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| author | Michal Kubecek <mkubecek@suse.cz> | 2020-03-12 21:07:53 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2020-03-12 23:32:32 +0100 |
| commit | 88db6d1e4f6222d22c1c4b4d4d7166cfa9d2fe0e (patch) | |
| tree | 8857cf131cdaf9990495ec4010d240da360df15b /net/ethtool/bitset.h | |
| parent | ethtool: provide netdev features with FEATURES_GET request (diff) | |
| download | linux-88db6d1e4f6222d22c1c4b4d4d7166cfa9d2fe0e.tar.xz linux-88db6d1e4f6222d22c1c4b4d4d7166cfa9d2fe0e.zip | |
ethtool: add ethnl_parse_bitset() helper
Unlike other SET type commands, modifying netdev features is required to
provide a reply telling userspace what was actually changed, compared to
what was requested. For that purpose, the "modified" flag provided by
ethnl_update_bitset() is not sufficient, we need full information which
bits were requested to change.
Therefore provide ethnl_parse_bitset() returning effective value and mask
bitmaps equivalent to the contents of a bitset nested attribute.
v2: use non-atomic __set_bit() (suggested by David Miller)
Signed-off-by: Michal Kubecek <mkubecek@suse.cz>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ethtool/bitset.h')
| -rw-r--r-- | net/ethtool/bitset.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/net/ethtool/bitset.h b/net/ethtool/bitset.h index b849f9d19676..c2c2e0051d00 100644 --- a/net/ethtool/bitset.h +++ b/net/ethtool/bitset.h @@ -26,5 +26,9 @@ int ethnl_update_bitset(unsigned long *bitmap, unsigned int nbits, int ethnl_update_bitset32(u32 *bitmap, unsigned int nbits, const struct nlattr *attr, ethnl_string_array_t names, struct netlink_ext_ack *extack, bool *mod); +int ethnl_parse_bitset(unsigned long *val, unsigned long *mask, + unsigned int nbits, const struct nlattr *attr, + ethnl_string_array_t names, + struct netlink_ext_ack *extack); #endif /* _NET_ETHTOOL_BITSET_H */ |