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Merge tag 'for-5.19/io_uring-passthrough-2022-05-22' of git://git.kernel.dk/linux-block

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Pull io_uring NVMe command passthrough from Jens Axboe:
 "On top of everything else, this adds support for passthrough for
  io_uring.

  The initial feature for this is NVMe passthrough support, which allows
  non-filesystem based IO commands and admin commands.

  To support this, io_uring grows support for SQE and CQE members that
  are twice as big, allowing to pass in a full NVMe command without
  having to copy data around. And to complete with more than just a
  single 32-bit value as the output"

* tag 'for-5.19/io_uring-passthrough-2022-05-22' of git://git.kernel.dk/linux-block: (22 commits)
  io_uring: cleanup handling of the two task_work lists
  nvme: enable uring-passthrough for admin commands
  nvme: helper for uring-passthrough checks
  blk-mq: fix passthrough plugging
  nvme: add vectored-io support for uring-cmd
  nvme: wire-up uring-cmd support for io-passthru on char-device.
  nvme: refactor nvme_submit_user_cmd()
  block: wire-up support for passthrough plugging
  fs,io_uring: add infrastructure for uring-cmd
  io_uring: support CQE32 for nop operation
  io_uring: enable CQE32
  io_uring: support CQE32 in /proc info
  io_uring: add tracing for additional CQE32 fields
  io_uring: overflow processing for CQE32
  io_uring: flush completions for CQE32
  io_uring: modify io_get_cqe for CQE32
  io_uring: add CQE32 completion processing
  io_uring: add CQE32 setup processing
  io_uring: change ring size calculation for CQE32
  io_uring: store add. return values for CQE32
  ...
This commit is contained in:
Linus Torvalds
2022-05-23 13:06:15 -07:00
parent e1a8fde720 3fe07bcd80
commit 9836e93c0a
11 changed files with 809 additions and 141 deletions
Download Patch File Download Diff File Expand all files Collapse all files

24
include/uapi/linux/io_uring.h
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@@ -22,6 +22,7 @@ struct io_uring_sqe {
union {
__u64 off; /* offset into file */
__u64 addr2;
__u32 cmd_op;
};
union {
__u64 addr; /* pointer to buffer or iovecs */
@@ -61,8 +62,17 @@ struct io_uring_sqe {
__s32 splice_fd_in;
__u32 file_index;
};
__u64 addr3;
__u64 __pad2[1];
union {
struct {
__u64 addr3;
__u64 __pad2[1];
};
/*
* If the ring is initialized with IORING_SETUP_SQE128, then
* this field is used for 80 bytes of arbitrary command data
*/
__u8 cmd[0];
};
};
/*
@@ -128,6 +138,9 @@ enum {
*/
#define IORING_SETUP_TASKRUN_FLAG (1U << 9)
#define IORING_SETUP_SQE128 (1U << 10) /* SQEs are 128 byte */
#define IORING_SETUP_CQE32 (1U << 11) /* CQEs are 32 byte */
enum io_uring_op {
IORING_OP_NOP,
IORING_OP_READV,
@@ -175,6 +188,7 @@ enum io_uring_op {
IORING_OP_FGETXATTR,
IORING_OP_GETXATTR,
IORING_OP_SOCKET,
IORING_OP_URING_CMD,
/* this goes last, obviously */
IORING_OP_LAST,
@@ -251,6 +265,12 @@ struct io_uring_cqe {
__u64 user_data; /* sqe->data submission passed back */
__s32 res; /* result code for this event */
__u32 flags;
/*
* If the ring is initialized with IORING_SETUP_CQE32, then this field
* contains 16-bytes of padding, doubling the size of the CQE.
*/
__u64 big_cqe[];
};
/*