extern struct zebra_privs_t zserv_privs;
+
int netlink_talk_filter(struct nlmsghdr *h, ns_id_t ns_id, int startup)
{
/*
*/
void netlink_read_init(const char *fname)
{
+ struct zebra_dplane_info dp_info;
+
snprintf(netlink_fuzz_file, MAXPATHLEN, "%s", fname);
/* Creating this fake socket for testing purposes */
struct zebra_ns *zns = zebra_ns_lookup(NS_DEFAULT);
- netlink_parse_info(netlink_information_fetch, &zns->netlink, zns, 1, 0);
+ /* Capture key info from zns struct */
+ zebra_dplane_info_from_zns(&dp_info, zns, false);
+
+ netlink_parse_info(netlink_information_fetch, &zns->netlink,
+ &dp_info, 1, 0);
}
/**
/*
* Filter out messages from self that occur on listener socket,
- * caused by our actions on the command socket
+ * caused by our actions on the command socket(s)
*
* When we add new Netlink message types we probably
* do not need to add them here as that we are filtering
* so that we only had to write one way to handle incoming
* address add/delete changes.
*/
-static void netlink_install_filter(int sock, __u32 pid)
+static void netlink_install_filter(int sock, __u32 pid, __u32 dplane_pid)
{
/*
* BPF_JUMP instructions and where you jump to are based upon
struct sock_filter filter[] = {
/*
* Logic:
- * if (nlmsg_pid == pid) {
+ * if (nlmsg_pid == pid ||
+ * nlmsg_pid == dplane_pid) {
* if (the incoming nlmsg_type ==
* RTM_NEWADDR | RTM_DELADDR)
* keep this message
/*
* 1: Compare to pid
*/
- BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, htonl(pid), 0, 4),
+ BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, htonl(pid), 1, 0),
/*
- * 2: Load the nlmsg_type into BPF register
+ * 2: Compare to dplane pid
+ */
+ BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, htonl(dplane_pid), 0, 4),
+ /*
+ * 3: Load the nlmsg_type into BPF register
*/
BPF_STMT(BPF_LD | BPF_ABS | BPF_H,
offsetof(struct nlmsghdr, nlmsg_type)),
/*
- * 3: Compare to RTM_NEWADDR
+ * 4: Compare to RTM_NEWADDR
*/
BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, htons(RTM_NEWADDR), 2, 0),
/*
- * 4: Compare to RTM_DELADDR
+ * 5: Compare to RTM_DELADDR
*/
BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, htons(RTM_DELADDR), 1, 0),
/*
- * 5: This is the end state of we want to skip the
+ * 6: This is the end state of we want to skip the
* message
*/
BPF_STMT(BPF_RET | BPF_K, 0),
- /* 6: This is the end state of we want to keep
+ /* 7: This is the end state of we want to keep
* the message
*/
BPF_STMT(BPF_RET | BPF_K, 0xffff),
* the filter.
*/
int netlink_parse_info(int (*filter)(struct nlmsghdr *, ns_id_t, int),
- struct nlsock *nl, struct zebra_dplane_info *zns,
+ const struct nlsock *nl,
+ const struct zebra_dplane_info *zns,
int count, int startup)
{
int status;
}
/*
- * netlink_talk
+ * netlink_talk_info
*
* sendmsg() to netlink socket then recvmsg().
* Calls netlink_parse_info to parse returned data
*
* filter -> The filter to read final results from kernel
* nlmsghdr -> The data to send to the kernel
- * nl -> The netlink socket information
- * zns -> The zebra namespace information
+ * dp_info -> The dataplane and netlink socket information
* startup -> Are we reading in under startup conditions
* This is passed through eventually to filter.
*/
-int netlink_talk(int (*filter)(struct nlmsghdr *, ns_id_t, int startup),
- struct nlmsghdr *n, struct nlsock *nl, struct zebra_ns *zns,
- int startup)
+int netlink_talk_info(int (*filter)(struct nlmsghdr *, ns_id_t, int startup),
+ struct nlmsghdr *n,
+ const struct zebra_dplane_info *dp_info, int startup)
{
int status = 0;
struct sockaddr_nl snl;
struct iovec iov;
struct msghdr msg;
int save_errno = 0;
- struct zebra_dplane_info dp_info;
+ const struct nlsock *nl;
memset(&snl, 0, sizeof snl);
memset(&iov, 0, sizeof iov);
snl.nl_family = AF_NETLINK;
- n->nlmsg_seq = ++nl->seq;
+ nl = &(dp_info->nls);
+ n->nlmsg_seq = nl->seq;
n->nlmsg_pid = nl->snl.nl_pid;
if (IS_ZEBRA_DEBUG_KERNEL)
return -1;
}
-
/*
* Get reply from netlink socket.
* The reply should either be an acknowlegement or an error.
*/
+ return netlink_parse_info(filter, nl, dp_info, 0, startup);
+}
+
+/*
+ * Synchronous version of netlink_talk_info. Converts args to suit the
+ * common version, which is suitable for both sync and async use.
+ */
+int netlink_talk(int (*filter)(struct nlmsghdr *, ns_id_t, int startup),
+ struct nlmsghdr *n, struct nlsock *nl, struct zebra_ns *zns,
+ int startup)
+{
+ struct zebra_dplane_info dp_info;
+
+ /* Increment sequence number before capturing snapshot of ns socket
+ * info.
+ */
+ nl->seq++;
+
+ /* Capture info in intermediate info struct */
zebra_dplane_info_from_zns(&dp_info, zns, (nl == &(zns->netlink_cmd)));
- return netlink_parse_info(filter, nl, &dp_info, 0, startup);
+
+ return netlink_talk_info(filter, n, &dp_info, startup);
}
/* Issue request message to kernel via netlink socket. GET messages
exit(-1);
}
+ snprintf(zns->netlink_dplane.name, sizeof(zns->netlink_dplane.name),
+ "netlink-dp (NS %u)", zns->ns_id);
+ zns->netlink_dplane.sock = -1;
+ if (netlink_socket(&zns->netlink_dplane, 0, zns->ns_id) < 0) {
+ zlog_err("Failure to create %s socket",
+ zns->netlink_dplane.name);
+ exit(-1);
+ }
+
/*
* SOL_NETLINK is not available on all platforms yet
* apparently. It's in bits/socket.h which I am not
#if defined SOL_NETLINK
/*
* Let's tell the kernel that we want to receive extended
- * ACKS over our command socket
+ * ACKS over our command socket(s)
*/
one = 1;
ret = setsockopt(zns->netlink_cmd.sock, SOL_NETLINK, NETLINK_EXT_ACK,
&one, sizeof(one));
if (ret < 0)
- zlog_notice("Registration for extended ACK failed : %d %s",
+ zlog_notice("Registration for extended cmd ACK failed : %d %s",
+ errno, safe_strerror(errno));
+
+ one = 1;
+ ret = setsockopt(zns->netlink_dplane.sock, SOL_NETLINK, NETLINK_EXT_ACK,
+ &one, sizeof(one));
+
+ if (ret < 0)
+ zlog_notice("Registration for extended dp ACK failed : %d %s",
errno, safe_strerror(errno));
#endif
zlog_err("Can't set %s socket error: %s(%d)",
zns->netlink_cmd.name, safe_strerror(errno), errno);
+ if (fcntl(zns->netlink_dplane.sock, F_SETFL, O_NONBLOCK) < 0)
+ zlog_err("Can't set %s socket error: %s(%d)",
+ zns->netlink_dplane.name, safe_strerror(errno), errno);
+
/* Set receive buffer size if it's set from command line */
if (nl_rcvbufsize)
netlink_recvbuf(&zns->netlink, nl_rcvbufsize);
netlink_install_filter(zns->netlink.sock,
- zns->netlink_cmd.snl.nl_pid);
+ zns->netlink_cmd.snl.nl_pid,
+ zns->netlink_dplane.snl.nl_pid);
+
zns->t_netlink = NULL;
thread_add_read(zebrad.master, kernel_read, zns,
rt_netlink_init();
}
-void kernel_terminate(struct zebra_ns *zns)
+void kernel_terminate(struct zebra_ns *zns, bool complete)
{
THREAD_READ_OFF(zns->t_netlink);
close(zns->netlink_cmd.sock);
zns->netlink_cmd.sock = -1;
}
-}
+ /* During zebra shutdown, we need to leave the dataplane socket
+ * around until all work is done.
+ */
+ if (complete) {
+ if (zns->netlink_dplane.sock >= 0) {
+ close(zns->netlink_dplane.sock);
+ zns->netlink_dplane.sock = -1;
+ }
+ }
+}
#endif /* HAVE_NETLINK */
projects / mirror_frr.git / blobdiff