[PATCH 25/39] ocfs2: Make 'private' into 'object' on ocfs2_extent_tree.

Mark Fasheh
2008-09-24T22:14:36Z

From: Joel Becker <joel.becker@oracle.com>

The 'private' pointer was a way to store off xattr values, which don't
live at a set place in the bh. But the concept of "the object
containing the extent tree" is much more generic. For an inode it's the
struct ocfs2_dinode, for an xattr value its the value. Let's save off
the 'object' at all times. If NULL is passed to
ocfs2_get_extent_tree(), 'object' is set to bh->b_data;

Signed-off-by: Joel Becker <joel.becker@oracle.com>
Signed-off-by: Mark Fasheh <mfasheh@suse.com>
---
fs/ocfs2/alloc.c | 62 +++++++++++++++++++++++++----------------------------
1 files changed, 29 insertions(+), 33 deletions(-)

diff --git a/fs/ocfs2/alloc.c b/fs/ocfs2/alloc.c
index 0abf11e..93f44f4 100644
--- a/fs/ocfs2/alloc.c
+++ b/fs/ocfs2/alloc.c
@@ -79,15 +79,14 @@ struct ocfs2_extent_tree {
struct ocfs2_extent_tree_operations *et_ops;
struct buffer_head *et_root_bh;
struct ocfs2_extent_list *et_root_el;
- void *et_private;
+ void *et_object;
unsigned int et_max_leaf_clusters;
};

static void ocfs2_dinode_set_last_eb_blk(struct ocfs2_extent_tree *et,
u64 blkno)
{
- struct ocfs2_dinode *di =
- (struct ocfs2_dinode *)et->et_root_bh->b_data;
+ struct ocfs2_dinode *di = et->et_object;

BUG_ON(et->et_type != OCFS2_DINODE_EXTENT);
di->i_last_eb_blk = cpu_to_le64(blkno);
@@ -95,8 +94,7 @@ static void ocfs2_dinode_set_last_eb_blk(struct ocfs2_extent_tree *et,

static u64 ocfs2_dinode_get_last_eb_blk(struct ocfs2_extent_tree *et)
{
- struct ocfs2_dinode *di =
- (struct ocfs2_dinode *)et->et_root_bh->b_data;
+ struct ocfs2_dinode *di = et->et_object;

BUG_ON(et->et_type != OCFS2_DINODE_EXTENT);
return le64_to_cpu(di->i_last_eb_blk);
@@ -106,8 +104,7 @@ static void ocfs2_dinode_update_clusters(struct inode *inode,
struct ocfs2_extent_tree *et,
u32 clusters)
{
- struct ocfs2_dinode *di =
- (struct ocfs2_dinode *)et->et_root_bh->b_data;
+ struct ocfs2_dinode *di = et->et_object;

le32_add_cpu(&di->i_clusters, clusters);
spin_lock(&OCFS2_I(inode)->ip_lock);
@@ -123,7 +120,7 @@ static int ocfs2_dinode_sanity_check(struct inode *inode,

BUG_ON(et->et_type != OCFS2_DINODE_EXTENT);

- di = (struct ocfs2_dinode *)et->et_root_bh->b_data;
+ di = et->et_object;
if (!OCFS2_IS_VALID_DINODE(di)) {
ret = -EIO;
ocfs2_error(inode->i_sb,
@@ -145,7 +142,7 @@ static void ocfs2_xattr_value_set_last_eb_blk(struct ocfs2_extent_tree *et,
u64 blkno)
{
struct ocfs2_xattr_value_root *xv =
- (struct ocfs2_xattr_value_root *)et->et_private;
+ (struct ocfs2_xattr_value_root *)et->et_object;

xv->xr_last_eb_blk = cpu_to_le64(blkno);
}
@@ -153,7 +150,7 @@ static void ocfs2_xattr_value_set_last_eb_blk(struct ocfs2_extent_tree *et,
static u64 ocfs2_xattr_value_get_last_eb_blk(struct ocfs2_extent_tree *et)
{
struct ocfs2_xattr_value_root *xv =
- (struct ocfs2_xattr_value_root *) et->et_private;
+ (struct ocfs2_xattr_value_root *) et->et_object;

return le64_to_cpu(xv->xr_last_eb_blk);
}
@@ -163,7 +160,7 @@ static void ocfs2_xattr_value_update_clusters(struct inode *inode,
u32 clusters)
{
struct ocfs2_xattr_value_root *xv =
- (struct ocfs2_xattr_value_root *)et->et_private;
+ (struct ocfs2_xattr_value_root *)et->et_object;

le32_add_cpu(&xv->xr_clusters, clusters);
}
@@ -184,8 +181,7 @@ static struct ocfs2_extent_tree_operations ocfs2_xattr_et_ops = {
static void ocfs2_xattr_tree_set_last_eb_blk(struct ocfs2_extent_tree *et,
u64 blkno)
{
- struct ocfs2_xattr_block *xb =
- (struct ocfs2_xattr_block *) et->et_root_bh->b_data;
+ struct ocfs2_xattr_block *xb = et->et_object;
struct ocfs2_xattr_tree_root *xt = &xb->xb_attrs.xb_root;

xt->xt_last_eb_blk = cpu_to_le64(blkno);
@@ -193,8 +189,7 @@ static void ocfs2_xattr_tree_set_last_eb_blk(struct ocfs2_extent_tree *et,

static u64 ocfs2_xattr_tree_get_last_eb_blk(struct ocfs2_extent_tree *et)
{
- struct ocfs2_xattr_block *xb =
- (struct ocfs2_xattr_block *) et->et_root_bh->b_data;
+ struct ocfs2_xattr_block *xb = et->et_object;
struct ocfs2_xattr_tree_root *xt = &xb->xb_attrs.xb_root;

return le64_to_cpu(xt->xt_last_eb_blk);
@@ -204,8 +199,7 @@ static void ocfs2_xattr_tree_update_clusters(struct inode *inode,
struct ocfs2_extent_tree *et,
u32 clusters)
{
- struct ocfs2_xattr_block *xb =
- (struct ocfs2_xattr_block *)et->et_root_bh->b_data;
+ struct ocfs2_xattr_block *xb = et->et_object;

le32_add_cpu(&xb->xb_attrs.xb_root.xt_clusters, clusters);
}
@@ -227,26 +221,28 @@ static void ocfs2_get_extent_tree(struct ocfs2_extent_tree *et,
struct inode *inode,
struct buffer_head *bh,
enum ocfs2_extent_tree_type et_type,
- void *private)
+ void *obj)
{
et->et_type = et_type;
get_bh(bh);
et->et_root_bh = bh;
- et->et_private = private;
et->et_max_leaf_clusters = 0;
+ if (!obj)
+ obj = (void *)bh->b_data;
+ et->et_object = obj;

if (et_type == OCFS2_DINODE_EXTENT) {
et->et_root_el =
- &((struct ocfs2_dinode *)bh->b_data)->id2.i_list;
+ &((struct ocfs2_dinode *)obj)->id2.i_list;
et->et_ops = &ocfs2_dinode_et_ops;
} else if (et_type == OCFS2_XATTR_VALUE_EXTENT) {
struct ocfs2_xattr_value_root *xv =
- (struct ocfs2_xattr_value_root *) private;
+ (struct ocfs2_xattr_value_root *)obj;
et->et_root_el = &xv->xr_list;
et->et_ops = &ocfs2_xattr_et_ops;
} else if (et_type == OCFS2_XATTR_TREE_EXTENT) {
struct ocfs2_xattr_block *xb =
- (struct ocfs2_xattr_block *)bh->b_data;
+ (struct ocfs2_xattr_block *)obj;
et->et_root_el = &xb->xb_attrs.xb_root.xt_list;
et->et_ops = &ocfs2_xattr_tree_et_ops;
et->et_max_leaf_clusters = ocfs2_clusters_for_bytes(inode->i_sb,
@@ -593,7 +589,7 @@ int ocfs2_num_free_extents(struct ocfs2_super *osb,
struct inode *inode,
struct buffer_head *root_bh,
enum ocfs2_extent_tree_type type,
- void *private)
+ void *obj)
{
int retval;
struct ocfs2_extent_list *el = NULL;
@@ -617,7 +613,7 @@ int ocfs2_num_free_extents(struct ocfs2_super *osb,
el = &fe->id2.i_list;
} else if (type == OCFS2_XATTR_VALUE_EXTENT) {
struct ocfs2_xattr_value_root *xv =
- (struct ocfs2_xattr_value_root *) private;
+ (struct ocfs2_xattr_value_root *) obj;

last_eb_blk = le64_to_cpu(xv->xr_last_eb_blk);
el = &xv->xr_list;
@@ -4450,13 +4446,13 @@ int ocfs2_xattr_value_insert_extent(struct ocfs2_super *osb,
u32 new_clusters,
u8 flags,
struct ocfs2_alloc_context *meta_ac,
- void *private)
+ void *obj)
{
int status;
struct ocfs2_extent_tree et;

ocfs2_get_extent_tree(&et, inode, root_bh,
- OCFS2_XATTR_VALUE_EXTENT, private);
+ OCFS2_XATTR_VALUE_EXTENT, obj);
status = ocfs2_insert_extent(osb, handle, inode, root_bh,
cpos, start_blk, new_clusters,
flags, meta_ac, &et);
@@ -4507,7 +4503,7 @@ int ocfs2_add_clusters_in_btree(struct ocfs2_super *osb,
struct ocfs2_alloc_context *meta_ac,
enum ocfs2_alloc_restarted *reason_ret,
enum ocfs2_extent_tree_type type,
- void *private)
+ void *obj)
{
int status = 0;
int free_extents;
@@ -4522,7 +4518,7 @@ int ocfs2_add_clusters_in_btree(struct ocfs2_super *osb,
flags = OCFS2_EXT_UNWRITTEN;

free_extents = ocfs2_num_free_extents(osb, inode, root_bh, type,
- private);
+ obj);
if (free_extents < 0) {
status = free_extents;
mlog_errno(status);
@@ -4584,7 +4580,7 @@ int ocfs2_add_clusters_in_btree(struct ocfs2_super *osb,
inode, root_bh,
*logical_offset,
block, num_bits, flags,
- meta_ac, private);
+ meta_ac, obj);
if (status < 0) {
mlog_errno(status);
goto leave;
@@ -4866,7 +4862,7 @@ int ocfs2_mark_extent_written(struct inode *inode, struct buffer_head *root_bh,
struct ocfs2_alloc_context *meta_ac,
struct ocfs2_cached_dealloc_ctxt *dealloc,
enum ocfs2_extent_tree_type et_type,
- void *private)
+ void *obj)
{
int ret, index;
u64 start_blkno = ocfs2_clusters_to_blocks(inode->i_sb, phys);
@@ -4878,7 +4874,7 @@ int ocfs2_mark_extent_written(struct inode *inode, struct buffer_head *root_bh,
mlog(0, "Inode %lu cpos %u, len %u, phys %u (%llu)\n",
inode->i_ino, cpos, len, phys, (unsigned long long)start_blkno);

- ocfs2_get_extent_tree(&et, inode, root_bh, et_type, private);
+ ocfs2_get_extent_tree(&et, inode, root_bh, et_type, obj);

if (!ocfs2_writes_unwritten_extents(OCFS2_SB(inode->i_sb))) {
ocfs2_error(inode->i_sb, "Inode %llu has unwritten extents "
@@ -5170,7 +5166,7 @@ int ocfs2_remove_extent(struct inode *inode, struct buffer_head *root_bh,
struct ocfs2_alloc_context *meta_ac,
struct ocfs2_cached_dealloc_ctxt *dealloc,
enum ocfs2_extent_tree_type et_type,
- void *private)
+ void *obj)
{
int ret, index;
u32 rec_range, trunc_range;
@@ -5179,7 +5175,7 @@ int ocfs2_remove_extent(struct inode *inode, struct buffer_head *root_bh,
struct ocfs2_path *path = NULL;
struct ocfs2_extent_tree et;

- ocfs2_get_extent_tree(&et, inode, root_bh, et_type, private);
+ ocfs2_get_extent_tree(&et, inode, root_bh, et_type, obj);

ocfs2_extent_map_trunc(inode, 0);

--
1.5.4.5