| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * linux/fs/ext2/fsync.c |
| 3 | * |
| 4 | * Copyright (C) 1993 Stephen Tweedie (sct@dcs.ed.ac.uk) |
| 5 | * from |
| 6 | * Copyright (C) 1992 Remy Card (card@masi.ibp.fr) |
| 7 | * Laboratoire MASI - Institut Blaise Pascal |
| 8 | * Universite Pierre et Marie Curie (Paris VI) |
| 9 | * from |
| 10 | * linux/fs/minix/truncate.c Copyright (C) 1991, 1992 Linus Torvalds |
| 11 | * |
| 12 | * ext2fs fsync primitive |
| 13 | * |
| 14 | * Big-endian to little-endian byte-swapping/bitmaps by |
| 15 | * David S. Miller (davem@caip.rutgers.edu), 1995 |
| 16 | * |
| 17 | * Removed unnecessary code duplication for little endian machines |
| 18 | * and excessive __inline__s. |
| 19 | * Andi Kleen, 1997 |
| 20 | * |
| 21 | * Major simplications and cleanup - we only need to do the metadata, because |
| 22 | * we can depend on generic_block_fdatasync() to sync the data blocks. |
| 23 | */ |
| 24 | |
| 25 | #include "ext2.h" |
| 26 | #include <linux/smp_lock.h> |
| 27 | #include <linux/buffer_head.h> /* for fsync_inode_buffers() */ |
| 28 | |
| 29 | |
| 30 | /* |
| 31 | * File may be NULL when we are called. Perhaps we shouldn't |
| 32 | * even pass file to fsync ? |
| 33 | */ |
| 34 | |
| 35 | int ext2_sync_file(struct file *file, struct dentry *dentry, int datasync) |
| 36 | { |
| 37 | struct inode *inode = dentry->d_inode; |
| 38 | int err; |
| 39 | int ret; |
| 40 | |
| 41 | ret = sync_mapping_buffers(inode->i_mapping); |
| 42 | if (!(inode->i_state & I_DIRTY)) |
| 43 | return ret; |
| 44 | if (datasync && !(inode->i_state & I_DIRTY_DATASYNC)) |
| 45 | return ret; |
| 46 | |
| 47 | err = ext2_sync_inode(inode); |
| 48 | if (ret == 0) |
| 49 | ret = err; |
| 50 | return ret; |
| 51 | } |