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Diffstat (limited to 'fs/dlm/lowcomms.c')
-rw-r--r--fs/dlm/lowcomms.c220
1 files changed, 185 insertions, 35 deletions
diff --git a/fs/dlm/lowcomms.c b/fs/dlm/lowcomms.c
index 5c1b0e38c7a..dd87a31bcc2 100644
--- a/fs/dlm/lowcomms.c
+++ b/fs/dlm/lowcomms.c
@@ -140,6 +140,16 @@ struct writequeue_entry {
struct connection *con;
};
+struct dlm_node_addr {
+ struct list_head list;
+ int nodeid;
+ int addr_count;
+ struct sockaddr_storage *addr[DLM_MAX_ADDR_COUNT];
+};
+
+static LIST_HEAD(dlm_node_addrs);
+static DEFINE_SPINLOCK(dlm_node_addrs_spin);
+
static struct sockaddr_storage *dlm_local_addr[DLM_MAX_ADDR_COUNT];
static int dlm_local_count;
static int dlm_allow_conn;
@@ -264,31 +274,146 @@ static struct connection *assoc2con(int assoc_id)
return NULL;
}
-static int nodeid_to_addr(int nodeid, struct sockaddr *retaddr)
+static struct dlm_node_addr *find_node_addr(int nodeid)
+{
+ struct dlm_node_addr *na;
+
+ list_for_each_entry(na, &dlm_node_addrs, list) {
+ if (na->nodeid == nodeid)
+ return na;
+ }
+ return NULL;
+}
+
+static int addr_compare(struct sockaddr_storage *x, struct sockaddr_storage *y)
+{
+ switch (x->ss_family) {
+ case AF_INET: {
+ struct sockaddr_in *sinx = (struct sockaddr_in *)x;
+ struct sockaddr_in *siny = (struct sockaddr_in *)y;
+ if (sinx->sin_addr.s_addr != siny->sin_addr.s_addr)
+ return 0;
+ if (sinx->sin_port != siny->sin_port)
+ return 0;
+ break;
+ }
+ case AF_INET6: {
+ struct sockaddr_in6 *sinx = (struct sockaddr_in6 *)x;
+ struct sockaddr_in6 *siny = (struct sockaddr_in6 *)y;
+ if (!ipv6_addr_equal(&sinx->sin6_addr, &siny->sin6_addr))
+ return 0;
+ if (sinx->sin6_port != siny->sin6_port)
+ return 0;
+ break;
+ }
+ default:
+ return 0;
+ }
+ return 1;
+}
+
+static int nodeid_to_addr(int nodeid, struct sockaddr_storage *sas_out,
+ struct sockaddr *sa_out)
{
- struct sockaddr_storage addr;
- int error;
+ struct sockaddr_storage sas;
+ struct dlm_node_addr *na;
if (!dlm_local_count)
return -1;
- error = dlm_nodeid_to_addr(nodeid, &addr);
- if (error)
- return error;
+ spin_lock(&dlm_node_addrs_spin);
+ na = find_node_addr(nodeid);
+ if (na && na->addr_count)
+ memcpy(&sas, na->addr[0], sizeof(struct sockaddr_storage));
+ spin_unlock(&dlm_node_addrs_spin);
+
+ if (!na)
+ return -EEXIST;
+
+ if (!na->addr_count)
+ return -ENOENT;
+
+ if (sas_out)
+ memcpy(sas_out, &sas, sizeof(struct sockaddr_storage));
+
+ if (!sa_out)
+ return 0;
if (dlm_local_addr[0]->ss_family == AF_INET) {
- struct sockaddr_in *in4 = (struct sockaddr_in *) &addr;
- struct sockaddr_in *ret4 = (struct sockaddr_in *) retaddr;
+ struct sockaddr_in *in4 = (struct sockaddr_in *) &sas;
+ struct sockaddr_in *ret4 = (struct sockaddr_in *) sa_out;
ret4->sin_addr.s_addr = in4->sin_addr.s_addr;
} else {
- struct sockaddr_in6 *in6 = (struct sockaddr_in6 *) &addr;
- struct sockaddr_in6 *ret6 = (struct sockaddr_in6 *) retaddr;
+ struct sockaddr_in6 *in6 = (struct sockaddr_in6 *) &sas;
+ struct sockaddr_in6 *ret6 = (struct sockaddr_in6 *) sa_out;
ret6->sin6_addr = in6->sin6_addr;
}
return 0;
}
+static int addr_to_nodeid(struct sockaddr_storage *addr, int *nodeid)
+{
+ struct dlm_node_addr *na;
+ int rv = -EEXIST;
+
+ spin_lock(&dlm_node_addrs_spin);
+ list_for_each_entry(na, &dlm_node_addrs, list) {
+ if (!na->addr_count)
+ continue;
+
+ if (!addr_compare(na->addr[0], addr))
+ continue;
+
+ *nodeid = na->nodeid;
+ rv = 0;
+ break;
+ }
+ spin_unlock(&dlm_node_addrs_spin);
+ return rv;
+}
+
+int dlm_lowcomms_addr(int nodeid, struct sockaddr_storage *addr, int len)
+{
+ struct sockaddr_storage *new_addr;
+ struct dlm_node_addr *new_node, *na;
+
+ new_node = kzalloc(sizeof(struct dlm_node_addr), GFP_NOFS);
+ if (!new_node)
+ return -ENOMEM;
+
+ new_addr = kzalloc(sizeof(struct sockaddr_storage), GFP_NOFS);
+ if (!new_addr) {
+ kfree(new_node);
+ return -ENOMEM;
+ }
+
+ memcpy(new_addr, addr, len);
+
+ spin_lock(&dlm_node_addrs_spin);
+ na = find_node_addr(nodeid);
+ if (!na) {
+ new_node->nodeid = nodeid;
+ new_node->addr[0] = new_addr;
+ new_node->addr_count = 1;
+ list_add(&new_node->list, &dlm_node_addrs);
+ spin_unlock(&dlm_node_addrs_spin);
+ return 0;
+ }
+
+ if (na->addr_count >= DLM_MAX_ADDR_COUNT) {
+ spin_unlock(&dlm_node_addrs_spin);
+ kfree(new_addr);
+ kfree(new_node);
+ return -ENOSPC;
+ }
+
+ na->addr[na->addr_count++] = new_addr;
+ spin_unlock(&dlm_node_addrs_spin);
+ kfree(new_node);
+ return 0;
+}
+
/* Data available on socket or listen socket received a connect */
static void lowcomms_data_ready(struct sock *sk, int count_unused)
{
@@ -348,7 +473,7 @@ int dlm_lowcomms_connect_node(int nodeid)
}
/* Make a socket active */
-static int add_sock(struct socket *sock, struct connection *con)
+static void add_sock(struct socket *sock, struct connection *con)
{
con->sock = sock;
@@ -358,7 +483,6 @@ static int add_sock(struct socket *sock, struct connection *con)
con->sock->sk->sk_state_change = lowcomms_state_change;
con->sock->sk->sk_user_data = con;
con->sock->sk->sk_allocation = GFP_NOFS;
- return 0;
}
/* Add the port number to an IPv6 or 4 sockaddr and return the address
@@ -510,7 +634,7 @@ static void process_sctp_notification(struct connection *con,
return;
}
make_sockaddr(&prim.ssp_addr, 0, &addr_len);
- if (dlm_addr_to_nodeid(&prim.ssp_addr, &nodeid)) {
+ if (addr_to_nodeid(&prim.ssp_addr, &nodeid)) {
unsigned char *b=(unsigned char *)&prim.ssp_addr;
log_print("reject connect from unknown addr");
print_hex_dump_bytes("ss: ", DUMP_PREFIX_NONE,
@@ -747,7 +871,7 @@ static int tcp_accept_from_sock(struct connection *con)
/* Get the new node's NODEID */
make_sockaddr(&peeraddr, 0, &len);
- if (dlm_addr_to_nodeid(&peeraddr, &nodeid)) {
+ if (addr_to_nodeid(&peeraddr, &nodeid)) {
unsigned char *b=(unsigned char *)&peeraddr;
log_print("connect from non cluster node");
print_hex_dump_bytes("ss: ", DUMP_PREFIX_NONE,
@@ -862,7 +986,7 @@ static void sctp_init_assoc(struct connection *con)
if (con->retries++ > MAX_CONNECT_RETRIES)
return;
- if (nodeid_to_addr(con->nodeid, (struct sockaddr *)&rem_addr)) {
+ if (nodeid_to_addr(con->nodeid, NULL, (struct sockaddr *)&rem_addr)) {
log_print("no address for nodeid %d", con->nodeid);
return;
}
@@ -928,11 +1052,11 @@ static void sctp_init_assoc(struct connection *con)
/* Connect a new socket to its peer */
static void tcp_connect_to_sock(struct connection *con)
{
- int result = -EHOSTUNREACH;
struct sockaddr_storage saddr, src_addr;
int addr_len;
struct socket *sock = NULL;
int one = 1;
+ int result;
if (con->nodeid == 0) {
log_print("attempt to connect sock 0 foiled");
@@ -944,10 +1068,8 @@ static void tcp_connect_to_sock(struct connection *con)
goto out;
/* Some odd races can cause double-connects, ignore them */
- if (con->sock) {
- result = 0;
+ if (con->sock)
goto out;
- }
/* Create a socket to communicate with */
result = sock_create_kern(dlm_local_addr[0]->ss_family, SOCK_STREAM,
@@ -956,8 +1078,11 @@ static void tcp_connect_to_sock(struct connection *con)
goto out_err;
memset(&saddr, 0, sizeof(saddr));
- if (dlm_nodeid_to_addr(con->nodeid, &saddr))
+ result = nodeid_to_addr(con->nodeid, &saddr, NULL);
+ if (result < 0) {
+ log_print("no address for nodeid %d", con->nodeid);
goto out_err;
+ }
sock->sk->sk_user_data = con;
con->rx_action = receive_from_sock;
@@ -983,8 +1108,7 @@ static void tcp_connect_to_sock(struct connection *con)
kernel_setsockopt(sock, SOL_TCP, TCP_NODELAY, (char *)&one,
sizeof(one));
- result =
- sock->ops->connect(sock, (struct sockaddr *)&saddr, addr_len,
+ result = sock->ops->connect(sock, (struct sockaddr *)&saddr, addr_len,
O_NONBLOCK);
if (result == -EINPROGRESS)
result = 0;
@@ -1002,11 +1126,17 @@ out_err:
* Some errors are fatal and this list might need adjusting. For other
* errors we try again until the max number of retries is reached.
*/
- if (result != -EHOSTUNREACH && result != -ENETUNREACH &&
- result != -ENETDOWN && result != -EINVAL
- && result != -EPROTONOSUPPORT) {
+ if (result != -EHOSTUNREACH &&
+ result != -ENETUNREACH &&
+ result != -ENETDOWN &&
+ result != -EINVAL &&
+ result != -EPROTONOSUPPORT) {
+ log_print("connect %d try %d error %d", con->nodeid,
+ con->retries, result);
+ mutex_unlock(&con->sock_mutex);
+ msleep(1000);
lowcomms_connect_sock(con);
- result = 0;
+ return;
}
out:
mutex_unlock(&con->sock_mutex);
@@ -1044,10 +1174,8 @@ static struct socket *tcp_create_listen_sock(struct connection *con,
if (result < 0) {
log_print("Failed to set SO_REUSEADDR on socket: %d", result);
}
- sock->sk->sk_user_data = con;
con->rx_action = tcp_accept_from_sock;
con->connect_action = tcp_connect_to_sock;
- con->sock = sock;
/* Bind to our port */
make_sockaddr(saddr, dlm_config.ci_tcp_port, &addr_len);
@@ -1257,7 +1385,6 @@ void *dlm_lowcomms_get_buffer(int nodeid, int len, gfp_t allocation, char **ppc)
struct connection *con;
struct writequeue_entry *e;
int offset = 0;
- int users = 0;
con = nodeid2con(nodeid, allocation);
if (!con)
@@ -1271,7 +1398,7 @@ void *dlm_lowcomms_get_buffer(int nodeid, int len, gfp_t allocation, char **ppc)
} else {
offset = e->end;
e->end += len;
- users = e->users++;
+ e->users++;
}
spin_unlock(&con->writequeue_lock);
@@ -1286,7 +1413,7 @@ void *dlm_lowcomms_get_buffer(int nodeid, int len, gfp_t allocation, char **ppc)
spin_lock(&con->writequeue_lock);
offset = e->end;
e->end += len;
- users = e->users++;
+ e->users++;
list_add_tail(&e->list, &con->writequeue);
spin_unlock(&con->writequeue_lock);
goto got_one;
@@ -1358,8 +1485,7 @@ static void send_to_sock(struct connection *con)
}
cond_resched();
goto out;
- }
- if (ret <= 0)
+ } else if (ret < 0)
goto send_error;
}
@@ -1376,7 +1502,6 @@ static void send_to_sock(struct connection *con)
if (e->len == 0 && e->users == 0) {
list_del(&e->list);
free_entry(e);
- continue;
}
}
spin_unlock(&con->writequeue_lock);
@@ -1394,7 +1519,6 @@ out_connect:
mutex_unlock(&con->sock_mutex);
if (!test_bit(CF_INIT_PENDING, &con->flags))
lowcomms_connect_sock(con);
- return;
}
static void clean_one_writequeue(struct connection *con)
@@ -1414,6 +1538,7 @@ static void clean_one_writequeue(struct connection *con)
int dlm_lowcomms_close(int nodeid)
{
struct connection *con;
+ struct dlm_node_addr *na;
log_print("closing connection to node %d", nodeid);
con = nodeid2con(nodeid, 0);
@@ -1428,6 +1553,17 @@ int dlm_lowcomms_close(int nodeid)
clean_one_writequeue(con);
close_connection(con, true);
}
+
+ spin_lock(&dlm_node_addrs_spin);
+ na = find_node_addr(nodeid);
+ if (na) {
+ list_del(&na->list);
+ while (na->addr_count--)
+ kfree(na->addr[na->addr_count]);
+ kfree(na);
+ }
+ spin_unlock(&dlm_node_addrs_spin);
+
return 0;
}
@@ -1577,3 +1713,17 @@ fail_destroy:
fail:
return error;
}
+
+void dlm_lowcomms_exit(void)
+{
+ struct dlm_node_addr *na, *safe;
+
+ spin_lock(&dlm_node_addrs_spin);
+ list_for_each_entry_safe(na, safe, &dlm_node_addrs, list) {
+ list_del(&na->list);
+ while (na->addr_count--)
+ kfree(na->addr[na->addr_count]);
+ kfree(na);
+ }
+ spin_unlock(&dlm_node_addrs_spin);
+}