LU-14702 osc: cleanup comment in osc_object_is_contended

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

diff --git a/lustre/osc/osc_object.c b/lustre/osc/osc_object.c
index 4f4e8ac..16eab5f 100644 (file)
--- a/lustre/osc/osc_object.c
+++ b/lustre/osc/osc_object.c
@@ -23,11 +23,10 @@
  * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
  * Use is subject to license terms.
  *
- * Copyright (c) 2011, 2015, Intel Corporation.
+ * Copyright (c) 2011, 2017, Intel Corporation.
  */
 /*
  * This file is part of Lustre, http://www.lustre.org/
- * Lustre is a trademark of Sun Microsystems, Inc.
  *
  * Implementation of cl_object for OSC layer.
  *
@@ -118,6 +117,7 @@ void osc_object_free(const struct lu_env *env, struct lu_object *obj)
        LASSERT(atomic_read(&osc->oo_nr_ios) == 0);
 
        lu_object_fini(obj);
+       /* osc doen't contain an lu_object_header, so we don't need call_rcu */
        OBD_SLAB_FREE_PTR(osc, osc_object_kmem);
 }
 EXPORT_SYMBOL(osc_object_free);
@@ -200,10 +200,37 @@ EXPORT_SYMBOL(osc_object_glimpse);
 
 static int osc_object_ast_clear(struct ldlm_lock *lock, void *data)
 {
+       struct osc_object *osc = (struct osc_object *)data;
+       struct ost_lvb *lvb = lock->l_lvb_data;
+       struct lov_oinfo *oinfo;
        ENTRY;
 
-       if (lock->l_ast_data == data)
+       if (lock->l_ast_data == data) {
                lock->l_ast_data = NULL;
+
+               LASSERT(osc != NULL);
+               LASSERT(osc->oo_oinfo != NULL);
+               LASSERT(lvb != NULL);
+
+               /* Updates lvb in lock by the cached oinfo */
+               oinfo = osc->oo_oinfo;
+
+               LDLM_DEBUG(lock, "update lock size %llu blocks %llu [cma]time: "
+                          "%llu %llu %llu by oinfo size %llu blocks %llu "
+                          "[cma]time %llu %llu %llu", lvb->lvb_size,
+                          lvb->lvb_blocks, lvb->lvb_ctime, lvb->lvb_mtime,
+                          lvb->lvb_atime, oinfo->loi_lvb.lvb_size,
+                          oinfo->loi_lvb.lvb_blocks, oinfo->loi_lvb.lvb_ctime,
+                          oinfo->loi_lvb.lvb_mtime, oinfo->loi_lvb.lvb_atime);
+               LASSERTF(oinfo->loi_lvb.lvb_size >= oinfo->loi_kms,
+                        "lvb_size %#llx, loi_kms %#llx\n",
+                        oinfo->loi_lvb.lvb_size, oinfo->loi_kms);
+
+               cl_object_attr_lock(&osc->oo_cl);
+               memcpy(lvb, &oinfo->loi_lvb, sizeof(oinfo->loi_lvb));
+               cl_object_attr_unlock(&osc->oo_cl);
+               ldlm_clear_lvb_cached(lock);
+       }
        RETURN(LDLM_ITER_CONTINUE);
 }
 
@@ -254,7 +281,7 @@ static int osc_object_fiemap(const struct lu_env *env, struct cl_object *obj,
        mode = ldlm_lock_match(exp->exp_obd->obd_namespace,
                               LDLM_FL_BLOCK_GRANTED | LDLM_FL_LVB_READY,
                               &resid, LDLM_EXTENT, &policy,
-                              LCK_PR | LCK_PW, &lockh, 0);
+                              LCK_PR | LCK_PW, &lockh);
        if (mode) { /* lock is cached on client */
                if (mode != LCK_PR) {
                        ldlm_lock_addref(&lockh, LCK_PR);
@@ -308,10 +335,9 @@ drop_lock:
 
 int osc_object_is_contended(struct osc_object *obj)
 {
-        struct osc_device *dev  = lu2osc_dev(obj->oo_cl.co_lu.lo_dev);
-        int osc_contention_time = dev->od_contention_time;
-        cfs_time_t cur_time     = cfs_time_current();
-        cfs_time_t retry_time;
+       struct osc_device *dev = lu2osc_dev(obj->oo_cl.co_lu.lo_dev);
+       time64_t osc_contention_time = dev->od_contention_time;
+       ktime_t retry_time;
 
         if (OBD_FAIL_CHECK(OBD_FAIL_OSC_OBJECT_CONTENTION))
                 return 1;
@@ -319,17 +345,13 @@ int osc_object_is_contended(struct osc_object *obj)
         if (!obj->oo_contended)
                 return 0;
 
-        /*
-         * I like copy-paste. the code is copied from
-         * ll_file_is_contended.
-         */
-        retry_time = cfs_time_add(obj->oo_contention_time,
-                                  cfs_time_seconds(osc_contention_time));
-        if (cfs_time_after(cur_time, retry_time)) {
-                osc_object_clear_contended(obj);
-                return 0;
-        }
-        return 1;
+       retry_time = ktime_add_ns(obj->oo_contention_time,
+                                 osc_contention_time * NSEC_PER_SEC);
+       if (ktime_after(ktime_get(), retry_time)) {
+               osc_object_clear_contended(obj);
+               return 0;
+       }
+       return 1;
 }
 EXPORT_SYMBOL(osc_object_is_contended);
 
@@ -354,7 +376,12 @@ static void osc_req_attr_set(const struct lu_env *env, struct cl_object *obj,
                oa->o_mtime = lvb->lvb_mtime;
                oa->o_valid |= OBD_MD_FLMTIME;
        }
-       if ((flags & OBD_MD_FLATIME) != 0) {
+       /* XXX:
+        * I don't understand this part, what for OSC resets atime just
+        * set by VVP layer to 0 so that OST gets 0 instead of actual
+        * atime, bzzz. please inspect this place with extra care.
+        */
+       if ((flags & OBD_MD_FLATIME) && lvb->lvb_atime > oa->o_atime) {
                oa->o_atime = lvb->lvb_atime;
                oa->o_valid |= OBD_MD_FLATIME;
        }
@@ -452,13 +479,12 @@ struct lu_object *osc_object_alloc(const struct lu_env *env,
 
 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);
+       wait_event_idle(osc->oo_io_waitq, atomic_read(&osc->oo_nr_ios) == 0);
 
        /* Discard all dirty pages of this object. */
        osc_cache_truncate_start(env, osc, 0, NULL);
@@ -467,7 +493,7 @@ int osc_object_invalidate(const struct lu_env *env, struct osc_object *osc)
        osc_lock_discard_pages(env, osc, 0, CL_PAGE_EOF, true);
 
        /* Clear ast data of dlm lock. Do this after discarding all pages */
-       osc_object_prune(env, osc2cl(osc));
+       cl_object_prune(env, osc2cl(osc));
 
        RETURN(0);
 }