diff options
Diffstat (limited to 'tools/io_uring/liburing.h')
| -rw-r--r-- | tools/io_uring/liburing.h | 183 |
1 files changed, 0 insertions, 183 deletions
diff --git a/tools/io_uring/liburing.h b/tools/io_uring/liburing.h deleted file mode 100644 index 5f305c86b892..000000000000 --- a/tools/io_uring/liburing.h +++ /dev/null @@ -1,183 +0,0 @@ -#ifndef LIB_URING_H -#define LIB_URING_H - -#ifdef __cplusplus -extern "C" { -#endif - -#include <sys/uio.h> -#include <signal.h> -#include <string.h> -#include "../../include/uapi/linux/io_uring.h" -#include <inttypes.h> -#include "barrier.h" - -/* - * Library interface to io_uring - */ -struct io_uring_sq { - unsigned *khead; - unsigned *ktail; - unsigned *kring_mask; - unsigned *kring_entries; - unsigned *kflags; - unsigned *kdropped; - unsigned *array; - struct io_uring_sqe *sqes; - - unsigned sqe_head; - unsigned sqe_tail; - - size_t ring_sz; -}; - -struct io_uring_cq { - unsigned *khead; - unsigned *ktail; - unsigned *kring_mask; - unsigned *kring_entries; - unsigned *koverflow; - struct io_uring_cqe *cqes; - - size_t ring_sz; -}; - -struct io_uring { - struct io_uring_sq sq; - struct io_uring_cq cq; - int ring_fd; -}; - -/* - * System calls - */ -extern int io_uring_setup(unsigned entries, struct io_uring_params *p); -extern int io_uring_enter(int fd, unsigned to_submit, - unsigned min_complete, unsigned flags, sigset_t *sig); -extern int io_uring_register(int fd, unsigned int opcode, void *arg, - unsigned int nr_args); - -/* - * Library interface - */ -extern int io_uring_queue_init(unsigned entries, struct io_uring *ring, - unsigned flags); -extern int io_uring_queue_mmap(int fd, struct io_uring_params *p, - struct io_uring *ring); -extern void io_uring_queue_exit(struct io_uring *ring); -extern int io_uring_peek_cqe(struct io_uring *ring, - struct io_uring_cqe **cqe_ptr); -extern int io_uring_wait_cqe(struct io_uring *ring, - struct io_uring_cqe **cqe_ptr); -extern int io_uring_submit(struct io_uring *ring); -extern struct io_uring_sqe *io_uring_get_sqe(struct io_uring *ring); - -/* - * Must be called after io_uring_{peek,wait}_cqe() after the cqe has - * been processed by the application. - */ -static inline void io_uring_cqe_seen(struct io_uring *ring, - struct io_uring_cqe *cqe) -{ - if (cqe) { - struct io_uring_cq *cq = &ring->cq; - - (*cq->khead)++; - /* - * Ensure that the kernel sees our new head, the kernel has - * the matching read barrier. - */ - write_barrier(); - } -} - -/* - * Command prep helpers - */ -static inline void io_uring_sqe_set_data(struct io_uring_sqe *sqe, void *data) -{ - sqe->user_data = (unsigned long) data; -} - -static inline void *io_uring_cqe_get_data(struct io_uring_cqe *cqe) -{ - return (void *) (uintptr_t) cqe->user_data; -} - -static inline void io_uring_prep_rw(int op, struct io_uring_sqe *sqe, int fd, - const void *addr, unsigned len, - off_t offset) -{ - memset(sqe, 0, sizeof(*sqe)); - sqe->opcode = op; - sqe->fd = fd; - sqe->off = offset; - sqe->addr = (unsigned long) addr; - sqe->len = len; -} - -static inline void io_uring_prep_readv(struct io_uring_sqe *sqe, int fd, - const struct iovec *iovecs, - unsigned nr_vecs, off_t offset) -{ - io_uring_prep_rw(IORING_OP_READV, sqe, fd, iovecs, nr_vecs, offset); -} - -static inline void io_uring_prep_read_fixed(struct io_uring_sqe *sqe, int fd, - void *buf, unsigned nbytes, - off_t offset) -{ - io_uring_prep_rw(IORING_OP_READ_FIXED, sqe, fd, buf, nbytes, offset); -} - -static inline void io_uring_prep_writev(struct io_uring_sqe *sqe, int fd, - const struct iovec *iovecs, - unsigned nr_vecs, off_t offset) -{ - io_uring_prep_rw(IORING_OP_WRITEV, sqe, fd, iovecs, nr_vecs, offset); -} - -static inline void io_uring_prep_write_fixed(struct io_uring_sqe *sqe, int fd, - const void *buf, unsigned nbytes, - off_t offset) -{ - io_uring_prep_rw(IORING_OP_WRITE_FIXED, sqe, fd, buf, nbytes, offset); -} - -static inline void io_uring_prep_poll_add(struct io_uring_sqe *sqe, int fd, - short poll_mask) -{ - memset(sqe, 0, sizeof(*sqe)); - sqe->opcode = IORING_OP_POLL_ADD; - sqe->fd = fd; - sqe->poll_events = poll_mask; -} - -static inline void io_uring_prep_poll_remove(struct io_uring_sqe *sqe, - void *user_data) -{ - memset(sqe, 0, sizeof(*sqe)); - sqe->opcode = IORING_OP_POLL_REMOVE; - sqe->addr = (unsigned long) user_data; -} - -static inline void io_uring_prep_fsync(struct io_uring_sqe *sqe, int fd, - unsigned fsync_flags) -{ - memset(sqe, 0, sizeof(*sqe)); - sqe->opcode = IORING_OP_FSYNC; - sqe->fd = fd; - sqe->fsync_flags = fsync_flags; -} - -static inline void io_uring_prep_nop(struct io_uring_sqe *sqe) -{ - memset(sqe, 0, sizeof(*sqe)); - sqe->opcode = IORING_OP_NOP; -} - -#ifdef __cplusplus -} -#endif - -#endif |