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