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LU-3963 obdclass: convert to linux list api
[fs/lustre-release.git] / lustre / obdclass / cl_object.c
index 57bb6cd..357e73f 100644 (file)
@@ -84,7 +84,7 @@ int cl_object_header_init(struct cl_object_header *h)
                spin_lock_init(&h->coh_attr_guard);
                lockdep_set_class(&h->coh_lock_guard, &cl_lock_guard_class);
                lockdep_set_class(&h->coh_attr_guard, &cl_attr_guard_class);
-               CFS_INIT_LIST_HEAD(&h->coh_locks);
+               INIT_LIST_HEAD(&h->coh_locks);
                h->coh_page_bufsize = 0;
        }
        RETURN(result);
@@ -96,7 +96,7 @@ EXPORT_SYMBOL(cl_object_header_init);
  */
 void cl_object_header_fini(struct cl_object_header *h)
 {
-        LASSERT(cfs_list_empty(&h->coh_locks));
+       LASSERT(list_empty(&h->coh_locks));
         lu_object_header_fini(&h->coh_lu);
 }
 EXPORT_SYMBOL(cl_object_header_fini);
@@ -214,12 +214,12 @@ int cl_object_attr_get(const struct lu_env *env, struct cl_object *obj,
        struct lu_object_header *top;
        int result;
 
-       LASSERT(spin_is_locked(cl_object_attr_guard(obj)));
+       assert_spin_locked(cl_object_attr_guard(obj));
        ENTRY;
 
         top = obj->co_lu.lo_header;
         result = 0;
-        cfs_list_for_each_entry(obj, &top->loh_layers, co_lu.lo_linkage) {
+       list_for_each_entry(obj, &top->loh_layers, co_lu.lo_linkage) {
                 if (obj->co_ops->coo_attr_get != NULL) {
                         result = obj->co_ops->coo_attr_get(env, obj, attr);
                         if (result != 0) {
@@ -246,23 +246,22 @@ int cl_object_attr_set(const struct lu_env *env, struct cl_object *obj,
        struct lu_object_header *top;
        int result;
 
-       LASSERT(spin_is_locked(cl_object_attr_guard(obj)));
+       assert_spin_locked(cl_object_attr_guard(obj));
        ENTRY;
 
-        top = obj->co_lu.lo_header;
-        result = 0;
-        cfs_list_for_each_entry_reverse(obj, &top->loh_layers,
-                                        co_lu.lo_linkage) {
-                if (obj->co_ops->coo_attr_set != NULL) {
-                        result = obj->co_ops->coo_attr_set(env, obj, attr, v);
-                        if (result != 0) {
-                                if (result > 0)
-                                        result = 0;
-                                break;
-                        }
-                }
-        }
-        RETURN(result);
+       top = obj->co_lu.lo_header;
+       result = 0;
+       list_for_each_entry_reverse(obj, &top->loh_layers, co_lu.lo_linkage) {
+               if (obj->co_ops->coo_attr_set != NULL) {
+                       result = obj->co_ops->coo_attr_set(env, obj, attr, v);
+                       if (result != 0) {
+                               if (result > 0)
+                                       result = 0;
+                               break;
+                       }
+               }
+       }
+       RETURN(result);
 }
 EXPORT_SYMBOL(cl_object_attr_set);
 
@@ -283,8 +282,7 @@ int cl_object_glimpse(const struct lu_env *env, struct cl_object *obj,
         ENTRY;
         top = obj->co_lu.lo_header;
         result = 0;
-        cfs_list_for_each_entry_reverse(obj, &top->loh_layers,
-                                        co_lu.lo_linkage) {
+       list_for_each_entry_reverse(obj, &top->loh_layers, co_lu.lo_linkage) {
                 if (obj->co_ops->coo_glimpse != NULL) {
                         result = obj->co_ops->coo_glimpse(env, obj, lvb);
                         if (result != 0)
@@ -312,7 +310,7 @@ int cl_conf_set(const struct lu_env *env, struct cl_object *obj,
         ENTRY;
         top = obj->co_lu.lo_header;
         result = 0;
-        cfs_list_for_each_entry(obj, &top->loh_layers, co_lu.lo_linkage) {
+       list_for_each_entry(obj, &top->loh_layers, co_lu.lo_linkage) {
                 if (obj->co_ops->coo_conf_set != NULL) {
                         result = obj->co_ops->coo_conf_set(env, obj, conf);
                         if (result != 0)
@@ -335,7 +333,7 @@ void cl_object_prune(const struct lu_env *env, struct cl_object *obj)
 
        top = obj->co_lu.lo_header;
        result = 0;
-       cfs_list_for_each_entry(o, &top->loh_layers, co_lu.lo_linkage) {
+       list_for_each_entry(o, &top->loh_layers, co_lu.lo_linkage) {
                if (o->co_ops->coo_prune != NULL) {
                        result = o->co_ops->coo_prune(env, o);
                        if (result != 0)
@@ -384,7 +382,7 @@ int cl_object_has_locks(struct cl_object *obj)
        int has;
 
        spin_lock(&head->coh_lock_guard);
-       has = cfs_list_empty(&head->coh_locks);
+       has = list_empty(&head->coh_locks);
        spin_unlock(&head->coh_lock_guard);
 
        return (has == 0);
@@ -400,11 +398,10 @@ void cache_stats_init(struct cache_stats *cs, const char *name)
                atomic_set(&cs->cs_stats[i], 0);
 }
 
-int cache_stats_print(const struct cache_stats *cs,
-                      char *page, int count, int h)
+int cache_stats_print(const struct cache_stats *cs, struct seq_file *m, int h)
 {
-       int nob = 0;
        int i;
+
        /*
         *   lookup    hit    total  cached create
         * env: ...... ...... ...... ...... ......
@@ -412,18 +409,16 @@ int cache_stats_print(const struct cache_stats *cs,
        if (h) {
                const char *names[CS_NR] = CS_NAMES;
 
-               nob += snprintf(page + nob, count - nob, "%6s", " ");
+               seq_printf(m, "%6s", " ");
                for (i = 0; i < CS_NR; i++)
-                       nob += snprintf(page + nob, count - nob,
-                                       "%8s", names[i]);
-               nob += snprintf(page + nob, count - nob, "\n");
+                       seq_printf(m, "%8s", names[i]);
+               seq_printf(m, "\n");
        }
 
-       nob += snprintf(page + nob, count - nob, "%5.5s:", cs->cs_name);
+       seq_printf(m, "%5.5s:", cs->cs_name);
        for (i = 0; i < CS_NR; i++)
-               nob += snprintf(page + nob, count - nob, "%8u",
-                               atomic_read(&cs->cs_stats[i]));
-       return nob;
+               seq_printf(m, "%8u", atomic_read(&cs->cs_stats[i]));
+       return 0;
 }
 
 static void cl_env_percpu_refill(void);
@@ -471,50 +466,48 @@ static struct cache_stats cl_env_stats = {
  * Outputs client site statistical counters into a buffer. Suitable for
  * ll_rd_*()-style functions.
  */
-int cl_site_stats_print(const struct cl_site *site, char *page, int count)
-{
-        int nob;
-        int i;
-        static const char *pstate[] = {
-                [CPS_CACHED]  = "c",
-                [CPS_OWNED]   = "o",
-                [CPS_PAGEOUT] = "w",
-                [CPS_PAGEIN]  = "r",
-                [CPS_FREEING] = "f"
-        };
-        static const char *lstate[] = {
-                [CLS_NEW]       = "n",
-                [CLS_QUEUING]   = "q",
-                [CLS_ENQUEUED]  = "e",
-                [CLS_HELD]      = "h",
-                [CLS_INTRANSIT] = "t",
-                [CLS_CACHED]    = "c",
-                [CLS_FREEING]   = "f"
-        };
+int cl_site_stats_print(const struct cl_site *site, struct seq_file *m)
+{
+       static const char *pstate[] = {
+               [CPS_CACHED]    = "c",
+               [CPS_OWNED]     = "o",
+               [CPS_PAGEOUT]   = "w",
+               [CPS_PAGEIN]    = "r",
+               [CPS_FREEING]   = "f"
+       };
+       static const char *lstate[] = {
+               [CLS_NEW]       = "n",
+               [CLS_QUEUING]   = "q",
+               [CLS_ENQUEUED]  = "e",
+               [CLS_HELD]      = "h",
+               [CLS_INTRANSIT] = "t",
+               [CLS_CACHED]    = "c",
+               [CLS_FREEING]   = "f"
+       };
+       int i;
+
 /*
        lookup    hit  total   busy create
 pages: ...... ...... ...... ...... ...... [...... ...... ...... ......]
 locks: ...... ...... ...... ...... ...... [...... ...... ...... ...... ......]
   env: ...... ...... ...... ...... ......
  */
-        nob = lu_site_stats_print(&site->cs_lu, page, count);
-        nob += cache_stats_print(&site->cs_pages, page + nob, count - nob, 1);
-        nob += snprintf(page + nob, count - nob, " [");
-        for (i = 0; i < ARRAY_SIZE(site->cs_pages_state); ++i)
-                nob += snprintf(page + nob, count - nob, "%s: %u ",
-                                pstate[i],
-                               atomic_read(&site->cs_pages_state[i]));
-        nob += snprintf(page + nob, count - nob, "]\n");
-        nob += cache_stats_print(&site->cs_locks, page + nob, count - nob, 0);
-        nob += snprintf(page + nob, count - nob, " [");
-        for (i = 0; i < ARRAY_SIZE(site->cs_locks_state); ++i)
-                nob += snprintf(page + nob, count - nob, "%s: %u ",
-                                lstate[i],
-                               atomic_read(&site->cs_locks_state[i]));
-        nob += snprintf(page + nob, count - nob, "]\n");
-        nob += cache_stats_print(&cl_env_stats, page + nob, count - nob, 0);
-        nob += snprintf(page + nob, count - nob, "\n");
-        return nob;
+       lu_site_stats_seq_print(&site->cs_lu, m);
+       cache_stats_print(&site->cs_pages, m, 1);
+       seq_printf(m, " [");
+       for (i = 0; i < ARRAY_SIZE(site->cs_pages_state); ++i)
+               seq_printf(m, "%s: %u ", pstate[i],
+                          atomic_read(&site->cs_pages_state[i]));
+       seq_printf(m, "]\n");
+       cache_stats_print(&site->cs_locks, m, 0);
+       seq_printf(m, " [");
+       for (i = 0; i < ARRAY_SIZE(site->cs_locks_state); ++i)
+               seq_printf(m, "%s: %u ", lstate[i],
+                          atomic_read(&site->cs_locks_state[i]));
+       seq_printf(m, "]\n");
+       cache_stats_print(&cl_env_stats, m, 0);
+       seq_printf(m, "\n");
+       return 0;
 }
 EXPORT_SYMBOL(cl_site_stats_print);
 
@@ -542,7 +535,7 @@ EXPORT_SYMBOL(cl_site_stats_print);
  * bz20044, bz22683.
  */
 
-static CFS_LIST_HEAD(cl_envs);
+static struct list_head cl_envs;
 static unsigned cl_envs_cached_nr  = 0;
 static unsigned cl_envs_cached_max = 128; /* XXX: prototype: arbitrary limit
                                            * for now. */
@@ -560,7 +553,7 @@ struct cl_env {
          * This allows cl_env to be entered into cl_env_hash which implements
          * the current thread -> client environment lookup.
          */
-        cfs_hlist_node_t  ce_node;
+       struct hlist_node  ce_node;
 #endif
        /**
         * Owner for the current cl_env.
@@ -579,7 +572,7 @@ struct cl_env {
          * Linkage into global list of all client environments. Used for
          * garbage collection.
          */
-        cfs_list_t        ce_linkage;
+       struct list_head  ce_linkage;
         /*
          *
          */
@@ -632,14 +625,15 @@ static unsigned cl_env_hops_hash(cfs_hash_t *lh,
 #endif
 }
 
-static void *cl_env_hops_obj(cfs_hlist_node_t *hn)
+static void *cl_env_hops_obj(struct hlist_node *hn)
 {
-        struct cl_env *cle = cfs_hlist_entry(hn, struct cl_env, ce_node);
-        LASSERT(cle->ce_magic == &cl_env_init0);
-        return (void *)cle;
+       struct cl_env *cle = hlist_entry(hn, struct cl_env, ce_node);
+
+       LASSERT(cle->ce_magic == &cl_env_init0);
+       return (void *)cle;
 }
 
-static int cl_env_hops_keycmp(const void *key, cfs_hlist_node_t *hn)
+static int cl_env_hops_keycmp(const void *key, struct hlist_node *hn)
 {
         struct cl_env *cle = cl_env_hops_obj(hn);
 
@@ -647,9 +641,9 @@ static int cl_env_hops_keycmp(const void *key, cfs_hlist_node_t *hn)
         return (key == cle->ce_owner);
 }
 
-static void cl_env_hops_noop(cfs_hash_t *hs, cfs_hlist_node_t *hn)
+static void cl_env_hops_noop(cfs_hash_t *hs, struct hlist_node *hn)
 {
-        struct cl_env *cle = cfs_hlist_entry(hn, struct cl_env, ce_node);
+       struct cl_env *cle = hlist_entry(hn, struct cl_env, ce_node);
         LASSERT(cle->ce_magic == &cl_env_init0);
 }
 
@@ -761,37 +755,37 @@ static inline struct cl_env *cl_env_detach(struct cl_env *cle)
 
 static struct lu_env *cl_env_new(__u32 ctx_tags, __u32 ses_tags, void *debug)
 {
-        struct lu_env *env;
-        struct cl_env *cle;
+       struct lu_env *env;
+       struct cl_env *cle;
 
-       OBD_SLAB_ALLOC_PTR_GFP(cle, cl_env_kmem, __GFP_IO);
-        if (cle != NULL) {
-                int rc;
+       OBD_SLAB_ALLOC_PTR_GFP(cle, cl_env_kmem, GFP_NOFS);
+       if (cle != NULL) {
+               int rc;
 
-                CFS_INIT_LIST_HEAD(&cle->ce_linkage);
-                cle->ce_magic = &cl_env_init0;
-                env = &cle->ce_lu;
-                rc = lu_env_init(env, LCT_CL_THREAD|ctx_tags);
-                if (rc == 0) {
-                        rc = lu_context_init(&cle->ce_ses,
-                                             LCT_SESSION | ses_tags);
-                        if (rc == 0) {
-                                lu_context_enter(&cle->ce_ses);
-                                env->le_ses = &cle->ce_ses;
-                                cl_env_init0(cle, debug);
-                        } else
-                                lu_env_fini(env);
-                }
-                if (rc != 0) {
-                        OBD_SLAB_FREE_PTR(cle, cl_env_kmem);
-                        env = ERR_PTR(rc);
-                } else {
-                        CL_ENV_INC(create);
-                        CL_ENV_INC(total);
-                }
-        } else
-                env = ERR_PTR(-ENOMEM);
-        return env;
+               INIT_LIST_HEAD(&cle->ce_linkage);
+               cle->ce_magic = &cl_env_init0;
+               env = &cle->ce_lu;
+               rc = lu_env_init(env, LCT_CL_THREAD|ctx_tags);
+               if (rc == 0) {
+                       rc = lu_context_init(&cle->ce_ses,
+                                            LCT_SESSION | ses_tags);
+                       if (rc == 0) {
+                               lu_context_enter(&cle->ce_ses);
+                               env->le_ses = &cle->ce_ses;
+                               cl_env_init0(cle, debug);
+                       } else
+                               lu_env_fini(env);
+               }
+               if (rc != 0) {
+                       OBD_SLAB_FREE_PTR(cle, cl_env_kmem);
+                       env = ERR_PTR(rc);
+               } else {
+                       CL_ENV_INC(create);
+                       CL_ENV_INC(total);
+               }
+       } else
+               env = ERR_PTR(-ENOMEM);
+       return env;
 }
 
 static void cl_env_fini(struct cl_env *cle)
@@ -809,12 +803,12 @@ static struct lu_env *cl_env_obtain(void *debug)
 
        ENTRY;
        spin_lock(&cl_envs_guard);
-       LASSERT(equi(cl_envs_cached_nr == 0, cfs_list_empty(&cl_envs)));
+       LASSERT(equi(cl_envs_cached_nr == 0, list_empty(&cl_envs)));
        if (cl_envs_cached_nr > 0) {
                int rc;
 
                cle = container_of(cl_envs.next, struct cl_env, ce_linkage);
-               cfs_list_del_init(&cle->ce_linkage);
+               list_del_init(&cle->ce_linkage);
                cl_envs_cached_nr--;
                spin_unlock(&cl_envs_guard);
 
@@ -936,9 +930,9 @@ unsigned cl_env_cache_purge(unsigned nr)
 
        ENTRY;
        spin_lock(&cl_envs_guard);
-       for (; !cfs_list_empty(&cl_envs) && nr > 0; --nr) {
+       for (; !list_empty(&cl_envs) && nr > 0; --nr) {
                cle = container_of(cl_envs.next, struct cl_env, ce_linkage);
-               cfs_list_del_init(&cle->ce_linkage);
+               list_del_init(&cle->ce_linkage);
                LASSERT(cl_envs_cached_nr > 0);
                cl_envs_cached_nr--;
                spin_unlock(&cl_envs_guard);
@@ -946,7 +940,7 @@ unsigned cl_env_cache_purge(unsigned nr)
                cl_env_fini(cle);
                spin_lock(&cl_envs_guard);
        }
-       LASSERT(equi(cl_envs_cached_nr == 0, cfs_list_empty(&cl_envs)));
+       LASSERT(equi(cl_envs_cached_nr == 0, list_empty(&cl_envs)));
        spin_unlock(&cl_envs_guard);
        RETURN(nr);
 }
@@ -984,7 +978,7 @@ void cl_env_put(struct lu_env *env, int *refcheck)
                     (env->le_ctx.lc_tags & ~LCT_HAS_EXIT) == LCT_CL_THREAD &&
                     (env->le_ses->lc_tags & ~LCT_HAS_EXIT) == LCT_SESSION) {
                        spin_lock(&cl_envs_guard);
-                       cfs_list_add(&cle->ce_linkage, &cl_envs);
+                       list_add(&cle->ce_linkage, &cl_envs);
                        cl_envs_cached_nr++;
                        spin_unlock(&cl_envs_guard);
                } else
@@ -1130,7 +1124,7 @@ static int cl_env_percpu_init(void)
                cle = &cl_env_percpu[i];
                env = &cle->ce_lu;
 
-               CFS_INIT_LIST_HEAD(&cle->ce_linkage);
+               INIT_LIST_HEAD(&cle->ce_linkage);
                cle->ce_magic = &cl_env_init0;
                rc = lu_env_init(env, LCT_CL_THREAD | tags);
                if (rc == 0) {
@@ -1344,11 +1338,13 @@ static struct lu_kmem_descr cl_object_caches[] = {
  */
 int cl_global_init(void)
 {
-        int result;
+       int result;
 
-        result = cl_env_store_init();
-        if (result)
-                return result;
+       INIT_LIST_HEAD(&cl_envs);
+
+       result = cl_env_store_init();
+       if (result)
+               return result;
 
         result = lu_kmem_init(cl_object_caches);
         if (result)