mirror of
https://github.com/torvalds/linux.git
synced 2024-09-21 15:33:19 +00:00
588bff95c9
Before this patch, there was a lot of code redundancy between functions log_write_header (which uses bio) and clean_journal (which uses buffer_head). This patch reduces the redundancy to simplify the code and make log header writing more consistent. We want more consistency and reduced redundancy because we plan to add a bunch of new fields to improve performance (by eliminating the local statfs and quota files) improve metadata integrity (by adding new crcs and such) and for better debugging (by adding new fields to track when and where metadata was pushed through the journals.) We don't want to duplicate setting these new fields, nor allow for human error in the process. This reduction in code redundancy is accomplished by introducing a new helper function, gfs2_write_log_header which uses bio rather than bh. That simplifies recovery function clean_journal() to use the new helper function and iomap rather than redundancy and block_map (and eventually we can maybe remove block_map). It also reduces our dependency on buffer_heads. Signed-off-by: Bob Peterson <rpeterso@redhat.com>
88 lines
2.5 KiB
C
88 lines
2.5 KiB
C
/*
|
|
* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
|
|
* Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
|
|
*
|
|
* This copyrighted material is made available to anyone wishing to use,
|
|
* modify, copy, or redistribute it subject to the terms and conditions
|
|
* of the GNU General Public License version 2.
|
|
*/
|
|
|
|
#ifndef __LOG_DOT_H__
|
|
#define __LOG_DOT_H__
|
|
|
|
#include <linux/list.h>
|
|
#include <linux/spinlock.h>
|
|
#include <linux/writeback.h>
|
|
#include "incore.h"
|
|
|
|
/**
|
|
* gfs2_log_lock - acquire the right to mess with the log manager
|
|
* @sdp: the filesystem
|
|
*
|
|
*/
|
|
|
|
static inline void gfs2_log_lock(struct gfs2_sbd *sdp)
|
|
__acquires(&sdp->sd_log_lock)
|
|
{
|
|
spin_lock(&sdp->sd_log_lock);
|
|
}
|
|
|
|
/**
|
|
* gfs2_log_unlock - release the right to mess with the log manager
|
|
* @sdp: the filesystem
|
|
*
|
|
*/
|
|
|
|
static inline void gfs2_log_unlock(struct gfs2_sbd *sdp)
|
|
__releases(&sdp->sd_log_lock)
|
|
{
|
|
spin_unlock(&sdp->sd_log_lock);
|
|
}
|
|
|
|
static inline void gfs2_log_pointers_init(struct gfs2_sbd *sdp,
|
|
unsigned int value)
|
|
{
|
|
if (++value == sdp->sd_jdesc->jd_blocks) {
|
|
value = 0;
|
|
}
|
|
sdp->sd_log_head = sdp->sd_log_tail = value;
|
|
}
|
|
|
|
static inline void gfs2_ordered_add_inode(struct gfs2_inode *ip)
|
|
{
|
|
struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
|
|
|
|
if (!test_bit(GIF_ORDERED, &ip->i_flags)) {
|
|
spin_lock(&sdp->sd_ordered_lock);
|
|
if (!test_and_set_bit(GIF_ORDERED, &ip->i_flags))
|
|
list_add(&ip->i_ordered, &sdp->sd_log_le_ordered);
|
|
spin_unlock(&sdp->sd_ordered_lock);
|
|
}
|
|
}
|
|
extern void gfs2_ordered_del_inode(struct gfs2_inode *ip);
|
|
extern unsigned int gfs2_struct2blk(struct gfs2_sbd *sdp, unsigned int nstruct,
|
|
unsigned int ssize);
|
|
|
|
extern void gfs2_log_release(struct gfs2_sbd *sdp, unsigned int blks);
|
|
extern int gfs2_log_reserve(struct gfs2_sbd *sdp, unsigned int blks);
|
|
enum gfs2_flush_type {
|
|
NORMAL_FLUSH = 0,
|
|
SYNC_FLUSH,
|
|
SHUTDOWN_FLUSH,
|
|
FREEZE_FLUSH
|
|
};
|
|
extern void gfs2_write_log_header(struct gfs2_sbd *sdp, u64 seq, u32 tail,
|
|
u32 flags, int op_flags);
|
|
extern void gfs2_log_flush(struct gfs2_sbd *sdp, struct gfs2_glock *gl,
|
|
enum gfs2_flush_type type);
|
|
extern void gfs2_log_commit(struct gfs2_sbd *sdp, struct gfs2_trans *trans);
|
|
extern void gfs2_remove_from_ail(struct gfs2_bufdata *bd);
|
|
extern void gfs2_ail1_flush(struct gfs2_sbd *sdp, struct writeback_control *wbc);
|
|
|
|
extern void gfs2_log_shutdown(struct gfs2_sbd *sdp);
|
|
extern int gfs2_logd(void *data);
|
|
extern void gfs2_add_revoke(struct gfs2_sbd *sdp, struct gfs2_bufdata *bd);
|
|
extern void gfs2_write_revokes(struct gfs2_sbd *sdp);
|
|
|
|
#endif /* __LOG_DOT_H__ */
|