* [PATCH 0/5] genetlink improvements
@ 2016-10-24 12:40 Johannes Berg
2016-10-24 12:40 ` [PATCH 1/5] genetlink: introduce and use genl_family_attrbuf() Johannes Berg
` (6 more replies)
0 siblings, 7 replies; 22+ messages in thread
From: Johannes Berg @ 2016-10-24 12:40 UTC (permalink / raw)
To: netdev
This series contains some generic netlink improvements, making
the API safer to use, and making the function pointers in the
family struct safer by allowing it to be __ro_after_init.
The first patch, introducing genl_family_attrbuf(), just ensures
that the users of family->attrbuf aren't actually racy, but making
them use the indirection function for obtaining a reference and
checking that the context can actually do so.
The second patch removes the more or less broken ability to have
a static family ID, the three IDs that need to be static because
it's simply needed (genl controller), or due to old API misused.
Everything else couldn't be static anyway, or could fail when the
family is registered, if somebody else already got a static ID.
The third patch statically initializes the families, mostly to save
some code. I wrote this initially because I thought I could make
them all const, but that ends up being very inefficient (it would
require always doing some kind of family -> id lookup), so now it's
just here because I had it already and it reduces the code size.
The fourth patch then, finally, lays the groundwork for what I had
really wanted - now with __ro_after_init instead of const; I remove
code there to do the ID->family hash table mapping in genetlink and
use IDR instead to both allocate and map the IDs, which again ends
up saving some code size.
Finally, the fifth patch updates all families, as it turns out, no
families exist that really dynamically register/unregister. This
last patch should perhaps be split up, I could submit it for each
subsystem separately, but it'd depend on the second and third to
go in first, so would take a while. I can do that though, if that
seems better to you.
johannes
^ permalink raw reply [flat|nested] 22+ messages in thread
* [PATCH 1/5] genetlink: introduce and use genl_family_attrbuf()
2016-10-24 12:40 [PATCH 0/5] genetlink improvements Johannes Berg
@ 2016-10-24 12:40 ` Johannes Berg
2016-10-24 12:40 ` [PATCH 2/5] genetlink: no longer support using static family IDs Johannes Berg
` (5 subsequent siblings)
6 siblings, 0 replies; 22+ messages in thread
From: Johannes Berg @ 2016-10-24 12:40 UTC (permalink / raw)
To: netdev; +Cc: Johannes Berg
From: Johannes Berg <johannes.berg@intel.com>
This helper function allows family implementations to access
their family's attrbuf. This gets rid of the attrbuf usage
in families, and also adds locking validation, since it's not
valid to use the attrbuf with parallel_ops or outside of the
dumpit callback.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
---
include/net/genetlink.h | 2 ++
net/ieee802154/nl802154.c | 7 ++++---
net/netlink/genetlink.c | 19 ++++++++++++++++++
net/nfc/netlink.c | 9 ++++-----
net/tipc/netlink.c | 2 +-
net/wireless/nl80211.c | 51 +++++++++++++++++++++++------------------------
6 files changed, 55 insertions(+), 35 deletions(-)
diff --git a/include/net/genetlink.h b/include/net/genetlink.h
index 8d4608ce8716..ef9defb3f5bc 100644
--- a/include/net/genetlink.h
+++ b/include/net/genetlink.h
@@ -73,6 +73,8 @@ struct genl_family {
struct module *module;
};
+struct nlattr **genl_family_attrbuf(struct genl_family *family);
+
/**
* struct genl_info - receiving information
* @snd_seq: sending sequence number
diff --git a/net/ieee802154/nl802154.c b/net/ieee802154/nl802154.c
index d90a4ed5b8a0..21aabadccd0e 100644
--- a/net/ieee802154/nl802154.c
+++ b/net/ieee802154/nl802154.c
@@ -263,13 +263,14 @@ nl802154_prepare_wpan_dev_dump(struct sk_buff *skb,
if (!cb->args[0]) {
err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl802154_fam.hdrsize,
- nl802154_fam.attrbuf, nl802154_fam.maxattr,
+ genl_family_attrbuf(&nl802154_fam),
+ nl802154_fam.maxattr,
nl802154_policy);
if (err)
goto out_unlock;
*wpan_dev = __cfg802154_wpan_dev_from_attrs(sock_net(skb->sk),
- nl802154_fam.attrbuf);
+ genl_family_attrbuf(&nl802154_fam));
if (IS_ERR(*wpan_dev)) {
err = PTR_ERR(*wpan_dev);
goto out_unlock;
@@ -575,7 +576,7 @@ static int nl802154_dump_wpan_phy_parse(struct sk_buff *skb,
struct netlink_callback *cb,
struct nl802154_dump_wpan_phy_state *state)
{
- struct nlattr **tb = nl802154_fam.attrbuf;
+ struct nlattr **tb = genl_family_attrbuf(&nl802154_fam);
int ret = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl802154_fam.hdrsize,
tb, nl802154_fam.maxattr, nl802154_policy);
diff --git a/net/netlink/genetlink.c b/net/netlink/genetlink.c
index 23cc12639ba7..01291b7a27bb 100644
--- a/net/netlink/genetlink.c
+++ b/net/netlink/genetlink.c
@@ -1096,6 +1096,25 @@ static int __init genl_init(void)
subsys_initcall(genl_init);
+/**
+ * genl_family_attrbuf - return family's attrbuf
+ * @family: the family
+ *
+ * Return the family's attrbuf, while validating that it's
+ * actually valid to access it.
+ *
+ * You cannot use this function with a family that has parallel_ops
+ * and you can only use it within (pre/post) doit/dumpit callbacks.
+ */
+struct nlattr **genl_family_attrbuf(struct genl_family *family)
+{
+ if (!WARN_ON(family->parallel_ops))
+ lockdep_assert_held(&genl_mutex);
+
+ return family->attrbuf;
+}
+EXPORT_SYMBOL(genl_family_attrbuf);
+
static int genlmsg_mcast(struct sk_buff *skb, u32 portid, unsigned long group,
gfp_t flags)
{
diff --git a/net/nfc/netlink.c b/net/nfc/netlink.c
index ea023b35f1c2..79786bf62b88 100644
--- a/net/nfc/netlink.c
+++ b/net/nfc/netlink.c
@@ -120,21 +120,20 @@ static int nfc_genl_send_target(struct sk_buff *msg, struct nfc_target *target,
static struct nfc_dev *__get_device_from_cb(struct netlink_callback *cb)
{
+ struct nlattr **attrbuf = genl_family_attrbuf(&nfc_genl_family);
struct nfc_dev *dev;
int rc;
u32 idx;
rc = nlmsg_parse(cb->nlh, GENL_HDRLEN + nfc_genl_family.hdrsize,
- nfc_genl_family.attrbuf,
- nfc_genl_family.maxattr,
- nfc_genl_policy);
+ attrbuf, nfc_genl_family.maxattr, nfc_genl_policy);
if (rc < 0)
return ERR_PTR(rc);
- if (!nfc_genl_family.attrbuf[NFC_ATTR_DEVICE_INDEX])
+ if (!attrbuf[NFC_ATTR_DEVICE_INDEX])
return ERR_PTR(-EINVAL);
- idx = nla_get_u32(nfc_genl_family.attrbuf[NFC_ATTR_DEVICE_INDEX]);
+ idx = nla_get_u32(attrbuf[NFC_ATTR_DEVICE_INDEX]);
dev = nfc_get_device(idx);
if (!dev)
diff --git a/net/tipc/netlink.c b/net/tipc/netlink.c
index 3200059d14b2..4b94f3cfe3af 100644
--- a/net/tipc/netlink.c
+++ b/net/tipc/netlink.c
@@ -262,7 +262,7 @@ int tipc_nlmsg_parse(const struct nlmsghdr *nlh, struct nlattr ***attr)
{
u32 maxattr = tipc_genl_family.maxattr;
- *attr = tipc_genl_family.attrbuf;
+ *attr = genl_family_attrbuf(&tipc_genl_family);
if (!*attr)
return -EOPNOTSUPP;
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index c510810f0b7c..7d8cb3330c86 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -551,13 +551,14 @@ static int nl80211_prepare_wdev_dump(struct sk_buff *skb,
if (!cb->args[0]) {
err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
- nl80211_fam.attrbuf, nl80211_fam.maxattr,
- nl80211_policy);
+ genl_family_attrbuf(&nl80211_fam),
+ nl80211_fam.maxattr, nl80211_policy);
if (err)
goto out_unlock;
- *wdev = __cfg80211_wdev_from_attrs(sock_net(skb->sk),
- nl80211_fam.attrbuf);
+ *wdev = __cfg80211_wdev_from_attrs(
+ sock_net(skb->sk),
+ genl_family_attrbuf(&nl80211_fam));
if (IS_ERR(*wdev)) {
err = PTR_ERR(*wdev);
goto out_unlock;
@@ -1881,7 +1882,7 @@ static int nl80211_dump_wiphy_parse(struct sk_buff *skb,
struct netlink_callback *cb,
struct nl80211_dump_wiphy_state *state)
{
- struct nlattr **tb = nl80211_fam.attrbuf;
+ struct nlattr **tb = genl_family_attrbuf(&nl80211_fam);
int ret = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
tb, nl80211_fam.maxattr, nl80211_policy);
/* ignore parse errors for backward compatibility */
@@ -7643,6 +7644,7 @@ static int nl80211_send_survey(struct sk_buff *msg, u32 portid, u32 seq,
static int nl80211_dump_survey(struct sk_buff *skb, struct netlink_callback *cb)
{
+ struct nlattr **attrbuf = genl_family_attrbuf(&nl80211_fam);
struct survey_info survey;
struct cfg80211_registered_device *rdev;
struct wireless_dev *wdev;
@@ -7655,7 +7657,7 @@ static int nl80211_dump_survey(struct sk_buff *skb, struct netlink_callback *cb)
return res;
/* prepare_wdev_dump parsed the attributes */
- radio_stats = nl80211_fam.attrbuf[NL80211_ATTR_SURVEY_RADIO_STATS];
+ radio_stats = attrbuf[NL80211_ATTR_SURVEY_RADIO_STATS];
if (!wdev->netdev) {
res = -EINVAL;
@@ -8478,14 +8480,14 @@ static int nl80211_testmode_dump(struct sk_buff *skb,
*/
phy_idx = cb->args[0] - 1;
} else {
+ struct nlattr **attrbuf = genl_family_attrbuf(&nl80211_fam);
+
err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
- nl80211_fam.attrbuf, nl80211_fam.maxattr,
- nl80211_policy);
+ attrbuf, nl80211_fam.maxattr, nl80211_policy);
if (err)
goto out_err;
- rdev = __cfg80211_rdev_from_attrs(sock_net(skb->sk),
- nl80211_fam.attrbuf);
+ rdev = __cfg80211_rdev_from_attrs(sock_net(skb->sk), attrbuf);
if (IS_ERR(rdev)) {
err = PTR_ERR(rdev);
goto out_err;
@@ -8493,9 +8495,8 @@ static int nl80211_testmode_dump(struct sk_buff *skb,
phy_idx = rdev->wiphy_idx;
rdev = NULL;
- if (nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA])
- cb->args[1] =
- (long)nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA];
+ if (attrbuf[NL80211_ATTR_TESTDATA])
+ cb->args[1] = (long)attrbuf[NL80211_ATTR_TESTDATA];
}
if (cb->args[1]) {
@@ -11277,6 +11278,7 @@ static int nl80211_prepare_vendor_dump(struct sk_buff *skb,
struct cfg80211_registered_device **rdev,
struct wireless_dev **wdev)
{
+ struct nlattr **attrbuf = genl_family_attrbuf(&nl80211_fam);
u32 vid, subcmd;
unsigned int i;
int vcmd_idx = -1;
@@ -11312,31 +11314,28 @@ static int nl80211_prepare_vendor_dump(struct sk_buff *skb,
}
err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
- nl80211_fam.attrbuf, nl80211_fam.maxattr,
- nl80211_policy);
+ attrbuf, nl80211_fam.maxattr, nl80211_policy);
if (err)
goto out_unlock;
- if (!nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_ID] ||
- !nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_SUBCMD]) {
+ if (!attrbuf[NL80211_ATTR_VENDOR_ID] ||
+ !attrbuf[NL80211_ATTR_VENDOR_SUBCMD]) {
err = -EINVAL;
goto out_unlock;
}
- *wdev = __cfg80211_wdev_from_attrs(sock_net(skb->sk),
- nl80211_fam.attrbuf);
+ *wdev = __cfg80211_wdev_from_attrs(sock_net(skb->sk), attrbuf);
if (IS_ERR(*wdev))
*wdev = NULL;
- *rdev = __cfg80211_rdev_from_attrs(sock_net(skb->sk),
- nl80211_fam.attrbuf);
+ *rdev = __cfg80211_rdev_from_attrs(sock_net(skb->sk), attrbuf);
if (IS_ERR(*rdev)) {
err = PTR_ERR(*rdev);
goto out_unlock;
}
- vid = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_ID]);
- subcmd = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_SUBCMD]);
+ vid = nla_get_u32(attrbuf[NL80211_ATTR_VENDOR_ID]);
+ subcmd = nla_get_u32(attrbuf[NL80211_ATTR_VENDOR_SUBCMD]);
for (i = 0; i < (*rdev)->wiphy.n_vendor_commands; i++) {
const struct wiphy_vendor_command *vcmd;
@@ -11360,9 +11359,9 @@ static int nl80211_prepare_vendor_dump(struct sk_buff *skb,
goto out_unlock;
}
- if (nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_DATA]) {
- data = nla_data(nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_DATA]);
- data_len = nla_len(nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_DATA]);
+ if (attrbuf[NL80211_ATTR_VENDOR_DATA]) {
+ data = nla_data(attrbuf[NL80211_ATTR_VENDOR_DATA]);
+ data_len = nla_len(attrbuf[NL80211_ATTR_VENDOR_DATA]);
}
/* 0 is the first index - add 1 to parse only once */
--
2.8.1
^ permalink raw reply related [flat|nested] 22+ messages in thread
* [PATCH 2/5] genetlink: no longer support using static family IDs
2016-10-24 12:40 [PATCH 0/5] genetlink improvements Johannes Berg
2016-10-24 12:40 ` [PATCH 1/5] genetlink: introduce and use genl_family_attrbuf() Johannes Berg
@ 2016-10-24 12:40 ` Johannes Berg
2016-10-24 12:40 ` [PATCH 3/5] genetlink: statically initialize families Johannes Berg
` (4 subsequent siblings)
6 siblings, 0 replies; 22+ messages in thread
From: Johannes Berg @ 2016-10-24 12:40 UTC (permalink / raw)
To: netdev; +Cc: Johannes Berg
From: Johannes Berg <johannes.berg@intel.com>
Static family IDs have never really been used, the only
use case was the workaround I introduced for those users
that assumed their family ID was also their multicast
group ID.
Additionally, because static family IDs would never be
reserved by the generic netlink code, using a relatively
low ID would only work for built-in families that can be
registered immediately after generic netlink is started,
which is basically only the control family (apart from
the workaround code, which I also had to add code for so
it would reserve those IDs)
Thus, anything other than GENL_ID_GENERATE is flawed and
luckily not used except in the cases I mentioned. Move
those workarounds into a few lines of code, and then get
rid of GENL_ID_GENERATE entirely, making it more robust.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
---
drivers/acpi/event.c | 1 -
drivers/net/gtp.c | 1 -
drivers/net/macsec.c | 1 -
drivers/net/team/team.c | 1 -
drivers/net/wireless/mac80211_hwsim.c | 1 -
drivers/scsi/pmcraid.c | 6 ------
drivers/target/target_core_user.c | 1 -
drivers/thermal/thermal_core.c | 1 -
fs/dlm/netlink.c | 1 -
fs/quota/netlink.c | 7 -------
include/linux/genl_magic_func.h | 1 -
include/net/genetlink.h | 7 ++-----
include/uapi/linux/genetlink.h | 1 -
kernel/taskstats.c | 1 -
net/batman-adv/netlink.c | 1 -
net/core/devlink.c | 1 -
net/core/drop_monitor.c | 1 -
net/hsr/hsr_netlink.c | 1 -
net/ieee802154/netlink.c | 1 -
net/ieee802154/nl802154.c | 1 -
net/ipv4/fou.c | 1 -
net/ipv4/tcp_metrics.c | 1 -
net/ipv6/ila/ila_xlat.c | 1 -
net/irda/irnetlink.c | 1 -
net/l2tp/l2tp_netlink.c | 1 -
net/netfilter/ipvs/ip_vs_ctl.c | 1 -
net/netlabel/netlabel_calipso.c | 1 -
net/netlabel/netlabel_cipso_v4.c | 1 -
net/netlabel/netlabel_mgmt.c | 1 -
net/netlabel/netlabel_unlabeled.c | 1 -
net/netlink/genetlink.c | 37 +++++++++++++++++++++--------------
net/nfc/netlink.c | 1 -
net/openvswitch/datapath.c | 4 ----
net/tipc/netlink.c | 1 -
net/tipc/netlink_compat.c | 1 -
net/wimax/stack.c | 1 -
net/wireless/nl80211.c | 1 -
37 files changed, 24 insertions(+), 69 deletions(-)
diff --git a/drivers/acpi/event.c b/drivers/acpi/event.c
index e24ea4e796e4..8dfca3d53131 100644
--- a/drivers/acpi/event.c
+++ b/drivers/acpi/event.c
@@ -83,7 +83,6 @@ static const struct genl_multicast_group acpi_event_mcgrps[] = {
};
static struct genl_family acpi_event_genl_family = {
- .id = GENL_ID_GENERATE,
.name = ACPI_GENL_FAMILY_NAME,
.version = ACPI_GENL_VERSION,
.maxattr = ACPI_GENL_ATTR_MAX,
diff --git a/drivers/net/gtp.c b/drivers/net/gtp.c
index 97e0cbca0a08..f66737ba1299 100644
--- a/drivers/net/gtp.c
+++ b/drivers/net/gtp.c
@@ -1095,7 +1095,6 @@ static int gtp_genl_del_pdp(struct sk_buff *skb, struct genl_info *info)
}
static struct genl_family gtp_genl_family = {
- .id = GENL_ID_GENERATE,
.name = "gtp",
.version = 0,
.hdrsize = 0,
diff --git a/drivers/net/macsec.c b/drivers/net/macsec.c
index 1a134cb2d52c..a5309b81a786 100644
--- a/drivers/net/macsec.c
+++ b/drivers/net/macsec.c
@@ -1422,7 +1422,6 @@ static void clear_tx_sa(struct macsec_tx_sa *tx_sa)
}
static struct genl_family macsec_fam = {
- .id = GENL_ID_GENERATE,
.name = MACSEC_GENL_NAME,
.hdrsize = 0,
.version = MACSEC_GENL_VERSION,
diff --git a/drivers/net/team/team.c b/drivers/net/team/team.c
index a380649bf6b5..0b50205764ff 100644
--- a/drivers/net/team/team.c
+++ b/drivers/net/team/team.c
@@ -2151,7 +2151,6 @@ static struct rtnl_link_ops team_link_ops __read_mostly = {
***********************************/
static struct genl_family team_nl_family = {
- .id = GENL_ID_GENERATE,
.name = TEAM_GENL_NAME,
.version = TEAM_GENL_VERSION,
.maxattr = TEAM_ATTR_MAX,
diff --git a/drivers/net/wireless/mac80211_hwsim.c b/drivers/net/wireless/mac80211_hwsim.c
index e95b79bccf9b..54b6cd62676e 100644
--- a/drivers/net/wireless/mac80211_hwsim.c
+++ b/drivers/net/wireless/mac80211_hwsim.c
@@ -589,7 +589,6 @@ struct hwsim_radiotap_ack_hdr {
/* MAC80211_HWSIM netlinf family */
static struct genl_family hwsim_genl_family = {
- .id = GENL_ID_GENERATE,
.hdrsize = 0,
.name = "MAC80211_HWSIM",
.version = 1,
diff --git a/drivers/scsi/pmcraid.c b/drivers/scsi/pmcraid.c
index 68a5c347fae9..cc50eb87b28a 100644
--- a/drivers/scsi/pmcraid.c
+++ b/drivers/scsi/pmcraid.c
@@ -1369,12 +1369,6 @@ static struct genl_multicast_group pmcraid_mcgrps[] = {
};
static struct genl_family pmcraid_event_family = {
- /*
- * Due to prior multicast group abuse (the code having assumed that
- * the family ID can be used as a multicast group ID) we need to
- * statically allocate a family (and thus group) ID.
- */
- .id = GENL_ID_PMCRAID,
.name = "pmcraid",
.version = 1,
.maxattr = PMCRAID_AEN_ATTR_MAX,
diff --git a/drivers/target/target_core_user.c b/drivers/target/target_core_user.c
index 62bf4fe5704a..313a0ef3cda7 100644
--- a/drivers/target/target_core_user.c
+++ b/drivers/target/target_core_user.c
@@ -148,7 +148,6 @@ static const struct genl_multicast_group tcmu_mcgrps[] = {
/* Our generic netlink family */
static struct genl_family tcmu_genl_family = {
- .id = GENL_ID_GENERATE,
.hdrsize = 0,
.name = "TCM-USER",
.version = 1,
diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c
index 226b0b4aced6..68d7503f6417 100644
--- a/drivers/thermal/thermal_core.c
+++ b/drivers/thermal/thermal_core.c
@@ -2164,7 +2164,6 @@ static const struct genl_multicast_group thermal_event_mcgrps[] = {
};
static struct genl_family thermal_event_genl_family = {
- .id = GENL_ID_GENERATE,
.name = THERMAL_GENL_FAMILY_NAME,
.version = THERMAL_GENL_VERSION,
.maxattr = THERMAL_GENL_ATTR_MAX,
diff --git a/fs/dlm/netlink.c b/fs/dlm/netlink.c
index 1e6e227134d7..00d226956264 100644
--- a/fs/dlm/netlink.c
+++ b/fs/dlm/netlink.c
@@ -17,7 +17,6 @@ static uint32_t dlm_nl_seqnum;
static uint32_t listener_nlportid;
static struct genl_family family = {
- .id = GENL_ID_GENERATE,
.name = DLM_GENL_NAME,
.version = DLM_GENL_VERSION,
};
diff --git a/fs/quota/netlink.c b/fs/quota/netlink.c
index 8b252673d454..3965a5cdfaa2 100644
--- a/fs/quota/netlink.c
+++ b/fs/quota/netlink.c
@@ -13,13 +13,6 @@ static const struct genl_multicast_group quota_mcgrps[] = {
/* Netlink family structure for quota */
static struct genl_family quota_genl_family = {
- /*
- * Needed due to multicast group ID abuse - old code assumed
- * the family ID was also a valid multicast group ID (which
- * isn't true) and userspace might thus rely on it. Assign a
- * static ID for this group to make dealing with that easier.
- */
- .id = GENL_ID_VFS_DQUOT,
.hdrsize = 0,
.name = "VFS_DQUOT",
.version = 1,
diff --git a/include/linux/genl_magic_func.h b/include/linux/genl_magic_func.h
index 667c31101b8b..7c070c1fe457 100644
--- a/include/linux/genl_magic_func.h
+++ b/include/linux/genl_magic_func.h
@@ -260,7 +260,6 @@ static struct genl_ops ZZZ_genl_ops[] __read_mostly = {
*/
#define ZZZ_genl_family CONCAT_(GENL_MAGIC_FAMILY, _genl_family)
static struct genl_family ZZZ_genl_family __read_mostly = {
- .id = GENL_ID_GENERATE,
.name = __stringify(GENL_MAGIC_FAMILY),
.version = GENL_MAGIC_VERSION,
#ifdef GENL_MAGIC_FAMILY_HDRSZ
diff --git a/include/net/genetlink.h b/include/net/genetlink.h
index ef9defb3f5bc..43a5c3975a2f 100644
--- a/include/net/genetlink.h
+++ b/include/net/genetlink.h
@@ -20,7 +20,7 @@ struct genl_info;
/**
* struct genl_family - generic netlink family
- * @id: protocol family idenfitier
+ * @id: protocol family identifier (private)
* @hdrsize: length of user specific header in bytes
* @name: name of family
* @version: protocol version
@@ -48,7 +48,7 @@ struct genl_info;
* @n_ops: number of operations supported by this family (private)
*/
struct genl_family {
- unsigned int id;
+ unsigned int id; /* private */
unsigned int hdrsize;
char name[GENL_NAMSIZ];
unsigned int version;
@@ -149,9 +149,6 @@ static inline int genl_register_family(struct genl_family *family)
* Registers the specified family and operations from the specified table.
* Only one family may be registered with the same family name or identifier.
*
- * The family id may equal GENL_ID_GENERATE causing an unique id to
- * be automatically generated and assigned.
- *
* Either a doit or dumpit callback must be specified for every registered
* operation or the function will fail. Only one operation structure per
* command identifier may be registered.
diff --git a/include/uapi/linux/genetlink.h b/include/uapi/linux/genetlink.h
index 5512c90af7e3..d9b2db4a29c6 100644
--- a/include/uapi/linux/genetlink.h
+++ b/include/uapi/linux/genetlink.h
@@ -26,7 +26,6 @@ struct genlmsghdr {
/*
* List of reserved static generic netlink identifiers:
*/
-#define GENL_ID_GENERATE 0
#define GENL_ID_CTRL NLMSG_MIN_TYPE
#define GENL_ID_VFS_DQUOT (NLMSG_MIN_TYPE + 1)
#define GENL_ID_PMCRAID (NLMSG_MIN_TYPE + 2)
diff --git a/kernel/taskstats.c b/kernel/taskstats.c
index b3f05ee20d18..d7a1a9461a10 100644
--- a/kernel/taskstats.c
+++ b/kernel/taskstats.c
@@ -42,7 +42,6 @@ static int family_registered;
struct kmem_cache *taskstats_cache;
static struct genl_family family = {
- .id = GENL_ID_GENERATE,
.name = TASKSTATS_GENL_NAME,
.version = TASKSTATS_GENL_VERSION,
.maxattr = TASKSTATS_CMD_ATTR_MAX,
diff --git a/net/batman-adv/netlink.c b/net/batman-adv/netlink.c
index 64cb6acbe0a6..a03b0ed7e8dd 100644
--- a/net/batman-adv/netlink.c
+++ b/net/batman-adv/netlink.c
@@ -49,7 +49,6 @@
#include "translation-table.h"
struct genl_family batadv_netlink_family = {
- .id = GENL_ID_GENERATE,
.hdrsize = 0,
.name = BATADV_NL_NAME,
.version = 1,
diff --git a/net/core/devlink.c b/net/core/devlink.c
index 1b5063088f1a..701d61eab9a7 100644
--- a/net/core/devlink.c
+++ b/net/core/devlink.c
@@ -342,7 +342,6 @@ static void devlink_nl_post_doit(const struct genl_ops *ops,
}
static struct genl_family devlink_nl_family = {
- .id = GENL_ID_GENERATE,
.name = DEVLINK_GENL_NAME,
.version = DEVLINK_GENL_VERSION,
.maxattr = DEVLINK_ATTR_MAX,
diff --git a/net/core/drop_monitor.c b/net/core/drop_monitor.c
index 72cfb0c61125..a5320dfcd978 100644
--- a/net/core/drop_monitor.c
+++ b/net/core/drop_monitor.c
@@ -60,7 +60,6 @@ struct dm_hw_stat_delta {
};
static struct genl_family net_drop_monitor_family = {
- .id = GENL_ID_GENERATE,
.hdrsize = 0,
.name = "NET_DM",
.version = 2,
diff --git a/net/hsr/hsr_netlink.c b/net/hsr/hsr_netlink.c
index d4d1617f43a8..2ad039492bee 100644
--- a/net/hsr/hsr_netlink.c
+++ b/net/hsr/hsr_netlink.c
@@ -132,7 +132,6 @@ static const struct nla_policy hsr_genl_policy[HSR_A_MAX + 1] = {
};
static struct genl_family hsr_genl_family = {
- .id = GENL_ID_GENERATE,
.hdrsize = 0,
.name = "HSR",
.version = 1,
diff --git a/net/ieee802154/netlink.c b/net/ieee802154/netlink.c
index c8133c07ceee..19144158b696 100644
--- a/net/ieee802154/netlink.c
+++ b/net/ieee802154/netlink.c
@@ -29,7 +29,6 @@ static unsigned int ieee802154_seq_num;
static DEFINE_SPINLOCK(ieee802154_seq_lock);
struct genl_family nl802154_family = {
- .id = GENL_ID_GENERATE,
.hdrsize = 0,
.name = IEEE802154_NL_NAME,
.version = 1,
diff --git a/net/ieee802154/nl802154.c b/net/ieee802154/nl802154.c
index 21aabadccd0e..182299858f1d 100644
--- a/net/ieee802154/nl802154.c
+++ b/net/ieee802154/nl802154.c
@@ -34,7 +34,6 @@ static void nl802154_post_doit(const struct genl_ops *ops, struct sk_buff *skb,
/* the netlink family */
static struct genl_family nl802154_fam = {
- .id = GENL_ID_GENERATE, /* don't bother with a hardcoded ID */
.name = NL802154_GENL_NAME, /* have users key off the name instead */
.hdrsize = 0, /* no private header */
.version = 1, /* no particular meaning now */
diff --git a/net/ipv4/fou.c b/net/ipv4/fou.c
index cf50f7e2b012..e3fc527c5d37 100644
--- a/net/ipv4/fou.c
+++ b/net/ipv4/fou.c
@@ -623,7 +623,6 @@ static int fou_destroy(struct net *net, struct fou_cfg *cfg)
}
static struct genl_family fou_nl_family = {
- .id = GENL_ID_GENERATE,
.hdrsize = 0,
.name = FOU_GENL_NAME,
.version = FOU_GENL_VERSION,
diff --git a/net/ipv4/tcp_metrics.c b/net/ipv4/tcp_metrics.c
index bf1f3b2b29d1..3da305127b32 100644
--- a/net/ipv4/tcp_metrics.c
+++ b/net/ipv4/tcp_metrics.c
@@ -743,7 +743,6 @@ void tcp_fastopen_cache_set(struct sock *sk, u16 mss,
}
static struct genl_family tcp_metrics_nl_family = {
- .id = GENL_ID_GENERATE,
.hdrsize = 0,
.name = TCP_METRICS_GENL_NAME,
.version = TCP_METRICS_GENL_VERSION,
diff --git a/net/ipv6/ila/ila_xlat.c b/net/ipv6/ila/ila_xlat.c
index e604013dd814..0d57e27d1cdd 100644
--- a/net/ipv6/ila/ila_xlat.c
+++ b/net/ipv6/ila/ila_xlat.c
@@ -119,7 +119,6 @@ static const struct rhashtable_params rht_params = {
};
static struct genl_family ila_nl_family = {
- .id = GENL_ID_GENERATE,
.hdrsize = 0,
.name = ILA_GENL_NAME,
.version = ILA_GENL_VERSION,
diff --git a/net/irda/irnetlink.c b/net/irda/irnetlink.c
index e15c40e86660..f23b81aa91fe 100644
--- a/net/irda/irnetlink.c
+++ b/net/irda/irnetlink.c
@@ -25,7 +25,6 @@
static struct genl_family irda_nl_family = {
- .id = GENL_ID_GENERATE,
.name = IRDA_NL_NAME,
.hdrsize = 0,
.version = IRDA_NL_VERSION,
diff --git a/net/l2tp/l2tp_netlink.c b/net/l2tp/l2tp_netlink.c
index bf3117771822..4fbf1f41ac52 100644
--- a/net/l2tp/l2tp_netlink.c
+++ b/net/l2tp/l2tp_netlink.c
@@ -32,7 +32,6 @@
static struct genl_family l2tp_nl_family = {
- .id = GENL_ID_GENERATE,
.name = L2TP_GENL_NAME,
.version = L2TP_GENL_VERSION,
.hdrsize = 0,
diff --git a/net/netfilter/ipvs/ip_vs_ctl.c b/net/netfilter/ipvs/ip_vs_ctl.c
index c3c809b2e712..ceed66cdd03e 100644
--- a/net/netfilter/ipvs/ip_vs_ctl.c
+++ b/net/netfilter/ipvs/ip_vs_ctl.c
@@ -2841,7 +2841,6 @@ static struct nf_sockopt_ops ip_vs_sockopts = {
/* IPVS genetlink family */
static struct genl_family ip_vs_genl_family = {
- .id = GENL_ID_GENERATE,
.hdrsize = 0,
.name = IPVS_GENL_NAME,
.version = IPVS_GENL_VERSION,
diff --git a/net/netlabel/netlabel_calipso.c b/net/netlabel/netlabel_calipso.c
index 2ec93c5e77bb..152e503b8c5d 100644
--- a/net/netlabel/netlabel_calipso.c
+++ b/net/netlabel/netlabel_calipso.c
@@ -61,7 +61,6 @@ struct netlbl_domhsh_walk_arg {
/* NetLabel Generic NETLINK CALIPSO family */
static struct genl_family netlbl_calipso_gnl_family = {
- .id = GENL_ID_GENERATE,
.hdrsize = 0,
.name = NETLBL_NLTYPE_CALIPSO_NAME,
.version = NETLBL_PROTO_VERSION,
diff --git a/net/netlabel/netlabel_cipso_v4.c b/net/netlabel/netlabel_cipso_v4.c
index 7fd1104ba900..755b284e7ad4 100644
--- a/net/netlabel/netlabel_cipso_v4.c
+++ b/net/netlabel/netlabel_cipso_v4.c
@@ -60,7 +60,6 @@ struct netlbl_domhsh_walk_arg {
/* NetLabel Generic NETLINK CIPSOv4 family */
static struct genl_family netlbl_cipsov4_gnl_family = {
- .id = GENL_ID_GENERATE,
.hdrsize = 0,
.name = NETLBL_NLTYPE_CIPSOV4_NAME,
.version = NETLBL_PROTO_VERSION,
diff --git a/net/netlabel/netlabel_mgmt.c b/net/netlabel/netlabel_mgmt.c
index f85d0e07af2d..3b00f2368fcd 100644
--- a/net/netlabel/netlabel_mgmt.c
+++ b/net/netlabel/netlabel_mgmt.c
@@ -61,7 +61,6 @@ struct netlbl_domhsh_walk_arg {
/* NetLabel Generic NETLINK CIPSOv4 family */
static struct genl_family netlbl_mgmt_gnl_family = {
- .id = GENL_ID_GENERATE,
.hdrsize = 0,
.name = NETLBL_NLTYPE_MGMT_NAME,
.version = NETLBL_PROTO_VERSION,
diff --git a/net/netlabel/netlabel_unlabeled.c b/net/netlabel/netlabel_unlabeled.c
index 4528cff9138b..c2ea8d1f653a 100644
--- a/net/netlabel/netlabel_unlabeled.c
+++ b/net/netlabel/netlabel_unlabeled.c
@@ -124,7 +124,6 @@ static u8 netlabel_unlabel_acceptflg;
/* NetLabel Generic NETLINK unlabeled family */
static struct genl_family netlbl_unlabel_gnl_family = {
- .id = GENL_ID_GENERATE,
.hdrsize = 0,
.name = NETLBL_NLTYPE_UNLABELED_NAME,
.version = NETLBL_PROTO_VERSION,
diff --git a/net/netlink/genetlink.c b/net/netlink/genetlink.c
index 01291b7a27bb..f19ec969edee 100644
--- a/net/netlink/genetlink.c
+++ b/net/netlink/genetlink.c
@@ -349,8 +349,6 @@ static int genl_validate_ops(const struct genl_family *family)
*
* Registers the specified family after validating it first. Only one
* family may be registered with the same family name or identifier.
- * The family id may equal GENL_ID_GENERATE causing an unique id to
- * be automatically generated and assigned.
*
* The family's ops array must already be assigned, you can use the
* genl_register_family_with_ops() helper function.
@@ -359,13 +357,7 @@ static int genl_validate_ops(const struct genl_family *family)
*/
int __genl_register_family(struct genl_family *family)
{
- int err = -EINVAL, i;
-
- if (family->id && family->id < GENL_MIN_ID)
- goto errout;
-
- if (family->id > GENL_MAX_ID)
- goto errout;
+ int err, i;
err = genl_validate_ops(family);
if (err)
@@ -378,8 +370,27 @@ int __genl_register_family(struct genl_family *family)
goto errout_locked;
}
- if (family->id == GENL_ID_GENERATE) {
- u16 newid = genl_generate_id();
+ if (family == &genl_ctrl) {
+ family->id = GENL_ID_CTRL;
+ } else {
+ u16 newid;
+
+ /* this should be left zero in the struct */
+ WARN_ON(family->id);
+
+ /*
+ * Sadly, a few cases need to be special-cased
+ * due to them having previously abused the API
+ * and having used their family ID also as their
+ * multicast group ID, so we use reserved IDs
+ * for both to be sure we can do that mapping.
+ */
+ if (strcmp(family->name, "pmcraid") == 0)
+ newid = GENL_ID_PMCRAID;
+ else if (strcmp(family->name, "VFS_DQUOT") == 0)
+ newid = GENL_ID_VFS_DQUOT;
+ else
+ newid = genl_generate_id();
if (!newid) {
err = -ENOMEM;
@@ -387,9 +398,6 @@ int __genl_register_family(struct genl_family *family)
}
family->id = newid;
- } else if (genl_family_find_byid(family->id)) {
- err = -EEXIST;
- goto errout_locked;
}
if (family->maxattr && !family->parallel_ops) {
@@ -419,7 +427,6 @@ int __genl_register_family(struct genl_family *family)
errout_locked:
genl_unlock_all();
-errout:
return err;
}
EXPORT_SYMBOL(__genl_register_family);
diff --git a/net/nfc/netlink.c b/net/nfc/netlink.c
index 79786bf62b88..c230403e066c 100644
--- a/net/nfc/netlink.c
+++ b/net/nfc/netlink.c
@@ -39,7 +39,6 @@ static const struct genl_multicast_group nfc_genl_mcgrps[] = {
};
static struct genl_family nfc_genl_family = {
- .id = GENL_ID_GENERATE,
.hdrsize = 0,
.name = NFC_GENL_NAME,
.version = NFC_GENL_VERSION,
diff --git a/net/openvswitch/datapath.c b/net/openvswitch/datapath.c
index 194435aa1165..f9fef7dfba15 100644
--- a/net/openvswitch/datapath.c
+++ b/net/openvswitch/datapath.c
@@ -671,7 +671,6 @@ static const struct genl_ops dp_packet_genl_ops[] = {
};
static struct genl_family dp_packet_genl_family = {
- .id = GENL_ID_GENERATE,
.hdrsize = sizeof(struct ovs_header),
.name = OVS_PACKET_FAMILY,
.version = OVS_PACKET_VERSION,
@@ -1436,7 +1435,6 @@ static const struct genl_ops dp_flow_genl_ops[] = {
};
static struct genl_family dp_flow_genl_family = {
- .id = GENL_ID_GENERATE,
.hdrsize = sizeof(struct ovs_header),
.name = OVS_FLOW_FAMILY,
.version = OVS_FLOW_VERSION,
@@ -1822,7 +1820,6 @@ static const struct genl_ops dp_datapath_genl_ops[] = {
};
static struct genl_family dp_datapath_genl_family = {
- .id = GENL_ID_GENERATE,
.hdrsize = sizeof(struct ovs_header),
.name = OVS_DATAPATH_FAMILY,
.version = OVS_DATAPATH_VERSION,
@@ -2244,7 +2241,6 @@ static const struct genl_ops dp_vport_genl_ops[] = {
};
struct genl_family dp_vport_genl_family = {
- .id = GENL_ID_GENERATE,
.hdrsize = sizeof(struct ovs_header),
.name = OVS_VPORT_FAMILY,
.version = OVS_VPORT_VERSION,
diff --git a/net/tipc/netlink.c b/net/tipc/netlink.c
index 4b94f3cfe3af..383b8fedabc7 100644
--- a/net/tipc/netlink.c
+++ b/net/tipc/netlink.c
@@ -136,7 +136,6 @@ const struct nla_policy tipc_nl_udp_policy[TIPC_NLA_UDP_MAX + 1] = {
* so we have a separate genl handling for the new API.
*/
struct genl_family tipc_genl_family = {
- .id = GENL_ID_GENERATE,
.name = TIPC_GENL_V2_NAME,
.version = TIPC_GENL_V2_VERSION,
.hdrsize = 0,
diff --git a/net/tipc/netlink_compat.c b/net/tipc/netlink_compat.c
index 1fd464764765..f04428e4c8e5 100644
--- a/net/tipc/netlink_compat.c
+++ b/net/tipc/netlink_compat.c
@@ -1216,7 +1216,6 @@ static int tipc_nl_compat_recv(struct sk_buff *skb, struct genl_info *info)
}
static struct genl_family tipc_genl_compat_family = {
- .id = GENL_ID_GENERATE,
.name = TIPC_GENL_NAME,
.version = TIPC_GENL_VERSION,
.hdrsize = TIPC_GENL_HDRLEN,
diff --git a/net/wimax/stack.c b/net/wimax/stack.c
index 3f816e2971ee..8ac83a41585f 100644
--- a/net/wimax/stack.c
+++ b/net/wimax/stack.c
@@ -573,7 +573,6 @@ size_t D_LEVEL_SIZE = ARRAY_SIZE(D_LEVEL);
struct genl_family wimax_gnl_family = {
- .id = GENL_ID_GENERATE,
.name = "WiMAX",
.version = WIMAX_GNL_VERSION,
.hdrsize = 0,
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index 7d8cb3330c86..714beafe05e0 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -39,7 +39,6 @@ static void nl80211_post_doit(const struct genl_ops *ops, struct sk_buff *skb,
/* the netlink family */
static struct genl_family nl80211_fam = {
- .id = GENL_ID_GENERATE, /* don't bother with a hardcoded ID */
.name = NL80211_GENL_NAME, /* have users key off the name instead */
.hdrsize = 0, /* no private header */
.version = 1, /* no particular meaning now */
--
2.8.1
^ permalink raw reply related [flat|nested] 22+ messages in thread
* [PATCH 3/5] genetlink: statically initialize families
2016-10-24 12:40 [PATCH 0/5] genetlink improvements Johannes Berg
2016-10-24 12:40 ` [PATCH 1/5] genetlink: introduce and use genl_family_attrbuf() Johannes Berg
2016-10-24 12:40 ` [PATCH 2/5] genetlink: no longer support using static family IDs Johannes Berg
@ 2016-10-24 12:40 ` Johannes Berg
2016-10-24 12:55 ` Johannes Berg
2016-10-24 12:40 ` [PATCH 4/5] genetlink: use idr to track families Johannes Berg
` (3 subsequent siblings)
6 siblings, 1 reply; 22+ messages in thread
From: Johannes Berg @ 2016-10-24 12:40 UTC (permalink / raw)
To: netdev; +Cc: Johannes Berg
From: Johannes Berg <johannes.berg@intel.com>
Instead of providing macros/inline functions to initialize
the families, make all users initialize them statically and
get rid of the macros.
This reduces the kernel code size by about 1.6k on x86-64
(with allyesconfig).
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
---
drivers/acpi/event.c | 1 +
drivers/net/gtp.c | 21 +++++++----
drivers/net/macsec.c | 21 +++++++----
drivers/net/team/team.c | 22 +++++++----
drivers/net/wireless/mac80211_hwsim.c | 26 +++++++------
drivers/scsi/pmcraid.c | 1 +
drivers/target/target_core_user.c | 1 +
drivers/thermal/thermal_core.c | 1 +
fs/dlm/netlink.c | 15 +++++---
fs/quota/netlink.c | 1 +
include/linux/drbd_genl.h | 2 +-
include/linux/genl_magic_func.h | 28 ++++++++------
include/net/genetlink.h | 71 ++++++-----------------------------
kernel/taskstats.c | 17 ++++++---
net/batman-adv/netlink.c | 25 +++++++-----
net/core/devlink.c | 27 +++++++------
net/core/drop_monitor.c | 20 ++++++----
net/hsr/hsr_netlink.c | 22 +++++++----
net/ieee802154/netlink.c | 23 +++++++-----
net/ieee802154/nl802154.c | 34 ++++++++---------
net/ipv4/fou.c | 22 ++++++-----
net/ipv4/tcp_metrics.c | 22 ++++++-----
net/ipv6/ila/ila_xlat.c | 24 +++++++-----
net/irda/irnetlink.c | 19 ++++++----
net/l2tp/l2tp_netlink.c | 25 +++++++-----
net/netfilter/ipvs/ip_vs_ctl.c | 22 ++++++-----
net/netlabel/netlabel_calipso.c | 20 ++++++----
net/netlabel/netlabel_cipso_v4.c | 21 ++++++-----
net/netlabel/netlabel_mgmt.c | 20 ++++++----
net/netlabel/netlabel_unlabeled.c | 20 ++++++----
net/netlink/genetlink.c | 35 +++++++++--------
net/nfc/netlink.c | 24 +++++++-----
net/openvswitch/datapath.c | 4 ++
net/tipc/netlink.c | 22 ++++++-----
net/tipc/netlink_compat.c | 20 +++++-----
net/wimax/stack.c | 19 +++++-----
net/wireless/nl80211.c | 33 ++++++++--------
37 files changed, 414 insertions(+), 337 deletions(-)
diff --git a/drivers/acpi/event.c b/drivers/acpi/event.c
index 8dfca3d53131..1ab12ad7d5ba 100644
--- a/drivers/acpi/event.c
+++ b/drivers/acpi/event.c
@@ -83,6 +83,7 @@ static const struct genl_multicast_group acpi_event_mcgrps[] = {
};
static struct genl_family acpi_event_genl_family = {
+ .module = THIS_MODULE,
.name = ACPI_GENL_FAMILY_NAME,
.version = ACPI_GENL_VERSION,
.maxattr = ACPI_GENL_ATTR_MAX,
diff --git a/drivers/net/gtp.c b/drivers/net/gtp.c
index f66737ba1299..0604fd78f826 100644
--- a/drivers/net/gtp.c
+++ b/drivers/net/gtp.c
@@ -1094,13 +1094,7 @@ static int gtp_genl_del_pdp(struct sk_buff *skb, struct genl_info *info)
return 0;
}
-static struct genl_family gtp_genl_family = {
- .name = "gtp",
- .version = 0,
- .hdrsize = 0,
- .maxattr = GTPA_MAX,
- .netnsok = true,
-};
+static struct genl_family gtp_genl_family;
static int gtp_genl_fill_info(struct sk_buff *skb, u32 snd_portid, u32 snd_seq,
u32 type, struct pdp_ctx *pctx)
@@ -1296,6 +1290,17 @@ static const struct genl_ops gtp_genl_ops[] = {
},
};
+static struct genl_family gtp_genl_family = {
+ .name = "gtp",
+ .version = 0,
+ .hdrsize = 0,
+ .maxattr = GTPA_MAX,
+ .netnsok = true,
+ .module = THIS_MODULE,
+ .ops = gtp_genl_ops,
+ .n_ops = ARRAY_SIZE(gtp_genl_ops),
+};
+
static int __net_init gtp_net_init(struct net *net)
{
struct gtp_net *gn = net_generic(net, gtp_net_id);
@@ -1335,7 +1340,7 @@ static int __init gtp_init(void)
if (err < 0)
goto error_out;
- err = genl_register_family_with_ops(>p_genl_family, gtp_genl_ops);
+ err = genl_register_family(>p_genl_family);
if (err < 0)
goto unreg_rtnl_link;
diff --git a/drivers/net/macsec.c b/drivers/net/macsec.c
index a5309b81a786..63ca7a3c77cf 100644
--- a/drivers/net/macsec.c
+++ b/drivers/net/macsec.c
@@ -1421,13 +1421,7 @@ static void clear_tx_sa(struct macsec_tx_sa *tx_sa)
macsec_txsa_put(tx_sa);
}
-static struct genl_family macsec_fam = {
- .name = MACSEC_GENL_NAME,
- .hdrsize = 0,
- .version = MACSEC_GENL_VERSION,
- .maxattr = MACSEC_ATTR_MAX,
- .netnsok = true,
-};
+static struct genl_family macsec_fam;
static struct net_device *get_dev_from_nl(struct net *net,
struct nlattr **attrs)
@@ -2654,6 +2648,17 @@ static const struct genl_ops macsec_genl_ops[] = {
},
};
+static struct genl_family macsec_fam = {
+ .name = MACSEC_GENL_NAME,
+ .hdrsize = 0,
+ .version = MACSEC_GENL_VERSION,
+ .maxattr = MACSEC_ATTR_MAX,
+ .netnsok = true,
+ .module = THIS_MODULE,
+ .ops = macsec_genl_ops,
+ .n_ops = ARRAY_SIZE(macsec_genl_ops),
+};
+
static netdev_tx_t macsec_start_xmit(struct sk_buff *skb,
struct net_device *dev)
{
@@ -3461,7 +3466,7 @@ static int __init macsec_init(void)
if (err)
goto notifier;
- err = genl_register_family_with_ops(&macsec_fam, macsec_genl_ops);
+ err = genl_register_family(&macsec_fam);
if (err)
goto rtnl;
diff --git a/drivers/net/team/team.c b/drivers/net/team/team.c
index 0b50205764ff..46bf7c1216c0 100644
--- a/drivers/net/team/team.c
+++ b/drivers/net/team/team.c
@@ -2150,12 +2150,7 @@ static struct rtnl_link_ops team_link_ops __read_mostly = {
* Generic netlink custom interface
***********************************/
-static struct genl_family team_nl_family = {
- .name = TEAM_GENL_NAME,
- .version = TEAM_GENL_VERSION,
- .maxattr = TEAM_ATTR_MAX,
- .netnsok = true,
-};
+static struct genl_family team_nl_family;
static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = {
[TEAM_ATTR_UNSPEC] = { .type = NLA_UNSPEC, },
@@ -2745,6 +2740,18 @@ static const struct genl_multicast_group team_nl_mcgrps[] = {
{ .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME, },
};
+static struct genl_family team_nl_family = {
+ .name = TEAM_GENL_NAME,
+ .version = TEAM_GENL_VERSION,
+ .maxattr = TEAM_ATTR_MAX,
+ .netnsok = true,
+ .module = THIS_MODULE,
+ .ops = team_nl_ops,
+ .n_ops = ARRAY_SIZE(team_nl_ops),
+ .mcgrps = team_nl_mcgrps,
+ .n_mcgrps = ARRAY_SIZE(team_nl_mcgrps),
+};
+
static int team_nl_send_multicast(struct sk_buff *skb,
struct team *team, u32 portid)
{
@@ -2768,8 +2775,7 @@ static int team_nl_send_event_port_get(struct team *team,
static int team_nl_init(void)
{
- return genl_register_family_with_ops_groups(&team_nl_family, team_nl_ops,
- team_nl_mcgrps);
+ return genl_register_family(&team_nl_family);
}
static void team_nl_fini(void)
diff --git a/drivers/net/wireless/mac80211_hwsim.c b/drivers/net/wireless/mac80211_hwsim.c
index 54b6cd62676e..5d4637e586e8 100644
--- a/drivers/net/wireless/mac80211_hwsim.c
+++ b/drivers/net/wireless/mac80211_hwsim.c
@@ -587,14 +587,8 @@ struct hwsim_radiotap_ack_hdr {
__le16 rt_chbitmask;
} __packed;
-/* MAC80211_HWSIM netlinf family */
-static struct genl_family hwsim_genl_family = {
- .hdrsize = 0,
- .name = "MAC80211_HWSIM",
- .version = 1,
- .maxattr = HWSIM_ATTR_MAX,
- .netnsok = true,
-};
+/* MAC80211_HWSIM netlink family */
+static struct genl_family hwsim_genl_family;
enum hwsim_multicast_groups {
HWSIM_MCGRP_CONFIG,
@@ -3234,6 +3228,18 @@ static const struct genl_ops hwsim_ops[] = {
},
};
+static struct genl_family hwsim_genl_family = {
+ .name = "MAC80211_HWSIM",
+ .version = 1,
+ .maxattr = HWSIM_ATTR_MAX,
+ .netnsok = true,
+ .module = THIS_MODULE,
+ .ops = hwsim_ops,
+ .n_ops = ARRAY_SIZE(hwsim_ops),
+ .mcgrps = hwsim_mcgrps,
+ .n_mcgrps = ARRAY_SIZE(hwsim_mcgrps),
+};
+
static void destroy_radio(struct work_struct *work)
{
struct mac80211_hwsim_data *data =
@@ -3287,9 +3293,7 @@ static int hwsim_init_netlink(void)
printk(KERN_INFO "mac80211_hwsim: initializing netlink\n");
- rc = genl_register_family_with_ops_groups(&hwsim_genl_family,
- hwsim_ops,
- hwsim_mcgrps);
+ rc = genl_register_family(&hwsim_genl_family);
if (rc)
goto failure;
diff --git a/drivers/scsi/pmcraid.c b/drivers/scsi/pmcraid.c
index cc50eb87b28a..c0ab7bb8c3ce 100644
--- a/drivers/scsi/pmcraid.c
+++ b/drivers/scsi/pmcraid.c
@@ -1369,6 +1369,7 @@ static struct genl_multicast_group pmcraid_mcgrps[] = {
};
static struct genl_family pmcraid_event_family = {
+ .module = THIS_MODULE,
.name = "pmcraid",
.version = 1,
.maxattr = PMCRAID_AEN_ATTR_MAX,
diff --git a/drivers/target/target_core_user.c b/drivers/target/target_core_user.c
index 313a0ef3cda7..3483372f5562 100644
--- a/drivers/target/target_core_user.c
+++ b/drivers/target/target_core_user.c
@@ -148,6 +148,7 @@ static const struct genl_multicast_group tcmu_mcgrps[] = {
/* Our generic netlink family */
static struct genl_family tcmu_genl_family = {
+ .module = THIS_MODULE,
.hdrsize = 0,
.name = "TCM-USER",
.version = 1,
diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c
index 68d7503f6417..93b6caab2d9f 100644
--- a/drivers/thermal/thermal_core.c
+++ b/drivers/thermal/thermal_core.c
@@ -2164,6 +2164,7 @@ static const struct genl_multicast_group thermal_event_mcgrps[] = {
};
static struct genl_family thermal_event_genl_family = {
+ .module = THIS_MODULE,
.name = THERMAL_GENL_FAMILY_NAME,
.version = THERMAL_GENL_VERSION,
.maxattr = THERMAL_GENL_ATTR_MAX,
diff --git a/fs/dlm/netlink.c b/fs/dlm/netlink.c
index 00d226956264..04042d69573c 100644
--- a/fs/dlm/netlink.c
+++ b/fs/dlm/netlink.c
@@ -16,10 +16,7 @@
static uint32_t dlm_nl_seqnum;
static uint32_t listener_nlportid;
-static struct genl_family family = {
- .name = DLM_GENL_NAME,
- .version = DLM_GENL_VERSION,
-};
+static struct genl_family family;
static int prepare_data(u8 cmd, struct sk_buff **skbp, size_t size)
{
@@ -75,9 +72,17 @@ static struct genl_ops dlm_nl_ops[] = {
},
};
+static struct genl_family family = {
+ .name = DLM_GENL_NAME,
+ .version = DLM_GENL_VERSION,
+ .ops = dlm_nl_ops,
+ .n_ops = ARRAY_SIZE(dlm_nl_ops),
+ .module = THIS_MODULE,
+};
+
int __init dlm_netlink_init(void)
{
- return genl_register_family_with_ops(&family, dlm_nl_ops);
+ return genl_register_family(&family);
}
void dlm_netlink_exit(void)
diff --git a/fs/quota/netlink.c b/fs/quota/netlink.c
index 3965a5cdfaa2..9457c7b0dfa2 100644
--- a/fs/quota/netlink.c
+++ b/fs/quota/netlink.c
@@ -13,6 +13,7 @@ static const struct genl_multicast_group quota_mcgrps[] = {
/* Netlink family structure for quota */
static struct genl_family quota_genl_family = {
+ .module = THIS_MODULE,
.hdrsize = 0,
.name = "VFS_DQUOT",
.version = 1,
diff --git a/include/linux/drbd_genl.h b/include/linux/drbd_genl.h
index c934d3a96b5e..2896f93808ae 100644
--- a/include/linux/drbd_genl.h
+++ b/include/linux/drbd_genl.h
@@ -67,7 +67,7 @@
* genl_magic_func.h
* generates an entry in the static genl_ops array,
* and static register/unregister functions to
- * genl_register_family_with_ops().
+ * genl_register_family().
*
* flags and handler:
* GENL_op_init( .doit = x, .dumpit = y, .flags = something)
diff --git a/include/linux/genl_magic_func.h b/include/linux/genl_magic_func.h
index 7c070c1fe457..40c2e39362c8 100644
--- a/include/linux/genl_magic_func.h
+++ b/include/linux/genl_magic_func.h
@@ -259,15 +259,7 @@ static struct genl_ops ZZZ_genl_ops[] __read_mostly = {
* {{{2
*/
#define ZZZ_genl_family CONCAT_(GENL_MAGIC_FAMILY, _genl_family)
-static struct genl_family ZZZ_genl_family __read_mostly = {
- .name = __stringify(GENL_MAGIC_FAMILY),
- .version = GENL_MAGIC_VERSION,
-#ifdef GENL_MAGIC_FAMILY_HDRSZ
- .hdrsize = NLA_ALIGN(GENL_MAGIC_FAMILY_HDRSZ),
-#endif
- .maxattr = ARRAY_SIZE(drbd_tla_nl_policy)-1,
-};
-
+static struct genl_family ZZZ_genl_family;
/*
* Magic: define multicast groups
* Magic: define multicast group registration helper
@@ -301,11 +293,23 @@ static int CONCAT_(GENL_MAGIC_FAMILY, _genl_multicast_ ## group)( \
#undef GENL_mc_group
#define GENL_mc_group(group)
+static struct genl_family ZZZ_genl_family __read_mostly = {
+ .name = __stringify(GENL_MAGIC_FAMILY),
+ .version = GENL_MAGIC_VERSION,
+#ifdef GENL_MAGIC_FAMILY_HDRSZ
+ .hdrsize = NLA_ALIGN(GENL_MAGIC_FAMILY_HDRSZ),
+#endif
+ .maxattr = ARRAY_SIZE(drbd_tla_nl_policy)-1,
+ .ops = ZZZ_genl_ops,
+ .n_ops = ARRAY_SIZE(ZZZ_genl_ops),
+ .mcgrps = ZZZ_genl_mcgrps,
+ .n_mcgrps = ARRAY_SIZE(ZZZ_genl_mcgrps),
+ .module = THIS_MODULE,
+};
+
int CONCAT_(GENL_MAGIC_FAMILY, _genl_register)(void)
{
- return genl_register_family_with_ops_groups(&ZZZ_genl_family, \
- ZZZ_genl_ops, \
- ZZZ_genl_mcgrps);
+ return genl_register_family(&ZZZ_genl_family);
}
void CONCAT_(GENL_MAGIC_FAMILY, _genl_unregister)(void)
diff --git a/include/net/genetlink.h b/include/net/genetlink.h
index 43a5c3975a2f..2298b50cee34 100644
--- a/include/net/genetlink.h
+++ b/include/net/genetlink.h
@@ -39,13 +39,14 @@ struct genl_info;
* Note that unbind() will not be called symmetrically if the
* generic netlink family is removed while there are still open
* sockets.
- * @attrbuf: buffer to store parsed attributes
- * @family_list: family list
- * @mcgrps: multicast groups used by this family (private)
- * @n_mcgrps: number of multicast groups (private)
+ * @attrbuf: buffer to store parsed attributes (private)
+ * @family_list: family list (private)
+ * @mcgrps: multicast groups used by this family
+ * @n_mcgrps: number of multicast groups
* @mcgrp_offset: starting number of multicast group IDs in this family
- * @ops: the operations supported by this family (private)
- * @n_ops: number of operations supported by this family (private)
+ * (private)
+ * @ops: the operations supported by this family
+ * @n_ops: number of operations supported by this family
*/
struct genl_family {
unsigned int id; /* private */
@@ -64,10 +65,10 @@ struct genl_family {
int (*mcast_bind)(struct net *net, int group);
void (*mcast_unbind)(struct net *net, int group);
struct nlattr ** attrbuf; /* private */
- const struct genl_ops * ops; /* private */
- const struct genl_multicast_group *mcgrps; /* private */
- unsigned int n_ops; /* private */
- unsigned int n_mcgrps; /* private */
+ const struct genl_ops * ops;
+ const struct genl_multicast_group *mcgrps;
+ unsigned int n_ops;
+ unsigned int n_mcgrps;
unsigned int mcgrp_offset; /* private */
struct list_head family_list; /* private */
struct module *module;
@@ -132,55 +133,7 @@ struct genl_ops {
u8 flags;
};
-int __genl_register_family(struct genl_family *family);
-
-static inline int genl_register_family(struct genl_family *family)
-{
- family->module = THIS_MODULE;
- return __genl_register_family(family);
-}
-
-/**
- * genl_register_family_with_ops - register a generic netlink family with ops
- * @family: generic netlink family
- * @ops: operations to be registered
- * @n_ops: number of elements to register
- *
- * Registers the specified family and operations from the specified table.
- * Only one family may be registered with the same family name or identifier.
- *
- * Either a doit or dumpit callback must be specified for every registered
- * operation or the function will fail. Only one operation structure per
- * command identifier may be registered.
- *
- * See include/net/genetlink.h for more documenation on the operations
- * structure.
- *
- * Return 0 on success or a negative error code.
- */
-static inline int
-_genl_register_family_with_ops_grps(struct genl_family *family,
- const struct genl_ops *ops, size_t n_ops,
- const struct genl_multicast_group *mcgrps,
- size_t n_mcgrps)
-{
- family->module = THIS_MODULE;
- family->ops = ops;
- family->n_ops = n_ops;
- family->mcgrps = mcgrps;
- family->n_mcgrps = n_mcgrps;
- return __genl_register_family(family);
-}
-
-#define genl_register_family_with_ops(family, ops) \
- _genl_register_family_with_ops_grps((family), \
- (ops), ARRAY_SIZE(ops), \
- NULL, 0)
-#define genl_register_family_with_ops_groups(family, ops, grps) \
- _genl_register_family_with_ops_grps((family), \
- (ops), ARRAY_SIZE(ops), \
- (grps), ARRAY_SIZE(grps))
-
+int genl_register_family(struct genl_family *family);
int genl_unregister_family(struct genl_family *family);
void genl_notify(struct genl_family *family, struct sk_buff *skb,
struct genl_info *info, u32 group, gfp_t flags);
diff --git a/kernel/taskstats.c b/kernel/taskstats.c
index d7a1a9461a10..4075ece592f2 100644
--- a/kernel/taskstats.c
+++ b/kernel/taskstats.c
@@ -41,11 +41,7 @@ static DEFINE_PER_CPU(__u32, taskstats_seqnum);
static int family_registered;
struct kmem_cache *taskstats_cache;
-static struct genl_family family = {
- .name = TASKSTATS_GENL_NAME,
- .version = TASKSTATS_GENL_VERSION,
- .maxattr = TASKSTATS_CMD_ATTR_MAX,
-};
+static struct genl_family family;
static const struct nla_policy taskstats_cmd_get_policy[TASKSTATS_CMD_ATTR_MAX+1] = {
[TASKSTATS_CMD_ATTR_PID] = { .type = NLA_U32 },
@@ -650,6 +646,15 @@ static const struct genl_ops taskstats_ops[] = {
},
};
+static struct genl_family family = {
+ .name = TASKSTATS_GENL_NAME,
+ .version = TASKSTATS_GENL_VERSION,
+ .maxattr = TASKSTATS_CMD_ATTR_MAX,
+ .module = THIS_MODULE,
+ .ops = taskstats_ops,
+ .n_ops = ARRAY_SIZE(taskstats_ops),
+};
+
/* Needed early in initialization */
void __init taskstats_init_early(void)
{
@@ -666,7 +671,7 @@ static int __init taskstats_init(void)
{
int rc;
- rc = genl_register_family_with_ops(&family, taskstats_ops);
+ rc = genl_register_family(&family);
if (rc)
return rc;
diff --git a/net/batman-adv/netlink.c b/net/batman-adv/netlink.c
index a03b0ed7e8dd..e28cec34a016 100644
--- a/net/batman-adv/netlink.c
+++ b/net/batman-adv/netlink.c
@@ -48,13 +48,7 @@
#include "tp_meter.h"
#include "translation-table.h"
-struct genl_family batadv_netlink_family = {
- .hdrsize = 0,
- .name = BATADV_NL_NAME,
- .version = 1,
- .maxattr = BATADV_ATTR_MAX,
- .netnsok = true,
-};
+struct genl_family batadv_netlink_family;
/* multicast groups */
enum batadv_netlink_multicast_groups {
@@ -609,6 +603,19 @@ static struct genl_ops batadv_netlink_ops[] = {
};
+struct genl_family batadv_netlink_family = {
+ .hdrsize = 0,
+ .name = BATADV_NL_NAME,
+ .version = 1,
+ .maxattr = BATADV_ATTR_MAX,
+ .netnsok = true,
+ .module = THIS_MODULE,
+ .ops = batadv_netlink_ops,
+ .n_ops = ARRAY_SIZE(batadv_netlink_ops),
+ .mcgrps = batadv_netlink_mcgrps,
+ .n_mcgrps = ARRAY_SIZE(batadv_netlink_mcgrps),
+};
+
/**
* batadv_netlink_register - register batadv genl netlink family
*/
@@ -616,9 +623,7 @@ void __init batadv_netlink_register(void)
{
int ret;
- ret = genl_register_family_with_ops_groups(&batadv_netlink_family,
- batadv_netlink_ops,
- batadv_netlink_mcgrps);
+ ret = genl_register_family(&batadv_netlink_family);
if (ret)
pr_warn("unable to register netlink family");
}
diff --git a/net/core/devlink.c b/net/core/devlink.c
index 701d61eab9a7..6f01d41b1851 100644
--- a/net/core/devlink.c
+++ b/net/core/devlink.c
@@ -341,14 +341,7 @@ static void devlink_nl_post_doit(const struct genl_ops *ops,
mutex_unlock(&devlink_mutex);
}
-static struct genl_family devlink_nl_family = {
- .name = DEVLINK_GENL_NAME,
- .version = DEVLINK_GENL_VERSION,
- .maxattr = DEVLINK_ATTR_MAX,
- .netnsok = true,
- .pre_doit = devlink_nl_pre_doit,
- .post_doit = devlink_nl_post_doit,
-};
+static struct genl_family devlink_nl_family;
enum devlink_multicast_groups {
DEVLINK_MCGRP_CONFIG,
@@ -1617,6 +1610,20 @@ static const struct genl_ops devlink_nl_ops[] = {
},
};
+static struct genl_family devlink_nl_family = {
+ .name = DEVLINK_GENL_NAME,
+ .version = DEVLINK_GENL_VERSION,
+ .maxattr = DEVLINK_ATTR_MAX,
+ .netnsok = true,
+ .pre_doit = devlink_nl_pre_doit,
+ .post_doit = devlink_nl_post_doit,
+ .module = THIS_MODULE,
+ .ops = devlink_nl_ops,
+ .n_ops = ARRAY_SIZE(devlink_nl_ops),
+ .mcgrps = devlink_nl_mcgrps,
+ .n_mcgrps = ARRAY_SIZE(devlink_nl_mcgrps),
+};
+
/**
* devlink_alloc - Allocate new devlink instance resources
*
@@ -1839,9 +1846,7 @@ EXPORT_SYMBOL_GPL(devlink_sb_unregister);
static int __init devlink_module_init(void)
{
- return genl_register_family_with_ops_groups(&devlink_nl_family,
- devlink_nl_ops,
- devlink_nl_mcgrps);
+ return genl_register_family(&devlink_nl_family);
}
static void __exit devlink_module_exit(void)
diff --git a/net/core/drop_monitor.c b/net/core/drop_monitor.c
index a5320dfcd978..80c002794ff6 100644
--- a/net/core/drop_monitor.c
+++ b/net/core/drop_monitor.c
@@ -59,11 +59,7 @@ struct dm_hw_stat_delta {
unsigned long last_drop_val;
};
-static struct genl_family net_drop_monitor_family = {
- .hdrsize = 0,
- .name = "NET_DM",
- .version = 2,
-};
+static struct genl_family net_drop_monitor_family;
static DEFINE_PER_CPU(struct per_cpu_dm_data, dm_cpu_data);
@@ -350,6 +346,17 @@ static const struct genl_ops dropmon_ops[] = {
},
};
+static struct genl_family net_drop_monitor_family = {
+ .hdrsize = 0,
+ .name = "NET_DM",
+ .version = 2,
+ .module = THIS_MODULE,
+ .ops = dropmon_ops,
+ .n_ops = ARRAY_SIZE(dropmon_ops),
+ .mcgrps = dropmon_mcgrps,
+ .n_mcgrps = ARRAY_SIZE(dropmon_mcgrps),
+};
+
static struct notifier_block dropmon_net_notifier = {
.notifier_call = dropmon_net_event
};
@@ -366,8 +373,7 @@ static int __init init_net_drop_monitor(void)
return -ENOSPC;
}
- rc = genl_register_family_with_ops_groups(&net_drop_monitor_family,
- dropmon_ops, dropmon_mcgrps);
+ rc = genl_register_family(&net_drop_monitor_family);
if (rc) {
pr_err("Could not create drop monitor netlink family\n");
return rc;
diff --git a/net/hsr/hsr_netlink.c b/net/hsr/hsr_netlink.c
index 2ad039492bee..aab34c7f6f89 100644
--- a/net/hsr/hsr_netlink.c
+++ b/net/hsr/hsr_netlink.c
@@ -131,12 +131,7 @@ static const struct nla_policy hsr_genl_policy[HSR_A_MAX + 1] = {
[HSR_A_IF2_SEQ] = { .type = NLA_U16 },
};
-static struct genl_family hsr_genl_family = {
- .hdrsize = 0,
- .name = "HSR",
- .version = 1,
- .maxattr = HSR_A_MAX,
-};
+static struct genl_family hsr_genl_family;
static const struct genl_multicast_group hsr_mcgrps[] = {
{ .name = "hsr-network", },
@@ -466,6 +461,18 @@ static const struct genl_ops hsr_ops[] = {
},
};
+static struct genl_family hsr_genl_family = {
+ .hdrsize = 0,
+ .name = "HSR",
+ .version = 1,
+ .maxattr = HSR_A_MAX,
+ .module = THIS_MODULE,
+ .ops = hsr_ops,
+ .n_ops = ARRAY_SIZE(hsr_ops),
+ .mcgrps = hsr_mcgrps,
+ .n_mcgrps = ARRAY_SIZE(hsr_mcgrps),
+};
+
int __init hsr_netlink_init(void)
{
int rc;
@@ -474,8 +481,7 @@ int __init hsr_netlink_init(void)
if (rc)
goto fail_rtnl_link_register;
- rc = genl_register_family_with_ops_groups(&hsr_genl_family, hsr_ops,
- hsr_mcgrps);
+ rc = genl_register_family(&hsr_genl_family);
if (rc)
goto fail_genl_register_family;
diff --git a/net/ieee802154/netlink.c b/net/ieee802154/netlink.c
index 19144158b696..08e62470bac2 100644
--- a/net/ieee802154/netlink.c
+++ b/net/ieee802154/netlink.c
@@ -28,13 +28,6 @@
static unsigned int ieee802154_seq_num;
static DEFINE_SPINLOCK(ieee802154_seq_lock);
-struct genl_family nl802154_family = {
- .hdrsize = 0,
- .name = IEEE802154_NL_NAME,
- .version = 1,
- .maxattr = IEEE802154_ATTR_MAX,
-};
-
/* Requests to userspace */
struct sk_buff *ieee802154_nl_create(int flags, u8 req)
{
@@ -138,11 +131,21 @@ static const struct genl_multicast_group ieee802154_mcgrps[] = {
[IEEE802154_BEACON_MCGRP] = { .name = IEEE802154_MCAST_BEACON_NAME, },
};
+struct genl_family nl802154_family = {
+ .hdrsize = 0,
+ .name = IEEE802154_NL_NAME,
+ .version = 1,
+ .maxattr = IEEE802154_ATTR_MAX,
+ .module = THIS_MODULE,
+ .ops = ieee8021154_ops,
+ .n_ops = ARRAY_SIZE(ieee8021154_ops),
+ .mcgrps = ieee802154_mcgrps,
+ .n_mcgrps = ARRAY_SIZE(ieee802154_mcgrps),
+};
+
int __init ieee802154_nl_init(void)
{
- return genl_register_family_with_ops_groups(&nl802154_family,
- ieee8021154_ops,
- ieee802154_mcgrps);
+ return genl_register_family(&nl802154_family);
}
void ieee802154_nl_exit(void)
diff --git a/net/ieee802154/nl802154.c b/net/ieee802154/nl802154.c
index 182299858f1d..f7e75578aedd 100644
--- a/net/ieee802154/nl802154.c
+++ b/net/ieee802154/nl802154.c
@@ -26,22 +26,8 @@
#include "rdev-ops.h"
#include "core.h"
-static int nl802154_pre_doit(const struct genl_ops *ops, struct sk_buff *skb,
- struct genl_info *info);
-
-static void nl802154_post_doit(const struct genl_ops *ops, struct sk_buff *skb,
- struct genl_info *info);
-
/* the netlink family */
-static struct genl_family nl802154_fam = {
- .name = NL802154_GENL_NAME, /* have users key off the name instead */
- .hdrsize = 0, /* no private header */
- .version = 1, /* no particular meaning now */
- .maxattr = NL802154_ATTR_MAX,
- .netnsok = true,
- .pre_doit = nl802154_pre_doit,
- .post_doit = nl802154_post_doit,
-};
+static struct genl_family nl802154_fam;
/* multicast groups */
enum nl802154_multicast_groups {
@@ -2476,11 +2462,25 @@ static const struct genl_ops nl802154_ops[] = {
#endif /* CONFIG_IEEE802154_NL802154_EXPERIMENTAL */
};
+static struct genl_family nl802154_fam = {
+ .name = NL802154_GENL_NAME, /* have users key off the name instead */
+ .hdrsize = 0, /* no private header */
+ .version = 1, /* no particular meaning now */
+ .maxattr = NL802154_ATTR_MAX,
+ .netnsok = true,
+ .pre_doit = nl802154_pre_doit,
+ .post_doit = nl802154_post_doit,
+ .module = THIS_MODULE,
+ .ops = nl802154_ops,
+ .n_ops = ARRAY_SIZE(nl802154_ops),
+ .mcgrps = nl802154_mcgrps,
+ .n_mcgrps = ARRAY_SIZE(nl802154_mcgrps),
+};
+
/* initialisation/exit functions */
int nl802154_init(void)
{
- return genl_register_family_with_ops_groups(&nl802154_fam, nl802154_ops,
- nl802154_mcgrps);
+ return genl_register_family(&nl802154_fam);
}
void nl802154_exit(void)
diff --git a/net/ipv4/fou.c b/net/ipv4/fou.c
index e3fc527c5d37..5b5226a2434f 100644
--- a/net/ipv4/fou.c
+++ b/net/ipv4/fou.c
@@ -622,13 +622,7 @@ static int fou_destroy(struct net *net, struct fou_cfg *cfg)
return err;
}
-static struct genl_family fou_nl_family = {
- .hdrsize = 0,
- .name = FOU_GENL_NAME,
- .version = FOU_GENL_VERSION,
- .maxattr = FOU_ATTR_MAX,
- .netnsok = true,
-};
+static struct genl_family fou_nl_family;
static const struct nla_policy fou_nl_policy[FOU_ATTR_MAX + 1] = {
[FOU_ATTR_PORT] = { .type = NLA_U16, },
@@ -830,6 +824,17 @@ static const struct genl_ops fou_nl_ops[] = {
},
};
+static struct genl_family fou_nl_family = {
+ .hdrsize = 0,
+ .name = FOU_GENL_NAME,
+ .version = FOU_GENL_VERSION,
+ .maxattr = FOU_ATTR_MAX,
+ .netnsok = true,
+ .module = THIS_MODULE,
+ .ops = fou_nl_ops,
+ .n_ops = ARRAY_SIZE(fou_nl_ops),
+};
+
size_t fou_encap_hlen(struct ip_tunnel_encap *e)
{
return sizeof(struct udphdr);
@@ -1085,8 +1090,7 @@ static int __init fou_init(void)
if (ret)
goto exit;
- ret = genl_register_family_with_ops(&fou_nl_family,
- fou_nl_ops);
+ ret = genl_register_family(&fou_nl_family);
if (ret < 0)
goto unregister;
diff --git a/net/ipv4/tcp_metrics.c b/net/ipv4/tcp_metrics.c
index 3da305127b32..bba3c72c4a39 100644
--- a/net/ipv4/tcp_metrics.c
+++ b/net/ipv4/tcp_metrics.c
@@ -742,13 +742,7 @@ void tcp_fastopen_cache_set(struct sock *sk, u16 mss,
rcu_read_unlock();
}
-static struct genl_family tcp_metrics_nl_family = {
- .hdrsize = 0,
- .name = TCP_METRICS_GENL_NAME,
- .version = TCP_METRICS_GENL_VERSION,
- .maxattr = TCP_METRICS_ATTR_MAX,
- .netnsok = true,
-};
+static struct genl_family tcp_metrics_nl_family;
static const struct nla_policy tcp_metrics_nl_policy[TCP_METRICS_ATTR_MAX + 1] = {
[TCP_METRICS_ATTR_ADDR_IPV4] = { .type = NLA_U32, },
@@ -1115,6 +1109,17 @@ static const struct genl_ops tcp_metrics_nl_ops[] = {
},
};
+static struct genl_family tcp_metrics_nl_family = {
+ .hdrsize = 0,
+ .name = TCP_METRICS_GENL_NAME,
+ .version = TCP_METRICS_GENL_VERSION,
+ .maxattr = TCP_METRICS_ATTR_MAX,
+ .netnsok = true,
+ .module = THIS_MODULE,
+ .ops = tcp_metrics_nl_ops,
+ .n_ops = ARRAY_SIZE(tcp_metrics_nl_ops),
+};
+
static unsigned int tcpmhash_entries;
static int __init set_tcpmhash_entries(char *str)
{
@@ -1178,8 +1183,7 @@ void __init tcp_metrics_init(void)
if (ret < 0)
panic("Could not allocate the tcp_metrics hash table\n");
- ret = genl_register_family_with_ops(&tcp_metrics_nl_family,
- tcp_metrics_nl_ops);
+ ret = genl_register_family(&tcp_metrics_nl_family);
if (ret < 0)
panic("Could not register tcp_metrics generic netlink\n");
}
diff --git a/net/ipv6/ila/ila_xlat.c b/net/ipv6/ila/ila_xlat.c
index 0d57e27d1cdd..97f7b0cc4675 100644
--- a/net/ipv6/ila/ila_xlat.c
+++ b/net/ipv6/ila/ila_xlat.c
@@ -118,14 +118,7 @@ static const struct rhashtable_params rht_params = {
.obj_cmpfn = ila_cmpfn,
};
-static struct genl_family ila_nl_family = {
- .hdrsize = 0,
- .name = ILA_GENL_NAME,
- .version = ILA_GENL_VERSION,
- .maxattr = ILA_ATTR_MAX,
- .netnsok = true,
- .parallel_ops = true,
-};
+static struct genl_family ila_nl_family;
static const struct nla_policy ila_nl_policy[ILA_ATTR_MAX + 1] = {
[ILA_ATTR_LOCATOR] = { .type = NLA_U64, },
@@ -560,6 +553,18 @@ static const struct genl_ops ila_nl_ops[] = {
},
};
+static struct genl_family ila_nl_family = {
+ .hdrsize = 0,
+ .name = ILA_GENL_NAME,
+ .version = ILA_GENL_VERSION,
+ .maxattr = ILA_ATTR_MAX,
+ .netnsok = true,
+ .parallel_ops = true,
+ .module = THIS_MODULE,
+ .ops = ila_nl_ops,
+ .n_ops = ARRAY_SIZE(ila_nl_ops),
+};
+
#define ILA_HASH_TABLE_SIZE 1024
static __net_init int ila_init_net(struct net *net)
@@ -630,8 +635,7 @@ int ila_xlat_init(void)
if (ret)
goto exit;
- ret = genl_register_family_with_ops(&ila_nl_family,
- ila_nl_ops);
+ ret = genl_register_family(&ila_nl_family);
if (ret < 0)
goto unregister;
diff --git a/net/irda/irnetlink.c b/net/irda/irnetlink.c
index f23b81aa91fe..07877347c2f7 100644
--- a/net/irda/irnetlink.c
+++ b/net/irda/irnetlink.c
@@ -24,12 +24,7 @@
-static struct genl_family irda_nl_family = {
- .name = IRDA_NL_NAME,
- .hdrsize = 0,
- .version = IRDA_NL_VERSION,
- .maxattr = IRDA_NL_CMD_MAX,
-};
+static struct genl_family irda_nl_family;
static struct net_device * ifname_to_netdev(struct net *net, struct genl_info *info)
{
@@ -146,9 +141,19 @@ static const struct genl_ops irda_nl_ops[] = {
};
+static struct genl_family irda_nl_family = {
+ .name = IRDA_NL_NAME,
+ .hdrsize = 0,
+ .version = IRDA_NL_VERSION,
+ .maxattr = IRDA_NL_CMD_MAX,
+ .module = THIS_MODULE,
+ .ops = irda_nl_ops,
+ .n_ops = ARRAY_SIZE(irda_nl_ops),
+};
+
int irda_nl_register(void)
{
- return genl_register_family_with_ops(&irda_nl_family, irda_nl_ops);
+ return genl_register_family(&irda_nl_family);
}
void irda_nl_unregister(void)
diff --git a/net/l2tp/l2tp_netlink.c b/net/l2tp/l2tp_netlink.c
index 4fbf1f41ac52..e4e8c0769a6b 100644
--- a/net/l2tp/l2tp_netlink.c
+++ b/net/l2tp/l2tp_netlink.c
@@ -31,13 +31,7 @@
#include "l2tp_core.h"
-static struct genl_family l2tp_nl_family = {
- .name = L2TP_GENL_NAME,
- .version = L2TP_GENL_VERSION,
- .hdrsize = 0,
- .maxattr = L2TP_ATTR_MAX,
- .netnsok = true,
-};
+static struct genl_family l2tp_nl_family;
static const struct genl_multicast_group l2tp_multicast_group[] = {
{
@@ -976,6 +970,19 @@ static const struct genl_ops l2tp_nl_ops[] = {
},
};
+static struct genl_family l2tp_nl_family = {
+ .name = L2TP_GENL_NAME,
+ .version = L2TP_GENL_VERSION,
+ .hdrsize = 0,
+ .maxattr = L2TP_ATTR_MAX,
+ .netnsok = true,
+ .module = THIS_MODULE,
+ .ops = l2tp_nl_ops,
+ .n_ops = ARRAY_SIZE(l2tp_nl_ops),
+ .mcgrps = l2tp_multicast_group,
+ .n_mcgrps = ARRAY_SIZE(l2tp_multicast_group),
+};
+
int l2tp_nl_register_ops(enum l2tp_pwtype pw_type, const struct l2tp_nl_cmd_ops *ops)
{
int ret;
@@ -1012,9 +1019,7 @@ EXPORT_SYMBOL_GPL(l2tp_nl_unregister_ops);
static int l2tp_nl_init(void)
{
pr_info("L2TP netlink interface\n");
- return genl_register_family_with_ops_groups(&l2tp_nl_family,
- l2tp_nl_ops,
- l2tp_multicast_group);
+ return genl_register_family(&l2tp_nl_family);
}
static void l2tp_nl_cleanup(void)
diff --git a/net/netfilter/ipvs/ip_vs_ctl.c b/net/netfilter/ipvs/ip_vs_ctl.c
index ceed66cdd03e..ea3e8aed063f 100644
--- a/net/netfilter/ipvs/ip_vs_ctl.c
+++ b/net/netfilter/ipvs/ip_vs_ctl.c
@@ -2840,13 +2840,7 @@ static struct nf_sockopt_ops ip_vs_sockopts = {
*/
/* IPVS genetlink family */
-static struct genl_family ip_vs_genl_family = {
- .hdrsize = 0,
- .name = IPVS_GENL_NAME,
- .version = IPVS_GENL_VERSION,
- .maxattr = IPVS_CMD_MAX,
- .netnsok = true, /* Make ipvsadm to work on netns */
-};
+static struct genl_family ip_vs_genl_family;
/* Policy used for first-level command attributes */
static const struct nla_policy ip_vs_cmd_policy[IPVS_CMD_ATTR_MAX + 1] = {
@@ -3871,10 +3865,20 @@ static const struct genl_ops ip_vs_genl_ops[] = {
},
};
+static struct genl_family ip_vs_genl_family = {
+ .hdrsize = 0,
+ .name = IPVS_GENL_NAME,
+ .version = IPVS_GENL_VERSION,
+ .maxattr = IPVS_CMD_MAX,
+ .netnsok = true, /* Make ipvsadm to work on netns */
+ .module = THIS_MODULE,
+ .ops = ip_vs_genl_ops,
+ .n_ops = ARRAY_SIZE(ip_vs_genl_ops),
+};
+
static int __init ip_vs_genl_register(void)
{
- return genl_register_family_with_ops(&ip_vs_genl_family,
- ip_vs_genl_ops);
+ return genl_register_family(&ip_vs_genl_family);
}
static void ip_vs_genl_unregister(void)
diff --git a/net/netlabel/netlabel_calipso.c b/net/netlabel/netlabel_calipso.c
index 152e503b8c5d..ca7c9c411a5c 100644
--- a/net/netlabel/netlabel_calipso.c
+++ b/net/netlabel/netlabel_calipso.c
@@ -60,12 +60,7 @@ struct netlbl_domhsh_walk_arg {
};
/* NetLabel Generic NETLINK CALIPSO family */
-static struct genl_family netlbl_calipso_gnl_family = {
- .hdrsize = 0,
- .name = NETLBL_NLTYPE_CALIPSO_NAME,
- .version = NETLBL_PROTO_VERSION,
- .maxattr = NLBL_CALIPSO_A_MAX,
-};
+static struct genl_family netlbl_calipso_gnl_family;
/* NetLabel Netlink attribute policy */
static const struct nla_policy calipso_genl_policy[NLBL_CALIPSO_A_MAX + 1] = {
@@ -354,6 +349,16 @@ static const struct genl_ops netlbl_calipso_ops[] = {
},
};
+static struct genl_family netlbl_calipso_gnl_family = {
+ .hdrsize = 0,
+ .name = NETLBL_NLTYPE_CALIPSO_NAME,
+ .version = NETLBL_PROTO_VERSION,
+ .maxattr = NLBL_CALIPSO_A_MAX,
+ .module = THIS_MODULE,
+ .ops = netlbl_calipso_ops,
+ .n_ops = ARRAY_SIZE(netlbl_calipso_ops),
+};
+
/* NetLabel Generic NETLINK Protocol Functions
*/
@@ -367,8 +372,7 @@ static const struct genl_ops netlbl_calipso_ops[] = {
*/
int __init netlbl_calipso_genl_init(void)
{
- return genl_register_family_with_ops(&netlbl_calipso_gnl_family,
- netlbl_calipso_ops);
+ return genl_register_family(&netlbl_calipso_gnl_family);
}
static const struct netlbl_calipso_ops *calipso_ops;
diff --git a/net/netlabel/netlabel_cipso_v4.c b/net/netlabel/netlabel_cipso_v4.c
index 755b284e7ad4..a665eae91245 100644
--- a/net/netlabel/netlabel_cipso_v4.c
+++ b/net/netlabel/netlabel_cipso_v4.c
@@ -59,13 +59,7 @@ struct netlbl_domhsh_walk_arg {
};
/* NetLabel Generic NETLINK CIPSOv4 family */
-static struct genl_family netlbl_cipsov4_gnl_family = {
- .hdrsize = 0,
- .name = NETLBL_NLTYPE_CIPSOV4_NAME,
- .version = NETLBL_PROTO_VERSION,
- .maxattr = NLBL_CIPSOV4_A_MAX,
-};
-
+static struct genl_family netlbl_cipsov4_gnl_family;
/* NetLabel Netlink attribute policy */
static const struct nla_policy netlbl_cipsov4_genl_policy[NLBL_CIPSOV4_A_MAX + 1] = {
[NLBL_CIPSOV4_A_DOI] = { .type = NLA_U32 },
@@ -766,6 +760,16 @@ static const struct genl_ops netlbl_cipsov4_ops[] = {
},
};
+static struct genl_family netlbl_cipsov4_gnl_family = {
+ .hdrsize = 0,
+ .name = NETLBL_NLTYPE_CIPSOV4_NAME,
+ .version = NETLBL_PROTO_VERSION,
+ .maxattr = NLBL_CIPSOV4_A_MAX,
+ .module = THIS_MODULE,
+ .ops = netlbl_cipsov4_ops,
+ .n_ops = ARRAY_SIZE(netlbl_cipsov4_ops),
+};
+
/*
* NetLabel Generic NETLINK Protocol Functions
*/
@@ -780,6 +784,5 @@ static const struct genl_ops netlbl_cipsov4_ops[] = {
*/
int __init netlbl_cipsov4_genl_init(void)
{
- return genl_register_family_with_ops(&netlbl_cipsov4_gnl_family,
- netlbl_cipsov4_ops);
+ return genl_register_family(&netlbl_cipsov4_gnl_family);
}
diff --git a/net/netlabel/netlabel_mgmt.c b/net/netlabel/netlabel_mgmt.c
index 3b00f2368fcd..ecfe8eb149db 100644
--- a/net/netlabel/netlabel_mgmt.c
+++ b/net/netlabel/netlabel_mgmt.c
@@ -60,12 +60,7 @@ struct netlbl_domhsh_walk_arg {
};
/* NetLabel Generic NETLINK CIPSOv4 family */
-static struct genl_family netlbl_mgmt_gnl_family = {
- .hdrsize = 0,
- .name = NETLBL_NLTYPE_MGMT_NAME,
- .version = NETLBL_PROTO_VERSION,
- .maxattr = NLBL_MGMT_A_MAX,
-};
+static struct genl_family netlbl_mgmt_gnl_family;
/* NetLabel Netlink attribute policy */
static const struct nla_policy netlbl_mgmt_genl_policy[NLBL_MGMT_A_MAX + 1] = {
@@ -833,6 +828,16 @@ static const struct genl_ops netlbl_mgmt_genl_ops[] = {
},
};
+static struct genl_family netlbl_mgmt_gnl_family = {
+ .hdrsize = 0,
+ .name = NETLBL_NLTYPE_MGMT_NAME,
+ .version = NETLBL_PROTO_VERSION,
+ .maxattr = NLBL_MGMT_A_MAX,
+ .module = THIS_MODULE,
+ .ops = netlbl_mgmt_genl_ops,
+ .n_ops = ARRAY_SIZE(netlbl_mgmt_genl_ops),
+};
+
/*
* NetLabel Generic NETLINK Protocol Functions
*/
@@ -847,6 +852,5 @@ static const struct genl_ops netlbl_mgmt_genl_ops[] = {
*/
int __init netlbl_mgmt_genl_init(void)
{
- return genl_register_family_with_ops(&netlbl_mgmt_gnl_family,
- netlbl_mgmt_genl_ops);
+ return genl_register_family(&netlbl_mgmt_gnl_family);
}
diff --git a/net/netlabel/netlabel_unlabeled.c b/net/netlabel/netlabel_unlabeled.c
index c2ea8d1f653a..5dbbad41114f 100644
--- a/net/netlabel/netlabel_unlabeled.c
+++ b/net/netlabel/netlabel_unlabeled.c
@@ -123,12 +123,7 @@ static struct netlbl_unlhsh_iface __rcu *netlbl_unlhsh_def;
static u8 netlabel_unlabel_acceptflg;
/* NetLabel Generic NETLINK unlabeled family */
-static struct genl_family netlbl_unlabel_gnl_family = {
- .hdrsize = 0,
- .name = NETLBL_NLTYPE_UNLABELED_NAME,
- .version = NETLBL_PROTO_VERSION,
- .maxattr = NLBL_UNLABEL_A_MAX,
-};
+static struct genl_family netlbl_unlabel_gnl_family;
/* NetLabel Netlink attribute policy */
static const struct nla_policy netlbl_unlabel_genl_policy[NLBL_UNLABEL_A_MAX + 1] = {
@@ -1377,6 +1372,16 @@ static const struct genl_ops netlbl_unlabel_genl_ops[] = {
},
};
+static struct genl_family netlbl_unlabel_gnl_family = {
+ .hdrsize = 0,
+ .name = NETLBL_NLTYPE_UNLABELED_NAME,
+ .version = NETLBL_PROTO_VERSION,
+ .maxattr = NLBL_UNLABEL_A_MAX,
+ .module = THIS_MODULE,
+ .ops = netlbl_unlabel_genl_ops,
+ .n_ops = ARRAY_SIZE(netlbl_unlabel_genl_ops),
+};
+
/*
* NetLabel Generic NETLINK Protocol Functions
*/
@@ -1391,8 +1396,7 @@ static const struct genl_ops netlbl_unlabel_genl_ops[] = {
*/
int __init netlbl_unlabel_genl_init(void)
{
- return genl_register_family_with_ops(&netlbl_unlabel_gnl_family,
- netlbl_unlabel_genl_ops);
+ return genl_register_family(&netlbl_unlabel_gnl_family);
}
/*
diff --git a/net/netlink/genetlink.c b/net/netlink/genetlink.c
index f19ec969edee..ca582ee4ae05 100644
--- a/net/netlink/genetlink.c
+++ b/net/netlink/genetlink.c
@@ -344,18 +344,18 @@ static int genl_validate_ops(const struct genl_family *family)
}
/**
- * __genl_register_family - register a generic netlink family
+ * genl_register_family - register a generic netlink family
* @family: generic netlink family
*
* Registers the specified family after validating it first. Only one
* family may be registered with the same family name or identifier.
*
- * The family's ops array must already be assigned, you can use the
- * genl_register_family_with_ops() helper function.
+ * The family's ops, multicast groups and module pointer must already
+ * be assigned.
*
* Return 0 on success or a negative error code.
*/
-int __genl_register_family(struct genl_family *family)
+int genl_register_family(struct genl_family *family)
{
int err, i;
@@ -429,7 +429,7 @@ int __genl_register_family(struct genl_family *family)
genl_unlock_all();
return err;
}
-EXPORT_SYMBOL(__genl_register_family);
+EXPORT_SYMBOL(genl_register_family);
/**
* genl_unregister_family - unregister generic netlink family
@@ -452,7 +452,6 @@ int genl_unregister_family(struct genl_family *family)
genl_unregister_mc_groups(family);
list_del(&rc->family_list);
- family->n_ops = 0;
up_write(&cb_lock);
wait_event(genl_sk_destructing_waitq,
atomic_read(&genl_sk_destructing_cnt) == 0);
@@ -681,13 +680,7 @@ static void genl_rcv(struct sk_buff *skb)
* Controller
**************************************************************************/
-static struct genl_family genl_ctrl = {
- .id = GENL_ID_CTRL,
- .name = "nlctrl",
- .version = 0x2,
- .maxattr = CTRL_ATTR_MAX,
- .netnsok = true,
-};
+static struct genl_family genl_ctrl;
static int ctrl_fill_info(struct genl_family *family, u32 portid, u32 seq,
u32 flags, struct sk_buff *skb, u8 cmd)
@@ -997,6 +990,19 @@ static const struct genl_multicast_group genl_ctrl_groups[] = {
{ .name = "notify", },
};
+static struct genl_family genl_ctrl = {
+ .module = THIS_MODULE,
+ .ops = genl_ctrl_ops,
+ .n_ops = ARRAY_SIZE(genl_ctrl_ops),
+ .mcgrps = genl_ctrl_groups,
+ .n_mcgrps = ARRAY_SIZE(genl_ctrl_groups),
+ .id = GENL_ID_CTRL,
+ .name = "nlctrl",
+ .version = 0x2,
+ .maxattr = CTRL_ATTR_MAX,
+ .netnsok = true,
+};
+
static int genl_bind(struct net *net, int group)
{
int i, err = -ENOENT;
@@ -1086,8 +1092,7 @@ static int __init genl_init(void)
for (i = 0; i < GENL_FAM_TAB_SIZE; i++)
INIT_LIST_HEAD(&family_ht[i]);
- err = genl_register_family_with_ops_groups(&genl_ctrl, genl_ctrl_ops,
- genl_ctrl_groups);
+ err = genl_register_family(&genl_ctrl);
if (err < 0)
goto problem;
diff --git a/net/nfc/netlink.c b/net/nfc/netlink.c
index c230403e066c..450b1e5144cc 100644
--- a/net/nfc/netlink.c
+++ b/net/nfc/netlink.c
@@ -38,13 +38,7 @@ static const struct genl_multicast_group nfc_genl_mcgrps[] = {
{ .name = NFC_GENL_MCAST_EVENT_NAME, },
};
-static struct genl_family nfc_genl_family = {
- .hdrsize = 0,
- .name = NFC_GENL_NAME,
- .version = NFC_GENL_VERSION,
- .maxattr = NFC_ATTR_MAX,
-};
-
+static struct genl_family nfc_genl_family;
static const struct nla_policy nfc_genl_policy[NFC_ATTR_MAX + 1] = {
[NFC_ATTR_DEVICE_INDEX] = { .type = NLA_U32 },
[NFC_ATTR_DEVICE_NAME] = { .type = NLA_STRING,
@@ -1752,6 +1746,18 @@ static const struct genl_ops nfc_genl_ops[] = {
},
};
+static struct genl_family nfc_genl_family = {
+ .hdrsize = 0,
+ .name = NFC_GENL_NAME,
+ .version = NFC_GENL_VERSION,
+ .maxattr = NFC_ATTR_MAX,
+ .module = THIS_MODULE,
+ .ops = nfc_genl_ops,
+ .n_ops = ARRAY_SIZE(nfc_genl_ops),
+ .mcgrps = nfc_genl_mcgrps,
+ .n_mcgrps = ARRAY_SIZE(nfc_genl_mcgrps),
+};
+
struct urelease_work {
struct work_struct w;
@@ -1837,9 +1843,7 @@ int __init nfc_genl_init(void)
{
int rc;
- rc = genl_register_family_with_ops_groups(&nfc_genl_family,
- nfc_genl_ops,
- nfc_genl_mcgrps);
+ rc = genl_register_family(&nfc_genl_family);
if (rc)
return rc;
diff --git a/net/openvswitch/datapath.c b/net/openvswitch/datapath.c
index f9fef7dfba15..ad6a111a0014 100644
--- a/net/openvswitch/datapath.c
+++ b/net/openvswitch/datapath.c
@@ -679,6 +679,7 @@ static struct genl_family dp_packet_genl_family = {
.parallel_ops = true,
.ops = dp_packet_genl_ops,
.n_ops = ARRAY_SIZE(dp_packet_genl_ops),
+ .module = THIS_MODULE,
};
static void get_dp_stats(const struct datapath *dp, struct ovs_dp_stats *stats,
@@ -1445,6 +1446,7 @@ static struct genl_family dp_flow_genl_family = {
.n_ops = ARRAY_SIZE(dp_flow_genl_ops),
.mcgrps = &ovs_dp_flow_multicast_group,
.n_mcgrps = 1,
+ .module = THIS_MODULE,
};
static size_t ovs_dp_cmd_msg_size(void)
@@ -1830,6 +1832,7 @@ static struct genl_family dp_datapath_genl_family = {
.n_ops = ARRAY_SIZE(dp_datapath_genl_ops),
.mcgrps = &ovs_dp_datapath_multicast_group,
.n_mcgrps = 1,
+ .module = THIS_MODULE,
};
/* Called with ovs_mutex or RCU read lock. */
@@ -2251,6 +2254,7 @@ struct genl_family dp_vport_genl_family = {
.n_ops = ARRAY_SIZE(dp_vport_genl_ops),
.mcgrps = &ovs_dp_vport_multicast_group,
.n_mcgrps = 1,
+ .module = THIS_MODULE,
};
static struct genl_family * const dp_genl_families[] = {
diff --git a/net/tipc/netlink.c b/net/tipc/netlink.c
index 383b8fedabc7..74a405bf107b 100644
--- a/net/tipc/netlink.c
+++ b/net/tipc/netlink.c
@@ -135,14 +135,6 @@ const struct nla_policy tipc_nl_udp_policy[TIPC_NLA_UDP_MAX + 1] = {
/* Users of the legacy API (tipc-config) can't handle that we add operations,
* so we have a separate genl handling for the new API.
*/
-struct genl_family tipc_genl_family = {
- .name = TIPC_GENL_V2_NAME,
- .version = TIPC_GENL_V2_VERSION,
- .hdrsize = 0,
- .maxattr = TIPC_NLA_MAX,
- .netnsok = true,
-};
-
static const struct genl_ops tipc_genl_v2_ops[] = {
{
.cmd = TIPC_NL_BEARER_DISABLE,
@@ -257,6 +249,17 @@ static const struct genl_ops tipc_genl_v2_ops[] = {
#endif
};
+struct genl_family tipc_genl_family = {
+ .name = TIPC_GENL_V2_NAME,
+ .version = TIPC_GENL_V2_VERSION,
+ .hdrsize = 0,
+ .maxattr = TIPC_NLA_MAX,
+ .netnsok = true,
+ .module = THIS_MODULE,
+ .ops = tipc_genl_v2_ops,
+ .n_ops = ARRAY_SIZE(tipc_genl_v2_ops),
+};
+
int tipc_nlmsg_parse(const struct nlmsghdr *nlh, struct nlattr ***attr)
{
u32 maxattr = tipc_genl_family.maxattr;
@@ -272,8 +275,7 @@ int tipc_netlink_start(void)
{
int res;
- res = genl_register_family_with_ops(&tipc_genl_family,
- tipc_genl_v2_ops);
+ res = genl_register_family(&tipc_genl_family);
if (res) {
pr_err("Failed to register netlink interface\n");
return res;
diff --git a/net/tipc/netlink_compat.c b/net/tipc/netlink_compat.c
index f04428e4c8e5..07b19931e458 100644
--- a/net/tipc/netlink_compat.c
+++ b/net/tipc/netlink_compat.c
@@ -1215,27 +1215,29 @@ static int tipc_nl_compat_recv(struct sk_buff *skb, struct genl_info *info)
return err;
}
+static struct genl_ops tipc_genl_compat_ops[] = {
+ {
+ .cmd = TIPC_GENL_CMD,
+ .doit = tipc_nl_compat_recv,
+ },
+};
+
static struct genl_family tipc_genl_compat_family = {
.name = TIPC_GENL_NAME,
.version = TIPC_GENL_VERSION,
.hdrsize = TIPC_GENL_HDRLEN,
.maxattr = 0,
.netnsok = true,
-};
-
-static struct genl_ops tipc_genl_compat_ops[] = {
- {
- .cmd = TIPC_GENL_CMD,
- .doit = tipc_nl_compat_recv,
- },
+ .module = THIS_MODULE,
+ .ops = tipc_genl_compat_ops,
+ .n_ops = ARRAY_SIZE(tipc_genl_compat_ops),
};
int tipc_netlink_compat_start(void)
{
int res;
- res = genl_register_family_with_ops(&tipc_genl_compat_family,
- tipc_genl_compat_ops);
+ res = genl_register_family(&tipc_genl_compat_family);
if (res) {
pr_err("Failed to register legacy compat interface\n");
return res;
diff --git a/net/wimax/stack.c b/net/wimax/stack.c
index 8ac83a41585f..587e1627681f 100644
--- a/net/wimax/stack.c
+++ b/net/wimax/stack.c
@@ -572,15 +572,20 @@ struct d_level D_LEVEL[] = {
size_t D_LEVEL_SIZE = ARRAY_SIZE(D_LEVEL);
+static const struct genl_multicast_group wimax_gnl_mcgrps[] = {
+ { .name = "msg", },
+};
+
struct genl_family wimax_gnl_family = {
.name = "WiMAX",
.version = WIMAX_GNL_VERSION,
.hdrsize = 0,
.maxattr = WIMAX_GNL_ATTR_MAX,
-};
-
-static const struct genl_multicast_group wimax_gnl_mcgrps[] = {
- { .name = "msg", },
+ .module = THIS_MODULE,
+ .ops = wimax_gnl_ops,
+ .n_ops = ARRAY_SIZE(wimax_gnl_ops),
+ .mcgrps = wimax_gnl_mcgrps,
+ .n_mcgrps = ARRAY_SIZE(wimax_gnl_mcgrps),
};
@@ -595,11 +600,7 @@ int __init wimax_subsys_init(void)
d_parse_params(D_LEVEL, D_LEVEL_SIZE, wimax_debug_params,
"wimax.debug");
- snprintf(wimax_gnl_family.name, sizeof(wimax_gnl_family.name),
- "WiMAX");
- result = genl_register_family_with_ops_groups(&wimax_gnl_family,
- wimax_gnl_ops,
- wimax_gnl_mcgrps);
+ result = genl_register_family(&wimax_gnl_family);
if (unlikely(result < 0)) {
pr_err("cannot register generic netlink family: %d\n", result);
goto error_register_family;
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index 714beafe05e0..8e5ca3c47593 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -32,21 +32,8 @@ static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
struct cfg80211_crypto_settings *settings,
int cipher_limit);
-static int nl80211_pre_doit(const struct genl_ops *ops, struct sk_buff *skb,
- struct genl_info *info);
-static void nl80211_post_doit(const struct genl_ops *ops, struct sk_buff *skb,
- struct genl_info *info);
-
/* the netlink family */
-static struct genl_family nl80211_fam = {
- .name = NL80211_GENL_NAME, /* have users key off the name instead */
- .hdrsize = 0, /* no private header */
- .version = 1, /* no particular meaning now */
- .maxattr = NL80211_ATTR_MAX,
- .netnsok = true,
- .pre_doit = nl80211_pre_doit,
- .post_doit = nl80211_post_doit,
-};
+static struct genl_family nl80211_fam;
/* multicast groups */
enum nl80211_multicast_groups {
@@ -12599,6 +12586,21 @@ static const struct genl_ops nl80211_ops[] = {
},
};
+static struct genl_family nl80211_fam = {
+ .name = NL80211_GENL_NAME, /* have users key off the name instead */
+ .hdrsize = 0, /* no private header */
+ .version = 1, /* no particular meaning now */
+ .maxattr = NL80211_ATTR_MAX,
+ .netnsok = true,
+ .pre_doit = nl80211_pre_doit,
+ .post_doit = nl80211_post_doit,
+ .module = THIS_MODULE,
+ .ops = nl80211_ops,
+ .n_ops = ARRAY_SIZE(nl80211_ops),
+ .mcgrps = nl80211_mcgrps,
+ .n_mcgrps = ARRAY_SIZE(nl80211_mcgrps),
+};
+
/* notification functions */
void nl80211_notify_wiphy(struct cfg80211_registered_device *rdev,
@@ -14565,8 +14567,7 @@ int nl80211_init(void)
{
int err;
- err = genl_register_family_with_ops_groups(&nl80211_fam, nl80211_ops,
- nl80211_mcgrps);
+ err = genl_register_family(&nl80211_fam);
if (err)
return err;
--
2.8.1
^ permalink raw reply related [flat|nested] 22+ messages in thread
* [PATCH 4/5] genetlink: use idr to track families
2016-10-24 12:40 [PATCH 0/5] genetlink improvements Johannes Berg
` (2 preceding siblings ...)
2016-10-24 12:40 ` [PATCH 3/5] genetlink: statically initialize families Johannes Berg
@ 2016-10-24 12:40 ` Johannes Berg
2016-10-24 12:40 ` [PATCH 5/5] genetlink: mark families as __ro_after_init Johannes Berg
` (2 subsequent siblings)
6 siblings, 0 replies; 22+ messages in thread
From: Johannes Berg @ 2016-10-24 12:40 UTC (permalink / raw)
To: netdev; +Cc: Johannes Berg
From: Johannes Berg <johannes.berg@intel.com>
Since generic netlink family IDs are small integers, allocated
densely, IDR is an ideal match for lookups. Replace the existing
hand-written hash-table with IDR for allocation and lookup.
This lets the families only be written to once, during register,
since the list_head can be removed and removal of a family won't
cause any writes.
It also slightly reduces the code size (by about 1.3k on x86-64).
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
---
include/net/genetlink.h | 31 +++--
include/uapi/linux/genetlink.h | 2 +
net/netlink/genetlink.c | 271 ++++++++++++++++-------------------------
3 files changed, 123 insertions(+), 181 deletions(-)
diff --git a/include/net/genetlink.h b/include/net/genetlink.h
index 2298b50cee34..3ec87bacc0f5 100644
--- a/include/net/genetlink.h
+++ b/include/net/genetlink.h
@@ -40,7 +40,6 @@ struct genl_info;
* generic netlink family is removed while there are still open
* sockets.
* @attrbuf: buffer to store parsed attributes (private)
- * @family_list: family list (private)
* @mcgrps: multicast groups used by this family
* @n_mcgrps: number of multicast groups
* @mcgrp_offset: starting number of multicast group IDs in this family
@@ -70,11 +69,10 @@ struct genl_family {
unsigned int n_ops;
unsigned int n_mcgrps;
unsigned int mcgrp_offset; /* private */
- struct list_head family_list; /* private */
struct module *module;
};
-struct nlattr **genl_family_attrbuf(struct genl_family *family);
+struct nlattr **genl_family_attrbuf(const struct genl_family *family);
/**
* struct genl_info - receiving information
@@ -134,12 +132,12 @@ struct genl_ops {
};
int genl_register_family(struct genl_family *family);
-int genl_unregister_family(struct genl_family *family);
-void genl_notify(struct genl_family *family, struct sk_buff *skb,
+int genl_unregister_family(const struct genl_family *family);
+void genl_notify(const struct genl_family *family, struct sk_buff *skb,
struct genl_info *info, u32 group, gfp_t flags);
void *genlmsg_put(struct sk_buff *skb, u32 portid, u32 seq,
- struct genl_family *family, int flags, u8 cmd);
+ const struct genl_family *family, int flags, u8 cmd);
/**
* genlmsg_nlhdr - Obtain netlink header from user specified header
@@ -148,8 +146,8 @@ void *genlmsg_put(struct sk_buff *skb, u32 portid, u32 seq,
*
* Returns pointer to netlink header.
*/
-static inline struct nlmsghdr *genlmsg_nlhdr(void *user_hdr,
- struct genl_family *family)
+static inline struct nlmsghdr *
+genlmsg_nlhdr(void *user_hdr, const struct genl_family *family)
{
return (struct nlmsghdr *)((char *)user_hdr -
family->hdrsize -
@@ -185,7 +183,7 @@ static inline int genlmsg_parse(const struct nlmsghdr *nlh,
*/
static inline void genl_dump_check_consistent(struct netlink_callback *cb,
void *user_hdr,
- struct genl_family *family)
+ const struct genl_family *family)
{
nl_dump_check_consistent(cb, genlmsg_nlhdr(user_hdr, family));
}
@@ -202,7 +200,7 @@ static inline void genl_dump_check_consistent(struct netlink_callback *cb,
*/
static inline void *genlmsg_put_reply(struct sk_buff *skb,
struct genl_info *info,
- struct genl_family *family,
+ const struct genl_family *family,
int flags, u8 cmd)
{
return genlmsg_put(skb, info->snd_portid, info->snd_seq, family,
@@ -239,7 +237,7 @@ static inline void genlmsg_cancel(struct sk_buff *skb, void *hdr)
* @group: offset of multicast group in groups array
* @flags: allocation flags
*/
-static inline int genlmsg_multicast_netns(struct genl_family *family,
+static inline int genlmsg_multicast_netns(const struct genl_family *family,
struct net *net, struct sk_buff *skb,
u32 portid, unsigned int group, gfp_t flags)
{
@@ -257,7 +255,7 @@ static inline int genlmsg_multicast_netns(struct genl_family *family,
* @group: offset of multicast group in groups array
* @flags: allocation flags
*/
-static inline int genlmsg_multicast(struct genl_family *family,
+static inline int genlmsg_multicast(const struct genl_family *family,
struct sk_buff *skb, u32 portid,
unsigned int group, gfp_t flags)
{
@@ -275,7 +273,7 @@ static inline int genlmsg_multicast(struct genl_family *family,
*
* This function must hold the RTNL or rcu_read_lock().
*/
-int genlmsg_multicast_allns(struct genl_family *family,
+int genlmsg_multicast_allns(const struct genl_family *family,
struct sk_buff *skb, u32 portid,
unsigned int group, gfp_t flags);
@@ -359,8 +357,9 @@ static inline struct sk_buff *genlmsg_new(size_t payload, gfp_t flags)
* This function returns the number of broadcast listeners that have set the
* NETLINK_RECV_NO_ENOBUFS socket option.
*/
-static inline int genl_set_err(struct genl_family *family, struct net *net,
- u32 portid, u32 group, int code)
+static inline int genl_set_err(const struct genl_family *family,
+ struct net *net, u32 portid,
+ u32 group, int code)
{
if (WARN_ON_ONCE(group >= family->n_mcgrps))
return -EINVAL;
@@ -368,7 +367,7 @@ static inline int genl_set_err(struct genl_family *family, struct net *net,
return netlink_set_err(net->genl_sock, portid, group, code);
}
-static inline int genl_has_listeners(struct genl_family *family,
+static inline int genl_has_listeners(const struct genl_family *family,
struct net *net, unsigned int group)
{
if (WARN_ON_ONCE(group >= family->n_mcgrps))
diff --git a/include/uapi/linux/genetlink.h b/include/uapi/linux/genetlink.h
index d9b2db4a29c6..adc899381e0d 100644
--- a/include/uapi/linux/genetlink.h
+++ b/include/uapi/linux/genetlink.h
@@ -29,6 +29,8 @@ struct genlmsghdr {
#define GENL_ID_CTRL NLMSG_MIN_TYPE
#define GENL_ID_VFS_DQUOT (NLMSG_MIN_TYPE + 1)
#define GENL_ID_PMCRAID (NLMSG_MIN_TYPE + 2)
+/* must be last reserved + 1 */
+#define GENL_START_ALLOC (NLMSG_MIN_TYPE + 3)
/**************************************************************************
* Controller
diff --git a/net/netlink/genetlink.c b/net/netlink/genetlink.c
index ca582ee4ae05..85659921e7b2 100644
--- a/net/netlink/genetlink.c
+++ b/net/netlink/genetlink.c
@@ -17,6 +17,7 @@
#include <linux/mutex.h>
#include <linux/bitmap.h>
#include <linux/rwsem.h>
+#include <linux/idr.h>
#include <net/sock.h>
#include <net/genetlink.h>
@@ -58,10 +59,8 @@ static void genl_unlock_all(void)
up_write(&cb_lock);
}
-#define GENL_FAM_TAB_SIZE 16
-#define GENL_FAM_TAB_MASK (GENL_FAM_TAB_SIZE - 1)
+static DEFINE_IDR(genl_fam_idr);
-static struct list_head family_ht[GENL_FAM_TAB_SIZE];
/*
* Bitmap of multicast groups that are currently in use.
*
@@ -86,45 +85,29 @@ static unsigned long mc_group_start = 0x3 | BIT(GENL_ID_CTRL) |
static unsigned long *mc_groups = &mc_group_start;
static unsigned long mc_groups_longs = 1;
-static int genl_ctrl_event(int event, struct genl_family *family,
+static int genl_ctrl_event(int event, const struct genl_family *family,
const struct genl_multicast_group *grp,
int grp_id);
-static inline unsigned int genl_family_hash(unsigned int id)
+static const struct genl_family *genl_family_find_byid(unsigned int id)
{
- return id & GENL_FAM_TAB_MASK;
+ return idr_find(&genl_fam_idr, id);
}
-static inline struct list_head *genl_family_chain(unsigned int id)
+static const struct genl_family *genl_family_find_byname(char *name)
{
- return &family_ht[genl_family_hash(id)];
-}
-
-static struct genl_family *genl_family_find_byid(unsigned int id)
-{
- struct genl_family *f;
+ const struct genl_family *family;
+ unsigned int id;
- list_for_each_entry(f, genl_family_chain(id), family_list)
- if (f->id == id)
- return f;
+ idr_for_each_entry(&genl_fam_idr, family, id)
+ if (strcmp(family->name, name) == 0)
+ return family;
return NULL;
}
-static struct genl_family *genl_family_find_byname(char *name)
-{
- struct genl_family *f;
- int i;
-
- for (i = 0; i < GENL_FAM_TAB_SIZE; i++)
- list_for_each_entry(f, genl_family_chain(i), family_list)
- if (strcmp(f->name, name) == 0)
- return f;
-
- return NULL;
-}
-
-static const struct genl_ops *genl_get_cmd(u8 cmd, struct genl_family *family)
+static const struct genl_ops *genl_get_cmd(u8 cmd,
+ const struct genl_family *family)
{
int i;
@@ -135,26 +118,6 @@ static const struct genl_ops *genl_get_cmd(u8 cmd, struct genl_family *family)
return NULL;
}
-/* Of course we are going to have problems once we hit
- * 2^16 alive types, but that can only happen by year 2K
-*/
-static u16 genl_generate_id(void)
-{
- static u16 id_gen_idx = GENL_MIN_ID;
- int i;
-
- for (i = 0; i <= GENL_MAX_ID - GENL_MIN_ID; i++) {
- if (id_gen_idx != GENL_ID_VFS_DQUOT &&
- id_gen_idx != GENL_ID_PMCRAID &&
- !genl_family_find_byid(id_gen_idx))
- return id_gen_idx;
- if (++id_gen_idx > GENL_MAX_ID)
- id_gen_idx = GENL_MIN_ID;
- }
-
- return 0;
-}
-
static int genl_allocate_reserve_groups(int n_groups, int *first_id)
{
unsigned long *new_groups;
@@ -295,7 +258,7 @@ static int genl_validate_assign_mc_groups(struct genl_family *family)
return err;
}
-static void genl_unregister_mc_groups(struct genl_family *family)
+static void genl_unregister_mc_groups(const struct genl_family *family)
{
struct net *net;
int i;
@@ -358,6 +321,7 @@ static int genl_validate_ops(const struct genl_family *family)
int genl_register_family(struct genl_family *family)
{
int err, i;
+ int start = GENL_START_ALLOC, end = GENL_MAX_ID;
err = genl_validate_ops(family);
if (err)
@@ -370,34 +334,20 @@ int genl_register_family(struct genl_family *family)
goto errout_locked;
}
+ /*
+ * Sadly, a few cases need to be special-cased
+ * due to them having previously abused the API
+ * and having used their family ID also as their
+ * multicast group ID, so we use reserved IDs
+ * for both to be sure we can do that mapping.
+ */
if (family == &genl_ctrl) {
- family->id = GENL_ID_CTRL;
- } else {
- u16 newid;
-
- /* this should be left zero in the struct */
- WARN_ON(family->id);
-
- /*
- * Sadly, a few cases need to be special-cased
- * due to them having previously abused the API
- * and having used their family ID also as their
- * multicast group ID, so we use reserved IDs
- * for both to be sure we can do that mapping.
- */
- if (strcmp(family->name, "pmcraid") == 0)
- newid = GENL_ID_PMCRAID;
- else if (strcmp(family->name, "VFS_DQUOT") == 0)
- newid = GENL_ID_VFS_DQUOT;
- else
- newid = genl_generate_id();
-
- if (!newid) {
- err = -ENOMEM;
- goto errout_locked;
- }
-
- family->id = newid;
+ /* and this needs to be special for initial family lookups */
+ start = end = GENL_ID_CTRL;
+ } else if (strcmp(family->name, "pmcraid") == 0) {
+ start = end = GENL_ID_PMCRAID;
+ } else if (strcmp(family->name, "VFS_DQUOT") == 0) {
+ start = end = GENL_ID_VFS_DQUOT;
}
if (family->maxattr && !family->parallel_ops) {
@@ -410,11 +360,15 @@ int genl_register_family(struct genl_family *family)
} else
family->attrbuf = NULL;
+ family->id = idr_alloc(&genl_fam_idr, family,
+ start, end + 1, GFP_KERNEL);
+ if (!family->id)
+ goto errout_locked;
+
err = genl_validate_assign_mc_groups(family);
if (err)
- goto errout_locked;
+ goto errout_remove;
- list_add_tail(&family->family_list, genl_family_chain(family->id));
genl_unlock_all();
/* send all events */
@@ -425,6 +379,8 @@ int genl_register_family(struct genl_family *family)
return 0;
+errout_remove:
+ idr_remove(&genl_fam_idr, family->id);
errout_locked:
genl_unlock_all();
return err;
@@ -439,32 +395,29 @@ EXPORT_SYMBOL(genl_register_family);
*
* Returns 0 on success or a negative error code.
*/
-int genl_unregister_family(struct genl_family *family)
+int genl_unregister_family(const struct genl_family *family)
{
- struct genl_family *rc;
-
genl_lock_all();
- list_for_each_entry(rc, genl_family_chain(family->id), family_list) {
- if (family->id != rc->id || strcmp(rc->name, family->name))
- continue;
+ if (genl_family_find_byid(family->id)) {
+ genl_unlock_all();
+ return -ENOENT;
+ }
- genl_unregister_mc_groups(family);
+ genl_unregister_mc_groups(family);
- list_del(&rc->family_list);
- up_write(&cb_lock);
- wait_event(genl_sk_destructing_waitq,
- atomic_read(&genl_sk_destructing_cnt) == 0);
- genl_unlock();
+ idr_remove(&genl_fam_idr, family->id);
- kfree(family->attrbuf);
- genl_ctrl_event(CTRL_CMD_DELFAMILY, family, NULL, 0);
- return 0;
- }
+ up_write(&cb_lock);
+ wait_event(genl_sk_destructing_waitq,
+ atomic_read(&genl_sk_destructing_cnt) == 0);
+ genl_unlock();
- genl_unlock_all();
+ kfree(family->attrbuf);
- return -ENOENT;
+ genl_ctrl_event(CTRL_CMD_DELFAMILY, family, NULL, 0);
+
+ return 0;
}
EXPORT_SYMBOL(genl_unregister_family);
@@ -480,7 +433,7 @@ EXPORT_SYMBOL(genl_unregister_family);
* Returns pointer to user specific header
*/
void *genlmsg_put(struct sk_buff *skb, u32 portid, u32 seq,
- struct genl_family *family, int flags, u8 cmd)
+ const struct genl_family *family, int flags, u8 cmd)
{
struct nlmsghdr *nlh;
struct genlmsghdr *hdr;
@@ -539,7 +492,7 @@ static int genl_lock_done(struct netlink_callback *cb)
return rc;
}
-static int genl_family_rcv_msg(struct genl_family *family,
+static int genl_family_rcv_msg(const struct genl_family *family,
struct sk_buff *skb,
struct nlmsghdr *nlh)
{
@@ -651,7 +604,7 @@ static int genl_family_rcv_msg(struct genl_family *family,
static int genl_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
{
- struct genl_family *family;
+ const struct genl_family *family;
int err;
family = genl_family_find_byid(nlh->nlmsg_type);
@@ -682,7 +635,7 @@ static void genl_rcv(struct sk_buff *skb)
static struct genl_family genl_ctrl;
-static int ctrl_fill_info(struct genl_family *family, u32 portid, u32 seq,
+static int ctrl_fill_info(const struct genl_family *family, u32 portid, u32 seq,
u32 flags, struct sk_buff *skb, u8 cmd)
{
void *hdr;
@@ -769,7 +722,7 @@ static int ctrl_fill_info(struct genl_family *family, u32 portid, u32 seq,
return -EMSGSIZE;
}
-static int ctrl_fill_mcgrp_info(struct genl_family *family,
+static int ctrl_fill_mcgrp_info(const struct genl_family *family,
const struct genl_multicast_group *grp,
int grp_id, u32 portid, u32 seq, u32 flags,
struct sk_buff *skb, u8 cmd)
@@ -812,37 +765,30 @@ static int ctrl_fill_mcgrp_info(struct genl_family *family,
static int ctrl_dumpfamily(struct sk_buff *skb, struct netlink_callback *cb)
{
-
- int i, n = 0;
+ int n = 0;
struct genl_family *rt;
struct net *net = sock_net(skb->sk);
- int chains_to_skip = cb->args[0];
- int fams_to_skip = cb->args[1];
-
- for (i = chains_to_skip; i < GENL_FAM_TAB_SIZE; i++) {
- n = 0;
- list_for_each_entry(rt, genl_family_chain(i), family_list) {
- if (!rt->netnsok && !net_eq(net, &init_net))
- continue;
- if (++n < fams_to_skip)
- continue;
- if (ctrl_fill_info(rt, NETLINK_CB(cb->skb).portid,
- cb->nlh->nlmsg_seq, NLM_F_MULTI,
- skb, CTRL_CMD_NEWFAMILY) < 0)
- goto errout;
- }
+ int fams_to_skip = cb->args[0];
+ unsigned int id;
- fams_to_skip = 0;
- }
+ idr_for_each_entry(&genl_fam_idr, rt, id) {
+ if (!rt->netnsok && !net_eq(net, &init_net))
+ continue;
+
+ if (n++ < fams_to_skip)
+ continue;
-errout:
- cb->args[0] = i;
- cb->args[1] = n;
+ if (ctrl_fill_info(rt, NETLINK_CB(cb->skb).portid,
+ cb->nlh->nlmsg_seq, NLM_F_MULTI,
+ skb, CTRL_CMD_NEWFAMILY) < 0)
+ break;
+ }
+ cb->args[0] = n;
return skb->len;
}
-static struct sk_buff *ctrl_build_family_msg(struct genl_family *family,
+static struct sk_buff *ctrl_build_family_msg(const struct genl_family *family,
u32 portid, int seq, u8 cmd)
{
struct sk_buff *skb;
@@ -862,7 +808,7 @@ static struct sk_buff *ctrl_build_family_msg(struct genl_family *family,
}
static struct sk_buff *
-ctrl_build_mcgrp_msg(struct genl_family *family,
+ctrl_build_mcgrp_msg(const struct genl_family *family,
const struct genl_multicast_group *grp,
int grp_id, u32 portid, int seq, u8 cmd)
{
@@ -892,7 +838,7 @@ static const struct nla_policy ctrl_policy[CTRL_ATTR_MAX+1] = {
static int ctrl_getfamily(struct sk_buff *skb, struct genl_info *info)
{
struct sk_buff *msg;
- struct genl_family *res = NULL;
+ const struct genl_family *res = NULL;
int err = -EINVAL;
if (info->attrs[CTRL_ATTR_FAMILY_ID]) {
@@ -936,7 +882,7 @@ static int ctrl_getfamily(struct sk_buff *skb, struct genl_info *info)
return genlmsg_reply(msg, info);
}
-static int genl_ctrl_event(int event, struct genl_family *family,
+static int genl_ctrl_event(int event, const struct genl_family *family,
const struct genl_multicast_group *grp,
int grp_id)
{
@@ -1005,25 +951,24 @@ static struct genl_family genl_ctrl = {
static int genl_bind(struct net *net, int group)
{
- int i, err = -ENOENT;
+ struct genl_family *f;
+ int err = -ENOENT;
+ unsigned int id;
down_read(&cb_lock);
- for (i = 0; i < GENL_FAM_TAB_SIZE; i++) {
- struct genl_family *f;
-
- list_for_each_entry(f, genl_family_chain(i), family_list) {
- if (group >= f->mcgrp_offset &&
- group < f->mcgrp_offset + f->n_mcgrps) {
- int fam_grp = group - f->mcgrp_offset;
-
- if (!f->netnsok && net != &init_net)
- err = -ENOENT;
- else if (f->mcast_bind)
- err = f->mcast_bind(net, fam_grp);
- else
- err = 0;
- break;
- }
+
+ idr_for_each_entry(&genl_fam_idr, f, id) {
+ if (group >= f->mcgrp_offset &&
+ group < f->mcgrp_offset + f->n_mcgrps) {
+ int fam_grp = group - f->mcgrp_offset;
+
+ if (!f->netnsok && net != &init_net)
+ err = -ENOENT;
+ else if (f->mcast_bind)
+ err = f->mcast_bind(net, fam_grp);
+ else
+ err = 0;
+ break;
}
}
up_read(&cb_lock);
@@ -1033,21 +978,19 @@ static int genl_bind(struct net *net, int group)
static void genl_unbind(struct net *net, int group)
{
- int i;
+ struct genl_family *f;
+ unsigned int id;
down_read(&cb_lock);
- for (i = 0; i < GENL_FAM_TAB_SIZE; i++) {
- struct genl_family *f;
- list_for_each_entry(f, genl_family_chain(i), family_list) {
- if (group >= f->mcgrp_offset &&
- group < f->mcgrp_offset + f->n_mcgrps) {
- int fam_grp = group - f->mcgrp_offset;
+ idr_for_each_entry(&genl_fam_idr, f, id) {
+ if (group >= f->mcgrp_offset &&
+ group < f->mcgrp_offset + f->n_mcgrps) {
+ int fam_grp = group - f->mcgrp_offset;
- if (f->mcast_unbind)
- f->mcast_unbind(net, fam_grp);
- break;
- }
+ if (f->mcast_unbind)
+ f->mcast_unbind(net, fam_grp);
+ break;
}
}
up_read(&cb_lock);
@@ -1087,10 +1030,7 @@ static struct pernet_operations genl_pernet_ops = {
static int __init genl_init(void)
{
- int i, err;
-
- for (i = 0; i < GENL_FAM_TAB_SIZE; i++)
- INIT_LIST_HEAD(&family_ht[i]);
+ int err;
err = genl_register_family(&genl_ctrl);
if (err < 0)
@@ -1118,7 +1058,7 @@ subsys_initcall(genl_init);
* You cannot use this function with a family that has parallel_ops
* and you can only use it within (pre/post) doit/dumpit callbacks.
*/
-struct nlattr **genl_family_attrbuf(struct genl_family *family)
+struct nlattr **genl_family_attrbuf(const struct genl_family *family)
{
if (!WARN_ON(family->parallel_ops))
lockdep_assert_held(&genl_mutex);
@@ -1156,8 +1096,9 @@ static int genlmsg_mcast(struct sk_buff *skb, u32 portid, unsigned long group,
return err;
}
-int genlmsg_multicast_allns(struct genl_family *family, struct sk_buff *skb,
- u32 portid, unsigned int group, gfp_t flags)
+int genlmsg_multicast_allns(const struct genl_family *family,
+ struct sk_buff *skb, u32 portid,
+ unsigned int group, gfp_t flags)
{
if (WARN_ON_ONCE(group >= family->n_mcgrps))
return -EINVAL;
@@ -1166,7 +1107,7 @@ int genlmsg_multicast_allns(struct genl_family *family, struct sk_buff *skb,
}
EXPORT_SYMBOL(genlmsg_multicast_allns);
-void genl_notify(struct genl_family *family, struct sk_buff *skb,
+void genl_notify(const struct genl_family *family, struct sk_buff *skb,
struct genl_info *info, u32 group, gfp_t flags)
{
struct net *net = genl_info_net(info);
--
2.8.1
^ permalink raw reply related [flat|nested] 22+ messages in thread
* [PATCH 5/5] genetlink: mark families as __ro_after_init
2016-10-24 12:40 [PATCH 0/5] genetlink improvements Johannes Berg
` (3 preceding siblings ...)
2016-10-24 12:40 ` [PATCH 4/5] genetlink: use idr to track families Johannes Berg
@ 2016-10-24 12:40 ` Johannes Berg
2016-10-27 20:16 ` [PATCH 0/5] genetlink improvements David Miller
2016-11-01 17:28 ` new kmemleak reports (was: Re: [PATCH 0/5] genetlink improvements) Jakub Kicinski
6 siblings, 0 replies; 22+ messages in thread
From: Johannes Berg @ 2016-10-24 12:40 UTC (permalink / raw)
To: netdev; +Cc: Johannes Berg
From: Johannes Berg <johannes.berg@intel.com>
Now genl_register_family() is the only thing (other than the
users themselves, perhaps, but I didn't find any doing that)
writing to the family struct.
In all families that I found, genl_register_family() is only
called from __init functions (some indirectly, in which case
I've add __init annotations to clarifly things), so all can
actually be marked __ro_after_init.
This protects the data structure from accidental corruption.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
---
I can split this patch up and send it to all the owners of
the code later, if you prefer.
---
drivers/acpi/event.c | 4 ++--
drivers/net/gtp.c | 2 +-
drivers/net/macsec.c | 2 +-
drivers/net/team/team.c | 4 ++--
drivers/net/wireless/mac80211_hwsim.c | 4 ++--
drivers/scsi/pmcraid.c | 4 ++--
drivers/target/target_core_user.c | 2 +-
drivers/thermal/thermal_core.c | 4 ++--
fs/dlm/netlink.c | 2 +-
fs/quota/netlink.c | 2 +-
include/linux/genl_magic_func.h | 2 +-
kernel/taskstats.c | 2 +-
net/batman-adv/netlink.c | 2 +-
net/core/devlink.c | 2 +-
net/core/drop_monitor.c | 2 +-
net/hsr/hsr_netlink.c | 2 +-
net/ieee802154/netlink.c | 2 +-
net/ieee802154/nl802154.c | 4 ++--
net/ipv4/fou.c | 2 +-
net/ipv4/tcp_metrics.c | 2 +-
net/ipv6/ila/ila_xlat.c | 4 ++--
net/irda/irnetlink.c | 4 ++--
net/l2tp/l2tp_netlink.c | 4 ++--
net/netfilter/ipvs/ip_vs_ctl.c | 2 +-
net/netlabel/netlabel_calipso.c | 2 +-
net/netlabel/netlabel_cipso_v4.c | 2 +-
net/netlabel/netlabel_mgmt.c | 2 +-
net/netlabel/netlabel_unlabeled.c | 2 +-
net/netlink/genetlink.c | 2 +-
net/nfc/netlink.c | 2 +-
net/openvswitch/datapath.c | 10 +++++-----
net/tipc/netlink.c | 4 ++--
net/tipc/netlink_compat.c | 4 ++--
net/wimax/stack.c | 2 +-
net/wireless/nl80211.c | 4 ++--
35 files changed, 51 insertions(+), 51 deletions(-)
diff --git a/drivers/acpi/event.c b/drivers/acpi/event.c
index 1ab12ad7d5ba..7fceb3b4691b 100644
--- a/drivers/acpi/event.c
+++ b/drivers/acpi/event.c
@@ -82,7 +82,7 @@ static const struct genl_multicast_group acpi_event_mcgrps[] = {
{ .name = ACPI_GENL_MCAST_GROUP_NAME, },
};
-static struct genl_family acpi_event_genl_family = {
+static struct genl_family acpi_event_genl_family __ro_after_init = {
.module = THIS_MODULE,
.name = ACPI_GENL_FAMILY_NAME,
.version = ACPI_GENL_VERSION,
@@ -144,7 +144,7 @@ int acpi_bus_generate_netlink_event(const char *device_class,
EXPORT_SYMBOL(acpi_bus_generate_netlink_event);
-static int acpi_event_genetlink_init(void)
+static int __init acpi_event_genetlink_init(void)
{
return genl_register_family(&acpi_event_genl_family);
}
diff --git a/drivers/net/gtp.c b/drivers/net/gtp.c
index 0604fd78f826..719d19f35673 100644
--- a/drivers/net/gtp.c
+++ b/drivers/net/gtp.c
@@ -1290,7 +1290,7 @@ static const struct genl_ops gtp_genl_ops[] = {
},
};
-static struct genl_family gtp_genl_family = {
+static struct genl_family gtp_genl_family __ro_after_init = {
.name = "gtp",
.version = 0,
.hdrsize = 0,
diff --git a/drivers/net/macsec.c b/drivers/net/macsec.c
index 63ca7a3c77cf..0a715ab9d9cc 100644
--- a/drivers/net/macsec.c
+++ b/drivers/net/macsec.c
@@ -2648,7 +2648,7 @@ static const struct genl_ops macsec_genl_ops[] = {
},
};
-static struct genl_family macsec_fam = {
+static struct genl_family macsec_fam __ro_after_init = {
.name = MACSEC_GENL_NAME,
.hdrsize = 0,
.version = MACSEC_GENL_VERSION,
diff --git a/drivers/net/team/team.c b/drivers/net/team/team.c
index 46bf7c1216c0..bdc58567d10e 100644
--- a/drivers/net/team/team.c
+++ b/drivers/net/team/team.c
@@ -2740,7 +2740,7 @@ static const struct genl_multicast_group team_nl_mcgrps[] = {
{ .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME, },
};
-static struct genl_family team_nl_family = {
+static struct genl_family team_nl_family __ro_after_init = {
.name = TEAM_GENL_NAME,
.version = TEAM_GENL_VERSION,
.maxattr = TEAM_ATTR_MAX,
@@ -2773,7 +2773,7 @@ static int team_nl_send_event_port_get(struct team *team,
port);
}
-static int team_nl_init(void)
+static int __init team_nl_init(void)
{
return genl_register_family(&team_nl_family);
}
diff --git a/drivers/net/wireless/mac80211_hwsim.c b/drivers/net/wireless/mac80211_hwsim.c
index 5d4637e586e8..220e9dc8ccf8 100644
--- a/drivers/net/wireless/mac80211_hwsim.c
+++ b/drivers/net/wireless/mac80211_hwsim.c
@@ -3228,7 +3228,7 @@ static const struct genl_ops hwsim_ops[] = {
},
};
-static struct genl_family hwsim_genl_family = {
+static struct genl_family hwsim_genl_family __ro_after_init = {
.name = "MAC80211_HWSIM",
.version = 1,
.maxattr = HWSIM_ATTR_MAX,
@@ -3287,7 +3287,7 @@ static struct notifier_block hwsim_netlink_notifier = {
.notifier_call = mac80211_hwsim_netlink_notify,
};
-static int hwsim_init_netlink(void)
+static int __init hwsim_init_netlink(void)
{
int rc;
diff --git a/drivers/scsi/pmcraid.c b/drivers/scsi/pmcraid.c
index c0ab7bb8c3ce..845affa112f7 100644
--- a/drivers/scsi/pmcraid.c
+++ b/drivers/scsi/pmcraid.c
@@ -1368,7 +1368,7 @@ static struct genl_multicast_group pmcraid_mcgrps[] = {
{ .name = "events", /* not really used - see ID discussion below */ },
};
-static struct genl_family pmcraid_event_family = {
+static struct genl_family pmcraid_event_family __ro_after_init = {
.module = THIS_MODULE,
.name = "pmcraid",
.version = 1,
@@ -1384,7 +1384,7 @@ static struct genl_family pmcraid_event_family = {
* 0 if the pmcraid_event_family is successfully registered
* with netlink generic, non-zero otherwise
*/
-static int pmcraid_netlink_init(void)
+static int __init pmcraid_netlink_init(void)
{
int result;
diff --git a/drivers/target/target_core_user.c b/drivers/target/target_core_user.c
index 3483372f5562..0f173bf7dbac 100644
--- a/drivers/target/target_core_user.c
+++ b/drivers/target/target_core_user.c
@@ -147,7 +147,7 @@ static const struct genl_multicast_group tcmu_mcgrps[] = {
};
/* Our generic netlink family */
-static struct genl_family tcmu_genl_family = {
+static struct genl_family tcmu_genl_family __ro_after_init = {
.module = THIS_MODULE,
.hdrsize = 0,
.name = "TCM-USER",
diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c
index 93b6caab2d9f..911fd964c742 100644
--- a/drivers/thermal/thermal_core.c
+++ b/drivers/thermal/thermal_core.c
@@ -2163,7 +2163,7 @@ static const struct genl_multicast_group thermal_event_mcgrps[] = {
{ .name = THERMAL_GENL_MCAST_GROUP_NAME, },
};
-static struct genl_family thermal_event_genl_family = {
+static struct genl_family thermal_event_genl_family __ro_after_init = {
.module = THIS_MODULE,
.name = THERMAL_GENL_FAMILY_NAME,
.version = THERMAL_GENL_VERSION,
@@ -2235,7 +2235,7 @@ int thermal_generate_netlink_event(struct thermal_zone_device *tz,
}
EXPORT_SYMBOL_GPL(thermal_generate_netlink_event);
-static int genetlink_init(void)
+static int __init genetlink_init(void)
{
return genl_register_family(&thermal_event_genl_family);
}
diff --git a/fs/dlm/netlink.c b/fs/dlm/netlink.c
index 04042d69573c..0643ae44f342 100644
--- a/fs/dlm/netlink.c
+++ b/fs/dlm/netlink.c
@@ -72,7 +72,7 @@ static struct genl_ops dlm_nl_ops[] = {
},
};
-static struct genl_family family = {
+static struct genl_family family __ro_after_init = {
.name = DLM_GENL_NAME,
.version = DLM_GENL_VERSION,
.ops = dlm_nl_ops,
diff --git a/fs/quota/netlink.c b/fs/quota/netlink.c
index 9457c7b0dfa2..e99b1a72d9a7 100644
--- a/fs/quota/netlink.c
+++ b/fs/quota/netlink.c
@@ -12,7 +12,7 @@ static const struct genl_multicast_group quota_mcgrps[] = {
};
/* Netlink family structure for quota */
-static struct genl_family quota_genl_family = {
+static struct genl_family quota_genl_family __ro_after_init = {
.module = THIS_MODULE,
.hdrsize = 0,
.name = "VFS_DQUOT",
diff --git a/include/linux/genl_magic_func.h b/include/linux/genl_magic_func.h
index 40c2e39362c8..377257d8f7e3 100644
--- a/include/linux/genl_magic_func.h
+++ b/include/linux/genl_magic_func.h
@@ -293,7 +293,7 @@ static int CONCAT_(GENL_MAGIC_FAMILY, _genl_multicast_ ## group)( \
#undef GENL_mc_group
#define GENL_mc_group(group)
-static struct genl_family ZZZ_genl_family __read_mostly = {
+static struct genl_family ZZZ_genl_family __ro_after_init = {
.name = __stringify(GENL_MAGIC_FAMILY),
.version = GENL_MAGIC_VERSION,
#ifdef GENL_MAGIC_FAMILY_HDRSZ
diff --git a/kernel/taskstats.c b/kernel/taskstats.c
index 4075ece592f2..9b7f838511ce 100644
--- a/kernel/taskstats.c
+++ b/kernel/taskstats.c
@@ -646,7 +646,7 @@ static const struct genl_ops taskstats_ops[] = {
},
};
-static struct genl_family family = {
+static struct genl_family family __ro_after_init = {
.name = TASKSTATS_GENL_NAME,
.version = TASKSTATS_GENL_VERSION,
.maxattr = TASKSTATS_CMD_ATTR_MAX,
diff --git a/net/batman-adv/netlink.c b/net/batman-adv/netlink.c
index e28cec34a016..005012ba9b48 100644
--- a/net/batman-adv/netlink.c
+++ b/net/batman-adv/netlink.c
@@ -603,7 +603,7 @@ static struct genl_ops batadv_netlink_ops[] = {
};
-struct genl_family batadv_netlink_family = {
+struct genl_family batadv_netlink_family __ro_after_init = {
.hdrsize = 0,
.name = BATADV_NL_NAME,
.version = 1,
diff --git a/net/core/devlink.c b/net/core/devlink.c
index 6f01d41b1851..3a90b5005839 100644
--- a/net/core/devlink.c
+++ b/net/core/devlink.c
@@ -1610,7 +1610,7 @@ static const struct genl_ops devlink_nl_ops[] = {
},
};
-static struct genl_family devlink_nl_family = {
+static struct genl_family devlink_nl_family __ro_after_init = {
.name = DEVLINK_GENL_NAME,
.version = DEVLINK_GENL_VERSION,
.maxattr = DEVLINK_ATTR_MAX,
diff --git a/net/core/drop_monitor.c b/net/core/drop_monitor.c
index 80c002794ff6..8e0c0635ee97 100644
--- a/net/core/drop_monitor.c
+++ b/net/core/drop_monitor.c
@@ -346,7 +346,7 @@ static const struct genl_ops dropmon_ops[] = {
},
};
-static struct genl_family net_drop_monitor_family = {
+static struct genl_family net_drop_monitor_family __ro_after_init = {
.hdrsize = 0,
.name = "NET_DM",
.version = 2,
diff --git a/net/hsr/hsr_netlink.c b/net/hsr/hsr_netlink.c
index aab34c7f6f89..1ab30e7d3f99 100644
--- a/net/hsr/hsr_netlink.c
+++ b/net/hsr/hsr_netlink.c
@@ -461,7 +461,7 @@ static const struct genl_ops hsr_ops[] = {
},
};
-static struct genl_family hsr_genl_family = {
+static struct genl_family hsr_genl_family __ro_after_init = {
.hdrsize = 0,
.name = "HSR",
.version = 1,
diff --git a/net/ieee802154/netlink.c b/net/ieee802154/netlink.c
index 08e62470bac2..6bde9e5a5503 100644
--- a/net/ieee802154/netlink.c
+++ b/net/ieee802154/netlink.c
@@ -131,7 +131,7 @@ static const struct genl_multicast_group ieee802154_mcgrps[] = {
[IEEE802154_BEACON_MCGRP] = { .name = IEEE802154_MCAST_BEACON_NAME, },
};
-struct genl_family nl802154_family = {
+struct genl_family nl802154_family __ro_after_init = {
.hdrsize = 0,
.name = IEEE802154_NL_NAME,
.version = 1,
diff --git a/net/ieee802154/nl802154.c b/net/ieee802154/nl802154.c
index f7e75578aedd..fc60cd061f39 100644
--- a/net/ieee802154/nl802154.c
+++ b/net/ieee802154/nl802154.c
@@ -2462,7 +2462,7 @@ static const struct genl_ops nl802154_ops[] = {
#endif /* CONFIG_IEEE802154_NL802154_EXPERIMENTAL */
};
-static struct genl_family nl802154_fam = {
+static struct genl_family nl802154_fam __ro_after_init = {
.name = NL802154_GENL_NAME, /* have users key off the name instead */
.hdrsize = 0, /* no private header */
.version = 1, /* no particular meaning now */
@@ -2478,7 +2478,7 @@ static struct genl_family nl802154_fam = {
};
/* initialisation/exit functions */
-int nl802154_init(void)
+int __init nl802154_init(void)
{
return genl_register_family(&nl802154_fam);
}
diff --git a/net/ipv4/fou.c b/net/ipv4/fou.c
index 5b5226a2434f..6cb57bb8692d 100644
--- a/net/ipv4/fou.c
+++ b/net/ipv4/fou.c
@@ -824,7 +824,7 @@ static const struct genl_ops fou_nl_ops[] = {
},
};
-static struct genl_family fou_nl_family = {
+static struct genl_family fou_nl_family __ro_after_init = {
.hdrsize = 0,
.name = FOU_GENL_NAME,
.version = FOU_GENL_VERSION,
diff --git a/net/ipv4/tcp_metrics.c b/net/ipv4/tcp_metrics.c
index bba3c72c4a39..d46f4d5b1c62 100644
--- a/net/ipv4/tcp_metrics.c
+++ b/net/ipv4/tcp_metrics.c
@@ -1109,7 +1109,7 @@ static const struct genl_ops tcp_metrics_nl_ops[] = {
},
};
-static struct genl_family tcp_metrics_nl_family = {
+static struct genl_family tcp_metrics_nl_family __ro_after_init = {
.hdrsize = 0,
.name = TCP_METRICS_GENL_NAME,
.version = TCP_METRICS_GENL_VERSION,
diff --git a/net/ipv6/ila/ila_xlat.c b/net/ipv6/ila/ila_xlat.c
index 97f7b0cc4675..628ae6d85b59 100644
--- a/net/ipv6/ila/ila_xlat.c
+++ b/net/ipv6/ila/ila_xlat.c
@@ -553,7 +553,7 @@ static const struct genl_ops ila_nl_ops[] = {
},
};
-static struct genl_family ila_nl_family = {
+static struct genl_family ila_nl_family __ro_after_init = {
.hdrsize = 0,
.name = ILA_GENL_NAME,
.version = ILA_GENL_VERSION,
@@ -627,7 +627,7 @@ static int ila_xlat_addr(struct sk_buff *skb, bool set_csum_neutral)
return 0;
}
-int ila_xlat_init(void)
+int __init ila_xlat_init(void)
{
int ret;
diff --git a/net/irda/irnetlink.c b/net/irda/irnetlink.c
index 07877347c2f7..7fc340e574cf 100644
--- a/net/irda/irnetlink.c
+++ b/net/irda/irnetlink.c
@@ -141,7 +141,7 @@ static const struct genl_ops irda_nl_ops[] = {
};
-static struct genl_family irda_nl_family = {
+static struct genl_family irda_nl_family __ro_after_init = {
.name = IRDA_NL_NAME,
.hdrsize = 0,
.version = IRDA_NL_VERSION,
@@ -151,7 +151,7 @@ static struct genl_family irda_nl_family = {
.n_ops = ARRAY_SIZE(irda_nl_ops),
};
-int irda_nl_register(void)
+int __init irda_nl_register(void)
{
return genl_register_family(&irda_nl_family);
}
diff --git a/net/l2tp/l2tp_netlink.c b/net/l2tp/l2tp_netlink.c
index e4e8c0769a6b..59aa2d204e4a 100644
--- a/net/l2tp/l2tp_netlink.c
+++ b/net/l2tp/l2tp_netlink.c
@@ -970,7 +970,7 @@ static const struct genl_ops l2tp_nl_ops[] = {
},
};
-static struct genl_family l2tp_nl_family = {
+static struct genl_family l2tp_nl_family __ro_after_init = {
.name = L2TP_GENL_NAME,
.version = L2TP_GENL_VERSION,
.hdrsize = 0,
@@ -1016,7 +1016,7 @@ void l2tp_nl_unregister_ops(enum l2tp_pwtype pw_type)
}
EXPORT_SYMBOL_GPL(l2tp_nl_unregister_ops);
-static int l2tp_nl_init(void)
+static int __init l2tp_nl_init(void)
{
pr_info("L2TP netlink interface\n");
return genl_register_family(&l2tp_nl_family);
diff --git a/net/netfilter/ipvs/ip_vs_ctl.c b/net/netfilter/ipvs/ip_vs_ctl.c
index ea3e8aed063f..6b85ded4f91d 100644
--- a/net/netfilter/ipvs/ip_vs_ctl.c
+++ b/net/netfilter/ipvs/ip_vs_ctl.c
@@ -3865,7 +3865,7 @@ static const struct genl_ops ip_vs_genl_ops[] = {
},
};
-static struct genl_family ip_vs_genl_family = {
+static struct genl_family ip_vs_genl_family __ro_after_init = {
.hdrsize = 0,
.name = IPVS_GENL_NAME,
.version = IPVS_GENL_VERSION,
diff --git a/net/netlabel/netlabel_calipso.c b/net/netlabel/netlabel_calipso.c
index ca7c9c411a5c..d177dd066504 100644
--- a/net/netlabel/netlabel_calipso.c
+++ b/net/netlabel/netlabel_calipso.c
@@ -349,7 +349,7 @@ static const struct genl_ops netlbl_calipso_ops[] = {
},
};
-static struct genl_family netlbl_calipso_gnl_family = {
+static struct genl_family netlbl_calipso_gnl_family __ro_after_init = {
.hdrsize = 0,
.name = NETLBL_NLTYPE_CALIPSO_NAME,
.version = NETLBL_PROTO_VERSION,
diff --git a/net/netlabel/netlabel_cipso_v4.c b/net/netlabel/netlabel_cipso_v4.c
index a665eae91245..4149d3e63589 100644
--- a/net/netlabel/netlabel_cipso_v4.c
+++ b/net/netlabel/netlabel_cipso_v4.c
@@ -760,7 +760,7 @@ static const struct genl_ops netlbl_cipsov4_ops[] = {
},
};
-static struct genl_family netlbl_cipsov4_gnl_family = {
+static struct genl_family netlbl_cipsov4_gnl_family __ro_after_init = {
.hdrsize = 0,
.name = NETLBL_NLTYPE_CIPSOV4_NAME,
.version = NETLBL_PROTO_VERSION,
diff --git a/net/netlabel/netlabel_mgmt.c b/net/netlabel/netlabel_mgmt.c
index ecfe8eb149db..21e0095b1d14 100644
--- a/net/netlabel/netlabel_mgmt.c
+++ b/net/netlabel/netlabel_mgmt.c
@@ -828,7 +828,7 @@ static const struct genl_ops netlbl_mgmt_genl_ops[] = {
},
};
-static struct genl_family netlbl_mgmt_gnl_family = {
+static struct genl_family netlbl_mgmt_gnl_family __ro_after_init = {
.hdrsize = 0,
.name = NETLBL_NLTYPE_MGMT_NAME,
.version = NETLBL_PROTO_VERSION,
diff --git a/net/netlabel/netlabel_unlabeled.c b/net/netlabel/netlabel_unlabeled.c
index 5dbbad41114f..22dc1b9d6362 100644
--- a/net/netlabel/netlabel_unlabeled.c
+++ b/net/netlabel/netlabel_unlabeled.c
@@ -1372,7 +1372,7 @@ static const struct genl_ops netlbl_unlabel_genl_ops[] = {
},
};
-static struct genl_family netlbl_unlabel_gnl_family = {
+static struct genl_family netlbl_unlabel_gnl_family __ro_after_init = {
.hdrsize = 0,
.name = NETLBL_NLTYPE_UNLABELED_NAME,
.version = NETLBL_PROTO_VERSION,
diff --git a/net/netlink/genetlink.c b/net/netlink/genetlink.c
index 85659921e7b2..df0cbcddda2c 100644
--- a/net/netlink/genetlink.c
+++ b/net/netlink/genetlink.c
@@ -936,7 +936,7 @@ static const struct genl_multicast_group genl_ctrl_groups[] = {
{ .name = "notify", },
};
-static struct genl_family genl_ctrl = {
+static struct genl_family genl_ctrl __ro_after_init = {
.module = THIS_MODULE,
.ops = genl_ctrl_ops,
.n_ops = ARRAY_SIZE(genl_ctrl_ops),
diff --git a/net/nfc/netlink.c b/net/nfc/netlink.c
index 450b1e5144cc..03f3d5c7beb8 100644
--- a/net/nfc/netlink.c
+++ b/net/nfc/netlink.c
@@ -1746,7 +1746,7 @@ static const struct genl_ops nfc_genl_ops[] = {
},
};
-static struct genl_family nfc_genl_family = {
+static struct genl_family nfc_genl_family __ro_after_init = {
.hdrsize = 0,
.name = NFC_GENL_NAME,
.version = NFC_GENL_VERSION,
diff --git a/net/openvswitch/datapath.c b/net/openvswitch/datapath.c
index ad6a111a0014..fa8760176b7d 100644
--- a/net/openvswitch/datapath.c
+++ b/net/openvswitch/datapath.c
@@ -670,7 +670,7 @@ static const struct genl_ops dp_packet_genl_ops[] = {
}
};
-static struct genl_family dp_packet_genl_family = {
+static struct genl_family dp_packet_genl_family __ro_after_init = {
.hdrsize = sizeof(struct ovs_header),
.name = OVS_PACKET_FAMILY,
.version = OVS_PACKET_VERSION,
@@ -1435,7 +1435,7 @@ static const struct genl_ops dp_flow_genl_ops[] = {
},
};
-static struct genl_family dp_flow_genl_family = {
+static struct genl_family dp_flow_genl_family __ro_after_init = {
.hdrsize = sizeof(struct ovs_header),
.name = OVS_FLOW_FAMILY,
.version = OVS_FLOW_VERSION,
@@ -1821,7 +1821,7 @@ static const struct genl_ops dp_datapath_genl_ops[] = {
},
};
-static struct genl_family dp_datapath_genl_family = {
+static struct genl_family dp_datapath_genl_family __ro_after_init = {
.hdrsize = sizeof(struct ovs_header),
.name = OVS_DATAPATH_FAMILY,
.version = OVS_DATAPATH_VERSION,
@@ -2243,7 +2243,7 @@ static const struct genl_ops dp_vport_genl_ops[] = {
},
};
-struct genl_family dp_vport_genl_family = {
+struct genl_family dp_vport_genl_family __ro_after_init = {
.hdrsize = sizeof(struct ovs_header),
.name = OVS_VPORT_FAMILY,
.version = OVS_VPORT_VERSION,
@@ -2272,7 +2272,7 @@ static void dp_unregister_genl(int n_families)
genl_unregister_family(dp_genl_families[i]);
}
-static int dp_register_genl(void)
+static int __init dp_register_genl(void)
{
int err;
int i;
diff --git a/net/tipc/netlink.c b/net/tipc/netlink.c
index 74a405bf107b..26ca8dd64ded 100644
--- a/net/tipc/netlink.c
+++ b/net/tipc/netlink.c
@@ -249,7 +249,7 @@ static const struct genl_ops tipc_genl_v2_ops[] = {
#endif
};
-struct genl_family tipc_genl_family = {
+struct genl_family tipc_genl_family __ro_after_init = {
.name = TIPC_GENL_V2_NAME,
.version = TIPC_GENL_V2_VERSION,
.hdrsize = 0,
@@ -271,7 +271,7 @@ int tipc_nlmsg_parse(const struct nlmsghdr *nlh, struct nlattr ***attr)
return nlmsg_parse(nlh, GENL_HDRLEN, *attr, maxattr, tipc_nl_policy);
}
-int tipc_netlink_start(void)
+int __init tipc_netlink_start(void)
{
int res;
diff --git a/net/tipc/netlink_compat.c b/net/tipc/netlink_compat.c
index 07b19931e458..e1ae8a8a2b8e 100644
--- a/net/tipc/netlink_compat.c
+++ b/net/tipc/netlink_compat.c
@@ -1222,7 +1222,7 @@ static struct genl_ops tipc_genl_compat_ops[] = {
},
};
-static struct genl_family tipc_genl_compat_family = {
+static struct genl_family tipc_genl_compat_family __ro_after_init = {
.name = TIPC_GENL_NAME,
.version = TIPC_GENL_VERSION,
.hdrsize = TIPC_GENL_HDRLEN,
@@ -1233,7 +1233,7 @@ static struct genl_family tipc_genl_compat_family = {
.n_ops = ARRAY_SIZE(tipc_genl_compat_ops),
};
-int tipc_netlink_compat_start(void)
+int __init tipc_netlink_compat_start(void)
{
int res;
diff --git a/net/wimax/stack.c b/net/wimax/stack.c
index 587e1627681f..5db731512014 100644
--- a/net/wimax/stack.c
+++ b/net/wimax/stack.c
@@ -576,7 +576,7 @@ static const struct genl_multicast_group wimax_gnl_mcgrps[] = {
{ .name = "msg", },
};
-struct genl_family wimax_gnl_family = {
+struct genl_family wimax_gnl_family __ro_after_init = {
.name = "WiMAX",
.version = WIMAX_GNL_VERSION,
.hdrsize = 0,
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index 8e5ca3c47593..271707dacfea 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -12586,7 +12586,7 @@ static const struct genl_ops nl80211_ops[] = {
},
};
-static struct genl_family nl80211_fam = {
+static struct genl_family nl80211_fam __ro_after_init = {
.name = NL80211_GENL_NAME, /* have users key off the name instead */
.hdrsize = 0, /* no private header */
.version = 1, /* no particular meaning now */
@@ -14563,7 +14563,7 @@ void nl80211_send_ap_stopped(struct wireless_dev *wdev)
/* initialisation/exit functions */
-int nl80211_init(void)
+int __init nl80211_init(void)
{
int err;
--
2.8.1
^ permalink raw reply related [flat|nested] 22+ messages in thread
* Re: [PATCH 3/5] genetlink: statically initialize families
2016-10-24 12:40 ` [PATCH 3/5] genetlink: statically initialize families Johannes Berg
@ 2016-10-24 12:55 ` Johannes Berg
2016-10-25 11:25 ` David Laight
0 siblings, 1 reply; 22+ messages in thread
From: Johannes Berg @ 2016-10-24 12:55 UTC (permalink / raw)
To: netdev
On Mon, 2016-10-24 at 14:40 +0200, Johannes Berg wrote:
> From: Johannes Berg <johannes.berg@intel.com>
>
> Instead of providing macros/inline functions to initialize
> the families, make all users initialize them statically and
> get rid of the macros.
>
> This reduces the kernel code size by about 1.6k on x86-64
> (with allyesconfig).
Actually, with the new system where it's not const, I could even split
this up and submit per subsystem, i.e. the fourth patch doesn't depend
on it. I thought it would, since I wanted to make it const, but since I
failed it doesn't actually have that dependency.
johannes
^ permalink raw reply [flat|nested] 22+ messages in thread
* RE: [PATCH 3/5] genetlink: statically initialize families
2016-10-24 12:55 ` Johannes Berg
@ 2016-10-25 11:25 ` David Laight
2016-10-25 11:38 ` Johannes Berg
0 siblings, 1 reply; 22+ messages in thread
From: David Laight @ 2016-10-25 11:25 UTC (permalink / raw)
To: 'Johannes Berg', netdev
From: Johannes Berg
> Sent: 24 October 2016 13:56
> On Mon, 2016-10-24 at 14:40 +0200, Johannes Berg wrote:
> > From: Johannes Berg <johannes.berg@intel.com>
> >
> > Instead of providing macros/inline functions to initialize
> > the families, make all users initialize them statically and
> > get rid of the macros.
> >
> > This reduces the kernel code size by about 1.6k on x86-64
> > (with allyesconfig).
>
> Actually, with the new system where it's not const, I could even split
> this up and submit per subsystem, i.e. the fourth patch doesn't depend
> on it. I thought it would, since I wanted to make it const, but since I
> failed it doesn't actually have that dependency.
Actually, why aren't the structures 'const' ?
You could use a #define to set the .ops and .n_ops fields.
(and maybe .module = THIS_MODULE as well).
David
^ permalink raw reply [flat|nested] 22+ messages in thread
* Re: [PATCH 3/5] genetlink: statically initialize families
2016-10-25 11:25 ` David Laight
@ 2016-10-25 11:38 ` Johannes Berg
0 siblings, 0 replies; 22+ messages in thread
From: Johannes Berg @ 2016-10-25 11:38 UTC (permalink / raw)
To: David Laight, netdev
On Tue, 2016-10-25 at 11:25 +0000, David Laight wrote:
> > Actually, with the new system where it's not const, I could even
> > split this up and submit per subsystem, i.e. the fourth patch
> > doesn't depend on it. I thought it would, since I wanted to make it
> > const, but since I failed it doesn't actually have that dependency.
>
> Actually, why aren't the structures 'const' ?
>
> You could use a #define to set the .ops and .n_ops fields.
> (and maybe .module = THIS_MODULE as well).
This stuff isn't the problem - after this patch these are of course
statically initialized and const.
The problem is that the struct members family->id, family->mcgrp_offset
and family->attrbuf, are only determined at genl_register_family().
I considered simply moving them into a new struct, that contains just
those along with a pointer to the family, but then I have essentially
two choices:
1) look up the registration struct by the family every time I need the
family ID, which is all the time; that would be rather inefficient
2) change *all* genetlink code to not pass the family but rather pass a
pointer returned by genl_register_family(); that's a massive change
So on the whole, I decided that __ro_after_init was entirely reasonable
and then even this patch isn't really necessary, but since I had it
anyway it still seemed to make sense, even if I had to add all those
forward declarations.
johannes
^ permalink raw reply [flat|nested] 22+ messages in thread
* Re: [PATCH 0/5] genetlink improvements
2016-10-24 12:40 [PATCH 0/5] genetlink improvements Johannes Berg
` (4 preceding siblings ...)
2016-10-24 12:40 ` [PATCH 5/5] genetlink: mark families as __ro_after_init Johannes Berg
@ 2016-10-27 20:16 ` David Miller
2016-11-01 17:28 ` new kmemleak reports (was: Re: [PATCH 0/5] genetlink improvements) Jakub Kicinski
6 siblings, 0 replies; 22+ messages in thread
From: David Miller @ 2016-10-27 20:16 UTC (permalink / raw)
To: johannes; +Cc: netdev
From: Johannes Berg <johannes@sipsolutions.net>
Date: Mon, 24 Oct 2016 14:40:00 +0200
> This series contains some generic netlink improvements, making
> the API safer to use, and making the function pointers in the
> family struct safer by allowing it to be __ro_after_init.
Looks great, series applied, thanks!
^ permalink raw reply [flat|nested] 22+ messages in thread
* new kmemleak reports (was: Re: [PATCH 0/5] genetlink improvements)
2016-10-24 12:40 [PATCH 0/5] genetlink improvements Johannes Berg
` (5 preceding siblings ...)
2016-10-27 20:16 ` [PATCH 0/5] genetlink improvements David Miller
@ 2016-11-01 17:28 ` Jakub Kicinski
2016-11-01 18:32 ` Cong Wang
6 siblings, 1 reply; 22+ messages in thread
From: Jakub Kicinski @ 2016-11-01 17:28 UTC (permalink / raw)
To: Johannes Berg, Dmitry Torokhov, Maciej Żenczykowski; +Cc: netdev
Hi Johannes!
Could these be related to your set? Perhaps some annotation missing? :)
They are present on net-next but not on 4fe77d82ef80 ("skbedit: allow
the user to specify bitmask for mark").
unreferenced object 0xffff8807396a0348 (size 64):
comm "swapper/0", pid 1, jiffies 4294898458 (age 781.352s)
hex dump (first 32 bytes):
6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
backtrace:
[<ffffffff85decad8>] kmemleak_alloc+0x28/0x50
[<ffffffff84771246>] __kmalloc+0x206/0x5a0
[<ffffffff859e1261>] genl_register_family+0x711/0x11d0
[<ffffffff888d0ecf>] genl_init+0x11/0x43
[<ffffffff840022b7>] do_one_initcall+0xb7/0x2a0
[<ffffffff887f9102>] kernel_init_freeable+0x597/0x636
[<ffffffff85de7793>] kernel_init+0x13/0x140
[<ffffffff85e0246a>] ret_from_fork+0x2a/0x40
[<ffffffffffffffff>] 0xffffffffffffffff
unreferenced object 0xffff8807389cba28 (size 128):
comm "swapper/0", pid 1, jiffies 4294898463 (age 781.332s)
hex dump (first 32 bytes):
6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
backtrace:
[<ffffffff85decad8>] kmemleak_alloc+0x28/0x50
[<ffffffff84771246>] __kmalloc+0x206/0x5a0
[<ffffffff859e1261>] genl_register_family+0x711/0x11d0
[<ffffffff888d9524>] netlbl_mgmt_genl_init+0x10/0x12
[<ffffffff888d91e8>] netlbl_netlink_init+0x9/0x26
[<ffffffff888d9254>] netlbl_init+0x4f/0x85
[<ffffffff840022b7>] do_one_initcall+0xb7/0x2a0
[<ffffffff887f9102>] kernel_init_freeable+0x597/0x636
[<ffffffff85de7793>] kernel_init+0x13/0x140
[<ffffffff85e0246a>] ret_from_fork+0x2a/0x40
[<ffffffffffffffff>] 0xffffffffffffffff
unreferenced object 0xffff8807389c8f08 (size 128):
comm "swapper/0", pid 1, jiffies 4294898463 (age 781.332s)
hex dump (first 32 bytes):
6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
backtrace:
[<ffffffff85decad8>] kmemleak_alloc+0x28/0x50
[<ffffffff84771246>] __kmalloc+0x206/0x5a0
[<ffffffff859e1261>] genl_register_family+0x711/0x11d0
[<ffffffff888d992f>] netlbl_cipsov4_genl_init+0x10/0x12
[<ffffffff888d91f1>] netlbl_netlink_init+0x12/0x26
[<ffffffff888d9254>] netlbl_init+0x4f/0x85
[<ffffffff840022b7>] do_one_initcall+0xb7/0x2a0
[<ffffffff887f9102>] kernel_init_freeable+0x597/0x636
[<ffffffff85de7793>] kernel_init+0x13/0x140
[<ffffffff85e0246a>] ret_from_fork+0x2a/0x40
[<ffffffffffffffff>] 0xffffffffffffffff
unreferenced object 0xffff88072dd23b08 (size 32):
comm "swapper/0", pid 1, jiffies 4294898463 (age 781.348s)
hex dump (first 32 bytes):
6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b a5 kkkkkkkkkkkkkkk.
backtrace:
[<ffffffff85decad8>] kmemleak_alloc+0x28/0x50
[<ffffffff84771246>] __kmalloc+0x206/0x5a0
[<ffffffff859e1261>] genl_register_family+0x711/0x11d0
[<ffffffff888d9941>] netlbl_calipso_genl_init+0x10/0x12
[<ffffffff888d91fa>] netlbl_netlink_init+0x1b/0x26
[<ffffffff888d9254>] netlbl_init+0x4f/0x85
[<ffffffff840022b7>] do_one_initcall+0xb7/0x2a0
[<ffffffff887f9102>] kernel_init_freeable+0x597/0x636
[<ffffffff85de7793>] kernel_init+0x13/0x140
[<ffffffff85e0246a>] ret_from_fork+0x2a/0x40
[<ffffffffffffffff>] 0xffffffffffffffff
unreferenced object 0xffff8807396a0828 (size 64):
comm "swapper/0", pid 1, jiffies 4294898463 (age 781.348s)
hex dump (first 32 bytes):
6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
backtrace:
[<ffffffff85decad8>] kmemleak_alloc+0x28/0x50
[<ffffffff84771246>] __kmalloc+0x206/0x5a0
[<ffffffff859e1261>] genl_register_family+0x711/0x11d0
[<ffffffff888d9536>] netlbl_unlabel_genl_init+0x10/0x12
[<ffffffff888d9203>] netlbl_netlink_init+0x24/0x26
[<ffffffff888d9254>] netlbl_init+0x4f/0x85
[<ffffffff840022b7>] do_one_initcall+0xb7/0x2a0
[<ffffffff887f9102>] kernel_init_freeable+0x597/0x636
[<ffffffff85de7793>] kernel_init+0x13/0x140
[<ffffffff85e0246a>] ret_from_fork+0x2a/0x40
[<ffffffffffffffff>] 0xffffffffffffffff
unreferenced object 0xffff880711df5ba8 (size 64):
comm "swapper/0", pid 1, jiffies 4294898511 (age 781.160s)
hex dump (first 32 bytes):
6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
backtrace:
[<ffffffff85decad8>] kmemleak_alloc+0x28/0x50
[<ffffffff84771246>] __kmalloc+0x206/0x5a0
[<ffffffff859e1261>] genl_register_family+0x711/0x11d0
[<ffffffff88877dc4>] quota_init+0x10/0x24
[<ffffffff840022b7>] do_one_initcall+0xb7/0x2a0
[<ffffffff887f9102>] kernel_init_freeable+0x597/0x636
[<ffffffff85de7793>] kernel_init+0x13/0x140
[<ffffffff85e0246a>] ret_from_fork+0x2a/0x40
[<ffffffffffffffff>] 0xffffffffffffffff
unreferenced object 0xffff88072dc3e2e8 (size 16):
comm "swapper/0", pid 1, jiffies 4294898513 (age 781.152s)
hex dump (first 16 bytes):
6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b a5 kkkkkkkkkkkkkkk.
backtrace:
[<ffffffff85decad8>] kmemleak_alloc+0x28/0x50
[<ffffffff84771246>] __kmalloc+0x206/0x5a0
[<ffffffff859e1261>] genl_register_family+0x711/0x11d0
[<ffffffff88898d4f>] acpi_event_init+0x4a/0x5e
[<ffffffff840022b7>] do_one_initcall+0xb7/0x2a0
[<ffffffff887f9102>] kernel_init_freeable+0x597/0x636
[<ffffffff85de7793>] kernel_init+0x13/0x140
[<ffffffff85e0246a>] ret_from_fork+0x2a/0x40
[<ffffffffffffffff>] 0xffffffffffffffff
unreferenced object 0xffff880713975598 (size 16):
comm "swapper/0", pid 1, jiffies 4294898569 (age 780.932s)
hex dump (first 16 bytes):
6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b a5 kkkkkkkkkkkkkkk.
backtrace:
[<ffffffff85decad8>] kmemleak_alloc+0x28/0x50
[<ffffffff84771246>] __kmalloc+0x206/0x5a0
[<ffffffff859e1261>] genl_register_family+0x711/0x11d0
[<ffffffff888bd402>] thermal_init+0x4f/0xdf
[<ffffffff840022b7>] do_one_initcall+0xb7/0x2a0
[<ffffffff887f9102>] kernel_init_freeable+0x597/0x636
[<ffffffff85de7793>] kernel_init+0x13/0x140
[<ffffffff85e0246a>] ret_from_fork+0x2a/0x40
[<ffffffffffffffff>] 0xffffffffffffffff
unreferenced object 0xffff880715f52d08 (size 128):
comm "swapper/0", pid 1, jiffies 4294898660 (age 780.584s)
hex dump (first 32 bytes):
6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
backtrace:
[<ffffffff85decad8>] kmemleak_alloc+0x28/0x50
[<ffffffff84771246>] __kmalloc+0x206/0x5a0
[<ffffffff859e1261>] genl_register_family+0x711/0x11d0
[<ffffffff888d1e5e>] tcp_metrics_init+0x31/0x48
[<ffffffff888d1b89>] tcp_init+0x5af/0x5e1
[<ffffffff888d2747>] inet_init+0x216/0x34b
[<ffffffff840022b7>] do_one_initcall+0xb7/0x2a0
[<ffffffff887f9102>] kernel_init_freeable+0x597/0x636
[<ffffffff85de7793>] kernel_init+0x13/0x140
[<ffffffff85e0246a>] ret_from_fork+0x2a/0x40
[<ffffffffffffffff>] 0xffffffffffffffff
unreferenced object 0xffff8806fdc3eac8 (size 256):
comm "swapper/0", pid 1, jiffies 4294900250 (age 774.292s)
hex dump (first 32 bytes):
6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
backtrace:
[<ffffffff85decad8>] kmemleak_alloc+0x28/0x50
[<ffffffff84771246>] __kmalloc+0x206/0x5a0
[<ffffffff859e1261>] genl_register_family+0x711/0x11d0
[<ffffffff888d0897>] devlink_module_init+0x10/0x12
[<ffffffff840022b7>] do_one_initcall+0xb7/0x2a0
[<ffffffff887f9102>] kernel_init_freeable+0x597/0x636
[<ffffffff85de7793>] kernel_init+0x13/0x140
[<ffffffff85e0246a>] ret_from_fork+0x2a/0x40
[<ffffffffffffffff>] 0xffffffffffffffff
unreferenced object 0xffff8806fdff51e8 (size 64):
comm "swapper/0", pid 1, jiffies 4294900263 (age 774.240s)
hex dump (first 32 bytes):
6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
backtrace:
[<ffffffff85decad8>] kmemleak_alloc+0x28/0x50
[<ffffffff84771246>] __kmalloc+0x206/0x5a0
[<ffffffff859e1261>] genl_register_family+0x711/0x11d0
[<ffffffff8885c8f7>] taskstats_init+0x11/0x37
[<ffffffff840022b7>] do_one_initcall+0xb7/0x2a0
[<ffffffff887f9102>] kernel_init_freeable+0x597/0x636
[<ffffffff85de7793>] kernel_init+0x13/0x140
[<ffffffff85e0246a>] ret_from_fork+0x2a/0x40
[<ffffffffffffffff>] 0xffffffffffffffff
BTW this one is also relatively new (not present before 4.9-rc1 but
present on 4fe77d82ef80 already). Not sure which commit could have
added that:
unreferenced object 0xffff8807383bfd48 (size 96):
comm "swapper/0", pid 1, jiffies 4294894636 (age 278.320s)
hex dump (first 32 bytes):
a0 b4 b0 ba ff ff ff ff 00 00 00 00 01 00 00 00 ................
01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<ffffffffb7de59e8>] kmemleak_alloc+0x28/0x50
[<ffffffffb676e2f6>] __kmalloc+0x206/0x5a0
[<ffffffffb69be2d3>] __register_sysctl_table+0xb3/0x1130
[<ffffffffb69bf36b>] register_sysctl+0x1b/0x20
[<ffffffffba840de1>] user_namespace_sysctl_init+0x17/0x4c
[<ffffffffb60022b7>] do_one_initcall+0xb7/0x2a0
[<ffffffffba7eb102>] kernel_init_freeable+0x597/0x636
[<ffffffffb7de0433>] kernel_init+0x13/0x140
[<ffffffffb7dfb36a>] ret_from_fork+0x2a/0x40
[<ffffffffffffffff>] 0xffffffffffffffff
^ permalink raw reply [flat|nested] 22+ messages in thread
* Re: new kmemleak reports (was: Re: [PATCH 0/5] genetlink improvements)
2016-11-01 17:28 ` new kmemleak reports (was: Re: [PATCH 0/5] genetlink improvements) Jakub Kicinski
@ 2016-11-01 18:32 ` Cong Wang
2016-11-01 18:56 ` Jakub Kicinski
0 siblings, 1 reply; 22+ messages in thread
From: Cong Wang @ 2016-11-01 18:32 UTC (permalink / raw)
To: Jakub Kicinski
Cc: Johannes Berg, Dmitry Torokhov, Maciej Żenczykowski,
Linux Kernel Network Developers
[-- Attachment #1: Type: text/plain, Size: 1079 bytes --]
On Tue, Nov 1, 2016 at 10:28 AM, Jakub Kicinski <kubakici@wp.pl> wrote:
> unreferenced object 0xffff8807389cba28 (size 128):
> comm "swapper/0", pid 1, jiffies 4294898463 (age 781.332s)
> hex dump (first 32 bytes):
> 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
> 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
> backtrace:
> [<ffffffff85decad8>] kmemleak_alloc+0x28/0x50
> [<ffffffff84771246>] __kmalloc+0x206/0x5a0
> [<ffffffff859e1261>] genl_register_family+0x711/0x11d0
> [<ffffffff888d9524>] netlbl_mgmt_genl_init+0x10/0x12
> [<ffffffff888d91e8>] netlbl_netlink_init+0x9/0x26
> [<ffffffff888d9254>] netlbl_init+0x4f/0x85
> [<ffffffff840022b7>] do_one_initcall+0xb7/0x2a0
> [<ffffffff887f9102>] kernel_init_freeable+0x597/0x636
> [<ffffffff85de7793>] kernel_init+0x13/0x140
> [<ffffffff85e0246a>] ret_from_fork+0x2a/0x40
Looks like we are missing a kfree(family->attrbuf); on error path,
but it is not related to Johannes' recent patches.
Could the attached patch help?
Thanks.
[-- Attachment #2: genetlink.diff --]
[-- Type: text/plain, Size: 632 bytes --]
diff --git a/net/netlink/genetlink.c b/net/netlink/genetlink.c
index bbd3bff..f0b65fe 100644
--- a/net/netlink/genetlink.c
+++ b/net/netlink/genetlink.c
@@ -364,7 +364,7 @@ int genl_register_family(struct genl_family *family)
start, end + 1, GFP_KERNEL);
if (family->id < 0) {
err = family->id;
- goto errout_locked;
+ goto errout_free;
}
err = genl_validate_assign_mc_groups(family);
@@ -383,6 +383,8 @@ int genl_register_family(struct genl_family *family)
errout_remove:
idr_remove(&genl_fam_idr, family->id);
+errout_free:
+ kfree(family->attrbuf);
errout_locked:
genl_unlock_all();
return err;
^ permalink raw reply related [flat|nested] 22+ messages in thread
* Re: new kmemleak reports (was: Re: [PATCH 0/5] genetlink improvements)
2016-11-01 18:32 ` Cong Wang
@ 2016-11-01 18:56 ` Jakub Kicinski
2016-11-02 20:30 ` Cong Wang
0 siblings, 1 reply; 22+ messages in thread
From: Jakub Kicinski @ 2016-11-01 18:56 UTC (permalink / raw)
To: Cong Wang
Cc: Johannes Berg, Dmitry Torokhov, Maciej Żenczykowski,
Linux Kernel Network Developers
On Tue, 1 Nov 2016 11:32:52 -0700, Cong Wang wrote:
> On Tue, Nov 1, 2016 at 10:28 AM, Jakub Kicinski <kubakici@wp.pl> wrote:
> > unreferenced object 0xffff8807389cba28 (size 128):
> > comm "swapper/0", pid 1, jiffies 4294898463 (age 781.332s)
> > hex dump (first 32 bytes):
> > 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
> > 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
> > backtrace:
> > [<ffffffff85decad8>] kmemleak_alloc+0x28/0x50
> > [<ffffffff84771246>] __kmalloc+0x206/0x5a0
> > [<ffffffff859e1261>] genl_register_family+0x711/0x11d0
> > [<ffffffff888d9524>] netlbl_mgmt_genl_init+0x10/0x12
> > [<ffffffff888d91e8>] netlbl_netlink_init+0x9/0x26
> > [<ffffffff888d9254>] netlbl_init+0x4f/0x85
> > [<ffffffff840022b7>] do_one_initcall+0xb7/0x2a0
> > [<ffffffff887f9102>] kernel_init_freeable+0x597/0x636
> > [<ffffffff85de7793>] kernel_init+0x13/0x140
> > [<ffffffff85e0246a>] ret_from_fork+0x2a/0x40
>
> Looks like we are missing a kfree(family->attrbuf); on error path,
> but it is not related to Johannes' recent patches.
>
> Could the attached patch help?
>
> Thanks.
Still there:
unreferenced object 0xffff88073fb204e8 (size 64):
comm "swapper/0", pid 1, jiffies 4294898455 (age 88.528s)
hex dump (first 32 bytes):
6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
backtrace:
[<ffffffff93decbf8>] kmemleak_alloc+0x28/0x50
[<ffffffff92771246>] __kmalloc+0x206/0x5a0
[<ffffffff939e1471>] genl_register_family+0x921/0x1270
[<ffffffff968d0ecf>] genl_init+0x11/0x43
[<ffffffff920022b7>] do_one_initcall+0xb7/0x2a0
[<ffffffff967f9102>] kernel_init_freeable+0x597/0x636
[<ffffffff93de78b3>] kernel_init+0x13/0x140
[<ffffffff93e0256a>] ret_from_fork+0x2a/0x40
[<ffffffffffffffff>] 0xffffffffffffffff
etc.
I'm getting this quite reliably on every boot.
^ permalink raw reply [flat|nested] 22+ messages in thread
* Re: new kmemleak reports (was: Re: [PATCH 0/5] genetlink improvements)
2016-11-01 18:56 ` Jakub Kicinski
@ 2016-11-02 20:30 ` Cong Wang
2016-11-02 23:47 ` Jakub Kicinski
0 siblings, 1 reply; 22+ messages in thread
From: Cong Wang @ 2016-11-02 20:30 UTC (permalink / raw)
To: Jakub Kicinski
Cc: Johannes Berg, Dmitry Torokhov, Maciej Żenczykowski,
Linux Kernel Network Developers
On Tue, Nov 1, 2016 at 11:56 AM, Jakub Kicinski <kubakici@wp.pl> wrote:
> On Tue, 1 Nov 2016 11:32:52 -0700, Cong Wang wrote:
>> On Tue, Nov 1, 2016 at 10:28 AM, Jakub Kicinski <kubakici@wp.pl> wrote:
>> > unreferenced object 0xffff8807389cba28 (size 128):
>> > comm "swapper/0", pid 1, jiffies 4294898463 (age 781.332s)
>> > hex dump (first 32 bytes):
>> > 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
>> > 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
>> > backtrace:
>> > [<ffffffff85decad8>] kmemleak_alloc+0x28/0x50
>> > [<ffffffff84771246>] __kmalloc+0x206/0x5a0
>> > [<ffffffff859e1261>] genl_register_family+0x711/0x11d0
>> > [<ffffffff888d9524>] netlbl_mgmt_genl_init+0x10/0x12
>> > [<ffffffff888d91e8>] netlbl_netlink_init+0x9/0x26
>> > [<ffffffff888d9254>] netlbl_init+0x4f/0x85
>> > [<ffffffff840022b7>] do_one_initcall+0xb7/0x2a0
>> > [<ffffffff887f9102>] kernel_init_freeable+0x597/0x636
>> > [<ffffffff85de7793>] kernel_init+0x13/0x140
>> > [<ffffffff85e0246a>] ret_from_fork+0x2a/0x40
>>
>> Looks like we are missing a kfree(family->attrbuf); on error path,
>> but it is not related to Johannes' recent patches.
>>
>> Could the attached patch help?
>>
>> Thanks.
>
> Still there:
>
> unreferenced object 0xffff88073fb204e8 (size 64):
> comm "swapper/0", pid 1, jiffies 4294898455 (age 88.528s)
> hex dump (first 32 bytes):
> 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
> 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
> backtrace:
> [<ffffffff93decbf8>] kmemleak_alloc+0x28/0x50
> [<ffffffff92771246>] __kmalloc+0x206/0x5a0
> [<ffffffff939e1471>] genl_register_family+0x921/0x1270
> [<ffffffff968d0ecf>] genl_init+0x11/0x43
> [<ffffffff920022b7>] do_one_initcall+0xb7/0x2a0
> [<ffffffff967f9102>] kernel_init_freeable+0x597/0x636
> [<ffffffff93de78b3>] kernel_init+0x13/0x140
> [<ffffffff93e0256a>] ret_from_fork+0x2a/0x40
> [<ffffffffffffffff>] 0xffffffffffffffff
>
> etc.
Interesting, from the size it does look like we are leaking family->attrbuf,
but I don't see other cases could leak it except the error path I fixed.
Mind doing a quick bisect?
Thanks!
^ permalink raw reply [flat|nested] 22+ messages in thread
* [RFC] make kmemleak scan __ro_after_init section (was: Re: [PATCH 0/5] genetlink improvements)
2016-11-02 20:30 ` Cong Wang
@ 2016-11-02 23:47 ` Jakub Kicinski
0 siblings, 0 replies; 22+ messages in thread
From: Jakub Kicinski @ 2016-11-02 23:47 UTC (permalink / raw)
To: Cong Wang
Cc: Johannes Berg, Linux Kernel Network Developers, LKML,
Catalin Marinas, linux-mm
On Wed, 2 Nov 2016 13:30:34 -0700, Cong Wang wrote:
> On Tue, Nov 1, 2016 at 11:56 AM, Jakub Kicinski <kubakici@wp.pl> wrote:
> > On Tue, 1 Nov 2016 11:32:52 -0700, Cong Wang wrote:
> >> On Tue, Nov 1, 2016 at 10:28 AM, Jakub Kicinski <kubakici@wp.pl> wrote:
> >> > unreferenced object 0xffff8807389cba28 (size 128):
> >> > comm "swapper/0", pid 1, jiffies 4294898463 (age 781.332s)
> >> > hex dump (first 32 bytes):
> >> > 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
> >> > 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
> >> > backtrace:
> >> > [<ffffffff85decad8>] kmemleak_alloc+0x28/0x50
> >> > [<ffffffff84771246>] __kmalloc+0x206/0x5a0
> >> > [<ffffffff859e1261>] genl_register_family+0x711/0x11d0
> >> > [<ffffffff888d9524>] netlbl_mgmt_genl_init+0x10/0x12
> >> > [<ffffffff888d91e8>] netlbl_netlink_init+0x9/0x26
> >> > [<ffffffff888d9254>] netlbl_init+0x4f/0x85
> >> > [<ffffffff840022b7>] do_one_initcall+0xb7/0x2a0
> >> > [<ffffffff887f9102>] kernel_init_freeable+0x597/0x636
> >> > [<ffffffff85de7793>] kernel_init+0x13/0x140
> >> > [<ffffffff85e0246a>] ret_from_fork+0x2a/0x40
> >>
> >> Looks like we are missing a kfree(family->attrbuf); on error path,
> >> but it is not related to Johannes' recent patches.
> >>
> >> Could the attached patch help?
> >
> > Still there:
> >
> > unreferenced object 0xffff88073fb204e8 (size 64):
> > comm "swapper/0", pid 1, jiffies 4294898455 (age 88.528s)
> > hex dump (first 32 bytes):
> > 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
> > 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
> > backtrace:
> > [<ffffffff93decbf8>] kmemleak_alloc+0x28/0x50
> > [<ffffffff92771246>] __kmalloc+0x206/0x5a0
> > [<ffffffff939e1471>] genl_register_family+0x921/0x1270
> > [<ffffffff968d0ecf>] genl_init+0x11/0x43
> > [<ffffffff920022b7>] do_one_initcall+0xb7/0x2a0
> > [<ffffffff967f9102>] kernel_init_freeable+0x597/0x636
> > [<ffffffff93de78b3>] kernel_init+0x13/0x140
> > [<ffffffff93e0256a>] ret_from_fork+0x2a/0x40
> > [<ffffffffffffffff>] 0xffffffffffffffff
> >
> > etc.
>
> Interesting, from the size it does look like we are leaking family->attrbuf,
> but I don't see other cases could leak it except the error path I fixed.
>
> Mind doing a quick bisect?
Thanks for looking into this! Bisect led me to the following commit:
commit 56989f6d8568c21257dcec0f5e644d5570ba3281
Author: Johannes Berg <johannes.berg@intel.com>
Date: Mon Oct 24 14:40:05 2016 +0200
genetlink: mark families as __ro_after_init
Now genl_register_family() is the only thing (other than the
users themselves, perhaps, but I didn't find any doing that)
writing to the family struct.
In all families that I found, genl_register_family() is only
called from __init functions (some indirectly, in which case
I've add __init annotations to clarifly things), so all can
actually be marked __ro_after_init.
This protects the data structure from accidental corruption.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
I realized that kmemleak is not scanning the __ro_after_init section...
Following patch solves the false positives but I wonder if it's the
right/acceptable solution.
--->8----------------------------------------------------------------
diff --git a/arch/s390/kernel/vmlinux.lds.S b/arch/s390/kernel/vmlinux.lds.S
index 000e6e91f6a0..841579932c52 100644
--- a/arch/s390/kernel/vmlinux.lds.S
+++ b/arch/s390/kernel/vmlinux.lds.S
@@ -62,9 +62,11 @@ SECTIONS
. = ALIGN(PAGE_SIZE);
__start_ro_after_init = .;
+ VMLINUX_SYMBOL(__start_data_ro_after_init) = .;
.data..ro_after_init : {
*(.data..ro_after_init)
}
+ VMLINUX_SYMBOL(__end_data_ro_after_init) = .;
EXCEPTION_TABLE(16)
. = ALIGN(PAGE_SIZE);
__end_ro_after_init = .;
diff --git a/include/asm-generic/sections.h b/include/asm-generic/sections.h
index af0254c09424..4df64a1fc09e 100644
--- a/include/asm-generic/sections.h
+++ b/include/asm-generic/sections.h
@@ -14,6 +14,8 @@
* [_sdata, _edata]: contains .data.* sections, may also contain .rodata.*
* and/or .init.* sections.
* [__start_rodata, __end_rodata]: contains .rodata.* sections
+ * [__start_data_ro_after_init, __end_data_ro_after_init]:
+ * contains data.ro_after_init section
* [__init_begin, __init_end]: contains .init.* sections, but .init.text.*
* may be out of this range on some architectures.
* [_sinittext, _einittext]: contains .init.text.* sections
@@ -31,6 +33,7 @@
extern char __bss_start[], __bss_stop[];
extern char __init_begin[], __init_end[];
extern char _sinittext[], _einittext[];
+extern char __start_data_ro_after_init[], __end_data_ro_after_init[];
extern char _end[];
extern char __per_cpu_load[], __per_cpu_start[], __per_cpu_end[];
extern char __kprobes_text_start[], __kprobes_text_end[];
diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h
index 30747960bc54..71c75fb64945 100644
--- a/include/asm-generic/vmlinux.lds.h
+++ b/include/asm-generic/vmlinux.lds.h
@@ -259,7 +259,10 @@
* own by defining an empty RO_AFTER_INIT_DATA.
*/
#ifndef RO_AFTER_INIT_DATA
-#define RO_AFTER_INIT_DATA *(.data..ro_after_init)
+#define RO_AFTER_INIT_DATA \
+ VMLINUX_SYMBOL(__start_data_ro_after_init) = .; \
+ *(.data..ro_after_init) \
+ VMLINUX_SYMBOL(__end_data_ro_after_init) = .;
#endif
/*
diff --git a/mm/kmemleak.c b/mm/kmemleak.c
index e5355a5b423f..d1380ed93fdf 100644
--- a/mm/kmemleak.c
+++ b/mm/kmemleak.c
@@ -1414,6 +1414,7 @@ static void kmemleak_scan(void)
/* data/bss scanning */
scan_large_block(_sdata, _edata);
scan_large_block(__bss_start, __bss_stop);
+ scan_large_block(__start_data_ro_after_init, __end_data_ro_after_init);
#ifdef CONFIG_SMP
/* per-cpu sections scanning */
^ permalink raw reply related [flat|nested] 22+ messages in thread
* [RFC] make kmemleak scan __ro_after_init section (was: Re: [PATCH 0/5] genetlink improvements)
@ 2016-11-02 23:47 ` Jakub Kicinski
0 siblings, 0 replies; 22+ messages in thread
From: Jakub Kicinski @ 2016-11-02 23:47 UTC (permalink / raw)
To: Cong Wang
Cc: Johannes Berg, Linux Kernel Network Developers, LKML,
Catalin Marinas, linux-mm
On Wed, 2 Nov 2016 13:30:34 -0700, Cong Wang wrote:
> On Tue, Nov 1, 2016 at 11:56 AM, Jakub Kicinski <kubakici@wp.pl> wrote:
> > On Tue, 1 Nov 2016 11:32:52 -0700, Cong Wang wrote:
> >> On Tue, Nov 1, 2016 at 10:28 AM, Jakub Kicinski <kubakici@wp.pl> wrote:
> >> > unreferenced object 0xffff8807389cba28 (size 128):
> >> > comm "swapper/0", pid 1, jiffies 4294898463 (age 781.332s)
> >> > hex dump (first 32 bytes):
> >> > 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
> >> > 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
> >> > backtrace:
> >> > [<ffffffff85decad8>] kmemleak_alloc+0x28/0x50
> >> > [<ffffffff84771246>] __kmalloc+0x206/0x5a0
> >> > [<ffffffff859e1261>] genl_register_family+0x711/0x11d0
> >> > [<ffffffff888d9524>] netlbl_mgmt_genl_init+0x10/0x12
> >> > [<ffffffff888d91e8>] netlbl_netlink_init+0x9/0x26
> >> > [<ffffffff888d9254>] netlbl_init+0x4f/0x85
> >> > [<ffffffff840022b7>] do_one_initcall+0xb7/0x2a0
> >> > [<ffffffff887f9102>] kernel_init_freeable+0x597/0x636
> >> > [<ffffffff85de7793>] kernel_init+0x13/0x140
> >> > [<ffffffff85e0246a>] ret_from_fork+0x2a/0x40
> >>
> >> Looks like we are missing a kfree(family->attrbuf); on error path,
> >> but it is not related to Johannes' recent patches.
> >>
> >> Could the attached patch help?
> >
> > Still there:
> >
> > unreferenced object 0xffff88073fb204e8 (size 64):
> > comm "swapper/0", pid 1, jiffies 4294898455 (age 88.528s)
> > hex dump (first 32 bytes):
> > 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
> > 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
> > backtrace:
> > [<ffffffff93decbf8>] kmemleak_alloc+0x28/0x50
> > [<ffffffff92771246>] __kmalloc+0x206/0x5a0
> > [<ffffffff939e1471>] genl_register_family+0x921/0x1270
> > [<ffffffff968d0ecf>] genl_init+0x11/0x43
> > [<ffffffff920022b7>] do_one_initcall+0xb7/0x2a0
> > [<ffffffff967f9102>] kernel_init_freeable+0x597/0x636
> > [<ffffffff93de78b3>] kernel_init+0x13/0x140
> > [<ffffffff93e0256a>] ret_from_fork+0x2a/0x40
> > [<ffffffffffffffff>] 0xffffffffffffffff
> >
> > etc.
>
> Interesting, from the size it does look like we are leaking family->attrbuf,
> but I don't see other cases could leak it except the error path I fixed.
>
> Mind doing a quick bisect?
Thanks for looking into this! Bisect led me to the following commit:
commit 56989f6d8568c21257dcec0f5e644d5570ba3281
Author: Johannes Berg <johannes.berg@intel.com>
Date: Mon Oct 24 14:40:05 2016 +0200
genetlink: mark families as __ro_after_init
Now genl_register_family() is the only thing (other than the
users themselves, perhaps, but I didn't find any doing that)
writing to the family struct.
In all families that I found, genl_register_family() is only
called from __init functions (some indirectly, in which case
I've add __init annotations to clarifly things), so all can
actually be marked __ro_after_init.
This protects the data structure from accidental corruption.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
I realized that kmemleak is not scanning the __ro_after_init section...
Following patch solves the false positives but I wonder if it's the
right/acceptable solution.
--->8----------------------------------------------------------------
diff --git a/arch/s390/kernel/vmlinux.lds.S b/arch/s390/kernel/vmlinux.lds.S
index 000e6e91f6a0..841579932c52 100644
--- a/arch/s390/kernel/vmlinux.lds.S
+++ b/arch/s390/kernel/vmlinux.lds.S
@@ -62,9 +62,11 @@ SECTIONS
. = ALIGN(PAGE_SIZE);
__start_ro_after_init = .;
+ VMLINUX_SYMBOL(__start_data_ro_after_init) = .;
.data..ro_after_init : {
*(.data..ro_after_init)
}
+ VMLINUX_SYMBOL(__end_data_ro_after_init) = .;
EXCEPTION_TABLE(16)
. = ALIGN(PAGE_SIZE);
__end_ro_after_init = .;
diff --git a/include/asm-generic/sections.h b/include/asm-generic/sections.h
index af0254c09424..4df64a1fc09e 100644
--- a/include/asm-generic/sections.h
+++ b/include/asm-generic/sections.h
@@ -14,6 +14,8 @@
* [_sdata, _edata]: contains .data.* sections, may also contain .rodata.*
* and/or .init.* sections.
* [__start_rodata, __end_rodata]: contains .rodata.* sections
+ * [__start_data_ro_after_init, __end_data_ro_after_init]:
+ * contains data.ro_after_init section
* [__init_begin, __init_end]: contains .init.* sections, but .init.text.*
* may be out of this range on some architectures.
* [_sinittext, _einittext]: contains .init.text.* sections
@@ -31,6 +33,7 @@
extern char __bss_start[], __bss_stop[];
extern char __init_begin[], __init_end[];
extern char _sinittext[], _einittext[];
+extern char __start_data_ro_after_init[], __end_data_ro_after_init[];
extern char _end[];
extern char __per_cpu_load[], __per_cpu_start[], __per_cpu_end[];
extern char __kprobes_text_start[], __kprobes_text_end[];
diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h
index 30747960bc54..71c75fb64945 100644
--- a/include/asm-generic/vmlinux.lds.h
+++ b/include/asm-generic/vmlinux.lds.h
@@ -259,7 +259,10 @@
* own by defining an empty RO_AFTER_INIT_DATA.
*/
#ifndef RO_AFTER_INIT_DATA
-#define RO_AFTER_INIT_DATA *(.data..ro_after_init)
+#define RO_AFTER_INIT_DATA \
+ VMLINUX_SYMBOL(__start_data_ro_after_init) = .; \
+ *(.data..ro_after_init) \
+ VMLINUX_SYMBOL(__end_data_ro_after_init) = .;
#endif
/*
diff --git a/mm/kmemleak.c b/mm/kmemleak.c
index e5355a5b423f..d1380ed93fdf 100644
--- a/mm/kmemleak.c
+++ b/mm/kmemleak.c
@@ -1414,6 +1414,7 @@ static void kmemleak_scan(void)
/* data/bss scanning */
scan_large_block(_sdata, _edata);
scan_large_block(__bss_start, __bss_stop);
+ scan_large_block(__start_data_ro_after_init, __end_data_ro_after_init);
#ifdef CONFIG_SMP
/* per-cpu sections scanning */
--
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^ permalink raw reply related [flat|nested] 22+ messages in thread
* Re: [RFC] make kmemleak scan __ro_after_init section (was: Re: [PATCH 0/5] genetlink improvements)
2016-11-02 23:47 ` Jakub Kicinski
@ 2016-11-03 5:40 ` Cong Wang
-1 siblings, 0 replies; 22+ messages in thread
From: Cong Wang @ 2016-11-03 5:40 UTC (permalink / raw)
To: Jakub Kicinski
Cc: Johannes Berg, Linux Kernel Network Developers, LKML,
Catalin Marinas, linux-mm
On Wed, Nov 2, 2016 at 4:47 PM, Jakub Kicinski <kubakici@wp.pl> wrote:
>
> Thanks for looking into this! Bisect led me to the following commit:
>
> commit 56989f6d8568c21257dcec0f5e644d5570ba3281
> Author: Johannes Berg <johannes.berg@intel.com>
> Date: Mon Oct 24 14:40:05 2016 +0200
>
> genetlink: mark families as __ro_after_init
>
> Now genl_register_family() is the only thing (other than the
> users themselves, perhaps, but I didn't find any doing that)
> writing to the family struct.
>
> In all families that I found, genl_register_family() is only
> called from __init functions (some indirectly, in which case
> I've add __init annotations to clarifly things), so all can
> actually be marked __ro_after_init.
>
> This protects the data structure from accidental corruption.
>
> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
> Signed-off-by: David S. Miller <davem@davemloft.net>
>
>
> I realized that kmemleak is not scanning the __ro_after_init section...
> Following patch solves the false positives but I wonder if it's the
> right/acceptable solution.
Nice work! Looks reasonable to me, but I am definitely not familiar
with kmemleak. ;)
^ permalink raw reply [flat|nested] 22+ messages in thread
* Re: [RFC] make kmemleak scan __ro_after_init section (was: Re: [PATCH 0/5] genetlink improvements)
@ 2016-11-03 5:40 ` Cong Wang
0 siblings, 0 replies; 22+ messages in thread
From: Cong Wang @ 2016-11-03 5:40 UTC (permalink / raw)
To: Jakub Kicinski
Cc: Johannes Berg, Linux Kernel Network Developers, LKML,
Catalin Marinas, linux-mm
On Wed, Nov 2, 2016 at 4:47 PM, Jakub Kicinski <kubakici@wp.pl> wrote:
>
> Thanks for looking into this! Bisect led me to the following commit:
>
> commit 56989f6d8568c21257dcec0f5e644d5570ba3281
> Author: Johannes Berg <johannes.berg@intel.com>
> Date: Mon Oct 24 14:40:05 2016 +0200
>
> genetlink: mark families as __ro_after_init
>
> Now genl_register_family() is the only thing (other than the
> users themselves, perhaps, but I didn't find any doing that)
> writing to the family struct.
>
> In all families that I found, genl_register_family() is only
> called from __init functions (some indirectly, in which case
> I've add __init annotations to clarifly things), so all can
> actually be marked __ro_after_init.
>
> This protects the data structure from accidental corruption.
>
> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
> Signed-off-by: David S. Miller <davem@davemloft.net>
>
>
> I realized that kmemleak is not scanning the __ro_after_init section...
> Following patch solves the false positives but I wonder if it's the
> right/acceptable solution.
Nice work! Looks reasonable to me, but I am definitely not familiar
with kmemleak. ;)
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
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^ permalink raw reply [flat|nested] 22+ messages in thread
* Re: [RFC] make kmemleak scan __ro_after_init section (was: Re: [PATCH 0/5] genetlink improvements)
2016-11-02 23:47 ` Jakub Kicinski
@ 2016-11-03 15:48 ` Johannes Berg
-1 siblings, 0 replies; 22+ messages in thread
From: Johannes Berg @ 2016-11-03 15:48 UTC (permalink / raw)
To: Jakub Kicinski, Cong Wang
Cc: Linux Kernel Network Developers, LKML, Catalin Marinas, linux-mm
Hi,
Sorry for not chipping in earlier - LPC is taking my time.
> > > > Looks like we are missing a kfree(family->attrbuf); on error
> > > > path, but it is not related to Johannes' recent patches.
Actually, I think it *is* related to my patch - I inserted the code
there in the wrong place or so. I'll find a fix for that when I'm back
home, or you (Cong) can submit yours. It wasn't likely that this was
the problem though, since that's just an error path that should never
happen (we have <30 genl families, and a 16-bit space for their IDs)
> I realized that kmemleak is not scanning the __ro_after_init
> section...
> Following patch solves the false positives but I wonder if it's the
> right/acceptable solution.
Hah, makes sense to me, but I guess we really want Catalin to comment
:)
johannes
^ permalink raw reply [flat|nested] 22+ messages in thread
* Re: [RFC] make kmemleak scan __ro_after_init section (was: Re: [PATCH 0/5] genetlink improvements)
@ 2016-11-03 15:48 ` Johannes Berg
0 siblings, 0 replies; 22+ messages in thread
From: Johannes Berg @ 2016-11-03 15:48 UTC (permalink / raw)
To: Jakub Kicinski, Cong Wang
Cc: Linux Kernel Network Developers, LKML, Catalin Marinas, linux-mm
Hi,
Sorry for not chipping in earlier - LPC is taking my time.
> > > > Looks like we are missing a kfree(family->attrbuf); on error
> > > > path, but it is not related to Johannes' recent patches.
Actually, I think it *is* related to my patch - I inserted the code
there in the wrong place or so. I'll find a fix for that when I'm back
home, or you (Cong) can submit yours. It wasn't likely that this was
the problem though, since that's just an error path that should never
happen (we have <30 genl families, and a 16-bit space for their IDs)
> I realized that kmemleak is not scanning the __ro_after_init
> section...
> Following patch solves the false positives but I wonder if it's the
> right/acceptable solution.
Hah, makes sense to me, but I guess we really want Catalin to comment
:)
johannes
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
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^ permalink raw reply [flat|nested] 22+ messages in thread
* Re: [RFC] make kmemleak scan __ro_after_init section (was: Re: [PATCH 0/5] genetlink improvements)
2016-11-02 23:47 ` Jakub Kicinski
@ 2016-11-03 20:49 ` Catalin Marinas
-1 siblings, 0 replies; 22+ messages in thread
From: Catalin Marinas @ 2016-11-03 20:49 UTC (permalink / raw)
To: Jakub Kicinski
Cc: Cong Wang, Johannes Berg, Linux Kernel Network Developers, LKML,
linux-mm
On Wed, Nov 02, 2016 at 11:47:55PM +0000, Jakub Kicinski wrote:
> I realized that kmemleak is not scanning the __ro_after_init section...
> Following patch solves the false positives but I wonder if it's the
> right/acceptable solution.
Thanks for putting this together. I actually hit a similar issue on
arm64 but didn't get the chance to fix it (also at LPC). With a proper
commit message, feel free to add:
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
^ permalink raw reply [flat|nested] 22+ messages in thread
* Re: [RFC] make kmemleak scan __ro_after_init section (was: Re: [PATCH 0/5] genetlink improvements)
@ 2016-11-03 20:49 ` Catalin Marinas
0 siblings, 0 replies; 22+ messages in thread
From: Catalin Marinas @ 2016-11-03 20:49 UTC (permalink / raw)
To: Jakub Kicinski
Cc: Cong Wang, Johannes Berg, Linux Kernel Network Developers, LKML,
linux-mm
On Wed, Nov 02, 2016 at 11:47:55PM +0000, Jakub Kicinski wrote:
> I realized that kmemleak is not scanning the __ro_after_init section...
> Following patch solves the false positives but I wonder if it's the
> right/acceptable solution.
Thanks for putting this together. I actually hit a similar issue on
arm64 but didn't get the chance to fix it (also at LPC). With a proper
commit message, feel free to add:
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
^ permalink raw reply [flat|nested] 22+ messages in thread
end of thread, other threads:[~2016-11-03 20:49 UTC | newest]
Thread overview: 22+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2016-10-24 12:40 [PATCH 0/5] genetlink improvements Johannes Berg
2016-10-24 12:40 ` [PATCH 1/5] genetlink: introduce and use genl_family_attrbuf() Johannes Berg
2016-10-24 12:40 ` [PATCH 2/5] genetlink: no longer support using static family IDs Johannes Berg
2016-10-24 12:40 ` [PATCH 3/5] genetlink: statically initialize families Johannes Berg
2016-10-24 12:55 ` Johannes Berg
2016-10-25 11:25 ` David Laight
2016-10-25 11:38 ` Johannes Berg
2016-10-24 12:40 ` [PATCH 4/5] genetlink: use idr to track families Johannes Berg
2016-10-24 12:40 ` [PATCH 5/5] genetlink: mark families as __ro_after_init Johannes Berg
2016-10-27 20:16 ` [PATCH 0/5] genetlink improvements David Miller
2016-11-01 17:28 ` new kmemleak reports (was: Re: [PATCH 0/5] genetlink improvements) Jakub Kicinski
2016-11-01 18:32 ` Cong Wang
2016-11-01 18:56 ` Jakub Kicinski
2016-11-02 20:30 ` Cong Wang
2016-11-02 23:47 ` [RFC] make kmemleak scan __ro_after_init section " Jakub Kicinski
2016-11-02 23:47 ` Jakub Kicinski
2016-11-03 5:40 ` Cong Wang
2016-11-03 5:40 ` Cong Wang
2016-11-03 15:48 ` Johannes Berg
2016-11-03 15:48 ` Johannes Berg
2016-11-03 20:49 ` Catalin Marinas
2016-11-03 20:49 ` Catalin Marinas
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