io_uring/opdef.h

   1 // SPDX-License-Identifier: GPL-2.0
   2 #ifndef IOU_OP_DEF_H
   3 #define IOU_OP_DEF_H
   4
   5 struct io_issue_def {
   6         /* needs req->file assigned */
   7         unsigned                needs_file : 1;
   8         /* should block plug */
   9         unsigned                plug : 1;
  10         /* hash wq insertion if file is a regular file */
  11         unsigned                hash_reg_file : 1;
  12         /* unbound wq insertion if file is a non-regular file */
  13         unsigned                unbound_nonreg_file : 1;
  14         /* set if opcode supports polled "wait" */
  15         unsigned                pollin : 1;
  16         unsigned                pollout : 1;
  17         unsigned                poll_exclusive : 1;
  18         /* op supports buffer selection */
  19         unsigned                buffer_select : 1;
  20         /* opcode is not supported by this kernel */
  21         unsigned                not_supported : 1;
  22         /* skip auditing */
  23         unsigned                audit_skip : 1;
  24         /* supports ioprio */
  25         unsigned                ioprio : 1;
  26         /* supports iopoll */
  27         unsigned                iopoll : 1;
  28         /* have to be put into the iopoll list */
  29         unsigned                iopoll_queue : 1;
  30         /* opcode specific path will handle ->async_data allocation if needed */
  31         unsigned                manual_alloc : 1;
  32
  33         int (*issue)(struct io_kiocb *, unsigned int);
  34         int (*prep)(struct io_kiocb *, const struct io_uring_sqe *);
  35 };
  36
  37 struct io_cold_def {
  38         /* size of async data needed, if any */
  39         unsigned short          async_size;
  40
  41         const char              *name;
  42
  43         int (*prep_async)(struct io_kiocb *);
  44         void (*cleanup)(struct io_kiocb *);
  45         void (*fail)(struct io_kiocb *);
  46 };
  47
  48 extern const struct io_issue_def io_issue_defs[];
  49 extern const struct io_cold_def io_cold_defs[];
  50
  51 void io_uring_optable_init(void);
  52 #endif