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 agf->agf_rmap_blocks = cpu_to_be32(1); 252 } 253 254 agf->agf_flfirst = cpu_to_be32(1); 255 agf->agf_fllast = 0; 256 agf->agf_flcount = 0; 257 tmpsize = agsize - mp->m_ag_prealloc_blocks; 258 agf->agf_freeblks = cpu_to_be32(tmpsize); 259 agf->agf_longest = cpu_to_be32(tmpsize); 260 if (xfs_sb_version_hascrc(&mp->m_sb)) 261 uuid_copy(&agf->agf_uuid, &mp->m_sb.sb_meta_uuid); 262 263 error = xfs_bwrite(bp); 264 xfs_buf_relse(bp); 265 if (error) 266 goto error0; 267 268 /* 269 * AG freelist header block 270 */ 271 bp = xfs_growfs_get_hdr_buf(mp, 272 XFS_AG_DADDR(mp, agno, XFS_AGFL_DADDR(mp)), 273 XFS_FSS_TO_BB(mp, 1), 0, 274 &xfs_agfl_buf_ops); 275 if (!bp) { 276 error = -ENOMEM; 277 goto error0; 278 } 279 280 agfl = XFS_BUF_TO_AGFL(bp); 281 if (xfs_sb_version_hascrc(&mp->m_sb)) { 282 agfl->agfl_magicnum = cpu_to_be32(XFS_AGFL_MAGIC); 283 agfl->agfl_seqno = cpu_to_be32(agno); 284 uuid_copy(&agfl->agfl_uuid, &mp->m_sb.sb_meta_uuid); 285 } 286 287 agfl_bno = XFS_BUF_TO_AGFL_BNO(mp, bp); 288 for (bucket = 0; bucket < XFS_AGFL_SIZE(mp); bucket++) 289 agfl_bno[bucket] = cpu_to_be32(NULLAGBLOCK); 290 291 error = xfs_bwrite(bp); 292 xfs_buf_relse(bp); 293 if (error) 294 goto error0; 295 296 /* 297 * AG inode header block 298 */ 299 bp = xfs_growfs_get_hdr_buf(mp, 300 XFS_AG_DADDR(mp, agno, XFS_AGI_DADDR(mp)), 301 XFS_FSS_TO_BB(mp, 1), 0, 302 &xfs_agi_buf_ops); 303 if (!bp) { 304 error = -ENOMEM; 305 goto error0; 306 } 307 308 agi = XFS_BUF_TO_AGI(bp); 309 agi->agi_magicnum = cpu_to_be32(XFS_AGI_MAGIC); 310 agi->agi_versionnum = cpu_to_be32(XFS_AGI_VERSION); 311 agi->agi_seqno = cpu_to_be32(agno); 312 agi->agi_length = cpu_to_be32(agsize); 313 agi->agi_count = 0; 314 agi->agi_root = cpu_to_be32(XFS_IBT_BLOCK(mp)); 315 agi->agi_level = cpu_to_be32(1); 316 agi->agi_freecount = 0; 317 agi->agi_newino = cpu_to_be32(NULLAGINO); 318 agi->agi_dirino = cpu_to_be32(NULLAGINO); 319 if (xfs_sb_version_hascrc(&mp->m_sb)) 320 uuid_copy(&agi->agi_uuid, &mp->m_sb.sb_meta_uuid); 321 if (xfs_sb_version_hasfinobt(&mp->m_sb)) { 322 agi->agi_free_root = cpu_to_be32(XFS_FIBT_BLOCK(mp)); 323 agi->agi_free_level = cpu_to_be32(1); 324 } 325 for (bucket = 0; bucket < XFS_AGI_UNLINKED_BUCKETS; bucket++) 326 agi->agi_unlinked[bucket] = cpu_to_be32(NULLAGINO); 327 328 error = xfs_bwrite(bp); 329 xfs_buf_relse(bp); 330 if (error) 331 goto error0; 332 333 /* 334 * BNO btree root block 335 */ 336 bp = xfs_growfs_get_hdr_buf(mp, 337 XFS_AGB_TO_DADDR(mp, agno, XFS_BNO_BLOCK(mp)), 338 BTOBB(mp->m_sb.sb_blocksize), 0, 339 &xfs_allocbt_buf_ops); 340 341 if (!bp) { 342 error = -ENOMEM; 343 goto error0; 344 } 345 346 if (xfs_sb_version_hascrc(&mp->m_sb)) 347 xfs_btree_init_block(mp, bp, XFS_ABTB_CRC_MAGIC, 0, 1, 348 agno, XFS_BTREE_CRC_BLOCKS); 349 else 350 xfs_btree_init_block(mp, bp, XFS_ABTB_MAGIC, 0, 1, 351 agno, 0); 352 353 arec = XFS_ALLOC_REC_ADDR(mp, XFS_BUF_TO_BLOCK(bp), 1); 354 arec->ar_startblock = cpu_to_be32(mp->m_ag_prealloc_blocks); 355 arec->ar_blockcount = cpu_to_be32( 356 agsize - be32_to_cpu(arec->ar_startblock)); 357 358 error = xfs_bwrite(bp); 359 xfs_buf_relse(bp); 360 if (error) 361 goto error0; 362 363 /* 364 * CNT btree root block 365 */ 366 bp = xfs_growfs_get_hdr_buf(mp, 367 XFS_AGB_TO_DADDR(mp, agno, XFS_CNT_BLOCK(mp)), 368 BTOBB(mp->m_sb.sb_blocksize), 0, 369 &xfs_allocbt_buf_ops); 370 if (!bp) { 371 error = -ENOMEM; 372 goto error0; 373 } 374 375 if (xfs_sb_version_hascrc(&mp->m_sb)) 376 xfs_btree_init_block(mp, bp, XFS_ABTC_CRC_MAGIC, 0, 1, 377 agno, XFS_BTREE_CRC_BLOCKS); 378 else 379 xfs_btree_init_block(mp, bp, XFS_ABTC_MAGIC, 0, 1, 380 agno, 0); 381 382 arec = XFS_ALLOC_REC_ADDR(mp, XFS_BUF_TO_BLOCK(bp), 1); 383 arec->ar_startblock = cpu_to_be32(mp->m_ag_prealloc_blocks); 384 arec->ar_blockcount = cpu_to_be32( 385 agsize - be32_to_cpu(arec->ar_startblock)); 386 nfree += be32_to_cpu(arec->ar_blockcount); 387 388 error = xfs_bwrite(bp); 389 xfs_buf_relse(bp); 390 if (error) 391 goto error0; 392 393 /* RMAP btree root block */ 394 if (xfs_sb_version_hasrmapbt(&mp->m_sb)) { 395 struct xfs_rmap_rec *rrec; 396 struct xfs_btree_block *block; 397 398 bp = xfs_growfs_get_hdr_buf(mp, 399 XFS_AGB_TO_DADDR(mp, agno, XFS_RMAP_BLOCK(mp)), 400 BTOBB(mp->m_sb.sb_blocksize), 0, 401 &xfs_rmapbt_buf_ops); 402 if (!bp) { 403 error = -ENOMEM; 404 goto error0; 405 } 406 407 xfs_btree_init_block(mp, bp, XFS_RMAP_CRC_MAGIC, 0, 0, 408 agno, XFS_BTREE_CRC_BLOCKS); 409 block = XFS_BUF_TO_BLOCK(bp); 410 411 412 /* 413 * mark the AG header regions as static metadata The BNO 414 * btree block is the first block after the headers, so 415 * it's location defines the size of region the static 416 * metadata consumes. 417 * 418 * Note: unlike mkfs, we never have to account for log 419 * space when growing the data regions 420 */ 421 rrec = XFS_RMAP_REC_ADDR(block, 1); 422 rrec->rm_startblock = 0; 423 rrec->rm_blockcount = cpu_to_be32(XFS_BNO_BLOCK(mp)); 424 rrec->rm_owner = cpu_to_be64(XFS_RMAP_OWN_FS); 425 rrec->rm_offset = 0; 426 be16_add_cpu(&block->bb_numrecs, 1); 427 428 /* account freespace btree root blocks */ 429 rrec = XFS_RMAP_REC_ADDR(block, 2); 430 rrec->rm_startblock = cpu_to_be32(XFS_BNO_BLOCK(mp)); 431 rrec->rm_blockcount = cpu_to_be32(2); 432 rrec->rm_owner = cpu_to_be64(XFS_RMAP_OWN_AG); 433 rrec->rm_offset = 0; 434 be16_add_cpu(&block->bb_numrecs, 1); 435 436 /* account inode btree root blocks */ 437 rrec = XFS_RMAP_REC_ADDR(block, 3); 438 rrec->rm_startblock = cpu_to_be32(XFS_IBT_BLOCK(mp)); 439 rrec->rm_blockcount = cpu_to_be32(XFS_RMAP_BLOCK(mp) - 440 XFS_IBT_BLOCK(mp)); 441 rrec->rm_owner = cpu_to_be64(XFS_RMAP_OWN_INOBT); 442 rrec->rm_offset = 0; 443 be16_add_cpu(&block->bb_numrecs, 1); 444 445 /* account for rmap btree root */ 446 rrec = XFS_RMAP_REC_ADDR(block, 4); 447 rrec->rm_startblock = cpu_to_be32(XFS_RMAP_BLOCK(mp)); 448 rrec->rm_blockcount = cpu_to_be32(1); 449 rrec->rm_owner = cpu_to_be64(XFS_RMAP_OWN_AG); 450 rrec->rm_offset = 0; 451 be16_add_cpu(&block->bb_numrecs, 1); 452 453 error = xfs_bwrite(bp); 454 xfs_buf_relse(bp); 455 if (error) 456 goto error0; 457 } 458 459 /* 460 * INO btree root block 461 */ 462 bp = xfs_growfs_get_hdr_buf(mp, 463 XFS_AGB_TO_DADDR(mp, agno, XFS_IBT_BLOCK(mp)), 464 BTOBB(mp->m_sb.sb_blocksize), 0, 465 &xfs_inobt_buf_ops); 466 if (!bp) { 467 error = -ENOMEM; 468 goto error0; 469 } 470 471 if (xfs_sb_version_hascrc(&mp->m_sb)) 472 xfs_btree_init_block(mp, bp, XFS_IBT_CRC_MAGIC, 0, 0, 473 agno, XFS_BTREE_CRC_BLOCKS); 474 else 475 xfs_btree_init_block(mp, bp, XFS_IBT_MAGIC, 0, 0, 476 agno, 0); 477 478 error = xfs_bwrite(bp); 479 xfs_buf_relse(bp); 480 if (error) 481 goto error0; 482 483 /* 484 * FINO btree root block 485 */ 486 if (xfs_sb_version_hasfinobt(&mp->m_sb)) { 487 bp = xfs_growfs_get_hdr_buf(mp, 488 XFS_AGB_TO_DADDR(mp, agno, XFS_FIBT_BLOCK(mp)), 489 BTOBB(mp->m_sb.sb_blocksize), 0, 490 &xfs_inobt_buf_ops); 491 if (!bp) { 492 error = -ENOMEM; 493 goto error0; 494 } 495 496 if (xfs_sb_version_hascrc(&mp->m_sb)) 497 xfs_btree_init_block(mp, bp, XFS_FIBT_CRC_MAGIC, 498 0, 0, agno, 499 XFS_BTREE_CRC_BLOCKS); 500 else 501 xfs_btree_init_block(mp, bp, XFS_FIBT_MAGIC, 0, 502 0, agno, 0); 503 504 error = xfs_bwrite(bp); 505 xfs_buf_relse(bp); 506 if (error) 507 goto error0; 508 } 509 510 } 511 xfs_trans_agblocks_delta(tp, nfree); 512 /* 513 * There are new blocks in the old last a.g. 514 */ 515 if (new) { 516 struct xfs_owner_info oinfo; 517 518 /* 519 * Change the agi length. 520 */ 521 error = xfs_ialloc_read_agi(mp, tp, agno, &bp); 522 if (error) { 523 goto error0; 524 } 525 ASSERT(bp); 526 agi = XFS_BUF_TO_AGI(bp); 527 be32_add_cpu(&agi->agi_length, new); 528 ASSERT(nagcount == oagcount || 529 be32_to_cpu(agi->agi_length) == mp->m_sb.sb_agblocks); 530 xfs_ialloc_log_agi(tp, bp, XFS_AGI_LENGTH); 531 /* 532 * Change agf length. 533 */ 534 error = xfs_alloc_read_agf(mp, tp, agno, 0, &bp); 535 if (error) { 536 goto error0; 537 } 538 ASSERT(bp); 539 agf = XFS_BUF_TO_AGF(bp); 540 be32_add_cpu(&agf->agf_length, new); 541 ASSERT(be32_to_cpu(agf->agf_length) == 542 be32_to_cpu(agi->agi_length)); 543 544 xfs_alloc_log_agf(tp, bp, XFS_AGF_LENGTH); 545 546 /* 547 * Free the new space. 548 * 549 * XFS_RMAP_OWN_NULL is used here to tell the rmap btree that 550 * this doesn't actually exist in the rmap btree. 551 */ 552 xfs_rmap_ag_owner(&oinfo, XFS_RMAP_OWN_NULL); 553 error = xfs_free_extent(tp, 554 XFS_AGB_TO_FSB(mp, agno, 555 be32_to_cpu(agf->agf_length) - new), 556 new, &oinfo); 557 if (error) 558 goto error0; 559 } 560 561 /* 562 * Update changed superblock fields transactionally. These are not 563 * seen by the rest of the world until the transaction commit applies 564 * them atomically to the superblock. 565 */ 566 if (nagcount > oagcount) 567 xfs_trans_mod_sb(tp, XFS_TRANS_SB_AGCOUNT, nagcount - oagcount); 568 if (nb > mp->m_sb.sb_dblocks) 569 xfs_trans_mod_sb(tp, XFS_TRANS_SB_DBLOCKS, 570 nb - mp->m_sb.sb_dblocks); 571 if (nfree) 572 xfs_trans_mod_sb(tp, XFS_TRANS_SB_FDBLOCKS, nfree); 573 if (dpct) 574 xfs_trans_mod_sb(tp, XFS_TRANS_SB_IMAXPCT, dpct); 575 xfs_trans_set_sync(tp); 576 error = xfs_trans_commit(tp); 577 if (error) 578 return error; 579 580 /* New allocation groups fully initialized, so update mount struct */ 581 if (nagimax) 582 mp->m_maxagi = nagimax; 583 if (mp->m_sb.sb_imax_pct) { 584 __uint64_t icount = mp->m_sb.sb_dblocks * mp->m_sb.sb_imax_pct; 585 do_div(icount, 100); 586 mp->m_maxicount = icount << mp->m_sb.sb_inopblog; 587 } else 588 mp->m_maxicount = 0; 589 xfs_set_low_space_thresholds(mp); 590 mp->m_alloc_set_aside = xfs_alloc_set_aside(mp); 591 592 /* update secondary superblocks. */ 593 for (agno = 1; agno < nagcount; agno++) { 594 error = 0; 595 /* 596 * new secondary superblocks need to be zeroed, not read from 597 * disk as the contents of the new area we are growing into is 598 * completely unknown. 599 */ 600 if (agno < oagcount) { 601 error = xfs_trans_read_buf(mp, NULL, mp->m_ddev_targp, 602 XFS_AGB_TO_DADDR(mp, agno, XFS_SB_BLOCK(mp)), 603 XFS_FSS_TO_BB(mp, 1), 0, &bp, 604 &xfs_sb_buf_ops); 605 } else { 606 bp = xfs_trans_get_buf(NULL, mp->m_ddev_targp, 607 XFS_AGB_TO_DADDR(mp, agno, XFS_SB_BLOCK(mp)), 608 XFS_FSS_TO_BB(mp, 1), 0); 609 if (bp) { 610 bp->b_ops = &xfs_sb_buf_ops; 611 xfs_buf_zero(bp, 0, BBTOB(bp->b_length)); 612 } else 613 error = -ENOMEM; 614 } 615 616 /* 617 * If we get an error reading or writing alternate superblocks, 618 * continue. xfs_repair chooses the "best" superblock based 619 * on most matches; if we break early, we'll leave more 620 * superblocks un-updated than updated, and xfs_repair may 621 * pick them over the properly-updated primary. 622 */ 623 if (error) { 624 xfs_warn(mp, 625 "error %d reading secondary superblock for ag %d", 626 error, agno); 627 saved_error = error; 628 continue; 629 } 630 xfs_sb_to_disk(XFS_BUF_TO_SBP(bp), &mp->m_sb); 631 632 error = xfs_bwrite(bp); 633 xfs_buf_relse(bp); 634 if (error) { 635 xfs_warn(mp, 636 "write error %d updating secondary superblock for ag %d", 637 error, agno); 638 saved_error = error; 639 continue; 640 } 641 } 642 return saved_error ? saved_error : error; 643 644 error0: 645 xfs_trans_cancel(tp); 646 return error; 647 } 648 649 static int 650 xfs_growfs_log_private( 651 xfs_mount_t *mp, /* mount point for filesystem */ 652 xfs_growfs_log_t *in) /* growfs log input struct */ 653 { 654 xfs_extlen_t nb; 655 656 nb = in->newblocks; 657 if (nb < XFS_MIN_LOG_BLOCKS || nb < XFS_B_TO_FSB(mp, XFS_MIN_LOG_BYTES)) 658 return -EINVAL; 659 if (nb == mp->m_sb.sb_logblocks && 660 in->isint == (mp->m_sb.sb_logstart != 0)) 661 return -EINVAL; 662 /* 663 * Moving the log is hard, need new interfaces to sync 664 * the log first, hold off all activity while moving it. 665 * Can have shorter or longer log in the same space, 666 * or transform internal to external log or vice versa. 667 */ 668 return -ENOSYS; 669 } 670 671 /* 672 * protected versions of growfs function acquire and release locks on the mount 673 * point - exported through ioctls: XFS_IOC_FSGROWFSDATA, XFS_IOC_FSGROWFSLOG, 674 * XFS_IOC_FSGROWFSRT 675 */ 676 677 678 int 679 xfs_growfs_data( 680 xfs_mount_t *mp, 681 xfs_growfs_data_t *in) 682 { 683 int error; 684 685 if (!capable(CAP_SYS_ADMIN)) 686 return -EPERM; 687 if (!mutex_trylock(&mp->m_growlock)) 688 return -EWOULDBLOCK; 689 error = xfs_growfs_data_private(mp, in); 690 /* 691 * Increment the generation unconditionally, the error could be from 692 * updating the secondary superblocks, in which case the new size 693 * is live already. 694 */ 695 mp->m_generation++; 696 mutex_unlock(&mp->m_growlock); 697 return error; 698 } 699 700 int 701 xfs_growfs_log( 702 xfs_mount_t *mp, 703 xfs_growfs_log_t *in) 704 { 705 int error; 706 707 if (!capable(CAP_SYS_ADMIN)) 708 return -EPERM; 709 if (!mutex_trylock(&mp->m_growlock)) 710 return -EWOULDBLOCK; 711 error = xfs_growfs_log_private(mp, in); 712 mutex_unlock(&mp->m_growlock); 713 return error; 714 } 715 716 /* 717 * exported through ioctl XFS_IOC_FSCOUNTS 718 */ 719 720 int 721 xfs_fs_counts( 722 xfs_mount_t *mp, 723 xfs_fsop_counts_t *cnt) 724 { 725 cnt->allocino = percpu_counter_read_positive(&mp->m_icount); 726 cnt->freeino = percpu_counter_read_positive(&mp->m_ifree); 727 cnt->freedata = percpu_counter_read_positive(&mp->m_fdblocks) - 728 mp->m_alloc_set_aside; 729 730 spin_lock(&mp->m_sb_lock); 731 cnt->freertx = mp->m_sb.sb_frextents; 732 spin_unlock(&mp->m_sb_lock); 733 return 0; 734 } 735 736 /* 737 * exported through ioctl XFS_IOC_SET_RESBLKS & XFS_IOC_GET_RESBLKS 738 * 739 * xfs_reserve_blocks is called to set m_resblks 740 * in the in-core mount table. The number of unused reserved blocks 741 * is kept in m_resblks_avail. 742 * 743 * Reserve the requested number of blocks if available. Otherwise return 744 * as many as possible to satisfy the request. The actual number 745 * reserved are returned in outval 746 * 747 * A null inval pointer indicates that only the current reserved blocks 748 * available should be returned no settings are changed. 749 */ 750 751 int 752 xfs_reserve_blocks( 753 xfs_mount_t *mp, 754 __uint64_t *inval, 755 xfs_fsop_resblks_t *outval) 756 { 757 __int64_t lcounter, delta; 758 __int64_t fdblks_delta = 0; 759 __uint64_t request; 760 __int64_t free; 761 int error = 0; 762 763 /* If inval is null, report current values and return */ 764 if (inval == (__uint64_t *)NULL) { 765 if (!outval) 766 return -EINVAL; 767 outval->resblks = mp->m_resblks; 768 outval->resblks_avail = mp->m_resblks_avail; 769 return 0; 770 } 771 772 request = *inval; 773 774 /* 775 * With per-cpu counters, this becomes an interesting problem. we need 776 * to work out if we are freeing or allocation blocks first, then we can 777 * do the modification as necessary. 778 * 779 * We do this under the m_sb_lock so that if we are near ENOSPC, we will 780 * hold out any changes while we work out what to do. This means that 781 * the amount of free space can change while we do this, so we need to 782 * retry if we end up trying to reserve more space than is available. 783 */ 784 spin_lock(&mp->m_sb_lock); 785 786 /* 787 * If our previous reservation was larger than the current value, 788 * then move any unused blocks back to the free pool. Modify the resblks 789 * counters directly since we shouldn't have any problems unreserving 790 * space. 791 */ 792 if (mp->m_resblks > request) { 793 lcounter = mp->m_resblks_avail - request; 794 if (lcounter > 0) { /* release unused blocks */ 795 fdblks_delta = lcounter; 796 mp->m_resblks_avail -= lcounter; 797 } 798 mp->m_resblks = request; 799 if (fdblks_delta) { 800 spin_unlock(&mp->m_sb_lock); 801 error = xfs_mod_fdblocks(mp, fdblks_delta, 0); 802 spin_lock(&mp->m_sb_lock); 803 } 804 805 goto out; 806 } 807 808 /* 809 * If the request is larger than the current reservation, reserve the 810 * blocks before we update the reserve counters. Sample m_fdblocks and 811 * perform a partial reservation if the request exceeds free space. 812 */ 813 error = -ENOSPC; 814 do { 815 free = percpu_counter_sum(&mp->m_fdblocks) - 816 mp->m_alloc_set_aside; 817 if (!free) 818 break; 819 820 delta = request - mp->m_resblks; 821 lcounter = free - delta; 822 if (lcounter < 0) 823 /* We can't satisfy the request, just get what we can */ 824 fdblks_delta = free; 825 else 826 fdblks_delta = delta; 827 828 /* 829 * We'll either succeed in getting space from the free block 830 * count or we'll get an ENOSPC. If we get a ENOSPC, it means 831 * things changed while we were calculating fdblks_delta and so 832 * we should try again to see if there is anything left to 833 * reserve. 834 * 835 * Don't set the reserved flag here - we don't want to reserve 836 * the extra reserve blocks from the reserve..... 837 */ 838 spin_unlock(&mp->m_sb_lock); 839 error = xfs_mod_fdblocks(mp, -fdblks_delta, 0); 840 spin_lock(&mp->m_sb_lock); 841 } while (error == -ENOSPC); 842 843 /* 844 * Update the reserve counters if blocks have been successfully 845 * allocated. 846 */ 847 if (!error && fdblks_delta) { 848 mp->m_resblks += fdblks_delta; 849 mp->m_resblks_avail += fdblks_delta; 850 } 851 852 out: 853 if (outval) { 854 outval->resblks = mp->m_resblks; 855 outval->resblks_avail = mp->m_resblks_avail; 856 } 857 858 spin_unlock(&mp->m_sb_lock); 859 return error; 860 } 861 862 int 863 xfs_fs_goingdown( 864 xfs_mount_t *mp, 865 __uint32_t inflags) 866 { 867 switch (inflags) { 868 case XFS_FSOP_GOING_FLAGS_DEFAULT: { 869 struct super_block *sb = freeze_bdev(mp->m_super->s_bdev); 870 871 if (sb && !IS_ERR(sb)) { 872 xfs_force_shutdown(mp, SHUTDOWN_FORCE_UMOUNT); 873 thaw_bdev(sb->s_bdev, sb); 874 } 875 876 break; 877 } 878 case XFS_FSOP_GOING_FLAGS_LOGFLUSH: 879 xfs_force_shutdown(mp, SHUTDOWN_FORCE_UMOUNT); 880 break; 881 case XFS_FSOP_GOING_FLAGS_NOLOGFLUSH: 882 xfs_force_shutdown(mp, 883 SHUTDOWN_FORCE_UMOUNT | SHUTDOWN_LOG_IO_ERROR); 884 break; 885 default: 886 return -EINVAL; 887 } 888 889 return 0; 890 } 891 892 /* 893 * Force a shutdown of the filesystem instantly while keeping the filesystem 894 * consistent. We don't do an unmount here; just shutdown the shop, make sure 895 * that absolutely nothing persistent happens to this filesystem after this 896 * point. 897 */ 898 void 899 xfs_do_force_shutdown( 900 xfs_mount_t *mp, 901 int flags, 902 char *fname, 903 int lnnum) 904 { 905 int logerror; 906 907 logerror = flags & SHUTDOWN_LOG_IO_ERROR; 908 909 if (!(flags & SHUTDOWN_FORCE_UMOUNT)) { 910 xfs_notice(mp, 911 "%s(0x%x) called from line %d of file %s. Return address = 0x%p", 912 __func__, flags, lnnum, fname, __return_address); 913 } 914 /* 915 * No need to duplicate efforts. 916 */ 917 if (XFS_FORCED_SHUTDOWN(mp) && !logerror) 918 return; 919 920 /* 921 * This flags XFS_MOUNT_FS_SHUTDOWN, makes sure that we don't 922 * queue up anybody new on the log reservations, and wakes up 923 * everybody who's sleeping on log reservations to tell them 924 * the bad news. 925 */ 926 if (xfs_log_force_umount(mp, logerror)) 927 return; 928 929 if (flags & SHUTDOWN_CORRUPT_INCORE) { 930 xfs_alert_tag(mp, XFS_PTAG_SHUTDOWN_CORRUPT, 931 "Corruption of in-memory data detected. Shutting down filesystem"); 932 if (XFS_ERRLEVEL_HIGH <= xfs_error_level) 933 xfs_stack_trace(); 934 } else if (!(flags & SHUTDOWN_FORCE_UMOUNT)) { 935 if (logerror) { 936 xfs_alert_tag(mp, XFS_PTAG_SHUTDOWN_LOGERROR, 937 "Log I/O Error Detected. Shutting down filesystem"); 938 } else if (flags & SHUTDOWN_DEVICE_REQ) { 939 xfs_alert_tag(mp, XFS_PTAG_SHUTDOWN_IOERROR, 940 "All device paths lost. Shutting down filesystem"); 941 } else if (!(flags & SHUTDOWN_REMOTE_REQ)) { 942 xfs_alert_tag(mp, XFS_PTAG_SHUTDOWN_IOERROR, 943 "I/O Error Detected. Shutting down filesystem"); 944 } 945 } 946 if (!(flags & SHUTDOWN_FORCE_UMOUNT)) { 947 xfs_alert(mp, 948 "Please umount the filesystem and rectify the problem(s)"); 949 } 950 } 951