b=2766

[fs/lustre-release.git] / lustre / ldlm / l_lock.c

diff --git a/lustre/ldlm/l_lock.c b/lustre/ldlm/l_lock.c
index 680d4f0..d1f8c56 100644 (file)
--- a/lustre/ldlm/l_lock.c
+++ b/lustre/ldlm/l_lock.c
@@ -20,6 +20,8 @@
  *
  */
 
+#define DEBUG_SUBSYSTEM S_LDLM
+#ifdef __KERNEL__
 #include <linux/config.h>
 #include <linux/kernel.h>
 #include <linux/mm.h>
@@ -39,10 +41,11 @@
 #include <linux/mm.h>
 #include <linux/pagemap.h>
 #include <linux/smp_lock.h>
+#else 
+#include <liblustre.h>
+#endif
 
-#define DEBUG_SUBSYSTEM S_LDLM
-
-#include <linux/obd_class.h>
+#include <linux/lustre_dlm.h>
 #include <linux/lustre_lib.h>
 
 /* invariants:
@@ -65,6 +68,10 @@ void l_lock(struct lustre_lock *lock)
                 owner = 1;
         spin_unlock(&lock->l_spin);
 
+        /* This is safe to increment outside the spinlock because we
+         * can only have 1 CPU running on the current task
+         * (i.e. l_owner == current), regardless of the number of CPUs.
+         */
         if (owner) {
                 ++lock->l_depth;
         } else {
@@ -106,3 +113,26 @@ int l_has_lock(struct lustre_lock *lock)
                 CDEBUG(D_INFO, "lock_depth: %d\n", depth);
         return owner;
 }
+
+#ifdef __KERNEL__
+#include <linux/lustre_version.h>
+void l_check_no_ns_lock(struct ldlm_namespace *ns)
+{
+        static unsigned long next_msg;
+
+        if (l_has_lock(&ns->ns_lock) && time_after(jiffies, next_msg)) {
+                CERROR("namespace %s lock held illegally; tell phil\n",
+                       ns->ns_name);
+#if (LUSTRE_KERNEL_VERSION >= 30)
+                CERROR(portals_debug_dumpstack());
+#endif
+                next_msg = jiffies + 60 * HZ;
+        }
+}
+
+#else
+void l_check_no_ns_lock(struct ldlm_namespace *ns)
+{
+#warning "FIXME: check lock in user space??"
+}
+#endif /* __KERNEL__ */