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xfs: refactor log recovery CUI item dispatch for pass2 commit functions 

Move the refcount update intent and intent-done pass2 commit code into
the per-item source code files and use dispatch functions to call them.
We do these one at a time because there's a lot of code to move.  No
functional changes.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Chandan Babu R <chandanrlinux@gmail.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Darrick J. Wong 2020-05-01 16:00:49 -07:00
parent 07590a9d38
commit 9b4467e983
3 changed files with 127 additions and 128 deletions
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124
fs/xfs/xfs_log_recover.c
View File

@ -2034,126 +2034,6 @@ xlog_buf_readahead(
xfs_buf_readahead(log->l_mp->m_ddev_targp, blkno, len, ops);
}
/*
* Copy an CUI format buffer from the given buf, and into the destination
* CUI format structure. The CUI/CUD items were designed not to need any
* special alignment handling.
*/
static int
xfs_cui_copy_format(
struct xfs_log_iovec *buf,
struct xfs_cui_log_format *dst_cui_fmt)
{
struct xfs_cui_log_format *src_cui_fmt;
uint len;
src_cui_fmt = buf->i_addr;
len = xfs_cui_log_format_sizeof(src_cui_fmt->cui_nextents);
if (buf->i_len == len) {
memcpy(dst_cui_fmt, src_cui_fmt, len);
return 0;
}
XFS_ERROR_REPORT(__func__, XFS_ERRLEVEL_LOW, NULL);
return -EFSCORRUPTED;
}
/*
* This routine is called to create an in-core extent refcount update
* item from the cui format structure which was logged on disk.
* It allocates an in-core cui, copies the extents from the format
* structure into it, and adds the cui to the AIL with the given
* LSN.
*/
STATIC int
xlog_recover_cui_pass2(
struct xlog *log,
struct xlog_recover_item *item,
xfs_lsn_t lsn)
{
int error;
struct xfs_mount *mp = log->l_mp;
struct xfs_cui_log_item *cuip;
struct xfs_cui_log_format *cui_formatp;
cui_formatp = item->ri_buf[0].i_addr;
cuip = xfs_cui_init(mp, cui_formatp->cui_nextents);
error = xfs_cui_copy_format(&item->ri_buf[0], &cuip->cui_format);
if (error) {
xfs_cui_item_free(cuip);
return error;
}
atomic_set(&cuip->cui_next_extent, cui_formatp->cui_nextents);
spin_lock(&log->l_ailp->ail_lock);
/*
* The CUI has two references. One for the CUD and one for CUI to ensure
* it makes it into the AIL. Insert the CUI into the AIL directly and
* drop the CUI reference. Note that xfs_trans_ail_update() drops the
* AIL lock.
*/
xfs_trans_ail_update(log->l_ailp, &cuip->cui_item, lsn);
xfs_cui_release(cuip);
return 0;
}
/*
* This routine is called when an CUD format structure is found in a committed
* transaction in the log. Its purpose is to cancel the corresponding CUI if it
* was still in the log. To do this it searches the AIL for the CUI with an id
* equal to that in the CUD format structure. If we find it we drop the CUD
* reference, which removes the CUI from the AIL and frees it.
*/
STATIC int
xlog_recover_cud_pass2(
struct xlog *log,
struct xlog_recover_item *item)
{
struct xfs_cud_log_format *cud_formatp;
struct xfs_cui_log_item *cuip = NULL;
struct xfs_log_item *lip;
uint64_t cui_id;
struct xfs_ail_cursor cur;
struct xfs_ail *ailp = log->l_ailp;
cud_formatp = item->ri_buf[0].i_addr;
if (item->ri_buf[0].i_len != sizeof(struct xfs_cud_log_format)) {
XFS_ERROR_REPORT(__func__, XFS_ERRLEVEL_LOW, log->l_mp);
return -EFSCORRUPTED;
}
cui_id = cud_formatp->cud_cui_id;
/*
* Search for the CUI with the id in the CUD format structure in the
* AIL.
*/
spin_lock(&ailp->ail_lock);
lip = xfs_trans_ail_cursor_first(ailp, &cur, 0);
while (lip != NULL) {
if (lip->li_type == XFS_LI_CUI) {
cuip = (struct xfs_cui_log_item *)lip;
if (cuip->cui_format.cui_id == cui_id) {
/*
* Drop the CUD reference to the CUI. This
* removes the CUI from the AIL and frees it.
*/
spin_unlock(&ailp->ail_lock);
xfs_cui_release(cuip);
spin_lock(&ailp->ail_lock);
break;
}
}
lip = xfs_trans_ail_cursor_next(ailp, &cur);
}
xfs_trans_ail_cursor_done(&cur);
spin_unlock(&ailp->ail_lock);
return 0;
}
/*
* Copy an BUI format buffer from the given buf, and into the destination
* BUI format structure. The BUI/BUD items were designed not to need any
@ -2292,10 +2172,6 @@ xlog_recover_commit_pass2(
trans->r_lsn);
switch (ITEM_TYPE(item)) {
case XFS_LI_CUI:
return xlog_recover_cui_pass2(log, item, trans->r_lsn);
case XFS_LI_CUD:
return xlog_recover_cud_pass2(log, item);
case XFS_LI_BUI:
return xlog_recover_bui_pass2(log, item, trans->r_lsn);
case XFS_LI_BUD:

129
fs/xfs/xfs_refcount_item.c
View File

@ -18,6 +18,7 @@
#include "xfs_log.h"
#include "xfs_refcount.h"
#include "xfs_error.h"
#include "xfs_log_priv.h"
#include "xfs_log_recover.h"
kmem_zone_t *xfs_cui_zone;
@ -28,7 +29,7 @@ static inline struct xfs_cui_log_item *CUI_ITEM(struct xfs_log_item *lip)
return container_of(lip, struct xfs_cui_log_item, cui_item);
}
void
STATIC void
xfs_cui_item_free(
struct xfs_cui_log_item *cuip)
{
@ -134,7 +135,7 @@ static const struct xfs_item_ops xfs_cui_item_ops = {
/*
* Allocate and initialize an cui item with the given number of extents.
*/
struct xfs_cui_log_item *
STATIC struct xfs_cui_log_item *
xfs_cui_init(
struct xfs_mount *mp,
uint nextents)
@ -572,10 +573,134 @@ xfs_cui_recover(
return error;
}
/*
* Copy an CUI format buffer from the given buf, and into the destination
* CUI format structure. The CUI/CUD items were designed not to need any
* special alignment handling.
*/
static int
xfs_cui_copy_format(
struct xfs_log_iovec *buf,
struct xfs_cui_log_format *dst_cui_fmt)
{
struct xfs_cui_log_format *src_cui_fmt;
uint len;
src_cui_fmt = buf->i_addr;
len = xfs_cui_log_format_sizeof(src_cui_fmt->cui_nextents);
if (buf->i_len == len) {
memcpy(dst_cui_fmt, src_cui_fmt, len);
return 0;
}
XFS_ERROR_REPORT(__func__, XFS_ERRLEVEL_LOW, NULL);
return -EFSCORRUPTED;
}
/*
* This routine is called to create an in-core extent refcount update
* item from the cui format structure which was logged on disk.
* It allocates an in-core cui, copies the extents from the format
* structure into it, and adds the cui to the AIL with the given
* LSN.
*/
STATIC int
xlog_recover_cui_commit_pass2(
struct xlog *log,
struct list_head *buffer_list,
struct xlog_recover_item *item,
xfs_lsn_t lsn)
{
int error;
struct xfs_mount *mp = log->l_mp;
struct xfs_cui_log_item *cuip;
struct xfs_cui_log_format *cui_formatp;
cui_formatp = item->ri_buf[0].i_addr;
cuip = xfs_cui_init(mp, cui_formatp->cui_nextents);
error = xfs_cui_copy_format(&item->ri_buf[0], &cuip->cui_format);
if (error) {
xfs_cui_item_free(cuip);
return error;
}
atomic_set(&cuip->cui_next_extent, cui_formatp->cui_nextents);
spin_lock(&log->l_ailp->ail_lock);
/*
* The CUI has two references. One for the CUD and one for CUI to ensure
* it makes it into the AIL. Insert the CUI into the AIL directly and
* drop the CUI reference. Note that xfs_trans_ail_update() drops the
* AIL lock.
*/
xfs_trans_ail_update(log->l_ailp, &cuip->cui_item, lsn);
xfs_cui_release(cuip);
return 0;
}
const struct xlog_recover_item_ops xlog_cui_item_ops = {
.item_type = XFS_LI_CUI,
.commit_pass2 = xlog_recover_cui_commit_pass2,
};
/*
* This routine is called when an CUD format structure is found in a committed
* transaction in the log. Its purpose is to cancel the corresponding CUI if it
* was still in the log. To do this it searches the AIL for the CUI with an id
* equal to that in the CUD format structure. If we find it we drop the CUD
* reference, which removes the CUI from the AIL and frees it.
*/
STATIC int
xlog_recover_cud_commit_pass2(
struct xlog *log,
struct list_head *buffer_list,
struct xlog_recover_item *item,
xfs_lsn_t lsn)
{
struct xfs_cud_log_format *cud_formatp;
struct xfs_cui_log_item *cuip = NULL;
struct xfs_log_item *lip;
uint64_t cui_id;
struct xfs_ail_cursor cur;
struct xfs_ail *ailp = log->l_ailp;
cud_formatp = item->ri_buf[0].i_addr;
if (item->ri_buf[0].i_len != sizeof(struct xfs_cud_log_format)) {
XFS_ERROR_REPORT(__func__, XFS_ERRLEVEL_LOW, log->l_mp);
return -EFSCORRUPTED;
}
cui_id = cud_formatp->cud_cui_id;
/*
* Search for the CUI with the id in the CUD format structure in the
* AIL.
*/
spin_lock(&ailp->ail_lock);
lip = xfs_trans_ail_cursor_first(ailp, &cur, 0);
while (lip != NULL) {
if (lip->li_type == XFS_LI_CUI) {
cuip = (struct xfs_cui_log_item *)lip;
if (cuip->cui_format.cui_id == cui_id) {
/*
* Drop the CUD reference to the CUI. This
* removes the CUI from the AIL and frees it.
*/
spin_unlock(&ailp->ail_lock);
xfs_cui_release(cuip);
spin_lock(&ailp->ail_lock);
break;
}
}
lip = xfs_trans_ail_cursor_next(ailp, &cur);
}
xfs_trans_ail_cursor_done(&cur);
spin_unlock(&ailp->ail_lock);
return 0;
}
const struct xlog_recover_item_ops xlog_cud_item_ops = {
.item_type = XFS_LI_CUD,
.commit_pass2 = xlog_recover_cud_commit_pass2,
};

2
fs/xfs/xfs_refcount_item.h
View File

@ -77,8 +77,6 @@ struct xfs_cud_log_item {
extern struct kmem_zone *xfs_cui_zone;
extern struct kmem_zone *xfs_cud_zone;
struct xfs_cui_log_item *xfs_cui_init(struct xfs_mount *, uint);
void xfs_cui_item_free(struct xfs_cui_log_item *);
void xfs_cui_release(struct xfs_cui_log_item *);
int xfs_cui_recover(struct xfs_trans *parent_tp, struct xfs_cui_log_item *cuip);