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ocfs2: Add xattr index tree operations

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When necessary, an ocfs2_xattr_block will embed an ocfs2_extent_list to
store large numbers of EAs. This patch adds a new type in
ocfs2_extent_tree_type and adds the implementation so that we can re-use the
b-tree code to handle the storage of many EAs.

Signed-off-by: Tao Ma <tao.ma@oracle.com>
Signed-off-by: Mark Fasheh <mfasheh@suse.com>
This commit is contained in:
Tao Ma 2008-08-18 17:38:49 +08:00 committed by Mark Fasheh
parent cf1d6c763f
commit ba492615f0
2 changed files with 99 additions and 0 deletions
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89
fs/ocfs2/alloc.c
View file

@ -177,6 +177,48 @@ static struct ocfs2_extent_tree_operations ocfs2_xattr_et_ops = {
.sanity_check = ocfs2_xattr_value_sanity_check,
};
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->root_bh->b_data;
struct ocfs2_xattr_tree_root *xt = &xb->xb_attrs.xb_root;
xt->xt_last_eb_blk = cpu_to_le64(blkno);
}
static u64 ocfs2_xattr_tree_get_last_eb_blk(struct ocfs2_extent_tree *et)
{
struct ocfs2_xattr_block *xb =
(struct ocfs2_xattr_block *) et->root_bh->b_data;
struct ocfs2_xattr_tree_root *xt = &xb->xb_attrs.xb_root;
return le64_to_cpu(xt->xt_last_eb_blk);
}
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->root_bh->b_data;
le32_add_cpu(&xb->xb_attrs.xb_root.xt_clusters, clusters);
}
static int ocfs2_xattr_tree_sanity_check(struct inode *inode,
struct ocfs2_extent_tree *et)
{
return 0;
}
static struct ocfs2_extent_tree_operations ocfs2_xattr_tree_et_ops = {
.set_last_eb_blk = ocfs2_xattr_tree_set_last_eb_blk,
.get_last_eb_blk = ocfs2_xattr_tree_get_last_eb_blk,
.update_clusters = ocfs2_xattr_tree_update_clusters,
.sanity_check = ocfs2_xattr_tree_sanity_check,
};
static struct ocfs2_extent_tree*
ocfs2_new_extent_tree(struct buffer_head *bh,
enum ocfs2_extent_tree_type et_type,
@ -201,6 +243,11 @@ static struct ocfs2_extent_tree*
(struct ocfs2_xattr_value_root *) private;
et->root_el = &xv->xr_list;
et->eops = &ocfs2_xattr_et_ops;
} else if (et_type == OCFS2_XATTR_TREE_EXTENT) {
struct ocfs2_xattr_block *xb =
(struct ocfs2_xattr_block *)bh->b_data;
et->root_el = &xb->xb_attrs.xb_root.xt_list;
et->eops = &ocfs2_xattr_tree_et_ops;
}
return et;
@ -570,6 +617,12 @@ int ocfs2_num_free_extents(struct ocfs2_super *osb,
last_eb_blk = le64_to_cpu(xv->xr_last_eb_blk);
el = &xv->xr_list;
} else if (type == OCFS2_XATTR_TREE_EXTENT) {
struct ocfs2_xattr_block *xb =
(struct ocfs2_xattr_block *)root_bh->b_data;
last_eb_blk = le64_to_cpu(xb->xb_attrs.xb_root.xt_last_eb_blk);
el = &xb->xb_attrs.xb_root.xt_list;
}
if (last_eb_blk) {
@ -4397,6 +4450,36 @@ bail:
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 = NULL;
et = ocfs2_new_extent_tree(root_bh, OCFS2_XATTR_TREE_EXTENT, NULL);
if (!et) {
status = -ENOMEM;
mlog_errno(status);
goto bail;
}
status = ocfs2_insert_extent(osb, handle, inode, root_bh,
cpos, start_blk, new_clusters,
flags, meta_ac, et);
if (et)
ocfs2_free_extent_tree(et);
bail:
return status;
}
/*
* Allcate and add clusters into the extent b-tree.
* The new clusters(clusters_to_add) will be inserted at logical_offset.
@ -4482,6 +4565,12 @@ int ocfs2_add_clusters_in_btree(struct ocfs2_super *osb,
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,

10
fs/ocfs2/alloc.h
View file

@ -29,6 +29,7 @@
enum ocfs2_extent_tree_type {
OCFS2_DINODE_EXTENT = 0,
OCFS2_XATTR_VALUE_EXTENT,
OCFS2_XATTR_TREE_EXTENT,
};
struct ocfs2_alloc_context;
@ -51,6 +52,15 @@ int ocfs2_xattr_value_insert_extent(struct ocfs2_super *osb,
u8 flags,
struct ocfs2_alloc_context *meta_ac,
void *private);
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);
enum ocfs2_alloc_restarted {
RESTART_NONE = 0,
RESTART_TRANS,