[PATCH] ocfs2: use list_for_each_entry where benefical
authorChristoph Hellwig <hch@lst.de>
Thu, 17 May 2007 14:03:13 +0000 (16:03 +0200)
committerMark Fasheh <mark.fasheh@oracle.com>
Wed, 11 Jul 2007 00:19:49 +0000 (17:19 -0700)
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
fs/ocfs2/cluster/tcp.c
fs/ocfs2/dlm/dlmmaster.c
fs/ocfs2/dlm/dlmrecovery.c
fs/ocfs2/dlmglue.c
fs/ocfs2/extent_map.c
fs/ocfs2/journal.c

index d58c7dd..f0bdfd9 100644 (file)
@@ -261,14 +261,12 @@ out:
 
 static void o2net_complete_nodes_nsw(struct o2net_node *nn)
 {
-       struct list_head *iter, *tmp;
+       struct o2net_status_wait *nsw, *tmp;
        unsigned int num_kills = 0;
-       struct o2net_status_wait *nsw;
 
        assert_spin_locked(&nn->nn_lock);
 
-       list_for_each_safe(iter, tmp, &nn->nn_status_list) {
-               nsw = list_entry(iter, struct o2net_status_wait, ns_node_item);
+       list_for_each_entry_safe(nsw, tmp, &nn->nn_status_list, ns_node_item) {
                o2net_complete_nsw_locked(nn, nsw, O2NET_ERR_DIED, 0);
                num_kills++;
        }
@@ -764,13 +762,10 @@ EXPORT_SYMBOL_GPL(o2net_register_handler);
 
 void o2net_unregister_handler_list(struct list_head *list)
 {
-       struct list_head *pos, *n;
-       struct o2net_msg_handler *nmh;
+       struct o2net_msg_handler *nmh, *n;
 
        write_lock(&o2net_handler_lock);
-       list_for_each_safe(pos, n, list) {
-               nmh = list_entry(pos, struct o2net_msg_handler,
-                                nh_unregister_item);
+       list_for_each_entry_safe(nmh, n, list, nh_unregister_item) {
                mlog(ML_TCP, "unregistering handler func %p type %u key %08x\n",
                     nmh->nh_func, nmh->nh_msg_type, nmh->nh_key);
                rb_erase(&nmh->nh_node, &o2net_handler_tree);
index 6edffca..65b2b9b 100644 (file)
@@ -192,25 +192,20 @@ static void dlm_print_one_mle(struct dlm_master_list_entry *mle)
 static void dlm_dump_mles(struct dlm_ctxt *dlm)
 {
        struct dlm_master_list_entry *mle;
-       struct list_head *iter;
        
        mlog(ML_NOTICE, "dumping all mles for domain %s:\n", dlm->name);
        spin_lock(&dlm->master_lock);
-       list_for_each(iter, &dlm->master_list) {
-               mle = list_entry(iter, struct dlm_master_list_entry, list);
+       list_for_each_entry(mle, &dlm->master_list, list)
                dlm_print_one_mle(mle);
-       }
        spin_unlock(&dlm->master_lock);
 }
 
 int dlm_dump_all_mles(const char __user *data, unsigned int len)
 {
-       struct list_head *iter;
        struct dlm_ctxt *dlm;
 
        spin_lock(&dlm_domain_lock);
-       list_for_each(iter, &dlm_domains) {
-               dlm = list_entry (iter, struct dlm_ctxt, list);
+       list_for_each_entry(dlm, &dlm_domains, list) {
                mlog(ML_NOTICE, "found dlm: %p, name=%s\n", dlm, dlm->name);
                dlm_dump_mles(dlm);
        }
@@ -454,12 +449,10 @@ static int dlm_find_mle(struct dlm_ctxt *dlm,
                        char *name, unsigned int namelen)
 {
        struct dlm_master_list_entry *tmpmle;
-       struct list_head *iter;
 
        assert_spin_locked(&dlm->master_lock);
 
-       list_for_each(iter, &dlm->master_list) {
-               tmpmle = list_entry(iter, struct dlm_master_list_entry, list);
+       list_for_each_entry(tmpmle, &dlm->master_list, list) {
                if (!dlm_mle_equal(dlm, tmpmle, name, namelen))
                        continue;
                dlm_get_mle(tmpmle);
@@ -472,13 +465,10 @@ static int dlm_find_mle(struct dlm_ctxt *dlm,
 void dlm_hb_event_notify_attached(struct dlm_ctxt *dlm, int idx, int node_up)
 {
        struct dlm_master_list_entry *mle;
-       struct list_head *iter;
 
        assert_spin_locked(&dlm->spinlock);
        
-       list_for_each(iter, &dlm->mle_hb_events) {
-               mle = list_entry(iter, struct dlm_master_list_entry, 
-                                hb_events);
+       list_for_each_entry(mle, &dlm->mle_hb_events, hb_events) {
                if (node_up)
                        dlm_mle_node_up(dlm, mle, NULL, idx);
                else
@@ -2434,7 +2424,7 @@ static int dlm_is_lockres_migrateable(struct dlm_ctxt *dlm,
        int ret;
        int i;
        int count = 0;
-       struct list_head *queue, *iter;
+       struct list_head *queue;
        struct dlm_lock *lock;
 
        assert_spin_locked(&res->spinlock);
@@ -2453,8 +2443,7 @@ static int dlm_is_lockres_migrateable(struct dlm_ctxt *dlm,
        ret = 0;
        queue = &res->granted;
        for (i = 0; i < 3; i++) {
-               list_for_each(iter, queue) {
-                       lock = list_entry(iter, struct dlm_lock, list);
+               list_for_each_entry(lock, queue, list) {
                        ++count;
                        if (lock->ml.node == dlm->node_num) {
                                mlog(0, "found a lock owned by this node still "
@@ -2923,18 +2912,16 @@ again:
 static void dlm_remove_nonlocal_locks(struct dlm_ctxt *dlm,
                                      struct dlm_lock_resource *res)
 {
-       struct list_head *iter, *iter2;
        struct list_head *queue = &res->granted;
        int i, bit;
-       struct dlm_lock *lock;
+       struct dlm_lock *lock, *next;
 
        assert_spin_locked(&res->spinlock);
 
        BUG_ON(res->owner == dlm->node_num);
 
        for (i=0; i<3; i++) {
-               list_for_each_safe(iter, iter2, queue) {
-                       lock = list_entry (iter, struct dlm_lock, list);
+               list_for_each_entry_safe(lock, next, queue, list) {
                        if (lock->ml.node != dlm->node_num) {
                                mlog(0, "putting lock for node %u\n",
                                     lock->ml.node);
@@ -2976,7 +2963,6 @@ static u8 dlm_pick_migration_target(struct dlm_ctxt *dlm,
 {
        int i;
        struct list_head *queue = &res->granted;
-       struct list_head *iter;
        struct dlm_lock *lock;
        int nodenum;
 
@@ -2984,10 +2970,9 @@ static u8 dlm_pick_migration_target(struct dlm_ctxt *dlm,
 
        spin_lock(&res->spinlock);
        for (i=0; i<3; i++) {
-               list_for_each(iter, queue) {
+               list_for_each_entry(lock, queue, list) {
                        /* up to the caller to make sure this node
                         * is alive */
-                       lock = list_entry (iter, struct dlm_lock, list);
                        if (lock->ml.node != dlm->node_num) {
                                spin_unlock(&res->spinlock);
                                return lock->ml.node;
@@ -3234,8 +3219,7 @@ static int dlm_add_migration_mle(struct dlm_ctxt *dlm,
 
 void dlm_clean_master_list(struct dlm_ctxt *dlm, u8 dead_node)
 {
-       struct list_head *iter, *iter2;
-       struct dlm_master_list_entry *mle;
+       struct dlm_master_list_entry *mle, *next;
        struct dlm_lock_resource *res;
        unsigned int hash;
 
@@ -3245,9 +3229,7 @@ top:
 
        /* clean the master list */
        spin_lock(&dlm->master_lock);
-       list_for_each_safe(iter, iter2, &dlm->master_list) {
-               mle = list_entry(iter, struct dlm_master_list_entry, list);
-
+       list_for_each_entry_safe(mle, next, &dlm->master_list, list) {
                BUG_ON(mle->type != DLM_MLE_BLOCK &&
                       mle->type != DLM_MLE_MASTER &&
                       mle->type != DLM_MLE_MIGRATION);
index 671c4ed..74d276e 100644 (file)
@@ -158,8 +158,7 @@ void dlm_dispatch_work(struct work_struct *work)
        struct dlm_ctxt *dlm =
                container_of(work, struct dlm_ctxt, dispatched_work);
        LIST_HEAD(tmp_list);
-       struct list_head *iter, *iter2;
-       struct dlm_work_item *item;
+       struct dlm_work_item *item, *next;
        dlm_workfunc_t *workfunc;
        int tot=0;
 
@@ -167,13 +166,12 @@ void dlm_dispatch_work(struct work_struct *work)
        list_splice_init(&dlm->work_list, &tmp_list);
        spin_unlock(&dlm->work_lock);
 
-       list_for_each_safe(iter, iter2, &tmp_list) {
+       list_for_each_entry(item, &tmp_list, list) {
                tot++;
        }
        mlog(0, "%s: work thread has %d work items\n", dlm->name, tot);
 
-       list_for_each_safe(iter, iter2, &tmp_list) {
-               item = list_entry(iter, struct dlm_work_item, list);
+       list_for_each_entry_safe(item, next, &tmp_list, list) {
                workfunc = item->func;
                list_del_init(&item->list);
 
@@ -549,7 +547,6 @@ static int dlm_remaster_locks(struct dlm_ctxt *dlm, u8 dead_node)
 {
        int status = 0;
        struct dlm_reco_node_data *ndata;
-       struct list_head *iter;
        int all_nodes_done;
        int destroy = 0;
        int pass = 0;
@@ -567,8 +564,7 @@ static int dlm_remaster_locks(struct dlm_ctxt *dlm, u8 dead_node)
 
        /* safe to access the node data list without a lock, since this
         * process is the only one to change the list */
-       list_for_each(iter, &dlm->reco.node_data) {
-               ndata = list_entry (iter, struct dlm_reco_node_data, list);
+       list_for_each_entry(ndata, &dlm->reco.node_data, list) {
                BUG_ON(ndata->state != DLM_RECO_NODE_DATA_INIT);
                ndata->state = DLM_RECO_NODE_DATA_REQUESTING;
 
@@ -655,9 +651,7 @@ static int dlm_remaster_locks(struct dlm_ctxt *dlm, u8 dead_node)
                 * done, or if anyone died */
                all_nodes_done = 1;
                spin_lock(&dlm_reco_state_lock);
-               list_for_each(iter, &dlm->reco.node_data) {
-                       ndata = list_entry (iter, struct dlm_reco_node_data, list);
-
+               list_for_each_entry(ndata, &dlm->reco.node_data, list) {
                        mlog(0, "checking recovery state of node %u\n",
                             ndata->node_num);
                        switch (ndata->state) {
@@ -774,16 +768,14 @@ static int dlm_init_recovery_area(struct dlm_ctxt *dlm, u8 dead_node)
 
 static void dlm_destroy_recovery_area(struct dlm_ctxt *dlm, u8 dead_node)
 {
-       struct list_head *iter, *iter2;
-       struct dlm_reco_node_data *ndata;
+       struct dlm_reco_node_data *ndata, *next;
        LIST_HEAD(tmplist);
 
        spin_lock(&dlm_reco_state_lock);
        list_splice_init(&dlm->reco.node_data, &tmplist);
        spin_unlock(&dlm_reco_state_lock);
 
-       list_for_each_safe(iter, iter2, &tmplist) {
-               ndata = list_entry (iter, struct dlm_reco_node_data, list);
+       list_for_each_entry_safe(ndata, next, &tmplist, list) {
                list_del_init(&ndata->list);
                kfree(ndata);
        }
@@ -876,7 +868,6 @@ static void dlm_request_all_locks_worker(struct dlm_work_item *item, void *data)
        struct dlm_lock_resource *res;
        struct dlm_ctxt *dlm;
        LIST_HEAD(resources);
-       struct list_head *iter;
        int ret;
        u8 dead_node, reco_master;
        int skip_all_done = 0;
@@ -920,8 +911,7 @@ static void dlm_request_all_locks_worker(struct dlm_work_item *item, void *data)
 
        /* any errors returned will be due to the new_master dying,
         * the dlm_reco_thread should detect this */
-       list_for_each(iter, &resources) {
-               res = list_entry (iter, struct dlm_lock_resource, recovering);
+       list_for_each_entry(res, &resources, recovering) {
                ret = dlm_send_one_lockres(dlm, res, mres, reco_master,
                                        DLM_MRES_RECOVERY);
                if (ret < 0) {
@@ -983,7 +973,6 @@ int dlm_reco_data_done_handler(struct o2net_msg *msg, u32 len, void *data,
 {
        struct dlm_ctxt *dlm = data;
        struct dlm_reco_data_done *done = (struct dlm_reco_data_done *)msg->buf;
-       struct list_head *iter;
        struct dlm_reco_node_data *ndata = NULL;
        int ret = -EINVAL;
 
@@ -1000,8 +989,7 @@ int dlm_reco_data_done_handler(struct o2net_msg *msg, u32 len, void *data,
                        dlm->reco.dead_node, done->node_idx, dlm->node_num);
 
        spin_lock(&dlm_reco_state_lock);
-       list_for_each(iter, &dlm->reco.node_data) {
-               ndata = list_entry (iter, struct dlm_reco_node_data, list);
+       list_for_each_entry(ndata, &dlm->reco.node_data, list) {
                if (ndata->node_num != done->node_idx)
                        continue;
 
@@ -1049,13 +1037,11 @@ static void dlm_move_reco_locks_to_list(struct dlm_ctxt *dlm,
                                        struct list_head *list,
                                        u8 dead_node)
 {
-       struct dlm_lock_resource *res;
-       struct list_head *iter, *iter2;
+       struct dlm_lock_resource *res, *next;
        struct dlm_lock *lock;
 
        spin_lock(&dlm->spinlock);
-       list_for_each_safe(iter, iter2, &dlm->reco.resources) {
-               res = list_entry (iter, struct dlm_lock_resource, recovering);
+       list_for_each_entry_safe(res, next, &dlm->reco.resources, recovering) {
                /* always prune any $RECOVERY entries for dead nodes,
                 * otherwise hangs can occur during later recovery */
                if (dlm_is_recovery_lock(res->lockname.name,
@@ -1252,7 +1238,7 @@ int dlm_send_one_lockres(struct dlm_ctxt *dlm, struct dlm_lock_resource *res,
                         struct dlm_migratable_lockres *mres,
                         u8 send_to, u8 flags)
 {
-       struct list_head *queue, *iter;
+       struct list_head *queue;
        int total_locks, i;
        u64 mig_cookie = 0;
        struct dlm_lock *lock;
@@ -1278,9 +1264,7 @@ int dlm_send_one_lockres(struct dlm_ctxt *dlm, struct dlm_lock_resource *res,
        total_locks = 0;
        for (i=DLM_GRANTED_LIST; i<=DLM_BLOCKED_LIST; i++) {
                queue = dlm_list_idx_to_ptr(res, i);
-               list_for_each(iter, queue) {
-                       lock = list_entry (iter, struct dlm_lock, list);
-
+               list_for_each_entry(lock, queue, list) {
                        /* add another lock. */
                        total_locks++;
                        if (!dlm_add_lock_to_array(lock, mres, i))
@@ -1717,7 +1701,6 @@ static int dlm_process_recovery_data(struct dlm_ctxt *dlm,
        struct dlm_lockstatus *lksb = NULL;
        int ret = 0;
        int i, j, bad;
-       struct list_head *iter;
        struct dlm_lock *lock = NULL;
        u8 from = O2NM_MAX_NODES;
        unsigned int added = 0;
@@ -1755,8 +1738,7 @@ static int dlm_process_recovery_data(struct dlm_ctxt *dlm,
                        spin_lock(&res->spinlock);
                        for (j = DLM_GRANTED_LIST; j <= DLM_BLOCKED_LIST; j++) {
                                tmpq = dlm_list_idx_to_ptr(res, j);
-                               list_for_each(iter, tmpq) {
-                                       lock = list_entry (iter, struct dlm_lock, list);
+                               list_for_each_entry(lock, tmpq, list) {
                                        if (lock->ml.cookie != ml->cookie)
                                                lock = NULL;
                                        else
@@ -1930,8 +1912,8 @@ void dlm_move_lockres_to_recovery_list(struct dlm_ctxt *dlm,
                                       struct dlm_lock_resource *res)
 {
        int i;
-       struct list_head *queue, *iter, *iter2;
-       struct dlm_lock *lock;
+       struct list_head *queue;
+       struct dlm_lock *lock, *next;
 
        res->state |= DLM_LOCK_RES_RECOVERING;
        if (!list_empty(&res->recovering)) {
@@ -1947,8 +1929,7 @@ void dlm_move_lockres_to_recovery_list(struct dlm_ctxt *dlm,
        /* find any pending locks and put them back on proper list */
        for (i=DLM_BLOCKED_LIST; i>=DLM_GRANTED_LIST; i--) {
                queue = dlm_list_idx_to_ptr(res, i);
-               list_for_each_safe(iter, iter2, queue) {
-                       lock = list_entry (iter, struct dlm_lock, list);
+               list_for_each_entry_safe(lock, next, queue, list) {
                        dlm_lock_get(lock);
                        if (lock->convert_pending) {
                                /* move converting lock back to granted */
@@ -2013,18 +1994,15 @@ static void dlm_finish_local_lockres_recovery(struct dlm_ctxt *dlm,
                                              u8 dead_node, u8 new_master)
 {
        int i;
-       struct list_head *iter, *iter2;
        struct hlist_node *hash_iter;
        struct hlist_head *bucket;
-
-       struct dlm_lock_resource *res;
+       struct dlm_lock_resource *res, *next;
 
        mlog_entry_void();
 
        assert_spin_locked(&dlm->spinlock);
 
-       list_for_each_safe(iter, iter2, &dlm->reco.resources) {
-               res = list_entry (iter, struct dlm_lock_resource, recovering);
+       list_for_each_entry_safe(res, next, &dlm->reco.resources, recovering) {
                if (res->owner == dead_node) {
                        list_del_init(&res->recovering);
                        spin_lock(&res->spinlock);
@@ -2099,7 +2077,7 @@ static inline int dlm_lvb_needs_invalidation(struct dlm_lock *lock, int local)
 static void dlm_revalidate_lvb(struct dlm_ctxt *dlm,
                               struct dlm_lock_resource *res, u8 dead_node)
 {
-       struct list_head *iter, *queue;
+       struct list_head *queue;
        struct dlm_lock *lock;
        int blank_lvb = 0, local = 0;
        int i;
@@ -2121,8 +2099,7 @@ static void dlm_revalidate_lvb(struct dlm_ctxt *dlm,
 
        for (i=DLM_GRANTED_LIST; i<=DLM_CONVERTING_LIST; i++) {
                queue = dlm_list_idx_to_ptr(res, i);
-               list_for_each(iter, queue) {
-                       lock = list_entry (iter, struct dlm_lock, list);
+               list_for_each_entry(lock, queue, list) {
                        if (lock->ml.node == search_node) {
                                if (dlm_lvb_needs_invalidation(lock, local)) {
                                        /* zero the lksb lvb and lockres lvb */
@@ -2143,8 +2120,7 @@ static void dlm_revalidate_lvb(struct dlm_ctxt *dlm,
 static void dlm_free_dead_locks(struct dlm_ctxt *dlm,
                                struct dlm_lock_resource *res, u8 dead_node)
 {
-       struct list_head *iter, *tmpiter;
-       struct dlm_lock *lock;
+       struct dlm_lock *lock, *next;
        unsigned int freed = 0;
 
        /* this node is the lockres master:
@@ -2155,24 +2131,21 @@ static void dlm_free_dead_locks(struct dlm_ctxt *dlm,
        assert_spin_locked(&res->spinlock);
 
        /* TODO: check pending_asts, pending_basts here */
-       list_for_each_safe(iter, tmpiter, &res->granted) {
-               lock = list_entry (iter, struct dlm_lock, list);
+       list_for_each_entry_safe(lock, next, &res->granted, list) {
                if (lock->ml.node == dead_node) {
                        list_del_init(&lock->list);
                        dlm_lock_put(lock);
                        freed++;
                }
        }
-       list_for_each_safe(iter, tmpiter, &res->converting) {
-               lock = list_entry (iter, struct dlm_lock, list);
+       list_for_each_entry_safe(lock, next, &res->converting, list) {
                if (lock->ml.node == dead_node) {
                        list_del_init(&lock->list);
                        dlm_lock_put(lock);
                        freed++;
                }
        }
-       list_for_each_safe(iter, tmpiter, &res->blocked) {
-               lock = list_entry (iter, struct dlm_lock, list);
+       list_for_each_entry_safe(lock, next, &res->blocked, list) {
                if (lock->ml.node == dead_node) {
                        list_del_init(&lock->list);
                        dlm_lock_put(lock);
index d1bd305..f71250e 100644 (file)
@@ -600,15 +600,13 @@ static inline int ocfs2_highest_compat_lock_level(int level)
 static void lockres_set_flags(struct ocfs2_lock_res *lockres,
                              unsigned long newflags)
 {
-       struct list_head *pos, *tmp;
-       struct ocfs2_mask_waiter *mw;
+       struct ocfs2_mask_waiter *mw, *tmp;
 
        assert_spin_locked(&lockres->l_lock);
 
        lockres->l_flags = newflags;
 
-       list_for_each_safe(pos, tmp, &lockres->l_mask_waiters) {
-               mw = list_entry(pos, struct ocfs2_mask_waiter, mw_item);
+       list_for_each_entry_safe(mw, tmp, &lockres->l_mask_waiters, mw_item) {
                if ((lockres->l_flags & mw->mw_mask) != mw->mw_goal)
                        continue;
 
index ba2b2ab..e23e416 100644 (file)
@@ -109,17 +109,14 @@ static int ocfs2_extent_map_lookup(struct inode *inode, unsigned int cpos,
  */
 void ocfs2_extent_map_trunc(struct inode *inode, unsigned int cpos)
 {
-       struct list_head *p, *n;
-       struct ocfs2_extent_map_item *emi;
+       struct ocfs2_extent_map_item *emi, *n;
        struct ocfs2_inode_info *oi = OCFS2_I(inode);
        struct ocfs2_extent_map *em = &oi->ip_extent_map;
        LIST_HEAD(tmp_list);
        unsigned int range;
 
        spin_lock(&oi->ip_lock);
-       list_for_each_safe(p, n, &em->em_list) {
-               emi = list_entry(p, struct ocfs2_extent_map_item, ei_list);
-
+       list_for_each_entry_safe(emi, n, &em->em_list, ei_list) {
                if (emi->ei_cpos >= cpos) {
                        /* Full truncate of this record. */
                        list_move(&emi->ei_list, &tmp_list);
@@ -136,8 +133,7 @@ void ocfs2_extent_map_trunc(struct inode *inode, unsigned int cpos)
        }
        spin_unlock(&oi->ip_lock);
 
-       list_for_each_safe(p, n, &tmp_list) {
-               emi = list_entry(p, struct ocfs2_extent_map_item, ei_list);
+       list_for_each_entry_safe(emi, n, &tmp_list, ei_list) {
                list_del(&emi->ei_list);
                kfree(emi);
        }
index dc11880..dbfb20b 100644 (file)
@@ -722,8 +722,7 @@ void ocfs2_complete_recovery(struct work_struct *work)
                container_of(work, struct ocfs2_journal, j_recovery_work);
        struct ocfs2_super *osb = journal->j_osb;
        struct ocfs2_dinode *la_dinode, *tl_dinode;
-       struct ocfs2_la_recovery_item *item;
-       struct list_head *p, *n;
+       struct ocfs2_la_recovery_item *item, *n;
        LIST_HEAD(tmp_la_list);
 
        mlog_entry_void();
@@ -734,8 +733,7 @@ void ocfs2_complete_recovery(struct work_struct *work)
        list_splice_init(&journal->j_la_cleanups, &tmp_la_list);
        spin_unlock(&journal->j_lock);
 
-       list_for_each_safe(p, n, &tmp_la_list) {
-               item = list_entry(p, struct ocfs2_la_recovery_item, lri_list);
+       list_for_each_entry_safe(item, n, &tmp_la_list, lri_list) {
                list_del_init(&item->lri_list);
 
                mlog(0, "Complete recovery for slot %d\n", item->lri_slot);