fs/btrfs/qgroup.c

3045 			       struct btrfs_qgroup_inherit *inherit,
3050 	if (inherit->flags & ~BTRFS_QGROUP_INHERIT_FLAGS_SUPP)
3052 	if (size < sizeof(*inherit) || size > PAGE_SIZE)
3064 	if (inherit->num_ref_copies > 0 || inherit->num_excl_copies > 0)
3067 	if (inherit->num_qgroups > PAGE_SIZE)
3070 	if (size != struct_size(inherit, qgroups, inherit->num_qgroups))
3079 	for (int i = 0; i < inherit->num_qgroups; i++) {
3081 		u64 qgroupid = inherit->qgroups[i];
3099 			       struct btrfs_qgroup_inherit **inherit)
3109 	if (*inherit)
3134 	*inherit = res;
3144  * Return 0 if a quick inherit is done.
3145  * Return >0 if a quick inherit is not possible, and a full rescan is needed.
3202 			 struct btrfs_qgroup_inherit *inherit)
3251 	if (btrfs_qgroup_mode(fs_info) == BTRFS_QGROUP_MODE_SIMPLE && !inherit) {
3252 		ret = qgroup_auto_inherit(fs_info, inode_rootid, &inherit);
3258 	if (inherit) {
3259 		i_qgroups = (u64 *)(inherit + 1);
3260 		nums = inherit->num_qgroups + 2 * inherit->num_ref_copies +
3261 		       2 * inherit->num_excl_copies;
3287 	if (inherit) {
3288 		i_qgroups = (u64 *)(inherit + 1);
3289 		for (i = 0; i < inherit->num_qgroups; ++i, ++i_qgroups) {
3303 		qlist_prealloc = kcalloc(inherit->num_qgroups,
3310 		for (int i = 0; i < inherit->num_qgroups; i++) {
3325 	if (inherit && inherit->flags & BTRFS_QGROUP_INHERIT_SET_LIMITS) {
3326 		dstgroup->lim_flags = inherit->lim.flags;
3327 		dstgroup->max_rfer = inherit->lim.max_rfer;
3328 		dstgroup->max_excl = inherit->lim.max_excl;
3329 		dstgroup->rsv_rfer = inherit->lim.rsv_rfer;
3330 		dstgroup->rsv_excl = inherit->lim.rsv_excl;
3341 		 * We call inherit after we clone the root in order to make sure
3353 		/* inherit the limit info */
3367 		if (!inherit && !list_empty(&srcgroup->groups))
3371 	if (!inherit)
3374 	i_qgroups = (u64 *)(inherit + 1);
3375 	for (i = 0; i < inherit->num_qgroups; ++i) {
3384 			/* Check if we can do a quick inherit. */
3395 	for (i = 0; i <  inherit->num_ref_copies; ++i, i_qgroups += 2) {
3416 	for (i = 0; i <  inherit->num_excl_copies; ++i, i_qgroups += 2) {
3446 		for (int i = 0; i < inherit->num_qgroups; i++)
3451 		kfree(inherit);