diff options
| -rw-r--r-- | fs/nfs/client.c | 52 |
1 files changed, 30 insertions, 22 deletions
diff --git a/fs/nfs/client.c b/fs/nfs/client.c index d7f6d50442b7..ff778ecee0bd 100644 --- a/fs/nfs/client.c +++ b/fs/nfs/client.c @@ -208,52 +208,60 @@ void nfs_put_client(struct nfs_client *clp) } /* - * Find a client by address - * - caller must hold nfs_client_lock + * Find a client by IP address and protocol version + * - returns NULL if no such client */ -static struct nfs_client *__nfs_find_client(const struct sockaddr_in *addr, int nfsversion, int match_port) +struct nfs_client *nfs_find_client(const struct sockaddr_in *addr, int nfsversion) { struct nfs_client *clp; + spin_lock(&nfs_client_lock); list_for_each_entry(clp, &nfs_client_list, cl_share_link) { /* Don't match clients that failed to initialise properly */ - if (clp->cl_cons_state < 0) + if (clp->cl_cons_state != NFS_CS_READY) continue; /* Different NFS versions cannot share the same nfs_client */ if (clp->cl_nfsversion != nfsversion) continue; + /* Match only the IP address, not the port number */ if (clp->cl_addr.sin_addr.s_addr != addr->sin_addr.s_addr) continue; - if (!match_port || clp->cl_addr.sin_port == addr->sin_port) - goto found; + atomic_inc(&clp->cl_count); + spin_unlock(&nfs_client_lock); + return clp; } - + spin_unlock(&nfs_client_lock); return NULL; - -found: - atomic_inc(&clp->cl_count); - return clp; } /* - * Find a client by IP address and protocol version - * - returns NULL if no such client + * Find an nfs_client on the list that matches the initialisation data + * that is supplied. */ -struct nfs_client *nfs_find_client(const struct sockaddr_in *addr, int nfsversion) +static struct nfs_client *nfs_match_client(const struct nfs_client_initdata *data) { struct nfs_client *clp; - spin_lock(&nfs_client_lock); - clp = __nfs_find_client(addr, nfsversion, 0); - spin_unlock(&nfs_client_lock); - if (clp != NULL && clp->cl_cons_state != NFS_CS_READY) { - nfs_put_client(clp); - clp = NULL; + list_for_each_entry(clp, &nfs_client_list, cl_share_link) { + /* Don't match clients that failed to initialise properly */ + if (clp->cl_cons_state < 0) + continue; + + /* Different NFS versions cannot share the same nfs_client */ + if (clp->cl_nfsversion != data->version) + continue; + + /* Match the full socket address */ + if (memcmp(&clp->cl_addr, data->addr, sizeof(clp->cl_addr)) != 0) + continue; + + atomic_inc(&clp->cl_count); + return clp; } - return clp; + return NULL; } /* @@ -273,7 +281,7 @@ static struct nfs_client *nfs_get_client(const struct nfs_client_initdata *cl_in do { spin_lock(&nfs_client_lock); - clp = __nfs_find_client(cl_init->addr, cl_init->version, 1); + clp = nfs_match_client(cl_init); if (clp) goto found_client; if (new) |
