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nl80211: add error messages to nl80211_parse_chandef() 

Add some error messages to nl80211_parse_chandef() to make
failures here - especially with disabled channels - easier
to diagnose.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Johannes Berg 2018-10-01 11:55:09 +02:00
Родитель b60ad34851
Коммит 49f9cf0e1b
1 изменённых файлов: 40 добавлений и 22 удалений
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62
net/wireless/nl80211.c
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@ -2305,12 +2305,14 @@ static int nl80211_parse_chandef(struct cfg80211_registered_device *rdev,
struct genl_info *info,
struct cfg80211_chan_def *chandef)
{
struct netlink_ext_ack *extack = info->extack;
struct nlattr **attrs = info->attrs;
u32 control_freq;
if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
if (!attrs[NL80211_ATTR_WIPHY_FREQ])
return -EINVAL;
control_freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
control_freq = nla_get_u32(attrs[NL80211_ATTR_WIPHY_FREQ]);
chandef->chan = ieee80211_get_channel(&rdev->wiphy, control_freq);
chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
@ -2318,14 +2320,16 @@ static int nl80211_parse_chandef(struct cfg80211_registered_device *rdev,
chandef->center_freq2 = 0;
/* Primary channel not allowed */
if (!chandef->chan || chandef->chan->flags & IEEE80211_CHAN_DISABLED)
if (!chandef->chan || chandef->chan->flags & IEEE80211_CHAN_DISABLED) {
NL_SET_ERR_MSG_ATTR(extack, attrs[NL80211_ATTR_WIPHY_FREQ],
"Channel is disabled");
return -EINVAL;
}
if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
if (attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
enum nl80211_channel_type chantype;
chantype = nla_get_u32(
info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
chantype = nla_get_u32(attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
switch (chantype) {
case NL80211_CHAN_NO_HT:
@ -2335,42 +2339,56 @@ static int nl80211_parse_chandef(struct cfg80211_registered_device *rdev,
cfg80211_chandef_create(chandef, chandef->chan,
chantype);
/* user input for center_freq is incorrect */
if (info->attrs[NL80211_ATTR_CENTER_FREQ1] &&
chandef->center_freq1 != nla_get_u32(
info->attrs[NL80211_ATTR_CENTER_FREQ1]))
if (attrs[NL80211_ATTR_CENTER_FREQ1] &&
chandef->center_freq1 != nla_get_u32(attrs[NL80211_ATTR_CENTER_FREQ1])) {
NL_SET_ERR_MSG_ATTR(extack,
attrs[NL80211_ATTR_CENTER_FREQ1],
"bad center frequency 1");
return -EINVAL;
}
/* center_freq2 must be zero */
if (info->attrs[NL80211_ATTR_CENTER_FREQ2] &&
nla_get_u32(info->attrs[NL80211_ATTR_CENTER_FREQ2]))
if (attrs[NL80211_ATTR_CENTER_FREQ2] &&
nla_get_u32(attrs[NL80211_ATTR_CENTER_FREQ2])) {
NL_SET_ERR_MSG_ATTR(extack,
attrs[NL80211_ATTR_CENTER_FREQ2],
"center frequency 2 can't be used");
return -EINVAL;
}
break;
default:
NL_SET_ERR_MSG_ATTR(extack,
attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE],
"invalid channel type");
return -EINVAL;
}
} else if (info->attrs[NL80211_ATTR_CHANNEL_WIDTH]) {
} else if (attrs[NL80211_ATTR_CHANNEL_WIDTH]) {
chandef->width =
nla_get_u32(info->attrs[NL80211_ATTR_CHANNEL_WIDTH]);
if (info->attrs[NL80211_ATTR_CENTER_FREQ1])
nla_get_u32(attrs[NL80211_ATTR_CHANNEL_WIDTH]);
if (attrs[NL80211_ATTR_CENTER_FREQ1])
chandef->center_freq1 =
nla_get_u32(
info->attrs[NL80211_ATTR_CENTER_FREQ1]);
if (info->attrs[NL80211_ATTR_CENTER_FREQ2])
nla_get_u32(attrs[NL80211_ATTR_CENTER_FREQ1]);
if (attrs[NL80211_ATTR_CENTER_FREQ2])
chandef->center_freq2 =
nla_get_u32(
info->attrs[NL80211_ATTR_CENTER_FREQ2]);
nla_get_u32(attrs[NL80211_ATTR_CENTER_FREQ2]);
}
if (!cfg80211_chandef_valid(chandef))
if (!cfg80211_chandef_valid(chandef)) {
NL_SET_ERR_MSG(extack, "invalid channel definition");
return -EINVAL;
}
if (!cfg80211_chandef_usable(&rdev->wiphy, chandef,
IEEE80211_CHAN_DISABLED))
IEEE80211_CHAN_DISABLED)) {
NL_SET_ERR_MSG(extack, "(extension) channel is disabled");
return -EINVAL;
}
if ((chandef->width == NL80211_CHAN_WIDTH_5 ||
chandef->width == NL80211_CHAN_WIDTH_10) &&
!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_5_10_MHZ))
!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_5_10_MHZ)) {
NL_SET_ERR_MSG(extack, "5/10 MHz not supported");
return -EINVAL;
}
return 0;
}