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| author | Sven Eckelmann <sven@narfation.org> | 2018-06-01 19:24:23 +0200 |
|---|---|---|
| committer | Simon Wunderlich <sw@simonwunderlich.de> | 2018-06-23 10:29:33 +0200 |
| commit | 36dc621ceca1be3ec885aeade5fdafbbcc452a6d (patch) | |
| tree | 05814961975fcf90b37f0f197440ba5dd315700e /net/batman-adv/debugfs.h | |
| parent | 9713cb0cf19f1cec6c007e3b37be0697042b6720 (diff) | |
| download | linux-36dc621ceca1be3ec885aeade5fdafbbcc452a6d.tar.gz linux-36dc621ceca1be3ec885aeade5fdafbbcc452a6d.tar.bz2 linux-36dc621ceca1be3ec885aeade5fdafbbcc452a6d.zip | |
batman-adv: Fix debugfs path for renamed hardif
batman-adv is creating special debugfs directories in the init
net_namespace for each valid hard-interface (net_device). But it is
possible to rename a net_device to a completely different name then the
original one.
It can therefore happen that a user registers a new net_device which gets
the name "wlan0" assigned by default. batman-adv is also adding a new
directory under $debugfs/batman-adv/ with the name "wlan0".
The user then decides to rename this device to "wl_pri" and registers a
different device. The kernel may now decide to use the name "wlan0" again
for this new device. batman-adv will detect it as a valid net_device and
tries to create a directory with the name "wlan0" under
$debugfs/batman-adv/. But there already exists one with this name under
this path and thus this fails. batman-adv will detect a problem and
rollback the registering of this device.
batman-adv must therefore take care of renaming the debugfs directories
for hard-interfaces whenever it detects such a net_device rename.
Fixes: 5bc7c1eb44f2 ("batman-adv: add debugfs structure for information per interface")
Reported-by: John Soros <sorosj@gmail.com>
Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
Diffstat (limited to 'net/batman-adv/debugfs.h')
| -rw-r--r-- | net/batman-adv/debugfs.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/net/batman-adv/debugfs.h b/net/batman-adv/debugfs.h index 37b069698b04..8538a7a75e93 100644 --- a/net/batman-adv/debugfs.h +++ b/net/batman-adv/debugfs.h @@ -32,6 +32,7 @@ void batadv_debugfs_destroy(void); int batadv_debugfs_add_meshif(struct net_device *dev); void batadv_debugfs_del_meshif(struct net_device *dev); int batadv_debugfs_add_hardif(struct batadv_hard_iface *hard_iface); +void batadv_debugfs_rename_hardif(struct batadv_hard_iface *hard_iface); void batadv_debugfs_del_hardif(struct batadv_hard_iface *hard_iface); #else @@ -60,6 +61,11 @@ int batadv_debugfs_add_hardif(struct batadv_hard_iface *hard_iface) } static inline +void batadv_debugfs_rename_hardif(struct batadv_hard_iface *hard_iface) +{ +} + +static inline void batadv_debugfs_del_hardif(struct batadv_hard_iface *hard_iface) { } |