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liburing: include the ring fd in the io_uring

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No point in keeping these separate.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Jens Axboe
2019-01-08 15:59:09 -07:00
parent baa8d243cc
commit 66a7d05bd8
4 changed files with 47 additions and 50 deletions
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30
src/io_uring.c
View File

@@ -42,19 +42,19 @@ static int __io_uring_get_completion(int fd, struct io_uring_cq *cq,
/*
* Return an IO completion, if one is readily available
*/
int io_uring_get_completion(int fd, struct io_uring *ring,
int io_uring_get_completion(struct io_uring *ring,
struct io_uring_event **ev_ptr)
{
return __io_uring_get_completion(fd, &ring->cq, ev_ptr, 0);
return __io_uring_get_completion(ring->ring_fd, &ring->cq, ev_ptr, 0);
}
/*
* Return an IO completion, waiting for it if necessary
*/
int io_uring_wait_completion(int fd, struct io_uring *ring,
int io_uring_wait_completion(struct io_uring *ring,
struct io_uring_event **ev_ptr)
{
return __io_uring_get_completion(fd, &ring->cq, ev_ptr, 1);
return __io_uring_get_completion(ring->ring_fd, &ring->cq, ev_ptr, 1);
}
/*
@@ -62,7 +62,7 @@ int io_uring_wait_completion(int fd, struct io_uring *ring,
*
* Returns number of iocbs submitted
*/
int io_uring_submit(int fd, struct io_uring *ring)
int io_uring_submit(struct io_uring *ring)
{
struct io_uring_sq *sq = &ring->sq;
const unsigned mask = *sq->kring_mask;
@@ -108,7 +108,8 @@ int io_uring_submit(int fd, struct io_uring *ring)
}
submit:
return io_uring_enter(fd, submitted, 0, IORING_ENTER_GETEVENTS);
return io_uring_enter(ring->ring_fd, submitted, 0,
IORING_ENTER_GETEVENTS);
}
/*
@@ -180,27 +181,30 @@ err:
cq->kring_entries = ptr + p->cq_off.ring_entries;
cq->koverflow = ptr + p->cq_off.overflow;
cq->events = ptr + p->cq_off.events;
return fd;
return 0;
}
/*
* Returns -1 on error, or an 'fd' on success. On success, 'sq' and 'cq'
* contain the necessary information to read/write to 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_init(unsigned entries, struct io_uring_params *p,
struct iovec *iovecs, struct io_uring *ring)
{
int fd;
int fd, ret;
fd = io_uring_setup(entries, iovecs, p);
if (fd < 0)
return fd;
memset(ring, 0, sizeof(*ring));
return io_uring_mmap(fd, p, &ring->sq, &ring->cq);
ret = io_uring_mmap(fd, p, &ring->sq, &ring->cq);
if (!ret)
ring->ring_fd = fd;
return ret;
}
void io_uring_queue_exit(int fd, struct io_uring *ring)
void io_uring_queue_exit(struct io_uring *ring)
{
struct io_uring_sq *sq = &ring->sq;
struct io_uring_cq *cq = &ring->cq;
@@ -208,5 +212,5 @@ void io_uring_queue_exit(int fd, struct io_uring *ring)
munmap(sq->iocbs, *sq->kring_entries * sizeof(struct io_uring_iocb));
munmap(sq->khead, sq->ring_sz);
munmap(cq->khead, cq->ring_sz);
close(fd);
close(ring->ring_fd);
}

9
src/liburing.h
View File

@@ -37,6 +37,7 @@ struct io_uring_cq {
struct io_uring {
struct io_uring_sq sq;
struct io_uring_cq cq;
int ring_fd;
};
/*
@@ -52,12 +53,12 @@ extern int io_uring_enter(unsigned fd, unsigned to_submit,
*/
extern int io_uring_queue_init(unsigned entries, struct io_uring_params *p,
struct iovec *iovecs, struct io_uring *ring);
extern void io_uring_queue_exit(int fd, struct io_uring *ring);
extern int io_uring_get_completion(int fd, struct io_uring *ring,
extern void io_uring_queue_exit(struct io_uring *ring);
extern int io_uring_get_completion(struct io_uring *ring,
struct io_uring_event **ev_ptr);
extern int io_uring_wait_completion(int fd, struct io_uring *ring,
extern int io_uring_wait_completion(struct io_uring *ring,
struct io_uring_event **ev_ptr);
extern int io_uring_submit(int fd, struct io_uring *ring);
extern int io_uring_submit(struct io_uring *ring);
extern struct io_uring_iocb *io_uring_get_iocb(struct io_uring *ring);
static inline struct io_uring_iocb *

44
test/io_uring-cp.c
View File

@@ -14,31 +14,25 @@
#define QD 64
#define BS 4096
struct ring {
struct io_uring uring;
int fd;
};
static struct ring in_ring;
static struct ring out_ring;
static struct io_uring in_ring;
static struct io_uring out_ring;
static void *bufs[QD];
static int setup_context(unsigned entries, struct ring *r, int offload)
static int setup_context(unsigned entries, struct io_uring *ring, int offload)
{
struct io_uring_params p;
int ring_fd;
int ret;
memset(&p, 0, sizeof(p));
if (offload)
p.flags = IORING_SETUP_SQWQ;
ring_fd = io_uring_queue_init(entries, &p, NULL, &r->uring);
if (ring_fd < 0) {
fprintf(stderr, "queue_init: %s\n", strerror(-ring_fd));
ret = io_uring_queue_init(entries, &p, NULL, ring);
if (ret < 0) {
fprintf(stderr, "queue_init: %s\n", strerror(-ret));
return -1;
}
r->fd = ring_fd;
return 0;
}
@@ -58,14 +52,14 @@ static int get_file_size(int fd, off_t *size)
static unsigned iocb_index(struct io_uring_iocb *iocb)
{
return iocb - in_ring.uring.sq.iocbs;
return iocb - in_ring.sq.iocbs;
}
static int queue_read(int fd, off_t size, off_t offset)
{
struct io_uring_iocb *iocb;
iocb = io_uring_get_iocb(&in_ring.uring);
iocb = io_uring_get_iocb(&in_ring);
if (!iocb)
return 1;
@@ -83,7 +77,7 @@ static int complete_writes(unsigned *writes)
{
int ret, nr;
ret = io_uring_submit(out_ring.fd, &out_ring.uring);
ret = io_uring_submit(&out_ring);
if (ret < 0) {
fprintf(stderr, "io_uring_submit: %s\n", strerror(-ret));
return 1;
@@ -93,7 +87,7 @@ static int complete_writes(unsigned *writes)
while (nr) {
struct io_uring_event *ev = NULL;
ret = io_uring_wait_completion(out_ring.fd, &out_ring.uring, &ev);
ret = io_uring_wait_completion(&out_ring, &ev);
if (ret < 0) {
fprintf(stderr, "io_uring_wait_completion: %s\n",
strerror(-ret));
@@ -114,7 +108,7 @@ static void queue_write(int fd, off_t size, off_t offset, unsigned index)
{
struct io_uring_iocb *iocb;
iocb = io_uring_get_iocb(&out_ring.uring);
iocb = io_uring_get_iocb(&out_ring);
iocb->opcode = IORING_OP_WRITE;
iocb->flags = 0;
iocb->ioprio = 0;
@@ -180,7 +174,7 @@ int main(int argc, char *argv[])
}
skip_read:
ret = io_uring_submit(in_ring.fd, &in_ring.uring);
ret = io_uring_submit(&in_ring);
if (ret < 0) {
fprintf(stderr, "io_uring_submit: %s\n", strerror(-ret));
break;
@@ -192,11 +186,9 @@ skip_read:
*/
while (reads || write_left) {
if (reads)
ret = io_uring_wait_completion(in_ring.fd,
&in_ring.uring, &ev);
ret = io_uring_wait_completion(&in_ring, &ev);
else
ret = io_uring_get_completion(in_ring.fd,
&in_ring.uring, &ev);
ret = io_uring_get_completion(&in_ring, &ev);
if (ret < 0) {
fprintf(stderr, "io_uring_get_completion: %s\n",
strerror(-ret));
@@ -210,7 +202,7 @@ skip_read:
strerror(-ev->res));
return 1;
}
iocb = io_uring_iocb_from_ev(&in_ring.uring, ev);
iocb = io_uring_iocb_from_ev(&in_ring, ev);
queue_write(outfd, ev->res, iocb->off, ev->index);
write_left -= ev->res;
writes++;
@@ -221,7 +213,7 @@ skip_read:
close(infd);
close(outfd);
io_uring_queue_exit(in_ring.fd, &in_ring.uring);
io_uring_queue_exit(out_ring.fd, &out_ring.uring);
io_uring_queue_exit(&in_ring);
io_uring_queue_exit(&out_ring);
return 0;
}

14
test/io_uring-test.c
View File

@@ -15,7 +15,7 @@ int main(int argc, char *argv[])
{
struct io_uring_params p;
struct io_uring ring;
int i, fd, ring_fd, ret, pending, done;
int i, fd, ret, pending, done;
struct io_uring_iocb *iocb;
struct io_uring_event *ev;
off_t offset;
@@ -29,9 +29,9 @@ int main(int argc, char *argv[])
memset(&p, 0, sizeof(p));
p.flags = IORING_SETUP_IOPOLL;
ring_fd = io_uring_queue_init(4, &p, NULL, &ring);
if (ring_fd < 0) {
fprintf(stderr, "queue_init: %s\n", strerror(-ring_fd));
ret = io_uring_queue_init(4, &p, NULL, &ring);
if (ret < 0) {
fprintf(stderr, "queue_init: %s\n", strerror(-ret));
return 1;
}
@@ -59,7 +59,7 @@ int main(int argc, char *argv[])
offset += 4096;
} while (1);
ret = io_uring_submit(ring_fd, &ring);
ret = io_uring_submit(&ring);
if (ret < 0) {
fprintf(stderr, "io_uring_submit: %s\n", strerror(-ret));
return 1;
@@ -69,7 +69,7 @@ int main(int argc, char *argv[])
pending = ret;
for (i = 0; i < pending; i++) {
ev = NULL;
ret = io_uring_get_completion(ring_fd, &ring, &ev);
ret = io_uring_get_completion(&ring, &ev);
if (ret < 0) {
fprintf(stderr, "io_uring_get_completion: %s\n", strerror(-ret));
return 1;
@@ -84,6 +84,6 @@ int main(int argc, char *argv[])
printf("Submitted=%d, completed=%d\n", pending, done);
close(fd);
io_uring_queue_exit(ring_fd, &ring);
io_uring_queue_exit(&ring);
return 0;
}