patch-2.4.0-test9 linux/fs/minix/fsync.c

• Lines: 345
• Date: Wed Dec 31 16:00:00 1969
• Orig file: v2.4.0-test8/linux/fs/minix/fsync.c
• Orig date: Thu Jun 29 16:01:11 2000

diff -u --recursive --new-file v2.4.0-test8/linux/fs/minix/fsync.c linux/fs/minix/fsync.c
@@ -1,344 +0,0 @@
-/*
- *  linux/fs/minix/fsync.c
- *
- *  Copyright (C) 1993 Stephen Tweedie (sct@dcs.ed.ac.uk)
- *  from
- *  Copyright (C) 1991, 1992 Linus Torvalds
- *
- *  Copyright (C) 1996 Gertjan van Wingerde (gertjan@cs.vu.nl)
- *	Minix V2 fs support
- *
- *  minix fsync primitive
- */
-
-#include <linux/errno.h>
-#include <linux/sched.h>
-#include <linux/stat.h>
-#include <linux/fcntl.h>
-#include <linux/locks.h>
-#include <linux/smp_lock.h>
-
-#include <linux/fs.h>
-#include <linux/minix_fs.h>
-
-#include <asm/uaccess.h>
-#include <asm/system.h>
-
-#define blocksize BLOCK_SIZE
-
-/*
- * The functions for minix V1 fs file synchronization.
- */
-static int V1_sync_block (struct inode * inode, unsigned short * block, int wait)
-{
-	struct buffer_head * bh;
-	unsigned short 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);
-	atomic_dec(&bh->b_count);
-	return 0;
-}
-
-static int V1_sync_iblock (struct inode * inode, unsigned short * iblock, 
-			struct buffer_head **bh, int wait) 
-{
-	int rc;
-	unsigned short tmp;
-	
-	*bh = NULL;
-	tmp = *iblock;
-	if (!tmp)
-		return 0;
-	rc = V1_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 V1_sync_direct(struct inode *inode, int wait)
-{
-	int i;
-	int rc, err = 0;
-
-	for (i = 0; i < 7; i++) {
-		rc = V1_sync_block (inode, 
-		     (unsigned short *) inode->u.minix_i.u.i1_data + i, wait);
-		if (rc > 0)
-			break;
-		if (rc)
-			err = rc;
-	}
-	return err;
-}
-
-static int V1_sync_indirect(struct inode *inode, unsigned short *iblock, int wait)
-{
-	int i;
-	struct buffer_head * ind_bh;
-	int rc, err = 0;
-
-	rc = V1_sync_iblock (inode, iblock, &ind_bh, wait);
-	if (rc || !ind_bh)
-		return rc;
-
-	for (i = 0; i < 512; i++) {
-		rc = V1_sync_block (inode, 
-				    ((unsigned short *) ind_bh->b_data) + i, 
-				    wait);
-		if (rc > 0)
-			break;
-		if (rc)
-			err = rc;
-	}
-	brelse(ind_bh);
-	return err;
-}
-
-static int V1_sync_dindirect(struct inode *inode, unsigned short *diblock,
-			  int wait)
-{
-	int i;
-	struct buffer_head * dind_bh;
-	int rc, err = 0;
-
-	rc = V1_sync_iblock (inode, diblock, &dind_bh, wait);
-	if (rc || !dind_bh)
-		return rc;
-
-	for (i = 0; i < 512; i++) {
-		rc = V1_sync_indirect (inode,
-				       ((unsigned short *) dind_bh->b_data) + i, 
-				       wait);
-		if (rc > 0)
-			break;
-		if (rc)
-			err = rc;
-	}
-	brelse(dind_bh);
-	return err;
-}
-
-static int V1_minix_sync_file(struct inode * inode, struct file * file)
-{
-	int wait, err = 0;
-	
-	lock_kernel();
-	for (wait=0; wait<=1; wait++)
-	{
-		err |= V1_sync_direct(inode, wait);
-		err |= V1_sync_indirect(inode, inode->u.minix_i.u.i1_data + 7, wait);
-		err |= V1_sync_dindirect(inode, inode->u.minix_i.u.i1_data + 8, wait);
-	}
-	err |= minix_sync_inode (inode);
-	unlock_kernel();
-	return (err < 0) ? -EIO : 0;
-}
-
-/* 
- * The functions for minix V2 fs file synchronization.
- */
-static int V2_sync_block (struct inode * inode, unsigned long * block, int wait)
-{
-	struct buffer_head * bh;
-	unsigned long 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);
-	atomic_dec(&bh->b_count);
-	return 0;
-}
-
-static int V2_sync_iblock (struct inode * inode, unsigned long * iblock, 
-			struct buffer_head **bh, int wait) 
-{
-	int rc;
-	unsigned long tmp;
-	
-	*bh = NULL;
-	tmp = *iblock;
-	if (!tmp)
-		return 0;
-	rc = V2_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 V2_sync_direct(struct inode *inode, int wait)
-{
-	int i;
-	int rc, err = 0;
-
-	for (i = 0; i < 7; i++) {
-		rc = V2_sync_block (inode, 
-			(unsigned long *)inode->u.minix_i.u.i2_data + i, wait);
-		if (rc > 0)
-			break;
-		if (rc)
-			err = rc;
-	}
-	return err;
-}
-
-static int V2_sync_indirect(struct inode *inode, unsigned long *iblock, int wait)
-{
-	int i;
-	struct buffer_head * ind_bh;
-	int rc, err = 0;
-
-	rc = V2_sync_iblock (inode, iblock, &ind_bh, wait);
-	if (rc || !ind_bh)
-		return rc;
-
-	for (i = 0; i < 256; i++) {
-		rc = V2_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 V2_sync_dindirect(struct inode *inode, unsigned long *diblock,
-			  int wait)
-{
-	int i;
-	struct buffer_head * dind_bh;
-	int rc, err = 0;
-
-	rc = V2_sync_iblock (inode, diblock, &dind_bh, wait);
-	if (rc || !dind_bh)
-		return rc;
-
-	for (i = 0; i < 256; i++) {
-		rc = V2_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 V2_sync_tindirect(struct inode *inode, unsigned long *tiblock,
-			  int wait)
-{
-	int i;
-	struct buffer_head * tind_bh;
-	int rc, err = 0;
-
-	rc = V2_sync_iblock (inode, tiblock, &tind_bh, wait);
-	if (rc || !tind_bh)
-		return rc;
-
-	for (i = 0; i < 256; i++) {
-		rc = V2_sync_dindirect (inode,
-					((unsigned long *) tind_bh->b_data) + i, 
-					wait);
-		if (rc > 0)
-			break;
-		if (rc)
-			err = rc;
-	}
-	brelse(tind_bh);
-	return err;
-}
-
-static int V2_minix_sync_file(struct inode * inode, struct file * file)
-{
-	int wait, err = 0;
-	
-	lock_kernel();
-	for (wait=0; wait<=1; wait++)
-	{
-		err |= V2_sync_direct(inode, wait);
-		err |= V2_sync_indirect(inode, 
-		      (unsigned long *) inode->u.minix_i.u.i2_data + 7, wait);
-		err |= V2_sync_dindirect(inode, 
-		      (unsigned long *) inode->u.minix_i.u.i2_data + 8, wait);
-		err |= V2_sync_tindirect(inode, 
-		      (unsigned long *) inode->u.minix_i.u.i2_data + 9, wait);
-	}
-	err |= minix_sync_inode (inode);
-	unlock_kernel();
-	return (err < 0) ? -EIO : 0;
-}
-
-/*
- *	The function which is called for file synchronization. File may be
- *	NULL
- */
- 
-int minix_sync_file(struct file * file, struct dentry *dentry, int datasync)
-{
-	struct inode *inode = dentry->d_inode;
-	
-	if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
-	     S_ISLNK(inode->i_mode)))
-		return -EINVAL;
-
-	if (INODE_VERSION(inode) == MINIX_V1)
-		return V1_minix_sync_file(inode, file);
-	else
-		return V2_minix_sync_file(inode, file);
-}