/*
* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
- * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
+ * Copyright (C) 2004-2007 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
#include <linux/crc32.h>
#include <linux/lm_interface.h>
#include <linux/delay.h>
+#include <linux/kthread.h>
+#include <linux/freezer.h>
#include "gfs2.h"
#include "incore.h"
struct buffer_head *bh;
int retry;
- BUG_ON(!spin_is_locked(&sdp->sd_log_lock));
-
do {
retry = 0;
gfs2_log_unlock(sdp);
}
-int gfs2_ail1_empty(struct gfs2_sbd *sdp, int flags)
+static int gfs2_ail1_empty(struct gfs2_sbd *sdp, int flags)
{
struct gfs2_ail *ai, *s;
int ret;
mutex_lock(&sdp->sd_log_reserve_mutex);
gfs2_log_lock(sdp);
- while(sdp->sd_log_blks_free <= (blks + reserved_blks)) {
+ while(atomic_read(&sdp->sd_log_blks_free) <= (blks + reserved_blks)) {
gfs2_log_unlock(sdp);
gfs2_ail1_empty(sdp, 0);
gfs2_log_flush(sdp, NULL);
gfs2_ail1_start(sdp, 0);
gfs2_log_lock(sdp);
}
- sdp->sd_log_blks_free -= blks;
+ atomic_sub(blks, &sdp->sd_log_blks_free);
gfs2_log_unlock(sdp);
mutex_unlock(&sdp->sd_log_reserve_mutex);
{
gfs2_log_lock(sdp);
- sdp->sd_log_blks_free += blks;
+ atomic_add(blks, &sdp->sd_log_blks_free);
gfs2_assert_withdraw(sdp,
- sdp->sd_log_blks_free <= sdp->sd_jdesc->jd_blocks);
+ atomic_read(&sdp->sd_log_blks_free) <= sdp->sd_jdesc->jd_blocks);
gfs2_log_unlock(sdp);
up_read(&sdp->sd_log_flush_lock);
}
static u64 log_bmap(struct gfs2_sbd *sdp, unsigned int lbn)
{
- struct inode *inode = sdp->sd_jdesc->jd_inode;
- int error;
- struct buffer_head bh_map = { .b_state = 0, .b_blocknr = 0 };
-
- bh_map.b_size = 1 << inode->i_blkbits;
- error = gfs2_block_map(inode, lbn, 0, &bh_map);
- if (error || !bh_map.b_blocknr)
- printk(KERN_INFO "error=%d, dbn=%llu lbn=%u", error,
- (unsigned long long)bh_map.b_blocknr, lbn);
- gfs2_assert_withdraw(sdp, !error && bh_map.b_blocknr);
-
- return bh_map.b_blocknr;
+ struct gfs2_journal_extent *je;
+
+ list_for_each_entry(je, &sdp->sd_jdesc->extent_list, extent_list) {
+ if (lbn >= je->lblock && lbn < je->lblock + je->blocks)
+ return je->dblock + lbn - je->lblock;
+ }
+
+ return -1;
}
/**
ail2_empty(sdp, new_tail);
gfs2_log_lock(sdp);
- sdp->sd_log_blks_free += dist;
- gfs2_assert_withdraw(sdp, sdp->sd_log_blks_free <= sdp->sd_jdesc->jd_blocks);
+ atomic_add(dist, &sdp->sd_log_blks_free);
+ gfs2_assert_withdraw(sdp, atomic_read(&sdp->sd_log_blks_free) <= sdp->sd_jdesc->jd_blocks);
gfs2_log_unlock(sdp);
sdp->sd_log_tail = new_tail;
*
*/
-void gfs2_log_flush(struct gfs2_sbd *sdp, struct gfs2_glock *gl)
+void __gfs2_log_flush(struct gfs2_sbd *sdp, struct gfs2_glock *gl)
{
struct gfs2_ail *ai;
down_write(&sdp->sd_log_flush_lock);
- if (gl) {
- gfs2_log_lock(sdp);
- if (list_empty(&gl->gl_le.le_list)) {
- gfs2_log_unlock(sdp);
- up_write(&sdp->sd_log_flush_lock);
- return;
- }
- gfs2_log_unlock(sdp);
+ /* Log might have been flushed while we waited for the flush lock */
+ if (gl && !test_bit(GLF_LFLUSH, &gl->gl_flags)) {
+ up_write(&sdp->sd_log_flush_lock);
+ return;
}
ai = kzalloc(sizeof(struct gfs2_ail), GFP_NOFS | __GFP_NOFAIL);
log_flush_commit(sdp);
else if (sdp->sd_log_tail != current_tail(sdp) && !sdp->sd_log_idle){
gfs2_log_lock(sdp);
- sdp->sd_log_blks_free--; /* Adjust for unreserved buffer */
+ atomic_dec(&sdp->sd_log_blks_free); /* Adjust for unreserved buffer */
gfs2_log_unlock(sdp);
log_write_header(sdp, 0, PULL);
}
static void log_refund(struct gfs2_sbd *sdp, struct gfs2_trans *tr)
{
unsigned int reserved;
- unsigned int old;
+ unsigned int unused;
gfs2_log_lock(sdp);
sdp->sd_log_commited_revoke += tr->tr_num_revoke - tr->tr_num_revoke_rm;
gfs2_assert_withdraw(sdp, ((int)sdp->sd_log_commited_revoke) >= 0);
reserved = calc_reserved(sdp);
- old = sdp->sd_log_blks_free;
- sdp->sd_log_blks_free += tr->tr_reserved -
- (reserved - sdp->sd_log_blks_reserved);
-
- gfs2_assert_withdraw(sdp, sdp->sd_log_blks_free >= old);
- gfs2_assert_withdraw(sdp, sdp->sd_log_blks_free <=
+ gfs2_assert_withdraw(sdp, sdp->sd_log_blks_reserved + tr->tr_reserved >= reserved);
+ unused = sdp->sd_log_blks_reserved - reserved + tr->tr_reserved;
+ atomic_add(unused, &sdp->sd_log_blks_free);
+ gfs2_assert_withdraw(sdp, atomic_read(&sdp->sd_log_blks_free) <=
sdp->sd_jdesc->jd_blocks);
-
sdp->sd_log_blks_reserved = reserved;
gfs2_log_unlock(sdp);
}
+static void buf_lo_incore_commit(struct gfs2_sbd *sdp, struct gfs2_trans *tr)
+{
+ struct list_head *head = &tr->tr_list_buf;
+ struct gfs2_bufdata *bd;
+
+ gfs2_log_lock(sdp);
+ while (!list_empty(head)) {
+ bd = list_entry(head->next, struct gfs2_bufdata, bd_list_tr);
+ list_del_init(&bd->bd_list_tr);
+ tr->tr_num_buf--;
+ }
+ gfs2_log_unlock(sdp);
+ gfs2_assert_warn(sdp, !tr->tr_num_buf);
+}
+
/**
* gfs2_log_commit - Commit a transaction to the log
* @sdp: the filesystem
void gfs2_log_commit(struct gfs2_sbd *sdp, struct gfs2_trans *tr)
{
log_refund(sdp, tr);
- lops_incore_commit(sdp, tr);
+ buf_lo_incore_commit(sdp, tr);
sdp->sd_vfs->s_dirt = 1;
up_read(&sdp->sd_log_flush_lock);
down_write(&sdp->sd_log_flush_lock);
gfs2_assert_withdraw(sdp, !sdp->sd_log_blks_reserved);
- gfs2_assert_withdraw(sdp, !sdp->sd_log_num_gl);
gfs2_assert_withdraw(sdp, !sdp->sd_log_num_buf);
gfs2_assert_withdraw(sdp, !sdp->sd_log_num_revoke);
gfs2_assert_withdraw(sdp, !sdp->sd_log_num_rg);
log_write_header(sdp, GFS2_LOG_HEAD_UNMOUNT,
(sdp->sd_log_tail == current_tail(sdp)) ? 0 : PULL);
- gfs2_assert_warn(sdp, sdp->sd_log_blks_free == sdp->sd_jdesc->jd_blocks);
+ gfs2_assert_warn(sdp, atomic_read(&sdp->sd_log_blks_free) == sdp->sd_jdesc->jd_blocks);
gfs2_assert_warn(sdp, sdp->sd_log_head == sdp->sd_log_tail);
gfs2_assert_warn(sdp, list_empty(&sdp->sd_ail2_list));
}
}
+
+/**
+ * gfs2_logd - Update log tail as Active Items get flushed to in-place blocks
+ * @sdp: Pointer to GFS2 superblock
+ *
+ * Also, periodically check to make sure that we're using the most recent
+ * journal index.
+ */
+
+int gfs2_logd(void *data)
+{
+ struct gfs2_sbd *sdp = data;
+ unsigned long t;
+ int need_flush;
+
+ while (!kthread_should_stop()) {
+ /* Advance the log tail */
+
+ t = sdp->sd_log_flush_time +
+ gfs2_tune_get(sdp, gt_log_flush_secs) * HZ;
+
+ gfs2_ail1_empty(sdp, DIO_ALL);
+ gfs2_log_lock(sdp);
+ need_flush = sdp->sd_log_num_buf > gfs2_tune_get(sdp, gt_incore_log_blocks);
+ gfs2_log_unlock(sdp);
+ if (need_flush || time_after_eq(jiffies, t)) {
+ gfs2_log_flush(sdp, NULL);
+ sdp->sd_log_flush_time = jiffies;
+ }
+
+ t = gfs2_tune_get(sdp, gt_logd_secs) * HZ;
+ if (freezing(current))
+ refrigerator();
+ schedule_timeout_interruptible(t);
+ }
+
+ return 0;
+}
+
projects / linux-2.6-omap-h63xx.git / blobdiff