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_[PQ]UOTA_{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 if (sbp->sb_unit) { 332 if (!xfs_sb_version_hasdalign(sbp) || 333 sbp->sb_unit > sbp->sb_width || 334 (sbp->sb_width % sbp->sb_unit) != 0) { 335 xfs_notice(mp, "SB stripe unit sanity check failed"); 336 return -EFSCORRUPTED; 337 } 338 } else if (xfs_sb_version_hasdalign(sbp)) { 339 xfs_notice(mp, "SB stripe alignment sanity check failed"); 340 return -EFSCORRUPTED; 341 } else if (sbp->sb_width) { 342 xfs_notice(mp, "SB stripe width sanity check failed"); 343 return -EFSCORRUPTED; 344 } 345 346 347 if (xfs_sb_version_hascrc(&mp->m_sb) && 348 sbp->sb_blocksize < XFS_MIN_CRC_BLOCKSIZE) { 349 xfs_notice(mp, "v5 SB sanity check failed"); 350 return -EFSCORRUPTED; 351 } 352 353 /* 354 * Until this is fixed only page-sized or smaller data blocks work. 355 */ 356 if (unlikely(sbp->sb_blocksize > PAGE_SIZE)) { 357 xfs_warn(mp, 358 "File system with blocksize %d bytes. " 359 "Only pagesize (%ld) or less will currently work.", 360 sbp->sb_blocksize, PAGE_SIZE); 361 return -ENOSYS; 362 } 363 364 /* 365 * Currently only very few inode sizes are supported. 366 */ 367 switch (sbp->sb_inodesize) { 368 case 256: 369 case 512: 370 case 1024: 371 case 2048: 372 break; 373 default: 374 xfs_warn(mp, "inode size of %d bytes not supported", 375 sbp->sb_inodesize); 376 return -ENOSYS; 377 } 378 379 if (xfs_sb_validate_fsb_count(sbp, sbp->sb_dblocks) || 380 xfs_sb_validate_fsb_count(sbp, sbp->sb_rblocks)) { 381 xfs_warn(mp, 382 "file system too large to be mounted on this system."); 383 return -EFBIG; 384 } 385 386 /* 387 * Don't touch the filesystem if a user tool thinks it owns the primary 388 * superblock. mkfs doesn't clear the flag from secondary supers, so 389 * we don't check them at all. 390 */ 391 if (XFS_BUF_ADDR(bp) == XFS_SB_DADDR && sbp->sb_inprogress) { 392 xfs_warn(mp, "Offline file system operation in progress!"); 393 return -EFSCORRUPTED; 394 } 395 return 0; 396 } 397 398 void 399 xfs_sb_quota_from_disk(struct xfs_sb *sbp) 400 { 401 /* 402 * older mkfs doesn't initialize quota inodes to NULLFSINO. This 403 * leads to in-core values having two different values for a quota 404 * inode to be invalid: 0 and NULLFSINO. Change it to a single value 405 * NULLFSINO. 406 * 407 * Note that this change affect only the in-core values. These 408 * values are not written back to disk unless any quota information 409 * is written to the disk. Even in that case, sb_pquotino field is 410 * not written to disk unless the superblock supports pquotino. 411 */ 412 if (sbp->sb_uquotino == 0) 413 sbp->sb_uquotino = NULLFSINO; 414 if (sbp->sb_gquotino == 0) 415 sbp->sb_gquotino = NULLFSINO; 416 if (sbp->sb_pquotino == 0) 417 sbp->sb_pquotino = NULLFSINO; 418 419 /* 420 * We need to do these manipilations only if we are working 421 * with an older version of on-disk superblock. 422 */ 423 if (xfs_sb_version_has_pquotino(sbp)) 424 return; 425 426 if (sbp->sb_qflags & XFS_OQUOTA_ENFD) 427 sbp->sb_qflags |= (sbp->sb_qflags & XFS_PQUOTA_ACCT) ? 428 XFS_PQUOTA_ENFD : XFS_GQUOTA_ENFD; 429 if (sbp->sb_qflags & XFS_OQUOTA_CHKD) 430 sbp->sb_qflags |= (sbp->sb_qflags & XFS_PQUOTA_ACCT) ? 431 XFS_PQUOTA_CHKD : XFS_GQUOTA_CHKD; 432 sbp->sb_qflags &= ~(XFS_OQUOTA_ENFD | XFS_OQUOTA_CHKD); 433 434 if (sbp->sb_qflags & XFS_PQUOTA_ACCT && 435 sbp->sb_gquotino != NULLFSINO) { 436 /* 437 * In older version of superblock, on-disk superblock only 438 * has sb_gquotino, and in-core superblock has both sb_gquotino 439 * and sb_pquotino. But, only one of them is supported at any 440 * point of time. So, if PQUOTA is set in disk superblock, 441 * copy over sb_gquotino to sb_pquotino. The NULLFSINO test 442 * above is to make sure we don't do this twice and wipe them 443 * both out! 444 */ 445 sbp->sb_pquotino = sbp->sb_gquotino; 446 sbp->sb_gquotino = NULLFSINO; 447 } 448 } 449 450 static void 451 __xfs_sb_from_disk( 452 struct xfs_sb *to, 453 xfs_dsb_t *from, 454 bool convert_xquota) 455 { 456 to->sb_magicnum = be32_to_cpu(from->sb_magicnum); 457 to->sb_blocksize = be32_to_cpu(from->sb_blocksize); 458 to->sb_dblocks = be64_to_cpu(from->sb_dblocks); 459 to->sb_rblocks = be64_to_cpu(from->sb_rblocks); 460 to->sb_rextents = be64_to_cpu(from->sb_rextents); 461 memcpy(&to->sb_uuid, &from->sb_uuid, sizeof(to->sb_uuid)); 462 to->sb_logstart = be64_to_cpu(from->sb_logstart); 463 to->sb_rootino = be64_to_cpu(from->sb_rootino); 464 to->sb_rbmino = be64_to_cpu(from->sb_rbmino); 465 to->sb_rsumino = be64_to_cpu(from->sb_rsumino); 466 to->sb_rextsize = be32_to_cpu(from->sb_rextsize); 467 to->sb_agblocks = be32_to_cpu(from->sb_agblocks); 468 to->sb_agcount = be32_to_cpu(from->sb_agcount); 469 to->sb_rbmblocks = be32_to_cpu(from->sb_rbmblocks); 470 to->sb_logblocks = be32_to_cpu(from->sb_logblocks); 471 to->sb_versionnum = be16_to_cpu(from->sb_versionnum); 472 to->sb_sectsize = be16_to_cpu(from->sb_sectsize); 473 to->sb_inodesize = be16_to_cpu(from->sb_inodesize); 474 to->sb_inopblock = be16_to_cpu(from->sb_inopblock); 475 memcpy(&to->sb_fname, &from->sb_fname, sizeof(to->sb_fname)); 476 to->sb_blocklog = from->sb_blocklog; 477 to->sb_sectlog = from->sb_sectlog; 478 to->sb_inodelog = from->sb_inodelog; 479 to->sb_inopblog = from->sb_inopblog; 480 to->sb_agblklog = from->sb_agblklog; 481 to->sb_rextslog = from->sb_rextslog; 482 to->sb_inprogress = from->sb_inprogress; 483 to->sb_imax_pct = from->sb_imax_pct; 484 to->sb_icount = be64_to_cpu(from->sb_icount); 485 to->sb_ifree = be64_to_cpu(from->sb_ifree); 486 to->sb_fdblocks = be64_to_cpu(from->sb_fdblocks); 487 to->sb_frextents = be64_to_cpu(from->sb_frextents); 488 to->sb_uquotino = be64_to_cpu(from->sb_uquotino); 489 to->sb_gquotino = be64_to_cpu(from->sb_gquotino); 490 to->sb_qflags = be16_to_cpu(from->sb_qflags); 491 to->sb_flags = from->sb_flags; 492 to->sb_shared_vn = from->sb_shared_vn; 493 to->sb_inoalignmt = be32_to_cpu(from->sb_inoalignmt); 494 to->sb_unit = be32_to_cpu(from->sb_unit); 495 to->sb_width = be32_to_cpu(from->sb_width); 496 to->sb_dirblklog = from->sb_dirblklog; 497 to->sb_logsectlog = from->sb_logsectlog; 498 to->sb_logsectsize = be16_to_cpu(from->sb_logsectsize); 499 to->sb_logsunit = be32_to_cpu(from->sb_logsunit); 500 to->sb_features2 = be32_to_cpu(from->sb_features2); 501 to->sb_bad_features2 = be32_to_cpu(from->sb_bad_features2); 502 to->sb_features_compat = be32_to_cpu(from->sb_features_compat); 503 to->sb_features_ro_compat = be32_to_cpu(from->sb_features_ro_compat); 504 to->sb_features_incompat = be32_to_cpu(from->sb_features_incompat); 505 to->sb_features_log_incompat = 506 be32_to_cpu(from->sb_features_log_incompat); 507 /* crc is only used on disk, not in memory; just init to 0 here. */ 508 to->sb_crc = 0; 509 to->sb_spino_align = be32_to_cpu(from->sb_spino_align); 510 to->sb_pquotino = be64_to_cpu(from->sb_pquotino); 511 to->sb_lsn = be64_to_cpu(from->sb_lsn); 512 /* 513 * sb_meta_uuid is only on disk if it differs from sb_uuid and the 514 * feature flag is set; if not set we keep it only in memory. 515 */ 516 if (xfs_sb_version_hasmetauuid(to)) 517 uuid_copy(&to->sb_meta_uuid, &from->sb_meta_uuid); 518 else 519 uuid_copy(&to->sb_meta_uuid, &from->sb_uuid); 520 /* Convert on-disk flags to in-memory flags? */ 521 if (convert_xquota) 522 xfs_sb_quota_from_disk(to); 523 } 524 525 void 526 xfs_sb_from_disk( 527 struct xfs_sb *to, 528 xfs_dsb_t *from) 529 { 530 __xfs_sb_from_disk(to, from, true); 531 } 532 533 static void 534 xfs_sb_quota_to_disk( 535 struct xfs_dsb *to, 536 struct xfs_sb *from) 537 { 538 uint16_t qflags = from->sb_qflags; 539 540 to->sb_uquotino = cpu_to_be64(from->sb_uquotino); 541 if (xfs_sb_version_has_pquotino(from)) { 542 to->sb_qflags = cpu_to_be16(from->sb_qflags); 543 to->sb_gquotino = cpu_to_be64(from->sb_gquotino); 544 to->sb_pquotino = cpu_to_be64(from->sb_pquotino); 545 return; 546 } 547 548 /* 549 * The in-core version of sb_qflags do not have XFS_OQUOTA_* 550 * flags, whereas the on-disk version does. So, convert incore 551 * XFS_{PG}QUOTA_* flags to on-disk XFS_OQUOTA_* flags. 552 */ 553 qflags &= ~(XFS_PQUOTA_ENFD | XFS_PQUOTA_CHKD | 554 XFS_GQUOTA_ENFD | XFS_GQUOTA_CHKD); 555 556 if (from->sb_qflags & 557 (XFS_PQUOTA_ENFD | XFS_GQUOTA_ENFD)) 558 qflags |= XFS_OQUOTA_ENFD; 559 if (from->sb_qflags & 560 (XFS_PQUOTA_CHKD | XFS_GQUOTA_CHKD)) 561 qflags |= XFS_OQUOTA_CHKD; 562 to->sb_qflags = cpu_to_be16(qflags); 563 564 /* 565 * GQUOTINO and PQUOTINO cannot be used together in versions 566 * of superblock that do not have pquotino. from->sb_flags 567 * tells us which quota is active and should be copied to 568 * disk. If neither are active, we should NULL the inode. 569 * 570 * In all cases, the separate pquotino must remain 0 because it 571 * it beyond the "end" of the valid non-pquotino superblock. 572 */ 573 if (from->sb_qflags & XFS_GQUOTA_ACCT) 574 to->sb_gquotino = cpu_to_be64(from->sb_gquotino); 575 else if (from->sb_qflags & XFS_PQUOTA_ACCT) 576 to->sb_gquotino = cpu_to_be64(from->sb_pquotino); 577 else { 578 /* 579 * We can't rely on just the fields being logged to tell us 580 * that it is safe to write NULLFSINO - we should only do that 581 * if quotas are not actually enabled. Hence only write 582 * NULLFSINO if both in-core quota inodes are NULL. 583 */ 584 if (from->sb_gquotino == NULLFSINO && 585 from->sb_pquotino == NULLFSINO) 586 to->sb_gquotino = cpu_to_be64(NULLFSINO); 587 } 588 589 to->sb_pquotino = 0; 590 } 591 592 void 593 xfs_sb_to_disk( 594 struct xfs_dsb *to, 595 struct xfs_sb *from) 596 { 597 xfs_sb_quota_to_disk(to, from); 598 599 to->sb_magicnum = cpu_to_be32(from->sb_magicnum); 600 to->sb_blocksize = cpu_to_be32(from->sb_blocksize); 601 to->sb_dblocks = cpu_to_be64(from->sb_dblocks); 602 to->sb_rblocks = cpu_to_be64(from->sb_rblocks); 603 to->sb_rextents = cpu_to_be64(from->sb_rextents); 604 memcpy(&to->sb_uuid, &from->sb_uuid, sizeof(to->sb_uuid)); 605 to->sb_logstart = cpu_to_be64(from->sb_logstart); 606 to->sb_rootino = cpu_to_be64(from->sb_rootino); 607 to->sb_rbmino = cpu_to_be64(from->sb_rbmino); 608 to->sb_rsumino = cpu_to_be64(from->sb_rsumino); 609 to->sb_rextsize = cpu_to_be32(from->sb_rextsize); 610 to->sb_agblocks = cpu_to_be32(from->sb_agblocks); 611 to->sb_agcount = cpu_to_be32(from->sb_agcount); 612 to->sb_rbmblocks = cpu_to_be32(from->sb_rbmblocks); 613 to->sb_logblocks = cpu_to_be32(from->sb_logblocks); 614 to->sb_versionnum = cpu_to_be16(from->sb_versionnum); 615 to->sb_sectsize = cpu_to_be16(from->sb_sectsize); 616 to->sb_inodesize = cpu_to_be16(from->sb_inodesize); 617 to->sb_inopblock = cpu_to_be16(from->sb_inopblock); 618 memcpy(&to->sb_fname, &from->sb_fname, sizeof(to->sb_fname)); 619 to->sb_blocklog = from->sb_blocklog; 620 to->sb_sectlog = from->sb_sectlog; 621 to->sb_inodelog = from->sb_inodelog; 622 to->sb_inopblog = from->sb_inopblog; 623 to->sb_agblklog = from->sb_agblklog; 624 to->sb_rextslog = from->sb_rextslog; 625 to->sb_inprogress = from->sb_inprogress; 626 to->sb_imax_pct = from->sb_imax_pct; 627 to->sb_icount = cpu_to_be64(from->sb_icount); 628 to->sb_ifree = cpu_to_be64(from->sb_ifree); 629 to->sb_fdblocks = cpu_to_be64(from->sb_fdblocks); 630 to->sb_frextents = cpu_to_be64(from->sb_frextents); 631 632 to->sb_flags = from->sb_flags; 633 to->sb_shared_vn = from->sb_shared_vn; 634 to->sb_inoalignmt = cpu_to_be32(from->sb_inoalignmt); 635 to->sb_unit = cpu_to_be32(from->sb_unit); 636 to->sb_width = cpu_to_be32(from->sb_width); 637 to->sb_dirblklog = from->sb_dirblklog; 638 to->sb_logsectlog = from->sb_logsectlog; 639 to->sb_logsectsize = cpu_to_be16(from->sb_logsectsize); 640 to->sb_logsunit = cpu_to_be32(from->sb_logsunit); 641 642 /* 643 * We need to ensure that bad_features2 always matches features2. 644 * Hence we enforce that here rather than having to remember to do it 645 * everywhere else that updates features2. 646 */ 647 from->sb_bad_features2 = from->sb_features2; 648 to->sb_features2 = cpu_to_be32(from->sb_features2); 649 to->sb_bad_features2 = cpu_to_be32(from->sb_bad_features2); 650 651 if (xfs_sb_version_hascrc(from)) { 652 to->sb_features_compat = cpu_to_be32(from->sb_features_compat); 653 to->sb_features_ro_compat = 654 cpu_to_be32(from->sb_features_ro_compat); 655 to->sb_features_incompat = 656 cpu_to_be32(from->sb_features_incompat); 657 to->sb_features_log_incompat = 658 cpu_to_be32(from->sb_features_log_incompat); 659 to->sb_spino_align = cpu_to_be32(from->sb_spino_align); 660 to->sb_lsn = cpu_to_be64(from->sb_lsn); 661 if (xfs_sb_version_hasmetauuid(from)) 662 uuid_copy(&to->sb_meta_uuid, &from->sb_meta_uuid); 663 } 664 } 665 666 /* 667 * If the superblock has the CRC feature bit set or the CRC field is non-null, 668 * check that the CRC is valid. We check the CRC field is non-null because a 669 * single bit error could clear the feature bit and unused parts of the 670 * superblock are supposed to be zero. Hence a non-null crc field indicates that 671 * we've potentially lost a feature bit and we should check it anyway. 672 * 673 * However, past bugs (i.e. in growfs) left non-zeroed regions beyond the 674 * last field in V4 secondary superblocks. So for secondary superblocks, 675 * we are more forgiving, and ignore CRC failures if the primary doesn't 676 * indicate that the fs version is V5. 677 */ 678 static void 679 xfs_sb_read_verify( 680 struct xfs_buf *bp) 681 { 682 struct xfs_sb sb; 683 struct xfs_mount *mp = bp->b_mount; 684 struct xfs_dsb *dsb = bp->b_addr; 685 int error; 686 687 /* 688 * open code the version check to avoid needing to convert the entire 689 * superblock from disk order just to check the version number 690 */ 691 if (dsb->sb_magicnum == cpu_to_be32(XFS_SB_MAGIC) && 692 (((be16_to_cpu(dsb->sb_versionnum) & XFS_SB_VERSION_NUMBITS) == 693 XFS_SB_VERSION_5) || 694 dsb->sb_crc != 0)) { 695 696 if (!xfs_buf_verify_cksum(bp, XFS_SB_CRC_OFF)) { 697 /* Only fail bad secondaries on a known V5 filesystem */ 698 if (bp->b_bn == XFS_SB_DADDR || 699 xfs_sb_version_hascrc(&mp->m_sb)) { 700 error = -EFSBADCRC; 701 goto out_error; 702 } 703 } 704 } 705 706 /* 707 * Check all the superblock fields. Don't byteswap the xquota flags 708 * because _verify_common checks the on-disk values. 709 */ 710 __xfs_sb_from_disk(&sb, dsb, false); 711 error = xfs_validate_sb_common(mp, bp, &sb); 712 if (error) 713 goto out_error; 714 error = xfs_validate_sb_read(mp, &sb); 715 716 out_error: 717 if (error == -EFSCORRUPTED || error == -EFSBADCRC) 718 xfs_verifier_error(bp, error, __this_address); 719 else if (error) 720 xfs_buf_ioerror(bp, error); 721 } 722 723 /* 724 * We may be probed for a filesystem match, so we may not want to emit 725 * messages when the superblock buffer is not actually an XFS superblock. 726 * If we find an XFS superblock, then run a normal, noisy mount because we are 727 * really going to mount it and want to know about errors. 728 */ 729 static void 730 xfs_sb_quiet_read_verify( 731 struct xfs_buf *bp) 732 { 733 struct xfs_dsb *dsb = bp->b_addr; 734 735 if (dsb->sb_magicnum == cpu_to_be32(XFS_SB_MAGIC)) { 736 /* XFS filesystem, verify noisily! */ 737 xfs_sb_read_verify(bp); 738 return; 739 } 740 /* quietly fail */ 741 xfs_buf_ioerror(bp, -EWRONGFS); 742 } 743 744 static void 745 xfs_sb_write_verify( 746 struct xfs_buf *bp) 747 { 748 struct xfs_sb sb; 749 struct xfs_mount *mp = bp->b_mount; 750 struct xfs_buf_log_item *bip = bp->b_log_item; 751 struct xfs_dsb *dsb = bp->b_addr; 752 int error; 753 754 /* 755 * Check all the superblock fields. Don't byteswap the xquota flags 756 * because _verify_common checks the on-disk values. 757 */ 758 __xfs_sb_from_disk(&sb, dsb, false); 759 error = xfs_validate_sb_common(mp, bp, &sb); 760 if (error) 761 goto out_error; 762 error = xfs_validate_sb_write(mp, bp, &sb); 763 if (error) 764 goto out_error; 765 766 if (!xfs_sb_version_hascrc(&mp->m_sb)) 767 return; 768 769 if (bip) 770 dsb->sb_lsn = cpu_to_be64(bip->bli_item.li_lsn); 771 772 xfs_buf_update_cksum(bp, XFS_SB_CRC_OFF); 773 return; 774 775 out_error: 776 xfs_verifier_error(bp, error, __this_address); 777 } 778 779 const struct xfs_buf_ops xfs_sb_buf_ops = { 780 .name = "xfs_sb", 781 .magic = { cpu_to_be32(XFS_SB_MAGIC), cpu_to_be32(XFS_SB_MAGIC) }, 782 .verify_read = xfs_sb_read_verify, 783 .verify_write = xfs_sb_write_verify, 784 }; 785 786 const struct xfs_buf_ops xfs_sb_quiet_buf_ops = { 787 .name = "xfs_sb_quiet", 788 .magic = { cpu_to_be32(XFS_SB_MAGIC), cpu_to_be32(XFS_SB_MAGIC) }, 789 .verify_read = xfs_sb_quiet_read_verify, 790 .verify_write = xfs_sb_write_verify, 791 }; 792 793 /* 794 * xfs_mount_common 795 * 796 * Mount initialization code establishing various mount 797 * fields from the superblock associated with the given 798 * mount structure. 799 * 800 * Inode geometry are calculated in xfs_ialloc_setup_geometry. 801 */ 802 void 803 xfs_sb_mount_common( 804 struct xfs_mount *mp, 805 struct xfs_sb *sbp) 806 { 807 mp->m_agfrotor = mp->m_agirotor = 0; 808 mp->m_maxagi = mp->m_sb.sb_agcount; 809 mp->m_blkbit_log = sbp->sb_blocklog + XFS_NBBYLOG; 810 mp->m_blkbb_log = sbp->sb_blocklog - BBSHIFT; 811 mp->m_sectbb_log = sbp->sb_sectlog - BBSHIFT; 812 mp->m_agno_log = xfs_highbit32(sbp->sb_agcount - 1) + 1; 813 mp->m_blockmask = sbp->sb_blocksize - 1; 814 mp->m_blockwsize = sbp->sb_blocksize >> XFS_WORDLOG; 815 mp->m_blockwmask = mp->m_blockwsize - 1; 816 817 mp->m_alloc_mxr[0] = xfs_allocbt_maxrecs(mp, sbp->sb_blocksize, 1); 818 mp->m_alloc_mxr[1] = xfs_allocbt_maxrecs(mp, sbp->sb_blocksize, 0); 819 mp->m_alloc_mnr[0] = mp->m_alloc_mxr[0] / 2; 820 mp->m_alloc_mnr[1] = mp->m_alloc_mxr[1] / 2; 821 822 mp->m_bmap_dmxr[0] = xfs_bmbt_maxrecs(mp, sbp->sb_blocksize, 1); 823 mp->m_bmap_dmxr[1] = xfs_bmbt_maxrecs(mp, sbp->sb_blocksize, 0); 824 mp->m_bmap_dmnr[0] = mp->m_bmap_dmxr[0] / 2; 825 mp->m_bmap_dmnr[1] = mp->m_bmap_dmxr[1] / 2; 826 827 mp->m_rmap_mxr[0] = xfs_rmapbt_maxrecs(sbp->sb_blocksize, 1); 828 mp->m_rmap_mxr[1] = xfs_rmapbt_maxrecs(sbp->sb_blocksize, 0); 829 mp->m_rmap_mnr[0] = mp->m_rmap_mxr[0] / 2; 830 mp->m_rmap_mnr[1] = mp->m_rmap_mxr[1] / 2; 831 832 mp->m_refc_mxr[0] = xfs_refcountbt_maxrecs(sbp->sb_blocksize, true); 833 mp->m_refc_mxr[1] = xfs_refcountbt_maxrecs(sbp->sb_blocksize, false); 834 mp->m_refc_mnr[0] = mp->m_refc_mxr[0] / 2; 835 mp->m_refc_mnr[1] = mp->m_refc_mxr[1] / 2; 836 837 mp->m_bsize = XFS_FSB_TO_BB(mp, 1); 838 mp->m_alloc_set_aside = xfs_alloc_set_aside(mp); 839 mp->m_ag_max_usable = xfs_alloc_ag_max_usable(mp); 840 } 841 842 /* 843 * xfs_initialize_perag_data 844 * 845 * Read in each per-ag structure so we can count up the number of 846 * allocated inodes, free inodes and used filesystem blocks as this 847 * information is no longer persistent in the superblock. Once we have 848 * this information, write it into the in-core superblock structure. 849 */ 850 int 851 xfs_initialize_perag_data( 852 struct xfs_mount *mp, 853 xfs_agnumber_t agcount) 854 { 855 xfs_agnumber_t index; 856 xfs_perag_t *pag; 857 xfs_sb_t *sbp = &mp->m_sb; 858 uint64_t ifree = 0; 859 uint64_t ialloc = 0; 860 uint64_t bfree = 0; 861 uint64_t bfreelst = 0; 862 uint64_t btree = 0; 863 uint64_t fdblocks; 864 int error = 0; 865 866 for (index = 0; index < agcount; index++) { 867 /* 868 * read the agf, then the agi. This gets us 869 * all the information we need and populates the 870 * per-ag structures for us. 871 */ 872 error = xfs_alloc_pagf_init(mp, NULL, index, 0); 873 if (error) 874 return error; 875 876 error = xfs_ialloc_pagi_init(mp, NULL, index); 877 if (error) 878 return error; 879 pag = xfs_perag_get(mp, index); 880 ifree += pag->pagi_freecount; 881 ialloc += pag->pagi_count; 882 bfree += pag->pagf_freeblks; 883 bfreelst += pag->pagf_flcount; 884 btree += pag->pagf_btreeblks; 885 xfs_perag_put(pag); 886 } 887 fdblocks = bfree + bfreelst + btree; 888 889 /* 890 * If the new summary counts are obviously incorrect, fail the 891 * mount operation because that implies the AGFs are also corrupt. 892 * Clear FS_COUNTERS so that we don't unmount with a dirty log, which 893 * will prevent xfs_repair from fixing anything. 894 */ 895 if (fdblocks > sbp->sb_dblocks || ifree > ialloc) { 896 xfs_alert(mp, "AGF corruption. Please run xfs_repair."); 897 error = -EFSCORRUPTED; 898 goto out; 899 } 900 901 /* Overwrite incore superblock counters with just-read data */ 902 spin_lock(&mp->m_sb_lock); 903 sbp->sb_ifree = ifree; 904 sbp->sb_icount = ialloc; 905 sbp->sb_fdblocks = fdblocks; 906 spin_unlock(&mp->m_sb_lock); 907 908 xfs_reinit_percpu_counters(mp); 909 out: 910 xfs_fs_mark_healthy(mp, XFS_SICK_FS_COUNTERS); 911 return error; 912 } 913 914 /* 915 * xfs_log_sb() can be used to copy arbitrary changes to the in-core superblock 916 * into the superblock buffer to be logged. It does not provide the higher 917 * level of locking that is needed to protect the in-core superblock from 918 * concurrent access. 919 */ 920 void 921 xfs_log_sb( 922 struct xfs_trans *tp) 923 { 924 struct xfs_mount *mp = tp->t_mountp; 925 struct xfs_buf *bp = xfs_trans_getsb(tp, mp); 926 927 mp->m_sb.sb_icount = percpu_counter_sum(&mp->m_icount); 928 mp->m_sb.sb_ifree = percpu_counter_sum(&mp->m_ifree); 929 mp->m_sb.sb_fdblocks = percpu_counter_sum(&mp->m_fdblocks); 930 931 xfs_sb_to_disk(bp->b_addr, &mp->m_sb); 932 xfs_trans_buf_set_type(tp, bp, XFS_BLFT_SB_BUF); 933 xfs_trans_log_buf(tp, bp, 0, sizeof(struct xfs_dsb) - 1); 934 } 935 936 /* 937 * xfs_sync_sb 938 * 939 * Sync the superblock to disk. 940 * 941 * Note that the caller is responsible for checking the frozen state of the 942 * filesystem. This procedure uses the non-blocking transaction allocator and 943 * thus will allow modifications to a frozen fs. This is required because this 944 * code can be called during the process of freezing where use of the high-level 945 * allocator would deadlock. 946 */ 947 int 948 xfs_sync_sb( 949 struct xfs_mount *mp, 950 bool wait) 951 { 952 struct xfs_trans *tp; 953 int error; 954 955 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_sb, 0, 0, 956 XFS_TRANS_NO_WRITECOUNT, &tp); 957 if (error) 958 return error; 959 960 xfs_log_sb(tp); 961 if (wait) 962 xfs_trans_set_sync(tp); 963 return xfs_trans_commit(tp); 964 } 965 966 /* 967 * Update all the secondary superblocks to match the new state of the primary. 968 * Because we are completely overwriting all the existing fields in the 969 * secondary superblock buffers, there is no need to read them in from disk. 970 * Just get a new buffer, stamp it and write it. 971 * 972 * The sb buffers need to be cached here so that we serialise against other 973 * operations that access the secondary superblocks, but we don't want to keep 974 * them in memory once it is written so we mark it as a one-shot buffer. 975 */ 976 int 977 xfs_update_secondary_sbs( 978 struct xfs_mount *mp) 979 { 980 xfs_agnumber_t agno; 981 int saved_error = 0; 982 int error = 0; 983 LIST_HEAD (buffer_list); 984 985 /* update secondary superblocks. */ 986 for (agno = 1; agno < mp->m_sb.sb_agcount; agno++) { 987 struct xfs_buf *bp; 988 989 error = xfs_buf_get(mp->m_ddev_targp, 990 XFS_AG_DADDR(mp, agno, XFS_SB_DADDR), 991 XFS_FSS_TO_BB(mp, 1), &bp); 992 /* 993 * If we get an error reading or writing alternate superblocks, 994 * continue. xfs_repair chooses the "best" superblock based 995 * on most matches; if we break early, we'll leave more 996 * superblocks un-updated than updated, and xfs_repair may 997 * pick them over the properly-updated primary. 998 */ 999 if (error) { 1000 xfs_warn(mp, 1001 "error allocating secondary superblock for ag %d", 1002 agno); 1003 if (!saved_error) 1004 saved_error = error; 1005 continue; 1006 } 1007 1008 bp->b_ops = &xfs_sb_buf_ops; 1009 xfs_buf_oneshot(bp); 1010 xfs_buf_zero(bp, 0, BBTOB(bp->b_length)); 1011 xfs_sb_to_disk(bp->b_addr, &mp->m_sb); 1012 xfs_buf_delwri_queue(bp, &buffer_list); 1013 xfs_buf_relse(bp); 1014 1015 /* don't hold too many buffers at once */ 1016 if (agno % 16) 1017 continue; 1018 1019 error = xfs_buf_delwri_submit(&buffer_list); 1020 if (error) { 1021 xfs_warn(mp, 1022 "write error %d updating a secondary superblock near ag %d", 1023 error, agno); 1024 if (!saved_error) 1025 saved_error = error; 1026 continue; 1027 } 1028 } 1029 error = xfs_buf_delwri_submit(&buffer_list); 1030 if (error) { 1031 xfs_warn(mp, 1032 "write error %d updating a secondary superblock near ag %d", 1033 error, agno); 1034 } 1035 1036 return saved_error ? saved_error : error; 1037 } 1038 1039 /* 1040 * Same behavior as xfs_sync_sb, except that it is always synchronous and it 1041 * also writes the superblock buffer to disk sector 0 immediately. 1042 */ 1043 int 1044 xfs_sync_sb_buf( 1045 struct xfs_mount *mp) 1046 { 1047 struct xfs_trans *tp; 1048 struct xfs_buf *bp; 1049 int error; 1050 1051 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_sb, 0, 0, 0, &tp); 1052 if (error) 1053 return error; 1054 1055 bp = xfs_trans_getsb(tp, mp); 1056 xfs_log_sb(tp); 1057 xfs_trans_bhold(tp, bp); 1058 xfs_trans_set_sync(tp); 1059 error = xfs_trans_commit(tp); 1060 if (error) 1061 goto out; 1062 /* 1063 * write out the sb buffer to get the changes to disk 1064 */ 1065 error = xfs_bwrite(bp); 1066 out: 1067 xfs_buf_relse(bp); 1068 return error; 1069 } 1070 1071 void 1072 xfs_fs_geometry( 1073 struct xfs_sb *sbp, 1074 struct xfs_fsop_geom *geo, 1075 int struct_version) 1076 { 1077 memset(geo, 0, sizeof(struct xfs_fsop_geom)); 1078 1079 geo->blocksize = sbp->sb_blocksize; 1080 geo->rtextsize = sbp->sb_rextsize; 1081 geo->agblocks = sbp->sb_agblocks; 1082 geo->agcount = sbp->sb_agcount; 1083 geo->logblocks = sbp->sb_logblocks; 1084 geo->sectsize = sbp->sb_sectsize; 1085 geo->inodesize = sbp->sb_inodesize; 1086 geo->imaxpct = sbp->sb_imax_pct; 1087 geo->datablocks = sbp->sb_dblocks; 1088 geo->rtblocks = sbp->sb_rblocks; 1089 geo->rtextents = sbp->sb_rextents; 1090 geo->logstart = sbp->sb_logstart; 1091 BUILD_BUG_ON(sizeof(geo->uuid) != sizeof(sbp->sb_uuid)); 1092 memcpy(geo->uuid, &sbp->sb_uuid, sizeof(sbp->sb_uuid)); 1093 1094 if (struct_version < 2) 1095 return; 1096 1097 geo->sunit = sbp->sb_unit; 1098 geo->swidth = sbp->sb_width; 1099 1100 if (struct_version < 3) 1101 return; 1102 1103 geo->version = XFS_FSOP_GEOM_VERSION; 1104 geo->flags = XFS_FSOP_GEOM_FLAGS_NLINK | 1105 XFS_FSOP_GEOM_FLAGS_DIRV2 | 1106 XFS_FSOP_GEOM_FLAGS_EXTFLG; 1107 if (xfs_sb_version_hasattr(sbp)) 1108 geo->flags |= XFS_FSOP_GEOM_FLAGS_ATTR; 1109 if (xfs_sb_version_hasquota(sbp)) 1110 geo->flags |= XFS_FSOP_GEOM_FLAGS_QUOTA; 1111 if (xfs_sb_version_hasalign(sbp)) 1112 geo->flags |= XFS_FSOP_GEOM_FLAGS_IALIGN; 1113 if (xfs_sb_version_hasdalign(sbp)) 1114 geo->flags |= XFS_FSOP_GEOM_FLAGS_DALIGN; 1115 if (xfs_sb_version_hassector(sbp)) 1116 geo->flags |= XFS_FSOP_GEOM_FLAGS_SECTOR; 1117 if (xfs_sb_version_hasasciici(sbp)) 1118 geo->flags |= XFS_FSOP_GEOM_FLAGS_DIRV2CI; 1119 if (xfs_sb_version_haslazysbcount(sbp)) 1120 geo->flags |= XFS_FSOP_GEOM_FLAGS_LAZYSB; 1121 if (xfs_sb_version_hasattr2(sbp)) 1122 geo->flags |= XFS_FSOP_GEOM_FLAGS_ATTR2; 1123 if (xfs_sb_version_hasprojid32bit(sbp)) 1124 geo->flags |= XFS_FSOP_GEOM_FLAGS_PROJID32; 1125 if (xfs_sb_version_hascrc(sbp)) 1126 geo->flags |= XFS_FSOP_GEOM_FLAGS_V5SB; 1127 if (xfs_sb_version_hasftype(sbp)) 1128 geo->flags |= XFS_FSOP_GEOM_FLAGS_FTYPE; 1129 if (xfs_sb_version_hasfinobt(sbp)) 1130 geo->flags |= XFS_FSOP_GEOM_FLAGS_FINOBT; 1131 if (xfs_sb_version_hassparseinodes(sbp)) 1132 geo->flags |= XFS_FSOP_GEOM_FLAGS_SPINODES; 1133 if (xfs_sb_version_hasrmapbt(sbp)) 1134 geo->flags |= XFS_FSOP_GEOM_FLAGS_RMAPBT; 1135 if (xfs_sb_version_hasreflink(sbp)) 1136 geo->flags |= XFS_FSOP_GEOM_FLAGS_REFLINK; 1137 if (xfs_sb_version_hassector(sbp)) 1138 geo->logsectsize = sbp->sb_logsectsize; 1139 else 1140 geo->logsectsize = BBSIZE; 1141 geo->rtsectsize = sbp->sb_blocksize; 1142 geo->dirblocksize = xfs_dir2_dirblock_bytes(sbp); 1143 1144 if (struct_version < 4) 1145 return; 1146 1147 if (xfs_sb_version_haslogv2(sbp)) 1148 geo->flags |= XFS_FSOP_GEOM_FLAGS_LOGV2; 1149 1150 geo->logsunit = sbp->sb_logsunit; 1151 1152 if (struct_version < 5) 1153 return; 1154 1155 geo->version = XFS_FSOP_GEOM_VERSION_V5; 1156 } 1157 1158 /* Read a secondary superblock. */ 1159 int 1160 xfs_sb_read_secondary( 1161 struct xfs_mount *mp, 1162 struct xfs_trans *tp, 1163 xfs_agnumber_t agno, 1164 struct xfs_buf **bpp) 1165 { 1166 struct xfs_buf *bp; 1167 int error; 1168 1169 ASSERT(agno != 0 && agno != NULLAGNUMBER); 1170 error = xfs_trans_read_buf(mp, tp, mp->m_ddev_targp, 1171 XFS_AG_DADDR(mp, agno, XFS_SB_BLOCK(mp)), 1172 XFS_FSS_TO_BB(mp, 1), 0, &bp, &xfs_sb_buf_ops); 1173 if (error) 1174 return error; 1175 xfs_buf_set_ref(bp, XFS_SSB_REF); 1176 *bpp = bp; 1177 return 0; 1178 } 1179 1180 /* Get an uninitialised secondary superblock buffer. */ 1181 int 1182 xfs_sb_get_secondary( 1183 struct xfs_mount *mp, 1184 struct xfs_trans *tp, 1185 xfs_agnumber_t agno, 1186 struct xfs_buf **bpp) 1187 { 1188 struct xfs_buf *bp; 1189 int error; 1190 1191 ASSERT(agno != 0 && agno != NULLAGNUMBER); 1192 error = xfs_trans_get_buf(tp, mp->m_ddev_targp, 1193 XFS_AG_DADDR(mp, agno, XFS_SB_BLOCK(mp)), 1194 XFS_FSS_TO_BB(mp, 1), 0, &bp); 1195 if (error) 1196 return error; 1197 bp->b_ops = &xfs_sb_buf_ops; 1198 xfs_buf_oneshot(bp); 1199 *bpp = bp; 1200 return 0; 1201 } 1202