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usr
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src
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linux-aws-headers-6.8.0-1031
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include
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linux
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/* SPDX-License-Identifier: GPL-2.0-only */ /* * Common helpers for stackable filesystems and backing files. * * Copyright (C) 2023 CTERA Networks. */ #ifndef _LINUX_BACKING_FILE_H #define _LINUX_BACKING_FILE_H #include <linux/file.h> #include <linux/uio.h> #include <linux/fs.h> struct backing_file_ctx { const struct cred *cred; struct file *user_file; void (*accessed)(struct file *); void (*end_write)(struct file *); }; struct file *backing_file_open(const struct path *user_path, int flags, const struct path *real_path, const struct cred *cred); ssize_t backing_file_read_iter(struct file *file, struct iov_iter *iter, struct kiocb *iocb, int flags, struct backing_file_ctx *ctx); ssize_t backing_file_write_iter(struct file *file, struct iov_iter *iter, struct kiocb *iocb, int flags, struct backing_file_ctx *ctx); ssize_t backing_file_splice_read(struct file *in, loff_t *ppos, struct pipe_inode_info *pipe, size_t len, unsigned int flags, struct backing_file_ctx *ctx); ssize_t backing_file_splice_write(struct pipe_inode_info *pipe, struct file *out, loff_t *ppos, size_t len, unsigned int flags, struct backing_file_ctx *ctx); int backing_file_mmap(struct file *file, struct vm_area_struct *vma, struct backing_file_ctx *ctx); #endif /* _LINUX_BACKING_FILE_H */