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xfs: clean up calculation of LR header blocks 

Let's use DIV_ROUND_UP() to calculate log record header
blocks as what did in xlog_get_iclog_buffer_size() and
wrap up a common helper for log recovery.

Reviewed-by: Brian Foster <bfoster@redhat.com>
Signed-off-by: Gao Xiang <hsiangkao@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
This commit is contained in:
Gao Xiang 2020-09-22 09:41:06 -07:00 committed by Darrick J. Wong
parent f692d09e9c
commit 0c771b99d6
2 changed files with 18 additions and 35 deletions
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4
fs/xfs/xfs_log.c
View File

@ -1604,9 +1604,7 @@ xlog_cksum(
int i;
int xheads;
xheads = size / XLOG_HEADER_CYCLE_SIZE;
if (size % XLOG_HEADER_CYCLE_SIZE)
xheads++;
xheads = DIV_ROUND_UP(size, XLOG_HEADER_CYCLE_SIZE);
for (i = 1; i < xheads; i++) {
crc = crc32c(crc, &xhdr[i].hic_xheader,

49
fs/xfs/xfs_log_recover.c
View File

@ -371,6 +371,19 @@ out:
return error;
}
static inline int
xlog_logrec_hblks(struct xlog *log, struct xlog_rec_header *rh)
{
if (xfs_sb_version_haslogv2(&log->l_mp->m_sb)) {
int h_size = be32_to_cpu(rh->h_size);
if ((be32_to_cpu(rh->h_version) & XLOG_VERSION_2) &&
h_size > XLOG_HEADER_CYCLE_SIZE)
return DIV_ROUND_UP(h_size, XLOG_HEADER_CYCLE_SIZE);
}
return 1;
}
/*
* Potentially backup over partial log record write.
*
@ -463,15 +476,7 @@ xlog_find_verify_log_record(
* reset last_blk. Only when last_blk points in the middle of a log
* record do we update last_blk.
*/
if (xfs_sb_version_haslogv2(&log->l_mp->m_sb)) {
uint h_size = be32_to_cpu(head->h_size);
xhdrs = h_size / XLOG_HEADER_CYCLE_SIZE;
if (h_size % XLOG_HEADER_CYCLE_SIZE)
xhdrs++;
} else {
xhdrs = 1;
}
xhdrs = xlog_logrec_hblks(log, head);
if (*last_blk - i + extra_bblks !=
BTOBB(be32_to_cpu(head->h_len)) + xhdrs)
@ -1158,22 +1163,7 @@ xlog_check_unmount_rec(
* below. We won't want to clear the unmount record if there is one, so
* we pass the lsn of the unmount record rather than the block after it.
*/
if (xfs_sb_version_haslogv2(&log->l_mp->m_sb)) {
int h_size = be32_to_cpu(rhead->h_size);
int h_version = be32_to_cpu(rhead->h_version);
if ((h_version & XLOG_VERSION_2) &&
(h_size > XLOG_HEADER_CYCLE_SIZE)) {
hblks = h_size / XLOG_HEADER_CYCLE_SIZE;
if (h_size % XLOG_HEADER_CYCLE_SIZE)
hblks++;
} else {
hblks = 1;
}
} else {
hblks = 1;
}
hblks = xlog_logrec_hblks(log, rhead);
after_umount_blk = xlog_wrap_logbno(log,
rhead_blk + hblks + BTOBB(be32_to_cpu(rhead->h_len)));
@ -2989,15 +2979,10 @@ xlog_do_recovery_pass(
if (error)
goto bread_err1;
if ((be32_to_cpu(rhead->h_version) & XLOG_VERSION_2) &&
(h_size > XLOG_HEADER_CYCLE_SIZE)) {
hblks = h_size / XLOG_HEADER_CYCLE_SIZE;
if (h_size % XLOG_HEADER_CYCLE_SIZE)
hblks++;
hblks = xlog_logrec_hblks(log, rhead);
if (hblks != 1) {
kmem_free(hbp);
hbp = xlog_alloc_buffer(log, hblks);
} else {
hblks = 1;
}
} else {
ASSERT(log->l_sectBBsize == 1);