mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-10-12 11:36:35 +00:00
8452d4a674
Destroy current's io-wq backend and tctx on __io_uring_task_cancel(), aka exec(). Looks it's not strictly necessary, because it will be done at some point when the task dies and changes of creds/files/etc. are handled, but better to do that earlier to free io-wq and not potentially lock previous mm and other resources for the time being. It's safe to do because we wait for all requests of the current task to complete, so no request will use tctx afterwards. Note, that io_uring_files_cancel() may leave some requests for later reaping, so it leaves tctx intact, that's ok as the task is dying anyway. Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
70 lines
1.4 KiB
C
70 lines
1.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
|
|
#ifndef _LINUX_IO_URING_H
|
|
#define _LINUX_IO_URING_H
|
|
|
|
#include <linux/sched.h>
|
|
#include <linux/xarray.h>
|
|
|
|
struct io_wq_work_node {
|
|
struct io_wq_work_node *next;
|
|
};
|
|
|
|
struct io_wq_work_list {
|
|
struct io_wq_work_node *first;
|
|
struct io_wq_work_node *last;
|
|
};
|
|
|
|
struct io_uring_task {
|
|
/* submission side */
|
|
struct xarray xa;
|
|
struct wait_queue_head wait;
|
|
struct file *last;
|
|
void *io_wq;
|
|
struct percpu_counter inflight;
|
|
atomic_t in_idle;
|
|
bool sqpoll;
|
|
|
|
spinlock_t task_lock;
|
|
struct io_wq_work_list task_list;
|
|
unsigned long task_state;
|
|
struct callback_head task_work;
|
|
};
|
|
|
|
#if defined(CONFIG_IO_URING)
|
|
struct sock *io_uring_get_socket(struct file *file);
|
|
void __io_uring_task_cancel(void);
|
|
void __io_uring_files_cancel(struct files_struct *files);
|
|
void __io_uring_free(struct task_struct *tsk);
|
|
|
|
static inline void io_uring_task_cancel(void)
|
|
{
|
|
if (current->io_uring)
|
|
__io_uring_task_cancel();
|
|
}
|
|
static inline void io_uring_files_cancel(struct files_struct *files)
|
|
{
|
|
if (current->io_uring)
|
|
__io_uring_files_cancel(files);
|
|
}
|
|
static inline void io_uring_free(struct task_struct *tsk)
|
|
{
|
|
if (tsk->io_uring)
|
|
__io_uring_free(tsk);
|
|
}
|
|
#else
|
|
static inline struct sock *io_uring_get_socket(struct file *file)
|
|
{
|
|
return NULL;
|
|
}
|
|
static inline void io_uring_task_cancel(void)
|
|
{
|
|
}
|
|
static inline void io_uring_files_cancel(struct files_struct *files)
|
|
{
|
|
}
|
|
static inline void io_uring_free(struct task_struct *tsk)
|
|
{
|
|
}
|
|
#endif
|
|
|
|
#endif
|