fail io_uring zc with sockets not supporting it
Status from this message: This series was applied to netdev/net.git (master)
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Patches in v1 All 3 applied
| # | Subject and files | Size | Replies | Applied |
|---|---|---|---|---|
| 1/3 | net: flag sockets supporting msghdr originated zerocopyinclude/ net/ net/ | +3 | 7 replies | Applied |
| 2/3 | io_uring/net: fail zc send when unsupported by socketio_uring/ | +2 | 0 replies | Applied |
| 3/3 | io_uring/net: fail zc sendmsg when unsupported by socketio_uring/ | +2 | 0 replies | Applied |
Reviews trailers per patch
1 of 3 patches has a Reviewed-by or Acked-by.
| Patch | Jakub Kicinski |
|---|---|
| 1/3 | A-b |
| 2/3 | |
| 3/3 |
Trailers given in replies are filled; those carried in the patches from earlier versions are outlined with dashes.
Cover letter [PATCH for-6.1 0/3] fail io_uring zc with sockets not supporting it
Some sockets don't care about msghdr::ubuf_info and would execute the request by copying data. Such fallback behaviour was always a pain in my experience, so we'd rather want to fail such requests and have a more robust api in the future.
Mark struct socket that support it with a new SOCK_SUPPORT_ZC flag. I'm not entirely sure it's the best place for the flag but at least we don't have to do a bunch of extra dereferences in the hot path.
P.S. patches 2 and 3 are not combined for backporting purposes.
Pavel Begunkov (3):
net: flag sockets supporting msghdr originated zerocopy io_uring/net: fail zc send when unsupported by socket io_uring/net: fail zc sendmsg when unsupported by socket
include/linux/net.h | 1 + io_uring/net.c | 4 ++++ net/ipv4/tcp.c | 1 + net/ipv4/udp.c | 1 + 4 files changed, 7 insertions(+)
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2.38.0