use truncate time instead of current time during truncate list recove…

…ry (fix utsaslab#20)

Linux-5.1/fs/winefs/inode.c

@@ -632,8 +632,6 @@ static void __pmfs_truncate_blocks(struct inode *inode, loff_t start,
 	unsigned int meta_bits = META_BLK_SHIFT;
 	bool mpty;
 
-	inode->i_mtime = inode->i_ctime = current_time(inode);
-
 	if (!pi->root)
 		goto end_truncate_blocks;
 
@@ -2079,6 +2077,9 @@ void pmfs_truncate_add(struct inode *inode, u64 truncate_size)
 	pmfs_memunlock_range(sb, li, sizeof(*li));
 	li->i_next_truncate = head->i_next_truncate;
 	li->i_truncatesize = cpu_to_le64(truncate_size);
+	li->i_truncatemtime = cpu_to_le32(inode->i_mtime.tv_sec);
+	li->i_truncatectime = cpu_to_le32(inode->i_ctime.tv_sec);
+	li->i_timemarker = 1;
 	pmfs_memlock_range(sb, li, sizeof(*li));
 	pmfs_flush_buffer(li, sizeof(*li), false);
 	/* make sure above is persistent before changing the head pointer */
@@ -2117,6 +2118,7 @@ void pmfs_setsize(struct inode *inode, loff_t newsize)
 		pmfs_block_truncate_page(inode, newsize);
 		i_size_write(inode, newsize);
 	}
+
 	/* FIXME: we should make sure that there is nobody reading the inode
 	 * before truncating it. Also we need to munmap the truncated range
 	 * from application address space, if mmapped. */
@@ -2195,6 +2197,7 @@ int pmfs_notify_change(struct dentry *dentry, struct iattr *attr)
 	if ((ia_valid & ATTR_SIZE) && (attr->ia_size != inode->i_size ||
 			pi->i_flags & cpu_to_le32(PMFS_EOFBLOCKS_FL))) {
 
+		inode->i_mtime = inode->i_ctime = current_time(inode);
 		pmfs_truncate_add(inode, attr->ia_size);
 		/* set allocation hint */
 		//pmfs_set_blocksize_hint(sb, pi, attr->ia_size);

Linux-5.1/fs/winefs/inode.h

@@ -73,6 +73,9 @@ struct pmfs_inode_info_header {
 struct pmfs_inode_truncate_item {
 	__le64	i_truncatesize;     /* Size of truncated inode */
 	__le64  i_next_truncate;    /* inode num of the next truncated inode */
+	__le32 i_truncatemtime; /* The new mtime after the truncate operation */
+	__le32 i_truncatectime; /* The new ctime after the truncate operation */
+	u8 i_timemarker;
 };
 
 struct pmfs_inode_info {

Linux-5.1/fs/winefs/namei.c

@@ -365,9 +365,9 @@ static int pmfs_unlink(struct inode *dir, struct dentry *dentry)
 		goto end_unlink;
 
 	PMFS_START_TIMING(truncate_add_t, truncate_add_time);
+	inode->i_ctime = dir->i_ctime;
 	if (inode->i_nlink == 1)
 		pmfs_truncate_add(inode, inode->i_size);
-	inode->i_ctime = dir->i_ctime;
 	PMFS_END_TIMING(truncate_add_t, truncate_add_time);
 
 	pmfs_memunlock_inode(sb, pi);

Linux-5.1/fs/winefs/super.c

@@ -705,13 +705,19 @@ static void pmfs_recover_truncate_list(struct super_block *sb)
 		inode = pmfs_iget(sb, ino_next);
 		if (IS_ERR(inode))
 			break;
-		pmfs_dbg("Recover ino %llx nlink %d sz %llx:%llx\n", ino_next,
-			inode->i_nlink, pi->i_size, li->i_truncatesize);
+		pmfs_dbg("Recover ino %llx nlink %d sz %llx:%llx mtime %x ctime %x\n", ino_next,
+			inode->i_nlink, pi->i_size, li->i_truncatesize, li->i_truncatemtime, li->i_truncatectime);
 		if (inode->i_nlink) {
 			/* set allocation hint */
 			/*pmfs_set_blocksize_hint(sb, pi, 
 					le64_to_cpu(li->i_truncatesize));
 			*/
+			if(li->i_timemarker != 0) {
+				inode->i_mtime.tv_sec = le32_to_cpu(li->i_truncatemtime);
+				inode->i_ctime.tv_sec = le32_to_cpu(li->i_truncatectime);
+			} else {
+				inode->i_mtime = inode->i_ctime = current_time(inode);
+			}
 			pmfs_setsize(inode, le64_to_cpu(li->i_truncatesize));
 			pmfs_update_isize(inode, pi);
 		} else {