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linux/net/wireless/pmsr.c
Johannes Berg 8cb081746c netlink: make validation more configurable for future strictness 
We currently have two levels of strict validation:

 1) liberal (default)
     - undefined (type >= max) & NLA_UNSPEC attributes accepted
     - attribute length >= expected accepted
     - garbage at end of message accepted
 2) strict (opt-in)
     - NLA_UNSPEC attributes accepted
     - attribute length >= expected accepted

Split out parsing strictness into four different options:
 * TRAILING     - check that there's no trailing data after parsing
                  attributes (in message or nested)
 * MAXTYPE      - reject attrs > max known type
 * UNSPEC       - reject attributes with NLA_UNSPEC policy entries
 * STRICT_ATTRS - strictly validate attribute size

The default for future things should be *everything*.
The current *_strict() is a combination of TRAILING and MAXTYPE,
and is renamed to _deprecated_strict().
The current regular parsing has none of this, and is renamed to
*_parse_deprecated().

Additionally it allows us to selectively set one of the new flags
even on old policies. Notably, the UNSPEC flag could be useful in
this case, since it can be arranged (by filling in the policy) to
not be an incompatible userspace ABI change, but would then going
forward prevent forgetting attribute entries. Similar can apply
to the POLICY flag.

We end up with the following renames:
 * nla_parse           -> nla_parse_deprecated
 * nla_parse_strict    -> nla_parse_deprecated_strict
 * nlmsg_parse         -> nlmsg_parse_deprecated
 * nlmsg_parse_strict  -> nlmsg_parse_deprecated_strict
 * nla_parse_nested    -> nla_parse_nested_deprecated
 * nla_validate_nested -> nla_validate_nested_deprecated

Using spatch, of course:
    @@
    expression TB, MAX, HEAD, LEN, POL, EXT;
    @@
    -nla_parse(TB, MAX, HEAD, LEN, POL, EXT)
    +nla_parse_deprecated(TB, MAX, HEAD, LEN, POL, EXT)

    @@
    expression NLH, HDRLEN, TB, MAX, POL, EXT;
    @@
    -nlmsg_parse(NLH, HDRLEN, TB, MAX, POL, EXT)
    +nlmsg_parse_deprecated(NLH, HDRLEN, TB, MAX, POL, EXT)

    @@
    expression NLH, HDRLEN, TB, MAX, POL, EXT;
    @@
    -nlmsg_parse_strict(NLH, HDRLEN, TB, MAX, POL, EXT)
    +nlmsg_parse_deprecated_strict(NLH, HDRLEN, TB, MAX, POL, EXT)

    @@
    expression TB, MAX, NLA, POL, EXT;
    @@
    -nla_parse_nested(TB, MAX, NLA, POL, EXT)
    +nla_parse_nested_deprecated(TB, MAX, NLA, POL, EXT)

    @@
    expression START, MAX, POL, EXT;
    @@
    -nla_validate_nested(START, MAX, POL, EXT)
    +nla_validate_nested_deprecated(START, MAX, POL, EXT)

    @@
    expression NLH, HDRLEN, MAX, POL, EXT;
    @@
    -nlmsg_validate(NLH, HDRLEN, MAX, POL, EXT)
    +nlmsg_validate_deprecated(NLH, HDRLEN, MAX, POL, EXT)

For this patch, don't actually add the strict, non-renamed versions
yet so that it breaks compile if I get it wrong.

Also, while at it, make nla_validate and nla_parse go down to a
common __nla_validate_parse() function to avoid code duplication.

Ultimately, this allows us to have very strict validation for every
new caller of nla_parse()/nlmsg_parse() etc as re-introduced in the
next patch, while existing things will continue to work as is.

In effect then, this adds fully strict validation for any new command.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-04-27 17:07:21 -04:00

601 lines
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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (C) 2018 Intel Corporation
*/
#ifndef __PMSR_H
#define __PMSR_H
#include <net/cfg80211.h>
#include "core.h"
#include "nl80211.h"
#include "rdev-ops.h"
static int pmsr_parse_ftm(struct cfg80211_registered_device *rdev,
struct nlattr *ftmreq,
struct cfg80211_pmsr_request_peer *out,
struct genl_info *info)
{
const struct cfg80211_pmsr_capabilities *capa = rdev->wiphy.pmsr_capa;
struct nlattr *tb[NL80211_PMSR_FTM_REQ_ATTR_MAX + 1];
u32 preamble = NL80211_PREAMBLE_DMG; /* only optional in DMG */
/* validate existing data */
if (!(rdev->wiphy.pmsr_capa->ftm.bandwidths & BIT(out->chandef.width))) {
NL_SET_ERR_MSG(info->extack, "FTM: unsupported bandwidth");
return -EINVAL;
}
/* no validation needed - was already done via nested policy */
nla_parse_nested_deprecated(tb, NL80211_PMSR_FTM_REQ_ATTR_MAX, ftmreq,
NULL, NULL);
if (tb[NL80211_PMSR_FTM_REQ_ATTR_PREAMBLE])
preamble = nla_get_u32(tb[NL80211_PMSR_FTM_REQ_ATTR_PREAMBLE]);
/* set up values - struct is 0-initialized */
out->ftm.requested = true;
switch (out->chandef.chan->band) {
case NL80211_BAND_60GHZ:
/* optional */
break;
default:
if (!tb[NL80211_PMSR_FTM_REQ_ATTR_PREAMBLE]) {
NL_SET_ERR_MSG(info->extack,
"FTM: must specify preamble");
return -EINVAL;
}
}
if (!(capa->ftm.preambles & BIT(preamble))) {
NL_SET_ERR_MSG_ATTR(info->extack,
tb[NL80211_PMSR_FTM_REQ_ATTR_PREAMBLE],
"FTM: invalid preamble");
return -EINVAL;
}
out->ftm.preamble = preamble;
out->ftm.burst_period = 0;
if (tb[NL80211_PMSR_FTM_REQ_ATTR_BURST_PERIOD])
out->ftm.burst_period =
nla_get_u32(tb[NL80211_PMSR_FTM_REQ_ATTR_BURST_PERIOD]);
out->ftm.asap = !!tb[NL80211_PMSR_FTM_REQ_ATTR_ASAP];
if (out->ftm.asap && !capa->ftm.asap) {
NL_SET_ERR_MSG_ATTR(info->extack,
tb[NL80211_PMSR_FTM_REQ_ATTR_ASAP],
"FTM: ASAP mode not supported");
return -EINVAL;
}
if (!out->ftm.asap && !capa->ftm.non_asap) {
NL_SET_ERR_MSG(info->extack,
"FTM: non-ASAP mode not supported");
return -EINVAL;
}
out->ftm.num_bursts_exp = 0;
if (tb[NL80211_PMSR_FTM_REQ_ATTR_NUM_BURSTS_EXP])
out->ftm.num_bursts_exp =
nla_get_u32(tb[NL80211_PMSR_FTM_REQ_ATTR_NUM_BURSTS_EXP]);
if (capa->ftm.max_bursts_exponent >= 0 &&
out->ftm.num_bursts_exp > capa->ftm.max_bursts_exponent) {
NL_SET_ERR_MSG_ATTR(info->extack,
tb[NL80211_PMSR_FTM_REQ_ATTR_NUM_BURSTS_EXP],
"FTM: max NUM_BURSTS_EXP must be set lower than the device limit");
return -EINVAL;
}
out->ftm.burst_duration = 15;
if (tb[NL80211_PMSR_FTM_REQ_ATTR_BURST_DURATION])
out->ftm.burst_duration =
nla_get_u32(tb[NL80211_PMSR_FTM_REQ_ATTR_BURST_DURATION]);
out->ftm.ftms_per_burst = 0;
if (tb[NL80211_PMSR_FTM_REQ_ATTR_FTMS_PER_BURST])
out->ftm.ftms_per_burst =
nla_get_u32(tb[NL80211_PMSR_FTM_REQ_ATTR_FTMS_PER_BURST]);
if (capa->ftm.max_ftms_per_burst &&
(out->ftm.ftms_per_burst > capa->ftm.max_ftms_per_burst ||
out->ftm.ftms_per_burst == 0)) {
NL_SET_ERR_MSG_ATTR(info->extack,
tb[NL80211_PMSR_FTM_REQ_ATTR_FTMS_PER_BURST],
"FTM: FTMs per burst must be set lower than the device limit but non-zero");
return -EINVAL;
}
out->ftm.ftmr_retries = 3;
if (tb[NL80211_PMSR_FTM_REQ_ATTR_NUM_FTMR_RETRIES])
out->ftm.ftmr_retries =
nla_get_u32(tb[NL80211_PMSR_FTM_REQ_ATTR_NUM_FTMR_RETRIES]);
out->ftm.request_lci = !!tb[NL80211_PMSR_FTM_REQ_ATTR_REQUEST_LCI];
if (out->ftm.request_lci && !capa->ftm.request_lci) {
NL_SET_ERR_MSG_ATTR(info->extack,
tb[NL80211_PMSR_FTM_REQ_ATTR_REQUEST_LCI],
"FTM: LCI request not supported");
}
out->ftm.request_civicloc =
!!tb[NL80211_PMSR_FTM_REQ_ATTR_REQUEST_CIVICLOC];
if (out->ftm.request_civicloc && !capa->ftm.request_civicloc) {
NL_SET_ERR_MSG_ATTR(info->extack,
tb[NL80211_PMSR_FTM_REQ_ATTR_REQUEST_CIVICLOC],
"FTM: civic location request not supported");
}
return 0;
}
static int pmsr_parse_peer(struct cfg80211_registered_device *rdev,
struct nlattr *peer,
struct cfg80211_pmsr_request_peer *out,
struct genl_info *info)
{
struct nlattr *tb[NL80211_PMSR_PEER_ATTR_MAX + 1];
struct nlattr *req[NL80211_PMSR_REQ_ATTR_MAX + 1];
struct nlattr *treq;
int err, rem;
/* no validation needed - was already done via nested policy */
nla_parse_nested_deprecated(tb, NL80211_PMSR_PEER_ATTR_MAX, peer,
NULL, NULL);
if (!tb[NL80211_PMSR_PEER_ATTR_ADDR] ||
!tb[NL80211_PMSR_PEER_ATTR_CHAN] ||
!tb[NL80211_PMSR_PEER_ATTR_REQ]) {
NL_SET_ERR_MSG_ATTR(info->extack, peer,
"insufficient peer data");
return -EINVAL;
}
memcpy(out->addr, nla_data(tb[NL80211_PMSR_PEER_ATTR_ADDR]), ETH_ALEN);
/* reuse info->attrs */
memset(info->attrs, 0, sizeof(*info->attrs) * (NL80211_ATTR_MAX + 1));
/* need to validate here, we don't want to have validation recursion */
err = nla_parse_nested_deprecated(info->attrs, NL80211_ATTR_MAX,
tb[NL80211_PMSR_PEER_ATTR_CHAN],
nl80211_policy, info->extack);
if (err)
return err;
err = nl80211_parse_chandef(rdev, info, &out->chandef);
if (err)
return err;
/* no validation needed - was already done via nested policy */
nla_parse_nested_deprecated(req, NL80211_PMSR_REQ_ATTR_MAX,
tb[NL80211_PMSR_PEER_ATTR_REQ], NULL,
NULL);
if (!req[NL80211_PMSR_REQ_ATTR_DATA]) {
NL_SET_ERR_MSG_ATTR(info->extack,
tb[NL80211_PMSR_PEER_ATTR_REQ],
"missing request type/data");
return -EINVAL;
}
if (req[NL80211_PMSR_REQ_ATTR_GET_AP_TSF])
out->report_ap_tsf = true;
if (out->report_ap_tsf && !rdev->wiphy.pmsr_capa->report_ap_tsf) {
NL_SET_ERR_MSG_ATTR(info->extack,
req[NL80211_PMSR_REQ_ATTR_GET_AP_TSF],
"reporting AP TSF is not supported");
return -EINVAL;
}
nla_for_each_nested(treq, req[NL80211_PMSR_REQ_ATTR_DATA], rem) {
switch (nla_type(treq)) {
case NL80211_PMSR_TYPE_FTM:
err = pmsr_parse_ftm(rdev, treq, out, info);
break;
default:
NL_SET_ERR_MSG_ATTR(info->extack, treq,
"unsupported measurement type");
err = -EINVAL;
}
}
if (err)
return err;
return 0;
}
int nl80211_pmsr_start(struct sk_buff *skb, struct genl_info *info)
{
struct nlattr *reqattr = info->attrs[NL80211_ATTR_PEER_MEASUREMENTS];
struct cfg80211_registered_device *rdev = info->user_ptr[0];
struct wireless_dev *wdev = info->user_ptr[1];
struct cfg80211_pmsr_request *req;
struct nlattr *peers, *peer;
int count, rem, err, idx;
if (!rdev->wiphy.pmsr_capa)
return -EOPNOTSUPP;
if (!reqattr)
return -EINVAL;
peers = nla_find(nla_data(reqattr), nla_len(reqattr),
NL80211_PMSR_ATTR_PEERS);
if (!peers)
return -EINVAL;
count = 0;
nla_for_each_nested(peer, peers, rem) {
count++;
if (count > rdev->wiphy.pmsr_capa->max_peers) {
NL_SET_ERR_MSG_ATTR(info->extack, peer,
"Too many peers used");
return -EINVAL;
}
}
req = kzalloc(struct_size(req, peers, count), GFP_KERNEL);
if (!req)
return -ENOMEM;
if (info->attrs[NL80211_ATTR_TIMEOUT])
req->timeout = nla_get_u32(info->attrs[NL80211_ATTR_TIMEOUT]);
if (info->attrs[NL80211_ATTR_MAC]) {
if (!rdev->wiphy.pmsr_capa->randomize_mac_addr) {
NL_SET_ERR_MSG_ATTR(info->extack,
info->attrs[NL80211_ATTR_MAC],
"device cannot randomize MAC address");
err = -EINVAL;
goto out_err;
}
err = nl80211_parse_random_mac(info->attrs, req->mac_addr,
req->mac_addr_mask);
if (err)
goto out_err;
} else {
memcpy(req->mac_addr, wdev_address(wdev), ETH_ALEN);
eth_broadcast_addr(req->mac_addr_mask);
}
idx = 0;
nla_for_each_nested(peer, peers, rem) {
/* NB: this reuses info->attrs, but we no longer need it */
err = pmsr_parse_peer(rdev, peer, &req->peers[idx], info);
if (err)
goto out_err;
idx++;
}
req->n_peers = count;
req->cookie = cfg80211_assign_cookie(rdev);
req->nl_portid = info->snd_portid;
err = rdev_start_pmsr(rdev, wdev, req);
if (err)
goto out_err;
list_add_tail(&req->list, &wdev->pmsr_list);
nl_set_extack_cookie_u64(info->extack, req->cookie);
return 0;
out_err:
kfree(req);
return err;
}
void cfg80211_pmsr_complete(struct wireless_dev *wdev,
struct cfg80211_pmsr_request *req,
gfp_t gfp)
{
struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
struct sk_buff *msg;
void *hdr;
trace_cfg80211_pmsr_complete(wdev->wiphy, wdev, req->cookie);
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
if (!msg)
goto free_request;
hdr = nl80211hdr_put(msg, 0, 0, 0,
NL80211_CMD_PEER_MEASUREMENT_COMPLETE);
if (!hdr)
goto free_msg;
if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
NL80211_ATTR_PAD))
goto free_msg;
if (nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, req->cookie,
NL80211_ATTR_PAD))
goto free_msg;
genlmsg_end(msg, hdr);
genlmsg_unicast(wiphy_net(wdev->wiphy), msg, req->nl_portid);
goto free_request;
free_msg:
nlmsg_free(msg);
free_request:
spin_lock_bh(&wdev->pmsr_lock);
list_del(&req->list);
spin_unlock_bh(&wdev->pmsr_lock);
kfree(req);
}
EXPORT_SYMBOL_GPL(cfg80211_pmsr_complete);
static int nl80211_pmsr_send_ftm_res(struct sk_buff *msg,
struct cfg80211_pmsr_result *res)
{
if (res->status == NL80211_PMSR_STATUS_FAILURE) {
if (nla_put_u32(msg, NL80211_PMSR_FTM_RESP_ATTR_FAIL_REASON,
res->ftm.failure_reason))
goto error;
if (res->ftm.failure_reason ==
NL80211_PMSR_FTM_FAILURE_PEER_BUSY &&
res->ftm.busy_retry_time &&
nla_put_u32(msg, NL80211_PMSR_FTM_RESP_ATTR_BUSY_RETRY_TIME,
res->ftm.busy_retry_time))
goto error;
return 0;
}
#define PUT(tp, attr, val) \
do { \
if (nla_put_##tp(msg, \
NL80211_PMSR_FTM_RESP_ATTR_##attr, \
res->ftm.val)) \
goto error; \
} while (0)
#define PUTOPT(tp, attr, val) \
do { \
if (res->ftm.val##_valid) \
PUT(tp, attr, val); \
} while (0)
#define PUT_U64(attr, val) \
do { \
if (nla_put_u64_64bit(msg, \
NL80211_PMSR_FTM_RESP_ATTR_##attr,\
res->ftm.val, \
NL80211_PMSR_FTM_RESP_ATTR_PAD)) \
goto error; \
} while (0)
#define PUTOPT_U64(attr, val) \
do { \
if (res->ftm.val##_valid) \
PUT_U64(attr, val); \
} while (0)
if (res->ftm.burst_index >= 0)
PUT(u32, BURST_INDEX, burst_index);
PUTOPT(u32, NUM_FTMR_ATTEMPTS, num_ftmr_attempts);
PUTOPT(u32, NUM_FTMR_SUCCESSES, num_ftmr_successes);
PUT(u8, NUM_BURSTS_EXP, num_bursts_exp);
PUT(u8, BURST_DURATION, burst_duration);
PUT(u8, FTMS_PER_BURST, ftms_per_burst);
PUTOPT(s32, RSSI_AVG, rssi_avg);
PUTOPT(s32, RSSI_SPREAD, rssi_spread);
if (res->ftm.tx_rate_valid &&
!nl80211_put_sta_rate(msg, &res->ftm.tx_rate,
NL80211_PMSR_FTM_RESP_ATTR_TX_RATE))
goto error;
if (res->ftm.rx_rate_valid &&
!nl80211_put_sta_rate(msg, &res->ftm.rx_rate,
NL80211_PMSR_FTM_RESP_ATTR_RX_RATE))
goto error;
PUTOPT_U64(RTT_AVG, rtt_avg);
PUTOPT_U64(RTT_VARIANCE, rtt_variance);
PUTOPT_U64(RTT_SPREAD, rtt_spread);
PUTOPT_U64(DIST_AVG, dist_avg);
PUTOPT_U64(DIST_VARIANCE, dist_variance);
PUTOPT_U64(DIST_SPREAD, dist_spread);
if (res->ftm.lci && res->ftm.lci_len &&
nla_put(msg, NL80211_PMSR_FTM_RESP_ATTR_LCI,
res->ftm.lci_len, res->ftm.lci))
goto error;
if (res->ftm.civicloc && res->ftm.civicloc_len &&
nla_put(msg, NL80211_PMSR_FTM_RESP_ATTR_CIVICLOC,
res->ftm.civicloc_len, res->ftm.civicloc))
goto error;
#undef PUT
#undef PUTOPT
#undef PUT_U64
#undef PUTOPT_U64
return 0;
error:
return -ENOSPC;
}
static int nl80211_pmsr_send_result(struct sk_buff *msg,
struct cfg80211_pmsr_result *res)
{
struct nlattr *pmsr, *peers, *peer, *resp, *data, *typedata;
pmsr = nla_nest_start_noflag(msg, NL80211_ATTR_PEER_MEASUREMENTS);
if (!pmsr)
goto error;
peers = nla_nest_start_noflag(msg, NL80211_PMSR_ATTR_PEERS);
if (!peers)
goto error;
peer = nla_nest_start_noflag(msg, 1);
if (!peer)
goto error;
if (nla_put(msg, NL80211_PMSR_PEER_ATTR_ADDR, ETH_ALEN, res->addr))
goto error;
resp = nla_nest_start_noflag(msg, NL80211_PMSR_PEER_ATTR_RESP);
if (!resp)
goto error;
if (nla_put_u32(msg, NL80211_PMSR_RESP_ATTR_STATUS, res->status) ||
nla_put_u64_64bit(msg, NL80211_PMSR_RESP_ATTR_HOST_TIME,
res->host_time, NL80211_PMSR_RESP_ATTR_PAD))
goto error;
if (res->ap_tsf_valid &&
nla_put_u64_64bit(msg, NL80211_PMSR_RESP_ATTR_AP_TSF,
res->host_time, NL80211_PMSR_RESP_ATTR_PAD))
goto error;
if (res->final && nla_put_flag(msg, NL80211_PMSR_RESP_ATTR_FINAL))
goto error;
data = nla_nest_start_noflag(msg, NL80211_PMSR_RESP_ATTR_DATA);
if (!data)
goto error;
typedata = nla_nest_start_noflag(msg, res->type);
if (!typedata)
goto error;
switch (res->type) {
case NL80211_PMSR_TYPE_FTM:
if (nl80211_pmsr_send_ftm_res(msg, res))
goto error;
break;
default:
WARN_ON(1);
}
nla_nest_end(msg, typedata);
nla_nest_end(msg, data);
nla_nest_end(msg, resp);
nla_nest_end(msg, peer);
nla_nest_end(msg, peers);
nla_nest_end(msg, pmsr);
return 0;
error:
return -ENOSPC;
}
void cfg80211_pmsr_report(struct wireless_dev *wdev,
struct cfg80211_pmsr_request *req,
struct cfg80211_pmsr_result *result,
gfp_t gfp)
{
struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
struct sk_buff *msg;
void *hdr;
int err;
trace_cfg80211_pmsr_report(wdev->wiphy, wdev, req->cookie,
result->addr);
/*
* Currently, only variable items are LCI and civic location,
* both of which are reasonably short so we don't need to
* worry about them here for the allocation.
*/
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
if (!msg)
return;
hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PEER_MEASUREMENT_RESULT);
if (!hdr)
goto free;
if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
NL80211_ATTR_PAD))
goto free;
if (nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, req->cookie,
NL80211_ATTR_PAD))
goto free;
err = nl80211_pmsr_send_result(msg, result);
if (err) {
pr_err_ratelimited("peer measurement result: message didn't fit!");
goto free;
}
genlmsg_end(msg, hdr);
genlmsg_unicast(wiphy_net(wdev->wiphy), msg, req->nl_portid);
return;
free:
nlmsg_free(msg);
}
EXPORT_SYMBOL_GPL(cfg80211_pmsr_report);
static void cfg80211_pmsr_process_abort(struct wireless_dev *wdev)
{
struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
struct cfg80211_pmsr_request *req, *tmp;
LIST_HEAD(free_list);
lockdep_assert_held(&wdev->mtx);
spin_lock_bh(&wdev->pmsr_lock);
list_for_each_entry_safe(req, tmp, &wdev->pmsr_list, list) {
if (req->nl_portid)
continue;
list_move_tail(&req->list, &free_list);
}
spin_unlock_bh(&wdev->pmsr_lock);
list_for_each_entry_safe(req, tmp, &free_list, list) {
rdev_abort_pmsr(rdev, wdev, req);
kfree(req);
}
}
void cfg80211_pmsr_free_wk(struct work_struct *work)
{
struct wireless_dev *wdev = container_of(work, struct wireless_dev,
pmsr_free_wk);
wdev_lock(wdev);
cfg80211_pmsr_process_abort(wdev);
wdev_unlock(wdev);
}
void cfg80211_pmsr_wdev_down(struct wireless_dev *wdev)
{
struct cfg80211_pmsr_request *req;
bool found = false;
spin_lock_bh(&wdev->pmsr_lock);
list_for_each_entry(req, &wdev->pmsr_list, list) {
found = true;
req->nl_portid = 0;
}
spin_unlock_bh(&wdev->pmsr_lock);
if (found)
cfg80211_pmsr_process_abort(wdev);
WARN_ON(!list_empty(&wdev->pmsr_list));
}
void cfg80211_release_pmsr(struct wireless_dev *wdev, u32 portid)
{
struct cfg80211_pmsr_request *req;
spin_lock_bh(&wdev->pmsr_lock);
list_for_each_entry(req, &wdev->pmsr_list, list) {
if (req->nl_portid == portid) {
req->nl_portid = 0;
schedule_work(&wdev->pmsr_free_wk);
}
}
spin_unlock_bh(&wdev->pmsr_lock);
}
#endif /* __PMSR_H */
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