// SPDX-License-Identifier: GPL-2.0
/*
 *  linux/fs/minix/file.c
 *
 *  Copyright (C) 1991, 1992 Linus Torvalds
 *
 *  minix regular file handling primitives
 */

#include <linux/buffer_head.h>
#include "minix.h"

int minix_fsync(struct file *file, loff_t start, loff_t end, int datasync)
{
        return mmb_fsync(file,
                        &minix_i(file->f_mapping->host)->i_metadata_bhs,
                        start, end, datasync);
}

/*
 * We have mostly NULLs here: the current defaults are OK for
 * the minix filesystem.
 */
const struct file_operations minix_file_operations = {
        .llseek         = generic_file_llseek,
        .read_iter      = generic_file_read_iter,
        .write_iter     = generic_file_write_iter,
        .mmap_prepare   = generic_file_mmap_prepare,
        .fsync          = minix_fsync,
        .splice_read    = filemap_splice_read,
};

static int minix_setattr(struct mnt_idmap *idmap,
                         struct dentry *dentry, struct iattr *attr)
{
        struct inode *inode = d_inode(dentry);
        int error;

        error = setattr_prepare(&nop_mnt_idmap, dentry, attr);
        if (error)
                return error;

        if ((attr->ia_valid & ATTR_SIZE) &&
            attr->ia_size != i_size_read(inode)) {
                error = inode_newsize_ok(inode, attr->ia_size);
                if (error)
                        return error;

                truncate_setsize(inode, attr->ia_size);
                minix_truncate(inode);
        }

        setattr_copy(&nop_mnt_idmap, inode, attr);
        mark_inode_dirty(inode);
        return 0;
}

const struct inode_operations minix_file_inode_operations = {
        .setattr        = minix_setattr,
        .getattr        = minix_getattr,
};