[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 <swhiteho@redhat.com>

1 files changed, 176 insertions, 633 deletions

diff --git a/fs/gfs2/inode.c b/fs/gfs2/inode.c
index c2c7d2b63a5..4e9c42119ae 100644
--- a/fs/gfs2/inode.c
+++ b/fs/gfs2/inode.c
@@ -35,7 +35,6 @@
 #include "quota.h"
 #include "rgrp.h"
 #include "trans.h"
-#include "unlinked.h"
 #include "util.h"
 
 /**
@@ -72,7 +71,7 @@ static void inode_attr_in(struct gfs2_inode *ip, struct inode *inode)
 	inode->i_ctime.tv_nsec = 0;
 	inode->i_blksize = PAGE_SIZE;
 	inode->i_blocks = ip->i_di.di_blocks <<
-		(ip->i_sbd->sd_sb.sb_bsize_shift - GFS2_BASIC_BLOCK_SHIFT);
+		(GFS2_SB(inode)->sd_sb.sb_bsize_shift - GFS2_BASIC_BLOCK_SHIFT);
 
 	if (ip->i_di.di_flags & GFS2_DIF_IMMUTABLE)
 		inode->i_flags |= S_IMMUTABLE;
@@ -93,13 +92,8 @@ static void inode_attr_in(struct gfs2_inode *ip, struct inode *inode)
 
 void gfs2_inode_attr_in(struct gfs2_inode *ip)
 {
-	struct inode *inode;
-
-	inode = gfs2_ip2v_lookup(ip);
-	if (inode) {
-		inode_attr_in(ip, inode);
-		iput(inode);
-	}
+	struct inode *inode = &ip->i_inode;
+	inode_attr_in(ip, inode);
 }
 
 /**
@@ -112,9 +106,9 @@ void gfs2_inode_attr_in(struct gfs2_inode *ip)
 
 void gfs2_inode_attr_out(struct gfs2_inode *ip)
 {
-	struct inode *inode = ip->i_vnode;
+	struct inode *inode = &ip->i_inode;
 
-	gfs2_assert_withdraw(ip->i_sbd,
+	gfs2_assert_withdraw(GFS2_SB(inode),
 		(ip->i_di.di_mode & S_IFMT) == (inode->i_mode & S_IFMT));
 	ip->i_di.di_mode = inode->i_mode;
 	ip->i_di.di_uid = inode->i_uid;
@@ -124,114 +118,100 @@ void gfs2_inode_attr_out(struct gfs2_inode *ip)
 	ip->i_di.di_ctime = inode->i_ctime.tv_sec;
 }
 
-/**
- * gfs2_ip2v_lookup - Get the struct inode for a struct gfs2_inode
- * @ip: the struct gfs2_inode to get the struct inode for
- *
- * Returns: A VFS inode, or NULL if none
- */
+static int iget_test(struct inode *inode, void *opaque)
+{
+	struct gfs2_inode *ip = GFS2_I(inode);
+	struct gfs2_inum *inum = opaque;
+
+	if (ip && ip->i_num.no_addr == inum->no_addr)
+		return 1;
 
-struct inode *gfs2_ip2v_lookup(struct gfs2_inode *ip)
+	return 0;
+}
+
+static int iget_set(struct inode *inode, void *opaque)
 {
-	struct inode *inode = NULL;
+	struct gfs2_inode *ip = GFS2_I(inode);
+	struct gfs2_inum *inum = opaque;
 
-	gfs2_assert_warn(ip->i_sbd, test_bit(GIF_MIN_INIT, &ip->i_flags));
+	ip->i_num = *inum;
+	return 0;
+}
 
-	spin_lock(&ip->i_spin);
-	if (ip->i_vnode)
-		inode = igrab(ip->i_vnode);
-	spin_unlock(&ip->i_spin);
+struct inode *gfs2_ilookup(struct super_block *sb, struct gfs2_inum *inum)
+{
+	return ilookup5(sb, (unsigned long)inum->no_formal_ino,
+			iget_test, inum);
+}
 
-	return inode;
+static struct inode *gfs2_iget(struct super_block *sb, struct gfs2_inum *inum)
+{
+	return iget5_locked(sb, (unsigned long)inum->no_formal_ino,
+		     iget_test, iget_set, inum);
 }
 
 /**
- * gfs2_ip2v - Get/Create a struct inode for a struct gfs2_inode
- * @ip: the struct gfs2_inode to get the struct inode for
+ * gfs2_inode_lookup - Lookup an inode
+ * @sb: The super block
+ * @inum: The inode number
+ * @type: The type of the inode
  *
- * Returns: A VFS inode, or NULL if no mem
+ * Returns: A VFS inode, or an error
  */
 
-struct inode *gfs2_ip2v(struct gfs2_inode *ip)
+struct inode *gfs2_inode_lookup(struct super_block *sb, struct gfs2_inum *inum, unsigned int type)
 {
-	struct inode *inode, *tmp;
-
-	inode = gfs2_ip2v_lookup(ip);
-	if (inode)
-		return inode;
-
-	tmp = new_inode(ip->i_sbd->sd_vfs);
-	if (!tmp)
-		return NULL;
-
-	inode_attr_in(ip, tmp);
-
-	if (S_ISREG(ip->i_di.di_mode)) {
-		tmp->i_op = &gfs2_file_iops;
-		tmp->i_fop = &gfs2_file_fops;
-		tmp->i_mapping->a_ops = &gfs2_file_aops;
-	} else if (S_ISDIR(ip->i_di.di_mode)) {
-		tmp->i_op = &gfs2_dir_iops;
-		tmp->i_fop = &gfs2_dir_fops;
-	} else if (S_ISLNK(ip->i_di.di_mode)) {
-		tmp->i_op = &gfs2_symlink_iops;
-	} else {
-		tmp->i_op = &gfs2_dev_iops;
-		init_special_inode(tmp, tmp->i_mode, tmp->i_rdev);
-	}
-
-	tmp->u.generic_ip = NULL;
-
-	for (;;) {
-		spin_lock(&ip->i_spin);
-		if (!ip->i_vnode)
-			break;
-		inode = igrab(ip->i_vnode);
-		spin_unlock(&ip->i_spin);
+	struct inode *inode = gfs2_iget(sb, inum);
+	struct gfs2_inode *ip = GFS2_I(inode);
+	struct gfs2_glock *io_gl;
+	int error;
 
-		if (inode) {
-			iput(tmp);
-			return inode;
+	if (inode->i_state & I_NEW) {
+		struct gfs2_sbd *sdp = GFS2_SB(inode);
+		umode_t mode = DT2IF(type);
+		inode->u.generic_ip = ip;
+		inode->i_mode = mode;
+
+		if (S_ISREG(mode)) {
+			inode->i_op = &gfs2_file_iops;
+			inode->i_fop = &gfs2_file_fops;
+			inode->i_mapping->a_ops = &gfs2_file_aops;
+		} else if (S_ISDIR(mode)) {
+			inode->i_op = &gfs2_dir_iops;
+			inode->i_fop = &gfs2_dir_fops;
+		} else if (S_ISLNK(mode)) {
+			inode->i_op = &gfs2_symlink_iops;
+		} else {
+			inode->i_op = &gfs2_dev_iops;
 		}
-		yield();
-	}
 
-	inode = tmp;
+		error = gfs2_glock_get(sdp, inum->no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl);
+		if (unlikely(error))
+			goto fail;
+		ip->i_gl->gl_object = ip;
 
-	gfs2_inode_hold(ip);
-	ip->i_vnode = inode;
-	inode->u.generic_ip = ip;
+		error = gfs2_glock_get(sdp, inum->no_addr, &gfs2_iopen_glops, CREATE, &io_gl);
+		if (unlikely(error))
+			goto fail_put;
 
-	spin_unlock(&ip->i_spin);
+		ip->i_vn = ip->i_gl->gl_vn - 1;
+		error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh);
+		if (unlikely(error))
+			goto fail_iopen;
 
-	insert_inode_hash(inode);
+		gfs2_glock_put(io_gl);
+		unlock_new_inode(inode);
+	}
 
 	return inode;
-}
-
-static int iget_test(struct inode *inode, void *opaque)
-{
-	struct gfs2_inode *ip = inode->u.generic_ip;
-	struct gfs2_inum *inum = (struct gfs2_inum *)opaque;
-
-	if (ip && ip->i_num.no_addr == inum->no_addr)
-		return 1;
-
-	return 0;
-}
-
-struct inode *gfs2_iget(struct super_block *sb, struct gfs2_inum *inum)
-{
-	return ilookup5(sb, (unsigned long)inum->no_formal_ino,
-			iget_test, inum);
-}
-
-void gfs2_inode_min_init(struct gfs2_inode *ip, unsigned int type)
-{
-	if (!test_and_set_bit(GIF_MIN_INIT, &ip->i_flags)) {
-		ip->i_di.di_nlink = 1;
-		ip->i_di.di_mode = DT2IF(type);
-	}
+fail_iopen:
+	gfs2_glock_put(io_gl);
+fail_put:
+	ip->i_gl->gl_object = NULL;
+	gfs2_glock_put(ip->i_gl);
+fail:
+	iput(inode);
+	return ERR_PTR(error);
 }
 
 /**
@@ -250,7 +230,7 @@ int gfs2_inode_refresh(struct gfs2_inode *ip)
 	if (error)
 		return error;
 
-	if (gfs2_metatype_check(ip->i_sbd, dibh, GFS2_METATYPE_DI)) {
+	if (gfs2_metatype_check(GFS2_SB(&ip->i_inode), dibh, GFS2_METATYPE_DI)) {
 		brelse(dibh);
 		return -EIO;
 	}
@@ -273,151 +253,9 @@ int gfs2_inode_refresh(struct gfs2_inode *ip)
 	return 0;
 }
 
-/**
- * inode_create - create a struct gfs2_inode
- * @i_gl: The glock covering the inode
- * @inum: The inode number
- * @io_gl: the iopen glock to acquire/hold (using holder in new gfs2_inode)
- * @io_state: the state the iopen glock should be acquired in
- * @ipp: pointer to put the returned inode in
- *
- * Returns: errno
- */
-
-static int inode_create(struct gfs2_glock *i_gl, const struct gfs2_inum *inum,
-			struct gfs2_glock *io_gl, unsigned int io_state,
-			struct gfs2_inode **ipp, int need_lock)
+int gfs2_dinode_dealloc(struct gfs2_inode *ip)
 {
-	struct gfs2_sbd *sdp = i_gl->gl_sbd;
-	struct gfs2_inode *ip;
-	int error = 0;
-
-	ip = kmem_cache_alloc(gfs2_inode_cachep, GFP_KERNEL);
-	if (!ip)
-		return -ENOMEM;
-	memset(ip, 0, sizeof(struct gfs2_inode));
-	ip->i_num = *inum;
-	atomic_set(&ip->i_count, 1);
-	ip->i_vn = i_gl->gl_vn - 1;
-	ip->i_gl = i_gl;
-	ip->i_sbd = sdp;
-	spin_lock_init(&ip->i_spin);
-	init_rwsem(&ip->i_rw_mutex);
-	ip->i_greedy = gfs2_tune_get(sdp, gt_greedy_default);
-
-	if (need_lock) {
-		error = gfs2_glock_nq_init(io_gl,
-					   io_state, GL_LOCAL_EXCL | GL_EXACT,
-					   &ip->i_iopen_gh);
-		if (error)
-			goto fail;
-
-		spin_lock(&io_gl->gl_spin);
-		gfs2_glock_hold(i_gl);
-		io_gl->gl_object = i_gl;
-		spin_unlock(&io_gl->gl_spin);
-	}
-
-	gfs2_glock_hold(i_gl);
-	i_gl->gl_object = ip;
-	atomic_inc(&sdp->sd_inode_count);
-	*ipp = ip;
-	return 0;
-
-fail:
-	gfs2_meta_cache_flush(ip);
-	kmem_cache_free(gfs2_inode_cachep, ip);
-	*ipp = NULL;
-	return error;
-}
-
-/**
- * gfs2_inode_get - Create or get a reference on an inode
- * @i_gl: The glock covering the inode
- * @inum: The inode number
- * @create:
- * @ipp: pointer to put the returned inode in
- *
- * Returns: errno
- */
-
-int gfs2_inode_get(struct gfs2_glock *i_gl, const struct gfs2_inum *inum,
-		   int create, struct gfs2_inode **ipp)
-{
-	struct gfs2_sbd *sdp = i_gl->gl_sbd;
-	struct gfs2_glock *io_gl;
-	int error = 0;
-
-	gfs2_glmutex_lock(i_gl);
-
-	*ipp = i_gl->gl_object;
-	if (*ipp) {
-		error = -ESTALE;
-		if ((*ipp)->i_num.no_formal_ino != inum->no_formal_ino)
-			goto out;
-		atomic_inc(&(*ipp)->i_count);
-		error = 0;
-		goto out;
-	}
-
-	if (!create)
-		goto out;
-
-	error = gfs2_glock_get(sdp, inum->no_addr, &gfs2_iopen_glops,
-			       CREATE, &io_gl);
-	if (!error) {
-		error = inode_create(i_gl, inum, io_gl, LM_ST_SHARED, ipp, 1);
-		gfs2_glock_put(io_gl);
-	}
-
- out:
-	gfs2_glmutex_unlock(i_gl);
-
-	return error;
-}
-
-void gfs2_inode_hold(struct gfs2_inode *ip)
-{
-	gfs2_assert(ip->i_sbd, atomic_read(&ip->i_count) > 0);
-	atomic_inc(&ip->i_count);
-}
-
-void gfs2_inode_put(struct gfs2_inode *ip)
-{
-	gfs2_assert(ip->i_sbd, atomic_read(&ip->i_count) > 0);
-	atomic_dec(&ip->i_count);
-}
-
-void gfs2_inode_destroy(struct gfs2_inode *ip, int unlock)
-{
-	struct gfs2_sbd *sdp = ip->i_sbd;
-	struct gfs2_glock *i_gl = ip->i_gl;
-
-	gfs2_assert_warn(sdp, !atomic_read(&ip->i_count));
-	if (unlock) {
-		struct gfs2_glock *io_gl = ip->i_iopen_gh.gh_gl;
-		gfs2_assert(sdp, io_gl->gl_object == i_gl);
-	
-		spin_lock(&io_gl->gl_spin);
-		io_gl->gl_object = NULL;
-		spin_unlock(&io_gl->gl_spin);
-		gfs2_glock_put(i_gl);
-	
-		gfs2_glock_dq_uninit(&ip->i_iopen_gh);
-	}
-
-	gfs2_meta_cache_flush(ip);
-	kmem_cache_free(gfs2_inode_cachep, ip);
-
-	i_gl->gl_object = NULL;
-	gfs2_glock_put(i_gl);
-
-	atomic_dec(&sdp->sd_inode_count);
-}
-
-static int dinode_dealloc(struct gfs2_inode *ip, struct gfs2_unlinked *ul)
-{
-	struct gfs2_sbd *sdp = ip->i_sbd;
+	struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
 	struct gfs2_alloc *al;
 	struct gfs2_rgrpd *rgd;
 	int error;
@@ -450,7 +288,7 @@ static int dinode_dealloc(struct gfs2_inode *ip, struct gfs2_unlinked *ul)
 	if (error)
 		goto out_rindex_relse;
 
-	error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_UNLINKED +
+	error = gfs2_trans_begin(sdp, RES_RG_BIT + 
 				 RES_STATFS + RES_QUOTA, 1);
 	if (error)
 		goto out_rg_gunlock;
@@ -459,191 +297,20 @@ static int dinode_dealloc(struct gfs2_inode *ip, struct gfs2_unlinked *ul)
 
 	gfs2_free_di(rgd, ip);
 
-	error = gfs2_unlinked_ondisk_rm(sdp, ul);
-
 	gfs2_trans_end(sdp);
 	clear_bit(GLF_STICKY, &ip->i_gl->gl_flags);
 
- out_rg_gunlock:
+out_rg_gunlock:
 	gfs2_glock_dq_uninit(&al->al_rgd_gh);
-
- out_rindex_relse:
+out_rindex_relse:
 	gfs2_glock_dq_uninit(&al->al_ri_gh);
-
- out_qs:
+out_qs:
 	gfs2_quota_unhold(ip);
-
- out:
-	gfs2_alloc_put(ip);
-
-	return error;
-}
-
-/**
- * inode_dealloc - Deallocate all on-disk blocks for an inode (dinode)
- * @sdp: the filesystem
- * @inum: the inode number to deallocate
- * @io_gh: a holder for the iopen glock for this inode
- *
- * N.B. When we enter this we already hold the iopen glock and getting
- * the glock for the inode means that we are grabbing the locks in the
- * "wrong" order so we must only so a try lock operation and fail if we
- * don't get the lock. Thats ok, since if we fail it means someone else
- * is using the inode still and thus we shouldn't be deallocating it
- * anyway.
- *
- * Returns: errno
- */
-
-static int inode_dealloc(struct gfs2_sbd *sdp, struct gfs2_unlinked *ul,
-			 struct gfs2_holder *io_gh)
-{
-	struct gfs2_inode *ip;
-	struct gfs2_holder i_gh;
-	int error;
-
-	error = gfs2_glock_nq_num(sdp, ul->ul_ut.ut_inum.no_addr,
-				  &gfs2_inode_glops, LM_ST_EXCLUSIVE,
-				  LM_FLAG_TRY_1CB|GL_DUMP, &i_gh);
-	switch(error) {
-	case 0:
-		break;
-	case GLR_TRYFAILED:
-		return 1; /* or back off and relock in different order? */
-	default:
-		return error;
-	}
-
-	gfs2_assert_warn(sdp, !i_gh.gh_gl->gl_object);
-	error = inode_create(i_gh.gh_gl, &ul->ul_ut.ut_inum, io_gh->gh_gl,
-			     LM_ST_EXCLUSIVE, &ip, 0);
-
-	if (error)
-		goto out;
-
-	error = gfs2_inode_refresh(ip);
-	if (error)
-		goto out_iput;
-
-	if (ip->i_di.di_nlink) {
-		if (gfs2_consist_inode(ip))
-			gfs2_dinode_print(&ip->i_di);
-		error = -EIO;
-		goto out_iput;
-	}
-
-	if (S_ISDIR(ip->i_di.di_mode) &&
-	    (ip->i_di.di_flags & GFS2_DIF_EXHASH)) {
-		error = gfs2_dir_exhash_dealloc(ip);
-		if (error)
-			goto out_iput;
-	}
-
-	if (ip->i_di.di_eattr) {
-		error = gfs2_ea_dealloc(ip);
-		if (error)
-			goto out_iput;
-	}
-
-	if (!gfs2_is_stuffed(ip)) {
-		error = gfs2_file_dealloc(ip);
-		if (error)
-			goto out_iput;
-	}
-
-	error = dinode_dealloc(ip, ul);
-	if (error)
-		goto out_iput;
-
-out_iput:
-	gfs2_glmutex_lock(i_gh.gh_gl);
-	gfs2_inode_put(ip);
-	gfs2_inode_destroy(ip, 0);
-	gfs2_glmutex_unlock(i_gh.gh_gl);
-
 out:
-	gfs2_glock_dq_uninit(&i_gh);
-
-	return error;
-}
-
-/**
- * try_inode_dealloc - Try to deallocate an inode and all its blocks
- * @sdp: the filesystem
- *
- * Returns: 0 on success, -errno on error, 1 on busy (inode open)
- */
-
-static int try_inode_dealloc(struct gfs2_sbd *sdp, struct gfs2_unlinked *ul)
-{
-	int error = 0;
-	struct gfs2_holder iogh;
-
-	gfs2_try_toss_inode(sdp, &ul->ul_ut.ut_inum);
-	error = gfs2_glock_nq_num(sdp, ul->ul_ut.ut_inum.no_addr,
-				  &gfs2_iopen_glops, LM_ST_EXCLUSIVE,
-				  LM_FLAG_TRY_1CB, &iogh);
-	switch (error) {
-	case 0:
-		break;
-	case GLR_TRYFAILED:
-		return 1;
-	default:
-		return error;
-	}
-
-	error = inode_dealloc(sdp, ul, &iogh);
-	gfs2_glock_dq_uninit(&iogh);
-
-	return error;
-}
-
-static int inode_dealloc_uninit(struct gfs2_sbd *sdp, struct gfs2_unlinked *ul)
-{
-	struct gfs2_rgrpd *rgd;
-	struct gfs2_holder ri_gh, rgd_gh;
-	int error;
-
-	error = gfs2_rindex_hold(sdp, &ri_gh);
-	if (error)
-		return error;
-
-	rgd = gfs2_blk2rgrpd(sdp, ul->ul_ut.ut_inum.no_addr);
-	if (!rgd) {
-		gfs2_consist(sdp);
-		error = -EIO;
-		goto out;
-	}
-
-	error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, &rgd_gh);
-	if (error)
-		goto out;
-
-	error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_UNLINKED + RES_STATFS, 0);
-	if (error)
-		goto out_gunlock;
-
-	gfs2_free_uninit_di(rgd, ul->ul_ut.ut_inum.no_addr);
-	gfs2_unlinked_ondisk_rm(sdp, ul);
-
-	gfs2_trans_end(sdp);
-
- out_gunlock:
-	gfs2_glock_dq_uninit(&rgd_gh);
- out:
-	gfs2_glock_dq_uninit(&ri_gh);
-
+	gfs2_alloc_put(ip);
 	return error;
 }
 
-int gfs2_inode_dealloc(struct gfs2_sbd *sdp, struct gfs2_unlinked *ul)
-{
-	if (ul->ul_ut.ut_flags & GFS2_UTF_UNINIT)
-		return inode_dealloc_uninit(sdp, ul);
-	else
-		return try_inode_dealloc(sdp, ul);
-}
-
 /**
  * gfs2_change_nlink - Change nlink count on inode
  * @ip: The GFS2 inode
@@ -654,6 +321,7 @@ int gfs2_inode_dealloc(struct gfs2_sbd *sdp, struct gfs2_unlinked *ul)
 
 int gfs2_change_nlink(struct gfs2_inode *ip, int diff)
 {
+	struct gfs2_sbd *sdp = ip->i_inode.i_sb->s_fs_info;
 	struct buffer_head *dibh;
 	uint32_t nlink;
 	int error;
@@ -678,8 +346,30 @@ int gfs2_change_nlink(struct gfs2_inode *ip, int diff)
 	gfs2_trans_add_bh(ip->i_gl, dibh, 1);
 	gfs2_dinode_out(&ip->i_di, dibh->b_data);
 	brelse(dibh);
+	mark_inode_dirty(&ip->i_inode);
 
-	return 0;
+	if (ip->i_di.di_nlink == 0) {
+		struct gfs2_rgrpd *rgd;
+		struct gfs2_holder ri_gh, rg_gh;
+
+		error = gfs2_rindex_hold(sdp, &ri_gh);
+		if (error)
+			goto out;
+		error = -EIO;
+		rgd = gfs2_blk2rgrpd(sdp, ip->i_num.no_addr);
+		if (!rgd)
+			goto out_norgrp;
+		error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, &rg_gh);
+		if (error)
+			goto out_norgrp;
+
+		gfs2_unlink_di(&ip->i_inode); /* mark inode unlinked */
+		gfs2_glock_dq_uninit(&rg_gh);
+out_norgrp:
+		gfs2_glock_dq_uninit(&ri_gh);
+	}
+out:
+	return error;
 }
 
 struct inode *gfs2_lookup_simple(struct inode *dip, const char *name)
@@ -703,18 +393,15 @@ struct inode *gfs2_lookup_simple(struct inode *dip, const char *name)
  * Returns: errno
  */
 
-struct inode *gfs2_lookupi(struct inode *dir, struct qstr *name, int is_root,
-			   struct nameidata *nd)
+struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name,
+			   int is_root, struct nameidata *nd)
 		 
 {
 	struct super_block *sb = dir->i_sb;
-	struct gfs2_inode *ipp;
-	struct gfs2_inode *dip = dir->u.generic_ip;
-	struct gfs2_sbd *sdp = dip->i_sbd;
+	struct gfs2_inode *dip = GFS2_I(dir);
 	struct gfs2_holder d_gh;
 	struct gfs2_inum inum;
 	unsigned int type;
-	struct gfs2_glock *gl;
 	int error = 0;
 	struct inode *inode = NULL;
 
@@ -742,34 +429,18 @@ struct inode *gfs2_lookupi(struct inode *dir, struct qstr *name, int is_root,
 	if (error)
 		goto out;
 
-	error = gfs2_glock_get(sdp, inum.no_addr, &gfs2_inode_glops,
-			       CREATE, &gl);
-	if (error)
-		goto out;
-
-	error = gfs2_inode_get(gl, &inum, CREATE, &ipp);
-	if (!error)
-		gfs2_inode_min_init(ipp, type);
-
-	gfs2_glock_put(gl);
+	inode = gfs2_inode_lookup(sb, &inum, type);
 
 out:
 	gfs2_glock_dq_uninit(&d_gh);
 	if (error == -ENOENT)
 		return NULL;
-	if (error == 0) {
-		inode = gfs2_ip2v(ipp);
-		gfs2_inode_put(ipp);
-		if (!inode)
-			return ERR_PTR(-ENOMEM);
-		return inode;
-	}
-	return ERR_PTR(error);
+	return inode;
 }
 
 static int pick_formal_ino_1(struct gfs2_sbd *sdp, uint64_t *formal_ino)
 {
-	struct gfs2_inode *ip = sdp->sd_ir_inode->u.generic_ip;
+	struct gfs2_inode *ip = GFS2_I(sdp->sd_ir_inode);
 	struct buffer_head *bh;
 	struct gfs2_inum_range ir;
 	int error;
@@ -810,8 +481,8 @@ static int pick_formal_ino_1(struct gfs2_sbd *sdp, uint64_t *formal_ino)
 
 static int pick_formal_ino_2(struct gfs2_sbd *sdp, uint64_t *formal_ino)
 {
-	struct gfs2_inode *ip = sdp->sd_ir_inode->u.generic_ip;
-	struct gfs2_inode *m_ip = sdp->sd_inum_inode->u.generic_ip;
+	struct gfs2_inode *ip = GFS2_I(sdp->sd_ir_inode);
+	struct gfs2_inode *m_ip = GFS2_I(sdp->sd_inum_inode);
 	struct gfs2_holder gh;
 	struct buffer_head *bh;
 	struct gfs2_inum_range ir;
@@ -895,12 +566,12 @@ static int pick_formal_ino(struct gfs2_sbd *sdp, uint64_t *inum)
  * Returns: errno
  */
 
-static int create_ok(struct gfs2_inode *dip, struct qstr *name,
+static int create_ok(struct gfs2_inode *dip, const struct qstr *name,
 		     unsigned int mode)
 {
 	int error;
 
-	error = gfs2_repermission(dip->i_vnode, MAY_WRITE | MAY_EXEC, NULL);
+	error = gfs2_repermission(&dip->i_inode, MAY_WRITE | MAY_EXEC, NULL);
 	if (error)
 		return error;
 
@@ -908,7 +579,7 @@ static int create_ok(struct gfs2_inode *dip, struct qstr *name,
 	if (!dip->i_di.di_nlink)
 		return -EPERM;
 
-	error = gfs2_dir_search(dip->i_vnode, name, NULL, NULL);
+	error = gfs2_dir_search(&dip->i_inode, name, NULL, NULL);
 	switch (error) {
 	case -ENOENT:
 		error = 0;
@@ -930,7 +601,7 @@ static int create_ok(struct gfs2_inode *dip, struct qstr *name,
 static void munge_mode_uid_gid(struct gfs2_inode *dip, unsigned int *mode,
 			       unsigned int *uid, unsigned int *gid)
 {
-	if (dip->i_sbd->sd_args.ar_suiddir &&
+	if (GFS2_SB(&dip->i_inode)->sd_args.ar_suiddir &&
 	    (dip->i_di.di_mode & S_ISUID) &&
 	    dip->i_di.di_uid) {
 		if (S_ISDIR(*mode))
@@ -949,9 +620,9 @@ static void munge_mode_uid_gid(struct gfs2_inode *dip, unsigned int *mode,
 		*gid = current->fsgid;
 }
 
-static int alloc_dinode(struct gfs2_inode *dip, struct gfs2_unlinked *ul)
+static int alloc_dinode(struct gfs2_inode *dip, struct gfs2_inum *inum)
 {
-	struct gfs2_sbd *sdp = dip->i_sbd;
+	struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
 	int error;
 
 	gfs2_alloc_get(dip);
@@ -961,15 +632,11 @@ static int alloc_dinode(struct gfs2_inode *dip, struct gfs2_unlinked *ul)
 	if (error)
 		goto out;
 
-	error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_UNLINKED +
-				 RES_STATFS, 0);
+	error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_STATFS, 0);
 	if (error)
 		goto out_ipreserv;
 
-	ul->ul_ut.ut_inum.no_addr = gfs2_alloc_di(dip);
-
-	ul->ul_ut.ut_flags = GFS2_UTF_UNINIT;
-	error = gfs2_unlinked_ondisk_add(sdp, ul);
+	inum->no_addr = gfs2_alloc_di(dip);
 
 	gfs2_trans_end(sdp);
 
@@ -997,7 +664,7 @@ static void init_dinode(struct gfs2_inode *dip, struct gfs2_glock *gl,
 			struct gfs2_inum *inum, unsigned int mode,
 			unsigned int uid, unsigned int gid)
 {
-	struct gfs2_sbd *sdp = dip->i_sbd;
+	struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
 	struct gfs2_dinode *di;
 	struct buffer_head *dibh;
 
@@ -1049,9 +716,9 @@ static void init_dinode(struct gfs2_inode *dip, struct gfs2_glock *gl,
 }
 
 static int make_dinode(struct gfs2_inode *dip, struct gfs2_glock *gl,
-		       unsigned int mode, struct gfs2_unlinked *ul)
+		       unsigned int mode, struct gfs2_inum *inum)
 {
-	struct gfs2_sbd *sdp = dip->i_sbd;
+	struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
 	unsigned int uid, gid;
 	int error;
 
@@ -1066,28 +733,25 @@ static int make_dinode(struct gfs2_inode *dip, struct gfs2_glock *gl,
 	if (error)
 		goto out_quota;
 
-	error = gfs2_trans_begin(sdp, RES_DINODE + RES_UNLINKED + RES_QUOTA, 0);
+	error = gfs2_trans_begin(sdp, RES_DINODE + RES_QUOTA, 0);
 	if (error)
 		goto out_quota;
 
-	ul->ul_ut.ut_flags = 0;
-	error = gfs2_unlinked_ondisk_munge(sdp, ul);
-	init_dinode(dip, gl, &ul->ul_ut.ut_inum, mode, uid, gid);
+	init_dinode(dip, gl, inum, mode, uid, gid);
 	gfs2_quota_change(dip, +1, uid, gid);
 	gfs2_trans_end(sdp);
 
- out_quota:
+out_quota:
 	gfs2_quota_unlock(dip);
-
- out:
+out:
 	gfs2_alloc_put(dip);
 	return error;
 }
 
-static int link_dinode(struct gfs2_inode *dip, struct qstr *name,
-		       struct gfs2_inode *ip, struct gfs2_unlinked *ul)
+static int link_dinode(struct gfs2_inode *dip, const struct qstr *name,
+		       struct gfs2_inode *ip)
 {
-	struct gfs2_sbd *sdp = dip->i_sbd;
+	struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
 	struct gfs2_alloc *al;
 	int alloc_required;
 	struct buffer_head *dibh;
@@ -1099,7 +763,7 @@ static int link_dinode(struct gfs2_inode *dip, struct qstr *name,
 	if (error)
 		goto fail;
 
-	error = alloc_required = gfs2_diradd_alloc_required(dip->i_vnode, name);
+	error = alloc_required = gfs2_diradd_alloc_required(&dip->i_inode, name);
 	if (alloc_required < 0)
 		goto fail;
 	if (alloc_required) {
@@ -1116,20 +780,17 @@ static int link_dinode(struct gfs2_inode *dip, struct qstr *name,
 
 		error = gfs2_trans_begin(sdp, sdp->sd_max_dirres +
 					 al->al_rgd->rd_ri.ri_length +
-					 2 * RES_DINODE + RES_UNLINKED +
+					 2 * RES_DINODE + 
 					 RES_STATFS + RES_QUOTA, 0);
 		if (error)
 			goto fail_ipreserv;
 	} else {
-		error = gfs2_trans_begin(sdp,
-					 RES_LEAF +
-					 2 * RES_DINODE +
-					 RES_UNLINKED, 0);
+		error = gfs2_trans_begin(sdp, RES_LEAF + 2 * RES_DINODE, 0);
 		if (error)
 			goto fail_quota_locks;
 	}
 
-	error = gfs2_dir_add(dip->i_vnode, name, &ip->i_num, IF2DT(ip->i_di.di_mode));
+	error = gfs2_dir_add(&dip->i_inode, name, &ip->i_num, IF2DT(ip->i_di.di_mode));
 	if (error)
 		goto fail_end_trans;
 
@@ -1140,11 +801,6 @@ static int link_dinode(struct gfs2_inode *dip, struct qstr *name,
 	gfs2_trans_add_bh(ip->i_gl, dibh, 1);
 	gfs2_dinode_out(&ip->i_di, dibh->b_data);
 	brelse(dibh);
-
-	error = gfs2_unlinked_ondisk_rm(sdp, ul);
-	if (error)
-		goto fail_end_trans;
-
 	return 0;
 
 fail_end_trans:
@@ -1178,23 +834,19 @@ fail:
  * Returns: An inode
  */
 
-struct inode *gfs2_createi(struct gfs2_holder *ghs, struct qstr *name,
+struct inode *gfs2_createi(struct gfs2_holder *ghs, const struct qstr *name,
 			   unsigned int mode)
 {
 	struct inode *inode;
 	struct gfs2_inode *dip = ghs->gh_gl->gl_object;
-	struct gfs2_sbd *sdp = dip->i_sbd;
-	struct gfs2_unlinked *ul;
-	struct gfs2_inode *ip;
+	struct inode *dir = &dip->i_inode;
+	struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
+	struct gfs2_inum inum;
 	int error;
 
 	if (!name->len || name->len > GFS2_FNAMESIZE)
 		return ERR_PTR(-ENAMETOOLONG);
 
-	error = gfs2_unlinked_get(sdp, &ul);
-	if (error)
-		return ERR_PTR(error);
-
 	gfs2_holder_reinit(LM_ST_EXCLUSIVE, 0, ghs);
 	error = gfs2_glock_nq(ghs);
 	if (error)
@@ -1204,22 +856,21 @@ struct inode *gfs2_createi(struct gfs2_holder *ghs, struct qstr *name,
 	if (error)
 		goto fail_gunlock;
 
-	error = pick_formal_ino(sdp, &ul->ul_ut.ut_inum.no_formal_ino);
+	error = pick_formal_ino(sdp, &inum.no_formal_ino);
 	if (error)
 		goto fail_gunlock;
 
-	error = alloc_dinode(dip, ul);
+	error = alloc_dinode(dip, &inum);
 	if (error)
 		goto fail_gunlock;
 
-	if (ul->ul_ut.ut_inum.no_addr < dip->i_num.no_addr) {
+	if (inum.no_addr < dip->i_num.no_addr) {
 		gfs2_glock_dq(ghs);
 
-		error = gfs2_glock_nq_num(sdp, ul->ul_ut.ut_inum.no_addr,
+		error = gfs2_glock_nq_num(sdp, inum.no_addr,
 					  &gfs2_inode_glops, LM_ST_EXCLUSIVE,
 					  GL_SKIP, ghs + 1);
 		if (error) {
-			gfs2_unlinked_put(sdp, ul);
 			return ERR_PTR(error);
 		}
 
@@ -1227,7 +878,6 @@ struct inode *gfs2_createi(struct gfs2_holder *ghs, struct qstr *name,
 		error = gfs2_glock_nq(ghs);
 		if (error) {
 			gfs2_glock_dq_uninit(ghs + 1);
-			gfs2_unlinked_put(sdp, ul);
 			return ERR_PTR(error);
 		}
 
@@ -1235,95 +885,48 @@ struct inode *gfs2_createi(struct gfs2_holder *ghs, struct qstr *name,
 		if (error)
 			goto fail_gunlock2;
 	} else {
-		error = gfs2_glock_nq_num(sdp, ul->ul_ut.ut_inum.no_addr,
+		error = gfs2_glock_nq_num(sdp, inum.no_addr,
 					  &gfs2_inode_glops, LM_ST_EXCLUSIVE,
 					  GL_SKIP, ghs + 1);
 		if (error)
 			goto fail_gunlock;
 	}
 
-	error = make_dinode(dip, ghs[1].gh_gl, mode, ul);
+	error = make_dinode(dip, ghs[1].gh_gl, mode, &inum);
 	if (error)
 		goto fail_gunlock2;
 
-	error = gfs2_inode_get(ghs[1].gh_gl, &ul->ul_ut.ut_inum, CREATE, &ip);
-	if (error)
+	inode = gfs2_inode_lookup(dir->i_sb, &inum, IF2DT(mode));
+	if (IS_ERR(inode))
 		goto fail_gunlock2;
 
-	error = gfs2_inode_refresh(ip);
+	error = gfs2_inode_refresh(GFS2_I(inode));
 	if (error)
 		goto fail_iput;
 
-	error = gfs2_acl_create(dip, ip);
+	error = gfs2_acl_create(dip, GFS2_I(inode));
 	if (error)
 		goto fail_iput;
 
-	error = link_dinode(dip, name, ip, ul);
+	error = link_dinode(dip, name, GFS2_I(inode));
 	if (error)
 		goto fail_iput;
 
-	gfs2_unlinked_put(sdp, ul);
-
-	inode = gfs2_ip2v(ip);
-	gfs2_inode_put(ip);
 	if (!inode)
 		return ERR_PTR(-ENOMEM);
 	return inode;
 
 fail_iput:
-	gfs2_inode_put(ip);
-
+	iput(inode);
 fail_gunlock2:
 	gfs2_glock_dq_uninit(ghs + 1);
-
 fail_gunlock:
 	gfs2_glock_dq(ghs);
-
 fail:
-	gfs2_unlinked_put(sdp, ul);
 	return ERR_PTR(error);
 }
 
 /**
- * gfs2_unlinki - Unlink a file
- * @dip: The inode of the directory
- * @name: The name of the file to be unlinked
- * @ip: The inode of the file to be removed
- *
- * Assumes Glocks on both dip and ip are held.
- *
- * Returns: errno
- */
-
-int gfs2_unlinki(struct gfs2_inode *dip, struct qstr *name,
-		 struct gfs2_inode *ip, struct gfs2_unlinked *ul)
-{
-	struct gfs2_sbd *sdp = dip->i_sbd;
-	int error;
-
-	error = gfs2_dir_del(dip, name);
-	if (error)
-		return error;
-
-	error = gfs2_change_nlink(ip, -1);
-	if (error)
-		return error;
-
-	/* If this inode is being unlinked from the directory structure,
-	   we need to mark that in the log so that it isn't lost during
-	   a crash. */
-
-	if (!ip->i_di.di_nlink) {
-		ul->ul_ut.ut_inum = ip->i_num;
-		error = gfs2_unlinked_ondisk_add(sdp, ul);
-		if (!error)
-			set_bit(GLF_STICKY, &ip->i_gl->gl_flags);
-	}
-
-	return error;
-}
-
-/**
  * gfs2_rmdiri - Remove a directory
  * @dip: The parent directory of the directory to be removed
  * @name: The name of the directory to be removed
@@ -1334,10 +937,9 @@ int gfs2_unlinki(struct gfs2_inode *dip, struct qstr *name,
  * Returns: errno
  */
 
-int gfs2_rmdiri(struct gfs2_inode *dip, struct qstr *name,
-		struct gfs2_inode *ip, struct gfs2_unlinked *ul)
+int gfs2_rmdiri(struct gfs2_inode *dip, const struct qstr *name,
+		struct gfs2_inode *ip)
 {
-	struct gfs2_sbd *sdp = dip->i_sbd;
 	struct qstr dotname;
 	int error;
 
@@ -1360,9 +962,7 @@ int gfs2_rmdiri(struct gfs2_inode *dip, struct qstr *name,
 	if (error)
 		return error;
 
-	dotname.len = 2;
-	dotname.name = "..";
-	dotname.hash = gfs2_disk_hash(dotname.name, dotname.len);
+	gfs2_str2qstr(&dotname, "..");
 	error = gfs2_dir_del(ip, &dotname);
 	if (error)
 		return error;
@@ -1371,15 +971,6 @@ int gfs2_rmdiri(struct gfs2_inode *dip, struct qstr *name,
 	if (error)
 		return error;
 
-	/* This inode is being unlinked from the directory structure and
-	   we need to mark that in the log so that it isn't lost during
-	   a crash. */
-
-	ul->ul_ut.ut_inum = ip->i_num;
-	error = gfs2_unlinked_ondisk_add(sdp, ul);
-	if (!error)
-		set_bit(GLF_STICKY, &ip->i_gl->gl_flags);
-
 	return error;
 }
 
@@ -1394,30 +985,29 @@ int gfs2_rmdiri(struct gfs2_inode *dip, struct qstr *name,
  * Returns: 0 if the parent/child relationship is correct, errno if it isn't
  */
 
-int gfs2_unlink_ok(struct gfs2_inode *dip, struct qstr *name,
+int gfs2_unlink_ok(struct gfs2_inode *dip, const struct qstr *name,
 		   struct gfs2_inode *ip)
 {
 	struct gfs2_inum inum;
 	unsigned int type;
 	int error;
 
-	if (IS_IMMUTABLE(ip->i_vnode) || IS_APPEND(ip->i_vnode))
+	if (IS_IMMUTABLE(&ip->i_inode) || IS_APPEND(&ip->i_inode))
 		return -EPERM;
 
 	if ((dip->i_di.di_mode & S_ISVTX) &&
 	    dip->i_di.di_uid != current->fsuid &&
-	    ip->i_di.di_uid != current->fsuid &&
-	    !capable(CAP_FOWNER))
+	    ip->i_di.di_uid != current->fsuid && !capable(CAP_FOWNER))
 		return -EPERM;
 
-	if (IS_APPEND(dip->i_vnode))
+	if (IS_APPEND(&dip->i_inode))
 		return -EPERM;
 
-	error = gfs2_repermission(dip->i_vnode, MAY_WRITE | MAY_EXEC, NULL);
+	error = gfs2_repermission(&dip->i_inode, MAY_WRITE | MAY_EXEC, NULL);
 	if (error)
 		return error;
 
-	error = gfs2_dir_search(dip->i_vnode, name, &inum, &type);
+	error = gfs2_dir_search(&dip->i_inode, name, &inum, &type);
 	if (error)
 		return error;
 
@@ -1445,7 +1035,7 @@ int gfs2_unlink_ok(struct gfs2_inode *dip, struct qstr *name,
 
 int gfs2_ok_to_move(struct gfs2_inode *this, struct gfs2_inode *to)
 {
-	struct inode *dir = to->i_vnode;
+	struct inode *dir = &to->i_inode;
 	struct super_block *sb = dir->i_sb;
 	struct inode *tmp;
 	struct qstr dotdot;
@@ -1456,7 +1046,7 @@ int gfs2_ok_to_move(struct gfs2_inode *this, struct gfs2_inode *to)
 	igrab(dir);
 
 	for (;;) {
-		if (dir == this->i_vnode) {
+		if (dir == &this->i_inode) {
 			error = -EINVAL;
 			break;
 		}
@@ -1528,12 +1118,10 @@ int gfs2_readlinki(struct gfs2_inode *ip, char **buf, unsigned int *len)
 	memcpy(*buf, dibh->b_data + sizeof(struct gfs2_dinode), x);
 	*len = x;
 
- out_brelse:
+out_brelse:
 	brelse(dibh);
-
- out:
+out:
 	gfs2_glock_dq_uninit(&i_gh);
-
 	return error;
 }
 
@@ -1622,12 +1210,10 @@ int gfs2_glock_nq_atime(struct gfs2_holder *gh)
 
 	return 0;
 
- fail_end_trans:
+fail_end_trans:
 	gfs2_trans_end(sdp);
-
- fail:
+fail:
 	gfs2_glock_dq(gh);
-
 	return error;
 }
 
@@ -1722,49 +1308,6 @@ int gfs2_glock_nq_m_atime(unsigned int num_gh, struct gfs2_holder *ghs)
 	return error;
 }
 
-/**
- * gfs2_try_toss_vnode - See if we can toss a vnode from memory
- * @ip: the inode
- *
- * Returns:  1 if the vnode was tossed
- */
-
-void gfs2_try_toss_vnode(struct gfs2_inode *ip)
-{
-	struct inode *inode;
-
-	inode = gfs2_ip2v_lookup(ip);
-	if (!inode)
-		return;
-
-	d_prune_aliases(inode);
-
-	if (S_ISDIR(ip->i_di.di_mode)) {
-		struct list_head *head = &inode->i_dentry;
-		struct dentry *d = NULL;
-
-		spin_lock(&dcache_lock);
-		if (list_empty(head))
-			spin_unlock(&dcache_lock);
-		else {
-			d = list_entry(head->next, struct dentry, d_alias);
-			dget_locked(d);
-			spin_unlock(&dcache_lock);
-
-			if (have_submounts(d))
-				dput(d);
-			else {
-				shrink_dcache_parent(d);
-				dput(d);
-				d_prune_aliases(inode);
-			}
-		}
-	}
-
-	inode->i_nlink = 0;
-	iput(inode);
-}
-
 
 static int
 __gfs2_setattr_simple(struct gfs2_inode *ip, struct iattr *attr)
@@ -1774,8 +1317,8 @@ __gfs2_setattr_simple(struct gfs2_inode *ip, struct iattr *attr)
 
 	error = gfs2_meta_inode_buffer(ip, &dibh);
 	if (!error) {
-		error = inode_setattr(ip->i_vnode, attr);
-		gfs2_assert_warn(ip->i_sbd, !error);
+		error = inode_setattr(&ip->i_inode, attr);
+		gfs2_assert_warn(GFS2_SB(&ip->i_inode), !error);
 		gfs2_inode_attr_out(ip);
 
 		gfs2_trans_add_bh(ip->i_gl, dibh, 1);
@@ -1802,13 +1345,13 @@ int gfs2_setattr_simple(struct gfs2_inode *ip, struct iattr *attr)
 	if (current->journal_info)
 		return __gfs2_setattr_simple(ip, attr);
 
-	error = gfs2_trans_begin(ip->i_sbd, RES_DINODE, 0);
+	error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), RES_DINODE, 0);
 	if (error)
 		return error;
 
 	error = __gfs2_setattr_simple(ip, attr);
 
-	gfs2_trans_end(ip->i_sbd);
+	gfs2_trans_end(GFS2_SB(&ip->i_inode));
 
 	return error;
 }