fsync.c
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上传日期:2013-04-10
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- /*
- * linux/fs/ext2/fsync.c
- *
- * Copyright (C) 1993 Stephen Tweedie (sct@dcs.ed.ac.uk)
- * from
- * Copyright (C) 1992 Remy Card (card@masi.ibp.fr)
- * Laboratoire MASI - Institut Blaise Pascal
- * Universite Pierre et Marie Curie (Paris VI)
- * from
- * linux/fs/minix/truncate.c Copyright (C) 1991, 1992 Linus Torvalds
- *
- * ext2fs fsync primitive
- *
- * Big-endian to little-endian byte-swapping/bitmaps by
- * David S. Miller (davem@caip.rutgers.edu), 1995
- *
- * Removed unnecessary code duplication for little endian machines
- * and excessive __inline__s.
- * Andi Kleen, 1997
- *
- * Major simplications and cleanup - we only need to do the metadata, because
- * we can depend on generic_block_fdatasync() to sync the data blocks.
- */
- #include <linux/fs.h>
- #include <linux/ext2_fs.h>
- #include <linux/locks.h>
- #include <linux/smp_lock.h>
- /*
- * File may be NULL when we are called. Perhaps we shouldn't
- * even pass file to fsync ?
- */
- int ext2_sync_file(struct file * file, struct dentry *dentry, int datasync)
- {
- struct inode *inode = dentry->d_inode;
- return ext2_fsync_inode(inode, datasync);
- }
- int ext2_fsync_inode(struct inode *inode, int datasync)
- {
- 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 |= ext2_sync_inode(inode);
- return err ? -EIO : 0;
- }