Messages in this thread Patch in this message | | | From | Christian Schoenebeck <> | Date | Tue, 12 Jul 2022 16:31:19 +0200 | Subject | [PATCH v5 04/11] net/9p: add trans_maxsize to struct p9_client |
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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(-)
diff --git a/include/net/9p/client.h b/include/net/9p/client.h index ec1d1706f43c..f5718057fca4 100644 --- a/include/net/9p/client.h +++ b/include/net/9p/client.h @@ -87,6 +87,7 @@ 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 @@ -101,6 +102,7 @@ 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; diff --git a/net/9p/client.c b/net/9p/client.c index 8bba0d9cf975..20054addd81b 100644 --- a/net/9p/client.c +++ b/net/9p/client.c @@ -1031,6 +1031,14 @@ 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); @@ -1038,8 +1046,8 @@ 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; pr_info("Limiting 'msize' to %d as this is the maximum " "supported by transport %s\n", clnt->msize, clnt->trans_mod->name -- 2.30.2
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