#include <net/xfrm.h>
#include <asm/ioctls.h>
-#include <asm/semaphore.h>
#include <linux/spinlock.h>
#include <linux/timer.h>
#include <linux/delay.h>
EXPORT_SYMBOL_GPL(dccp_statistics);
-atomic_t dccp_orphan_count = ATOMIC_INIT(0);
-
+struct percpu_counter dccp_orphan_count;
EXPORT_SYMBOL_GPL(dccp_orphan_count);
-struct inet_hashinfo __cacheline_aligned dccp_hashinfo = {
- .lhash_lock = RW_LOCK_UNLOCKED,
- .lhash_users = ATOMIC_INIT(0),
- .lhash_wait = __WAIT_QUEUE_HEAD_INITIALIZER(dccp_hashinfo.lhash_wait),
-};
-
+struct inet_hashinfo dccp_hashinfo;
EXPORT_SYMBOL_GPL(dccp_hashinfo);
/* the maximum queue length for tx in packets. 0 is no limit */
case DCCP_OPEN:
if (oldstate != DCCP_OPEN)
DCCP_INC_STATS(DCCP_MIB_CURRESTAB);
+ /* Client retransmits all Confirm options until entering OPEN */
+ if (oldstate == DCCP_PARTOPEN)
+ dccp_feat_list_purge(&dccp_sk(sk)->dccps_featneg);
break;
case DCCP_CLOSED:
int dccp_init_sock(struct sock *sk, const __u8 ctl_sock_initialized)
{
struct dccp_sock *dp = dccp_sk(sk);
- struct dccp_minisock *dmsk = dccp_msk(sk);
struct inet_connection_sock *icsk = inet_csk(sk);
- dccp_minisock_init(&dp->dccps_minisock);
-
icsk->icsk_rto = DCCP_TIMEOUT_INIT;
icsk->icsk_syn_retries = sysctl_dccp_request_retries;
sk->sk_state = DCCP_CLOSED;
dccp_init_xmit_timers(sk);
- /*
- * FIXME: We're hardcoding the CCID, and doing this at this point makes
- * the listening (master) sock get CCID control blocks, which is not
- * necessary, but for now, to not mess with the test userspace apps,
- * lets leave it here, later the real solution is to do this in a
- * setsockopt(CCIDs-I-want/accept). -acme
- */
- if (likely(ctl_sock_initialized)) {
- int rc = dccp_feat_init(dmsk);
-
- if (rc)
- return rc;
-
- if (dmsk->dccpms_send_ack_vector) {
- dp->dccps_hc_rx_ackvec = dccp_ackvec_alloc(GFP_KERNEL);
- if (dp->dccps_hc_rx_ackvec == NULL)
- return -ENOMEM;
- }
- dp->dccps_hc_rx_ccid = ccid_hc_rx_new(dmsk->dccpms_rx_ccid,
- sk, GFP_KERNEL);
- dp->dccps_hc_tx_ccid = ccid_hc_tx_new(dmsk->dccpms_tx_ccid,
- sk, GFP_KERNEL);
- if (unlikely(dp->dccps_hc_rx_ccid == NULL ||
- dp->dccps_hc_tx_ccid == NULL)) {
- ccid_hc_rx_delete(dp->dccps_hc_rx_ccid, sk);
- ccid_hc_tx_delete(dp->dccps_hc_tx_ccid, sk);
- if (dmsk->dccpms_send_ack_vector) {
- dccp_ackvec_free(dp->dccps_hc_rx_ackvec);
- dp->dccps_hc_rx_ackvec = NULL;
- }
- dp->dccps_hc_rx_ccid = dp->dccps_hc_tx_ccid = NULL;
- return -ENOMEM;
- }
- } else {
- /* control socket doesn't need feat nego */
- INIT_LIST_HEAD(&dmsk->dccpms_pending);
- INIT_LIST_HEAD(&dmsk->dccpms_conf);
- }
-
+ INIT_LIST_HEAD(&dp->dccps_featneg);
+ /* control socket doesn't need feat nego */
+ if (likely(ctl_sock_initialized))
+ return dccp_feat_init(sk);
return 0;
}
EXPORT_SYMBOL_GPL(dccp_init_sock);
-int dccp_destroy_sock(struct sock *sk)
+void dccp_destroy_sock(struct sock *sk)
{
struct dccp_sock *dp = dccp_sk(sk);
- struct dccp_minisock *dmsk = dccp_msk(sk);
/*
* DCCP doesn't use sk_write_queue, just sk_send_head
kfree(dp->dccps_service_list);
dp->dccps_service_list = NULL;
- if (dmsk->dccpms_send_ack_vector) {
+ if (dp->dccps_hc_rx_ackvec != NULL) {
dccp_ackvec_free(dp->dccps_hc_rx_ackvec);
dp->dccps_hc_rx_ackvec = NULL;
}
dp->dccps_hc_rx_ccid = dp->dccps_hc_tx_ccid = NULL;
/* clean up feature negotiation state */
- dccp_feat_clean(dmsk);
-
- return 0;
+ dccp_feat_list_purge(&dp->dccps_featneg);
}
EXPORT_SYMBOL_GPL(dccp_destroy_sock);
struct dccp_sock *dp = dccp_sk(sk);
dp->dccps_role = DCCP_ROLE_LISTEN;
+ /* do not start to listen if feature negotiation setup fails */
+ if (dccp_feat_finalise_settings(dp))
+ return -EPROTO;
return inet_csk_listen_start(sk, backlog);
}
sk->sk_err = ECONNRESET;
dccp_clear_xmit_timers(sk);
+
__skb_queue_purge(&sk->sk_receive_queue);
+ __skb_queue_purge(&sk->sk_write_queue);
if (sk->sk_send_head != NULL) {
__kfree_skb(sk->sk_send_head);
sk->sk_send_head = NULL;
inet_csk_delack_init(sk);
__sk_dst_reset(sk);
- BUG_TRAP(!inet->num || icsk->icsk_bind_hash);
+ WARN_ON(inet->num && !icsk->icsk_bind_hash);
sk->sk_error_report(sk);
return err;
return 0;
}
-/* byte 1 is feature. the rest is the preference list */
-static int dccp_setsockopt_change(struct sock *sk, int type,
- struct dccp_so_feat __user *optval)
+static int dccp_setsockopt_cscov(struct sock *sk, int cscov, bool rx)
+{
+ u8 *list, len;
+ int i, rc;
+
+ if (cscov < 0 || cscov > 15)
+ return -EINVAL;
+ /*
+ * Populate a list of permissible values, in the range cscov...15. This
+ * is necessary since feature negotiation of single values only works if
+ * both sides incidentally choose the same value. Since the list starts
+ * lowest-value first, negotiation will pick the smallest shared value.
+ */
+ if (cscov == 0)
+ return 0;
+ len = 16 - cscov;
+
+ list = kmalloc(len, GFP_KERNEL);
+ if (list == NULL)
+ return -ENOBUFS;
+
+ for (i = 0; i < len; i++)
+ list[i] = cscov++;
+
+ rc = dccp_feat_register_sp(sk, DCCPF_MIN_CSUM_COVER, rx, list, len);
+
+ if (rc == 0) {
+ if (rx)
+ dccp_sk(sk)->dccps_pcrlen = cscov;
+ else
+ dccp_sk(sk)->dccps_pcslen = cscov;
+ }
+ kfree(list);
+ return rc;
+}
+
+static int dccp_setsockopt_ccid(struct sock *sk, int type,
+ char __user *optval, int optlen)
{
- struct dccp_so_feat opt;
u8 *val;
- int rc;
+ int rc = 0;
- if (copy_from_user(&opt, optval, sizeof(opt)))
- return -EFAULT;
+ if (optlen < 1 || optlen > DCCP_FEAT_MAX_SP_VALS)
+ return -EINVAL;
- val = kmalloc(opt.dccpsf_len, GFP_KERNEL);
- if (!val)
+ val = kmalloc(optlen, GFP_KERNEL);
+ if (val == NULL)
return -ENOMEM;
- if (copy_from_user(val, opt.dccpsf_val, opt.dccpsf_len)) {
- rc = -EFAULT;
- goto out_free_val;
+ if (copy_from_user(val, optval, optlen)) {
+ kfree(val);
+ return -EFAULT;
}
- rc = dccp_feat_change(dccp_msk(sk), type, opt.dccpsf_feat,
- val, opt.dccpsf_len, GFP_KERNEL);
- if (rc)
- goto out_free_val;
+ lock_sock(sk);
+ if (type == DCCP_SOCKOPT_TX_CCID || type == DCCP_SOCKOPT_CCID)
+ rc = dccp_feat_register_sp(sk, DCCPF_CCID, 1, val, optlen);
-out:
- return rc;
+ if (!rc && (type == DCCP_SOCKOPT_RX_CCID || type == DCCP_SOCKOPT_CCID))
+ rc = dccp_feat_register_sp(sk, DCCPF_CCID, 0, val, optlen);
+ release_sock(sk);
-out_free_val:
kfree(val);
- goto out;
+ return rc;
}
static int do_dccp_setsockopt(struct sock *sk, int level, int optname,
struct dccp_sock *dp = dccp_sk(sk);
int val, err = 0;
- if (optlen < sizeof(int))
+ switch (optname) {
+ case DCCP_SOCKOPT_PACKET_SIZE:
+ DCCP_WARN("sockopt(PACKET_SIZE) is deprecated: fix your app\n");
+ return 0;
+ case DCCP_SOCKOPT_CHANGE_L:
+ case DCCP_SOCKOPT_CHANGE_R:
+ DCCP_WARN("sockopt(CHANGE_L/R) is deprecated: fix your app\n");
+ return 0;
+ case DCCP_SOCKOPT_CCID:
+ case DCCP_SOCKOPT_RX_CCID:
+ case DCCP_SOCKOPT_TX_CCID:
+ return dccp_setsockopt_ccid(sk, optname, optval, optlen);
+ }
+
+ if (optlen < (int)sizeof(int))
return -EINVAL;
if (get_user(val, (int __user *)optval))
lock_sock(sk);
switch (optname) {
- case DCCP_SOCKOPT_PACKET_SIZE:
- DCCP_WARN("sockopt(PACKET_SIZE) is deprecated: fix your app\n");
- err = 0;
- break;
- case DCCP_SOCKOPT_CHANGE_L:
- if (optlen != sizeof(struct dccp_so_feat))
- err = -EINVAL;
- else
- err = dccp_setsockopt_change(sk, DCCPO_CHANGE_L,
- (struct dccp_so_feat __user *)
- optval);
- break;
- case DCCP_SOCKOPT_CHANGE_R:
- if (optlen != sizeof(struct dccp_so_feat))
- err = -EINVAL;
- else
- err = dccp_setsockopt_change(sk, DCCPO_CHANGE_R,
- (struct dccp_so_feat __user *)
- optval);
- break;
case DCCP_SOCKOPT_SERVER_TIMEWAIT:
if (dp->dccps_role != DCCP_ROLE_SERVER)
err = -EOPNOTSUPP;
else
dp->dccps_server_timewait = (val != 0);
break;
- case DCCP_SOCKOPT_SEND_CSCOV: /* sender side, RFC 4340, sec. 9.2 */
- if (val < 0 || val > 15)
- err = -EINVAL;
- else
- dp->dccps_pcslen = val;
+ case DCCP_SOCKOPT_SEND_CSCOV:
+ err = dccp_setsockopt_cscov(sk, val, false);
break;
- case DCCP_SOCKOPT_RECV_CSCOV: /* receiver side, RFC 4340 sec. 9.2.1 */
- if (val < 0 || val > 15)
- err = -EINVAL;
- else {
- dp->dccps_pcrlen = val;
- /* FIXME: add feature negotiation,
- * ChangeL(MinimumChecksumCoverage, val) */
- }
+ case DCCP_SOCKOPT_RECV_CSCOV:
+ err = dccp_setsockopt_cscov(sk, val, true);
break;
default:
err = -ENOPROTOOPT;
break;
}
-
release_sock(sk);
+
return err;
}
case DCCP_SOCKOPT_GET_CUR_MPS:
val = dp->dccps_mss_cache;
break;
+ case DCCP_SOCKOPT_AVAILABLE_CCIDS:
+ return ccid_getsockopt_builtin_ccids(sk, len, optval, optlen);
+ case DCCP_SOCKOPT_TX_CCID:
+ val = ccid_get_current_tx_ccid(dp);
+ if (val < 0)
+ return -ENOPROTOOPT;
+ break;
+ case DCCP_SOCKOPT_RX_CCID:
+ val = ccid_get_current_rx_ccid(dp);
+ if (val < 0)
+ return -ENOPROTOOPT;
+ break;
case DCCP_SOCKOPT_SERVER_TIMEWAIT:
val = dp->dccps_server_timewait;
break;
state = sk->sk_state;
sock_hold(sk);
sock_orphan(sk);
- atomic_inc(sk->sk_prot->orphan_count);
/*
* It is the last release_sock in its life. It will remove backlog.
*/
local_bh_disable();
bh_lock_sock(sk);
- BUG_TRAP(!sock_owned_by_user(sk));
+ WARN_ON(sock_owned_by_user(sk));
+
+ percpu_counter_inc(sk->sk_prot->orphan_count);
/* Have we already been destroyed by a softirq or backlog? */
if (state != DCCP_CLOSED && sk->sk_state == DCCP_CLOSED)
EXPORT_SYMBOL_GPL(dccp_shutdown);
-static int __init dccp_mib_init(void)
+static inline int dccp_mib_init(void)
{
- int rc = -ENOMEM;
-
- dccp_statistics[0] = alloc_percpu(struct dccp_mib);
- if (dccp_statistics[0] == NULL)
- goto out;
-
- dccp_statistics[1] = alloc_percpu(struct dccp_mib);
- if (dccp_statistics[1] == NULL)
- goto out_free_one;
-
- rc = 0;
-out:
- return rc;
-out_free_one:
- free_percpu(dccp_statistics[0]);
- dccp_statistics[0] = NULL;
- goto out;
-
+ return snmp_mib_init((void**)dccp_statistics, sizeof(struct dccp_mib));
}
-static void dccp_mib_exit(void)
+static inline void dccp_mib_exit(void)
{
- free_percpu(dccp_statistics[0]);
- free_percpu(dccp_statistics[1]);
- dccp_statistics[0] = dccp_statistics[1] = NULL;
+ snmp_mib_free((void**)dccp_statistics);
}
static int thash_entries;
#ifdef CONFIG_IP_DCCP_DEBUG
int dccp_debug;
-module_param(dccp_debug, bool, 0444);
+module_param(dccp_debug, bool, 0644);
MODULE_PARM_DESC(dccp_debug, "Enable debug messages");
EXPORT_SYMBOL_GPL(dccp_debug);
{
unsigned long goal;
int ehash_order, bhash_order, i;
- int rc = -ENOBUFS;
+ int rc;
BUILD_BUG_ON(sizeof(struct dccp_skb_cb) >
FIELD_SIZEOF(struct sk_buff, cb));
-
+ rc = percpu_counter_init(&dccp_orphan_count, 0);
+ if (rc)
+ goto out;
+ rc = -ENOBUFS;
+ inet_hashinfo_init(&dccp_hashinfo);
dccp_hashinfo.bind_bucket_cachep =
kmem_cache_create("dccp_bind_bucket",
sizeof(struct inet_bind_bucket), 0,
SLAB_HWCACHE_ALIGN, NULL);
if (!dccp_hashinfo.bind_bucket_cachep)
- goto out;
+ goto out_free_percpu;
/*
* Size and allocate the main established and bind bucket
}
for (i = 0; i < dccp_hashinfo.ehash_size; i++) {
- INIT_HLIST_HEAD(&dccp_hashinfo.ehash[i].chain);
- INIT_HLIST_HEAD(&dccp_hashinfo.ehash[i].twchain);
+ INIT_HLIST_NULLS_HEAD(&dccp_hashinfo.ehash[i].chain, i);
+ INIT_HLIST_NULLS_HEAD(&dccp_hashinfo.ehash[i].twchain, i);
}
if (inet_ehash_locks_alloc(&dccp_hashinfo))
if (rc)
goto out_ackvec_exit;
+ rc = ccid_initialize_builtins();
+ if (rc)
+ goto out_sysctl_exit;
+
dccp_timestamping_init();
out:
return rc;
+out_sysctl_exit:
+ dccp_sysctl_exit();
out_ackvec_exit:
dccp_ackvec_exit();
out_free_dccp_mib:
out_free_bind_bucket_cachep:
kmem_cache_destroy(dccp_hashinfo.bind_bucket_cachep);
dccp_hashinfo.bind_bucket_cachep = NULL;
+out_free_percpu:
+ percpu_counter_destroy(&dccp_orphan_count);
goto out;
}
static void __exit dccp_fini(void)
{
+ ccid_cleanup_builtins();
dccp_mib_exit();
free_pages((unsigned long)dccp_hashinfo.bhash,
get_order(dccp_hashinfo.bhash_size *
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff