mirror of
https://github.com/torvalds/linux.git
synced 2024-11-21 19:41:42 +00:00
io_uring: move cancelation into its own file
This also helps cleanup the io_uring.h cancel parts, as we can make things static in the cancel.c file, mostly. Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Jens Axboe
parent
329061d3e2
commit
7aaff708a7
@ -6,5 +6,6 @@ obj-$(CONFIG_IO_URING) += io_uring.o xattr.o nop.o fs.o splice.o \
|
||||
sync.o advise.o filetable.o \
|
||||
openclose.o uring_cmd.o epoll.o \
|
||||
statx.o net.o msg_ring.o timeout.o \
|
||||
sqpoll.o fdinfo.o tctx.o poll.o
|
||||
sqpoll.o fdinfo.o tctx.o poll.o \
|
||||
cancel.o
|
||||
obj-$(CONFIG_IO_WQ) += io-wq.o
|
||||
|
||||
194
io_uring/cancel.c
Normal file
194
io_uring/cancel.c
Normal file
@ -0,0 +1,194 @@
|
||||
// SPDX-License-Identifier: GPL-2.0
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/errno.h>
|
||||
#include <linux/fs.h>
|
||||
#include <linux/file.h>
|
||||
#include <linux/mm.h>
|
||||
#include <linux/slab.h>
|
||||
#include <linux/namei.h>
|
||||
#include <linux/io_uring.h>
|
||||
|
||||
#include <uapi/linux/io_uring.h>
|
||||
|
||||
#include "io_uring_types.h"
|
||||
#include "io_uring.h"
|
||||
#include "tctx.h"
|
||||
#include "poll.h"
|
||||
#include "timeout.h"
|
||||
#include "cancel.h"
|
||||
|
||||
struct io_cancel {
|
||||
struct file *file;
|
||||
u64 addr;
|
||||
u32 flags;
|
||||
s32 fd;
|
||||
};
|
||||
|
||||
#define CANCEL_FLAGS (IORING_ASYNC_CANCEL_ALL | IORING_ASYNC_CANCEL_FD | \
|
||||
IORING_ASYNC_CANCEL_ANY)
|
||||
|
||||
static bool io_cancel_cb(struct io_wq_work *work, void *data)
|
||||
{
|
||||
struct io_kiocb *req = container_of(work, struct io_kiocb, work);
|
||||
struct io_cancel_data *cd = data;
|
||||
|
||||
if (req->ctx != cd->ctx)
|
||||
return false;
|
||||
if (cd->flags & IORING_ASYNC_CANCEL_ANY) {
|
||||
;
|
||||
} else if (cd->flags & IORING_ASYNC_CANCEL_FD) {
|
||||
if (req->file != cd->file)
|
||||
return false;
|
||||
} else {
|
||||
if (req->cqe.user_data != cd->data)
|
||||
return false;
|
||||
}
|
||||
if (cd->flags & (IORING_ASYNC_CANCEL_ALL|IORING_ASYNC_CANCEL_ANY)) {
|
||||
if (cd->seq == req->work.cancel_seq)
|
||||
return false;
|
||||
req->work.cancel_seq = cd->seq;
|
||||
}
|
||||
return true;
|
||||
}
|
||||
|
||||
static int io_async_cancel_one(struct io_uring_task *tctx,
|
||||
struct io_cancel_data *cd)
|
||||
{
|
||||
enum io_wq_cancel cancel_ret;
|
||||
int ret = 0;
|
||||
bool all;
|
||||
|
||||
if (!tctx || !tctx->io_wq)
|
||||
return -ENOENT;
|
||||
|
||||
all = cd->flags & (IORING_ASYNC_CANCEL_ALL|IORING_ASYNC_CANCEL_ANY);
|
||||
cancel_ret = io_wq_cancel_cb(tctx->io_wq, io_cancel_cb, cd, all);
|
||||
switch (cancel_ret) {
|
||||
case IO_WQ_CANCEL_OK:
|
||||
ret = 0;
|
||||
break;
|
||||
case IO_WQ_CANCEL_RUNNING:
|
||||
ret = -EALREADY;
|
||||
break;
|
||||
case IO_WQ_CANCEL_NOTFOUND:
|
||||
ret = -ENOENT;
|
||||
break;
|
||||
}
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
int io_try_cancel(struct io_kiocb *req, struct io_cancel_data *cd)
|
||||
{
|
||||
struct io_ring_ctx *ctx = req->ctx;
|
||||
int ret;
|
||||
|
||||
WARN_ON_ONCE(!io_wq_current_is_worker() && req->task != current);
|
||||
|
||||
ret = io_async_cancel_one(req->task->io_uring, cd);
|
||||
/*
|
||||
* Fall-through even for -EALREADY, as we may have poll armed
|
||||
* that need unarming.
|
||||
*/
|
||||
if (!ret)
|
||||
return 0;
|
||||
|
||||
spin_lock(&ctx->completion_lock);
|
||||
ret = io_poll_cancel(ctx, cd);
|
||||
if (ret != -ENOENT)
|
||||
goto out;
|
||||
if (!(cd->flags & IORING_ASYNC_CANCEL_FD))
|
||||
ret = io_timeout_cancel(ctx, cd);
|
||||
out:
|
||||
spin_unlock(&ctx->completion_lock);
|
||||
return ret;
|
||||
}
|
||||
|
||||
|
||||
int io_async_cancel_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
|
||||
{
|
||||
struct io_cancel *cancel = io_kiocb_to_cmd(req);
|
||||
|
||||
if (unlikely(req->flags & REQ_F_BUFFER_SELECT))
|
||||
return -EINVAL;
|
||||
if (sqe->off || sqe->len || sqe->splice_fd_in)
|
||||
return -EINVAL;
|
||||
|
||||
cancel->addr = READ_ONCE(sqe->addr);
|
||||
cancel->flags = READ_ONCE(sqe->cancel_flags);
|
||||
if (cancel->flags & ~CANCEL_FLAGS)
|
||||
return -EINVAL;
|
||||
if (cancel->flags & IORING_ASYNC_CANCEL_FD) {
|
||||
if (cancel->flags & IORING_ASYNC_CANCEL_ANY)
|
||||
return -EINVAL;
|
||||
cancel->fd = READ_ONCE(sqe->fd);
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int __io_async_cancel(struct io_cancel_data *cd, struct io_kiocb *req,
|
||||
unsigned int issue_flags)
|
||||
{
|
||||
bool all = cd->flags & (IORING_ASYNC_CANCEL_ALL|IORING_ASYNC_CANCEL_ANY);
|
||||
struct io_ring_ctx *ctx = cd->ctx;
|
||||
struct io_tctx_node *node;
|
||||
int ret, nr = 0;
|
||||
|
||||
do {
|
||||
ret = io_try_cancel(req, cd);
|
||||
if (ret == -ENOENT)
|
||||
break;
|
||||
if (!all)
|
||||
return ret;
|
||||
nr++;
|
||||
} while (1);
|
||||
|
||||
/* slow path, try all io-wq's */
|
||||
io_ring_submit_lock(ctx, issue_flags);
|
||||
ret = -ENOENT;
|
||||
list_for_each_entry(node, &ctx->tctx_list, ctx_node) {
|
||||
struct io_uring_task *tctx = node->task->io_uring;
|
||||
|
||||
ret = io_async_cancel_one(tctx, cd);
|
||||
if (ret != -ENOENT) {
|
||||
if (!all)
|
||||
break;
|
||||
nr++;
|
||||
}
|
||||
}
|
||||
io_ring_submit_unlock(ctx, issue_flags);
|
||||
return all ? nr : ret;
|
||||
}
|
||||
|
||||
int io_async_cancel(struct io_kiocb *req, unsigned int issue_flags)
|
||||
{
|
||||
struct io_cancel *cancel = io_kiocb_to_cmd(req);
|
||||
struct io_cancel_data cd = {
|
||||
.ctx = req->ctx,
|
||||
.data = cancel->addr,
|
||||
.flags = cancel->flags,
|
||||
.seq = atomic_inc_return(&req->ctx->cancel_seq),
|
||||
};
|
||||
int ret;
|
||||
|
||||
if (cd.flags & IORING_ASYNC_CANCEL_FD) {
|
||||
if (req->flags & REQ_F_FIXED_FILE)
|
||||
req->file = io_file_get_fixed(req, cancel->fd,
|
||||
issue_flags);
|
||||
else
|
||||
req->file = io_file_get_normal(req, cancel->fd);
|
||||
if (!req->file) {
|
||||
ret = -EBADF;
|
||||
goto done;
|
||||
}
|
||||
cd.file = req->file;
|
||||
}
|
||||
|
||||
ret = __io_async_cancel(&cd, req, issue_flags);
|
||||
done:
|
||||
if (ret < 0)
|
||||
req_set_fail(req);
|
||||
io_req_set_res(req, ret, 0);
|
||||
return IOU_OK;
|
||||
}
|
||||
6
io_uring/cancel.h
Normal file
6
io_uring/cancel.h
Normal file
@ -0,0 +1,6 @@
|
||||
// SPDX-License-Identifier: GPL-2.0
|
||||
|
||||
int io_async_cancel_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe);
|
||||
int io_async_cancel(struct io_kiocb *req, unsigned int issue_flags);
|
||||
|
||||
int io_try_cancel(struct io_kiocb *req, struct io_cancel_data *cd);
|
||||
@ -108,6 +108,7 @@
|
||||
#include "msg_ring.h"
|
||||
#include "timeout.h"
|
||||
#include "poll.h"
|
||||
#include "cancel.h"
|
||||
|
||||
#define IORING_MAX_ENTRIES 32768
|
||||
#define IORING_MAX_CQ_ENTRIES (2 * IORING_MAX_ENTRIES)
|
||||
@ -210,13 +211,6 @@ struct io_buffer {
|
||||
* First field must be the file pointer in all the
|
||||
* iocb unions! See also 'struct kiocb' in <linux/fs.h>
|
||||
*/
|
||||
struct io_cancel {
|
||||
struct file *file;
|
||||
u64 addr;
|
||||
u32 flags;
|
||||
s32 fd;
|
||||
};
|
||||
|
||||
struct io_rw {
|
||||
/* NOTE: kiocb has the file as the first member, so don't do it here */
|
||||
struct kiocb kiocb;
|
||||
@ -3362,175 +3356,6 @@ static __maybe_unused int io_eopnotsupp_prep(struct io_kiocb *kiocb,
|
||||
return -EOPNOTSUPP;
|
||||
}
|
||||
|
||||
static bool io_cancel_cb(struct io_wq_work *work, void *data)
|
||||
{
|
||||
struct io_kiocb *req = container_of(work, struct io_kiocb, work);
|
||||
struct io_cancel_data *cd = data;
|
||||
|
||||
if (req->ctx != cd->ctx)
|
||||
return false;
|
||||
if (cd->flags & IORING_ASYNC_CANCEL_ANY) {
|
||||
;
|
||||
} else if (cd->flags & IORING_ASYNC_CANCEL_FD) {
|
||||
if (req->file != cd->file)
|
||||
return false;
|
||||
} else {
|
||||
if (req->cqe.user_data != cd->data)
|
||||
return false;
|
||||
}
|
||||
if (cd->flags & (IORING_ASYNC_CANCEL_ALL|IORING_ASYNC_CANCEL_ANY)) {
|
||||
if (cd->seq == req->work.cancel_seq)
|
||||
return false;
|
||||
req->work.cancel_seq = cd->seq;
|
||||
}
|
||||
return true;
|
||||
}
|
||||
|
||||
static int io_async_cancel_one(struct io_uring_task *tctx,
|
||||
struct io_cancel_data *cd)
|
||||
{
|
||||
enum io_wq_cancel cancel_ret;
|
||||
int ret = 0;
|
||||
bool all;
|
||||
|
||||
if (!tctx || !tctx->io_wq)
|
||||
return -ENOENT;
|
||||
|
||||
all = cd->flags & (IORING_ASYNC_CANCEL_ALL|IORING_ASYNC_CANCEL_ANY);
|
||||
cancel_ret = io_wq_cancel_cb(tctx->io_wq, io_cancel_cb, cd, all);
|
||||
switch (cancel_ret) {
|
||||
case IO_WQ_CANCEL_OK:
|
||||
ret = 0;
|
||||
break;
|
||||
case IO_WQ_CANCEL_RUNNING:
|
||||
ret = -EALREADY;
|
||||
break;
|
||||
case IO_WQ_CANCEL_NOTFOUND:
|
||||
ret = -ENOENT;
|
||||
break;
|
||||
}
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
int io_try_cancel(struct io_kiocb *req, struct io_cancel_data *cd)
|
||||
{
|
||||
struct io_ring_ctx *ctx = req->ctx;
|
||||
int ret;
|
||||
|
||||
WARN_ON_ONCE(!io_wq_current_is_worker() && req->task != current);
|
||||
|
||||
ret = io_async_cancel_one(req->task->io_uring, cd);
|
||||
/*
|
||||
* Fall-through even for -EALREADY, as we may have poll armed
|
||||
* that need unarming.
|
||||
*/
|
||||
if (!ret)
|
||||
return 0;
|
||||
|
||||
spin_lock(&ctx->completion_lock);
|
||||
ret = io_poll_cancel(ctx, cd);
|
||||
if (ret != -ENOENT)
|
||||
goto out;
|
||||
if (!(cd->flags & IORING_ASYNC_CANCEL_FD))
|
||||
ret = io_timeout_cancel(ctx, cd);
|
||||
out:
|
||||
spin_unlock(&ctx->completion_lock);
|
||||
return ret;
|
||||
}
|
||||
|
||||
#define CANCEL_FLAGS (IORING_ASYNC_CANCEL_ALL | IORING_ASYNC_CANCEL_FD | \
|
||||
IORING_ASYNC_CANCEL_ANY)
|
||||
|
||||
static int io_async_cancel_prep(struct io_kiocb *req,
|
||||
const struct io_uring_sqe *sqe)
|
||||
{
|
||||
struct io_cancel *cancel = io_kiocb_to_cmd(req);
|
||||
|
||||
if (unlikely(req->flags & REQ_F_BUFFER_SELECT))
|
||||
return -EINVAL;
|
||||
if (sqe->off || sqe->len || sqe->splice_fd_in)
|
||||
return -EINVAL;
|
||||
|
||||
cancel->addr = READ_ONCE(sqe->addr);
|
||||
cancel->flags = READ_ONCE(sqe->cancel_flags);
|
||||
if (cancel->flags & ~CANCEL_FLAGS)
|
||||
return -EINVAL;
|
||||
if (cancel->flags & IORING_ASYNC_CANCEL_FD) {
|
||||
if (cancel->flags & IORING_ASYNC_CANCEL_ANY)
|
||||
return -EINVAL;
|
||||
cancel->fd = READ_ONCE(sqe->fd);
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int __io_async_cancel(struct io_cancel_data *cd, struct io_kiocb *req,
|
||||
unsigned int issue_flags)
|
||||
{
|
||||
bool all = cd->flags & (IORING_ASYNC_CANCEL_ALL|IORING_ASYNC_CANCEL_ANY);
|
||||
struct io_ring_ctx *ctx = cd->ctx;
|
||||
struct io_tctx_node *node;
|
||||
int ret, nr = 0;
|
||||
|
||||
do {
|
||||
ret = io_try_cancel(req, cd);
|
||||
if (ret == -ENOENT)
|
||||
break;
|
||||
if (!all)
|
||||
return ret;
|
||||
nr++;
|
||||
} while (1);
|
||||
|
||||
/* slow path, try all io-wq's */
|
||||
io_ring_submit_lock(ctx, issue_flags);
|
||||
ret = -ENOENT;
|
||||
list_for_each_entry(node, &ctx->tctx_list, ctx_node) {
|
||||
struct io_uring_task *tctx = node->task->io_uring;
|
||||
|
||||
ret = io_async_cancel_one(tctx, cd);
|
||||
if (ret != -ENOENT) {
|
||||
if (!all)
|
||||
break;
|
||||
nr++;
|
||||
}
|
||||
}
|
||||
io_ring_submit_unlock(ctx, issue_flags);
|
||||
return all ? nr : ret;
|
||||
}
|
||||
|
||||
static int io_async_cancel(struct io_kiocb *req, unsigned int issue_flags)
|
||||
{
|
||||
struct io_cancel *cancel = io_kiocb_to_cmd(req);
|
||||
struct io_cancel_data cd = {
|
||||
.ctx = req->ctx,
|
||||
.data = cancel->addr,
|
||||
.flags = cancel->flags,
|
||||
.seq = atomic_inc_return(&req->ctx->cancel_seq),
|
||||
};
|
||||
int ret;
|
||||
|
||||
if (cd.flags & IORING_ASYNC_CANCEL_FD) {
|
||||
if (req->flags & REQ_F_FIXED_FILE)
|
||||
req->file = io_file_get_fixed(req, cancel->fd,
|
||||
issue_flags);
|
||||
else
|
||||
req->file = io_file_get_normal(req, cancel->fd);
|
||||
if (!req->file) {
|
||||
ret = -EBADF;
|
||||
goto done;
|
||||
}
|
||||
cd.file = req->file;
|
||||
}
|
||||
|
||||
ret = __io_async_cancel(&cd, req, issue_flags);
|
||||
done:
|
||||
if (ret < 0)
|
||||
req_set_fail(req);
|
||||
io_req_set_res(req, ret, 0);
|
||||
return IOU_OK;
|
||||
}
|
||||
|
||||
static int io_files_update_prep(struct io_kiocb *req,
|
||||
const struct io_uring_sqe *sqe)
|
||||
{
|
||||
|
||||
@ -157,7 +157,6 @@ void io_req_task_complete(struct io_kiocb *req, bool *locked);
|
||||
void io_req_task_queue_fail(struct io_kiocb *req, int ret);
|
||||
void io_req_task_submit(struct io_kiocb *req, bool *locked);
|
||||
void tctx_task_work(struct callback_head *cb);
|
||||
int io_try_cancel(struct io_kiocb *req, struct io_cancel_data *cd);
|
||||
__cold void io_uring_cancel_generic(bool cancel_all, struct io_sq_data *sqd);
|
||||
int io_uring_alloc_task_context(struct task_struct *task,
|
||||
struct io_ring_ctx *ctx);
|
||||
|
||||
@ -11,6 +11,7 @@
|
||||
#include "io_uring_types.h"
|
||||
#include "io_uring.h"
|
||||
#include "refs.h"
|
||||
#include "cancel.h"
|
||||
#include "timeout.h"
|
||||
|
||||
struct io_timeout {
|
||||
|
||||
Loading…
Reference in New Issue
Block a user