Line data    Source code

       1             : /* SPDX-License-Identifier: GPL-2.0-or-later */
       2             : #ifndef _LINUX_IO_URING_H
       3             : #define _LINUX_IO_URING_H
       4             : 
       5             : #include <linux/sched.h>
       6             : #include <linux/xarray.h>
       7             : #include <uapi/linux/io_uring.h>
       8             : 
       9             : enum io_uring_cmd_flags {
      10             :         IO_URING_F_COMPLETE_DEFER       = 1,
      11             :         IO_URING_F_UNLOCKED             = 2,
      12             :         /* the request is executed from poll, it should not be freed */
      13             :         IO_URING_F_MULTISHOT            = 4,
      14             :         /* executed by io-wq */
      15             :         IO_URING_F_IOWQ                 = 8,
      16             :         /* int's last bit, sign checks are usually faster than a bit test */
      17             :         IO_URING_F_NONBLOCK             = INT_MIN,
      18             : 
      19             :         /* ctx state flags, for URING_CMD */
      20             :         IO_URING_F_SQE128               = (1 << 8),
      21             :         IO_URING_F_CQE32                = (1 << 9),
      22             :         IO_URING_F_IOPOLL               = (1 << 10),
      23             : };
      24             : 
      25             : struct io_uring_cmd {
      26             :         struct file     *file;
      27             :         const struct io_uring_sqe *sqe;
      28             :         union {
      29             :                 /* callback to defer completions to task context */
      30             :                 void (*task_work_cb)(struct io_uring_cmd *cmd, unsigned);
      31             :                 /* used for polled completion */
      32             :                 void *cookie;
      33             :         };
      34             :         u32             cmd_op;
      35             :         u32             flags;
      36             :         u8              pdu[32]; /* available inline for free use */
      37             : };
      38             : 
      39             : static inline const void *io_uring_sqe_cmd(const struct io_uring_sqe *sqe)
      40             : {
      41             :         return sqe->cmd;
      42             : }
      43             : 
      44             : #if defined(CONFIG_IO_URING)
      45             : int io_uring_cmd_import_fixed(u64 ubuf, unsigned long len, int rw,
      46             :                               struct iov_iter *iter, void *ioucmd);
      47             : void io_uring_cmd_done(struct io_uring_cmd *cmd, ssize_t ret, ssize_t res2,
      48             :                         unsigned issue_flags);
      49             : void io_uring_cmd_complete_in_task(struct io_uring_cmd *ioucmd,
      50             :                         void (*task_work_cb)(struct io_uring_cmd *, unsigned));
      51             : struct sock *io_uring_get_socket(struct file *file);
      52             : void __io_uring_cancel(bool cancel_all);
      53             : void __io_uring_free(struct task_struct *tsk);
      54             : void io_uring_unreg_ringfd(void);
      55             : const char *io_uring_get_opcode(u8 opcode);
      56             : 
      57         367 : static inline void io_uring_files_cancel(void)
      58             : {
      59         367 :         if (current->io_uring) {
      60           0 :                 io_uring_unreg_ringfd();
      61           0 :                 __io_uring_cancel(false);
      62             :         }
      63         367 : }
      64             : static inline void io_uring_task_cancel(void)
      65             : {
      66           0 :         if (current->io_uring)
      67           0 :                 __io_uring_cancel(true);
      68             : }
      69             : static inline void io_uring_free(struct task_struct *tsk)
      70             : {
      71         366 :         if (tsk->io_uring)
      72           0 :                 __io_uring_free(tsk);
      73             : }
      74             : #else
      75             : static inline int io_uring_cmd_import_fixed(u64 ubuf, unsigned long len, int rw,
      76             :                               struct iov_iter *iter, void *ioucmd)
      77             : {
      78             :         return -EOPNOTSUPP;
      79             : }
      80             : static inline void io_uring_cmd_done(struct io_uring_cmd *cmd, ssize_t ret,
      81             :                 ssize_t ret2, unsigned issue_flags)
      82             : {
      83             : }
      84             : static inline void io_uring_cmd_complete_in_task(struct io_uring_cmd *ioucmd,
      85             :                         void (*task_work_cb)(struct io_uring_cmd *, unsigned))
      86             : {
      87             : }
      88             : static inline struct sock *io_uring_get_socket(struct file *file)
      89             : {
      90             :         return NULL;
      91             : }
      92             : static inline void io_uring_task_cancel(void)
      93             : {
      94             : }
      95             : static inline void io_uring_files_cancel(void)
      96             : {
      97             : }
      98             : static inline void io_uring_free(struct task_struct *tsk)
      99             : {
     100             : }
     101             : static inline const char *io_uring_get_opcode(u8 opcode)
     102             : {
     103             :         return "";
     104             : }
     105             : #endif
     106             : 
     107             : #endif