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ieee802154: Use netlink policies when relevant on scan parameters 

Instead of open-coding scan parameters (page, channels, duration, etc),
let's use the existing NLA_POLICY* macros. This help greatly reducing
the error handling and clarifying the overall logic.

Fixes: ed3557c947 ("ieee802154: Add support for user scanning requests")
Suggested-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/r/20230214135035.1202471-2-miquel.raynal@bootlin.com
Signed-off-by: Stefan Schmidt <stefan@datenfreihafen.org>
This commit is contained in:
Miquel Raynal 2023-02-14 14:50:30 +01:00 committed by Stefan Schmidt
parent 6130543654
commit 648324c9b6
1 changed files with 28 additions and 56 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

84
net/ieee802154/nl802154.c
View File

@ -187,8 +187,8 @@ static const struct nla_policy nl802154_policy[NL802154_ATTR_MAX+1] = {
[NL802154_ATTR_WPAN_DEV] = { .type = NLA_U64 },
[NL802154_ATTR_PAGE] = { .type = NLA_U8, },
[NL802154_ATTR_CHANNEL] = { .type = NLA_U8, },
[NL802154_ATTR_PAGE] = NLA_POLICY_MAX(NLA_U8, IEEE802154_MAX_PAGE),
[NL802154_ATTR_CHANNEL] = NLA_POLICY_MAX(NLA_U8, IEEE802154_MAX_CHANNEL),
[NL802154_ATTR_TX_POWER] = { .type = NLA_S32, },
@ -221,13 +221,19 @@ static const struct nla_policy nl802154_policy[NL802154_ATTR_MAX+1] = {
[NL802154_ATTR_COORDINATOR] = { .type = NLA_NESTED },
[NL802154_ATTR_SCAN_TYPE] = { .type = NLA_U8 },
[NL802154_ATTR_SCAN_CHANNELS] = { .type = NLA_U32 },
[NL802154_ATTR_SCAN_PREAMBLE_CODES] = { .type = NLA_U64 },
[NL802154_ATTR_SCAN_MEAN_PRF] = { .type = NLA_U8 },
[NL802154_ATTR_SCAN_DURATION] = { .type = NLA_U8 },
[NL802154_ATTR_SCAN_DONE_REASON] = { .type = NLA_U8 },
[NL802154_ATTR_BEACON_INTERVAL] = { .type = NLA_U8 },
[NL802154_ATTR_SCAN_TYPE] =
NLA_POLICY_RANGE(NLA_U8, NL802154_SCAN_ED, NL802154_SCAN_RIT_PASSIVE),
[NL802154_ATTR_SCAN_CHANNELS] =
NLA_POLICY_MASK(NLA_U32, GENMASK(IEEE802154_MAX_CHANNEL, 0)),
[NL802154_ATTR_SCAN_PREAMBLE_CODES] = { .type = NLA_REJECT },
[NL802154_ATTR_SCAN_MEAN_PRF] = { .type = NLA_REJECT },
[NL802154_ATTR_SCAN_DURATION] =
NLA_POLICY_MAX(NLA_U8, IEEE802154_MAX_SCAN_DURATION),
[NL802154_ATTR_SCAN_DONE_REASON] =
NLA_POLICY_RANGE(NLA_U8, NL802154_SCAN_DONE_REASON_FINISHED,
NL802154_SCAN_DONE_REASON_ABORTED),
[NL802154_ATTR_BEACON_INTERVAL] =
NLA_POLICY_MAX(NLA_U8, IEEE802154_MAX_SCAN_DURATION),
#ifdef CONFIG_IEEE802154_NL802154_EXPERIMENTAL
[NL802154_ATTR_SEC_ENABLED] = { .type = NLA_U8, },
@ -1423,51 +1429,23 @@ static int nl802154_trigger_scan(struct sk_buff *skb, struct genl_info *info)
goto free_request;
}
if (info->attrs[NL802154_ATTR_PAGE]) {
/* Use current page by default */
if (info->attrs[NL802154_ATTR_PAGE])
request->page = nla_get_u8(info->attrs[NL802154_ATTR_PAGE]);
if (request->page > IEEE802154_MAX_PAGE) {
pr_err("Invalid page %d > %d\n",
request->page, IEEE802154_MAX_PAGE);
err = -EINVAL;
goto free_request;
}
} else {
/* Use current page by default */
else
request->page = wpan_phy->current_page;
}
if (info->attrs[NL802154_ATTR_SCAN_CHANNELS]) {
/* Scan all supported channels by default */
if (info->attrs[NL802154_ATTR_SCAN_CHANNELS])
request->channels = nla_get_u32(info->attrs[NL802154_ATTR_SCAN_CHANNELS]);
if (request->channels >= BIT(IEEE802154_MAX_CHANNEL + 1)) {
pr_err("Invalid channels bitfield %x ≥ %lx\n",
request->channels,
BIT(IEEE802154_MAX_CHANNEL + 1));
err = -EINVAL;
goto free_request;
}
} else {
/* Scan all supported channels by default */
else
request->channels = wpan_phy->supported.channels[request->page];
}
if (info->attrs[NL802154_ATTR_SCAN_PREAMBLE_CODES] ||
info->attrs[NL802154_ATTR_SCAN_MEAN_PRF]) {
pr_err("Preamble codes and mean PRF not supported yet\n");
err = -EINVAL;
goto free_request;
}
if (info->attrs[NL802154_ATTR_SCAN_DURATION]) {
/* Use maximum duration order by default */
if (info->attrs[NL802154_ATTR_SCAN_DURATION])
request->duration = nla_get_u8(info->attrs[NL802154_ATTR_SCAN_DURATION]);
if (request->duration > IEEE802154_MAX_SCAN_DURATION) {
pr_err("Duration is out of range\n");
err = -EINVAL;
goto free_request;
}
} else {
/* Use maximum duration order by default */
else
request->duration = IEEE802154_MAX_SCAN_DURATION;
}
if (wpan_dev->netdev)
dev_hold(wpan_dev->netdev);
@ -1614,17 +1592,11 @@ nl802154_send_beacons(struct sk_buff *skb, struct genl_info *info)
request->wpan_dev = wpan_dev;
request->wpan_phy = wpan_phy;
if (info->attrs[NL802154_ATTR_BEACON_INTERVAL]) {
/* Use maximum duration order by default */
if (info->attrs[NL802154_ATTR_BEACON_INTERVAL])
request->interval = nla_get_u8(info->attrs[NL802154_ATTR_BEACON_INTERVAL]);
if (request->interval > IEEE802154_MAX_SCAN_DURATION) {
pr_err("Interval is out of range\n");
err = -EINVAL;
goto free_request;
}
} else {
/* Use maximum duration order by default */
else
request->interval = IEEE802154_MAX_SCAN_DURATION;
}
if (wpan_dev->netdev)
dev_hold(wpan_dev->netdev);
@ -1640,7 +1612,7 @@ nl802154_send_beacons(struct sk_buff *skb, struct genl_info *info)
free_device:
if (wpan_dev->netdev)
dev_put(wpan_dev->netdev);
free_request:
kfree(request);
return err;