gfs2: Convert to new freezing mechanism

We update gfs2_page_mkwrite() to use new freeze protection and the transaction
code to use freeze protection while the transaction is running. That is needed
to stop iput() of unlinked file from modifying the filesystem. The rest is
handled by the generic code.

CC: cluster-devel@redhat.com
CC: Steven Whitehouse <swhiteho@redhat.com>
Acked-by: Steven Whitehouse <swhiteho@redhat.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

1 files changed, 4 insertions, 0 deletions

diff --git a/fs/gfs2/trans.c b/fs/gfs2/trans.c
index ad3e2fb763d7..adbd27875ef9 100644
--- a/fs/gfs2/trans.c
+++ b/fs/gfs2/trans.c
@@ -50,6 +50,7 @@ int gfs2_trans_begin(struct gfs2_sbd *sdp, unsigned int blocks,
         if (revokes)
                 tr->tr_reserved += gfs2_struct2blk(sdp, revokes,
                                                    sizeof(u64));
+        sb_start_intwrite(sdp->sd_vfs);
         gfs2_holder_init(sdp->sd_trans_gl, LM_ST_SHARED, 0, &tr->tr_t_gh);
 
         error = gfs2_glock_nq(&tr->tr_t_gh);
@@ -68,6 +69,7 @@ fail_gunlock:
         gfs2_glock_dq(&tr->tr_t_gh);
 
 fail_holder_uninit:
+        sb_end_intwrite(sdp->sd_vfs);
         gfs2_holder_uninit(&tr->tr_t_gh);
         kfree(tr);
 
@@ -116,6 +118,7 @@ void gfs2_trans_end(struct gfs2_sbd *sdp)
                         gfs2_holder_uninit(&tr->tr_t_gh);
                         kfree(tr);
                 }
+                sb_end_intwrite(sdp->sd_vfs);
                 return;
         }
 
@@ -136,6 +139,7 @@ void gfs2_trans_end(struct gfs2_sbd *sdp)
 
         if (sdp->sd_vfs->s_flags & MS_SYNCHRONOUS)
                 gfs2_log_flush(sdp, NULL);
+        sb_end_intwrite(sdp->sd_vfs);
 }
 
 /**