106 lines
3 KiB
C
Executable file
106 lines
3 KiB
C
Executable file
/* SPDX-License-Identifier: GPL-2.0-or-later */
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#ifndef _LINUX_IO_URING_H
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#define _LINUX_IO_URING_H
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#include <linux/sched.h>
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#include <linux/xarray.h>
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#ifdef __GENKSYMS__
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/*
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* ANDROID ABI HACK
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*
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* In the 5.10.162 release, the io_uring code was synced with the version
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* that is in the 5.15.y kernel tree in order to resolve a huge number of
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* potential, and known, problems with the codebase. This makes for a more
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* secure and easier-to-update-and-maintain 5.10.y kernel tree, so this is
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* a great thing, however this caused some issues when it comes to the
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* Android KABI preservation and checking tools.
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*
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* A number of the io_uring structures get used in other core kernel
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* structures, only as "opaque" pointers, so there is not any real ABI
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* breakage. But, due to the visibility of the structures going away, the
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* CRC values of many scheduler variables and functions were changed.
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*
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* In order to preserve the CRC values, to prevent all device kernels to be
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* forced to rebuild for no reason whatsoever from a functional point of
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* view, we need to keep around the "old" io_uring structures for the CRC
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* calculation only. This is done by the following definitions of struct
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* io_identity and struct io_uring_task which will only be visible when the
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* CRC calculation build happens, not in any functional kernel build.
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*
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* Yes, this all is a horrible hack, and these really are not the true
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* structures that any code uses, but so life is in the world of stable
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* apis...
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* The real structures are in io_uring/io_uring.c, see the ones there if
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* you need to touch or do anything with it.
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*
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* NEVER touch these structure definitions, they are fake and not valid code.
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*/
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struct io_identity {
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struct files_struct *files;
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struct mm_struct *mm;
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#ifdef CONFIG_BLK_CGROUP
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struct cgroup_subsys_state *blkcg_css;
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#endif
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const struct cred *creds;
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struct nsproxy *nsproxy;
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struct fs_struct *fs;
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unsigned long fsize;
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#ifdef CONFIG_AUDIT
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kuid_t loginuid;
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unsigned int sessionid;
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#endif
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refcount_t count;
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};
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struct io_uring_task {
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/* submission side */
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struct xarray xa;
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struct wait_queue_head wait;
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struct file *last;
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struct percpu_counter inflight;
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struct io_identity __identity;
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struct io_identity *identity;
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atomic_t in_idle;
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bool sqpoll;
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};
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#endif /* ANDROID ABI HACK */
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#if defined(CONFIG_IO_URING)
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struct sock *io_uring_get_socket(struct file *file);
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void __io_uring_cancel(bool cancel_all);
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void __io_uring_free(struct task_struct *tsk);
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static inline void io_uring_files_cancel(void)
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{
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if (current->io_uring)
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__io_uring_cancel(false);
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}
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static inline void io_uring_task_cancel(void)
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{
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if (current->io_uring)
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__io_uring_cancel(true);
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}
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static inline void io_uring_free(struct task_struct *tsk)
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{
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if (tsk->io_uring)
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__io_uring_free(tsk);
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}
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#else
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static inline struct sock *io_uring_get_socket(struct file *file)
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{
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return NULL;
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}
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static inline void io_uring_task_cancel(void)
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{
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}
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static inline void io_uring_files_cancel(void)
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{
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}
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static inline void io_uring_free(struct task_struct *tsk)
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{
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}
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#endif
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#endif
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