dlm: fix unlock balance warnings
The in_recovery rw_semaphore has always been acquired and
released by different threads by design. To work around
the "BUG: bad unlock balance detected!" messages, adjust
things so the dlm_recoverd thread always does both down_write
and up_write.
Signed-off-by: David Teigland <teigland@redhat.com>
diff --git a/fs/dlm/dlm_internal.h b/fs/dlm/dlm_internal.h
index 9d3e485..871c1ab 100644
--- a/fs/dlm/dlm_internal.h
+++ b/fs/dlm/dlm_internal.h
@@ -604,6 +604,7 @@
struct idr ls_recover_idr;
spinlock_t ls_recover_idr_lock;
wait_queue_head_t ls_wait_general;
+ wait_queue_head_t ls_recover_lock_wait;
struct mutex ls_clear_proc_locks;
struct list_head ls_root_list; /* root resources */
@@ -616,15 +617,40 @@
char ls_name[1];
};
-#define LSFL_WORK 0
-#define LSFL_RUNNING 1
-#define LSFL_RECOVERY_STOP 2
-#define LSFL_RCOM_READY 3
-#define LSFL_RCOM_WAIT 4
-#define LSFL_UEVENT_WAIT 5
-#define LSFL_TIMEWARN 6
-#define LSFL_CB_DELAY 7
-#define LSFL_NODIR 8
+/*
+ * LSFL_RECOVER_STOP - dlm_ls_stop() sets this to tell dlm recovery routines
+ * that they should abort what they're doing so new recovery can be started.
+ *
+ * LSFL_RECOVER_DOWN - dlm_ls_stop() sets this to tell dlm_recoverd that it
+ * should do down_write() on the in_recovery rw_semaphore. (doing down_write
+ * within dlm_ls_stop causes complaints about the lock acquired/released
+ * in different contexts.)
+ *
+ * LSFL_RECOVER_LOCK - dlm_recoverd holds the in_recovery rw_semaphore.
+ * It sets this after it is done with down_write() on the in_recovery
+ * rw_semaphore and clears it after it has released the rw_semaphore.
+ *
+ * LSFL_RECOVER_WORK - dlm_ls_start() sets this to tell dlm_recoverd that it
+ * should begin recovery of the lockspace.
+ *
+ * LSFL_RUNNING - set when normal locking activity is enabled.
+ * dlm_ls_stop() clears this to tell dlm locking routines that they should
+ * quit what they are doing so recovery can run. dlm_recoverd sets
+ * this after recovery is finished.
+ */
+
+#define LSFL_RECOVER_STOP 0
+#define LSFL_RECOVER_DOWN 1
+#define LSFL_RECOVER_LOCK 2
+#define LSFL_RECOVER_WORK 3
+#define LSFL_RUNNING 4
+
+#define LSFL_RCOM_READY 5
+#define LSFL_RCOM_WAIT 6
+#define LSFL_UEVENT_WAIT 7
+#define LSFL_TIMEWARN 8
+#define LSFL_CB_DELAY 9
+#define LSFL_NODIR 10
/* much of this is just saving user space pointers associated with the
lock that we pass back to the user lib with an ast */
@@ -667,7 +693,7 @@
static inline int dlm_recovery_stopped(struct dlm_ls *ls)
{
- return test_bit(LSFL_RECOVERY_STOP, &ls->ls_flags);
+ return test_bit(LSFL_RECOVER_STOP, &ls->ls_flags);
}
static inline int dlm_no_directory(struct dlm_ls *ls)