io_uring: kill io_uring userspace examples

There are tons of io_uring tests and examples in liburing and on the
Internet. If you're looking for a benchmark, io_uring-bench.c is just an
acutely outdated version of fio/io_uring. And for basic condensed init
template for likes of selftests take a peek at io_uring_zerocopy_tx.c.

Kill tools/io_uring/, it's a burden keeping it here.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/7c740701d3b475dcad8c92602a551044f72176b4.1691543666.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>

1 files changed, 0 insertions, 107 deletions

diff --git a/tools/io_uring/setup.c b/tools/io_uring/setup.c
deleted file mode 100644
index 0b50fcd78520..000000000000
--- a/tools/io_uring/setup.c
+++ /dev/null
@@ -1,107 +0,0 @@
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <sys/mman.h>
-#include <unistd.h>
-#include <errno.h>
-#include <string.h>
-
-#include "liburing.h"
-
-static int io_uring_mmap(int fd, struct io_uring_params *p,
-			 struct io_uring_sq *sq, struct io_uring_cq *cq)
-{
-	size_t size;
-	void *ptr;
-	int ret;
-
-	sq->ring_sz = p->sq_off.array + p->sq_entries * sizeof(unsigned);
-	ptr = mmap(0, sq->ring_sz, PROT_READ | PROT_WRITE,
-			MAP_SHARED | MAP_POPULATE, fd, IORING_OFF_SQ_RING);
-	if (ptr == MAP_FAILED)
-		return -errno;
-	sq->khead = ptr + p->sq_off.head;
-	sq->ktail = ptr + p->sq_off.tail;
-	sq->kring_mask = ptr + p->sq_off.ring_mask;
-	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;
-
-	size = p->sq_entries * sizeof(struct io_uring_sqe);
-	sq->sqes = mmap(0, size, PROT_READ | PROT_WRITE,
-				MAP_SHARED | MAP_POPULATE, fd,
-				IORING_OFF_SQES);
-	if (sq->sqes == MAP_FAILED) {
-		ret = -errno;
-err:
-		munmap(sq->khead, sq->ring_sz);
-		return ret;
-	}
-
-	cq->ring_sz = p->cq_off.cqes + p->cq_entries * sizeof(struct io_uring_cqe);
-	ptr = mmap(0, cq->ring_sz, PROT_READ | PROT_WRITE,
-			MAP_SHARED | MAP_POPULATE, fd, IORING_OFF_CQ_RING);
-	if (ptr == MAP_FAILED) {
-		ret = -errno;
-		munmap(sq->sqes, p->sq_entries * sizeof(struct io_uring_sqe));
-		goto err;
-	}
-	cq->khead = ptr + p->cq_off.head;
-	cq->ktail = ptr + p->cq_off.tail;
-	cq->kring_mask = ptr + p->cq_off.ring_mask;
-	cq->kring_entries = ptr + p->cq_off.ring_entries;
-	cq->koverflow = ptr + p->cq_off.overflow;
-	cq->cqes = ptr + p->cq_off.cqes;
-	return 0;
-}
-
-/*
- * For users that want to specify sq_thread_cpu or sq_thread_idle, this
- * interface is a convenient helper for mmap()ing the rings.
- * Returns -1 on error, or zero on success.  On success, 'ring'
- * contains the necessary information to read/write to the rings.
- */
-int io_uring_queue_mmap(int fd, struct io_uring_params *p, struct io_uring *ring)
-{
-	int ret;
-
-	memset(ring, 0, sizeof(*ring));
-	ret = io_uring_mmap(fd, p, &ring->sq, &ring->cq);
-	if (!ret)
-		ring->ring_fd = fd;
-	return ret;
-}
-
-/*
- * Returns -1 on error, or zero on success. On success, 'ring'
- * contains the necessary information to read/write to the rings.
- */
-int io_uring_queue_init(unsigned entries, struct io_uring *ring, unsigned flags)
-{
-	struct io_uring_params p;
-	int fd, ret;
-
-	memset(&p, 0, sizeof(p));
-	p.flags = flags;
-
-	fd = io_uring_setup(entries, &p);
-	if (fd < 0)
-		return fd;
-
-	ret = io_uring_queue_mmap(fd, &p, ring);
-	if (ret)
-		close(fd);
-
-	return ret;
-}
-
-void io_uring_queue_exit(struct io_uring *ring)
-{
-	struct io_uring_sq *sq = &ring->sq;
-	struct io_uring_cq *cq = &ring->cq;
-
-	munmap(sq->sqes, *sq->kring_entries * sizeof(struct io_uring_sqe));
-	munmap(sq->khead, sq->ring_sz);
-	munmap(cq->khead, cq->ring_sz);
-	close(ring->ring_fd);
-}