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NFS: Add support for AF_INET6 addresses in __nfs_find_client() 

Introduce AF_INET6-specific address checking to __nfs_find_client().

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Trond Myklebust 2008-01-03 13:28:58 -05:00
parent 0d0f0c192d
commit 3b0d3f93d0
1 changed files with 39 additions and 2 deletions
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41
fs/nfs/client.c
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@ -34,6 +34,8 @@
#include <linux/nfs_idmap.h>
#include <linux/vfs.h>
#include <linux/inet.h>
#include <linux/in6.h>
#include <net/ipv6.h>
#include <linux/nfs_xdr.h>
#include <asm/system.h>
@ -208,16 +210,44 @@ void nfs_put_client(struct nfs_client *clp)
}
}
static int nfs_sockaddr_match_ipaddr4(const struct sockaddr_in *sa1,
const struct sockaddr_in *sa2)
{
return sa1->sin_addr.s_addr == sa2->sin_addr.s_addr;
}
static int nfs_sockaddr_match_ipaddr6(const struct sockaddr_in6 *sa1,
const struct sockaddr_in6 *sa2)
{
return ipv6_addr_equal(&sa1->sin6_addr, &sa2->sin6_addr);
}
static int nfs_sockaddr_match_ipaddr(const struct sockaddr *sa1,
const struct sockaddr *sa2)
{
switch (sa1->sa_family) {
case AF_INET:
return nfs_sockaddr_match_ipaddr4((const struct sockaddr_in *)sa1,
(const struct sockaddr_in *)sa2);
case AF_INET6:
return nfs_sockaddr_match_ipaddr6((const struct sockaddr_in6 *)sa1,
(const struct sockaddr_in6 *)sa2);
}
BUG();
}
/*
* Find a client by IP address and protocol version
* - returns NULL if no such client
*/
struct nfs_client *nfs_find_client(const struct sockaddr_in *addr, int nfsversion)
struct nfs_client *_nfs_find_client(const struct sockaddr *addr, int nfsversion)
{
struct nfs_client *clp;
spin_lock(&nfs_client_lock);
list_for_each_entry(clp, &nfs_client_list, cl_share_link) {
struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr;
/* Don't match clients that failed to initialise properly */
if (clp->cl_cons_state != NFS_CS_READY)
continue;
@ -226,8 +256,10 @@ struct nfs_client *nfs_find_client(const struct sockaddr_in *addr, int nfsversio
if (clp->rpc_ops->version != nfsversion)
continue;
if (addr->sa_family != clap->sa_family)
continue;
/* Match only the IP address, not the port number */
if (clp->cl_addr.sin_addr.s_addr != addr->sin_addr.s_addr)
if (!nfs_sockaddr_match_ipaddr(addr, clap))
continue;
atomic_inc(&clp->cl_count);
@ -238,6 +270,11 @@ struct nfs_client *nfs_find_client(const struct sockaddr_in *addr, int nfsversio
return NULL;
}
struct nfs_client *nfs_find_client(const struct sockaddr_in *addr, int nfsversion)
{
return _nfs_find_client((const struct sockaddr *)addr, nfsversion);
}
/*
* Find an nfs_client on the list that matches the initialisation data
* that is supplied.