1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * linux/fs/minix/file.c 4 * 5 * Copyright (C) 1991, 1992 Linus Torvalds 6 * 7 * minix regular file handling primitives 8 */ 9 10 #include <linux/buffer_head.h> 11 #include "minix.h" 12 13 int minix_fsync(struct file *file, loff_t start, loff_t end, int datasync) 14 { 15 return mmb_fsync(file, 16 &minix_i(file->f_mapping->host)->i_metadata_bhs, 17 start, end, datasync); 18 } 19 20 /* 21 * We have mostly NULLs here: the current defaults are OK for 22 * the minix filesystem. 23 */ 24 const struct file_operations minix_file_operations = { 25 .llseek = generic_file_llseek, 26 .read_iter = generic_file_read_iter, 27 .write_iter = generic_file_write_iter, 28 .mmap_prepare = generic_file_mmap_prepare, 29 .fsync = minix_fsync, 30 .splice_read = filemap_splice_read, 31 }; 32 33 static int minix_setattr(struct mnt_idmap *idmap, 34 struct dentry *dentry, struct iattr *attr) 35 { 36 struct inode *inode = d_inode(dentry); 37 int error; 38 39 error = setattr_prepare(&nop_mnt_idmap, dentry, attr); 40 if (error) 41 return error; 42 43 if ((attr->ia_valid & ATTR_SIZE) && 44 attr->ia_size != i_size_read(inode)) { 45 error = inode_newsize_ok(inode, attr->ia_size); 46 if (error) 47 return error; 48 49 truncate_setsize(inode, attr->ia_size); 50 minix_truncate(inode); 51 } 52 53 setattr_copy(&nop_mnt_idmap, inode, attr); 54 mark_inode_dirty(inode); 55 return 0; 56 } 57 58 const struct inode_operations minix_file_inode_operations = { 59 .setattr = minix_setattr, 60 .getattr = minix_getattr, 61 }; 62