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-rw-r--r--fs/gfs2/super.c69
1 files changed, 43 insertions, 26 deletions
diff --git a/fs/gfs2/super.c b/fs/gfs2/super.c
index de8afad..1319b5c 100644
--- a/fs/gfs2/super.c
+++ b/fs/gfs2/super.c
@@ -399,7 +399,7 @@ int gfs2_make_fs_rw(struct gfs2_sbd *sdp)
{
struct gfs2_inode *ip = GFS2_I(sdp->sd_jdesc->jd_inode);
struct gfs2_glock *j_gl = ip->i_gl;
- struct gfs2_holder t_gh;
+ struct gfs2_holder thaw_gh;
struct gfs2_log_header_host head;
int error;
@@ -407,7 +407,8 @@ int gfs2_make_fs_rw(struct gfs2_sbd *sdp)
if (error)
return error;
- error = gfs2_glock_nq_init(sdp->sd_trans_gl, LM_ST_SHARED, 0, &t_gh);
+ error = gfs2_glock_nq_init(sdp->sd_freeze_gl, LM_ST_SHARED, 0,
+ &thaw_gh);
if (error)
goto fail_threads;
@@ -433,13 +434,13 @@ int gfs2_make_fs_rw(struct gfs2_sbd *sdp)
set_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags);
- gfs2_glock_dq_uninit(&t_gh);
+ gfs2_glock_dq_uninit(&thaw_gh);
return 0;
fail:
- t_gh.gh_flags |= GL_NOCACHE;
- gfs2_glock_dq_uninit(&t_gh);
+ thaw_gh.gh_flags |= GL_NOCACHE;
+ gfs2_glock_dq_uninit(&thaw_gh);
fail_threads:
kthread_stop(sdp->sd_quotad_process);
kthread_stop(sdp->sd_logd_process);
@@ -635,15 +636,21 @@ struct lfcc {
*/
static int gfs2_lock_fs_check_clean(struct gfs2_sbd *sdp,
- struct gfs2_holder *t_gh)
+ struct gfs2_holder *freeze_gh)
{
struct gfs2_inode *ip;
struct gfs2_jdesc *jd;
struct lfcc *lfcc;
LIST_HEAD(list);
struct gfs2_log_header_host lh;
+ struct gfs2_inode *dip = GFS2_I(sdp->sd_root_dir->d_inode);
int error;
+ error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0,
+ &sdp->sd_freeze_root_gh);
+ if (error)
+ return error;
+ atomic_set(&sdp->sd_frozen_root, 1);
list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) {
lfcc = kmalloc(sizeof(struct lfcc), GFP_KERNEL);
if (!lfcc) {
@@ -659,8 +666,8 @@ static int gfs2_lock_fs_check_clean(struct gfs2_sbd *sdp,
list_add(&lfcc->list, &list);
}
- error = gfs2_glock_nq_init(sdp->sd_trans_gl, LM_ST_DEFERRED,
- GL_NOCACHE, t_gh);
+ error = gfs2_glock_nq_init(sdp->sd_freeze_gl, LM_ST_EXCLUSIVE,
+ GL_NOCACHE, freeze_gh);
list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) {
error = gfs2_jdesc_check(jd);
@@ -676,7 +683,7 @@ static int gfs2_lock_fs_check_clean(struct gfs2_sbd *sdp,
}
if (error)
- gfs2_glock_dq_uninit(t_gh);
+ gfs2_glock_dq_uninit(freeze_gh);
out:
while (!list_empty(&list)) {
@@ -685,6 +692,11 @@ out:
gfs2_glock_dq_uninit(&lfcc->gh);
kfree(lfcc);
}
+ if (error) {
+ atomic_dec(&sdp->sd_frozen_root);
+ wait_event(sdp->sd_frozen_root_wait, atomic_read(&sdp->sd_frozen_root) == 0);
+ gfs2_glock_dq_uninit(&sdp->sd_freeze_root_gh);
+ }
return error;
}
@@ -742,7 +754,7 @@ static int gfs2_write_inode(struct inode *inode, struct writeback_control *wbc)
int ret = 0;
if (wbc->sync_mode == WB_SYNC_ALL)
- gfs2_log_flush(GFS2_SB(inode), ip->i_gl);
+ gfs2_log_flush(GFS2_SB(inode), ip->i_gl, NORMAL_FLUSH);
if (bdi->dirty_exceeded)
gfs2_ail1_flush(sdp, wbc);
else
@@ -822,9 +834,18 @@ out:
static int gfs2_make_fs_ro(struct gfs2_sbd *sdp)
{
- struct gfs2_holder t_gh;
+ struct gfs2_holder thaw_gh;
int error;
+ error = gfs2_glock_nq_init(sdp->sd_freeze_gl, LM_ST_SHARED, GL_NOCACHE,
+ &thaw_gh);
+ if (error && !test_bit(SDF_SHUTDOWN, &sdp->sd_flags))
+ return error;
+
+ down_write(&sdp->sd_log_flush_lock);
+ clear_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags);
+ up_write(&sdp->sd_log_flush_lock);
+
kthread_stop(sdp->sd_quotad_process);
kthread_stop(sdp->sd_logd_process);
@@ -832,18 +853,11 @@ static int gfs2_make_fs_ro(struct gfs2_sbd *sdp)
gfs2_quota_sync(sdp->sd_vfs, 0);
gfs2_statfs_sync(sdp->sd_vfs, 0);
- error = gfs2_glock_nq_init(sdp->sd_trans_gl, LM_ST_SHARED, GL_NOCACHE,
- &t_gh);
- if (error && !test_bit(SDF_SHUTDOWN, &sdp->sd_flags))
- return error;
-
- gfs2_meta_syncfs(sdp);
- gfs2_log_shutdown(sdp);
-
- clear_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags);
+ gfs2_log_flush(sdp, NULL, SHUTDOWN_FLUSH);
+ gfs2_assert_warn(sdp, atomic_read(&sdp->sd_log_blks_free) == sdp->sd_jdesc->jd_blocks);
- if (t_gh.gh_gl)
- gfs2_glock_dq_uninit(&t_gh);
+ if (thaw_gh.gh_gl)
+ gfs2_glock_dq_uninit(&thaw_gh);
gfs2_quota_cleanup(sdp);
@@ -900,7 +914,7 @@ restart:
iput(sdp->sd_quota_inode);
gfs2_glock_put(sdp->sd_rename_gl);
- gfs2_glock_put(sdp->sd_trans_gl);
+ gfs2_glock_put(sdp->sd_freeze_gl);
if (!sdp->sd_args.ar_spectator) {
gfs2_glock_dq_uninit(&sdp->sd_journal_gh);
@@ -935,8 +949,8 @@ static int gfs2_sync_fs(struct super_block *sb, int wait)
struct gfs2_sbd *sdp = sb->s_fs_info;
gfs2_quota_sync(sb, -1);
- if (wait && sdp)
- gfs2_log_flush(sdp, NULL);
+ if (wait && sdp && !atomic_read(&sdp->sd_log_freeze))
+ gfs2_log_flush(sdp, NULL, NORMAL_FLUSH);
return 0;
}
@@ -986,6 +1000,9 @@ static int gfs2_unfreeze(struct super_block *sb)
struct gfs2_sbd *sdp = sb->s_fs_info;
gfs2_glock_dq_uninit(&sdp->sd_freeze_gh);
+ atomic_dec(&sdp->sd_frozen_root);
+ wait_event(sdp->sd_frozen_root_wait, atomic_read(&sdp->sd_frozen_root) == 0);
+ gfs2_glock_dq_uninit(&sdp->sd_freeze_root_gh);
return 0;
}
@@ -1525,7 +1542,7 @@ static void gfs2_evict_inode(struct inode *inode)
goto out_unlock;
out_truncate:
- gfs2_log_flush(sdp, ip->i_gl);
+ gfs2_log_flush(sdp, ip->i_gl, NORMAL_FLUSH);
if (test_bit(GLF_DIRTY, &ip->i_gl->gl_flags)) {
struct address_space *metamapping = gfs2_glock2aspace(ip->i_gl);
filemap_fdatawrite(metamapping);
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