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Uninline inm_lookup_locked(). Now in_var.h doesn't dereference

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fields of struct ifnet.

Sponsored by:	Netflix
Sponsored by:	Nginx, Inc.
This commit is contained in:
Gleb Smirnoff 2013-10-29 11:21:31 +00:00
parent 66e01d73cd
commit 8d7cf9b5d4
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=257325
2 changed files with 45 additions and 43 deletions
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43
sys/netinet/in_mcast.c
View File

@ -223,6 +223,49 @@ imf_init(struct in_mfilter *imf, const int st0, const int st1)
imf->imf_st[1] = st1;
}
/*
* Function for looking up an in_multi record for an IPv4 multicast address
* on a given interface. ifp must be valid. If no record found, return NULL.
* The IN_MULTI_LOCK and IF_ADDR_LOCK on ifp must be held.
*/
struct in_multi *
inm_lookup_locked(struct ifnet *ifp, const struct in_addr ina)
{
struct ifmultiaddr *ifma;
struct in_multi *inm;
IN_MULTI_LOCK_ASSERT();
IF_ADDR_LOCK_ASSERT(ifp);
inm = NULL;
TAILQ_FOREACH(ifma, &((ifp)->if_multiaddrs), ifma_link) {
if (ifma->ifma_addr->sa_family == AF_INET) {
inm = (struct in_multi *)ifma->ifma_protospec;
if (inm->inm_addr.s_addr == ina.s_addr)
break;
inm = NULL;
}
}
return (inm);
}
/*
* Wrapper for inm_lookup_locked().
* The IF_ADDR_LOCK will be taken on ifp and released on return.
*/
struct in_multi *
inm_lookup(struct ifnet *ifp, const struct in_addr ina)
{
struct in_multi *inm;
IN_MULTI_LOCK_ASSERT();
IF_ADDR_RLOCK(ifp);
inm = inm_lookup_locked(ifp, ina);
IF_ADDR_RUNLOCK(ifp);
return (inm);
}
/*
* Resize the ip_moptions vector to the next power-of-two minus 1.
* May be called with locks held; do not sleep.

45
sys/netinet/in_var.h
View File

@ -363,49 +363,6 @@ extern struct mtx in_multi_mtx;
#define IN_MULTI_LOCK_ASSERT() mtx_assert(&in_multi_mtx, MA_OWNED)
#define IN_MULTI_UNLOCK_ASSERT() mtx_assert(&in_multi_mtx, MA_NOTOWNED)
/*
* Function for looking up an in_multi record for an IPv4 multicast address
* on a given interface. ifp must be valid. If no record found, return NULL.
* The IN_MULTI_LOCK and IF_ADDR_LOCK on ifp must be held.
*/
static __inline struct in_multi *
inm_lookup_locked(struct ifnet *ifp, const struct in_addr ina)
{
struct ifmultiaddr *ifma;
struct in_multi *inm;
IN_MULTI_LOCK_ASSERT();
IF_ADDR_LOCK_ASSERT(ifp);
inm = NULL;
TAILQ_FOREACH(ifma, &((ifp)->if_multiaddrs), ifma_link) {
if (ifma->ifma_addr->sa_family == AF_INET) {
inm = (struct in_multi *)ifma->ifma_protospec;
if (inm->inm_addr.s_addr == ina.s_addr)
break;
inm = NULL;
}
}
return (inm);
}
/*
* Wrapper for inm_lookup_locked().
* The IF_ADDR_LOCK will be taken on ifp and released on return.
*/
static __inline struct in_multi *
inm_lookup(struct ifnet *ifp, const struct in_addr ina)
{
struct in_multi *inm;
IN_MULTI_LOCK_ASSERT();
IF_ADDR_RLOCK(ifp);
inm = inm_lookup_locked(ifp, ina);
IF_ADDR_RUNLOCK(ifp);
return (inm);
}
/* Acquire an in_multi record. */
static __inline void
inm_acquire_locked(struct in_multi *inm)
@ -428,6 +385,8 @@ struct route;
struct ip_moptions;
struct radix_node_head;
struct in_multi *inm_lookup_locked(struct ifnet *, const struct in_addr);
struct in_multi *inm_lookup(struct ifnet *, const struct in_addr);
int imo_multi_filter(const struct ip_moptions *, const struct ifnet *,
const struct sockaddr *, const struct sockaddr *);
void inm_commit(struct in_multi *);