From 3b0d3f93d01bb013c3dcf9555d2d111c91ac6a1e Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Thu, 3 Jan 2008 13:28:58 -0500 Subject: [PATCH] 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 --- fs/nfs/client.c | 41 +++++++++++++++++++++++++++++++++++++++-- 1 file changed, 39 insertions(+), 2 deletions(-) diff --git a/fs/nfs/client.c b/fs/nfs/client.c index 701cd193a014..876162cddf1e 100644 --- a/fs/nfs/client.c +++ b/fs/nfs/client.c @@ -34,6 +34,8 @@ #include #include #include +#include +#include #include #include @@ -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. -- 2.20.1