95 lines
2.2 KiB
C
95 lines
2.2 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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enum io_uring_cmd_flags {
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IO_URING_F_COMPLETE_DEFER = 1,
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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 = 4,
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IO_URING_F_CQE32 = 8,
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IO_URING_F_IOPOLL = 16,
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};
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struct io_uring_cmd {
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struct file *file;
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const void *cmd;
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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);
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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 pad;
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u8 pdu[32]; /* available inline for free use */
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};
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static inline void io_uring_cmd_private_sz_check(size_t cmd_sz)
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{
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BUILD_BUG_ON(cmd_sz > sizeof_field(struct io_uring_cmd, pdu));
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}
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#define io_uring_cmd_to_pdu(cmd, pdu_type) ( \
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io_uring_cmd_private_sz_check(sizeof(pdu_type)), \
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((pdu_type *)&(cmd)->pdu) \
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)
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#if defined(CONFIG_IO_URING)
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void io_uring_cmd_done(struct io_uring_cmd *cmd, ssize_t ret, ssize_t res2);
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void io_uring_cmd_complete_in_task(struct io_uring_cmd *ioucmd,
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void (*task_work_cb)(struct io_uring_cmd *));
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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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bool io_is_uring_fops(struct file *file);
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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_cancel(false);
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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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#else
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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)
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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 *))
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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 bool io_is_uring_fops(struct file *file)
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{
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return false;
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}
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#endif
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#endif
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