mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-19 00:54:41 +08:00
9c9d1896fa
-----BEGIN PGP SIGNATURE----- iQJIBAABCAAyFiEES0KozwfymdVUl37v6iDy2pc3iXMFAmMNEC8UHHBhdWxAcGF1 bC1tb29yZS5jb20ACgkQ6iDy2pc3iXN6uA//Wvoj5l33ngi5p6CNAfxrZiOeeki7 ylMO9NF4BZY+BOKtWDcrUvpZoLCEEEtLihQ8vz7Iyedtpd34KBzI+H+36JDC9jei dWZiXYzzmaN6JVQ2pIGWr9kTfRPbbE4X91bI2jhDOBv64zCqZu2qDoXshud5WHU1 XhMMtAsQHKrdZa29y6nj6xHYuVA/fkpL5rg5LDrFDYwS7fV+g02ATmRnEsGefRNu JbjrapAnl6lWO6peRuyLNzf6NNgLLsXAmYOdyJGERKx23TSwqVMGhK6eODYBttiH E9OfFDz3oqbLfVrL6uBlr30T1lnns+WyRWdRvAP36L9wbQ/0o24mGsf5E20wo1T9 rwPNsFelI66Eu2S1v/DQWtGtzeaed5IrWMtQc93x4I1PQIxwMSP4znWEKg/2zDNQ tBVVjs6bIzWHbeYozmKK9xvtqL08F5H6t+cS7BDVWPfb8nAfiXvyrwgCRY36xHfO LJWb125lbDflkPRiIgf81IAE6SZLH/PFLowNXZUSAo0CTALhlGZXmhNr6Oz7Xr2A NIwKvuFNqGav0Rcsk+Qy0ir6jRKOj9854U4y3kAVOAhPSyBVZAoN1Y3wtiOpmdI0 taLNKv9W46ZxQtqQNOm31/py3N4bZl0y2JvS4lvwbDMqCjCqVE7236GjQ0vtYQQi 8thpb268VJTby8Y= =/7Pp -----END PGP SIGNATURE----- Merge tag 'lsm-pr-20220829' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/lsm Pull LSM support for IORING_OP_URING_CMD from Paul Moore: "Add SELinux and Smack controls to the io_uring IORING_OP_URING_CMD. These are necessary as without them the IORING_OP_URING_CMD remains outside the purview of the LSMs (Luis' LSM patch, Casey's Smack patch, and my SELinux patch). They have been discussed at length with the io_uring folks, and Jens has given his thumbs-up on the relevant patches (see the commit descriptions). There is one patch that is not strictly necessary, but it makes testing much easier and is very trivial: the /dev/null IORING_OP_URING_CMD patch." * tag 'lsm-pr-20220829' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/lsm: Smack: Provide read control for io_uring_cmd /dev/null: add IORING_OP_URING_CMD support selinux: implement the security_uring_cmd() LSM hook lsm,io_uring: add LSM hooks for the new uring_cmd file op
125 lines
3.0 KiB
C
125 lines
3.0 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
#include <linux/kernel.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/file.h>
|
|
#include <linux/io_uring.h>
|
|
#include <linux/security.h>
|
|
|
|
#include <uapi/linux/io_uring.h>
|
|
|
|
#include "io_uring.h"
|
|
#include "uring_cmd.h"
|
|
|
|
static void io_uring_cmd_work(struct io_kiocb *req, bool *locked)
|
|
{
|
|
struct io_uring_cmd *ioucmd = io_kiocb_to_cmd(req, struct io_uring_cmd);
|
|
|
|
ioucmd->task_work_cb(ioucmd);
|
|
}
|
|
|
|
void io_uring_cmd_complete_in_task(struct io_uring_cmd *ioucmd,
|
|
void (*task_work_cb)(struct io_uring_cmd *))
|
|
{
|
|
struct io_kiocb *req = cmd_to_io_kiocb(ioucmd);
|
|
|
|
ioucmd->task_work_cb = task_work_cb;
|
|
req->io_task_work.func = io_uring_cmd_work;
|
|
io_req_task_work_add(req);
|
|
}
|
|
EXPORT_SYMBOL_GPL(io_uring_cmd_complete_in_task);
|
|
|
|
static inline void io_req_set_cqe32_extra(struct io_kiocb *req,
|
|
u64 extra1, u64 extra2)
|
|
{
|
|
req->extra1 = extra1;
|
|
req->extra2 = extra2;
|
|
req->flags |= REQ_F_CQE32_INIT;
|
|
}
|
|
|
|
/*
|
|
* Called by consumers of io_uring_cmd, if they originally returned
|
|
* -EIOCBQUEUED upon receiving the command.
|
|
*/
|
|
void io_uring_cmd_done(struct io_uring_cmd *ioucmd, ssize_t ret, ssize_t res2)
|
|
{
|
|
struct io_kiocb *req = cmd_to_io_kiocb(ioucmd);
|
|
|
|
if (ret < 0)
|
|
req_set_fail(req);
|
|
|
|
io_req_set_res(req, ret, 0);
|
|
if (req->ctx->flags & IORING_SETUP_CQE32)
|
|
io_req_set_cqe32_extra(req, res2, 0);
|
|
__io_req_complete(req, 0);
|
|
}
|
|
EXPORT_SYMBOL_GPL(io_uring_cmd_done);
|
|
|
|
int io_uring_cmd_prep_async(struct io_kiocb *req)
|
|
{
|
|
struct io_uring_cmd *ioucmd = io_kiocb_to_cmd(req, struct io_uring_cmd);
|
|
size_t cmd_size;
|
|
|
|
BUILD_BUG_ON(uring_cmd_pdu_size(0) != 16);
|
|
BUILD_BUG_ON(uring_cmd_pdu_size(1) != 80);
|
|
|
|
cmd_size = uring_cmd_pdu_size(req->ctx->flags & IORING_SETUP_SQE128);
|
|
|
|
memcpy(req->async_data, ioucmd->cmd, cmd_size);
|
|
return 0;
|
|
}
|
|
|
|
int io_uring_cmd_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
|
|
{
|
|
struct io_uring_cmd *ioucmd = io_kiocb_to_cmd(req, struct io_uring_cmd);
|
|
|
|
if (sqe->rw_flags || sqe->__pad1)
|
|
return -EINVAL;
|
|
ioucmd->cmd = sqe->cmd;
|
|
ioucmd->cmd_op = READ_ONCE(sqe->cmd_op);
|
|
return 0;
|
|
}
|
|
|
|
int io_uring_cmd(struct io_kiocb *req, unsigned int issue_flags)
|
|
{
|
|
struct io_uring_cmd *ioucmd = io_kiocb_to_cmd(req, struct io_uring_cmd);
|
|
struct io_ring_ctx *ctx = req->ctx;
|
|
struct file *file = req->file;
|
|
int ret;
|
|
|
|
if (!req->file->f_op->uring_cmd)
|
|
return -EOPNOTSUPP;
|
|
|
|
ret = security_uring_cmd(ioucmd);
|
|
if (ret)
|
|
return ret;
|
|
|
|
if (ctx->flags & IORING_SETUP_SQE128)
|
|
issue_flags |= IO_URING_F_SQE128;
|
|
if (ctx->flags & IORING_SETUP_CQE32)
|
|
issue_flags |= IO_URING_F_CQE32;
|
|
if (ctx->flags & IORING_SETUP_IOPOLL)
|
|
issue_flags |= IO_URING_F_IOPOLL;
|
|
|
|
if (req_has_async_data(req))
|
|
ioucmd->cmd = req->async_data;
|
|
|
|
ret = file->f_op->uring_cmd(ioucmd, issue_flags);
|
|
if (ret == -EAGAIN) {
|
|
if (!req_has_async_data(req)) {
|
|
if (io_alloc_async_data(req))
|
|
return -ENOMEM;
|
|
io_uring_cmd_prep_async(req);
|
|
}
|
|
return -EAGAIN;
|
|
}
|
|
|
|
if (ret != -EIOCBQUEUED) {
|
|
if (ret < 0)
|
|
req_set_fail(req);
|
|
io_req_set_res(req, ret, 0);
|
|
return ret;
|
|
}
|
|
|
|
return IOU_ISSUE_SKIP_COMPLETE;
|
|
}
|