patch-2.1.21 linux/fs/ext/fsync.c

• Lines: 186
• Date: Thu Jan 1 02:00:00 1970
• Orig file: v2.1.20/linux/fs/ext/fsync.c
• Orig date: Tue Oct 29 19:58:20 1996

diff -u --recursive --new-file v2.1.20/linux/fs/ext/fsync.c linux/fs/ext/fsync.c
@@ -1,185 +0,0 @@
-
-/*
- *  linux/fs/ext/fsync.c
- *
- *  Copyright (C) 1993  Stephen Tweedie (sct@dcs.ed.ac.uk)
- *  from
- *  Copyright (C) 1992  Remy Card (card@masi.ibp.fr)
- *  from
- *  linux/fs/minix/truncate.c   Copyright (C) 1991, 1992  Linus Torvalds
- * 
- *  extfs fsync primitive
- */
-
-#include <asm/uaccess.h>
-#include <asm/system.h>
-
-#include <linux/errno.h>
-#include <linux/sched.h>
-#include <linux/stat.h>
-#include <linux/fcntl.h>
-#include <linux/locks.h>
-
-#include <linux/fs.h>
-#include <linux/ext_fs.h>
-
-
-#define blocksize BLOCK_SIZE
-#define addr_per_block 256
-
-static int sync_block (struct inode * inode, unsigned long * block, int wait)
-{
-	struct buffer_head * bh;
-	int tmp;
-	
-	if (!*block)
-		return 0;
-	tmp = *block;
-	bh = get_hash_table(inode->i_dev, *block, blocksize);
-	if (!bh)
-		return 0;
-	if (*block != tmp) {
-		brelse (bh);
-		return 1;
-	}
-	if (wait && buffer_req(bh) && !buffer_uptodate(bh)) {
-		brelse(bh);
-		return -1;
-	}
-	if (wait || !buffer_uptodate(bh) || !buffer_dirty(bh))
-	{
-		brelse(bh);
-		return 0;
-	}
-	ll_rw_block(WRITE, 1, &bh);
-	bh->b_count--;
-	return 0;
-}
-
-static int sync_iblock (struct inode * inode, unsigned long * iblock, 
-			struct buffer_head **bh, int wait) 
-{
-	int rc, tmp;
-	
-	*bh = NULL;
-	tmp = *iblock;
-	if (!tmp)
-		return 0;
-	rc = sync_block (inode, iblock, wait);
-	if (rc)
-		return rc;
-	*bh = bread(inode->i_dev, tmp, blocksize);
-	if (tmp != *iblock) {
-		brelse(*bh);
-		*bh = NULL;
-		return 1;
-	}
-	if (!*bh)
-		return -1;
-	return 0;
-}
-
-
-static int sync_direct(struct inode *inode, int wait)
-{
-	int i;
-	int rc, err = 0;
-
-	for (i = 0; i < 9; i++) {
-		rc = sync_block (inode, inode->u.ext_i.i_data + i, wait);
-		if (rc > 0)
-			break;
-		if (rc)
-			err = rc;
-	}
-	return err;
-}
-
-static int sync_indirect(struct inode *inode, unsigned long *iblock, int wait)
-{
-	int i;
-	struct buffer_head * ind_bh;
-	int rc, err = 0;
-
-	rc = sync_iblock (inode, iblock, &ind_bh, wait);
-	if (rc || !ind_bh)
-		return rc;
-	
-	for (i = 0; i < addr_per_block; i++) {
-		rc = sync_block (inode, 
-				 ((unsigned long *) ind_bh->b_data) + i,
-				 wait);
-		if (rc > 0)
-			break;
-		if (rc)
-			err = rc;
-	}
-	brelse(ind_bh);
-	return err;
-}
-
-static int sync_dindirect(struct inode *inode, unsigned long *diblock,
-			  int wait)
-{
-	int i;
-	struct buffer_head * dind_bh;
-	int rc, err = 0;
-
-	rc = sync_iblock (inode, diblock, &dind_bh, wait);
-	if (rc || !dind_bh)
-		return rc;
-	
-	for (i = 0; i < addr_per_block; i++) {
-		rc = sync_indirect (inode,
-				    ((unsigned long *) dind_bh->b_data) + i,
-				    wait);
-		if (rc > 0)
-			break;
-		if (rc)
-			err = rc;
-	}
-	brelse(dind_bh);
-	return err;
-}
-
-static int sync_tindirect(struct inode *inode, unsigned long *tiblock, 
-			  int wait)
-{
-	int i;
-	struct buffer_head * tind_bh;
-	int rc, err = 0;
-
-	rc = sync_iblock (inode, tiblock, &tind_bh, wait);
-	if (rc || !tind_bh)
-		return rc;
-	
-	for (i = 0; i < addr_per_block; i++) {
-		rc = sync_dindirect (inode,
-				     ((unsigned long *) tind_bh->b_data) + i,
-				     wait);
-		if (rc > 0)
-			break;
-		if (rc)
-			err = rc;
-	}
-	brelse(tind_bh);
-	return err;
-}
-
-int ext_sync_file(struct inode * inode, struct file *file)
-{
-	int wait, err = 0;
-
-	if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
-	     S_ISLNK(inode->i_mode)))
-		return -EINVAL;
-	for (wait=0; wait<=1; wait++)
-	{
-		err |= sync_direct(inode, wait);
-		err |= sync_indirect(inode, inode->u.ext_i.i_data+9, wait);
-		err |= sync_dindirect(inode, inode->u.ext_i.i_data+10, wait);
-		err |= sync_tindirect(inode, inode->u.ext_i.i_data+11, wait);
-	}
-	err |= ext_sync_inode (inode);
-	return (err < 0) ? -EIO : 0;
-}