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xfs: cleanup xlog_get_iclog_buffer_size

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We don't really need all the messy branches in the function, as it
really does three things, out of which 2 are common for all branches:

 1) set up mount point log buffer size and count values if not already
    done from mount options
 2) calculate the number of log headers
 3) set up all the values in struct xlog based on the above

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dave Chinner <dchinner@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:
Christoph Hellwig 2019-06-28 19:27:20 -07:00 committed by Darrick J. Wong
parent 76ce9823ac
commit 4f62282a36
1 changed files with 11 additions and 41 deletions
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52
fs/xfs/xfs_log.c
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@ -1301,56 +1301,26 @@ xlog_iodone(xfs_buf_t *bp)
* If the filesystem blocksize is too large, we may need to choose a
* larger size since the directory code currently logs entire blocks.
*/
STATIC void
xlog_get_iclog_buffer_size(
struct xfs_mount *mp,
struct xlog *log)
{
int xhdrs;
if (mp->m_logbufs <= 0)
log->l_iclog_bufs = XLOG_MAX_ICLOGS;
else
log->l_iclog_bufs = mp->m_logbufs;
mp->m_logbufs = XLOG_MAX_ICLOGS;
if (mp->m_logbsize <= 0)
mp->m_logbsize = XLOG_BIG_RECORD_BSIZE;
log->l_iclog_bufs = mp->m_logbufs;
log->l_iclog_size = mp->m_logbsize;
/*
* Buffer size passed in from mount system call.
* # headers = size / 32k - one header holds cycles from 32k of data.
*/
if (mp->m_logbsize > 0) {
if (xfs_sb_version_haslogv2(&mp->m_sb)) {
/* # headers = size / 32k
* one header holds cycles from 32k of data
*/
xhdrs = mp->m_logbsize / XLOG_HEADER_CYCLE_SIZE;
if (mp->m_logbsize % XLOG_HEADER_CYCLE_SIZE)
xhdrs++;
log->l_iclog_hsize = xhdrs << BBSHIFT;
log->l_iclog_heads = xhdrs;
} else {
ASSERT(mp->m_logbsize <= XLOG_BIG_RECORD_BSIZE);
log->l_iclog_hsize = BBSIZE;
log->l_iclog_heads = 1;
}
goto done;
}
/* All machines use 32kB buffers by default. */
log->l_iclog_size = XLOG_BIG_RECORD_BSIZE;
/* the default log size is 16k or 32k which is one header sector */
log->l_iclog_hsize = BBSIZE;
log->l_iclog_heads = 1;
done:
/* are we being asked to make the sizes selected above visible? */
if (mp->m_logbufs == 0)
mp->m_logbufs = log->l_iclog_bufs;
if (mp->m_logbsize == 0)
mp->m_logbsize = log->l_iclog_size;
} /* xlog_get_iclog_buffer_size */
log->l_iclog_heads =
DIV_ROUND_UP(mp->m_logbsize, XLOG_HEADER_CYCLE_SIZE);
log->l_iclog_hsize = log->l_iclog_heads << BBSHIFT;
}
void
xfs_log_work_queue(