Greg Kroah-Hartman
598cf27219
Link: https://lore.kernel.org/r/20260217200002.683975158@linuxfoundation.org Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Tested-by: Takeshi Ogasawara <takeshi.ogasawara@futuring-girl.com> Tested-by: Peter Schneider <pschneider1968@googlemail.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Salvatore Bonaccorso <carnil@debian.org> Tested-by: Brett A C Sheffield <bacs@librecast.net> Tested-by: Mark Brown <broonie@kernel.org> Tested-by: Luna Jernberg <droidbittin@gmail.com> Tested-by: Ronald Warsow <rwarsow@gmx.de> Tested-by: Justin M. Forbes <jforbes@fedoraproject.org> Tested-by: Ron Economos <re@w6rz.net> Tested-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
45 lines
1.5 KiB
C
45 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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void (*accessed)(struct file *file);
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void (*end_write)(struct kiocb *iocb, 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, struct kiocb *iocb,
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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, struct kiocb *iocb,
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size_t len, 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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