diff options
| author | Christian Brauner <brauner@kernel.org> | 2026-04-01 12:15:58 +0200 |
|---|---|---|
| committer | Christian Brauner <brauner@kernel.org> | 2026-04-09 14:36:52 +0200 |
| commit | e3b2cf6e5dba416a03152f299d99982dfe1e861d (patch) | |
| tree | d10833a41819fac2d0c066bd80def58a36453228 /net/wireless | |
| parent | 07712db80857d5d09ae08f3df85a708ecfc3b61f (diff) | |
kernfs: pass struct ns_common instead of const void * for namespace tags
kernfs has historically used const void * to pass around namespace tags
used for directory-level namespace filtering. The only current user of
this is sysfs network namespace tagging where struct net pointers are
cast to void *.
Replace all const void * namespace parameters with const struct
ns_common * throughout the kernfs, sysfs, and kobject namespace layers.
This includes the kobj_ns_type_operations callbacks, kobject_namespace(),
and all sysfs/kernfs APIs that accept or return namespace tags.
Passing struct ns_common is needed because various codepaths require
access to the underlying namespace. A struct ns_common can always be
converted back to the concrete namespace type (e.g., struct net) via
container_of() or to_ns_common() in the reverse direction.
This is a preparatory change for switching to ns_id-based directory
iteration to prevent a KASLR pointer leak through the current use of
raw namespace pointers as hash seeds and comparison keys.
Signed-off-by: Christian Brauner <brauner@kernel.org>
Diffstat (limited to 'net/wireless')
| -rw-r--r-- | net/wireless/sysfs.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/net/wireless/sysfs.c b/net/wireless/sysfs.c index 2e0ea69b9604..0b9abe70d39d 100644 --- a/net/wireless/sysfs.c +++ b/net/wireless/sysfs.c @@ -154,11 +154,11 @@ static SIMPLE_DEV_PM_OPS(wiphy_pm_ops, wiphy_suspend, wiphy_resume); #define WIPHY_PM_OPS NULL #endif -static const void *wiphy_namespace(const struct device *d) +static const struct ns_common *wiphy_namespace(const struct device *d) { struct wiphy *wiphy = container_of(d, struct wiphy, dev); - return wiphy_net(wiphy); + return to_ns_common(wiphy_net(wiphy)); } struct class ieee80211_class = { |