-/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+/* SPDX-License-Identifier: (GPL-2.0 WITH Linux-syscall-note) OR MIT */
/*
* Header file for the io_uring interface.
*
#include <linux/fs.h>
#include <linux/types.h>
+#ifdef __cplusplus
+extern "C" {
+#endif
+
/*
* IO submission data structure (Submission Queue Entry)
*/
__u64 off; /* offset into file */
__u64 addr2;
};
- __u64 addr; /* pointer to buffer or iovecs */
+ union {
+ __u64 addr; /* pointer to buffer or iovecs */
+ __u64 splice_off_in;
+ };
__u32 len; /* buffer size or number of iovecs */
union {
__kernel_rwf_t rw_flags;
__u32 fsync_flags;
- __u16 poll_events;
+ __u16 poll_events; /* compatibility */
+ __u32 poll32_events; /* word-reversed for BE */
__u32 sync_range_flags;
__u32 msg_flags;
__u32 timeout_flags;
__u32 cancel_flags;
__u32 open_flags;
__u32 statx_flags;
+ __u32 fadvise_advice;
+ __u32 splice_flags;
};
__u64 user_data; /* data to be passed back at completion time */
union {
- __u16 buf_index; /* index into fixed buffers, if used */
+ struct {
+ /* pack this to avoid bogus arm OABI complaints */
+ union {
+ /* index into fixed buffers, if used */
+ __u16 buf_index;
+ /* for grouped buffer selection */
+ __u16 buf_group;
+ } __attribute__((packed));
+ /* personality to use, if used */
+ __u16 personality;
+ __s32 splice_fd_in;
+ };
__u64 __pad2[3];
};
};
+enum {
+ IOSQE_FIXED_FILE_BIT,
+ IOSQE_IO_DRAIN_BIT,
+ IOSQE_IO_LINK_BIT,
+ IOSQE_IO_HARDLINK_BIT,
+ IOSQE_ASYNC_BIT,
+ IOSQE_BUFFER_SELECT_BIT,
+};
+
/*
* sqe->flags
*/
-#define IOSQE_FIXED_FILE (1U << 0) /* use fixed fileset */
-#define IOSQE_IO_DRAIN (1U << 1) /* issue after inflight IO */
-#define IOSQE_IO_LINK (1U << 2) /* links next sqe */
-#define IOSQE_IO_HARDLINK (1U << 3) /* like LINK, but stronger */
-#define IOSQE_ASYNC (1U << 4) /* always go async */
+/* use fixed fileset */
+#define IOSQE_FIXED_FILE (1U << IOSQE_FIXED_FILE_BIT)
+/* issue after inflight IO */
+#define IOSQE_IO_DRAIN (1U << IOSQE_IO_DRAIN_BIT)
+/* links next sqe */
+#define IOSQE_IO_LINK (1U << IOSQE_IO_LINK_BIT)
+/* like LINK, but stronger */
+#define IOSQE_IO_HARDLINK (1U << IOSQE_IO_HARDLINK_BIT)
+/* always go async */
+#define IOSQE_ASYNC (1U << IOSQE_ASYNC_BIT)
+/* select buffer from sqe->buf_group */
+#define IOSQE_BUFFER_SELECT (1U << IOSQE_BUFFER_SELECT_BIT)
/*
* io_uring_setup() flags
#define IORING_SETUP_SQPOLL (1U << 1) /* SQ poll thread */
#define IORING_SETUP_SQ_AFF (1U << 2) /* sq_thread_cpu is valid */
#define IORING_SETUP_CQSIZE (1U << 3) /* app defines CQ size */
+#define IORING_SETUP_CLAMP (1U << 4) /* clamp SQ/CQ ring sizes */
+#define IORING_SETUP_ATTACH_WQ (1U << 5) /* attach to existing wq */
enum {
IORING_OP_NOP,
IORING_OP_STATX,
IORING_OP_READ,
IORING_OP_WRITE,
+ IORING_OP_FADVISE,
+ IORING_OP_MADVISE,
+ IORING_OP_SEND,
+ IORING_OP_RECV,
+ IORING_OP_OPENAT2,
+ IORING_OP_EPOLL_CTL,
+ IORING_OP_SPLICE,
+ IORING_OP_PROVIDE_BUFFERS,
+ IORING_OP_REMOVE_BUFFERS,
+ IORING_OP_TEE,
/* this goes last, obviously */
IORING_OP_LAST,
*/
#define IORING_TIMEOUT_ABS (1U << 0)
+/*
+ * sqe->splice_flags
+ * extends splice(2) flags
+ */
+#define SPLICE_F_FD_IN_FIXED (1U << 31) /* the last bit of __u32 */
+
/*
* IO completion data structure (Completion Queue Entry)
*/
__u32 flags;
};
+/*
+ * cqe->flags
+ *
+ * IORING_CQE_F_BUFFER If set, the upper 16 bits are the buffer ID
+ */
+#define IORING_CQE_F_BUFFER (1U << 0)
+
+enum {
+ IORING_CQE_BUFFER_SHIFT = 16,
+};
+
/*
* Magic offsets for the application to mmap the data it needs
*/
* sq_ring->flags
*/
#define IORING_SQ_NEED_WAKEUP (1U << 0) /* needs io_uring_enter wakeup */
+#define IORING_SQ_CQ_OVERFLOW (1U << 1) /* CQ ring is overflown */
struct io_cqring_offsets {
__u32 head;
__u32 ring_entries;
__u32 overflow;
__u32 cqes;
- __u64 resv[2];
+ __u32 flags;
+ __u32 resv1;
+ __u64 resv2;
};
+/*
+ * cq_ring->flags
+ */
+
+/* disable eventfd notifications */
+#define IORING_CQ_EVENTFD_DISABLED (1U << 0)
+
/*
* io_uring_enter(2) flags
*/
__u32 sq_thread_cpu;
__u32 sq_thread_idle;
__u32 features;
- __u32 resv[4];
+ __u32 wq_fd;
+ __u32 resv[3];
struct io_sqring_offsets sq_off;
struct io_cqring_offsets cq_off;
};
#define IORING_FEAT_SINGLE_MMAP (1U << 0)
#define IORING_FEAT_NODROP (1U << 1)
#define IORING_FEAT_SUBMIT_STABLE (1U << 2)
+#define IORING_FEAT_RW_CUR_POS (1U << 3)
+#define IORING_FEAT_CUR_PERSONALITY (1U << 4)
+#define IORING_FEAT_FAST_POLL (1U << 5)
+#define IORING_FEAT_POLL_32BITS (1U << 6)
/*
* io_uring_register(2) opcodes and arguments
#define IORING_REGISTER_EVENTFD 4
#define IORING_UNREGISTER_EVENTFD 5
#define IORING_REGISTER_FILES_UPDATE 6
+#define IORING_REGISTER_EVENTFD_ASYNC 7
+#define IORING_REGISTER_PROBE 8
+#define IORING_REGISTER_PERSONALITY 9
+#define IORING_UNREGISTER_PERSONALITY 10
struct io_uring_files_update {
__u32 offset;
- __s32 *fds;
+ __u32 resv;
+ __aligned_u64 /* __s32 * */ fds;
};
+#define IO_URING_OP_SUPPORTED (1U << 0)
+
+struct io_uring_probe_op {
+ __u8 op;
+ __u8 resv;
+ __u16 flags; /* IO_URING_OP_* flags */
+ __u32 resv2;
+};
+
+struct io_uring_probe {
+ __u8 last_op; /* last opcode supported */
+ __u8 ops_len; /* length of ops[] array below */
+ __u16 resv;
+ __u32 resv2[3];
+ struct io_uring_probe_op ops[0];
+};
+
+#ifdef __cplusplus
+}
+#endif
+
#endif
projects / fio.git / blobdiff