1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
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37 #define DEBUG_SUBSYSTEM S_LDLM
39 #include <libcfs/libcfs.h>
41 #include <liblustre.h>
44 #include <lustre_dlm.h>
45 #include <lustre_lib.h>
48 * ldlm locking uses resource to serialize access to locks
49 * but there is a case when we change resource of lock upon
50 * enqueue reply. we rely on that lock->l_resource = new_res
53 struct ldlm_resource * lock_res_and_lock(struct ldlm_lock *lock)
55 struct ldlm_resource *res = NULL;
57 cfs_spin_lock(&lock->l_lock);
58 res = lock->l_resource;
60 if (ns_is_server(res->lr_namespace))
61 /* on server-side resource of lock doesn't change */
62 cfs_spin_unlock(&lock->l_lock);
68 void unlock_res_and_lock(struct ldlm_lock *lock)
70 struct ldlm_resource *res = lock->l_resource;
72 if (ns_is_server(res->lr_namespace)) {
73 /* on server-side resource of lock doesn't change */
79 cfs_spin_unlock(&lock->l_lock);