diff options
| author | Gabriel Krisman Bertazi <krisman@suse.de> | 2025-11-25 16:18:01 -0500 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2025-11-26 13:45:23 -0700 |
| commit | 5d24321e4c159088604512d7a5c5cf634d23e01a (patch) | |
| tree | 6f7998c9b8faf6c6b16d63c04547022eb7d9bf7e | |
| parent | d73c1677087391379441c0bb444c7fb4238fc6e7 (diff) | |
io_uring: Introduce getsockname io_uring cmd
Introduce a socket-specific io_uring_cmd to support
getsockname/getpeername via io_uring. I made this an io_uring_cmd
instead of a new operation to avoid polluting the command namespace with
what is exclusively a socket operation. In addition, since we don't
need to conform to existing interfaces, this merges the
getsockname/getpeername in a single operation, since the implementation
is pretty much the same.
This has been frequently requested, for instance at [1] and more
recently in the project Discord channel. The main use-case is to support
fixed socket file descriptors.
[1] https://github.com/axboe/liburing/issues/1356
Signed-off-by: Gabriel Krisman Bertazi <krisman@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
| -rw-r--r-- | include/uapi/linux/io_uring.h | 1 | ||||
| -rw-r--r-- | io_uring/cmd_net.c | 22 |
2 files changed, 23 insertions, 0 deletions
diff --git a/include/uapi/linux/io_uring.h b/include/uapi/linux/io_uring.h index deb772222b6d..b5b23c0d5283 100644 --- a/include/uapi/linux/io_uring.h +++ b/include/uapi/linux/io_uring.h @@ -1009,6 +1009,7 @@ enum io_uring_socket_op { SOCKET_URING_OP_GETSOCKOPT, SOCKET_URING_OP_SETSOCKOPT, SOCKET_URING_OP_TX_TIMESTAMP, + SOCKET_URING_OP_GETSOCKNAME, }; /* diff --git a/io_uring/cmd_net.c b/io_uring/cmd_net.c index 27a09aa4c9d0..5d11caf5509c 100644 --- a/io_uring/cmd_net.c +++ b/io_uring/cmd_net.c @@ -132,6 +132,26 @@ static int io_uring_cmd_timestamp(struct socket *sock, return -EAGAIN; } +static int io_uring_cmd_getsockname(struct socket *sock, + struct io_uring_cmd *cmd, + unsigned int issue_flags) +{ + const struct io_uring_sqe *sqe = cmd->sqe; + struct sockaddr __user *uaddr; + unsigned int peer; + int __user *ulen; + + if (sqe->ioprio || sqe->__pad1 || sqe->len || sqe->rw_flags) + return -EINVAL; + + uaddr = u64_to_user_ptr(READ_ONCE(sqe->addr)); + ulen = u64_to_user_ptr(sqe->addr3); + peer = READ_ONCE(sqe->optlen); + if (peer > 1) + return -EINVAL; + return do_getsockname(sock, peer, uaddr, ulen); +} + int io_uring_cmd_sock(struct io_uring_cmd *cmd, unsigned int issue_flags) { struct socket *sock = cmd->file->private_data; @@ -159,6 +179,8 @@ int io_uring_cmd_sock(struct io_uring_cmd *cmd, unsigned int issue_flags) return io_uring_cmd_setsockopt(sock, cmd, issue_flags); case SOCKET_URING_OP_TX_TIMESTAMP: return io_uring_cmd_timestamp(sock, cmd, issue_flags); + case SOCKET_URING_OP_GETSOCKNAME: + return io_uring_cmd_getsockname(sock, cmd, issue_flags); default: return -EOPNOTSUPP; } |