static int ocfs2_truncate_clusters(ocfs2_filesys *fs, struct ocfs2_extent_rec *rec, uint64_t ino, uint32_t len, uint64_t start) { if (!ocfs2_refcount_tree(OCFS2_RAW_SB(fs->fs_super)) || !(rec->e_flags & OCFS2_EXT_REFCOUNTED)) return ocfs2_free_clusters(fs, len, start); assert(ino); return ocfs2_decrease_refcount(fs, ino, ocfs2_blocks_to_clusters(fs, start), len, 1); }
static int __ocfs2_move_extent(handle_t *handle, struct ocfs2_move_extents_context *context, u32 cpos, u32 len, u32 p_cpos, u32 new_p_cpos, int ext_flags) { int ret = 0, index; struct inode *inode = context->inode; struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); struct ocfs2_extent_rec *rec, replace_rec; struct ocfs2_path *path = NULL; struct ocfs2_extent_list *el; u64 ino = ocfs2_metadata_cache_owner(context->et.et_ci); u64 old_blkno = ocfs2_clusters_to_blocks(inode->i_sb, p_cpos); ret = ocfs2_duplicate_clusters_by_page(handle, inode, cpos, p_cpos, new_p_cpos, len); if (ret) { mlog_errno(ret); goto out; } memset(&replace_rec, 0, sizeof(replace_rec)); replace_rec.e_cpos = cpu_to_le32(cpos); replace_rec.e_leaf_clusters = cpu_to_le16(len); replace_rec.e_blkno = cpu_to_le64(ocfs2_clusters_to_blocks(inode->i_sb, new_p_cpos)); path = ocfs2_new_path_from_et(&context->et); if (!path) { ret = -ENOMEM; mlog_errno(ret); goto out; } ret = ocfs2_find_path(INODE_CACHE(inode), path, cpos); if (ret) { mlog_errno(ret); goto out; } el = path_leaf_el(path); index = ocfs2_search_extent_list(el, cpos); if (index == -1) { ret = ocfs2_error(inode->i_sb, "Inode %llu has an extent at cpos %u which can no longer be found\n", (unsigned long long)ino, cpos); goto out; } rec = &el->l_recs[index]; BUG_ON(ext_flags != rec->e_flags); /* * after moving/defraging to new location, the extent is not going * to be refcounted anymore. */ replace_rec.e_flags = ext_flags & ~OCFS2_EXT_REFCOUNTED; ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), context->et.et_root_bh, OCFS2_JOURNAL_ACCESS_WRITE); if (ret) { mlog_errno(ret); goto out; } ret = ocfs2_split_extent(handle, &context->et, path, index, &replace_rec, context->meta_ac, &context->dealloc); if (ret) { mlog_errno(ret); goto out; } ocfs2_journal_dirty(handle, context->et.et_root_bh); context->new_phys_cpos = new_p_cpos; /* * need I to append truncate log for old clusters? */ if (old_blkno) { if (ext_flags & OCFS2_EXT_REFCOUNTED) ret = ocfs2_decrease_refcount(inode, handle, ocfs2_blocks_to_clusters(osb->sb, old_blkno), len, context->meta_ac, &context->dealloc, 1); else ret = ocfs2_truncate_log_append(osb, handle, old_blkno, len); } ocfs2_update_inode_fsync_trans(handle, inode, 0); out: ocfs2_free_path(path); return ret; }