[Ocfs2-devel] [PATCH 35/39] ocfs2: Add reflink support for xattr.
Tao Ma
tao.ma at oracle.com
Wed Apr 29 15:58:47 PDT 2009
Signed-off-by: Tao Ma <tao.ma at oracle.com>
---
fs/ocfs2/refcounttree.c | 36 ++-
fs/ocfs2/refcounttree.h | 6 +
fs/ocfs2/xattr.c | 889 +++++++++++++++++++++++++++++++++++++++++++++++
fs/ocfs2/xattr.h | 4 +
4 files changed, 922 insertions(+), 13 deletions(-)
diff --git a/fs/ocfs2/refcounttree.c b/fs/ocfs2/refcounttree.c
index b986c7c..4d86659 100644
--- a/fs/ocfs2/refcounttree.c
+++ b/fs/ocfs2/refcounttree.c
@@ -1307,12 +1307,12 @@ out:
return ret;
}
-static int __ocfs2_increase_refcount(handle_t *handle,
- struct ocfs2_caching_info *ci,
- struct buffer_head *ref_root_bh,
- u64 cpos, u32 len,
- struct ocfs2_alloc_context *meta_ac,
- struct ocfs2_cached_dealloc_ctxt *dealloc)
+int ocfs2_increase_refcount(handle_t *handle,
+ struct ocfs2_caching_info *ci,
+ struct buffer_head *ref_root_bh,
+ u64 cpos, u32 len,
+ struct ocfs2_alloc_context *meta_ac,
+ struct ocfs2_cached_dealloc_ctxt *dealloc)
{
int ret = 0, index;
struct buffer_head *ref_leaf_bh = NULL;
@@ -2879,9 +2879,9 @@ int ocfs2_add_refcount_flag(struct inode *inode,
goto out_commit;
}
- ret = __ocfs2_increase_refcount(handle, ref_ci, ref_root_bh,
- p_cluster, num_clusters,
- meta_ac, dealloc);
+ ret = ocfs2_increase_refcount(handle, ref_ci, ref_root_bh,
+ p_cluster, num_clusters,
+ meta_ac, dealloc);
if (ret) {
mlog_errno(ret);
goto out_commit;
@@ -3026,9 +3026,9 @@ static int ocfs2_add_refcounted_extent(struct inode *inode,
goto out_commit;
}
- ret = __ocfs2_increase_refcount(handle, ref_ci, ref_root_bh,
- p_cluster, num_clusters,
- meta_ac, dealloc);
+ ret = ocfs2_increase_refcount(handle, ref_ci, ref_root_bh,
+ p_cluster, num_clusters,
+ meta_ac, dealloc);
if (ret)
mlog_errno(ret);
@@ -3200,9 +3200,17 @@ static int __ocfs2_reflink(struct dentry *old_dentry,
}
ret = ocfs2_create_reflink_node(inode, old_bh, new_inode, new_bh);
- if (ret)
+ if (ret) {
mlog_errno(ret);
+ goto inode_unlock;
+ }
+ if (OCFS2_I(inode)->ip_dyn_features & OCFS2_HAS_XATTR_FL) {
+ ret = ocfs2_reflink_xattrs(inode, old_bh, new_inode, new_bh);
+ if (ret)
+ mlog_errno(ret);
+ }
+inode_unlock:
ocfs2_inode_unlock(new_inode, 1);
brelse(new_bh);
out_unlock:
@@ -3270,12 +3278,14 @@ static int ocfs2_vfs_reflink(struct dentry *old_dentry,
goto out_unlock;
}
+ down_write(&OCFS2_I(inode)->ip_xattr_sem);
down_write(&OCFS2_I(inode)->ip_alloc_sem);
vfs_dq_init(dir);
error = __ocfs2_reflink(old_dentry, old_bh, new_orphan_inode);
up_write(&OCFS2_I(inode)->ip_alloc_sem);
if (error)
mlog_errno(error);
+ up_write(&OCFS2_I(inode)->ip_xattr_sem);
ocfs2_inode_unlock(inode, 1);
brelse(old_bh);
diff --git a/fs/ocfs2/refcounttree.h b/fs/ocfs2/refcounttree.h
index 014aaab..f796118 100644
--- a/fs/ocfs2/refcounttree.h
+++ b/fs/ocfs2/refcounttree.h
@@ -109,4 +109,10 @@ int ocfs2_add_refcount_flag(struct inode *inode,
u32 cpos, u32 p_cluster, u32 num_clusters,
struct ocfs2_cached_dealloc_ctxt *dealloc,
struct ocfs2_post_refcount *post);
+int ocfs2_increase_refcount(handle_t *handle,
+ struct ocfs2_caching_info *ci,
+ struct buffer_head *ref_root_bh,
+ u64 cpos, u32 len,
+ struct ocfs2_alloc_context *meta_ac,
+ struct ocfs2_cached_dealloc_ctxt *dealloc);
#endif /* OCFS2_REFCOUNTTREE_H */
diff --git a/fs/ocfs2/xattr.c b/fs/ocfs2/xattr.c
index 9876559..c3a79fb 100644
--- a/fs/ocfs2/xattr.c
+++ b/fs/ocfs2/xattr.c
@@ -5875,6 +5875,895 @@ out:
}
/*
+ * Store the information we need in xattr reflink.
+ * old_bh and new_bh are inode bh for the old and new inode.
+ */
+struct ocfs2_xattr_reflink {
+ struct inode *old_inode;
+ struct inode *new_inode;
+ struct buffer_head *old_bh;
+ struct buffer_head *new_bh;
+ struct ocfs2_caching_info *ref_ci;
+ struct buffer_head *ref_root_bh;
+ struct ocfs2_cached_dealloc_ctxt *dealloc;
+};
+
+/*
+ * Given a xattr header and xe offset,
+ * return the proper xv and the corresponding bh.
+ * xattr in inode, block and xattr tree have different implementaions.
+ */
+typedef int (get_xattr_value_root)(struct super_block *sb,
+ struct buffer_head *bh,
+ struct ocfs2_xattr_header *xh,
+ int offset,
+ struct ocfs2_xattr_value_root **xv,
+ struct buffer_head **ret_bh,
+ void *para);
+
+/*
+ * Calculate all the xattr value root metadata stored in this xattr header and
+ * credits we need if we create them from the scratch.
+ * We use get_xattr_value_root so that all types of xattr container can use it.
+ */
+static int ocfs2_value_metas_in_xattr_header(struct super_block *sb,
+ struct buffer_head *bh,
+ struct ocfs2_xattr_header *xh,
+ int *metas, int *credits,
+ get_xattr_value_root *func,
+ void *para)
+{
+ int i, ret = 0;
+ struct ocfs2_xattr_value_root *xv;
+ struct ocfs2_xattr_entry *xe;
+
+ for (i = 0; i < le16_to_cpu(xh->xh_count); i++) {
+ xe = &xh->xh_entries[i];
+ if (ocfs2_xattr_is_local(xe))
+ continue;
+
+ ret = func(sb, bh, xh, i, &xv, NULL, para);
+ if (ret) {
+ mlog_errno(ret);
+ break;
+ }
+
+ *metas += le16_to_cpu(xv->xr_list.l_tree_depth) *
+ le16_to_cpu(xv->xr_list.l_next_free_rec);
+
+ *credits += ocfs2_calc_extend_credits(sb,
+ &def_xv.xv.xr_list,
+ le32_to_cpu(xv->xr_clusters));
+ }
+
+ return ret;
+}
+
+/* Used by xattr inode and block to return the right xv and buffer_head. */
+static int ocfs2_get_xattr_value_root(struct super_block *sb,
+ struct buffer_head *bh,
+ struct ocfs2_xattr_header *xh,
+ int offset,
+ struct ocfs2_xattr_value_root **xv,
+ struct buffer_head **ret_bh,
+ void *para)
+{
+ struct ocfs2_xattr_entry *xe = &xh->xh_entries[offset];
+
+ *xv = (struct ocfs2_xattr_value_root *)((void *)xh +
+ le16_to_cpu(xe->xe_name_offset) +
+ OCFS2_XATTR_SIZE(xe->xe_name_len));
+
+ if (ret_bh)
+ *ret_bh = bh;
+
+ return 0;
+}
+
+/*
+ * Lock the meta_ac and caculate how much credits we need for reflink xattrs.
+ * It is only used for inline xattr and xattr block.
+ */
+static int ocfs2_reflink_lock_xattr_allocators(struct ocfs2_super *osb,
+ struct ocfs2_xattr_header *xh,
+ struct buffer_head *ref_root_bh,
+ int *credits,
+ struct ocfs2_alloc_context **meta_ac)
+{
+ int ret, meta_add = 0;
+ struct ocfs2_refcount_block *rb =
+ (struct ocfs2_refcount_block *)ref_root_bh->b_data;
+
+ *credits = 0;
+
+ ret = ocfs2_value_metas_in_xattr_header(osb->sb, NULL, xh,
+ &meta_add, credits,
+ ocfs2_get_xattr_value_root,
+ NULL);
+ if (ret) {
+ mlog_errno(ret);
+ goto out;
+ }
+ /*
+ * We have to add credits for modifying all the metadata in the
+ * refount tree.
+ */
+ if (le32_to_cpu(rb->rf_flags) & OCFS2_REFCOUNT_TREE_FL)
+ *credits += le16_to_cpu(rb->rf_list.l_tree_depth) *
+ le16_to_cpu(rb->rf_list.l_next_free_rec) + 1;
+ else
+ *credits += 1;
+
+ ret = ocfs2_reserve_new_metadata_blocks(osb, meta_add, meta_ac);
+ if (ret)
+ mlog_errno(ret);
+
+out:
+ return ret;
+}
+
+/*
+ * Given a xattr header, reflink all the xattrs in this container.
+ * It can be used for inode, block and bucket.
+ *
+ * NOTE:
+ * Before we call this function, the caller has memcpy the xattr in
+ * old_xh to the new_xh.
+ */
+static int ocfs2_reflink_xattr_header(handle_t *handle,
+ struct ocfs2_xattr_reflink *args,
+ struct buffer_head *old_bh,
+ struct ocfs2_xattr_header *xh,
+ struct buffer_head *new_bh,
+ struct ocfs2_xattr_header *new_xh,
+ struct ocfs2_xattr_value_buf *vb,
+ struct ocfs2_alloc_context *meta_ac,
+ get_xattr_value_root *func,
+ void *para)
+{
+ int ret = 0, i;
+ struct super_block *sb = args->old_inode->i_sb;
+ struct buffer_head *value_bh;
+ struct ocfs2_xattr_entry *xe;
+ struct ocfs2_xattr_value_root *xv, *new_xv;
+ struct ocfs2_extent_tree data_et;
+ u32 clusters, cpos, p_cluster, num_clusters;
+ unsigned int ext_flags = 0;
+
+ mlog(0, "reflink xattr in container %llu, count = %u\n",
+ (unsigned long long)old_bh->b_blocknr, le16_to_cpu(xh->xh_count));
+ for (i = 0; i < le16_to_cpu(xh->xh_count); i++) {
+ xe = &xh->xh_entries[i];
+
+ if (ocfs2_xattr_is_local(xe))
+ continue;
+
+ ret = func(sb, old_bh, xh, i, &xv, NULL, para);
+ if (ret) {
+ mlog_errno(ret);
+ break;
+ }
+
+ ret = func(sb, new_bh, new_xh, i, &new_xv, &value_bh, para);
+ if (ret) {
+ mlog_errno(ret);
+ break;
+ }
+
+ /*
+ * For the xattr which has l_tree_depth = 0, all the extent
+ * recs have already be copied to the new xh with the
+ * propriate OCFS2_EXT_REFCOUNTED flag we just need to
+ * increase the refount count int the refcount tree.
+ *
+ * For the xattr which has l_tree_depth > 0, we need
+ * to initialize it to the empty default value root,
+ * and then insert the extents one by one.
+ */
+ if (xv->xr_list.l_tree_depth) {
+ memcpy(new_xv, &def_xv, sizeof(def_xv));
+ vb->vb_xv = new_xv;
+ vb->vb_bh = value_bh;
+ ocfs2_init_xattr_value_extent_tree(&data_et,
+ INODE_CACHE(args->new_inode), vb);
+ }
+
+ clusters = le32_to_cpu(xv->xr_clusters);
+ cpos = 0;
+ while (cpos < clusters) {
+ ret = ocfs2_xattr_get_clusters(args->old_inode,
+ cpos,
+ &p_cluster,
+ &num_clusters,
+ &xv->xr_list,
+ &ext_flags);
+ if (ret) {
+ mlog_errno(ret);
+ goto out;
+ }
+
+ BUG_ON(!p_cluster);
+
+ if (xv->xr_list.l_tree_depth) {
+ ret = ocfs2_insert_extent(handle,
+ &data_et, cpos,
+ ocfs2_clusters_to_blocks(
+ args->old_inode->i_sb,
+ p_cluster),
+ num_clusters, ext_flags,
+ meta_ac);
+ if (ret) {
+ mlog_errno(ret);
+ goto out;
+ }
+ }
+
+ ret = ocfs2_increase_refcount(handle, args->ref_ci,
+ args->ref_root_bh,
+ p_cluster, num_clusters,
+ meta_ac, args->dealloc);
+ if (ret) {
+ mlog_errno(ret);
+ goto out;
+ }
+
+ cpos += num_clusters;
+ }
+ }
+
+out:
+ return ret;
+}
+
+static int ocfs2_reflink_xattr_inline(struct ocfs2_xattr_reflink *args)
+{
+ int ret = 0, credits = 0;
+ handle_t *handle;
+ struct ocfs2_super *osb = OCFS2_SB(args->old_inode->i_sb);
+ struct ocfs2_dinode *di = (struct ocfs2_dinode *)args->old_bh->b_data;
+ int inline_size = le16_to_cpu(di->i_xattr_inline_size);
+ int header_off = osb->sb->s_blocksize - inline_size;
+ struct ocfs2_xattr_header *xh = (struct ocfs2_xattr_header *)
+ (args->old_bh->b_data + header_off);
+ struct ocfs2_xattr_header *new_xh = (struct ocfs2_xattr_header *)
+ (args->new_bh->b_data + header_off);
+ struct ocfs2_alloc_context *meta_ac = NULL;
+ struct ocfs2_inode_info *new_oi;
+ struct ocfs2_dinode *new_di;
+ struct ocfs2_xattr_value_buf vb = {
+ .vb_bh = args->new_bh,
+ .vb_access = ocfs2_journal_access_di,
+ };
+
+ ret = ocfs2_reflink_lock_xattr_allocators(osb, xh, args->ref_root_bh,
+ &credits, &meta_ac);
+ if (ret) {
+ mlog_errno(ret);
+ goto out;
+ }
+
+ handle = ocfs2_start_trans(osb, credits);
+ if (IS_ERR(handle)) {
+ ret = PTR_ERR(handle);
+ mlog_errno(ret);
+ goto out;
+ }
+
+ ret = ocfs2_journal_access_di(handle, INODE_CACHE(args->new_inode),
+ args->new_bh, OCFS2_JOURNAL_ACCESS_WRITE);
+ if (ret) {
+ mlog_errno(ret);
+ goto out_commit;
+ }
+
+ memcpy(args->new_bh->b_data + header_off,
+ args->old_bh->b_data + header_off, inline_size);
+
+ new_di = (struct ocfs2_dinode *)args->new_bh->b_data;
+ new_di->i_xattr_inline_size = cpu_to_le16(inline_size);
+
+ ret = ocfs2_reflink_xattr_header(handle, args, args->old_bh, xh,
+ args->new_bh, new_xh, &vb, meta_ac,
+ ocfs2_get_xattr_value_root, NULL);
+ if (ret) {
+ mlog_errno(ret);
+ goto out_commit;
+ }
+
+ new_oi = OCFS2_I(args->new_inode);
+ spin_lock(&new_oi->ip_lock);
+ new_oi->ip_dyn_features |= OCFS2_HAS_XATTR_FL | OCFS2_INLINE_XATTR_FL;
+ new_di->i_dyn_features = cpu_to_le16(new_oi->ip_dyn_features);
+ spin_unlock(&new_oi->ip_lock);
+
+ ocfs2_journal_dirty(handle, args->new_bh);
+
+out_commit:
+ ocfs2_commit_trans(osb, handle);
+
+out:
+ if (meta_ac)
+ ocfs2_free_alloc_context(meta_ac);
+ return ret;
+}
+
+static int ocfs2_create_empty_xattr_block(struct inode *inode,
+ struct buffer_head *fe_bh,
+ struct buffer_head **ret_bh,
+ int indexed)
+{
+ int ret;
+ handle_t *handle;
+ struct ocfs2_alloc_context *meta_ac;
+ struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
+
+ ret = ocfs2_reserve_new_metadata_blocks(osb, 1, &meta_ac);
+ if (ret < 0) {
+ mlog_errno(ret);
+ return ret;
+ }
+
+ handle = ocfs2_start_trans(osb, OCFS2_XATTR_BLOCK_CREATE_CREDITS);
+ if (IS_ERR(handle)) {
+ ret = PTR_ERR(handle);
+ mlog_errno(ret);
+ goto out;
+ }
+
+ mlog(0, "create new xattr block for inode %llu, index = %d\n",
+ (unsigned long long)fe_bh->b_blocknr, indexed);
+ ret = ocfs2_create_xattr_block(handle, inode, fe_bh,
+ meta_ac, ret_bh, indexed);
+ if (ret)
+ mlog_errno(ret);
+
+ ocfs2_commit_trans(osb, handle);
+out:
+ ocfs2_free_alloc_context(meta_ac);
+ return ret;
+}
+
+static int ocfs2_reflink_xattr_block(struct ocfs2_xattr_reflink *args,
+ struct buffer_head *blk_bh,
+ struct buffer_head *new_blk_bh)
+{
+ int ret = 0, credits = 0;
+ handle_t *handle;
+ struct ocfs2_inode_info *new_oi = OCFS2_I(args->new_inode);
+ struct ocfs2_dinode *new_di;
+ struct ocfs2_super *osb = OCFS2_SB(args->new_inode->i_sb);
+ int header_off = offsetof(struct ocfs2_xattr_block, xb_attrs.xb_header);
+ struct ocfs2_xattr_block *xb =
+ (struct ocfs2_xattr_block *)blk_bh->b_data;
+ struct ocfs2_xattr_header *xh = &xb->xb_attrs.xb_header;
+ struct ocfs2_xattr_block *new_xb =
+ (struct ocfs2_xattr_block *)new_blk_bh->b_data;
+ struct ocfs2_xattr_header *new_xh = &new_xb->xb_attrs.xb_header;
+ struct ocfs2_alloc_context *meta_ac;
+ struct ocfs2_xattr_value_buf vb = {
+ .vb_bh = new_blk_bh,
+ .vb_access = ocfs2_journal_access_xb,
+ };
+
+ ret = ocfs2_reflink_lock_xattr_allocators(osb, xh, args->ref_root_bh,
+ &credits, &meta_ac);
+ if (ret) {
+ mlog_errno(ret);
+ return ret;
+ }
+
+ /* One more credits in case we need to add xattr flags in new inode. */
+ handle = ocfs2_start_trans(osb, credits + 1);
+ if (IS_ERR(handle)) {
+ ret = PTR_ERR(handle);
+ mlog_errno(ret);
+ goto out;
+ }
+
+ if (!(new_oi->ip_dyn_features & OCFS2_HAS_XATTR_FL)) {
+ ret = ocfs2_journal_access_di(handle,
+ INODE_CACHE(args->new_inode),
+ args->new_bh,
+ OCFS2_JOURNAL_ACCESS_WRITE);
+ if (ret) {
+ mlog_errno(ret);
+ goto out_commit;
+ }
+ }
+
+ ret = ocfs2_journal_access_xb(handle, INODE_CACHE(args->new_inode),
+ new_blk_bh, OCFS2_JOURNAL_ACCESS_WRITE);
+ if (ret) {
+ mlog_errno(ret);
+ goto out_commit;
+ }
+
+ memcpy(new_blk_bh->b_data + header_off, blk_bh->b_data + header_off,
+ osb->sb->s_blocksize - header_off);
+
+ ret = ocfs2_reflink_xattr_header(handle, args, blk_bh, xh,
+ new_blk_bh, new_xh, &vb, meta_ac,
+ ocfs2_get_xattr_value_root, NULL);
+ if (ret) {
+ mlog_errno(ret);
+ goto out_commit;
+ }
+
+ ocfs2_journal_dirty(handle, new_blk_bh);
+
+ if (!(new_oi->ip_dyn_features & OCFS2_HAS_XATTR_FL)) {
+ new_di = (struct ocfs2_dinode *)args->new_bh->b_data;
+ spin_lock(&new_oi->ip_lock);
+ new_oi->ip_dyn_features |= OCFS2_HAS_XATTR_FL;
+ new_di->i_dyn_features = cpu_to_le16(new_oi->ip_dyn_features);
+ spin_unlock(&new_oi->ip_lock);
+
+ ocfs2_journal_dirty(handle, args->new_bh);
+ }
+
+out_commit:
+ ocfs2_commit_trans(osb, handle);
+
+out:
+ ocfs2_free_alloc_context(meta_ac);
+ return ret;
+}
+
+struct ocfs2_reflink_xattr_tree_args {
+ struct ocfs2_xattr_reflink *reflink;
+ struct buffer_head *old_blk_bh;
+ struct buffer_head *new_blk_bh;
+ struct ocfs2_xattr_bucket *old_bucket;
+ struct ocfs2_xattr_bucket *new_bucket;
+};
+
+/*
+ * NOTE:
+ * We have to handle the case that both old bucket and new bucket
+ * will call this function to get the right ret_bh.
+ * So The caller must give us the right bh.
+ */
+static int ocfs2_get_reflink_xattr_value_root(struct super_block *sb,
+ struct buffer_head *bh,
+ struct ocfs2_xattr_header *xh,
+ int offset,
+ struct ocfs2_xattr_value_root **xv,
+ struct buffer_head **ret_bh,
+ void *para)
+{
+ struct ocfs2_reflink_xattr_tree_args *args =
+ (struct ocfs2_reflink_xattr_tree_args *)para;
+ struct ocfs2_xattr_bucket *bucket;
+
+ if (bh == args->old_bucket->bu_bhs[0])
+ bucket = args->old_bucket;
+ else
+ bucket = args->new_bucket;
+
+ return ocfs2_get_xattr_tree_value_root(sb, bucket, offset,
+ xv, ret_bh);
+}
+
+struct ocfs2_value_tree_metas {
+ int num_metas;
+ int credits;
+};
+
+static int ocfs2_value_tree_metas_in_bucket(struct super_block *sb,
+ struct buffer_head *bh,
+ struct ocfs2_xattr_header *xh,
+ int offset,
+ struct ocfs2_xattr_value_root **xv,
+ struct buffer_head **ret_bh,
+ void *para)
+{
+ struct ocfs2_xattr_bucket *bucket =
+ (struct ocfs2_xattr_bucket *)para;
+
+ return ocfs2_get_xattr_tree_value_root(sb, bucket, offset,
+ xv, ret_bh);
+}
+
+static int ocfs2_calc_value_tree_metas(struct inode *inode,
+ struct ocfs2_xattr_bucket *bucket,
+ void *para)
+{
+ struct ocfs2_value_tree_metas *metas =
+ (struct ocfs2_value_tree_metas *)para;
+ struct ocfs2_xattr_header *xh =
+ (struct ocfs2_xattr_header *)bucket->bu_bhs[0]->b_data;
+
+ /* Add the credits for this bucket first. */
+ metas->credits += bucket->bu_blocks;
+ return ocfs2_value_metas_in_xattr_header(inode->i_sb, bucket->bu_bhs[0],
+ xh, &metas->num_metas,
+ &metas->credits,
+ ocfs2_value_tree_metas_in_bucket,
+ bucket);
+}
+
+/*
+ * Given a xattr extent rec starting from blkno and having len clusters,
+ * iterate all the buckets calculate how much metadata we need for reflinking
+ * all the ocfs2_xattr_value_root and lock the allocators accordingly.
+ */
+static int ocfs2_lock_reflink_xattr_rec_allocators(
+ struct ocfs2_reflink_xattr_tree_args *args,
+ struct ocfs2_extent_tree *xt_et,
+ u64 blkno, u32 len, int *credits,
+ struct ocfs2_alloc_context **meta_ac,
+ struct ocfs2_alloc_context **data_ac)
+{
+ int ret, num_free_extents;
+ struct ocfs2_value_tree_metas metas;
+ struct ocfs2_super *osb = OCFS2_SB(args->reflink->old_inode->i_sb);
+ struct ocfs2_refcount_block *rb;
+
+ memset(&metas, 0, sizeof(metas));
+
+ ret = ocfs2_iterate_xattr_buckets(args->reflink->old_inode, blkno, len,
+ ocfs2_calc_value_tree_metas, &metas);
+ if (ret) {
+ mlog_errno(ret);
+ goto out;
+ }
+
+ rb = (struct ocfs2_refcount_block *)args->reflink->ref_root_bh->b_data;
+ /*
+ * We have to add credits for modifying all the metadata in the
+ * refount tree. We have to touch the root refcount block and
+ * the refcount leaf block if necessary.
+ */
+ *credits = metas.credits + 1;
+ if (le32_to_cpu(rb->rf_flags) & OCFS2_REFCOUNT_TREE_FL)
+ *credits += le16_to_cpu(rb->rf_list.l_tree_depth) *
+ le16_to_cpu(rb->rf_list.l_next_free_rec);
+
+ /* count in the xattr tree change. */
+ num_free_extents = ocfs2_num_free_extents(osb, xt_et);
+ if (num_free_extents < 0) {
+ ret = num_free_extents;
+ mlog_errno(ret);
+ goto out;
+ }
+
+ if (num_free_extents < len)
+ metas.num_metas += ocfs2_extend_meta_needed(xt_et->et_root_el);
+
+ *credits += ocfs2_calc_extend_credits(osb->sb,
+ xt_et->et_root_el, len);
+
+ if (metas.num_metas) {
+ ret = ocfs2_reserve_new_metadata_blocks(osb, metas.num_metas,
+ meta_ac);
+ if (ret) {
+ mlog_errno(ret);
+ goto out;
+ }
+ }
+
+ if (len) {
+ ret = ocfs2_reserve_clusters(osb, len, data_ac);
+ if (ret)
+ mlog_errno(ret);
+ }
+out:
+ if (ret) {
+ if (*meta_ac) {
+ ocfs2_free_alloc_context(*meta_ac);
+ meta_ac = NULL;
+ }
+ }
+
+ return ret;
+}
+
+static int ocfs2_reflink_xattr_buckets(handle_t *handle,
+ u64 blkno, u64 new_blkno, u32 clusters,
+ struct ocfs2_alloc_context *meta_ac,
+ struct ocfs2_alloc_context *data_ac,
+ struct ocfs2_reflink_xattr_tree_args *args)
+{
+ int i, j, ret = 0;
+ struct super_block *sb = args->reflink->old_inode->i_sb;
+ u32 bpc = ocfs2_xattr_buckets_per_cluster(OCFS2_SB(sb));
+ u32 num_buckets = clusters * bpc;
+ int bpb = args->old_bucket->bu_blocks;
+ struct ocfs2_xattr_value_buf vb = {
+ .vb_access = ocfs2_journal_access,
+ };
+
+ for (i = 0; i < num_buckets; i++, blkno += bpb, new_blkno += bpb) {
+ ret = ocfs2_read_xattr_bucket(args->old_bucket, blkno);
+ if (ret) {
+ mlog_errno(ret);
+ break;
+ }
+
+ ret = ocfs2_init_xattr_bucket(args->new_bucket, new_blkno);
+ if (ret) {
+ mlog_errno(ret);
+ break;
+ }
+
+ /*
+ * The real bucket num in this series of blocks is stored
+ * in the 1st bucket.
+ */
+ if (i == 0)
+ num_buckets = le16_to_cpu(
+ bucket_xh(args->old_bucket)->xh_num_buckets);
+
+ ret = ocfs2_xattr_bucket_journal_access(handle,
+ args->new_bucket,
+ OCFS2_JOURNAL_ACCESS_CREATE);
+ if (ret) {
+ mlog_errno(ret);
+ break;
+ }
+
+ for (j = 0; j < bpb; j++)
+ memcpy(bucket_block(args->new_bucket, j),
+ bucket_block(args->old_bucket, j),
+ sb->s_blocksize);
+
+ ocfs2_xattr_bucket_journal_dirty(handle, args->new_bucket);
+
+ ret = ocfs2_reflink_xattr_header(handle, args->reflink,
+ args->old_bucket->bu_bhs[0],
+ bucket_xh(args->old_bucket),
+ args->new_bucket->bu_bhs[0],
+ bucket_xh(args->new_bucket),
+ &vb, meta_ac,
+ ocfs2_get_reflink_xattr_value_root,
+ args);
+ if (ret) {
+ mlog_errno(ret);
+ break;
+ }
+
+ /*
+ * Re-access and dirty the bucket to calculate metaecc.
+ * Because we may extend the transaction in reflink_xattr_header
+ * which will let the already accessed block gone.
+ */
+ ret = ocfs2_xattr_bucket_journal_access(handle,
+ args->new_bucket,
+ OCFS2_JOURNAL_ACCESS_WRITE);
+ if (ret) {
+ mlog_errno(ret);
+ break;
+ }
+
+ ocfs2_xattr_bucket_journal_dirty(handle, args->new_bucket);
+ ocfs2_xattr_bucket_relse(args->old_bucket);
+ ocfs2_xattr_bucket_relse(args->new_bucket);
+ }
+
+ ocfs2_xattr_bucket_relse(args->old_bucket);
+ ocfs2_xattr_bucket_relse(args->new_bucket);
+ return ret;
+}
+/*
+ * Create the same xattr extent record in the new inode's xattr tree.
+ */
+static int ocfs2_reflink_xattr_rec(struct inode *inode,
+ struct buffer_head *root_bh,
+ u64 blkno,
+ u32 cpos,
+ u32 len,
+ void *para)
+{
+ int ret, credits = 0;
+ u32 p_cluster, num_clusters;
+ u64 new_blkno;
+ handle_t *handle;
+ struct ocfs2_reflink_xattr_tree_args *args =
+ (struct ocfs2_reflink_xattr_tree_args *)para;
+ struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
+ struct ocfs2_alloc_context *meta_ac = NULL;
+ struct ocfs2_alloc_context *data_ac = NULL;
+ struct ocfs2_extent_tree et;
+
+ ocfs2_init_xattr_tree_extent_tree(&et,
+ INODE_CACHE(args->reflink->new_inode),
+ args->new_blk_bh);
+
+ ret = ocfs2_lock_reflink_xattr_rec_allocators(args, &et, blkno,
+ len, &credits,
+ &meta_ac, &data_ac);
+ if (ret) {
+ mlog_errno(ret);
+ goto out;
+ }
+
+ handle = ocfs2_start_trans(osb, credits);
+ if (IS_ERR(handle)) {
+ ret = PTR_ERR(handle);
+ mlog_errno(ret);
+ goto out;
+ }
+
+ ret = ocfs2_claim_clusters(osb, handle, data_ac,
+ len, &p_cluster, &num_clusters);
+ if (ret) {
+ mlog_errno(ret);
+ goto out_commit;
+ }
+
+ new_blkno = ocfs2_clusters_to_blocks(osb->sb, p_cluster);
+
+ mlog(0, "reflink xattr buckets %llu to %llu, len %u\n",
+ (unsigned long long)blkno, (unsigned long long)new_blkno, len);
+ ret = ocfs2_reflink_xattr_buckets(handle, blkno, new_blkno, len,
+ meta_ac, data_ac, args);
+ if (ret) {
+ mlog_errno(ret);
+ goto out_commit;
+ }
+
+ mlog(0, "insert new xattr extent rec start %llu len %u to %u\n",
+ (unsigned long long)new_blkno, len, cpos);
+ ret = ocfs2_insert_extent(handle, &et, cpos, new_blkno,
+ len, 0, meta_ac);
+ if (ret)
+ mlog_errno(ret);
+
+out_commit:
+ ocfs2_commit_trans(osb, handle);
+
+out:
+ if (meta_ac)
+ ocfs2_free_alloc_context(meta_ac);
+ if (data_ac)
+ ocfs2_free_alloc_context(data_ac);
+ return ret;
+}
+
+/*
+ * Create reflinked xattr buckets.
+ * We will add bucket one by one, and refcount all the xattrs in the bucket
+ * if they are stored outside.
+ */
+static int ocfs2_reflink_xattr_tree(struct ocfs2_xattr_reflink *args,
+ struct buffer_head *blk_bh,
+ struct buffer_head *new_blk_bh)
+{
+ int ret;
+ struct ocfs2_reflink_xattr_tree_args para;
+
+ memset(¶, 0, sizeof(para));
+ para.reflink = args;
+ para.old_blk_bh = blk_bh;
+ para.new_blk_bh = new_blk_bh;
+
+ para.old_bucket = ocfs2_xattr_bucket_new(args->old_inode);
+ if (!para.old_bucket) {
+ mlog_errno(-ENOMEM);
+ return -ENOMEM;
+ }
+
+ para.new_bucket = ocfs2_xattr_bucket_new(args->new_inode);
+ if (!para.new_bucket) {
+ ret = -ENOMEM;
+ mlog_errno(ret);
+ goto out;
+ }
+
+ ret = ocfs2_iterate_xattr_index_block(args->old_inode, blk_bh,
+ ocfs2_reflink_xattr_rec,
+ ¶);
+ if (ret)
+ mlog_errno(ret);
+
+out:
+ ocfs2_xattr_bucket_free(para.old_bucket);
+ ocfs2_xattr_bucket_free(para.new_bucket);
+ return ret;
+}
+
+static int ocfs2_reflink_xattr_in_block(struct ocfs2_xattr_reflink *args,
+ struct buffer_head *blk_bh)
+{
+ int ret, indexed = 0;
+ struct buffer_head *new_blk_bh = NULL;
+ struct ocfs2_xattr_block *xb =
+ (struct ocfs2_xattr_block *)blk_bh->b_data;
+
+
+ if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)
+ indexed = 1;
+
+ ret = ocfs2_create_empty_xattr_block(args->new_inode, args->new_bh,
+ &new_blk_bh, indexed);
+ if (ret) {
+ mlog_errno(ret);
+ goto out;
+ }
+
+ if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED))
+ ret = ocfs2_reflink_xattr_block(args, blk_bh, new_blk_bh);
+ else
+ ret = ocfs2_reflink_xattr_tree(args, blk_bh, new_blk_bh);
+ if (ret)
+ mlog_errno(ret);
+
+out:
+ brelse(new_blk_bh);
+ return ret;
+}
+
+int ocfs2_reflink_xattrs(struct inode *old_inode,
+ struct buffer_head *old_bh,
+ struct inode *new_inode,
+ struct buffer_head *new_bh)
+{
+ int ret;
+ struct ocfs2_xattr_reflink args;
+ struct ocfs2_inode_info *oi = OCFS2_I(old_inode);
+ struct ocfs2_dinode *di = (struct ocfs2_dinode *)old_bh->b_data;
+ struct buffer_head *blk_bh = NULL;
+ struct ocfs2_cached_dealloc_ctxt dealloc;
+ struct ocfs2_refcount_tree *ref_tree;
+ struct buffer_head *ref_root_bh = NULL;
+
+ ret = ocfs2_lock_refcount_tree(OCFS2_SB(old_inode->i_sb),
+ le64_to_cpu(di->i_refcount_loc),
+ 1, &ref_tree, &ref_root_bh);
+ if (ret) {
+ mlog_errno(ret);
+ goto out;
+ }
+
+ ocfs2_init_dealloc_ctxt(&dealloc);
+
+ args.old_inode = old_inode;
+ args.new_inode = new_inode;
+ args.old_bh = old_bh;
+ args.new_bh = new_bh;
+ args.ref_ci = &ref_tree->rf_ci;
+ args.ref_root_bh = ref_root_bh;
+ args.dealloc = &dealloc;
+
+ if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) {
+ ret = ocfs2_reflink_xattr_inline(&args);
+ if (ret) {
+ mlog_errno(ret);
+ goto out_unlock;
+ }
+ }
+
+ if (!di->i_xattr_loc)
+ goto out_unlock;
+
+ ret = ocfs2_read_xattr_block(old_inode, le64_to_cpu(di->i_xattr_loc),
+ &blk_bh);
+ if (ret < 0) {
+ mlog_errno(ret);
+ goto out_unlock;
+ }
+
+ ret = ocfs2_reflink_xattr_in_block(&args, blk_bh);
+ if (ret)
+ mlog_errno(ret);
+
+ brelse(blk_bh);
+
+out_unlock:
+ ocfs2_unlock_refcount_tree(OCFS2_SB(old_inode->i_sb),
+ ref_tree, 1);
+ brelse(ref_root_bh);
+
+ if (ocfs2_dealloc_has_cluster(&dealloc)) {
+ ocfs2_schedule_truncate_log_flush(OCFS2_SB(old_inode->i_sb), 1);
+ ocfs2_run_deallocs(OCFS2_SB(old_inode->i_sb), &dealloc);
+ }
+
+out:
+ return ret;
+}
+
+/*
* 'security' attributes support
*/
static size_t ocfs2_xattr_security_list(struct inode *inode, char *list,
diff --git a/fs/ocfs2/xattr.h b/fs/ocfs2/xattr.h
index e74703f..4f91305 100644
--- a/fs/ocfs2/xattr.h
+++ b/fs/ocfs2/xattr.h
@@ -90,4 +90,8 @@ int ocfs2_xattr_attach_refcount_tree(struct inode *inode,
struct ocfs2_caching_info *ref_ci,
struct buffer_head *ref_root_bh,
struct ocfs2_cached_dealloc_ctxt *dealloc);
+int ocfs2_reflink_xattrs(struct inode *old_inode,
+ struct buffer_head *old_bh,
+ struct inode *new_inode,
+ struct buffer_head *new_bh);
#endif /* OCFS2_XATTR_H */
--
1.6.2.rc2.16.gf474c
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