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Date: Fri, 24 Apr 2020 18:20:46 +0200
From: Christian Brauner <christian.brauner@...ntu.com>
To: Jens Axboe <axboe@...nel.dk>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
linux-kernel@...r.kernel.org, linux-block@...r.kernel.org,
linux-api@...r.kernel.org
Cc: Jonathan Corbet <corbet@....net>, Serge Hallyn <serge@...lyn.com>,
"Rafael J. Wysocki" <rafael@...nel.org>, Tejun Heo <tj@...nel.org>,
"David S. Miller" <davem@...emloft.net>,
Christian Brauner <christian.brauner@...ntu.com>,
Saravana Kannan <saravanak@...gle.com>,
Jan Kara <jack@...e.cz>, David Howells <dhowells@...hat.com>,
Seth Forshee <seth.forshee@...onical.com>,
David Rheinsberg <david.rheinsberg@...il.com>,
Tom Gundersen <teg@...m.no>,
Christian Kellner <ckellner@...hat.com>,
Dmitry Vyukov <dvyukov@...gle.com>,
Stéphane Graber <stgraber@...ntu.com>,
linux-doc@...r.kernel.org, netdev@...r.kernel.org,
Steve Barber <smbarber@...gle.com>,
Dylan Reid <dgreid@...gle.com>,
Filipe Brandenburger <filbranden@...il.com>,
Kees Cook <keescook@...omium.org>,
Benjamin Elder <bentheelder@...gle.com>,
Akihiro Suda <suda.kyoto@...il.com>
Subject: [PATCH v3 1/7] kobject_uevent: remove unneeded netlink_ns check
Back when I rewrote large chunks of uevent sending I should have removed
the .netlink_ns method completely after having removed it's last user in
[1]. Let's remove it now and also remove the helper associated with it
that is unused too.
Fixes: a3498436b3a0 ("netns: restrict uevents") /* No backport needed. */
Cc: "David S. Miller" <davem@...emloft.net>
Reviewed-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Signed-off-by: Christian Brauner <christian.brauner@...ntu.com>
---
/* v2 */
unchanged
/* v3 */
unchanged
---
Documentation/filesystems/sysfs-tagging.txt | 1 -
include/linux/kobject_ns.h | 3 ---
lib/kobject.c | 13 -------------
lib/kobject_uevent.c | 2 +-
net/core/net-sysfs.c | 6 ------
5 files changed, 1 insertion(+), 24 deletions(-)
diff --git a/Documentation/filesystems/sysfs-tagging.txt b/Documentation/filesystems/sysfs-tagging.txt
index c7c8e6438958..51d28dd8b84f 100644
--- a/Documentation/filesystems/sysfs-tagging.txt
+++ b/Documentation/filesystems/sysfs-tagging.txt
@@ -37,6 +37,5 @@ Users of this interface:
- define a type in the kobj_ns_type enumeration.
- call kobj_ns_type_register() with its kobj_ns_type_operations which has
- current_ns() which returns current's namespace
- - netlink_ns() which returns a socket's namespace
- initial_ns() which returns the initial namesapce
- call kobj_ns_exit() when an individual tag is no longer valid
diff --git a/include/linux/kobject_ns.h b/include/linux/kobject_ns.h
index 069aa2ebef90..991a9286bcea 100644
--- a/include/linux/kobject_ns.h
+++ b/include/linux/kobject_ns.h
@@ -32,7 +32,6 @@ enum kobj_ns_type {
/*
* Callbacks so sysfs can determine namespaces
* @grab_current_ns: return a new reference to calling task's namespace
- * @netlink_ns: return namespace to which a sock belongs (right?)
* @initial_ns: return the initial namespace (i.e. init_net_ns)
* @drop_ns: drops a reference to namespace
*/
@@ -40,7 +39,6 @@ struct kobj_ns_type_operations {
enum kobj_ns_type type;
bool (*current_may_mount)(void);
void *(*grab_current_ns)(void);
- const void *(*netlink_ns)(struct sock *sk);
const void *(*initial_ns)(void);
void (*drop_ns)(void *);
};
@@ -52,7 +50,6 @@ const struct kobj_ns_type_operations *kobj_ns_ops(struct kobject *kobj);
bool kobj_ns_current_may_mount(enum kobj_ns_type type);
void *kobj_ns_grab_current(enum kobj_ns_type type);
-const void *kobj_ns_netlink(enum kobj_ns_type type, struct sock *sk);
const void *kobj_ns_initial(enum kobj_ns_type type);
void kobj_ns_drop(enum kobj_ns_type type, void *ns);
diff --git a/lib/kobject.c b/lib/kobject.c
index 83198cb37d8d..6f07083cc111 100644
--- a/lib/kobject.c
+++ b/lib/kobject.c
@@ -1092,19 +1092,6 @@ void *kobj_ns_grab_current(enum kobj_ns_type type)
}
EXPORT_SYMBOL_GPL(kobj_ns_grab_current);
-const void *kobj_ns_netlink(enum kobj_ns_type type, struct sock *sk)
-{
- const void *ns = NULL;
-
- spin_lock(&kobj_ns_type_lock);
- if ((type > KOBJ_NS_TYPE_NONE) && (type < KOBJ_NS_TYPES) &&
- kobj_ns_ops_tbl[type])
- ns = kobj_ns_ops_tbl[type]->netlink_ns(sk);
- spin_unlock(&kobj_ns_type_lock);
-
- return ns;
-}
-
const void *kobj_ns_initial(enum kobj_ns_type type)
{
const void *ns = NULL;
diff --git a/lib/kobject_uevent.c b/lib/kobject_uevent.c
index 7998affa45d4..a45b3eeaa2b9 100644
--- a/lib/kobject_uevent.c
+++ b/lib/kobject_uevent.c
@@ -400,7 +400,7 @@ static int kobject_uevent_net_broadcast(struct kobject *kobj,
* are the only tag relevant here since we want to decide which
* network namespaces to broadcast the uevent into.
*/
- if (ops && ops->netlink_ns && kobj->ktype->namespace)
+ if (ops && kobj->ktype->namespace)
if (ops->type == KOBJ_NS_TYPE_NET)
net = kobj->ktype->namespace(kobj);
diff --git a/net/core/net-sysfs.c b/net/core/net-sysfs.c
index 4773ad6ec111..3fa35a3c843a 100644
--- a/net/core/net-sysfs.c
+++ b/net/core/net-sysfs.c
@@ -1694,16 +1694,10 @@ static const void *net_initial_ns(void)
return &init_net;
}
-static const void *net_netlink_ns(struct sock *sk)
-{
- return sock_net(sk);
-}
-
const struct kobj_ns_type_operations net_ns_type_operations = {
.type = KOBJ_NS_TYPE_NET,
.current_may_mount = net_current_may_mount,
.grab_current_ns = net_grab_current_ns,
- .netlink_ns = net_netlink_ns,
.initial_ns = net_initial_ns,
.drop_ns = net_drop_ns,
};
--
2.26.2
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