From 4cd82a5bb0f68236f67b1678bc9e6348a42241ed Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Thomas=20Wei=C3=9Fschuh?= Date: Sun, 17 Oct 2021 15:46:11 +0200 Subject: net/9p: autoload transport modules MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Automatically load transport modules based on the trans= parameter passed to mount. This removes the requirement for the user to know which module to use. Link: http://lkml.kernel.org/r/20211017134611.4330-1-linux@weissschuh.net Signed-off-by: Thomas Weißschuh Signed-off-by: Dominique Martinet --- include/net/9p/transport.h | 6 ++++++ net/9p/mod.c | 30 ++++++++++++++++++++++++------ net/9p/trans_rdma.c | 1 + net/9p/trans_virtio.c | 1 + net/9p/trans_xen.c | 1 + 5 files changed, 33 insertions(+), 6 deletions(-) diff --git a/include/net/9p/transport.h b/include/net/9p/transport.h index 3eb4261b2958..581555d88cba 100644 --- a/include/net/9p/transport.h +++ b/include/net/9p/transport.h @@ -11,6 +11,8 @@ #ifndef NET_9P_TRANSPORT_H #define NET_9P_TRANSPORT_H +#include + #define P9_DEF_MIN_RESVPORT (665U) #define P9_DEF_MAX_RESVPORT (1023U) @@ -55,4 +57,8 @@ void v9fs_unregister_trans(struct p9_trans_module *m); struct p9_trans_module *v9fs_get_trans_by_name(char *s); struct p9_trans_module *v9fs_get_default_trans(void); void v9fs_put_trans(struct p9_trans_module *m); + +#define MODULE_ALIAS_9P(transport) \ + MODULE_ALIAS("9p-" transport) + #endif /* NET_9P_TRANSPORT_H */ diff --git a/net/9p/mod.c b/net/9p/mod.c index 5126566850bd..aa38b8b0e0f6 100644 --- a/net/9p/mod.c +++ b/net/9p/mod.c @@ -12,6 +12,7 @@ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #include +#include #include #include #include @@ -87,12 +88,7 @@ void v9fs_unregister_trans(struct p9_trans_module *m) } EXPORT_SYMBOL(v9fs_unregister_trans); -/** - * v9fs_get_trans_by_name - get transport with the matching name - * @s: string identifying transport - * - */ -struct p9_trans_module *v9fs_get_trans_by_name(char *s) +static struct p9_trans_module *_p9_get_trans_by_name(char *s) { struct p9_trans_module *t, *found = NULL; @@ -106,6 +102,28 @@ struct p9_trans_module *v9fs_get_trans_by_name(char *s) } spin_unlock(&v9fs_trans_lock); + + return found; +} + +/** + * v9fs_get_trans_by_name - get transport with the matching name + * @s: string identifying transport + * + */ +struct p9_trans_module *v9fs_get_trans_by_name(char *s) +{ + struct p9_trans_module *found = NULL; + + found = _p9_get_trans_by_name(s); + +#ifdef CONFIG_MODULES + if (!found) { + request_module("9p-%s", s); + found = _p9_get_trans_by_name(s); + } +#endif + return found; } EXPORT_SYMBOL(v9fs_get_trans_by_name); diff --git a/net/9p/trans_rdma.c b/net/9p/trans_rdma.c index af0a8a6cd3fd..480fd27760d7 100644 --- a/net/9p/trans_rdma.c +++ b/net/9p/trans_rdma.c @@ -767,6 +767,7 @@ static void __exit p9_trans_rdma_exit(void) module_init(p9_trans_rdma_init); module_exit(p9_trans_rdma_exit); +MODULE_ALIAS_9P("rdma"); MODULE_AUTHOR("Tom Tucker "); MODULE_DESCRIPTION("RDMA Transport for 9P"); diff --git a/net/9p/trans_virtio.c b/net/9p/trans_virtio.c index 490a4c900339..bd5a89c4960d 100644 --- a/net/9p/trans_virtio.c +++ b/net/9p/trans_virtio.c @@ -794,6 +794,7 @@ static void __exit p9_virtio_cleanup(void) module_init(p9_virtio_init); module_exit(p9_virtio_cleanup); +MODULE_ALIAS_9P("virtio"); MODULE_DEVICE_TABLE(virtio, id_table); MODULE_AUTHOR("Eric Van Hensbergen "); diff --git a/net/9p/trans_xen.c b/net/9p/trans_xen.c index 3ec1a51a6944..e264dcee019a 100644 --- a/net/9p/trans_xen.c +++ b/net/9p/trans_xen.c @@ -552,6 +552,7 @@ static int p9_trans_xen_init(void) return rc; } module_init(p9_trans_xen_init); +MODULE_ALIAS_9P("xen"); static void p9_trans_xen_exit(void) { -- cgit v1.2.3