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_ag.h" 26 #include "xfs_mount.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_ialloc.h" 37 #include "xfs_fsops.h" 38 #include "xfs_itable.h" 39 #include "xfs_trans_space.h" 40 #include "xfs_rtalloc.h" 41 #include "xfs_trace.h" 42 #include "xfs_log.h" 43 #include "xfs_dinode.h" 44 #include "xfs_filestream.h" 45 46 /* 47 * File system operations 48 */ 49 50 int 51 xfs_fs_geometry( 52 xfs_mount_t *mp, 53 xfs_fsop_geom_t *geo, 54 int new_version) 55 { 56 57 memset(geo, 0, sizeof(*geo)); 58 59 geo->blocksize = mp->m_sb.sb_blocksize; 60 geo->rtextsize = mp->m_sb.sb_rextsize; 61 geo->agblocks = mp->m_sb.sb_agblocks; 62 geo->agcount = mp->m_sb.sb_agcount; 63 geo->logblocks = mp->m_sb.sb_logblocks; 64 geo->sectsize = mp->m_sb.sb_sectsize; 65 geo->inodesize = mp->m_sb.sb_inodesize; 66 geo->imaxpct = mp->m_sb.sb_imax_pct; 67 geo->datablocks = mp->m_sb.sb_dblocks; 68 geo->rtblocks = mp->m_sb.sb_rblocks; 69 geo->rtextents = mp->m_sb.sb_rextents; 70 geo->logstart = mp->m_sb.sb_logstart; 71 ASSERT(sizeof(geo->uuid)==sizeof(mp->m_sb.sb_uuid)); 72 memcpy(geo->uuid, &mp->m_sb.sb_uuid, sizeof(mp->m_sb.sb_uuid)); 73 if (new_version >= 2) { 74 geo->sunit = mp->m_sb.sb_unit; 75 geo->swidth = mp->m_sb.sb_width; 76 } 77 if (new_version >= 3) { 78 geo->version = XFS_FSOP_GEOM_VERSION; 79 geo->flags = XFS_FSOP_GEOM_FLAGS_NLINK | 80 XFS_FSOP_GEOM_FLAGS_DIRV2 | 81 (xfs_sb_version_hasattr(&mp->m_sb) ? 82 XFS_FSOP_GEOM_FLAGS_ATTR : 0) | 83 (xfs_sb_version_hasquota(&mp->m_sb) ? 84 XFS_FSOP_GEOM_FLAGS_QUOTA : 0) | 85 (xfs_sb_version_hasalign(&mp->m_sb) ? 86 XFS_FSOP_GEOM_FLAGS_IALIGN : 0) | 87 (xfs_sb_version_hasdalign(&mp->m_sb) ? 88 XFS_FSOP_GEOM_FLAGS_DALIGN : 0) | 89 (xfs_sb_version_hasextflgbit(&mp->m_sb) ? 90 XFS_FSOP_GEOM_FLAGS_EXTFLG : 0) | 91 (xfs_sb_version_hassector(&mp->m_sb) ? 92 XFS_FSOP_GEOM_FLAGS_SECTOR : 0) | 93 (xfs_sb_version_hasasciici(&mp->m_sb) ? 94 XFS_FSOP_GEOM_FLAGS_DIRV2CI : 0) | 95 (xfs_sb_version_haslazysbcount(&mp->m_sb) ? 96 XFS_FSOP_GEOM_FLAGS_LAZYSB : 0) | 97 (xfs_sb_version_hasattr2(&mp->m_sb) ? 98 XFS_FSOP_GEOM_FLAGS_ATTR2 : 0) | 99 (xfs_sb_version_hasprojid32bit(&mp->m_sb) ? 100 XFS_FSOP_GEOM_FLAGS_PROJID32 : 0) | 101 (xfs_sb_version_hascrc(&mp->m_sb) ? 102 XFS_FSOP_GEOM_FLAGS_V5SB : 0) | 103 (xfs_sb_version_hasftype(&mp->m_sb) ? 104 XFS_FSOP_GEOM_FLAGS_FTYPE : 0) | 105 (xfs_sb_version_hasfinobt(&mp->m_sb) ? 106 XFS_FSOP_GEOM_FLAGS_FINOBT : 0); 107 geo->logsectsize = xfs_sb_version_hassector(&mp->m_sb) ? 108 mp->m_sb.sb_logsectsize : BBSIZE; 109 geo->rtsectsize = mp->m_sb.sb_blocksize; 110 geo->dirblocksize = mp->m_dir_geo->blksize; 111 } 112 if (new_version >= 4) { 113 geo->flags |= 114 (xfs_sb_version_haslogv2(&mp->m_sb) ? 115 XFS_FSOP_GEOM_FLAGS_LOGV2 : 0); 116 geo->logsunit = mp->m_sb.sb_logsunit; 117 } 118 return 0; 119 } 120 121 static struct xfs_buf * 122 xfs_growfs_get_hdr_buf( 123 struct xfs_mount *mp, 124 xfs_daddr_t blkno, 125 size_t numblks, 126 int flags, 127 const struct xfs_buf_ops *ops) 128 { 129 struct xfs_buf *bp; 130 131 bp = xfs_buf_get_uncached(mp->m_ddev_targp, numblks, flags); 132 if (!bp) 133 return NULL; 134 135 xfs_buf_zero(bp, 0, BBTOB(bp->b_length)); 136 bp->b_bn = blkno; 137 bp->b_maps[0].bm_bn = blkno; 138 bp->b_ops = ops; 139 140 return bp; 141 } 142 143 static int 144 xfs_growfs_data_private( 145 xfs_mount_t *mp, /* mount point for filesystem */ 146 xfs_growfs_data_t *in) /* growfs data input struct */ 147 { 148 xfs_agf_t *agf; 149 struct xfs_agfl *agfl; 150 xfs_agi_t *agi; 151 xfs_agnumber_t agno; 152 xfs_extlen_t agsize; 153 xfs_extlen_t tmpsize; 154 xfs_alloc_rec_t *arec; 155 xfs_buf_t *bp; 156 int bucket; 157 int dpct; 158 int error, saved_error = 0; 159 xfs_agnumber_t nagcount; 160 xfs_agnumber_t nagimax = 0; 161 xfs_rfsblock_t nb, nb_mod; 162 xfs_rfsblock_t new; 163 xfs_rfsblock_t nfree; 164 xfs_agnumber_t oagcount; 165 int pct; 166 xfs_trans_t *tp; 167 168 nb = in->newblocks; 169 pct = in->imaxpct; 170 if (nb < mp->m_sb.sb_dblocks || pct < 0 || pct > 100) 171 return XFS_ERROR(EINVAL); 172 if ((error = xfs_sb_validate_fsb_count(&mp->m_sb, nb))) 173 return error; 174 dpct = pct - mp->m_sb.sb_imax_pct; 175 bp = xfs_buf_read_uncached(mp->m_ddev_targp, 176 XFS_FSB_TO_BB(mp, nb) - XFS_FSS_TO_BB(mp, 1), 177 XFS_FSS_TO_BB(mp, 1), 0, NULL); 178 if (!bp) 179 return EIO; 180 if (bp->b_error) { 181 error = bp->b_error; 182 xfs_buf_relse(bp); 183 return error; 184 } 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 XFS_ERROR(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 tp = xfs_trans_alloc(mp, XFS_TRANS_GROWFS); 207 tp->t_flags |= XFS_TRANS_RESERVE; 208 error = xfs_trans_reserve(tp, &M_RES(mp)->tr_growdata, 209 XFS_GROWFS_SPACE_RES(mp), 0); 210 if (error) { 211 xfs_trans_cancel(tp, 0); 212 return error; 213 } 214 215 /* 216 * Write new AG headers to disk. Non-transactional, but written 217 * synchronously so they are completed prior to the growfs transaction 218 * being logged. 219 */ 220 nfree = 0; 221 for (agno = nagcount - 1; agno >= oagcount; agno--, new -= agsize) { 222 __be32 *agfl_bno; 223 224 /* 225 * AG freespace header block 226 */ 227 bp = xfs_growfs_get_hdr_buf(mp, 228 XFS_AG_DADDR(mp, agno, XFS_AGF_DADDR(mp)), 229 XFS_FSS_TO_BB(mp, 1), 0, 230 &xfs_agf_buf_ops); 231 if (!bp) { 232 error = ENOMEM; 233 goto error0; 234 } 235 236 agf = XFS_BUF_TO_AGF(bp); 237 agf->agf_magicnum = cpu_to_be32(XFS_AGF_MAGIC); 238 agf->agf_versionnum = cpu_to_be32(XFS_AGF_VERSION); 239 agf->agf_seqno = cpu_to_be32(agno); 240 if (agno == nagcount - 1) 241 agsize = 242 nb - 243 (agno * (xfs_rfsblock_t)mp->m_sb.sb_agblocks); 244 else 245 agsize = mp->m_sb.sb_agblocks; 246 agf->agf_length = cpu_to_be32(agsize); 247 agf->agf_roots[XFS_BTNUM_BNOi] = cpu_to_be32(XFS_BNO_BLOCK(mp)); 248 agf->agf_roots[XFS_BTNUM_CNTi] = cpu_to_be32(XFS_CNT_BLOCK(mp)); 249 agf->agf_levels[XFS_BTNUM_BNOi] = cpu_to_be32(1); 250 agf->agf_levels[XFS_BTNUM_CNTi] = cpu_to_be32(1); 251 agf->agf_flfirst = 0; 252 agf->agf_fllast = cpu_to_be32(XFS_AGFL_SIZE(mp) - 1); 253 agf->agf_flcount = 0; 254 tmpsize = agsize - XFS_PREALLOC_BLOCKS(mp); 255 agf->agf_freeblks = cpu_to_be32(tmpsize); 256 agf->agf_longest = cpu_to_be32(tmpsize); 257 if (xfs_sb_version_hascrc(&mp->m_sb)) 258 uuid_copy(&agf->agf_uuid, &mp->m_sb.sb_uuid); 259 260 error = xfs_bwrite(bp); 261 xfs_buf_relse(bp); 262 if (error) 263 goto error0; 264 265 /* 266 * AG freelist header block 267 */ 268 bp = xfs_growfs_get_hdr_buf(mp, 269 XFS_AG_DADDR(mp, agno, XFS_AGFL_DADDR(mp)), 270 XFS_FSS_TO_BB(mp, 1), 0, 271 &xfs_agfl_buf_ops); 272 if (!bp) { 273 error = ENOMEM; 274 goto error0; 275 } 276 277 agfl = XFS_BUF_TO_AGFL(bp); 278 if (xfs_sb_version_hascrc(&mp->m_sb)) { 279 agfl->agfl_magicnum = cpu_to_be32(XFS_AGFL_MAGIC); 280 agfl->agfl_seqno = cpu_to_be32(agno); 281 uuid_copy(&agfl->agfl_uuid, &mp->m_sb.sb_uuid); 282 } 283 284 agfl_bno = XFS_BUF_TO_AGFL_BNO(mp, bp); 285 for (bucket = 0; bucket < XFS_AGFL_SIZE(mp); bucket++) 286 agfl_bno[bucket] = cpu_to_be32(NULLAGBLOCK); 287 288 error = xfs_bwrite(bp); 289 xfs_buf_relse(bp); 290 if (error) 291 goto error0; 292 293 /* 294 * AG inode header block 295 */ 296 bp = xfs_growfs_get_hdr_buf(mp, 297 XFS_AG_DADDR(mp, agno, XFS_AGI_DADDR(mp)), 298 XFS_FSS_TO_BB(mp, 1), 0, 299 &xfs_agi_buf_ops); 300 if (!bp) { 301 error = ENOMEM; 302 goto error0; 303 } 304 305 agi = XFS_BUF_TO_AGI(bp); 306 agi->agi_magicnum = cpu_to_be32(XFS_AGI_MAGIC); 307 agi->agi_versionnum = cpu_to_be32(XFS_AGI_VERSION); 308 agi->agi_seqno = cpu_to_be32(agno); 309 agi->agi_length = cpu_to_be32(agsize); 310 agi->agi_count = 0; 311 agi->agi_root = cpu_to_be32(XFS_IBT_BLOCK(mp)); 312 agi->agi_level = cpu_to_be32(1); 313 agi->agi_freecount = 0; 314 agi->agi_newino = cpu_to_be32(NULLAGINO); 315 agi->agi_dirino = cpu_to_be32(NULLAGINO); 316 if (xfs_sb_version_hascrc(&mp->m_sb)) 317 uuid_copy(&agi->agi_uuid, &mp->m_sb.sb_uuid); 318 if (xfs_sb_version_hasfinobt(&mp->m_sb)) { 319 agi->agi_free_root = cpu_to_be32(XFS_FIBT_BLOCK(mp)); 320 agi->agi_free_level = cpu_to_be32(1); 321 } 322 for (bucket = 0; bucket < XFS_AGI_UNLINKED_BUCKETS; bucket++) 323 agi->agi_unlinked[bucket] = cpu_to_be32(NULLAGINO); 324 325 error = xfs_bwrite(bp); 326 xfs_buf_relse(bp); 327 if (error) 328 goto error0; 329 330 /* 331 * BNO btree root block 332 */ 333 bp = xfs_growfs_get_hdr_buf(mp, 334 XFS_AGB_TO_DADDR(mp, agno, XFS_BNO_BLOCK(mp)), 335 BTOBB(mp->m_sb.sb_blocksize), 0, 336 &xfs_allocbt_buf_ops); 337 338 if (!bp) { 339 error = ENOMEM; 340 goto error0; 341 } 342 343 if (xfs_sb_version_hascrc(&mp->m_sb)) 344 xfs_btree_init_block(mp, bp, XFS_ABTB_CRC_MAGIC, 0, 1, 345 agno, XFS_BTREE_CRC_BLOCKS); 346 else 347 xfs_btree_init_block(mp, bp, XFS_ABTB_MAGIC, 0, 1, 348 agno, 0); 349 350 arec = XFS_ALLOC_REC_ADDR(mp, XFS_BUF_TO_BLOCK(bp), 1); 351 arec->ar_startblock = cpu_to_be32(XFS_PREALLOC_BLOCKS(mp)); 352 arec->ar_blockcount = cpu_to_be32( 353 agsize - be32_to_cpu(arec->ar_startblock)); 354 355 error = xfs_bwrite(bp); 356 xfs_buf_relse(bp); 357 if (error) 358 goto error0; 359 360 /* 361 * CNT btree root block 362 */ 363 bp = xfs_growfs_get_hdr_buf(mp, 364 XFS_AGB_TO_DADDR(mp, agno, XFS_CNT_BLOCK(mp)), 365 BTOBB(mp->m_sb.sb_blocksize), 0, 366 &xfs_allocbt_buf_ops); 367 if (!bp) { 368 error = ENOMEM; 369 goto error0; 370 } 371 372 if (xfs_sb_version_hascrc(&mp->m_sb)) 373 xfs_btree_init_block(mp, bp, XFS_ABTC_CRC_MAGIC, 0, 1, 374 agno, XFS_BTREE_CRC_BLOCKS); 375 else 376 xfs_btree_init_block(mp, bp, XFS_ABTC_MAGIC, 0, 1, 377 agno, 0); 378 379 arec = XFS_ALLOC_REC_ADDR(mp, XFS_BUF_TO_BLOCK(bp), 1); 380 arec->ar_startblock = cpu_to_be32(XFS_PREALLOC_BLOCKS(mp)); 381 arec->ar_blockcount = cpu_to_be32( 382 agsize - be32_to_cpu(arec->ar_startblock)); 383 nfree += be32_to_cpu(arec->ar_blockcount); 384 385 error = xfs_bwrite(bp); 386 xfs_buf_relse(bp); 387 if (error) 388 goto error0; 389 390 /* 391 * INO btree root block 392 */ 393 bp = xfs_growfs_get_hdr_buf(mp, 394 XFS_AGB_TO_DADDR(mp, agno, XFS_IBT_BLOCK(mp)), 395 BTOBB(mp->m_sb.sb_blocksize), 0, 396 &xfs_inobt_buf_ops); 397 if (!bp) { 398 error = ENOMEM; 399 goto error0; 400 } 401 402 if (xfs_sb_version_hascrc(&mp->m_sb)) 403 xfs_btree_init_block(mp, bp, XFS_IBT_CRC_MAGIC, 0, 0, 404 agno, XFS_BTREE_CRC_BLOCKS); 405 else 406 xfs_btree_init_block(mp, bp, XFS_IBT_MAGIC, 0, 0, 407 agno, 0); 408 409 error = xfs_bwrite(bp); 410 xfs_buf_relse(bp); 411 if (error) 412 goto error0; 413 414 /* 415 * FINO btree root block 416 */ 417 if (xfs_sb_version_hasfinobt(&mp->m_sb)) { 418 bp = xfs_growfs_get_hdr_buf(mp, 419 XFS_AGB_TO_DADDR(mp, agno, XFS_FIBT_BLOCK(mp)), 420 BTOBB(mp->m_sb.sb_blocksize), 0, 421 &xfs_inobt_buf_ops); 422 if (!bp) { 423 error = ENOMEM; 424 goto error0; 425 } 426 427 if (xfs_sb_version_hascrc(&mp->m_sb)) 428 xfs_btree_init_block(mp, bp, XFS_FIBT_CRC_MAGIC, 429 0, 0, agno, 430 XFS_BTREE_CRC_BLOCKS); 431 else 432 xfs_btree_init_block(mp, bp, XFS_FIBT_MAGIC, 0, 433 0, agno, 0); 434 435 error = xfs_bwrite(bp); 436 xfs_buf_relse(bp); 437 if (error) 438 goto error0; 439 } 440 441 } 442 xfs_trans_agblocks_delta(tp, nfree); 443 /* 444 * There are new blocks in the old last a.g. 445 */ 446 if (new) { 447 /* 448 * Change the agi length. 449 */ 450 error = xfs_ialloc_read_agi(mp, tp, agno, &bp); 451 if (error) { 452 goto error0; 453 } 454 ASSERT(bp); 455 agi = XFS_BUF_TO_AGI(bp); 456 be32_add_cpu(&agi->agi_length, new); 457 ASSERT(nagcount == oagcount || 458 be32_to_cpu(agi->agi_length) == mp->m_sb.sb_agblocks); 459 xfs_ialloc_log_agi(tp, bp, XFS_AGI_LENGTH); 460 /* 461 * Change agf length. 462 */ 463 error = xfs_alloc_read_agf(mp, tp, agno, 0, &bp); 464 if (error) { 465 goto error0; 466 } 467 ASSERT(bp); 468 agf = XFS_BUF_TO_AGF(bp); 469 be32_add_cpu(&agf->agf_length, new); 470 ASSERT(be32_to_cpu(agf->agf_length) == 471 be32_to_cpu(agi->agi_length)); 472 473 xfs_alloc_log_agf(tp, bp, XFS_AGF_LENGTH); 474 /* 475 * Free the new space. 476 */ 477 error = xfs_free_extent(tp, XFS_AGB_TO_FSB(mp, agno, 478 be32_to_cpu(agf->agf_length) - new), new); 479 if (error) { 480 goto error0; 481 } 482 } 483 484 /* 485 * Update changed superblock fields transactionally. These are not 486 * seen by the rest of the world until the transaction commit applies 487 * them atomically to the superblock. 488 */ 489 if (nagcount > oagcount) 490 xfs_trans_mod_sb(tp, XFS_TRANS_SB_AGCOUNT, nagcount - oagcount); 491 if (nb > mp->m_sb.sb_dblocks) 492 xfs_trans_mod_sb(tp, XFS_TRANS_SB_DBLOCKS, 493 nb - mp->m_sb.sb_dblocks); 494 if (nfree) 495 xfs_trans_mod_sb(tp, XFS_TRANS_SB_FDBLOCKS, nfree); 496 if (dpct) 497 xfs_trans_mod_sb(tp, XFS_TRANS_SB_IMAXPCT, dpct); 498 error = xfs_trans_commit(tp, 0); 499 if (error) 500 return error; 501 502 /* New allocation groups fully initialized, so update mount struct */ 503 if (nagimax) 504 mp->m_maxagi = nagimax; 505 if (mp->m_sb.sb_imax_pct) { 506 __uint64_t icount = mp->m_sb.sb_dblocks * mp->m_sb.sb_imax_pct; 507 do_div(icount, 100); 508 mp->m_maxicount = icount << mp->m_sb.sb_inopblog; 509 } else 510 mp->m_maxicount = 0; 511 xfs_set_low_space_thresholds(mp); 512 513 /* update secondary superblocks. */ 514 for (agno = 1; agno < nagcount; agno++) { 515 error = 0; 516 /* 517 * new secondary superblocks need to be zeroed, not read from 518 * disk as the contents of the new area we are growing into is 519 * completely unknown. 520 */ 521 if (agno < oagcount) { 522 error = xfs_trans_read_buf(mp, NULL, mp->m_ddev_targp, 523 XFS_AGB_TO_DADDR(mp, agno, XFS_SB_BLOCK(mp)), 524 XFS_FSS_TO_BB(mp, 1), 0, &bp, 525 &xfs_sb_buf_ops); 526 } else { 527 bp = xfs_trans_get_buf(NULL, mp->m_ddev_targp, 528 XFS_AGB_TO_DADDR(mp, agno, XFS_SB_BLOCK(mp)), 529 XFS_FSS_TO_BB(mp, 1), 0); 530 if (bp) { 531 bp->b_ops = &xfs_sb_buf_ops; 532 xfs_buf_zero(bp, 0, BBTOB(bp->b_length)); 533 } else 534 error = ENOMEM; 535 } 536 537 /* 538 * If we get an error reading or writing alternate superblocks, 539 * continue. xfs_repair chooses the "best" superblock based 540 * on most matches; if we break early, we'll leave more 541 * superblocks un-updated than updated, and xfs_repair may 542 * pick them over the properly-updated primary. 543 */ 544 if (error) { 545 xfs_warn(mp, 546 "error %d reading secondary superblock for ag %d", 547 error, agno); 548 saved_error = error; 549 continue; 550 } 551 xfs_sb_to_disk(XFS_BUF_TO_SBP(bp), &mp->m_sb, XFS_SB_ALL_BITS); 552 553 error = xfs_bwrite(bp); 554 xfs_buf_relse(bp); 555 if (error) { 556 xfs_warn(mp, 557 "write error %d updating secondary superblock for ag %d", 558 error, agno); 559 saved_error = error; 560 continue; 561 } 562 } 563 return saved_error ? saved_error : error; 564 565 error0: 566 xfs_trans_cancel(tp, XFS_TRANS_ABORT); 567 return error; 568 } 569 570 static int 571 xfs_growfs_log_private( 572 xfs_mount_t *mp, /* mount point for filesystem */ 573 xfs_growfs_log_t *in) /* growfs log input struct */ 574 { 575 xfs_extlen_t nb; 576 577 nb = in->newblocks; 578 if (nb < XFS_MIN_LOG_BLOCKS || nb < XFS_B_TO_FSB(mp, XFS_MIN_LOG_BYTES)) 579 return XFS_ERROR(EINVAL); 580 if (nb == mp->m_sb.sb_logblocks && 581 in->isint == (mp->m_sb.sb_logstart != 0)) 582 return XFS_ERROR(EINVAL); 583 /* 584 * Moving the log is hard, need new interfaces to sync 585 * the log first, hold off all activity while moving it. 586 * Can have shorter or longer log in the same space, 587 * or transform internal to external log or vice versa. 588 */ 589 return XFS_ERROR(ENOSYS); 590 } 591 592 /* 593 * protected versions of growfs function acquire and release locks on the mount 594 * point - exported through ioctls: XFS_IOC_FSGROWFSDATA, XFS_IOC_FSGROWFSLOG, 595 * XFS_IOC_FSGROWFSRT 596 */ 597 598 599 int 600 xfs_growfs_data( 601 xfs_mount_t *mp, 602 xfs_growfs_data_t *in) 603 { 604 int error; 605 606 if (!capable(CAP_SYS_ADMIN)) 607 return XFS_ERROR(EPERM); 608 if (!mutex_trylock(&mp->m_growlock)) 609 return XFS_ERROR(EWOULDBLOCK); 610 error = xfs_growfs_data_private(mp, in); 611 mutex_unlock(&mp->m_growlock); 612 return error; 613 } 614 615 int 616 xfs_growfs_log( 617 xfs_mount_t *mp, 618 xfs_growfs_log_t *in) 619 { 620 int error; 621 622 if (!capable(CAP_SYS_ADMIN)) 623 return XFS_ERROR(EPERM); 624 if (!mutex_trylock(&mp->m_growlock)) 625 return XFS_ERROR(EWOULDBLOCK); 626 error = xfs_growfs_log_private(mp, in); 627 mutex_unlock(&mp->m_growlock); 628 return error; 629 } 630 631 /* 632 * exported through ioctl XFS_IOC_FSCOUNTS 633 */ 634 635 int 636 xfs_fs_counts( 637 xfs_mount_t *mp, 638 xfs_fsop_counts_t *cnt) 639 { 640 xfs_icsb_sync_counters(mp, XFS_ICSB_LAZY_COUNT); 641 spin_lock(&mp->m_sb_lock); 642 cnt->freedata = mp->m_sb.sb_fdblocks - XFS_ALLOC_SET_ASIDE(mp); 643 cnt->freertx = mp->m_sb.sb_frextents; 644 cnt->freeino = mp->m_sb.sb_ifree; 645 cnt->allocino = mp->m_sb.sb_icount; 646 spin_unlock(&mp->m_sb_lock); 647 return 0; 648 } 649 650 /* 651 * exported through ioctl XFS_IOC_SET_RESBLKS & XFS_IOC_GET_RESBLKS 652 * 653 * xfs_reserve_blocks is called to set m_resblks 654 * in the in-core mount table. The number of unused reserved blocks 655 * is kept in m_resblks_avail. 656 * 657 * Reserve the requested number of blocks if available. Otherwise return 658 * as many as possible to satisfy the request. The actual number 659 * reserved are returned in outval 660 * 661 * A null inval pointer indicates that only the current reserved blocks 662 * available should be returned no settings are changed. 663 */ 664 665 int 666 xfs_reserve_blocks( 667 xfs_mount_t *mp, 668 __uint64_t *inval, 669 xfs_fsop_resblks_t *outval) 670 { 671 __int64_t lcounter, delta, fdblks_delta; 672 __uint64_t request; 673 674 /* If inval is null, report current values and return */ 675 if (inval == (__uint64_t *)NULL) { 676 if (!outval) 677 return EINVAL; 678 outval->resblks = mp->m_resblks; 679 outval->resblks_avail = mp->m_resblks_avail; 680 return 0; 681 } 682 683 request = *inval; 684 685 /* 686 * With per-cpu counters, this becomes an interesting 687 * problem. we needto work out if we are freeing or allocation 688 * blocks first, then we can do the modification as necessary. 689 * 690 * We do this under the m_sb_lock so that if we are near 691 * ENOSPC, we will hold out any changes while we work out 692 * what to do. This means that the amount of free space can 693 * change while we do this, so we need to retry if we end up 694 * trying to reserve more space than is available. 695 * 696 * We also use the xfs_mod_incore_sb() interface so that we 697 * don't have to care about whether per cpu counter are 698 * enabled, disabled or even compiled in.... 699 */ 700 retry: 701 spin_lock(&mp->m_sb_lock); 702 xfs_icsb_sync_counters_locked(mp, 0); 703 704 /* 705 * If our previous reservation was larger than the current value, 706 * then move any unused blocks back to the free pool. 707 */ 708 fdblks_delta = 0; 709 if (mp->m_resblks > request) { 710 lcounter = mp->m_resblks_avail - request; 711 if (lcounter > 0) { /* release unused blocks */ 712 fdblks_delta = lcounter; 713 mp->m_resblks_avail -= lcounter; 714 } 715 mp->m_resblks = request; 716 } else { 717 __int64_t free; 718 719 free = mp->m_sb.sb_fdblocks - XFS_ALLOC_SET_ASIDE(mp); 720 if (!free) 721 goto out; /* ENOSPC and fdblks_delta = 0 */ 722 723 delta = request - mp->m_resblks; 724 lcounter = free - delta; 725 if (lcounter < 0) { 726 /* We can't satisfy the request, just get what we can */ 727 mp->m_resblks += free; 728 mp->m_resblks_avail += free; 729 fdblks_delta = -free; 730 } else { 731 fdblks_delta = -delta; 732 mp->m_resblks = request; 733 mp->m_resblks_avail += delta; 734 } 735 } 736 out: 737 if (outval) { 738 outval->resblks = mp->m_resblks; 739 outval->resblks_avail = mp->m_resblks_avail; 740 } 741 spin_unlock(&mp->m_sb_lock); 742 743 if (fdblks_delta) { 744 /* 745 * If we are putting blocks back here, m_resblks_avail is 746 * already at its max so this will put it in the free pool. 747 * 748 * If we need space, we'll either succeed in getting it 749 * from the free block count or we'll get an enospc. If 750 * we get a ENOSPC, it means things changed while we were 751 * calculating fdblks_delta and so we should try again to 752 * see if there is anything left to reserve. 753 * 754 * Don't set the reserved flag here - we don't want to reserve 755 * the extra reserve blocks from the reserve..... 756 */ 757 int error; 758 error = xfs_icsb_modify_counters(mp, XFS_SBS_FDBLOCKS, 759 fdblks_delta, 0); 760 if (error == ENOSPC) 761 goto retry; 762 } 763 return 0; 764 } 765 766 /* 767 * Dump a transaction into the log that contains no real change. This is needed 768 * to be able to make the log dirty or stamp the current tail LSN into the log 769 * during the covering operation. 770 * 771 * We cannot use an inode here for this - that will push dirty state back up 772 * into the VFS and then periodic inode flushing will prevent log covering from 773 * making progress. Hence we log a field in the superblock instead and use a 774 * synchronous transaction to ensure the superblock is immediately unpinned 775 * and can be written back. 776 */ 777 int 778 xfs_fs_log_dummy( 779 xfs_mount_t *mp) 780 { 781 xfs_trans_t *tp; 782 int error; 783 784 tp = _xfs_trans_alloc(mp, XFS_TRANS_DUMMY1, KM_SLEEP); 785 error = xfs_trans_reserve(tp, &M_RES(mp)->tr_sb, 0, 0); 786 if (error) { 787 xfs_trans_cancel(tp, 0); 788 return error; 789 } 790 791 /* log the UUID because it is an unchanging field */ 792 xfs_mod_sb(tp, XFS_SB_UUID); 793 xfs_trans_set_sync(tp); 794 return xfs_trans_commit(tp, 0); 795 } 796 797 int 798 xfs_fs_goingdown( 799 xfs_mount_t *mp, 800 __uint32_t inflags) 801 { 802 switch (inflags) { 803 case XFS_FSOP_GOING_FLAGS_DEFAULT: { 804 struct super_block *sb = freeze_bdev(mp->m_super->s_bdev); 805 806 if (sb && !IS_ERR(sb)) { 807 xfs_force_shutdown(mp, SHUTDOWN_FORCE_UMOUNT); 808 thaw_bdev(sb->s_bdev, sb); 809 } 810 811 break; 812 } 813 case XFS_FSOP_GOING_FLAGS_LOGFLUSH: 814 xfs_force_shutdown(mp, SHUTDOWN_FORCE_UMOUNT); 815 break; 816 case XFS_FSOP_GOING_FLAGS_NOLOGFLUSH: 817 xfs_force_shutdown(mp, 818 SHUTDOWN_FORCE_UMOUNT | SHUTDOWN_LOG_IO_ERROR); 819 break; 820 default: 821 return XFS_ERROR(EINVAL); 822 } 823 824 return 0; 825 } 826 827 /* 828 * Force a shutdown of the filesystem instantly while keeping the filesystem 829 * consistent. We don't do an unmount here; just shutdown the shop, make sure 830 * that absolutely nothing persistent happens to this filesystem after this 831 * point. 832 */ 833 void 834 xfs_do_force_shutdown( 835 xfs_mount_t *mp, 836 int flags, 837 char *fname, 838 int lnnum) 839 { 840 int logerror; 841 842 logerror = flags & SHUTDOWN_LOG_IO_ERROR; 843 844 if (!(flags & SHUTDOWN_FORCE_UMOUNT)) { 845 xfs_notice(mp, 846 "%s(0x%x) called from line %d of file %s. Return address = 0x%p", 847 __func__, flags, lnnum, fname, __return_address); 848 } 849 /* 850 * No need to duplicate efforts. 851 */ 852 if (XFS_FORCED_SHUTDOWN(mp) && !logerror) 853 return; 854 855 /* 856 * This flags XFS_MOUNT_FS_SHUTDOWN, makes sure that we don't 857 * queue up anybody new on the log reservations, and wakes up 858 * everybody who's sleeping on log reservations to tell them 859 * the bad news. 860 */ 861 if (xfs_log_force_umount(mp, logerror)) 862 return; 863 864 if (flags & SHUTDOWN_CORRUPT_INCORE) { 865 xfs_alert_tag(mp, XFS_PTAG_SHUTDOWN_CORRUPT, 866 "Corruption of in-memory data detected. Shutting down filesystem"); 867 if (XFS_ERRLEVEL_HIGH <= xfs_error_level) 868 xfs_stack_trace(); 869 } else if (!(flags & SHUTDOWN_FORCE_UMOUNT)) { 870 if (logerror) { 871 xfs_alert_tag(mp, XFS_PTAG_SHUTDOWN_LOGERROR, 872 "Log I/O Error Detected. Shutting down filesystem"); 873 } else if (flags & SHUTDOWN_DEVICE_REQ) { 874 xfs_alert_tag(mp, XFS_PTAG_SHUTDOWN_IOERROR, 875 "All device paths lost. Shutting down filesystem"); 876 } else if (!(flags & SHUTDOWN_REMOTE_REQ)) { 877 xfs_alert_tag(mp, XFS_PTAG_SHUTDOWN_IOERROR, 878 "I/O Error Detected. Shutting down filesystem"); 879 } 880 } 881 if (!(flags & SHUTDOWN_FORCE_UMOUNT)) { 882 xfs_alert(mp, 883 "Please umount the filesystem and rectify the problem(s)"); 884 } 885 } 886