| Message ID | 20230607181920.2294972-10-dhowells@redhat.com (mailing list archive) |
|---|---|
| State | Accepted |
| Commit | 951ace9951382a90a56e98590e0b9b651e7579b4 |
| Delegated to: | Netdev Maintainers |
| Headers | show |
| Series | splice, net: Rewrite splice-to-socket, fix SPLICE_F_MORE and handle MSG_SPLICE_PAGES in AF_TLS | expand |
| Context | Check | Description |
|---|---|---|
| netdev/series_format | success | Posting correctly formatted |
| netdev/tree_selection | success | Clearly marked for net-next, async |
| 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 7 of 7 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, 33 lines checked |
| netdev/kdoc | success | Errors and warnings before: 0 this patch: 0 |
| netdev/source_inline | success | Was 0 now: 0 |
diff --git a/net/kcm/kcmsock.c b/net/kcm/kcmsock.c index ba22af16b96d..7dee74430b59 100644 --- a/net/kcm/kcmsock.c +++ b/net/kcm/kcmsock.c @@ -968,6 +968,19 @@ static int kcm_sendmsg(struct socket *sock, struct msghdr *msg, size_t len) return err; } +static void kcm_splice_eof(struct socket *sock) +{ + struct sock *sk = sock->sk; + struct kcm_sock *kcm = kcm_sk(sk); + + if (skb_queue_empty_lockless(&sk->sk_write_queue)) + return; + + lock_sock(sk); + kcm_write_msgs(kcm); + release_sock(sk); +} + static ssize_t kcm_sendpage(struct socket *sock, struct page *page, int offset, size_t size, int flags) @@ -1773,6 +1786,7 @@ static const struct proto_ops kcm_dgram_ops = { .sendmsg = kcm_sendmsg, .recvmsg = kcm_recvmsg, .mmap = sock_no_mmap, + .splice_eof = kcm_splice_eof, .sendpage = kcm_sendpage, }; @@ -1794,6 +1808,7 @@ static const struct proto_ops kcm_seqpacket_ops = { .sendmsg = kcm_sendmsg, .recvmsg = kcm_recvmsg, .mmap = sock_no_mmap, + .splice_eof = kcm_splice_eof, .sendpage = kcm_sendpage, .splice_read = kcm_splice_read, };
Allow splice to undo the effects of MSG_MORE after prematurely ending a splice/sendfile due to getting an EOF condition (->splice_read() returned 0) after splice had called sendmsg() with MSG_MORE set when the user didn't set MSG_MORE. Suggested-by: Linus Torvalds <torvalds@linux-foundation.org> Link: https://lore.kernel.org/r/CAHk-=wh=V579PDYvkpnTobCLGczbgxpMgGmmhqiTyE34Cpi5Gg@mail.gmail.com/ Signed-off-by: David Howells <dhowells@redhat.com> cc: Tom Herbert <tom@herbertland.com> cc: Tom Herbert <tom@quantonium.net> cc: Cong Wang <cong.wang@bytedance.com> cc: Jakub Kicinski <kuba@kernel.org> cc: Eric Dumazet <edumazet@google.com> cc: "David S. Miller" <davem@davemloft.net> cc: Paolo Abeni <pabeni@redhat.com> cc: Jens Axboe <axboe@kernel.dk> cc: Matthew Wilcox <willy@infradead.org> cc: netdev@vger.kernel.org --- Notes: ver #6) - In kcm_splice_eof(), use skb_queue_empty_lockless(). net/kcm/kcmsock.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+)