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| author | Christian Schoenebeck <linux_oss@crudebyte.com> | 2022-11-22 20:20:22 +0100 |
|---|---|---|
| committer | Dominique Martinet <asmadeus@codewreck.org> | 2022-12-06 07:30:55 +0900 |
| commit | 8e4c2eee1e15c1206c26f6b28b05fe9711a427c6 (patch) | |
| tree | 1a31c7e069db25fc2cb009d2283365ef2992529b | |
| parent | f15e006b831384aaec4b4f13265c0dff88ef09dd (diff) | |
| download | linux-8e4c2eee1e15c1206c26f6b28b05fe9711a427c6.tar.gz linux-8e4c2eee1e15c1206c26f6b28b05fe9711a427c6.tar.bz2 linux-8e4c2eee1e15c1206c26f6b28b05fe9711a427c6.zip | |
net/9p: distinguish zero-copy requests
Add boolean `zc` member to struct p9_fcall to distinguish zero-copy
messages (not using the linear `sdata` buffer for message payload) from
regular messages (which do copy message payload to `sdata` before being
further processed).
This new member is appended to end of structure to avoid inserting huge
padding in generated layout.
Link: https://lkml.kernel.org/r/8f2a5c12a446c3b544da64e0b1550e1fb2d6f972.1669144861.git.linux_oss@crudebyte.com
Signed-off-by: Christian Schoenebeck <linux_oss@crudebyte.com>
Tested-by: Stefano Stabellini <sstabellini@kernel.org>
Signed-off-by: Dominique Martinet <asmadeus@codewreck.org>
| -rw-r--r-- | include/net/9p/9p.h | 2 | ||||
| -rw-r--r-- | net/9p/client.c | 6 |
2 files changed, 8 insertions, 0 deletions
diff --git a/include/net/9p/9p.h b/include/net/9p/9p.h index 13abe013af21..429adf6be29c 100644 --- a/include/net/9p/9p.h +++ b/include/net/9p/9p.h @@ -531,6 +531,7 @@ struct p9_rstatfs { * @offset: used by marshalling routines to track current position in buffer * @capacity: used by marshalling routines to track total malloc'd capacity * @sdata: payload + * @zc: whether zero-copy is used * * &p9_fcall represents the structure for all 9P RPC * transactions. Requests are packaged into fcalls, and reponses @@ -549,6 +550,7 @@ struct p9_fcall { struct kmem_cache *cache; u8 *sdata; + bool zc; }; int p9_errstr2errno(char *errstr, int len); diff --git a/net/9p/client.c b/net/9p/client.c index b554f8357f96..a2b4a965a5a9 100644 --- a/net/9p/client.c +++ b/net/9p/client.c @@ -685,6 +685,9 @@ p9_client_rpc(struct p9_client *c, int8_t type, const char *fmt, ...) if (IS_ERR(req)) return req; + req->tc.zc = false; + req->rc.zc = false; + if (signal_pending(current)) { sigpending = 1; clear_thread_flag(TIF_SIGPENDING); @@ -783,6 +786,9 @@ static struct p9_req_t *p9_client_zc_rpc(struct p9_client *c, int8_t type, if (IS_ERR(req)) return req; + req->tc.zc = true; + req->rc.zc = true; + if (signal_pending(current)) { sigpending = 1; clear_thread_flag(TIF_SIGPENDING); |