds), >=, 1); |
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280 ASSERT(RW_WRITE_HELD(&dn->dn_struct_rwlock)); |
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281 dnode_setdirty(dn, tx); |
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282 dn->dn_rm_spillblk[tx->tx_txg&TXG_MASK] = DN_KILL_SPILLBLK; |
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283 dn->dn_have_spill = B_FALSE; |
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284 } |
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285 |
| 789 | 286 static void |
| 287 dnode_setdblksz(dnode_t *dn, int size) | |
| 288 { | |
| 289 ASSERT3U(P2PHASE(size, SPA_MINBLOCKSIZE), ==, 0); | |
| 290 ASSERT3U(size, <=, SPA_MAXBLOCKSIZE); | |
| 291 ASSERT3U(size, >=, SPA_MINBLOCKSIZE); | |
| 292 ASSERT3U(size >> SPA_MINBLOCKSHIFT, <, | |
| 293 1<<(sizeof (dn->dn_phys->dn_datablkszsec) * 8)); | |
| 294 dn->dn_datablksz = size; | |
| 295 dn->dn_datablkszsec = size >> SPA_MINBLOCKSHIFT; | |
| 296 dn->dn_datablkshift = ISP2(size) ? highbit(size - 1) : 0; | |
| 297 } | |
| 298 | |
| 299 static dnode_t * | |
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300 dnode_create(objset_t *os, dnode_phys_t *dnp, dmu_buf_impl_t *db, |
| 789 | 301 uint64_t object) |
| 302 { | |
| 303 dnode_t *dn = kmem_cache_alloc(dnode_cache, KM_SLEEP); | |
| 304 (void) dnode_cons(dn, NULL, 0); /* XXX */ | |
| 305 | |
| 306 dn->dn_objset = os; | |
| 307 dn->dn_object = object; | |
| 308 dn->dn_dbuf = db; | |
| 309 dn->dn_phys = dnp; | |
| 310 | |
| 311 if (dnp->dn_datablkszsec) | |
| 312 dnode_setdblksz(dn, dnp->dn_datablkszsec << SPA_MINBLOCKSHIFT); | |
| 313 dn->dn_indblkshift = dnp->dn_indblkshift; | |
| 314 dn->dn_nlevels = dnp->dn_nlevels; | |
| 315 dn->dn_type = dnp->dn_type; | |
| 316 dn->dn_nblkptr = dnp->dn_nblkptr; | |
| 317 dn->dn_checksum = dnp->dn_checksum; | |
| 318 dn->dn_compress = dnp->dn_compress; | |
| 319 dn->dn_bonustype = dnp->dn_bonustype; | |
| 320 dn->dn_bonuslen = dnp->dn_bonuslen; | |
| 321 dn->dn_maxblkid = dnp->dn_maxblkid; | |
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322 dn->dn_have_spill = ((dnp->dn_flags & DNODE_FLAG_SPILL_BLKPTR) != 0); |
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323 dn->dn_id_flags = 0; |
| 789 | 324 |
| 325 dmu_zfetch_init(&dn->dn_zfetch, dn); | |
| 326 | |
| 327 ASSERT(dn->dn_phys->dn_type < DMU_OT_NUMTYPES); | |
| 328 mutex_enter(&os->os_lock); | |
| 329 list_insert_head(&os->os_dnodes, dn); | |
| 330 mutex_exit(&os->os_lock); | |
| 331 | |
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332 arc_space_consume(sizeof (dnode_t), ARC_SPACE_OTHER); |
| 789 | 333 return (dn); |
| 334 } | |
| 335 | |
| 336 static void | |
| 337 dnode_destroy(dnode_t *dn) | |
| 338 { | |
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339 objset_t *os = dn->dn_objset; |
| 789 | 340 |
| 2885 | 341 #ifdef ZFS_DEBUG |
| 342 int i; | |
| 343 | |
| 344 for (i = 0; i < TXG_SIZE; i++) { | |
| 345 ASSERT(!list_link_active(&dn->dn_dirty_link[i])); | |
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346 ASSERT(NULL == list_head(&dn->dn_dirty_records[i])); |
| 2885 | 347 ASSERT(0 == avl_numnodes(&dn->dn_ranges[i])); |
| 348 } | |
| 349 ASSERT(NULL == list_head(&dn->dn_dbufs)); | |
| 350 #endif | |
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351 ASSERT((dn->dn_id_flags & DN_ID_NEW_EXIST) == 0); |
| 2885 | 352 |
| 789 | 353 mutex_enter(&os->os_lock); |
| 354 list_remove(&os->os_dnodes, dn); | |
| 355 mutex_exit(&os->os_lock); | |
| 356 | |
| 357 if (dn->dn_dirtyctx_firstset) { | |
| 358 kmem_free(dn->dn_dirtyctx_firstset, 1); | |
| 359 dn->dn_dirtyctx_firstset = NULL; | |
| 360 } | |
| 361 dmu_zfetch_rele(&dn->dn_zfetch); | |
| 1544 | 362 if (dn->dn_bonus) { |
| 363 mutex_enter(&dn->dn_bonus->db_mtx); | |
| 364 dbuf_evict(dn->dn_bonus); | |
| 365 dn->dn_bonus = NULL; | |
| 366 } | |
| 789 | 367 kmem_cache_free(dnode_cache, dn); |
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368 arc_space_return(sizeof (dnode_t), ARC_SPACE_OTHER); |
| 789 | 369 } |
| 370 | |
| 371 void | |
| 372 dnode_allocate(dnode_t *dn, dmu_object_type_t ot, int blocksize, int ibs, | |
| 1599 | 373 dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx) |
| 789 | 374 { |
| 375 int i; | |
| 376 | |
| 377 if (blocksize == 0) | |
| 378 blocksize = 1 << zfs_default_bs; | |
| 1402 | 379 else if (blocksize > SPA_MAXBLOCKSIZE) |
| 380 blocksize = SPA_MAXBLOCKSIZE; | |
| 381 else | |
| 382 blocksize = P2ROUNDUP(blocksize, SPA_MINBLOCKSIZE); | |
| 789 | 383 |
| 384 if (ibs == 0) | |
| 385 ibs = zfs_default_ibs; | |
| 386 | |
| 387 ibs = MIN(MAX(ibs, DN_MIN_INDBLKSHIFT), DN_MAX_INDBLKSHIFT); | |
| 388 | |
| 389 dprintf("os=%p obj=%llu txg=%llu blocksize=%d ibs=%d\n", dn->dn_objset, | |
| 390 dn->dn_object, tx->tx_txg, blocksize, ibs); | |
| 391 | |
| 392 ASSERT(dn->dn_type == DMU_OT_NONE); | |
| 393 ASSERT(bcmp(dn->dn_phys, &dnode_phys_zero, sizeof (dnode_phys_t)) == 0); | |
| 394 ASSERT(dn->dn_phys->dn_type == DMU_OT_NONE); | |
| 395 ASSERT(ot != DMU_OT_NONE); | |
| 396 ASSERT3U(ot, <, DMU_OT_NUMTYPES); | |
| 397 ASSERT((bonustype == DMU_OT_NONE && bonuslen == 0) || | |
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398 (bonustype == DMU_OT_SA && bonuslen == 0) || |
| 789 | 399 (bonustype != DMU_OT_NONE && bonuslen != 0)); |
| 400 ASSERT3U(bonustype, <, DMU_OT_NUMTYPES); | |
| 401 ASSERT3U(bonuslen, <=, DN_MAX_BONUSLEN); | |
| 402 ASSERT(dn->dn_type == DMU_OT_NONE); | |
| 403 ASSERT3U(dn->dn_maxblkid, ==, 0); | |
| 404 ASSERT3U(dn->dn_allocated_txg, ==, 0); | |
| 405 ASSERT3U(dn->dn_assigned_txg, ==, 0); | |
| 406 ASSERT(refcount_is_zero(&dn->dn_tx_holds)); | |
| 407 ASSERT3U(refcount_count(&dn->dn_holds), <=, 1); | |
| 408 ASSERT3P(list_head(&dn->dn_dbufs), ==, NULL); | |
| 409 | |
| 410 for (i = 0; i < TXG_SIZE; i++) { | |
| 411 ASSERT3U(dn->dn_next_nlevels[i], ==, 0); | |
| 412 ASSERT3U(dn->dn_next_indblkshift[i], ==, 0); | |
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413 ASSERT3U(dn->dn_next_bonuslen[i], ==, 0); |
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414 ASSERT3U(dn->dn_next_bonustype[i], ==, 0); |
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415 ASSERT3U(dn->dn_rm_spillblk[i], ==, 0); |
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416 ASSERT3U(dn->dn_next_blksz[i], ==, 0); |
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417 ASSERT(!list_link_active(&dn->dn_dirty_link[i])); |
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418 ASSERT3P(list_head(&dn->dn_dirty_records[i]), ==, NULL); |
| 789 | 419 ASSERT3U(avl_numnodes(&dn->dn_ranges[i]), ==, 0); |
| 420 } | |
| 421 | |
| 422 dn->dn_type = ot; | |
| 423 dnode_setdblksz(dn, blocksize); | |
| 424 dn->dn_indblkshift = ibs; | |
| 425 dn->dn_nlevels = 1; | |
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426 if (bonustype == DMU_OT_SA) /* Maximize bonus space for SA */ |
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427 dn->dn_nblkptr = 1; |
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428 else |
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429 dn->dn_nblkptr = 1 + |
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430 ((DN_MAX_BONUSLEN - bonuslen) >> SPA_BLKPTRSHIFT); |
| 789 | 431 dn->dn_bonustype = bonustype; |
| 432 dn->dn_bonuslen = bonuslen; | |
| 433 dn->dn_checksum = ZIO_CHECKSUM_INHERIT; | |
| 434 dn->dn_compress = ZIO_COMPRESS_INHERIT; | |
| 435 dn->dn_dirtyctx = 0; | |
| 436 | |
| 437 dn->dn_free_txg = 0; | |
| 438 if (dn->dn_dirtyctx_firstset) { | |
| 439 kmem_free(dn->dn_dirtyctx_firstset, 1); | |
| 440 dn->dn_dirtyctx_firstset = NULL; | |
| 441 } | |
| 442 | |
| 443 dn->dn_allocated_txg = tx->tx_txg; | |
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444 dn->dn_id_flags = 0; |
| 1599 | 445 |
| 789 | 446 dnode_setdirty(dn, tx); |
| 1599 | 447 dn->dn_next_indblkshift[tx->tx_txg & TXG_MASK] = ibs; |
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448 dn->dn_next_bonuslen[tx->tx_txg & TXG_MASK] = dn->dn_bonuslen; |
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449 dn->dn_next_bonustype[tx->tx_txg & TXG_MASK] = dn->dn_bonustype; |
| 1599 | 450 dn->dn_next_blksz[tx->tx_txg & TXG_MASK] = dn->dn_datablksz; |
| 789 | 451 } |
| 452 | |
| 453 void | |
| 454 dnode_reallocate(dnode_t *dn, dmu_object_type_t ot, int blocksize, | |
| 455 dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx) | |
| 456 { | |
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457 int nblkptr; |
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458 |
| 789 | 459 ASSERT3U(blocksize, >=, SPA_MINBLOCKSIZE); |
| 460 ASSERT3U(blocksize, <=, SPA_MAXBLOCKSIZE); | |
| 461 ASSERT3U(blocksize % SPA_MINBLOCKSIZE, ==, 0); | |
| 1544 | 462 ASSERT(dn->dn_object != DMU_META_DNODE_OBJECT || dmu_tx_private_ok(tx)); |
| 789 | 463 ASSERT(tx->tx_txg != 0); |
| 464 ASSERT((bonustype == DMU_OT_NONE && bonuslen == 0) || | |
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465 (bonustype != DMU_OT_NONE && bonuslen != 0) || |
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466 (bonustype == DMU_OT_SA && bonuslen == 0)); |
| 789 | 467 ASSERT3U(bonustype, <, DMU_OT_NUMTYPES); |
| 468 ASSERT3U(bonuslen, <=, DN_MAX_BONUSLEN); | |
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469 |
| 1544 | 470 /* clean up any unreferenced dbufs */ |
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471 dnode_evict_dbufs(dn); |
| 1544 | 472 |
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473 rw_enter(&dn->dn_struct_rwlock, RW_WRITER); |
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474 dnode_setdirty(dn, tx); |
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475 if (dn->dn_datablksz != blocksize) { |
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476 /* change blocksize */ |
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477 ASSERT(dn->dn_maxblkid == 0 && |
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478 (BP_IS_HOLE(&dn->dn_phys->dn_blkptr[0]) || |
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479 dnode_block_freed(dn, 0))); |
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480 dnode_setdblksz(dn, blocksize); |
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481 dn->dn_next_blksz[tx->tx_txg&TXG_MASK] = blocksize; |
| 789 | 482 } |
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483 if (dn->dn_bonuslen != bonuslen) |
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484 dn->dn_next_bonuslen[tx->tx_txg&TXG_MASK] = bonuslen; |
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485 |
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486 if (bonustype == DMU_OT_SA) /* Maximize bonus space for SA */ |
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487 nblkptr = 1; |
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488 else |
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489 nblkptr = 1 + ((DN_MAX_BONUSLEN - bonuslen) >> SPA_BLKPTRSHIFT); |
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490 if (dn->dn_bonustype != bonustype) |
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491 dn->dn_next_bonustype[tx->tx_txg&TXG_MASK] = bonustype; |
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492 if (dn->dn_nblkptr != nblkptr) |
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493 dn->dn_next_nblkptr[tx->tx_txg&TXG_MASK] = nblkptr; |
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494 if (dn->dn_phys->dn_flags & DNODE_FLAG_SPILL_BLKPTR) { |
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495 dbuf_rm_spill(dn, tx); |
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496 dnode_rm_spill(dn, tx); |
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497 } |
| 789 | 498 rw_exit(&dn->dn_struct_rwlock); |
| 499 | |
| 500 /* change type */ | |
| 501 dn->dn_type = ot; | |
| 502 | |
| 503 /* change bonus size and type */ | |
| 504 mutex_enter(&dn->dn_mtx); | |
| 505 dn->dn_bonustype = bonustype; | |
| 506 dn->dn_bonuslen = bonuslen; | |
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507 dn->dn_nblkptr = nblkptr; |
| 789 | 508 dn->dn_checksum = ZIO_CHECKSUM_INHERIT; |
| 509 dn->dn_compress = ZIO_COMPRESS_INHERIT; | |
| 510 ASSERT3U(dn->dn_nblkptr, <=, DN_MAX_NBLKPTR); | |
| 511 | |
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512 /* fix up the bonus db_size */ |
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513 if (dn->dn_bonus) { |
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514 dn->dn_bonus->db.db_size = |
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515 DN_MAX_BONUSLEN - (dn->dn_nblkptr-1) * sizeof (blkptr_t); |
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516 ASSERT(dn->dn_bonuslen <= dn->dn_bonus->db.db_size); |
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517 } |
| 3087 | 518 |
| 789 | 519 dn->dn_allocated_txg = tx->tx_txg; |
| 520 mutex_exit(&dn->dn_mtx); | |
| 521 } | |
| 522 | |
| 523 void | |
| 524 dnode_special_close(dnode_t *dn) | |
| 525 { | |
| 1544 | 526 /* |
| 527 * Wait for final references to the dnode to clear. This can | |
| 528 * only happen if the arc is asyncronously evicting state that | |
| 529 * has a hold on this dnode while we are trying to evict this | |
| 530 * dnode. | |
| 531 */ | |
| 532 while (refcount_count(&dn->dn_holds) > 0) | |
| 533 delay(1); | |
| 789 | 534 dnode_destroy(dn); |
| 535 } | |
| 536 | |
| 537 dnode_t * | |
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538 dnode_special_open(objset_t *os, dnode_phys_t *dnp, uint64_t object) |
| 789 | 539 { |
| 540 dnode_t *dn = dnode_create(os, dnp, NULL, object); | |
|
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541 DNODE_VERIFY(dn); |
| 789 | 542 return (dn); |
| 543 } | |
| 544 | |
| 545 static void | |
| 546 dnode_buf_pageout(dmu_buf_t *db, void *arg) | |
| 547 { | |
| 548 dnode_t **children_dnodes = arg; | |
| 549 int i; | |
| 550 int epb = db->db_size >> DNODE_SHIFT; | |
| 551 | |
| 552 for (i = 0; i < epb; i++) { | |
| 553 dnode_t *dn = children_dnodes[i]; | |
| 554 int n; | |
| 555 | |
| 556 if (dn == NULL) | |
| 557 continue; | |
| 558 #ifdef ZFS_DEBUG | |
| 559 /* | |
| 560 * If there are holds on this dnode, then there should | |
| 561 * be holds on the dnode's containing dbuf as well; thus | |
| 562 * it wouldn't be eligable for eviction and this function | |
| 563 * would not have been called. | |
| 564 */ | |
| 565 ASSERT(refcount_is_zero(&dn->dn_holds)); | |
| 566 ASSERT(list_head(&dn->dn_dbufs) == NULL); | |
| 567 ASSERT(refcount_is_zero(&dn->dn_tx_holds)); | |
| 568 | |
| 569 for (n = 0; n < TXG_SIZE; n++) | |
|
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570 ASSERT(!list_link_active(&dn->dn_dirty_link[n])); |
| 789 | 571 #endif |
| 572 children_dnodes[i] = NULL; | |
| 573 dnode_destroy(dn); | |
| 574 } | |
| 575 kmem_free(children_dnodes, epb * sizeof (dnode_t *)); | |
| 576 } | |
| 577 | |
| 578 /* | |
| 1544 | 579 * errors: |
| 580 * EINVAL - invalid object number. | |
| 581 * EIO - i/o error. | |
| 582 * succeeds even for free dnodes. | |
| 789 | 583 */ |
| 1544 | 584 int |
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585 dnode_hold_impl(objset_t *os, uint64_t object, int flag, |
| 1544 | 586 void *tag, dnode_t **dnp) |
| 789 | 587 { |
| 1544 | 588 int epb, idx, err; |
| 789 | 589 int drop_struct_lock = FALSE; |
| 1544 | 590 int type; |
| 789 | 591 uint64_t blk; |
| 592 dnode_t *mdn, *dn; | |
| 593 dmu_buf_impl_t *db; | |
| 594 dnode_t **children_dnodes; | |
| 595 | |
|
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596 /* |
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597 * If you are holding the spa config lock as writer, you shouldn't |
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598 * be asking the DMU to do *anything* unless it's the root pool |
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599 * which may require us to read from the root filesystem while |
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600 * holding some (not all) of the locks as writer. |
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601 */ |
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602 ASSERT(spa_config_held(os->os_spa, SCL_ALL, RW_WRITER) == 0 || |
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603 (spa_is_root(os->os_spa) && |
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604 spa_config_held(os->os_spa, SCL_STATE, RW_WRITER) && |
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605 !spa_config_held(os->os_spa, SCL_ZIO, RW_WRITER))); |
|
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606 |
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607 if (object == DMU_USERUSED_OBJECT || object == DMU_GROUPUSED_OBJECT) { |
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608 dn = (object == DMU_USERUSED_OBJECT) ? |
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609 os->os_userused_dnode : os->os_groupused_dnode; |
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610 if (dn == NULL) |
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611 return (ENOENT); |
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612 type = dn->dn_type; |
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613 if ((flag & DNODE_MUST_BE_ALLOCATED) && type == DMU_OT_NONE) |
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614 return (ENOENT); |
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615 if ((flag & DNODE_MUST_BE_FREE) && type != DMU_OT_NONE) |
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616 return (EEXIST); |
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617 DNODE_VERIFY(dn); |
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618 (void) refcount_add(&dn->dn_holds, tag); |
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619 *dnp = dn; |
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620 return (0); |
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621 } |
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622 |
| 789 | 623 if (object == 0 || object >= DN_MAX_OBJECT) |
| 1544 | 624 return (EINVAL); |
| 789 | 625 |
| 626 mdn = os->os_meta_dnode; | |
| 627 | |
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628 DNODE_VERIFY(mdn); |
| 789 | 629 |
| 630 if (!RW_WRITE_HELD(&mdn->dn_struct_rwlock)) { | |
| 631 rw_enter(&mdn->dn_struct_rwlock, RW_READER); | |
| 632 drop_struct_lock = TRUE; | |
| 633 } | |
| 634 | |
| 635 blk = dbuf_whichblock(mdn, object * sizeof (dnode_phys_t)); | |
| 636 | |
| 1544 | 637 db = dbuf_hold(mdn, blk, FTAG); |
| 789 | 638 if (drop_struct_lock) |
| 639 rw_exit(&mdn->dn_struct_rwlock); | |
| 1544 | 640 if (db == NULL) |
| 641 return (EIO); | |
| 642 err = dbuf_read(db, NULL, DB_RF_CANFAIL); | |
| 643 if (err) { | |
| 644 dbuf_rele(db, FTAG); | |
| 645 return (err); | |
| 646 } | |
| 789 | 647 |
| 648 ASSERT3U(db->db.db_size, >=, 1<<DNODE_SHIFT); | |
| 649 epb = db->db.db_size >> DNODE_SHIFT; | |
| 650 | |
| 651 idx = object & (epb-1); | |
| 652 | |
| 653 children_dnodes = dmu_buf_get_user(&db->db); | |
| 654 if (children_dnodes == NULL) { | |
| 655 dnode_t **winner; | |
| 656 children_dnodes = kmem_zalloc(epb * sizeof (dnode_t *), | |
| 657 KM_SLEEP); | |
| 658 if (winner = dmu_buf_set_user(&db->db, children_dnodes, NULL, | |
| 659 dnode_buf_pageout)) { | |
| 660 kmem_free(children_dnodes, epb * sizeof (dnode_t *)); | |
| 661 children_dnodes = winner; | |
| 662 } | |
| 663 } | |
| 664 | |
| 665 if ((dn = children_dnodes[idx]) == NULL) { | |
|
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666 dnode_phys_t *dnp = (dnode_phys_t *)db->db.db_data+idx; |
| 789 | 667 dnode_t *winner; |
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668 |
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669 dn = dnode_create(os, dnp, db, object); |
| 789 | 670 winner = atomic_cas_ptr(&children_dnodes[idx], NULL, dn); |
| 671 if (winner != NULL) { | |
| 672 dnode_destroy(dn); | |
| 673 dn = winner; | |
| 674 } | |
| 675 } | |
| 676 | |
| 677 mutex_enter(&dn->dn_mtx); | |
| 1544 | 678 type = dn->dn_type; |
| 789 | 679 if (dn->dn_free_txg || |
| 1544 | 680 ((flag & DNODE_MUST_BE_ALLOCATED) && type == DMU_OT_NONE) || |
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681 ((flag & DNODE_MUST_BE_FREE) && |
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682 (type != DMU_OT_NONE || (dn->dn_id_flags & DN_ID_SYNC)))) { |
| 789 | 683 mutex_exit(&dn->dn_mtx); |
| 1544 | 684 dbuf_rele(db, FTAG); |
| 685 return (type == DMU_OT_NONE ? ENOENT : EEXIST); | |
| 789 | 686 } |
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687 if (flag & DNODE_MUST_BE_FREE) { |
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688 ASSERT(refcount_is_zero(&dn->dn_holds)); |
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689 ASSERT(!(dn->dn_id_flags & DN_ID_SYNC)); |
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690 } |
| 789 | 691 mutex_exit(&dn->dn_mtx); |
| 692 | |
| 1544 | 693 if (refcount_add(&dn->dn_holds, tag) == 1) |
| 789 | 694 dbuf_add_ref(db, dn); |
| 695 | |
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696 DNODE_VERIFY(dn); |
| 789 | 697 ASSERT3P(dn->dn_dbuf, ==, db); |
| 698 ASSERT3U(dn->dn_object, ==, object); | |
| 1544 | 699 dbuf_rele(db, FTAG); |
| 789 | 700 |
| 1544 | 701 *dnp = dn; |
| 702 return (0); | |
| 789 | 703 } |
| 704 | |
| 705 /* | |
| 706 * Return held dnode if the object is allocated, NULL if not. | |
| 707 */ | |
| 1544 | 708 int |
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709 dnode_hold(objset_t *os, uint64_t object, void *tag, dnode_t **dnp) |
| 789 | 710 { |
| 1544 | 711 return (dnode_hold_impl(os, object, DNODE_MUST_BE_ALLOCATED, tag, dnp)); |
| 789 | 712 } |
| 713 | |
|
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714 /* |
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715 * Can only add a reference if there is already at least one |
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716 * reference on the dnode. Returns FALSE if unable to add a |
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717 * new reference. |
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718 */ |
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719 boolean_t |
| 1544 | 720 dnode_add_ref(dnode_t *dn, void *tag) |
| 789 | 721 { |
|
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722 mutex_enter(&dn->dn_mtx); |
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723 if (refcount_is_zero(&dn->dn_holds)) { |
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724 mutex_exit(&dn->dn_mtx); |
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725 return (FALSE); |
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726 } |
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727 VERIFY(1 < refcount_add(&dn->dn_holds, tag)); |
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728 mutex_exit(&dn->dn_mtx); |
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729 return (TRUE); |
| 789 | 730 } |
| 731 | |
| 732 void | |
| 1544 | 733 dnode_rele(dnode_t *dn, void *tag) |
| 789 | 734 { |
| 735 uint64_t refs; | |
| 736 | |
|
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737 mutex_enter(&dn->dn_mtx); |
| 1544 | 738 refs = refcount_remove(&dn->dn_holds, tag); |
|
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739 mutex_exit(&dn->dn_mtx); |
| 789 | 740 /* NOTE: the DNODE_DNODE does not have a dn_dbuf */ |
| 741 if (refs == 0 && dn->dn_dbuf) | |
| 1544 | 742 dbuf_rele(dn->dn_dbuf, dn); |
| 789 | 743 } |
| 744 | |
| 745 void | |
| 746 dnode_setdirty(dnode_t *dn, dmu_tx_t *tx) | |
| 747 { | |
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748 objset_t *os = dn->dn_objset; |
| 789 | 749 uint64_t txg = tx->tx_txg; |
| 750 | |
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751 if (DMU_OBJECT_IS_SPECIAL(dn->dn_object)) { |
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752 dsl_dataset_dirty(os->os_dsl_dataset, tx); |
| 789 | 753 return; |
|
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754 } |
| 789 | 755 |
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756 DNODE_VERIFY(dn); |
| 789 | 757 |
| 758 #ifdef ZFS_DEBUG | |
| 759 mutex_enter(&dn->dn_mtx); | |
| 760 ASSERT(dn->dn_phys->dn_type || dn->dn_allocated_txg); | |
| 761 /* ASSERT(dn->dn_free_txg == 0 || dn->dn_free_txg >= txg); */ | |
| 762 mutex_exit(&dn->dn_mtx); | |
| 763 #endif | |
| 764 | |
|
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765 /* |
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766 * Determine old uid/gid when necessary |
|
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|
767 */ |
|
12178
93ec1371f750
6939983 assertion failed: zap_count(os, DMU_USERUSED_OBJECT, &count) != 0||count == 0, in dsl_dataset.c
Mark Shellenbaum <Mark.Shellenbaum@Sun.COM>
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diff
changeset
|
768 dmu_objset_userquota_get_ids(dn, B_TRUE, tx); |
|
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|
769 |
| 789 | 770 mutex_enter(&os->os_lock); |
| 771 | |
| 772 /* | |
| 773 * If we are already marked dirty, we're done. | |
| 774 */ | |
|
1596
2e2377ccbf85
6395371 ASSERT in dmu_tx_count_free: blkid + i < dn->dn_phys->dn_nblkptr
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|
775 if (list_link_active(&dn->dn_dirty_link[txg & TXG_MASK])) { |
| 789 | 776 mutex_exit(&os->os_lock); |
| 777 return; | |
| 778 } | |
| 779 | |
| 780 ASSERT(!refcount_is_zero(&dn->dn_holds) || list_head(&dn->dn_dbufs)); | |
| 781 ASSERT(dn->dn_datablksz != 0); | |
|
4944
96d96f8de974
6569719 panic dangling dbufs (dn=ffffffff28814d30, dbuf=ffffffff20756008)
maybee
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diff
changeset
|
782 ASSERT3U(dn->dn_next_bonuslen[txg&TXG_MASK], ==, 0); |
| 1599 | 783 ASSERT3U(dn->dn_next_blksz[txg&TXG_MASK], ==, 0); |
|
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|
784 ASSERT3U(dn->dn_next_bonustype[txg&TXG_MASK], ==, 0); |
| 789 | 785 |
| 786 dprintf_ds(os->os_dsl_dataset, "obj=%llu txg=%llu\n", | |
| 787 dn->dn_object, txg); | |
| 788 | |
| 789 if (dn->dn_free_txg > 0 && dn->dn_free_txg <= txg) { | |
| 790 list_insert_tail(&os->os_free_dnodes[txg&TXG_MASK], dn); | |
| 791 } else { | |
| 792 list_insert_tail(&os->os_dirty_dnodes[txg&TXG_MASK], dn); | |
| 793 } | |
| 794 | |
| 795 mutex_exit(&os->os_lock); | |
| 796 | |
| 797 /* | |
| 798 * The dnode maintains a hold on its containing dbuf as | |
| 799 * long as there are holds on it. Each instantiated child | |
| 800 * dbuf maintaines a hold on the dnode. When the last child | |
| 801 * drops its hold, the dnode will drop its hold on the | |
| 802 * containing dbuf. We add a "dirty hold" here so that the | |
| 803 * dnode will hang around after we finish processing its | |
| 804 * children. | |
| 805 */ | |
|
4944
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6569719 panic dangling dbufs (dn=ffffffff28814d30, dbuf=ffffffff20756008)
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|
806 VERIFY(dnode_add_ref(dn, (void *)(uintptr_t)tx->tx_txg)); |
| 789 | 807 |
|
3547
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808 (void) dbuf_dirty(dn->dn_dbuf, tx); |
| 789 | 809 |
| 810 dsl_dataset_dirty(os->os_dsl_dataset, tx); | |
| 811 } | |
| 812 | |
| 813 void | |
| 814 dnode_free(dnode_t *dn, dmu_tx_t *tx) | |
| 815 { | |
|
1596
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6395371 ASSERT in dmu_tx_count_free: blkid + i < dn->dn_phys->dn_nblkptr
ahrens
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|
816 int txgoff = tx->tx_txg & TXG_MASK; |
|
2e2377ccbf85
6395371 ASSERT in dmu_tx_count_free: blkid + i < dn->dn_phys->dn_nblkptr
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|
817 |
| 789 | 818 dprintf("dn=%p txg=%llu\n", dn, tx->tx_txg); |
| 819 | |
| 820 /* we should be the only holder... hopefully */ | |
| 821 /* ASSERT3U(refcount_count(&dn->dn_holds), ==, 1); */ | |
| 822 | |
| 823 mutex_enter(&dn->dn_mtx); | |
| 824 if (dn->dn_type == DMU_OT_NONE || dn->dn_free_txg) { | |
| 825 mutex_exit(&dn->dn_mtx); | |
| 826 return; | |
| 827 } | |
| 828 dn->dn_free_txg = tx->tx_txg; | |
| 829 mutex_exit(&dn->dn_mtx); | |
| 830 | |
| 831 /* | |
| 832 * If the dnode is already dirty, it needs to be moved from | |
| 833 * the dirty list to the free list. | |
| 834 */ | |
| 835 mutex_enter(&dn->dn_objset->os_lock); | |
|
1596
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6395371 ASSERT in dmu_tx_count_free: blkid + i < dn->dn_phys->dn_nblkptr
ahrens
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changeset
|
836 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
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|
837 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
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|
838 list_insert_tail(&dn->dn_objset->os_free_dnodes[txgoff], dn); |
| 789 | 839 mutex_exit(&dn->dn_objset->os_lock); |
| 840 } else { | |
| 841 mutex_exit(&dn->dn_objset->os_lock); | |
| 842 dnode_setdirty(dn, tx); | |
| 843 } | |
| 844 } | |
| 845 | |
| 846 /* | |
| 847 * Try to change the block size for the indicated dnode. This can only | |
| 848 * succeed if there are no blocks allocated or dirty beyond first block | |
| 849 */ | |
| 850 int | |
| 851 dnode_set_blksz(dnode_t *dn, uint64_t size, int ibs, dmu_tx_t *tx) | |
| 852 { | |
| 853 dmu_buf_impl_t *db, *db_next; | |
| 6992 | 854 int err; |
| 789 | 855 |
| 856 if (size == 0) | |
| 857 size = SPA_MINBLOCKSIZE; | |
| 858 if (size > SPA_MAXBLOCKSIZE) | |
| 859 size = SPA_MAXBLOCKSIZE; | |
| 860 else | |
| 861 size = P2ROUNDUP(size, SPA_MINBLOCKSIZE); | |
| 862 | |
|
2445
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6447381 dnode_free_range() does not handle non-power-of-two blocksizes correctly
ahrens
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changeset
|
863 if (ibs == dn->dn_indblkshift) |
|
45c1310316ff
6447381 dnode_free_range() does not handle non-power-of-two blocksizes correctly
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changeset
|
864 ibs = 0; |
| 789 | 865 |
|
2445
45c1310316ff
6447381 dnode_free_range() does not handle non-power-of-two blocksizes correctly
ahrens
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changeset
|
866 if (size >> SPA_MINBLOCKSHIFT == dn->dn_datablkszsec && ibs == 0) |
| 789 | 867 return (0); |
| 868 | |
| 869 rw_enter(&dn->dn_struct_rwlock, RW_WRITER); | |
| 870 | |
| 871 /* Check for any allocated blocks beyond the first */ | |
| 872 if (dn->dn_phys->dn_maxblkid != 0) | |
|
2445
45c1310316ff
6447381 dnode_free_range() does not handle non-power-of-two blocksizes correctly
ahrens
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diff
changeset
|
873 goto fail; |
| 789 | 874 |
| 875 mutex_enter(&dn->dn_dbufs_mtx); | |
| 876 for (db = list_head(&dn->dn_dbufs); db; db = db_next) { | |
| 877 db_next = list_next(&dn->dn_dbufs, db); | |
| 878 | |
|
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|
879 if (db->db_blkid != 0 && db->db_blkid != DMU_BONUS_BLKID && |
|
538c866aaac6
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changeset
|
880 db->db_blkid != DMU_SPILL_BLKID) { |
| 789 | 881 mutex_exit(&dn->dn_dbufs_mtx); |
|
2445
45c1310316ff
6447381 dnode_free_range() does not handle non-power-of-two blocksizes correctly
ahrens
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diff
changeset
|
882 goto fail; |
| 789 | 883 } |
| 884 } | |
| 885 mutex_exit(&dn->dn_dbufs_mtx); | |
| 886 | |
|
2445
45c1310316ff
6447381 dnode_free_range() does not handle non-power-of-two blocksizes correctly
ahrens
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2082
diff
changeset
|
887 if (ibs && dn->dn_nlevels != 1) |
|
45c1310316ff
6447381 dnode_free_range() does not handle non-power-of-two blocksizes correctly
ahrens
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diff
changeset
|
888 goto fail; |
|
45c1310316ff
6447381 dnode_free_range() does not handle non-power-of-two blocksizes correctly
ahrens
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2082
diff
changeset
|
889 |
| 6992 | 890 /* resize the old block */ |
| 891 err = dbuf_hold_impl(dn, 0, 0, TRUE, FTAG, &db); | |
| 892 if (err == 0) | |
|
1596
2e2377ccbf85
6395371 ASSERT in dmu_tx_count_free: blkid + i < dn->dn_phys->dn_nblkptr
ahrens
parents:
1544
diff
changeset
|
893 dbuf_new_size(db, size, tx); |
| 6992 | 894 else if (err != ENOENT) |
| 895 goto fail; | |
| 789 | 896 |
| 897 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
|
898 dnode_setdirty(dn, tx); |
|
2e2377ccbf85
6395371 ASSERT in dmu_tx_count_free: blkid + i < dn->dn_phys->dn_nblkptr
ahrens
parents:
1544
diff
changeset
|
899 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
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2082
diff
changeset
|
900 if (ibs) { |
|
45c1310316ff
6447381 dnode_free_range() does not handle non-power-of-two blocksizes correctly
ahrens
parents:
2082
diff
changeset
|
901 dn->dn_indblkshift = ibs; |
|
45c1310316ff
6447381 dnode_free_range() does not handle non-power-of-two blocksizes correctly
ahrens
parents:
2082
diff
changeset
|
902 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
|
903 } |
| 6992 | 904 /* 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
|
905 if (db) |
|
2e2377ccbf85
6395371 ASSERT in dmu_tx_count_free: blkid + i < dn->dn_phys->dn_nblkptr
ahrens
parents:
1544
diff
changeset
|
906 dbuf_rele(db, FTAG); |
| 789 | 907 |
| 908 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
|
909 return (0); |
|
45c1310316ff
6447381 dnode_free_range() does not handle non-power-of-two blocksizes correctly
ahrens
parents:
2082
diff
changeset
|
910 |
|
45c1310316ff
6447381 dnode_free_range() does not handle non-power-of-two blocksizes correctly
ahrens
parents:
2082
diff
changeset
|
911 fail: |
|
45c1310316ff
6447381 dnode_free_range() does not handle non-power-of-two blocksizes correctly
ahrens
parents:
2082
diff
changeset
|
912 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
|
913 return (ENOTSUP); |
| 789 | 914 } |
| 915 | |
|
7332
396f25bd1f34
6579975 dnode_new_blkid should look before it locks
Jonathan W Adams <Jonathan.Adams@Sun.COM>
parents:
7049
diff
changeset
|
916 /* read-holding callers must not rely on the lock being continuously held */ |
| 789 | 917 void |
|
7332
396f25bd1f34
6579975 dnode_new_blkid should look before it locks
Jonathan W Adams <Jonathan.Adams@Sun.COM>
parents:
7049
diff
changeset
|
918 dnode_new_blkid(dnode_t *dn, uint64_t blkid, dmu_tx_t *tx, boolean_t have_read) |
| 789 | 919 { |
| 920 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
|
921 int epbs, new_nlevels; |
| 789 | 922 uint64_t sz; |
| 923 | |
|
11935
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changeset
|
924 ASSERT(blkid != DMU_BONUS_BLKID); |
| 789 | 925 |
|
7332
396f25bd1f34
6579975 dnode_new_blkid should look before it locks
Jonathan W Adams <Jonathan.Adams@Sun.COM>
parents:
7049
diff
changeset
|
926 ASSERT(have_read ? |
|
396f25bd1f34
6579975 dnode_new_blkid should look before it locks
Jonathan W Adams <Jonathan.Adams@Sun.COM>
parents:
7049
diff
changeset
|
927 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
|
928 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
|
929 |
|
396f25bd1f34
6579975 dnode_new_blkid should look before it locks
Jonathan W Adams <Jonathan.Adams@Sun.COM>
parents:
7049
diff
changeset
|
930 /* |
|
396f25bd1f34
6579975 dnode_new_blkid should look before it locks
Jonathan W Adams <Jonathan.Adams@Sun.COM>
parents:
7049
diff
changeset
|
931 * 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
|
932 * 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
|
933 */ |
|
396f25bd1f34
6579975 dnode_new_blkid should look before it locks
Jonathan W Adams <Jonathan.Adams@Sun.COM>
parents:
7049
diff
changeset
|
934 if (have_read) { |
|
396f25bd1f34
6579975 dnode_new_blkid should look before it locks
Jonathan W Adams <Jonathan.Adams@Sun.COM>
parents:
7049
diff
changeset
|
935 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
|
936 return; |
|
396f25bd1f34
6579975 dnode_new_blkid should look before it locks
Jonathan W Adams <Jonathan.Adams@Sun.COM>
parents:
7049
diff
changeset
|
937 |
|
396f25bd1f34
6579975 dnode_new_blkid should look before it locks
Jonathan W Adams <Jonathan.Adams@Sun.COM>
parents:
7049
diff
changeset
|
938 if (!rw_tryupgrade(&dn->dn_struct_rwlock)) { |
|
396f25bd1f34
6579975 dnode_new_blkid should look before it locks
Jonathan W Adams <Jonathan.Adams@Sun.COM>
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7049
diff
changeset
|
939 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
|
940 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
|
941 } |
| 789 | 942 } |
| 943 | |
|
1596
2e2377ccbf85
6395371 ASSERT in dmu_tx_count_free: blkid + i < dn->dn_phys->dn_nblkptr
ahrens
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1544
diff
changeset
|
944 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
|
945 goto out; |
|
2e2377ccbf85
6395371 ASSERT in dmu_tx_count_free: blkid + i < dn->dn_phys->dn_nblkptr
ahrens
parents:
1544
diff
changeset
|
946 |
|
2e2377ccbf85
6395371 ASSERT in dmu_tx_count_free: blkid + i < dn->dn_phys->dn_nblkptr
ahrens
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1544
diff
changeset
|
947 dn->dn_maxblkid = blkid; |
| 789 | 948 |
| 949 /* | |
|
1596
2e2377ccbf85
6395371 ASSERT in dmu_tx_count_free: blkid + i < dn->dn_phys->dn_nblkptr
ahrens
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1544
diff
changeset
|
950 * Compute the number of levels necessary to support the new maxblkid. |
| 789 | 951 */ |
| 952 new_nlevels = 1; | |
| 953 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
|
954 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
|
955 sz <= blkid && sz >= dn->dn_nblkptr; sz <<= epbs) |
| 789 | 956 new_nlevels++; |
| 957 | |
|
1596
2e2377ccbf85
6395371 ASSERT in dmu_tx_count_free: blkid + i < dn->dn_phys->dn_nblkptr
ahrens
parents:
1544
diff
changeset
|
958 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
|
959 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
|
960 dmu_buf_impl_t *db; |
|
3547
e396e0a440b1
6512391 DMU should leverage ZIO dependencies to achieve greater parallelism
maybee
parents:
3087
diff
changeset
|
961 list_t *list; |
|
e396e0a440b1
6512391 DMU should leverage ZIO dependencies to achieve greater parallelism
maybee
parents:
3087
diff
changeset
|
962 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
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1544
diff
changeset
|
963 |
|
2e2377ccbf85
6395371 ASSERT in dmu_tx_count_free: blkid + i < dn->dn_phys->dn_nblkptr
ahrens
parents:
1544
diff
changeset
|
964 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
|
965 |
|
2e2377ccbf85
6395371 ASSERT in dmu_tx_count_free: blkid + i < dn->dn_phys->dn_nblkptr
ahrens
parents:
1544
diff
changeset
|
966 ASSERT3U(new_nlevels, >, dn->dn_next_nlevels[txgoff]); |
| 789 | 967 dn->dn_next_nlevels[txgoff] = new_nlevels; |
| 968 | |
|
3547
e396e0a440b1
6512391 DMU should leverage ZIO dependencies to achieve greater parallelism
maybee
parents:
3087
diff
changeset
|
969 /* dirty the left indirects */ |
|
1596
2e2377ccbf85
6395371 ASSERT in dmu_tx_count_free: blkid + i < dn->dn_phys->dn_nblkptr
ahrens
parents:
1544
diff
changeset
|
970 db = dbuf_hold_level(dn, old_nlevels, 0, FTAG); |
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971 new = dbuf_dirty(db, tx); |
| 1544 | 972 dbuf_rele(db, FTAG); |
|
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973 |
|
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974 /* transfer the dirty records to the new indirect */ |
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975 mutex_enter(&dn->dn_mtx); |
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976 mutex_enter(&new->dt.di.dr_mtx); |
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977 list = &dn->dn_dirty_records[txgoff]; |
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978 for (dr = list_head(list); dr; dr = dr_next) { |
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979 dr_next = list_next(&dn->dn_dirty_records[txgoff], dr); |
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980 if (dr->dr_dbuf->db_level != new_nlevels-1 && |
|
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981 dr->dr_dbuf->db_blkid != DMU_BONUS_BLKID && |
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982 dr->dr_dbuf->db_blkid != DMU_SPILL_BLKID) { |
|
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983 ASSERT(dr->dr_dbuf->db_level == old_nlevels-1); |
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984 list_remove(&dn->dn_dirty_records[txgoff], dr); |
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985 list_insert_tail(&new->dt.di.dr_children, dr); |
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986 dr->dr_parent = new; |
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987 } |
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988 } |
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989 mutex_exit(&new->dt.di.dr_mtx); |
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990 mutex_exit(&dn->dn_mtx); |
| 789 | 991 } |
| 992 | |
| 993 out: | |
|
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994 if (have_read) |
|
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995 rw_downgrade(&dn->dn_struct_rwlock); |
| 789 | 996 } |
| 997 | |
| 998 void | |
| 999 dnode_clear_range(dnode_t *dn, uint64_t blkid, uint64_t nblks, dmu_tx_t *tx) | |
| 1000 { | |
| 1001 avl_tree_t *tree = &dn->dn_ranges[tx->tx_txg&TXG_MASK]; | |
| 1002 avl_index_t where; | |
| 1003 free_range_t *rp; | |
| 1004 free_range_t rp_tofind; | |
| 1005 uint64_t endblk = blkid + nblks; | |
| 1006 | |
| 1007 ASSERT(MUTEX_HELD(&dn->dn_mtx)); | |
| 1008 ASSERT(nblks <= UINT64_MAX - blkid); /* no overflow */ | |
| 1009 | |
| 1010 dprintf_dnode(dn, "blkid=%llu nblks=%llu txg=%llu\n", | |
| 1011 blkid, nblks, tx->tx_txg); | |
| 1012 rp_tofind.fr_blkid = blkid; | |
| 1013 rp = avl_find(tree, &rp_tofind, &where); | |
| 1014 if (rp == NULL) | |
| 1015 rp = avl_nearest(tree, where, AVL_BEFORE); | |
| 1016 if (rp == NULL) | |
| 1017 rp = avl_nearest(tree, where, AVL_AFTER); | |
| 1018 | |
| 1019 while (rp && (rp->fr_blkid <= blkid + nblks)) { | |
| 1020 uint64_t fr_endblk = rp->fr_blkid + rp->fr_nblks; | |
| 1021 free_range_t *nrp = AVL_NEXT(tree, rp); | |
| 1022 | |
| 1023 if (blkid <= rp->fr_blkid && endblk >= fr_endblk) { | |
| 1024 /* clear this entire range */ | |
| 1025 avl_remove(tree, rp); | |
| 1026 kmem_free(rp, sizeof (free_range_t)); | |
| 1027 } else if (blkid <= rp->fr_blkid && | |
| 1028 endblk > rp->fr_blkid && endblk < fr_endblk) { | |
| 1029 /* clear the beginning of this range */ | |
| 1030 rp->fr_blkid = endblk; | |
| 1031 rp->fr_nblks = fr_endblk - endblk; | |
| 1032 } else if (blkid > rp->fr_blkid && blkid < fr_endblk && | |
| 1033 endblk >= fr_endblk) { | |
| 1034 /* clear the end of this range */ | |
| 1035 rp->fr_nblks = blkid - rp->fr_blkid; | |
| 1036 } else if (blkid > rp->fr_blkid && endblk < fr_endblk) { | |
| 1037 /* clear a chunk out of this range */ | |
| 1038 free_range_t *new_rp = | |
| 1039 kmem_alloc(sizeof (free_range_t), KM_SLEEP); | |
| 1040 | |
| 1041 new_rp->fr_blkid = endblk; | |
| 1042 new_rp->fr_nblks = fr_endblk - endblk; | |
| 1043 avl_insert_here(tree, new_rp, rp, AVL_AFTER); | |
| 1044 rp->fr_nblks = blkid - rp->fr_blkid; | |
| 1045 } | |
| 1046 /* there may be no overlap */ | |
| 1047 rp = nrp; | |
| 1048 } | |
| 1049 } | |
| 1050 | |
| 1051 void | |
| 1052 dnode_free_range(dnode_t *dn, uint64_t off, uint64_t len, dmu_tx_t *tx) | |
| 1053 { | |
| 1054 dmu_buf_impl_t *db; | |
|
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1055 uint64_t blkoff, blkid, nblks; |
| 6992 | 1056 int blksz, blkshift, head, tail; |
| 789 | 1057 int trunc = FALSE; |
| 6992 | 1058 int epbs; |
| 789 | 1059 |
| 1060 rw_enter(&dn->dn_struct_rwlock, RW_WRITER); | |
| 1061 blksz = dn->dn_datablksz; | |
| 6992 | 1062 blkshift = dn->dn_datablkshift; |
| 1063 epbs = dn->dn_indblkshift - SPA_BLKPTRSHIFT; | |
| 789 | 1064 |
| 1065 if (len == -1ULL) { | |
| 1066 len = UINT64_MAX - off; | |
| 1067 trunc = TRUE; | |
| 1068 } | |
| 1069 | |
| 1070 /* | |
| 1071 * First, block align the region to free: | |
| 1072 */ | |
|
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1073 if (ISP2(blksz)) { |
|
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1074 head = P2NPHASE(off, blksz); |
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1075 blkoff = P2PHASE(off, blksz); |
| 6992 | 1076 if ((off >> blkshift) > dn->dn_maxblkid) |
| 1077 goto out; | |
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1078 } else { |
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1079 ASSERT(dn->dn_maxblkid == 0); |
|
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1080 if (off == 0 && len >= blksz) { |
| 6992 | 1081 /* Freeing the whole block; fast-track this request */ |
| 1082 blkid = 0; | |
| 1083 nblks = 1; | |
| 1084 goto done; | |
|
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1085 } else if (off >= blksz) { |
| 6992 | 1086 /* Freeing past end-of-data */ |
| 1087 goto out; | |
| 789 | 1088 } else { |
|
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1089 /* Freeing part of the block. */ |
| 789 | 1090 head = blksz - off; |
| 1091 ASSERT3U(head, >, 0); | |
| 1092 } | |
|
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1093 blkoff = off; |
| 789 | 1094 } |
| 1095 /* zero out any partial block data at the start of the range */ | |
| 1096 if (head) { | |
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|
1097 ASSERT3U(blkoff + head, ==, blksz); |
| 789 | 1098 if (len < head) |
| 1099 head = len; | |
| 1100 if (dbuf_hold_impl(dn, 0, dbuf_whichblock(dn, off), TRUE, | |
| 1101 FTAG, &db) == 0) { | |
| 1102 caddr_t data; | |
| 1103 | |
| 1104 /* don't dirty if it isn't on disk and isn't dirty */ | |
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1105 if (db->db_last_dirty || |
| 789 | 1106 (db->db_blkptr && !BP_IS_HOLE(db->db_blkptr))) { |
| 1107 rw_exit(&dn->dn_struct_rwlock); | |
| 1108 dbuf_will_dirty(db, tx); | |
| 1109 rw_enter(&dn->dn_struct_rwlock, RW_WRITER); | |
| 1110 data = db->db.db_data; | |
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|
1111 bzero(data + blkoff, head); |
| 789 | 1112 } |
| 1544 | 1113 dbuf_rele(db, FTAG); |
| 789 | 1114 } |
| 1115 off += head; | |
| 1116 len -= head; | |
| 1117 } | |
| 1118 | |
|
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|
1119 /* If the range was less than one block, we're done */ |
| 6992 | 1120 if (len == 0) |
| 1121 goto out; | |
| 1122 | |
| 1123 /* If the remaining range is past end of file, we're done */ | |
| 1124 if ((off >> blkshift) > dn->dn_maxblkid) | |
| 1125 goto out; | |
| 1126 | |
|
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diff
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|
1127 ASSERT(ISP2(blksz)); |
| 6992 | 1128 if (trunc) |
| 1129 tail = 0; | |
| 1130 else | |
| 1131 tail = P2PHASE(len, blksz); | |
| 1132 | |
| 1133 ASSERT3U(P2PHASE(off, blksz), ==, 0); | |
| 1134 /* zero out any partial block data at the end of the range */ | |
| 1135 if (tail) { | |
| 1136 if (len < tail) | |
| 1137 tail = len; | |
| 1138 if (dbuf_hold_impl(dn, 0, dbuf_whichblock(dn, off+len), | |
| 1139 TRUE, FTAG, &db) == 0) { | |
| 1140 /* don't dirty if not on disk and not dirty */ | |
| 1141 if (db->db_last_dirty || | |
| 1142 (db->db_blkptr && !BP_IS_HOLE(db->db_blkptr))) { | |
| 1143 rw_exit(&dn->dn_struct_rwlock); | |
| 1144 dbuf_will_dirty(db, tx); | |
| 1145 rw_enter(&dn->dn_struct_rwlock, RW_WRITER); | |
| 1146 bzero(db->db.db_data, tail); | |
| 1147 } | |
| 1148 dbuf_rele(db, FTAG); | |
| 1149 } | |
| 1150 len -= tail; | |
| 1151 } | |
| 1152 | |
| 1153 /* If the range did not include a full block, we are done */ | |
| 1154 if (len == 0) | |
| 789 | 1155 goto out; |
| 1156 | |
| 6992 | 1157 ASSERT(IS_P2ALIGNED(off, blksz)); |
| 1158 ASSERT(trunc || IS_P2ALIGNED(len, blksz)); | |
| 1159 blkid = off >> blkshift; | |
| 1160 nblks = len >> blkshift; | |
| 1161 if (trunc) | |
| 1162 nblks += 1; | |
|
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|
1163 |
| 6992 | 1164 /* |
| 1165 * Read in and mark all the level-1 indirects dirty, | |
| 1166 * so that they will stay in memory until syncing phase. | |
|
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|
1167 * Always dirty the first and last indirect to make sure |
|
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diff
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|
1168 * we dirty all the partial indirects. |
| 6992 | 1169 */ |
| 1170 if (dn->dn_nlevels > 1) { | |
| 1171 uint64_t i, first, last; | |
| 1172 int shift = epbs + dn->dn_datablkshift; | |
|
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|
1173 |
| 6992 | 1174 first = blkid >> epbs; |
|
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|
1175 if (db = dbuf_hold_level(dn, 1, first, FTAG)) { |
|
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|
1176 dbuf_will_dirty(db, tx); |
|
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|
1177 dbuf_rele(db, FTAG); |
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|
1178 } |
| 6992 | 1179 if (trunc) |
| 1180 last = dn->dn_maxblkid >> epbs; | |
|
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|
1181 else |
| 6992 | 1182 last = (blkid + nblks - 1) >> epbs; |
|
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|
1183 if (last > first && (db = dbuf_hold_level(dn, 1, last, FTAG))) { |
|
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|
1184 dbuf_will_dirty(db, tx); |
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|
1185 dbuf_rele(db, FTAG); |
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|
1186 } |
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1187 for (i = first + 1; i < last; i++) { |
| 6992 | 1188 uint64_t ibyte = i << shift; |
| 1189 int err; | |
| 789 | 1190 |
| 6992 | 1191 err = dnode_next_offset(dn, |
| 1192 DNODE_FIND_HAVELOCK, &ibyte, 1, 1, 0); | |
| 1193 i = ibyte >> shift; | |
|
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1194 if (err == ESRCH || i >= last) |
| 6992 | 1195 break; |
| 1196 ASSERT(err == 0); | |
| 1197 db = dbuf_hold_level(dn, 1, i, FTAG); | |
| 1198 if (db) { | |
| 1199 dbuf_will_dirty(db, tx); | |
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1200 dbuf_rele(db, FTAG); |
| 789 | 1201 } |
|
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1202 } |
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1203 } |
| 6992 | 1204 done: |
| 1205 /* | |
| 1206 * Add this range to the dnode range list. | |
| 1207 * We will finish up this free operation in the syncing phase. | |
| 1208 */ | |
| 789 | 1209 mutex_enter(&dn->dn_mtx); |
| 1210 dnode_clear_range(dn, blkid, nblks, tx); | |
| 1211 { | |
| 1212 free_range_t *rp, *found; | |
| 1213 avl_index_t where; | |
| 1214 avl_tree_t *tree = &dn->dn_ranges[tx->tx_txg&TXG_MASK]; | |
| 1215 | |
| 1216 /* Add new range to dn_ranges */ | |
| 1217 rp = kmem_alloc(sizeof (free_range_t), KM_SLEEP); | |
| 1218 rp->fr_blkid = blkid; | |
| 1219 rp->fr_nblks = nblks; | |
| 1220 found = avl_find(tree, rp, &where); | |
| 1221 ASSERT(found == NULL); | |
| 1222 avl_insert(tree, rp, where); | |
| 1223 dprintf_dnode(dn, "blkid=%llu nblks=%llu txg=%llu\n", | |
| 1224 blkid, nblks, tx->tx_txg); | |
| 1225 } | |
| 1226 mutex_exit(&dn->dn_mtx); | |
| 1227 | |
| 6992 | 1228 dbuf_free_range(dn, blkid, blkid + nblks - 1, tx); |
| 789 | 1229 dnode_setdirty(dn, tx); |
| 1230 out: | |
| 6992 | 1231 if (trunc && dn->dn_maxblkid >= (off >> blkshift)) |
| 1232 dn->dn_maxblkid = (off >> blkshift ? (off >> blkshift) - 1 : 0); | |
| 1233 | |
| 789 | 1234 rw_exit(&dn->dn_struct_rwlock); |
| 1235 } | |
| 1236 | |
|
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1237 static boolean_t |
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1238 dnode_spill_freed(dnode_t *dn) |
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1239 { |
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1240 int i; |
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1241 |
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1242 mutex_enter(&dn->dn_mtx); |
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1243 for (i = 0; i < TXG_SIZE; i++) { |
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1244 if (dn->dn_rm_spillblk[i] == DN_KILL_SPILLBLK) |
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1245 break; |
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1246 } |
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1247 mutex_exit(&dn->dn_mtx); |
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1248 return (i < TXG_SIZE); |
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1249 } |
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1250 |
| 789 | 1251 /* return TRUE if this blkid was freed in a recent txg, or FALSE if it wasn't */ |
| 1252 uint64_t | |
| 1253 dnode_block_freed(dnode_t *dn, uint64_t blkid) | |
| 1254 { | |
| 1255 free_range_t range_tofind; | |
| 1256 void *dp = spa_get_dsl(dn->dn_objset->os_spa); | |
| 1257 int i; | |
| 1258 | |
|
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1259 if (blkid == DMU_BONUS_BLKID) |
| 789 | 1260 return (FALSE); |
| 1261 | |
| 1262 /* | |
| 1263 * If we're in the process of opening the pool, dp will not be | |
| 1264 * set yet, but there shouldn't be anything dirty. | |
| 1265 */ | |
| 1266 if (dp == NULL) | |
| 1267 return (FALSE); | |
| 1268 | |
| 1269 if (dn->dn_free_txg) | |
| 1270 return (TRUE); | |
| 1271 | |
|
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1272 if (blkid == DMU_SPILL_BLKID) |
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1273 return (dnode_spill_freed(dn)); |
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1274 |
| 789 | 1275 range_tofind.fr_blkid = blkid; |
| 1276 mutex_enter(&dn->dn_mtx); | |
| 1277 for (i = 0; i < TXG_SIZE; i++) { | |
| 1278 free_range_t *range_found; | |
| 1279 avl_index_t idx; | |
| 1280 | |
| 1281 range_found = avl_find(&dn->dn_ranges[i], &range_tofind, &idx); | |
| 1282 if (range_found) { | |
| 1283 ASSERT(range_found->fr_nblks > 0); | |
| 1284 break; | |
| 1285 } | |
| 1286 range_found = avl_nearest(&dn->dn_ranges[i], idx, AVL_BEFORE); | |
| 1287 if (range_found && | |
| 1288 range_found->fr_blkid + range_found->fr_nblks > blkid) | |
| 1289 break; | |
| 1290 } | |
| 1291 mutex_exit(&dn->dn_mtx); | |
| 1292 return (i < TXG_SIZE); | |
| 1293 } | |
| 1294 | |
| 1295 /* call from syncing context when we actually write/free space for this dnode */ | |
| 1296 void | |
| 2082 | 1297 dnode_diduse_space(dnode_t *dn, int64_t delta) |
| 789 | 1298 { |
| 2082 | 1299 uint64_t space; |
| 1300 dprintf_dnode(dn, "dn=%p dnp=%p used=%llu delta=%lld\n", | |
| 789 | 1301 dn, dn->dn_phys, |
| 2082 | 1302 (u_longlong_t)dn->dn_phys->dn_used, |
| 1303 (longlong_t)delta); | |
| 789 | 1304 |
| 1305 mutex_enter(&dn->dn_mtx); | |
| 2082 | 1306 space = DN_USED_BYTES(dn->dn_phys); |
| 1307 if (delta > 0) { | |
| 1308 ASSERT3U(space + delta, >=, space); /* no overflow */ | |
| 789 | 1309 } else { |
| 2082 | 1310 ASSERT3U(space, >=, -delta); /* no underflow */ |
| 1311 } | |
| 1312 space += delta; | |
| 4577 | 1313 if (spa_version(dn->dn_objset->os_spa) < SPA_VERSION_DNODE_BYTES) { |
| 2082 | 1314 ASSERT((dn->dn_phys->dn_flags & DNODE_FLAG_USED_BYTES) == 0); |
| 1315 ASSERT3U(P2PHASE(space, 1<<DEV_BSHIFT), ==, 0); | |
| 1316 dn->dn_phys->dn_used = space >> DEV_BSHIFT; | |
| 1317 } else { | |
| 1318 dn->dn_phys->dn_used = space; | |
| 1319 dn->dn_phys->dn_flags |= DNODE_FLAG_USED_BYTES; | |
| 789 | 1320 } |
| 1321 mutex_exit(&dn->dn_mtx); | |
| 1322 } | |
| 1323 | |
| 1324 /* | |
| 1325 * Call when we think we're going to write/free space in open context. | |
| 1326 * Be conservative (ie. OK to write less than this or free more than | |
| 1327 * this, but don't write more or free less). | |
| 1328 */ | |
| 1329 void | |
| 1330 dnode_willuse_space(dnode_t *dn, int64_t space, dmu_tx_t *tx) | |
| 1331 { | |
|
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1332 objset_t *os = dn->dn_objset; |
| 789 | 1333 dsl_dataset_t *ds = os->os_dsl_dataset; |
| 1334 | |
| 1335 if (space > 0) | |
| 1336 space = spa_get_asize(os->os_spa, space); | |
| 1337 | |
| 1338 if (ds) | |
| 1339 dsl_dir_willuse_space(ds->ds_dir, space, tx); | |
| 1340 | |
| 1341 dmu_tx_willuse_space(tx, space); | |
| 1342 } | |
| 1343 | |
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1344 /* |
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1345 * This function scans a block at the indicated "level" looking for |
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1346 * a hole or data (depending on 'flags'). If level > 0, then we are |
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1347 * scanning an indirect block looking at its pointers. If level == 0, |
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1348 * then we are looking at a block of dnodes. If we don't find what we |
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1349 * are looking for in the block, we return ESRCH. Otherwise, return |
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1350 * with *offset pointing to the beginning (if searching forwards) or |
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1351 * end (if searching backwards) of the range covered by the block |
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1352 * pointer we matched on (or dnode). |
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1353 * |
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1354 * The basic search algorithm used below by dnode_next_offset() is to |
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1355 * use this function to search up the block tree (widen the search) until |
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1356 * we find something (i.e., we don't return ESRCH) and then search back |
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1357 * down the tree (narrow the search) until we reach our original search |
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1358 * level. |
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1359 */ |
| 789 | 1360 static int |
| 6992 | 1361 dnode_next_offset_level(dnode_t *dn, int flags, uint64_t *offset, |
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1362 int lvl, uint64_t blkfill, uint64_t txg) |
| 789 | 1363 { |
| 1364 dmu_buf_impl_t *db = NULL; | |
| 1365 void *data = NULL; | |
| 1366 uint64_t epbs = dn->dn_phys->dn_indblkshift - SPA_BLKPTRSHIFT; | |
| 1367 uint64_t epb = 1ULL << epbs; | |
| 1368 uint64_t minfill, maxfill; | |
| 6992 | 1369 boolean_t hole; |
| 1370 int i, inc, error, span; | |
| 789 | 1371 |
| 1372 dprintf("probing object %llu offset %llx level %d of %u\n", | |
| 1373 dn->dn_object, *offset, lvl, dn->dn_phys->dn_nlevels); | |
| 1374 | |
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1375 hole = ((flags & DNODE_FIND_HOLE) != 0); |
| 6992 | 1376 inc = (flags & DNODE_FIND_BACKWARDS) ? -1 : 1; |
|
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1377 ASSERT(txg == 0 || !hole); |
| 6992 | 1378 |
| 789 | 1379 if (lvl == dn->dn_phys->dn_nlevels) { |
| 1380 error = 0; | |
| 1381 epb = dn->dn_phys->dn_nblkptr; | |
| 1382 data = dn->dn_phys->dn_blkptr; | |
| 1383 } else { | |
| 1384 uint64_t blkid = dbuf_whichblock(dn, *offset) >> (epbs * lvl); | |
| 1385 error = dbuf_hold_impl(dn, lvl, blkid, TRUE, FTAG, &db); | |
| 1386 if (error) { | |
|
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1387 if (error != ENOENT) |
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1388 return (error); |
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1389 if (hole) |
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1390 return (0); |
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1391 /* |
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1392 * This can only happen when we are searching up |
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1393 * the block tree for data. We don't really need to |
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1394 * adjust the offset, as we will just end up looking |
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1395 * at the pointer to this block in its parent, and its |
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1396 * going to be unallocated, so we will skip over it. |
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1397 */ |
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1398 return (ESRCH); |
| 789 | 1399 } |
|
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1400 error = dbuf_read(db, NULL, DB_RF_CANFAIL | DB_RF_HAVESTRUCT); |
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1401 if (error) { |
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1402 dbuf_rele(db, FTAG); |
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1403 return (error); |
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1404 } |
| 789 | 1405 data = db->db.db_data; |
| 1406 } | |
| 1407 | |
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1408 if (db && txg && |
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1409 (db->db_blkptr == NULL || db->db_blkptr->blk_birth <= txg)) { |
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1410 /* |
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1411 * This can only happen when we are searching up the tree |
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1412 * and these conditions mean that we need to keep climbing. |
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1413 */ |
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1414 error = ESRCH; |
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1415 } else if (lvl == 0) { |
| 789 | 1416 dnode_phys_t *dnp = data; |
| 1417 span = DNODE_SHIFT; | |
| 1418 ASSERT(dn->dn_type == DMU_OT_DNODE); | |
| 1419 | |
| 6992 | 1420 for (i = (*offset >> span) & (blkfill - 1); |
| 1421 i >= 0 && i < blkfill; i += inc) { | |
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1422 if ((dnp[i].dn_type == DMU_OT_NONE) == hole) |
| 789 | 1423 break; |
| 6992 | 1424 *offset += (1ULL << span) * inc; |
| 789 | 1425 } |
| 6992 | 1426 if (i < 0 || i == blkfill) |
| 789 | 1427 error = ESRCH; |
| 1428 } else { | |
| 1429 blkptr_t *bp = data; | |
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1430 uint64_t start = *offset; |
| 789 | 1431 span = (lvl - 1) * epbs + dn->dn_datablkshift; |
| 1432 minfill = 0; | |
| 1433 maxfill = blkfill << ((lvl - 1) * epbs); | |
| 1434 | |
| 1435 if (hole) | |
| 1436 maxfill--; | |
| 1437 else | |
| 1438 minfill++; | |
| 1439 | |
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1440 *offset = *offset >> span; |
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1441 for (i = BF64_GET(*offset, 0, epbs); |
| 6992 | 1442 i >= 0 && i < epb; i += inc) { |
| 789 | 1443 if (bp[i].blk_fill >= minfill && |
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1444 bp[i].blk_fill <= maxfill && |
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1445 (hole || bp[i].blk_birth > txg)) |
| 789 | 1446 break; |
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1447 if (inc > 0 || *offset > 0) |
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1448 *offset += inc; |
| 789 | 1449 } |
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1450 *offset = *offset << span; |
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1451 if (inc < 0) { |
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1452 /* traversing backwards; position offset at the end */ |
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1453 ASSERT3U(*offset, <=, start); |
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1454 *offset = MIN(*offset + (1ULL << span) - 1, start); |
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1455 } else if (*offset < start) { |
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1456 *offset = start; |
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1457 } |
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1458 if (i < 0 || i >= epb) |
| 789 | 1459 error = ESRCH; |
| 1460 } | |
| 1461 | |
| 1462 if (db) | |
| 1544 | 1463 dbuf_rele(db, FTAG); |
| 789 | 1464 |
| 1465 return (error); | |
| 1466 } | |
| 1467 | |
| 1468 /* | |
| 1469 * Find the next hole, data, or sparse region at or after *offset. | |
| 1470 * The value 'blkfill' tells us how many items we expect to find | |
| 1471 * in an L0 data block; this value is 1 for normal objects, | |
| 1472 * DNODES_PER_BLOCK for the meta dnode, and some fraction of | |
| 1473 * DNODES_PER_BLOCK when searching for sparse regions thereof. | |
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1474 * |
| 789 | 1475 * Examples: |
| 1476 * | |
| 6992 | 1477 * dnode_next_offset(dn, flags, offset, 1, 1, 0); |
| 1478 * Finds the next/previous hole/data in a file. | |
| 789 | 1479 * Used in dmu_offset_next(). |
| 1480 * | |
| 6992 | 1481 * dnode_next_offset(mdn, flags, offset, 0, DNODES_PER_BLOCK, txg); |
| 789 | 1482 * Finds the next free/allocated dnode an objset's meta-dnode. |
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1483 * Only finds objects that have new contents since txg (ie. |
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1484 * bonus buffer changes and content removal are ignored). |
| 789 | 1485 * Used in dmu_object_next(). |
| 1486 * | |
| 6992 | 1487 * dnode_next_offset(mdn, DNODE_FIND_HOLE, offset, 2, DNODES_PER_BLOCK >> 2, 0); |
| 789 | 1488 * Finds the next L2 meta-dnode bp that's at most 1/4 full. |
| 1489 * Used in dmu_object_alloc(). | |
| 1490 */ | |
| 1491 int | |
| 6992 | 1492 dnode_next_offset(dnode_t *dn, int flags, uint64_t *offset, |
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1493 int minlvl, uint64_t blkfill, uint64_t txg) |
| 789 | 1494 { |
| 6992 | 1495 uint64_t initial_offset = *offset; |
| 789 | 1496 int lvl, maxlvl; |
| 1497 int error = 0; | |
| 1498 | |
| 6992 | 1499 if (!(flags & DNODE_FIND_HAVELOCK)) |
| 1500 rw_enter(&dn->dn_struct_rwlock, RW_READER); | |
| 789 | 1501 |
| 1502 if (dn->dn_phys->dn_nlevels == 0) { | |
| 6992 | 1503 error = ESRCH; |
| 1504 goto out; | |
| 789 | 1505 } |
| 1506 | |
| 1507 if (dn->dn_datablkshift == 0) { | |
| 1508 if (*offset < dn->dn_datablksz) { | |
| 6992 | 1509 if (flags & DNODE_FIND_HOLE) |
| 789 | 1510 *offset = dn->dn_datablksz; |
| 1511 } else { | |
| 1512 error = ESRCH; | |
| 1513 } | |
| 6992 | 1514 goto out; |
| 789 | 1515 } |
| 1516 | |
| 1517 maxlvl = dn->dn_phys->dn_nlevels; | |
| 1518 | |
| 1519 for (lvl = minlvl; lvl <= maxlvl; lvl++) { | |
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1520 error = dnode_next_offset_level(dn, |
| 6992 | 1521 flags, offset, lvl, blkfill, txg); |
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1522 if (error != ESRCH) |
| 789 | 1523 break; |
| 1524 } | |
| 1525 | |
| 6992 | 1526 while (error == 0 && --lvl >= minlvl) { |
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1527 error = dnode_next_offset_level(dn, |
| 6992 | 1528 flags, offset, lvl, blkfill, txg); |
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1529 } |
| 789 | 1530 |
| 6992 | 1531 if (error == 0 && (flags & DNODE_FIND_BACKWARDS ? |
| 1532 initial_offset < *offset : initial_offset > *offset)) | |
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1533 error = ESRCH; |
| 6992 | 1534 out: |
| 1535 if (!(flags & DNODE_FIND_HAVELOCK)) | |
| 1536 rw_exit(&dn->dn_struct_rwlock); | |
| 789 | 1537 |
| 1538 return (error); | |
| 1539 } |