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path: root/fs/xfs/libxfs/xfs_sb.c
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Diffstat (limited to 'fs/xfs/libxfs/xfs_sb.c')
-rw-r--r--fs/xfs/libxfs/xfs_sb.c263
1 files changed, 188 insertions, 75 deletions
diff --git a/fs/xfs/libxfs/xfs_sb.c b/fs/xfs/libxfs/xfs_sb.c
index 04f5386446db..e58349be78bd 100644
--- a/fs/xfs/libxfs/xfs_sb.c
+++ b/fs/xfs/libxfs/xfs_sb.c
@@ -30,13 +30,110 @@
* Physical superblock buffer manipulations. Shared with libxfs in userspace.
*/
+/*
+ * We support all XFS versions newer than a v4 superblock with V2 directories.
+ */
+bool
+xfs_sb_good_version(
+ struct xfs_sb *sbp)
+{
+ /* all v5 filesystems are supported */
+ if (xfs_sb_is_v5(sbp))
+ return true;
+
+ /* versions prior to v4 are not supported */
+ if (XFS_SB_VERSION_NUM(sbp) < XFS_SB_VERSION_4)
+ 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;
+
+ /* And 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;
+
+ /* 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_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;
+ 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_VERSION_NUM(sbp) != XFS_SB_VERSION_5)
+ if (!xfs_sb_is_v5(sbp))
return 0;
/*
@@ -56,7 +153,7 @@ xfs_validate_sb_read(
"Superblock has unknown read-only compatible features (0x%x) enabled.",
(sbp->sb_features_ro_compat &
XFS_SB_FEAT_RO_COMPAT_UNKNOWN));
- if (!(mp->m_flags & XFS_MOUNT_RDONLY)) {
+ if (!xfs_is_readonly(mp)) {
xfs_warn(mp,
"Attempted to mount read-only compatible filesystem read-write.");
xfs_warn(mp,
@@ -95,7 +192,7 @@ xfs_validate_sb_write(
* secondary superblocks, so allow this usage to continue because
* we never read counters from such superblocks.
*/
- if (XFS_BUF_ADDR(bp) == XFS_SB_DADDR && !sbp->sb_inprogress &&
+ 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)) {
@@ -103,7 +200,7 @@ xfs_validate_sb_write(
return -EFSCORRUPTED;
}
- if (XFS_SB_VERSION_NUM(sbp) != XFS_SB_VERSION_5)
+ if (!xfs_sb_is_v5(sbp))
return 0;
/*
@@ -162,6 +259,7 @@ xfs_validate_sb_common(
struct xfs_dsb *dsb = bp->b_addr;
uint32_t agcount = 0;
uint32_t rem;
+ bool has_dalign;
if (!xfs_verify_magic(bp, dsb->sb_magicnum)) {
xfs_warn(mp, "bad magic number");
@@ -173,12 +271,41 @@ xfs_validate_sb_common(
return -EWRONGFS;
}
- if (xfs_sb_version_has_pquotino(sbp)) {
+ /*
+ * 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;
+ }
+ }
} else if (sbp->sb_qflags & (XFS_PQUOTA_ENFD | XFS_GQUOTA_ENFD |
XFS_PQUOTA_CHKD | XFS_GQUOTA_CHKD)) {
xfs_notice(mp,
@@ -186,24 +313,6 @@ xfs_validate_sb_common(
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 (xfs_sb_version_hassparseinodes(sbp)) {
- 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 (unlikely(
sbp->sb_logstart == 0 && mp->m_logdev_targp == mp->m_ddev_targp)) {
xfs_warn(mp,
@@ -303,7 +412,8 @@ xfs_validate_sb_common(
* Either (sb_unit and !hasdalign) or (!sb_unit and hasdalign)
* would imply the image is corrupted.
*/
- if (!!sbp->sb_unit ^ xfs_sb_version_hasdalign(sbp)) {
+ 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;
}
@@ -312,12 +422,6 @@ xfs_validate_sb_common(
XFS_FSB_TO_B(mp, sbp->sb_width), 0, false))
return -EFSCORRUPTED;
- if (xfs_sb_version_hascrc(&mp->m_sb) &&
- sbp->sb_blocksize < XFS_MIN_CRC_BLOCKSIZE) {
- xfs_notice(mp, "v5 SB sanity check failed");
- return -EFSCORRUPTED;
- }
-
/*
* Currently only very few inode sizes are supported.
*/
@@ -361,7 +465,7 @@ xfs_sb_quota_from_disk(struct xfs_sb *sbp)
* We need to do these manipilations only if we are working
* with an older version of on-disk superblock.
*/
- if (xfs_sb_version_has_pquotino(sbp))
+ if (xfs_sb_is_v5(sbp))
return;
if (sbp->sb_qflags & XFS_OQUOTA_ENFD)
@@ -454,7 +558,8 @@ __xfs_sb_from_disk(
* 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_version_hasmetauuid(to))
+ 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);
@@ -479,7 +584,12 @@ xfs_sb_quota_to_disk(
uint16_t qflags = from->sb_qflags;
to->sb_uquotino = cpu_to_be64(from->sb_uquotino);
- if (xfs_sb_version_has_pquotino(from)) {
+
+ /*
+ * 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);
@@ -487,9 +597,9 @@ xfs_sb_quota_to_disk(
}
/*
- * 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.
+ * 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);
@@ -589,19 +699,20 @@ xfs_sb_to_disk(
to->sb_features2 = cpu_to_be32(from->sb_features2);
to->sb_bad_features2 = cpu_to_be32(from->sb_bad_features2);
- if (xfs_sb_version_hascrc(from)) {
- 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 (xfs_sb_version_hasmetauuid(from))
- uuid_copy(&to->sb_meta_uuid, &from->sb_meta_uuid);
- }
+ 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);
}
/*
@@ -636,8 +747,8 @@ xfs_sb_read_verify(
if (!xfs_buf_verify_cksum(bp, XFS_SB_CRC_OFF)) {
/* Only fail bad secondaries on a known V5 filesystem */
- if (bp->b_bn == XFS_SB_DADDR ||
- xfs_sb_version_hascrc(&mp->m_sb)) {
+ if (xfs_buf_daddr(bp) == XFS_SB_DADDR ||
+ xfs_has_crc(mp)) {
error = -EFSBADCRC;
goto out_error;
}
@@ -704,7 +815,7 @@ xfs_sb_write_verify(
if (error)
goto out_error;
- if (!xfs_sb_version_hascrc(&mp->m_sb))
+ if (!xfs_sb_is_v5(&sb))
return;
if (bip)
@@ -801,7 +912,7 @@ xfs_log_sb(
* unclean shutdown, this will be corrected by log recovery rebuilding
* the counters from the AGF block counts.
*/
- if (xfs_sb_version_haslazysbcount(&mp->m_sb)) {
+ if (xfs_has_lazysbcount(mp)) {
mp->m_sb.sb_icount = percpu_counter_sum(&mp->m_icount);
mp->m_sb.sb_ifree = percpu_counter_sum(&mp->m_ifree);
mp->m_sb.sb_fdblocks = percpu_counter_sum(&mp->m_fdblocks);
@@ -950,10 +1061,12 @@ out:
void
xfs_fs_geometry(
- struct xfs_sb *sbp,
+ 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;
@@ -984,51 +1097,51 @@ xfs_fs_geometry(
geo->flags = XFS_FSOP_GEOM_FLAGS_NLINK |
XFS_FSOP_GEOM_FLAGS_DIRV2 |
XFS_FSOP_GEOM_FLAGS_EXTFLG;
- if (xfs_sb_version_hasattr(sbp))
+ if (xfs_has_attr(mp))
geo->flags |= XFS_FSOP_GEOM_FLAGS_ATTR;
- if (xfs_sb_version_hasquota(sbp))
+ if (xfs_has_quota(mp))
geo->flags |= XFS_FSOP_GEOM_FLAGS_QUOTA;
- if (xfs_sb_version_hasalign(sbp))
+ if (xfs_has_align(mp))
geo->flags |= XFS_FSOP_GEOM_FLAGS_IALIGN;
- if (xfs_sb_version_hasdalign(sbp))
+ if (xfs_has_dalign(mp))
geo->flags |= XFS_FSOP_GEOM_FLAGS_DALIGN;
- if (xfs_sb_version_hassector(sbp))
- geo->flags |= XFS_FSOP_GEOM_FLAGS_SECTOR;
- if (xfs_sb_version_hasasciici(sbp))
+ if (xfs_has_asciici(mp))
geo->flags |= XFS_FSOP_GEOM_FLAGS_DIRV2CI;
- if (xfs_sb_version_haslazysbcount(sbp))
+ if (xfs_has_lazysbcount(mp))
geo->flags |= XFS_FSOP_GEOM_FLAGS_LAZYSB;
- if (xfs_sb_version_hasattr2(sbp))
+ if (xfs_has_attr2(mp))
geo->flags |= XFS_FSOP_GEOM_FLAGS_ATTR2;
- if (xfs_sb_version_hasprojid32bit(sbp))
+ if (xfs_has_projid32(mp))
geo->flags |= XFS_FSOP_GEOM_FLAGS_PROJID32;
- if (xfs_sb_version_hascrc(sbp))
+ if (xfs_has_crc(mp))
geo->flags |= XFS_FSOP_GEOM_FLAGS_V5SB;
- if (xfs_sb_version_hasftype(sbp))
+ if (xfs_has_ftype(mp))
geo->flags |= XFS_FSOP_GEOM_FLAGS_FTYPE;
- if (xfs_sb_version_hasfinobt(sbp))
+ if (xfs_has_finobt(mp))
geo->flags |= XFS_FSOP_GEOM_FLAGS_FINOBT;
- if (xfs_sb_version_hassparseinodes(sbp))
+ if (xfs_has_sparseinodes(mp))
geo->flags |= XFS_FSOP_GEOM_FLAGS_SPINODES;
- if (xfs_sb_version_hasrmapbt(sbp))
+ if (xfs_has_rmapbt(mp))
geo->flags |= XFS_FSOP_GEOM_FLAGS_RMAPBT;
- if (xfs_sb_version_hasreflink(sbp))
+ if (xfs_has_reflink(mp))
geo->flags |= XFS_FSOP_GEOM_FLAGS_REFLINK;
- if (xfs_sb_version_hasbigtime(sbp))
+ if (xfs_has_bigtime(mp))
geo->flags |= XFS_FSOP_GEOM_FLAGS_BIGTIME;
- if (xfs_sb_version_hasinobtcounts(sbp))
+ if (xfs_has_inobtcounts(mp))
geo->flags |= XFS_FSOP_GEOM_FLAGS_INOBTCNT;
- if (xfs_sb_version_hassector(sbp))
+ if (xfs_has_sector(mp)) {
+ geo->flags |= XFS_FSOP_GEOM_FLAGS_SECTOR;
geo->logsectsize = sbp->sb_logsectsize;
- else
+ } else {
geo->logsectsize = BBSIZE;
+ }
geo->rtsectsize = sbp->sb_blocksize;
geo->dirblocksize = xfs_dir2_dirblock_bytes(sbp);
if (struct_version < 4)
return;
- if (xfs_sb_version_haslogv2(sbp))
+ if (xfs_has_logv2(mp))
geo->flags |= XFS_FSOP_GEOM_FLAGS_LOGV2;
geo->logsunit = sbp->sb_logsunit;