io_req_set_file

Name:io_req_set_file

Proto:static int io_req_set_file(struct io_submit_state *state, struct io_kiocb *req, const struct io_uring_sqe *sqe)

Type:int

Parameter:

Type	Parameter	Name
struct io_submit_state *	state
struct io_kiocb *	req
const struct io_uring_sqe *	sqe

3398

ctx = ctx

3402

flags = READ_ONCE(IOSQE_ flags )

3403

fd = READ_ONCE(le descriptor to do IO on )

3405

If flags & ssue after inflight IO Then flags |= drain existing IO first

3408

ret = io_req_needs_file(req)

3409

If ret <= 0 Then Return ret

3412

If flags & use fixed fileset Then

3413

If Value for the false possibility is greater at compile time(!* If used, fixed file set. Writers must ensure that ->refs is dead, * readers must ensure that ->refs is alive as long as the file* is * used. Only updated through io_uring_register(2). || (unsigned)fd >= nr_user_files) Then Return -EBADF

3416

fd = array_index_nospec - sanitize an array index after a bounds check* For a code sequence like:* if (index < size) {* index = array_index_nospec(index, size);* val = array[index];* }* (fd, nr_user_files)

3417

file = io_file_from_index(ctx, fd)

3418

If Not file Then Return -EBADF

3420

flags |= ctx owns file

3421

Else

3422

If needs_fixed_file Then Return -EBADF

3424

_uring_file_get - called before getting references to an SQE file*@ctx: pointer to a ring context structure*@fd: SQE file descriptor* Allows to trace out how often an SQE file reference is obtained, which can* help figuring out if it makes sense to use

3425

file = Get as many references to a file as we have IOs left in this submission,* assuming most submissions are for one file, or at least that each file* has more than one submission.

3426

If Value for the false possibility is greater at compile time(!file) Then Return -EBADF

3430

Return 0

**Caller**
Name	Describe
io_submit_sqe

Source code conversion tool public plug-in interface	X
Support c/c++/esqlc/java Oracle/Informix/Mysql Plug-in can realize: logical Report Code generation and batch code conversion