1 // SPDX-License-Identifier: GPL-2.0-only
8 /* Some bitmaps are internally represented as an array of unsigned long, some
9  * as an array of u32 (some even as single u32 for now). To avoid the need of
17 	return ~(u32)0 >> (32 - n % 32);  in ethnl_lower_bits()
26  * ethnl_bitmap32_clear() - Clear u32 based bitmap
78  * ethnl_bitmap32_not_zero() - Check if any bit is set in an interval
83  * Return: true if there is non-zero bit with  index @start <= i < @end,
108 			(end_word - start_word) * sizeof(u32)))  in ethnl_bitmap32_not_zero()
116  * ethnl_bitmap32_update() - Modify u32 based bitmap according to value/mask
146 		nbits -= 32;  in ethnl_bitmap32_update()
159  * ethnl_bitset32_size() - Calculate size of bitset nested attribute
163  * @names:   array of bit names (optional)
205 			/* bit nest */  in ethnl_bitset32_size()
208 		/* bits nest */  in ethnl_bitset32_size()
212 	/* outermost nest */  in ethnl_bitset32_size()
217  * ethnl_put_bitset32() - Put a bitset nest into a message
219  * @attrtype: attribute type for the bitset nest
223  * @names:    array of bit names (optional)
236 	struct nlattr *nest;  in ethnl_put_bitset32()  local
239 	nest = nla_nest_start(skb, attrtype);  in ethnl_put_bitset32()
240 	if (!nest)  in ethnl_put_bitset32()
241 		return -EMSGSIZE;  in ethnl_put_bitset32()
258 			dst[nwords - 1] &= ethnl_lower_bits(nbits);  in ethnl_put_bitset32()
267 				dst[nwords - 1] &= ethnl_lower_bits(nbits);  in ethnl_put_bitset32()
297 	nla_nest_end(skb, nest);  in ethnl_put_bitset32()
301 	nla_nest_cancel(skb, nest);  in ethnl_put_bitset32()
302 	return -EMSGSIZE;  in ethnl_put_bitset32()
321  * ethnl_bitset_is_compact() - check if bitset attribute represents a compact
333 	ret = nla_parse_nested(tb, ARRAY_SIZE(bitset_policy) - 1, bitset,  in ethnl_bitset_is_compact()
340 			return -EINVAL;  in ethnl_bitset_is_compact()
345 		return -EINVAL;  in ethnl_bitset_is_compact()
352  * ethnl_name_to_idx() - look up string index for a name
353  * @names:   array of ETH_GSTRING_LEN sized strings
354  * @n_names: number of strings in the array
357  * Return: index of the string if found, -ENOENT if not found
365 		return -ENOENT;  in ethnl_name_to_idx()
374 	return -ENOENT;  in ethnl_name_to_idx()
385 	ret = nla_parse_nested(tb, ARRAY_SIZE(bit_policy) - 1, bit_attr,  in ethnl_parse_bit()
398 			return -EOPNOTSUPP;  in ethnl_parse_bit()
406 			return -EINVAL;  in ethnl_parse_bit()
415 			return -EOPNOTSUPP;  in ethnl_parse_bit()
420 		return -EINVAL;  in ethnl_parse_bit()
429  * ethnl_bitmap32_equal() - Compare two bitmaps
462 		return -EINVAL;  in ethnl_update_bitset32_verbose()
467 		return -EINVAL;  in ethnl_update_bitset32_verbose()
481 			return -ENOMEM;  in ethnl_update_bitset32_verbose()
494 			return -EINVAL;  in ethnl_update_bitset32_verbose()
521 				       const struct nlattr *nest,  in ethnl_compact_sanity_checks()  argument
532 		return -EINVAL;  in ethnl_compact_sanity_checks()
535 		NL_SET_ERR_MSG_ATTR(extack, nest,  in ethnl_compact_sanity_checks()
537 		return -EINVAL;  in ethnl_compact_sanity_checks()
540 		NL_SET_ERR_MSG_ATTR(extack, nest,  in ethnl_compact_sanity_checks()
542 		return -EINVAL;  in ethnl_compact_sanity_checks()
545 		NL_SET_ERR_MSG_ATTR(extack, nest,  in ethnl_compact_sanity_checks()
547 		return -EINVAL;  in ethnl_compact_sanity_checks()
555 		return -EINVAL;  in ethnl_compact_sanity_checks()
561 		return -EINVAL;  in ethnl_compact_sanity_checks()
571 		return -EINVAL;  in ethnl_compact_sanity_checks()
577  * ethnl_update_bitset32() - Apply a bitset nest to a u32 based bitmap
580  * @attr:    nest attribute to parse and apply
581  * @names:   array of bit names; may be null for compact format
603 	ret = nla_parse_nested(tb, ARRAY_SIZE(bitset_policy) - 1, attr,  in ethnl_update_bitset32()
630  * ethnl_parse_bitset() - Compute effective value and mask from bitset nest
634  * @attr:    nest attribute to parse and apply
635  * @names:   array of bit names; may be null for compact format
657 	ret = nla_parse_nested(tb, ARRAY_SIZE(bitset_policy) - 1, attr,  in ethnl_parse_bitset()
676 			bitmap_clear(val, change_bits, nbits - change_bits);  in ethnl_parse_bitset()
685 					     nbits - change_bits);  in ethnl_parse_bitset()
694 		return -EINVAL;  in ethnl_parse_bitset()
699 		return -EINVAL;  in ethnl_parse_bitset()
727 /* 64-bit big endian architectures are the only case when u32 based bitmaps
754 			return -ENOMEM;  in ethnl_bitset_size()
790 			return -ENOMEM;  in ethnl_put_bitset()
825 			return -ENOMEM;  in ethnl_update_bitset()
844 /* On little endian 64-bit and all 32-bit architectures, an unsigned long