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| author | Gabriel Krisman Bertazi <krisman@suse.de> | 2024-06-14 12:30:47 -0400 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2024-06-19 07:57:21 -0600 |
| commit | ff140cc8628abfb1755691d16cfa8788d8820ef7 (patch) | |
| tree | c18b9786fa8a5187fc6e44a2e03704b13993f198 /io_uring | |
| parent | 7481fd93fa0a851740e26026485f56a1305454ce (diff) | |
| download | linux-ff140cc8628abfb1755691d16cfa8788d8820ef7.tar.gz linux-ff140cc8628abfb1755691d16cfa8788d8820ef7.tar.bz2 linux-ff140cc8628abfb1755691d16cfa8788d8820ef7.zip | |
io_uring: Introduce IORING_OP_LISTEN
IORING_OP_LISTEN provides the semantic of listen(2) via io_uring. While
this is an essentially synchronous system call, the main point is to
enable a network path to execute fully with io_uring registered and
descriptorless files.
Signed-off-by: Gabriel Krisman Bertazi <krisman@suse.de>
Link: https://lore.kernel.org/r/20240614163047.31581-4-krisman@suse.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'io_uring')
| -rw-r--r-- | io_uring/net.c | 28 | ||||
| -rw-r--r-- | io_uring/net.h | 3 | ||||
| -rw-r--r-- | io_uring/opdef.c | 13 |
3 files changed, 44 insertions, 0 deletions
diff --git a/io_uring/net.c b/io_uring/net.c index 8cc4cfc2fef3..db4a4a03ce3a 100644 --- a/io_uring/net.c +++ b/io_uring/net.c @@ -56,6 +56,11 @@ struct io_bind { int addr_len; }; +struct io_listen { + struct file *file; + int backlog; +}; + struct io_sr_msg { struct file *file; union { @@ -1751,6 +1756,29 @@ int io_bind(struct io_kiocb *req, unsigned int issue_flags) return 0; } +int io_listen_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe) +{ + struct io_listen *listen = io_kiocb_to_cmd(req, struct io_listen); + + if (sqe->addr || sqe->buf_index || sqe->rw_flags || sqe->splice_fd_in || sqe->addr2) + return -EINVAL; + + listen->backlog = READ_ONCE(sqe->len); + return 0; +} + +int io_listen(struct io_kiocb *req, unsigned int issue_flags) +{ + struct io_listen *listen = io_kiocb_to_cmd(req, struct io_listen); + int ret; + + ret = __sys_listen_socket(sock_from_file(req->file), listen->backlog); + if (ret < 0) + req_set_fail(req); + io_req_set_res(req, ret, 0); + return 0; +} + void io_netmsg_cache_free(const void *entry) { struct io_async_msghdr *kmsg = (struct io_async_msghdr *) entry; diff --git a/io_uring/net.h b/io_uring/net.h index 49f9a7bc1113..52bfee05f06a 100644 --- a/io_uring/net.h +++ b/io_uring/net.h @@ -52,6 +52,9 @@ void io_send_zc_cleanup(struct io_kiocb *req); int io_bind_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe); int io_bind(struct io_kiocb *req, unsigned int issue_flags); +int io_listen_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe); +int io_listen(struct io_kiocb *req, unsigned int issue_flags); + void io_netmsg_cache_free(const void *entry); #else static inline void io_netmsg_cache_free(const void *entry) diff --git a/io_uring/opdef.c b/io_uring/opdef.c index 1424c2d9e9ef..2dd49cf22f64 100644 --- a/io_uring/opdef.c +++ b/io_uring/opdef.c @@ -505,6 +505,16 @@ const struct io_issue_def io_issue_defs[] = { .prep = io_eopnotsupp_prep, #endif }, + [IORING_OP_LISTEN] = { +#if defined(CONFIG_NET) + .needs_file = 1, + .prep = io_listen_prep, + .issue = io_listen, + .async_size = sizeof(struct io_async_msghdr), +#else + .prep = io_eopnotsupp_prep, +#endif + }, }; const struct io_cold_def io_cold_defs[] = { @@ -729,6 +739,9 @@ const struct io_cold_def io_cold_defs[] = { [IORING_OP_BIND] = { .name = "BIND", }, + [IORING_OP_LISTEN] = { + .name = "LISTEN", + }, }; const char *io_uring_get_opcode(u8 opcode) |