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 = do_sync_read, 25 .aio_read = generic_file_aio_read, 26 .write = do_sync_write, 27 .aio_write = generic_file_aio_write, 28 .mmap = generic_file_mmap, 29 .fsync = generic_file_fsync, 30 .splice_read = generic_file_splice_read, 31 }; 32 33 static int sysv_setattr(struct dentry *dentry, struct iattr *attr) 34 { 35 struct inode *inode = dentry->d_inode; 36 int error; 37 38 error = inode_change_ok(inode, attr); 39 if (error) 40 return error; 41 42 if ((attr->ia_valid & ATTR_SIZE) && 43 attr->ia_size != i_size_read(inode)) { 44 error = vmtruncate(inode, attr->ia_size); 45 if (error) 46 return error; 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 .truncate = sysv_truncate, 56 .setattr = sysv_setattr, 57 .getattr = sysv_getattr, 58 }; 59