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vfs: Add 64 bit i_version support

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The i_version field of the inode is changed to be a 64-bit counter that
is set on every 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.
This first part concerns the vfs, it converts the 32-bit i_version in
the generic inode to a 64-bit, a flag is added in the super block in
order to check if the feature is enabled and the i_version is
incremented in the vfs.

Signed-off-by: Mingming Cao <cmm@us.ibm.com>
Signed-off-by: Jean Noel Cordenner <jean-noel.cordenner@bull.net>
Signed-off-by: Kalpak Shah <kalpak@clusterfs.com>
This commit is contained in:
Jean Noel Cordenner
2008-01-28 23:58:27 -05:00
committed by Theodore Ts'o
parent 818d276ceb
commit 7a224228ed
4 changed files with 33 additions and 6 deletions
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3
fs/afs/inode.c
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@@ -301,7 +301,8 @@ int afs_getattr(struct vfsmount *mnt, struct dentry *dentry,
inode = dentry->d_inode;
_enter("{ ino=%lu v=%lu }", inode->i_ino, inode->i_version);
_enter("{ ino=%lu v=%llu }", inode->i_ino,
(unsigned long long)inode->i_version);
generic_fillattr(inode, stat);
return 0;