diff options
author | Tom Tucker <tom@opengridcomputing.com> | 2007-12-30 21:08:33 -0600 |
---|---|---|
committer | J. Bruce Fields <bfields@citi.umich.edu> | 2008-02-01 16:42:13 -0500 |
commit | 7fcb98d58cb4d18af6386f71025fc5192f25fbca (patch) | |
tree | 7ccd884928c644cebd717306937565fbcdc9dd88 | |
parent | dc9a16e49dbba3dd042e6aec5d9a7929e099a89b (diff) | |
download | kernel_samsung_espresso10-7fcb98d58cb4d18af6386f71025fc5192f25fbca.zip kernel_samsung_espresso10-7fcb98d58cb4d18af6386f71025fc5192f25fbca.tar.gz kernel_samsung_espresso10-7fcb98d58cb4d18af6386f71025fc5192f25fbca.tar.bz2 |
svc: Add svc API that queries for a transport instance
Add a new svc function that allows a service to query whether a
transport instance has already been created. This is used in lockd
to determine whether or not a transport needs to be created when
a lockd instance is brought up.
Specifying 0 for the address family or port is effectively a wild-card,
and will result in matching the first transport in the service's list
that has a matching class name.
Signed-off-by: Tom Tucker <tom@opengridcomputing.com>
Acked-by: Neil Brown <neilb@suse.de>
Reviewed-by: Chuck Lever <chuck.lever@oracle.com>
Reviewed-by: Greg Banks <gnb@sgi.com>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
-rw-r--r-- | fs/lockd/svc.c | 16 | ||||
-rw-r--r-- | include/linux/sunrpc/svc_xprt.h | 1 | ||||
-rw-r--r-- | net/sunrpc/svc_xprt.c | 35 |
3 files changed, 38 insertions, 14 deletions
diff --git a/fs/lockd/svc.c b/fs/lockd/svc.c index a8e79a9..470af01 100644 --- a/fs/lockd/svc.c +++ b/fs/lockd/svc.c @@ -219,18 +219,6 @@ lockd(struct svc_rqst *rqstp) module_put_and_exit(0); } -static int find_xprt(struct svc_serv *serv, char *proto) -{ - struct svc_xprt *xprt; - int found = 0; - list_for_each_entry(xprt, &serv->sv_permsocks, xpt_list) - if (strcmp(xprt->xpt_class->xcl_name, proto) == 0) { - found = 1; - break; - } - return found; -} - /* * Make any sockets that are needed but not present. * If nlm_udpport or nlm_tcpport were set as module @@ -242,11 +230,11 @@ static int make_socks(struct svc_serv *serv, int proto) int err = 0; if (proto == IPPROTO_UDP || nlm_udpport) - if (!find_xprt(serv, "udp")) + if (!svc_find_xprt(serv, "udp", 0, 0)) err = svc_create_xprt(serv, "udp", nlm_udpport, SVC_SOCK_DEFAULTS); if (err >= 0 && (proto == IPPROTO_TCP || nlm_tcpport)) - if (!find_xprt(serv, "tcp")) + if (!svc_find_xprt(serv, "tcp", 0, 0)) err = svc_create_xprt(serv, "tcp", nlm_tcpport, SVC_SOCK_DEFAULTS); diff --git a/include/linux/sunrpc/svc_xprt.h b/include/linux/sunrpc/svc_xprt.h index 01e71b7..68862d5 100644 --- a/include/linux/sunrpc/svc_xprt.h +++ b/include/linux/sunrpc/svc_xprt.h @@ -80,6 +80,7 @@ void svc_close_xprt(struct svc_xprt *xprt); void svc_delete_xprt(struct svc_xprt *xprt); int svc_port_is_privileged(struct sockaddr *sin); int svc_print_xprts(char *buf, int maxlen); +struct svc_xprt *svc_find_xprt(struct svc_serv *, char *, int, int); static inline void svc_xprt_get(struct svc_xprt *xprt) { diff --git a/net/sunrpc/svc_xprt.c b/net/sunrpc/svc_xprt.c index 2e5b92a..512c10f 100644 --- a/net/sunrpc/svc_xprt.c +++ b/net/sunrpc/svc_xprt.c @@ -977,3 +977,38 @@ static struct svc_deferred_req *svc_deferred_dequeue(struct svc_xprt *xprt) spin_unlock(&xprt->xpt_lock); return dr; } + +/* + * Return the transport instance pointer for the endpoint accepting + * connections/peer traffic from the specified transport class, + * address family and port. + * + * Specifying 0 for the address family or port is effectively a + * wild-card, and will result in matching the first transport in the + * service's list that has a matching class name. + */ +struct svc_xprt *svc_find_xprt(struct svc_serv *serv, char *xcl_name, + int af, int port) +{ + struct svc_xprt *xprt; + struct svc_xprt *found = NULL; + + /* Sanity check the args */ + if (!serv || !xcl_name) + return found; + + spin_lock_bh(&serv->sv_lock); + list_for_each_entry(xprt, &serv->sv_permsocks, xpt_list) { + if (strcmp(xprt->xpt_class->xcl_name, xcl_name)) + continue; + if (af != AF_UNSPEC && af != xprt->xpt_local.ss_family) + continue; + if (port && port != svc_xprt_local_port(xprt)) + continue; + found = xprt; + break; + } + spin_unlock_bh(&serv->sv_lock); + return found; +} +EXPORT_SYMBOL_GPL(svc_find_xprt); |