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selftests/io_uring: support NO_SQARRAY in miniliburing

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Add support for IORING_SETUP_NO_SQARRAY in miniliburing.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Pavel Begunkov
2026-01-20 21:11:45 +00:00
committed by Jens Axboe
parent 73061dbeca
commit 145e007439
1 changed files with 27 additions and 7 deletions
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34
tools/include/io_uring/mini_liburing.h
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@@ -6,6 +6,7 @@
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <sys/uio.h>
struct io_sq_ring {
unsigned int *head;
@@ -55,6 +56,7 @@ struct io_uring {
struct io_uring_sq sq;
struct io_uring_cq cq;
int ring_fd;
unsigned flags;
};
#if defined(__x86_64) || defined(__i386__)
@@ -72,7 +74,14 @@ static inline int io_uring_mmap(int fd, struct io_uring_params *p,
void *ptr;
int ret;
sq->ring_sz = p->sq_off.array + p->sq_entries * sizeof(unsigned int);
if (p->flags & IORING_SETUP_NO_SQARRAY) {
sq->ring_sz = p->cq_off.cqes;
sq->ring_sz += p->cq_entries * sizeof(struct io_uring_cqe);
} else {
sq->ring_sz = p->sq_off.array;
sq->ring_sz += p->sq_entries * sizeof(unsigned int);
}
ptr = mmap(0, sq->ring_sz, PROT_READ | PROT_WRITE,
MAP_SHARED | MAP_POPULATE, fd, IORING_OFF_SQ_RING);
if (ptr == MAP_FAILED)
@@ -83,7 +92,8 @@ static inline int io_uring_mmap(int fd, struct io_uring_params *p,
sq->kring_entries = ptr + p->sq_off.ring_entries;
sq->kflags = ptr + p->sq_off.flags;
sq->kdropped = ptr + p->sq_off.dropped;
sq->array = ptr + p->sq_off.array;
if (!(p->flags & IORING_SETUP_NO_SQARRAY))
sq->array = ptr + p->sq_off.array;
size = p->sq_entries * sizeof(struct io_uring_sqe);
sq->sqes = mmap(0, size, PROT_READ | PROT_WRITE,
@@ -138,10 +148,12 @@ static inline int io_uring_queue_init_params(unsigned int entries,
if (fd < 0)
return fd;
ret = io_uring_mmap(fd, p, &ring->sq, &ring->cq);
if (!ret)
if (!ret) {
ring->ring_fd = fd;
else
ring->flags = p->flags;
} else {
close(fd);
}
return ret;
}
@@ -208,10 +220,18 @@ static inline int io_uring_submit(struct io_uring *ring)
ktail = *sq->ktail;
to_submit = sq->sqe_tail - sq->sqe_head;
for (submitted = 0; submitted < to_submit; submitted++) {
read_barrier();
sq->array[ktail++ & mask] = sq->sqe_head++ & mask;
if (!(ring->flags & IORING_SETUP_NO_SQARRAY)) {
for (submitted = 0; submitted < to_submit; submitted++) {
read_barrier();
sq->array[ktail++ & mask] = sq->sqe_head++ & mask;
}
} else {
ktail += to_submit;
sq->sqe_head += to_submit;
submitted = to_submit;
}
if (!submitted)
return 0;