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gfs2: The freeze glock should never be frozen 

Before this patch, some gfs2 code locked the freeze glock with LM_FLAG_NOEXP
(Do not freeze) flag, and some did not. We never want to freeze the freeze
glock, so this patch makes it consistently use LM_FLAG_NOEXP always.

Signed-off-by: Bob Peterson <rpeterso@redhat.com>
This commit is contained in:
Bob Peterson 2020-06-25 14:42:17 -05:00 committed by Andreas Gruenbacher
parent 623ba664b7
commit c860f8ffbe
2 changed files with 11 additions and 8 deletions
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3
fs/gfs2/ops_fstype.c
View File

@ -1140,7 +1140,8 @@ static int gfs2_fill_super(struct super_block *sb, struct fs_context *fc)
struct gfs2_holder freeze_gh;
error = gfs2_glock_nq_init(sdp->sd_freeze_gl, LM_ST_SHARED,
GL_EXACT, &freeze_gh);
LM_FLAG_NOEXP | GL_EXACT,
&freeze_gh);
if (error) {
fs_err(sdp, "can't make FS RO: %d\n", error);
goto fail_per_node;

16
fs/gfs2/super.c
View File

@ -167,7 +167,8 @@ int gfs2_make_fs_rw(struct gfs2_sbd *sdp)
if (error)
return error;
error = gfs2_glock_nq_init(sdp->sd_freeze_gl, LM_ST_SHARED, GL_EXACT,
error = gfs2_glock_nq_init(sdp->sd_freeze_gl, LM_ST_SHARED,
LM_FLAG_NOEXP | GL_EXACT,
&freeze_gh);
if (error)
goto fail_threads;
@ -429,7 +430,7 @@ static int gfs2_lock_fs_check_clean(struct gfs2_sbd *sdp)
}
error = gfs2_glock_nq_init(sdp->sd_freeze_gl, LM_ST_EXCLUSIVE,
0, &sdp->sd_freeze_gh);
LM_FLAG_NOEXP, &sdp->sd_freeze_gh);
if (error)
goto out;
@ -612,14 +613,15 @@ int gfs2_make_fs_ro(struct gfs2_sbd *sdp)
!gfs2_glock_is_locked_by_me(sdp->sd_freeze_gl)) {
if (!log_write_allowed) {
error = gfs2_glock_nq_init(sdp->sd_freeze_gl,
LM_ST_SHARED,
LM_FLAG_TRY | GL_EXACT,
LM_ST_SHARED, LM_FLAG_TRY |
LM_FLAG_NOEXP | GL_EXACT,
&freeze_gh);
if (error == GLR_TRYFAILED)
error = 0;
} else {
error = gfs2_glock_nq_init(sdp->sd_freeze_gl,
LM_ST_SHARED, GL_EXACT,
LM_ST_SHARED,
LM_FLAG_NOEXP | GL_EXACT,
&freeze_gh);
if (error && !gfs2_withdrawn(sdp))
return error;
@ -761,8 +763,8 @@ void gfs2_freeze_func(struct work_struct *work)
struct super_block *sb = sdp->sd_vfs;
atomic_inc(&sb->s_active);
error = gfs2_glock_nq_init(sdp->sd_freeze_gl, LM_ST_SHARED, GL_EXACT,
&freeze_gh);
error = gfs2_glock_nq_init(sdp->sd_freeze_gl, LM_ST_SHARED,
LM_FLAG_NOEXP | GL_EXACT, &freeze_gh);
if (error) {
fs_info(sdp, "GFS2: couldn't get freeze lock : %d\n", error);
gfs2_assert_withdraw(sdp, 0);