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