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SUNRPC: Send RPC message on TCP with a single sock_sendmsg() call

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There is now enough infrastructure in place to combine the stream
record marker into the biovec array used to send each outgoing RPC
message on TCP. The whole message can be more efficiently sent with
a single call to sock_sendmsg() using a bio_vec iterator.

Note that this also helps with RPC-with-TLS: the TLS implementation
can now clearly see where the upper layer message boundaries are.
Before, it would send each component of the xdr_buf (record marker,
head, page payload, tail) in separate TLS records.

Suggested-by: David Howells <dhowells@redhat.com>
Reviewed-by: David Howells <dhowells@redhat.com>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
This commit is contained in:
Chuck Lever
2023-07-19 14:31:09 -04:00
parent 2eb2b93581
commit e18e157bb5
2 changed files with 20 additions and 15 deletions
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2
include/linux/sunrpc/svcsock.h
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@@ -38,6 +38,8 @@ struct svc_sock {
/* Number of queued send requests */
atomic_t sk_sendqlen;
struct page_frag_cache sk_frag_cache;
struct completion sk_handshake_done;
struct page * sk_pages[RPCSVC_MAXPAGES]; /* received data */