The VFS-level updates of the inode version. These may not be necessary
since the i_version is being updated in ext4_mark_iloc_dirty().
Signed-off-by: Jean Noel Cordenner <jean-noel.cordenner@xxxxxxxx>
---
binfmt_misc.c | 1 +
libfs.c | 9 +++++++++
pipe.c | 1 +
3 files changed, 11 insertions(+)
The patch modifies the i_version field of the inode on the VFS layer.
The i_version field become a 64bit counter that is set on inode creation and
that is incremented every time the inode data is modified (similarly to the
"ctime" time-stamp).
The aim is to fulfill a NFSv4 requirement for rfc3530:
"5.5. Mandatory Attributes - Definitions
Name # DataType Access Description
___________________________________________________________________
change 3 uint64 READ A value created by the
server that the client can use to determine if file
data, directory contents or attributes of the object
have been modified. The servermay return the object's
time_metadata attribute for this attribute's value but
only if the filesystem object can not be updated more
frequently than the resolution of time_metadata."
Signed-off-by: Jean Noel Cordenner <jean-noel.cordenner@xxxxxxxx>
Index: linux-2.6.22-rc4/fs/binfmt_misc.c
===================================================================
--- linux-2.6.22-rc4.orig/fs/binfmt_misc.c 2007-06-04 17:57:25.000000000 -0700
+++ linux-2.6.22-rc4/fs/binfmt_misc.c 2007-06-13 17:24:57.000000000 -0700
@@ -508,6 +508,7 @@ static struct inode *bm_get_inode(struct
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-2.6.22-rc4/fs/libfs.c
===================================================================
--- linux-2.6.22-rc4.orig/fs/libfs.c 2007-06-04 17:57:25.000000000 -0700
+++ linux-2.6.22-rc4/fs/libfs.c 2007-06-13 17:24:57.000000000 -0700
@@ -232,6 +232,7 @@ int get_sb_pseudo(struct file_system_typ
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);
@@ -255,6 +256,8 @@ int simple_link(struct dentry *old_dentr
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);
@@ -287,6 +290,8 @@ int simple_unlink(struct inode *dir, str
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;
@@ -323,6 +328,8 @@ int simple_rename(struct inode *old_dir,
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;
}
@@ -399,6 +406,7 @@ int simple_fill_super(struct super_block
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;
@@ -427,6 +435,7 @@ int simple_fill_super(struct super_block
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-2.6.22-rc4/fs/pipe.c
===================================================================
--- linux-2.6.22-rc4.orig/fs/pipe.c 2007-06-04 17:57:25.000000000 -0700
+++ linux-2.6.22-rc4/fs/pipe.c 2007-06-13 17:24:57.000000000 -0700
@@ -882,6 +882,7 @@ static struct inode * get_pipe_inode(voi
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;
