[PATCH] Force remount read-only of jffs2 when the garbage collector dies
Signed-off-by: Michael Trimarchi <michael@evidence.eu.com>
---
fs/jffs2/background.c | 21 +++++++++++++++++++++
1 files changed, 21 insertions(+), 0 deletions(-)
diff --git a/fs/jffs2/background.c b/fs/jffs2/background.c
index 8adebd3..669b35e 100644
--- a/fs/jffs2/background.c
+++ b/fs/jffs2/background.c
@@ -70,6 +70,7 @@ void jffs2_stop_garbage_collect_thread(struct jffs2_sb_info *c)
static int jffs2_garbage_collect_thread(void *_c)
{
struct jffs2_sb_info *c = _c;
+ struct super_block *sb;
daemonize("jffs2_gcd_mtd%d", c->mtd->index);
allow_signal(SIGKILL);
@@ -145,5 +146,25 @@ static int jffs2_garbage_collect_thread(void *_c)
spin_lock(&c->erase_completion_lock);
c->gc_task = NULL;
spin_unlock(&c->erase_completion_lock);
+
+ sb = c->os_priv;
+ BUG_ON(sb == NULL);
+
+ /* The garbage collect is died. Try to remount the fs
+ * read-only
+ */
+ down_read(&sb->s_umount);
+ if (sb->s_root && sb->s_mtd && !(sb->s_flags & MS_RDONLY)) {
+ /*
+ * ->remount_fs needs lock_kernel().
+ *
+ * What lock protects sb->s_flags??
+ */
+ lock_kernel();
+ do_remount_sb(sb, MS_RDONLY, NULL, 1);
+ unlock_kernel();
+ }
+ drop_super(sb);
+
complete_and_exit(&c->gc_thread_exit, 0);
}
--
1.5.3.6