1 /* 2 * Copyright (c) 2000-2005 Silicon Graphics, Inc. 3 * All Rights Reserved. 4 * 5 * This program is free software; you can redistribute it and/or 6 * modify it under the terms of the GNU General Public License as 7 * published by the Free Software Foundation. 8 * 9 * This program is distributed in the hope that it would be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * GNU General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program; if not, write the Free Software Foundation, 16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 17 */ 18 #include "xfs.h" 19 #include "xfs_fs.h" 20 #include "xfs_shared.h" 21 #include "xfs_format.h" 22 #include "xfs_log_format.h" 23 #include "xfs_trans_resv.h" 24 #include "xfs_sb.h" 25 #include "xfs_mount.h" 26 #include "xfs_defer.h" 27 #include "xfs_da_format.h" 28 #include "xfs_da_btree.h" 29 #include "xfs_inode.h" 30 #include "xfs_trans.h" 31 #include "xfs_inode_item.h" 32 #include "xfs_error.h" 33 #include "xfs_btree.h" 34 #include "xfs_alloc_btree.h" 35 #include "xfs_alloc.h" 36 #include "xfs_rmap_btree.h" 37 #include "xfs_ialloc.h" 38 #include "xfs_fsops.h" 39 #include "xfs_itable.h" 40 #include "xfs_trans_space.h" 41 #include "xfs_rtalloc.h" 42 #include "xfs_trace.h" 43 #include "xfs_log.h" 44 #include "xfs_filestream.h" 45 #include "xfs_rmap.h" 46 #include "xfs_ag_resv.h" 47 48 /* 49 * File system operations 50 */ 51 52 int 53 xfs_fs_geometry( 54 xfs_mount_t *mp, 55 xfs_fsop_geom_t *geo, 56 int new_version) 57 { 58 59 memset(geo, 0, sizeof(*geo)); 60 61 geo->blocksize = mp->m_sb.sb_blocksize; 62 geo->rtextsize = mp->m_sb.sb_rextsize; 63 geo->agblocks = mp->m_sb.sb_agblocks; 64 geo->agcount = mp->m_sb.sb_agcount; 65 geo->logblocks = mp->m_sb.sb_logblocks; 66 geo->sectsize = mp->m_sb.sb_sectsize; 67 geo->inodesize = mp->m_sb.sb_inodesize; 68 geo->imaxpct = mp->m_sb.sb_imax_pct; 69 geo->datablocks = mp->m_sb.sb_dblocks; 70 geo->rtblocks = mp->m_sb.sb_rblocks; 71 geo->rtextents = mp->m_sb.sb_rextents; 72 geo->logstart = mp->m_sb.sb_logstart; 73 ASSERT(sizeof(geo->uuid)==sizeof(mp->m_sb.sb_uuid)); 74 memcpy(geo->uuid, &mp->m_sb.sb_uuid, sizeof(mp->m_sb.sb_uuid)); 75 if (new_version >= 2) { 76 geo->sunit = mp->m_sb.sb_unit; 77 geo->swidth = mp->m_sb.sb_width; 78 } 79 if (new_version >= 3) { 80 geo->version = XFS_FSOP_GEOM_VERSION; 81 geo->flags = XFS_FSOP_GEOM_FLAGS_NLINK | 82 XFS_FSOP_GEOM_FLAGS_DIRV2 | 83 (xfs_sb_version_hasattr(&mp->m_sb) ? 84 XFS_FSOP_GEOM_FLAGS_ATTR : 0) | 85 (xfs_sb_version_hasquota(&mp->m_sb) ? 86 XFS_FSOP_GEOM_FLAGS_QUOTA : 0) | 87 (xfs_sb_version_hasalign(&mp->m_sb) ? 88 XFS_FSOP_GEOM_FLAGS_IALIGN : 0) | 89 (xfs_sb_version_hasdalign(&mp->m_sb) ? 90 XFS_FSOP_GEOM_FLAGS_DALIGN : 0) | 91 (xfs_sb_version_hasextflgbit(&mp->m_sb) ? 92 XFS_FSOP_GEOM_FLAGS_EXTFLG : 0) | 93 (xfs_sb_version_hassector(&mp->m_sb) ? 94 XFS_FSOP_GEOM_FLAGS_SECTOR : 0) | 95 (xfs_sb_version_hasasciici(&mp->m_sb) ? 96 XFS_FSOP_GEOM_FLAGS_DIRV2CI : 0) | 97 (xfs_sb_version_haslazysbcount(&mp->m_sb) ? 98 XFS_FSOP_GEOM_FLAGS_LAZYSB : 0) | 99 (xfs_sb_version_hasattr2(&mp->m_sb) ? 100 XFS_FSOP_GEOM_FLAGS_ATTR2 : 0) | 101 (xfs_sb_version_hasprojid32bit(&mp->m_sb) ? 102 XFS_FSOP_GEOM_FLAGS_PROJID32 : 0) | 103 (xfs_sb_version_hascrc(&mp->m_sb) ? 104 XFS_FSOP_GEOM_FLAGS_V5SB : 0) | 105 (xfs_sb_version_hasftype(&mp->m_sb) ? 106 XFS_FSOP_GEOM_FLAGS_FTYPE : 0) | 107 (xfs_sb_version_hasfinobt(&mp->m_sb) ? 108 XFS_FSOP_GEOM_FLAGS_FINOBT : 0) | 109 (xfs_sb_version_hassparseinodes(&mp->m_sb) ? 110 XFS_FSOP_GEOM_FLAGS_SPINODES : 0) | 111 (xfs_sb_version_hasrmapbt(&mp->m_sb) ? 112 XFS_FSOP_GEOM_FLAGS_RMAPBT : 0) | 113 (xfs_sb_version_hasreflink(&mp->m_sb) ? 114 XFS_FSOP_GEOM_FLAGS_REFLINK : 0); 115 geo->logsectsize = xfs_sb_version_hassector(&mp->m_sb) ? 116 mp->m_sb.sb_logsectsize : BBSIZE; 117 geo->rtsectsize = mp->m_sb.sb_blocksize; 118 geo->dirblocksize = mp->m_dir_geo->blksize; 119 } 120 if (new_version >= 4) { 121 geo->flags |= 122 (xfs_sb_version_haslogv2(&mp->m_sb) ? 123 XFS_FSOP_GEOM_FLAGS_LOGV2 : 0); 124 geo->logsunit = mp->m_sb.sb_logsunit; 125 } 126 return 0; 127 } 128 129 static struct xfs_buf * 130 xfs_growfs_get_hdr_buf( 131 struct xfs_mount *mp, 132 xfs_daddr_t blkno, 133 size_t numblks, 134 int flags, 135 const struct xfs_buf_ops *ops) 136 { 137 struct xfs_buf *bp; 138 139 bp = xfs_buf_get_uncached(mp->m_ddev_targp, numblks, flags); 140 if (!bp) 141 return NULL; 142 143 xfs_buf_zero(bp, 0, BBTOB(bp->b_length)); 144 bp->b_bn = blkno; 145 bp->b_maps[0].bm_bn = blkno; 146 bp->b_ops = ops; 147 148 return bp; 149 } 150 151 static int 152 xfs_growfs_data_private( 153 xfs_mount_t *mp, /* mount point for filesystem */ 154 xfs_growfs_data_t *in) /* growfs data input struct */ 155 { 156 xfs_agf_t *agf; 157 struct xfs_agfl *agfl; 158 xfs_agi_t *agi; 159 xfs_agnumber_t agno; 160 xfs_extlen_t agsize; 161 xfs_extlen_t tmpsize; 162 xfs_alloc_rec_t *arec; 163 xfs_buf_t *bp; 164 int bucket; 165 int dpct; 166 int error, saved_error = 0; 167 xfs_agnumber_t nagcount; 168 xfs_agnumber_t nagimax = 0; 169 xfs_rfsblock_t nb, nb_mod; 170 xfs_rfsblock_t new; 171 xfs_rfsblock_t nfree; 172 xfs_agnumber_t oagcount; 173 int pct; 174 xfs_trans_t *tp; 175 176 nb = in->newblocks; 177 pct = in->imaxpct; 178 if (nb < mp->m_sb.sb_dblocks || pct < 0 || pct > 100) 179 return -EINVAL; 180 if ((error = xfs_sb_validate_fsb_count(&mp->m_sb, nb))) 181 return error; 182 dpct = pct - mp->m_sb.sb_imax_pct; 183 error = xfs_buf_read_uncached(mp->m_ddev_targp, 184 XFS_FSB_TO_BB(mp, nb) - XFS_FSS_TO_BB(mp, 1), 185 XFS_FSS_TO_BB(mp, 1), 0, &bp, NULL); 186 if (error) 187 return error; 188 xfs_buf_relse(bp); 189 190 new = nb; /* use new as a temporary here */ 191 nb_mod = do_div(new, mp->m_sb.sb_agblocks); 192 nagcount = new + (nb_mod != 0); 193 if (nb_mod && nb_mod < XFS_MIN_AG_BLOCKS) { 194 nagcount--; 195 nb = (xfs_rfsblock_t)nagcount * mp->m_sb.sb_agblocks; 196 if (nb < mp->m_sb.sb_dblocks) 197 return -EINVAL; 198 } 199 new = nb - mp->m_sb.sb_dblocks; 200 oagcount = mp->m_sb.sb_agcount; 201 202 /* allocate the new per-ag structures */ 203 if (nagcount > oagcount) { 204 error = xfs_initialize_perag(mp, nagcount, &nagimax); 205 if (error) 206 return error; 207 } 208 209 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_growdata, 210 XFS_GROWFS_SPACE_RES(mp), 0, XFS_TRANS_RESERVE, &tp); 211 if (error) 212 return error; 213 214 /* 215 * Write new AG headers to disk. Non-transactional, but written 216 * synchronously so they are completed prior to the growfs transaction 217 * being logged. 218 */ 219 nfree = 0; 220 for (agno = nagcount - 1; agno >= oagcount; agno--, new -= agsize) { 221 __be32 *agfl_bno; 222 223 /* 224 * AG freespace header block 225 */ 226 bp = xfs_growfs_get_hdr_buf(mp, 227 XFS_AG_DADDR(mp, agno, XFS_AGF_DADDR(mp)), 228 XFS_FSS_TO_BB(mp, 1), 0, 229 &xfs_agf_buf_ops); 230 if (!bp) { 231 error = -ENOMEM; 232 goto error0; 233 } 234 235 agf = XFS_BUF_TO_AGF(bp); 236 agf->agf_magicnum = cpu_to_be32(XFS_AGF_MAGIC); 237 agf->agf_versionnum = cpu_to_be32(XFS_AGF_VERSION); 238 agf->agf_seqno = cpu_to_be32(agno); 239 if (agno == nagcount - 1) 240 agsize = 241 nb - 242 (agno * (xfs_rfsblock_t)mp->m_sb.sb_agblocks); 243 else 244 agsize = mp->m_sb.sb_agblocks; 245 agf->agf_length = cpu_to_be32(agsize); 246 agf->agf_roots[XFS_BTNUM_BNOi] = cpu_to_be32(XFS_BNO_BLOCK(mp)); 247 agf->agf_roots[XFS_BTNUM_CNTi] = cpu_to_be32(XFS_CNT_BLOCK(mp)); 248 agf->agf_levels[XFS_BTNUM_BNOi] = cpu_to_be32(1); 249 agf->agf_levels[XFS_BTNUM_CNTi] = cpu_to_be32(1); 250 if (xfs_sb_version_hasrmapbt(&mp->m_sb)) { 251 agf->agf_roots[XFS_BTNUM_RMAPi] = 252 cpu_to_be32(XFS_RMAP_BLOCK(mp)); 253 agf->agf_levels[XFS_BTNUM_RMAPi] = cpu_to_be32(1); 254 agf->agf_rmap_blocks = cpu_to_be32(1); 255 } 256 257 agf->agf_flfirst = cpu_to_be32(1); 258 agf->agf_fllast = 0; 259 agf->agf_flcount = 0; 260 tmpsize = agsize - mp->m_ag_prealloc_blocks; 261 agf->agf_freeblks = cpu_to_be32(tmpsize); 262 agf->agf_longest = cpu_to_be32(tmpsize); 263 if (xfs_sb_version_hascrc(&mp->m_sb)) 264 uuid_copy(&agf->agf_uuid, &mp->m_sb.sb_meta_uuid); 265 if (xfs_sb_version_hasreflink(&mp->m_sb)) { 266 agf->agf_refcount_root = cpu_to_be32( 267 xfs_refc_block(mp)); 268 agf->agf_refcount_level = cpu_to_be32(1); 269 agf->agf_refcount_blocks = cpu_to_be32(1); 270 } 271 272 error = xfs_bwrite(bp); 273 xfs_buf_relse(bp); 274 if (error) 275 goto error0; 276 277 /* 278 * AG freelist header block 279 */ 280 bp = xfs_growfs_get_hdr_buf(mp, 281 XFS_AG_DADDR(mp, agno, XFS_AGFL_DADDR(mp)), 282 XFS_FSS_TO_BB(mp, 1), 0, 283 &xfs_agfl_buf_ops); 284 if (!bp) { 285 error = -ENOMEM; 286 goto error0; 287 } 288 289 agfl = XFS_BUF_TO_AGFL(bp); 290 if (xfs_sb_version_hascrc(&mp->m_sb)) { 291 agfl->agfl_magicnum = cpu_to_be32(XFS_AGFL_MAGIC); 292 agfl->agfl_seqno = cpu_to_be32(agno); 293 uuid_copy(&agfl->agfl_uuid, &mp->m_sb.sb_meta_uuid); 294 } 295 296 agfl_bno = XFS_BUF_TO_AGFL_BNO(mp, bp); 297 for (bucket = 0; bucket < XFS_AGFL_SIZE(mp); bucket++) 298 agfl_bno[bucket] = cpu_to_be32(NULLAGBLOCK); 299 300 error = xfs_bwrite(bp); 301 xfs_buf_relse(bp); 302 if (error) 303 goto error0; 304 305 /* 306 * AG inode header block 307 */ 308 bp = xfs_growfs_get_hdr_buf(mp, 309 XFS_AG_DADDR(mp, agno, XFS_AGI_DADDR(mp)), 310 XFS_FSS_TO_BB(mp, 1), 0, 311 &xfs_agi_buf_ops); 312 if (!bp) { 313 error = -ENOMEM; 314 goto error0; 315 } 316 317 agi = XFS_BUF_TO_AGI(bp); 318 agi->agi_magicnum = cpu_to_be32(XFS_AGI_MAGIC); 319 agi->agi_versionnum = cpu_to_be32(XFS_AGI_VERSION); 320 agi->agi_seqno = cpu_to_be32(agno); 321 agi->agi_length = cpu_to_be32(agsize); 322 agi->agi_count = 0; 323 agi->agi_root = cpu_to_be32(XFS_IBT_BLOCK(mp)); 324 agi->agi_level = cpu_to_be32(1); 325 agi->agi_freecount = 0; 326 agi->agi_newino = cpu_to_be32(NULLAGINO); 327 agi->agi_dirino = cpu_to_be32(NULLAGINO); 328 if (xfs_sb_version_hascrc(&mp->m_sb)) 329 uuid_copy(&agi->agi_uuid, &mp->m_sb.sb_meta_uuid); 330 if (xfs_sb_version_hasfinobt(&mp->m_sb)) { 331 agi->agi_free_root = cpu_to_be32(XFS_FIBT_BLOCK(mp)); 332 agi->agi_free_level = cpu_to_be32(1); 333 } 334 for (bucket = 0; bucket < XFS_AGI_UNLINKED_BUCKETS; bucket++) 335 agi->agi_unlinked[bucket] = cpu_to_be32(NULLAGINO); 336 337 error = xfs_bwrite(bp); 338 xfs_buf_relse(bp); 339 if (error) 340 goto error0; 341 342 /* 343 * BNO btree root block 344 */ 345 bp = xfs_growfs_get_hdr_buf(mp, 346 XFS_AGB_TO_DADDR(mp, agno, XFS_BNO_BLOCK(mp)), 347 BTOBB(mp->m_sb.sb_blocksize), 0, 348 &xfs_allocbt_buf_ops); 349 350 if (!bp) { 351 error = -ENOMEM; 352 goto error0; 353 } 354 355 xfs_btree_init_block(mp, bp, XFS_BTNUM_BNO, 0, 1, agno, 0); 356 357 arec = XFS_ALLOC_REC_ADDR(mp, XFS_BUF_TO_BLOCK(bp), 1); 358 arec->ar_startblock = cpu_to_be32(mp->m_ag_prealloc_blocks); 359 arec->ar_blockcount = cpu_to_be32( 360 agsize - be32_to_cpu(arec->ar_startblock)); 361 362 error = xfs_bwrite(bp); 363 xfs_buf_relse(bp); 364 if (error) 365 goto error0; 366 367 /* 368 * CNT btree root block 369 */ 370 bp = xfs_growfs_get_hdr_buf(mp, 371 XFS_AGB_TO_DADDR(mp, agno, XFS_CNT_BLOCK(mp)), 372 BTOBB(mp->m_sb.sb_blocksize), 0, 373 &xfs_allocbt_buf_ops); 374 if (!bp) { 375 error = -ENOMEM; 376 goto error0; 377 } 378 379 xfs_btree_init_block(mp, bp, XFS_BTNUM_CNT, 0, 1, agno, 0); 380 381 arec = XFS_ALLOC_REC_ADDR(mp, XFS_BUF_TO_BLOCK(bp), 1); 382 arec->ar_startblock = cpu_to_be32(mp->m_ag_prealloc_blocks); 383 arec->ar_blockcount = cpu_to_be32( 384 agsize - be32_to_cpu(arec->ar_startblock)); 385 nfree += be32_to_cpu(arec->ar_blockcount); 386 387 error = xfs_bwrite(bp); 388 xfs_buf_relse(bp); 389 if (error) 390 goto error0; 391 392 /* RMAP btree root block */ 393 if (xfs_sb_version_hasrmapbt(&mp->m_sb)) { 394 struct xfs_rmap_rec *rrec; 395 struct xfs_btree_block *block; 396 397 bp = xfs_growfs_get_hdr_buf(mp, 398 XFS_AGB_TO_DADDR(mp, agno, XFS_RMAP_BLOCK(mp)), 399 BTOBB(mp->m_sb.sb_blocksize), 0, 400 &xfs_rmapbt_buf_ops); 401 if (!bp) { 402 error = -ENOMEM; 403 goto error0; 404 } 405 406 xfs_btree_init_block(mp, bp, XFS_BTNUM_RMAP, 0, 0, 407 agno, 0); 408 block = XFS_BUF_TO_BLOCK(bp); 409 410 411 /* 412 * mark the AG header regions as static metadata The BNO 413 * btree block is the first block after the headers, so 414 * it's location defines the size of region the static 415 * metadata consumes. 416 * 417 * Note: unlike mkfs, we never have to account for log 418 * space when growing the data regions 419 */ 420 rrec = XFS_RMAP_REC_ADDR(block, 1); 421 rrec->rm_startblock = 0; 422 rrec->rm_blockcount = cpu_to_be32(XFS_BNO_BLOCK(mp)); 423 rrec->rm_owner = cpu_to_be64(XFS_RMAP_OWN_FS); 424 rrec->rm_offset = 0; 425 be16_add_cpu(&block->bb_numrecs, 1); 426 427 /* account freespace btree root blocks */ 428 rrec = XFS_RMAP_REC_ADDR(block, 2); 429 rrec->rm_startblock = cpu_to_be32(XFS_BNO_BLOCK(mp)); 430 rrec->rm_blockcount = cpu_to_be32(2); 431 rrec->rm_owner = cpu_to_be64(XFS_RMAP_OWN_AG); 432 rrec->rm_offset = 0; 433 be16_add_cpu(&block->bb_numrecs, 1); 434 435 /* account inode btree root blocks */ 436 rrec = XFS_RMAP_REC_ADDR(block, 3); 437 rrec->rm_startblock = cpu_to_be32(XFS_IBT_BLOCK(mp)); 438 rrec->rm_blockcount = cpu_to_be32(XFS_RMAP_BLOCK(mp) - 439 XFS_IBT_BLOCK(mp)); 440 rrec->rm_owner = cpu_to_be64(XFS_RMAP_OWN_INOBT); 441 rrec->rm_offset = 0; 442 be16_add_cpu(&block->bb_numrecs, 1); 443 444 /* account for rmap btree root */ 445 rrec = XFS_RMAP_REC_ADDR(block, 4); 446 rrec->rm_startblock = cpu_to_be32(XFS_RMAP_BLOCK(mp)); 447 rrec->rm_blockcount = cpu_to_be32(1); 448 rrec->rm_owner = cpu_to_be64(XFS_RMAP_OWN_AG); 449 rrec->rm_offset = 0; 450 be16_add_cpu(&block->bb_numrecs, 1); 451 452 /* account for refc btree root */ 453 if (xfs_sb_version_hasreflink(&mp->m_sb)) { 454 rrec = XFS_RMAP_REC_ADDR(block, 5); 455 rrec->rm_startblock = cpu_to_be32( 456 xfs_refc_block(mp)); 457 rrec->rm_blockcount = cpu_to_be32(1); 458 rrec->rm_owner = cpu_to_be64(XFS_RMAP_OWN_REFC); 459 rrec->rm_offset = 0; 460 be16_add_cpu(&block->bb_numrecs, 1); 461 } 462 463 error = xfs_bwrite(bp); 464 xfs_buf_relse(bp); 465 if (error) 466 goto error0; 467 } 468 469 /* 470 * INO btree root block 471 */ 472 bp = xfs_growfs_get_hdr_buf(mp, 473 XFS_AGB_TO_DADDR(mp, agno, XFS_IBT_BLOCK(mp)), 474 BTOBB(mp->m_sb.sb_blocksize), 0, 475 &xfs_inobt_buf_ops); 476 if (!bp) { 477 error = -ENOMEM; 478 goto error0; 479 } 480 481 xfs_btree_init_block(mp, bp, XFS_BTNUM_INO , 0, 0, agno, 0); 482 483 error = xfs_bwrite(bp); 484 xfs_buf_relse(bp); 485 if (error) 486 goto error0; 487 488 /* 489 * FINO btree root block 490 */ 491 if (xfs_sb_version_hasfinobt(&mp->m_sb)) { 492 bp = xfs_growfs_get_hdr_buf(mp, 493 XFS_AGB_TO_DADDR(mp, agno, XFS_FIBT_BLOCK(mp)), 494 BTOBB(mp->m_sb.sb_blocksize), 0, 495 &xfs_inobt_buf_ops); 496 if (!bp) { 497 error = -ENOMEM; 498 goto error0; 499 } 500 501 xfs_btree_init_block(mp, bp, XFS_BTNUM_FINO, 502 0, 0, agno, 0); 503 504 error = xfs_bwrite(bp); 505 xfs_buf_relse(bp); 506 if (error) 507 goto error0; 508 } 509 510 /* 511 * refcount btree root block 512 */ 513 if (xfs_sb_version_hasreflink(&mp->m_sb)) { 514 bp = xfs_growfs_get_hdr_buf(mp, 515 XFS_AGB_TO_DADDR(mp, agno, xfs_refc_block(mp)), 516 BTOBB(mp->m_sb.sb_blocksize), 0, 517 &xfs_refcountbt_buf_ops); 518 if (!bp) { 519 error = -ENOMEM; 520 goto error0; 521 } 522 523 xfs_btree_init_block(mp, bp, XFS_BTNUM_REFC, 524 0, 0, agno, 0); 525 526 error = xfs_bwrite(bp); 527 xfs_buf_relse(bp); 528 if (error) 529 goto error0; 530 } 531 } 532 xfs_trans_agblocks_delta(tp, nfree); 533 /* 534 * There are new blocks in the old last a.g. 535 */ 536 if (new) { 537 struct xfs_owner_info oinfo; 538 539 /* 540 * Change the agi length. 541 */ 542 error = xfs_ialloc_read_agi(mp, tp, agno, &bp); 543 if (error) { 544 goto error0; 545 } 546 ASSERT(bp); 547 agi = XFS_BUF_TO_AGI(bp); 548 be32_add_cpu(&agi->agi_length, new); 549 ASSERT(nagcount == oagcount || 550 be32_to_cpu(agi->agi_length) == mp->m_sb.sb_agblocks); 551 xfs_ialloc_log_agi(tp, bp, XFS_AGI_LENGTH); 552 /* 553 * Change agf length. 554 */ 555 error = xfs_alloc_read_agf(mp, tp, agno, 0, &bp); 556 if (error) { 557 goto error0; 558 } 559 ASSERT(bp); 560 agf = XFS_BUF_TO_AGF(bp); 561 be32_add_cpu(&agf->agf_length, new); 562 ASSERT(be32_to_cpu(agf->agf_length) == 563 be32_to_cpu(agi->agi_length)); 564 565 xfs_alloc_log_agf(tp, bp, XFS_AGF_LENGTH); 566 567 /* 568 * Free the new space. 569 * 570 * XFS_RMAP_OWN_NULL is used here to tell the rmap btree that 571 * this doesn't actually exist in the rmap btree. 572 */ 573 xfs_rmap_ag_owner(&oinfo, XFS_RMAP_OWN_NULL); 574 error = xfs_free_extent(tp, 575 XFS_AGB_TO_FSB(mp, agno, 576 be32_to_cpu(agf->agf_length) - new), 577 new, &oinfo, XFS_AG_RESV_NONE); 578 if (error) 579 goto error0; 580 } 581 582 /* 583 * Update changed superblock fields transactionally. These are not 584 * seen by the rest of the world until the transaction commit applies 585 * them atomically to the superblock. 586 */ 587 if (nagcount > oagcount) 588 xfs_trans_mod_sb(tp, XFS_TRANS_SB_AGCOUNT, nagcount - oagcount); 589 if (nb > mp->m_sb.sb_dblocks) 590 xfs_trans_mod_sb(tp, XFS_TRANS_SB_DBLOCKS, 591 nb - mp->m_sb.sb_dblocks); 592 if (nfree) 593 xfs_trans_mod_sb(tp, XFS_TRANS_SB_FDBLOCKS, nfree); 594 if (dpct) 595 xfs_trans_mod_sb(tp, XFS_TRANS_SB_IMAXPCT, dpct); 596 xfs_trans_set_sync(tp); 597 error = xfs_trans_commit(tp); 598 if (error) 599 return error; 600 601 /* New allocation groups fully initialized, so update mount struct */ 602 if (nagimax) 603 mp->m_maxagi = nagimax; 604 if (mp->m_sb.sb_imax_pct) { 605 __uint64_t icount = mp->m_sb.sb_dblocks * mp->m_sb.sb_imax_pct; 606 do_div(icount, 100); 607 mp->m_maxicount = icount << mp->m_sb.sb_inopblog; 608 } else 609 mp->m_maxicount = 0; 610 xfs_set_low_space_thresholds(mp); 611 mp->m_alloc_set_aside = xfs_alloc_set_aside(mp); 612 613 /* 614 * If we expanded the last AG, free the per-AG reservation 615 * so we can reinitialize it with the new size. 616 */ 617 if (new) { 618 struct xfs_perag *pag; 619 620 pag = xfs_perag_get(mp, agno); 621 error = xfs_ag_resv_free(pag); 622 xfs_perag_put(pag); 623 if (error) 624 goto out; 625 } 626 627 /* Reserve AG metadata blocks. */ 628 error = xfs_fs_reserve_ag_blocks(mp); 629 if (error && error != -ENOSPC) 630 goto out; 631 632 /* update secondary superblocks. */ 633 for (agno = 1; agno < nagcount; agno++) { 634 error = 0; 635 /* 636 * new secondary superblocks need to be zeroed, not read from 637 * disk as the contents of the new area we are growing into is 638 * completely unknown. 639 */ 640 if (agno < oagcount) { 641 error = xfs_trans_read_buf(mp, NULL, mp->m_ddev_targp, 642 XFS_AGB_TO_DADDR(mp, agno, XFS_SB_BLOCK(mp)), 643 XFS_FSS_TO_BB(mp, 1), 0, &bp, 644 &xfs_sb_buf_ops); 645 } else { 646 bp = xfs_trans_get_buf(NULL, mp->m_ddev_targp, 647 XFS_AGB_TO_DADDR(mp, agno, XFS_SB_BLOCK(mp)), 648 XFS_FSS_TO_BB(mp, 1), 0); 649 if (bp) { 650 bp->b_ops = &xfs_sb_buf_ops; 651 xfs_buf_zero(bp, 0, BBTOB(bp->b_length)); 652 } else 653 error = -ENOMEM; 654 } 655 656 /* 657 * If we get an error reading or writing alternate superblocks, 658 * continue. xfs_repair chooses the "best" superblock based 659 * on most matches; if we break early, we'll leave more 660 * superblocks un-updated than updated, and xfs_repair may 661 * pick them over the properly-updated primary. 662 */ 663 if (error) { 664 xfs_warn(mp, 665 "error %d reading secondary superblock for ag %d", 666 error, agno); 667 saved_error = error; 668 continue; 669 } 670 xfs_sb_to_disk(XFS_BUF_TO_SBP(bp), &mp->m_sb); 671 672 error = xfs_bwrite(bp); 673 xfs_buf_relse(bp); 674 if (error) { 675 xfs_warn(mp, 676 "write error %d updating secondary superblock for ag %d", 677 error, agno); 678 saved_error = error; 679 continue; 680 } 681 } 682 683 out: 684 return saved_error ? saved_error : error; 685 686 error0: 687 xfs_trans_cancel(tp); 688 return error; 689 } 690 691 static int 692 xfs_growfs_log_private( 693 xfs_mount_t *mp, /* mount point for filesystem */ 694 xfs_growfs_log_t *in) /* growfs log input struct */ 695 { 696 xfs_extlen_t nb; 697 698 nb = in->newblocks; 699 if (nb < XFS_MIN_LOG_BLOCKS || nb < XFS_B_TO_FSB(mp, XFS_MIN_LOG_BYTES)) 700 return -EINVAL; 701 if (nb == mp->m_sb.sb_logblocks && 702 in->isint == (mp->m_sb.sb_logstart != 0)) 703 return -EINVAL; 704 /* 705 * Moving the log is hard, need new interfaces to sync 706 * the log first, hold off all activity while moving it. 707 * Can have shorter or longer log in the same space, 708 * or transform internal to external log or vice versa. 709 */ 710 return -ENOSYS; 711 } 712 713 /* 714 * protected versions of growfs function acquire and release locks on the mount 715 * point - exported through ioctls: XFS_IOC_FSGROWFSDATA, XFS_IOC_FSGROWFSLOG, 716 * XFS_IOC_FSGROWFSRT 717 */ 718 719 720 int 721 xfs_growfs_data( 722 xfs_mount_t *mp, 723 xfs_growfs_data_t *in) 724 { 725 int error; 726 727 if (!capable(CAP_SYS_ADMIN)) 728 return -EPERM; 729 if (!mutex_trylock(&mp->m_growlock)) 730 return -EWOULDBLOCK; 731 error = xfs_growfs_data_private(mp, in); 732 /* 733 * Increment the generation unconditionally, the error could be from 734 * updating the secondary superblocks, in which case the new size 735 * is live already. 736 */ 737 mp->m_generation++; 738 mutex_unlock(&mp->m_growlock); 739 return error; 740 } 741 742 int 743 xfs_growfs_log( 744 xfs_mount_t *mp, 745 xfs_growfs_log_t *in) 746 { 747 int error; 748 749 if (!capable(CAP_SYS_ADMIN)) 750 return -EPERM; 751 if (!mutex_trylock(&mp->m_growlock)) 752 return -EWOULDBLOCK; 753 error = xfs_growfs_log_private(mp, in); 754 mutex_unlock(&mp->m_growlock); 755 return error; 756 } 757 758 /* 759 * exported through ioctl XFS_IOC_FSCOUNTS 760 */ 761 762 int 763 xfs_fs_counts( 764 xfs_mount_t *mp, 765 xfs_fsop_counts_t *cnt) 766 { 767 cnt->allocino = percpu_counter_read_positive(&mp->m_icount); 768 cnt->freeino = percpu_counter_read_positive(&mp->m_ifree); 769 cnt->freedata = percpu_counter_read_positive(&mp->m_fdblocks) - 770 mp->m_alloc_set_aside; 771 772 spin_lock(&mp->m_sb_lock); 773 cnt->freertx = mp->m_sb.sb_frextents; 774 spin_unlock(&mp->m_sb_lock); 775 return 0; 776 } 777 778 /* 779 * exported through ioctl XFS_IOC_SET_RESBLKS & XFS_IOC_GET_RESBLKS 780 * 781 * xfs_reserve_blocks is called to set m_resblks 782 * in the in-core mount table. The number of unused reserved blocks 783 * is kept in m_resblks_avail. 784 * 785 * Reserve the requested number of blocks if available. Otherwise return 786 * as many as possible to satisfy the request. The actual number 787 * reserved are returned in outval 788 * 789 * A null inval pointer indicates that only the current reserved blocks 790 * available should be returned no settings are changed. 791 */ 792 793 int 794 xfs_reserve_blocks( 795 xfs_mount_t *mp, 796 __uint64_t *inval, 797 xfs_fsop_resblks_t *outval) 798 { 799 __int64_t lcounter, delta; 800 __int64_t fdblks_delta = 0; 801 __uint64_t request; 802 __int64_t free; 803 int error = 0; 804 805 /* If inval is null, report current values and return */ 806 if (inval == (__uint64_t *)NULL) { 807 if (!outval) 808 return -EINVAL; 809 outval->resblks = mp->m_resblks; 810 outval->resblks_avail = mp->m_resblks_avail; 811 return 0; 812 } 813 814 request = *inval; 815 816 /* 817 * With per-cpu counters, this becomes an interesting problem. we need 818 * to work out if we are freeing or allocation blocks first, then we can 819 * do the modification as necessary. 820 * 821 * We do this under the m_sb_lock so that if we are near ENOSPC, we will 822 * hold out any changes while we work out what to do. This means that 823 * the amount of free space can change while we do this, so we need to 824 * retry if we end up trying to reserve more space than is available. 825 */ 826 spin_lock(&mp->m_sb_lock); 827 828 /* 829 * If our previous reservation was larger than the current value, 830 * then move any unused blocks back to the free pool. Modify the resblks 831 * counters directly since we shouldn't have any problems unreserving 832 * space. 833 */ 834 if (mp->m_resblks > request) { 835 lcounter = mp->m_resblks_avail - request; 836 if (lcounter > 0) { /* release unused blocks */ 837 fdblks_delta = lcounter; 838 mp->m_resblks_avail -= lcounter; 839 } 840 mp->m_resblks = request; 841 if (fdblks_delta) { 842 spin_unlock(&mp->m_sb_lock); 843 error = xfs_mod_fdblocks(mp, fdblks_delta, 0); 844 spin_lock(&mp->m_sb_lock); 845 } 846 847 goto out; 848 } 849 850 /* 851 * If the request is larger than the current reservation, reserve the 852 * blocks before we update the reserve counters. Sample m_fdblocks and 853 * perform a partial reservation if the request exceeds free space. 854 */ 855 error = -ENOSPC; 856 do { 857 free = percpu_counter_sum(&mp->m_fdblocks) - 858 mp->m_alloc_set_aside; 859 if (!free) 860 break; 861 862 delta = request - mp->m_resblks; 863 lcounter = free - delta; 864 if (lcounter < 0) 865 /* We can't satisfy the request, just get what we can */ 866 fdblks_delta = free; 867 else 868 fdblks_delta = delta; 869 870 /* 871 * We'll either succeed in getting space from the free block 872 * count or we'll get an ENOSPC. If we get a ENOSPC, it means 873 * things changed while we were calculating fdblks_delta and so 874 * we should try again to see if there is anything left to 875 * reserve. 876 * 877 * Don't set the reserved flag here - we don't want to reserve 878 * the extra reserve blocks from the reserve..... 879 */ 880 spin_unlock(&mp->m_sb_lock); 881 error = xfs_mod_fdblocks(mp, -fdblks_delta, 0); 882 spin_lock(&mp->m_sb_lock); 883 } while (error == -ENOSPC); 884 885 /* 886 * Update the reserve counters if blocks have been successfully 887 * allocated. 888 */ 889 if (!error && fdblks_delta) { 890 mp->m_resblks += fdblks_delta; 891 mp->m_resblks_avail += fdblks_delta; 892 } 893 894 out: 895 if (outval) { 896 outval->resblks = mp->m_resblks; 897 outval->resblks_avail = mp->m_resblks_avail; 898 } 899 900 spin_unlock(&mp->m_sb_lock); 901 return error; 902 } 903 904 int 905 xfs_fs_goingdown( 906 xfs_mount_t *mp, 907 __uint32_t inflags) 908 { 909 switch (inflags) { 910 case XFS_FSOP_GOING_FLAGS_DEFAULT: { 911 struct super_block *sb = freeze_bdev(mp->m_super->s_bdev); 912 913 if (sb && !IS_ERR(sb)) { 914 xfs_force_shutdown(mp, SHUTDOWN_FORCE_UMOUNT); 915 thaw_bdev(sb->s_bdev, sb); 916 } 917 918 break; 919 } 920 case XFS_FSOP_GOING_FLAGS_LOGFLUSH: 921 xfs_force_shutdown(mp, SHUTDOWN_FORCE_UMOUNT); 922 break; 923 case XFS_FSOP_GOING_FLAGS_NOLOGFLUSH: 924 xfs_force_shutdown(mp, 925 SHUTDOWN_FORCE_UMOUNT | SHUTDOWN_LOG_IO_ERROR); 926 break; 927 default: 928 return -EINVAL; 929 } 930 931 return 0; 932 } 933 934 /* 935 * Force a shutdown of the filesystem instantly while keeping the filesystem 936 * consistent. We don't do an unmount here; just shutdown the shop, make sure 937 * that absolutely nothing persistent happens to this filesystem after this 938 * point. 939 */ 940 void 941 xfs_do_force_shutdown( 942 xfs_mount_t *mp, 943 int flags, 944 char *fname, 945 int lnnum) 946 { 947 int logerror; 948 949 logerror = flags & SHUTDOWN_LOG_IO_ERROR; 950 951 if (!(flags & SHUTDOWN_FORCE_UMOUNT)) { 952 xfs_notice(mp, 953 "%s(0x%x) called from line %d of file %s. Return address = 0x%p", 954 __func__, flags, lnnum, fname, __return_address); 955 } 956 /* 957 * No need to duplicate efforts. 958 */ 959 if (XFS_FORCED_SHUTDOWN(mp) && !logerror) 960 return; 961 962 /* 963 * This flags XFS_MOUNT_FS_SHUTDOWN, makes sure that we don't 964 * queue up anybody new on the log reservations, and wakes up 965 * everybody who's sleeping on log reservations to tell them 966 * the bad news. 967 */ 968 if (xfs_log_force_umount(mp, logerror)) 969 return; 970 971 if (flags & SHUTDOWN_CORRUPT_INCORE) { 972 xfs_alert_tag(mp, XFS_PTAG_SHUTDOWN_CORRUPT, 973 "Corruption of in-memory data detected. Shutting down filesystem"); 974 if (XFS_ERRLEVEL_HIGH <= xfs_error_level) 975 xfs_stack_trace(); 976 } else if (!(flags & SHUTDOWN_FORCE_UMOUNT)) { 977 if (logerror) { 978 xfs_alert_tag(mp, XFS_PTAG_SHUTDOWN_LOGERROR, 979 "Log I/O Error Detected. Shutting down filesystem"); 980 } else if (flags & SHUTDOWN_DEVICE_REQ) { 981 xfs_alert_tag(mp, XFS_PTAG_SHUTDOWN_IOERROR, 982 "All device paths lost. Shutting down filesystem"); 983 } else if (!(flags & SHUTDOWN_REMOTE_REQ)) { 984 xfs_alert_tag(mp, XFS_PTAG_SHUTDOWN_IOERROR, 985 "I/O Error Detected. Shutting down filesystem"); 986 } 987 } 988 if (!(flags & SHUTDOWN_FORCE_UMOUNT)) { 989 xfs_alert(mp, 990 "Please umount the filesystem and rectify the problem(s)"); 991 } 992 } 993 994 /* 995 * Reserve free space for per-AG metadata. 996 */ 997 int 998 xfs_fs_reserve_ag_blocks( 999 struct xfs_mount *mp) 1000 { 1001 xfs_agnumber_t agno; 1002 struct xfs_perag *pag; 1003 int error = 0; 1004 int err2; 1005 1006 for (agno = 0; agno < mp->m_sb.sb_agcount; agno++) { 1007 pag = xfs_perag_get(mp, agno); 1008 err2 = xfs_ag_resv_init(pag); 1009 xfs_perag_put(pag); 1010 if (err2 && !error) 1011 error = err2; 1012 } 1013 1014 if (error && error != -ENOSPC) { 1015 xfs_warn(mp, 1016 "Error %d reserving per-AG metadata reserve pool.", error); 1017 xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE); 1018 } 1019 1020 return error; 1021 } 1022 1023 /* 1024 * Free space reserved for per-AG metadata. 1025 */ 1026 int 1027 xfs_fs_unreserve_ag_blocks( 1028 struct xfs_mount *mp) 1029 { 1030 xfs_agnumber_t agno; 1031 struct xfs_perag *pag; 1032 int error = 0; 1033 int err2; 1034 1035 for (agno = 0; agno < mp->m_sb.sb_agcount; agno++) { 1036 pag = xfs_perag_get(mp, agno); 1037 err2 = xfs_ag_resv_free(pag); 1038 xfs_perag_put(pag); 1039 if (err2 && !error) 1040 error = err2; 1041 } 1042 1043 if (error) 1044 xfs_warn(mp, 1045 "Error %d freeing per-AG metadata reserve pool.", error); 1046 1047 return error; 1048 } 1049