[RFC] [patch 1/2] i_version update - vfs part

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Concerning the first part of the set, the i_version field of the inode
structure has been reused. The field  has been redefined from unsigned
long to unsigned long long as the counter has to be 64bit.

Signed-off-by: Jean Noel Cordenner <jean-noel.cordenner@xxxxxxxx>

fs/binfmt_misc.c   |    1 +
fs/libfs.c         |    9 +++++++++
fs/pipe.c          |    1 +
include/linux/fs.h |    2 +-

Index: linux-2.6.21-rc4-i_version/fs/binfmt_misc.c
===================================================================
--- linux-2.6.21-rc4-i_version.orig/fs/binfmt_misc.c	2007-05-10 14:14:48.000000000 +0200
+++ linux-2.6.21-rc4-i_version/fs/binfmt_misc.c	2007-05-10 14:18:45.000000000 +0200
@@ -508,6 +508,7 @@
 		inode->i_blocks = 0;
 		inode->i_atime = inode->i_mtime = inode->i_ctime =
 			current_fs_time(inode->i_sb);
+		inode->i_version = 1;
 	}
 	return inode;
 }
Index: linux-2.6.21-rc4-i_version/fs/libfs.c
===================================================================
--- linux-2.6.21-rc4-i_version.orig/fs/libfs.c	2007-05-10 14:14:48.000000000 +0200
+++ linux-2.6.21-rc4-i_version/fs/libfs.c	2007-05-10 17:26:13.000000000 +0200
@@ -223,6 +223,7 @@
 	root->i_mode = S_IFDIR | S_IRUSR | S_IWUSR;
 	root->i_uid = root->i_gid = 0;
 	root->i_atime = root->i_mtime = root->i_ctime = CURRENT_TIME;
+	root->i_version = 1;
 	dentry = d_alloc(NULL, &d_name);
 	if (!dentry) {
 		iput(root);
@@ -246,6 +247,8 @@
 	struct inode *inode = old_dentry->d_inode;
 
 	inode->i_ctime = dir->i_ctime = dir->i_mtime = CURRENT_TIME;
+	inode->i_version++;
+	dir->i_version++;
 	inc_nlink(inode);
 	atomic_inc(&inode->i_count);
 	dget(dentry);
@@ -278,6 +281,8 @@
 	struct inode *inode = dentry->d_inode;
 
 	inode->i_ctime = dir->i_ctime = dir->i_mtime = CURRENT_TIME;
+	inode->i_version++;
+	dir->i_version++;
 	drop_nlink(inode);
 	dput(dentry);
 	return 0;
@@ -314,6 +319,8 @@
 
 	old_dir->i_ctime = old_dir->i_mtime = new_dir->i_ctime =
 		new_dir->i_mtime = inode->i_ctime = CURRENT_TIME;
+	old_dir->i_version++;
+	new_dir->i_version++;
 
 	return 0;
 }
@@ -380,6 +387,7 @@
 	inode->i_uid = inode->i_gid = 0;
 	inode->i_blocks = 0;
 	inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
+	inode->i_version = 1;
 	inode->i_op = &simple_dir_inode_operations;
 	inode->i_fop = &simple_dir_operations;
 	inode->i_nlink = 2;
@@ -401,6 +409,7 @@
 		inode->i_uid = inode->i_gid = 0;
 		inode->i_blocks = 0;
 		inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
+		inode->i_version = 1;
 		inode->i_fop = files->ops;
 		inode->i_ino = i;
 		d_add(dentry, inode);
Index: linux-2.6.21-rc4-i_version/fs/pipe.c
===================================================================
--- linux-2.6.21-rc4-i_version.orig/fs/pipe.c	2007-05-10 14:14:48.000000000 +0200
+++ linux-2.6.21-rc4-i_version/fs/pipe.c	2007-05-10 14:18:45.000000000 +0200
@@ -872,6 +872,7 @@
 	inode->i_uid = current->fsuid;
 	inode->i_gid = current->fsgid;
 	inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
+	inode->i_version = 1;
 
 	return inode;
 
Index: linux-2.6.21-rc4-i_version/include/linux/fs.h
===================================================================
--- linux-2.6.21-rc4-i_version.orig/include/linux/fs.h	2007-04-26 16:23:59.000000000 +0200
+++ linux-2.6.21-rc4-i_version/include/linux/fs.h	2007-05-10 17:23:38.000000000 +0200
@@ -536,7 +536,7 @@
 	uid_t			i_uid;
 	gid_t			i_gid;
 	dev_t			i_rdev;
-	unsigned long		i_version;
+	unsigned long long	i_version;
 	loff_t			i_size;
 #ifdef __NEED_I_SIZE_ORDERED
 	seqcount_t		i_size_seqcount;


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