From feaa7bba026c181ce071d5a4884f7f9dd26207a1 Mon Sep 17 00:00:00 2001 From: Steven Whitehouse Date: Wed, 14 Jun 2006 15:32:57 -0400 Subject: [GFS2] Fix unlinked file handling This patch fixes the way we have been dealing with unlinked, but still open files. It removes all limits (other than memory for inodes, as per every other filesystem) on numbers of these which we can support on GFS2. It also means that (like other fs) its the responsibility of the last process to close the file to deallocate the storage, rather than the person who did the unlinking. Note that with GFS2, those two events might take place on different nodes. Also there are a number of other changes: o We use the Linux inode subsystem as it was intended to be used, wrt allocating GFS2 inodes o The Linux inode cache is now the point which we use for local enforcement of only holding one copy of the inode in core at once (previous to this we used the glock layer). o We no longer use the unlinked "special" file. We just ignore it completely. This makes unlinking more efficient. o We now use the 4th block allocation state. The previously unused state is used to track unlinked but still open inodes. o gfs2_inoded is no longer needed o Several fields are now no longer needed (and removed) from the in core struct gfs2_inode o Several fields are no longer needed (and removed) from the in core superblock There are a number of future possible optimisations and clean ups which have been made possible by this patch. Signed-off-by: Steven Whitehouse --- fs/gfs2/main.c | 2 -- 1 file changed, 2 deletions(-) (limited to 'fs/gfs2/main.c') diff --git a/fs/gfs2/main.c b/fs/gfs2/main.c index b24d0b40d965..c112943ee8c1 100644 --- a/fs/gfs2/main.c +++ b/fs/gfs2/main.c @@ -29,8 +29,6 @@ static void gfs2_init_inode_once(void *foo, kmem_cache_t *cachep, unsigned long if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) == SLAB_CTOR_CONSTRUCTOR) { inode_init_once(&ip->i_inode); - atomic_set(&ip->i_count, 0); - ip->i_vnode = &ip->i_inode; spin_lock_init(&ip->i_spin); init_rwsem(&ip->i_rw_mutex); memset(ip->i_cache, 0, sizeof(ip->i_cache)); -- cgit v1.2.3