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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142434445/* 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; void (*accessed)(struct file *file); void (*end_write)(struct kiocb *iocb, ssize_t);};
struct file *backing_file_open(const struct file *user_file, int flags, const struct path *real_path, const struct cred *cred);struct file *backing_tmpfile_open(const struct file *user_file, int flags, const struct path *real_parentpath, umode_t mode, 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, struct kiocb *iocb, 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, struct kiocb *iocb, 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 */