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io_uring: add helper for *REGISTER_SEND_MSG_RING 

Move handling of IORING_REGISTER_SEND_MSG_RING into a separate function
in preparation to growing io_uring_register_blind().

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
pull/1354/merge
Pavel Begunkov 2025-09-08 00:02:58 +01:00 committed by Jens Axboe
parent c2685729fa
commit da8bc3c81c
1 changed files with 19 additions and 14 deletions
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33
io_uring/register.c
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@ -874,6 +874,23 @@ struct file *io_uring_register_get_file(unsigned int fd, bool registered)
return ERR_PTR(-EOPNOTSUPP);
}
static int io_uring_register_send_msg_ring(void __user *arg, unsigned int nr_args)
{
struct io_uring_sqe sqe;
if (!arg || nr_args != 1)
return -EINVAL;
if (copy_from_user(&sqe, arg, sizeof(sqe)))
return -EFAULT;
/* no flags supported */
if (sqe.flags)
return -EINVAL;
if (sqe.opcode != IORING_OP_MSG_RING)
return -EINVAL;
return io_uring_sync_msg_ring(&sqe);
}
/*
* "blind" registration opcodes are ones where there's no ring given, and
* hence the source fd must be -1.
@ -882,21 +899,9 @@ static int io_uring_register_blind(unsigned int opcode, void __user *arg,
unsigned int nr_args)
{
switch (opcode) {
case IORING_REGISTER_SEND_MSG_RING: {
struct io_uring_sqe sqe;
if (!arg || nr_args != 1)
return -EINVAL;
if (copy_from_user(&sqe, arg, sizeof(sqe)))
return -EFAULT;
/* no flags supported */
if (sqe.flags)
return -EINVAL;
if (sqe.opcode == IORING_OP_MSG_RING)
return io_uring_sync_msg_ring(&sqe);
}
case IORING_REGISTER_SEND_MSG_RING:
return io_uring_register_send_msg_ring(arg, nr_args);
}
return -EINVAL;
}