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io_uring: disable ENTER_EXT_ARG_REG for IOPOLL

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IOPOLL doesn't use the extended arguments, no need for it to support
IORING_ENTER_EXT_ARG_REG. Let's disable it for IOPOLL, if anything it
leaves more space for future extensions.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/a35ecd919dbdc17bd5b7932273e317832c531b45.1731689588.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Pavel Begunkov 2024-11-15 16:54:39 +00:00 committed by Jens Axboe
parent 68685fa20e
commit 3730aebbda
1 changed files with 2 additions and 6 deletions
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8
io_uring/io_uring.c
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@ -3214,12 +3214,8 @@ static int io_validate_ext_arg(struct io_ring_ctx *ctx, unsigned flags,
if (!(flags & IORING_ENTER_EXT_ARG))
return 0;
if (flags & IORING_ENTER_EXT_ARG_REG) {
if (argsz != sizeof(struct io_uring_reg_wait))
return -EINVAL;
return PTR_ERR(io_get_ext_arg_reg(ctx, argp));
}
if (flags & IORING_ENTER_EXT_ARG_REG)
return -EINVAL;
if (argsz != sizeof(arg))
return -EINVAL;
if (copy_from_user(&arg, argp, sizeof(arg)))