Commit 01d205d9 authored by Christian Schoenebeck's avatar Christian Schoenebeck Committed by Dominique Martinet
Browse files

net/9p: add 'pooled_rbuffers' flag to struct p9_trans_module 

This is a preparatory change for the subsequent patch: the RDMA
transport pulls the buffers for its 9p response messages from a
shared pool. [1] So this case has to be considered when choosing
an appropriate response message size in the subsequent patch.

Link: https://lore.kernel.org/all/Ys3jjg52EIyITPua@codewreck.org/ [1]
Link: https://lkml.kernel.org/r/79d24310226bc4eb037892b5c097ec4ad4819a03.1657920926.git.linux_oss@crudebyte.com


Signed-off-by: default avatarChristian Schoenebeck <linux_oss@crudebyte.com>
Signed-off-by: default avatarDominique Martinet <asmadeus@codewreck.org>
parent 1effdbf9

include/net/9p/transport.h

+5 −0
Original line number Diff line number Diff line
@@ -19,6 +19,10 @@ 
 * @list: used to maintain a list of currently available transports

 * @name: the human-readable name of the transport

 * @maxsize: transport provided maximum packet size

 * @pooled_rbuffers: currently only set for RDMA transport which pulls the

 *                   response buffers from a shared pool, and accordingly

 *                   we're less flexible when choosing the response message

 *                   size in this case

 * @def: set if this transport should be considered the default

 * @create: member function to create a new connection on this transport

 * @close: member function to discard a connection on this transport
@@ -38,6 +42,7 @@ struct p9_trans_module { 
	struct list_head list;

	char *name;		/* name of transport */

	int maxsize;		/* max message size of transport */

	bool pooled_rbuffers;

	int def;		/* this transport should be default */

	struct module *owner;

	int (*create)(struct p9_client *client,

net/9p/trans_fd.c

+1 −0
Original line number Diff line number Diff line
@@ -1083,6 +1083,7 @@ p9_fd_create(struct p9_client *client, const char *addr, char *args) 
static struct p9_trans_module p9_tcp_trans = {

	.name = "tcp",

	.maxsize = MAX_SOCK_BUF,

	.pooled_rbuffers = false,

	.def = 0,

	.create = p9_fd_create_tcp,

	.close = p9_fd_close,

net/9p/trans_rdma.c

+1 −0
Original line number Diff line number Diff line
@@ -739,6 +739,7 @@ rdma_create_trans(struct p9_client *client, const char *addr, char *args) 
static struct p9_trans_module p9_rdma_trans = {

	.name = "rdma",

	.maxsize = P9_RDMA_MAXSIZE,

	.pooled_rbuffers = true,

	.def = 0,

	.owner = THIS_MODULE,

	.create = rdma_create_trans,

net/9p/trans_virtio.c

+1 −0
Original line number Diff line number Diff line
@@ -802,6 +802,7 @@ static struct p9_trans_module p9_virtio_trans = { 
	 * page in zero copy.

	 */

	.maxsize = PAGE_SIZE * (VIRTQUEUE_NUM - 3),

	.pooled_rbuffers = false,

	.def = 1,

	.owner = THIS_MODULE,

};

net/9p/trans_xen.c

+1 −0
Original line number Diff line number Diff line
@@ -246,6 +246,7 @@ static irqreturn_t xen_9pfs_front_event_handler(int irq, void *r) 
static struct p9_trans_module p9_xen_trans = {

	.name = "xen",

	.maxsize = 1 << (XEN_9PFS_RING_ORDER + XEN_PAGE_SHIFT - 2),

	.pooled_rbuffers = false,

	.def = 1,

	.create = p9_xen_create,

	.close = p9_xen_close,