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/ops_vm.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) (limited to 'fs/gfs2/ops_vm.c') diff --git a/fs/gfs2/ops_vm.c b/fs/gfs2/ops_vm.c index 263c1fb7bbaf..08709f19ea98 100644 --- a/fs/gfs2/ops_vm.c +++ b/fs/gfs2/ops_vm.c @@ -38,15 +38,15 @@ static void pfault_be_greedy(struct gfs2_inode *ip) ip->i_last_pfault = jiffies; spin_unlock(&ip->i_spin); - gfs2_inode_hold(ip); + igrab(&ip->i_inode); if (gfs2_glock_be_greedy(ip->i_gl, time)) - gfs2_inode_put(ip); + iput(&ip->i_inode); } static struct page *gfs2_private_nopage(struct vm_area_struct *area, unsigned long address, int *type) { - struct gfs2_inode *ip = area->vm_file->f_mapping->host->u.generic_ip; + struct gfs2_inode *ip = GFS2_I(area->vm_file->f_mapping->host); struct gfs2_holder i_gh; struct page *result; int error; @@ -69,7 +69,7 @@ static struct page *gfs2_private_nopage(struct vm_area_struct *area, static int alloc_page_backing(struct gfs2_inode *ip, struct page *page) { - struct gfs2_sbd *sdp = ip->i_sbd; + struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); unsigned long index = page->index; uint64_t lblock = index << (PAGE_CACHE_SHIFT - sdp->sd_sb.sb_bsize_shift); @@ -114,7 +114,7 @@ static int alloc_page_backing(struct gfs2_inode *ip, struct page *page) unsigned int extlen; int new = 1; - error = gfs2_extent_map(ip->i_vnode, lblock, &new, &dblock, &extlen); + error = gfs2_extent_map(&ip->i_inode, lblock, &new, &dblock, &extlen); if (error) goto out_trans; @@ -142,7 +142,7 @@ static int alloc_page_backing(struct gfs2_inode *ip, struct page *page) static struct page *gfs2_sharewrite_nopage(struct vm_area_struct *area, unsigned long address, int *type) { - struct gfs2_inode *ip = area->vm_file->f_mapping->host->u.generic_ip; + struct gfs2_inode *ip = GFS2_I(area->vm_file->f_mapping->host); struct gfs2_holder i_gh; struct page *result = NULL; unsigned long index = ((address - area->vm_start) >> PAGE_CACHE_SHIFT) + -- cgit v1.2.3