mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2026-06-21 15:43:21 +02:00
Pavel Begunkov
ec02fe217f
BPF programs should have no need in looking into struct io_ring_ctx, if
anything, most of such cases would be anti patterns like looking up ring
indices directly via the context.
Replace it with a new empty structure, which is just an alias to struct
io_ring_ctx. It'll create a new BTF type and fail verification if a BPF
program tries to access it (beyond the first byte). It'll also give more
flexibility for the future, and otherwise it can be made aligned with
io_ring_ctx as before with struct groups if ever needed or extended in a
different way.
Fixes: d0e437b76b ("io_uring/bpf-ops: implement loop_step with BPF struct_ops")
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://patch.msgid.link/5f6ca3649e9e0bae8667db4357e28dd00cd07901.1780394491.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
38 lines
689 B
C
38 lines
689 B
C
// SPDX-License-Identifier: GPL-2.0
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#ifndef IOU_LOOP_H
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#define IOU_LOOP_H
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#include <linux/io_uring_types.h>
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struct iou_loop_params {
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/*
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* The CQE index to wait for. Only serves as a hint and can still be
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* woken up earlier.
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*/
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__u32 cq_wait_idx;
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};
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enum {
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IOU_LOOP_CONTINUE = 0,
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IOU_LOOP_STOP,
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};
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static inline bool io_has_loop_ops(struct io_ring_ctx *ctx)
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{
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return data_race(ctx->loop_step);
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}
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int io_run_loop(struct io_ring_ctx *ctx);
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static inline struct iou_ctx *io_loop_mangle_ctx(struct io_ring_ctx *ctx)
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{
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return (struct iou_ctx *)ctx;
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}
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static inline struct io_ring_ctx *io_loop_demangle_ctx(struct iou_ctx *ctx)
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{
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return (struct io_ring_ctx *)ctx;
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}
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#endif
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