Replace the open-coded inode refcount flag test with a helper function
to reduce the potential for bugs.
Signed-off-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
---
fs/ocfs2/refcounttree.c | 28 +++++++++++++++-------------
fs/ocfs2/refcounttree.h | 2 ++
2 files changed, 17 insertions(+), 13 deletions(-)
diff --git a/fs/ocfs2/refcounttree.c b/fs/ocfs2/refcounttree.c
index 1923851..59be8f4 100644
--- a/fs/ocfs2/refcounttree.c
+++ b/fs/ocfs2/refcounttree.c
@@ -48,6 +48,12 @@
#include <linux/mount.h>
#include <linux/posix_acl.h>
+/* Does this inode have the reflink flag set? */
+bool ocfs2_is_refcount_inode(struct inode *inode)
+{
+ return (OCFS2_I(inode)->ip_dyn_features & OCFS2_HAS_REFCOUNT_FL);
+}
+
struct ocfs2_cow_context {
struct inode *inode;
u32 cow_start;
@@ -410,7 +416,7 @@ static int ocfs2_get_refcount_block(struct inode *inode, u64 *ref_blkno)
goto out;
}
- BUG_ON(!(OCFS2_I(inode)->ip_dyn_features & OCFS2_HAS_REFCOUNT_FL));
+ BUG_ON(!ocfs2_is_refcount_inode(inode));
di = (struct ocfs2_dinode *)di_bh->b_data;
*ref_blkno = le64_to_cpu(di->i_refcount_loc);
@@ -570,7 +576,7 @@ static int ocfs2_create_refcount_tree(struct inode *inode,
u32 num_got;
u64 suballoc_loc, first_blkno;
- BUG_ON(oi->ip_dyn_features & OCFS2_HAS_REFCOUNT_FL);
+ BUG_ON(ocfs2_is_refcount_inode(inode));
trace_ocfs2_create_refcount_tree(
(unsigned long long)OCFS2_I(inode)->ip_blkno);
@@ -708,7 +714,7 @@ static int ocfs2_set_refcount_tree(struct inode *inode,
struct ocfs2_refcount_block *rb;
struct ocfs2_refcount_tree *ref_tree;
- BUG_ON(oi->ip_dyn_features & OCFS2_HAS_REFCOUNT_FL);
+ BUG_ON(ocfs2_is_refcount_inode(inode));
ret = ocfs2_lock_refcount_tree(osb, refcount_loc, 1,
&ref_tree, &ref_root_bh);
@@ -775,7 +781,7 @@ int ocfs2_remove_refcount_tree(struct inode *inode, struct buffer_head *di_bh)
u64 blk = 0, bg_blkno = 0, ref_blkno = le64_to_cpu(di->i_refcount_loc);
u16 bit = 0;
- if (!(oi->ip_dyn_features & OCFS2_HAS_REFCOUNT_FL))
+ if (!ocfs2_is_refcount_inode(inode))
return 0;
BUG_ON(!ref_blkno);
@@ -2299,11 +2305,10 @@ int ocfs2_decrease_refcount(struct inode *inode,
{
int ret;
u64 ref_blkno;
- struct ocfs2_inode_info *oi = OCFS2_I(inode);
struct buffer_head *ref_root_bh = NULL;
struct ocfs2_refcount_tree *tree;
- BUG_ON(!(oi->ip_dyn_features & OCFS2_HAS_REFCOUNT_FL));
+ BUG_ON(!ocfs2_is_refcount_inode(inode));
ret = ocfs2_get_refcount_block(inode, &ref_blkno);
if (ret) {
@@ -2533,7 +2538,6 @@ int ocfs2_prepare_refcount_change_for_del(struct inode *inode,
int *ref_blocks)
{
int ret;
- struct ocfs2_inode_info *oi = OCFS2_I(inode);
struct buffer_head *ref_root_bh = NULL;
struct ocfs2_refcount_tree *tree;
u64 start_cpos = ocfs2_blocks_to_clusters(inode->i_sb, phys_blkno);
@@ -2544,7 +2548,7 @@ int ocfs2_prepare_refcount_change_for_del(struct inode *inode,
goto out;
}
- BUG_ON(!(oi->ip_dyn_features & OCFS2_HAS_REFCOUNT_FL));
+ BUG_ON(!ocfs2_is_refcount_inode(inode));
ret = ocfs2_get_refcount_tree(OCFS2_SB(inode->i_sb),
refcount_loc, &tree);
@@ -3412,14 +3416,13 @@ static int ocfs2_refcount_cow_hunk(struct inode *inode,
{
int ret;
u32 cow_start = 0, cow_len = 0;
- struct ocfs2_inode_info *oi = OCFS2_I(inode);
struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
struct buffer_head *ref_root_bh = NULL;
struct ocfs2_refcount_tree *ref_tree;
struct ocfs2_cow_context *context = NULL;
- BUG_ON(!(oi->ip_dyn_features & OCFS2_HAS_REFCOUNT_FL));
+ BUG_ON(!ocfs2_is_refcount_inode(inode));
ret = ocfs2_refcount_cal_cow_clusters(inode, &di->id2.i_list,
cpos, write_len, max_cpos,
@@ -3629,11 +3632,10 @@ int ocfs2_refcount_cow_xattr(struct inode *inode,
{
int ret;
struct ocfs2_xattr_value_root *xv = vb->vb_xv;
- struct ocfs2_inode_info *oi = OCFS2_I(inode);
struct ocfs2_cow_context *context = NULL;
u32 cow_start, cow_len;
- BUG_ON(!(oi->ip_dyn_features & OCFS2_HAS_REFCOUNT_FL));
+ BUG_ON(!ocfs2_is_refcount_inode(inode));
ret = ocfs2_refcount_cal_cow_clusters(inode, &xv->xr_list,
cpos, write_len, UINT_MAX,
@@ -3807,7 +3809,7 @@ static int ocfs2_attach_refcount_tree(struct inode *inode,
ocfs2_init_dealloc_ctxt(&dealloc);
- if (!(oi->ip_dyn_features & OCFS2_HAS_REFCOUNT_FL)) {
+ if (!ocfs2_is_refcount_inode(inode)) {
ret = ocfs2_create_refcount_tree(inode, di_bh);
if (ret) {
mlog_errno(ret);
diff --git a/fs/ocfs2/refcounttree.h b/fs/ocfs2/refcounttree.h
index 6422bbc..553edfb 100644
--- a/fs/ocfs2/refcounttree.h
+++ b/fs/ocfs2/refcounttree.h
@@ -17,6 +17,8 @@
#ifndef OCFS2_REFCOUNTTREE_H
#define OCFS2_REFCOUNTTREE_H
+bool ocfs2_is_refcount_inode(struct inode *inode);
+
struct ocfs2_refcount_tree {
struct rb_node rf_node;
u64 rf_blkno;
--
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