diff options
author | Dave Chinner <dchinner@redhat.com> | 2013-08-12 10:49:41 (GMT) |
---|---|---|
committer | Ben Myers <bpm@sgi.com> | 2013-08-12 21:44:11 (GMT) |
commit | ff55068c2010f39bcd899ca14b0a3d401d14da54 (patch) | |
tree | e207720e153c782682f833d0c00441fda88fadb2 /fs/xfs/xfs_mount.c | |
parent | 1fb7e48db6810093012873a652062648ace6b5bb (diff) | |
download | linux-ff55068c2010f39bcd899ca14b0a3d401d14da54.tar.xz |
xfs: introduce xfs_sb.c for sharing with libxfs
xfs_mount.c is shared with userspace, but the only functions that
are shared are to do with physical superblock manipulations. This
means that less than 25% of the xfs_mount.c code is actually shared
with userspace. Move all the superblock functions to xfs_sb.c and
share that instead with libxfs.
Note that this will leave all the in-core transaction related
superblock counter modifications in xfs_mount.c as none of that is
shared with userspace. With a few more small changes, xfs_mount.h
won't need to be shared with userspace anymore, either.
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Mark Tinguely <tinguely@sgi.com>
Signed-off-by: Ben Myers <bpm@sgi.com>
Diffstat (limited to 'fs/xfs/xfs_mount.c')
-rw-r--r-- | fs/xfs/xfs_mount.c | 784 |
1 files changed, 5 insertions, 779 deletions
diff --git a/fs/xfs/xfs_mount.c b/fs/xfs/xfs_mount.c index b07ca4b..3b6fe4f 100644 --- a/fs/xfs/xfs_mount.c +++ b/fs/xfs/xfs_mount.c @@ -61,69 +61,6 @@ STATIC void xfs_icsb_disable_counter(xfs_mount_t *, xfs_sb_field_t); #define xfs_icsb_balance_counter_locked(mp, a, b) do { } while (0) #endif -static const struct { - short offset; - short type; /* 0 = integer - * 1 = binary / string (no translation) - */ -} xfs_sb_info[] = { - { offsetof(xfs_sb_t, sb_magicnum), 0 }, - { offsetof(xfs_sb_t, sb_blocksize), 0 }, - { offsetof(xfs_sb_t, sb_dblocks), 0 }, - { offsetof(xfs_sb_t, sb_rblocks), 0 }, - { offsetof(xfs_sb_t, sb_rextents), 0 }, - { offsetof(xfs_sb_t, sb_uuid), 1 }, - { offsetof(xfs_sb_t, sb_logstart), 0 }, - { offsetof(xfs_sb_t, sb_rootino), 0 }, - { offsetof(xfs_sb_t, sb_rbmino), 0 }, - { offsetof(xfs_sb_t, sb_rsumino), 0 }, - { offsetof(xfs_sb_t, sb_rextsize), 0 }, - { offsetof(xfs_sb_t, sb_agblocks), 0 }, - { offsetof(xfs_sb_t, sb_agcount), 0 }, - { offsetof(xfs_sb_t, sb_rbmblocks), 0 }, - { offsetof(xfs_sb_t, sb_logblocks), 0 }, - { offsetof(xfs_sb_t, sb_versionnum), 0 }, - { offsetof(xfs_sb_t, sb_sectsize), 0 }, - { offsetof(xfs_sb_t, sb_inodesize), 0 }, - { offsetof(xfs_sb_t, sb_inopblock), 0 }, - { offsetof(xfs_sb_t, sb_fname[0]), 1 }, - { offsetof(xfs_sb_t, sb_blocklog), 0 }, - { offsetof(xfs_sb_t, sb_sectlog), 0 }, - { offsetof(xfs_sb_t, sb_inodelog), 0 }, - { offsetof(xfs_sb_t, sb_inopblog), 0 }, - { offsetof(xfs_sb_t, sb_agblklog), 0 }, - { offsetof(xfs_sb_t, sb_rextslog), 0 }, - { offsetof(xfs_sb_t, sb_inprogress), 0 }, - { offsetof(xfs_sb_t, sb_imax_pct), 0 }, - { offsetof(xfs_sb_t, sb_icount), 0 }, - { offsetof(xfs_sb_t, sb_ifree), 0 }, - { offsetof(xfs_sb_t, sb_fdblocks), 0 }, - { offsetof(xfs_sb_t, sb_frextents), 0 }, - { offsetof(xfs_sb_t, sb_uquotino), 0 }, - { offsetof(xfs_sb_t, sb_gquotino), 0 }, - { offsetof(xfs_sb_t, sb_qflags), 0 }, - { offsetof(xfs_sb_t, sb_flags), 0 }, - { offsetof(xfs_sb_t, sb_shared_vn), 0 }, - { offsetof(xfs_sb_t, sb_inoalignmt), 0 }, - { offsetof(xfs_sb_t, sb_unit), 0 }, - { offsetof(xfs_sb_t, sb_width), 0 }, - { offsetof(xfs_sb_t, sb_dirblklog), 0 }, - { offsetof(xfs_sb_t, sb_logsectlog), 0 }, - { offsetof(xfs_sb_t, sb_logsectsize),0 }, - { offsetof(xfs_sb_t, sb_logsunit), 0 }, - { offsetof(xfs_sb_t, sb_features2), 0 }, - { offsetof(xfs_sb_t, sb_bad_features2), 0 }, - { offsetof(xfs_sb_t, sb_features_compat), 0 }, - { offsetof(xfs_sb_t, sb_features_ro_compat), 0 }, - { offsetof(xfs_sb_t, sb_features_incompat), 0 }, - { offsetof(xfs_sb_t, sb_features_log_incompat), 0 }, - { offsetof(xfs_sb_t, sb_crc), 0 }, - { offsetof(xfs_sb_t, sb_pad), 0 }, - { offsetof(xfs_sb_t, sb_pquotino), 0 }, - { offsetof(xfs_sb_t, sb_lsn), 0 }, - { sizeof(xfs_sb_t), 0 } -}; - static DEFINE_MUTEX(xfs_uuid_table_mutex); static int xfs_uuid_table_size; static uuid_t *xfs_uuid_table; @@ -199,64 +136,6 @@ xfs_uuid_unmount( } -/* - * Reference counting access wrappers to the perag structures. - * Because we never free per-ag structures, the only thing we - * have to protect against changes is the tree structure itself. - */ -struct xfs_perag * -xfs_perag_get(struct xfs_mount *mp, xfs_agnumber_t agno) -{ - struct xfs_perag *pag; - int ref = 0; - - rcu_read_lock(); - pag = radix_tree_lookup(&mp->m_perag_tree, agno); - if (pag) { - ASSERT(atomic_read(&pag->pag_ref) >= 0); - ref = atomic_inc_return(&pag->pag_ref); - } - rcu_read_unlock(); - trace_xfs_perag_get(mp, agno, ref, _RET_IP_); - return pag; -} - -/* - * search from @first to find the next perag with the given tag set. - */ -struct xfs_perag * -xfs_perag_get_tag( - struct xfs_mount *mp, - xfs_agnumber_t first, - int tag) -{ - struct xfs_perag *pag; - int found; - int ref; - - rcu_read_lock(); - found = radix_tree_gang_lookup_tag(&mp->m_perag_tree, - (void **)&pag, first, 1, tag); - if (found <= 0) { - rcu_read_unlock(); - return NULL; - } - ref = atomic_inc_return(&pag->pag_ref); - rcu_read_unlock(); - trace_xfs_perag_get_tag(mp, pag->pag_agno, ref, _RET_IP_); - return pag; -} - -void -xfs_perag_put(struct xfs_perag *pag) -{ - int ref; - - ASSERT(atomic_read(&pag->pag_ref) > 0); - ref = atomic_dec_return(&pag->pag_ref); - trace_xfs_perag_put(pag->pag_mount, pag->pag_agno, ref, _RET_IP_); -} - STATIC void __xfs_free_perag( struct rcu_head *head) @@ -309,189 +188,6 @@ xfs_sb_validate_fsb_count( return 0; } -/* - * Check the validity of the SB found. - */ -STATIC int -xfs_mount_validate_sb( - xfs_mount_t *mp, - xfs_sb_t *sbp, - bool check_inprogress, - bool check_version) -{ - - /* - * If the log device and data device have the - * same device number, the log is internal. - * Consequently, the sb_logstart should be non-zero. If - * we have a zero sb_logstart in this case, we may be trying to mount - * a volume filesystem in a non-volume manner. - */ - if (sbp->sb_magicnum != XFS_SB_MAGIC) { - xfs_warn(mp, "bad magic number"); - return XFS_ERROR(EWRONGFS); - } - - - if (!xfs_sb_good_version(sbp)) { - xfs_warn(mp, "bad version"); - return XFS_ERROR(EWRONGFS); - } - - /* - * Version 5 superblock feature mask validation. Reject combinations the - * kernel cannot support up front before checking anything else. For - * write validation, we don't need to check feature masks. - */ - if (check_version && XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) { - xfs_alert(mp, -"Version 5 superblock detected. This kernel has EXPERIMENTAL support enabled!\n" -"Use of these features in this kernel is at your own risk!"); - - if (xfs_sb_has_compat_feature(sbp, - XFS_SB_FEAT_COMPAT_UNKNOWN)) { - xfs_warn(mp, -"Superblock has unknown compatible features (0x%x) enabled.\n" -"Using a more recent kernel is recommended.", - (sbp->sb_features_compat & - XFS_SB_FEAT_COMPAT_UNKNOWN)); - } - - 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 (!(mp->m_flags & XFS_MOUNT_RDONLY)) { - xfs_warn(mp, -"Attempted to mount read-only compatible filesystem read-write.\n" -"Filesystem can only be safely mounted read only."); - return XFS_ERROR(EINVAL); - } - } - if (xfs_sb_has_incompat_feature(sbp, - XFS_SB_FEAT_INCOMPAT_UNKNOWN)) { - xfs_warn(mp, -"Superblock has unknown incompatible features (0x%x) enabled.\n" -"Filesystem can not be safely mounted by this kernel.", - (sbp->sb_features_incompat & - XFS_SB_FEAT_INCOMPAT_UNKNOWN)); - return XFS_ERROR(EINVAL); - } - } - - if (xfs_sb_version_has_pquotino(sbp)) { - if (sbp->sb_qflags & (XFS_OQUOTA_ENFD | XFS_OQUOTA_CHKD)) { - xfs_notice(mp, - "Version 5 of Super block has XFS_OQUOTA bits.\n"); - return XFS_ERROR(EFSCORRUPTED); - } - } 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_[PQ]UOTA_{ENFD|CHKD} bits.\n"); - return XFS_ERROR(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 XFS_ERROR(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 XFS_ERROR(EINVAL); - } - - /* - * 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_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_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))) { - XFS_CORRUPTION_ERROR("SB sanity check failed", - XFS_ERRLEVEL_LOW, mp, sbp); - return XFS_ERROR(EFSCORRUPTED); - } - - /* - * Until this is fixed only page-sized or smaller data blocks work. - */ - if (unlikely(sbp->sb_blocksize > PAGE_SIZE)) { - xfs_warn(mp, - "File system with blocksize %d bytes. " - "Only pagesize (%ld) or less will currently work.", - sbp->sb_blocksize, PAGE_SIZE); - return XFS_ERROR(ENOSYS); - } - - /* - * 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 XFS_ERROR(ENOSYS); - } - - if (xfs_sb_validate_fsb_count(sbp, sbp->sb_dblocks) || - xfs_sb_validate_fsb_count(sbp, sbp->sb_rblocks)) { - xfs_warn(mp, - "file system too large to be mounted on this system."); - return XFS_ERROR(EFBIG); - } - - if (check_inprogress && sbp->sb_inprogress) { - xfs_warn(mp, "Offline file system operation in progress!"); - return XFS_ERROR(EFSCORRUPTED); - } - - /* - * Version 1 directory format has never worked on Linux. - */ - if (unlikely(!xfs_sb_version_hasdirv2(sbp))) { - xfs_warn(mp, "file system using version 1 directory format"); - return XFS_ERROR(ENOSYS); - } - - return 0; -} - int xfs_initialize_perag( xfs_mount_t *mp, @@ -576,342 +272,15 @@ out_unwind: return error; } -static void -xfs_sb_quota_from_disk(struct xfs_sb *sbp) -{ - /* - * 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_version_has_pquotino(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) { - /* - * 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. - */ - sbp->sb_pquotino = sbp->sb_gquotino; - sbp->sb_gquotino = NULLFSINO; - } -} - -void -xfs_sb_from_disk( - struct xfs_sb *to, - xfs_dsb_t *from) -{ - 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); - to->sb_pad = 0; - to->sb_pquotino = be64_to_cpu(from->sb_pquotino); - to->sb_lsn = be64_to_cpu(from->sb_lsn); -} - -static inline void -xfs_sb_quota_to_disk( - xfs_dsb_t *to, - xfs_sb_t *from, - __int64_t *fields) -{ - __uint16_t qflags = from->sb_qflags; - - /* - * 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(from)) - return; - - if (*fields & XFS_SB_QFLAGS) { - /* - * 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); - *fields &= ~XFS_SB_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 ((*fields & XFS_SB_GQUOTINO) && - (from->sb_qflags & XFS_GQUOTA_ACCT)) - to->sb_gquotino = cpu_to_be64(from->sb_gquotino); - else if ((*fields & XFS_SB_PQUOTINO) && - (from->sb_qflags & XFS_PQUOTA_ACCT)) - to->sb_gquotino = cpu_to_be64(from->sb_pquotino); - - *fields &= ~(XFS_SB_PQUOTINO | XFS_SB_GQUOTINO); -} - -/* - * Copy in core superblock to ondisk one. - * - * The fields argument is mask of superblock fields to copy. - */ -void -xfs_sb_to_disk( - xfs_dsb_t *to, - xfs_sb_t *from, - __int64_t fields) -{ - xfs_caddr_t to_ptr = (xfs_caddr_t)to; - xfs_caddr_t from_ptr = (xfs_caddr_t)from; - xfs_sb_field_t f; - int first; - int size; - - ASSERT(fields); - if (!fields) - return; - - xfs_sb_quota_to_disk(to, from, &fields); - while (fields) { - f = (xfs_sb_field_t)xfs_lowbit64((__uint64_t)fields); - first = xfs_sb_info[f].offset; - size = xfs_sb_info[f + 1].offset - first; - - ASSERT(xfs_sb_info[f].type == 0 || xfs_sb_info[f].type == 1); - - if (size == 1 || xfs_sb_info[f].type == 1) { - memcpy(to_ptr + first, from_ptr + first, size); - } else { - switch (size) { - case 2: - *(__be16 *)(to_ptr + first) = - cpu_to_be16(*(__u16 *)(from_ptr + first)); - break; - case 4: - *(__be32 *)(to_ptr + first) = - cpu_to_be32(*(__u32 *)(from_ptr + first)); - break; - case 8: - *(__be64 *)(to_ptr + first) = - cpu_to_be64(*(__u64 *)(from_ptr + first)); - break; - default: - ASSERT(0); - } - } - - fields &= ~(1LL << f); - } -} - -static int -xfs_sb_verify( - struct xfs_buf *bp, - bool check_version) -{ - struct xfs_mount *mp = bp->b_target->bt_mount; - struct xfs_sb sb; - - xfs_sb_from_disk(&sb, XFS_BUF_TO_SBP(bp)); - - /* - * Only check the in progress field for the primary superblock as - * mkfs.xfs doesn't clear it from secondary superblocks. - */ - return xfs_mount_validate_sb(mp, &sb, bp->b_bn == XFS_SB_DADDR, - check_version); -} - -/* - * 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. - */ -static void -xfs_sb_read_verify( - struct xfs_buf *bp) -{ - struct xfs_mount *mp = bp->b_target->bt_mount; - struct xfs_dsb *dsb = XFS_BUF_TO_SBP(bp); - 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_verify_cksum(bp->b_addr, be16_to_cpu(dsb->sb_sectsize), - offsetof(struct xfs_sb, sb_crc))) { - error = EFSCORRUPTED; - goto out_error; - } - } - error = xfs_sb_verify(bp, true); - -out_error: - if (error) { - XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, bp->b_addr); - 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, the 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 = XFS_BUF_TO_SBP(bp); - - - 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_mount *mp = bp->b_target->bt_mount; - struct xfs_buf_log_item *bip = bp->b_fspriv; - int error; - - error = xfs_sb_verify(bp, false); - if (error) { - XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, bp->b_addr); - xfs_buf_ioerror(bp, error); - return; - } - - if (!xfs_sb_version_hascrc(&mp->m_sb)) - return; - - if (bip) - XFS_BUF_TO_SBP(bp)->sb_lsn = cpu_to_be64(bip->bli_item.li_lsn); - - xfs_update_cksum(bp->b_addr, BBTOB(bp->b_length), - offsetof(struct xfs_sb, sb_crc)); -} - -const struct xfs_buf_ops xfs_sb_buf_ops = { - .verify_read = xfs_sb_read_verify, - .verify_write = xfs_sb_write_verify, -}; - -static const struct xfs_buf_ops xfs_sb_quiet_buf_ops = { - .verify_read = xfs_sb_quiet_read_verify, - .verify_write = xfs_sb_write_verify, -}; - /* * xfs_readsb * * Does the initial read of the superblock. */ int -xfs_readsb(xfs_mount_t *mp, int flags) +xfs_readsb( + struct xfs_mount *mp, + int flags) { unsigned int sector_size; struct xfs_buf *bp; @@ -950,8 +319,8 @@ reread: * Initialize the mount structure from the superblock. */ xfs_sb_from_disk(&mp->m_sb, XFS_BUF_TO_SBP(bp)); - xfs_sb_quota_from_disk(&mp->m_sb); + /* * We must be able to do sector-sized and sector-aligned IO. */ @@ -988,107 +357,6 @@ release_buf: return error; } - -/* - * xfs_mount_common - * - * Mount initialization code establishing various mount - * fields from the superblock associated with the given - * mount structure - */ -STATIC void -xfs_mount_common(xfs_mount_t *mp, xfs_sb_t *sbp) -{ - mp->m_agfrotor = mp->m_agirotor = 0; - spin_lock_init(&mp->m_agirotor_lock); - 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_agino_log = sbp->sb_inopblog + sbp->sb_agblklog; - mp->m_blockmask = sbp->sb_blocksize - 1; - mp->m_blockwsize = sbp->sb_blocksize >> XFS_WORDLOG; - mp->m_blockwmask = mp->m_blockwsize - 1; - - mp->m_alloc_mxr[0] = xfs_allocbt_maxrecs(mp, sbp->sb_blocksize, 1); - mp->m_alloc_mxr[1] = xfs_allocbt_maxrecs(mp, sbp->sb_blocksize, 0); - mp->m_alloc_mnr[0] = mp->m_alloc_mxr[0] / 2; - mp->m_alloc_mnr[1] = mp->m_alloc_mxr[1] / 2; - - mp->m_inobt_mxr[0] = xfs_inobt_maxrecs(mp, sbp->sb_blocksize, 1); - mp->m_inobt_mxr[1] = xfs_inobt_maxrecs(mp, sbp->sb_blocksize, 0); - mp->m_inobt_mnr[0] = mp->m_inobt_mxr[0] / 2; - mp->m_inobt_mnr[1] = mp->m_inobt_mxr[1] / 2; - - mp->m_bmap_dmxr[0] = xfs_bmbt_maxrecs(mp, sbp->sb_blocksize, 1); - mp->m_bmap_dmxr[1] = xfs_bmbt_maxrecs(mp, sbp->sb_blocksize, 0); - mp->m_bmap_dmnr[0] = mp->m_bmap_dmxr[0] / 2; - mp->m_bmap_dmnr[1] = mp->m_bmap_dmxr[1] / 2; - - mp->m_bsize = XFS_FSB_TO_BB(mp, 1); - mp->m_ialloc_inos = (int)MAX((__uint16_t)XFS_INODES_PER_CHUNK, - sbp->sb_inopblock); - mp->m_ialloc_blks = mp->m_ialloc_inos >> sbp->sb_inopblog; -} - -/* - * xfs_initialize_perag_data - * - * Read in each per-ag structure so we can count up the number of - * allocated inodes, free inodes and used filesystem blocks as this - * information is no longer persistent in the superblock. Once we have - * this information, write it into the in-core superblock structure. - */ -STATIC int -xfs_initialize_perag_data(xfs_mount_t *mp, xfs_agnumber_t agcount) -{ - xfs_agnumber_t index; - xfs_perag_t *pag; - xfs_sb_t *sbp = &mp->m_sb; - uint64_t ifree = 0; - uint64_t ialloc = 0; - uint64_t bfree = 0; - uint64_t bfreelst = 0; - uint64_t btree = 0; - int error; - - for (index = 0; index < agcount; index++) { - /* - * read the agf, then the agi. This gets us - * all the information we need and populates the - * per-ag structures for us. - */ - error = xfs_alloc_pagf_init(mp, NULL, index, 0); - if (error) - return error; - - error = xfs_ialloc_pagi_init(mp, NULL, index); - if (error) - return error; - pag = xfs_perag_get(mp, index); - ifree += pag->pagi_freecount; - ialloc += pag->pagi_count; - bfree += pag->pagf_freeblks; - bfreelst += pag->pagf_flcount; - btree += pag->pagf_btreeblks; - xfs_perag_put(pag); - } - /* - * Overwrite incore superblock counters with just-read data - */ - spin_lock(&mp->m_sb_lock); - sbp->sb_ifree = ifree; - sbp->sb_icount = ialloc; - sbp->sb_fdblocks = bfree + bfreelst + btree; - spin_unlock(&mp->m_sb_lock); - - /* Fixup the per-cpu counters as well. */ - xfs_icsb_reinit_counters(mp); - - return 0; -} - /* * Update alignment values based on mount options and sb values */ @@ -1381,7 +649,7 @@ xfs_mountfs( uint quotaflags = 0; int error = 0; - xfs_mount_common(mp, sbp); + xfs_sb_mount_common(mp, sbp); /* * Check for a mismatched features2 values. Older kernels @@ -1818,48 +1086,6 @@ xfs_log_sbcount(xfs_mount_t *mp) } /* - * xfs_mod_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_mod_sb(xfs_trans_t *tp, __int64_t fields) -{ - xfs_buf_t *bp; - int first; - int last; - xfs_mount_t *mp; - xfs_sb_field_t f; - - ASSERT(fields); - if (!fields) - return; - mp = tp->t_mountp; - bp = xfs_trans_getsb(tp, mp, 0); - first = sizeof(xfs_sb_t); - last = 0; - - /* translate/copy */ - - xfs_sb_to_disk(XFS_BUF_TO_SBP(bp), &mp->m_sb, fields); - - /* find modified range */ - f = (xfs_sb_field_t)xfs_highbit64((__uint64_t)fields); - ASSERT((1LL << f) & XFS_SB_MOD_BITS); - last = xfs_sb_info[f + 1].offset - 1; - - f = (xfs_sb_field_t)xfs_lowbit64((__uint64_t)fields); - ASSERT((1LL << f) & XFS_SB_MOD_BITS); - first = xfs_sb_info[f].offset; - - xfs_trans_buf_set_type(tp, bp, XFS_BLFT_SB_BUF); - xfs_trans_log_buf(tp, bp, first, last); -} - - -/* * xfs_mod_incore_sb_unlocked() is a utility routine common used to apply * a delta to a specified field in the in-core superblock. Simply * switch on the field indicated and apply the delta to that field. |