| Message ID | 20230606130856.1970660-10-dhowells@redhat.com (mailing list archive) |
|---|---|
| State | Accepted |
| Commit | fb800fa4c1f5aee1238267252e88a7837e645c02 |
| Delegated to: | Netdev Maintainers |
| Headers | show |
| Series | crypto, splice, net: Make AF_ALG handle sendmsg(MSG_SPLICE_PAGES) | expand |
| Context | Check | Description |
|---|---|---|
| netdev/series_format | success | Posting correctly formatted |
| netdev/tree_selection | success | Clearly marked for net-next |
| netdev/fixes_present | success | Fixes tag not required for -next series |
| netdev/header_inline | success | No static functions without inline keyword in header files |
| netdev/build_32bit | success | Errors and warnings before: 8 this patch: 8 |
| netdev/cc_maintainers | success | CCed 3 of 3 maintainers |
| netdev/build_clang | success | Errors and warnings before: 8 this patch: 8 |
| netdev/verify_signedoff | success | Signed-off-by tag matches author and committer |
| netdev/deprecated_api | success | None detected |
| netdev/check_selftest | success | No net selftest shell script |
| netdev/verify_fixes | success | No Fixes tag |
| netdev/build_allmodconfig_warn | success | Errors and warnings before: 8 this patch: 8 |
| netdev/checkpatch | success | total: 0 errors, 0 warnings, 0 checks, 61 lines checked |
| netdev/kdoc | success | Errors and warnings before: 0 this patch: 0 |
| netdev/source_inline | success | Was 0 now: 0 |
On Tue, Jun 06, 2023 at 02:08:55PM +0100, David Howells wrote: > Convert af_alg_sendpage() to use sendmsg() with MSG_SPLICE_PAGES rather > than directly splicing in the pages itself. > > This allows ->sendpage() to be replaced by something that can handle > multiple multipage folios in a single transaction. > > Signed-off-by: David Howells <dhowells@redhat.com> > cc: Herbert Xu <herbert@gondor.apana.org.au> > cc: "David S. Miller" <davem@davemloft.net> > cc: Eric Dumazet <edumazet@google.com> > cc: Jakub Kicinski <kuba@kernel.org> > cc: Paolo Abeni <pabeni@redhat.com> > cc: Jens Axboe <axboe@kernel.dk> > cc: Matthew Wilcox <willy@infradead.org> > cc: linux-crypto@vger.kernel.org > cc: netdev@vger.kernel.org > --- > crypto/af_alg.c | 52 ++++++++----------------------------------------- > 1 file changed, 8 insertions(+), 44 deletions(-) Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
diff --git a/crypto/af_alg.c b/crypto/af_alg.c index 9c12530d604a..3cf734835ccb 100644 --- a/crypto/af_alg.c +++ b/crypto/af_alg.c @@ -1114,53 +1114,17 @@ EXPORT_SYMBOL_GPL(af_alg_sendmsg); ssize_t af_alg_sendpage(struct socket *sock, struct page *page, int offset, size_t size, int flags) { - struct sock *sk = sock->sk; - struct alg_sock *ask = alg_sk(sk); - struct af_alg_ctx *ctx = ask->private; - struct af_alg_tsgl *sgl; - int err = -EINVAL; + struct bio_vec bvec; + struct msghdr msg = { + .msg_flags = flags | MSG_SPLICE_PAGES, + }; if (flags & MSG_SENDPAGE_NOTLAST) - flags |= MSG_MORE; - - lock_sock(sk); - if (!ctx->more && ctx->used) - goto unlock; - - if (!size) - goto done; - - if (!af_alg_writable(sk)) { - err = af_alg_wait_for_wmem(sk, flags); - if (err) - goto unlock; - } - - err = af_alg_alloc_tsgl(sk); - if (err) - goto unlock; - - ctx->merge = 0; - sgl = list_entry(ctx->tsgl_list.prev, struct af_alg_tsgl, list); - - if (sgl->cur) - sg_unmark_end(sgl->sg + sgl->cur - 1); - - sg_mark_end(sgl->sg + sgl->cur); - - get_page(page); - sg_set_page(sgl->sg + sgl->cur, page, size, offset); - sgl->cur++; - ctx->used += size; - -done: - ctx->more = flags & MSG_MORE; - -unlock: - af_alg_data_wakeup(sk); - release_sock(sk); + msg.msg_flags |= MSG_MORE; - return err ?: size; + bvec_set_page(&bvec, page, size, offset); + iov_iter_bvec(&msg.msg_iter, ITER_SOURCE, &bvec, 1, size); + return sock_sendmsg(sock, &msg); } EXPORT_SYMBOL_GPL(af_alg_sendpage);
Convert af_alg_sendpage() to use sendmsg() with MSG_SPLICE_PAGES rather than directly splicing in the pages itself. This allows ->sendpage() to be replaced by something that can handle multiple multipage folios in a single transaction. Signed-off-by: David Howells <dhowells@redhat.com> cc: Herbert Xu <herbert@gondor.apana.org.au> cc: "David S. Miller" <davem@davemloft.net> cc: Eric Dumazet <edumazet@google.com> cc: Jakub Kicinski <kuba@kernel.org> cc: Paolo Abeni <pabeni@redhat.com> cc: Jens Axboe <axboe@kernel.dk> cc: Matthew Wilcox <willy@infradead.org> cc: linux-crypto@vger.kernel.org cc: netdev@vger.kernel.org --- crypto/af_alg.c | 52 ++++++++----------------------------------------- 1 file changed, 8 insertions(+), 44 deletions(-)