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5916943943
There are opcodes that need ->async_data only in some cases and allocation it unconditionally may hurt performance. Add an option to opdef to make move the allocation part from the core io_uring to opcode specific code. Note, we can't just set opdef->async_size to zero because there are other helpers that rely on it, e.g. io_alloc_async_data(). Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Link: https://lore.kernel.org/r/9dc62be9e88dd0ed63c48365340e8922d2498293.1661342812.git.asml.silence@gmail.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
44 lines
1.2 KiB
C
44 lines
1.2 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#ifndef IOU_OP_DEF_H
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#define IOU_OP_DEF_H
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struct io_op_def {
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/* needs req->file assigned */
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unsigned needs_file : 1;
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/* should block plug */
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unsigned plug : 1;
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/* hash wq insertion if file is a regular file */
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unsigned hash_reg_file : 1;
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/* unbound wq insertion if file is a non-regular file */
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unsigned unbound_nonreg_file : 1;
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/* set if opcode supports polled "wait" */
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unsigned pollin : 1;
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unsigned pollout : 1;
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unsigned poll_exclusive : 1;
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/* op supports buffer selection */
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unsigned buffer_select : 1;
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/* opcode is not supported by this kernel */
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unsigned not_supported : 1;
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/* skip auditing */
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unsigned audit_skip : 1;
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/* supports ioprio */
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unsigned ioprio : 1;
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/* supports iopoll */
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unsigned iopoll : 1;
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/* opcode specific path will handle ->async_data allocation if needed */
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unsigned manual_alloc : 1;
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/* size of async data needed, if any */
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unsigned short async_size;
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const char *name;
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int (*prep)(struct io_kiocb *, const struct io_uring_sqe *);
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int (*issue)(struct io_kiocb *, unsigned int);
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int (*prep_async)(struct io_kiocb *);
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void (*cleanup)(struct io_kiocb *);
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};
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extern const struct io_op_def io_op_defs[];
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void io_uring_optable_init(void);
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#endif
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