file.c
上传用户:jlfgdled
上传日期:2013-04-10
资源大小:33168k
文件大小:1k
- /*
- * linux/fs/sysv/file.c
- *
- * minix/file.c
- * Copyright (C) 1991, 1992 Linus Torvalds
- *
- * coh/file.c
- * Copyright (C) 1993 Pascal Haible, Bruno Haible
- *
- * sysv/file.c
- * Copyright (C) 1993 Bruno Haible
- *
- * SystemV/Coherent regular file handling primitives
- */
- #include <linux/fs.h>
- #include <linux/sysv_fs.h>
- /*
- * We have mostly NULLs here: the current defaults are OK for
- * the coh filesystem.
- */
- struct file_operations sysv_file_operations = {
- llseek: generic_file_llseek,
- read: generic_file_read,
- write: generic_file_write,
- mmap: generic_file_mmap,
- fsync: sysv_sync_file,
- };
- struct inode_operations sysv_file_inode_operations = {
- truncate: sysv_truncate,
- };
- int sysv_sync_file(struct file * file, struct dentry *dentry, int datasync)
- {
- struct inode *inode = dentry->d_inode;
- int err;
- err = fsync_inode_buffers(inode);
- err |= fsync_inode_data_buffers(inode);
- if (!(inode->i_state & I_DIRTY))
- return err;
- if (datasync && !(inode->i_state & I_DIRTY_DATASYNC))
- return err;
-
- err |= sysv_sync_inode(inode);
- return err ? -EIO : 0;
- }