1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright (c) 2000-2005 Silicon Graphics, Inc. 4 * All Rights Reserved. 5 */ 6 #include "xfs.h" 7 #include "xfs_fs.h" 8 #include "xfs_shared.h" 9 #include "xfs_format.h" 10 #include "xfs_log_format.h" 11 #include "xfs_trans_resv.h" 12 #include "xfs_bit.h" 13 #include "xfs_sb.h" 14 #include "xfs_mount.h" 15 #include "xfs_ialloc.h" 16 #include "xfs_alloc.h" 17 #include "xfs_error.h" 18 #include "xfs_trans.h" 19 #include "xfs_buf_item.h" 20 #include "xfs_bmap_btree.h" 21 #include "xfs_alloc_btree.h" 22 #include "xfs_log.h" 23 #include "xfs_rmap_btree.h" 24 #include "xfs_refcount_btree.h" 25 #include "xfs_da_format.h" 26 #include "xfs_health.h" 27 #include "xfs_ag.h" 28 #include "xfs_rtbitmap.h" 29 #include "xfs_exchrange.h" 30 #include "xfs_rtgroup.h" 31 32 /* 33 * Physical superblock buffer manipulations. Shared with libxfs in userspace. 34 */ 35 36 /* 37 * Check that all the V4 feature bits that the V5 filesystem format requires are 38 * correctly set. 39 */ 40 static bool 41 xfs_sb_validate_v5_features( 42 struct xfs_sb *sbp) 43 { 44 /* We must not have any unknown V4 feature bits set */ 45 if (sbp->sb_versionnum & ~XFS_SB_VERSION_OKBITS) 46 return false; 47 48 /* 49 * The CRC bit is considered an invalid V4 flag, so we have to add it 50 * manually to the OKBITS mask. 51 */ 52 if (sbp->sb_features2 & ~(XFS_SB_VERSION2_OKBITS | 53 XFS_SB_VERSION2_CRCBIT)) 54 return false; 55 56 /* Now check all the required V4 feature flags are set. */ 57 58 #define V5_VERS_FLAGS (XFS_SB_VERSION_NLINKBIT | \ 59 XFS_SB_VERSION_ALIGNBIT | \ 60 XFS_SB_VERSION_LOGV2BIT | \ 61 XFS_SB_VERSION_EXTFLGBIT | \ 62 XFS_SB_VERSION_DIRV2BIT | \ 63 XFS_SB_VERSION_MOREBITSBIT) 64 65 #define V5_FEAT_FLAGS (XFS_SB_VERSION2_LAZYSBCOUNTBIT | \ 66 XFS_SB_VERSION2_ATTR2BIT | \ 67 XFS_SB_VERSION2_PROJID32BIT | \ 68 XFS_SB_VERSION2_CRCBIT) 69 70 if ((sbp->sb_versionnum & V5_VERS_FLAGS) != V5_VERS_FLAGS) 71 return false; 72 if ((sbp->sb_features2 & V5_FEAT_FLAGS) != V5_FEAT_FLAGS) 73 return false; 74 return true; 75 } 76 77 /* 78 * We current support XFS v5 formats with known features and v4 superblocks with 79 * at least V2 directories. 80 */ 81 bool 82 xfs_sb_good_version( 83 struct xfs_sb *sbp) 84 { 85 /* 86 * All v5 filesystems are supported, but we must check that all the 87 * required v4 feature flags are enabled correctly as the code checks 88 * those flags and not for v5 support. 89 */ 90 if (xfs_sb_is_v5(sbp)) 91 return xfs_sb_validate_v5_features(sbp); 92 93 /* versions prior to v4 are not supported */ 94 if (XFS_SB_VERSION_NUM(sbp) != XFS_SB_VERSION_4) 95 return false; 96 97 /* We must not have any unknown v4 feature bits set */ 98 if ((sbp->sb_versionnum & ~XFS_SB_VERSION_OKBITS) || 99 ((sbp->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT) && 100 (sbp->sb_features2 & ~XFS_SB_VERSION2_OKBITS))) 101 return false; 102 103 /* V4 filesystems need v2 directories and unwritten extents */ 104 if (!(sbp->sb_versionnum & XFS_SB_VERSION_DIRV2BIT)) 105 return false; 106 if (!(sbp->sb_versionnum & XFS_SB_VERSION_EXTFLGBIT)) 107 return false; 108 109 /* It's a supported v4 filesystem */ 110 return true; 111 } 112 113 uint64_t 114 xfs_sb_version_to_features( 115 struct xfs_sb *sbp) 116 { 117 uint64_t features = 0; 118 119 /* optional V4 features */ 120 if (sbp->sb_rblocks > 0) 121 features |= XFS_FEAT_REALTIME; 122 if (sbp->sb_versionnum & XFS_SB_VERSION_NLINKBIT) 123 features |= XFS_FEAT_NLINK; 124 if (sbp->sb_versionnum & XFS_SB_VERSION_ATTRBIT) 125 features |= XFS_FEAT_ATTR; 126 if (sbp->sb_versionnum & XFS_SB_VERSION_QUOTABIT) 127 features |= XFS_FEAT_QUOTA; 128 if (sbp->sb_versionnum & XFS_SB_VERSION_ALIGNBIT) 129 features |= XFS_FEAT_ALIGN; 130 if (sbp->sb_versionnum & XFS_SB_VERSION_LOGV2BIT) 131 features |= XFS_FEAT_LOGV2; 132 if (sbp->sb_versionnum & XFS_SB_VERSION_DALIGNBIT) 133 features |= XFS_FEAT_DALIGN; 134 if (sbp->sb_versionnum & XFS_SB_VERSION_EXTFLGBIT) 135 features |= XFS_FEAT_EXTFLG; 136 if (sbp->sb_versionnum & XFS_SB_VERSION_SECTORBIT) 137 features |= XFS_FEAT_SECTOR; 138 if (sbp->sb_versionnum & XFS_SB_VERSION_BORGBIT) 139 features |= XFS_FEAT_ASCIICI; 140 if (sbp->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT) { 141 if (sbp->sb_features2 & XFS_SB_VERSION2_LAZYSBCOUNTBIT) 142 features |= XFS_FEAT_LAZYSBCOUNT; 143 if (sbp->sb_features2 & XFS_SB_VERSION2_ATTR2BIT) 144 features |= XFS_FEAT_ATTR2; 145 if (sbp->sb_features2 & XFS_SB_VERSION2_PROJID32BIT) 146 features |= XFS_FEAT_PROJID32; 147 if (sbp->sb_features2 & XFS_SB_VERSION2_FTYPE) 148 features |= XFS_FEAT_FTYPE; 149 } 150 151 if (!xfs_sb_is_v5(sbp)) 152 return features; 153 154 /* Always on V5 features */ 155 features |= XFS_FEAT_ALIGN | XFS_FEAT_LOGV2 | XFS_FEAT_EXTFLG | 156 XFS_FEAT_LAZYSBCOUNT | XFS_FEAT_ATTR2 | XFS_FEAT_PROJID32 | 157 XFS_FEAT_V3INODES | XFS_FEAT_CRC | XFS_FEAT_PQUOTINO; 158 159 /* Optional V5 features */ 160 if (sbp->sb_features_ro_compat & XFS_SB_FEAT_RO_COMPAT_FINOBT) 161 features |= XFS_FEAT_FINOBT; 162 if (sbp->sb_features_ro_compat & XFS_SB_FEAT_RO_COMPAT_RMAPBT) 163 features |= XFS_FEAT_RMAPBT; 164 if (sbp->sb_features_ro_compat & XFS_SB_FEAT_RO_COMPAT_REFLINK) 165 features |= XFS_FEAT_REFLINK; 166 if (sbp->sb_features_ro_compat & XFS_SB_FEAT_RO_COMPAT_INOBTCNT) 167 features |= XFS_FEAT_INOBTCNT; 168 if (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_FTYPE) 169 features |= XFS_FEAT_FTYPE; 170 if (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_SPINODES) 171 features |= XFS_FEAT_SPINODES; 172 if (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_META_UUID) 173 features |= XFS_FEAT_META_UUID; 174 if (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_BIGTIME) 175 features |= XFS_FEAT_BIGTIME; 176 if (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_NEEDSREPAIR) 177 features |= XFS_FEAT_NEEDSREPAIR; 178 if (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_NREXT64) 179 features |= XFS_FEAT_NREXT64; 180 if (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_EXCHRANGE) 181 features |= XFS_FEAT_EXCHANGE_RANGE; 182 if (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_PARENT) 183 features |= XFS_FEAT_PARENT; 184 if (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_METADIR) 185 features |= XFS_FEAT_METADIR; 186 187 return features; 188 } 189 190 /* Check all the superblock fields we care about when reading one in. */ 191 STATIC int 192 xfs_validate_sb_read( 193 struct xfs_mount *mp, 194 struct xfs_sb *sbp) 195 { 196 if (!xfs_sb_is_v5(sbp)) 197 return 0; 198 199 /* 200 * Version 5 superblock feature mask validation. Reject combinations 201 * the kernel cannot support up front before checking anything else. 202 */ 203 if (xfs_sb_has_compat_feature(sbp, XFS_SB_FEAT_COMPAT_UNKNOWN)) { 204 xfs_warn(mp, 205 "Superblock has unknown compatible features (0x%x) enabled.", 206 (sbp->sb_features_compat & XFS_SB_FEAT_COMPAT_UNKNOWN)); 207 xfs_warn(mp, 208 "Using a more recent kernel is recommended."); 209 } 210 211 if (xfs_sb_has_ro_compat_feature(sbp, XFS_SB_FEAT_RO_COMPAT_UNKNOWN)) { 212 xfs_alert(mp, 213 "Superblock has unknown read-only compatible features (0x%x) enabled.", 214 (sbp->sb_features_ro_compat & 215 XFS_SB_FEAT_RO_COMPAT_UNKNOWN)); 216 if (!xfs_is_readonly(mp)) { 217 xfs_warn(mp, 218 "Attempted to mount read-only compatible filesystem read-write."); 219 xfs_warn(mp, 220 "Filesystem can only be safely mounted read only."); 221 222 return -EINVAL; 223 } 224 } 225 if (xfs_sb_has_incompat_feature(sbp, XFS_SB_FEAT_INCOMPAT_UNKNOWN)) { 226 xfs_warn(mp, 227 "Superblock has unknown incompatible features (0x%x) enabled.", 228 (sbp->sb_features_incompat & 229 XFS_SB_FEAT_INCOMPAT_UNKNOWN)); 230 xfs_warn(mp, 231 "Filesystem cannot be safely mounted by this kernel."); 232 return -EINVAL; 233 } 234 235 return 0; 236 } 237 238 /* Return the number of extents covered by a single rt bitmap file */ 239 static xfs_rtbxlen_t 240 xfs_extents_per_rbm( 241 struct xfs_sb *sbp) 242 { 243 if (xfs_sb_is_v5(sbp) && 244 (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_METADIR)) 245 return sbp->sb_rgextents; 246 return sbp->sb_rextents; 247 } 248 249 /* 250 * Return the payload size of a single rt bitmap block (without the metadata 251 * header if any). 252 */ 253 static inline unsigned int 254 xfs_rtbmblock_size( 255 struct xfs_sb *sbp) 256 { 257 if (xfs_sb_is_v5(sbp) && 258 (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_METADIR)) 259 return sbp->sb_blocksize - sizeof(struct xfs_rtbuf_blkinfo); 260 return sbp->sb_blocksize; 261 } 262 263 static uint64_t 264 xfs_expected_rbmblocks( 265 struct xfs_sb *sbp) 266 { 267 return howmany_64(xfs_extents_per_rbm(sbp), 268 NBBY * xfs_rtbmblock_size(sbp)); 269 } 270 271 /* Validate the realtime geometry */ 272 bool 273 xfs_validate_rt_geometry( 274 struct xfs_sb *sbp) 275 { 276 if (sbp->sb_rextsize * sbp->sb_blocksize > XFS_MAX_RTEXTSIZE || 277 sbp->sb_rextsize * sbp->sb_blocksize < XFS_MIN_RTEXTSIZE) 278 return false; 279 280 if (sbp->sb_rblocks == 0) { 281 if (sbp->sb_rextents != 0 || sbp->sb_rbmblocks != 0 || 282 sbp->sb_rextslog != 0 || sbp->sb_frextents != 0) 283 return false; 284 return true; 285 } 286 287 if (sbp->sb_rextents == 0 || 288 sbp->sb_rextents != div_u64(sbp->sb_rblocks, sbp->sb_rextsize) || 289 sbp->sb_rextslog != xfs_compute_rextslog(sbp->sb_rextents) || 290 sbp->sb_rbmblocks != xfs_expected_rbmblocks(sbp)) 291 return false; 292 293 return true; 294 } 295 296 /* Check all the superblock fields we care about when writing one out. */ 297 STATIC int 298 xfs_validate_sb_write( 299 struct xfs_mount *mp, 300 struct xfs_buf *bp, 301 struct xfs_sb *sbp) 302 { 303 /* 304 * Carry out additional sb summary counter sanity checks when we write 305 * the superblock. We skip this in the read validator because there 306 * could be newer superblocks in the log and if the values are garbage 307 * even after replay we'll recalculate them at the end of log mount. 308 * 309 * mkfs has traditionally written zeroed counters to inprogress and 310 * secondary superblocks, so allow this usage to continue because 311 * we never read counters from such superblocks. 312 */ 313 if (xfs_buf_daddr(bp) == XFS_SB_DADDR && !sbp->sb_inprogress && 314 (sbp->sb_fdblocks > sbp->sb_dblocks || 315 !xfs_verify_icount(mp, sbp->sb_icount) || 316 sbp->sb_ifree > sbp->sb_icount)) { 317 xfs_warn(mp, "SB summary counter sanity check failed"); 318 return -EFSCORRUPTED; 319 } 320 321 if (!xfs_sb_is_v5(sbp)) 322 return 0; 323 324 /* 325 * Version 5 superblock feature mask validation. Reject combinations 326 * the kernel cannot support since we checked for unsupported bits in 327 * the read verifier, which means that memory is corrupt. 328 */ 329 if (xfs_sb_has_compat_feature(sbp, XFS_SB_FEAT_COMPAT_UNKNOWN)) { 330 xfs_warn(mp, 331 "Corruption detected in superblock compatible features (0x%x)!", 332 (sbp->sb_features_compat & XFS_SB_FEAT_COMPAT_UNKNOWN)); 333 return -EFSCORRUPTED; 334 } 335 336 if (!xfs_is_readonly(mp) && 337 xfs_sb_has_ro_compat_feature(sbp, XFS_SB_FEAT_RO_COMPAT_UNKNOWN)) { 338 xfs_alert(mp, 339 "Corruption detected in superblock read-only compatible features (0x%x)!", 340 (sbp->sb_features_ro_compat & 341 XFS_SB_FEAT_RO_COMPAT_UNKNOWN)); 342 return -EFSCORRUPTED; 343 } 344 if (xfs_sb_has_incompat_feature(sbp, XFS_SB_FEAT_INCOMPAT_UNKNOWN)) { 345 xfs_warn(mp, 346 "Corruption detected in superblock incompatible features (0x%x)!", 347 (sbp->sb_features_incompat & 348 XFS_SB_FEAT_INCOMPAT_UNKNOWN)); 349 return -EFSCORRUPTED; 350 } 351 if (xfs_sb_has_incompat_log_feature(sbp, 352 XFS_SB_FEAT_INCOMPAT_LOG_UNKNOWN)) { 353 xfs_warn(mp, 354 "Corruption detected in superblock incompatible log features (0x%x)!", 355 (sbp->sb_features_log_incompat & 356 XFS_SB_FEAT_INCOMPAT_LOG_UNKNOWN)); 357 return -EFSCORRUPTED; 358 } 359 360 /* 361 * We can't read verify the sb LSN because the read verifier is called 362 * before the log is allocated and processed. We know the log is set up 363 * before write verifier calls, so check it here. 364 */ 365 if (!xfs_log_check_lsn(mp, sbp->sb_lsn)) 366 return -EFSCORRUPTED; 367 368 return 0; 369 } 370 371 int 372 xfs_compute_rgblklog( 373 xfs_rtxlen_t rgextents, 374 xfs_rgblock_t rextsize) 375 { 376 uint64_t rgblocks = (uint64_t)rgextents * rextsize; 377 378 return xfs_highbit64(rgblocks - 1) + 1; 379 } 380 381 static int 382 xfs_validate_sb_rtgroups( 383 struct xfs_mount *mp, 384 struct xfs_sb *sbp) 385 { 386 uint64_t groups; 387 int rgblklog; 388 389 if (sbp->sb_rextsize == 0) { 390 xfs_warn(mp, 391 "Realtime extent size must not be zero."); 392 return -EINVAL; 393 } 394 395 if (sbp->sb_rgextents > XFS_MAX_RGBLOCKS / sbp->sb_rextsize) { 396 xfs_warn(mp, 397 "Realtime group size (%u) must be less than %u rt extents.", 398 sbp->sb_rgextents, 399 XFS_MAX_RGBLOCKS / sbp->sb_rextsize); 400 return -EINVAL; 401 } 402 403 if (sbp->sb_rgextents < XFS_MIN_RGEXTENTS) { 404 xfs_warn(mp, 405 "Realtime group size (%u) must be at least %u rt extents.", 406 sbp->sb_rgextents, XFS_MIN_RGEXTENTS); 407 return -EINVAL; 408 } 409 410 if (sbp->sb_rgcount > XFS_MAX_RGNUMBER) { 411 xfs_warn(mp, 412 "Realtime groups (%u) must be less than %u.", 413 sbp->sb_rgcount, XFS_MAX_RGNUMBER); 414 return -EINVAL; 415 } 416 417 groups = howmany_64(sbp->sb_rextents, sbp->sb_rgextents); 418 if (groups != sbp->sb_rgcount) { 419 xfs_warn(mp, 420 "Realtime groups (%u) do not cover the entire rt section; need (%llu) groups.", 421 sbp->sb_rgcount, groups); 422 return -EINVAL; 423 } 424 425 /* Exchange-range is required for fsr to work on realtime files */ 426 if (!(sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_EXCHRANGE)) { 427 xfs_warn(mp, 428 "Realtime groups feature requires exchange-range support."); 429 return -EINVAL; 430 } 431 432 rgblklog = xfs_compute_rgblklog(sbp->sb_rgextents, sbp->sb_rextsize); 433 if (sbp->sb_rgblklog != rgblklog) { 434 xfs_warn(mp, 435 "Realtime group log (%d) does not match expected value (%d).", 436 sbp->sb_rgblklog, rgblklog); 437 return -EINVAL; 438 } 439 440 return 0; 441 } 442 443 /* Check the validity of the SB. */ 444 STATIC int 445 xfs_validate_sb_common( 446 struct xfs_mount *mp, 447 struct xfs_buf *bp, 448 struct xfs_sb *sbp) 449 { 450 struct xfs_dsb *dsb = bp->b_addr; 451 uint32_t agcount = 0; 452 uint32_t rem; 453 bool has_dalign; 454 int error; 455 456 if (!xfs_verify_magic(bp, dsb->sb_magicnum)) { 457 xfs_warn(mp, 458 "Superblock has bad magic number 0x%x. Not an XFS filesystem?", 459 be32_to_cpu(dsb->sb_magicnum)); 460 return -EWRONGFS; 461 } 462 463 if (!xfs_sb_good_version(sbp)) { 464 xfs_warn(mp, 465 "Superblock has unknown features enabled or corrupted feature masks."); 466 return -EWRONGFS; 467 } 468 469 /* 470 * Validate feature flags and state 471 */ 472 if (xfs_sb_is_v5(sbp)) { 473 if (sbp->sb_blocksize < XFS_MIN_CRC_BLOCKSIZE) { 474 xfs_notice(mp, 475 "Block size (%u bytes) too small for Version 5 superblock (minimum %d bytes)", 476 sbp->sb_blocksize, XFS_MIN_CRC_BLOCKSIZE); 477 return -EFSCORRUPTED; 478 } 479 480 /* V5 has a separate project quota inode */ 481 if (sbp->sb_qflags & (XFS_OQUOTA_ENFD | XFS_OQUOTA_CHKD)) { 482 xfs_notice(mp, 483 "Version 5 of Super block has XFS_OQUOTA bits."); 484 return -EFSCORRUPTED; 485 } 486 487 /* 488 * Full inode chunks must be aligned to inode chunk size when 489 * sparse inodes are enabled to support the sparse chunk 490 * allocation algorithm and prevent overlapping inode records. 491 */ 492 if (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_SPINODES) { 493 uint32_t align; 494 495 align = XFS_INODES_PER_CHUNK * sbp->sb_inodesize 496 >> sbp->sb_blocklog; 497 if (sbp->sb_inoalignmt != align) { 498 xfs_warn(mp, 499 "Inode block alignment (%u) must match chunk size (%u) for sparse inodes.", 500 sbp->sb_inoalignmt, align); 501 return -EINVAL; 502 } 503 504 if (!sbp->sb_spino_align || 505 sbp->sb_spino_align > sbp->sb_inoalignmt || 506 (sbp->sb_inoalignmt % sbp->sb_spino_align) != 0) { 507 xfs_warn(mp, 508 "Sparse inode alignment (%u) is invalid.", 509 sbp->sb_spino_align); 510 return -EINVAL; 511 } 512 } else if (sbp->sb_spino_align) { 513 xfs_warn(mp, 514 "Sparse inode alignment (%u) should be zero.", 515 sbp->sb_spino_align); 516 return -EINVAL; 517 } 518 519 if (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_METADIR) { 520 if (memchr_inv(sbp->sb_pad, 0, sizeof(sbp->sb_pad))) { 521 xfs_warn(mp, 522 "Metadir superblock padding fields must be zero."); 523 return -EINVAL; 524 } 525 526 error = xfs_validate_sb_rtgroups(mp, sbp); 527 if (error) 528 return error; 529 } 530 } else if (sbp->sb_qflags & (XFS_PQUOTA_ENFD | XFS_GQUOTA_ENFD | 531 XFS_PQUOTA_CHKD | XFS_GQUOTA_CHKD)) { 532 xfs_notice(mp, 533 "Superblock earlier than Version 5 has XFS_{P|G}QUOTA_{ENFD|CHKD} bits."); 534 return -EFSCORRUPTED; 535 } 536 537 if (unlikely( 538 sbp->sb_logstart == 0 && mp->m_logdev_targp == mp->m_ddev_targp)) { 539 xfs_warn(mp, 540 "filesystem is marked as having an external log; " 541 "specify logdev on the mount command line."); 542 return -EINVAL; 543 } 544 545 if (unlikely( 546 sbp->sb_logstart != 0 && mp->m_logdev_targp != mp->m_ddev_targp)) { 547 xfs_warn(mp, 548 "filesystem is marked as having an internal log; " 549 "do not specify logdev on the mount command line."); 550 return -EINVAL; 551 } 552 553 /* Compute agcount for this number of dblocks and agblocks */ 554 if (sbp->sb_agblocks) { 555 agcount = div_u64_rem(sbp->sb_dblocks, sbp->sb_agblocks, &rem); 556 if (rem) 557 agcount++; 558 } 559 560 /* 561 * More sanity checking. Most of these were stolen directly from 562 * xfs_repair. 563 */ 564 if (unlikely( 565 sbp->sb_agcount <= 0 || 566 sbp->sb_sectsize < XFS_MIN_SECTORSIZE || 567 sbp->sb_sectsize > XFS_MAX_SECTORSIZE || 568 sbp->sb_sectlog < XFS_MIN_SECTORSIZE_LOG || 569 sbp->sb_sectlog > XFS_MAX_SECTORSIZE_LOG || 570 sbp->sb_sectsize != (1 << sbp->sb_sectlog) || 571 sbp->sb_blocksize < XFS_MIN_BLOCKSIZE || 572 sbp->sb_blocksize > XFS_MAX_BLOCKSIZE || 573 sbp->sb_blocklog < XFS_MIN_BLOCKSIZE_LOG || 574 sbp->sb_blocklog > XFS_MAX_BLOCKSIZE_LOG || 575 sbp->sb_blocksize != (1 << sbp->sb_blocklog) || 576 sbp->sb_dirblklog + sbp->sb_blocklog > XFS_MAX_BLOCKSIZE_LOG || 577 sbp->sb_inodesize < XFS_DINODE_MIN_SIZE || 578 sbp->sb_inodesize > XFS_DINODE_MAX_SIZE || 579 sbp->sb_inodelog < XFS_DINODE_MIN_LOG || 580 sbp->sb_inodelog > XFS_DINODE_MAX_LOG || 581 sbp->sb_inodesize != (1 << sbp->sb_inodelog) || 582 sbp->sb_inopblock != howmany(sbp->sb_blocksize,sbp->sb_inodesize) || 583 XFS_FSB_TO_B(mp, sbp->sb_agblocks) < XFS_MIN_AG_BYTES || 584 XFS_FSB_TO_B(mp, sbp->sb_agblocks) > XFS_MAX_AG_BYTES || 585 sbp->sb_agblklog != xfs_highbit32(sbp->sb_agblocks - 1) + 1 || 586 agcount == 0 || agcount != sbp->sb_agcount || 587 (sbp->sb_blocklog - sbp->sb_inodelog != sbp->sb_inopblog) || 588 (sbp->sb_rextsize * sbp->sb_blocksize > XFS_MAX_RTEXTSIZE) || 589 (sbp->sb_rextsize * sbp->sb_blocksize < XFS_MIN_RTEXTSIZE) || 590 (sbp->sb_imax_pct > 100 /* zero sb_imax_pct is valid */) || 591 sbp->sb_dblocks == 0 || 592 sbp->sb_dblocks > XFS_MAX_DBLOCKS(sbp) || 593 sbp->sb_dblocks < XFS_MIN_DBLOCKS(sbp) || 594 sbp->sb_shared_vn != 0)) { 595 xfs_notice(mp, "SB sanity check failed"); 596 return -EFSCORRUPTED; 597 } 598 599 /* 600 * Logs that are too large are not supported at all. Reject them 601 * outright. Logs that are too small are tolerated on v4 filesystems, 602 * but we can only check that when mounting the log. Hence we skip 603 * those checks here. 604 */ 605 if (sbp->sb_logblocks > XFS_MAX_LOG_BLOCKS) { 606 xfs_notice(mp, 607 "Log size 0x%x blocks too large, maximum size is 0x%llx blocks", 608 sbp->sb_logblocks, XFS_MAX_LOG_BLOCKS); 609 return -EFSCORRUPTED; 610 } 611 612 if (XFS_FSB_TO_B(mp, sbp->sb_logblocks) > XFS_MAX_LOG_BYTES) { 613 xfs_warn(mp, 614 "log size 0x%llx bytes too large, maximum size is 0x%llx bytes", 615 XFS_FSB_TO_B(mp, sbp->sb_logblocks), 616 XFS_MAX_LOG_BYTES); 617 return -EFSCORRUPTED; 618 } 619 620 /* 621 * Do not allow filesystems with corrupted log sector or stripe units to 622 * be mounted. We cannot safely size the iclogs or write to the log if 623 * the log stripe unit is not valid. 624 */ 625 if (sbp->sb_versionnum & XFS_SB_VERSION_SECTORBIT) { 626 if (sbp->sb_logsectsize != (1U << sbp->sb_logsectlog)) { 627 xfs_notice(mp, 628 "log sector size in bytes/log2 (0x%x/0x%x) must match", 629 sbp->sb_logsectsize, 1U << sbp->sb_logsectlog); 630 return -EFSCORRUPTED; 631 } 632 } else if (sbp->sb_logsectsize || sbp->sb_logsectlog) { 633 xfs_notice(mp, 634 "log sector size in bytes/log2 (0x%x/0x%x) are not zero", 635 sbp->sb_logsectsize, sbp->sb_logsectlog); 636 return -EFSCORRUPTED; 637 } 638 639 if (sbp->sb_logsunit > 1) { 640 if (sbp->sb_logsunit % sbp->sb_blocksize) { 641 xfs_notice(mp, 642 "log stripe unit 0x%x bytes must be a multiple of block size", 643 sbp->sb_logsunit); 644 return -EFSCORRUPTED; 645 } 646 if (sbp->sb_logsunit > XLOG_MAX_RECORD_BSIZE) { 647 xfs_notice(mp, 648 "log stripe unit 0x%x bytes over maximum size (0x%x bytes)", 649 sbp->sb_logsunit, XLOG_MAX_RECORD_BSIZE); 650 return -EFSCORRUPTED; 651 } 652 } 653 654 if (!xfs_validate_rt_geometry(sbp)) { 655 xfs_notice(mp, 656 "realtime %sgeometry check failed", 657 sbp->sb_rblocks ? "" : "zeroed "); 658 return -EFSCORRUPTED; 659 } 660 661 /* 662 * Either (sb_unit and !hasdalign) or (!sb_unit and hasdalign) 663 * would imply the image is corrupted. 664 */ 665 has_dalign = sbp->sb_versionnum & XFS_SB_VERSION_DALIGNBIT; 666 if (!!sbp->sb_unit ^ has_dalign) { 667 xfs_notice(mp, "SB stripe alignment sanity check failed"); 668 return -EFSCORRUPTED; 669 } 670 671 if (!xfs_validate_stripe_geometry(mp, XFS_FSB_TO_B(mp, sbp->sb_unit), 672 XFS_FSB_TO_B(mp, sbp->sb_width), 0, 673 xfs_buf_daddr(bp) == XFS_SB_DADDR, false)) 674 return -EFSCORRUPTED; 675 676 /* 677 * Currently only very few inode sizes are supported. 678 */ 679 switch (sbp->sb_inodesize) { 680 case 256: 681 case 512: 682 case 1024: 683 case 2048: 684 break; 685 default: 686 xfs_warn(mp, "inode size of %d bytes not supported", 687 sbp->sb_inodesize); 688 return -ENOSYS; 689 } 690 691 return 0; 692 } 693 694 void 695 xfs_sb_quota_from_disk(struct xfs_sb *sbp) 696 { 697 if (xfs_sb_is_v5(sbp) && 698 (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_METADIR)) { 699 sbp->sb_uquotino = NULLFSINO; 700 sbp->sb_gquotino = NULLFSINO; 701 sbp->sb_pquotino = NULLFSINO; 702 return; 703 } 704 705 /* 706 * older mkfs doesn't initialize quota inodes to NULLFSINO. This 707 * leads to in-core values having two different values for a quota 708 * inode to be invalid: 0 and NULLFSINO. Change it to a single value 709 * NULLFSINO. 710 * 711 * Note that this change affect only the in-core values. These 712 * values are not written back to disk unless any quota information 713 * is written to the disk. Even in that case, sb_pquotino field is 714 * not written to disk unless the superblock supports pquotino. 715 */ 716 if (sbp->sb_uquotino == 0) 717 sbp->sb_uquotino = NULLFSINO; 718 if (sbp->sb_gquotino == 0) 719 sbp->sb_gquotino = NULLFSINO; 720 if (sbp->sb_pquotino == 0) 721 sbp->sb_pquotino = NULLFSINO; 722 723 /* 724 * We need to do these manipilations only if we are working 725 * with an older version of on-disk superblock. 726 */ 727 if (xfs_sb_is_v5(sbp)) 728 return; 729 730 if (sbp->sb_qflags & XFS_OQUOTA_ENFD) 731 sbp->sb_qflags |= (sbp->sb_qflags & XFS_PQUOTA_ACCT) ? 732 XFS_PQUOTA_ENFD : XFS_GQUOTA_ENFD; 733 if (sbp->sb_qflags & XFS_OQUOTA_CHKD) 734 sbp->sb_qflags |= (sbp->sb_qflags & XFS_PQUOTA_ACCT) ? 735 XFS_PQUOTA_CHKD : XFS_GQUOTA_CHKD; 736 sbp->sb_qflags &= ~(XFS_OQUOTA_ENFD | XFS_OQUOTA_CHKD); 737 738 if (sbp->sb_qflags & XFS_PQUOTA_ACCT && 739 sbp->sb_gquotino != NULLFSINO) { 740 /* 741 * In older version of superblock, on-disk superblock only 742 * has sb_gquotino, and in-core superblock has both sb_gquotino 743 * and sb_pquotino. But, only one of them is supported at any 744 * point of time. So, if PQUOTA is set in disk superblock, 745 * copy over sb_gquotino to sb_pquotino. The NULLFSINO test 746 * above is to make sure we don't do this twice and wipe them 747 * both out! 748 */ 749 sbp->sb_pquotino = sbp->sb_gquotino; 750 sbp->sb_gquotino = NULLFSINO; 751 } 752 } 753 754 static void 755 __xfs_sb_from_disk( 756 struct xfs_sb *to, 757 struct xfs_dsb *from, 758 bool convert_xquota) 759 { 760 to->sb_magicnum = be32_to_cpu(from->sb_magicnum); 761 to->sb_blocksize = be32_to_cpu(from->sb_blocksize); 762 to->sb_dblocks = be64_to_cpu(from->sb_dblocks); 763 to->sb_rblocks = be64_to_cpu(from->sb_rblocks); 764 to->sb_rextents = be64_to_cpu(from->sb_rextents); 765 memcpy(&to->sb_uuid, &from->sb_uuid, sizeof(to->sb_uuid)); 766 to->sb_logstart = be64_to_cpu(from->sb_logstart); 767 to->sb_rootino = be64_to_cpu(from->sb_rootino); 768 to->sb_rbmino = be64_to_cpu(from->sb_rbmino); 769 to->sb_rsumino = be64_to_cpu(from->sb_rsumino); 770 to->sb_rextsize = be32_to_cpu(from->sb_rextsize); 771 to->sb_agblocks = be32_to_cpu(from->sb_agblocks); 772 to->sb_agcount = be32_to_cpu(from->sb_agcount); 773 to->sb_rbmblocks = be32_to_cpu(from->sb_rbmblocks); 774 to->sb_logblocks = be32_to_cpu(from->sb_logblocks); 775 to->sb_versionnum = be16_to_cpu(from->sb_versionnum); 776 to->sb_sectsize = be16_to_cpu(from->sb_sectsize); 777 to->sb_inodesize = be16_to_cpu(from->sb_inodesize); 778 to->sb_inopblock = be16_to_cpu(from->sb_inopblock); 779 memcpy(&to->sb_fname, &from->sb_fname, sizeof(to->sb_fname)); 780 to->sb_blocklog = from->sb_blocklog; 781 to->sb_sectlog = from->sb_sectlog; 782 to->sb_inodelog = from->sb_inodelog; 783 to->sb_inopblog = from->sb_inopblog; 784 to->sb_agblklog = from->sb_agblklog; 785 to->sb_rextslog = from->sb_rextslog; 786 to->sb_inprogress = from->sb_inprogress; 787 to->sb_imax_pct = from->sb_imax_pct; 788 to->sb_icount = be64_to_cpu(from->sb_icount); 789 to->sb_ifree = be64_to_cpu(from->sb_ifree); 790 to->sb_fdblocks = be64_to_cpu(from->sb_fdblocks); 791 to->sb_frextents = be64_to_cpu(from->sb_frextents); 792 to->sb_uquotino = be64_to_cpu(from->sb_uquotino); 793 to->sb_gquotino = be64_to_cpu(from->sb_gquotino); 794 to->sb_qflags = be16_to_cpu(from->sb_qflags); 795 to->sb_flags = from->sb_flags; 796 to->sb_shared_vn = from->sb_shared_vn; 797 to->sb_inoalignmt = be32_to_cpu(from->sb_inoalignmt); 798 to->sb_unit = be32_to_cpu(from->sb_unit); 799 to->sb_width = be32_to_cpu(from->sb_width); 800 to->sb_dirblklog = from->sb_dirblklog; 801 to->sb_logsectlog = from->sb_logsectlog; 802 to->sb_logsectsize = be16_to_cpu(from->sb_logsectsize); 803 to->sb_logsunit = be32_to_cpu(from->sb_logsunit); 804 to->sb_features2 = be32_to_cpu(from->sb_features2); 805 to->sb_bad_features2 = be32_to_cpu(from->sb_bad_features2); 806 to->sb_features_compat = be32_to_cpu(from->sb_features_compat); 807 to->sb_features_ro_compat = be32_to_cpu(from->sb_features_ro_compat); 808 to->sb_features_incompat = be32_to_cpu(from->sb_features_incompat); 809 to->sb_features_log_incompat = 810 be32_to_cpu(from->sb_features_log_incompat); 811 /* crc is only used on disk, not in memory; just init to 0 here. */ 812 to->sb_crc = 0; 813 to->sb_spino_align = be32_to_cpu(from->sb_spino_align); 814 to->sb_pquotino = be64_to_cpu(from->sb_pquotino); 815 to->sb_lsn = be64_to_cpu(from->sb_lsn); 816 /* 817 * sb_meta_uuid is only on disk if it differs from sb_uuid and the 818 * feature flag is set; if not set we keep it only in memory. 819 */ 820 if (xfs_sb_is_v5(to) && 821 (to->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_META_UUID)) 822 uuid_copy(&to->sb_meta_uuid, &from->sb_meta_uuid); 823 else 824 uuid_copy(&to->sb_meta_uuid, &from->sb_uuid); 825 /* Convert on-disk flags to in-memory flags? */ 826 if (convert_xquota) 827 xfs_sb_quota_from_disk(to); 828 829 if (to->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_METADIR) { 830 to->sb_metadirino = be64_to_cpu(from->sb_metadirino); 831 to->sb_rgblklog = from->sb_rgblklog; 832 memcpy(to->sb_pad, from->sb_pad, sizeof(to->sb_pad)); 833 to->sb_rgcount = be32_to_cpu(from->sb_rgcount); 834 to->sb_rgextents = be32_to_cpu(from->sb_rgextents); 835 to->sb_rbmino = NULLFSINO; 836 to->sb_rsumino = NULLFSINO; 837 } else { 838 to->sb_metadirino = NULLFSINO; 839 to->sb_rgcount = 1; 840 to->sb_rgextents = 0; 841 } 842 } 843 844 void 845 xfs_sb_from_disk( 846 struct xfs_sb *to, 847 struct xfs_dsb *from) 848 { 849 __xfs_sb_from_disk(to, from, true); 850 } 851 852 static void 853 xfs_sb_quota_to_disk( 854 struct xfs_dsb *to, 855 struct xfs_sb *from) 856 { 857 uint16_t qflags = from->sb_qflags; 858 859 if (xfs_sb_is_v5(from) && 860 (from->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_METADIR)) { 861 to->sb_qflags = cpu_to_be16(from->sb_qflags); 862 to->sb_uquotino = cpu_to_be64(0); 863 to->sb_gquotino = cpu_to_be64(0); 864 to->sb_pquotino = cpu_to_be64(0); 865 return; 866 } 867 868 to->sb_uquotino = cpu_to_be64(from->sb_uquotino); 869 870 /* 871 * The in-memory superblock quota state matches the v5 on-disk format so 872 * just write them out and return 873 */ 874 if (xfs_sb_is_v5(from)) { 875 to->sb_qflags = cpu_to_be16(from->sb_qflags); 876 to->sb_gquotino = cpu_to_be64(from->sb_gquotino); 877 to->sb_pquotino = cpu_to_be64(from->sb_pquotino); 878 return; 879 } 880 881 /* 882 * For older superblocks (v4), the in-core version of sb_qflags do not 883 * have XFS_OQUOTA_* flags, whereas the on-disk version does. So, 884 * convert incore XFS_{PG}QUOTA_* flags to on-disk XFS_OQUOTA_* flags. 885 */ 886 qflags &= ~(XFS_PQUOTA_ENFD | XFS_PQUOTA_CHKD | 887 XFS_GQUOTA_ENFD | XFS_GQUOTA_CHKD); 888 889 if (from->sb_qflags & 890 (XFS_PQUOTA_ENFD | XFS_GQUOTA_ENFD)) 891 qflags |= XFS_OQUOTA_ENFD; 892 if (from->sb_qflags & 893 (XFS_PQUOTA_CHKD | XFS_GQUOTA_CHKD)) 894 qflags |= XFS_OQUOTA_CHKD; 895 to->sb_qflags = cpu_to_be16(qflags); 896 897 /* 898 * GQUOTINO and PQUOTINO cannot be used together in versions 899 * of superblock that do not have pquotino. from->sb_flags 900 * tells us which quota is active and should be copied to 901 * disk. If neither are active, we should NULL the inode. 902 * 903 * In all cases, the separate pquotino must remain 0 because it 904 * is beyond the "end" of the valid non-pquotino superblock. 905 */ 906 if (from->sb_qflags & XFS_GQUOTA_ACCT) 907 to->sb_gquotino = cpu_to_be64(from->sb_gquotino); 908 else if (from->sb_qflags & XFS_PQUOTA_ACCT) 909 to->sb_gquotino = cpu_to_be64(from->sb_pquotino); 910 else { 911 /* 912 * We can't rely on just the fields being logged to tell us 913 * that it is safe to write NULLFSINO - we should only do that 914 * if quotas are not actually enabled. Hence only write 915 * NULLFSINO if both in-core quota inodes are NULL. 916 */ 917 if (from->sb_gquotino == NULLFSINO && 918 from->sb_pquotino == NULLFSINO) 919 to->sb_gquotino = cpu_to_be64(NULLFSINO); 920 } 921 922 to->sb_pquotino = 0; 923 } 924 925 void 926 xfs_sb_to_disk( 927 struct xfs_dsb *to, 928 struct xfs_sb *from) 929 { 930 xfs_sb_quota_to_disk(to, from); 931 932 to->sb_magicnum = cpu_to_be32(from->sb_magicnum); 933 to->sb_blocksize = cpu_to_be32(from->sb_blocksize); 934 to->sb_dblocks = cpu_to_be64(from->sb_dblocks); 935 to->sb_rblocks = cpu_to_be64(from->sb_rblocks); 936 to->sb_rextents = cpu_to_be64(from->sb_rextents); 937 memcpy(&to->sb_uuid, &from->sb_uuid, sizeof(to->sb_uuid)); 938 to->sb_logstart = cpu_to_be64(from->sb_logstart); 939 to->sb_rootino = cpu_to_be64(from->sb_rootino); 940 to->sb_rbmino = cpu_to_be64(from->sb_rbmino); 941 to->sb_rsumino = cpu_to_be64(from->sb_rsumino); 942 to->sb_rextsize = cpu_to_be32(from->sb_rextsize); 943 to->sb_agblocks = cpu_to_be32(from->sb_agblocks); 944 to->sb_agcount = cpu_to_be32(from->sb_agcount); 945 to->sb_rbmblocks = cpu_to_be32(from->sb_rbmblocks); 946 to->sb_logblocks = cpu_to_be32(from->sb_logblocks); 947 to->sb_versionnum = cpu_to_be16(from->sb_versionnum); 948 to->sb_sectsize = cpu_to_be16(from->sb_sectsize); 949 to->sb_inodesize = cpu_to_be16(from->sb_inodesize); 950 to->sb_inopblock = cpu_to_be16(from->sb_inopblock); 951 memcpy(&to->sb_fname, &from->sb_fname, sizeof(to->sb_fname)); 952 to->sb_blocklog = from->sb_blocklog; 953 to->sb_sectlog = from->sb_sectlog; 954 to->sb_inodelog = from->sb_inodelog; 955 to->sb_inopblog = from->sb_inopblog; 956 to->sb_agblklog = from->sb_agblklog; 957 to->sb_rextslog = from->sb_rextslog; 958 to->sb_inprogress = from->sb_inprogress; 959 to->sb_imax_pct = from->sb_imax_pct; 960 to->sb_icount = cpu_to_be64(from->sb_icount); 961 to->sb_ifree = cpu_to_be64(from->sb_ifree); 962 to->sb_fdblocks = cpu_to_be64(from->sb_fdblocks); 963 to->sb_frextents = cpu_to_be64(from->sb_frextents); 964 965 to->sb_flags = from->sb_flags; 966 to->sb_shared_vn = from->sb_shared_vn; 967 to->sb_inoalignmt = cpu_to_be32(from->sb_inoalignmt); 968 to->sb_unit = cpu_to_be32(from->sb_unit); 969 to->sb_width = cpu_to_be32(from->sb_width); 970 to->sb_dirblklog = from->sb_dirblklog; 971 to->sb_logsectlog = from->sb_logsectlog; 972 to->sb_logsectsize = cpu_to_be16(from->sb_logsectsize); 973 to->sb_logsunit = cpu_to_be32(from->sb_logsunit); 974 975 /* 976 * We need to ensure that bad_features2 always matches features2. 977 * Hence we enforce that here rather than having to remember to do it 978 * everywhere else that updates features2. 979 */ 980 from->sb_bad_features2 = from->sb_features2; 981 to->sb_features2 = cpu_to_be32(from->sb_features2); 982 to->sb_bad_features2 = cpu_to_be32(from->sb_bad_features2); 983 984 if (!xfs_sb_is_v5(from)) 985 return; 986 987 to->sb_features_compat = cpu_to_be32(from->sb_features_compat); 988 to->sb_features_ro_compat = 989 cpu_to_be32(from->sb_features_ro_compat); 990 to->sb_features_incompat = 991 cpu_to_be32(from->sb_features_incompat); 992 to->sb_features_log_incompat = 993 cpu_to_be32(from->sb_features_log_incompat); 994 to->sb_spino_align = cpu_to_be32(from->sb_spino_align); 995 to->sb_lsn = cpu_to_be64(from->sb_lsn); 996 if (from->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_META_UUID) 997 uuid_copy(&to->sb_meta_uuid, &from->sb_meta_uuid); 998 999 if (from->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_METADIR) { 1000 to->sb_metadirino = cpu_to_be64(from->sb_metadirino); 1001 to->sb_rgblklog = from->sb_rgblklog; 1002 memset(to->sb_pad, 0, sizeof(to->sb_pad)); 1003 to->sb_rgcount = cpu_to_be32(from->sb_rgcount); 1004 to->sb_rgextents = cpu_to_be32(from->sb_rgextents); 1005 to->sb_rbmino = cpu_to_be64(0); 1006 to->sb_rsumino = cpu_to_be64(0); 1007 } 1008 } 1009 1010 /* 1011 * If the superblock has the CRC feature bit set or the CRC field is non-null, 1012 * check that the CRC is valid. We check the CRC field is non-null because a 1013 * single bit error could clear the feature bit and unused parts of the 1014 * superblock are supposed to be zero. Hence a non-null crc field indicates that 1015 * we've potentially lost a feature bit and we should check it anyway. 1016 * 1017 * However, past bugs (i.e. in growfs) left non-zeroed regions beyond the 1018 * last field in V4 secondary superblocks. So for secondary superblocks, 1019 * we are more forgiving, and ignore CRC failures if the primary doesn't 1020 * indicate that the fs version is V5. 1021 */ 1022 static void 1023 xfs_sb_read_verify( 1024 struct xfs_buf *bp) 1025 { 1026 struct xfs_sb sb; 1027 struct xfs_mount *mp = bp->b_mount; 1028 struct xfs_dsb *dsb = bp->b_addr; 1029 int error; 1030 1031 /* 1032 * open code the version check to avoid needing to convert the entire 1033 * superblock from disk order just to check the version number 1034 */ 1035 if (dsb->sb_magicnum == cpu_to_be32(XFS_SB_MAGIC) && 1036 (((be16_to_cpu(dsb->sb_versionnum) & XFS_SB_VERSION_NUMBITS) == 1037 XFS_SB_VERSION_5) || 1038 dsb->sb_crc != 0)) { 1039 1040 if (!xfs_buf_verify_cksum(bp, XFS_SB_CRC_OFF)) { 1041 /* Only fail bad secondaries on a known V5 filesystem */ 1042 if (xfs_buf_daddr(bp) == XFS_SB_DADDR || 1043 xfs_has_crc(mp)) { 1044 error = -EFSBADCRC; 1045 goto out_error; 1046 } 1047 } 1048 } 1049 1050 /* 1051 * Check all the superblock fields. Don't byteswap the xquota flags 1052 * because _verify_common checks the on-disk values. 1053 */ 1054 __xfs_sb_from_disk(&sb, dsb, false); 1055 error = xfs_validate_sb_common(mp, bp, &sb); 1056 if (error) 1057 goto out_error; 1058 error = xfs_validate_sb_read(mp, &sb); 1059 1060 out_error: 1061 if (error == -EFSCORRUPTED || error == -EFSBADCRC) 1062 xfs_verifier_error(bp, error, __this_address); 1063 else if (error) 1064 xfs_buf_ioerror(bp, error); 1065 } 1066 1067 /* 1068 * We may be probed for a filesystem match, so we may not want to emit 1069 * messages when the superblock buffer is not actually an XFS superblock. 1070 * If we find an XFS superblock, then run a normal, noisy mount because we are 1071 * really going to mount it and want to know about errors. 1072 */ 1073 static void 1074 xfs_sb_quiet_read_verify( 1075 struct xfs_buf *bp) 1076 { 1077 struct xfs_dsb *dsb = bp->b_addr; 1078 1079 if (dsb->sb_magicnum == cpu_to_be32(XFS_SB_MAGIC)) { 1080 /* XFS filesystem, verify noisily! */ 1081 xfs_sb_read_verify(bp); 1082 return; 1083 } 1084 /* quietly fail */ 1085 xfs_buf_ioerror(bp, -EWRONGFS); 1086 } 1087 1088 static void 1089 xfs_sb_write_verify( 1090 struct xfs_buf *bp) 1091 { 1092 struct xfs_sb sb; 1093 struct xfs_mount *mp = bp->b_mount; 1094 struct xfs_buf_log_item *bip = bp->b_log_item; 1095 struct xfs_dsb *dsb = bp->b_addr; 1096 int error; 1097 1098 /* 1099 * Check all the superblock fields. Don't byteswap the xquota flags 1100 * because _verify_common checks the on-disk values. 1101 */ 1102 __xfs_sb_from_disk(&sb, dsb, false); 1103 error = xfs_validate_sb_common(mp, bp, &sb); 1104 if (error) 1105 goto out_error; 1106 error = xfs_validate_sb_write(mp, bp, &sb); 1107 if (error) 1108 goto out_error; 1109 1110 if (!xfs_sb_is_v5(&sb)) 1111 return; 1112 1113 if (bip) 1114 dsb->sb_lsn = cpu_to_be64(bip->bli_item.li_lsn); 1115 1116 xfs_buf_update_cksum(bp, XFS_SB_CRC_OFF); 1117 return; 1118 1119 out_error: 1120 xfs_verifier_error(bp, error, __this_address); 1121 } 1122 1123 const struct xfs_buf_ops xfs_sb_buf_ops = { 1124 .name = "xfs_sb", 1125 .magic = { cpu_to_be32(XFS_SB_MAGIC), cpu_to_be32(XFS_SB_MAGIC) }, 1126 .verify_read = xfs_sb_read_verify, 1127 .verify_write = xfs_sb_write_verify, 1128 }; 1129 1130 const struct xfs_buf_ops xfs_sb_quiet_buf_ops = { 1131 .name = "xfs_sb_quiet", 1132 .magic = { cpu_to_be32(XFS_SB_MAGIC), cpu_to_be32(XFS_SB_MAGIC) }, 1133 .verify_read = xfs_sb_quiet_read_verify, 1134 .verify_write = xfs_sb_write_verify, 1135 }; 1136 1137 /* Compute cached rt geometry from the incore sb. */ 1138 void 1139 xfs_sb_mount_rextsize( 1140 struct xfs_mount *mp, 1141 struct xfs_sb *sbp) 1142 { 1143 struct xfs_groups *rgs = &mp->m_groups[XG_TYPE_RTG]; 1144 1145 mp->m_rtxblklog = log2_if_power2(sbp->sb_rextsize); 1146 mp->m_rtxblkmask = mask64_if_power2(sbp->sb_rextsize); 1147 1148 if (xfs_sb_is_v5(sbp) && 1149 (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_METADIR)) { 1150 rgs->blocks = sbp->sb_rgextents * sbp->sb_rextsize; 1151 rgs->blklog = mp->m_sb.sb_rgblklog; 1152 rgs->blkmask = xfs_mask32lo(mp->m_sb.sb_rgblklog); 1153 } else { 1154 rgs->blocks = 0; 1155 rgs->blklog = 0; 1156 rgs->blkmask = (uint64_t)-1; 1157 } 1158 } 1159 1160 /* Update incore sb rt extent size, then recompute the cached rt geometry. */ 1161 void 1162 xfs_mount_sb_set_rextsize( 1163 struct xfs_mount *mp, 1164 struct xfs_sb *sbp, 1165 xfs_agblock_t rextsize) 1166 { 1167 sbp->sb_rextsize = rextsize; 1168 if (xfs_sb_is_v5(sbp) && 1169 (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_METADIR)) 1170 sbp->sb_rgblklog = xfs_compute_rgblklog(sbp->sb_rgextents, 1171 rextsize); 1172 1173 xfs_sb_mount_rextsize(mp, sbp); 1174 } 1175 1176 /* 1177 * xfs_mount_common 1178 * 1179 * Mount initialization code establishing various mount 1180 * fields from the superblock associated with the given 1181 * mount structure. 1182 * 1183 * Inode geometry are calculated in xfs_ialloc_setup_geometry. 1184 */ 1185 void 1186 xfs_sb_mount_common( 1187 struct xfs_mount *mp, 1188 struct xfs_sb *sbp) 1189 { 1190 struct xfs_groups *ags = &mp->m_groups[XG_TYPE_AG]; 1191 1192 mp->m_agfrotor = 0; 1193 atomic_set(&mp->m_agirotor, 0); 1194 mp->m_maxagi = mp->m_sb.sb_agcount; 1195 mp->m_blkbit_log = sbp->sb_blocklog + XFS_NBBYLOG; 1196 mp->m_blkbb_log = sbp->sb_blocklog - BBSHIFT; 1197 mp->m_sectbb_log = sbp->sb_sectlog - BBSHIFT; 1198 mp->m_agno_log = xfs_highbit32(sbp->sb_agcount - 1) + 1; 1199 mp->m_blockmask = sbp->sb_blocksize - 1; 1200 mp->m_blockwsize = xfs_rtbmblock_size(sbp) >> XFS_WORDLOG; 1201 mp->m_rtx_per_rbmblock = mp->m_blockwsize << XFS_NBWORDLOG; 1202 1203 ags->blocks = mp->m_sb.sb_agblocks; 1204 ags->blklog = mp->m_sb.sb_agblklog; 1205 ags->blkmask = xfs_mask32lo(mp->m_sb.sb_agblklog); 1206 1207 xfs_sb_mount_rextsize(mp, sbp); 1208 1209 mp->m_alloc_mxr[0] = xfs_allocbt_maxrecs(mp, sbp->sb_blocksize, true); 1210 mp->m_alloc_mxr[1] = xfs_allocbt_maxrecs(mp, sbp->sb_blocksize, false); 1211 mp->m_alloc_mnr[0] = mp->m_alloc_mxr[0] / 2; 1212 mp->m_alloc_mnr[1] = mp->m_alloc_mxr[1] / 2; 1213 1214 mp->m_bmap_dmxr[0] = xfs_bmbt_maxrecs(mp, sbp->sb_blocksize, true); 1215 mp->m_bmap_dmxr[1] = xfs_bmbt_maxrecs(mp, sbp->sb_blocksize, false); 1216 mp->m_bmap_dmnr[0] = mp->m_bmap_dmxr[0] / 2; 1217 mp->m_bmap_dmnr[1] = mp->m_bmap_dmxr[1] / 2; 1218 1219 mp->m_rmap_mxr[0] = xfs_rmapbt_maxrecs(mp, sbp->sb_blocksize, true); 1220 mp->m_rmap_mxr[1] = xfs_rmapbt_maxrecs(mp, sbp->sb_blocksize, false); 1221 mp->m_rmap_mnr[0] = mp->m_rmap_mxr[0] / 2; 1222 mp->m_rmap_mnr[1] = mp->m_rmap_mxr[1] / 2; 1223 1224 mp->m_refc_mxr[0] = xfs_refcountbt_maxrecs(mp, sbp->sb_blocksize, true); 1225 mp->m_refc_mxr[1] = xfs_refcountbt_maxrecs(mp, sbp->sb_blocksize, false); 1226 mp->m_refc_mnr[0] = mp->m_refc_mxr[0] / 2; 1227 mp->m_refc_mnr[1] = mp->m_refc_mxr[1] / 2; 1228 1229 mp->m_bsize = XFS_FSB_TO_BB(mp, 1); 1230 mp->m_alloc_set_aside = xfs_alloc_set_aside(mp); 1231 mp->m_ag_max_usable = xfs_alloc_ag_max_usable(mp); 1232 } 1233 1234 /* 1235 * xfs_log_sb() can be used to copy arbitrary changes to the in-core superblock 1236 * into the superblock buffer to be logged. It does not provide the higher 1237 * level of locking that is needed to protect the in-core superblock from 1238 * concurrent access. 1239 */ 1240 void 1241 xfs_log_sb( 1242 struct xfs_trans *tp) 1243 { 1244 struct xfs_mount *mp = tp->t_mountp; 1245 struct xfs_buf *bp = xfs_trans_getsb(tp); 1246 1247 /* 1248 * Lazy sb counters don't update the in-core superblock so do that now. 1249 * If this is at unmount, the counters will be exactly correct, but at 1250 * any other time they will only be ballpark correct because of 1251 * reservations that have been taken out percpu counters. If we have an 1252 * unclean shutdown, this will be corrected by log recovery rebuilding 1253 * the counters from the AGF block counts. 1254 */ 1255 if (xfs_has_lazysbcount(mp)) { 1256 mp->m_sb.sb_icount = percpu_counter_sum_positive(&mp->m_icount); 1257 mp->m_sb.sb_ifree = min_t(uint64_t, 1258 percpu_counter_sum_positive(&mp->m_ifree), 1259 mp->m_sb.sb_icount); 1260 mp->m_sb.sb_fdblocks = 1261 percpu_counter_sum_positive(&mp->m_fdblocks); 1262 } 1263 1264 /* 1265 * sb_frextents was added to the lazy sb counters when the rt groups 1266 * feature was introduced. This counter can go negative due to the way 1267 * we handle nearly-lockless reservations, so we must use the _positive 1268 * variant here to avoid writing out nonsense frextents. 1269 */ 1270 if (xfs_has_rtgroups(mp)) 1271 mp->m_sb.sb_frextents = 1272 percpu_counter_sum_positive(&mp->m_frextents); 1273 1274 xfs_sb_to_disk(bp->b_addr, &mp->m_sb); 1275 xfs_trans_buf_set_type(tp, bp, XFS_BLFT_SB_BUF); 1276 xfs_trans_log_buf(tp, bp, 0, sizeof(struct xfs_dsb) - 1); 1277 } 1278 1279 /* 1280 * xfs_sync_sb 1281 * 1282 * Sync the superblock to disk. 1283 * 1284 * Note that the caller is responsible for checking the frozen state of the 1285 * filesystem. This procedure uses the non-blocking transaction allocator and 1286 * thus will allow modifications to a frozen fs. This is required because this 1287 * code can be called during the process of freezing where use of the high-level 1288 * allocator would deadlock. 1289 */ 1290 int 1291 xfs_sync_sb( 1292 struct xfs_mount *mp, 1293 bool wait) 1294 { 1295 struct xfs_trans *tp; 1296 int error; 1297 1298 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_sb, 0, 0, 1299 XFS_TRANS_NO_WRITECOUNT, &tp); 1300 if (error) 1301 return error; 1302 1303 xfs_log_sb(tp); 1304 if (wait) 1305 xfs_trans_set_sync(tp); 1306 return xfs_trans_commit(tp); 1307 } 1308 1309 /* 1310 * Update all the secondary superblocks to match the new state of the primary. 1311 * Because we are completely overwriting all the existing fields in the 1312 * secondary superblock buffers, there is no need to read them in from disk. 1313 * Just get a new buffer, stamp it and write it. 1314 * 1315 * The sb buffers need to be cached here so that we serialise against other 1316 * operations that access the secondary superblocks, but we don't want to keep 1317 * them in memory once it is written so we mark it as a one-shot buffer. 1318 */ 1319 int 1320 xfs_update_secondary_sbs( 1321 struct xfs_mount *mp) 1322 { 1323 struct xfs_perag *pag = NULL; 1324 int saved_error = 0; 1325 int error = 0; 1326 LIST_HEAD (buffer_list); 1327 1328 /* update secondary superblocks. */ 1329 while ((pag = xfs_perag_next_from(mp, pag, 1))) { 1330 struct xfs_buf *bp; 1331 1332 error = xfs_buf_get(mp->m_ddev_targp, 1333 XFS_AG_DADDR(mp, pag_agno(pag), XFS_SB_DADDR), 1334 XFS_FSS_TO_BB(mp, 1), &bp); 1335 /* 1336 * If we get an error reading or writing alternate superblocks, 1337 * continue. xfs_repair chooses the "best" superblock based 1338 * on most matches; if we break early, we'll leave more 1339 * superblocks un-updated than updated, and xfs_repair may 1340 * pick them over the properly-updated primary. 1341 */ 1342 if (error) { 1343 xfs_warn(mp, 1344 "error allocating secondary superblock for ag %d", 1345 pag_agno(pag)); 1346 if (!saved_error) 1347 saved_error = error; 1348 continue; 1349 } 1350 1351 bp->b_ops = &xfs_sb_buf_ops; 1352 xfs_buf_oneshot(bp); 1353 xfs_buf_zero(bp, 0, BBTOB(bp->b_length)); 1354 xfs_sb_to_disk(bp->b_addr, &mp->m_sb); 1355 xfs_buf_delwri_queue(bp, &buffer_list); 1356 xfs_buf_relse(bp); 1357 1358 /* don't hold too many buffers at once */ 1359 if (pag_agno(pag) % 16) 1360 continue; 1361 1362 error = xfs_buf_delwri_submit(&buffer_list); 1363 if (error) { 1364 xfs_warn(mp, 1365 "write error %d updating a secondary superblock near ag %d", 1366 error, pag_agno(pag)); 1367 if (!saved_error) 1368 saved_error = error; 1369 continue; 1370 } 1371 } 1372 error = xfs_buf_delwri_submit(&buffer_list); 1373 if (error) 1374 xfs_warn(mp, "error %d writing secondary superblocks", error); 1375 return saved_error ? saved_error : error; 1376 } 1377 1378 /* 1379 * Same behavior as xfs_sync_sb, except that it is always synchronous and it 1380 * also writes the superblock buffer to disk sector 0 immediately. 1381 */ 1382 int 1383 xfs_sync_sb_buf( 1384 struct xfs_mount *mp, 1385 bool update_rtsb) 1386 { 1387 struct xfs_trans *tp; 1388 struct xfs_buf *bp; 1389 struct xfs_buf *rtsb_bp = NULL; 1390 int error; 1391 1392 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_sb, 0, 0, 0, &tp); 1393 if (error) 1394 return error; 1395 1396 bp = xfs_trans_getsb(tp); 1397 xfs_log_sb(tp); 1398 xfs_trans_bhold(tp, bp); 1399 if (update_rtsb) { 1400 rtsb_bp = xfs_log_rtsb(tp, bp); 1401 if (rtsb_bp) 1402 xfs_trans_bhold(tp, rtsb_bp); 1403 } 1404 xfs_trans_set_sync(tp); 1405 error = xfs_trans_commit(tp); 1406 if (error) 1407 goto out; 1408 /* 1409 * write out the sb buffer to get the changes to disk 1410 */ 1411 error = xfs_bwrite(bp); 1412 if (!error && rtsb_bp) 1413 error = xfs_bwrite(rtsb_bp); 1414 out: 1415 if (rtsb_bp) 1416 xfs_buf_relse(rtsb_bp); 1417 xfs_buf_relse(bp); 1418 return error; 1419 } 1420 1421 void 1422 xfs_fs_geometry( 1423 struct xfs_mount *mp, 1424 struct xfs_fsop_geom *geo, 1425 int struct_version) 1426 { 1427 struct xfs_sb *sbp = &mp->m_sb; 1428 1429 memset(geo, 0, sizeof(struct xfs_fsop_geom)); 1430 1431 geo->blocksize = sbp->sb_blocksize; 1432 geo->rtextsize = sbp->sb_rextsize; 1433 geo->agblocks = sbp->sb_agblocks; 1434 geo->agcount = sbp->sb_agcount; 1435 geo->logblocks = sbp->sb_logblocks; 1436 geo->sectsize = sbp->sb_sectsize; 1437 geo->inodesize = sbp->sb_inodesize; 1438 geo->imaxpct = sbp->sb_imax_pct; 1439 geo->datablocks = sbp->sb_dblocks; 1440 geo->rtblocks = sbp->sb_rblocks; 1441 geo->rtextents = sbp->sb_rextents; 1442 geo->logstart = sbp->sb_logstart; 1443 BUILD_BUG_ON(sizeof(geo->uuid) != sizeof(sbp->sb_uuid)); 1444 memcpy(geo->uuid, &sbp->sb_uuid, sizeof(sbp->sb_uuid)); 1445 1446 if (struct_version < 2) 1447 return; 1448 1449 geo->sunit = sbp->sb_unit; 1450 geo->swidth = sbp->sb_width; 1451 1452 if (struct_version < 3) 1453 return; 1454 1455 geo->version = XFS_FSOP_GEOM_VERSION; 1456 geo->flags = XFS_FSOP_GEOM_FLAGS_NLINK | 1457 XFS_FSOP_GEOM_FLAGS_DIRV2 | 1458 XFS_FSOP_GEOM_FLAGS_EXTFLG; 1459 if (xfs_has_attr(mp)) 1460 geo->flags |= XFS_FSOP_GEOM_FLAGS_ATTR; 1461 if (xfs_has_quota(mp)) 1462 geo->flags |= XFS_FSOP_GEOM_FLAGS_QUOTA; 1463 if (xfs_has_align(mp)) 1464 geo->flags |= XFS_FSOP_GEOM_FLAGS_IALIGN; 1465 if (xfs_has_dalign(mp)) 1466 geo->flags |= XFS_FSOP_GEOM_FLAGS_DALIGN; 1467 if (xfs_has_asciici(mp)) 1468 geo->flags |= XFS_FSOP_GEOM_FLAGS_DIRV2CI; 1469 if (xfs_has_lazysbcount(mp)) 1470 geo->flags |= XFS_FSOP_GEOM_FLAGS_LAZYSB; 1471 if (xfs_has_attr2(mp)) 1472 geo->flags |= XFS_FSOP_GEOM_FLAGS_ATTR2; 1473 if (xfs_has_projid32(mp)) 1474 geo->flags |= XFS_FSOP_GEOM_FLAGS_PROJID32; 1475 if (xfs_has_crc(mp)) 1476 geo->flags |= XFS_FSOP_GEOM_FLAGS_V5SB; 1477 if (xfs_has_ftype(mp)) 1478 geo->flags |= XFS_FSOP_GEOM_FLAGS_FTYPE; 1479 if (xfs_has_finobt(mp)) 1480 geo->flags |= XFS_FSOP_GEOM_FLAGS_FINOBT; 1481 if (xfs_has_sparseinodes(mp)) 1482 geo->flags |= XFS_FSOP_GEOM_FLAGS_SPINODES; 1483 if (xfs_has_rmapbt(mp)) 1484 geo->flags |= XFS_FSOP_GEOM_FLAGS_RMAPBT; 1485 if (xfs_has_reflink(mp)) 1486 geo->flags |= XFS_FSOP_GEOM_FLAGS_REFLINK; 1487 if (xfs_has_bigtime(mp)) 1488 geo->flags |= XFS_FSOP_GEOM_FLAGS_BIGTIME; 1489 if (xfs_has_inobtcounts(mp)) 1490 geo->flags |= XFS_FSOP_GEOM_FLAGS_INOBTCNT; 1491 if (xfs_has_parent(mp)) 1492 geo->flags |= XFS_FSOP_GEOM_FLAGS_PARENT; 1493 if (xfs_has_sector(mp)) { 1494 geo->flags |= XFS_FSOP_GEOM_FLAGS_SECTOR; 1495 geo->logsectsize = sbp->sb_logsectsize; 1496 } else { 1497 geo->logsectsize = BBSIZE; 1498 } 1499 if (xfs_has_large_extent_counts(mp)) 1500 geo->flags |= XFS_FSOP_GEOM_FLAGS_NREXT64; 1501 if (xfs_has_exchange_range(mp)) 1502 geo->flags |= XFS_FSOP_GEOM_FLAGS_EXCHANGE_RANGE; 1503 if (xfs_has_metadir(mp)) 1504 geo->flags |= XFS_FSOP_GEOM_FLAGS_METADIR; 1505 geo->rtsectsize = sbp->sb_blocksize; 1506 geo->dirblocksize = xfs_dir2_dirblock_bytes(sbp); 1507 1508 if (struct_version < 4) 1509 return; 1510 1511 if (xfs_has_logv2(mp)) 1512 geo->flags |= XFS_FSOP_GEOM_FLAGS_LOGV2; 1513 1514 geo->logsunit = sbp->sb_logsunit; 1515 1516 if (struct_version < 5) 1517 return; 1518 1519 geo->version = XFS_FSOP_GEOM_VERSION_V5; 1520 1521 if (xfs_has_rtgroups(mp)) { 1522 geo->rgcount = sbp->sb_rgcount; 1523 geo->rgextents = sbp->sb_rgextents; 1524 } 1525 } 1526 1527 /* Read a secondary superblock. */ 1528 int 1529 xfs_sb_read_secondary( 1530 struct xfs_mount *mp, 1531 struct xfs_trans *tp, 1532 xfs_agnumber_t agno, 1533 struct xfs_buf **bpp) 1534 { 1535 struct xfs_buf *bp; 1536 int error; 1537 1538 ASSERT(agno != 0 && agno != NULLAGNUMBER); 1539 error = xfs_trans_read_buf(mp, tp, mp->m_ddev_targp, 1540 XFS_AG_DADDR(mp, agno, XFS_SB_BLOCK(mp)), 1541 XFS_FSS_TO_BB(mp, 1), 0, &bp, &xfs_sb_buf_ops); 1542 if (xfs_metadata_is_sick(error)) 1543 xfs_agno_mark_sick(mp, agno, XFS_SICK_AG_SB); 1544 if (error) 1545 return error; 1546 xfs_buf_set_ref(bp, XFS_SSB_REF); 1547 *bpp = bp; 1548 return 0; 1549 } 1550 1551 /* Get an uninitialised secondary superblock buffer. */ 1552 int 1553 xfs_sb_get_secondary( 1554 struct xfs_mount *mp, 1555 struct xfs_trans *tp, 1556 xfs_agnumber_t agno, 1557 struct xfs_buf **bpp) 1558 { 1559 struct xfs_buf *bp; 1560 int error; 1561 1562 ASSERT(agno != 0 && agno != NULLAGNUMBER); 1563 error = xfs_trans_get_buf(tp, mp->m_ddev_targp, 1564 XFS_AG_DADDR(mp, agno, XFS_SB_BLOCK(mp)), 1565 XFS_FSS_TO_BB(mp, 1), 0, &bp); 1566 if (error) 1567 return error; 1568 bp->b_ops = &xfs_sb_buf_ops; 1569 xfs_buf_oneshot(bp); 1570 *bpp = bp; 1571 return 0; 1572 } 1573 1574 /* 1575 * sunit, swidth, sectorsize(optional with 0) should be all in bytes, so users 1576 * won't be confused by values in error messages. This function returns false 1577 * if the stripe geometry is invalid and the caller is unable to repair the 1578 * stripe configuration later in the mount process. 1579 */ 1580 bool 1581 xfs_validate_stripe_geometry( 1582 struct xfs_mount *mp, 1583 __s64 sunit, 1584 __s64 swidth, 1585 int sectorsize, 1586 bool may_repair, 1587 bool silent) 1588 { 1589 if (swidth > INT_MAX) { 1590 if (!silent) 1591 xfs_notice(mp, 1592 "stripe width (%lld) is too large", swidth); 1593 goto check_override; 1594 } 1595 1596 if (sunit > swidth) { 1597 if (!silent) 1598 xfs_notice(mp, 1599 "stripe unit (%lld) is larger than the stripe width (%lld)", sunit, swidth); 1600 goto check_override; 1601 } 1602 1603 if (sectorsize && (int)sunit % sectorsize) { 1604 if (!silent) 1605 xfs_notice(mp, 1606 "stripe unit (%lld) must be a multiple of the sector size (%d)", 1607 sunit, sectorsize); 1608 goto check_override; 1609 } 1610 1611 if (sunit && !swidth) { 1612 if (!silent) 1613 xfs_notice(mp, 1614 "invalid stripe unit (%lld) and stripe width of 0", sunit); 1615 goto check_override; 1616 } 1617 1618 if (!sunit && swidth) { 1619 if (!silent) 1620 xfs_notice(mp, 1621 "invalid stripe width (%lld) and stripe unit of 0", swidth); 1622 goto check_override; 1623 } 1624 1625 if (sunit && (int)swidth % (int)sunit) { 1626 if (!silent) 1627 xfs_notice(mp, 1628 "stripe width (%lld) must be a multiple of the stripe unit (%lld)", 1629 swidth, sunit); 1630 goto check_override; 1631 } 1632 return true; 1633 1634 check_override: 1635 if (!may_repair) 1636 return false; 1637 /* 1638 * During mount, mp->m_dalign will not be set unless the sunit mount 1639 * option was set. If it was set, ignore the bad stripe alignment values 1640 * and allow the validation and overwrite later in the mount process to 1641 * attempt to overwrite the bad stripe alignment values with the values 1642 * supplied by mount options. 1643 */ 1644 if (!mp->m_dalign) 1645 return false; 1646 if (!silent) 1647 xfs_notice(mp, 1648 "Will try to correct with specified mount options sunit (%d) and swidth (%d)", 1649 BBTOB(mp->m_dalign), BBTOB(mp->m_swidth)); 1650 return true; 1651 } 1652 1653 /* 1654 * Compute the maximum level number of the realtime summary file, as defined by 1655 * mkfs. The historic use of highbit32 on a 64-bit quantity prohibited correct 1656 * use of rt volumes with more than 2^32 extents. 1657 */ 1658 uint8_t 1659 xfs_compute_rextslog( 1660 xfs_rtbxlen_t rtextents) 1661 { 1662 if (!rtextents) 1663 return 0; 1664 return xfs_highbit64(rtextents); 1665 } 1666