mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-12 05:24:12 +08:00
250d4b4c40
There are many, many xfs header files which are included but unneeded (or included twice) in the xfs code, so remove them. nb: xfs_linux.h includes about 9 headers for everyone, so those explicit includes get removed by this. I'm not sure what the preference is, but if we wanted explicit includes everywhere, a followup patch could remove those xfs_*.h includes from xfs_linux.h and move them into the files that need them. Or it could be left as-is. Signed-off-by: Eric Sandeen <sandeen@redhat.com> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
135 lines
4.0 KiB
C
135 lines
4.0 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* Copyright (c) 2013 Jie Liu.
|
|
* All Rights Reserved.
|
|
*/
|
|
#include "xfs.h"
|
|
#include "xfs_fs.h"
|
|
#include "xfs_shared.h"
|
|
#include "xfs_format.h"
|
|
#include "xfs_log_format.h"
|
|
#include "xfs_trans_resv.h"
|
|
#include "xfs_mount.h"
|
|
#include "xfs_da_format.h"
|
|
#include "xfs_trans_space.h"
|
|
#include "xfs_da_btree.h"
|
|
#include "xfs_bmap_btree.h"
|
|
|
|
/*
|
|
* Calculate the maximum length in bytes that would be required for a local
|
|
* attribute value as large attributes out of line are not logged.
|
|
*/
|
|
STATIC int
|
|
xfs_log_calc_max_attrsetm_res(
|
|
struct xfs_mount *mp)
|
|
{
|
|
int size;
|
|
int nblks;
|
|
|
|
size = xfs_attr_leaf_entsize_local_max(mp->m_attr_geo->blksize) -
|
|
MAXNAMELEN - 1;
|
|
nblks = XFS_DAENTER_SPACE_RES(mp, XFS_ATTR_FORK);
|
|
nblks += XFS_B_TO_FSB(mp, size);
|
|
nblks += XFS_NEXTENTADD_SPACE_RES(mp, size, XFS_ATTR_FORK);
|
|
|
|
return M_RES(mp)->tr_attrsetm.tr_logres +
|
|
M_RES(mp)->tr_attrsetrt.tr_logres * nblks;
|
|
}
|
|
|
|
/*
|
|
* Iterate over the log space reservation table to figure out and return
|
|
* the maximum one in terms of the pre-calculated values which were done
|
|
* at mount time.
|
|
*/
|
|
void
|
|
xfs_log_get_max_trans_res(
|
|
struct xfs_mount *mp,
|
|
struct xfs_trans_res *max_resp)
|
|
{
|
|
struct xfs_trans_res *resp;
|
|
struct xfs_trans_res *end_resp;
|
|
int log_space = 0;
|
|
int attr_space;
|
|
|
|
attr_space = xfs_log_calc_max_attrsetm_res(mp);
|
|
|
|
resp = (struct xfs_trans_res *)M_RES(mp);
|
|
end_resp = (struct xfs_trans_res *)(M_RES(mp) + 1);
|
|
for (; resp < end_resp; resp++) {
|
|
int tmp = resp->tr_logcount > 1 ?
|
|
resp->tr_logres * resp->tr_logcount :
|
|
resp->tr_logres;
|
|
if (log_space < tmp) {
|
|
log_space = tmp;
|
|
*max_resp = *resp; /* struct copy */
|
|
}
|
|
}
|
|
|
|
if (attr_space > log_space) {
|
|
*max_resp = M_RES(mp)->tr_attrsetm; /* struct copy */
|
|
max_resp->tr_logres = attr_space;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Calculate the minimum valid log size for the given superblock configuration.
|
|
* Used to calculate the minimum log size at mkfs time, and to determine if
|
|
* the log is large enough or not at mount time. Returns the minimum size in
|
|
* filesystem block size units.
|
|
*/
|
|
int
|
|
xfs_log_calc_minimum_size(
|
|
struct xfs_mount *mp)
|
|
{
|
|
struct xfs_trans_res tres = {0};
|
|
int max_logres;
|
|
int min_logblks = 0;
|
|
int lsunit = 0;
|
|
|
|
xfs_log_get_max_trans_res(mp, &tres);
|
|
|
|
max_logres = xfs_log_calc_unit_res(mp, tres.tr_logres);
|
|
if (tres.tr_logcount > 1)
|
|
max_logres *= tres.tr_logcount;
|
|
|
|
if (xfs_sb_version_haslogv2(&mp->m_sb) && mp->m_sb.sb_logsunit > 1)
|
|
lsunit = BTOBB(mp->m_sb.sb_logsunit);
|
|
|
|
/*
|
|
* Two factors should be taken into account for calculating the minimum
|
|
* log space.
|
|
* 1) The fundamental limitation is that no single transaction can be
|
|
* larger than half size of the log.
|
|
*
|
|
* From mkfs.xfs, this is considered by the XFS_MIN_LOG_FACTOR
|
|
* define, which is set to 3. That means we can definitely fit
|
|
* maximally sized 2 transactions in the log. We'll use this same
|
|
* value here.
|
|
*
|
|
* 2) If the lsunit option is specified, a transaction requires 2 LSU
|
|
* for the reservation because there are two log writes that can
|
|
* require padding - the transaction data and the commit record which
|
|
* are written separately and both can require padding to the LSU.
|
|
* Consider that we can have an active CIL reservation holding 2*LSU,
|
|
* but the CIL is not over a push threshold, in this case, if we
|
|
* don't have enough log space for at one new transaction, which
|
|
* includes another 2*LSU in the reservation, we will run into dead
|
|
* loop situation in log space grant procedure. i.e.
|
|
* xlog_grant_head_wait().
|
|
*
|
|
* Hence the log size needs to be able to contain two maximally sized
|
|
* and padded transactions, which is (2 * (2 * LSU + maxlres)).
|
|
*
|
|
* Also, the log size should be a multiple of the log stripe unit, round
|
|
* it up to lsunit boundary if lsunit is specified.
|
|
*/
|
|
if (lsunit) {
|
|
min_logblks = roundup_64(BTOBB(max_logres), lsunit) +
|
|
2 * lsunit;
|
|
} else
|
|
min_logblks = BTOBB(max_logres) + 2 * BBSIZE;
|
|
min_logblks *= XFS_MIN_LOG_FACTOR;
|
|
|
|
return XFS_BB_TO_FSB(mp, min_logblks);
|
|
}
|