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Commit 7ef8f65d authored by Nikolay Aleksandrov's avatar Nikolay Aleksandrov Committed by David S. Miller
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net: ipmr: fix code and comment style 

Trivial code and comment style fixes, also removed some extra newlines,
spaces and tabs.
Signed-off-by: default avatarNikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent c316c629
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Showing with 54 additions and 147 deletions
include/uapi/linux/mroute.h
View file @ 7ef8f65d
...@@ -4,15 +4,13 @@ ...@@ -4,15 +4,13 @@
#include <linux/sockios.h> #include <linux/sockios.h>
#include <linux/types.h> #include <linux/types.h>
/* /* Based on the MROUTING 3.5 defines primarily to keep
* Based on the MROUTING 3.5 defines primarily to keep * source compatibility with BSD.
* source compatibility with BSD.
* *
* See the mrouted code for the original history. * See the mrouted code for the original history.
*
* Protocol Independent Multicast (PIM) data structures included
* Carlos Picoto (cap@di.fc.ul.pt)
* *
* Protocol Independent Multicast (PIM) data structures included
* Carlos Picoto (cap@di.fc.ul.pt)
*/ */
#define MRT_BASE 200 #define MRT_BASE 200
...@@ -34,15 +32,13 @@ ...@@ -34,15 +32,13 @@
#define SIOCGETSGCNT (SIOCPROTOPRIVATE+1) #define SIOCGETSGCNT (SIOCPROTOPRIVATE+1)
#define SIOCGETRPF (SIOCPROTOPRIVATE+2) #define SIOCGETRPF (SIOCPROTOPRIVATE+2)
#define MAXVIFS 32 #define MAXVIFS 32
typedef unsigned long vifbitmap_t; /* User mode code depends on this lot */ typedef unsigned long vifbitmap_t; /* User mode code depends on this lot */
typedef unsigned short vifi_t; typedef unsigned short vifi_t;
#define ALL_VIFS ((vifi_t)(-1)) #define ALL_VIFS ((vifi_t)(-1))
/* /* Same idea as select */
* Same idea as select
*/
#define VIFM_SET(n,m) ((m)|=(1<<(n))) #define VIFM_SET(n,m) ((m)|=(1<<(n)))
#define VIFM_CLR(n,m) ((m)&=~(1<<(n))) #define VIFM_CLR(n,m) ((m)&=~(1<<(n)))
#define VIFM_ISSET(n,m) ((m)&(1<<(n))) #define VIFM_ISSET(n,m) ((m)&(1<<(n)))
...@@ -50,11 +46,9 @@ typedef unsigned short vifi_t; ...@@ -50,11 +46,9 @@ typedef unsigned short vifi_t;
#define VIFM_COPY(mfrom,mto) ((mto)=(mfrom)) #define VIFM_COPY(mfrom,mto) ((mto)=(mfrom))
#define VIFM_SAME(m1,m2) ((m1)==(m2)) #define VIFM_SAME(m1,m2) ((m1)==(m2))
/* /* Passed by mrouted for an MRT_ADD_VIF - again we use the
* Passed by mrouted for an MRT_ADD_VIF - again we use the * mrouted 3.6 structures for compatibility
* mrouted 3.6 structures for compatibility
*/ */
struct vifctl { struct vifctl {
vifi_t vifc_vifi; /* Index of VIF */ vifi_t vifc_vifi; /* Index of VIF */
unsigned char vifc_flags; /* VIFF_ flags */ unsigned char vifc_flags; /* VIFF_ flags */
...@@ -73,10 +67,7 @@ struct vifctl { ...@@ -73,10 +67,7 @@ struct vifctl {
#define VIFF_USE_IFINDEX 0x8 /* use vifc_lcl_ifindex instead of #define VIFF_USE_IFINDEX 0x8 /* use vifc_lcl_ifindex instead of
vifc_lcl_addr to find an interface */ vifc_lcl_addr to find an interface */
/* /* Cache manipulation structures for mrouted and PIMd */
* Cache manipulation structures for mrouted and PIMd
*/
struct mfcctl { struct mfcctl {
struct in_addr mfcc_origin; /* Origin of mcast */ struct in_addr mfcc_origin; /* Origin of mcast */
struct in_addr mfcc_mcastgrp; /* Group in question */ struct in_addr mfcc_mcastgrp; /* Group in question */
...@@ -88,10 +79,7 @@ struct mfcctl { ...@@ -88,10 +79,7 @@ struct mfcctl {
int mfcc_expire; int mfcc_expire;
}; };
/* /* Group count retrieval for mrouted */
* Group count retrieval for mrouted
*/
struct sioc_sg_req { struct sioc_sg_req {
struct in_addr src; struct in_addr src;
struct in_addr grp; struct in_addr grp;
...@@ -100,10 +88,7 @@ struct sioc_sg_req { ...@@ -100,10 +88,7 @@ struct sioc_sg_req {
unsigned long wrong_if; unsigned long wrong_if;
}; };
/* /* To get vif packet counts */
* To get vif packet counts
*/
struct sioc_vif_req { struct sioc_vif_req {
vifi_t vifi; /* Which iface */ vifi_t vifi; /* Which iface */
unsigned long icount; /* In packets */ unsigned long icount; /* In packets */
...@@ -112,11 +97,9 @@ struct sioc_vif_req { ...@@ -112,11 +97,9 @@ struct sioc_vif_req {
unsigned long obytes; /* Out bytes */ unsigned long obytes; /* Out bytes */
}; };
/* /* This is the format the mroute daemon expects to see IGMP control
* 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
* data. Magically happens to be like an IP packet as per the original
*/ */
struct igmpmsg { struct igmpmsg {
__u32 unused1,unused2; __u32 unused1,unused2;
unsigned char im_msgtype; /* What is this */ unsigned char im_msgtype; /* What is this */
...@@ -126,21 +109,13 @@ struct igmpmsg { ...@@ -126,21 +109,13 @@ struct igmpmsg {
struct in_addr im_src,im_dst; 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 */ #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_NOCACHE 1 /* Kern cache fill request to mrouted */
#define IGMPMSG_WRONGVIF 2 /* For PIM assert processing (unused) */ #define IGMPMSG_WRONGVIF 2 /* For PIM assert processing (unused) */
#define IGMPMSG_WHOLEPKT 3 /* For PIM Register processing */ #define IGMPMSG_WHOLEPKT 3 /* For PIM Register processing */
#endif /* _UAPI__LINUX_MROUTE_H */ #endif /* _UAPI__LINUX_MROUTE_H */
net/ipv4/ipmr.c
View file @ 7ef8f65d
...@@ -102,9 +102,7 @@ static inline bool pimsm_enabled(void) ...@@ -102,9 +102,7 @@ static inline bool pimsm_enabled(void)
static DEFINE_RWLOCK(mrt_lock); static DEFINE_RWLOCK(mrt_lock);
/* /* Multicast router control variables */
* Multicast router control variables
*/
#define VIF_EXISTS(_mrt, _idx) ((_mrt)->vif_table[_idx].dev != NULL) #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) ...@@ -393,8 +391,7 @@ static void ipmr_del_tunnel(struct net_device *dev, struct vifctl *v)
} }
} }
static static struct net_device *ipmr_new_tunnel(struct net *net, struct vifctl *v)
struct net_device *ipmr_new_tunnel(struct net *net, struct vifctl *v)
{ {
struct net_device *dev; struct net_device *dev;
...@@ -561,8 +558,7 @@ static int __pim_rcv(struct mr_table *mrt, struct sk_buff *skb, ...@@ -561,8 +558,7 @@ static int __pim_rcv(struct mr_table *mrt, struct sk_buff *skb,
struct iphdr *encap; struct iphdr *encap;
encap = (struct iphdr *)(skb_transport_header(skb) + pimlen); encap = (struct iphdr *)(skb_transport_header(skb) + pimlen);
/* /* Check that:
* Check that:
* a. packet is really sent to a multicast group * a. packet is really sent to a multicast group
* b. packet is not a NULL-REGISTER * b. packet is not a NULL-REGISTER
* c. packet is not truncated * c. packet is not truncated
...@@ -603,7 +599,6 @@ static struct net_device *ipmr_reg_vif(struct net *net, struct mr_table *mrt) ...@@ -603,7 +599,6 @@ static struct net_device *ipmr_reg_vif(struct net *net, struct mr_table *mrt)
* vif_delete - Delete a VIF entry * vif_delete - Delete a VIF entry
* @notify: Set to 1, if the caller is a notifier_call * @notify: Set to 1, if the caller is a notifier_call
*/ */
static int vif_delete(struct mr_table *mrt, int vifi, int notify, static int vif_delete(struct mr_table *mrt, int vifi, int notify,
struct list_head *head) struct list_head *head)
{ {
...@@ -673,7 +668,6 @@ static inline void ipmr_cache_free(struct mfc_cache *c) ...@@ -673,7 +668,6 @@ static inline void ipmr_cache_free(struct mfc_cache *c)
/* Destroy an unresolved cache entry, killing queued skbs /* Destroy an unresolved cache entry, killing queued skbs
* and reporting error to netlink readers. * and reporting error to netlink readers.
*/ */
static void ipmr_destroy_unres(struct mr_table *mrt, struct mfc_cache *c) static void ipmr_destroy_unres(struct mr_table *mrt, struct mfc_cache *c)
{ {
struct net *net = read_pnet(&mrt->net); struct net *net = read_pnet(&mrt->net);
...@@ -701,9 +695,7 @@ static void ipmr_destroy_unres(struct mr_table *mrt, struct mfc_cache *c) ...@@ -701,9 +695,7 @@ static void ipmr_destroy_unres(struct mr_table *mrt, struct mfc_cache *c)
ipmr_cache_free(c); ipmr_cache_free(c);
} }
/* Timer process for the unresolved queue. */ /* Timer process for the unresolved queue. */
static void ipmr_expire_process(unsigned long arg) static void ipmr_expire_process(unsigned long arg)
{ {
struct mr_table *mrt = (struct mr_table *)arg; struct mr_table *mrt = (struct mr_table *)arg;
...@@ -743,7 +735,6 @@ static void ipmr_expire_process(unsigned long arg) ...@@ -743,7 +735,6 @@ static void ipmr_expire_process(unsigned long arg)
} }
/* Fill oifs list. It is called under write locked mrt_lock. */ /* Fill oifs list. It is called under write locked mrt_lock. */
static void ipmr_update_thresholds(struct mr_table *mrt, struct mfc_cache *cache, static void ipmr_update_thresholds(struct mr_table *mrt, struct mfc_cache *cache,
unsigned char *ttls) unsigned char *ttls)
{ {
...@@ -808,7 +799,6 @@ static int vif_add(struct net *net, struct mr_table *mrt, ...@@ -808,7 +799,6 @@ static int vif_add(struct net *net, struct mr_table *mrt,
return err; return err;
} }
break; break;
case VIFF_USE_IFINDEX: case VIFF_USE_IFINDEX:
case 0: case 0:
if (vifc->vifc_flags == VIFF_USE_IFINDEX) { if (vifc->vifc_flags == VIFF_USE_IFINDEX) {
...@@ -928,9 +918,7 @@ static struct mfc_cache *ipmr_cache_find_any(struct mr_table *mrt, ...@@ -928,9 +918,7 @@ static struct mfc_cache *ipmr_cache_find_any(struct mr_table *mrt,
return ipmr_cache_find_any_parent(mrt, vifi); 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) static struct mfc_cache *ipmr_cache_alloc(void)
{ {
struct mfc_cache *c = kmem_cache_zalloc(mrt_cachep, GFP_KERNEL); struct mfc_cache *c = kmem_cache_zalloc(mrt_cachep, GFP_KERNEL);
...@@ -951,10 +939,7 @@ static struct mfc_cache *ipmr_cache_alloc_unres(void) ...@@ -951,10 +939,7 @@ static struct mfc_cache *ipmr_cache_alloc_unres(void)
return c; 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, static void ipmr_cache_resolve(struct net *net, struct mr_table *mrt,
struct mfc_cache *uc, struct mfc_cache *c) struct mfc_cache *uc, struct mfc_cache *c)
{ {
...@@ -962,7 +947,6 @@ static void ipmr_cache_resolve(struct net *net, struct mr_table *mrt, ...@@ -962,7 +947,6 @@ static void ipmr_cache_resolve(struct net *net, struct mr_table *mrt,
struct nlmsgerr *e; struct nlmsgerr *e;
/* Play the pending entries through our router */ /* Play the pending entries through our router */
while ((skb = __skb_dequeue(&uc->mfc_un.unres.unresolved))) { while ((skb = __skb_dequeue(&uc->mfc_un.unres.unresolved))) {
if (ip_hdr(skb)->version == 0) { if (ip_hdr(skb)->version == 0) {
struct nlmsghdr *nlh = (struct nlmsghdr *)skb_pull(skb, sizeof(struct iphdr)); struct nlmsghdr *nlh = (struct nlmsghdr *)skb_pull(skb, sizeof(struct iphdr));
...@@ -1064,12 +1048,9 @@ static int ipmr_cache_report(struct mr_table *mrt, ...@@ -1064,12 +1048,9 @@ static int ipmr_cache_report(struct mr_table *mrt,
return ret; return ret;
} }
/* /* Queue a packet for resolution. It gets locked cache entry! */
* 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)
static int
ipmr_cache_unresolved(struct mr_table *mrt, vifi_t vifi, struct sk_buff *skb)
{ {
bool found = false; bool found = false;
int err; int err;
...@@ -1087,7 +1068,6 @@ ipmr_cache_unresolved(struct mr_table *mrt, vifi_t vifi, struct sk_buff *skb) ...@@ -1087,7 +1068,6 @@ ipmr_cache_unresolved(struct mr_table *mrt, vifi_t vifi, struct sk_buff *skb)
if (!found) { if (!found) {
/* Create a new entry if allowable */ /* Create a new entry if allowable */
if (atomic_read(&mrt->cache_resolve_queue_len) >= 10 || if (atomic_read(&mrt->cache_resolve_queue_len) >= 10 ||
(c = ipmr_cache_alloc_unres()) == NULL) { (c = ipmr_cache_alloc_unres()) == NULL) {
spin_unlock_bh(&mfc_unres_lock); spin_unlock_bh(&mfc_unres_lock);
...@@ -1097,13 +1077,11 @@ ipmr_cache_unresolved(struct mr_table *mrt, vifi_t vifi, struct sk_buff *skb) ...@@ -1097,13 +1077,11 @@ ipmr_cache_unresolved(struct mr_table *mrt, vifi_t vifi, struct sk_buff *skb)
} }
/* Fill in the new cache entry */ /* Fill in the new cache entry */
c->mfc_parent = -1; c->mfc_parent = -1;
c->mfc_origin = iph->saddr; c->mfc_origin = iph->saddr;
c->mfc_mcastgrp = iph->daddr; c->mfc_mcastgrp = iph->daddr;
/* Reflect first query at mrouted. */ /* Reflect first query at mrouted. */
err = ipmr_cache_report(mrt, skb, vifi, IGMPMSG_NOCACHE); err = ipmr_cache_report(mrt, skb, vifi, IGMPMSG_NOCACHE);
if (err < 0) { if (err < 0) {
/* If the report failed throw the cache entry /* 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) ...@@ -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 */ /* See if we can append the packet */
if (c->mfc_un.unres.unresolved.qlen > 3) { if (c->mfc_un.unres.unresolved.qlen > 3) {
kfree_skb(skb); kfree_skb(skb);
err = -ENOBUFS; err = -ENOBUFS;
...@@ -1138,9 +1115,7 @@ ipmr_cache_unresolved(struct mr_table *mrt, vifi_t vifi, struct sk_buff *skb) ...@@ -1138,9 +1115,7 @@ ipmr_cache_unresolved(struct mr_table *mrt, vifi_t vifi, struct sk_buff *skb)
return err; 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) 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, ...@@ -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]); list_add_rcu(&c->list, &mrt->mfc_cache_array[line]);
/* /* Check to see if we resolved a queued list. If so we
* Check to see if we resolved a queued list. If so we * need to send on the frames and tidy up.
* need to send on the frames and tidy up.
*/ */
found = false; found = false;
spin_lock_bh(&mfc_unres_lock); spin_lock_bh(&mfc_unres_lock);
...@@ -1238,10 +1212,7 @@ static int ipmr_mfc_add(struct net *net, struct mr_table *mrt, ...@@ -1238,10 +1212,7 @@ static int ipmr_mfc_add(struct net *net, struct mr_table *mrt,
return 0; 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) static void mroute_clean_tables(struct mr_table *mrt)
{ {
int i; int i;
...@@ -1249,7 +1220,6 @@ static void mroute_clean_tables(struct mr_table *mrt) ...@@ -1249,7 +1220,6 @@ static void mroute_clean_tables(struct mr_table *mrt)
struct mfc_cache *c, *next; struct mfc_cache *c, *next;
/* Shut down all active vif entries */ /* Shut down all active vif entries */
for (i = 0; i < mrt->maxvif; i++) { for (i = 0; i < mrt->maxvif; i++) {
if (!(mrt->vif_table[i].flags & VIFF_STATIC)) if (!(mrt->vif_table[i].flags & VIFF_STATIC))
vif_delete(mrt, i, 0, &list); vif_delete(mrt, i, 0, &list);
...@@ -1257,7 +1227,6 @@ static void mroute_clean_tables(struct mr_table *mrt) ...@@ -1257,7 +1227,6 @@ static void mroute_clean_tables(struct mr_table *mrt)
unregister_netdevice_many(&list); unregister_netdevice_many(&list);
/* Wipe the cache */ /* Wipe the cache */
for (i = 0; i < MFC_LINES; i++) { for (i = 0; i < MFC_LINES; i++) {
list_for_each_entry_safe(c, next, &mrt->mfc_cache_array[i], list) { list_for_each_entry_safe(c, next, &mrt->mfc_cache_array[i], list) {
if (c->mfc_flags & MFC_STATIC) if (c->mfc_flags & MFC_STATIC)
...@@ -1301,11 +1270,10 @@ static void mrtsock_destruct(struct sock *sk) ...@@ -1301,11 +1270,10 @@ static void mrtsock_destruct(struct sock *sk)
rtnl_unlock(); rtnl_unlock();
} }
/* /* Socket options and virtual interface manipulation. The whole
* Socket options and virtual interface manipulation. The whole * virtual interface system is a complete heap, but unfortunately
* virtual interface system is a complete heap, but unfortunately * that's how BSD mrouted happens to think. Maybe one day with a proper
* that's how BSD mrouted happens to think. Maybe one day with a proper * MOSPF/PIM router set up we can clean this up.
* 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) 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 ...@@ -1373,10 +1341,9 @@ int ip_mroute_setsockopt(struct sock *sk, int optname, char __user *optval, unsi
rtnl_unlock(); rtnl_unlock();
return ret; return ret;
/* /* Manipulate the forwarding caches. These live
* Manipulate the forwarding caches. These live * in a sort of kernel/user symbiosis.
* in a sort of kernel/user symbiosis. */
*/
case MRT_ADD_MFC: case MRT_ADD_MFC:
case MRT_DEL_MFC: case MRT_DEL_MFC:
parent = -1; parent = -1;
...@@ -1397,9 +1364,7 @@ int ip_mroute_setsockopt(struct sock *sk, int optname, char __user *optval, unsi ...@@ -1397,9 +1364,7 @@ int ip_mroute_setsockopt(struct sock *sk, int optname, char __user *optval, unsi
parent); parent);
rtnl_unlock(); rtnl_unlock();
return ret; return ret;
/* /* Control PIM assert. */
* Control PIM assert.
*/
case MRT_ASSERT: case MRT_ASSERT:
{ {
int v; int v;
...@@ -1456,19 +1421,13 @@ int ip_mroute_setsockopt(struct sock *sk, int optname, char __user *optval, unsi ...@@ -1456,19 +1421,13 @@ int ip_mroute_setsockopt(struct sock *sk, int optname, char __user *optval, unsi
return ret; return ret;
} }
#endif #endif
/* /* Spurious command, or MRT_VERSION which you cannot set. */
* Spurious command, or MRT_VERSION which you cannot
* set.
*/
default: default:
return -ENOPROTOOPT; 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 ip_mroute_getsockopt(struct sock *sk, int optname, char __user *optval, int __user *optlen)
{ {
int olr; int olr;
...@@ -1512,10 +1471,7 @@ int ip_mroute_getsockopt(struct sock *sk, int optname, char __user *optval, int ...@@ -1512,10 +1471,7 @@ int ip_mroute_getsockopt(struct sock *sk, int optname, char __user *optval, int
return 0; 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) int ipmr_ioctl(struct sock *sk, int cmd, void __user *arg)
{ {
struct sioc_sg_req sr; struct sioc_sg_req sr;
...@@ -1648,7 +1604,6 @@ int ipmr_compat_ioctl(struct sock *sk, unsigned int cmd, void __user *arg) ...@@ -1648,7 +1604,6 @@ int ipmr_compat_ioctl(struct sock *sk, unsigned int cmd, void __user *arg)
} }
#endif #endif
static int ipmr_device_event(struct notifier_block *this, unsigned long event, void *ptr) static int ipmr_device_event(struct notifier_block *this, unsigned long event, void *ptr)
{ {
struct net_device *dev = netdev_notifier_info_to_dev(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 ...@@ -1670,17 +1625,14 @@ static int ipmr_device_event(struct notifier_block *this, unsigned long event, v
return NOTIFY_DONE; return NOTIFY_DONE;
} }
static struct notifier_block ip_mr_notifier = { static struct notifier_block ip_mr_notifier = {
.notifier_call = ipmr_device_event, .notifier_call = ipmr_device_event,
}; };
/* /* Encapsulate a packet by attaching a valid IPIP header to it.
* Encapsulate a packet by attaching a valid IPIP header to it. * This avoids tunnel drivers and other mess and gives us the speed so
* This avoids tunnel drivers and other mess and gives us the speed so * important for multicast video.
* important for multicast video.
*/ */
static void ip_encap(struct net *net, struct sk_buff *skb, static void ip_encap(struct net *net, struct sk_buff *skb,
__be32 saddr, __be32 daddr) __be32 saddr, __be32 daddr)
{ {
...@@ -1722,9 +1674,7 @@ static inline int ipmr_forward_finish(struct net *net, struct sock *sk, ...@@ -1722,9 +1674,7 @@ static inline int ipmr_forward_finish(struct net *net, struct sock *sk,
return dst_output(net, sk, skb); 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, static void ipmr_queue_xmit(struct net *net, struct mr_table *mrt,
struct sk_buff *skb, struct mfc_cache *c, int vifi) 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, ...@@ -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 * allow to send ICMP, so that packets will disappear
* to blackhole. * to blackhole.
*/ */
IP_INC_STATS(net, IPSTATS_MIB_FRAGFAILS); IP_INC_STATS(net, IPSTATS_MIB_FRAGFAILS);
ip_rt_put(rt); ip_rt_put(rt);
goto out_free; goto out_free;
...@@ -1805,8 +1754,7 @@ static void ipmr_queue_xmit(struct net *net, struct mr_table *mrt, ...@@ -1805,8 +1754,7 @@ static void ipmr_queue_xmit(struct net *net, struct mr_table *mrt,
IPCB(skb)->flags |= IPSKB_FORWARDED; 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 * not only before forwarding, but after forwarding on all output
* interfaces. It is clear, if mrouter runs a multicasting * interfaces. It is clear, if mrouter runs a multicasting
* program, it should receive packets not depending to what interface * 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) ...@@ -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) */ /* "local" means that we should preserve one skb (for local delivery) */
static void ip_mr_forward(struct net *net, struct mr_table *mrt, static void ip_mr_forward(struct net *net, struct mr_table *mrt,
struct sk_buff *skb, struct mfc_cache *cache, struct sk_buff *skb, struct mfc_cache *cache,
int local) int local)
...@@ -1862,9 +1809,7 @@ static void ip_mr_forward(struct net *net, struct mr_table *mrt, ...@@ -1862,9 +1809,7 @@ static void ip_mr_forward(struct net *net, struct mr_table *mrt,
goto forward; 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 (mrt->vif_table[vif].dev != skb->dev) {
if (rt_is_output_route(skb_rtable(skb))) { if (rt_is_output_route(skb_rtable(skb))) {
/* It is our own packet, looped back. /* It is our own packet, looped back.
...@@ -1903,9 +1848,7 @@ static void ip_mr_forward(struct net *net, struct mr_table *mrt, ...@@ -1903,9 +1848,7 @@ static void ip_mr_forward(struct net *net, struct mr_table *mrt,
mrt->vif_table[vif].pkt_in++; mrt->vif_table[vif].pkt_in++;
mrt->vif_table[vif].bytes_in += skb->len; mrt->vif_table[vif].bytes_in += skb->len;
/* /* Forward the frame */
* Forward the frame
*/
if (cache->mfc_origin == htonl(INADDR_ANY) && if (cache->mfc_origin == htonl(INADDR_ANY) &&
cache->mfc_mcastgrp == htonl(INADDR_ANY)) { cache->mfc_mcastgrp == htonl(INADDR_ANY)) {
if (true_vifi >= 0 && if (true_vifi >= 0 &&
...@@ -1979,11 +1922,9 @@ static struct mr_table *ipmr_rt_fib_lookup(struct net *net, struct sk_buff *skb) ...@@ -1979,11 +1922,9 @@ static struct mr_table *ipmr_rt_fib_lookup(struct net *net, struct sk_buff *skb)
return mrt; return mrt;
} }
/* /* Multicast packets for forwarding arrive here
* Multicast packets for forwarding arrive here * Called with rcu_read_lock();
* Called with rcu_read_lock();
*/ */
int ip_mr_input(struct sk_buff *skb) int ip_mr_input(struct sk_buff *skb)
{ {
struct mfc_cache *cache; struct mfc_cache *cache;
...@@ -2034,9 +1975,7 @@ int ip_mr_input(struct sk_buff *skb) ...@@ -2034,9 +1975,7 @@ int ip_mr_input(struct sk_buff *skb)
vif); vif);
} }
/* /* No usable cache entry */
* No usable cache entry
*/
if (!cache) { if (!cache) {
int vif; int vif;
...@@ -2078,10 +2017,7 @@ int ip_mr_input(struct sk_buff *skb) ...@@ -2078,10 +2017,7 @@ int ip_mr_input(struct sk_buff *skb)
} }
#ifdef CONFIG_IP_PIMSM_V1 #ifdef CONFIG_IP_PIMSM_V1
/* /* Handle IGMP messages of PIMv1 */
* Handle IGMP messages of PIMv1
*/
int pim_rcv_v1(struct sk_buff *skb) int pim_rcv_v1(struct sk_buff *skb)
{ {
struct igmphdr *pim; struct igmphdr *pim;
...@@ -2406,9 +2342,8 @@ static int ipmr_rtm_dumproute(struct sk_buff *skb, struct netlink_callback *cb) ...@@ -2406,9 +2342,8 @@ static int ipmr_rtm_dumproute(struct sk_buff *skb, struct netlink_callback *cb)
} }
#ifdef CONFIG_PROC_FS #ifdef CONFIG_PROC_FS
/* /* The /proc interfaces to multicast routing :
* The /proc interfaces to multicast routing : * /proc/net/ip_mr_cache & /proc/net/ip_mr_vif
* /proc/net/ip_mr_cache & /proc/net/ip_mr_vif
*/ */
struct ipmr_vif_iter { struct ipmr_vif_iter {
struct seq_net_private p; struct seq_net_private p;
...@@ -2692,10 +2627,7 @@ static const struct net_protocol pim_protocol = { ...@@ -2692,10 +2627,7 @@ static const struct net_protocol pim_protocol = {
}; };
#endif #endif
/* Setup for IP multicast routing */
/*
* Setup for IP multicast routing
*/
static int __net_init ipmr_net_init(struct net *net) static int __net_init ipmr_net_init(struct net *net)
{ {
int err; int err;
......
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