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_trace.h" 19 #include "xfs_trans.h" 20 #include "xfs_buf_item.h" 21 #include "xfs_bmap_btree.h" 22 #include "xfs_alloc_btree.h" 23 #include "xfs_log.h" 24 #include "xfs_rmap_btree.h" 25 #include "xfs_refcount_btree.h" 26 #include "xfs_da_format.h" 27 #include "xfs_health.h" 28 29 /* 30 * Physical superblock buffer manipulations. Shared with libxfs in userspace. 31 */ 32 33 /* 34 * Reference counting access wrappers to the perag structures. 35 * Because we never free per-ag structures, the only thing we 36 * have to protect against changes is the tree structure itself. 37 */ 38 struct xfs_perag * 39 xfs_perag_get( 40 struct xfs_mount *mp, 41 xfs_agnumber_t agno) 42 { 43 struct xfs_perag *pag; 44 int ref = 0; 45 46 rcu_read_lock(); 47 pag = radix_tree_lookup(&mp->m_perag_tree, agno); 48 if (pag) { 49 ASSERT(atomic_read(&pag->pag_ref) >= 0); 50 ref = atomic_inc_return(&pag->pag_ref); 51 } 52 rcu_read_unlock(); 53 trace_xfs_perag_get(mp, agno, ref, _RET_IP_); 54 return pag; 55 } 56 57 /* 58 * search from @first to find the next perag with the given tag set. 59 */ 60 struct xfs_perag * 61 xfs_perag_get_tag( 62 struct xfs_mount *mp, 63 xfs_agnumber_t first, 64 int tag) 65 { 66 struct xfs_perag *pag; 67 int found; 68 int ref; 69 70 rcu_read_lock(); 71 found = radix_tree_gang_lookup_tag(&mp->m_perag_tree, 72 (void **)&pag, first, 1, tag); 73 if (found <= 0) { 74 rcu_read_unlock(); 75 return NULL; 76 } 77 ref = atomic_inc_return(&pag->pag_ref); 78 rcu_read_unlock(); 79 trace_xfs_perag_get_tag(mp, pag->pag_agno, ref, _RET_IP_); 80 return pag; 81 } 82 83 void 84 xfs_perag_put( 85 struct xfs_perag *pag) 86 { 87 int ref; 88 89 ASSERT(atomic_read(&pag->pag_ref) > 0); 90 ref = atomic_dec_return(&pag->pag_ref); 91 trace_xfs_perag_put(pag->pag_mount, pag->pag_agno, ref, _RET_IP_); 92 } 93 94 /* Check all the superblock fields we care about when reading one in. */ 95 STATIC int 96 xfs_validate_sb_read( 97 struct xfs_mount *mp, 98 struct xfs_sb *sbp) 99 { 100 if (XFS_SB_VERSION_NUM(sbp) != XFS_SB_VERSION_5) 101 return 0; 102 103 /* 104 * Version 5 superblock feature mask validation. Reject combinations 105 * the kernel cannot support up front before checking anything else. 106 */ 107 if (xfs_sb_has_compat_feature(sbp, XFS_SB_FEAT_COMPAT_UNKNOWN)) { 108 xfs_warn(mp, 109 "Superblock has unknown compatible features (0x%x) enabled.", 110 (sbp->sb_features_compat & XFS_SB_FEAT_COMPAT_UNKNOWN)); 111 xfs_warn(mp, 112 "Using a more recent kernel is recommended."); 113 } 114 115 if (xfs_sb_has_ro_compat_feature(sbp, XFS_SB_FEAT_RO_COMPAT_UNKNOWN)) { 116 xfs_alert(mp, 117 "Superblock has unknown read-only compatible features (0x%x) enabled.", 118 (sbp->sb_features_ro_compat & 119 XFS_SB_FEAT_RO_COMPAT_UNKNOWN)); 120 if (!(mp->m_flags & XFS_MOUNT_RDONLY)) { 121 xfs_warn(mp, 122 "Attempted to mount read-only compatible filesystem read-write."); 123 xfs_warn(mp, 124 "Filesystem can only be safely mounted read only."); 125 126 return -EINVAL; 127 } 128 } 129 if (xfs_sb_has_incompat_feature(sbp, XFS_SB_FEAT_INCOMPAT_UNKNOWN)) { 130 xfs_warn(mp, 131 "Superblock has unknown incompatible features (0x%x) enabled.", 132 (sbp->sb_features_incompat & 133 XFS_SB_FEAT_INCOMPAT_UNKNOWN)); 134 xfs_warn(mp, 135 "Filesystem cannot be safely mounted by this kernel."); 136 return -EINVAL; 137 } 138 139 return 0; 140 } 141 142 /* Check all the superblock fields we care about when writing one out. */ 143 STATIC int 144 xfs_validate_sb_write( 145 struct xfs_mount *mp, 146 struct xfs_buf *bp, 147 struct xfs_sb *sbp) 148 { 149 /* 150 * Carry out additional sb summary counter sanity checks when we write 151 * the superblock. We skip this in the read validator because there 152 * could be newer superblocks in the log and if the values are garbage 153 * even after replay we'll recalculate them at the end of log mount. 154 * 155 * mkfs has traditionally written zeroed counters to inprogress and 156 * secondary superblocks, so allow this usage to continue because 157 * we never read counters from such superblocks. 158 */ 159 if (XFS_BUF_ADDR(bp) == XFS_SB_DADDR && !sbp->sb_inprogress && 160 (sbp->sb_fdblocks > sbp->sb_dblocks || 161 !xfs_verify_icount(mp, sbp->sb_icount) || 162 sbp->sb_ifree > sbp->sb_icount)) { 163 xfs_warn(mp, "SB summary counter sanity check failed"); 164 return -EFSCORRUPTED; 165 } 166 167 if (XFS_SB_VERSION_NUM(sbp) != XFS_SB_VERSION_5) 168 return 0; 169 170 /* 171 * Version 5 superblock feature mask validation. Reject combinations 172 * the kernel cannot support since we checked for unsupported bits in 173 * the read verifier, which means that memory is corrupt. 174 */ 175 if (xfs_sb_has_compat_feature(sbp, XFS_SB_FEAT_COMPAT_UNKNOWN)) { 176 xfs_warn(mp, 177 "Corruption detected in superblock compatible features (0x%x)!", 178 (sbp->sb_features_compat & XFS_SB_FEAT_COMPAT_UNKNOWN)); 179 return -EFSCORRUPTED; 180 } 181 182 if (xfs_sb_has_ro_compat_feature(sbp, XFS_SB_FEAT_RO_COMPAT_UNKNOWN)) { 183 xfs_alert(mp, 184 "Corruption detected in superblock read-only compatible features (0x%x)!", 185 (sbp->sb_features_ro_compat & 186 XFS_SB_FEAT_RO_COMPAT_UNKNOWN)); 187 return -EFSCORRUPTED; 188 } 189 if (xfs_sb_has_incompat_feature(sbp, XFS_SB_FEAT_INCOMPAT_UNKNOWN)) { 190 xfs_warn(mp, 191 "Corruption detected in superblock incompatible features (0x%x)!", 192 (sbp->sb_features_incompat & 193 XFS_SB_FEAT_INCOMPAT_UNKNOWN)); 194 return -EFSCORRUPTED; 195 } 196 if (xfs_sb_has_incompat_log_feature(sbp, 197 XFS_SB_FEAT_INCOMPAT_LOG_UNKNOWN)) { 198 xfs_warn(mp, 199 "Corruption detected in superblock incompatible log features (0x%x)!", 200 (sbp->sb_features_log_incompat & 201 XFS_SB_FEAT_INCOMPAT_LOG_UNKNOWN)); 202 return -EFSCORRUPTED; 203 } 204 205 /* 206 * We can't read verify the sb LSN because the read verifier is called 207 * before the log is allocated and processed. We know the log is set up 208 * before write verifier calls, so check it here. 209 */ 210 if (!xfs_log_check_lsn(mp, sbp->sb_lsn)) 211 return -EFSCORRUPTED; 212 213 return 0; 214 } 215 216 /* Check the validity of the SB. */ 217 STATIC int 218 xfs_validate_sb_common( 219 struct xfs_mount *mp, 220 struct xfs_buf *bp, 221 struct xfs_sb *sbp) 222 { 223 struct xfs_dsb *dsb = bp->b_addr; 224 uint32_t agcount = 0; 225 uint32_t rem; 226 227 if (!xfs_verify_magic(bp, dsb->sb_magicnum)) { 228 xfs_warn(mp, "bad magic number"); 229 return -EWRONGFS; 230 } 231 232 if (!xfs_sb_good_version(sbp)) { 233 xfs_warn(mp, "bad version"); 234 return -EWRONGFS; 235 } 236 237 if (xfs_sb_version_has_pquotino(sbp)) { 238 if (sbp->sb_qflags & (XFS_OQUOTA_ENFD | XFS_OQUOTA_CHKD)) { 239 xfs_notice(mp, 240 "Version 5 of Super block has XFS_OQUOTA bits."); 241 return -EFSCORRUPTED; 242 } 243 } else if (sbp->sb_qflags & (XFS_PQUOTA_ENFD | XFS_GQUOTA_ENFD | 244 XFS_PQUOTA_CHKD | XFS_GQUOTA_CHKD)) { 245 xfs_notice(mp, 246 "Superblock earlier than Version 5 has XFS_{P|G}QUOTA_{ENFD|CHKD} bits."); 247 return -EFSCORRUPTED; 248 } 249 250 /* 251 * Full inode chunks must be aligned to inode chunk size when 252 * sparse inodes are enabled to support the sparse chunk 253 * allocation algorithm and prevent overlapping inode records. 254 */ 255 if (xfs_sb_version_hassparseinodes(sbp)) { 256 uint32_t align; 257 258 align = XFS_INODES_PER_CHUNK * sbp->sb_inodesize 259 >> sbp->sb_blocklog; 260 if (sbp->sb_inoalignmt != align) { 261 xfs_warn(mp, 262 "Inode block alignment (%u) must match chunk size (%u) for sparse inodes.", 263 sbp->sb_inoalignmt, align); 264 return -EINVAL; 265 } 266 } 267 268 if (unlikely( 269 sbp->sb_logstart == 0 && mp->m_logdev_targp == mp->m_ddev_targp)) { 270 xfs_warn(mp, 271 "filesystem is marked as having an external log; " 272 "specify logdev on the mount command line."); 273 return -EINVAL; 274 } 275 276 if (unlikely( 277 sbp->sb_logstart != 0 && mp->m_logdev_targp != mp->m_ddev_targp)) { 278 xfs_warn(mp, 279 "filesystem is marked as having an internal log; " 280 "do not specify logdev on the mount command line."); 281 return -EINVAL; 282 } 283 284 /* Compute agcount for this number of dblocks and agblocks */ 285 if (sbp->sb_agblocks) { 286 agcount = div_u64_rem(sbp->sb_dblocks, sbp->sb_agblocks, &rem); 287 if (rem) 288 agcount++; 289 } 290 291 /* 292 * More sanity checking. Most of these were stolen directly from 293 * xfs_repair. 294 */ 295 if (unlikely( 296 sbp->sb_agcount <= 0 || 297 sbp->sb_sectsize < XFS_MIN_SECTORSIZE || 298 sbp->sb_sectsize > XFS_MAX_SECTORSIZE || 299 sbp->sb_sectlog < XFS_MIN_SECTORSIZE_LOG || 300 sbp->sb_sectlog > XFS_MAX_SECTORSIZE_LOG || 301 sbp->sb_sectsize != (1 << sbp->sb_sectlog) || 302 sbp->sb_blocksize < XFS_MIN_BLOCKSIZE || 303 sbp->sb_blocksize > XFS_MAX_BLOCKSIZE || 304 sbp->sb_blocklog < XFS_MIN_BLOCKSIZE_LOG || 305 sbp->sb_blocklog > XFS_MAX_BLOCKSIZE_LOG || 306 sbp->sb_blocksize != (1 << sbp->sb_blocklog) || 307 sbp->sb_dirblklog + sbp->sb_blocklog > XFS_MAX_BLOCKSIZE_LOG || 308 sbp->sb_inodesize < XFS_DINODE_MIN_SIZE || 309 sbp->sb_inodesize > XFS_DINODE_MAX_SIZE || 310 sbp->sb_inodelog < XFS_DINODE_MIN_LOG || 311 sbp->sb_inodelog > XFS_DINODE_MAX_LOG || 312 sbp->sb_inodesize != (1 << sbp->sb_inodelog) || 313 sbp->sb_logsunit > XLOG_MAX_RECORD_BSIZE || 314 sbp->sb_inopblock != howmany(sbp->sb_blocksize,sbp->sb_inodesize) || 315 XFS_FSB_TO_B(mp, sbp->sb_agblocks) < XFS_MIN_AG_BYTES || 316 XFS_FSB_TO_B(mp, sbp->sb_agblocks) > XFS_MAX_AG_BYTES || 317 sbp->sb_agblklog != xfs_highbit32(sbp->sb_agblocks - 1) + 1 || 318 agcount == 0 || agcount != sbp->sb_agcount || 319 (sbp->sb_blocklog - sbp->sb_inodelog != sbp->sb_inopblog) || 320 (sbp->sb_rextsize * sbp->sb_blocksize > XFS_MAX_RTEXTSIZE) || 321 (sbp->sb_rextsize * sbp->sb_blocksize < XFS_MIN_RTEXTSIZE) || 322 (sbp->sb_imax_pct > 100 /* zero sb_imax_pct is valid */) || 323 sbp->sb_dblocks == 0 || 324 sbp->sb_dblocks > XFS_MAX_DBLOCKS(sbp) || 325 sbp->sb_dblocks < XFS_MIN_DBLOCKS(sbp) || 326 sbp->sb_shared_vn != 0)) { 327 xfs_notice(mp, "SB sanity check failed"); 328 return -EFSCORRUPTED; 329 } 330 331 /* Validate the realtime geometry; stolen from xfs_repair */ 332 if (sbp->sb_rextsize * sbp->sb_blocksize > XFS_MAX_RTEXTSIZE || 333 sbp->sb_rextsize * sbp->sb_blocksize < XFS_MIN_RTEXTSIZE) { 334 xfs_notice(mp, 335 "realtime extent sanity check failed"); 336 return -EFSCORRUPTED; 337 } 338 339 if (sbp->sb_rblocks == 0) { 340 if (sbp->sb_rextents != 0 || sbp->sb_rbmblocks != 0 || 341 sbp->sb_rextslog != 0 || sbp->sb_frextents != 0) { 342 xfs_notice(mp, 343 "realtime zeroed geometry check failed"); 344 return -EFSCORRUPTED; 345 } 346 } else { 347 uint64_t rexts; 348 uint64_t rbmblocks; 349 350 rexts = div_u64(sbp->sb_rblocks, sbp->sb_rextsize); 351 rbmblocks = howmany_64(sbp->sb_rextents, 352 NBBY * sbp->sb_blocksize); 353 354 if (sbp->sb_rextents != rexts || 355 sbp->sb_rextslog != xfs_highbit32(sbp->sb_rextents) || 356 sbp->sb_rbmblocks != rbmblocks) { 357 xfs_notice(mp, 358 "realtime geometry sanity check failed"); 359 return -EFSCORRUPTED; 360 } 361 } 362 363 /* 364 * Either (sb_unit and !hasdalign) or (!sb_unit and hasdalign) 365 * would imply the image is corrupted. 366 */ 367 if (!!sbp->sb_unit ^ xfs_sb_version_hasdalign(sbp)) { 368 xfs_notice(mp, "SB stripe alignment sanity check failed"); 369 return -EFSCORRUPTED; 370 } 371 372 if (!xfs_validate_stripe_geometry(mp, XFS_FSB_TO_B(mp, sbp->sb_unit), 373 XFS_FSB_TO_B(mp, sbp->sb_width), 0, false)) 374 return -EFSCORRUPTED; 375 376 if (xfs_sb_version_hascrc(&mp->m_sb) && 377 sbp->sb_blocksize < XFS_MIN_CRC_BLOCKSIZE) { 378 xfs_notice(mp, "v5 SB sanity check failed"); 379 return -EFSCORRUPTED; 380 } 381 382 /* 383 * Currently only very few inode sizes are supported. 384 */ 385 switch (sbp->sb_inodesize) { 386 case 256: 387 case 512: 388 case 1024: 389 case 2048: 390 break; 391 default: 392 xfs_warn(mp, "inode size of %d bytes not supported", 393 sbp->sb_inodesize); 394 return -ENOSYS; 395 } 396 397 return 0; 398 } 399 400 void 401 xfs_sb_quota_from_disk(struct xfs_sb *sbp) 402 { 403 /* 404 * older mkfs doesn't initialize quota inodes to NULLFSINO. This 405 * leads to in-core values having two different values for a quota 406 * inode to be invalid: 0 and NULLFSINO. Change it to a single value 407 * NULLFSINO. 408 * 409 * Note that this change affect only the in-core values. These 410 * values are not written back to disk unless any quota information 411 * is written to the disk. Even in that case, sb_pquotino field is 412 * not written to disk unless the superblock supports pquotino. 413 */ 414 if (sbp->sb_uquotino == 0) 415 sbp->sb_uquotino = NULLFSINO; 416 if (sbp->sb_gquotino == 0) 417 sbp->sb_gquotino = NULLFSINO; 418 if (sbp->sb_pquotino == 0) 419 sbp->sb_pquotino = NULLFSINO; 420 421 /* 422 * We need to do these manipilations only if we are working 423 * with an older version of on-disk superblock. 424 */ 425 if (xfs_sb_version_has_pquotino(sbp)) 426 return; 427 428 if (sbp->sb_qflags & XFS_OQUOTA_ENFD) 429 sbp->sb_qflags |= (sbp->sb_qflags & XFS_PQUOTA_ACCT) ? 430 XFS_PQUOTA_ENFD : XFS_GQUOTA_ENFD; 431 if (sbp->sb_qflags & XFS_OQUOTA_CHKD) 432 sbp->sb_qflags |= (sbp->sb_qflags & XFS_PQUOTA_ACCT) ? 433 XFS_PQUOTA_CHKD : XFS_GQUOTA_CHKD; 434 sbp->sb_qflags &= ~(XFS_OQUOTA_ENFD | XFS_OQUOTA_CHKD); 435 436 if (sbp->sb_qflags & XFS_PQUOTA_ACCT && 437 sbp->sb_gquotino != NULLFSINO) { 438 /* 439 * In older version of superblock, on-disk superblock only 440 * has sb_gquotino, and in-core superblock has both sb_gquotino 441 * and sb_pquotino. But, only one of them is supported at any 442 * point of time. So, if PQUOTA is set in disk superblock, 443 * copy over sb_gquotino to sb_pquotino. The NULLFSINO test 444 * above is to make sure we don't do this twice and wipe them 445 * both out! 446 */ 447 sbp->sb_pquotino = sbp->sb_gquotino; 448 sbp->sb_gquotino = NULLFSINO; 449 } 450 } 451 452 static void 453 __xfs_sb_from_disk( 454 struct xfs_sb *to, 455 xfs_dsb_t *from, 456 bool convert_xquota) 457 { 458 to->sb_magicnum = be32_to_cpu(from->sb_magicnum); 459 to->sb_blocksize = be32_to_cpu(from->sb_blocksize); 460 to->sb_dblocks = be64_to_cpu(from->sb_dblocks); 461 to->sb_rblocks = be64_to_cpu(from->sb_rblocks); 462 to->sb_rextents = be64_to_cpu(from->sb_rextents); 463 memcpy(&to->sb_uuid, &from->sb_uuid, sizeof(to->sb_uuid)); 464 to->sb_logstart = be64_to_cpu(from->sb_logstart); 465 to->sb_rootino = be64_to_cpu(from->sb_rootino); 466 to->sb_rbmino = be64_to_cpu(from->sb_rbmino); 467 to->sb_rsumino = be64_to_cpu(from->sb_rsumino); 468 to->sb_rextsize = be32_to_cpu(from->sb_rextsize); 469 to->sb_agblocks = be32_to_cpu(from->sb_agblocks); 470 to->sb_agcount = be32_to_cpu(from->sb_agcount); 471 to->sb_rbmblocks = be32_to_cpu(from->sb_rbmblocks); 472 to->sb_logblocks = be32_to_cpu(from->sb_logblocks); 473 to->sb_versionnum = be16_to_cpu(from->sb_versionnum); 474 to->sb_sectsize = be16_to_cpu(from->sb_sectsize); 475 to->sb_inodesize = be16_to_cpu(from->sb_inodesize); 476 to->sb_inopblock = be16_to_cpu(from->sb_inopblock); 477 memcpy(&to->sb_fname, &from->sb_fname, sizeof(to->sb_fname)); 478 to->sb_blocklog = from->sb_blocklog; 479 to->sb_sectlog = from->sb_sectlog; 480 to->sb_inodelog = from->sb_inodelog; 481 to->sb_inopblog = from->sb_inopblog; 482 to->sb_agblklog = from->sb_agblklog; 483 to->sb_rextslog = from->sb_rextslog; 484 to->sb_inprogress = from->sb_inprogress; 485 to->sb_imax_pct = from->sb_imax_pct; 486 to->sb_icount = be64_to_cpu(from->sb_icount); 487 to->sb_ifree = be64_to_cpu(from->sb_ifree); 488 to->sb_fdblocks = be64_to_cpu(from->sb_fdblocks); 489 to->sb_frextents = be64_to_cpu(from->sb_frextents); 490 to->sb_uquotino = be64_to_cpu(from->sb_uquotino); 491 to->sb_gquotino = be64_to_cpu(from->sb_gquotino); 492 to->sb_qflags = be16_to_cpu(from->sb_qflags); 493 to->sb_flags = from->sb_flags; 494 to->sb_shared_vn = from->sb_shared_vn; 495 to->sb_inoalignmt = be32_to_cpu(from->sb_inoalignmt); 496 to->sb_unit = be32_to_cpu(from->sb_unit); 497 to->sb_width = be32_to_cpu(from->sb_width); 498 to->sb_dirblklog = from->sb_dirblklog; 499 to->sb_logsectlog = from->sb_logsectlog; 500 to->sb_logsectsize = be16_to_cpu(from->sb_logsectsize); 501 to->sb_logsunit = be32_to_cpu(from->sb_logsunit); 502 to->sb_features2 = be32_to_cpu(from->sb_features2); 503 to->sb_bad_features2 = be32_to_cpu(from->sb_bad_features2); 504 to->sb_features_compat = be32_to_cpu(from->sb_features_compat); 505 to->sb_features_ro_compat = be32_to_cpu(from->sb_features_ro_compat); 506 to->sb_features_incompat = be32_to_cpu(from->sb_features_incompat); 507 to->sb_features_log_incompat = 508 be32_to_cpu(from->sb_features_log_incompat); 509 /* crc is only used on disk, not in memory; just init to 0 here. */ 510 to->sb_crc = 0; 511 to->sb_spino_align = be32_to_cpu(from->sb_spino_align); 512 to->sb_pquotino = be64_to_cpu(from->sb_pquotino); 513 to->sb_lsn = be64_to_cpu(from->sb_lsn); 514 /* 515 * sb_meta_uuid is only on disk if it differs from sb_uuid and the 516 * feature flag is set; if not set we keep it only in memory. 517 */ 518 if (xfs_sb_version_hasmetauuid(to)) 519 uuid_copy(&to->sb_meta_uuid, &from->sb_meta_uuid); 520 else 521 uuid_copy(&to->sb_meta_uuid, &from->sb_uuid); 522 /* Convert on-disk flags to in-memory flags? */ 523 if (convert_xquota) 524 xfs_sb_quota_from_disk(to); 525 } 526 527 void 528 xfs_sb_from_disk( 529 struct xfs_sb *to, 530 xfs_dsb_t *from) 531 { 532 __xfs_sb_from_disk(to, from, true); 533 } 534 535 static void 536 xfs_sb_quota_to_disk( 537 struct xfs_dsb *to, 538 struct xfs_sb *from) 539 { 540 uint16_t qflags = from->sb_qflags; 541 542 to->sb_uquotino = cpu_to_be64(from->sb_uquotino); 543 if (xfs_sb_version_has_pquotino(from)) { 544 to->sb_qflags = cpu_to_be16(from->sb_qflags); 545 to->sb_gquotino = cpu_to_be64(from->sb_gquotino); 546 to->sb_pquotino = cpu_to_be64(from->sb_pquotino); 547 return; 548 } 549 550 /* 551 * The in-core version of sb_qflags do not have XFS_OQUOTA_* 552 * flags, whereas the on-disk version does. So, convert incore 553 * XFS_{PG}QUOTA_* flags to on-disk XFS_OQUOTA_* flags. 554 */ 555 qflags &= ~(XFS_PQUOTA_ENFD | XFS_PQUOTA_CHKD | 556 XFS_GQUOTA_ENFD | XFS_GQUOTA_CHKD); 557 558 if (from->sb_qflags & 559 (XFS_PQUOTA_ENFD | XFS_GQUOTA_ENFD)) 560 qflags |= XFS_OQUOTA_ENFD; 561 if (from->sb_qflags & 562 (XFS_PQUOTA_CHKD | XFS_GQUOTA_CHKD)) 563 qflags |= XFS_OQUOTA_CHKD; 564 to->sb_qflags = cpu_to_be16(qflags); 565 566 /* 567 * GQUOTINO and PQUOTINO cannot be used together in versions 568 * of superblock that do not have pquotino. from->sb_flags 569 * tells us which quota is active and should be copied to 570 * disk. If neither are active, we should NULL the inode. 571 * 572 * In all cases, the separate pquotino must remain 0 because it 573 * is beyond the "end" of the valid non-pquotino superblock. 574 */ 575 if (from->sb_qflags & XFS_GQUOTA_ACCT) 576 to->sb_gquotino = cpu_to_be64(from->sb_gquotino); 577 else if (from->sb_qflags & XFS_PQUOTA_ACCT) 578 to->sb_gquotino = cpu_to_be64(from->sb_pquotino); 579 else { 580 /* 581 * We can't rely on just the fields being logged to tell us 582 * that it is safe to write NULLFSINO - we should only do that 583 * if quotas are not actually enabled. Hence only write 584 * NULLFSINO if both in-core quota inodes are NULL. 585 */ 586 if (from->sb_gquotino == NULLFSINO && 587 from->sb_pquotino == NULLFSINO) 588 to->sb_gquotino = cpu_to_be64(NULLFSINO); 589 } 590 591 to->sb_pquotino = 0; 592 } 593 594 void 595 xfs_sb_to_disk( 596 struct xfs_dsb *to, 597 struct xfs_sb *from) 598 { 599 xfs_sb_quota_to_disk(to, from); 600 601 to->sb_magicnum = cpu_to_be32(from->sb_magicnum); 602 to->sb_blocksize = cpu_to_be32(from->sb_blocksize); 603 to->sb_dblocks = cpu_to_be64(from->sb_dblocks); 604 to->sb_rblocks = cpu_to_be64(from->sb_rblocks); 605 to->sb_rextents = cpu_to_be64(from->sb_rextents); 606 memcpy(&to->sb_uuid, &from->sb_uuid, sizeof(to->sb_uuid)); 607 to->sb_logstart = cpu_to_be64(from->sb_logstart); 608 to->sb_rootino = cpu_to_be64(from->sb_rootino); 609 to->sb_rbmino = cpu_to_be64(from->sb_rbmino); 610 to->sb_rsumino = cpu_to_be64(from->sb_rsumino); 611 to->sb_rextsize = cpu_to_be32(from->sb_rextsize); 612 to->sb_agblocks = cpu_to_be32(from->sb_agblocks); 613 to->sb_agcount = cpu_to_be32(from->sb_agcount); 614 to->sb_rbmblocks = cpu_to_be32(from->sb_rbmblocks); 615 to->sb_logblocks = cpu_to_be32(from->sb_logblocks); 616 to->sb_versionnum = cpu_to_be16(from->sb_versionnum); 617 to->sb_sectsize = cpu_to_be16(from->sb_sectsize); 618 to->sb_inodesize = cpu_to_be16(from->sb_inodesize); 619 to->sb_inopblock = cpu_to_be16(from->sb_inopblock); 620 memcpy(&to->sb_fname, &from->sb_fname, sizeof(to->sb_fname)); 621 to->sb_blocklog = from->sb_blocklog; 622 to->sb_sectlog = from->sb_sectlog; 623 to->sb_inodelog = from->sb_inodelog; 624 to->sb_inopblog = from->sb_inopblog; 625 to->sb_agblklog = from->sb_agblklog; 626 to->sb_rextslog = from->sb_rextslog; 627 to->sb_inprogress = from->sb_inprogress; 628 to->sb_imax_pct = from->sb_imax_pct; 629 to->sb_icount = cpu_to_be64(from->sb_icount); 630 to->sb_ifree = cpu_to_be64(from->sb_ifree); 631 to->sb_fdblocks = cpu_to_be64(from->sb_fdblocks); 632 to->sb_frextents = cpu_to_be64(from->sb_frextents); 633 634 to->sb_flags = from->sb_flags; 635 to->sb_shared_vn = from->sb_shared_vn; 636 to->sb_inoalignmt = cpu_to_be32(from->sb_inoalignmt); 637 to->sb_unit = cpu_to_be32(from->sb_unit); 638 to->sb_width = cpu_to_be32(from->sb_width); 639 to->sb_dirblklog = from->sb_dirblklog; 640 to->sb_logsectlog = from->sb_logsectlog; 641 to->sb_logsectsize = cpu_to_be16(from->sb_logsectsize); 642 to->sb_logsunit = cpu_to_be32(from->sb_logsunit); 643 644 /* 645 * We need to ensure that bad_features2 always matches features2. 646 * Hence we enforce that here rather than having to remember to do it 647 * everywhere else that updates features2. 648 */ 649 from->sb_bad_features2 = from->sb_features2; 650 to->sb_features2 = cpu_to_be32(from->sb_features2); 651 to->sb_bad_features2 = cpu_to_be32(from->sb_bad_features2); 652 653 if (xfs_sb_version_hascrc(from)) { 654 to->sb_features_compat = cpu_to_be32(from->sb_features_compat); 655 to->sb_features_ro_compat = 656 cpu_to_be32(from->sb_features_ro_compat); 657 to->sb_features_incompat = 658 cpu_to_be32(from->sb_features_incompat); 659 to->sb_features_log_incompat = 660 cpu_to_be32(from->sb_features_log_incompat); 661 to->sb_spino_align = cpu_to_be32(from->sb_spino_align); 662 to->sb_lsn = cpu_to_be64(from->sb_lsn); 663 if (xfs_sb_version_hasmetauuid(from)) 664 uuid_copy(&to->sb_meta_uuid, &from->sb_meta_uuid); 665 } 666 } 667 668 /* 669 * If the superblock has the CRC feature bit set or the CRC field is non-null, 670 * check that the CRC is valid. We check the CRC field is non-null because a 671 * single bit error could clear the feature bit and unused parts of the 672 * superblock are supposed to be zero. Hence a non-null crc field indicates that 673 * we've potentially lost a feature bit and we should check it anyway. 674 * 675 * However, past bugs (i.e. in growfs) left non-zeroed regions beyond the 676 * last field in V4 secondary superblocks. So for secondary superblocks, 677 * we are more forgiving, and ignore CRC failures if the primary doesn't 678 * indicate that the fs version is V5. 679 */ 680 static void 681 xfs_sb_read_verify( 682 struct xfs_buf *bp) 683 { 684 struct xfs_sb sb; 685 struct xfs_mount *mp = bp->b_mount; 686 struct xfs_dsb *dsb = bp->b_addr; 687 int error; 688 689 /* 690 * open code the version check to avoid needing to convert the entire 691 * superblock from disk order just to check the version number 692 */ 693 if (dsb->sb_magicnum == cpu_to_be32(XFS_SB_MAGIC) && 694 (((be16_to_cpu(dsb->sb_versionnum) & XFS_SB_VERSION_NUMBITS) == 695 XFS_SB_VERSION_5) || 696 dsb->sb_crc != 0)) { 697 698 if (!xfs_buf_verify_cksum(bp, XFS_SB_CRC_OFF)) { 699 /* Only fail bad secondaries on a known V5 filesystem */ 700 if (bp->b_bn == XFS_SB_DADDR || 701 xfs_sb_version_hascrc(&mp->m_sb)) { 702 error = -EFSBADCRC; 703 goto out_error; 704 } 705 } 706 } 707 708 /* 709 * Check all the superblock fields. Don't byteswap the xquota flags 710 * because _verify_common checks the on-disk values. 711 */ 712 __xfs_sb_from_disk(&sb, dsb, false); 713 error = xfs_validate_sb_common(mp, bp, &sb); 714 if (error) 715 goto out_error; 716 error = xfs_validate_sb_read(mp, &sb); 717 718 out_error: 719 if (error == -EFSCORRUPTED || error == -EFSBADCRC) 720 xfs_verifier_error(bp, error, __this_address); 721 else if (error) 722 xfs_buf_ioerror(bp, error); 723 } 724 725 /* 726 * We may be probed for a filesystem match, so we may not want to emit 727 * messages when the superblock buffer is not actually an XFS superblock. 728 * If we find an XFS superblock, then run a normal, noisy mount because we are 729 * really going to mount it and want to know about errors. 730 */ 731 static void 732 xfs_sb_quiet_read_verify( 733 struct xfs_buf *bp) 734 { 735 struct xfs_dsb *dsb = bp->b_addr; 736 737 if (dsb->sb_magicnum == cpu_to_be32(XFS_SB_MAGIC)) { 738 /* XFS filesystem, verify noisily! */ 739 xfs_sb_read_verify(bp); 740 return; 741 } 742 /* quietly fail */ 743 xfs_buf_ioerror(bp, -EWRONGFS); 744 } 745 746 static void 747 xfs_sb_write_verify( 748 struct xfs_buf *bp) 749 { 750 struct xfs_sb sb; 751 struct xfs_mount *mp = bp->b_mount; 752 struct xfs_buf_log_item *bip = bp->b_log_item; 753 struct xfs_dsb *dsb = bp->b_addr; 754 int error; 755 756 /* 757 * Check all the superblock fields. Don't byteswap the xquota flags 758 * because _verify_common checks the on-disk values. 759 */ 760 __xfs_sb_from_disk(&sb, dsb, false); 761 error = xfs_validate_sb_common(mp, bp, &sb); 762 if (error) 763 goto out_error; 764 error = xfs_validate_sb_write(mp, bp, &sb); 765 if (error) 766 goto out_error; 767 768 if (!xfs_sb_version_hascrc(&mp->m_sb)) 769 return; 770 771 if (bip) 772 dsb->sb_lsn = cpu_to_be64(bip->bli_item.li_lsn); 773 774 xfs_buf_update_cksum(bp, XFS_SB_CRC_OFF); 775 return; 776 777 out_error: 778 xfs_verifier_error(bp, error, __this_address); 779 } 780 781 const struct xfs_buf_ops xfs_sb_buf_ops = { 782 .name = "xfs_sb", 783 .magic = { cpu_to_be32(XFS_SB_MAGIC), cpu_to_be32(XFS_SB_MAGIC) }, 784 .verify_read = xfs_sb_read_verify, 785 .verify_write = xfs_sb_write_verify, 786 }; 787 788 const struct xfs_buf_ops xfs_sb_quiet_buf_ops = { 789 .name = "xfs_sb_quiet", 790 .magic = { cpu_to_be32(XFS_SB_MAGIC), cpu_to_be32(XFS_SB_MAGIC) }, 791 .verify_read = xfs_sb_quiet_read_verify, 792 .verify_write = xfs_sb_write_verify, 793 }; 794 795 /* 796 * xfs_mount_common 797 * 798 * Mount initialization code establishing various mount 799 * fields from the superblock associated with the given 800 * mount structure. 801 * 802 * Inode geometry are calculated in xfs_ialloc_setup_geometry. 803 */ 804 void 805 xfs_sb_mount_common( 806 struct xfs_mount *mp, 807 struct xfs_sb *sbp) 808 { 809 mp->m_agfrotor = mp->m_agirotor = 0; 810 mp->m_maxagi = mp->m_sb.sb_agcount; 811 mp->m_blkbit_log = sbp->sb_blocklog + XFS_NBBYLOG; 812 mp->m_blkbb_log = sbp->sb_blocklog - BBSHIFT; 813 mp->m_sectbb_log = sbp->sb_sectlog - BBSHIFT; 814 mp->m_agno_log = xfs_highbit32(sbp->sb_agcount - 1) + 1; 815 mp->m_blockmask = sbp->sb_blocksize - 1; 816 mp->m_blockwsize = sbp->sb_blocksize >> XFS_WORDLOG; 817 mp->m_blockwmask = mp->m_blockwsize - 1; 818 819 mp->m_alloc_mxr[0] = xfs_allocbt_maxrecs(mp, sbp->sb_blocksize, 1); 820 mp->m_alloc_mxr[1] = xfs_allocbt_maxrecs(mp, sbp->sb_blocksize, 0); 821 mp->m_alloc_mnr[0] = mp->m_alloc_mxr[0] / 2; 822 mp->m_alloc_mnr[1] = mp->m_alloc_mxr[1] / 2; 823 824 mp->m_bmap_dmxr[0] = xfs_bmbt_maxrecs(mp, sbp->sb_blocksize, 1); 825 mp->m_bmap_dmxr[1] = xfs_bmbt_maxrecs(mp, sbp->sb_blocksize, 0); 826 mp->m_bmap_dmnr[0] = mp->m_bmap_dmxr[0] / 2; 827 mp->m_bmap_dmnr[1] = mp->m_bmap_dmxr[1] / 2; 828 829 mp->m_rmap_mxr[0] = xfs_rmapbt_maxrecs(sbp->sb_blocksize, 1); 830 mp->m_rmap_mxr[1] = xfs_rmapbt_maxrecs(sbp->sb_blocksize, 0); 831 mp->m_rmap_mnr[0] = mp->m_rmap_mxr[0] / 2; 832 mp->m_rmap_mnr[1] = mp->m_rmap_mxr[1] / 2; 833 834 mp->m_refc_mxr[0] = xfs_refcountbt_maxrecs(sbp->sb_blocksize, true); 835 mp->m_refc_mxr[1] = xfs_refcountbt_maxrecs(sbp->sb_blocksize, false); 836 mp->m_refc_mnr[0] = mp->m_refc_mxr[0] / 2; 837 mp->m_refc_mnr[1] = mp->m_refc_mxr[1] / 2; 838 839 mp->m_bsize = XFS_FSB_TO_BB(mp, 1); 840 mp->m_alloc_set_aside = xfs_alloc_set_aside(mp); 841 mp->m_ag_max_usable = xfs_alloc_ag_max_usable(mp); 842 } 843 844 /* 845 * xfs_initialize_perag_data 846 * 847 * Read in each per-ag structure so we can count up the number of 848 * allocated inodes, free inodes and used filesystem blocks as this 849 * information is no longer persistent in the superblock. Once we have 850 * this information, write it into the in-core superblock structure. 851 */ 852 int 853 xfs_initialize_perag_data( 854 struct xfs_mount *mp, 855 xfs_agnumber_t agcount) 856 { 857 xfs_agnumber_t index; 858 xfs_perag_t *pag; 859 xfs_sb_t *sbp = &mp->m_sb; 860 uint64_t ifree = 0; 861 uint64_t ialloc = 0; 862 uint64_t bfree = 0; 863 uint64_t bfreelst = 0; 864 uint64_t btree = 0; 865 uint64_t fdblocks; 866 int error = 0; 867 868 for (index = 0; index < agcount; index++) { 869 /* 870 * read the agf, then the agi. This gets us 871 * all the information we need and populates the 872 * per-ag structures for us. 873 */ 874 error = xfs_alloc_pagf_init(mp, NULL, index, 0); 875 if (error) 876 return error; 877 878 error = xfs_ialloc_pagi_init(mp, NULL, index); 879 if (error) 880 return error; 881 pag = xfs_perag_get(mp, index); 882 ifree += pag->pagi_freecount; 883 ialloc += pag->pagi_count; 884 bfree += pag->pagf_freeblks; 885 bfreelst += pag->pagf_flcount; 886 btree += pag->pagf_btreeblks; 887 xfs_perag_put(pag); 888 } 889 fdblocks = bfree + bfreelst + btree; 890 891 /* 892 * If the new summary counts are obviously incorrect, fail the 893 * mount operation because that implies the AGFs are also corrupt. 894 * Clear FS_COUNTERS so that we don't unmount with a dirty log, which 895 * will prevent xfs_repair from fixing anything. 896 */ 897 if (fdblocks > sbp->sb_dblocks || ifree > ialloc) { 898 xfs_alert(mp, "AGF corruption. Please run xfs_repair."); 899 error = -EFSCORRUPTED; 900 goto out; 901 } 902 903 /* Overwrite incore superblock counters with just-read data */ 904 spin_lock(&mp->m_sb_lock); 905 sbp->sb_ifree = ifree; 906 sbp->sb_icount = ialloc; 907 sbp->sb_fdblocks = fdblocks; 908 spin_unlock(&mp->m_sb_lock); 909 910 xfs_reinit_percpu_counters(mp); 911 out: 912 xfs_fs_mark_healthy(mp, XFS_SICK_FS_COUNTERS); 913 return error; 914 } 915 916 /* 917 * xfs_log_sb() can be used to copy arbitrary changes to the in-core superblock 918 * into the superblock buffer to be logged. It does not provide the higher 919 * level of locking that is needed to protect the in-core superblock from 920 * concurrent access. 921 */ 922 void 923 xfs_log_sb( 924 struct xfs_trans *tp) 925 { 926 struct xfs_mount *mp = tp->t_mountp; 927 struct xfs_buf *bp = xfs_trans_getsb(tp); 928 929 /* 930 * Lazy sb counters don't update the in-core superblock so do that now. 931 * If this is at unmount, the counters will be exactly correct, but at 932 * any other time they will only be ballpark correct because of 933 * reservations that have been taken out percpu counters. If we have an 934 * unclean shutdown, this will be corrected by log recovery rebuilding 935 * the counters from the AGF block counts. 936 */ 937 if (xfs_sb_version_haslazysbcount(&mp->m_sb)) { 938 mp->m_sb.sb_icount = percpu_counter_sum(&mp->m_icount); 939 mp->m_sb.sb_ifree = percpu_counter_sum(&mp->m_ifree); 940 mp->m_sb.sb_fdblocks = percpu_counter_sum(&mp->m_fdblocks); 941 } 942 943 xfs_sb_to_disk(bp->b_addr, &mp->m_sb); 944 xfs_trans_buf_set_type(tp, bp, XFS_BLFT_SB_BUF); 945 xfs_trans_log_buf(tp, bp, 0, sizeof(struct xfs_dsb) - 1); 946 } 947 948 /* 949 * xfs_sync_sb 950 * 951 * Sync the superblock to disk. 952 * 953 * Note that the caller is responsible for checking the frozen state of the 954 * filesystem. This procedure uses the non-blocking transaction allocator and 955 * thus will allow modifications to a frozen fs. This is required because this 956 * code can be called during the process of freezing where use of the high-level 957 * allocator would deadlock. 958 */ 959 int 960 xfs_sync_sb( 961 struct xfs_mount *mp, 962 bool wait) 963 { 964 struct xfs_trans *tp; 965 int error; 966 967 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_sb, 0, 0, 968 XFS_TRANS_NO_WRITECOUNT, &tp); 969 if (error) 970 return error; 971 972 xfs_log_sb(tp); 973 if (wait) 974 xfs_trans_set_sync(tp); 975 return xfs_trans_commit(tp); 976 } 977 978 /* 979 * Update all the secondary superblocks to match the new state of the primary. 980 * Because we are completely overwriting all the existing fields in the 981 * secondary superblock buffers, there is no need to read them in from disk. 982 * Just get a new buffer, stamp it and write it. 983 * 984 * The sb buffers need to be cached here so that we serialise against other 985 * operations that access the secondary superblocks, but we don't want to keep 986 * them in memory once it is written so we mark it as a one-shot buffer. 987 */ 988 int 989 xfs_update_secondary_sbs( 990 struct xfs_mount *mp) 991 { 992 xfs_agnumber_t agno; 993 int saved_error = 0; 994 int error = 0; 995 LIST_HEAD (buffer_list); 996 997 /* update secondary superblocks. */ 998 for (agno = 1; agno < mp->m_sb.sb_agcount; agno++) { 999 struct xfs_buf *bp; 1000 1001 error = xfs_buf_get(mp->m_ddev_targp, 1002 XFS_AG_DADDR(mp, agno, XFS_SB_DADDR), 1003 XFS_FSS_TO_BB(mp, 1), &bp); 1004 /* 1005 * If we get an error reading or writing alternate superblocks, 1006 * continue. xfs_repair chooses the "best" superblock based 1007 * on most matches; if we break early, we'll leave more 1008 * superblocks un-updated than updated, and xfs_repair may 1009 * pick them over the properly-updated primary. 1010 */ 1011 if (error) { 1012 xfs_warn(mp, 1013 "error allocating secondary superblock for ag %d", 1014 agno); 1015 if (!saved_error) 1016 saved_error = error; 1017 continue; 1018 } 1019 1020 bp->b_ops = &xfs_sb_buf_ops; 1021 xfs_buf_oneshot(bp); 1022 xfs_buf_zero(bp, 0, BBTOB(bp->b_length)); 1023 xfs_sb_to_disk(bp->b_addr, &mp->m_sb); 1024 xfs_buf_delwri_queue(bp, &buffer_list); 1025 xfs_buf_relse(bp); 1026 1027 /* don't hold too many buffers at once */ 1028 if (agno % 16) 1029 continue; 1030 1031 error = xfs_buf_delwri_submit(&buffer_list); 1032 if (error) { 1033 xfs_warn(mp, 1034 "write error %d updating a secondary superblock near ag %d", 1035 error, agno); 1036 if (!saved_error) 1037 saved_error = error; 1038 continue; 1039 } 1040 } 1041 error = xfs_buf_delwri_submit(&buffer_list); 1042 if (error) { 1043 xfs_warn(mp, 1044 "write error %d updating a secondary superblock near ag %d", 1045 error, agno); 1046 } 1047 1048 return saved_error ? saved_error : error; 1049 } 1050 1051 /* 1052 * Same behavior as xfs_sync_sb, except that it is always synchronous and it 1053 * also writes the superblock buffer to disk sector 0 immediately. 1054 */ 1055 int 1056 xfs_sync_sb_buf( 1057 struct xfs_mount *mp) 1058 { 1059 struct xfs_trans *tp; 1060 struct xfs_buf *bp; 1061 int error; 1062 1063 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_sb, 0, 0, 0, &tp); 1064 if (error) 1065 return error; 1066 1067 bp = xfs_trans_getsb(tp); 1068 xfs_log_sb(tp); 1069 xfs_trans_bhold(tp, bp); 1070 xfs_trans_set_sync(tp); 1071 error = xfs_trans_commit(tp); 1072 if (error) 1073 goto out; 1074 /* 1075 * write out the sb buffer to get the changes to disk 1076 */ 1077 error = xfs_bwrite(bp); 1078 out: 1079 xfs_buf_relse(bp); 1080 return error; 1081 } 1082 1083 void 1084 xfs_fs_geometry( 1085 struct xfs_sb *sbp, 1086 struct xfs_fsop_geom *geo, 1087 int struct_version) 1088 { 1089 memset(geo, 0, sizeof(struct xfs_fsop_geom)); 1090 1091 geo->blocksize = sbp->sb_blocksize; 1092 geo->rtextsize = sbp->sb_rextsize; 1093 geo->agblocks = sbp->sb_agblocks; 1094 geo->agcount = sbp->sb_agcount; 1095 geo->logblocks = sbp->sb_logblocks; 1096 geo->sectsize = sbp->sb_sectsize; 1097 geo->inodesize = sbp->sb_inodesize; 1098 geo->imaxpct = sbp->sb_imax_pct; 1099 geo->datablocks = sbp->sb_dblocks; 1100 geo->rtblocks = sbp->sb_rblocks; 1101 geo->rtextents = sbp->sb_rextents; 1102 geo->logstart = sbp->sb_logstart; 1103 BUILD_BUG_ON(sizeof(geo->uuid) != sizeof(sbp->sb_uuid)); 1104 memcpy(geo->uuid, &sbp->sb_uuid, sizeof(sbp->sb_uuid)); 1105 1106 if (struct_version < 2) 1107 return; 1108 1109 geo->sunit = sbp->sb_unit; 1110 geo->swidth = sbp->sb_width; 1111 1112 if (struct_version < 3) 1113 return; 1114 1115 geo->version = XFS_FSOP_GEOM_VERSION; 1116 geo->flags = XFS_FSOP_GEOM_FLAGS_NLINK | 1117 XFS_FSOP_GEOM_FLAGS_DIRV2 | 1118 XFS_FSOP_GEOM_FLAGS_EXTFLG; 1119 if (xfs_sb_version_hasattr(sbp)) 1120 geo->flags |= XFS_FSOP_GEOM_FLAGS_ATTR; 1121 if (xfs_sb_version_hasquota(sbp)) 1122 geo->flags |= XFS_FSOP_GEOM_FLAGS_QUOTA; 1123 if (xfs_sb_version_hasalign(sbp)) 1124 geo->flags |= XFS_FSOP_GEOM_FLAGS_IALIGN; 1125 if (xfs_sb_version_hasdalign(sbp)) 1126 geo->flags |= XFS_FSOP_GEOM_FLAGS_DALIGN; 1127 if (xfs_sb_version_hassector(sbp)) 1128 geo->flags |= XFS_FSOP_GEOM_FLAGS_SECTOR; 1129 if (xfs_sb_version_hasasciici(sbp)) 1130 geo->flags |= XFS_FSOP_GEOM_FLAGS_DIRV2CI; 1131 if (xfs_sb_version_haslazysbcount(sbp)) 1132 geo->flags |= XFS_FSOP_GEOM_FLAGS_LAZYSB; 1133 if (xfs_sb_version_hasattr2(sbp)) 1134 geo->flags |= XFS_FSOP_GEOM_FLAGS_ATTR2; 1135 if (xfs_sb_version_hasprojid32bit(sbp)) 1136 geo->flags |= XFS_FSOP_GEOM_FLAGS_PROJID32; 1137 if (xfs_sb_version_hascrc(sbp)) 1138 geo->flags |= XFS_FSOP_GEOM_FLAGS_V5SB; 1139 if (xfs_sb_version_hasftype(sbp)) 1140 geo->flags |= XFS_FSOP_GEOM_FLAGS_FTYPE; 1141 if (xfs_sb_version_hasfinobt(sbp)) 1142 geo->flags |= XFS_FSOP_GEOM_FLAGS_FINOBT; 1143 if (xfs_sb_version_hassparseinodes(sbp)) 1144 geo->flags |= XFS_FSOP_GEOM_FLAGS_SPINODES; 1145 if (xfs_sb_version_hasrmapbt(sbp)) 1146 geo->flags |= XFS_FSOP_GEOM_FLAGS_RMAPBT; 1147 if (xfs_sb_version_hasreflink(sbp)) 1148 geo->flags |= XFS_FSOP_GEOM_FLAGS_REFLINK; 1149 if (xfs_sb_version_hasbigtime(sbp)) 1150 geo->flags |= XFS_FSOP_GEOM_FLAGS_BIGTIME; 1151 if (xfs_sb_version_hasinobtcounts(sbp)) 1152 geo->flags |= XFS_FSOP_GEOM_FLAGS_INOBTCNT; 1153 if (xfs_sb_version_hassector(sbp)) 1154 geo->logsectsize = sbp->sb_logsectsize; 1155 else 1156 geo->logsectsize = BBSIZE; 1157 geo->rtsectsize = sbp->sb_blocksize; 1158 geo->dirblocksize = xfs_dir2_dirblock_bytes(sbp); 1159 1160 if (struct_version < 4) 1161 return; 1162 1163 if (xfs_sb_version_haslogv2(sbp)) 1164 geo->flags |= XFS_FSOP_GEOM_FLAGS_LOGV2; 1165 1166 geo->logsunit = sbp->sb_logsunit; 1167 1168 if (struct_version < 5) 1169 return; 1170 1171 geo->version = XFS_FSOP_GEOM_VERSION_V5; 1172 } 1173 1174 /* Read a secondary superblock. */ 1175 int 1176 xfs_sb_read_secondary( 1177 struct xfs_mount *mp, 1178 struct xfs_trans *tp, 1179 xfs_agnumber_t agno, 1180 struct xfs_buf **bpp) 1181 { 1182 struct xfs_buf *bp; 1183 int error; 1184 1185 ASSERT(agno != 0 && agno != NULLAGNUMBER); 1186 error = xfs_trans_read_buf(mp, tp, mp->m_ddev_targp, 1187 XFS_AG_DADDR(mp, agno, XFS_SB_BLOCK(mp)), 1188 XFS_FSS_TO_BB(mp, 1), 0, &bp, &xfs_sb_buf_ops); 1189 if (error) 1190 return error; 1191 xfs_buf_set_ref(bp, XFS_SSB_REF); 1192 *bpp = bp; 1193 return 0; 1194 } 1195 1196 /* Get an uninitialised secondary superblock buffer. */ 1197 int 1198 xfs_sb_get_secondary( 1199 struct xfs_mount *mp, 1200 struct xfs_trans *tp, 1201 xfs_agnumber_t agno, 1202 struct xfs_buf **bpp) 1203 { 1204 struct xfs_buf *bp; 1205 int error; 1206 1207 ASSERT(agno != 0 && agno != NULLAGNUMBER); 1208 error = xfs_trans_get_buf(tp, mp->m_ddev_targp, 1209 XFS_AG_DADDR(mp, agno, XFS_SB_BLOCK(mp)), 1210 XFS_FSS_TO_BB(mp, 1), 0, &bp); 1211 if (error) 1212 return error; 1213 bp->b_ops = &xfs_sb_buf_ops; 1214 xfs_buf_oneshot(bp); 1215 *bpp = bp; 1216 return 0; 1217 } 1218 1219 /* 1220 * sunit, swidth, sectorsize(optional with 0) should be all in bytes, 1221 * so users won't be confused by values in error messages. 1222 */ 1223 bool 1224 xfs_validate_stripe_geometry( 1225 struct xfs_mount *mp, 1226 __s64 sunit, 1227 __s64 swidth, 1228 int sectorsize, 1229 bool silent) 1230 { 1231 if (swidth > INT_MAX) { 1232 if (!silent) 1233 xfs_notice(mp, 1234 "stripe width (%lld) is too large", swidth); 1235 return false; 1236 } 1237 1238 if (sunit > swidth) { 1239 if (!silent) 1240 xfs_notice(mp, 1241 "stripe unit (%lld) is larger than the stripe width (%lld)", sunit, swidth); 1242 return false; 1243 } 1244 1245 if (sectorsize && (int)sunit % sectorsize) { 1246 if (!silent) 1247 xfs_notice(mp, 1248 "stripe unit (%lld) must be a multiple of the sector size (%d)", 1249 sunit, sectorsize); 1250 return false; 1251 } 1252 1253 if (sunit && !swidth) { 1254 if (!silent) 1255 xfs_notice(mp, 1256 "invalid stripe unit (%lld) and stripe width of 0", sunit); 1257 return false; 1258 } 1259 1260 if (!sunit && swidth) { 1261 if (!silent) 1262 xfs_notice(mp, 1263 "invalid stripe width (%lld) and stripe unit of 0", swidth); 1264 return false; 1265 } 1266 1267 if (sunit && (int)swidth % (int)sunit) { 1268 if (!silent) 1269 xfs_notice(mp, 1270 "stripe width (%lld) must be a multiple of the stripe unit (%lld)", 1271 swidth, sunit); 1272 return false; 1273 } 1274 return true; 1275 } 1276