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| author | Jean Noel Cordenner <jean-noel.cordenner@bull.net> | 2008-01-28 23:58:27 -0500 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2008-01-28 23:58:27 -0500 |
| commit | 7a224228ed79d587ece2304869000aad1b8e97dd (patch) | |
| tree | f2b299f5a5d04cf8d3d0ef10ff264bd34943f90e /fs | |
| parent | 818d276ceb83aa9fdebb5e0a53188290312de987 (diff) | |
| download | linux-7a224228ed79d587ece2304869000aad1b8e97dd.tar.bz2 | |
vfs: Add 64 bit i_version support
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>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/afs/dir.c | 9 | ||||
| -rw-r--r-- | fs/afs/inode.c | 3 | ||||
| -rw-r--r-- | fs/inode.c | 22 |
3 files changed, 29 insertions, 5 deletions
diff --git a/fs/afs/dir.c b/fs/afs/dir.c index 33fe39ad4e03..0cc3597c1197 100644 --- a/fs/afs/dir.c +++ b/fs/afs/dir.c @@ -546,11 +546,11 @@ static struct dentry *afs_lookup(struct inode *dir, struct dentry *dentry, dentry->d_op = &afs_fs_dentry_operations; d_add(dentry, inode); - _leave(" = 0 { vn=%u u=%u } -> { ino=%lu v=%lu }", + _leave(" = 0 { vn=%u u=%u } -> { ino=%lu v=%llu }", fid.vnode, fid.unique, dentry->d_inode->i_ino, - dentry->d_inode->i_version); + (unsigned long long)dentry->d_inode->i_version); return NULL; } @@ -630,9 +630,10 @@ static int afs_d_revalidate(struct dentry *dentry, struct nameidata *nd) * been deleted and replaced, and the original vnode ID has * been reused */ if (fid.unique != vnode->fid.unique) { - _debug("%s: file deleted (uq %u -> %u I:%lu)", + _debug("%s: file deleted (uq %u -> %u I:%llu)", dentry->d_name.name, fid.unique, - vnode->fid.unique, dentry->d_inode->i_version); + vnode->fid.unique, + (unsigned long long)dentry->d_inode->i_version); spin_lock(&vnode->lock); set_bit(AFS_VNODE_DELETED, &vnode->flags); spin_unlock(&vnode->lock); diff --git a/fs/afs/inode.c b/fs/afs/inode.c index d196840127c6..84750c8e9f95 100644 --- a/fs/afs/inode.c +++ b/fs/afs/inode.c @@ -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; diff --git a/fs/inode.c b/fs/inode.c index ed35383d0b6c..b48324a94c2b 100644 --- a/fs/inode.c +++ b/fs/inode.c @@ -1243,6 +1243,23 @@ void touch_atime(struct vfsmount *mnt, struct dentry *dentry) EXPORT_SYMBOL(touch_atime); /** + * inode_inc_iversion - increments i_version + * @inode: inode that need to be updated + * + * Every time the inode is modified, the i_version field + * will be incremented. + * The filesystem has to be mounted with i_version flag + * + */ + +void inode_inc_iversion(struct inode *inode) +{ + spin_lock(&inode->i_lock); + inode->i_version++; + spin_unlock(&inode->i_lock); +} + +/** * file_update_time - update mtime and ctime time * @file: file accessed * @@ -1276,6 +1293,11 @@ void file_update_time(struct file *file) sync_it = 1; } + if (IS_I_VERSION(inode)) { + inode_inc_iversion(inode); + sync_it = 1; + } + if (sync_it) mark_inode_dirty_sync(inode); } |