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-rw-r--r--fs/ocfs2/refcounttree.c127
1 files changed, 71 insertions, 56 deletions
diff --git a/fs/ocfs2/refcounttree.c b/fs/ocfs2/refcounttree.c
index 62d21c6ce1d9..40de7bb9e9a6 100644
--- a/fs/ocfs2/refcounttree.c
+++ b/fs/ocfs2/refcounttree.c
@@ -45,12 +45,20 @@ struct ocfs2_cow_context {
struct inode *inode;
u32 cow_start;
u32 cow_len;
- struct ocfs2_extent_tree di_et;
- struct ocfs2_caching_info *ref_ci;
+ struct ocfs2_extent_tree data_et;
+ struct ocfs2_refcount_tree *ref_tree;
struct buffer_head *ref_root_bh;
struct ocfs2_alloc_context *meta_ac;
struct ocfs2_alloc_context *data_ac;
struct ocfs2_cached_dealloc_ctxt dealloc;
+ int (*get_clusters)(struct ocfs2_cow_context *context,
+ u32 v_cluster, u32 *p_cluster,
+ u32 *num_clusters,
+ unsigned int *extent_flags);
+ int (*cow_duplicate_clusters)(handle_t *handle,
+ struct ocfs2_cow_context *context,
+ u32 cpos, u32 old_cluster,
+ u32 new_cluster, u32 new_len);
};
static inline struct ocfs2_refcount_tree *
@@ -2489,7 +2497,7 @@ static inline unsigned int ocfs2_cow_align_length(struct super_block *sb,
* get good I/O from the resulting extent tree.
*/
static int ocfs2_refcount_cal_cow_clusters(struct inode *inode,
- struct buffer_head *di_bh,
+ struct ocfs2_extent_list *el,
u32 cpos,
u32 write_len,
u32 max_cpos,
@@ -2497,8 +2505,6 @@ static int ocfs2_refcount_cal_cow_clusters(struct inode *inode,
u32 *cow_len)
{
int ret = 0;
- struct ocfs2_dinode *di = (struct ocfs2_dinode *) di_bh->b_data;
- struct ocfs2_extent_list *el = &di->id2.i_list;
int tree_height = le16_to_cpu(el->l_tree_depth), i;
struct buffer_head *eb_bh = NULL;
struct ocfs2_extent_block *eb = NULL;
@@ -2769,13 +2775,13 @@ static int ocfs2_clear_cow_buffer(handle_t *handle, struct buffer_head *bh)
return 0;
}
-static int ocfs2_duplicate_clusters(handle_t *handle,
- struct ocfs2_cow_context *context,
- u32 cpos, u32 old_cluster,
- u32 new_cluster, u32 new_len)
+static int ocfs2_duplicate_clusters_by_page(handle_t *handle,
+ struct ocfs2_cow_context *context,
+ u32 cpos, u32 old_cluster,
+ u32 new_cluster, u32 new_len)
{
int ret = 0, partial;
- struct ocfs2_caching_info *ci = context->di_et.et_ci;
+ struct ocfs2_caching_info *ci = context->data_et.et_ci;
struct super_block *sb = ocfs2_metadata_cache_get_super(ci);
u64 new_block = ocfs2_clusters_to_blocks(sb, new_cluster);
struct page *page;
@@ -2909,7 +2915,7 @@ static int ocfs2_replace_clusters(handle_t *handle,
unsigned int ext_flags)
{
int ret;
- struct ocfs2_caching_info *ci = context->di_et.et_ci;
+ struct ocfs2_caching_info *ci = context->data_et.et_ci;
u64 ino = ocfs2_metadata_cache_owner(ci);
mlog(0, "inode %llu, cpos %u, old %u, new %u, len %u, ext_flags %u\n",
@@ -2917,15 +2923,15 @@ static int ocfs2_replace_clusters(handle_t *handle,
/*If the old clusters is unwritten, no need to duplicate. */
if (!(ext_flags & OCFS2_EXT_UNWRITTEN)) {
- ret = ocfs2_duplicate_clusters(handle, context, cpos,
- old, new, len);
+ ret = context->cow_duplicate_clusters(handle, context, cpos,
+ old, new, len);
if (ret) {
mlog_errno(ret);
goto out;
}
}
- ret = ocfs2_clear_ext_refcount(handle, &context->di_et,
+ ret = ocfs2_clear_ext_refcount(handle, &context->data_et,
cpos, new, len, ext_flags,
context->meta_ac, &context->dealloc);
if (ret)
@@ -2983,6 +2989,15 @@ static int ocfs2_cow_sync_writeback(struct super_block *sb,
return ret;
}
+static int ocfs2_di_get_clusters(struct ocfs2_cow_context *context,
+ u32 v_cluster, u32 *p_cluster,
+ u32 *num_clusters,
+ unsigned int *extent_flags)
+{
+ return ocfs2_get_clusters(context->inode, v_cluster, p_cluster,
+ num_clusters, extent_flags);
+}
+
static int ocfs2_make_clusters_writable(struct super_block *sb,
struct ocfs2_cow_context *context,
u32 cpos, u32 p_cluster,
@@ -2994,14 +3009,15 @@ static int ocfs2_make_clusters_writable(struct super_block *sb,
struct ocfs2_super *osb = OCFS2_SB(sb);
handle_t *handle;
struct buffer_head *ref_leaf_bh = NULL;
+ struct ocfs2_caching_info *ref_ci = &context->ref_tree->rf_ci;
struct ocfs2_refcount_rec rec;
mlog(0, "cpos %u, p_cluster %u, num_clusters %u, e_flags %u\n",
cpos, p_cluster, num_clusters, e_flags);
ret = ocfs2_lock_refcount_allocators(sb, p_cluster, num_clusters,
- &context->di_et,
- context->ref_ci,
+ &context->data_et,
+ ref_ci,
context->ref_root_bh,
&context->meta_ac,
&context->data_ac, &credits);
@@ -3018,8 +3034,7 @@ static int ocfs2_make_clusters_writable(struct super_block *sb,
}
while (num_clusters) {
- ret = ocfs2_get_refcount_rec(context->ref_ci,
- context->ref_root_bh,
+ ret = ocfs2_get_refcount_rec(ref_ci, context->ref_root_bh,
p_cluster, num_clusters,
&rec, &index, &ref_leaf_bh);
if (ret) {
@@ -3041,7 +3056,8 @@ static int ocfs2_make_clusters_writable(struct super_block *sb,
*/
if (le32_to_cpu(rec.r_refcount) == 1) {
delete = 0;
- ret = ocfs2_clear_ext_refcount(handle, &context->di_et,
+ ret = ocfs2_clear_ext_refcount(handle,
+ &context->data_et,
cpos, p_cluster,
set_len, e_flags,
context->meta_ac,
@@ -3072,7 +3088,7 @@ static int ocfs2_make_clusters_writable(struct super_block *sb,
set_len = new_len;
}
- ret = __ocfs2_decrease_refcount(handle, context->ref_ci,
+ ret = __ocfs2_decrease_refcount(handle, ref_ci,
context->ref_root_bh,
p_cluster, set_len,
context->meta_ac,
@@ -3114,17 +3130,14 @@ out:
return ret;
}
-static int ocfs2_replace_cow(struct inode *inode,
- struct buffer_head *di_bh,
- struct buffer_head *ref_root_bh,
- struct ocfs2_caching_info *ref_ci,
- u32 cow_start, u32 cow_len)
+static int ocfs2_replace_cow(struct ocfs2_cow_context *context)
{
int ret = 0;
- u32 p_cluster, num_clusters, start = cow_start;
+ struct inode *inode = context->inode;
+ u32 cow_start = context->cow_start, cow_len = context->cow_len;
+ u32 p_cluster, num_clusters;
unsigned int ext_flags;
struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
- struct ocfs2_cow_context *context;
if (!ocfs2_refcount_tree(OCFS2_SB(inode->i_sb))) {
ocfs2_error(inode->i_sb, "Inode %lu want to use refcount "
@@ -3133,26 +3146,11 @@ static int ocfs2_replace_cow(struct inode *inode,
return -EROFS;
}
- context = kzalloc(sizeof(struct ocfs2_cow_context), GFP_NOFS);
- if (!context) {
- ret = -ENOMEM;
- mlog_errno(ret);
- return ret;
- }
-
- context->inode = inode;
- context->cow_start = cow_start;
- context->cow_len = cow_len;
- context->ref_ci = ref_ci;
- context->ref_root_bh = ref_root_bh;
-
ocfs2_init_dealloc_ctxt(&context->dealloc);
- ocfs2_init_dinode_extent_tree(&context->di_et,
- INODE_CACHE(inode), di_bh);
while (cow_len) {
- ret = ocfs2_get_clusters(inode, cow_start, &p_cluster,
- &num_clusters, &ext_flags);
+ ret = context->get_clusters(context, cow_start, &p_cluster,
+ &num_clusters, &ext_flags);
if (ret) {
mlog_errno(ret);
break;
@@ -3175,20 +3173,11 @@ static int ocfs2_replace_cow(struct inode *inode,
cow_start += num_clusters;
}
-
- /*
- * truncate the extent map here since no matter whether we meet with
- * any error during the action, we shouldn't trust cached extent map
- * any more.
- */
- ocfs2_extent_map_trunc(inode, start);
-
if (ocfs2_dealloc_has_cluster(&context->dealloc)) {
ocfs2_schedule_truncate_log_flush(osb, 1);
ocfs2_run_deallocs(osb, &context->dealloc);
}
- kfree(context);
return ret;
}
@@ -3208,10 +3197,11 @@ static int ocfs2_refcount_cow_hunk(struct inode *inode,
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));
- ret = ocfs2_refcount_cal_cow_clusters(inode, di_bh,
+ ret = ocfs2_refcount_cal_cow_clusters(inode, &di->id2.i_list,
cpos, write_len, max_cpos,
&cow_start, &cow_len);
if (ret) {
@@ -3225,6 +3215,13 @@ static int ocfs2_refcount_cow_hunk(struct inode *inode,
BUG_ON(cow_len == 0);
+ context = kzalloc(sizeof(struct ocfs2_cow_context), GFP_NOFS);
+ if (!context) {
+ ret = -ENOMEM;
+ mlog_errno(ret);
+ goto out;
+ }
+
ret = ocfs2_lock_refcount_tree(osb, le64_to_cpu(di->i_refcount_loc),
1, &ref_tree, &ref_root_bh);
if (ret) {
@@ -3232,14 +3229,32 @@ static int ocfs2_refcount_cow_hunk(struct inode *inode,
goto out;
}
- ret = ocfs2_replace_cow(inode, di_bh, ref_root_bh, &ref_tree->rf_ci,
- cow_start, cow_len);
+ context->inode = inode;
+ context->cow_start = cow_start;
+ context->cow_len = cow_len;
+ context->ref_tree = ref_tree;
+ context->ref_root_bh = ref_root_bh;
+ context->cow_duplicate_clusters = ocfs2_duplicate_clusters_by_page;
+ context->get_clusters = ocfs2_di_get_clusters;
+
+ ocfs2_init_dinode_extent_tree(&context->data_et,
+ INODE_CACHE(inode), di_bh);
+
+ ret = ocfs2_replace_cow(context);
if (ret)
mlog_errno(ret);
+ /*
+ * truncate the extent map here since no matter whether we meet with
+ * any error during the action, we shouldn't trust cached extent map
+ * any more.
+ */
+ ocfs2_extent_map_trunc(inode, cow_start);
+
ocfs2_unlock_refcount_tree(osb, ref_tree, 1);
brelse(ref_root_bh);
out:
+ kfree(context);
return ret;
}
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