LU-6271 osc: handle osc eviction correctly

[fs/lustre-release.git] / lustre / osc / osc_object.c

diff --git a/lustre/osc/osc_object.c b/lustre/osc/osc_object.c
index 00d19e7..16bb564 100644 (file)
--- a/lustre/osc/osc_object.c
+++ b/lustre/osc/osc_object.c
@@ -97,6 +97,9 @@ static int osc_object_init(const struct lu_env *env, struct lu_object *obj,
        spin_lock_init(&osc->oo_ol_spin);
        INIT_LIST_HEAD(&osc->oo_ol_list);
 
+       atomic_set(&osc->oo_nr_ios, 0);
+       init_waitqueue_head(&osc->oo_io_waitq);
+
        cl_object_page_init(lu2cl(obj), sizeof(struct osc_page));
 
        return 0;
@@ -119,6 +122,7 @@ static void osc_object_free(const struct lu_env *env, struct lu_object *obj)
        LASSERT(atomic_read(&osc->oo_nr_reads) == 0);
        LASSERT(atomic_read(&osc->oo_nr_writes) == 0);
        LASSERT(list_empty(&osc->oo_ol_list));
+       LASSERT(atomic_read(&osc->oo_nr_ios) == 0);
 
        lu_object_fini(obj);
        OBD_SLAB_FREE_PTR(osc, osc_object_kmem);
@@ -251,15 +255,15 @@ static int osc_object_fiemap(const struct lu_env *env, struct cl_object *obj,
                             struct ll_fiemap_info_key *fmkey,
                             struct fiemap *fiemap, size_t *buflen)
 {
-       struct obd_export               *exp = osc_export(cl2osc(obj));
-       struct ldlm_res_id              resid;
-       ldlm_policy_data_t              policy;
-       struct lustre_handle            lockh;
-       ldlm_mode_t                     mode = 0;
-       struct ptlrpc_request           *req;
-       struct fiemap                   *reply;
-       char                            *tmp;
-       int                             rc;
+       struct obd_export *exp = osc_export(cl2osc(obj));
+       struct ldlm_res_id resid;
+       union ldlm_policy_data policy;
+       struct lustre_handle lockh;
+       enum ldlm_mode mode = LCK_MINMODE;
+       struct ptlrpc_request *req;
+       struct fiemap *reply;
+       char *tmp;
+       int rc;
        ENTRY;
 
        fmkey->lfik_oa.o_oi = cl2osc(obj)->oo_oinfo->loi_oi;
@@ -408,4 +412,20 @@ struct lu_object *osc_object_alloc(const struct lu_env *env,
        return obj;
 }
 
+int osc_object_invalidate(const struct lu_env *env, struct osc_object *osc)
+{
+       struct l_wait_info lwi = { 0 };
+       ENTRY;
+
+       CDEBUG(D_INODE, "Invalidate osc object: %p, # of active IOs: %d\n",
+              osc, atomic_read(&osc->oo_nr_ios));
+
+       l_wait_event(osc->oo_io_waitq, atomic_read(&osc->oo_nr_ios) == 0, &lwi);
+
+       /* Discard all pages of this object. */
+       osc_cache_truncate_start(env, osc, 0, NULL);
+
+       RETURN(0);
+}
+
 /** @} osc */