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io_uring: import 5.15-stable io_uring

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This imports the io_uring codebase from 5.15.85, wholesale. Changes
from that code base:

- Drop IOCB_ALLOC_CACHE, we don't have that in 5.10.
- Drop MKDIRAT/SYMLINKAT/LINKAT. Would require further VFS backports,
  and we don't support these in 5.10 to begin with.
- sock_from_file() old style calling convention.
- Use compat_get_bitmap() only for CONFIG_COMPAT=y

Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jens Axboe
2022-12-22 14:30:11 -07:00
committed by Greg Kroah-Hartman
parent ed30050329
commit 788d082426
15 changed files with 6855 additions and 5622 deletions
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48
include/linux/io_uring.h
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@@ -5,50 +5,20 @@
#include <linux/sched.h>
#include <linux/xarray.h>
struct io_identity {
struct files_struct *files;
struct mm_struct *mm;
#ifdef CONFIG_BLK_CGROUP
struct cgroup_subsys_state *blkcg_css;
#endif
const struct cred *creds;
struct nsproxy *nsproxy;
struct fs_struct *fs;
unsigned long fsize;
#ifdef CONFIG_AUDIT
kuid_t loginuid;
unsigned int sessionid;
#endif
refcount_t count;
};
struct io_uring_task {
/* submission side */
struct xarray xa;
struct wait_queue_head wait;
struct file *last;
struct percpu_counter inflight;
struct io_identity __identity;
struct io_identity *identity;
atomic_t in_idle;
bool sqpoll;
};
#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_cancel(bool cancel_all);
void __io_uring_free(struct task_struct *tsk);
static inline void io_uring_files_cancel(void)
{
if (current->io_uring)
__io_uring_cancel(false);
}
static inline void io_uring_task_cancel(void)
{
if (current->io_uring && !xa_empty(&current->io_uring->xa))
__io_uring_task_cancel();
}
static inline void io_uring_files_cancel(struct files_struct *files)
{
if (current->io_uring && !xa_empty(&current->io_uring->xa))
__io_uring_files_cancel(files);
if (current->io_uring)
__io_uring_cancel(true);
}
static inline void io_uring_free(struct task_struct *tsk)
{
@@ -63,7 +33,7 @@ static inline struct sock *io_uring_get_socket(struct file *file)
static inline void io_uring_task_cancel(void)
{
}
static inline void io_uring_files_cancel(struct files_struct *files)
static inline void io_uring_files_cancel(void)
{
}
static inline void io_uring_free(struct task_struct *tsk)