34 static void qcow2_free_single_snapshot(BlockDriverState *bs, int i)  in qcow2_free_single_snapshot()  argument
36     BDRVQcow2State *s = bs->opaque;  in qcow2_free_single_snapshot()
45 void qcow2_free_snapshots(BlockDriverState *bs)  in qcow2_free_snapshots()  argument
47     BDRVQcow2State *s = bs->opaque;  in qcow2_free_snapshots()
51         qcow2_free_single_snapshot(bs, i);  in qcow2_free_snapshots()
81 int qcow2_do_read_snapshots(BlockDriverState *bs, bool repair,  in qcow2_do_read_snapshots()  argument
86     BDRVQcow2State *s = bs->opaque;  in qcow2_do_read_snapshots()
112         ret = bdrv_co_pread(bs->file, offset, sizeof(h), &h, 0);  in qcow2_do_read_snapshots()
150         ret = bdrv_co_pread(bs->file, offset,  in qcow2_do_read_snapshots()
166             sn->disk_size = bs->total_sectors * BDRV_SECTOR_SIZE;  in qcow2_do_read_snapshots()
188             ret = bdrv_co_pread(bs->file, offset, unknown_extra_data_size,  in qcow2_do_read_snapshots()
200         ret = bdrv_co_pread(bs->file, offset, id_str_size, sn->id_str, 0);  in qcow2_do_read_snapshots()
210         ret = bdrv_co_pread(bs->file, offset, name_size, sn->name, 0);  in qcow2_do_read_snapshots()
243             qcow2_free_single_snapshot(bs, i);  in qcow2_do_read_snapshots()
261     qcow2_free_snapshots(bs);  in qcow2_do_read_snapshots()
265 int coroutine_fn qcow2_read_snapshots(BlockDriverState *bs, Error **errp)  in qcow2_read_snapshots()  argument
267     return qcow2_do_read_snapshots(bs, false, NULL, NULL, errp);  in qcow2_read_snapshots()
271 int qcow2_write_snapshots(BlockDriverState *bs)  in qcow2_write_snapshots()  argument
273     BDRVQcow2State *s = bs->opaque;  in qcow2_write_snapshots()
305     snapshots_offset = qcow2_alloc_clusters(bs, snapshots_size);  in qcow2_write_snapshots()
311     ret = bdrv_flush(bs);  in qcow2_write_snapshots()
318     ret = qcow2_pre_write_overlap_check(bs, 0, offset, snapshots_size, false);  in qcow2_write_snapshots()
353         ret = bdrv_pwrite(bs->file, offset, sizeof(h), &h, 0);  in qcow2_write_snapshots()
359         ret = bdrv_pwrite(bs->file, offset, sizeof(extra), &extra, 0);  in qcow2_write_snapshots()
373             ret = bdrv_pwrite(bs->file, offset, unknown_extra_data_size,  in qcow2_write_snapshots()
381         ret = bdrv_pwrite(bs->file, offset, id_str_size, sn->id_str, 0);  in qcow2_write_snapshots()
387         ret = bdrv_pwrite(bs->file, offset, name_size, sn->name, 0);  in qcow2_write_snapshots()
398     ret = bdrv_flush(bs);  in qcow2_write_snapshots()
409     ret = bdrv_pwrite_sync(bs->file, offsetof(QCowHeader, nb_snapshots),  in qcow2_write_snapshots()
416     qcow2_free_clusters(bs, s->snapshots_offset, s->snapshots_size,  in qcow2_write_snapshots()
424         qcow2_free_clusters(bs, snapshots_offset, snapshots_size,  in qcow2_write_snapshots()
430 int coroutine_fn qcow2_check_read_snapshot_table(BlockDriverState *bs,  in qcow2_check_read_snapshot_table()  argument
434     BDRVQcow2State *s = bs->opaque;  in qcow2_check_read_snapshot_table()
445     ret = bdrv_co_pread(bs->file, offsetof(QCowHeader, nb_snapshots),  in qcow2_check_read_snapshot_table()
466     ret = qcow2_validate_table(bs, s->snapshots_offset, s->nb_snapshots,  in qcow2_check_read_snapshot_table()
488     ret = qcow2_do_read_snapshots(bs, fix & BDRV_FIX_ERRORS,  in qcow2_check_read_snapshot_table()
516         ret = bdrv_co_pwrite_sync(bs->file, offsetof(QCowHeader, nb_snapshots),  in qcow2_check_read_snapshot_table()
551 int coroutine_fn qcow2_check_fix_snapshot_table(BlockDriverState *bs,  in qcow2_check_fix_snapshot_table()  argument
555     BDRVQcow2State *s = bs->opaque;  in qcow2_check_fix_snapshot_table()
560         ret = qcow2_write_snapshots(bs);  in qcow2_check_fix_snapshot_table()
576 static void find_new_snapshot_id(BlockDriverState *bs,  in find_new_snapshot_id()  argument
579     BDRVQcow2State *s = bs->opaque;  in find_new_snapshot_id()
593 static int find_snapshot_by_id_and_name(BlockDriverState *bs,  in find_snapshot_by_id_and_name()  argument
597     BDRVQcow2State *s = bs->opaque;  in find_snapshot_by_id_and_name()
624 static int find_snapshot_by_id_or_name(BlockDriverState *bs,  in find_snapshot_by_id_or_name()  argument
629     ret = find_snapshot_by_id_and_name(bs, id_or_name, NULL);  in find_snapshot_by_id_or_name()
633     return find_snapshot_by_id_and_name(bs, NULL, id_or_name);  in find_snapshot_by_id_or_name()
637 int qcow2_snapshot_create(BlockDriverState *bs, QEMUSnapshotInfo *sn_info)  in qcow2_snapshot_create()  argument
639     BDRVQcow2State *s = bs->opaque;  in qcow2_snapshot_create()
651     if (has_data_file(bs)) {  in qcow2_snapshot_create()
658     find_new_snapshot_id(bs, sn_info->id_str, sizeof(sn_info->id_str));  in qcow2_snapshot_create()
664     sn->disk_size = bs->total_sectors * BDRV_SECTOR_SIZE;  in qcow2_snapshot_create()
673     l1_table_offset = qcow2_alloc_clusters(bs, s->l1_size * L1E_SIZE);  in qcow2_snapshot_create()
692     ret = qcow2_pre_write_overlap_check(bs, 0, sn->l1_table_offset,  in qcow2_snapshot_create()
698     ret = bdrv_pwrite(bs->file, sn->l1_table_offset, s->l1_size * L1E_SIZE,  in qcow2_snapshot_create()
712     ret = qcow2_update_snapshot_refcount(bs, s->l1_table_offset, s->l1_size, 1);  in qcow2_snapshot_create()
727     ret = qcow2_write_snapshots(bs);  in qcow2_snapshot_create()
739     qcow2_cluster_discard(bs, qcow2_vm_state_offset(s),  in qcow2_snapshot_create()
746       qcow2_check_refcounts(bs, &result, 0);  in qcow2_snapshot_create()
760 int qcow2_snapshot_goto(BlockDriverState *bs, const char *snapshot_id)  in qcow2_snapshot_goto()  argument
762     BDRVQcow2State *s = bs->opaque;  in qcow2_snapshot_goto()
770     if (has_data_file(bs)) {  in qcow2_snapshot_goto()
775     snapshot_index = find_snapshot_by_id_or_name(bs, snapshot_id);  in qcow2_snapshot_goto()
781     ret = qcow2_validate_table(bs, sn->l1_table_offset, sn->l1_size,  in qcow2_snapshot_goto()
789     if (sn->disk_size != bs->total_sectors * BDRV_SECTOR_SIZE) {  in qcow2_snapshot_goto()
790         BlockBackend *blk = blk_new_with_bs(bs, BLK_PERM_RESIZE, BLK_PERM_ALL,  in qcow2_snapshot_goto()
812     ret = qcow2_grow_l1_table(bs, sn->l1_size, true);  in qcow2_snapshot_goto()
834     ret = bdrv_pread(bs->file, sn->l1_table_offset, sn_l1_bytes, sn_l1_table,  in qcow2_snapshot_goto()
840     ret = qcow2_update_snapshot_refcount(bs, sn->l1_table_offset,  in qcow2_snapshot_goto()
846     ret = qcow2_pre_write_overlap_check(bs, QCOW2_OL_ACTIVE_L1,  in qcow2_snapshot_goto()
853     ret = bdrv_pwrite_sync(bs->file, s->l1_table_offset, cur_l1_bytes,  in qcow2_snapshot_goto()
869     ret = qcow2_update_snapshot_refcount(bs, s->l1_table_offset,  in qcow2_snapshot_goto()
891     ret = qcow2_update_snapshot_refcount(bs, s->l1_table_offset, s->l1_size, 0);  in qcow2_snapshot_goto()
899         qcow2_check_refcounts(bs, &result, 0);  in qcow2_snapshot_goto()
909 int qcow2_snapshot_delete(BlockDriverState *bs,  in qcow2_snapshot_delete()  argument
914     BDRVQcow2State *s = bs->opaque;  in qcow2_snapshot_delete()
918     if (has_data_file(bs)) {  in qcow2_snapshot_delete()
923     snapshot_index = find_snapshot_by_id_and_name(bs, snapshot_id, name);  in qcow2_snapshot_delete()
930     ret = qcow2_validate_table(bs, sn.l1_table_offset, sn.l1_size,  in qcow2_snapshot_delete()
942     ret = qcow2_write_snapshots(bs);  in qcow2_snapshot_delete()
961     ret = qcow2_update_snapshot_refcount(bs, sn.l1_table_offset,  in qcow2_snapshot_delete()
967     qcow2_free_clusters(bs, sn.l1_table_offset, sn.l1_size * L1E_SIZE,  in qcow2_snapshot_delete()
971     ret = qcow2_update_snapshot_refcount(bs, s->l1_table_offset, s->l1_size, 0);  in qcow2_snapshot_delete()
981         qcow2_check_refcounts(bs, &result, 0);  in qcow2_snapshot_delete()
987 int qcow2_snapshot_list(BlockDriverState *bs, QEMUSnapshotInfo **psn_tab)  in qcow2_snapshot_list()  argument
989     BDRVQcow2State *s = bs->opaque;  in qcow2_snapshot_list()
994     if (has_data_file(bs)) {  in qcow2_snapshot_list()
1020 int qcow2_snapshot_load_tmp(BlockDriverState *bs,  in qcow2_snapshot_load_tmp()  argument
1026     BDRVQcow2State *s = bs->opaque;  in qcow2_snapshot_load_tmp()
1032     assert(bdrv_is_read_only(bs));  in qcow2_snapshot_load_tmp()
1035     snapshot_index = find_snapshot_by_id_and_name(bs, snapshot_id, name);  in qcow2_snapshot_load_tmp()
1044     ret = qcow2_validate_table(bs, sn->l1_table_offset, sn->l1_size,  in qcow2_snapshot_load_tmp()
1051     new_l1_table = qemu_try_blockalign(bs->file->bs, new_l1_bytes);  in qcow2_snapshot_load_tmp()
1056     ret = bdrv_pread(bs->file, sn->l1_table_offset, new_l1_bytes,  in qcow2_snapshot_load_tmp()