forked from mirrors/linux
8e9fad0e70
Enable io_uring commands on network sockets. Create two new SOCKET_URING_OP commands that will operate on sockets. In order to call ioctl on sockets, use the file_operations->io_uring_cmd callbacks, and map it to a uring socket function, which handles the SOCKET_URING_OP accordingly, and calls socket ioctls. This patches was tested by creating a new test case in liburing. Link: https://github.com/leitao/liburing/tree/io_uring_cmd Signed-off-by: Breno Leitao <leitao@debian.org> Acked-by: Jakub Kicinski <kuba@kernel.org> Link: https://lore.kernel.org/r/20230627134424.2784797-1-leitao@debian.org Signed-off-by: Jens Axboe <axboe@kernel.dk>
127 lines
3.4 KiB
C
127 lines
3.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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#ifndef _LINUX_IO_URING_H
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#define _LINUX_IO_URING_H
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#include <linux/sched.h>
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#include <linux/xarray.h>
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#include <uapi/linux/io_uring.h>
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enum io_uring_cmd_flags {
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IO_URING_F_COMPLETE_DEFER = 1,
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IO_URING_F_UNLOCKED = 2,
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/* the request is executed from poll, it should not be freed */
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IO_URING_F_MULTISHOT = 4,
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/* executed by io-wq */
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IO_URING_F_IOWQ = 8,
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/* int's last bit, sign checks are usually faster than a bit test */
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IO_URING_F_NONBLOCK = INT_MIN,
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/* ctx state flags, for URING_CMD */
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IO_URING_F_SQE128 = (1 << 8),
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IO_URING_F_CQE32 = (1 << 9),
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IO_URING_F_IOPOLL = (1 << 10),
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};
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struct io_uring_cmd {
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struct file *file;
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const struct io_uring_sqe *sqe;
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union {
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/* callback to defer completions to task context */
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void (*task_work_cb)(struct io_uring_cmd *cmd, unsigned);
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/* used for polled completion */
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void *cookie;
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};
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u32 cmd_op;
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u32 flags;
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u8 pdu[32]; /* available inline for free use */
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};
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static inline const void *io_uring_sqe_cmd(const struct io_uring_sqe *sqe)
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{
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return sqe->cmd;
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}
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#if defined(CONFIG_IO_URING)
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int io_uring_cmd_import_fixed(u64 ubuf, unsigned long len, int rw,
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struct iov_iter *iter, void *ioucmd);
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void io_uring_cmd_done(struct io_uring_cmd *cmd, ssize_t ret, ssize_t res2,
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unsigned issue_flags);
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struct sock *io_uring_get_socket(struct file *file);
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void __io_uring_cancel(bool cancel_all);
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void __io_uring_free(struct task_struct *tsk);
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void io_uring_unreg_ringfd(void);
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const char *io_uring_get_opcode(u8 opcode);
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void __io_uring_cmd_do_in_task(struct io_uring_cmd *ioucmd,
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void (*task_work_cb)(struct io_uring_cmd *, unsigned),
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unsigned flags);
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/* users should follow semantics of IOU_F_TWQ_LAZY_WAKE */
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void io_uring_cmd_do_in_task_lazy(struct io_uring_cmd *ioucmd,
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void (*task_work_cb)(struct io_uring_cmd *, unsigned));
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static inline void io_uring_cmd_complete_in_task(struct io_uring_cmd *ioucmd,
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void (*task_work_cb)(struct io_uring_cmd *, unsigned))
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{
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__io_uring_cmd_do_in_task(ioucmd, task_work_cb, 0);
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}
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static inline void io_uring_files_cancel(void)
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{
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if (current->io_uring) {
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io_uring_unreg_ringfd();
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__io_uring_cancel(false);
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}
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}
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static inline void io_uring_task_cancel(void)
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{
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if (current->io_uring)
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__io_uring_cancel(true);
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}
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static inline void io_uring_free(struct task_struct *tsk)
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{
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if (tsk->io_uring)
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__io_uring_free(tsk);
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}
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int io_uring_cmd_sock(struct io_uring_cmd *cmd, unsigned int issue_flags);
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#else
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static inline int io_uring_cmd_import_fixed(u64 ubuf, unsigned long len, int rw,
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struct iov_iter *iter, void *ioucmd)
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{
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return -EOPNOTSUPP;
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}
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static inline void io_uring_cmd_done(struct io_uring_cmd *cmd, ssize_t ret,
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ssize_t ret2, unsigned issue_flags)
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{
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}
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static inline void io_uring_cmd_complete_in_task(struct io_uring_cmd *ioucmd,
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void (*task_work_cb)(struct io_uring_cmd *, unsigned))
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{
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}
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static inline void io_uring_cmd_do_in_task_lazy(struct io_uring_cmd *ioucmd,
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void (*task_work_cb)(struct io_uring_cmd *, unsigned))
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{
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}
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static inline struct sock *io_uring_get_socket(struct file *file)
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{
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return NULL;
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}
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static inline void io_uring_task_cancel(void)
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{
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}
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static inline void io_uring_files_cancel(void)
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{
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}
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static inline void io_uring_free(struct task_struct *tsk)
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{
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}
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static inline const char *io_uring_get_opcode(u8 opcode)
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{
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return "";
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}
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static inline int io_uring_cmd_sock(struct io_uring_cmd *cmd,
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unsigned int issue_flags)
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{
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return -EOPNOTSUPP;
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}
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#endif
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#endif
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