![Carlos Maiolino](/assets/img/avatar_default.png)
By splitting the b_fspriv field into two different fields (b_log_item and b_li_list). It's possible to get rid of an old ABI workaround, by using the new b_log_item field to store xfs_buf_log_item separated from the log items attached to the buffer, which will be linked in the new b_li_list field. This way, there is no more need to reorder the log items list to place the buf_log_item at the beginning of the list, simplifying a bit the logic to handle buffer IO. This also opens the possibility to change buffer's log items list into a proper list_head. b_log_item field is still defined as a void *, because it is still used by the log buffers to store xlog_in_core structures, and there is no need to add an extra field on xfs_buf just for xlog_in_core. Signed-off-by: Carlos Maiolino <cmaiolino@redhat.com> Reviewed-by: Bill O'Donnell <billodo@redhat.com> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> [darrick: minor style changes] Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
978 lines
30 KiB
C
978 lines
30 KiB
C
/*
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* Copyright (c) 2000-2005 Silicon Graphics, Inc.
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* All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it would be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "xfs.h"
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#include "xfs_fs.h"
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#include "xfs_shared.h"
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#include "xfs_format.h"
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#include "xfs_log_format.h"
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#include "xfs_trans_resv.h"
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#include "xfs_bit.h"
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#include "xfs_sb.h"
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#include "xfs_mount.h"
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#include "xfs_defer.h"
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#include "xfs_inode.h"
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#include "xfs_ialloc.h"
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#include "xfs_alloc.h"
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#include "xfs_error.h"
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#include "xfs_trace.h"
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#include "xfs_cksum.h"
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#include "xfs_trans.h"
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#include "xfs_buf_item.h"
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#include "xfs_bmap_btree.h"
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#include "xfs_alloc_btree.h"
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#include "xfs_ialloc_btree.h"
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#include "xfs_log.h"
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#include "xfs_rmap_btree.h"
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#include "xfs_bmap.h"
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#include "xfs_refcount_btree.h"
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#include "xfs_da_format.h"
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#include "xfs_da_btree.h"
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/*
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* Physical superblock buffer manipulations. Shared with libxfs in userspace.
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*/
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/*
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* Reference counting access wrappers to the perag structures.
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* Because we never free per-ag structures, the only thing we
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* have to protect against changes is the tree structure itself.
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*/
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struct xfs_perag *
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xfs_perag_get(
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struct xfs_mount *mp,
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xfs_agnumber_t agno)
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{
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struct xfs_perag *pag;
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int ref = 0;
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rcu_read_lock();
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pag = radix_tree_lookup(&mp->m_perag_tree, agno);
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if (pag) {
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ASSERT(atomic_read(&pag->pag_ref) >= 0);
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ref = atomic_inc_return(&pag->pag_ref);
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}
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rcu_read_unlock();
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trace_xfs_perag_get(mp, agno, ref, _RET_IP_);
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return pag;
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}
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/*
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* search from @first to find the next perag with the given tag set.
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*/
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struct xfs_perag *
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xfs_perag_get_tag(
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struct xfs_mount *mp,
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xfs_agnumber_t first,
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int tag)
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{
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struct xfs_perag *pag;
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int found;
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int ref;
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rcu_read_lock();
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found = radix_tree_gang_lookup_tag(&mp->m_perag_tree,
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(void **)&pag, first, 1, tag);
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if (found <= 0) {
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rcu_read_unlock();
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return NULL;
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}
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ref = atomic_inc_return(&pag->pag_ref);
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rcu_read_unlock();
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trace_xfs_perag_get_tag(mp, pag->pag_agno, ref, _RET_IP_);
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return pag;
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}
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void
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xfs_perag_put(
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struct xfs_perag *pag)
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{
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int ref;
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ASSERT(atomic_read(&pag->pag_ref) > 0);
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ref = atomic_dec_return(&pag->pag_ref);
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trace_xfs_perag_put(pag->pag_mount, pag->pag_agno, ref, _RET_IP_);
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}
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/*
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* Check the validity of the SB found.
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*/
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STATIC int
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xfs_mount_validate_sb(
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xfs_mount_t *mp,
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xfs_sb_t *sbp,
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bool check_inprogress,
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bool check_version)
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{
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u32 agcount = 0;
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u32 rem;
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if (sbp->sb_magicnum != XFS_SB_MAGIC) {
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xfs_warn(mp, "bad magic number");
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return -EWRONGFS;
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}
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if (!xfs_sb_good_version(sbp)) {
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xfs_warn(mp, "bad version");
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return -EWRONGFS;
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}
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/*
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* Version 5 superblock feature mask validation. Reject combinations the
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* kernel cannot support up front before checking anything else. For
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* write validation, we don't need to check feature masks.
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*/
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if (check_version && XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) {
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if (xfs_sb_has_compat_feature(sbp,
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XFS_SB_FEAT_COMPAT_UNKNOWN)) {
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xfs_warn(mp,
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"Superblock has unknown compatible features (0x%x) enabled.",
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(sbp->sb_features_compat &
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XFS_SB_FEAT_COMPAT_UNKNOWN));
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xfs_warn(mp,
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"Using a more recent kernel is recommended.");
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}
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if (xfs_sb_has_ro_compat_feature(sbp,
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XFS_SB_FEAT_RO_COMPAT_UNKNOWN)) {
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xfs_alert(mp,
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"Superblock has unknown read-only compatible features (0x%x) enabled.",
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(sbp->sb_features_ro_compat &
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XFS_SB_FEAT_RO_COMPAT_UNKNOWN));
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if (!(mp->m_flags & XFS_MOUNT_RDONLY)) {
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xfs_warn(mp,
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"Attempted to mount read-only compatible filesystem read-write.");
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xfs_warn(mp,
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"Filesystem can only be safely mounted read only.");
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return -EINVAL;
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}
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}
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if (xfs_sb_has_incompat_feature(sbp,
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XFS_SB_FEAT_INCOMPAT_UNKNOWN)) {
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xfs_warn(mp,
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"Superblock has unknown incompatible features (0x%x) enabled.",
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(sbp->sb_features_incompat &
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XFS_SB_FEAT_INCOMPAT_UNKNOWN));
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xfs_warn(mp,
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"Filesystem can not be safely mounted by this kernel.");
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return -EINVAL;
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}
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} else if (xfs_sb_version_hascrc(sbp)) {
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/*
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* We can't read verify the sb LSN because the read verifier is
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* called before the log is allocated and processed. We know the
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* log is set up before write verifier (!check_version) calls,
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* so just check it here.
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*/
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if (!xfs_log_check_lsn(mp, sbp->sb_lsn))
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return -EFSCORRUPTED;
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}
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if (xfs_sb_version_has_pquotino(sbp)) {
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if (sbp->sb_qflags & (XFS_OQUOTA_ENFD | XFS_OQUOTA_CHKD)) {
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xfs_notice(mp,
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"Version 5 of Super block has XFS_OQUOTA bits.");
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return -EFSCORRUPTED;
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}
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} else if (sbp->sb_qflags & (XFS_PQUOTA_ENFD | XFS_GQUOTA_ENFD |
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XFS_PQUOTA_CHKD | XFS_GQUOTA_CHKD)) {
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xfs_notice(mp,
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"Superblock earlier than Version 5 has XFS_[PQ]UOTA_{ENFD|CHKD} bits.");
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return -EFSCORRUPTED;
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}
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/*
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* Full inode chunks must be aligned to inode chunk size when
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* sparse inodes are enabled to support the sparse chunk
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* allocation algorithm and prevent overlapping inode records.
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*/
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if (xfs_sb_version_hassparseinodes(sbp)) {
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uint32_t align;
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align = XFS_INODES_PER_CHUNK * sbp->sb_inodesize
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>> sbp->sb_blocklog;
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if (sbp->sb_inoalignmt != align) {
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xfs_warn(mp,
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"Inode block alignment (%u) must match chunk size (%u) for sparse inodes.",
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sbp->sb_inoalignmt, align);
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return -EINVAL;
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}
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}
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if (unlikely(
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sbp->sb_logstart == 0 && mp->m_logdev_targp == mp->m_ddev_targp)) {
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xfs_warn(mp,
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"filesystem is marked as having an external log; "
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"specify logdev on the mount command line.");
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return -EINVAL;
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}
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if (unlikely(
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sbp->sb_logstart != 0 && mp->m_logdev_targp != mp->m_ddev_targp)) {
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xfs_warn(mp,
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"filesystem is marked as having an internal log; "
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"do not specify logdev on the mount command line.");
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return -EINVAL;
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}
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/* Compute agcount for this number of dblocks and agblocks */
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if (sbp->sb_agblocks) {
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agcount = div_u64_rem(sbp->sb_dblocks, sbp->sb_agblocks, &rem);
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if (rem)
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agcount++;
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}
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/*
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* More sanity checking. Most of these were stolen directly from
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* xfs_repair.
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*/
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if (unlikely(
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sbp->sb_agcount <= 0 ||
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sbp->sb_sectsize < XFS_MIN_SECTORSIZE ||
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sbp->sb_sectsize > XFS_MAX_SECTORSIZE ||
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sbp->sb_sectlog < XFS_MIN_SECTORSIZE_LOG ||
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sbp->sb_sectlog > XFS_MAX_SECTORSIZE_LOG ||
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sbp->sb_sectsize != (1 << sbp->sb_sectlog) ||
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sbp->sb_blocksize < XFS_MIN_BLOCKSIZE ||
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sbp->sb_blocksize > XFS_MAX_BLOCKSIZE ||
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sbp->sb_blocklog < XFS_MIN_BLOCKSIZE_LOG ||
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sbp->sb_blocklog > XFS_MAX_BLOCKSIZE_LOG ||
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sbp->sb_blocksize != (1 << sbp->sb_blocklog) ||
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sbp->sb_dirblklog + sbp->sb_blocklog > XFS_MAX_BLOCKSIZE_LOG ||
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sbp->sb_inodesize < XFS_DINODE_MIN_SIZE ||
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sbp->sb_inodesize > XFS_DINODE_MAX_SIZE ||
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sbp->sb_inodelog < XFS_DINODE_MIN_LOG ||
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sbp->sb_inodelog > XFS_DINODE_MAX_LOG ||
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sbp->sb_inodesize != (1 << sbp->sb_inodelog) ||
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sbp->sb_logsunit > XLOG_MAX_RECORD_BSIZE ||
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sbp->sb_inopblock != howmany(sbp->sb_blocksize,sbp->sb_inodesize) ||
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XFS_FSB_TO_B(mp, sbp->sb_agblocks) < XFS_MIN_AG_BYTES ||
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XFS_FSB_TO_B(mp, sbp->sb_agblocks) > XFS_MAX_AG_BYTES ||
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sbp->sb_agblklog != xfs_highbit32(sbp->sb_agblocks - 1) + 1 ||
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agcount == 0 || agcount != sbp->sb_agcount ||
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(sbp->sb_blocklog - sbp->sb_inodelog != sbp->sb_inopblog) ||
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(sbp->sb_rextsize * sbp->sb_blocksize > XFS_MAX_RTEXTSIZE) ||
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(sbp->sb_rextsize * sbp->sb_blocksize < XFS_MIN_RTEXTSIZE) ||
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(sbp->sb_imax_pct > 100 /* zero sb_imax_pct is valid */) ||
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sbp->sb_dblocks == 0 ||
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sbp->sb_dblocks > XFS_MAX_DBLOCKS(sbp) ||
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sbp->sb_dblocks < XFS_MIN_DBLOCKS(sbp) ||
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sbp->sb_shared_vn != 0)) {
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xfs_notice(mp, "SB sanity check failed");
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return -EFSCORRUPTED;
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}
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if (xfs_sb_version_hascrc(&mp->m_sb) &&
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sbp->sb_blocksize < XFS_MIN_CRC_BLOCKSIZE) {
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xfs_notice(mp, "v5 SB sanity check failed");
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return -EFSCORRUPTED;
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}
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/*
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* Until this is fixed only page-sized or smaller data blocks work.
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*/
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if (unlikely(sbp->sb_blocksize > PAGE_SIZE)) {
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xfs_warn(mp,
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"File system with blocksize %d bytes. "
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"Only pagesize (%ld) or less will currently work.",
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sbp->sb_blocksize, PAGE_SIZE);
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return -ENOSYS;
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}
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/*
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* Currently only very few inode sizes are supported.
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*/
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switch (sbp->sb_inodesize) {
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case 256:
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case 512:
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case 1024:
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case 2048:
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break;
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default:
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xfs_warn(mp, "inode size of %d bytes not supported",
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sbp->sb_inodesize);
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return -ENOSYS;
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}
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if (xfs_sb_validate_fsb_count(sbp, sbp->sb_dblocks) ||
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xfs_sb_validate_fsb_count(sbp, sbp->sb_rblocks)) {
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xfs_warn(mp,
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"file system too large to be mounted on this system.");
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return -EFBIG;
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}
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if (check_inprogress && sbp->sb_inprogress) {
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xfs_warn(mp, "Offline file system operation in progress!");
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return -EFSCORRUPTED;
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}
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return 0;
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}
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void
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xfs_sb_quota_from_disk(struct xfs_sb *sbp)
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{
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/*
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* older mkfs doesn't initialize quota inodes to NULLFSINO. This
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* leads to in-core values having two different values for a quota
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* inode to be invalid: 0 and NULLFSINO. Change it to a single value
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* NULLFSINO.
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*
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* Note that this change affect only the in-core values. These
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* values are not written back to disk unless any quota information
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* is written to the disk. Even in that case, sb_pquotino field is
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* not written to disk unless the superblock supports pquotino.
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*/
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if (sbp->sb_uquotino == 0)
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sbp->sb_uquotino = NULLFSINO;
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if (sbp->sb_gquotino == 0)
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sbp->sb_gquotino = NULLFSINO;
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if (sbp->sb_pquotino == 0)
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sbp->sb_pquotino = NULLFSINO;
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/*
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* We need to do these manipilations only if we are working
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* with an older version of on-disk superblock.
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*/
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if (xfs_sb_version_has_pquotino(sbp))
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return;
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if (sbp->sb_qflags & XFS_OQUOTA_ENFD)
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sbp->sb_qflags |= (sbp->sb_qflags & XFS_PQUOTA_ACCT) ?
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XFS_PQUOTA_ENFD : XFS_GQUOTA_ENFD;
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if (sbp->sb_qflags & XFS_OQUOTA_CHKD)
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sbp->sb_qflags |= (sbp->sb_qflags & XFS_PQUOTA_ACCT) ?
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XFS_PQUOTA_CHKD : XFS_GQUOTA_CHKD;
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sbp->sb_qflags &= ~(XFS_OQUOTA_ENFD | XFS_OQUOTA_CHKD);
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if (sbp->sb_qflags & XFS_PQUOTA_ACCT &&
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sbp->sb_gquotino != NULLFSINO) {
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/*
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* In older version of superblock, on-disk superblock only
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* has sb_gquotino, and in-core superblock has both sb_gquotino
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* and sb_pquotino. But, only one of them is supported at any
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* point of time. So, if PQUOTA is set in disk superblock,
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* copy over sb_gquotino to sb_pquotino. The NULLFSINO test
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* above is to make sure we don't do this twice and wipe them
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* both out!
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*/
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sbp->sb_pquotino = sbp->sb_gquotino;
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sbp->sb_gquotino = NULLFSINO;
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}
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}
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static void
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__xfs_sb_from_disk(
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struct xfs_sb *to,
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xfs_dsb_t *from,
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bool convert_xquota)
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{
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to->sb_magicnum = be32_to_cpu(from->sb_magicnum);
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to->sb_blocksize = be32_to_cpu(from->sb_blocksize);
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to->sb_dblocks = be64_to_cpu(from->sb_dblocks);
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to->sb_rblocks = be64_to_cpu(from->sb_rblocks);
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to->sb_rextents = be64_to_cpu(from->sb_rextents);
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memcpy(&to->sb_uuid, &from->sb_uuid, sizeof(to->sb_uuid));
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to->sb_logstart = be64_to_cpu(from->sb_logstart);
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to->sb_rootino = be64_to_cpu(from->sb_rootino);
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to->sb_rbmino = be64_to_cpu(from->sb_rbmino);
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to->sb_rsumino = be64_to_cpu(from->sb_rsumino);
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to->sb_rextsize = be32_to_cpu(from->sb_rextsize);
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to->sb_agblocks = be32_to_cpu(from->sb_agblocks);
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to->sb_agcount = be32_to_cpu(from->sb_agcount);
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to->sb_rbmblocks = be32_to_cpu(from->sb_rbmblocks);
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to->sb_logblocks = be32_to_cpu(from->sb_logblocks);
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to->sb_versionnum = be16_to_cpu(from->sb_versionnum);
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to->sb_sectsize = be16_to_cpu(from->sb_sectsize);
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to->sb_inodesize = be16_to_cpu(from->sb_inodesize);
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to->sb_inopblock = be16_to_cpu(from->sb_inopblock);
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memcpy(&to->sb_fname, &from->sb_fname, sizeof(to->sb_fname));
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to->sb_blocklog = from->sb_blocklog;
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to->sb_sectlog = from->sb_sectlog;
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to->sb_inodelog = from->sb_inodelog;
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to->sb_inopblog = from->sb_inopblog;
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to->sb_agblklog = from->sb_agblklog;
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to->sb_rextslog = from->sb_rextslog;
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to->sb_inprogress = from->sb_inprogress;
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to->sb_imax_pct = from->sb_imax_pct;
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to->sb_icount = be64_to_cpu(from->sb_icount);
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to->sb_ifree = be64_to_cpu(from->sb_ifree);
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to->sb_fdblocks = be64_to_cpu(from->sb_fdblocks);
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to->sb_frextents = be64_to_cpu(from->sb_frextents);
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to->sb_uquotino = be64_to_cpu(from->sb_uquotino);
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to->sb_gquotino = be64_to_cpu(from->sb_gquotino);
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to->sb_qflags = be16_to_cpu(from->sb_qflags);
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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_version_hasmetauuid(to))
|
|
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);
|
|
}
|
|
|
|
void
|
|
xfs_sb_from_disk(
|
|
struct xfs_sb *to,
|
|
xfs_dsb_t *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;
|
|
|
|
to->sb_uquotino = cpu_to_be64(from->sb_uquotino);
|
|
if (xfs_sb_version_has_pquotino(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;
|
|
}
|
|
|
|
/*
|
|
* 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
|
|
* it 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_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);
|
|
}
|
|
}
|
|
|
|
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;
|
|
|
|
/*
|
|
* Use call variant which doesn't convert quota flags from disk
|
|
* format, because xfs_mount_validate_sb checks the on-disk flags.
|
|
*/
|
|
__xfs_sb_from_disk(&sb, XFS_BUF_TO_SBP(bp), false);
|
|
|
|
/*
|
|
* 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_maps[0].bm_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.
|
|
*
|
|
* 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_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_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)) {
|
|
error = -EFSBADCRC;
|
|
goto out_error;
|
|
}
|
|
}
|
|
}
|
|
error = xfs_sb_verify(bp, true);
|
|
|
|
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 = 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_log_item;
|
|
int error;
|
|
|
|
error = xfs_sb_verify(bp, false);
|
|
if (error) {
|
|
xfs_verifier_error(bp, error, __this_address);
|
|
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_buf_update_cksum(bp, XFS_SB_CRC_OFF);
|
|
}
|
|
|
|
const struct xfs_buf_ops xfs_sb_buf_ops = {
|
|
.name = "xfs_sb",
|
|
.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",
|
|
.verify_read = xfs_sb_quiet_read_verify,
|
|
.verify_write = xfs_sb_write_verify,
|
|
};
|
|
|
|
/*
|
|
* xfs_mount_common
|
|
*
|
|
* Mount initialization code establishing various mount
|
|
* fields from the superblock associated with the given
|
|
* mount structure
|
|
*/
|
|
void
|
|
xfs_sb_mount_common(
|
|
struct xfs_mount *mp,
|
|
struct xfs_sb *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_rmap_mxr[0] = xfs_rmapbt_maxrecs(mp, sbp->sb_blocksize, 1);
|
|
mp->m_rmap_mxr[1] = xfs_rmapbt_maxrecs(mp, sbp->sb_blocksize, 0);
|
|
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_ialloc_inos = (int)MAX((uint16_t)XFS_INODES_PER_CHUNK,
|
|
sbp->sb_inopblock);
|
|
mp->m_ialloc_blks = mp->m_ialloc_inos >> sbp->sb_inopblog;
|
|
|
|
if (sbp->sb_spino_align)
|
|
mp->m_ialloc_min_blks = sbp->sb_spino_align;
|
|
else
|
|
mp->m_ialloc_min_blks = mp->m_ialloc_blks;
|
|
mp->m_alloc_set_aside = xfs_alloc_set_aside(mp);
|
|
mp->m_ag_max_usable = xfs_alloc_ag_max_usable(mp);
|
|
}
|
|
|
|
/*
|
|
* 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.
|
|
*/
|
|
int
|
|
xfs_initialize_perag_data(
|
|
struct xfs_mount *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);
|
|
|
|
xfs_reinit_percpu_counters(mp);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* 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, mp, 0);
|
|
|
|
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);
|
|
|
|
xfs_sb_to_disk(XFS_BUF_TO_SBP(bp), &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));
|
|
}
|
|
|
|
/*
|
|
* 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);
|
|
}
|
|
|
|
int
|
|
xfs_fs_geometry(
|
|
struct xfs_sb *sbp,
|
|
struct xfs_fsop_geom *geo,
|
|
int struct_version)
|
|
{
|
|
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 0;
|
|
|
|
geo->sunit = sbp->sb_unit;
|
|
geo->swidth = sbp->sb_width;
|
|
|
|
if (struct_version < 3)
|
|
return 0;
|
|
|
|
geo->version = XFS_FSOP_GEOM_VERSION;
|
|
geo->flags = XFS_FSOP_GEOM_FLAGS_NLINK |
|
|
XFS_FSOP_GEOM_FLAGS_DIRV2;
|
|
if (xfs_sb_version_hasattr(sbp))
|
|
geo->flags |= XFS_FSOP_GEOM_FLAGS_ATTR;
|
|
if (xfs_sb_version_hasquota(sbp))
|
|
geo->flags |= XFS_FSOP_GEOM_FLAGS_QUOTA;
|
|
if (xfs_sb_version_hasalign(sbp))
|
|
geo->flags |= XFS_FSOP_GEOM_FLAGS_IALIGN;
|
|
if (xfs_sb_version_hasdalign(sbp))
|
|
geo->flags |= XFS_FSOP_GEOM_FLAGS_DALIGN;
|
|
if (xfs_sb_version_hasextflgbit(sbp))
|
|
geo->flags |= XFS_FSOP_GEOM_FLAGS_EXTFLG;
|
|
if (xfs_sb_version_hassector(sbp))
|
|
geo->flags |= XFS_FSOP_GEOM_FLAGS_SECTOR;
|
|
if (xfs_sb_version_hasasciici(sbp))
|
|
geo->flags |= XFS_FSOP_GEOM_FLAGS_DIRV2CI;
|
|
if (xfs_sb_version_haslazysbcount(sbp))
|
|
geo->flags |= XFS_FSOP_GEOM_FLAGS_LAZYSB;
|
|
if (xfs_sb_version_hasattr2(sbp))
|
|
geo->flags |= XFS_FSOP_GEOM_FLAGS_ATTR2;
|
|
if (xfs_sb_version_hasprojid32bit(sbp))
|
|
geo->flags |= XFS_FSOP_GEOM_FLAGS_PROJID32;
|
|
if (xfs_sb_version_hascrc(sbp))
|
|
geo->flags |= XFS_FSOP_GEOM_FLAGS_V5SB;
|
|
if (xfs_sb_version_hasftype(sbp))
|
|
geo->flags |= XFS_FSOP_GEOM_FLAGS_FTYPE;
|
|
if (xfs_sb_version_hasfinobt(sbp))
|
|
geo->flags |= XFS_FSOP_GEOM_FLAGS_FINOBT;
|
|
if (xfs_sb_version_hassparseinodes(sbp))
|
|
geo->flags |= XFS_FSOP_GEOM_FLAGS_SPINODES;
|
|
if (xfs_sb_version_hasrmapbt(sbp))
|
|
geo->flags |= XFS_FSOP_GEOM_FLAGS_RMAPBT;
|
|
if (xfs_sb_version_hasreflink(sbp))
|
|
geo->flags |= XFS_FSOP_GEOM_FLAGS_REFLINK;
|
|
if (xfs_sb_version_hassector(sbp))
|
|
geo->logsectsize = sbp->sb_logsectsize;
|
|
else
|
|
geo->logsectsize = BBSIZE;
|
|
geo->rtsectsize = sbp->sb_blocksize;
|
|
geo->dirblocksize = xfs_dir2_dirblock_bytes(sbp);
|
|
|
|
if (struct_version < 4)
|
|
return 0;
|
|
|
|
if (xfs_sb_version_haslogv2(sbp))
|
|
geo->flags |= XFS_FSOP_GEOM_FLAGS_LOGV2;
|
|
|
|
geo->logsunit = sbp->sb_logsunit;
|
|
|
|
return 0;
|
|
}
|