[PATCH 31/39] ocfs2: Make ocfs2_extent_tree the first-class representation of a tree.

Mark Fasheh
2008-09-24T22:10:27Z

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

We now have three different kinds of extent trees in ocfs2: inode data
(dinode), extended attributes (xattr_tree), and extended attribute
values (xattr_value). There is a nice abstraction for them,
ocfs2_extent_tree, but it is hidden in alloc.c. All the calling
functions have to pick amongst a varied API and pass in type bits and
often extraneous pointers.

A better way is to make ocfs2_extent_tree a first-class object.
Everyone converts their object to an ocfs2_extent_tree() via the
ocfs2_get_*_extent_tree() calls, then uses the ocfs2_extent_tree for all
tree calls to alloc.c.

This simplifies a lot of callers, making for readability. It also
provides an easy way to add additional extent tree types, as they only
need to be defined in alloc.c with a ocfs2_get_<new>_extent_tree()
function.

Signed-off-by: Joel Becker <joel.becker@oracle.com>
Signed-off-by: Mark Fasheh <mfasheh@suse.com>
---
fs/ocfs2/alloc.c | 300 +++++++++++++++-----------------------------------
fs/ocfs2/alloc.h | 111 +++++++++++---------
fs/ocfs2/aops.c | 16 ++-
fs/ocfs2/dir.c | 20 ++--
fs/ocfs2/file.c | 36 ++++---
fs/ocfs2/suballoc.c | 12 +--
fs/ocfs2/suballoc.h | 6 +-
fs/ocfs2/xattr.c | 71 +++++++------
8 files changed, 240 insertions(+), 332 deletions(-)

diff --git a/fs/ocfs2/alloc.c b/fs/ocfs2/alloc.c
index 2083c2c..d196d40 100644
--- a/fs/ocfs2/alloc.c
+++ b/fs/ocfs2/alloc.c
@@ -49,20 +49,6 @@

#include "buffer_head_io.h"

-/*
- * ocfs2_extent_tree and ocfs2_extent_tree_operations are used to abstract
- * the b-tree operations in ocfs2. Now all the b-tree operations are not
- * limited to ocfs2_dinode only. Any data which need to allocate clusters
- * to store can use b-tree. And it only needs to implement its ocfs2_extent_tree
- * and operation.
- *
- * ocfs2_extent_tree contains info for the root of the b-tree, it must have a
- * root ocfs2_extent_list and a root_bh so that they can be used in the b-tree
- * functions.
- * ocfs2_extent_tree_operations abstract the normal operations we do for
- * the root of extent b-tree.
- */
-struct ocfs2_extent_tree;

struct ocfs2_extent_tree_operations {
void (*eo_set_last_eb_blk)(struct ocfs2_extent_tree *et,
@@ -83,28 +69,38 @@ struct ocfs2_extent_tree_operations {
struct ocfs2_extent_tree *et);
};

-struct ocfs2_extent_tree {
- enum ocfs2_extent_tree_type et_type;
- struct ocfs2_extent_tree_operations *et_ops;
- struct buffer_head *et_root_bh;
- struct ocfs2_extent_list *et_root_el;
- void *et_object;
- unsigned int et_max_leaf_clusters;
-};

-static void ocfs2_dinode_fill_root_el(struct ocfs2_extent_tree *et)
-{
- struct ocfs2_dinode *di = et->et_object;
-
- et->et_root_el = &di->id2.i_list;
-}
+/*
+ * Pre-declare ocfs2_dinode_et_ops so we can use it as a sanity check
+ * in the methods.
+ */
+static u64 ocfs2_dinode_get_last_eb_blk(struct ocfs2_extent_tree *et);
+static void ocfs2_dinode_set_last_eb_blk(struct ocfs2_extent_tree *et,
+ u64 blkno);
+static void ocfs2_dinode_update_clusters(struct inode *inode,
+ struct ocfs2_extent_tree *et,
+ u32 clusters);
+static int ocfs2_dinode_insert_check(struct inode *inode,
+ struct ocfs2_extent_tree *et,
+ struct ocfs2_extent_rec *rec);
+static int ocfs2_dinode_sanity_check(struct inode *inode,
+ struct ocfs2_extent_tree *et);
+static void ocfs2_dinode_fill_root_el(struct ocfs2_extent_tree *et);
+static struct ocfs2_extent_tree_operations ocfs2_dinode_et_ops = {
+ .eo_set_last_eb_blk = ocfs2_dinode_set_last_eb_blk,
+ .eo_get_last_eb_blk = ocfs2_dinode_get_last_eb_blk,
+ .eo_update_clusters = ocfs2_dinode_update_clusters,
+ .eo_insert_check = ocfs2_dinode_insert_check,
+ .eo_sanity_check = ocfs2_dinode_sanity_check,
+ .eo_fill_root_el = ocfs2_dinode_fill_root_el,
+};

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

- BUG_ON(et->et_type != OCFS2_DINODE_EXTENT);
+ BUG_ON(et->et_ops != &ocfs2_dinode_et_ops);
di->i_last_eb_blk = cpu_to_le64(blkno);
}

@@ -112,7 +108,7 @@ static u64 ocfs2_dinode_get_last_eb_blk(struct ocfs2_extent_tree *et)
{
struct ocfs2_dinode *di = et->et_object;

- BUG_ON(et->et_type != OCFS2_DINODE_EXTENT);
+ BUG_ON(et->et_ops != &ocfs2_dinode_et_ops);
return le64_to_cpu(di->i_last_eb_blk);
}

@@ -153,7 +149,7 @@ static int ocfs2_dinode_sanity_check(struct inode *inode,
int ret = 0;
struct ocfs2_dinode *di;

- BUG_ON(et->et_type != OCFS2_DINODE_EXTENT);
+ BUG_ON(et->et_ops != &ocfs2_dinode_et_ops);

di = et->et_object;
if (!OCFS2_IS_VALID_DINODE(di)) {
@@ -166,14 +162,13 @@ static int ocfs2_dinode_sanity_check(struct inode *inode,
return ret;
}

-static struct ocfs2_extent_tree_operations ocfs2_dinode_et_ops = {
- .eo_set_last_eb_blk = ocfs2_dinode_set_last_eb_blk,
- .eo_get_last_eb_blk = ocfs2_dinode_get_last_eb_blk,
- .eo_update_clusters = ocfs2_dinode_update_clusters,
- .eo_insert_check = ocfs2_dinode_insert_check,
- .eo_sanity_check = ocfs2_dinode_sanity_check,
- .eo_fill_root_el = ocfs2_dinode_fill_root_el,
-};
+static void ocfs2_dinode_fill_root_el(struct ocfs2_extent_tree *et)
+{
+ struct ocfs2_dinode *di = et->et_object;
+
+ et->et_root_el = &di->id2.i_list;
+}
+

static void ocfs2_xattr_value_fill_root_el(struct ocfs2_extent_tree *et)
{
@@ -269,10 +264,8 @@ static void __ocfs2_get_extent_tree(struct ocfs2_extent_tree *et,
struct inode *inode,
struct buffer_head *bh,
void *obj,
- enum ocfs2_extent_tree_type et_type,
struct ocfs2_extent_tree_operations *ops)
{
- et->et_type = et_type;
et->et_ops = ops;
get_bh(bh);
et->et_root_bh = bh;
@@ -287,50 +280,31 @@ static void __ocfs2_get_extent_tree(struct ocfs2_extent_tree *et,
et->et_ops->eo_fill_max_leaf_clusters(inode, et);
}

-static void ocfs2_get_dinode_extent_tree(struct ocfs2_extent_tree *et,
- struct inode *inode,
- struct buffer_head *bh)
+void ocfs2_get_dinode_extent_tree(struct ocfs2_extent_tree *et,
+ struct inode *inode,
+ struct buffer_head *bh)
{
- __ocfs2_get_extent_tree(et, inode, bh, NULL, OCFS2_DINODE_EXTENT,
- &ocfs2_dinode_et_ops);
+ __ocfs2_get_extent_tree(et, inode, bh, NULL, &ocfs2_dinode_et_ops);
}

-static void ocfs2_get_xattr_tree_extent_tree(struct ocfs2_extent_tree *et,
- struct inode *inode,
- struct buffer_head *bh)
+void ocfs2_get_xattr_tree_extent_tree(struct ocfs2_extent_tree *et,
+ struct inode *inode,
+ struct buffer_head *bh)
{
__ocfs2_get_extent_tree(et, inode, bh, NULL,
- OCFS2_XATTR_TREE_EXTENT,
&ocfs2_xattr_tree_et_ops);
}

-static void ocfs2_get_xattr_value_extent_tree(struct ocfs2_extent_tree *et,
- struct inode *inode,
- struct buffer_head *bh,
- struct ocfs2_xattr_value_root *xv)
+void ocfs2_get_xattr_value_extent_tree(struct ocfs2_extent_tree *et,
+ struct inode *inode,
+ struct buffer_head *bh,
+ struct ocfs2_xattr_value_root *xv)
{
__ocfs2_get_extent_tree(et, inode, bh, xv,
- OCFS2_XATTR_VALUE_EXTENT,
&ocfs2_xattr_value_et_ops);
}

-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 *obj)
-{
- if (et_type == OCFS2_DINODE_EXTENT)
- ocfs2_get_dinode_extent_tree(et, inode, bh);
- else if (et_type == OCFS2_XATTR_VALUE_EXTENT)
- ocfs2_get_xattr_tree_extent_tree(et, inode, bh);
- else if (et_type == OCFS2_XATTR_TREE_EXTENT)
- ocfs2_get_xattr_value_extent_tree(et, inode, bh, obj);
- else
- BUG();
-}
-
-static void ocfs2_put_extent_tree(struct ocfs2_extent_tree *et)
+void ocfs2_put_extent_tree(struct ocfs2_extent_tree *et)
{
brelse(et->et_root_bh);
}
@@ -682,22 +656,18 @@ struct ocfs2_merge_ctxt {
*/
int ocfs2_num_free_extents(struct ocfs2_super *osb,
struct inode *inode,
- struct buffer_head *root_bh,
- enum ocfs2_extent_tree_type type,
- void *obj)
+ struct ocfs2_extent_tree *et)
{
int retval;
struct ocfs2_extent_list *el = NULL;
struct ocfs2_extent_block *eb;
struct buffer_head *eb_bh = NULL;
u64 last_eb_blk = 0;
- struct ocfs2_extent_tree et;

mlog_entry_void();

- ocfs2_get_extent_tree(&et, inode, root_bh, type, obj);
- el = et.et_root_el;
- last_eb_blk = ocfs2_et_get_last_eb_blk(&et);
+ el = et->et_root_el;
+ last_eb_blk = ocfs2_et_get_last_eb_blk(et);

if (last_eb_blk) {
retval = ocfs2_read_block(osb, last_eb_blk,
@@ -717,7 +687,6 @@ bail:
if (eb_bh)
brelse(eb_bh);

- ocfs2_put_extent_tree(&et);
mlog_exit(retval);
return retval;
}
@@ -4415,16 +4384,15 @@ out:
*
* The caller needs to update fe->i_clusters
*/
-static int ocfs2_insert_extent(struct ocfs2_super *osb,
- handle_t *handle,
- struct inode *inode,
- struct buffer_head *root_bh,
- u32 cpos,
- u64 start_blk,
- u32 new_clusters,
- u8 flags,
- struct ocfs2_alloc_context *meta_ac,
- struct ocfs2_extent_tree *et)
+int ocfs2_insert_extent(struct ocfs2_super *osb,
+ handle_t *handle,
+ struct inode *inode,
+ struct ocfs2_extent_tree *et,
+ u32 cpos,
+ u64 start_blk,
+ u32 new_clusters,
+ u8 flags,
+ struct ocfs2_alloc_context *meta_ac)
{
int status;
int uninitialized_var(free_records);
@@ -4473,7 +4441,7 @@ static int ocfs2_insert_extent(struct ocfs2_super *osb,
status = ocfs2_do_insert_extent(inode, handle, et, &rec, &insert);
if (status < 0)
mlog_errno(status);
- else if (et->et_type == OCFS2_DINODE_EXTENT)
+ else if (et->et_ops == &ocfs2_dinode_et_ops)
ocfs2_extent_map_insert_rec(inode, &rec);

bail:
@@ -4484,77 +4452,10 @@ bail:
return status;
}

-int ocfs2_dinode_insert_extent(struct ocfs2_super *osb,
- handle_t *handle,
- struct inode *inode,
- struct buffer_head *root_bh,
- u32 cpos,
- u64 start_blk,
- u32 new_clusters,
- u8 flags,
- struct ocfs2_alloc_context *meta_ac)
-{
- int status;
- struct ocfs2_extent_tree et;
-
- ocfs2_get_dinode_extent_tree(&et, inode, root_bh);
- status = ocfs2_insert_extent(osb, handle, inode, root_bh,
- cpos, start_blk, new_clusters,
- flags, meta_ac, &et);
- ocfs2_put_extent_tree(&et);
-
- return status;
-}
-
-int ocfs2_xattr_value_insert_extent(struct ocfs2_super *osb,
- handle_t *handle,
- struct inode *inode,
- struct buffer_head *root_bh,
- u32 cpos,
- u64 start_blk,
- u32 new_clusters,
- u8 flags,
- struct ocfs2_alloc_context *meta_ac,
- struct ocfs2_xattr_value_root *xv)
-{
- int status;
- struct ocfs2_extent_tree et;
-
- ocfs2_get_xattr_value_extent_tree(&et, inode, root_bh, xv);
- status = ocfs2_insert_extent(osb, handle, inode, root_bh,
- cpos, start_blk, new_clusters,
- flags, meta_ac, &et);
- ocfs2_put_extent_tree(&et);
-
- return status;
-}
-
-int ocfs2_xattr_tree_insert_extent(struct ocfs2_super *osb,
- handle_t *handle,
- struct inode *inode,
- struct buffer_head *root_bh,
- u32 cpos,
- u64 start_blk,
- u32 new_clusters,
- u8 flags,
- struct ocfs2_alloc_context *meta_ac)
-{
- int status;
- struct ocfs2_extent_tree et;
-
- ocfs2_get_xattr_tree_extent_tree(&et, inode, root_bh);
- status = ocfs2_insert_extent(osb, handle, inode, root_bh,
- cpos, start_blk, new_clusters,
- flags, meta_ac, &et);
- ocfs2_put_extent_tree(&et);
-
- return status;
-}
-
/*
* Allcate and add clusters into the extent b-tree.
* The new clusters(clusters_to_add) will be inserted at logical_offset.
- * The extent b-tree's root is root_el and it should be in root_bh, and
+ * The extent b-tree's root is specified by et, and
* it is not limited to the file storage. Any extent tree can use this
* function if it implements the proper ocfs2_extent_tree.
*/
@@ -4563,14 +4464,11 @@ int ocfs2_add_clusters_in_btree(struct ocfs2_super *osb,
u32 *logical_offset,
u32 clusters_to_add,
int mark_unwritten,
- struct buffer_head *root_bh,
- struct ocfs2_extent_list *root_el,
+ struct ocfs2_extent_tree *et,
handle_t *handle,
struct ocfs2_alloc_context *data_ac,
struct ocfs2_alloc_context *meta_ac,
- enum ocfs2_alloc_restarted *reason_ret,
- enum ocfs2_extent_tree_type type,
- void *obj)
+ enum ocfs2_alloc_restarted *reason_ret)
{
int status = 0;
int free_extents;
@@ -4584,8 +4482,7 @@ int ocfs2_add_clusters_in_btree(struct ocfs2_super *osb,
if (mark_unwritten)
flags = OCFS2_EXT_UNWRITTEN;

- free_extents = ocfs2_num_free_extents(osb, inode, root_bh, type,
- obj);
+ free_extents = ocfs2_num_free_extents(osb, inode, et);
if (free_extents < 0) {
status = free_extents;
mlog_errno(status);
@@ -4604,7 +4501,7 @@ int ocfs2_add_clusters_in_btree(struct ocfs2_super *osb,
goto leave;
} else if ((!free_extents)
&& (ocfs2_alloc_context_bits_left(meta_ac)
- < ocfs2_extend_meta_needed(root_el))) {
+ < ocfs2_extend_meta_needed(et->et_root_el))) {
mlog(0, "filesystem is really fragmented...\n");
status = -EAGAIN;
reason = RESTART_META;
@@ -4622,7 +4519,7 @@ int ocfs2_add_clusters_in_btree(struct ocfs2_super *osb,
BUG_ON(num_bits > clusters_to_add);

/* reserve our write early -- insert_extent may update the inode */
- status = ocfs2_journal_access(handle, inode, root_bh,
+ status = ocfs2_journal_access(handle, inode, et->et_root_bh,
OCFS2_JOURNAL_ACCESS_WRITE);
if (status < 0) {
mlog_errno(status);
@@ -4632,28 +4529,15 @@ int ocfs2_add_clusters_in_btree(struct ocfs2_super *osb,
block = ocfs2_clusters_to_blocks(osb->sb, bit_off);
mlog(0, "Allocating %u clusters at block %u for inode %llu\n",
num_bits, bit_off, (unsigned long long)OCFS2_I(inode)->ip_blkno);
- if (type == OCFS2_DINODE_EXTENT)
- status = ocfs2_dinode_insert_extent(osb, handle, inode, root_bh,
- *logical_offset, block,
- num_bits, flags, meta_ac);
- else if (type == OCFS2_XATTR_TREE_EXTENT)
- status = ocfs2_xattr_tree_insert_extent(osb, handle,
- inode, root_bh,
- *logical_offset,
- block, num_bits, flags,
- meta_ac);
- else
- status = ocfs2_xattr_value_insert_extent(osb, handle,
- inode, root_bh,
- *logical_offset,
- block, num_bits, flags,
- meta_ac, obj);
+ status = ocfs2_insert_extent(osb, handle, inode, et,
+ *logical_offset, block,
+ num_bits, flags, meta_ac);
if (status < 0) {
mlog_errno(status);
goto leave;
}

- status = ocfs2_journal_dirty(handle, root_bh);
+ status = ocfs2_journal_dirty(handle, et->et_root_bh);
if (status < 0) {
mlog_errno(status);
goto leave;
@@ -4924,25 +4808,21 @@ out:
*
* The caller is responsible for passing down meta_ac if we'll need it.
*/
-int ocfs2_mark_extent_written(struct inode *inode, struct buffer_head *root_bh,
+int ocfs2_mark_extent_written(struct inode *inode,
+ struct ocfs2_extent_tree *et,
handle_t *handle, u32 cpos, u32 len, u32 phys,
struct ocfs2_alloc_context *meta_ac,
- struct ocfs2_cached_dealloc_ctxt *dealloc,
- enum ocfs2_extent_tree_type et_type,
- void *obj)
+ struct ocfs2_cached_dealloc_ctxt *dealloc)
{
int ret, index;
u64 start_blkno = ocfs2_clusters_to_blocks(inode->i_sb, phys);
struct ocfs2_extent_rec split_rec;
struct ocfs2_path *left_path = NULL;
struct ocfs2_extent_list *el;
- struct ocfs2_extent_tree et;

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, obj);
-
if (!ocfs2_writes_unwritten_extents(OCFS2_SB(inode->i_sb))) {
ocfs2_error(inode->i_sb, "Inode %llu has unwritten extents "
"that are being written to, but the feature bit "
@@ -4955,11 +4835,14 @@ int ocfs2_mark_extent_written(struct inode *inode, struct buffer_head *root_bh,
/*
* XXX: This should be fixed up so that we just re-insert the
* next extent records.
+ *
+ * XXX: This is a hack on the extent tree, maybe it should be
+ * an op?
*/
- if (et_type == OCFS2_DINODE_EXTENT)
+ if (et->et_ops == &ocfs2_dinode_et_ops)
ocfs2_extent_map_trunc(inode, 0);

- left_path = ocfs2_new_path(et.et_root_bh, et.et_root_el);
+ left_path = ocfs2_new_path(et->et_root_bh, et->et_root_el);
if (!left_path) {
ret = -ENOMEM;
mlog_errno(ret);
@@ -4990,7 +4873,7 @@ int ocfs2_mark_extent_written(struct inode *inode, struct buffer_head *root_bh,
split_rec.e_flags = path_leaf_el(left_path)->l_recs[index].e_flags;
split_rec.e_flags &= ~OCFS2_EXT_UNWRITTEN;

- ret = __ocfs2_mark_extent_written(inode, &et, handle, left_path,
+ ret = __ocfs2_mark_extent_written(inode, et, handle, left_path,
index, &split_rec, meta_ac,
dealloc);
if (ret)
@@ -4998,7 +4881,6 @@ int ocfs2_mark_extent_written(struct inode *inode, struct buffer_head *root_bh,

out:
ocfs2_free_path(left_path);
- ocfs2_put_extent_tree(&et);
return ret;
}

@@ -5228,25 +5110,21 @@ out:
return ret;
}

-int ocfs2_remove_extent(struct inode *inode, struct buffer_head *root_bh,
+int ocfs2_remove_extent(struct inode *inode,
+ struct ocfs2_extent_tree *et,
u32 cpos, u32 len, handle_t *handle,
struct ocfs2_alloc_context *meta_ac,
- struct ocfs2_cached_dealloc_ctxt *dealloc,
- enum ocfs2_extent_tree_type et_type,
- void *obj)
+ struct ocfs2_cached_dealloc_ctxt *dealloc)
{
int ret, index;
u32 rec_range, trunc_range;
struct ocfs2_extent_rec *rec;
struct ocfs2_extent_list *el;
struct ocfs2_path *path = NULL;
- struct ocfs2_extent_tree et;
-
- ocfs2_get_extent_tree(&et, inode, root_bh, et_type, obj);

ocfs2_extent_map_trunc(inode, 0);

- path = ocfs2_new_path(et.et_root_bh, et.et_root_el);
+ path = ocfs2_new_path(et->et_root_bh, et->et_root_el);
if (!path) {
ret = -ENOMEM;
mlog_errno(ret);
@@ -5299,13 +5177,13 @@ int ocfs2_remove_extent(struct inode *inode, struct buffer_head *root_bh,

if (le32_to_cpu(rec->e_cpos) == cpos || rec_range == trunc_range) {
ret = ocfs2_truncate_rec(inode, handle, path, index, dealloc,
- cpos, len, &et);
+ cpos, len, et);
if (ret) {
mlog_errno(ret);
goto out;
}
} else {
- ret = ocfs2_split_tree(inode, &et, handle, path, index,
+ ret = ocfs2_split_tree(inode, et, handle, path, index,
trunc_range, meta_ac);
if (ret) {
mlog_errno(ret);
@@ -5354,7 +5232,7 @@ int ocfs2_remove_extent(struct inode *inode, struct buffer_head *root_bh,
}

ret = ocfs2_truncate_rec(inode, handle, path, index, dealloc,
- cpos, len, &et);
+ cpos, len, et);
if (ret) {
mlog_errno(ret);
goto out;
@@ -5363,7 +5241,6 @@ int ocfs2_remove_extent(struct inode *inode, struct buffer_head *root_bh,

out:
ocfs2_free_path(path);
- ocfs2_put_extent_tree(&et);
return ret;
}

@@ -6782,6 +6659,7 @@ int ocfs2_convert_inline_data_to_extents(struct inode *inode,
struct ocfs2_alloc_context *data_ac = NULL;
struct page **pages = NULL;
loff_t end = osb->s_clustersize;
+ struct ocfs2_extent_tree et;

has_data = i_size_read(inode) ? 1 : 0;

@@ -6881,8 +6759,10 @@ int ocfs2_convert_inline_data_to_extents(struct inode *inode,
* this proves to be false, we could always re-build
* the in-inode data from our pages.
*/
- ret = ocfs2_dinode_insert_extent(osb, handle, inode, di_bh,
- 0, block, 1, 0, NULL);
+ ocfs2_get_dinode_extent_tree(&et, inode, di_bh);
+ ret = ocfs2_insert_extent(osb, handle, inode, &et,
+ 0, block, 1, 0, NULL);
+ ocfs2_put_extent_tree(&et);
if (ret) {
mlog_errno(ret);
goto out_commit;
diff --git a/fs/ocfs2/alloc.h b/fs/ocfs2/alloc.h
index 04a551f..27311da 100644
--- a/fs/ocfs2/alloc.h
+++ b/fs/ocfs2/alloc.h
@@ -26,46 +26,66 @@
#ifndef OCFS2_ALLOC_H
#define OCFS2_ALLOC_H

-enum ocfs2_extent_tree_type {
- OCFS2_DINODE_EXTENT = 0,
- OCFS2_XATTR_VALUE_EXTENT,
- OCFS2_XATTR_TREE_EXTENT,
-};

/*
* For xattr tree leaf, we limit the leaf byte size to be 64K.
*/
#define OCFS2_MAX_XATTR_TREE_LEAF_SIZE 65536

+/*
+ * ocfs2_extent_tree and ocfs2_extent_tree_operations are used to abstract
+ * the b-tree operations in ocfs2. Now all the b-tree operations are not
+ * limited to ocfs2_dinode only. Any data which need to allocate clusters
+ * to store can use b-tree. And it only needs to implement its ocfs2_extent_tree
+ * and operation.
+ *
+ * ocfs2_extent_tree becomes the first-class object for extent tree
+ * manipulation. Callers of the alloc.c code need to fill it via one of
+ * the ocfs2_get_*_extent_tree() operations below.
+ *
+ * ocfs2_extent_tree contains info for the root of the b-tree, it must have a
+ * root ocfs2_extent_list and a root_bh so that they can be used in the b-tree
+ * functions.
+ * ocfs2_extent_tree_operations abstract the normal operations we do for
+ * the root of extent b-tree.
+ */
+struct ocfs2_extent_tree_operations;
+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_object;
+ unsigned int et_max_leaf_clusters;
+};
+
+/*
+ * ocfs2_*_get_extent_tree() will fill an ocfs2_extent_tree from the
+ * specified object buffer. The bh is referenced until
+ * ocfs2_put_extent_tree().
+ */
+void ocfs2_get_dinode_extent_tree(struct ocfs2_extent_tree *et,
+ struct inode *inode,
+ struct buffer_head *bh);
+void ocfs2_get_xattr_tree_extent_tree(struct ocfs2_extent_tree *et,
+ struct inode *inode,
+ struct buffer_head *bh);
+void ocfs2_get_xattr_value_extent_tree(struct ocfs2_extent_tree *et,
+ struct inode *inode,
+ struct buffer_head *bh,
+ struct ocfs2_xattr_value_root *xv);
+void ocfs2_put_extent_tree(struct ocfs2_extent_tree *et);
+
struct ocfs2_alloc_context;
-int ocfs2_dinode_insert_extent(struct ocfs2_super *osb,
- handle_t *handle,
- struct inode *inode,
- struct buffer_head *root_bh,
- u32 cpos,
- u64 start_blk,
- u32 new_clusters,
- u8 flags,
- struct ocfs2_alloc_context *meta_ac);
-int ocfs2_xattr_value_insert_extent(struct ocfs2_super *osb,
- handle_t *handle,
- struct inode *inode,
- struct buffer_head *root_bh,
- u32 cpos,
- u64 start_blk,
- u32 new_clusters,
- u8 flags,
- struct ocfs2_alloc_context *meta_ac,
- struct ocfs2_xattr_value_root *xv);
-int ocfs2_xattr_tree_insert_extent(struct ocfs2_super *osb,
- handle_t *handle,
- struct inode *inode,
- struct buffer_head *root_bh,
- u32 cpos,
- u64 start_blk,
- u32 new_clusters,
- u8 flags,
- struct ocfs2_alloc_context *meta_ac);
+int ocfs2_insert_extent(struct ocfs2_super *osb,
+ handle_t *handle,
+ struct inode *inode,
+ struct ocfs2_extent_tree *et,
+ u32 cpos,
+ u64 start_blk,
+ u32 new_clusters,
+ u8 flags,
+ struct ocfs2_alloc_context *meta_ac);
+
enum ocfs2_alloc_restarted {
RESTART_NONE = 0,
RESTART_TRANS,
@@ -76,32 +96,25 @@ int ocfs2_add_clusters_in_btree(struct ocfs2_super *osb,
u32 *logical_offset,
u32 clusters_to_add,
int mark_unwritten,
- struct buffer_head *root_bh,
- struct ocfs2_extent_list *root_el,
+ struct ocfs2_extent_tree *et,
handle_t *handle,
struct ocfs2_alloc_context *data_ac,
struct ocfs2_alloc_context *meta_ac,
- enum ocfs2_alloc_restarted *reason_ret,
- enum ocfs2_extent_tree_type type,
- void *private);
+ enum ocfs2_alloc_restarted *reason_ret);
struct ocfs2_cached_dealloc_ctxt;
-int ocfs2_mark_extent_written(struct inode *inode, struct buffer_head *root_bh,
+int ocfs2_mark_extent_written(struct inode *inode,
+ struct ocfs2_extent_tree *et,
handle_t *handle, u32 cpos, u32 len, u32 phys,
struct ocfs2_alloc_context *meta_ac,
- struct ocfs2_cached_dealloc_ctxt *dealloc,
- enum ocfs2_extent_tree_type et_type,
- void *private);
-int ocfs2_remove_extent(struct inode *inode, struct buffer_head *root_bh,
+ struct ocfs2_cached_dealloc_ctxt *dealloc);
+int ocfs2_remove_extent(struct inode *inode,
+ struct ocfs2_extent_tree *et,
u32 cpos, u32 len, handle_t *handle,
struct ocfs2_alloc_context *meta_ac,
- struct ocfs2_cached_dealloc_ctxt *dealloc,
- enum ocfs2_extent_tree_type et_type,
- void *private);
+ struct ocfs2_cached_dealloc_ctxt *dealloc);
int ocfs2_num_free_extents(struct ocfs2_super *osb,
struct inode *inode,
- struct buffer_head *root_bh,
- enum ocfs2_extent_tree_type et_type,
- void *private);
+ struct ocfs2_extent_tree *et);

/*
* how many new metadata chunks would an allocation need at maximum?
diff --git a/fs/ocfs2/aops.c b/fs/ocfs2/aops.c
index 530b1ff..ed937fa 100644
--- a/fs/ocfs2/aops.c
+++ b/fs/ocfs2/aops.c
@@ -1242,6 +1242,7 @@ static int ocfs2_write_cluster(struct address_space *mapping,
int ret, i, new, should_zero = 0;
u64 v_blkno, p_blkno;
struct inode *inode = mapping->host;
+ struct ocfs2_extent_tree et;

new = phys == 0 ? 1 : 0;
if (new || unwritten)
@@ -1276,10 +1277,11 @@ static int ocfs2_write_cluster(struct address_space *mapping,
goto out;
}
} else if (unwritten) {
- ret = ocfs2_mark_extent_written(inode, wc->w_di_bh,
+ ocfs2_get_dinode_extent_tree(&et, inode, wc->w_di_bh);
+ ret = ocfs2_mark_extent_written(inode, &et,
wc->w_handle, cpos, 1, phys,
- meta_ac, &wc->w_dealloc,
- OCFS2_DINODE_EXTENT, NULL);
+ meta_ac, &wc->w_dealloc);
+ ocfs2_put_extent_tree(&et);
if (ret < 0) {
mlog_errno(ret);
goto out;
@@ -1666,6 +1668,7 @@ int ocfs2_write_begin_nolock(struct address_space *mapping,
struct ocfs2_alloc_context *data_ac = NULL;
struct ocfs2_alloc_context *meta_ac = NULL;
handle_t *handle;
+ struct ocfs2_extent_tree et;

ret = ocfs2_alloc_write_ctxt(&wc, osb, pos, len, di_bh);
if (ret) {
@@ -1719,10 +1722,11 @@ int ocfs2_write_begin_nolock(struct address_space *mapping,
(long long)i_size_read(inode), le32_to_cpu(di->i_clusters),
clusters_to_alloc, extents_to_split);

- ret = ocfs2_lock_allocators(inode, wc->w_di_bh, &di->id2.i_list,
+ ocfs2_get_dinode_extent_tree(&et, inode, wc->w_di_bh);
+ ret = ocfs2_lock_allocators(inode, &et,
clusters_to_alloc, extents_to_split,
- &data_ac, &meta_ac,
- OCFS2_DINODE_EXTENT, NULL);
+ &data_ac, &meta_ac);
+ ocfs2_put_extent_tree(&et);
if (ret) {
mlog_errno(ret);
goto out;
diff --git a/fs/ocfs2/dir.c b/fs/ocfs2/dir.c
index 5426a02..2cdc553 100644
--- a/fs/ocfs2/dir.c
+++ b/fs/ocfs2/dir.c
@@ -1192,6 +1192,9 @@ static int ocfs2_expand_inline_dir(struct inode *dir, struct buffer_head *di_bh,
struct buffer_head *dirdata_bh = NULL;
struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
handle_t *handle;
+ struct ocfs2_extent_tree et;
+
+ ocfs2_get_dinode_extent_tree(&et, dir, di_bh);

alloc = ocfs2_clusters_for_bytes(sb, bytes);

@@ -1305,8 +1308,8 @@ static int ocfs2_expand_inline_dir(struct inode *dir, struct buffer_head *di_bh,
* This should never fail as our extent list is empty and all
* related blocks have been journaled already.
*/
- ret = ocfs2_dinode_insert_extent(osb, handle, dir, di_bh, 0, blkno,
- len, 0, NULL);
+ ret = ocfs2_insert_extent(osb, handle, dir, &et, 0, blkno, len,
+ 0, NULL);
if (ret) {
mlog_errno(ret);
goto out_commit;
@@ -1337,8 +1340,8 @@ static int ocfs2_expand_inline_dir(struct inode *dir, struct buffer_head *di_bh,
}
blkno = ocfs2_clusters_to_blocks(dir->i_sb, bit_off);

- ret = ocfs2_dinode_insert_extent(osb, handle, dir, di_bh, 1,
- blkno, len, 0, NULL);
+ ret = ocfs2_insert_extent(osb, handle, dir, &et, 1,
+ blkno, len, 0, NULL);
if (ret) {
mlog_errno(ret);
goto out_commit;
@@ -1360,6 +1363,7 @@ out:

brelse(dirdata_bh);

+ ocfs2_put_extent_tree(&et);
return ret;
}

@@ -1437,6 +1441,7 @@ static int ocfs2_extend_dir(struct ocfs2_super *osb,
struct buffer_head *new_bh = NULL;
struct ocfs2_dir_entry * de;
struct super_block *sb = osb->sb;
+ struct ocfs2_extent_tree et;

mlog_entry_void();

@@ -1480,10 +1485,9 @@ static int ocfs2_extend_dir(struct ocfs2_super *osb,
spin_lock(&OCFS2_I(dir)->ip_lock);
if (dir_i_size == ocfs2_clusters_to_bytes(sb, OCFS2_I(dir)->ip_clusters)) {
spin_unlock(&OCFS2_I(dir)->ip_lock);
- num_free_extents = ocfs2_num_free_extents(osb, dir,
- parent_fe_bh,
- OCFS2_DINODE_EXTENT,
- NULL);
+ ocfs2_get_dinode_extent_tree(&et, dir, parent_fe_bh);
+ num_free_extents = ocfs2_num_free_extents(osb, dir, &et);
+ ocfs2_put_extent_tree(&et);
if (num_free_extents < 0) {
status = num_free_extents;
mlog_errno(status);
diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c
index 7ddb363..659eb70 100644
--- a/fs/ocfs2/file.c
+++ b/fs/ocfs2/file.c
@@ -509,14 +509,17 @@ int ocfs2_add_inode_data(struct ocfs2_super *osb,
struct ocfs2_alloc_context *meta_ac,
enum ocfs2_alloc_restarted *reason_ret)
{
- struct ocfs2_dinode *fe = (struct ocfs2_dinode *) fe_bh->b_data;
- struct ocfs2_extent_list *el = &fe->id2.i_list;
+ int ret;
+ struct ocfs2_extent_tree et;

- return ocfs2_add_clusters_in_btree(osb, inode, logical_offset,
+ ocfs2_get_dinode_extent_tree(&et, inode, fe_bh);
+ ret = ocfs2_add_clusters_in_btree(osb, inode, logical_offset,
clusters_to_add, mark_unwritten,
- fe_bh, el, handle,
- data_ac, meta_ac, reason_ret,
- OCFS2_DINODE_EXTENT, NULL);
+ &et, handle,
+ data_ac, meta_ac, reason_ret);
+ ocfs2_put_extent_tree(&et);
+
+ return ret;
}

static int __ocfs2_extend_allocation(struct inode *inode, u32 logical_start,
@@ -533,6 +536,7 @@ static int __ocfs2_extend_allocation(struct inode *inode, u32 logical_start,
struct ocfs2_alloc_context *meta_ac = NULL;
enum ocfs2_alloc_restarted why;
struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
+ struct ocfs2_extent_tree et;

mlog_entry("(clusters_to_add = %u)\n", clusters_to_add);

@@ -564,9 +568,10 @@ restart_all:
(unsigned long long)OCFS2_I(inode)->ip_blkno,
(long long)i_size_read(inode), le32_to_cpu(fe->i_clusters),
clusters_to_add);
- status = ocfs2_lock_allocators(inode, bh, &fe->id2.i_list,
- clusters_to_add, 0, &data_ac,
- &meta_ac, OCFS2_DINODE_EXTENT, NULL);
+ ocfs2_get_dinode_extent_tree(&et, inode, bh);
+ status = ocfs2_lock_allocators(inode, &et, clusters_to_add, 0,
+ &data_ac, &meta_ac);
+ ocfs2_put_extent_tree(&et);
if (status) {
mlog_errno(status);
goto leave;
@@ -1236,11 +1241,13 @@ static int __ocfs2_remove_inode_range(struct inode *inode,
handle_t *handle;
struct ocfs2_alloc_context *meta_ac = NULL;
struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
+ struct ocfs2_extent_tree et;
+
+ ocfs2_get_dinode_extent_tree(&et, inode, di_bh);

- ret = ocfs2_lock_allocators(inode, di_bh, &di->id2.i_list,
- 0, 1, NULL, &meta_ac,
- OCFS2_DINODE_EXTENT, NULL);
+ ret = ocfs2_lock_allocators(inode, &et, 0, 1, NULL, &meta_ac);
if (ret) {
+ ocfs2_put_extent_tree(&et);
mlog_errno(ret);
return ret;
}
@@ -1269,8 +1276,8 @@ static int __ocfs2_remove_inode_range(struct inode *inode,
goto out;
}

- ret = ocfs2_remove_extent(inode, di_bh, cpos, len, handle, meta_ac,
- dealloc, OCFS2_DINODE_EXTENT, NULL);
+ ret = ocfs2_remove_extent(inode, &et, cpos, len, handle, meta_ac,
+ dealloc);
if (ret) {
mlog_errno(ret);
goto out_commit;
@@ -1297,6 +1304,7 @@ out:
if (meta_ac)
ocfs2_free_alloc_context(meta_ac);

+ ocfs2_put_extent_tree(&et);
return ret;
}

diff --git a/fs/ocfs2/suballoc.c b/fs/ocfs2/suballoc.c
index f1871ca..8d3947e 100644
--- a/fs/ocfs2/suballoc.c
+++ b/fs/ocfs2/suballoc.c
@@ -1914,12 +1914,11 @@ static inline void ocfs2_debug_suballoc_inode(struct ocfs2_dinode *fe)
* File systems which don't support holes call this from
* ocfs2_extend_allocation().
*/
-int ocfs2_lock_allocators(struct inode *inode, struct buffer_head *root_bh,
- struct ocfs2_extent_list *root_el,
+int ocfs2_lock_allocators(struct inode *inode,
+ struct ocfs2_extent_tree *et,
u32 clusters_to_add, u32 extents_to_split,
struct ocfs2_alloc_context **data_ac,
- struct ocfs2_alloc_context **meta_ac,
- enum ocfs2_extent_tree_type type, void *private)
+ struct ocfs2_alloc_context **meta_ac)
{
int ret = 0, num_free_extents;
unsigned int max_recs_needed = clusters_to_add + 2 * extents_to_split;
@@ -1931,8 +1930,7 @@ int ocfs2_lock_allocators(struct inode *inode, struct buffer_head *root_bh,

BUG_ON(clusters_to_add != 0 && data_ac == NULL);

- num_free_extents = ocfs2_num_free_extents(osb, inode, root_bh,
- type, private);
+ num_free_extents = ocfs2_num_free_extents(osb, inode, et);
if (num_free_extents < 0) {
ret = num_free_extents;
mlog_errno(ret);
@@ -1954,7 +1952,7 @@ int ocfs2_lock_allocators(struct inode *inode, struct buffer_head *root_bh,
*/
if (!num_free_extents ||
(ocfs2_sparse_alloc(osb) && num_free_extents < max_recs_needed)) {
- ret = ocfs2_reserve_new_metadata(osb, root_el, meta_ac);
+ ret = ocfs2_reserve_new_metadata(osb, et->et_root_el, meta_ac);
if (ret < 0) {
if (ret != -ENOSPC)
mlog_errno(ret);
diff --git a/fs/ocfs2/suballoc.h b/fs/ocfs2/suballoc.h
index 028fd63..dd09636 100644
--- a/fs/ocfs2/suballoc.h
+++ b/fs/ocfs2/suballoc.h
@@ -165,10 +165,8 @@ u64 ocfs2_which_cluster_group(struct inode *inode, u32 cluster);
int ocfs2_check_group_descriptor(struct super_block *sb,
struct ocfs2_dinode *di,
struct ocfs2_group_desc *gd);
-int ocfs2_lock_allocators(struct inode *inode, struct buffer_head *root_bh,
- struct ocfs2_extent_list *root_el,
+int ocfs2_lock_allocators(struct inode *inode, struct ocfs2_extent_tree *et,
u32 clusters_to_add, u32 extents_to_split,
struct ocfs2_alloc_context **data_ac,
- struct ocfs2_alloc_context **meta_ac,
- enum ocfs2_extent_tree_type type, void *private);
+ struct ocfs2_alloc_context **meta_ac);
#endif /* _CHAINALLOC_H_ */
diff --git a/fs/ocfs2/xattr.c b/fs/ocfs2/xattr.c
index 1b349c7..9c3d4dc 100644
--- a/fs/ocfs2/xattr.c
+++ b/fs/ocfs2/xattr.c
@@ -206,22 +206,24 @@ static int ocfs2_xattr_extend_allocation(struct inode *inode,
struct ocfs2_alloc_context *meta_ac = NULL;
enum ocfs2_alloc_restarted why;
struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
- struct ocfs2_extent_list *root_el = &xv->xr_list;
u32 prev_clusters, logical_start = le32_to_cpu(xv->xr_clusters);
+ struct ocfs2_extent_tree et;

mlog(0, "(clusters_to_add for xattr= %u)\n", clusters_to_add);

+ ocfs2_get_xattr_value_extent_tree(&et, inode, xattr_bh, xv);
+
restart_all:

- status = ocfs2_lock_allocators(inode, xattr_bh, root_el,
- clusters_to_add, 0, &data_ac,
- &meta_ac, OCFS2_XATTR_VALUE_EXTENT, xv);
+ status = ocfs2_lock_allocators(inode, &et, clusters_to_add, 0,
+ &data_ac, &meta_ac);
if (status) {
mlog_errno(status);
goto leave;
}

- credits = ocfs2_calc_extend_credits(osb->sb, root_el, clusters_to_add);
+ credits = ocfs2_calc_extend_credits(osb->sb, et.et_root_el,
+ clusters_to_add);
handle = ocfs2_start_trans(osb, credits);
if (IS_ERR(handle)) {
status = PTR_ERR(handle);
@@ -244,14 +246,11 @@ restarted_transaction:
&logical_start,
clusters_to_add,
0,
- xattr_bh,
- root_el,
+ &et,
handle,
data_ac,
meta_ac,
- &why,
- OCFS2_XATTR_VALUE_EXTENT,
- xv);
+ &why);
if ((status < 0) && (status != -EAGAIN)) {
if (status != -ENOSPC)
mlog_errno(status);
@@ -276,7 +275,7 @@ restarted_transaction:
mlog(0, "restarting transaction.\n");
/* TODO: This can be more intelligent. */
credits = ocfs2_calc_extend_credits(osb->sb,
- root_el,
+ et.et_root_el,
clusters_to_add);
status = ocfs2_extend_trans(handle, credits);
if (status < 0) {
@@ -308,6 +307,7 @@ leave:
goto restart_all;
}

+ ocfs2_put_extent_tree(&et);
return status;
}

@@ -323,11 +323,13 @@ static int __ocfs2_remove_xattr_range(struct inode *inode,
struct inode *tl_inode = osb->osb_tl_inode;
handle_t *handle;
struct ocfs2_alloc_context *meta_ac = NULL;
+ struct ocfs2_extent_tree et;
+
+ ocfs2_get_xattr_value_extent_tree(&et, inode, root_bh, xv);

- ret = ocfs2_lock_allocators(inode, root_bh, &xv->xr_list,
- 0, 1, NULL, &meta_ac,
- OCFS2_XATTR_VALUE_EXTENT, xv);
+ ret = ocfs2_lock_allocators(inode, &et, 0, 1, NULL, &meta_ac);
if (ret) {
+ ocfs2_put_extent_tree(&et);
mlog_errno(ret);
return ret;
}
@@ -356,8 +358,8 @@ static int __ocfs2_remove_xattr_range(struct inode *inode,
goto out_commit;
}

- ret = ocfs2_remove_extent(inode, root_bh, cpos, len, handle, meta_ac,
- dealloc, OCFS2_XATTR_VALUE_EXTENT, xv);
+ ret = ocfs2_remove_extent(inode, &et, cpos, len, handle, meta_ac,
+ dealloc);
if (ret) {
mlog_errno(ret);
goto out_commit;
@@ -383,6 +385,7 @@ out:
if (meta_ac)
ocfs2_free_alloc_context(meta_ac);

+ ocfs2_put_extent_tree(&et);
return ret;
}

@@ -3622,26 +3625,24 @@ static int ocfs2_add_new_xattr_cluster(struct inode *inode,
struct ocfs2_alloc_context *data_ac = NULL;
struct ocfs2_alloc_context *meta_ac = NULL;
struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
- struct ocfs2_xattr_block *xb =
- (struct ocfs2_xattr_block *)root_bh->b_data;
- struct ocfs2_xattr_tree_root *xb_root = &xb->xb_attrs.xb_root;
- struct ocfs2_extent_list *root_el = &xb_root->xt_list;
- enum ocfs2_extent_tree_type type = OCFS2_XATTR_TREE_EXTENT;
+ struct ocfs2_extent_tree et;

mlog(0, "Add new xattr cluster for %llu, previous xattr hash = %u, "
"previous xattr blkno = %llu\n",
(unsigned long long)OCFS2_I(inode)->ip_blkno,
prev_cpos, prev_blkno);

- ret = ocfs2_lock_allocators(inode, root_bh, root_el,
- clusters_to_add, 0, &data_ac,
- &meta_ac, type, NULL);
+ ocfs2_get_xattr_tree_extent_tree(&et, inode, root_bh);
+
+ ret = ocfs2_lock_allocators(inode, &et, clusters_to_add, 0,
+ &data_ac, &meta_ac);
if (ret) {
mlog_errno(ret);
goto leave;
}

- credits = ocfs2_calc_extend_credits(osb->sb, root_el, clusters_to_add);
+ credits = ocfs2_calc_extend_credits(osb->sb, et.et_root_el,
+ clusters_to_add);
handle = ocfs2_start_trans(osb, credits);
if (IS_ERR(handle)) {
ret = PTR_ERR(handle);
@@ -3705,9 +3706,8 @@ static int ocfs2_add_new_xattr_cluster(struct inode *inode,

mlog(0, "Insert %u clusters at block %llu for xattr at %u\n",
num_bits, block, v_start);
- ret = ocfs2_xattr_tree_insert_extent(osb, handle, inode, root_bh,
- v_start, block, num_bits,
- 0, meta_ac);
+ ret = ocfs2_insert_extent(osb, handle, inode, &et, v_start, block,
+ num_bits, 0, meta_ac);
if (ret < 0) {
mlog_errno(ret);
goto leave;
@@ -3727,6 +3727,7 @@ leave:
if (meta_ac)
ocfs2_free_alloc_context(meta_ac);

+ ocfs2_put_extent_tree(&et);
return ret;
}

@@ -4331,9 +4332,11 @@ static int ocfs2_rm_xattr_cluster(struct inode *inode,
handle_t *handle;
struct ocfs2_xattr_block *xb =
(struct ocfs2_xattr_block *)root_bh->b_data;
- struct ocfs2_extent_list *root_el = &xb->xb_attrs.xb_root.xt_list;
struct ocfs2_alloc_context *meta_ac = NULL;
struct ocfs2_cached_dealloc_ctxt dealloc;
+ struct ocfs2_extent_tree et;
+
+ ocfs2_get_xattr_tree_extent_tree(&et, inode, root_bh);

ocfs2_init_dealloc_ctxt(&dealloc);

@@ -4342,10 +4345,9 @@ static int ocfs2_rm_xattr_cluster(struct inode *inode,

ocfs2_remove_xattr_clusters_from_cache(inode, blkno, len);

- ret = ocfs2_lock_allocators(inode, root_bh, root_el,
- 0, 1, NULL, &meta_ac,
- OCFS2_XATTR_TREE_EXTENT, NULL);
+ ret = ocfs2_lock_allocators(inode, &et, 0, 1, NULL, &meta_ac);
if (ret) {
+ ocfs2_put_extent_tree(&et);
mlog_errno(ret);
return ret;
}
@@ -4374,8 +4376,8 @@ static int ocfs2_rm_xattr_cluster(struct inode *inode,
goto out_commit;
}

- ret = ocfs2_remove_extent(inode, root_bh, cpos, len, handle, meta_ac,
- &dealloc, OCFS2_XATTR_TREE_EXTENT, NULL);
+ ret = ocfs2_remove_extent(inode, &et, cpos, len, handle, meta_ac,
+ &dealloc);
if (ret) {
mlog_errno(ret);
goto out_commit;
@@ -4405,6 +4407,7 @@ out:

ocfs2_run_deallocs(osb, &dealloc);

+ ocfs2_put_extent_tree(&et);
return ret;
}

--
1.5.4.5