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