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-rw-r--r--fs/xfs/xfs_log_recover.c71
1 files changed, 41 insertions, 30 deletions
diff --git a/fs/xfs/xfs_log_recover.c b/fs/xfs/xfs_log_recover.c
index 2b2383f1895e..b181b5f57a19 100644
--- a/fs/xfs/xfs_log_recover.c
+++ b/fs/xfs/xfs_log_recover.c
@@ -1,19 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2000-2006 Silicon Graphics, Inc.
* All Rights Reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it would be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write the Free Software Foundation,
- * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "xfs.h"
#include "xfs_fs.h"
@@ -1248,6 +1236,25 @@ xlog_verify_head(
}
/*
+ * We need to make sure we handle log wrapping properly, so we can't use the
+ * calculated logbno directly. Make sure it wraps to the correct bno inside the
+ * log.
+ *
+ * The log is limited to 32 bit sizes, so we use the appropriate modulus
+ * operation here and cast it back to a 64 bit daddr on return.
+ */
+static inline xfs_daddr_t
+xlog_wrap_logbno(
+ struct xlog *log,
+ xfs_daddr_t bno)
+{
+ int mod;
+
+ div_s64_rem(bno, log->l_logBBsize, &mod);
+ return mod;
+}
+
+/*
* Check whether the head of the log points to an unmount record. In other
* words, determine whether the log is clean. If so, update the in-core state
* appropriately.
@@ -1295,12 +1302,13 @@ xlog_check_unmount_rec(
} else {
hblks = 1;
}
- after_umount_blk = rhead_blk + hblks + BTOBB(be32_to_cpu(rhead->h_len));
- after_umount_blk = do_mod(after_umount_blk, log->l_logBBsize);
+
+ after_umount_blk = xlog_wrap_logbno(log,
+ rhead_blk + hblks + BTOBB(be32_to_cpu(rhead->h_len)));
+
if (*head_blk == after_umount_blk &&
be32_to_cpu(rhead->h_num_logops) == 1) {
- umount_data_blk = rhead_blk + hblks;
- umount_data_blk = do_mod(umount_data_blk, log->l_logBBsize);
+ umount_data_blk = xlog_wrap_logbno(log, rhead_blk + hblks);
error = xlog_bread(log, umount_data_blk, 1, bp, &offset);
if (error)
return error;
@@ -1816,7 +1824,7 @@ xlog_clear_stale_blocks(
* we don't waste all day writing from the head to the tail
* for no reason.
*/
- max_distance = MIN(max_distance, tail_distance);
+ max_distance = min(max_distance, tail_distance);
if ((head_block + max_distance) <= log->l_logBBsize) {
/*
@@ -2702,7 +2710,7 @@ xlog_recover_do_reg_buffer(
goto next;
}
fa = xfs_dquot_verify(mp, item->ri_buf[i].i_addr,
- -1, 0, 0);
+ -1, 0);
if (fa) {
xfs_alert(mp,
"dquot corrupt at %pS trying to replay into block 0x%llx",
@@ -2884,14 +2892,14 @@ xlog_recover_buffer_pass2(
* buffers in the log can be a different size if the log was generated
* by an older kernel using unclustered inode buffers or a newer kernel
* running with a different inode cluster size. Regardless, if the
- * the inode buffer size isn't MAX(blocksize, mp->m_inode_cluster_size)
+ * the inode buffer size isn't max(blocksize, mp->m_inode_cluster_size)
* for *our* value of mp->m_inode_cluster_size, then we need to keep
* the buffer out of the buffer cache so that the buffer won't
* overlap with future reads of those inodes.
*/
if (XFS_DINODE_MAGIC ==
be16_to_cpu(*((__be16 *)xfs_buf_offset(bp, 0))) &&
- (BBTOB(bp->b_io_length) != MAX(log->l_mp->m_sb.sb_blocksize,
+ (BBTOB(bp->b_io_length) != max(log->l_mp->m_sb.sb_blocksize,
(uint32_t)log->l_mp->m_inode_cluster_size))) {
xfs_buf_stale(bp);
error = xfs_bwrite(bp);
@@ -3115,7 +3123,8 @@ xlog_recover_inode_pass2(
if ((ldip->di_format != XFS_DINODE_FMT_EXTENTS) &&
(ldip->di_format != XFS_DINODE_FMT_BTREE)) {
XFS_CORRUPTION_ERROR("xlog_recover_inode_pass2(3)",
- XFS_ERRLEVEL_LOW, mp, ldip);
+ XFS_ERRLEVEL_LOW, mp, ldip,
+ sizeof(*ldip));
xfs_alert(mp,
"%s: Bad regular inode log record, rec ptr "PTR_FMT", "
"ino ptr = "PTR_FMT", ino bp = "PTR_FMT", ino %Ld",
@@ -3128,7 +3137,8 @@ xlog_recover_inode_pass2(
(ldip->di_format != XFS_DINODE_FMT_BTREE) &&
(ldip->di_format != XFS_DINODE_FMT_LOCAL)) {
XFS_CORRUPTION_ERROR("xlog_recover_inode_pass2(4)",
- XFS_ERRLEVEL_LOW, mp, ldip);
+ XFS_ERRLEVEL_LOW, mp, ldip,
+ sizeof(*ldip));
xfs_alert(mp,
"%s: Bad dir inode log record, rec ptr "PTR_FMT", "
"ino ptr = "PTR_FMT", ino bp = "PTR_FMT", ino %Ld",
@@ -3139,7 +3149,8 @@ xlog_recover_inode_pass2(
}
if (unlikely(ldip->di_nextents + ldip->di_anextents > ldip->di_nblocks)){
XFS_CORRUPTION_ERROR("xlog_recover_inode_pass2(5)",
- XFS_ERRLEVEL_LOW, mp, ldip);
+ XFS_ERRLEVEL_LOW, mp, ldip,
+ sizeof(*ldip));
xfs_alert(mp,
"%s: Bad inode log record, rec ptr "PTR_FMT", dino ptr "PTR_FMT", "
"dino bp "PTR_FMT", ino %Ld, total extents = %d, nblocks = %Ld",
@@ -3151,7 +3162,8 @@ xlog_recover_inode_pass2(
}
if (unlikely(ldip->di_forkoff > mp->m_sb.sb_inodesize)) {
XFS_CORRUPTION_ERROR("xlog_recover_inode_pass2(6)",
- XFS_ERRLEVEL_LOW, mp, ldip);
+ XFS_ERRLEVEL_LOW, mp, ldip,
+ sizeof(*ldip));
xfs_alert(mp,
"%s: Bad inode log record, rec ptr "PTR_FMT", dino ptr "PTR_FMT", "
"dino bp "PTR_FMT", ino %Ld, forkoff 0x%x", __func__,
@@ -3162,7 +3174,8 @@ xlog_recover_inode_pass2(
isize = xfs_log_dinode_size(ldip->di_version);
if (unlikely(item->ri_buf[1].i_len > isize)) {
XFS_CORRUPTION_ERROR("xlog_recover_inode_pass2(7)",
- XFS_ERRLEVEL_LOW, mp, ldip);
+ XFS_ERRLEVEL_LOW, mp, ldip,
+ sizeof(*ldip));
xfs_alert(mp,
"%s: Bad inode log record length %d, rec ptr "PTR_FMT,
__func__, item->ri_buf[1].i_len, item);
@@ -3348,7 +3361,7 @@ xlog_recover_dquot_pass2(
*/
dq_f = item->ri_buf[0].i_addr;
ASSERT(dq_f);
- fa = xfs_dquot_verify(mp, recddq, dq_f->qlf_id, 0, 0);
+ fa = xfs_dquot_verify(mp, recddq, dq_f->qlf_id, 0);
if (fa) {
xfs_alert(mp, "corrupt dquot ID 0x%x in log at %pS",
dq_f->qlf_id, fa);
@@ -5466,9 +5479,7 @@ xlog_do_recovery_pass(
*/
if (blk_no + bblks <= log->l_logBBsize ||
blk_no >= log->l_logBBsize) {
- /* mod blk_no in case the header wrapped and
- * pushed it beyond the end of the log */
- rblk_no = do_mod(blk_no, log->l_logBBsize);
+ rblk_no = xlog_wrap_logbno(log, blk_no);
error = xlog_bread(log, rblk_no, bblks, dbp,
&offset);
if (error)
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.