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