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

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
  ...

diff --cc fs/io_uring.c
index 1015dd4,c5a476e..9f1c682
--- 1/fs/io_uring.c
--- 2/fs/io_uring.c
+++ b/fs/io_uring.c
@@@ -2462,10 -2541,21 +2597,23 @@@ static inline void __io_req_complete(st
                io_req_complete_post(req, res, cflags);
  }
  
+ static inline void __io_req_complete32(struct io_kiocb *req,
+                                      unsigned int issue_flags, s32 res,
+                                      u32 cflags, u64 extra1, u64 extra2)
+ {
+       if (issue_flags & IO_URING_F_COMPLETE_DEFER) {
+               io_req_complete_state(req, res, cflags);
+               req->extra1 = extra1;
+               req->extra2 = extra2;
+       } else {
+               io_req_complete_post32(req, res, cflags, extra1, extra2);
+       }
+ }
+ 
  static inline void io_req_complete(struct io_kiocb *req, s32 res)
  {
 +      if (res < 0)
 +              req_set_fail(req);
        __io_req_complete(req, 0, res, 0);
  }
  
@@@ -4997,17 -5169,11 +5256,23 @@@ static int io_nop_prep(struct io_kiocb 
   */
  static int io_nop(struct io_kiocb *req, unsigned int issue_flags)
  {
-       __io_req_complete(req, issue_flags, 0, io_put_kbuf(req, issue_flags));
++      unsigned int cflags;
 +      void __user *buf;
 +
 +      if (req->flags & REQ_F_BUFFER_SELECT) {
 +              size_t len = 1;
 +
 +              buf = io_buffer_select(req, &len, issue_flags);
 +              if (!buf)
 +                      return -ENOBUFS;
 +      }
 +
 -              __io_req_complete(req, issue_flags, 0, 0);
++      cflags = io_put_kbuf(req, issue_flags);
+       if (!(req->ctx->flags & IORING_SETUP_CQE32))
 -              __io_req_complete32(req, issue_flags, 0, 0, req->nop.extra1,
 -                                      req->nop.extra2);
++              __io_req_complete(req, issue_flags, 0, cflags);
+       else
++              __io_req_complete32(req, issue_flags, 0, cflags,
++                                  req->nop.extra1, req->nop.extra2);
        return 0;
  }
  
@@@ -6750,11 -6776,10 +7013,11 @@@ static void __io_poll_execute(struct io
                req->io_task_work.func = io_apoll_task_func;
  
        trace_io_uring_task_add(req->ctx, req, req->cqe.user_data, req->opcode, mask);
-       io_req_task_work_add(req, false);
+       io_req_task_work_add(req);
  }
  
 -static inline void io_poll_execute(struct io_kiocb *req, int res, int events)
 +static inline void io_poll_execute(struct io_kiocb *req, int res,
 +              __poll_t events)
  {
        if (io_poll_get_ownership(req))
                __io_poll_execute(req, res, events);

diff --cc include/trace/events/io_uring.h
Simple merge

diff --cc include/uapi/linux/io_uring.h
index cc95446,23618be..53e7dae
--- 1/include/uapi/linux/io_uring.h
--- 2/include/uapi/linux/io_uring.h
+++ b/include/uapi/linux/io_uring.h
@@@ -61,19 -62,19 +62,28 @@@ 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];
+       };
  };
  
 +/*
 + * If sqe->file_index is set to this for opcodes that instantiate a new
 + * direct descriptor (like openat/openat2/accept), then io_uring will allocate
 + * an available direct descriptor instead of having the application pass one
 + * in. The picked direct descriptor will be returned in cqe->res, or -ENFILE
 + * if the space is full.
 + */
 +#define IORING_FILE_INDEX_ALLOC               (~0U)
 +
  enum {
        IOSQE_FIXED_FILE_BIT,
        IOSQE_IO_DRAIN_BIT,