1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright (c) 2000-2005 Silicon Graphics, Inc. 4 * All Rights Reserved. 5 */ 6 #include "xfs_platform.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_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_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 if (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_ZONED) 187 features |= XFS_FEAT_ZONED; 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 if (xfs_sb_is_v5(sbp) && 270 (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_ZONED)) 271 return 0; 272 return howmany_64(xfs_extents_per_rbm(sbp), 273 NBBY * xfs_rtbmblock_size(sbp)); 274 } 275 276 /* Validate the realtime geometry */ 277 bool 278 xfs_validate_rt_geometry( 279 struct xfs_sb *sbp) 280 { 281 if (xfs_sb_is_v5(sbp) && 282 (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_ZONED)) { 283 if (sbp->sb_rextsize != 1) 284 return false; 285 } else { 286 if (sbp->sb_rextsize * sbp->sb_blocksize > XFS_MAX_RTEXTSIZE || 287 sbp->sb_rextsize * sbp->sb_blocksize < XFS_MIN_RTEXTSIZE) 288 return false; 289 } 290 291 if (sbp->sb_rblocks == 0) { 292 if (sbp->sb_rextents != 0 || sbp->sb_rbmblocks != 0 || 293 sbp->sb_rextslog != 0 || sbp->sb_frextents != 0) 294 return false; 295 return true; 296 } 297 298 if (sbp->sb_rextents == 0 || 299 sbp->sb_rextents != div_u64(sbp->sb_rblocks, sbp->sb_rextsize) || 300 sbp->sb_rextslog != xfs_compute_rextslog(sbp->sb_rextents) || 301 sbp->sb_rbmblocks != xfs_expected_rbmblocks(sbp)) 302 return false; 303 304 if (xfs_sb_is_v5(sbp) && 305 (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_ZONED)) { 306 uint32_t mod; 307 308 /* 309 * Zoned RT devices must be aligned to the RT group size, 310 * because garbage collection assumes that all zones have the 311 * same size to avoid insane complexity if that weren't the 312 * case. 313 */ 314 div_u64_rem(sbp->sb_rextents, sbp->sb_rgextents, &mod); 315 if (mod) 316 return false; 317 } 318 319 return true; 320 } 321 322 /* Check all the superblock fields we care about when writing one out. */ 323 STATIC int 324 xfs_validate_sb_write( 325 struct xfs_mount *mp, 326 struct xfs_buf *bp, 327 struct xfs_sb *sbp) 328 { 329 /* 330 * Carry out additional sb summary counter sanity checks when we write 331 * the superblock. We skip this in the read validator because there 332 * could be newer superblocks in the log and if the values are garbage 333 * even after replay we'll recalculate them at the end of log mount. 334 * 335 * mkfs has traditionally written zeroed counters to inprogress and 336 * secondary superblocks, so allow this usage to continue because 337 * we never read counters from such superblocks. 338 */ 339 if (xfs_buf_daddr(bp) == XFS_SB_DADDR && !sbp->sb_inprogress && 340 (sbp->sb_fdblocks > sbp->sb_dblocks || 341 !xfs_verify_icount(mp, sbp->sb_icount) || 342 sbp->sb_ifree > sbp->sb_icount)) { 343 xfs_warn(mp, "SB summary counter sanity check failed"); 344 return -EFSCORRUPTED; 345 } 346 347 if (!xfs_sb_is_v5(sbp)) 348 return 0; 349 350 /* 351 * Version 5 superblock feature mask validation. Reject combinations 352 * the kernel cannot support since we checked for unsupported bits in 353 * the read verifier, which means that memory is corrupt. 354 */ 355 if (!xfs_is_readonly(mp) && 356 xfs_sb_has_ro_compat_feature(sbp, XFS_SB_FEAT_RO_COMPAT_UNKNOWN)) { 357 xfs_alert(mp, 358 "Corruption detected in superblock read-only compatible features (0x%x)!", 359 (sbp->sb_features_ro_compat & 360 XFS_SB_FEAT_RO_COMPAT_UNKNOWN)); 361 return -EFSCORRUPTED; 362 } 363 if (xfs_sb_has_incompat_feature(sbp, XFS_SB_FEAT_INCOMPAT_UNKNOWN)) { 364 xfs_warn(mp, 365 "Corruption detected in superblock incompatible features (0x%x)!", 366 (sbp->sb_features_incompat & 367 XFS_SB_FEAT_INCOMPAT_UNKNOWN)); 368 return -EFSCORRUPTED; 369 } 370 if (xfs_sb_has_incompat_log_feature(sbp, 371 XFS_SB_FEAT_INCOMPAT_LOG_UNKNOWN)) { 372 xfs_warn(mp, 373 "Corruption detected in superblock incompatible log features (0x%x)!", 374 (sbp->sb_features_log_incompat & 375 XFS_SB_FEAT_INCOMPAT_LOG_UNKNOWN)); 376 return -EFSCORRUPTED; 377 } 378 379 /* 380 * We can't read verify the sb LSN because the read verifier is called 381 * before the log is allocated and processed. We know the log is set up 382 * before write verifier calls, so check it here. 383 */ 384 if (!xfs_log_check_lsn(mp, sbp->sb_lsn)) 385 return -EFSCORRUPTED; 386 387 return 0; 388 } 389 390 int 391 xfs_compute_rgblklog( 392 xfs_rtxlen_t rgextents, 393 xfs_rgblock_t rextsize) 394 { 395 uint64_t rgblocks = (uint64_t)rgextents * rextsize; 396 397 return xfs_highbit64(rgblocks - 1) + 1; 398 } 399 400 static int 401 xfs_validate_sb_rtgroups( 402 struct xfs_mount *mp, 403 struct xfs_sb *sbp) 404 { 405 uint64_t groups; 406 int rgblklog; 407 408 if (sbp->sb_rextsize == 0) { 409 xfs_warn(mp, 410 "Realtime extent size must not be zero."); 411 return -EINVAL; 412 } 413 414 if (sbp->sb_rgextents > XFS_MAX_RGBLOCKS / sbp->sb_rextsize) { 415 xfs_warn(mp, 416 "Realtime group size (%u) must be less than %u rt extents.", 417 sbp->sb_rgextents, 418 XFS_MAX_RGBLOCKS / sbp->sb_rextsize); 419 return -EINVAL; 420 } 421 422 if (sbp->sb_rgextents < XFS_MIN_RGEXTENTS) { 423 xfs_warn(mp, 424 "Realtime group size (%u) must be at least %u rt extents.", 425 sbp->sb_rgextents, XFS_MIN_RGEXTENTS); 426 return -EINVAL; 427 } 428 429 if (sbp->sb_rgcount > XFS_MAX_RGNUMBER) { 430 xfs_warn(mp, 431 "Realtime groups (%u) must be less than %u.", 432 sbp->sb_rgcount, XFS_MAX_RGNUMBER); 433 return -EINVAL; 434 } 435 436 groups = howmany_64(sbp->sb_rextents, sbp->sb_rgextents); 437 if (groups != sbp->sb_rgcount) { 438 xfs_warn(mp, 439 "Realtime groups (%u) do not cover the entire rt section; need (%llu) groups.", 440 sbp->sb_rgcount, groups); 441 return -EINVAL; 442 } 443 444 /* Exchange-range is required for fsr to work on realtime files */ 445 if (!(sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_EXCHRANGE)) { 446 xfs_warn(mp, 447 "Realtime groups feature requires exchange-range support."); 448 return -EINVAL; 449 } 450 451 rgblklog = xfs_compute_rgblklog(sbp->sb_rgextents, sbp->sb_rextsize); 452 if (sbp->sb_rgblklog != rgblklog) { 453 xfs_warn(mp, 454 "Realtime group log (%d) does not match expected value (%d).", 455 sbp->sb_rgblklog, rgblklog); 456 return -EINVAL; 457 } 458 459 return 0; 460 } 461 462 static int 463 xfs_validate_sb_zoned( 464 struct xfs_mount *mp, 465 struct xfs_sb *sbp) 466 { 467 if (sbp->sb_frextents != 0) { 468 xfs_warn(mp, 469 "sb_frextents must be zero for zoned file systems."); 470 return -EINVAL; 471 } 472 473 if (sbp->sb_rtstart && sbp->sb_rtstart < sbp->sb_dblocks) { 474 xfs_warn(mp, 475 "sb_rtstart (%lld) overlaps sb_dblocks (%lld).", 476 sbp->sb_rtstart, sbp->sb_dblocks); 477 return -EINVAL; 478 } 479 480 if (sbp->sb_rtreserved && sbp->sb_rtreserved >= sbp->sb_rblocks) { 481 xfs_warn(mp, 482 "sb_rtreserved (%lld) larger than sb_rblocks (%lld).", 483 sbp->sb_rtreserved, sbp->sb_rblocks); 484 return -EINVAL; 485 } 486 487 return 0; 488 } 489 490 /* Check the validity of the SB. */ 491 STATIC int 492 xfs_validate_sb_common( 493 struct xfs_mount *mp, 494 struct xfs_buf *bp, 495 struct xfs_sb *sbp) 496 { 497 struct xfs_dsb *dsb = bp->b_addr; 498 uint32_t agcount = 0; 499 uint32_t rem; 500 bool has_dalign; 501 int error; 502 503 if (!xfs_verify_magic(bp, dsb->sb_magicnum)) { 504 xfs_warn(mp, 505 "Superblock has bad magic number 0x%x. Not an XFS filesystem?", 506 be32_to_cpu(dsb->sb_magicnum)); 507 return -EWRONGFS; 508 } 509 510 if (!xfs_sb_good_version(sbp)) { 511 xfs_warn(mp, 512 "Superblock has unknown features enabled or corrupted feature masks."); 513 return -EWRONGFS; 514 } 515 516 /* 517 * Validate feature flags and state 518 */ 519 if (xfs_sb_is_v5(sbp)) { 520 if (sbp->sb_blocksize < XFS_MIN_CRC_BLOCKSIZE) { 521 xfs_notice(mp, 522 "Block size (%u bytes) too small for Version 5 superblock (minimum %d bytes)", 523 sbp->sb_blocksize, XFS_MIN_CRC_BLOCKSIZE); 524 return -EFSCORRUPTED; 525 } 526 527 /* V5 has a separate project quota inode */ 528 if (sbp->sb_qflags & (XFS_OQUOTA_ENFD | XFS_OQUOTA_CHKD)) { 529 xfs_notice(mp, 530 "Version 5 of Super block has XFS_OQUOTA bits."); 531 return -EFSCORRUPTED; 532 } 533 534 /* 535 * Full inode chunks must be aligned to inode chunk size when 536 * sparse inodes are enabled to support the sparse chunk 537 * allocation algorithm and prevent overlapping inode records. 538 */ 539 if (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_SPINODES) { 540 uint32_t align; 541 542 align = XFS_INODES_PER_CHUNK * sbp->sb_inodesize 543 >> sbp->sb_blocklog; 544 if (sbp->sb_inoalignmt != align) { 545 xfs_warn(mp, 546 "Inode block alignment (%u) must match chunk size (%u) for sparse inodes.", 547 sbp->sb_inoalignmt, align); 548 return -EINVAL; 549 } 550 551 if (sbp->sb_spino_align && 552 (sbp->sb_spino_align > sbp->sb_inoalignmt || 553 (sbp->sb_inoalignmt % sbp->sb_spino_align) != 0)) { 554 xfs_warn(mp, 555 "Sparse inode alignment (%u) is invalid, must be integer factor of (%u).", 556 sbp->sb_spino_align, 557 sbp->sb_inoalignmt); 558 return -EINVAL; 559 } 560 } else if (sbp->sb_spino_align) { 561 xfs_warn(mp, 562 "Sparse inode alignment (%u) should be zero.", 563 sbp->sb_spino_align); 564 return -EINVAL; 565 } 566 567 if (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_METADIR) { 568 if (memchr_inv(sbp->sb_pad, 0, sizeof(sbp->sb_pad))) { 569 xfs_warn(mp, 570 "Metadir superblock padding fields must be zero."); 571 return -EINVAL; 572 } 573 574 error = xfs_validate_sb_rtgroups(mp, sbp); 575 if (error) 576 return error; 577 } 578 if (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_ZONED) { 579 error = xfs_validate_sb_zoned(mp, sbp); 580 if (error) 581 return error; 582 } 583 } else if (sbp->sb_qflags & (XFS_PQUOTA_ENFD | XFS_GQUOTA_ENFD | 584 XFS_PQUOTA_CHKD | XFS_GQUOTA_CHKD)) { 585 xfs_notice(mp, 586 "Superblock earlier than Version 5 has XFS_{P|G}QUOTA_{ENFD|CHKD} bits."); 587 return -EFSCORRUPTED; 588 } 589 590 if (unlikely( 591 sbp->sb_logstart == 0 && mp->m_logdev_targp == mp->m_ddev_targp)) { 592 xfs_warn(mp, 593 "filesystem is marked as having an external log; " 594 "specify logdev on the mount command line."); 595 return -EINVAL; 596 } 597 598 if (unlikely( 599 sbp->sb_logstart != 0 && mp->m_logdev_targp != mp->m_ddev_targp)) { 600 xfs_warn(mp, 601 "filesystem is marked as having an internal log; " 602 "do not specify logdev on the mount command line."); 603 return -EINVAL; 604 } 605 606 /* Compute agcount for this number of dblocks and agblocks */ 607 if (sbp->sb_agblocks) { 608 agcount = div_u64_rem(sbp->sb_dblocks, sbp->sb_agblocks, &rem); 609 if (rem) 610 agcount++; 611 } 612 613 /* 614 * More sanity checking. Most of these were stolen directly from 615 * xfs_repair. 616 */ 617 if (unlikely( 618 sbp->sb_agcount <= 0 || 619 sbp->sb_sectsize < XFS_MIN_SECTORSIZE || 620 sbp->sb_sectsize > XFS_MAX_SECTORSIZE || 621 sbp->sb_sectlog < XFS_MIN_SECTORSIZE_LOG || 622 sbp->sb_sectlog > XFS_MAX_SECTORSIZE_LOG || 623 sbp->sb_sectsize != (1 << sbp->sb_sectlog) || 624 sbp->sb_blocksize < XFS_MIN_BLOCKSIZE || 625 sbp->sb_blocksize > XFS_MAX_BLOCKSIZE || 626 sbp->sb_blocklog < XFS_MIN_BLOCKSIZE_LOG || 627 sbp->sb_blocklog > XFS_MAX_BLOCKSIZE_LOG || 628 sbp->sb_blocksize != (1 << sbp->sb_blocklog) || 629 sbp->sb_dirblklog + sbp->sb_blocklog > XFS_MAX_BLOCKSIZE_LOG || 630 sbp->sb_inodesize < XFS_DINODE_MIN_SIZE || 631 sbp->sb_inodesize > XFS_DINODE_MAX_SIZE || 632 sbp->sb_inodelog < XFS_DINODE_MIN_LOG || 633 sbp->sb_inodelog > XFS_DINODE_MAX_LOG || 634 sbp->sb_inodesize != (1 << sbp->sb_inodelog) || 635 sbp->sb_inopblock != howmany(sbp->sb_blocksize,sbp->sb_inodesize) || 636 XFS_FSB_TO_B(mp, sbp->sb_agblocks) < XFS_MIN_AG_BYTES || 637 XFS_FSB_TO_B(mp, sbp->sb_agblocks) > XFS_MAX_AG_BYTES || 638 sbp->sb_agblklog != xfs_highbit32(sbp->sb_agblocks - 1) + 1 || 639 agcount == 0 || agcount != sbp->sb_agcount || 640 (sbp->sb_blocklog - sbp->sb_inodelog != sbp->sb_inopblog) || 641 (sbp->sb_rextsize * sbp->sb_blocksize > XFS_MAX_RTEXTSIZE) || 642 (sbp->sb_rextsize * sbp->sb_blocksize < XFS_MIN_RTEXTSIZE) || 643 (sbp->sb_imax_pct > 100 /* zero sb_imax_pct is valid */) || 644 sbp->sb_dblocks == 0 || 645 sbp->sb_dblocks > XFS_MAX_DBLOCKS(sbp) || 646 sbp->sb_dblocks < XFS_MIN_DBLOCKS(sbp) || 647 sbp->sb_shared_vn != 0)) { 648 xfs_notice(mp, "SB sanity check failed"); 649 return -EFSCORRUPTED; 650 } 651 652 /* 653 * Logs that are too large are not supported at all. Reject them 654 * outright. Logs that are too small are tolerated on v4 filesystems, 655 * but we can only check that when mounting the log. Hence we skip 656 * those checks here. 657 */ 658 if (sbp->sb_logblocks > XFS_MAX_LOG_BLOCKS) { 659 xfs_notice(mp, 660 "Log size 0x%x blocks too large, maximum size is 0x%llx blocks", 661 sbp->sb_logblocks, XFS_MAX_LOG_BLOCKS); 662 return -EFSCORRUPTED; 663 } 664 665 if (XFS_FSB_TO_B(mp, sbp->sb_logblocks) > XFS_MAX_LOG_BYTES) { 666 xfs_warn(mp, 667 "log size 0x%llx bytes too large, maximum size is 0x%llx bytes", 668 XFS_FSB_TO_B(mp, sbp->sb_logblocks), 669 XFS_MAX_LOG_BYTES); 670 return -EFSCORRUPTED; 671 } 672 673 /* 674 * Do not allow filesystems with corrupted log sector or stripe units to 675 * be mounted. We cannot safely size the iclogs or write to the log if 676 * the log stripe unit is not valid. 677 */ 678 if (sbp->sb_versionnum & XFS_SB_VERSION_SECTORBIT) { 679 if (sbp->sb_logsectsize != (1U << sbp->sb_logsectlog)) { 680 xfs_notice(mp, 681 "log sector size in bytes/log2 (0x%x/0x%x) must match", 682 sbp->sb_logsectsize, 1U << sbp->sb_logsectlog); 683 return -EFSCORRUPTED; 684 } 685 } else if (sbp->sb_logsectsize || sbp->sb_logsectlog) { 686 xfs_notice(mp, 687 "log sector size in bytes/log2 (0x%x/0x%x) are not zero", 688 sbp->sb_logsectsize, sbp->sb_logsectlog); 689 return -EFSCORRUPTED; 690 } 691 692 if (sbp->sb_logsunit > 1) { 693 if (sbp->sb_logsunit % sbp->sb_blocksize) { 694 xfs_notice(mp, 695 "log stripe unit 0x%x bytes must be a multiple of block size", 696 sbp->sb_logsunit); 697 return -EFSCORRUPTED; 698 } 699 if (sbp->sb_logsunit > XLOG_MAX_RECORD_BSIZE) { 700 xfs_notice(mp, 701 "log stripe unit 0x%x bytes over maximum size (0x%x bytes)", 702 sbp->sb_logsunit, XLOG_MAX_RECORD_BSIZE); 703 return -EFSCORRUPTED; 704 } 705 } 706 707 if (!xfs_validate_rt_geometry(sbp)) { 708 xfs_notice(mp, 709 "realtime %sgeometry check failed", 710 sbp->sb_rblocks ? "" : "zeroed "); 711 return -EFSCORRUPTED; 712 } 713 714 /* 715 * Either (sb_unit and !hasdalign) or (!sb_unit and hasdalign) 716 * would imply the image is corrupted. 717 */ 718 has_dalign = sbp->sb_versionnum & XFS_SB_VERSION_DALIGNBIT; 719 if (!!sbp->sb_unit ^ has_dalign) { 720 xfs_notice(mp, "SB stripe alignment sanity check failed"); 721 return -EFSCORRUPTED; 722 } 723 724 if (!xfs_validate_stripe_geometry(mp, XFS_FSB_TO_B(mp, sbp->sb_unit), 725 XFS_FSB_TO_B(mp, sbp->sb_width), 0, 726 xfs_buf_daddr(bp) == XFS_SB_DADDR, false)) 727 return -EFSCORRUPTED; 728 729 /* 730 * Currently only very few inode sizes are supported. 731 */ 732 switch (sbp->sb_inodesize) { 733 case 256: 734 case 512: 735 case 1024: 736 case 2048: 737 break; 738 default: 739 xfs_warn(mp, "inode size of %d bytes not supported", 740 sbp->sb_inodesize); 741 return -ENOSYS; 742 } 743 744 return 0; 745 } 746 747 void 748 xfs_sb_quota_from_disk(struct xfs_sb *sbp) 749 { 750 if (xfs_sb_is_v5(sbp) && 751 (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_METADIR)) { 752 sbp->sb_uquotino = NULLFSINO; 753 sbp->sb_gquotino = NULLFSINO; 754 sbp->sb_pquotino = NULLFSINO; 755 return; 756 } 757 758 /* 759 * older mkfs doesn't initialize quota inodes to NULLFSINO. This 760 * leads to in-core values having two different values for a quota 761 * inode to be invalid: 0 and NULLFSINO. Change it to a single value 762 * NULLFSINO. 763 * 764 * Note that this change affect only the in-core values. These 765 * values are not written back to disk unless any quota information 766 * is written to the disk. Even in that case, sb_pquotino field is 767 * not written to disk unless the superblock supports pquotino. 768 */ 769 if (sbp->sb_uquotino == 0) 770 sbp->sb_uquotino = NULLFSINO; 771 if (sbp->sb_gquotino == 0) 772 sbp->sb_gquotino = NULLFSINO; 773 if (sbp->sb_pquotino == 0) 774 sbp->sb_pquotino = NULLFSINO; 775 776 /* 777 * We need to do these manipilations only if we are working 778 * with an older version of on-disk superblock. 779 */ 780 if (xfs_sb_is_v5(sbp)) 781 return; 782 783 if (sbp->sb_qflags & XFS_OQUOTA_ENFD) 784 sbp->sb_qflags |= (sbp->sb_qflags & XFS_PQUOTA_ACCT) ? 785 XFS_PQUOTA_ENFD : XFS_GQUOTA_ENFD; 786 if (sbp->sb_qflags & XFS_OQUOTA_CHKD) 787 sbp->sb_qflags |= (sbp->sb_qflags & XFS_PQUOTA_ACCT) ? 788 XFS_PQUOTA_CHKD : XFS_GQUOTA_CHKD; 789 sbp->sb_qflags &= ~(XFS_OQUOTA_ENFD | XFS_OQUOTA_CHKD); 790 791 if (sbp->sb_qflags & XFS_PQUOTA_ACCT && 792 sbp->sb_gquotino != NULLFSINO) { 793 /* 794 * In older version of superblock, on-disk superblock only 795 * has sb_gquotino, and in-core superblock has both sb_gquotino 796 * and sb_pquotino. But, only one of them is supported at any 797 * point of time. So, if PQUOTA is set in disk superblock, 798 * copy over sb_gquotino to sb_pquotino. The NULLFSINO test 799 * above is to make sure we don't do this twice and wipe them 800 * both out! 801 */ 802 sbp->sb_pquotino = sbp->sb_gquotino; 803 sbp->sb_gquotino = NULLFSINO; 804 } 805 } 806 807 static void 808 __xfs_sb_from_disk( 809 struct xfs_sb *to, 810 struct xfs_dsb *from, 811 bool convert_xquota) 812 { 813 to->sb_magicnum = be32_to_cpu(from->sb_magicnum); 814 to->sb_blocksize = be32_to_cpu(from->sb_blocksize); 815 to->sb_dblocks = be64_to_cpu(from->sb_dblocks); 816 to->sb_rblocks = be64_to_cpu(from->sb_rblocks); 817 to->sb_rextents = be64_to_cpu(from->sb_rextents); 818 memcpy(&to->sb_uuid, &from->sb_uuid, sizeof(to->sb_uuid)); 819 to->sb_logstart = be64_to_cpu(from->sb_logstart); 820 to->sb_rootino = be64_to_cpu(from->sb_rootino); 821 to->sb_rbmino = be64_to_cpu(from->sb_rbmino); 822 to->sb_rsumino = be64_to_cpu(from->sb_rsumino); 823 to->sb_rextsize = be32_to_cpu(from->sb_rextsize); 824 to->sb_agblocks = be32_to_cpu(from->sb_agblocks); 825 to->sb_agcount = be32_to_cpu(from->sb_agcount); 826 to->sb_rbmblocks = be32_to_cpu(from->sb_rbmblocks); 827 to->sb_logblocks = be32_to_cpu(from->sb_logblocks); 828 to->sb_versionnum = be16_to_cpu(from->sb_versionnum); 829 to->sb_sectsize = be16_to_cpu(from->sb_sectsize); 830 to->sb_inodesize = be16_to_cpu(from->sb_inodesize); 831 to->sb_inopblock = be16_to_cpu(from->sb_inopblock); 832 memcpy(&to->sb_fname, &from->sb_fname, sizeof(to->sb_fname)); 833 to->sb_blocklog = from->sb_blocklog; 834 to->sb_sectlog = from->sb_sectlog; 835 to->sb_inodelog = from->sb_inodelog; 836 to->sb_inopblog = from->sb_inopblog; 837 to->sb_agblklog = from->sb_agblklog; 838 to->sb_rextslog = from->sb_rextslog; 839 to->sb_inprogress = from->sb_inprogress; 840 to->sb_imax_pct = from->sb_imax_pct; 841 to->sb_icount = be64_to_cpu(from->sb_icount); 842 to->sb_ifree = be64_to_cpu(from->sb_ifree); 843 to->sb_fdblocks = be64_to_cpu(from->sb_fdblocks); 844 to->sb_frextents = be64_to_cpu(from->sb_frextents); 845 to->sb_uquotino = be64_to_cpu(from->sb_uquotino); 846 to->sb_gquotino = be64_to_cpu(from->sb_gquotino); 847 to->sb_qflags = be16_to_cpu(from->sb_qflags); 848 to->sb_flags = from->sb_flags; 849 to->sb_shared_vn = from->sb_shared_vn; 850 to->sb_inoalignmt = be32_to_cpu(from->sb_inoalignmt); 851 to->sb_unit = be32_to_cpu(from->sb_unit); 852 to->sb_width = be32_to_cpu(from->sb_width); 853 to->sb_dirblklog = from->sb_dirblklog; 854 to->sb_logsectlog = from->sb_logsectlog; 855 to->sb_logsectsize = be16_to_cpu(from->sb_logsectsize); 856 to->sb_logsunit = be32_to_cpu(from->sb_logsunit); 857 to->sb_features2 = be32_to_cpu(from->sb_features2); 858 to->sb_bad_features2 = be32_to_cpu(from->sb_bad_features2); 859 to->sb_features_compat = be32_to_cpu(from->sb_features_compat); 860 to->sb_features_ro_compat = be32_to_cpu(from->sb_features_ro_compat); 861 to->sb_features_incompat = be32_to_cpu(from->sb_features_incompat); 862 to->sb_features_log_incompat = 863 be32_to_cpu(from->sb_features_log_incompat); 864 /* crc is only used on disk, not in memory; just init to 0 here. */ 865 to->sb_crc = 0; 866 to->sb_spino_align = be32_to_cpu(from->sb_spino_align); 867 to->sb_pquotino = be64_to_cpu(from->sb_pquotino); 868 to->sb_lsn = be64_to_cpu(from->sb_lsn); 869 /* 870 * sb_meta_uuid is only on disk if it differs from sb_uuid and the 871 * feature flag is set; if not set we keep it only in memory. 872 */ 873 if (xfs_sb_is_v5(to) && 874 (to->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_META_UUID)) 875 uuid_copy(&to->sb_meta_uuid, &from->sb_meta_uuid); 876 else 877 uuid_copy(&to->sb_meta_uuid, &from->sb_uuid); 878 /* Convert on-disk flags to in-memory flags? */ 879 if (convert_xquota) 880 xfs_sb_quota_from_disk(to); 881 882 if (to->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_METADIR) { 883 to->sb_metadirino = be64_to_cpu(from->sb_metadirino); 884 to->sb_rgblklog = from->sb_rgblklog; 885 memcpy(to->sb_pad, from->sb_pad, sizeof(to->sb_pad)); 886 to->sb_rgcount = be32_to_cpu(from->sb_rgcount); 887 to->sb_rgextents = be32_to_cpu(from->sb_rgextents); 888 to->sb_rbmino = NULLFSINO; 889 to->sb_rsumino = NULLFSINO; 890 } else { 891 to->sb_metadirino = NULLFSINO; 892 to->sb_rgcount = 1; 893 to->sb_rgextents = 0; 894 } 895 896 if (to->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_ZONED) { 897 to->sb_rtstart = be64_to_cpu(from->sb_rtstart); 898 to->sb_rtreserved = be64_to_cpu(from->sb_rtreserved); 899 } else { 900 to->sb_rtstart = 0; 901 to->sb_rtreserved = 0; 902 } 903 } 904 905 void 906 xfs_sb_from_disk( 907 struct xfs_sb *to, 908 struct xfs_dsb *from) 909 { 910 __xfs_sb_from_disk(to, from, true); 911 } 912 913 static void 914 xfs_sb_quota_to_disk( 915 struct xfs_dsb *to, 916 struct xfs_sb *from) 917 { 918 uint16_t qflags = from->sb_qflags; 919 920 if (xfs_sb_is_v5(from) && 921 (from->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_METADIR)) { 922 to->sb_qflags = cpu_to_be16(from->sb_qflags); 923 to->sb_uquotino = cpu_to_be64(0); 924 to->sb_gquotino = cpu_to_be64(0); 925 to->sb_pquotino = cpu_to_be64(0); 926 return; 927 } 928 929 to->sb_uquotino = cpu_to_be64(from->sb_uquotino); 930 931 /* 932 * The in-memory superblock quota state matches the v5 on-disk format so 933 * just write them out and return 934 */ 935 if (xfs_sb_is_v5(from)) { 936 to->sb_qflags = cpu_to_be16(from->sb_qflags); 937 to->sb_gquotino = cpu_to_be64(from->sb_gquotino); 938 to->sb_pquotino = cpu_to_be64(from->sb_pquotino); 939 return; 940 } 941 942 /* 943 * For older superblocks (v4), the in-core version of sb_qflags do not 944 * have XFS_OQUOTA_* flags, whereas the on-disk version does. So, 945 * convert incore XFS_{PG}QUOTA_* flags to on-disk XFS_OQUOTA_* flags. 946 */ 947 qflags &= ~(XFS_PQUOTA_ENFD | XFS_PQUOTA_CHKD | 948 XFS_GQUOTA_ENFD | XFS_GQUOTA_CHKD); 949 950 if (from->sb_qflags & 951 (XFS_PQUOTA_ENFD | XFS_GQUOTA_ENFD)) 952 qflags |= XFS_OQUOTA_ENFD; 953 if (from->sb_qflags & 954 (XFS_PQUOTA_CHKD | XFS_GQUOTA_CHKD)) 955 qflags |= XFS_OQUOTA_CHKD; 956 to->sb_qflags = cpu_to_be16(qflags); 957 958 /* 959 * GQUOTINO and PQUOTINO cannot be used together in versions 960 * of superblock that do not have pquotino. from->sb_flags 961 * tells us which quota is active and should be copied to 962 * disk. If neither are active, we should NULL the inode. 963 * 964 * In all cases, the separate pquotino must remain 0 because it 965 * is beyond the "end" of the valid non-pquotino superblock. 966 */ 967 if (from->sb_qflags & XFS_GQUOTA_ACCT) 968 to->sb_gquotino = cpu_to_be64(from->sb_gquotino); 969 else if (from->sb_qflags & XFS_PQUOTA_ACCT) 970 to->sb_gquotino = cpu_to_be64(from->sb_pquotino); 971 else { 972 /* 973 * We can't rely on just the fields being logged to tell us 974 * that it is safe to write NULLFSINO - we should only do that 975 * if quotas are not actually enabled. Hence only write 976 * NULLFSINO if both in-core quota inodes are NULL. 977 */ 978 if (from->sb_gquotino == NULLFSINO && 979 from->sb_pquotino == NULLFSINO) 980 to->sb_gquotino = cpu_to_be64(NULLFSINO); 981 } 982 983 to->sb_pquotino = 0; 984 } 985 986 void 987 xfs_sb_to_disk( 988 struct xfs_dsb *to, 989 struct xfs_sb *from) 990 { 991 xfs_sb_quota_to_disk(to, from); 992 993 to->sb_magicnum = cpu_to_be32(from->sb_magicnum); 994 to->sb_blocksize = cpu_to_be32(from->sb_blocksize); 995 to->sb_dblocks = cpu_to_be64(from->sb_dblocks); 996 to->sb_rblocks = cpu_to_be64(from->sb_rblocks); 997 to->sb_rextents = cpu_to_be64(from->sb_rextents); 998 memcpy(&to->sb_uuid, &from->sb_uuid, sizeof(to->sb_uuid)); 999 to->sb_logstart = cpu_to_be64(from->sb_logstart); 1000 to->sb_rootino = cpu_to_be64(from->sb_rootino); 1001 to->sb_rbmino = cpu_to_be64(from->sb_rbmino); 1002 to->sb_rsumino = cpu_to_be64(from->sb_rsumino); 1003 to->sb_rextsize = cpu_to_be32(from->sb_rextsize); 1004 to->sb_agblocks = cpu_to_be32(from->sb_agblocks); 1005 to->sb_agcount = cpu_to_be32(from->sb_agcount); 1006 to->sb_rbmblocks = cpu_to_be32(from->sb_rbmblocks); 1007 to->sb_logblocks = cpu_to_be32(from->sb_logblocks); 1008 to->sb_versionnum = cpu_to_be16(from->sb_versionnum); 1009 to->sb_sectsize = cpu_to_be16(from->sb_sectsize); 1010 to->sb_inodesize = cpu_to_be16(from->sb_inodesize); 1011 to->sb_inopblock = cpu_to_be16(from->sb_inopblock); 1012 memcpy(&to->sb_fname, &from->sb_fname, sizeof(to->sb_fname)); 1013 to->sb_blocklog = from->sb_blocklog; 1014 to->sb_sectlog = from->sb_sectlog; 1015 to->sb_inodelog = from->sb_inodelog; 1016 to->sb_inopblog = from->sb_inopblog; 1017 to->sb_agblklog = from->sb_agblklog; 1018 to->sb_rextslog = from->sb_rextslog; 1019 to->sb_inprogress = from->sb_inprogress; 1020 to->sb_imax_pct = from->sb_imax_pct; 1021 to->sb_icount = cpu_to_be64(from->sb_icount); 1022 to->sb_ifree = cpu_to_be64(from->sb_ifree); 1023 to->sb_fdblocks = cpu_to_be64(from->sb_fdblocks); 1024 to->sb_frextents = cpu_to_be64(from->sb_frextents); 1025 1026 to->sb_flags = from->sb_flags; 1027 to->sb_shared_vn = from->sb_shared_vn; 1028 to->sb_inoalignmt = cpu_to_be32(from->sb_inoalignmt); 1029 to->sb_unit = cpu_to_be32(from->sb_unit); 1030 to->sb_width = cpu_to_be32(from->sb_width); 1031 to->sb_dirblklog = from->sb_dirblklog; 1032 to->sb_logsectlog = from->sb_logsectlog; 1033 to->sb_logsectsize = cpu_to_be16(from->sb_logsectsize); 1034 to->sb_logsunit = cpu_to_be32(from->sb_logsunit); 1035 1036 /* 1037 * We need to ensure that bad_features2 always matches features2. 1038 * Hence we enforce that here rather than having to remember to do it 1039 * everywhere else that updates features2. 1040 */ 1041 from->sb_bad_features2 = from->sb_features2; 1042 to->sb_features2 = cpu_to_be32(from->sb_features2); 1043 to->sb_bad_features2 = cpu_to_be32(from->sb_bad_features2); 1044 1045 if (!xfs_sb_is_v5(from)) 1046 return; 1047 1048 to->sb_features_compat = cpu_to_be32(from->sb_features_compat); 1049 to->sb_features_ro_compat = 1050 cpu_to_be32(from->sb_features_ro_compat); 1051 to->sb_features_incompat = 1052 cpu_to_be32(from->sb_features_incompat); 1053 to->sb_features_log_incompat = 1054 cpu_to_be32(from->sb_features_log_incompat); 1055 to->sb_spino_align = cpu_to_be32(from->sb_spino_align); 1056 to->sb_lsn = cpu_to_be64(from->sb_lsn); 1057 if (from->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_META_UUID) 1058 uuid_copy(&to->sb_meta_uuid, &from->sb_meta_uuid); 1059 1060 if (from->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_METADIR) { 1061 to->sb_metadirino = cpu_to_be64(from->sb_metadirino); 1062 to->sb_rgblklog = from->sb_rgblklog; 1063 memset(to->sb_pad, 0, sizeof(to->sb_pad)); 1064 to->sb_rgcount = cpu_to_be32(from->sb_rgcount); 1065 to->sb_rgextents = cpu_to_be32(from->sb_rgextents); 1066 to->sb_rbmino = cpu_to_be64(0); 1067 to->sb_rsumino = cpu_to_be64(0); 1068 } 1069 1070 if (from->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_ZONED) { 1071 to->sb_rtstart = cpu_to_be64(from->sb_rtstart); 1072 to->sb_rtreserved = cpu_to_be64(from->sb_rtreserved); 1073 } 1074 } 1075 1076 /* 1077 * If the superblock has the CRC feature bit set or the CRC field is non-null, 1078 * check that the CRC is valid. We check the CRC field is non-null because a 1079 * single bit error could clear the feature bit and unused parts of the 1080 * superblock are supposed to be zero. Hence a non-null crc field indicates that 1081 * we've potentially lost a feature bit and we should check it anyway. 1082 * 1083 * However, past bugs (i.e. in growfs) left non-zeroed regions beyond the 1084 * last field in V4 secondary superblocks. So for secondary superblocks, 1085 * we are more forgiving, and ignore CRC failures if the primary doesn't 1086 * indicate that the fs version is V5. 1087 */ 1088 static void 1089 xfs_sb_read_verify( 1090 struct xfs_buf *bp) 1091 { 1092 struct xfs_sb sb; 1093 struct xfs_mount *mp = bp->b_mount; 1094 struct xfs_dsb *dsb = bp->b_addr; 1095 int error; 1096 1097 /* 1098 * open code the version check to avoid needing to convert the entire 1099 * superblock from disk order just to check the version number 1100 */ 1101 if (dsb->sb_magicnum == cpu_to_be32(XFS_SB_MAGIC) && 1102 (((be16_to_cpu(dsb->sb_versionnum) & XFS_SB_VERSION_NUMBITS) == 1103 XFS_SB_VERSION_5) || 1104 dsb->sb_crc != 0)) { 1105 1106 if (!xfs_buf_verify_cksum(bp, XFS_SB_CRC_OFF)) { 1107 /* Only fail bad secondaries on a known V5 filesystem */ 1108 if (xfs_buf_daddr(bp) == XFS_SB_DADDR || 1109 xfs_has_crc(mp)) { 1110 error = -EFSBADCRC; 1111 goto out_error; 1112 } 1113 } 1114 } 1115 1116 /* 1117 * Check all the superblock fields. Don't byteswap the xquota flags 1118 * because _verify_common checks the on-disk values. 1119 */ 1120 __xfs_sb_from_disk(&sb, dsb, false); 1121 error = xfs_validate_sb_common(mp, bp, &sb); 1122 if (error) 1123 goto out_error; 1124 error = xfs_validate_sb_read(mp, &sb); 1125 1126 out_error: 1127 if (error == -EFSCORRUPTED || error == -EFSBADCRC) 1128 xfs_verifier_error(bp, error, __this_address); 1129 else if (error) 1130 xfs_buf_ioerror(bp, error); 1131 } 1132 1133 /* 1134 * We may be probed for a filesystem match, so we may not want to emit 1135 * messages when the superblock buffer is not actually an XFS superblock. 1136 * If we find an XFS superblock, then run a normal, noisy mount because we are 1137 * really going to mount it and want to know about errors. 1138 */ 1139 static void 1140 xfs_sb_quiet_read_verify( 1141 struct xfs_buf *bp) 1142 { 1143 struct xfs_dsb *dsb = bp->b_addr; 1144 1145 if (dsb->sb_magicnum == cpu_to_be32(XFS_SB_MAGIC)) { 1146 /* XFS filesystem, verify noisily! */ 1147 xfs_sb_read_verify(bp); 1148 return; 1149 } 1150 /* quietly fail */ 1151 xfs_buf_ioerror(bp, -EWRONGFS); 1152 } 1153 1154 static void 1155 xfs_sb_write_verify( 1156 struct xfs_buf *bp) 1157 { 1158 struct xfs_sb sb; 1159 struct xfs_mount *mp = bp->b_mount; 1160 struct xfs_buf_log_item *bip = bp->b_log_item; 1161 struct xfs_dsb *dsb = bp->b_addr; 1162 int error; 1163 1164 /* 1165 * Check all the superblock fields. Don't byteswap the xquota flags 1166 * because _verify_common checks the on-disk values. 1167 */ 1168 __xfs_sb_from_disk(&sb, dsb, false); 1169 error = xfs_validate_sb_common(mp, bp, &sb); 1170 if (error) 1171 goto out_error; 1172 error = xfs_validate_sb_write(mp, bp, &sb); 1173 if (error) 1174 goto out_error; 1175 1176 if (!xfs_sb_is_v5(&sb)) 1177 return; 1178 1179 if (bip) 1180 dsb->sb_lsn = cpu_to_be64(bip->bli_item.li_lsn); 1181 1182 xfs_buf_update_cksum(bp, XFS_SB_CRC_OFF); 1183 return; 1184 1185 out_error: 1186 xfs_verifier_error(bp, error, __this_address); 1187 } 1188 1189 const struct xfs_buf_ops xfs_sb_buf_ops = { 1190 .name = "xfs_sb", 1191 .magic = { cpu_to_be32(XFS_SB_MAGIC), cpu_to_be32(XFS_SB_MAGIC) }, 1192 .verify_read = xfs_sb_read_verify, 1193 .verify_write = xfs_sb_write_verify, 1194 }; 1195 1196 const struct xfs_buf_ops xfs_sb_quiet_buf_ops = { 1197 .name = "xfs_sb_quiet", 1198 .magic = { cpu_to_be32(XFS_SB_MAGIC), cpu_to_be32(XFS_SB_MAGIC) }, 1199 .verify_read = xfs_sb_quiet_read_verify, 1200 .verify_write = xfs_sb_write_verify, 1201 }; 1202 1203 /* Compute cached rt geometry from the incore sb. */ 1204 void 1205 xfs_sb_mount_rextsize( 1206 struct xfs_mount *mp, 1207 struct xfs_sb *sbp) 1208 { 1209 struct xfs_groups *rgs = &mp->m_groups[XG_TYPE_RTG]; 1210 1211 mp->m_rtxblklog = log2_if_power2(sbp->sb_rextsize); 1212 mp->m_rtxblkmask = mask64_if_power2(sbp->sb_rextsize); 1213 1214 if (xfs_sb_is_v5(sbp) && 1215 (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_METADIR)) { 1216 rgs->blocks = sbp->sb_rgextents * sbp->sb_rextsize; 1217 rgs->blklog = mp->m_sb.sb_rgblklog; 1218 rgs->blkmask = xfs_mask32lo(mp->m_sb.sb_rgblklog); 1219 rgs->start_fsb = mp->m_sb.sb_rtstart; 1220 if (xfs_sb_has_incompat_feature(sbp, 1221 XFS_SB_FEAT_INCOMPAT_ZONE_GAPS)) 1222 rgs->has_daddr_gaps = true; 1223 } else { 1224 rgs->blocks = 0; 1225 rgs->blklog = 0; 1226 rgs->blkmask = (uint64_t)-1; 1227 } 1228 } 1229 1230 /* Update incore sb rt extent size, then recompute the cached rt geometry. */ 1231 void 1232 xfs_mount_sb_set_rextsize( 1233 struct xfs_mount *mp, 1234 struct xfs_sb *sbp, 1235 xfs_agblock_t rextsize) 1236 { 1237 sbp->sb_rextsize = rextsize; 1238 if (xfs_sb_is_v5(sbp) && 1239 (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_METADIR)) 1240 sbp->sb_rgblklog = xfs_compute_rgblklog(sbp->sb_rgextents, 1241 rextsize); 1242 1243 xfs_sb_mount_rextsize(mp, sbp); 1244 } 1245 1246 /* 1247 * xfs_mount_common 1248 * 1249 * Mount initialization code establishing various mount 1250 * fields from the superblock associated with the given 1251 * mount structure. 1252 * 1253 * Inode geometry are calculated in xfs_ialloc_setup_geometry. 1254 */ 1255 void 1256 xfs_sb_mount_common( 1257 struct xfs_mount *mp, 1258 struct xfs_sb *sbp) 1259 { 1260 struct xfs_groups *ags = &mp->m_groups[XG_TYPE_AG]; 1261 1262 mp->m_agfrotor = 0; 1263 atomic_set(&mp->m_agirotor, 0); 1264 mp->m_maxagi = mp->m_sb.sb_agcount; 1265 mp->m_blkbit_log = sbp->sb_blocklog + XFS_NBBYLOG; 1266 mp->m_blkbb_log = sbp->sb_blocklog - BBSHIFT; 1267 mp->m_sectbb_log = sbp->sb_sectlog - BBSHIFT; 1268 mp->m_agno_log = xfs_highbit32(sbp->sb_agcount - 1) + 1; 1269 mp->m_blockmask = sbp->sb_blocksize - 1; 1270 mp->m_blockwsize = xfs_rtbmblock_size(sbp) >> XFS_WORDLOG; 1271 mp->m_rtx_per_rbmblock = mp->m_blockwsize << XFS_NBWORDLOG; 1272 1273 ags->blocks = mp->m_sb.sb_agblocks; 1274 ags->blklog = mp->m_sb.sb_agblklog; 1275 ags->blkmask = xfs_mask32lo(mp->m_sb.sb_agblklog); 1276 1277 xfs_sb_mount_rextsize(mp, sbp); 1278 1279 mp->m_alloc_mxr[0] = xfs_allocbt_maxrecs(mp, sbp->sb_blocksize, true); 1280 mp->m_alloc_mxr[1] = xfs_allocbt_maxrecs(mp, sbp->sb_blocksize, false); 1281 mp->m_alloc_mnr[0] = mp->m_alloc_mxr[0] / 2; 1282 mp->m_alloc_mnr[1] = mp->m_alloc_mxr[1] / 2; 1283 1284 mp->m_bmap_dmxr[0] = xfs_bmbt_maxrecs(mp, sbp->sb_blocksize, true); 1285 mp->m_bmap_dmxr[1] = xfs_bmbt_maxrecs(mp, sbp->sb_blocksize, false); 1286 mp->m_bmap_dmnr[0] = mp->m_bmap_dmxr[0] / 2; 1287 mp->m_bmap_dmnr[1] = mp->m_bmap_dmxr[1] / 2; 1288 1289 mp->m_rmap_mxr[0] = xfs_rmapbt_maxrecs(mp, sbp->sb_blocksize, true); 1290 mp->m_rmap_mxr[1] = xfs_rmapbt_maxrecs(mp, sbp->sb_blocksize, false); 1291 mp->m_rmap_mnr[0] = mp->m_rmap_mxr[0] / 2; 1292 mp->m_rmap_mnr[1] = mp->m_rmap_mxr[1] / 2; 1293 1294 mp->m_rtrmap_mxr[0] = xfs_rtrmapbt_maxrecs(mp, sbp->sb_blocksize, true); 1295 mp->m_rtrmap_mxr[1] = xfs_rtrmapbt_maxrecs(mp, sbp->sb_blocksize, false); 1296 mp->m_rtrmap_mnr[0] = mp->m_rtrmap_mxr[0] / 2; 1297 mp->m_rtrmap_mnr[1] = mp->m_rtrmap_mxr[1] / 2; 1298 1299 mp->m_refc_mxr[0] = xfs_refcountbt_maxrecs(mp, sbp->sb_blocksize, true); 1300 mp->m_refc_mxr[1] = xfs_refcountbt_maxrecs(mp, sbp->sb_blocksize, false); 1301 mp->m_refc_mnr[0] = mp->m_refc_mxr[0] / 2; 1302 mp->m_refc_mnr[1] = mp->m_refc_mxr[1] / 2; 1303 1304 mp->m_rtrefc_mxr[0] = xfs_rtrefcountbt_maxrecs(mp, sbp->sb_blocksize, 1305 true); 1306 mp->m_rtrefc_mxr[1] = xfs_rtrefcountbt_maxrecs(mp, sbp->sb_blocksize, 1307 false); 1308 mp->m_rtrefc_mnr[0] = mp->m_rtrefc_mxr[0] / 2; 1309 mp->m_rtrefc_mnr[1] = mp->m_rtrefc_mxr[1] / 2; 1310 1311 mp->m_bsize = XFS_FSB_TO_BB(mp, 1); 1312 mp->m_alloc_set_aside = xfs_alloc_set_aside(mp); 1313 mp->m_ag_max_usable = xfs_alloc_ag_max_usable(mp); 1314 } 1315 1316 /* 1317 * xfs_log_sb() can be used to copy arbitrary changes to the in-core superblock 1318 * into the superblock buffer to be logged. It does not provide the higher 1319 * level of locking that is needed to protect the in-core superblock from 1320 * concurrent access. 1321 */ 1322 void 1323 xfs_log_sb( 1324 struct xfs_trans *tp) 1325 { 1326 struct xfs_mount *mp = tp->t_mountp; 1327 struct xfs_buf *bp = xfs_trans_getsb(tp); 1328 1329 /* 1330 * Lazy sb counters don't update the in-core superblock so do that now. 1331 * If this is at unmount, the counters will be exactly correct, but at 1332 * any other time they will only be ballpark correct because of 1333 * reservations that have been taken out percpu counters. If we have an 1334 * unclean shutdown, this will be corrected by log recovery rebuilding 1335 * the counters from the AGF block counts. 1336 */ 1337 if (xfs_has_lazysbcount(mp)) { 1338 mp->m_sb.sb_icount = percpu_counter_sum_positive(&mp->m_icount); 1339 mp->m_sb.sb_ifree = min_t(uint64_t, 1340 percpu_counter_sum_positive(&mp->m_ifree), 1341 mp->m_sb.sb_icount); 1342 mp->m_sb.sb_fdblocks = xfs_sum_freecounter(mp, XC_FREE_BLOCKS); 1343 } 1344 1345 /* 1346 * sb_frextents was added to the lazy sb counters when the rt groups 1347 * feature was introduced. This counter can go negative due to the way 1348 * we handle nearly-lockless reservations, so we must use the _positive 1349 * variant here to avoid writing out nonsense frextents. 1350 */ 1351 if (xfs_has_rtgroups(mp) && !xfs_has_zoned(mp)) { 1352 mp->m_sb.sb_frextents = 1353 xfs_sum_freecounter(mp, XC_FREE_RTEXTENTS); 1354 } 1355 1356 xfs_sb_to_disk(bp->b_addr, &mp->m_sb); 1357 xfs_trans_buf_set_type(tp, bp, XFS_BLFT_SB_BUF); 1358 xfs_trans_log_buf(tp, bp, 0, sizeof(struct xfs_dsb) - 1); 1359 } 1360 1361 /* 1362 * xfs_sync_sb 1363 * 1364 * Sync the superblock to disk. 1365 * 1366 * Note that the caller is responsible for checking the frozen state of the 1367 * filesystem. This procedure uses the non-blocking transaction allocator and 1368 * thus will allow modifications to a frozen fs. This is required because this 1369 * code can be called during the process of freezing where use of the high-level 1370 * allocator would deadlock. 1371 */ 1372 int 1373 xfs_sync_sb( 1374 struct xfs_mount *mp, 1375 bool wait) 1376 { 1377 struct xfs_trans *tp; 1378 int error; 1379 1380 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_sb, 0, 0, 1381 XFS_TRANS_NO_WRITECOUNT, &tp); 1382 if (error) 1383 return error; 1384 1385 xfs_log_sb(tp); 1386 if (wait) 1387 xfs_trans_set_sync(tp); 1388 return xfs_trans_commit(tp); 1389 } 1390 1391 /* 1392 * Update all the secondary superblocks to match the new state of the primary. 1393 * Because we are completely overwriting all the existing fields in the 1394 * secondary superblock buffers, there is no need to read them in from disk. 1395 * Just get a new buffer, stamp it and write it. 1396 * 1397 * The sb buffers need to be cached here so that we serialise against other 1398 * operations that access the secondary superblocks, but we don't want to keep 1399 * them in memory once it is written so we mark it as a one-shot buffer. 1400 */ 1401 int 1402 xfs_update_secondary_sbs( 1403 struct xfs_mount *mp) 1404 { 1405 struct xfs_perag *pag = NULL; 1406 int saved_error = 0; 1407 int error = 0; 1408 LIST_HEAD (buffer_list); 1409 1410 /* update secondary superblocks. */ 1411 while ((pag = xfs_perag_next_from(mp, pag, 1))) { 1412 struct xfs_buf *bp; 1413 1414 error = xfs_buf_get(mp->m_ddev_targp, 1415 XFS_AG_DADDR(mp, pag_agno(pag), XFS_SB_DADDR), 1416 XFS_FSS_TO_BB(mp, 1), &bp); 1417 /* 1418 * If we get an error reading or writing alternate superblocks, 1419 * continue. xfs_repair chooses the "best" superblock based 1420 * on most matches; if we break early, we'll leave more 1421 * superblocks un-updated than updated, and xfs_repair may 1422 * pick them over the properly-updated primary. 1423 */ 1424 if (error) { 1425 xfs_warn(mp, 1426 "error allocating secondary superblock for ag %d", 1427 pag_agno(pag)); 1428 if (!saved_error) 1429 saved_error = error; 1430 continue; 1431 } 1432 1433 bp->b_ops = &xfs_sb_buf_ops; 1434 xfs_buf_oneshot(bp); 1435 xfs_buf_zero(bp, 0, BBTOB(bp->b_length)); 1436 xfs_sb_to_disk(bp->b_addr, &mp->m_sb); 1437 xfs_buf_delwri_queue(bp, &buffer_list); 1438 xfs_buf_relse(bp); 1439 1440 /* don't hold too many buffers at once */ 1441 if (pag_agno(pag) % 16) 1442 continue; 1443 1444 error = xfs_buf_delwri_submit(&buffer_list); 1445 if (error) { 1446 xfs_warn(mp, 1447 "write error %d updating a secondary superblock near ag %d", 1448 error, pag_agno(pag)); 1449 if (!saved_error) 1450 saved_error = error; 1451 continue; 1452 } 1453 } 1454 error = xfs_buf_delwri_submit(&buffer_list); 1455 if (error) 1456 xfs_warn(mp, "error %d writing secondary superblocks", error); 1457 return saved_error ? saved_error : error; 1458 } 1459 1460 /* 1461 * Same behavior as xfs_sync_sb, except that it is always synchronous and it 1462 * also writes the superblock buffer to disk sector 0 immediately. 1463 */ 1464 int 1465 xfs_sync_sb_buf( 1466 struct xfs_mount *mp, 1467 bool update_rtsb) 1468 { 1469 struct xfs_trans *tp; 1470 struct xfs_buf *bp; 1471 struct xfs_buf *rtsb_bp = NULL; 1472 int error; 1473 1474 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_sb, 0, 0, 0, &tp); 1475 if (error) 1476 return error; 1477 1478 bp = xfs_trans_getsb(tp); 1479 xfs_log_sb(tp); 1480 xfs_trans_bhold(tp, bp); 1481 if (update_rtsb) { 1482 rtsb_bp = xfs_log_rtsb(tp, bp); 1483 if (rtsb_bp) 1484 xfs_trans_bhold(tp, rtsb_bp); 1485 } 1486 xfs_trans_set_sync(tp); 1487 error = xfs_trans_commit(tp); 1488 if (error) 1489 goto out; 1490 /* 1491 * write out the sb buffer to get the changes to disk 1492 */ 1493 error = xfs_bwrite(bp); 1494 if (!error && rtsb_bp) 1495 error = xfs_bwrite(rtsb_bp); 1496 out: 1497 if (rtsb_bp) 1498 xfs_buf_relse(rtsb_bp); 1499 xfs_buf_relse(bp); 1500 return error; 1501 } 1502 1503 void 1504 xfs_fs_geometry( 1505 struct xfs_mount *mp, 1506 struct xfs_fsop_geom *geo, 1507 int struct_version) 1508 { 1509 struct xfs_sb *sbp = &mp->m_sb; 1510 1511 memset(geo, 0, sizeof(struct xfs_fsop_geom)); 1512 1513 geo->blocksize = sbp->sb_blocksize; 1514 geo->rtextsize = sbp->sb_rextsize; 1515 geo->agblocks = sbp->sb_agblocks; 1516 geo->agcount = sbp->sb_agcount; 1517 geo->logblocks = sbp->sb_logblocks; 1518 geo->sectsize = sbp->sb_sectsize; 1519 geo->inodesize = sbp->sb_inodesize; 1520 geo->imaxpct = sbp->sb_imax_pct; 1521 geo->datablocks = sbp->sb_dblocks; 1522 geo->rtblocks = sbp->sb_rblocks; 1523 geo->rtextents = sbp->sb_rextents; 1524 geo->logstart = sbp->sb_logstart; 1525 BUILD_BUG_ON(sizeof(geo->uuid) != sizeof(sbp->sb_uuid)); 1526 memcpy(geo->uuid, &sbp->sb_uuid, sizeof(sbp->sb_uuid)); 1527 1528 if (struct_version < 2) 1529 return; 1530 1531 geo->sunit = sbp->sb_unit; 1532 geo->swidth = sbp->sb_width; 1533 1534 if (struct_version < 3) 1535 return; 1536 1537 geo->version = XFS_FSOP_GEOM_VERSION; 1538 geo->flags = XFS_FSOP_GEOM_FLAGS_NLINK | 1539 XFS_FSOP_GEOM_FLAGS_DIRV2 | 1540 XFS_FSOP_GEOM_FLAGS_EXTFLG | 1541 XFS_FSOP_GEOM_FLAGS_ATTR2; 1542 if (xfs_has_attr(mp)) 1543 geo->flags |= XFS_FSOP_GEOM_FLAGS_ATTR; 1544 if (xfs_has_quota(mp)) 1545 geo->flags |= XFS_FSOP_GEOM_FLAGS_QUOTA; 1546 if (xfs_has_align(mp)) 1547 geo->flags |= XFS_FSOP_GEOM_FLAGS_IALIGN; 1548 if (xfs_has_dalign(mp)) 1549 geo->flags |= XFS_FSOP_GEOM_FLAGS_DALIGN; 1550 if (xfs_has_asciici(mp)) 1551 geo->flags |= XFS_FSOP_GEOM_FLAGS_DIRV2CI; 1552 if (xfs_has_lazysbcount(mp)) 1553 geo->flags |= XFS_FSOP_GEOM_FLAGS_LAZYSB; 1554 if (xfs_has_projid32(mp)) 1555 geo->flags |= XFS_FSOP_GEOM_FLAGS_PROJID32; 1556 if (xfs_has_crc(mp)) 1557 geo->flags |= XFS_FSOP_GEOM_FLAGS_V5SB; 1558 if (xfs_has_ftype(mp)) 1559 geo->flags |= XFS_FSOP_GEOM_FLAGS_FTYPE; 1560 if (xfs_has_finobt(mp)) 1561 geo->flags |= XFS_FSOP_GEOM_FLAGS_FINOBT; 1562 if (xfs_has_sparseinodes(mp)) 1563 geo->flags |= XFS_FSOP_GEOM_FLAGS_SPINODES; 1564 if (xfs_has_rmapbt(mp)) 1565 geo->flags |= XFS_FSOP_GEOM_FLAGS_RMAPBT; 1566 if (xfs_has_reflink(mp)) 1567 geo->flags |= XFS_FSOP_GEOM_FLAGS_REFLINK; 1568 if (xfs_has_bigtime(mp)) 1569 geo->flags |= XFS_FSOP_GEOM_FLAGS_BIGTIME; 1570 if (xfs_has_inobtcounts(mp)) 1571 geo->flags |= XFS_FSOP_GEOM_FLAGS_INOBTCNT; 1572 if (xfs_has_parent(mp)) 1573 geo->flags |= XFS_FSOP_GEOM_FLAGS_PARENT; 1574 if (xfs_has_sector(mp)) { 1575 geo->flags |= XFS_FSOP_GEOM_FLAGS_SECTOR; 1576 geo->logsectsize = sbp->sb_logsectsize; 1577 } else { 1578 geo->logsectsize = BBSIZE; 1579 } 1580 if (xfs_has_large_extent_counts(mp)) 1581 geo->flags |= XFS_FSOP_GEOM_FLAGS_NREXT64; 1582 if (xfs_has_exchange_range(mp)) 1583 geo->flags |= XFS_FSOP_GEOM_FLAGS_EXCHANGE_RANGE; 1584 if (xfs_has_metadir(mp)) 1585 geo->flags |= XFS_FSOP_GEOM_FLAGS_METADIR; 1586 if (xfs_has_zoned(mp)) 1587 geo->flags |= XFS_FSOP_GEOM_FLAGS_ZONED; 1588 geo->rtsectsize = sbp->sb_blocksize; 1589 geo->dirblocksize = xfs_dir2_dirblock_bytes(sbp); 1590 1591 if (struct_version < 4) 1592 return; 1593 1594 if (xfs_has_logv2(mp)) 1595 geo->flags |= XFS_FSOP_GEOM_FLAGS_LOGV2; 1596 1597 geo->logsunit = sbp->sb_logsunit; 1598 1599 if (struct_version < 5) 1600 return; 1601 1602 geo->version = XFS_FSOP_GEOM_VERSION_V5; 1603 1604 if (xfs_has_rtgroups(mp)) { 1605 geo->rgcount = sbp->sb_rgcount; 1606 geo->rgextents = sbp->sb_rgextents; 1607 } 1608 if (xfs_has_zoned(mp)) { 1609 geo->rtstart = sbp->sb_rtstart; 1610 geo->rtreserved = sbp->sb_rtreserved; 1611 } 1612 } 1613 1614 /* Read a secondary superblock. */ 1615 int 1616 xfs_sb_read_secondary( 1617 struct xfs_mount *mp, 1618 struct xfs_trans *tp, 1619 xfs_agnumber_t agno, 1620 struct xfs_buf **bpp) 1621 { 1622 struct xfs_buf *bp; 1623 int error; 1624 1625 ASSERT(agno != 0 && agno != NULLAGNUMBER); 1626 error = xfs_trans_read_buf(mp, tp, mp->m_ddev_targp, 1627 XFS_AG_DADDR(mp, agno, XFS_SB_BLOCK(mp)), 1628 XFS_FSS_TO_BB(mp, 1), 0, &bp, &xfs_sb_buf_ops); 1629 if (xfs_metadata_is_sick(error)) 1630 xfs_agno_mark_sick(mp, agno, XFS_SICK_AG_SB); 1631 if (error) 1632 return error; 1633 xfs_buf_set_ref(bp, XFS_SSB_REF); 1634 *bpp = bp; 1635 return 0; 1636 } 1637 1638 /* Get an uninitialised secondary superblock buffer. */ 1639 int 1640 xfs_sb_get_secondary( 1641 struct xfs_mount *mp, 1642 struct xfs_trans *tp, 1643 xfs_agnumber_t agno, 1644 struct xfs_buf **bpp) 1645 { 1646 struct xfs_buf *bp; 1647 int error; 1648 1649 ASSERT(agno != 0 && agno != NULLAGNUMBER); 1650 error = xfs_trans_get_buf(tp, mp->m_ddev_targp, 1651 XFS_AG_DADDR(mp, agno, XFS_SB_BLOCK(mp)), 1652 XFS_FSS_TO_BB(mp, 1), 0, &bp); 1653 if (error) 1654 return error; 1655 bp->b_ops = &xfs_sb_buf_ops; 1656 xfs_buf_oneshot(bp); 1657 *bpp = bp; 1658 return 0; 1659 } 1660 1661 /* 1662 * sunit, swidth, sectorsize(optional with 0) should be all in bytes, so users 1663 * won't be confused by values in error messages. This function returns false 1664 * if the stripe geometry is invalid and the caller is unable to repair the 1665 * stripe configuration later in the mount process. 1666 */ 1667 bool 1668 xfs_validate_stripe_geometry( 1669 struct xfs_mount *mp, 1670 __s64 sunit, 1671 __s64 swidth, 1672 int sectorsize, 1673 bool may_repair, 1674 bool silent) 1675 { 1676 if (swidth > INT_MAX) { 1677 if (!silent) 1678 xfs_notice(mp, 1679 "stripe width (%lld) is too large", swidth); 1680 goto check_override; 1681 } 1682 1683 if (sunit > swidth) { 1684 if (!silent) 1685 xfs_notice(mp, 1686 "stripe unit (%lld) is larger than the stripe width (%lld)", sunit, swidth); 1687 goto check_override; 1688 } 1689 1690 if (sectorsize && (int)sunit % sectorsize) { 1691 if (!silent) 1692 xfs_notice(mp, 1693 "stripe unit (%lld) must be a multiple of the sector size (%d)", 1694 sunit, sectorsize); 1695 goto check_override; 1696 } 1697 1698 if (sunit && !swidth) { 1699 if (!silent) 1700 xfs_notice(mp, 1701 "invalid stripe unit (%lld) and stripe width of 0", sunit); 1702 goto check_override; 1703 } 1704 1705 if (!sunit && swidth) { 1706 if (!silent) 1707 xfs_notice(mp, 1708 "invalid stripe width (%lld) and stripe unit of 0", swidth); 1709 goto check_override; 1710 } 1711 1712 if (sunit && (int)swidth % (int)sunit) { 1713 if (!silent) 1714 xfs_notice(mp, 1715 "stripe width (%lld) must be a multiple of the stripe unit (%lld)", 1716 swidth, sunit); 1717 goto check_override; 1718 } 1719 return true; 1720 1721 check_override: 1722 if (!may_repair) 1723 return false; 1724 /* 1725 * During mount, mp->m_dalign will not be set unless the sunit mount 1726 * option was set. If it was set, ignore the bad stripe alignment values 1727 * and allow the validation and overwrite later in the mount process to 1728 * attempt to overwrite the bad stripe alignment values with the values 1729 * supplied by mount options. 1730 */ 1731 if (!mp->m_dalign) 1732 return false; 1733 if (!silent) 1734 xfs_notice(mp, 1735 "Will try to correct with specified mount options sunit (%d) and swidth (%d)", 1736 BBTOB(mp->m_dalign), BBTOB(mp->m_swidth)); 1737 return true; 1738 } 1739 1740 /* 1741 * Compute the maximum level number of the realtime summary file, as defined by 1742 * mkfs. The historic use of highbit32 on a 64-bit quantity prohibited correct 1743 * use of rt volumes with more than 2^32 extents. 1744 */ 1745 uint8_t 1746 xfs_compute_rextslog( 1747 xfs_rtbxlen_t rtextents) 1748 { 1749 if (!rtextents) 1750 return 0; 1751 return xfs_highbit64(rtextents); 1752 } 1753