[Cluster-devel] [RHEL5 gfs-kmod patch] GFS: Write vfs inode attributes to disk in gfs_inode_write

[Benjamin Marzinski]

GFS wasn't ever updating mtime during mmaps to a file.  This patch makes
gfs_write_inode write the vfs inode attributes out to disk, so that they
get updated when the mmap data is written back to disk.

Signed-off-by: Benjamin Marzinski <bmarzins at redhat.com>
---
diff --git a/gfs-kernel/src/gfs/ops_super.c b/gfs-kernel/src/gfs/ops_super.c
index c111a2e..0d17735 100644
--- a/gfs-kernel/src/gfs/ops_super.c
+++ b/gfs-kernel/src/gfs/ops_super.c
@@ -39,6 +39,7 @@
 #include "super.h"
 #include "sys.h"
 #include "mount.h"
+#include "trans.h"
 
 /**
  * gfs_write_inode - Make sure the inode is stable on the disk
@@ -51,14 +52,50 @@
 static int
 gfs_write_inode(struct inode *inode, int sync)
 {
+	int ret = 0;
 	struct gfs_inode *ip = get_v2ip(inode);
+	struct buffer_head *dibh;
+	struct gfs_holder i_gh;
+	int need_unlock = 0;
+
+	if (!ip)
+		return 0;
 
 	atomic_inc(&ip->i_sbd->sd_ops_super);
 
-	if (ip && sync)
+	if (current->flags & PF_MEMALLOC)
+		goto do_flush;
+
+	if (!gfs_glock_is_locked_by_me(ip->i_gl)) {
+		ret = gfs_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
+		if (ret)
+			goto do_flush;
+		need_unlock = 1;
+	}
+	/* Trans may require:
+	   one dinode block. */
+	ret = gfs_trans_begin(ip->i_sbd, 1, 0);
+	if (ret)
+		goto do_unlock;
+
+	ret = gfs_get_inode_buffer(ip, &dibh);
+	if (ret == 0) {
+		gfs_inode_attr_out(ip);
+		gfs_trans_add_bh(ip->i_gl, dibh);
+		gfs_dinode_out(&ip->i_di, dibh->b_data);
+		brelse(dibh);
+	}
+
+	gfs_trans_end(ip->i_sbd);
+
+do_unlock:
+	if (need_unlock)
+		gfs_glock_dq_uninit(&i_gh);
+do_flush:
+	if (sync)
 		gfs_log_flush_glock(ip->i_gl, 0);
 
-	return 0;
+	return ret;
 }
 
 /**