| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| David Chinner | 3729 | 50.70% | 58 | 30.69% |
| Darrick J. Wong | 1938 | 26.35% | 48 | 25.40% |
| Christoph Hellwig | 642 | 8.73% | 20 | 10.58% |
| Eric Sandeen | 241 | 3.28% | 21 | 11.11% |
| Hsiang Kao | 206 | 2.80% | 1 | 0.53% |
| Nathan Scott | 131 | 1.78% | 7 | 3.70% |
| Brian Foster | 123 | 1.67% | 5 | 2.65% |
| Chandra Seetharaman | 120 | 1.63% | 4 | 2.12% |
| Olaf Weber | 36 | 0.49% | 1 | 0.53% |
| Namjae Jeon | 24 | 0.33% | 1 | 0.53% |
| Joe Perches | 24 | 0.33% | 1 | 0.53% |
| Allison Henderson | 24 | 0.33% | 2 | 1.06% |
| Russell Cattelan | 20 | 0.27% | 1 | 0.53% |
| Bill O'Donnell | 18 | 0.24% | 1 | 0.53% |
| Carlos Maiolino | 14 | 0.19% | 2 | 1.06% |
| Chandan Babu R | 11 | 0.15% | 2 | 1.06% |
| Dan Rosenberg | 11 | 0.15% | 1 | 0.53% |
| Long Li | 11 | 0.15% | 1 | 0.53% |
| Jie Liu | 6 | 0.08% | 2 | 1.06% |
| Mark Tinguely | 5 | 0.07% | 1 | 0.53% |
| Barry Naujok | 5 | 0.07% | 1 | 0.53% |
| Zorro Lang | 5 | 0.07% | 1 | 0.53% |
| Lachlan McIlroy | 3 | 0.04% | 2 | 1.06% |
| Wengang Wang | 3 | 0.04% | 1 | 0.53% |
| Glen Overby | 2 | 0.03% | 1 | 0.53% |
| Colin Ian King | 1 | 0.01% | 1 | 0.53% |
| Randy Dunlap | 1 | 0.01% | 1 | 0.53% |
| Zhi Yong Wu | 1 | 0.01% | 1 | 0.53% |
| Total | 7355 | 189 |
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// SPDX-License-Identifier: GPL-2.0 /* * Copyright (c) 2000-2005 Silicon Graphics, Inc. * All Rights Reserved. */ #include "xfs.h" #include "xfs_fs.h" #include "xfs_shared.h" #include "xfs_format.h" #include "xfs_log_format.h" #include "xfs_trans_resv.h" #include "xfs_bit.h" #include "xfs_sb.h" #include "xfs_mount.h" #include "xfs_ialloc.h" #include "xfs_alloc.h" #include "xfs_error.h" #include "xfs_trans.h" #include "xfs_buf_item.h" #include "xfs_bmap_btree.h" #include "xfs_alloc_btree.h" #include "xfs_log.h" #include "xfs_rmap_btree.h" #include "xfs_refcount_btree.h" #include "xfs_da_format.h" #include "xfs_health.h" #include "xfs_ag.h" #include "xfs_rtbitmap.h" #include "xfs_exchrange.h" #include "xfs_rtgroup.h" /* * Physical superblock buffer manipulations. Shared with libxfs in userspace. */ /* * Check that all the V4 feature bits that the V5 filesystem format requires are * correctly set. */ static bool xfs_sb_validate_v5_features( struct xfs_sb *sbp) { /* We must not have any unknown V4 feature bits set */ if (sbp->sb_versionnum & ~XFS_SB_VERSION_OKBITS) return false; /* * The CRC bit is considered an invalid V4 flag, so we have to add it * manually to the OKBITS mask. */ if (sbp->sb_features2 & ~(XFS_SB_VERSION2_OKBITS | XFS_SB_VERSION2_CRCBIT)) return false; /* Now check all the required V4 feature flags are set. */ #define V5_VERS_FLAGS (XFS_SB_VERSION_NLINKBIT | \ XFS_SB_VERSION_ALIGNBIT | \ XFS_SB_VERSION_LOGV2BIT | \ XFS_SB_VERSION_EXTFLGBIT | \ XFS_SB_VERSION_DIRV2BIT | \ XFS_SB_VERSION_MOREBITSBIT) #define V5_FEAT_FLAGS (XFS_SB_VERSION2_LAZYSBCOUNTBIT | \ XFS_SB_VERSION2_ATTR2BIT | \ XFS_SB_VERSION2_PROJID32BIT | \ XFS_SB_VERSION2_CRCBIT) if ((sbp->sb_versionnum & V5_VERS_FLAGS) != V5_VERS_FLAGS) return false; if ((sbp->sb_features2 & V5_FEAT_FLAGS) != V5_FEAT_FLAGS) return false; return true; } /* * We current support XFS v5 formats with known features and v4 superblocks with * at least V2 directories. */ bool xfs_sb_good_version( struct xfs_sb *sbp) { /* * All v5 filesystems are supported, but we must check that all the * required v4 feature flags are enabled correctly as the code checks * those flags and not for v5 support. */ if (xfs_sb_is_v5(sbp)) return xfs_sb_validate_v5_features(sbp); /* versions prior to v4 are not supported */ if (XFS_SB_VERSION_NUM(sbp) != XFS_SB_VERSION_4) return false; /* We must not have any unknown v4 feature bits set */ if ((sbp->sb_versionnum & ~XFS_SB_VERSION_OKBITS) || ((sbp->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT) && (sbp->sb_features2 & ~XFS_SB_VERSION2_OKBITS))) return false; /* V4 filesystems need v2 directories and unwritten extents */ if (!(sbp->sb_versionnum & XFS_SB_VERSION_DIRV2BIT)) return false; if (!(sbp->sb_versionnum & XFS_SB_VERSION_EXTFLGBIT)) return false; /* It's a supported v4 filesystem */ return true; } uint64_t xfs_sb_version_to_features( struct xfs_sb *sbp) { uint64_t features = 0; /* optional V4 features */ if (sbp->sb_rblocks > 0) features |= XFS_FEAT_REALTIME; if (sbp->sb_versionnum & XFS_SB_VERSION_NLINKBIT) features |= XFS_FEAT_NLINK; if (sbp->sb_versionnum & XFS_SB_VERSION_ATTRBIT) features |= XFS_FEAT_ATTR; if (sbp->sb_versionnum & XFS_SB_VERSION_QUOTABIT) features |= XFS_FEAT_QUOTA; if (sbp->sb_versionnum & XFS_SB_VERSION_ALIGNBIT) features |= XFS_FEAT_ALIGN; if (sbp->sb_versionnum & XFS_SB_VERSION_LOGV2BIT) features |= XFS_FEAT_LOGV2; if (sbp->sb_versionnum & XFS_SB_VERSION_DALIGNBIT) features |= XFS_FEAT_DALIGN; if (sbp->sb_versionnum & XFS_SB_VERSION_EXTFLGBIT) features |= XFS_FEAT_EXTFLG; if (sbp->sb_versionnum & XFS_SB_VERSION_SECTORBIT) features |= XFS_FEAT_SECTOR; if (sbp->sb_versionnum & XFS_SB_VERSION_BORGBIT) features |= XFS_FEAT_ASCIICI; if (sbp->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT) { if (sbp->sb_features2 & XFS_SB_VERSION2_LAZYSBCOUNTBIT) features |= XFS_FEAT_LAZYSBCOUNT; if (sbp->sb_features2 & XFS_SB_VERSION2_ATTR2BIT) features |= XFS_FEAT_ATTR2; if (sbp->sb_features2 & XFS_SB_VERSION2_PROJID32BIT) features |= XFS_FEAT_PROJID32; if (sbp->sb_features2 & XFS_SB_VERSION2_FTYPE) features |= XFS_FEAT_FTYPE; } if (!xfs_sb_is_v5(sbp)) return features; /* Always on V5 features */ features |= XFS_FEAT_ALIGN | XFS_FEAT_LOGV2 | XFS_FEAT_EXTFLG | XFS_FEAT_LAZYSBCOUNT | XFS_FEAT_ATTR2 | XFS_FEAT_PROJID32 | XFS_FEAT_V3INODES | XFS_FEAT_CRC | XFS_FEAT_PQUOTINO; /* Optional V5 features */ if (sbp->sb_features_ro_compat & XFS_SB_FEAT_RO_COMPAT_FINOBT) features |= XFS_FEAT_FINOBT; if (sbp->sb_features_ro_compat & XFS_SB_FEAT_RO_COMPAT_RMAPBT) features |= XFS_FEAT_RMAPBT; if (sbp->sb_features_ro_compat & XFS_SB_FEAT_RO_COMPAT_REFLINK) features |= XFS_FEAT_REFLINK; if (sbp->sb_features_ro_compat & XFS_SB_FEAT_RO_COMPAT_INOBTCNT) features |= XFS_FEAT_INOBTCNT; if (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_FTYPE) features |= XFS_FEAT_FTYPE; if (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_SPINODES) features |= XFS_FEAT_SPINODES; if (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_META_UUID) features |= XFS_FEAT_META_UUID; if (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_BIGTIME) features |= XFS_FEAT_BIGTIME; if (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_NEEDSREPAIR) features |= XFS_FEAT_NEEDSREPAIR; if (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_NREXT64) features |= XFS_FEAT_NREXT64; if (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_EXCHRANGE) features |= XFS_FEAT_EXCHANGE_RANGE; if (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_PARENT) features |= XFS_FEAT_PARENT; if (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_METADIR) features |= XFS_FEAT_METADIR; return features; } /* Check all the superblock fields we care about when reading one in. */ STATIC int xfs_validate_sb_read( struct xfs_mount *mp, struct xfs_sb *sbp) { if (!xfs_sb_is_v5(sbp)) return 0; /* * Version 5 superblock feature mask validation. Reject combinations * the kernel cannot support up front before checking anything else. */ if (xfs_sb_has_compat_feature(sbp, XFS_SB_FEAT_COMPAT_UNKNOWN)) { xfs_warn(mp, "Superblock has unknown compatible features (0x%x) enabled.", (sbp->sb_features_compat & XFS_SB_FEAT_COMPAT_UNKNOWN)); xfs_warn(mp, "Using a more recent kernel is recommended."); } if (xfs_sb_has_ro_compat_feature(sbp, XFS_SB_FEAT_RO_COMPAT_UNKNOWN)) { xfs_alert(mp, "Superblock has unknown read-only compatible features (0x%x) enabled.", (sbp->sb_features_ro_compat & XFS_SB_FEAT_RO_COMPAT_UNKNOWN)); if (!xfs_is_readonly(mp)) { xfs_warn(mp, "Attempted to mount read-only compatible filesystem read-write."); xfs_warn(mp, "Filesystem can only be safely mounted read only."); return -EINVAL; } } if (xfs_sb_has_incompat_feature(sbp, XFS_SB_FEAT_INCOMPAT_UNKNOWN)) { xfs_warn(mp, "Superblock has unknown incompatible features (0x%x) enabled.", (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_UNKNOWN)); xfs_warn(mp, "Filesystem cannot be safely mounted by this kernel."); return -EINVAL; } return 0; } /* Return the number of extents covered by a single rt bitmap file */ static xfs_rtbxlen_t xfs_extents_per_rbm( struct xfs_sb *sbp) { if (xfs_sb_is_v5(sbp) && (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_METADIR)) return sbp->sb_rgextents; return sbp->sb_rextents; } /* * Return the payload size of a single rt bitmap block (without the metadata * header if any). */ static inline unsigned int xfs_rtbmblock_size( struct xfs_sb *sbp) { if (xfs_sb_is_v5(sbp) && (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_METADIR)) return sbp->sb_blocksize - sizeof(struct xfs_rtbuf_blkinfo); return sbp->sb_blocksize; } static uint64_t xfs_expected_rbmblocks( struct xfs_sb *sbp) { return howmany_64(xfs_extents_per_rbm(sbp), NBBY * xfs_rtbmblock_size(sbp)); } /* Validate the realtime geometry */ bool xfs_validate_rt_geometry( struct xfs_sb *sbp) { if (sbp->sb_rextsize * sbp->sb_blocksize > XFS_MAX_RTEXTSIZE || sbp->sb_rextsize * sbp->sb_blocksize < XFS_MIN_RTEXTSIZE) return false; if (sbp->sb_rblocks == 0) { if (sbp->sb_rextents != 0 || sbp->sb_rbmblocks != 0 || sbp->sb_rextslog != 0 || sbp->sb_frextents != 0) return false; return true; } if (sbp->sb_rextents == 0 || sbp->sb_rextents != div_u64(sbp->sb_rblocks, sbp->sb_rextsize) || sbp->sb_rextslog != xfs_compute_rextslog(sbp->sb_rextents) || sbp->sb_rbmblocks != xfs_expected_rbmblocks(sbp)) return false; return true; } /* Check all the superblock fields we care about when writing one out. */ STATIC int xfs_validate_sb_write( struct xfs_mount *mp, struct xfs_buf *bp, struct xfs_sb *sbp) { /* * Carry out additional sb summary counter sanity checks when we write * the superblock. We skip this in the read validator because there * could be newer superblocks in the log and if the values are garbage * even after replay we'll recalculate them at the end of log mount. * * mkfs has traditionally written zeroed counters to inprogress and * secondary superblocks, so allow this usage to continue because * we never read counters from such superblocks. */ if (xfs_buf_daddr(bp) == XFS_SB_DADDR && !sbp->sb_inprogress && (sbp->sb_fdblocks > sbp->sb_dblocks || !xfs_verify_icount(mp, sbp->sb_icount) || sbp->sb_ifree > sbp->sb_icount)) { xfs_warn(mp, "SB summary counter sanity check failed"); return -EFSCORRUPTED; } if (!xfs_sb_is_v5(sbp)) return 0; /* * Version 5 superblock feature mask validation. Reject combinations * the kernel cannot support since we checked for unsupported bits in * the read verifier, which means that memory is corrupt. */ if (!xfs_is_readonly(mp) && xfs_sb_has_ro_compat_feature(sbp, XFS_SB_FEAT_RO_COMPAT_UNKNOWN)) { xfs_alert(mp, "Corruption detected in superblock read-only compatible features (0x%x)!", (sbp->sb_features_ro_compat & XFS_SB_FEAT_RO_COMPAT_UNKNOWN)); return -EFSCORRUPTED; } if (xfs_sb_has_incompat_feature(sbp, XFS_SB_FEAT_INCOMPAT_UNKNOWN)) { xfs_warn(mp, "Corruption detected in superblock incompatible features (0x%x)!", (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_UNKNOWN)); return -EFSCORRUPTED; } if (xfs_sb_has_incompat_log_feature(sbp, XFS_SB_FEAT_INCOMPAT_LOG_UNKNOWN)) { xfs_warn(mp, "Corruption detected in superblock incompatible log features (0x%x)!", (sbp->sb_features_log_incompat & XFS_SB_FEAT_INCOMPAT_LOG_UNKNOWN)); return -EFSCORRUPTED; } /* * We can't read verify the sb LSN because the read verifier is called * before the log is allocated and processed. We know the log is set up * before write verifier calls, so check it here. */ if (!xfs_log_check_lsn(mp, sbp->sb_lsn)) return -EFSCORRUPTED; return 0; } int xfs_compute_rgblklog( xfs_rtxlen_t rgextents, xfs_rgblock_t rextsize) { uint64_t rgblocks = (uint64_t)rgextents * rextsize; return xfs_highbit64(rgblocks - 1) + 1; } static int xfs_validate_sb_rtgroups( struct xfs_mount *mp, struct xfs_sb *sbp) { uint64_t groups; int rgblklog; if (sbp->sb_rextsize == 0) { xfs_warn(mp, "Realtime extent size must not be zero."); return -EINVAL; } if (sbp->sb_rgextents > XFS_MAX_RGBLOCKS / sbp->sb_rextsize) { xfs_warn(mp, "Realtime group size (%u) must be less than %u rt extents.", sbp->sb_rgextents, XFS_MAX_RGBLOCKS / sbp->sb_rextsize); return -EINVAL; } if (sbp->sb_rgextents < XFS_MIN_RGEXTENTS) { xfs_warn(mp, "Realtime group size (%u) must be at least %u rt extents.", sbp->sb_rgextents, XFS_MIN_RGEXTENTS); return -EINVAL; } if (sbp->sb_rgcount > XFS_MAX_RGNUMBER) { xfs_warn(mp, "Realtime groups (%u) must be less than %u.", sbp->sb_rgcount, XFS_MAX_RGNUMBER); return -EINVAL; } groups = howmany_64(sbp->sb_rextents, sbp->sb_rgextents); if (groups != sbp->sb_rgcount) { xfs_warn(mp, "Realtime groups (%u) do not cover the entire rt section; need (%llu) groups.", sbp->sb_rgcount, groups); return -EINVAL; } /* Exchange-range is required for fsr to work on realtime files */ if (!(sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_EXCHRANGE)) { xfs_warn(mp, "Realtime groups feature requires exchange-range support."); return -EINVAL; } rgblklog = xfs_compute_rgblklog(sbp->sb_rgextents, sbp->sb_rextsize); if (sbp->sb_rgblklog != rgblklog) { xfs_warn(mp, "Realtime group log (%d) does not match expected value (%d).", sbp->sb_rgblklog, rgblklog); return -EINVAL; } return 0; } /* Check the validity of the SB. */ STATIC int xfs_validate_sb_common( struct xfs_mount *mp, struct xfs_buf *bp, struct xfs_sb *sbp) { struct xfs_dsb *dsb = bp->b_addr; uint32_t agcount = 0; uint32_t rem; bool has_dalign; int error; if (!xfs_verify_magic(bp, dsb->sb_magicnum)) { xfs_warn(mp, "Superblock has bad magic number 0x%x. Not an XFS filesystem?", be32_to_cpu(dsb->sb_magicnum)); return -EWRONGFS; } if (!xfs_sb_good_version(sbp)) { xfs_warn(mp, "Superblock has unknown features enabled or corrupted feature masks."); return -EWRONGFS; } /* * Validate feature flags and state */ if (xfs_sb_is_v5(sbp)) { if (sbp->sb_blocksize < XFS_MIN_CRC_BLOCKSIZE) { xfs_notice(mp, "Block size (%u bytes) too small for Version 5 superblock (minimum %d bytes)", sbp->sb_blocksize, XFS_MIN_CRC_BLOCKSIZE); return -EFSCORRUPTED; } /* V5 has a separate project quota inode */ if (sbp->sb_qflags & (XFS_OQUOTA_ENFD | XFS_OQUOTA_CHKD)) { xfs_notice(mp, "Version 5 of Super block has XFS_OQUOTA bits."); return -EFSCORRUPTED; } /* * Full inode chunks must be aligned to inode chunk size when * sparse inodes are enabled to support the sparse chunk * allocation algorithm and prevent overlapping inode records. */ if (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_SPINODES) { uint32_t align; align = XFS_INODES_PER_CHUNK * sbp->sb_inodesize >> sbp->sb_blocklog; if (sbp->sb_inoalignmt != align) { xfs_warn(mp, "Inode block alignment (%u) must match chunk size (%u) for sparse inodes.", sbp->sb_inoalignmt, align); return -EINVAL; } if (sbp->sb_spino_align && (sbp->sb_spino_align > sbp->sb_inoalignmt || (sbp->sb_inoalignmt % sbp->sb_spino_align) != 0)) { xfs_warn(mp, "Sparse inode alignment (%u) is invalid, must be integer factor of (%u).", sbp->sb_spino_align, sbp->sb_inoalignmt); return -EINVAL; } } else if (sbp->sb_spino_align) { xfs_warn(mp, "Sparse inode alignment (%u) should be zero.", sbp->sb_spino_align); return -EINVAL; } if (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_METADIR) { if (memchr_inv(sbp->sb_pad, 0, sizeof(sbp->sb_pad))) { xfs_warn(mp, "Metadir superblock padding fields must be zero."); return -EINVAL; } error = xfs_validate_sb_rtgroups(mp, sbp); if (error) return error; } } else if (sbp->sb_qflags & (XFS_PQUOTA_ENFD | XFS_GQUOTA_ENFD | XFS_PQUOTA_CHKD | XFS_GQUOTA_CHKD)) { xfs_notice(mp, "Superblock earlier than Version 5 has XFS_{P|G}QUOTA_{ENFD|CHKD} bits."); return -EFSCORRUPTED; } if (unlikely( sbp->sb_logstart == 0 && mp->m_logdev_targp == mp->m_ddev_targp)) { xfs_warn(mp, "filesystem is marked as having an external log; " "specify logdev on the mount command line."); return -EINVAL; } if (unlikely( sbp->sb_logstart != 0 && mp->m_logdev_targp != mp->m_ddev_targp)) { xfs_warn(mp, "filesystem is marked as having an internal log; " "do not specify logdev on the mount command line."); return -EINVAL; } /* Compute agcount for this number of dblocks and agblocks */ if (sbp->sb_agblocks) { agcount = div_u64_rem(sbp->sb_dblocks, sbp->sb_agblocks, &rem); if (rem) agcount++; } /* * More sanity checking. Most of these were stolen directly from * xfs_repair. */ if (unlikely( sbp->sb_agcount <= 0 || sbp->sb_sectsize < XFS_MIN_SECTORSIZE || sbp->sb_sectsize > XFS_MAX_SECTORSIZE || sbp->sb_sectlog < XFS_MIN_SECTORSIZE_LOG || sbp->sb_sectlog > XFS_MAX_SECTORSIZE_LOG || sbp->sb_sectsize != (1 << sbp->sb_sectlog) || sbp->sb_blocksize < XFS_MIN_BLOCKSIZE || sbp->sb_blocksize > XFS_MAX_BLOCKSIZE || sbp->sb_blocklog < XFS_MIN_BLOCKSIZE_LOG || sbp->sb_blocklog > XFS_MAX_BLOCKSIZE_LOG || sbp->sb_blocksize != (1 << sbp->sb_blocklog) || sbp->sb_dirblklog + sbp->sb_blocklog > XFS_MAX_BLOCKSIZE_LOG || sbp->sb_inodesize < XFS_DINODE_MIN_SIZE || sbp->sb_inodesize > XFS_DINODE_MAX_SIZE || sbp->sb_inodelog < XFS_DINODE_MIN_LOG || sbp->sb_inodelog > XFS_DINODE_MAX_LOG || sbp->sb_inodesize != (1 << sbp->sb_inodelog) || sbp->sb_inopblock != howmany(sbp->sb_blocksize,sbp->sb_inodesize) || XFS_FSB_TO_B(mp, sbp->sb_agblocks) < XFS_MIN_AG_BYTES || XFS_FSB_TO_B(mp, sbp->sb_agblocks) > XFS_MAX_AG_BYTES || sbp->sb_agblklog != xfs_highbit32(sbp->sb_agblocks - 1) + 1 || agcount == 0 || agcount != sbp->sb_agcount || (sbp->sb_blocklog - sbp->sb_inodelog != sbp->sb_inopblog) || (sbp->sb_rextsize * sbp->sb_blocksize > XFS_MAX_RTEXTSIZE) || (sbp->sb_rextsize * sbp->sb_blocksize < XFS_MIN_RTEXTSIZE) || (sbp->sb_imax_pct > 100 /* zero sb_imax_pct is valid */) || sbp->sb_dblocks == 0 || sbp->sb_dblocks > XFS_MAX_DBLOCKS(sbp) || sbp->sb_dblocks < XFS_MIN_DBLOCKS(sbp) || sbp->sb_shared_vn != 0)) { xfs_notice(mp, "SB sanity check failed"); return -EFSCORRUPTED; } /* * Logs that are too large are not supported at all. Reject them * outright. Logs that are too small are tolerated on v4 filesystems, * but we can only check that when mounting the log. Hence we skip * those checks here. */ if (sbp->sb_logblocks > XFS_MAX_LOG_BLOCKS) { xfs_notice(mp, "Log size 0x%x blocks too large, maximum size is 0x%llx blocks", sbp->sb_logblocks, XFS_MAX_LOG_BLOCKS); return -EFSCORRUPTED; } if (XFS_FSB_TO_B(mp, sbp->sb_logblocks) > XFS_MAX_LOG_BYTES) { xfs_warn(mp, "log size 0x%llx bytes too large, maximum size is 0x%llx bytes", XFS_FSB_TO_B(mp, sbp->sb_logblocks), XFS_MAX_LOG_BYTES); return -EFSCORRUPTED; } /* * Do not allow filesystems with corrupted log sector or stripe units to * be mounted. We cannot safely size the iclogs or write to the log if * the log stripe unit is not valid. */ if (sbp->sb_versionnum & XFS_SB_VERSION_SECTORBIT) { if (sbp->sb_logsectsize != (1U << sbp->sb_logsectlog)) { xfs_notice(mp, "log sector size in bytes/log2 (0x%x/0x%x) must match", sbp->sb_logsectsize, 1U << sbp->sb_logsectlog); return -EFSCORRUPTED; } } else if (sbp->sb_logsectsize || sbp->sb_logsectlog) { xfs_notice(mp, "log sector size in bytes/log2 (0x%x/0x%x) are not zero", sbp->sb_logsectsize, sbp->sb_logsectlog); return -EFSCORRUPTED; } if (sbp->sb_logsunit > 1) { if (sbp->sb_logsunit % sbp->sb_blocksize) { xfs_notice(mp, "log stripe unit 0x%x bytes must be a multiple of block size", sbp->sb_logsunit); return -EFSCORRUPTED; } if (sbp->sb_logsunit > XLOG_MAX_RECORD_BSIZE) { xfs_notice(mp, "log stripe unit 0x%x bytes over maximum size (0x%x bytes)", sbp->sb_logsunit, XLOG_MAX_RECORD_BSIZE); return -EFSCORRUPTED; } } if (!xfs_validate_rt_geometry(sbp)) { xfs_notice(mp, "realtime %sgeometry check failed", sbp->sb_rblocks ? "" : "zeroed "); return -EFSCORRUPTED; } /* * Either (sb_unit and !hasdalign) or (!sb_unit and hasdalign) * would imply the image is corrupted. */ has_dalign = sbp->sb_versionnum & XFS_SB_VERSION_DALIGNBIT; if (!!sbp->sb_unit ^ has_dalign) { xfs_notice(mp, "SB stripe alignment sanity check failed"); return -EFSCORRUPTED; } if (!xfs_validate_stripe_geometry(mp, XFS_FSB_TO_B(mp, sbp->sb_unit), XFS_FSB_TO_B(mp, sbp->sb_width), 0, xfs_buf_daddr(bp) == XFS_SB_DADDR, false)) return -EFSCORRUPTED; /* * Currently only very few inode sizes are supported. */ switch (sbp->sb_inodesize) { case 256: case 512: case 1024: case 2048: break; default: xfs_warn(mp, "inode size of %d bytes not supported", sbp->sb_inodesize); return -ENOSYS; } return 0; } void xfs_sb_quota_from_disk(struct xfs_sb *sbp) { if (xfs_sb_is_v5(sbp) && (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_METADIR)) { sbp->sb_uquotino = NULLFSINO; sbp->sb_gquotino = NULLFSINO; sbp->sb_pquotino = NULLFSINO; return; } /* * older mkfs doesn't initialize quota inodes to NULLFSINO. This * leads to in-core values having two different values for a quota * inode to be invalid: 0 and NULLFSINO. Change it to a single value * NULLFSINO. * * Note that this change affect only the in-core values. These * values are not written back to disk unless any quota information * is written to the disk. Even in that case, sb_pquotino field is * not written to disk unless the superblock supports pquotino. */ if (sbp->sb_uquotino == 0) sbp->sb_uquotino = NULLFSINO; if (sbp->sb_gquotino == 0) sbp->sb_gquotino = NULLFSINO; if (sbp->sb_pquotino == 0) sbp->sb_pquotino = NULLFSINO; /* * We need to do these manipilations only if we are working * with an older version of on-disk superblock. */ if (xfs_sb_is_v5(sbp)) return; if (sbp->sb_qflags & XFS_OQUOTA_ENFD) sbp->sb_qflags |= (sbp->sb_qflags & XFS_PQUOTA_ACCT) ? XFS_PQUOTA_ENFD : XFS_GQUOTA_ENFD; if (sbp->sb_qflags & XFS_OQUOTA_CHKD) sbp->sb_qflags |= (sbp->sb_qflags & XFS_PQUOTA_ACCT) ? XFS_PQUOTA_CHKD : XFS_GQUOTA_CHKD; sbp->sb_qflags &= ~(XFS_OQUOTA_ENFD | XFS_OQUOTA_CHKD); if (sbp->sb_qflags & XFS_PQUOTA_ACCT && sbp->sb_gquotino != NULLFSINO) { /* * In older version of superblock, on-disk superblock only * has sb_gquotino, and in-core superblock has both sb_gquotino * and sb_pquotino. But, only one of them is supported at any * point of time. So, if PQUOTA is set in disk superblock, * copy over sb_gquotino to sb_pquotino. The NULLFSINO test * above is to make sure we don't do this twice and wipe them * both out! */ sbp->sb_pquotino = sbp->sb_gquotino; sbp->sb_gquotino = NULLFSINO; } } static void __xfs_sb_from_disk( struct xfs_sb *to, struct xfs_dsb *from, bool convert_xquota) { to->sb_magicnum = be32_to_cpu(from->sb_magicnum); to->sb_blocksize = be32_to_cpu(from->sb_blocksize); to->sb_dblocks = be64_to_cpu(from->sb_dblocks); to->sb_rblocks = be64_to_cpu(from->sb_rblocks); to->sb_rextents = be64_to_cpu(from->sb_rextents); memcpy(&to->sb_uuid, &from->sb_uuid, sizeof(to->sb_uuid)); to->sb_logstart = be64_to_cpu(from->sb_logstart); to->sb_rootino = be64_to_cpu(from->sb_rootino); to->sb_rbmino = be64_to_cpu(from->sb_rbmino); to->sb_rsumino = be64_to_cpu(from->sb_rsumino); to->sb_rextsize = be32_to_cpu(from->sb_rextsize); to->sb_agblocks = be32_to_cpu(from->sb_agblocks); to->sb_agcount = be32_to_cpu(from->sb_agcount); to->sb_rbmblocks = be32_to_cpu(from->sb_rbmblocks); to->sb_logblocks = be32_to_cpu(from->sb_logblocks); to->sb_versionnum = be16_to_cpu(from->sb_versionnum); to->sb_sectsize = be16_to_cpu(from->sb_sectsize); to->sb_inodesize = be16_to_cpu(from->sb_inodesize); to->sb_inopblock = be16_to_cpu(from->sb_inopblock); memcpy(&to->sb_fname, &from->sb_fname, sizeof(to->sb_fname)); to->sb_blocklog = from->sb_blocklog; to->sb_sectlog = from->sb_sectlog; to->sb_inodelog = from->sb_inodelog; to->sb_inopblog = from->sb_inopblog; to->sb_agblklog = from->sb_agblklog; to->sb_rextslog = from->sb_rextslog; to->sb_inprogress = from->sb_inprogress; to->sb_imax_pct = from->sb_imax_pct; to->sb_icount = be64_to_cpu(from->sb_icount); to->sb_ifree = be64_to_cpu(from->sb_ifree); to->sb_fdblocks = be64_to_cpu(from->sb_fdblocks); to->sb_frextents = be64_to_cpu(from->sb_frextents); to->sb_uquotino = be64_to_cpu(from->sb_uquotino); to->sb_gquotino = be64_to_cpu(from->sb_gquotino); to->sb_qflags = be16_to_cpu(from->sb_qflags); to->sb_flags = from->sb_flags; to->sb_shared_vn = from->sb_shared_vn; to->sb_inoalignmt = be32_to_cpu(from->sb_inoalignmt); to->sb_unit = be32_to_cpu(from->sb_unit); to->sb_width = be32_to_cpu(from->sb_width); to->sb_dirblklog = from->sb_dirblklog; to->sb_logsectlog = from->sb_logsectlog; to->sb_logsectsize = be16_to_cpu(from->sb_logsectsize); to->sb_logsunit = be32_to_cpu(from->sb_logsunit); to->sb_features2 = be32_to_cpu(from->sb_features2); to->sb_bad_features2 = be32_to_cpu(from->sb_bad_features2); to->sb_features_compat = be32_to_cpu(from->sb_features_compat); to->sb_features_ro_compat = be32_to_cpu(from->sb_features_ro_compat); to->sb_features_incompat = be32_to_cpu(from->sb_features_incompat); to->sb_features_log_incompat = be32_to_cpu(from->sb_features_log_incompat); /* crc is only used on disk, not in memory; just init to 0 here. */ to->sb_crc = 0; to->sb_spino_align = be32_to_cpu(from->sb_spino_align); to->sb_pquotino = be64_to_cpu(from->sb_pquotino); to->sb_lsn = be64_to_cpu(from->sb_lsn); /* * sb_meta_uuid is only on disk if it differs from sb_uuid and the * feature flag is set; if not set we keep it only in memory. */ if (xfs_sb_is_v5(to) && (to->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_META_UUID)) uuid_copy(&to->sb_meta_uuid, &from->sb_meta_uuid); else uuid_copy(&to->sb_meta_uuid, &from->sb_uuid); /* Convert on-disk flags to in-memory flags? */ if (convert_xquota) xfs_sb_quota_from_disk(to); if (to->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_METADIR) { to->sb_metadirino = be64_to_cpu(from->sb_metadirino); to->sb_rgblklog = from->sb_rgblklog; memcpy(to->sb_pad, from->sb_pad, sizeof(to->sb_pad)); to->sb_rgcount = be32_to_cpu(from->sb_rgcount); to->sb_rgextents = be32_to_cpu(from->sb_rgextents); to->sb_rbmino = NULLFSINO; to->sb_rsumino = NULLFSINO; } else { to->sb_metadirino = NULLFSINO; to->sb_rgcount = 1; to->sb_rgextents = 0; } } void xfs_sb_from_disk( struct xfs_sb *to, struct xfs_dsb *from) { __xfs_sb_from_disk(to, from, true); } static void xfs_sb_quota_to_disk( struct xfs_dsb *to, struct xfs_sb *from) { uint16_t qflags = from->sb_qflags; if (xfs_sb_is_v5(from) && (from->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_METADIR)) { to->sb_qflags = cpu_to_be16(from->sb_qflags); to->sb_uquotino = cpu_to_be64(0); to->sb_gquotino = cpu_to_be64(0); to->sb_pquotino = cpu_to_be64(0); return; } to->sb_uquotino = cpu_to_be64(from->sb_uquotino); /* * The in-memory superblock quota state matches the v5 on-disk format so * just write them out and return */ if (xfs_sb_is_v5(from)) { to->sb_qflags = cpu_to_be16(from->sb_qflags); to->sb_gquotino = cpu_to_be64(from->sb_gquotino); to->sb_pquotino = cpu_to_be64(from->sb_pquotino); return; } /* * For older superblocks (v4), the in-core version of sb_qflags do not * have XFS_OQUOTA_* flags, whereas the on-disk version does. So, * convert incore XFS_{PG}QUOTA_* flags to on-disk XFS_OQUOTA_* flags. */ qflags &= ~(XFS_PQUOTA_ENFD | XFS_PQUOTA_CHKD | XFS_GQUOTA_ENFD | XFS_GQUOTA_CHKD); if (from->sb_qflags & (XFS_PQUOTA_ENFD | XFS_GQUOTA_ENFD)) qflags |= XFS_OQUOTA_ENFD; if (from->sb_qflags & (XFS_PQUOTA_CHKD | XFS_GQUOTA_CHKD)) qflags |= XFS_OQUOTA_CHKD; to->sb_qflags = cpu_to_be16(qflags); /* * GQUOTINO and PQUOTINO cannot be used together in versions * of superblock that do not have pquotino. from->sb_flags * tells us which quota is active and should be copied to * disk. If neither are active, we should NULL the inode. * * In all cases, the separate pquotino must remain 0 because it * is beyond the "end" of the valid non-pquotino superblock. */ if (from->sb_qflags & XFS_GQUOTA_ACCT) to->sb_gquotino = cpu_to_be64(from->sb_gquotino); else if (from->sb_qflags & XFS_PQUOTA_ACCT) to->sb_gquotino = cpu_to_be64(from->sb_pquotino); else { /* * We can't rely on just the fields being logged to tell us * that it is safe to write NULLFSINO - we should only do that * if quotas are not actually enabled. Hence only write * NULLFSINO if both in-core quota inodes are NULL. */ if (from->sb_gquotino == NULLFSINO && from->sb_pquotino == NULLFSINO) to->sb_gquotino = cpu_to_be64(NULLFSINO); } to->sb_pquotino = 0; } void xfs_sb_to_disk( struct xfs_dsb *to, struct xfs_sb *from) { xfs_sb_quota_to_disk(to, from); to->sb_magicnum = cpu_to_be32(from->sb_magicnum); to->sb_blocksize = cpu_to_be32(from->sb_blocksize); to->sb_dblocks = cpu_to_be64(from->sb_dblocks); to->sb_rblocks = cpu_to_be64(from->sb_rblocks); to->sb_rextents = cpu_to_be64(from->sb_rextents); memcpy(&to->sb_uuid, &from->sb_uuid, sizeof(to->sb_uuid)); to->sb_logstart = cpu_to_be64(from->sb_logstart); to->sb_rootino = cpu_to_be64(from->sb_rootino); to->sb_rbmino = cpu_to_be64(from->sb_rbmino); to->sb_rsumino = cpu_to_be64(from->sb_rsumino); to->sb_rextsize = cpu_to_be32(from->sb_rextsize); to->sb_agblocks = cpu_to_be32(from->sb_agblocks); to->sb_agcount = cpu_to_be32(from->sb_agcount); to->sb_rbmblocks = cpu_to_be32(from->sb_rbmblocks); to->sb_logblocks = cpu_to_be32(from->sb_logblocks); to->sb_versionnum = cpu_to_be16(from->sb_versionnum); to->sb_sectsize = cpu_to_be16(from->sb_sectsize); to->sb_inodesize = cpu_to_be16(from->sb_inodesize); to->sb_inopblock = cpu_to_be16(from->sb_inopblock); memcpy(&to->sb_fname, &from->sb_fname, sizeof(to->sb_fname)); to->sb_blocklog = from->sb_blocklog; to->sb_sectlog = from->sb_sectlog; to->sb_inodelog = from->sb_inodelog; to->sb_inopblog = from->sb_inopblog; to->sb_agblklog = from->sb_agblklog; to->sb_rextslog = from->sb_rextslog; to->sb_inprogress = from->sb_inprogress; to->sb_imax_pct = from->sb_imax_pct; to->sb_icount = cpu_to_be64(from->sb_icount); to->sb_ifree = cpu_to_be64(from->sb_ifree); to->sb_fdblocks = cpu_to_be64(from->sb_fdblocks); to->sb_frextents = cpu_to_be64(from->sb_frextents); to->sb_flags = from->sb_flags; to->sb_shared_vn = from->sb_shared_vn; to->sb_inoalignmt = cpu_to_be32(from->sb_inoalignmt); to->sb_unit = cpu_to_be32(from->sb_unit); to->sb_width = cpu_to_be32(from->sb_width); to->sb_dirblklog = from->sb_dirblklog; to->sb_logsectlog = from->sb_logsectlog; to->sb_logsectsize = cpu_to_be16(from->sb_logsectsize); to->sb_logsunit = cpu_to_be32(from->sb_logsunit); /* * We need to ensure that bad_features2 always matches features2. * Hence we enforce that here rather than having to remember to do it * everywhere else that updates features2. */ from->sb_bad_features2 = from->sb_features2; to->sb_features2 = cpu_to_be32(from->sb_features2); to->sb_bad_features2 = cpu_to_be32(from->sb_bad_features2); if (!xfs_sb_is_v5(from)) return; to->sb_features_compat = cpu_to_be32(from->sb_features_compat); to->sb_features_ro_compat = cpu_to_be32(from->sb_features_ro_compat); to->sb_features_incompat = cpu_to_be32(from->sb_features_incompat); to->sb_features_log_incompat = cpu_to_be32(from->sb_features_log_incompat); to->sb_spino_align = cpu_to_be32(from->sb_spino_align); to->sb_lsn = cpu_to_be64(from->sb_lsn); if (from->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_META_UUID) uuid_copy(&to->sb_meta_uuid, &from->sb_meta_uuid); if (from->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_METADIR) { to->sb_metadirino = cpu_to_be64(from->sb_metadirino); to->sb_rgblklog = from->sb_rgblklog; memset(to->sb_pad, 0, sizeof(to->sb_pad)); to->sb_rgcount = cpu_to_be32(from->sb_rgcount); to->sb_rgextents = cpu_to_be32(from->sb_rgextents); to->sb_rbmino = cpu_to_be64(0); to->sb_rsumino = cpu_to_be64(0); } } /* * If the superblock has the CRC feature bit set or the CRC field is non-null, * check that the CRC is valid. We check the CRC field is non-null because a * single bit error could clear the feature bit and unused parts of the * superblock are supposed to be zero. Hence a non-null crc field indicates that * we've potentially lost a feature bit and we should check it anyway. * * However, past bugs (i.e. in growfs) left non-zeroed regions beyond the * last field in V4 secondary superblocks. So for secondary superblocks, * we are more forgiving, and ignore CRC failures if the primary doesn't * indicate that the fs version is V5. */ static void xfs_sb_read_verify( struct xfs_buf *bp) { struct xfs_sb sb; struct xfs_mount *mp = bp->b_mount; struct xfs_dsb *dsb = bp->b_addr; int error; /* * open code the version check to avoid needing to convert the entire * superblock from disk order just to check the version number */ if (dsb->sb_magicnum == cpu_to_be32(XFS_SB_MAGIC) && (((be16_to_cpu(dsb->sb_versionnum) & XFS_SB_VERSION_NUMBITS) == XFS_SB_VERSION_5) || dsb->sb_crc != 0)) { if (!xfs_buf_verify_cksum(bp, XFS_SB_CRC_OFF)) { /* Only fail bad secondaries on a known V5 filesystem */ if (xfs_buf_daddr(bp) == XFS_SB_DADDR || xfs_has_crc(mp)) { error = -EFSBADCRC; goto out_error; } } } /* * Check all the superblock fields. Don't byteswap the xquota flags * because _verify_common checks the on-disk values. */ __xfs_sb_from_disk(&sb, dsb, false); error = xfs_validate_sb_common(mp, bp, &sb); if (error) goto out_error; error = xfs_validate_sb_read(mp, &sb); out_error: if (error == -EFSCORRUPTED || error == -EFSBADCRC) xfs_verifier_error(bp, error, __this_address); else if (error) xfs_buf_ioerror(bp, error); } /* * We may be probed for a filesystem match, so we may not want to emit * messages when the superblock buffer is not actually an XFS superblock. * If we find an XFS superblock, then run a normal, noisy mount because we are * really going to mount it and want to know about errors. */ static void xfs_sb_quiet_read_verify( struct xfs_buf *bp) { struct xfs_dsb *dsb = bp->b_addr; if (dsb->sb_magicnum == cpu_to_be32(XFS_SB_MAGIC)) { /* XFS filesystem, verify noisily! */ xfs_sb_read_verify(bp); return; } /* quietly fail */ xfs_buf_ioerror(bp, -EWRONGFS); } static void xfs_sb_write_verify( struct xfs_buf *bp) { struct xfs_sb sb; struct xfs_mount *mp = bp->b_mount; struct xfs_buf_log_item *bip = bp->b_log_item; struct xfs_dsb *dsb = bp->b_addr; int error; /* * Check all the superblock fields. Don't byteswap the xquota flags * because _verify_common checks the on-disk values. */ __xfs_sb_from_disk(&sb, dsb, false); error = xfs_validate_sb_common(mp, bp, &sb); if (error) goto out_error; error = xfs_validate_sb_write(mp, bp, &sb); if (error) goto out_error; if (!xfs_sb_is_v5(&sb)) return; if (bip) dsb->sb_lsn = cpu_to_be64(bip->bli_item.li_lsn); xfs_buf_update_cksum(bp, XFS_SB_CRC_OFF); return; out_error: xfs_verifier_error(bp, error, __this_address); } const struct xfs_buf_ops xfs_sb_buf_ops = { .name = "xfs_sb", .magic = { cpu_to_be32(XFS_SB_MAGIC), cpu_to_be32(XFS_SB_MAGIC) }, .verify_read = xfs_sb_read_verify, .verify_write = xfs_sb_write_verify, }; const struct xfs_buf_ops xfs_sb_quiet_buf_ops = { .name = "xfs_sb_quiet", .magic = { cpu_to_be32(XFS_SB_MAGIC), cpu_to_be32(XFS_SB_MAGIC) }, .verify_read = xfs_sb_quiet_read_verify, .verify_write = xfs_sb_write_verify, }; /* Compute cached rt geometry from the incore sb. */ void xfs_sb_mount_rextsize( struct xfs_mount *mp, struct xfs_sb *sbp) { struct xfs_groups *rgs = &mp->m_groups[XG_TYPE_RTG]; mp->m_rtxblklog = log2_if_power2(sbp->sb_rextsize); mp->m_rtxblkmask = mask64_if_power2(sbp->sb_rextsize); if (xfs_sb_is_v5(sbp) && (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_METADIR)) { rgs->blocks = sbp->sb_rgextents * sbp->sb_rextsize; rgs->blklog = mp->m_sb.sb_rgblklog; rgs->blkmask = xfs_mask32lo(mp->m_sb.sb_rgblklog); } else { rgs->blocks = 0; rgs->blklog = 0; rgs->blkmask = (uint64_t)-1; } } /* Update incore sb rt extent size, then recompute the cached rt geometry. */ void xfs_mount_sb_set_rextsize( struct xfs_mount *mp, struct xfs_sb *sbp, xfs_agblock_t rextsize) { sbp->sb_rextsize = rextsize; if (xfs_sb_is_v5(sbp) && (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_METADIR)) sbp->sb_rgblklog = xfs_compute_rgblklog(sbp->sb_rgextents, rextsize); xfs_sb_mount_rextsize(mp, sbp); } /* * xfs_mount_common * * Mount initialization code establishing various mount * fields from the superblock associated with the given * mount structure. * * Inode geometry are calculated in xfs_ialloc_setup_geometry. */ void xfs_sb_mount_common( struct xfs_mount *mp, struct xfs_sb *sbp) { struct xfs_groups *ags = &mp->m_groups[XG_TYPE_AG]; mp->m_agfrotor = 0; atomic_set(&mp->m_agirotor, 0); mp->m_maxagi = mp->m_sb.sb_agcount; mp->m_blkbit_log = sbp->sb_blocklog + XFS_NBBYLOG; mp->m_blkbb_log = sbp->sb_blocklog - BBSHIFT; mp->m_sectbb_log = sbp->sb_sectlog - BBSHIFT; mp->m_agno_log = xfs_highbit32(sbp->sb_agcount - 1) + 1; mp->m_blockmask = sbp->sb_blocksize - 1; mp->m_blockwsize = xfs_rtbmblock_size(sbp) >> XFS_WORDLOG; mp->m_rtx_per_rbmblock = mp->m_blockwsize << XFS_NBWORDLOG; ags->blocks = mp->m_sb.sb_agblocks; ags->blklog = mp->m_sb.sb_agblklog; ags->blkmask = xfs_mask32lo(mp->m_sb.sb_agblklog); xfs_sb_mount_rextsize(mp, sbp); mp->m_alloc_mxr[0] = xfs_allocbt_maxrecs(mp, sbp->sb_blocksize, true); mp->m_alloc_mxr[1] = xfs_allocbt_maxrecs(mp, sbp->sb_blocksize, false); mp->m_alloc_mnr[0] = mp->m_alloc_mxr[0] / 2; mp->m_alloc_mnr[1] = mp->m_alloc_mxr[1] / 2; mp->m_bmap_dmxr[0] = xfs_bmbt_maxrecs(mp, sbp->sb_blocksize, true); mp->m_bmap_dmxr[1] = xfs_bmbt_maxrecs(mp, sbp->sb_blocksize, false); mp->m_bmap_dmnr[0] = mp->m_bmap_dmxr[0] / 2; mp->m_bmap_dmnr[1] = mp->m_bmap_dmxr[1] / 2; mp->m_rmap_mxr[0] = xfs_rmapbt_maxrecs(mp, sbp->sb_blocksize, true); mp->m_rmap_mxr[1] = xfs_rmapbt_maxrecs(mp, sbp->sb_blocksize, false); mp->m_rmap_mnr[0] = mp->m_rmap_mxr[0] / 2; mp->m_rmap_mnr[1] = mp->m_rmap_mxr[1] / 2; mp->m_refc_mxr[0] = xfs_refcountbt_maxrecs(mp, sbp->sb_blocksize, true); mp->m_refc_mxr[1] = xfs_refcountbt_maxrecs(mp, sbp->sb_blocksize, false); mp->m_refc_mnr[0] = mp->m_refc_mxr[0] / 2; mp->m_refc_mnr[1] = mp->m_refc_mxr[1] / 2; mp->m_bsize = XFS_FSB_TO_BB(mp, 1); mp->m_alloc_set_aside = xfs_alloc_set_aside(mp); mp->m_ag_max_usable = xfs_alloc_ag_max_usable(mp); } /* * xfs_log_sb() can be used to copy arbitrary changes to the in-core superblock * into the superblock buffer to be logged. It does not provide the higher * level of locking that is needed to protect the in-core superblock from * concurrent access. */ void xfs_log_sb( struct xfs_trans *tp) { struct xfs_mount *mp = tp->t_mountp; struct xfs_buf *bp = xfs_trans_getsb(tp); /* * Lazy sb counters don't update the in-core superblock so do that now. * If this is at unmount, the counters will be exactly correct, but at * any other time they will only be ballpark correct because of * reservations that have been taken out percpu counters. If we have an * unclean shutdown, this will be corrected by log recovery rebuilding * the counters from the AGF block counts. */ if (xfs_has_lazysbcount(mp)) { mp->m_sb.sb_icount = percpu_counter_sum_positive(&mp->m_icount); mp->m_sb.sb_ifree = min_t(uint64_t, percpu_counter_sum_positive(&mp->m_ifree), mp->m_sb.sb_icount); mp->m_sb.sb_fdblocks = percpu_counter_sum_positive(&mp->m_fdblocks); } /* * sb_frextents was added to the lazy sb counters when the rt groups * feature was introduced. This counter can go negative due to the way * we handle nearly-lockless reservations, so we must use the _positive * variant here to avoid writing out nonsense frextents. */ if (xfs_has_rtgroups(mp)) mp->m_sb.sb_frextents = percpu_counter_sum_positive(&mp->m_frextents); xfs_sb_to_disk(bp->b_addr, &mp->m_sb); xfs_trans_buf_set_type(tp, bp, XFS_BLFT_SB_BUF); xfs_trans_log_buf(tp, bp, 0, sizeof(struct xfs_dsb) - 1); } /* * xfs_sync_sb * * Sync the superblock to disk. * * Note that the caller is responsible for checking the frozen state of the * filesystem. This procedure uses the non-blocking transaction allocator and * thus will allow modifications to a frozen fs. This is required because this * code can be called during the process of freezing where use of the high-level * allocator would deadlock. */ int xfs_sync_sb( struct xfs_mount *mp, bool wait) { struct xfs_trans *tp; int error; error = xfs_trans_alloc(mp, &M_RES(mp)->tr_sb, 0, 0, XFS_TRANS_NO_WRITECOUNT, &tp); if (error) return error; xfs_log_sb(tp); if (wait) xfs_trans_set_sync(tp); return xfs_trans_commit(tp); } /* * Update all the secondary superblocks to match the new state of the primary. * Because we are completely overwriting all the existing fields in the * secondary superblock buffers, there is no need to read them in from disk. * Just get a new buffer, stamp it and write it. * * The sb buffers need to be cached here so that we serialise against other * operations that access the secondary superblocks, but we don't want to keep * them in memory once it is written so we mark it as a one-shot buffer. */ int xfs_update_secondary_sbs( struct xfs_mount *mp) { struct xfs_perag *pag = NULL; int saved_error = 0; int error = 0; LIST_HEAD (buffer_list); /* update secondary superblocks. */ while ((pag = xfs_perag_next_from(mp, pag, 1))) { struct xfs_buf *bp; error = xfs_buf_get(mp->m_ddev_targp, XFS_AG_DADDR(mp, pag_agno(pag), XFS_SB_DADDR), XFS_FSS_TO_BB(mp, 1), &bp); /* * If we get an error reading or writing alternate superblocks, * continue. xfs_repair chooses the "best" superblock based * on most matches; if we break early, we'll leave more * superblocks un-updated than updated, and xfs_repair may * pick them over the properly-updated primary. */ if (error) { xfs_warn(mp, "error allocating secondary superblock for ag %d", pag_agno(pag)); if (!saved_error) saved_error = error; continue; } bp->b_ops = &xfs_sb_buf_ops; xfs_buf_oneshot(bp); xfs_buf_zero(bp, 0, BBTOB(bp->b_length)); xfs_sb_to_disk(bp->b_addr, &mp->m_sb); xfs_buf_delwri_queue(bp, &buffer_list); xfs_buf_relse(bp); /* don't hold too many buffers at once */ if (pag_agno(pag) % 16) continue; error = xfs_buf_delwri_submit(&buffer_list); if (error) { xfs_warn(mp, "write error %d updating a secondary superblock near ag %d", error, pag_agno(pag)); if (!saved_error) saved_error = error; continue; } } error = xfs_buf_delwri_submit(&buffer_list); if (error) xfs_warn(mp, "error %d writing secondary superblocks", error); return saved_error ? saved_error : error; } /* * Same behavior as xfs_sync_sb, except that it is always synchronous and it * also writes the superblock buffer to disk sector 0 immediately. */ int xfs_sync_sb_buf( struct xfs_mount *mp, bool update_rtsb) { struct xfs_trans *tp; struct xfs_buf *bp; struct xfs_buf *rtsb_bp = NULL; int error; error = xfs_trans_alloc(mp, &M_RES(mp)->tr_sb, 0, 0, 0, &tp); if (error) return error; bp = xfs_trans_getsb(tp); xfs_log_sb(tp); xfs_trans_bhold(tp, bp); if (update_rtsb) { rtsb_bp = xfs_log_rtsb(tp, bp); if (rtsb_bp) xfs_trans_bhold(tp, rtsb_bp); } xfs_trans_set_sync(tp); error = xfs_trans_commit(tp); if (error) goto out; /* * write out the sb buffer to get the changes to disk */ error = xfs_bwrite(bp); if (!error && rtsb_bp) error = xfs_bwrite(rtsb_bp); out: if (rtsb_bp) xfs_buf_relse(rtsb_bp); xfs_buf_relse(bp); return error; } void xfs_fs_geometry( struct xfs_mount *mp, struct xfs_fsop_geom *geo, int struct_version) { struct xfs_sb *sbp = &mp->m_sb; memset(geo, 0, sizeof(struct xfs_fsop_geom)); geo->blocksize = sbp->sb_blocksize; geo->rtextsize = sbp->sb_rextsize; geo->agblocks = sbp->sb_agblocks; geo->agcount = sbp->sb_agcount; geo->logblocks = sbp->sb_logblocks; geo->sectsize = sbp->sb_sectsize; geo->inodesize = sbp->sb_inodesize; geo->imaxpct = sbp->sb_imax_pct; geo->datablocks = sbp->sb_dblocks; geo->rtblocks = sbp->sb_rblocks; geo->rtextents = sbp->sb_rextents; geo->logstart = sbp->sb_logstart; BUILD_BUG_ON(sizeof(geo->uuid) != sizeof(sbp->sb_uuid)); memcpy(geo->uuid, &sbp->sb_uuid, sizeof(sbp->sb_uuid)); if (struct_version < 2) return; geo->sunit = sbp->sb_unit; geo->swidth = sbp->sb_width; if (struct_version < 3) return; geo->version = XFS_FSOP_GEOM_VERSION; geo->flags = XFS_FSOP_GEOM_FLAGS_NLINK | XFS_FSOP_GEOM_FLAGS_DIRV2 | XFS_FSOP_GEOM_FLAGS_EXTFLG; if (xfs_has_attr(mp)) geo->flags |= XFS_FSOP_GEOM_FLAGS_ATTR; if (xfs_has_quota(mp)) geo->flags |= XFS_FSOP_GEOM_FLAGS_QUOTA; if (xfs_has_align(mp)) geo->flags |= XFS_FSOP_GEOM_FLAGS_IALIGN; if (xfs_has_dalign(mp)) geo->flags |= XFS_FSOP_GEOM_FLAGS_DALIGN; if (xfs_has_asciici(mp)) geo->flags |= XFS_FSOP_GEOM_FLAGS_DIRV2CI; if (xfs_has_lazysbcount(mp)) geo->flags |= XFS_FSOP_GEOM_FLAGS_LAZYSB; if (xfs_has_attr2(mp)) geo->flags |= XFS_FSOP_GEOM_FLAGS_ATTR2; if (xfs_has_projid32(mp)) geo->flags |= XFS_FSOP_GEOM_FLAGS_PROJID32; if (xfs_has_crc(mp)) geo->flags |= XFS_FSOP_GEOM_FLAGS_V5SB; if (xfs_has_ftype(mp)) geo->flags |= XFS_FSOP_GEOM_FLAGS_FTYPE; if (xfs_has_finobt(mp)) geo->flags |= XFS_FSOP_GEOM_FLAGS_FINOBT; if (xfs_has_sparseinodes(mp)) geo->flags |= XFS_FSOP_GEOM_FLAGS_SPINODES; if (xfs_has_rmapbt(mp)) geo->flags |= XFS_FSOP_GEOM_FLAGS_RMAPBT; if (xfs_has_reflink(mp)) geo->flags |= XFS_FSOP_GEOM_FLAGS_REFLINK; if (xfs_has_bigtime(mp)) geo->flags |= XFS_FSOP_GEOM_FLAGS_BIGTIME; if (xfs_has_inobtcounts(mp)) geo->flags |= XFS_FSOP_GEOM_FLAGS_INOBTCNT; if (xfs_has_parent(mp)) geo->flags |= XFS_FSOP_GEOM_FLAGS_PARENT; if (xfs_has_sector(mp)) { geo->flags |= XFS_FSOP_GEOM_FLAGS_SECTOR; geo->logsectsize = sbp->sb_logsectsize; } else { geo->logsectsize = BBSIZE; } if (xfs_has_large_extent_counts(mp)) geo->flags |= XFS_FSOP_GEOM_FLAGS_NREXT64; if (xfs_has_exchange_range(mp)) geo->flags |= XFS_FSOP_GEOM_FLAGS_EXCHANGE_RANGE; if (xfs_has_metadir(mp)) geo->flags |= XFS_FSOP_GEOM_FLAGS_METADIR; geo->rtsectsize = sbp->sb_blocksize; geo->dirblocksize = xfs_dir2_dirblock_bytes(sbp); if (struct_version < 4) return; if (xfs_has_logv2(mp)) geo->flags |= XFS_FSOP_GEOM_FLAGS_LOGV2; geo->logsunit = sbp->sb_logsunit; if (struct_version < 5) return; geo->version = XFS_FSOP_GEOM_VERSION_V5; if (xfs_has_rtgroups(mp)) { geo->rgcount = sbp->sb_rgcount; geo->rgextents = sbp->sb_rgextents; } } /* Read a secondary superblock. */ int xfs_sb_read_secondary( struct xfs_mount *mp, struct xfs_trans *tp, xfs_agnumber_t agno, struct xfs_buf **bpp) { struct xfs_buf *bp; int error; ASSERT(agno != 0 && agno != NULLAGNUMBER); error = xfs_trans_read_buf(mp, tp, mp->m_ddev_targp, XFS_AG_DADDR(mp, agno, XFS_SB_BLOCK(mp)), XFS_FSS_TO_BB(mp, 1), 0, &bp, &xfs_sb_buf_ops); if (xfs_metadata_is_sick(error)) xfs_agno_mark_sick(mp, agno, XFS_SICK_AG_SB); if (error) return error; xfs_buf_set_ref(bp, XFS_SSB_REF); *bpp = bp; return 0; } /* Get an uninitialised secondary superblock buffer. */ int xfs_sb_get_secondary( struct xfs_mount *mp, struct xfs_trans *tp, xfs_agnumber_t agno, struct xfs_buf **bpp) { struct xfs_buf *bp; int error; ASSERT(agno != 0 && agno != NULLAGNUMBER); error = xfs_trans_get_buf(tp, mp->m_ddev_targp, XFS_AG_DADDR(mp, agno, XFS_SB_BLOCK(mp)), XFS_FSS_TO_BB(mp, 1), 0, &bp); if (error) return error; bp->b_ops = &xfs_sb_buf_ops; xfs_buf_oneshot(bp); *bpp = bp; return 0; } /* * sunit, swidth, sectorsize(optional with 0) should be all in bytes, so users * won't be confused by values in error messages. This function returns false * if the stripe geometry is invalid and the caller is unable to repair the * stripe configuration later in the mount process. */ bool xfs_validate_stripe_geometry( struct xfs_mount *mp, __s64 sunit, __s64 swidth, int sectorsize, bool may_repair, bool silent) { if (swidth > INT_MAX) { if (!silent) xfs_notice(mp, "stripe width (%lld) is too large", swidth); goto check_override; } if (sunit > swidth) { if (!silent) xfs_notice(mp, "stripe unit (%lld) is larger than the stripe width (%lld)", sunit, swidth); goto check_override; } if (sectorsize && (int)sunit % sectorsize) { if (!silent) xfs_notice(mp, "stripe unit (%lld) must be a multiple of the sector size (%d)", sunit, sectorsize); goto check_override; } if (sunit && !swidth) { if (!silent) xfs_notice(mp, "invalid stripe unit (%lld) and stripe width of 0", sunit); goto check_override; } if (!sunit && swidth) { if (!silent) xfs_notice(mp, "invalid stripe width (%lld) and stripe unit of 0", swidth); goto check_override; } if (sunit && (int)swidth % (int)sunit) { if (!silent) xfs_notice(mp, "stripe width (%lld) must be a multiple of the stripe unit (%lld)", swidth, sunit); goto check_override; } return true; check_override: if (!may_repair) return false; /* * During mount, mp->m_dalign will not be set unless the sunit mount * option was set. If it was set, ignore the bad stripe alignment values * and allow the validation and overwrite later in the mount process to * attempt to overwrite the bad stripe alignment values with the values * supplied by mount options. */ if (!mp->m_dalign) return false; if (!silent) xfs_notice(mp, "Will try to correct with specified mount options sunit (%d) and swidth (%d)", BBTOB(mp->m_dalign), BBTOB(mp->m_swidth)); return true; } /* * Compute the maximum level number of the realtime summary file, as defined by * mkfs. The historic use of highbit32 on a 64-bit quantity prohibited correct * use of rt volumes with more than 2^32 extents. */ uint8_t xfs_compute_rextslog( xfs_rtbxlen_t rtextents) { if (!rtextents) return 0; return xfs_highbit64(rtextents); }
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