1 /* 2 * linux/fs/sysv/file.c 3 * 4 * minix/file.c 5 * Copyright (C) 1991, 1992 Linus Torvalds 6 * 7 * coh/file.c 8 * Copyright (C) 1993 Pascal Haible, Bruno Haible 9 * 10 * sysv/file.c 11 * Copyright (C) 1993 Bruno Haible 12 * 13 * SystemV/Coherent regular file handling primitives 14 */ 15 16 #include "sysv.h" 17 18 /* 19 * We have mostly NULLs here: the current defaults are OK for 20 * the coh filesystem. 21 */ 22 const struct file_operations sysv_file_operations = { 23 .llseek = generic_file_llseek, 24 .read_iter = generic_file_read_iter, 25 .write_iter = generic_file_write_iter, 26 .mmap = generic_file_mmap, 27 .fsync = generic_file_fsync, 28 .splice_read = generic_file_splice_read, 29 }; 30 31 static int sysv_setattr(struct dentry *dentry, struct iattr *attr) 32 { 33 struct inode *inode = d_inode(dentry); 34 int error; 35 36 error = inode_change_ok(inode, attr); 37 if (error) 38 return error; 39 40 if ((attr->ia_valid & ATTR_SIZE) && 41 attr->ia_size != i_size_read(inode)) { 42 error = inode_newsize_ok(inode, attr->ia_size); 43 if (error) 44 return error; 45 truncate_setsize(inode, attr->ia_size); 46 sysv_truncate(inode); 47 } 48 49 setattr_copy(inode, attr); 50 mark_inode_dirty(inode); 51 return 0; 52 } 53 54 const struct inode_operations sysv_file_inode_operations = { 55 .setattr = sysv_setattr, 56 .getattr = sysv_getattr, 57 }; 58