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xfs: refactor log recovery item sorting into a generic dispatch structure

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Create a generic dispatch structure to delegate recovery of different
log item types into various code modules.  This will enable us to move
code specific to a particular log item type out of xfs_log_recover.c and
into the log item source.

The first operation we virtualize is the log item sorting.

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 16:00:45 -07:00
parent 35f4521fd3
commit 86ffa471d9
11 changed files with 265 additions and 39 deletions
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3
fs/xfs/Makefile
View File

@ -99,9 +99,12 @@ xfs-y += xfs_log.o \
xfs_log_cil.o \
xfs_bmap_item.o \
xfs_buf_item.o \
xfs_buf_item_recover.o \
xfs_dquot_item_recover.o \
xfs_extfree_item.o \
xfs_icreate_item.o \
xfs_inode_item.o \
xfs_inode_item_recover.o \
xfs_refcount_item.o \
xfs_rmap_item.o \
xfs_log_recover.o \

45
fs/xfs/libxfs/xfs_log_recover.h
View File

@ -6,6 +6,47 @@
#ifndef __XFS_LOG_RECOVER_H__
#define __XFS_LOG_RECOVER_H__
/*
* Each log item type (XFS_LI_*) gets its own xlog_recover_item_ops to
* define how recovery should work for that type of log item.
*/
struct xlog_recover_item;
/* Sorting hat for log items as they're read in. */
enum xlog_recover_reorder {
XLOG_REORDER_BUFFER_LIST,
XLOG_REORDER_ITEM_LIST,
XLOG_REORDER_INODE_BUFFER_LIST,
XLOG_REORDER_CANCEL_LIST,
};
struct xlog_recover_item_ops {
uint16_t item_type; /* XFS_LI_* type code. */
/*
* Help sort recovered log items into the order required to replay them
* correctly. Log item types that always use XLOG_REORDER_ITEM_LIST do
* not have to supply a function here. See the comment preceding
* xlog_recover_reorder_trans for more details about what the return
* values mean.
*/
enum xlog_recover_reorder (*reorder)(struct xlog_recover_item *item);
};
extern const struct xlog_recover_item_ops xlog_icreate_item_ops;
extern const struct xlog_recover_item_ops xlog_buf_item_ops;
extern const struct xlog_recover_item_ops xlog_inode_item_ops;
extern const struct xlog_recover_item_ops xlog_dquot_item_ops;
extern const struct xlog_recover_item_ops xlog_quotaoff_item_ops;
extern const struct xlog_recover_item_ops xlog_bui_item_ops;
extern const struct xlog_recover_item_ops xlog_bud_item_ops;
extern const struct xlog_recover_item_ops xlog_efi_item_ops;
extern const struct xlog_recover_item_ops xlog_efd_item_ops;
extern const struct xlog_recover_item_ops xlog_rui_item_ops;
extern const struct xlog_recover_item_ops xlog_rud_item_ops;
extern const struct xlog_recover_item_ops xlog_cui_item_ops;
extern const struct xlog_recover_item_ops xlog_cud_item_ops;
/*
* Macros, structures, prototypes for internal log manager use.
*/
@ -24,10 +65,10 @@
*/
struct xlog_recover_item {
struct list_head ri_list;
int ri_type;
int ri_cnt; /* count of regions found */
int ri_total; /* total regions */
xfs_log_iovec_t *ri_buf; /* ptr to regions buffer */
struct xfs_log_iovec *ri_buf; /* ptr to regions buffer */
const struct xlog_recover_item_ops *ri_ops;
};
struct xlog_recover {

9
fs/xfs/xfs_bmap_item.c
View File

@ -22,6 +22,7 @@
#include "xfs_bmap_btree.h"
#include "xfs_trans_space.h"
#include "xfs_error.h"
#include "xfs_log_recover.h"
kmem_zone_t *xfs_bui_zone;
kmem_zone_t *xfs_bud_zone;
@ -557,3 +558,11 @@ xfs_bui_recover(
}
return error;
}
const struct xlog_recover_item_ops xlog_bui_item_ops = {
.item_type = XFS_LI_BUI,
};
const struct xlog_recover_item_ops xlog_bud_item_ops = {
.item_type = XFS_LI_BUD,
};

52
fs/xfs/xfs_buf_item_recover.c Normal file
View File

@ -0,0 +1,52 @@
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2000-2006 Silicon Graphics, Inc.
* 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_bit.h"
#include "xfs_mount.h"
#include "xfs_trans.h"
#include "xfs_buf_item.h"
#include "xfs_trans_priv.h"
#include "xfs_trace.h"
#include "xfs_log.h"
#include "xfs_log_priv.h"
#include "xfs_log_recover.h"
/*
* Sort buffer items for log recovery. Most buffer items should end up on the
* buffer list and are recovered first, with the following exceptions:
*
* 1. XFS_BLF_CANCEL buffers must be processed last because some log items
* might depend on the incor ecancellation record, and replaying a cancelled
* buffer item can remove the incore record.
*
* 2. XFS_BLF_INODE_BUF buffers are handled after most regular items so that
* we replay di_next_unlinked only after flushing the inode 'free' state
* to the inode buffer.
*
* See xlog_recover_reorder_trans for more details.
*/
STATIC enum xlog_recover_reorder
xlog_recover_buf_reorder(
struct xlog_recover_item *item)
{
struct xfs_buf_log_format *buf_f = item->ri_buf[0].i_addr;
if (buf_f->blf_flags & XFS_BLF_CANCEL)
return XLOG_REORDER_CANCEL_LIST;
if (buf_f->blf_flags & XFS_BLF_INODE_BUF)
return XLOG_REORDER_INODE_BUFFER_LIST;
return XLOG_REORDER_BUFFER_LIST;
}
const struct xlog_recover_item_ops xlog_buf_item_ops = {
.item_type = XFS_LI_BUF,
.reorder = xlog_recover_buf_reorder,
};

29
fs/xfs/xfs_dquot_item_recover.c Normal file
View File

@ -0,0 +1,29 @@
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2000-2006 Silicon Graphics, Inc.
* 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_inode.h"
#include "xfs_quota.h"
#include "xfs_trans.h"
#include "xfs_buf_item.h"
#include "xfs_trans_priv.h"
#include "xfs_qm.h"
#include "xfs_log.h"
#include "xfs_log_priv.h"
#include "xfs_log_recover.h"
const struct xlog_recover_item_ops xlog_dquot_item_ops = {
.item_type = XFS_LI_DQUOT,
};
const struct xlog_recover_item_ops xlog_quotaoff_item_ops = {
.item_type = XFS_LI_QUOTAOFF,
};

9
fs/xfs/xfs_extfree_item.c
View File

@ -22,6 +22,7 @@
#include "xfs_bmap.h"
#include "xfs_trace.h"
#include "xfs_error.h"
#include "xfs_log_recover.h"
kmem_zone_t *xfs_efi_zone;
kmem_zone_t *xfs_efd_zone;
@ -644,3 +645,11 @@ xfs_efi_recover(
xfs_trans_cancel(tp);
return error;
}
const struct xlog_recover_item_ops xlog_efi_item_ops = {
.item_type = XFS_LI_EFI,
};
const struct xlog_recover_item_ops xlog_efd_item_ops = {
.item_type = XFS_LI_EFD,
};

20
fs/xfs/xfs_icreate_item.c
View File

@ -11,6 +11,8 @@
#include "xfs_trans_priv.h"
#include "xfs_icreate_item.h"
#include "xfs_log.h"
#include "xfs_log_priv.h"
#include "xfs_log_recover.h"
kmem_zone_t *xfs_icreate_zone; /* inode create item zone */
@ -107,3 +109,21 @@ xfs_icreate_log(
tp->t_flags |= XFS_TRANS_DIRTY;
set_bit(XFS_LI_DIRTY, &icp->ic_item.li_flags);
}
static enum xlog_recover_reorder
xlog_recover_icreate_reorder(
struct xlog_recover_item *item)
{
/*
* Inode allocation buffers must be replayed before subsequent inode
* items try to modify those buffers. ICREATE items are the logical
* equivalent of logging a newly initialized inode buffer, so recover
* these at the same time that we recover logged buffers.
*/
return XLOG_REORDER_BUFFER_LIST;
}
const struct xlog_recover_item_ops xlog_icreate_item_ops = {
.item_type = XFS_LI_ICREATE,
.reorder = xlog_recover_icreate_reorder,
};

26
fs/xfs/xfs_inode_item_recover.c Normal file
View File

@ -0,0 +1,26 @@
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2000-2006 Silicon Graphics, Inc.
* 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_inode.h"
#include "xfs_trans.h"
#include "xfs_inode_item.h"
#include "xfs_trace.h"
#include "xfs_trans_priv.h"
#include "xfs_buf_item.h"
#include "xfs_log.h"
#include "xfs_error.h"
#include "xfs_log_priv.h"
#include "xfs_log_recover.h"
const struct xlog_recover_item_ops xlog_inode_item_ops = {
.item_type = XFS_LI_INODE,
};

93
fs/xfs/xfs_log_recover.c
View File

@ -1785,6 +1785,34 @@ xlog_clear_stale_blocks(
*
******************************************************************************
*/
static const struct xlog_recover_item_ops *xlog_recover_item_ops[] = {
&xlog_buf_item_ops,
&xlog_inode_item_ops,
&xlog_dquot_item_ops,
&xlog_quotaoff_item_ops,
&xlog_icreate_item_ops,
&xlog_efi_item_ops,
&xlog_efd_item_ops,
&xlog_rui_item_ops,
&xlog_rud_item_ops,
&xlog_cui_item_ops,
&xlog_cud_item_ops,
&xlog_bui_item_ops,
&xlog_bud_item_ops,
};
static const struct xlog_recover_item_ops *
xlog_find_item_ops(
struct xlog_recover_item *item)
{
unsigned int i;
for (i = 0; i < ARRAY_SIZE(xlog_recover_item_ops); i++)
if (ITEM_TYPE(item) == xlog_recover_item_ops[i]->item_type)
return xlog_recover_item_ops[i];
return NULL;
}
/*
* Sort the log items in the transaction.
@ -1851,41 +1879,10 @@ xlog_recover_reorder_trans(
list_splice_init(&trans->r_itemq, &sort_list);
list_for_each_entry_safe(item, n, &sort_list, ri_list) {
xfs_buf_log_format_t *buf_f = item->ri_buf[0].i_addr;
enum xlog_recover_reorder fate = XLOG_REORDER_ITEM_LIST;
switch (ITEM_TYPE(item)) {
case XFS_LI_ICREATE:
list_move_tail(&item->ri_list, &buffer_list);
break;
case XFS_LI_BUF:
if (buf_f->blf_flags & XFS_BLF_CANCEL) {
trace_xfs_log_recover_item_reorder_head(log,
trans, item, pass);
list_move(&item->ri_list, &cancel_list);
break;
}
if (buf_f->blf_flags & XFS_BLF_INODE_BUF) {
list_move(&item->ri_list, &inode_buffer_list);
break;
}
list_move_tail(&item->ri_list, &buffer_list);
break;
case XFS_LI_INODE:
case XFS_LI_DQUOT:
case XFS_LI_QUOTAOFF:
case XFS_LI_EFD:
case XFS_LI_EFI:
case XFS_LI_RUI:
case XFS_LI_RUD:
case XFS_LI_CUI:
case XFS_LI_CUD:
case XFS_LI_BUI:
case XFS_LI_BUD:
trace_xfs_log_recover_item_reorder_tail(log,
trans, item, pass);
list_move_tail(&item->ri_list, &item_list);
break;
default:
item->ri_ops = xlog_find_item_ops(item);
if (!item->ri_ops) {
xfs_warn(log->l_mp,
"%s: unrecognized type of log operation (%d)",
__func__, ITEM_TYPE(item));
@ -1896,11 +1893,33 @@ xlog_recover_reorder_trans(
*/
if (!list_empty(&sort_list))
list_splice_init(&sort_list, &trans->r_itemq);
error = -EIO;
goto out;
error = -EFSCORRUPTED;
break;
}
if (item->ri_ops->reorder)
fate = item->ri_ops->reorder(item);
switch (fate) {
case XLOG_REORDER_BUFFER_LIST:
list_move_tail(&item->ri_list, &buffer_list);
break;
case XLOG_REORDER_CANCEL_LIST:
trace_xfs_log_recover_item_reorder_head(log,
trans, item, pass);
list_move(&item->ri_list, &cancel_list);
break;
case XLOG_REORDER_INODE_BUFFER_LIST:
list_move(&item->ri_list, &inode_buffer_list);
break;
case XLOG_REORDER_ITEM_LIST:
trace_xfs_log_recover_item_reorder_tail(log,
trans, item, pass);
list_move_tail(&item->ri_list, &item_list);
break;
}
}
out:
ASSERT(list_empty(&sort_list));
if (!list_empty(&buffer_list))
list_splice(&buffer_list, &trans->r_itemq);

9
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_recover.h"
kmem_zone_t *xfs_cui_zone;
kmem_zone_t *xfs_cud_zone;
@ -570,3 +571,11 @@ xfs_cui_recover(
xfs_trans_cancel(tp);
return error;
}
const struct xlog_recover_item_ops xlog_cui_item_ops = {
.item_type = XFS_LI_CUI,
};
const struct xlog_recover_item_ops xlog_cud_item_ops = {
.item_type = XFS_LI_CUD,
};

9
fs/xfs/xfs_rmap_item.c
View File

@ -18,6 +18,7 @@
#include "xfs_log.h"
#include "xfs_rmap.h"
#include "xfs_error.h"
#include "xfs_log_recover.h"
kmem_zone_t *xfs_rui_zone;
kmem_zone_t *xfs_rud_zone;
@ -585,3 +586,11 @@ xfs_rui_recover(
xfs_trans_cancel(tp);
return error;
}
const struct xlog_recover_item_ops xlog_rui_item_ops = {
.item_type = XFS_LI_RUI,
};
const struct xlog_recover_item_ops xlog_rud_item_ops = {
.item_type = XFS_LI_RUD,
};