patch-2.4.6 linux/fs/sysv/fsync.c

• Lines: 201
• Date: Wed Dec 31 16:00:00 1969
• Orig file: v2.4.5/linux/fs/sysv/fsync.c
• Orig date: Thu Jun 29 16:06:54 2000

diff -u --recursive --new-file v2.4.5/linux/fs/sysv/fsync.c linux/fs/sysv/fsync.c
@@ -1,200 +0,0 @@
-/*
- *  linux/fs/sysv/fsync.c
- *
- *  minix/fsync.c
- *  Copyright (C) 1991, 1992  Linus Torvalds
- *  Copyright (C) 1993  Stephen Tweedie (sct@dcs.ed.ac.uk)
- *
- *  coh/fsync.c
- *  Copyright (C) 1993  Pascal Haible, Bruno Haible
- *
- *  sysv/fsync.c
- *  Copyright (C) 1993  Bruno Haible
- *
- *  SystemV/Coherent fsync primitive
- */
-
-#include <linux/errno.h>
-#include <linux/stat.h>
-#include <linux/fs.h>
-#include <linux/sysv_fs.h>
-#include <linux/smp_lock.h>
-
-
-/* return values: 0 means OK/done, 1 means redo, -1 means I/O error. */
-
-/* Sync one block. The block number is
- * from_coh_ulong(*blockp) if convert=1, *blockp if convert=0.
- */
-static int sync_block (struct inode * inode, u32 *blockp, int convert, int wait)
-{
-	struct buffer_head * bh;
-	u32 tmp, block;
-	struct super_block * sb;
-
-	block = tmp = *blockp;
-	if (convert)
-		block = from_coh_ulong(block);
-	if (!block)
-		return 0;
-	sb = inode->i_sb;
-	bh = sv_get_hash_table(sb, inode->i_dev, block);
-	if (!bh)
-		return 0;
-	if (*blockp != 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;
-}
-
-/* Sync one block full of indirect pointers and read it because we'll need it. */
-static int sync_iblock (struct inode * inode, u32 * iblockp, int convert,
-			struct buffer_head * *bh, int wait)
-{
-	int rc;
-	u32 tmp, block;
-
-	*bh = NULL;
-	block = tmp = *iblockp;
-	if (convert)
-		block = from_coh_ulong(block);
-	if (!block)
-		return 0;
-	rc = sync_block (inode, iblockp, convert, wait);
-	if (rc)
-		return rc;
-	*bh = sv_bread(inode->i_sb, inode->i_dev, block);
-	if (tmp != *iblockp) {
-		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 < 10; i++) {
-		rc = sync_block (inode, inode->u.sysv_i.i_data + i, 0, wait);
-		if (rc > 0)
-			break;
-		if (rc)
-			err = rc;
-	}
-	return err;
-}
-
-static int sync_indirect(struct inode *inode, u32 *iblockp, int convert, int wait)
-{
-	int i;
-	struct buffer_head * ind_bh;
-	int rc, err = 0;
-	struct super_block * sb;
-
-	rc = sync_iblock (inode, iblockp, convert, &ind_bh, wait);
-	if (rc || !ind_bh)
-		return rc;
-
-	sb = inode->i_sb;
-	for (i = 0; i < sb->sv_ind_per_block; i++) {
-		rc = sync_block (inode,
-				 ((u32 *) ind_bh->b_data) + i, sb->sv_convert,
-				 wait);
-		if (rc > 0)
-			break;
-		if (rc)
-			err = rc;
-	}
-	brelse(ind_bh);
-	return err;
-}
-
-static int sync_dindirect(struct inode *inode, u32 *diblockp, int convert,
-			  int wait)
-{
-	int i;
-	struct buffer_head * dind_bh;
-	int rc, err = 0;
-	struct super_block * sb;
-
-	rc = sync_iblock (inode, diblockp, convert, &dind_bh, wait);
-	if (rc || !dind_bh)
-		return rc;
-
-	sb = inode->i_sb;
-	for (i = 0; i < sb->sv_ind_per_block; i++) {
-		rc = sync_indirect (inode,
-				    ((u32 *) dind_bh->b_data) + i, sb->sv_convert,
-				    wait);
-		if (rc > 0)
-			break;
-		if (rc)
-			err = rc;
-	}
-	brelse(dind_bh);
-	return err;
-}
-
-static int sync_tindirect(struct inode *inode, u32 *tiblockp, int convert,
-			  int wait)
-{
-	int i;
-	struct buffer_head * tind_bh;
-	int rc, err = 0;
-	struct super_block * sb;
-
-	rc = sync_iblock (inode, tiblockp, convert, &tind_bh, wait);
-	if (rc || !tind_bh)
-		return rc;
-
-	sb = inode->i_sb;
-	for (i = 0; i < sb->sv_ind_per_block; i++) {
-		rc = sync_dindirect (inode,
-				     ((u32 *) tind_bh->b_data) + i, sb->sv_convert,
-				     wait);
-		if (rc > 0)
-			break;
-		if (rc)
-			err = rc;
-	}
-	brelse(tind_bh);
-	return err;
-}
-
-int sysv_sync_file(struct file * file, struct dentry *dentry, int datasync)
-{
-	int wait, err = 0;
-	struct inode *inode = dentry->d_inode;
-
-	if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
-	     S_ISLNK(inode->i_mode)))
-		return -EINVAL;
-
-	lock_kernel();
-	for (wait=0; wait<=1; wait++) {
-		err |= sync_direct(inode, wait);
-		err |= sync_indirect(inode, inode->u.sysv_i.i_data+10, 0, wait);
-		err |= sync_dindirect(inode, inode->u.sysv_i.i_data+11, 0, wait);
-		err |= sync_tindirect(inode, inode->u.sysv_i.i_data+12, 0, wait);
-	}
-	err |= sysv_sync_inode (inode);
-	unlock_kernel();
-	return (err < 0) ? -EIO : 0;
-}