diff options
| -rw-r--r-- | net/core/request_sock.c | 43 |
1 files changed, 12 insertions, 31 deletions
diff --git a/net/core/request_sock.c b/net/core/request_sock.c index 467f326126e0..04db318e6218 100644 --- a/net/core/request_sock.c +++ b/net/core/request_sock.c @@ -41,27 +41,27 @@ int reqsk_queue_alloc(struct request_sock_queue *queue, unsigned int nr_table_entries) { size_t lopt_size = sizeof(struct listen_sock); - struct listen_sock *lopt; + struct listen_sock *lopt = NULL; nr_table_entries = min_t(u32, nr_table_entries, sysctl_max_syn_backlog); nr_table_entries = max_t(u32, nr_table_entries, 8); nr_table_entries = roundup_pow_of_two(nr_table_entries + 1); lopt_size += nr_table_entries * sizeof(struct request_sock *); - if (lopt_size > PAGE_SIZE) + + if (lopt_size <= (PAGE_SIZE << PAGE_ALLOC_COSTLY_ORDER)) + lopt = kzalloc(lopt_size, GFP_KERNEL | + __GFP_NOWARN | + __GFP_NORETRY); + if (!lopt) lopt = vzalloc(lopt_size); - else - lopt = kzalloc(lopt_size, GFP_KERNEL); - if (lopt == NULL) + if (!lopt) return -ENOMEM; - for (lopt->max_qlen_log = 3; - (1 << lopt->max_qlen_log) < nr_table_entries; - lopt->max_qlen_log++); - get_random_bytes(&lopt->hash_rnd, sizeof(lopt->hash_rnd)); rwlock_init(&queue->syn_wait_lock); queue->rskq_accept_head = NULL; lopt->nr_table_entries = nr_table_entries; + lopt->max_qlen_log = ilog2(nr_table_entries); write_lock_bh(&queue->syn_wait_lock); queue->listen_opt = lopt; @@ -72,22 +72,8 @@ int reqsk_queue_alloc(struct request_sock_queue *queue, void __reqsk_queue_destroy(struct request_sock_queue *queue) { - struct listen_sock *lopt; - size_t lopt_size; - - /* - * this is an error recovery path only - * no locking needed and the lopt is not NULL - */ - - lopt = queue->listen_opt; - lopt_size = sizeof(struct listen_sock) + - lopt->nr_table_entries * sizeof(struct request_sock *); - - if (lopt_size > PAGE_SIZE) - vfree(lopt); - else - kfree(lopt); + /* This is an error recovery path only, no locking needed */ + kvfree(queue->listen_opt); } static inline struct listen_sock *reqsk_queue_yank_listen_sk( @@ -107,8 +93,6 @@ void reqsk_queue_destroy(struct request_sock_queue *queue) { /* make all the listen_opt local to us */ struct listen_sock *lopt = reqsk_queue_yank_listen_sk(queue); - size_t lopt_size = sizeof(struct listen_sock) + - lopt->nr_table_entries * sizeof(struct request_sock *); if (lopt->qlen != 0) { unsigned int i; @@ -125,10 +109,7 @@ void reqsk_queue_destroy(struct request_sock_queue *queue) } WARN_ON(lopt->qlen != 0); - if (lopt_size > PAGE_SIZE) - vfree(lopt); - else - kfree(lopt); + kvfree(lopt); } /* |