From 3fbd67ad61f6d5a09ea717b56c50bc5c3d8042a8 Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Sat, 26 Jan 2008 01:06:40 -0500 Subject: NFSv4: Iterate through all nfs_clients when the server recalls a delegation The same delegation may have been handed out to more than one nfs_client. Ensure that if a recall occurs, we return all instances. Signed-off-by: Trond Myklebust --- fs/nfs/client.c | 35 +++++++++++++++++++++++++++++++++++ 1 file changed, 35 insertions(+) (limited to 'fs/nfs/client.c') diff --git a/fs/nfs/client.c b/fs/nfs/client.c index 7a15832369e..685c43f810c 100644 --- a/fs/nfs/client.c +++ b/fs/nfs/client.c @@ -275,6 +275,41 @@ struct nfs_client *nfs_find_client(const struct sockaddr *addr, u32 nfsversion) return NULL; } +/* + * Find a client by IP address and protocol version + * - returns NULL if no such client + */ +struct nfs_client *nfs_find_client_next(struct nfs_client *clp) +{ + struct sockaddr *sap = (struct sockaddr *)&clp->cl_addr; + u32 nfsvers = clp->rpc_ops->version; + + spin_lock(&nfs_client_lock); + list_for_each_entry_continue(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; + + /* Different NFS versions cannot share the same nfs_client */ + if (clp->rpc_ops->version != nfsvers) + continue; + + if (sap->sa_family != clap->sa_family) + continue; + /* Match only the IP address, not the port number */ + if (!nfs_sockaddr_match_ipaddr(sap, clap)) + continue; + + atomic_inc(&clp->cl_count); + spin_unlock(&nfs_client_lock); + return clp; + } + spin_unlock(&nfs_client_lock); + return NULL; +} + /* * Find an nfs_client on the list that matches the initialisation data * that is supplied. -- cgit v1.2.3