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f03b296e8b
This is needed for extending fuse inode size after fuse passthrough write. Suggested-by: Miklos Szeredi <miklos@szeredi.hu> Link: https://lore.kernel.org/linux-fsdevel/CAJfpegs=cvZ_NYy6Q_D42XhYS=Sjj5poM1b5TzXzOVvX=R36aA@mail.gmail.com/ Signed-off-by: Amir Goldstein <amir73il@gmail.com> Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
46 lines
1.5 KiB
C
46 lines
1.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Common helpers for stackable filesystems and backing files.
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*
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* Copyright (C) 2023 CTERA Networks.
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*/
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#ifndef _LINUX_BACKING_FILE_H
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#define _LINUX_BACKING_FILE_H
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#include <linux/file.h>
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#include <linux/uio.h>
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#include <linux/fs.h>
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struct backing_file_ctx {
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const struct cred *cred;
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struct file *user_file;
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void (*accessed)(struct file *);
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void (*end_write)(struct file *, loff_t, ssize_t);
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};
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struct file *backing_file_open(const struct path *user_path, int flags,
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const struct path *real_path,
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const struct cred *cred);
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struct file *backing_tmpfile_open(const struct path *user_path, int flags,
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const struct path *real_parentpath,
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umode_t mode, const struct cred *cred);
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ssize_t backing_file_read_iter(struct file *file, struct iov_iter *iter,
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struct kiocb *iocb, int flags,
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struct backing_file_ctx *ctx);
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ssize_t backing_file_write_iter(struct file *file, struct iov_iter *iter,
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struct kiocb *iocb, int flags,
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struct backing_file_ctx *ctx);
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ssize_t backing_file_splice_read(struct file *in, loff_t *ppos,
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struct pipe_inode_info *pipe, size_t len,
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unsigned int flags,
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struct backing_file_ctx *ctx);
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ssize_t backing_file_splice_write(struct pipe_inode_info *pipe,
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struct file *out, loff_t *ppos, size_t len,
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unsigned int flags,
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struct backing_file_ctx *ctx);
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int backing_file_mmap(struct file *file, struct vm_area_struct *vma,
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struct backing_file_ctx *ctx);
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#endif /* _LINUX_BACKING_FILE_H */
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