From 15e473046cb6e5d18a4d0057e61d76315230382b Mon Sep 17 00:00:00 2001 From: "Eric W. Biederman" Date: Fri, 7 Sep 2012 20:12:54 +0000 Subject: netlink: Rename pid to portid to avoid confusion It is a frequent mistake to confuse the netlink port identifier with a process identifier. Try to reduce this confusion by renaming fields that hold port identifiers portid instead of pid. I have carefully avoided changing the structures exported to userspace to avoid changing the userspace API. I have successfully built an allyesconfig kernel with this change. Signed-off-by: "Eric W. Biederman" Acked-by: Stephen Hemminger Signed-off-by: David S. Miller --- net/wireless/core.h | 2 +- net/wireless/mlme.c | 16 +++---- net/wireless/nl80211.c | 110 ++++++++++++++++++++++++------------------------- 3 files changed, 64 insertions(+), 64 deletions(-) (limited to 'net/wireless') diff --git a/net/wireless/core.h b/net/wireless/core.h index bc7430b5477..a343be4a52b 100644 --- a/net/wireless/core.h +++ b/net/wireless/core.h @@ -55,7 +55,7 @@ struct cfg80211_registered_device { int opencount; /* also protected by devlist_mtx */ wait_queue_head_t dev_wait; - u32 ap_beacons_nlpid; + u32 ap_beacons_nlportid; /* protected by RTNL only */ int num_running_ifaces; diff --git a/net/wireless/mlme.c b/net/wireless/mlme.c index 8fd0242ee16..ec7fcee5bad 100644 --- a/net/wireless/mlme.c +++ b/net/wireless/mlme.c @@ -615,7 +615,7 @@ EXPORT_SYMBOL(cfg80211_del_sta); struct cfg80211_mgmt_registration { struct list_head list; - u32 nlpid; + u32 nlportid; int match_len; @@ -624,7 +624,7 @@ struct cfg80211_mgmt_registration { u8 match[]; }; -int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_pid, +int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_portid, u16 frame_type, const u8 *match_data, int match_len) { @@ -672,7 +672,7 @@ int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_pid, memcpy(nreg->match, match_data, match_len); nreg->match_len = match_len; - nreg->nlpid = snd_pid; + nreg->nlportid = snd_portid; nreg->frame_type = cpu_to_le16(frame_type); list_add(&nreg->list, &wdev->mgmt_registrations); @@ -685,7 +685,7 @@ int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_pid, return err; } -void cfg80211_mlme_unregister_socket(struct wireless_dev *wdev, u32 nlpid) +void cfg80211_mlme_unregister_socket(struct wireless_dev *wdev, u32 nlportid) { struct wiphy *wiphy = wdev->wiphy; struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); @@ -694,7 +694,7 @@ void cfg80211_mlme_unregister_socket(struct wireless_dev *wdev, u32 nlpid) spin_lock_bh(&wdev->mgmt_registrations_lock); list_for_each_entry_safe(reg, tmp, &wdev->mgmt_registrations, list) { - if (reg->nlpid != nlpid) + if (reg->nlportid != nlportid) continue; if (rdev->ops->mgmt_frame_register) { @@ -710,8 +710,8 @@ void cfg80211_mlme_unregister_socket(struct wireless_dev *wdev, u32 nlpid) spin_unlock_bh(&wdev->mgmt_registrations_lock); - if (nlpid == wdev->ap_unexpected_nlpid) - wdev->ap_unexpected_nlpid = 0; + if (nlportid == wdev->ap_unexpected_nlportid) + wdev->ap_unexpected_nlportid = 0; } void cfg80211_mlme_purge_registrations(struct wireless_dev *wdev) @@ -872,7 +872,7 @@ bool cfg80211_rx_mgmt(struct wireless_dev *wdev, int freq, int sig_mbm, /* found match! */ /* Indicate the received Action frame to user space */ - if (nl80211_send_mgmt(rdev, wdev, reg->nlpid, + if (nl80211_send_mgmt(rdev, wdev, reg->nlportid, freq, sig_mbm, buf, len, gfp)) continue; diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c index 787aeaa902f..34eb5c07a56 100644 --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -496,11 +496,11 @@ static bool is_valid_ie_attr(const struct nlattr *attr) } /* message building helper */ -static inline void *nl80211hdr_put(struct sk_buff *skb, u32 pid, u32 seq, +static inline void *nl80211hdr_put(struct sk_buff *skb, u32 portid, u32 seq, int flags, u8 cmd) { /* since there is no private header just add the generic one */ - return genlmsg_put(skb, pid, seq, &nl80211_fam, flags, cmd); + return genlmsg_put(skb, portid, seq, &nl80211_fam, flags, cmd); } static int nl80211_msg_put_channel(struct sk_buff *msg, @@ -851,7 +851,7 @@ nla_put_failure: return -ENOBUFS; } -static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags, +static int nl80211_send_wiphy(struct sk_buff *msg, u32 portid, u32 seq, int flags, struct cfg80211_registered_device *dev) { void *hdr; @@ -866,7 +866,7 @@ static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags, const struct ieee80211_txrx_stypes *mgmt_stypes = dev->wiphy.mgmt_stypes; - hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_WIPHY); + hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_WIPHY); if (!hdr) return -1; @@ -1267,7 +1267,7 @@ static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb) continue; if (++idx <= start) continue; - if (nl80211_send_wiphy(skb, NETLINK_CB(cb->skb).pid, + if (nl80211_send_wiphy(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, NLM_F_MULTI, dev) < 0) { idx--; @@ -1290,7 +1290,7 @@ static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info) if (!msg) return -ENOMEM; - if (nl80211_send_wiphy(msg, info->snd_pid, info->snd_seq, 0, dev) < 0) { + if (nl80211_send_wiphy(msg, info->snd_portid, info->snd_seq, 0, dev) < 0) { nlmsg_free(msg); return -ENOBUFS; } @@ -1736,14 +1736,14 @@ static inline u64 wdev_id(struct wireless_dev *wdev) ((u64)wiphy_to_dev(wdev->wiphy)->wiphy_idx << 32); } -static int nl80211_send_iface(struct sk_buff *msg, u32 pid, u32 seq, int flags, +static int nl80211_send_iface(struct sk_buff *msg, u32 portid, u32 seq, int flags, struct cfg80211_registered_device *rdev, struct wireless_dev *wdev) { struct net_device *dev = wdev->netdev; void *hdr; - hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_INTERFACE); + hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_INTERFACE); if (!hdr) return -1; @@ -1807,7 +1807,7 @@ static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback * if_idx++; continue; } - if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).pid, + if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, NLM_F_MULTI, rdev, wdev) < 0) { mutex_unlock(&rdev->devlist_mtx); @@ -1838,7 +1838,7 @@ static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info) if (!msg) return -ENOMEM; - if (nl80211_send_iface(msg, info->snd_pid, info->snd_seq, 0, + if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0, dev, wdev) < 0) { nlmsg_free(msg); return -ENOBUFS; @@ -2056,7 +2056,7 @@ static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info) break; } - if (nl80211_send_iface(msg, info->snd_pid, info->snd_seq, 0, + if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0, rdev, wdev) < 0) { nlmsg_free(msg); return -ENOBUFS; @@ -2191,7 +2191,7 @@ static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info) if (!msg) return -ENOMEM; - hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0, + hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0, NL80211_CMD_NEW_KEY); if (IS_ERR(hdr)) return PTR_ERR(hdr); @@ -2769,7 +2769,7 @@ nla_put_failure: return false; } -static int nl80211_send_station(struct sk_buff *msg, u32 pid, u32 seq, +static int nl80211_send_station(struct sk_buff *msg, u32 portid, u32 seq, int flags, struct cfg80211_registered_device *rdev, struct net_device *dev, @@ -2778,7 +2778,7 @@ static int nl80211_send_station(struct sk_buff *msg, u32 pid, u32 seq, void *hdr; struct nlattr *sinfoattr, *bss_param; - hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION); + hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_STATION); if (!hdr) return -1; @@ -2931,7 +2931,7 @@ static int nl80211_dump_station(struct sk_buff *skb, goto out_err; if (nl80211_send_station(skb, - NETLINK_CB(cb->skb).pid, + NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, NLM_F_MULTI, dev, netdev, mac_addr, &sinfo) < 0) @@ -2977,7 +2977,7 @@ static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info) if (!msg) return -ENOMEM; - if (nl80211_send_station(msg, info->snd_pid, info->snd_seq, 0, + if (nl80211_send_station(msg, info->snd_portid, info->snd_seq, 0, rdev, dev, mac_addr, &sinfo) < 0) { nlmsg_free(msg); return -ENOBUFS; @@ -3303,7 +3303,7 @@ static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info) return rdev->ops->del_station(&rdev->wiphy, dev, mac_addr); } -static int nl80211_send_mpath(struct sk_buff *msg, u32 pid, u32 seq, +static int nl80211_send_mpath(struct sk_buff *msg, u32 portid, u32 seq, int flags, struct net_device *dev, u8 *dst, u8 *next_hop, struct mpath_info *pinfo) @@ -3311,7 +3311,7 @@ static int nl80211_send_mpath(struct sk_buff *msg, u32 pid, u32 seq, void *hdr; struct nlattr *pinfoattr; - hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION); + hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_STATION); if (!hdr) return -1; @@ -3389,7 +3389,7 @@ static int nl80211_dump_mpath(struct sk_buff *skb, if (err) goto out_err; - if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).pid, + if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, NLM_F_MULTI, netdev, dst, next_hop, &pinfo) < 0) @@ -3438,7 +3438,7 @@ static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info) if (!msg) return -ENOMEM; - if (nl80211_send_mpath(msg, info->snd_pid, info->snd_seq, 0, + if (nl80211_send_mpath(msg, info->snd_portid, info->snd_seq, 0, dev, dst, next_hop, &pinfo) < 0) { nlmsg_free(msg); return -ENOBUFS; @@ -3679,7 +3679,7 @@ static int nl80211_get_mesh_config(struct sk_buff *skb, msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); if (!msg) return -ENOMEM; - hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0, + hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0, NL80211_CMD_GET_MESH_CONFIG); if (!hdr) goto out; @@ -3998,7 +3998,7 @@ static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info) goto out; } - hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0, + hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0, NL80211_CMD_GET_REG); if (!hdr) goto put_failure; @@ -4616,7 +4616,7 @@ static int nl80211_send_bss(struct sk_buff *msg, struct netlink_callback *cb, ASSERT_WDEV_LOCK(wdev); - hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).pid, seq, flags, + hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).portid, seq, flags, NL80211_CMD_NEW_SCAN_RESULTS); if (!hdr) return -1; @@ -4735,14 +4735,14 @@ static int nl80211_dump_scan(struct sk_buff *skb, return skb->len; } -static int nl80211_send_survey(struct sk_buff *msg, u32 pid, u32 seq, +static int nl80211_send_survey(struct sk_buff *msg, u32 portid, u32 seq, int flags, struct net_device *dev, struct survey_info *survey) { void *hdr; struct nlattr *infoattr; - hdr = nl80211hdr_put(msg, pid, seq, flags, + hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_SURVEY_RESULTS); if (!hdr) return -ENOMEM; @@ -4836,7 +4836,7 @@ static int nl80211_dump_survey(struct sk_buff *skb, } if (nl80211_send_survey(skb, - NETLINK_CB(cb->skb).pid, + NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, NLM_F_MULTI, netdev, &survey) < 0) @@ -5451,7 +5451,7 @@ static int nl80211_testmode_dump(struct sk_buff *skb, } while (1) { - void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).pid, + void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, NLM_F_MULTI, NL80211_CMD_TESTMODE); struct nlattr *tmdata; @@ -5491,7 +5491,7 @@ static int nl80211_testmode_dump(struct sk_buff *skb, static struct sk_buff * __cfg80211_testmode_alloc_skb(struct cfg80211_registered_device *rdev, - int approxlen, u32 pid, u32 seq, gfp_t gfp) + int approxlen, u32 portid, u32 seq, gfp_t gfp) { struct sk_buff *skb; void *hdr; @@ -5501,7 +5501,7 @@ __cfg80211_testmode_alloc_skb(struct cfg80211_registered_device *rdev, if (!skb) return NULL; - hdr = nl80211hdr_put(skb, pid, seq, 0, NL80211_CMD_TESTMODE); + hdr = nl80211hdr_put(skb, portid, seq, 0, NL80211_CMD_TESTMODE); if (!hdr) { kfree_skb(skb); return NULL; @@ -5531,7 +5531,7 @@ struct sk_buff *cfg80211_testmode_alloc_reply_skb(struct wiphy *wiphy, return NULL; return __cfg80211_testmode_alloc_skb(rdev, approxlen, - rdev->testmode_info->snd_pid, + rdev->testmode_info->snd_portid, rdev->testmode_info->snd_seq, GFP_KERNEL); } @@ -5867,7 +5867,7 @@ static int nl80211_remain_on_channel(struct sk_buff *skb, if (!msg) return -ENOMEM; - hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0, + hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0, NL80211_CMD_REMAIN_ON_CHANNEL); if (IS_ERR(hdr)) { @@ -6086,7 +6086,7 @@ static int nl80211_register_mgmt(struct sk_buff *skb, struct genl_info *info) if (!rdev->ops->mgmt_tx) return -EOPNOTSUPP; - return cfg80211_mlme_register_mgmt(wdev, info->snd_pid, frame_type, + return cfg80211_mlme_register_mgmt(wdev, info->snd_portid, frame_type, nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]), nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH])); } @@ -6167,7 +6167,7 @@ static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info) if (!msg) return -ENOMEM; - hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0, + hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0, NL80211_CMD_FRAME); if (IS_ERR(hdr)) { @@ -6284,7 +6284,7 @@ static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info) if (!msg) return -ENOMEM; - hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0, + hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0, NL80211_CMD_GET_POWER_SAVE); if (!hdr) { err = -ENOBUFS; @@ -6486,7 +6486,7 @@ static int nl80211_get_wowlan(struct sk_buff *skb, struct genl_info *info) if (!msg) return -ENOMEM; - hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0, + hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0, NL80211_CMD_GET_WOWLAN); if (!hdr) goto nla_put_failure; @@ -6760,10 +6760,10 @@ static int nl80211_register_unexpected_frame(struct sk_buff *skb, wdev->iftype != NL80211_IFTYPE_P2P_GO) return -EINVAL; - if (wdev->ap_unexpected_nlpid) + if (wdev->ap_unexpected_nlportid) return -EBUSY; - wdev->ap_unexpected_nlpid = info->snd_pid; + wdev->ap_unexpected_nlportid = info->snd_portid; return 0; } @@ -6793,7 +6793,7 @@ static int nl80211_probe_client(struct sk_buff *skb, if (!msg) return -ENOMEM; - hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0, + hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0, NL80211_CMD_PROBE_CLIENT); if (IS_ERR(hdr)) { @@ -6828,10 +6828,10 @@ static int nl80211_register_beacons(struct sk_buff *skb, struct genl_info *info) if (!(rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS)) return -EOPNOTSUPP; - if (rdev->ap_beacons_nlpid) + if (rdev->ap_beacons_nlportid) return -EBUSY; - rdev->ap_beacons_nlpid = info->snd_pid; + rdev->ap_beacons_nlportid = info->snd_portid; return 0; } @@ -7628,12 +7628,12 @@ static int nl80211_add_scan_req(struct sk_buff *msg, static int nl80211_send_scan_msg(struct sk_buff *msg, struct cfg80211_registered_device *rdev, struct wireless_dev *wdev, - u32 pid, u32 seq, int flags, + u32 portid, u32 seq, int flags, u32 cmd) { void *hdr; - hdr = nl80211hdr_put(msg, pid, seq, flags, cmd); + hdr = nl80211hdr_put(msg, portid, seq, flags, cmd); if (!hdr) return -1; @@ -7657,11 +7657,11 @@ static int nl80211_send_sched_scan_msg(struct sk_buff *msg, struct cfg80211_registered_device *rdev, struct net_device *netdev, - u32 pid, u32 seq, int flags, u32 cmd) + u32 portid, u32 seq, int flags, u32 cmd) { void *hdr; - hdr = nl80211hdr_put(msg, pid, seq, flags, cmd); + hdr = nl80211hdr_put(msg, portid, seq, flags, cmd); if (!hdr) return -1; @@ -8370,9 +8370,9 @@ static bool __nl80211_unexpected_frame(struct net_device *dev, u8 cmd, struct sk_buff *msg; void *hdr; int err; - u32 nlpid = ACCESS_ONCE(wdev->ap_unexpected_nlpid); + u32 nlportid = ACCESS_ONCE(wdev->ap_unexpected_nlportid); - if (!nlpid) + if (!nlportid) return false; msg = nlmsg_new(100, gfp); @@ -8396,7 +8396,7 @@ static bool __nl80211_unexpected_frame(struct net_device *dev, u8 cmd, return true; } - genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlpid); + genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid); return true; nla_put_failure: @@ -8420,7 +8420,7 @@ bool nl80211_unexpected_4addr_frame(struct net_device *dev, } int nl80211_send_mgmt(struct cfg80211_registered_device *rdev, - struct wireless_dev *wdev, u32 nlpid, + struct wireless_dev *wdev, u32 nlportid, int freq, int sig_dbm, const u8 *buf, size_t len, gfp_t gfp) { @@ -8449,7 +8449,7 @@ int nl80211_send_mgmt(struct cfg80211_registered_device *rdev, genlmsg_end(msg, hdr); - return genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlpid); + return genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid); nla_put_failure: genlmsg_cancel(msg, hdr); @@ -8804,9 +8804,9 @@ void cfg80211_report_obss_beacon(struct wiphy *wiphy, struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); struct sk_buff *msg; void *hdr; - u32 nlpid = ACCESS_ONCE(rdev->ap_beacons_nlpid); + u32 nlportid = ACCESS_ONCE(rdev->ap_beacons_nlportid); - if (!nlpid) + if (!nlportid) return; msg = nlmsg_new(len + 100, gfp); @@ -8829,7 +8829,7 @@ void cfg80211_report_obss_beacon(struct wiphy *wiphy, genlmsg_end(msg, hdr); - genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlpid); + genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid); return; nla_put_failure: @@ -8853,9 +8853,9 @@ static int nl80211_netlink_notify(struct notifier_block * nb, list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list) { list_for_each_entry_rcu(wdev, &rdev->wdev_list, list) - cfg80211_mlme_unregister_socket(wdev, notify->pid); - if (rdev->ap_beacons_nlpid == notify->pid) - rdev->ap_beacons_nlpid = 0; + cfg80211_mlme_unregister_socket(wdev, notify->portid); + if (rdev->ap_beacons_nlportid == notify->portid) + rdev->ap_beacons_nlportid = 0; } rcu_read_unlock(); -- cgit v1.2.2