mirrors/linux
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git synced 2025-12-27 10:01:39 -05:00
Code Issues Packages Projects Releases Wiki Activity

io_uring/zcrx: introduce IORING_REGISTER_ZCRX_CTRL

Browse Source 
It'll be annoying and take enough of boilerplate code to implement
new zcrx features as separate io_uring register opcode. Introduce
IORING_REGISTER_ZCRX_CTRL that will multiplex such calls to zcrx.
Note, there are no real users of the opcode in this patch.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Pavel Begunkov
2025-11-13 10:46:12 +00:00
committed by Jens Axboe
parent 1b8b5d0316
commit d663976dad
4 changed files with 43 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
io_uring/register.c
View File

@@ -815,6 +815,9 @@ static int __io_uring_register(struct io_ring_ctx *ctx, unsigned opcode,
case IORING_REGISTER_QUERY:
ret = io_query(ctx, arg, nr_args);
break;
case IORING_REGISTER_ZCRX_CTRL:
ret = io_zcrx_ctrl(ctx, arg, nr_args);
break;
default:
ret = -EINVAL;
break;

21
io_uring/zcrx.c
View File

@@ -941,6 +941,27 @@ static const struct memory_provider_ops io_uring_pp_zc_ops = {
.uninstall = io_pp_uninstall,
};
int io_zcrx_ctrl(struct io_ring_ctx *ctx, void __user *arg, unsigned nr_args)
{
struct zcrx_ctrl ctrl;
struct io_zcrx_ifq *zcrx;
if (nr_args)
return -EINVAL;
if (copy_from_user(&ctrl, arg, sizeof(ctrl)))
return -EFAULT;
if (!mem_is_zero(&ctrl.__resv, sizeof(ctrl.__resv)))
return -EFAULT;
zcrx = xa_load(&ctx->zcrx_ctxs, ctrl.zcrx_id);
if (!zcrx)
return -ENXIO;
if (ctrl.op >= __ZCRX_CTRL_LAST)
return -EOPNOTSUPP;
return -EINVAL;
}
static bool io_zcrx_queue_cqe(struct io_kiocb *req, struct net_iov *niov,
struct io_zcrx_ifq *ifq, int off, int len)
{

6
io_uring/zcrx.h
View File

@@ -65,6 +65,7 @@ struct io_zcrx_ifq {
};
#if defined(CONFIG_IO_URING_ZCRX)
int io_zcrx_ctrl(struct io_ring_ctx *ctx, void __user *arg, unsigned nr_arg);
int io_register_zcrx_ifq(struct io_ring_ctx *ctx,
struct io_uring_zcrx_ifq_reg __user *arg);
void io_unregister_zcrx_ifqs(struct io_ring_ctx *ctx);
@@ -93,6 +94,11 @@ static inline struct io_mapped_region *io_zcrx_get_region(struct io_ring_ctx *ct
{
return NULL;
}
static inline int io_zcrx_ctrl(struct io_ring_ctx *ctx,
void __user *arg, unsigned nr_arg)
{
return -EOPNOTSUPP;
}
#endif
int io_recvzc(struct io_kiocb *req, unsigned int issue_flags);