diff options
author | 2015-08-04 12:17:53 -0700 | |
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committer | 2015-08-04 15:44:42 -0700 | |
commit | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch) | |
tree | 1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/net/ipx/ipx_route.c | |
parent | 98260f3884f4a202f9ca5eabed40b1354c489b29 (diff) |
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base.
It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:
commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Sat Jul 25 12:13:34 2015 +0200
Prepare v4.1.3-rt3
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.
Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/net/ipx/ipx_route.c')
-rw-r--r-- | kernel/net/ipx/ipx_route.c | 292 |
1 files changed, 292 insertions, 0 deletions
diff --git a/kernel/net/ipx/ipx_route.c b/kernel/net/ipx/ipx_route.c new file mode 100644 index 000000000..3e2a32a9f --- /dev/null +++ b/kernel/net/ipx/ipx_route.c @@ -0,0 +1,292 @@ +/* + * Implements the IPX routing routines. + * Code moved from af_ipx.c. + * + * Arnaldo Carvalho de Melo <acme@conectiva.com.br>, 2003 + * + * See net/ipx/ChangeLog. + */ + +#include <linux/list.h> +#include <linux/route.h> +#include <linux/slab.h> +#include <linux/spinlock.h> + +#include <net/ipx.h> +#include <net/sock.h> + +LIST_HEAD(ipx_routes); +DEFINE_RWLOCK(ipx_routes_lock); + +extern struct ipx_interface *ipx_internal_net; + +extern struct ipx_interface *ipxitf_find_using_net(__be32 net); +extern int ipxitf_demux_socket(struct ipx_interface *intrfc, + struct sk_buff *skb, int copy); +extern int ipxitf_demux_socket(struct ipx_interface *intrfc, + struct sk_buff *skb, int copy); + +struct ipx_route *ipxrtr_lookup(__be32 net) +{ + struct ipx_route *r; + + read_lock_bh(&ipx_routes_lock); + list_for_each_entry(r, &ipx_routes, node) + if (r->ir_net == net) { + ipxrtr_hold(r); + goto unlock; + } + r = NULL; +unlock: + read_unlock_bh(&ipx_routes_lock); + return r; +} + +/* + * Caller must hold a reference to intrfc + */ +int ipxrtr_add_route(__be32 network, struct ipx_interface *intrfc, + unsigned char *node) +{ + struct ipx_route *rt; + int rc; + + /* Get a route structure; either existing or create */ + rt = ipxrtr_lookup(network); + if (!rt) { + rt = kmalloc(sizeof(*rt), GFP_ATOMIC); + rc = -EAGAIN; + if (!rt) + goto out; + + atomic_set(&rt->refcnt, 1); + ipxrtr_hold(rt); + write_lock_bh(&ipx_routes_lock); + list_add(&rt->node, &ipx_routes); + write_unlock_bh(&ipx_routes_lock); + } else { + rc = -EEXIST; + if (intrfc == ipx_internal_net) + goto out_put; + } + + rt->ir_net = network; + rt->ir_intrfc = intrfc; + if (!node) { + memset(rt->ir_router_node, '\0', IPX_NODE_LEN); + rt->ir_routed = 0; + } else { + memcpy(rt->ir_router_node, node, IPX_NODE_LEN); + rt->ir_routed = 1; + } + + rc = 0; +out_put: + ipxrtr_put(rt); +out: + return rc; +} + +void ipxrtr_del_routes(struct ipx_interface *intrfc) +{ + struct ipx_route *r, *tmp; + + write_lock_bh(&ipx_routes_lock); + list_for_each_entry_safe(r, tmp, &ipx_routes, node) + if (r->ir_intrfc == intrfc) { + list_del(&r->node); + ipxrtr_put(r); + } + write_unlock_bh(&ipx_routes_lock); +} + +static int ipxrtr_create(struct ipx_route_definition *rd) +{ + struct ipx_interface *intrfc; + int rc = -ENETUNREACH; + + /* Find the appropriate interface */ + intrfc = ipxitf_find_using_net(rd->ipx_router_network); + if (!intrfc) + goto out; + rc = ipxrtr_add_route(rd->ipx_network, intrfc, rd->ipx_router_node); + ipxitf_put(intrfc); +out: + return rc; +} + +static int ipxrtr_delete(__be32 net) +{ + struct ipx_route *r, *tmp; + int rc; + + write_lock_bh(&ipx_routes_lock); + list_for_each_entry_safe(r, tmp, &ipx_routes, node) + if (r->ir_net == net) { + /* Directly connected; can't lose route */ + rc = -EPERM; + if (!r->ir_routed) + goto out; + list_del(&r->node); + ipxrtr_put(r); + rc = 0; + goto out; + } + rc = -ENOENT; +out: + write_unlock_bh(&ipx_routes_lock); + return rc; +} + +/* + * The skb has to be unshared, we'll end up calling ipxitf_send, that'll + * modify the packet + */ +int ipxrtr_route_skb(struct sk_buff *skb) +{ + struct ipxhdr *ipx = ipx_hdr(skb); + struct ipx_route *r = ipxrtr_lookup(IPX_SKB_CB(skb)->ipx_dest_net); + + if (!r) { /* no known route */ + kfree_skb(skb); + return 0; + } + + ipxitf_hold(r->ir_intrfc); + ipxitf_send(r->ir_intrfc, skb, r->ir_routed ? + r->ir_router_node : ipx->ipx_dest.node); + ipxitf_put(r->ir_intrfc); + ipxrtr_put(r); + + return 0; +} + +/* + * Route an outgoing frame from a socket. + */ +int ipxrtr_route_packet(struct sock *sk, struct sockaddr_ipx *usipx, + struct msghdr *msg, size_t len, int noblock) +{ + struct sk_buff *skb; + struct ipx_sock *ipxs = ipx_sk(sk); + struct ipx_interface *intrfc; + struct ipxhdr *ipx; + size_t size; + int ipx_offset; + struct ipx_route *rt = NULL; + int rc; + + /* Find the appropriate interface on which to send packet */ + if (!usipx->sipx_network && ipx_primary_net) { + usipx->sipx_network = ipx_primary_net->if_netnum; + intrfc = ipx_primary_net; + } else { + rt = ipxrtr_lookup(usipx->sipx_network); + rc = -ENETUNREACH; + if (!rt) + goto out; + intrfc = rt->ir_intrfc; + } + + ipxitf_hold(intrfc); + ipx_offset = intrfc->if_ipx_offset; + size = sizeof(struct ipxhdr) + len + ipx_offset; + + skb = sock_alloc_send_skb(sk, size, noblock, &rc); + if (!skb) + goto out_put; + + skb_reserve(skb, ipx_offset); + skb->sk = sk; + + /* Fill in IPX header */ + skb_reset_network_header(skb); + skb_reset_transport_header(skb); + skb_put(skb, sizeof(struct ipxhdr)); + ipx = ipx_hdr(skb); + ipx->ipx_pktsize = htons(len + sizeof(struct ipxhdr)); + IPX_SKB_CB(skb)->ipx_tctrl = 0; + ipx->ipx_type = usipx->sipx_type; + + IPX_SKB_CB(skb)->last_hop.index = -1; +#ifdef CONFIG_IPX_INTERN + IPX_SKB_CB(skb)->ipx_source_net = ipxs->intrfc->if_netnum; + memcpy(ipx->ipx_source.node, ipxs->node, IPX_NODE_LEN); +#else + rc = ntohs(ipxs->port); + if (rc == 0x453 || rc == 0x452) { + /* RIP/SAP special handling for mars_nwe */ + IPX_SKB_CB(skb)->ipx_source_net = intrfc->if_netnum; + memcpy(ipx->ipx_source.node, intrfc->if_node, IPX_NODE_LEN); + } else { + IPX_SKB_CB(skb)->ipx_source_net = ipxs->intrfc->if_netnum; + memcpy(ipx->ipx_source.node, ipxs->intrfc->if_node, + IPX_NODE_LEN); + } +#endif /* CONFIG_IPX_INTERN */ + ipx->ipx_source.sock = ipxs->port; + IPX_SKB_CB(skb)->ipx_dest_net = usipx->sipx_network; + memcpy(ipx->ipx_dest.node, usipx->sipx_node, IPX_NODE_LEN); + ipx->ipx_dest.sock = usipx->sipx_port; + + rc = memcpy_from_msg(skb_put(skb, len), msg, len); + if (rc) { + kfree_skb(skb); + goto out_put; + } + + /* Apply checksum. Not allowed on 802.3 links. */ + if (sk->sk_no_check_tx || + intrfc->if_dlink_type == htons(IPX_FRAME_8023)) + ipx->ipx_checksum = htons(0xFFFF); + else + ipx->ipx_checksum = ipx_cksum(ipx, len + sizeof(struct ipxhdr)); + + rc = ipxitf_send(intrfc, skb, (rt && rt->ir_routed) ? + rt->ir_router_node : ipx->ipx_dest.node); +out_put: + ipxitf_put(intrfc); + if (rt) + ipxrtr_put(rt); +out: + return rc; +} + +/* + * We use a normal struct rtentry for route handling + */ +int ipxrtr_ioctl(unsigned int cmd, void __user *arg) +{ + struct rtentry rt; /* Use these to behave like 'other' stacks */ + struct sockaddr_ipx *sg, *st; + int rc = -EFAULT; + + if (copy_from_user(&rt, arg, sizeof(rt))) + goto out; + + sg = (struct sockaddr_ipx *)&rt.rt_gateway; + st = (struct sockaddr_ipx *)&rt.rt_dst; + + rc = -EINVAL; + if (!(rt.rt_flags & RTF_GATEWAY) || /* Direct routes are fixed */ + sg->sipx_family != AF_IPX || + st->sipx_family != AF_IPX) + goto out; + + switch (cmd) { + case SIOCDELRT: + rc = ipxrtr_delete(st->sipx_network); + break; + case SIOCADDRT: { + struct ipx_route_definition f; + f.ipx_network = st->sipx_network; + f.ipx_router_network = sg->sipx_network; + memcpy(f.ipx_router_node, sg->sipx_node, IPX_NODE_LEN); + rc = ipxrtr_create(&f); + break; + } + } + +out: + return rc; +} |