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 #include "xfs_rtrmap_btree.h" 32 #include "xfs_rtrefcount_btree.h" 33 34 /* 35 * Physical superblock buffer manipulations. Shared with libxfs in userspace. 36 */ 37 38 /* 39 * Check that all the V4 feature bits that the V5 filesystem format requires are 40 * correctly set. 41 */ 42 static bool 43 xfs_sb_validate_v5_features( 44 struct xfs_sb *sbp) 45 { 46 /* We must not have any unknown V4 feature bits set */ 47 if (sbp->sb_versionnum & ~XFS_SB_VERSION_OKBITS) 48 return false; 49 50 /* 51 * The CRC bit is considered an invalid V4 flag, so we have to add it 52 * manually to the OKBITS mask. 53 */ 54 if (sbp->sb_features2 & ~(XFS_SB_VERSION2_OKBITS | 55 XFS_SB_VERSION2_CRCBIT)) 56 return false; 57 58 /* Now check all the required V4 feature flags are set. */ 59 60 #define V5_VERS_FLAGS (XFS_SB_VERSION_NLINKBIT | \ 61 XFS_SB_VERSION_ALIGNBIT | \ 62 XFS_SB_VERSION_LOGV2BIT | \ 63 XFS_SB_VERSION_EXTFLGBIT | \ 64 XFS_SB_VERSION_DIRV2BIT | \ 65 XFS_SB_VERSION_MOREBITSBIT) 66 67 #define V5_FEAT_FLAGS (XFS_SB_VERSION2_LAZYSBCOUNTBIT | \ 68 XFS_SB_VERSION2_ATTR2BIT | \ 69 XFS_SB_VERSION2_PROJID32BIT | \ 70 XFS_SB_VERSION2_CRCBIT) 71 72 if ((sbp->sb_versionnum & V5_VERS_FLAGS) != V5_VERS_FLAGS) 73 return false; 74 if ((sbp->sb_features2 & V5_FEAT_FLAGS) != V5_FEAT_FLAGS) 75 return false; 76 return true; 77 } 78 79 /* 80 * We current support XFS v5 formats with known features and v4 superblocks with 81 * at least V2 directories. 82 */ 83 bool 84 xfs_sb_good_version( 85 struct xfs_sb *sbp) 86 { 87 /* 88 * All v5 filesystems are supported, but we must check that all the 89 * required v4 feature flags are enabled correctly as the code checks 90 * those flags and not for v5 support. 91 */ 92 if (xfs_sb_is_v5(sbp)) 93 return xfs_sb_validate_v5_features(sbp); 94 95 /* versions prior to v4 are not supported */ 96 if (XFS_SB_VERSION_NUM(sbp) != XFS_SB_VERSION_4) 97 return false; 98 99 /* We must not have any unknown v4 feature bits set */ 100 if ((sbp->sb_versionnum & ~XFS_SB_VERSION_OKBITS) || 101 ((sbp->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT) && 102 (sbp->sb_features2 & ~XFS_SB_VERSION2_OKBITS))) 103 return false; 104 105 /* V4 filesystems need v2 directories and unwritten extents */ 106 if (!(sbp->sb_versionnum & XFS_SB_VERSION_DIRV2BIT)) 107 return false; 108 if (!(sbp->sb_versionnum & XFS_SB_VERSION_EXTFLGBIT)) 109 return false; 110 111 /* It's a supported v4 filesystem */ 112 return true; 113 } 114 115 uint64_t 116 xfs_sb_version_to_features( 117 struct xfs_sb *sbp) 118 { 119 uint64_t features = 0; 120 121 /* optional V4 features */ 122 if (sbp->sb_rblocks > 0) 123 features |= XFS_FEAT_REALTIME; 124 if (sbp->sb_versionnum & XFS_SB_VERSION_NLINKBIT) 125 features |= XFS_FEAT_NLINK; 126 if (sbp->sb_versionnum & XFS_SB_VERSION_ATTRBIT) 127 features |= XFS_FEAT_ATTR; 128 if (sbp->sb_versionnum & XFS_SB_VERSION_QUOTABIT) 129 features |= XFS_FEAT_QUOTA; 130 if (sbp->sb_versionnum & XFS_SB_VERSION_ALIGNBIT) 131 features |= XFS_FEAT_ALIGN; 132 if (sbp->sb_versionnum & XFS_SB_VERSION_LOGV2BIT) 133 features |= XFS_FEAT_LOGV2; 134 if (sbp->sb_versionnum & XFS_SB_VERSION_DALIGNBIT) 135 features |= XFS_FEAT_DALIGN; 136 if (sbp->sb_versionnum & XFS_SB_VERSION_EXTFLGBIT) 137 features |= XFS_FEAT_EXTFLG; 138 if (sbp->sb_versionnum & XFS_SB_VERSION_SECTORBIT) 139 features |= XFS_FEAT_SECTOR; 140 if (sbp->sb_versionnum & XFS_SB_VERSION_BORGBIT) 141 features |= XFS_FEAT_ASCIICI; 142 if (sbp->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT) { 143 if (sbp->sb_features2 & XFS_SB_VERSION2_LAZYSBCOUNTBIT) 144 features |= XFS_FEAT_LAZYSBCOUNT; 145 if (sbp->sb_features2 & XFS_SB_VERSION2_ATTR2BIT) 146 features |= XFS_FEAT_ATTR2; 147 if (sbp->sb_features2 & XFS_SB_VERSION2_PROJID32BIT) 148 features |= XFS_FEAT_PROJID32; 149 if (sbp->sb_features2 & XFS_SB_VERSION2_FTYPE) 150 features |= XFS_FEAT_FTYPE; 151 } 152 153 if (!xfs_sb_is_v5(sbp)) 154 return features; 155 156 /* Always on V5 features */ 157 features |= XFS_FEAT_ALIGN | XFS_FEAT_LOGV2 | XFS_FEAT_EXTFLG | 158 XFS_FEAT_LAZYSBCOUNT | XFS_FEAT_ATTR2 | XFS_FEAT_PROJID32 | 159 XFS_FEAT_V3INODES | XFS_FEAT_CRC | XFS_FEAT_PQUOTINO; 160 161 /* Optional V5 features */ 162 if (sbp->sb_features_ro_compat & XFS_SB_FEAT_RO_COMPAT_FINOBT) 163 features |= XFS_FEAT_FINOBT; 164 if (sbp->sb_features_ro_compat & XFS_SB_FEAT_RO_COMPAT_RMAPBT) 165 features |= XFS_FEAT_RMAPBT; 166 if (sbp->sb_features_ro_compat & XFS_SB_FEAT_RO_COMPAT_REFLINK) 167 features |= XFS_FEAT_REFLINK; 168 if (sbp->sb_features_ro_compat & XFS_SB_FEAT_RO_COMPAT_INOBTCNT) 169 features |= XFS_FEAT_INOBTCNT; 170 if (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_FTYPE) 171 features |= XFS_FEAT_FTYPE; 172 if (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_SPINODES) 173 features |= XFS_FEAT_SPINODES; 174 if (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_META_UUID) 175 features |= XFS_FEAT_META_UUID; 176 if (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_BIGTIME) 177 features |= XFS_FEAT_BIGTIME; 178 if (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_NEEDSREPAIR) 179 features |= XFS_FEAT_NEEDSREPAIR; 180 if (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_NREXT64) 181 features |= XFS_FEAT_NREXT64; 182 if (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_EXCHRANGE) 183 features |= XFS_FEAT_EXCHANGE_RANGE; 184 if (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_PARENT) 185 features |= XFS_FEAT_PARENT; 186 if (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_METADIR) 187 features |= XFS_FEAT_METADIR; 188 189 return features; 190 } 191 192 /* Check all the superblock fields we care about when reading one in. */ 193 STATIC int 194 xfs_validate_sb_read( 195 struct xfs_mount *mp, 196 struct xfs_sb *sbp) 197 { 198 if (!xfs_sb_is_v5(sbp)) 199 return 0; 200 201 /* 202 * Version 5 superblock feature mask validation. Reject combinations 203 * the kernel cannot support up front before checking anything else. 204 */ 205 if (xfs_sb_has_compat_feature(sbp, XFS_SB_FEAT_COMPAT_UNKNOWN)) { 206 xfs_warn(mp, 207 "Superblock has unknown compatible features (0x%x) enabled.", 208 (sbp->sb_features_compat & XFS_SB_FEAT_COMPAT_UNKNOWN)); 209 xfs_warn(mp, 210 "Using a more recent kernel is recommended."); 211 } 212 213 if (xfs_sb_has_ro_compat_feature(sbp, XFS_SB_FEAT_RO_COMPAT_UNKNOWN)) { 214 xfs_alert(mp, 215 "Superblock has unknown read-only compatible features (0x%x) enabled.", 216 (sbp->sb_features_ro_compat & 217 XFS_SB_FEAT_RO_COMPAT_UNKNOWN)); 218 if (!xfs_is_readonly(mp)) { 219 xfs_warn(mp, 220 "Attempted to mount read-only compatible filesystem read-write."); 221 xfs_warn(mp, 222 "Filesystem can only be safely mounted read only."); 223 224 return -EINVAL; 225 } 226 } 227 if (xfs_sb_has_incompat_feature(sbp, XFS_SB_FEAT_INCOMPAT_UNKNOWN)) { 228 xfs_warn(mp, 229 "Superblock has unknown incompatible features (0x%x) enabled.", 230 (sbp->sb_features_incompat & 231 XFS_SB_FEAT_INCOMPAT_UNKNOWN)); 232 xfs_warn(mp, 233 "Filesystem cannot be safely mounted by this kernel."); 234 return -EINVAL; 235 } 236 237 return 0; 238 } 239 240 /* Return the number of extents covered by a single rt bitmap file */ 241 static xfs_rtbxlen_t 242 xfs_extents_per_rbm( 243 struct xfs_sb *sbp) 244 { 245 if (xfs_sb_is_v5(sbp) && 246 (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_METADIR)) 247 return sbp->sb_rgextents; 248 return sbp->sb_rextents; 249 } 250 251 /* 252 * Return the payload size of a single rt bitmap block (without the metadata 253 * header if any). 254 */ 255 static inline unsigned int 256 xfs_rtbmblock_size( 257 struct xfs_sb *sbp) 258 { 259 if (xfs_sb_is_v5(sbp) && 260 (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_METADIR)) 261 return sbp->sb_blocksize - sizeof(struct xfs_rtbuf_blkinfo); 262 return sbp->sb_blocksize; 263 } 264 265 static uint64_t 266 xfs_expected_rbmblocks( 267 struct xfs_sb *sbp) 268 { 269 return howmany_64(xfs_extents_per_rbm(sbp), 270 NBBY * xfs_rtbmblock_size(sbp)); 271 } 272 273 /* Validate the realtime geometry */ 274 bool 275 xfs_validate_rt_geometry( 276 struct xfs_sb *sbp) 277 { 278 if (sbp->sb_rextsize * sbp->sb_blocksize > XFS_MAX_RTEXTSIZE || 279 sbp->sb_rextsize * sbp->sb_blocksize < XFS_MIN_RTEXTSIZE) 280 return false; 281 282 if (sbp->sb_rblocks == 0) { 283 if (sbp->sb_rextents != 0 || sbp->sb_rbmblocks != 0 || 284 sbp->sb_rextslog != 0 || sbp->sb_frextents != 0) 285 return false; 286 return true; 287 } 288 289 if (sbp->sb_rextents == 0 || 290 sbp->sb_rextents != div_u64(sbp->sb_rblocks, sbp->sb_rextsize) || 291 sbp->sb_rextslog != xfs_compute_rextslog(sbp->sb_rextents) || 292 sbp->sb_rbmblocks != xfs_expected_rbmblocks(sbp)) 293 return false; 294 295 return true; 296 } 297 298 /* Check all the superblock fields we care about when writing one out. */ 299 STATIC int 300 xfs_validate_sb_write( 301 struct xfs_mount *mp, 302 struct xfs_buf *bp, 303 struct xfs_sb *sbp) 304 { 305 /* 306 * Carry out additional sb summary counter sanity checks when we write 307 * the superblock. We skip this in the read validator because there 308 * could be newer superblocks in the log and if the values are garbage 309 * even after replay we'll recalculate them at the end of log mount. 310 * 311 * mkfs has traditionally written zeroed counters to inprogress and 312 * secondary superblocks, so allow this usage to continue because 313 * we never read counters from such superblocks. 314 */ 315 if (xfs_buf_daddr(bp) == XFS_SB_DADDR && !sbp->sb_inprogress && 316 (sbp->sb_fdblocks > sbp->sb_dblocks || 317 !xfs_verify_icount(mp, sbp->sb_icount) || 318 sbp->sb_ifree > sbp->sb_icount)) { 319 xfs_warn(mp, "SB summary counter sanity check failed"); 320 return -EFSCORRUPTED; 321 } 322 323 if (!xfs_sb_is_v5(sbp)) 324 return 0; 325 326 /* 327 * Version 5 superblock feature mask validation. Reject combinations 328 * the kernel cannot support since we checked for unsupported bits in 329 * the read verifier, which means that memory is corrupt. 330 */ 331 if (!xfs_is_readonly(mp) && 332 xfs_sb_has_ro_compat_feature(sbp, XFS_SB_FEAT_RO_COMPAT_UNKNOWN)) { 333 xfs_alert(mp, 334 "Corruption detected in superblock read-only compatible features (0x%x)!", 335 (sbp->sb_features_ro_compat & 336 XFS_SB_FEAT_RO_COMPAT_UNKNOWN)); 337 return -EFSCORRUPTED; 338 } 339 if (xfs_sb_has_incompat_feature(sbp, XFS_SB_FEAT_INCOMPAT_UNKNOWN)) { 340 xfs_warn(mp, 341 "Corruption detected in superblock incompatible features (0x%x)!", 342 (sbp->sb_features_incompat & 343 XFS_SB_FEAT_INCOMPAT_UNKNOWN)); 344 return -EFSCORRUPTED; 345 } 346 if (xfs_sb_has_incompat_log_feature(sbp, 347 XFS_SB_FEAT_INCOMPAT_LOG_UNKNOWN)) { 348 xfs_warn(mp, 349 "Corruption detected in superblock incompatible log features (0x%x)!", 350 (sbp->sb_features_log_incompat & 351 XFS_SB_FEAT_INCOMPAT_LOG_UNKNOWN)); 352 return -EFSCORRUPTED; 353 } 354 355 /* 356 * We can't read verify the sb LSN because the read verifier is called 357 * before the log is allocated and processed. We know the log is set up 358 * before write verifier calls, so check it here. 359 */ 360 if (!xfs_log_check_lsn(mp, sbp->sb_lsn)) 361 return -EFSCORRUPTED; 362 363 return 0; 364 } 365 366 int 367 xfs_compute_rgblklog( 368 xfs_rtxlen_t rgextents, 369 xfs_rgblock_t rextsize) 370 { 371 uint64_t rgblocks = (uint64_t)rgextents * rextsize; 372 373 return xfs_highbit64(rgblocks - 1) + 1; 374 } 375 376 static int 377 xfs_validate_sb_rtgroups( 378 struct xfs_mount *mp, 379 struct xfs_sb *sbp) 380 { 381 uint64_t groups; 382 int rgblklog; 383 384 if (sbp->sb_rextsize == 0) { 385 xfs_warn(mp, 386 "Realtime extent size must not be zero."); 387 return -EINVAL; 388 } 389 390 if (sbp->sb_rgextents > XFS_MAX_RGBLOCKS / sbp->sb_rextsize) { 391 xfs_warn(mp, 392 "Realtime group size (%u) must be less than %u rt extents.", 393 sbp->sb_rgextents, 394 XFS_MAX_RGBLOCKS / sbp->sb_rextsize); 395 return -EINVAL; 396 } 397 398 if (sbp->sb_rgextents < XFS_MIN_RGEXTENTS) { 399 xfs_warn(mp, 400 "Realtime group size (%u) must be at least %u rt extents.", 401 sbp->sb_rgextents, XFS_MIN_RGEXTENTS); 402 return -EINVAL; 403 } 404 405 if (sbp->sb_rgcount > XFS_MAX_RGNUMBER) { 406 xfs_warn(mp, 407 "Realtime groups (%u) must be less than %u.", 408 sbp->sb_rgcount, XFS_MAX_RGNUMBER); 409 return -EINVAL; 410 } 411 412 groups = howmany_64(sbp->sb_rextents, sbp->sb_rgextents); 413 if (groups != sbp->sb_rgcount) { 414 xfs_warn(mp, 415 "Realtime groups (%u) do not cover the entire rt section; need (%llu) groups.", 416 sbp->sb_rgcount, groups); 417 return -EINVAL; 418 } 419 420 /* Exchange-range is required for fsr to work on realtime files */ 421 if (!(sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_EXCHRANGE)) { 422 xfs_warn(mp, 423 "Realtime groups feature requires exchange-range support."); 424 return -EINVAL; 425 } 426 427 rgblklog = xfs_compute_rgblklog(sbp->sb_rgextents, sbp->sb_rextsize); 428 if (sbp->sb_rgblklog != rgblklog) { 429 xfs_warn(mp, 430 "Realtime group log (%d) does not match expected value (%d).", 431 sbp->sb_rgblklog, rgblklog); 432 return -EINVAL; 433 } 434 435 return 0; 436 } 437 438 /* Check the validity of the SB. */ 439 STATIC int 440 xfs_validate_sb_common( 441 struct xfs_mount *mp, 442 struct xfs_buf *bp, 443 struct xfs_sb *sbp) 444 { 445 struct xfs_dsb *dsb = bp->b_addr; 446 uint32_t agcount = 0; 447 uint32_t rem; 448 bool has_dalign; 449 int error; 450 451 if (!xfs_verify_magic(bp, dsb->sb_magicnum)) { 452 xfs_warn(mp, 453 "Superblock has bad magic number 0x%x. Not an XFS filesystem?", 454 be32_to_cpu(dsb->sb_magicnum)); 455 return -EWRONGFS; 456 } 457 458 if (!xfs_sb_good_version(sbp)) { 459 xfs_warn(mp, 460 "Superblock has unknown features enabled or corrupted feature masks."); 461 return -EWRONGFS; 462 } 463 464 /* 465 * Validate feature flags and state 466 */ 467 if (xfs_sb_is_v5(sbp)) { 468 if (sbp->sb_blocksize < XFS_MIN_CRC_BLOCKSIZE) { 469 xfs_notice(mp, 470 "Block size (%u bytes) too small for Version 5 superblock (minimum %d bytes)", 471 sbp->sb_blocksize, XFS_MIN_CRC_BLOCKSIZE); 472 return -EFSCORRUPTED; 473 } 474 475 /* V5 has a separate project quota inode */ 476 if (sbp->sb_qflags & (XFS_OQUOTA_ENFD | XFS_OQUOTA_CHKD)) { 477 xfs_notice(mp, 478 "Version 5 of Super block has XFS_OQUOTA bits."); 479 return -EFSCORRUPTED; 480 } 481 482 /* 483 * Full inode chunks must be aligned to inode chunk size when 484 * sparse inodes are enabled to support the sparse chunk 485 * allocation algorithm and prevent overlapping inode records. 486 */ 487 if (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_SPINODES) { 488 uint32_t align; 489 490 align = XFS_INODES_PER_CHUNK * sbp->sb_inodesize 491 >> sbp->sb_blocklog; 492 if (sbp->sb_inoalignmt != align) { 493 xfs_warn(mp, 494 "Inode block alignment (%u) must match chunk size (%u) for sparse inodes.", 495 sbp->sb_inoalignmt, align); 496 return -EINVAL; 497 } 498 499 if (sbp->sb_spino_align && 500 (sbp->sb_spino_align > sbp->sb_inoalignmt || 501 (sbp->sb_inoalignmt % sbp->sb_spino_align) != 0)) { 502 xfs_warn(mp, 503 "Sparse inode alignment (%u) is invalid, must be integer factor of (%u).", 504 sbp->sb_spino_align, 505 sbp->sb_inoalignmt); 506 return -EINVAL; 507 } 508 } else if (sbp->sb_spino_align) { 509 xfs_warn(mp, 510 "Sparse inode alignment (%u) should be zero.", 511 sbp->sb_spino_align); 512 return -EINVAL; 513 } 514 515 if (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_METADIR) { 516 if (memchr_inv(sbp->sb_pad, 0, sizeof(sbp->sb_pad))) { 517 xfs_warn(mp, 518 "Metadir superblock padding fields must be zero."); 519 return -EINVAL; 520 } 521 522 error = xfs_validate_sb_rtgroups(mp, sbp); 523 if (error) 524 return error; 525 } 526 } else if (sbp->sb_qflags & (XFS_PQUOTA_ENFD | XFS_GQUOTA_ENFD | 527 XFS_PQUOTA_CHKD | XFS_GQUOTA_CHKD)) { 528 xfs_notice(mp, 529 "Superblock earlier than Version 5 has XFS_{P|G}QUOTA_{ENFD|CHKD} bits."); 530 return -EFSCORRUPTED; 531 } 532 533 if (unlikely( 534 sbp->sb_logstart == 0 && mp->m_logdev_targp == mp->m_ddev_targp)) { 535 xfs_warn(mp, 536 "filesystem is marked as having an external log; " 537 "specify logdev on the mount command line."); 538 return -EINVAL; 539 } 540 541 if (unlikely( 542 sbp->sb_logstart != 0 && mp->m_logdev_targp != mp->m_ddev_targp)) { 543 xfs_warn(mp, 544 "filesystem is marked as having an internal log; " 545 "do not specify logdev on the mount command line."); 546 return -EINVAL; 547 } 548 549 /* Compute agcount for this number of dblocks and agblocks */ 550 if (sbp->sb_agblocks) { 551 agcount = div_u64_rem(sbp->sb_dblocks, sbp->sb_agblocks, &rem); 552 if (rem) 553 agcount++; 554 } 555 556 /* 557 * More sanity checking. Most of these were stolen directly from 558 * xfs_repair. 559 */ 560 if (unlikely( 561 sbp->sb_agcount <= 0 || 562 sbp->sb_sectsize < XFS_MIN_SECTORSIZE || 563 sbp->sb_sectsize > XFS_MAX_SECTORSIZE || 564 sbp->sb_sectlog < XFS_MIN_SECTORSIZE_LOG || 565 sbp->sb_sectlog > XFS_MAX_SECTORSIZE_LOG || 566 sbp->sb_sectsize != (1 << sbp->sb_sectlog) || 567 sbp->sb_blocksize < XFS_MIN_BLOCKSIZE || 568 sbp->sb_blocksize > XFS_MAX_BLOCKSIZE || 569 sbp->sb_blocklog < XFS_MIN_BLOCKSIZE_LOG || 570 sbp->sb_blocklog > XFS_MAX_BLOCKSIZE_LOG || 571 sbp->sb_blocksize != (1 << sbp->sb_blocklog) || 572 sbp->sb_dirblklog + sbp->sb_blocklog > XFS_MAX_BLOCKSIZE_LOG || 573 sbp->sb_inodesize < XFS_DINODE_MIN_SIZE || 574 sbp->sb_inodesize > XFS_DINODE_MAX_SIZE || 575 sbp->sb_inodelog < XFS_DINODE_MIN_LOG || 576 sbp->sb_inodelog > XFS_DINODE_MAX_LOG || 577 sbp->sb_inodesize != (1 << sbp->sb_inodelog) || 578 sbp->sb_inopblock != howmany(sbp->sb_blocksize,sbp->sb_inodesize) || 579 XFS_FSB_TO_B(mp, sbp->sb_agblocks) < XFS_MIN_AG_BYTES || 580 XFS_FSB_TO_B(mp, sbp->sb_agblocks) > XFS_MAX_AG_BYTES || 581 sbp->sb_agblklog != xfs_highbit32(sbp->sb_agblocks - 1) + 1 || 582 agcount == 0 || agcount != sbp->sb_agcount || 583 (sbp->sb_blocklog - sbp->sb_inodelog != sbp->sb_inopblog) || 584 (sbp->sb_rextsize * sbp->sb_blocksize > XFS_MAX_RTEXTSIZE) || 585 (sbp->sb_rextsize * sbp->sb_blocksize < XFS_MIN_RTEXTSIZE) || 586 (sbp->sb_imax_pct > 100 /* zero sb_imax_pct is valid */) || 587 sbp->sb_dblocks == 0 || 588 sbp->sb_dblocks > XFS_MAX_DBLOCKS(sbp) || 589 sbp->sb_dblocks < XFS_MIN_DBLOCKS(sbp) || 590 sbp->sb_shared_vn != 0)) { 591 xfs_notice(mp, "SB sanity check failed"); 592 return -EFSCORRUPTED; 593 } 594 595 /* 596 * Logs that are too large are not supported at all. Reject them 597 * outright. Logs that are too small are tolerated on v4 filesystems, 598 * but we can only check that when mounting the log. Hence we skip 599 * those checks here. 600 */ 601 if (sbp->sb_logblocks > XFS_MAX_LOG_BLOCKS) { 602 xfs_notice(mp, 603 "Log size 0x%x blocks too large, maximum size is 0x%llx blocks", 604 sbp->sb_logblocks, XFS_MAX_LOG_BLOCKS); 605 return -EFSCORRUPTED; 606 } 607 608 if (XFS_FSB_TO_B(mp, sbp->sb_logblocks) > XFS_MAX_LOG_BYTES) { 609 xfs_warn(mp, 610 "log size 0x%llx bytes too large, maximum size is 0x%llx bytes", 611 XFS_FSB_TO_B(mp, sbp->sb_logblocks), 612 XFS_MAX_LOG_BYTES); 613 return -EFSCORRUPTED; 614 } 615 616 /* 617 * Do not allow filesystems with corrupted log sector or stripe units to 618 * be mounted. We cannot safely size the iclogs or write to the log if 619 * the log stripe unit is not valid. 620 */ 621 if (sbp->sb_versionnum & XFS_SB_VERSION_SECTORBIT) { 622 if (sbp->sb_logsectsize != (1U << sbp->sb_logsectlog)) { 623 xfs_notice(mp, 624 "log sector size in bytes/log2 (0x%x/0x%x) must match", 625 sbp->sb_logsectsize, 1U << sbp->sb_logsectlog); 626 return -EFSCORRUPTED; 627 } 628 } else if (sbp->sb_logsectsize || sbp->sb_logsectlog) { 629 xfs_notice(mp, 630 "log sector size in bytes/log2 (0x%x/0x%x) are not zero", 631 sbp->sb_logsectsize, sbp->sb_logsectlog); 632 return -EFSCORRUPTED; 633 } 634 635 if (sbp->sb_logsunit > 1) { 636 if (sbp->sb_logsunit % sbp->sb_blocksize) { 637 xfs_notice(mp, 638 "log stripe unit 0x%x bytes must be a multiple of block size", 639 sbp->sb_logsunit); 640 return -EFSCORRUPTED; 641 } 642 if (sbp->sb_logsunit > XLOG_MAX_RECORD_BSIZE) { 643 xfs_notice(mp, 644 "log stripe unit 0x%x bytes over maximum size (0x%x bytes)", 645 sbp->sb_logsunit, XLOG_MAX_RECORD_BSIZE); 646 return -EFSCORRUPTED; 647 } 648 } 649 650 if (!xfs_validate_rt_geometry(sbp)) { 651 xfs_notice(mp, 652 "realtime %sgeometry check failed", 653 sbp->sb_rblocks ? "" : "zeroed "); 654 return -EFSCORRUPTED; 655 } 656 657 /* 658 * Either (sb_unit and !hasdalign) or (!sb_unit and hasdalign) 659 * would imply the image is corrupted. 660 */ 661 has_dalign = sbp->sb_versionnum & XFS_SB_VERSION_DALIGNBIT; 662 if (!!sbp->sb_unit ^ has_dalign) { 663 xfs_notice(mp, "SB stripe alignment sanity check failed"); 664 return -EFSCORRUPTED; 665 } 666 667 if (!xfs_validate_stripe_geometry(mp, XFS_FSB_TO_B(mp, sbp->sb_unit), 668 XFS_FSB_TO_B(mp, sbp->sb_width), 0, 669 xfs_buf_daddr(bp) == XFS_SB_DADDR, false)) 670 return -EFSCORRUPTED; 671 672 /* 673 * Currently only very few inode sizes are supported. 674 */ 675 switch (sbp->sb_inodesize) { 676 case 256: 677 case 512: 678 case 1024: 679 case 2048: 680 break; 681 default: 682 xfs_warn(mp, "inode size of %d bytes not supported", 683 sbp->sb_inodesize); 684 return -ENOSYS; 685 } 686 687 return 0; 688 } 689 690 void 691 xfs_sb_quota_from_disk(struct xfs_sb *sbp) 692 { 693 if (xfs_sb_is_v5(sbp) && 694 (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_METADIR)) { 695 sbp->sb_uquotino = NULLFSINO; 696 sbp->sb_gquotino = NULLFSINO; 697 sbp->sb_pquotino = NULLFSINO; 698 return; 699 } 700 701 /* 702 * older mkfs doesn't initialize quota inodes to NULLFSINO. This 703 * leads to in-core values having two different values for a quota 704 * inode to be invalid: 0 and NULLFSINO. Change it to a single value 705 * NULLFSINO. 706 * 707 * Note that this change affect only the in-core values. These 708 * values are not written back to disk unless any quota information 709 * is written to the disk. Even in that case, sb_pquotino field is 710 * not written to disk unless the superblock supports pquotino. 711 */ 712 if (sbp->sb_uquotino == 0) 713 sbp->sb_uquotino = NULLFSINO; 714 if (sbp->sb_gquotino == 0) 715 sbp->sb_gquotino = NULLFSINO; 716 if (sbp->sb_pquotino == 0) 717 sbp->sb_pquotino = NULLFSINO; 718 719 /* 720 * We need to do these manipilations only if we are working 721 * with an older version of on-disk superblock. 722 */ 723 if (xfs_sb_is_v5(sbp)) 724 return; 725 726 if (sbp->sb_qflags & XFS_OQUOTA_ENFD) 727 sbp->sb_qflags |= (sbp->sb_qflags & XFS_PQUOTA_ACCT) ? 728 XFS_PQUOTA_ENFD : XFS_GQUOTA_ENFD; 729 if (sbp->sb_qflags & XFS_OQUOTA_CHKD) 730 sbp->sb_qflags |= (sbp->sb_qflags & XFS_PQUOTA_ACCT) ? 731 XFS_PQUOTA_CHKD : XFS_GQUOTA_CHKD; 732 sbp->sb_qflags &= ~(XFS_OQUOTA_ENFD | XFS_OQUOTA_CHKD); 733 734 if (sbp->sb_qflags & XFS_PQUOTA_ACCT && 735 sbp->sb_gquotino != NULLFSINO) { 736 /* 737 * In older version of superblock, on-disk superblock only 738 * has sb_gquotino, and in-core superblock has both sb_gquotino 739 * and sb_pquotino. But, only one of them is supported at any 740 * point of time. So, if PQUOTA is set in disk superblock, 741 * copy over sb_gquotino to sb_pquotino. The NULLFSINO test 742 * above is to make sure we don't do this twice and wipe them 743 * both out! 744 */ 745 sbp->sb_pquotino = sbp->sb_gquotino; 746 sbp->sb_gquotino = NULLFSINO; 747 } 748 } 749 750 static void 751 __xfs_sb_from_disk( 752 struct xfs_sb *to, 753 struct xfs_dsb *from, 754 bool convert_xquota) 755 { 756 to->sb_magicnum = be32_to_cpu(from->sb_magicnum); 757 to->sb_blocksize = be32_to_cpu(from->sb_blocksize); 758 to->sb_dblocks = be64_to_cpu(from->sb_dblocks); 759 to->sb_rblocks = be64_to_cpu(from->sb_rblocks); 760 to->sb_rextents = be64_to_cpu(from->sb_rextents); 761 memcpy(&to->sb_uuid, &from->sb_uuid, sizeof(to->sb_uuid)); 762 to->sb_logstart = be64_to_cpu(from->sb_logstart); 763 to->sb_rootino = be64_to_cpu(from->sb_rootino); 764 to->sb_rbmino = be64_to_cpu(from->sb_rbmino); 765 to->sb_rsumino = be64_to_cpu(from->sb_rsumino); 766 to->sb_rextsize = be32_to_cpu(from->sb_rextsize); 767 to->sb_agblocks = be32_to_cpu(from->sb_agblocks); 768 to->sb_agcount = be32_to_cpu(from->sb_agcount); 769 to->sb_rbmblocks = be32_to_cpu(from->sb_rbmblocks); 770 to->sb_logblocks = be32_to_cpu(from->sb_logblocks); 771 to->sb_versionnum = be16_to_cpu(from->sb_versionnum); 772 to->sb_sectsize = be16_to_cpu(from->sb_sectsize); 773 to->sb_inodesize = be16_to_cpu(from->sb_inodesize); 774 to->sb_inopblock = be16_to_cpu(from->sb_inopblock); 775 memcpy(&to->sb_fname, &from->sb_fname, sizeof(to->sb_fname)); 776 to->sb_blocklog = from->sb_blocklog; 777 to->sb_sectlog = from->sb_sectlog; 778 to->sb_inodelog = from->sb_inodelog; 779 to->sb_inopblog = from->sb_inopblog; 780 to->sb_agblklog = from->sb_agblklog; 781 to->sb_rextslog = from->sb_rextslog; 782 to->sb_inprogress = from->sb_inprogress; 783 to->sb_imax_pct = from->sb_imax_pct; 784 to->sb_icount = be64_to_cpu(from->sb_icount); 785 to->sb_ifree = be64_to_cpu(from->sb_ifree); 786 to->sb_fdblocks = be64_to_cpu(from->sb_fdblocks); 787 to->sb_frextents = be64_to_cpu(from->sb_frextents); 788 to->sb_uquotino = be64_to_cpu(from->sb_uquotino); 789 to->sb_gquotino = be64_to_cpu(from->sb_gquotino); 790 to->sb_qflags = be16_to_cpu(from->sb_qflags); 791 to->sb_flags = from->sb_flags; 792 to->sb_shared_vn = from->sb_shared_vn; 793 to->sb_inoalignmt = be32_to_cpu(from->sb_inoalignmt); 794 to->sb_unit = be32_to_cpu(from->sb_unit); 795 to->sb_width = be32_to_cpu(from->sb_width); 796 to->sb_dirblklog = from->sb_dirblklog; 797 to->sb_logsectlog = from->sb_logsectlog; 798 to->sb_logsectsize = be16_to_cpu(from->sb_logsectsize); 799 to->sb_logsunit = be32_to_cpu(from->sb_logsunit); 800 to->sb_features2 = be32_to_cpu(from->sb_features2); 801 to->sb_bad_features2 = be32_to_cpu(from->sb_bad_features2); 802 to->sb_features_compat = be32_to_cpu(from->sb_features_compat); 803 to->sb_features_ro_compat = be32_to_cpu(from->sb_features_ro_compat); 804 to->sb_features_incompat = be32_to_cpu(from->sb_features_incompat); 805 to->sb_features_log_incompat = 806 be32_to_cpu(from->sb_features_log_incompat); 807 /* crc is only used on disk, not in memory; just init to 0 here. */ 808 to->sb_crc = 0; 809 to->sb_spino_align = be32_to_cpu(from->sb_spino_align); 810 to->sb_pquotino = be64_to_cpu(from->sb_pquotino); 811 to->sb_lsn = be64_to_cpu(from->sb_lsn); 812 /* 813 * sb_meta_uuid is only on disk if it differs from sb_uuid and the 814 * feature flag is set; if not set we keep it only in memory. 815 */ 816 if (xfs_sb_is_v5(to) && 817 (to->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_META_UUID)) 818 uuid_copy(&to->sb_meta_uuid, &from->sb_meta_uuid); 819 else 820 uuid_copy(&to->sb_meta_uuid, &from->sb_uuid); 821 /* Convert on-disk flags to in-memory flags? */ 822 if (convert_xquota) 823 xfs_sb_quota_from_disk(to); 824 825 if (to->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_METADIR) { 826 to->sb_metadirino = be64_to_cpu(from->sb_metadirino); 827 to->sb_rgblklog = from->sb_rgblklog; 828 memcpy(to->sb_pad, from->sb_pad, sizeof(to->sb_pad)); 829 to->sb_rgcount = be32_to_cpu(from->sb_rgcount); 830 to->sb_rgextents = be32_to_cpu(from->sb_rgextents); 831 to->sb_rbmino = NULLFSINO; 832 to->sb_rsumino = NULLFSINO; 833 } else { 834 to->sb_metadirino = NULLFSINO; 835 to->sb_rgcount = 1; 836 to->sb_rgextents = 0; 837 } 838 } 839 840 void 841 xfs_sb_from_disk( 842 struct xfs_sb *to, 843 struct xfs_dsb *from) 844 { 845 __xfs_sb_from_disk(to, from, true); 846 } 847 848 static void 849 xfs_sb_quota_to_disk( 850 struct xfs_dsb *to, 851 struct xfs_sb *from) 852 { 853 uint16_t qflags = from->sb_qflags; 854 855 if (xfs_sb_is_v5(from) && 856 (from->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_METADIR)) { 857 to->sb_qflags = cpu_to_be16(from->sb_qflags); 858 to->sb_uquotino = cpu_to_be64(0); 859 to->sb_gquotino = cpu_to_be64(0); 860 to->sb_pquotino = cpu_to_be64(0); 861 return; 862 } 863 864 to->sb_uquotino = cpu_to_be64(from->sb_uquotino); 865 866 /* 867 * The in-memory superblock quota state matches the v5 on-disk format so 868 * just write them out and return 869 */ 870 if (xfs_sb_is_v5(from)) { 871 to->sb_qflags = cpu_to_be16(from->sb_qflags); 872 to->sb_gquotino = cpu_to_be64(from->sb_gquotino); 873 to->sb_pquotino = cpu_to_be64(from->sb_pquotino); 874 return; 875 } 876 877 /* 878 * For older superblocks (v4), the in-core version of sb_qflags do not 879 * have XFS_OQUOTA_* flags, whereas the on-disk version does. So, 880 * convert incore XFS_{PG}QUOTA_* flags to on-disk XFS_OQUOTA_* flags. 881 */ 882 qflags &= ~(XFS_PQUOTA_ENFD | XFS_PQUOTA_CHKD | 883 XFS_GQUOTA_ENFD | XFS_GQUOTA_CHKD); 884 885 if (from->sb_qflags & 886 (XFS_PQUOTA_ENFD | XFS_GQUOTA_ENFD)) 887 qflags |= XFS_OQUOTA_ENFD; 888 if (from->sb_qflags & 889 (XFS_PQUOTA_CHKD | XFS_GQUOTA_CHKD)) 890 qflags |= XFS_OQUOTA_CHKD; 891 to->sb_qflags = cpu_to_be16(qflags); 892 893 /* 894 * GQUOTINO and PQUOTINO cannot be used together in versions 895 * of superblock that do not have pquotino. from->sb_flags 896 * tells us which quota is active and should be copied to 897 * disk. If neither are active, we should NULL the inode. 898 * 899 * In all cases, the separate pquotino must remain 0 because it 900 * is beyond the "end" of the valid non-pquotino superblock. 901 */ 902 if (from->sb_qflags & XFS_GQUOTA_ACCT) 903 to->sb_gquotino = cpu_to_be64(from->sb_gquotino); 904 else if (from->sb_qflags & XFS_PQUOTA_ACCT) 905 to->sb_gquotino = cpu_to_be64(from->sb_pquotino); 906 else { 907 /* 908 * We can't rely on just the fields being logged to tell us 909 * that it is safe to write NULLFSINO - we should only do that 910 * if quotas are not actually enabled. Hence only write 911 * NULLFSINO if both in-core quota inodes are NULL. 912 */ 913 if (from->sb_gquotino == NULLFSINO && 914 from->sb_pquotino == NULLFSINO) 915 to->sb_gquotino = cpu_to_be64(NULLFSINO); 916 } 917 918 to->sb_pquotino = 0; 919 } 920 921 void 922 xfs_sb_to_disk( 923 struct xfs_dsb *to, 924 struct xfs_sb *from) 925 { 926 xfs_sb_quota_to_disk(to, from); 927 928 to->sb_magicnum = cpu_to_be32(from->sb_magicnum); 929 to->sb_blocksize = cpu_to_be32(from->sb_blocksize); 930 to->sb_dblocks = cpu_to_be64(from->sb_dblocks); 931 to->sb_rblocks = cpu_to_be64(from->sb_rblocks); 932 to->sb_rextents = cpu_to_be64(from->sb_rextents); 933 memcpy(&to->sb_uuid, &from->sb_uuid, sizeof(to->sb_uuid)); 934 to->sb_logstart = cpu_to_be64(from->sb_logstart); 935 to->sb_rootino = cpu_to_be64(from->sb_rootino); 936 to->sb_rbmino = cpu_to_be64(from->sb_rbmino); 937 to->sb_rsumino = cpu_to_be64(from->sb_rsumino); 938 to->sb_rextsize = cpu_to_be32(from->sb_rextsize); 939 to->sb_agblocks = cpu_to_be32(from->sb_agblocks); 940 to->sb_agcount = cpu_to_be32(from->sb_agcount); 941 to->sb_rbmblocks = cpu_to_be32(from->sb_rbmblocks); 942 to->sb_logblocks = cpu_to_be32(from->sb_logblocks); 943 to->sb_versionnum = cpu_to_be16(from->sb_versionnum); 944 to->sb_sectsize = cpu_to_be16(from->sb_sectsize); 945 to->sb_inodesize = cpu_to_be16(from->sb_inodesize); 946 to->sb_inopblock = cpu_to_be16(from->sb_inopblock); 947 memcpy(&to->sb_fname, &from->sb_fname, sizeof(to->sb_fname)); 948 to->sb_blocklog = from->sb_blocklog; 949 to->sb_sectlog = from->sb_sectlog; 950 to->sb_inodelog = from->sb_inodelog; 951 to->sb_inopblog = from->sb_inopblog; 952 to->sb_agblklog = from->sb_agblklog; 953 to->sb_rextslog = from->sb_rextslog; 954 to->sb_inprogress = from->sb_inprogress; 955 to->sb_imax_pct = from->sb_imax_pct; 956 to->sb_icount = cpu_to_be64(from->sb_icount); 957 to->sb_ifree = cpu_to_be64(from->sb_ifree); 958 to->sb_fdblocks = cpu_to_be64(from->sb_fdblocks); 959 to->sb_frextents = cpu_to_be64(from->sb_frextents); 960 961 to->sb_flags = from->sb_flags; 962 to->sb_shared_vn = from->sb_shared_vn; 963 to->sb_inoalignmt = cpu_to_be32(from->sb_inoalignmt); 964 to->sb_unit = cpu_to_be32(from->sb_unit); 965 to->sb_width = cpu_to_be32(from->sb_width); 966 to->sb_dirblklog = from->sb_dirblklog; 967 to->sb_logsectlog = from->sb_logsectlog; 968 to->sb_logsectsize = cpu_to_be16(from->sb_logsectsize); 969 to->sb_logsunit = cpu_to_be32(from->sb_logsunit); 970 971 /* 972 * We need to ensure that bad_features2 always matches features2. 973 * Hence we enforce that here rather than having to remember to do it 974 * everywhere else that updates features2. 975 */ 976 from->sb_bad_features2 = from->sb_features2; 977 to->sb_features2 = cpu_to_be32(from->sb_features2); 978 to->sb_bad_features2 = cpu_to_be32(from->sb_bad_features2); 979 980 if (!xfs_sb_is_v5(from)) 981 return; 982 983 to->sb_features_compat = cpu_to_be32(from->sb_features_compat); 984 to->sb_features_ro_compat = 985 cpu_to_be32(from->sb_features_ro_compat); 986 to->sb_features_incompat = 987 cpu_to_be32(from->sb_features_incompat); 988 to->sb_features_log_incompat = 989 cpu_to_be32(from->sb_features_log_incompat); 990 to->sb_spino_align = cpu_to_be32(from->sb_spino_align); 991 to->sb_lsn = cpu_to_be64(from->sb_lsn); 992 if (from->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_META_UUID) 993 uuid_copy(&to->sb_meta_uuid, &from->sb_meta_uuid); 994 995 if (from->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_METADIR) { 996 to->sb_metadirino = cpu_to_be64(from->sb_metadirino); 997 to->sb_rgblklog = from->sb_rgblklog; 998 memset(to->sb_pad, 0, sizeof(to->sb_pad)); 999 to->sb_rgcount = cpu_to_be32(from->sb_rgcount); 1000 to->sb_rgextents = cpu_to_be32(from->sb_rgextents); 1001 to->sb_rbmino = cpu_to_be64(0); 1002 to->sb_rsumino = cpu_to_be64(0); 1003 } 1004 } 1005 1006 /* 1007 * If the superblock has the CRC feature bit set or the CRC field is non-null, 1008 * check that the CRC is valid. We check the CRC field is non-null because a 1009 * single bit error could clear the feature bit and unused parts of the 1010 * superblock are supposed to be zero. Hence a non-null crc field indicates that 1011 * we've potentially lost a feature bit and we should check it anyway. 1012 * 1013 * However, past bugs (i.e. in growfs) left non-zeroed regions beyond the 1014 * last field in V4 secondary superblocks. So for secondary superblocks, 1015 * we are more forgiving, and ignore CRC failures if the primary doesn't 1016 * indicate that the fs version is V5. 1017 */ 1018 static void 1019 xfs_sb_read_verify( 1020 struct xfs_buf *bp) 1021 { 1022 struct xfs_sb sb; 1023 struct xfs_mount *mp = bp->b_mount; 1024 struct xfs_dsb *dsb = bp->b_addr; 1025 int error; 1026 1027 /* 1028 * open code the version check to avoid needing to convert the entire 1029 * superblock from disk order just to check the version number 1030 */ 1031 if (dsb->sb_magicnum == cpu_to_be32(XFS_SB_MAGIC) && 1032 (((be16_to_cpu(dsb->sb_versionnum) & XFS_SB_VERSION_NUMBITS) == 1033 XFS_SB_VERSION_5) || 1034 dsb->sb_crc != 0)) { 1035 1036 if (!xfs_buf_verify_cksum(bp, XFS_SB_CRC_OFF)) { 1037 /* Only fail bad secondaries on a known V5 filesystem */ 1038 if (xfs_buf_daddr(bp) == XFS_SB_DADDR || 1039 xfs_has_crc(mp)) { 1040 error = -EFSBADCRC; 1041 goto out_error; 1042 } 1043 } 1044 } 1045 1046 /* 1047 * Check all the superblock fields. Don't byteswap the xquota flags 1048 * because _verify_common checks the on-disk values. 1049 */ 1050 __xfs_sb_from_disk(&sb, dsb, false); 1051 error = xfs_validate_sb_common(mp, bp, &sb); 1052 if (error) 1053 goto out_error; 1054 error = xfs_validate_sb_read(mp, &sb); 1055 1056 out_error: 1057 if (error == -EFSCORRUPTED || error == -EFSBADCRC) 1058 xfs_verifier_error(bp, error, __this_address); 1059 else if (error) 1060 xfs_buf_ioerror(bp, error); 1061 } 1062 1063 /* 1064 * We may be probed for a filesystem match, so we may not want to emit 1065 * messages when the superblock buffer is not actually an XFS superblock. 1066 * If we find an XFS superblock, then run a normal, noisy mount because we are 1067 * really going to mount it and want to know about errors. 1068 */ 1069 static void 1070 xfs_sb_quiet_read_verify( 1071 struct xfs_buf *bp) 1072 { 1073 struct xfs_dsb *dsb = bp->b_addr; 1074 1075 if (dsb->sb_magicnum == cpu_to_be32(XFS_SB_MAGIC)) { 1076 /* XFS filesystem, verify noisily! */ 1077 xfs_sb_read_verify(bp); 1078 return; 1079 } 1080 /* quietly fail */ 1081 xfs_buf_ioerror(bp, -EWRONGFS); 1082 } 1083 1084 static void 1085 xfs_sb_write_verify( 1086 struct xfs_buf *bp) 1087 { 1088 struct xfs_sb sb; 1089 struct xfs_mount *mp = bp->b_mount; 1090 struct xfs_buf_log_item *bip = bp->b_log_item; 1091 struct xfs_dsb *dsb = bp->b_addr; 1092 int error; 1093 1094 /* 1095 * Check all the superblock fields. Don't byteswap the xquota flags 1096 * because _verify_common checks the on-disk values. 1097 */ 1098 __xfs_sb_from_disk(&sb, dsb, false); 1099 error = xfs_validate_sb_common(mp, bp, &sb); 1100 if (error) 1101 goto out_error; 1102 error = xfs_validate_sb_write(mp, bp, &sb); 1103 if (error) 1104 goto out_error; 1105 1106 if (!xfs_sb_is_v5(&sb)) 1107 return; 1108 1109 if (bip) 1110 dsb->sb_lsn = cpu_to_be64(bip->bli_item.li_lsn); 1111 1112 xfs_buf_update_cksum(bp, XFS_SB_CRC_OFF); 1113 return; 1114 1115 out_error: 1116 xfs_verifier_error(bp, error, __this_address); 1117 } 1118 1119 const struct xfs_buf_ops xfs_sb_buf_ops = { 1120 .name = "xfs_sb", 1121 .magic = { cpu_to_be32(XFS_SB_MAGIC), cpu_to_be32(XFS_SB_MAGIC) }, 1122 .verify_read = xfs_sb_read_verify, 1123 .verify_write = xfs_sb_write_verify, 1124 }; 1125 1126 const struct xfs_buf_ops xfs_sb_quiet_buf_ops = { 1127 .name = "xfs_sb_quiet", 1128 .magic = { cpu_to_be32(XFS_SB_MAGIC), cpu_to_be32(XFS_SB_MAGIC) }, 1129 .verify_read = xfs_sb_quiet_read_verify, 1130 .verify_write = xfs_sb_write_verify, 1131 }; 1132 1133 /* Compute cached rt geometry from the incore sb. */ 1134 void 1135 xfs_sb_mount_rextsize( 1136 struct xfs_mount *mp, 1137 struct xfs_sb *sbp) 1138 { 1139 struct xfs_groups *rgs = &mp->m_groups[XG_TYPE_RTG]; 1140 1141 mp->m_rtxblklog = log2_if_power2(sbp->sb_rextsize); 1142 mp->m_rtxblkmask = mask64_if_power2(sbp->sb_rextsize); 1143 1144 if (xfs_sb_is_v5(sbp) && 1145 (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_METADIR)) { 1146 rgs->blocks = sbp->sb_rgextents * sbp->sb_rextsize; 1147 rgs->blklog = mp->m_sb.sb_rgblklog; 1148 rgs->blkmask = xfs_mask32lo(mp->m_sb.sb_rgblklog); 1149 } else { 1150 rgs->blocks = 0; 1151 rgs->blklog = 0; 1152 rgs->blkmask = (uint64_t)-1; 1153 } 1154 } 1155 1156 /* Update incore sb rt extent size, then recompute the cached rt geometry. */ 1157 void 1158 xfs_mount_sb_set_rextsize( 1159 struct xfs_mount *mp, 1160 struct xfs_sb *sbp, 1161 xfs_agblock_t rextsize) 1162 { 1163 sbp->sb_rextsize = rextsize; 1164 if (xfs_sb_is_v5(sbp) && 1165 (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_METADIR)) 1166 sbp->sb_rgblklog = xfs_compute_rgblklog(sbp->sb_rgextents, 1167 rextsize); 1168 1169 xfs_sb_mount_rextsize(mp, sbp); 1170 } 1171 1172 /* 1173 * xfs_mount_common 1174 * 1175 * Mount initialization code establishing various mount 1176 * fields from the superblock associated with the given 1177 * mount structure. 1178 * 1179 * Inode geometry are calculated in xfs_ialloc_setup_geometry. 1180 */ 1181 void 1182 xfs_sb_mount_common( 1183 struct xfs_mount *mp, 1184 struct xfs_sb *sbp) 1185 { 1186 struct xfs_groups *ags = &mp->m_groups[XG_TYPE_AG]; 1187 1188 mp->m_agfrotor = 0; 1189 atomic_set(&mp->m_agirotor, 0); 1190 mp->m_maxagi = mp->m_sb.sb_agcount; 1191 mp->m_blkbit_log = sbp->sb_blocklog + XFS_NBBYLOG; 1192 mp->m_blkbb_log = sbp->sb_blocklog - BBSHIFT; 1193 mp->m_sectbb_log = sbp->sb_sectlog - BBSHIFT; 1194 mp->m_agno_log = xfs_highbit32(sbp->sb_agcount - 1) + 1; 1195 mp->m_blockmask = sbp->sb_blocksize - 1; 1196 mp->m_blockwsize = xfs_rtbmblock_size(sbp) >> XFS_WORDLOG; 1197 mp->m_rtx_per_rbmblock = mp->m_blockwsize << XFS_NBWORDLOG; 1198 1199 ags->blocks = mp->m_sb.sb_agblocks; 1200 ags->blklog = mp->m_sb.sb_agblklog; 1201 ags->blkmask = xfs_mask32lo(mp->m_sb.sb_agblklog); 1202 1203 xfs_sb_mount_rextsize(mp, sbp); 1204 1205 mp->m_alloc_mxr[0] = xfs_allocbt_maxrecs(mp, sbp->sb_blocksize, true); 1206 mp->m_alloc_mxr[1] = xfs_allocbt_maxrecs(mp, sbp->sb_blocksize, false); 1207 mp->m_alloc_mnr[0] = mp->m_alloc_mxr[0] / 2; 1208 mp->m_alloc_mnr[1] = mp->m_alloc_mxr[1] / 2; 1209 1210 mp->m_bmap_dmxr[0] = xfs_bmbt_maxrecs(mp, sbp->sb_blocksize, true); 1211 mp->m_bmap_dmxr[1] = xfs_bmbt_maxrecs(mp, sbp->sb_blocksize, false); 1212 mp->m_bmap_dmnr[0] = mp->m_bmap_dmxr[0] / 2; 1213 mp->m_bmap_dmnr[1] = mp->m_bmap_dmxr[1] / 2; 1214 1215 mp->m_rmap_mxr[0] = xfs_rmapbt_maxrecs(mp, sbp->sb_blocksize, true); 1216 mp->m_rmap_mxr[1] = xfs_rmapbt_maxrecs(mp, sbp->sb_blocksize, false); 1217 mp->m_rmap_mnr[0] = mp->m_rmap_mxr[0] / 2; 1218 mp->m_rmap_mnr[1] = mp->m_rmap_mxr[1] / 2; 1219 1220 mp->m_rtrmap_mxr[0] = xfs_rtrmapbt_maxrecs(mp, sbp->sb_blocksize, true); 1221 mp->m_rtrmap_mxr[1] = xfs_rtrmapbt_maxrecs(mp, sbp->sb_blocksize, false); 1222 mp->m_rtrmap_mnr[0] = mp->m_rtrmap_mxr[0] / 2; 1223 mp->m_rtrmap_mnr[1] = mp->m_rtrmap_mxr[1] / 2; 1224 1225 mp->m_refc_mxr[0] = xfs_refcountbt_maxrecs(mp, sbp->sb_blocksize, true); 1226 mp->m_refc_mxr[1] = xfs_refcountbt_maxrecs(mp, sbp->sb_blocksize, false); 1227 mp->m_refc_mnr[0] = mp->m_refc_mxr[0] / 2; 1228 mp->m_refc_mnr[1] = mp->m_refc_mxr[1] / 2; 1229 1230 mp->m_rtrefc_mxr[0] = xfs_rtrefcountbt_maxrecs(mp, sbp->sb_blocksize, 1231 true); 1232 mp->m_rtrefc_mxr[1] = xfs_rtrefcountbt_maxrecs(mp, sbp->sb_blocksize, 1233 false); 1234 mp->m_rtrefc_mnr[0] = mp->m_rtrefc_mxr[0] / 2; 1235 mp->m_rtrefc_mnr[1] = mp->m_rtrefc_mxr[1] / 2; 1236 1237 mp->m_bsize = XFS_FSB_TO_BB(mp, 1); 1238 mp->m_alloc_set_aside = xfs_alloc_set_aside(mp); 1239 mp->m_ag_max_usable = xfs_alloc_ag_max_usable(mp); 1240 } 1241 1242 /* 1243 * xfs_log_sb() can be used to copy arbitrary changes to the in-core superblock 1244 * into the superblock buffer to be logged. It does not provide the higher 1245 * level of locking that is needed to protect the in-core superblock from 1246 * concurrent access. 1247 */ 1248 void 1249 xfs_log_sb( 1250 struct xfs_trans *tp) 1251 { 1252 struct xfs_mount *mp = tp->t_mountp; 1253 struct xfs_buf *bp = xfs_trans_getsb(tp); 1254 1255 /* 1256 * Lazy sb counters don't update the in-core superblock so do that now. 1257 * If this is at unmount, the counters will be exactly correct, but at 1258 * any other time they will only be ballpark correct because of 1259 * reservations that have been taken out percpu counters. If we have an 1260 * unclean shutdown, this will be corrected by log recovery rebuilding 1261 * the counters from the AGF block counts. 1262 */ 1263 if (xfs_has_lazysbcount(mp)) { 1264 mp->m_sb.sb_icount = percpu_counter_sum_positive(&mp->m_icount); 1265 mp->m_sb.sb_ifree = min_t(uint64_t, 1266 percpu_counter_sum_positive(&mp->m_ifree), 1267 mp->m_sb.sb_icount); 1268 mp->m_sb.sb_fdblocks = 1269 percpu_counter_sum_positive(&mp->m_fdblocks); 1270 } 1271 1272 /* 1273 * sb_frextents was added to the lazy sb counters when the rt groups 1274 * feature was introduced. This counter can go negative due to the way 1275 * we handle nearly-lockless reservations, so we must use the _positive 1276 * variant here to avoid writing out nonsense frextents. 1277 */ 1278 if (xfs_has_rtgroups(mp)) 1279 mp->m_sb.sb_frextents = 1280 percpu_counter_sum_positive(&mp->m_frextents); 1281 1282 xfs_sb_to_disk(bp->b_addr, &mp->m_sb); 1283 xfs_trans_buf_set_type(tp, bp, XFS_BLFT_SB_BUF); 1284 xfs_trans_log_buf(tp, bp, 0, sizeof(struct xfs_dsb) - 1); 1285 } 1286 1287 /* 1288 * xfs_sync_sb 1289 * 1290 * Sync the superblock to disk. 1291 * 1292 * Note that the caller is responsible for checking the frozen state of the 1293 * filesystem. This procedure uses the non-blocking transaction allocator and 1294 * thus will allow modifications to a frozen fs. This is required because this 1295 * code can be called during the process of freezing where use of the high-level 1296 * allocator would deadlock. 1297 */ 1298 int 1299 xfs_sync_sb( 1300 struct xfs_mount *mp, 1301 bool wait) 1302 { 1303 struct xfs_trans *tp; 1304 int error; 1305 1306 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_sb, 0, 0, 1307 XFS_TRANS_NO_WRITECOUNT, &tp); 1308 if (error) 1309 return error; 1310 1311 xfs_log_sb(tp); 1312 if (wait) 1313 xfs_trans_set_sync(tp); 1314 return xfs_trans_commit(tp); 1315 } 1316 1317 /* 1318 * Update all the secondary superblocks to match the new state of the primary. 1319 * Because we are completely overwriting all the existing fields in the 1320 * secondary superblock buffers, there is no need to read them in from disk. 1321 * Just get a new buffer, stamp it and write it. 1322 * 1323 * The sb buffers need to be cached here so that we serialise against other 1324 * operations that access the secondary superblocks, but we don't want to keep 1325 * them in memory once it is written so we mark it as a one-shot buffer. 1326 */ 1327 int 1328 xfs_update_secondary_sbs( 1329 struct xfs_mount *mp) 1330 { 1331 struct xfs_perag *pag = NULL; 1332 int saved_error = 0; 1333 int error = 0; 1334 LIST_HEAD (buffer_list); 1335 1336 /* update secondary superblocks. */ 1337 while ((pag = xfs_perag_next_from(mp, pag, 1))) { 1338 struct xfs_buf *bp; 1339 1340 error = xfs_buf_get(mp->m_ddev_targp, 1341 XFS_AG_DADDR(mp, pag_agno(pag), XFS_SB_DADDR), 1342 XFS_FSS_TO_BB(mp, 1), &bp); 1343 /* 1344 * If we get an error reading or writing alternate superblocks, 1345 * continue. xfs_repair chooses the "best" superblock based 1346 * on most matches; if we break early, we'll leave more 1347 * superblocks un-updated than updated, and xfs_repair may 1348 * pick them over the properly-updated primary. 1349 */ 1350 if (error) { 1351 xfs_warn(mp, 1352 "error allocating secondary superblock for ag %d", 1353 pag_agno(pag)); 1354 if (!saved_error) 1355 saved_error = error; 1356 continue; 1357 } 1358 1359 bp->b_ops = &xfs_sb_buf_ops; 1360 xfs_buf_oneshot(bp); 1361 xfs_buf_zero(bp, 0, BBTOB(bp->b_length)); 1362 xfs_sb_to_disk(bp->b_addr, &mp->m_sb); 1363 xfs_buf_delwri_queue(bp, &buffer_list); 1364 xfs_buf_relse(bp); 1365 1366 /* don't hold too many buffers at once */ 1367 if (pag_agno(pag) % 16) 1368 continue; 1369 1370 error = xfs_buf_delwri_submit(&buffer_list); 1371 if (error) { 1372 xfs_warn(mp, 1373 "write error %d updating a secondary superblock near ag %d", 1374 error, pag_agno(pag)); 1375 if (!saved_error) 1376 saved_error = error; 1377 continue; 1378 } 1379 } 1380 error = xfs_buf_delwri_submit(&buffer_list); 1381 if (error) 1382 xfs_warn(mp, "error %d writing secondary superblocks", error); 1383 return saved_error ? saved_error : error; 1384 } 1385 1386 /* 1387 * Same behavior as xfs_sync_sb, except that it is always synchronous and it 1388 * also writes the superblock buffer to disk sector 0 immediately. 1389 */ 1390 int 1391 xfs_sync_sb_buf( 1392 struct xfs_mount *mp, 1393 bool update_rtsb) 1394 { 1395 struct xfs_trans *tp; 1396 struct xfs_buf *bp; 1397 struct xfs_buf *rtsb_bp = NULL; 1398 int error; 1399 1400 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_sb, 0, 0, 0, &tp); 1401 if (error) 1402 return error; 1403 1404 bp = xfs_trans_getsb(tp); 1405 xfs_log_sb(tp); 1406 xfs_trans_bhold(tp, bp); 1407 if (update_rtsb) { 1408 rtsb_bp = xfs_log_rtsb(tp, bp); 1409 if (rtsb_bp) 1410 xfs_trans_bhold(tp, rtsb_bp); 1411 } 1412 xfs_trans_set_sync(tp); 1413 error = xfs_trans_commit(tp); 1414 if (error) 1415 goto out; 1416 /* 1417 * write out the sb buffer to get the changes to disk 1418 */ 1419 error = xfs_bwrite(bp); 1420 if (!error && rtsb_bp) 1421 error = xfs_bwrite(rtsb_bp); 1422 out: 1423 if (rtsb_bp) 1424 xfs_buf_relse(rtsb_bp); 1425 xfs_buf_relse(bp); 1426 return error; 1427 } 1428 1429 void 1430 xfs_fs_geometry( 1431 struct xfs_mount *mp, 1432 struct xfs_fsop_geom *geo, 1433 int struct_version) 1434 { 1435 struct xfs_sb *sbp = &mp->m_sb; 1436 1437 memset(geo, 0, sizeof(struct xfs_fsop_geom)); 1438 1439 geo->blocksize = sbp->sb_blocksize; 1440 geo->rtextsize = sbp->sb_rextsize; 1441 geo->agblocks = sbp->sb_agblocks; 1442 geo->agcount = sbp->sb_agcount; 1443 geo->logblocks = sbp->sb_logblocks; 1444 geo->sectsize = sbp->sb_sectsize; 1445 geo->inodesize = sbp->sb_inodesize; 1446 geo->imaxpct = sbp->sb_imax_pct; 1447 geo->datablocks = sbp->sb_dblocks; 1448 geo->rtblocks = sbp->sb_rblocks; 1449 geo->rtextents = sbp->sb_rextents; 1450 geo->logstart = sbp->sb_logstart; 1451 BUILD_BUG_ON(sizeof(geo->uuid) != sizeof(sbp->sb_uuid)); 1452 memcpy(geo->uuid, &sbp->sb_uuid, sizeof(sbp->sb_uuid)); 1453 1454 if (struct_version < 2) 1455 return; 1456 1457 geo->sunit = sbp->sb_unit; 1458 geo->swidth = sbp->sb_width; 1459 1460 if (struct_version < 3) 1461 return; 1462 1463 geo->version = XFS_FSOP_GEOM_VERSION; 1464 geo->flags = XFS_FSOP_GEOM_FLAGS_NLINK | 1465 XFS_FSOP_GEOM_FLAGS_DIRV2 | 1466 XFS_FSOP_GEOM_FLAGS_EXTFLG; 1467 if (xfs_has_attr(mp)) 1468 geo->flags |= XFS_FSOP_GEOM_FLAGS_ATTR; 1469 if (xfs_has_quota(mp)) 1470 geo->flags |= XFS_FSOP_GEOM_FLAGS_QUOTA; 1471 if (xfs_has_align(mp)) 1472 geo->flags |= XFS_FSOP_GEOM_FLAGS_IALIGN; 1473 if (xfs_has_dalign(mp)) 1474 geo->flags |= XFS_FSOP_GEOM_FLAGS_DALIGN; 1475 if (xfs_has_asciici(mp)) 1476 geo->flags |= XFS_FSOP_GEOM_FLAGS_DIRV2CI; 1477 if (xfs_has_lazysbcount(mp)) 1478 geo->flags |= XFS_FSOP_GEOM_FLAGS_LAZYSB; 1479 if (xfs_has_attr2(mp)) 1480 geo->flags |= XFS_FSOP_GEOM_FLAGS_ATTR2; 1481 if (xfs_has_projid32(mp)) 1482 geo->flags |= XFS_FSOP_GEOM_FLAGS_PROJID32; 1483 if (xfs_has_crc(mp)) 1484 geo->flags |= XFS_FSOP_GEOM_FLAGS_V5SB; 1485 if (xfs_has_ftype(mp)) 1486 geo->flags |= XFS_FSOP_GEOM_FLAGS_FTYPE; 1487 if (xfs_has_finobt(mp)) 1488 geo->flags |= XFS_FSOP_GEOM_FLAGS_FINOBT; 1489 if (xfs_has_sparseinodes(mp)) 1490 geo->flags |= XFS_FSOP_GEOM_FLAGS_SPINODES; 1491 if (xfs_has_rmapbt(mp)) 1492 geo->flags |= XFS_FSOP_GEOM_FLAGS_RMAPBT; 1493 if (xfs_has_reflink(mp)) 1494 geo->flags |= XFS_FSOP_GEOM_FLAGS_REFLINK; 1495 if (xfs_has_bigtime(mp)) 1496 geo->flags |= XFS_FSOP_GEOM_FLAGS_BIGTIME; 1497 if (xfs_has_inobtcounts(mp)) 1498 geo->flags |= XFS_FSOP_GEOM_FLAGS_INOBTCNT; 1499 if (xfs_has_parent(mp)) 1500 geo->flags |= XFS_FSOP_GEOM_FLAGS_PARENT; 1501 if (xfs_has_sector(mp)) { 1502 geo->flags |= XFS_FSOP_GEOM_FLAGS_SECTOR; 1503 geo->logsectsize = sbp->sb_logsectsize; 1504 } else { 1505 geo->logsectsize = BBSIZE; 1506 } 1507 if (xfs_has_large_extent_counts(mp)) 1508 geo->flags |= XFS_FSOP_GEOM_FLAGS_NREXT64; 1509 if (xfs_has_exchange_range(mp)) 1510 geo->flags |= XFS_FSOP_GEOM_FLAGS_EXCHANGE_RANGE; 1511 if (xfs_has_metadir(mp)) 1512 geo->flags |= XFS_FSOP_GEOM_FLAGS_METADIR; 1513 geo->rtsectsize = sbp->sb_blocksize; 1514 geo->dirblocksize = xfs_dir2_dirblock_bytes(sbp); 1515 1516 if (struct_version < 4) 1517 return; 1518 1519 if (xfs_has_logv2(mp)) 1520 geo->flags |= XFS_FSOP_GEOM_FLAGS_LOGV2; 1521 1522 geo->logsunit = sbp->sb_logsunit; 1523 1524 if (struct_version < 5) 1525 return; 1526 1527 geo->version = XFS_FSOP_GEOM_VERSION_V5; 1528 1529 if (xfs_has_rtgroups(mp)) { 1530 geo->rgcount = sbp->sb_rgcount; 1531 geo->rgextents = sbp->sb_rgextents; 1532 } 1533 } 1534 1535 /* Read a secondary superblock. */ 1536 int 1537 xfs_sb_read_secondary( 1538 struct xfs_mount *mp, 1539 struct xfs_trans *tp, 1540 xfs_agnumber_t agno, 1541 struct xfs_buf **bpp) 1542 { 1543 struct xfs_buf *bp; 1544 int error; 1545 1546 ASSERT(agno != 0 && agno != NULLAGNUMBER); 1547 error = xfs_trans_read_buf(mp, tp, mp->m_ddev_targp, 1548 XFS_AG_DADDR(mp, agno, XFS_SB_BLOCK(mp)), 1549 XFS_FSS_TO_BB(mp, 1), 0, &bp, &xfs_sb_buf_ops); 1550 if (xfs_metadata_is_sick(error)) 1551 xfs_agno_mark_sick(mp, agno, XFS_SICK_AG_SB); 1552 if (error) 1553 return error; 1554 xfs_buf_set_ref(bp, XFS_SSB_REF); 1555 *bpp = bp; 1556 return 0; 1557 } 1558 1559 /* Get an uninitialised secondary superblock buffer. */ 1560 int 1561 xfs_sb_get_secondary( 1562 struct xfs_mount *mp, 1563 struct xfs_trans *tp, 1564 xfs_agnumber_t agno, 1565 struct xfs_buf **bpp) 1566 { 1567 struct xfs_buf *bp; 1568 int error; 1569 1570 ASSERT(agno != 0 && agno != NULLAGNUMBER); 1571 error = xfs_trans_get_buf(tp, mp->m_ddev_targp, 1572 XFS_AG_DADDR(mp, agno, XFS_SB_BLOCK(mp)), 1573 XFS_FSS_TO_BB(mp, 1), 0, &bp); 1574 if (error) 1575 return error; 1576 bp->b_ops = &xfs_sb_buf_ops; 1577 xfs_buf_oneshot(bp); 1578 *bpp = bp; 1579 return 0; 1580 } 1581 1582 /* 1583 * sunit, swidth, sectorsize(optional with 0) should be all in bytes, so users 1584 * won't be confused by values in error messages. This function returns false 1585 * if the stripe geometry is invalid and the caller is unable to repair the 1586 * stripe configuration later in the mount process. 1587 */ 1588 bool 1589 xfs_validate_stripe_geometry( 1590 struct xfs_mount *mp, 1591 __s64 sunit, 1592 __s64 swidth, 1593 int sectorsize, 1594 bool may_repair, 1595 bool silent) 1596 { 1597 if (swidth > INT_MAX) { 1598 if (!silent) 1599 xfs_notice(mp, 1600 "stripe width (%lld) is too large", swidth); 1601 goto check_override; 1602 } 1603 1604 if (sunit > swidth) { 1605 if (!silent) 1606 xfs_notice(mp, 1607 "stripe unit (%lld) is larger than the stripe width (%lld)", sunit, swidth); 1608 goto check_override; 1609 } 1610 1611 if (sectorsize && (int)sunit % sectorsize) { 1612 if (!silent) 1613 xfs_notice(mp, 1614 "stripe unit (%lld) must be a multiple of the sector size (%d)", 1615 sunit, sectorsize); 1616 goto check_override; 1617 } 1618 1619 if (sunit && !swidth) { 1620 if (!silent) 1621 xfs_notice(mp, 1622 "invalid stripe unit (%lld) and stripe width of 0", sunit); 1623 goto check_override; 1624 } 1625 1626 if (!sunit && swidth) { 1627 if (!silent) 1628 xfs_notice(mp, 1629 "invalid stripe width (%lld) and stripe unit of 0", swidth); 1630 goto check_override; 1631 } 1632 1633 if (sunit && (int)swidth % (int)sunit) { 1634 if (!silent) 1635 xfs_notice(mp, 1636 "stripe width (%lld) must be a multiple of the stripe unit (%lld)", 1637 swidth, sunit); 1638 goto check_override; 1639 } 1640 return true; 1641 1642 check_override: 1643 if (!may_repair) 1644 return false; 1645 /* 1646 * During mount, mp->m_dalign will not be set unless the sunit mount 1647 * option was set. If it was set, ignore the bad stripe alignment values 1648 * and allow the validation and overwrite later in the mount process to 1649 * attempt to overwrite the bad stripe alignment values with the values 1650 * supplied by mount options. 1651 */ 1652 if (!mp->m_dalign) 1653 return false; 1654 if (!silent) 1655 xfs_notice(mp, 1656 "Will try to correct with specified mount options sunit (%d) and swidth (%d)", 1657 BBTOB(mp->m_dalign), BBTOB(mp->m_swidth)); 1658 return true; 1659 } 1660 1661 /* 1662 * Compute the maximum level number of the realtime summary file, as defined by 1663 * mkfs. The historic use of highbit32 on a 64-bit quantity prohibited correct 1664 * use of rt volumes with more than 2^32 extents. 1665 */ 1666 uint8_t 1667 xfs_compute_rextslog( 1668 xfs_rtbxlen_t rtextents) 1669 { 1670 if (!rtextents) 1671 return 0; 1672 return xfs_highbit64(rtextents); 1673 } 1674