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net: ipmr: fix code and comment style

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Trivial code and comment style fixes, also removed some extra newlines,
spaces and tabs.

Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Nikolay Aleksandrov 2015-11-21 15:57:27 +01:00 committed by David S. Miller
parent c316c629f1
commit 7ef8f65df9
2 changed files with 54 additions and 147 deletions
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59
include/uapi/linux/mroute.h
View File

@ -4,15 +4,13 @@
#include <linux/sockios.h>
#include <linux/types.h>
/*
* Based on the MROUTING 3.5 defines primarily to keep
* source compatibility with BSD.
/* Based on the MROUTING 3.5 defines primarily to keep
* source compatibility with BSD.
*
* See the mrouted code for the original history.
*
* Protocol Independent Multicast (PIM) data structures included
* Carlos Picoto (cap@di.fc.ul.pt)
* See the mrouted code for the original history.
*
* Protocol Independent Multicast (PIM) data structures included
* Carlos Picoto (cap@di.fc.ul.pt)
*/
#define MRT_BASE 200
@ -34,15 +32,13 @@
#define SIOCGETSGCNT (SIOCPROTOPRIVATE+1)
#define SIOCGETRPF (SIOCPROTOPRIVATE+2)
#define MAXVIFS 32
#define MAXVIFS 32
typedef unsigned long vifbitmap_t; /* User mode code depends on this lot */
typedef unsigned short vifi_t;
#define ALL_VIFS ((vifi_t)(-1))
/*
* Same idea as select
*/
/* Same idea as select */
#define VIFM_SET(n,m) ((m)|=(1<<(n)))
#define VIFM_CLR(n,m) ((m)&=~(1<<(n)))
#define VIFM_ISSET(n,m) ((m)&(1<<(n)))
@ -50,11 +46,9 @@ typedef unsigned short vifi_t;
#define VIFM_COPY(mfrom,mto) ((mto)=(mfrom))
#define VIFM_SAME(m1,m2) ((m1)==(m2))
/*
* Passed by mrouted for an MRT_ADD_VIF - again we use the
* mrouted 3.6 structures for compatibility
/* Passed by mrouted for an MRT_ADD_VIF - again we use the
* mrouted 3.6 structures for compatibility
*/
struct vifctl {
vifi_t vifc_vifi; /* Index of VIF */
unsigned char vifc_flags; /* VIFF_ flags */
@ -73,10 +67,7 @@ struct vifctl {
#define VIFF_USE_IFINDEX 0x8 /* use vifc_lcl_ifindex instead of
vifc_lcl_addr to find an interface */
/*
* Cache manipulation structures for mrouted and PIMd
*/
/* Cache manipulation structures for mrouted and PIMd */
struct mfcctl {
struct in_addr mfcc_origin; /* Origin of mcast */
struct in_addr mfcc_mcastgrp; /* Group in question */
@ -88,10 +79,7 @@ struct mfcctl {
int mfcc_expire;
};
/*
* Group count retrieval for mrouted
*/
/* Group count retrieval for mrouted */
struct sioc_sg_req {
struct in_addr src;
struct in_addr grp;
@ -100,10 +88,7 @@ struct sioc_sg_req {
unsigned long wrong_if;
};
/*
* To get vif packet counts
*/
/* To get vif packet counts */
struct sioc_vif_req {
vifi_t vifi; /* Which iface */
unsigned long icount; /* In packets */
@ -112,11 +97,9 @@ struct sioc_vif_req {
unsigned long obytes; /* Out bytes */
};
/*
* This is the format the mroute daemon expects to see IGMP control
* data. Magically happens to be like an IP packet as per the original
/* This is the format the mroute daemon expects to see IGMP control
* data. Magically happens to be like an IP packet as per the original
*/
struct igmpmsg {
__u32 unused1,unused2;
unsigned char im_msgtype; /* What is this */
@ -126,21 +109,13 @@ struct igmpmsg {
struct in_addr im_src,im_dst;
};
/*
* That's all usermode folks
*/
/* That's all usermode folks */
#define MFC_ASSERT_THRESH (3*HZ) /* Maximal freq. of asserts */
/*
* Pseudo messages used by mrouted
*/
/* Pseudo messages used by mrouted */
#define IGMPMSG_NOCACHE 1 /* Kern cache fill request to mrouted */
#define IGMPMSG_WRONGVIF 2 /* For PIM assert processing (unused) */
#define IGMPMSG_WHOLEPKT 3 /* For PIM Register processing */
#endif /* _UAPI__LINUX_MROUTE_H */

142
net/ipv4/ipmr.c
View File

@ -102,9 +102,7 @@ static inline bool pimsm_enabled(void)
static DEFINE_RWLOCK(mrt_lock);
/*
* Multicast router control variables
*/
/* Multicast router control variables */
#define VIF_EXISTS(_mrt, _idx) ((_mrt)->vif_table[_idx].dev != NULL)
@ -393,8 +391,7 @@ static void ipmr_del_tunnel(struct net_device *dev, struct vifctl *v)
}
}
static
struct net_device *ipmr_new_tunnel(struct net *net, struct vifctl *v)
static struct net_device *ipmr_new_tunnel(struct net *net, struct vifctl *v)
{
struct net_device *dev;
@ -561,8 +558,7 @@ static int __pim_rcv(struct mr_table *mrt, struct sk_buff *skb,
struct iphdr *encap;
encap = (struct iphdr *)(skb_transport_header(skb) + pimlen);
/*
* Check that:
/* Check that:
* a. packet is really sent to a multicast group
* b. packet is not a NULL-REGISTER
* c. packet is not truncated
@ -603,7 +599,6 @@ static struct net_device *ipmr_reg_vif(struct net *net, struct mr_table *mrt)
* vif_delete - Delete a VIF entry
* @notify: Set to 1, if the caller is a notifier_call
*/
static int vif_delete(struct mr_table *mrt, int vifi, int notify,
struct list_head *head)
{
@ -673,7 +668,6 @@ static inline void ipmr_cache_free(struct mfc_cache *c)
/* Destroy an unresolved cache entry, killing queued skbs
* and reporting error to netlink readers.
*/
static void ipmr_destroy_unres(struct mr_table *mrt, struct mfc_cache *c)
{
struct net *net = read_pnet(&mrt->net);
@ -701,9 +695,7 @@ static void ipmr_destroy_unres(struct mr_table *mrt, struct mfc_cache *c)
ipmr_cache_free(c);
}
/* Timer process for the unresolved queue. */
static void ipmr_expire_process(unsigned long arg)
{
struct mr_table *mrt = (struct mr_table *)arg;
@ -743,7 +735,6 @@ out:
}
/* Fill oifs list. It is called under write locked mrt_lock. */
static void ipmr_update_thresholds(struct mr_table *mrt, struct mfc_cache *cache,
unsigned char *ttls)
{
@ -808,7 +799,6 @@ static int vif_add(struct net *net, struct mr_table *mrt,
return err;
}
break;
case VIFF_USE_IFINDEX:
case 0:
if (vifc->vifc_flags == VIFF_USE_IFINDEX) {
@ -928,9 +918,7 @@ skip:
return ipmr_cache_find_any_parent(mrt, vifi);
}
/*
* Allocate a multicast cache entry
*/
/* Allocate a multicast cache entry */
static struct mfc_cache *ipmr_cache_alloc(void)
{
struct mfc_cache *c = kmem_cache_zalloc(mrt_cachep, GFP_KERNEL);
@ -951,10 +939,7 @@ static struct mfc_cache *ipmr_cache_alloc_unres(void)
return c;
}
/*
* A cache entry has gone into a resolved state from queued
*/
/* A cache entry has gone into a resolved state from queued */
static void ipmr_cache_resolve(struct net *net, struct mr_table *mrt,
struct mfc_cache *uc, struct mfc_cache *c)
{
@ -962,7 +947,6 @@ static void ipmr_cache_resolve(struct net *net, struct mr_table *mrt,
struct nlmsgerr *e;
/* Play the pending entries through our router */
while ((skb = __skb_dequeue(&uc->mfc_un.unres.unresolved))) {
if (ip_hdr(skb)->version == 0) {
struct nlmsghdr *nlh = (struct nlmsghdr *)skb_pull(skb, sizeof(struct iphdr));
@ -1064,12 +1048,9 @@ static int ipmr_cache_report(struct mr_table *mrt,
return ret;
}
/*
* Queue a packet for resolution. It gets locked cache entry!
*/
static int
ipmr_cache_unresolved(struct mr_table *mrt, vifi_t vifi, struct sk_buff *skb)
/* Queue a packet for resolution. It gets locked cache entry! */
static int ipmr_cache_unresolved(struct mr_table *mrt, vifi_t vifi,
struct sk_buff *skb)
{
bool found = false;
int err;
@ -1087,7 +1068,6 @@ ipmr_cache_unresolved(struct mr_table *mrt, vifi_t vifi, struct sk_buff *skb)
if (!found) {
/* Create a new entry if allowable */
if (atomic_read(&mrt->cache_resolve_queue_len) >= 10 ||
(c = ipmr_cache_alloc_unres()) == NULL) {
spin_unlock_bh(&mfc_unres_lock);
@ -1097,13 +1077,11 @@ ipmr_cache_unresolved(struct mr_table *mrt, vifi_t vifi, struct sk_buff *skb)
}
/* Fill in the new cache entry */
c->mfc_parent = -1;
c->mfc_origin = iph->saddr;
c->mfc_mcastgrp = iph->daddr;
/* Reflect first query at mrouted. */
err = ipmr_cache_report(mrt, skb, vifi, IGMPMSG_NOCACHE);
if (err < 0) {
/* If the report failed throw the cache entry
@ -1125,7 +1103,6 @@ ipmr_cache_unresolved(struct mr_table *mrt, vifi_t vifi, struct sk_buff *skb)
}
/* See if we can append the packet */
if (c->mfc_un.unres.unresolved.qlen > 3) {
kfree_skb(skb);
err = -ENOBUFS;
@ -1138,9 +1115,7 @@ ipmr_cache_unresolved(struct mr_table *mrt, vifi_t vifi, struct sk_buff *skb)
return err;
}
/*
* MFC cache manipulation by user space mroute daemon
*/
/* MFC cache manipulation by user space mroute daemon */
static int ipmr_mfc_delete(struct mr_table *mrt, struct mfcctl *mfc, int parent)
{
@ -1211,9 +1186,8 @@ static int ipmr_mfc_add(struct net *net, struct mr_table *mrt,
list_add_rcu(&c->list, &mrt->mfc_cache_array[line]);
/*
* Check to see if we resolved a queued list. If so we
* need to send on the frames and tidy up.
/* Check to see if we resolved a queued list. If so we
* need to send on the frames and tidy up.
*/
found = false;
spin_lock_bh(&mfc_unres_lock);
@ -1238,10 +1212,7 @@ static int ipmr_mfc_add(struct net *net, struct mr_table *mrt,
return 0;
}
/*
* Close the multicast socket, and clear the vif tables etc
*/
/* Close the multicast socket, and clear the vif tables etc */
static void mroute_clean_tables(struct mr_table *mrt)
{
int i;
@ -1249,7 +1220,6 @@ static void mroute_clean_tables(struct mr_table *mrt)
struct mfc_cache *c, *next;
/* Shut down all active vif entries */
for (i = 0; i < mrt->maxvif; i++) {
if (!(mrt->vif_table[i].flags & VIFF_STATIC))
vif_delete(mrt, i, 0, &list);
@ -1257,7 +1227,6 @@ static void mroute_clean_tables(struct mr_table *mrt)
unregister_netdevice_many(&list);
/* Wipe the cache */
for (i = 0; i < MFC_LINES; i++) {
list_for_each_entry_safe(c, next, &mrt->mfc_cache_array[i], list) {
if (c->mfc_flags & MFC_STATIC)
@ -1301,11 +1270,10 @@ static void mrtsock_destruct(struct sock *sk)
rtnl_unlock();
}
/*
* Socket options and virtual interface manipulation. The whole
* virtual interface system is a complete heap, but unfortunately
* that's how BSD mrouted happens to think. Maybe one day with a proper
* MOSPF/PIM router set up we can clean this up.
/* Socket options and virtual interface manipulation. The whole
* virtual interface system is a complete heap, but unfortunately
* that's how BSD mrouted happens to think. Maybe one day with a proper
* MOSPF/PIM router set up we can clean this up.
*/
int ip_mroute_setsockopt(struct sock *sk, int optname, char __user *optval, unsigned int optlen)
@ -1373,10 +1341,9 @@ int ip_mroute_setsockopt(struct sock *sk, int optname, char __user *optval, unsi
rtnl_unlock();
return ret;
/*
* Manipulate the forwarding caches. These live
* in a sort of kernel/user symbiosis.
*/
/* Manipulate the forwarding caches. These live
* in a sort of kernel/user symbiosis.
*/
case MRT_ADD_MFC:
case MRT_DEL_MFC:
parent = -1;
@ -1397,9 +1364,7 @@ int ip_mroute_setsockopt(struct sock *sk, int optname, char __user *optval, unsi
parent);
rtnl_unlock();
return ret;
/*
* Control PIM assert.
*/
/* Control PIM assert. */
case MRT_ASSERT:
{
int v;
@ -1456,19 +1421,13 @@ int ip_mroute_setsockopt(struct sock *sk, int optname, char __user *optval, unsi
return ret;
}
#endif
/*
* Spurious command, or MRT_VERSION which you cannot
* set.
*/
/* Spurious command, or MRT_VERSION which you cannot set. */
default:
return -ENOPROTOOPT;
}
}
/*
* Getsock opt support for the multicast routing system.
*/
/* Getsock opt support for the multicast routing system. */
int ip_mroute_getsockopt(struct sock *sk, int optname, char __user *optval, int __user *optlen)
{
int olr;
@ -1512,10 +1471,7 @@ int ip_mroute_getsockopt(struct sock *sk, int optname, char __user *optval, int
return 0;
}
/*
* The IP multicast ioctl support routines.
*/
/* The IP multicast ioctl support routines. */
int ipmr_ioctl(struct sock *sk, int cmd, void __user *arg)
{
struct sioc_sg_req sr;
@ -1648,7 +1604,6 @@ int ipmr_compat_ioctl(struct sock *sk, unsigned int cmd, void __user *arg)
}
#endif
static int ipmr_device_event(struct notifier_block *this, unsigned long event, void *ptr)
{
struct net_device *dev = netdev_notifier_info_to_dev(ptr);
@ -1670,17 +1625,14 @@ static int ipmr_device_event(struct notifier_block *this, unsigned long event, v
return NOTIFY_DONE;
}
static struct notifier_block ip_mr_notifier = {
.notifier_call = ipmr_device_event,
};
/*
* Encapsulate a packet by attaching a valid IPIP header to it.
* This avoids tunnel drivers and other mess and gives us the speed so
* important for multicast video.
/* Encapsulate a packet by attaching a valid IPIP header to it.
* This avoids tunnel drivers and other mess and gives us the speed so
* important for multicast video.
*/
static void ip_encap(struct net *net, struct sk_buff *skb,
__be32 saddr, __be32 daddr)
{
@ -1722,9 +1674,7 @@ static inline int ipmr_forward_finish(struct net *net, struct sock *sk,
return dst_output(net, sk, skb);
}
/*
* Processing handlers for ipmr_forward
*/
/* Processing handlers for ipmr_forward */
static void ipmr_queue_xmit(struct net *net, struct mr_table *mrt,
struct sk_buff *skb, struct mfc_cache *c, int vifi)
@ -1773,7 +1723,6 @@ static void ipmr_queue_xmit(struct net *net, struct mr_table *mrt,
* allow to send ICMP, so that packets will disappear
* to blackhole.
*/
IP_INC_STATS(net, IPSTATS_MIB_FRAGFAILS);
ip_rt_put(rt);
goto out_free;
@ -1805,8 +1754,7 @@ static void ipmr_queue_xmit(struct net *net, struct mr_table *mrt,
IPCB(skb)->flags |= IPSKB_FORWARDED;
/*
* RFC1584 teaches, that DVMRP/PIM router must deliver packets locally
/* RFC1584 teaches, that DVMRP/PIM router must deliver packets locally
* not only before forwarding, but after forwarding on all output
* interfaces. It is clear, if mrouter runs a multicasting
* program, it should receive packets not depending to what interface
@ -1837,7 +1785,6 @@ static int ipmr_find_vif(struct mr_table *mrt, struct net_device *dev)
}
/* "local" means that we should preserve one skb (for local delivery) */
static void ip_mr_forward(struct net *net, struct mr_table *mrt,
struct sk_buff *skb, struct mfc_cache *cache,
int local)
@ -1862,9 +1809,7 @@ static void ip_mr_forward(struct net *net, struct mr_table *mrt,
goto forward;
}
/*
* Wrong interface: drop packet and (maybe) send PIM assert.
*/
/* Wrong interface: drop packet and (maybe) send PIM assert. */
if (mrt->vif_table[vif].dev != skb->dev) {
if (rt_is_output_route(skb_rtable(skb))) {
/* It is our own packet, looped back.
@ -1903,9 +1848,7 @@ forward:
mrt->vif_table[vif].pkt_in++;
mrt->vif_table[vif].bytes_in += skb->len;
/*
* Forward the frame
*/
/* Forward the frame */
if (cache->mfc_origin == htonl(INADDR_ANY) &&
cache->mfc_mcastgrp == htonl(INADDR_ANY)) {
if (true_vifi >= 0 &&
@ -1979,11 +1922,9 @@ static struct mr_table *ipmr_rt_fib_lookup(struct net *net, struct sk_buff *skb)
return mrt;
}
/*
* Multicast packets for forwarding arrive here
* Called with rcu_read_lock();
/* Multicast packets for forwarding arrive here
* Called with rcu_read_lock();
*/
int ip_mr_input(struct sk_buff *skb)
{
struct mfc_cache *cache;
@ -2034,9 +1975,7 @@ int ip_mr_input(struct sk_buff *skb)
vif);
}
/*
* No usable cache entry
*/
/* No usable cache entry */
if (!cache) {
int vif;
@ -2078,10 +2017,7 @@ dont_forward:
}
#ifdef CONFIG_IP_PIMSM_V1
/*
* Handle IGMP messages of PIMv1
*/
/* Handle IGMP messages of PIMv1 */
int pim_rcv_v1(struct sk_buff *skb)
{
struct igmphdr *pim;
@ -2406,9 +2342,8 @@ done:
}
#ifdef CONFIG_PROC_FS
/*
* The /proc interfaces to multicast routing :
* /proc/net/ip_mr_cache & /proc/net/ip_mr_vif
/* The /proc interfaces to multicast routing :
* /proc/net/ip_mr_cache & /proc/net/ip_mr_vif
*/
struct ipmr_vif_iter {
struct seq_net_private p;
@ -2692,10 +2627,7 @@ static const struct net_protocol pim_protocol = {
};
#endif
/*
* Setup for IP multicast routing
*/
/* Setup for IP multicast routing */
static int __net_init ipmr_net_init(struct net *net)
{
int err;