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-rw-r--r--fs/ocfs2/alloc.c2
-rw-r--r--fs/ocfs2/refcounttree.c104
-rw-r--r--fs/ocfs2/refcounttree.h3
3 files changed, 81 insertions, 28 deletions
diff --git a/fs/ocfs2/alloc.c b/fs/ocfs2/alloc.c
index b8fc95d1063..7c879fc7834 100644
--- a/fs/ocfs2/alloc.c
+++ b/fs/ocfs2/alloc.c
@@ -6974,7 +6974,7 @@ static int ocfs2_do_truncate(struct ocfs2_super *osb,
ocfs2_blocks_to_clusters(osb->sb,
delete_blk),
clusters_to_del, meta_ac,
- &tc->tc_dealloc);
+ &tc->tc_dealloc, 1);
else
status = ocfs2_truncate_log_append(osb, handle,
delete_blk,
diff --git a/fs/ocfs2/refcounttree.c b/fs/ocfs2/refcounttree.c
index 4e7df8b8fd4..0a92436557e 100644
--- a/fs/ocfs2/refcounttree.c
+++ b/fs/ocfs2/refcounttree.c
@@ -2076,7 +2076,8 @@ static int __ocfs2_decrease_refcount(handle_t *handle,
struct buffer_head *ref_root_bh,
u64 cpos, u32 len,
struct ocfs2_alloc_context *meta_ac,
- struct ocfs2_cached_dealloc_ctxt *dealloc)
+ struct ocfs2_cached_dealloc_ctxt *dealloc,
+ int delete)
{
int ret = 0, index = 0;
struct ocfs2_refcount_rec rec;
@@ -2084,9 +2085,10 @@ static int __ocfs2_decrease_refcount(handle_t *handle,
struct super_block *sb = ocfs2_metadata_cache_get_super(ci);
struct buffer_head *ref_leaf_bh = NULL;
- mlog(0, "Tree owner %llu, decrease refcount start %llu, len %u\n",
+ mlog(0, "Tree owner %llu, decrease refcount start %llu, "
+ "len %u, delete %u\n",
(unsigned long long)ocfs2_metadata_cache_owner(ci),
- (unsigned long long)cpos, len);
+ (unsigned long long)cpos, len, delete);
while (len) {
ret = ocfs2_get_refcount_rec(ci, ref_root_bh,
@@ -2099,6 +2101,8 @@ static int __ocfs2_decrease_refcount(handle_t *handle,
r_count = le32_to_cpu(rec.r_refcount);
BUG_ON(r_count == 0);
+ if (!delete)
+ BUG_ON(r_count > 1);
r_len = min((u64)(cpos + len), le64_to_cpu(rec.r_cpos) +
le32_to_cpu(rec.r_clusters)) - cpos;
@@ -2112,7 +2116,7 @@ static int __ocfs2_decrease_refcount(handle_t *handle,
goto out;
}
- if (le32_to_cpu(rec.r_refcount) == 1) {
+ if (le32_to_cpu(rec.r_refcount) == 1 && delete) {
ret = ocfs2_cache_cluster_dealloc(dealloc,
ocfs2_clusters_to_blocks(sb, cpos),
r_len);
@@ -2137,7 +2141,8 @@ out:
int ocfs2_decrease_refcount(struct inode *inode,
handle_t *handle, u32 cpos, u32 len,
struct ocfs2_alloc_context *meta_ac,
- struct ocfs2_cached_dealloc_ctxt *dealloc)
+ struct ocfs2_cached_dealloc_ctxt *dealloc,
+ int delete)
{
int ret;
u64 ref_blkno;
@@ -2167,7 +2172,7 @@ int ocfs2_decrease_refcount(struct inode *inode,
}
ret = __ocfs2_decrease_refcount(handle, &tree->rf_ci, ref_root_bh,
- cpos, len, meta_ac, dealloc);
+ cpos, len, meta_ac, dealloc, delete);
if (ret)
mlog_errno(ret);
out:
@@ -2974,10 +2979,16 @@ static int ocfs2_make_clusters_writable(struct super_block *sb,
u32 cpos, u32 p_cluster,
u32 num_clusters, unsigned int e_flags)
{
- int ret, credits = 0;
+ int ret, delete, index, credits = 0;
u32 new_bit, new_len;
+ unsigned int set_len;
struct ocfs2_super *osb = OCFS2_SB(sb);
handle_t *handle;
+ struct buffer_head *ref_leaf_bh = NULL;
+ 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,
@@ -2998,35 +3009,75 @@ static int ocfs2_make_clusters_writable(struct super_block *sb,
}
while (num_clusters) {
- ret = __ocfs2_claim_clusters(osb, handle, context->data_ac,
- 1, num_clusters,
- &new_bit, &new_len);
+ ret = ocfs2_get_refcount_rec(context->ref_ci,
+ context->ref_root_bh,
+ p_cluster, num_clusters,
+ &rec, &index, &ref_leaf_bh);
if (ret) {
mlog_errno(ret);
goto out_commit;
}
- ret = ocfs2_replace_clusters(handle, context,
- cpos, p_cluster, new_bit,
- new_len, e_flags);
+ BUG_ON(!rec.r_refcount);
+ set_len = min((u64)p_cluster + num_clusters,
+ le64_to_cpu(rec.r_cpos) +
+ le32_to_cpu(rec.r_clusters)) - p_cluster;
+
+ /*
+ * There are many different situation here.
+ * 1. If refcount == 1, remove the flag and don't COW.
+ * 2. If refcount > 1, allocate clusters.
+ * Here we may not allocate r_len once at a time, so continue
+ * until we reach num_clusters.
+ */
+ if (le32_to_cpu(rec.r_refcount) == 1) {
+ delete = 0;
+ ret = ocfs2_clear_ext_refcount(handle, &context->di_et,
+ cpos, p_cluster,
+ set_len, e_flags,
+ context->meta_ac,
+ &context->dealloc);
+ if (ret) {
+ mlog_errno(ret);
+ goto out_commit;
+ }
+ } else {
+ delete = 1;
+
+ ret = __ocfs2_claim_clusters(osb, handle,
+ context->data_ac,
+ 1, set_len,
+ &new_bit, &new_len);
+ if (ret) {
+ mlog_errno(ret);
+ goto out_commit;
+ }
+
+ ret = ocfs2_replace_clusters(handle, context,
+ cpos, p_cluster, new_bit,
+ new_len, e_flags);
+ if (ret) {
+ mlog_errno(ret);
+ goto out_commit;
+ }
+ set_len = new_len;
+ }
+
+ ret = __ocfs2_decrease_refcount(handle, context->ref_ci,
+ context->ref_root_bh,
+ p_cluster, set_len,
+ context->meta_ac,
+ &context->dealloc, delete);
if (ret) {
mlog_errno(ret);
goto out_commit;
}
- cpos += new_len;
- p_cluster += new_len;
- num_clusters -= new_len;
- }
-
- ret = __ocfs2_decrease_refcount(handle, context->ref_ci,
- context->ref_root_bh,
- p_cluster, num_clusters,
- context->meta_ac,
- &context->dealloc);
- if (ret) {
- mlog_errno(ret);
- goto out_commit;
+ cpos += set_len;
+ p_cluster += set_len;
+ num_clusters -= set_len;
+ brelse(ref_leaf_bh);
+ ref_leaf_bh = NULL;
}
/*
@@ -3049,6 +3100,7 @@ out:
ocfs2_free_alloc_context(context->meta_ac);
context->meta_ac = NULL;
}
+ brelse(ref_leaf_bh);
return ret;
}
diff --git a/fs/ocfs2/refcounttree.h b/fs/ocfs2/refcounttree.h
index 9960878134d..a8c15b0b230 100644
--- a/fs/ocfs2/refcounttree.h
+++ b/fs/ocfs2/refcounttree.h
@@ -44,7 +44,8 @@ void ocfs2_unlock_refcount_tree(struct ocfs2_super *osb,
int ocfs2_decrease_refcount(struct inode *inode,
handle_t *handle, u32 cpos, u32 len,
struct ocfs2_alloc_context *meta_ac,
- struct ocfs2_cached_dealloc_ctxt *dealloc);
+ struct ocfs2_cached_dealloc_ctxt *dealloc,
+ int delete);
int ocfs2_prepare_refcount_change_for_del(struct inode *inode,
struct buffer_head *di_bh,
u64 phys_blkno,
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-29 01:34:08 +0000