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 /* 14 * We have mostly NULLs here: the current defaults are OK for 15 * the minix filesystem. 16 */ 17 const struct file_operations minix_file_operations = { 18 .llseek = generic_file_llseek, 19 .read_iter = generic_file_read_iter, 20 .write_iter = generic_file_write_iter, 21 .mmap_prepare = generic_file_mmap_prepare, 22 .fsync = simple_fsync, 23 .splice_read = filemap_splice_read, 24 }; 25 26 static int minix_setattr(struct mnt_idmap *idmap, 27 struct dentry *dentry, struct iattr *attr) 28 { 29 struct inode *inode = d_inode(dentry); 30 int error; 31 32 error = setattr_prepare(&nop_mnt_idmap, dentry, attr); 33 if (error) 34 return error; 35 36 if ((attr->ia_valid & ATTR_SIZE) && 37 attr->ia_size != i_size_read(inode)) { 38 error = inode_newsize_ok(inode, attr->ia_size); 39 if (error) 40 return error; 41 42 truncate_setsize(inode, attr->ia_size); 43 minix_truncate(inode); 44 } 45 46 setattr_copy(&nop_mnt_idmap, inode, attr); 47 mark_inode_dirty(inode); 48 return 0; 49 } 50 51 const struct inode_operations minix_file_inode_operations = { 52 .setattr = minix_setattr, 53 .getattr = minix_getattr, 54 }; 55