@@ -89,6 +89,7 @@ struct p9_req_t {
* struct p9_client - per client instance state
* @lock: protect @fids and @reqs
* @msize: maximum data size negotiated by protocol
+ * @trans_maxsize: actual maximum msize supported by transport channel
* @proto_version: 9P protocol version to use
* @trans_mod: module API instantiated with this client
* @status: connection state
@@ -103,6 +104,7 @@ struct p9_req_t {
struct p9_client {
spinlock_t lock;
unsigned int msize;
+ unsigned int trans_maxsize;
unsigned char proto_version;
struct p9_trans_module *trans_mod;
enum p9_trans_status status;
@@ -1037,6 +1037,14 @@ struct p9_client *p9_client_create(const char *dev_name, char *options)
goto free_client;
}
+ /*
+ * transport will get a chance to increase trans_maxsize (if
+ * necessary) and it may update trans_maxsize in create() function
+ * below accordingly to reflect the actual maximum size supported by
+ * the allocated transport channel
+ */
+ clnt->trans_maxsize = clnt->trans_mod->maxsize;
+
p9_debug(P9_DEBUG_MUX, "clnt %p trans %p msize %d protocol %d\n",
clnt, clnt->trans_mod, clnt->msize, clnt->proto_version);
@@ -1044,8 +1052,8 @@ struct p9_client *p9_client_create(const char *dev_name, char *options)
if (err)
goto put_trans;
- if (clnt->msize > clnt->trans_mod->maxsize) {
- clnt->msize = clnt->trans_mod->maxsize;
+ if (clnt->msize > clnt->trans_maxsize) {
+ clnt->msize = clnt->trans_maxsize;
p9_debug(P9_DEBUG_ERROR,
"Limiting 'msize' to %d as this is the maximum "
"supported by transport %s\n",
This new field 'trans_maxsize' optionally allows transport to update it to reflect the actual maximum msize supported by allocated transport channel. Signed-off-by: Christian Schoenebeck <linux_oss@crudebyte.com> --- include/net/9p/client.h | 2 ++ net/9p/client.c | 12 ++++++++++-- 2 files changed, 12 insertions(+), 2 deletions(-)