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| author | Jakub Kicinski <kuba@kernel.org> | 2024-05-01 18:37:17 -0700 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2024-05-01 18:37:17 -0700 |
| commit | 5165c48ef1afbb3e0126b36be84ffaa6f05cb6f0 (patch) | |
| tree | 54e09e532fed923864889afc954475987af31738 /include | |
| parent | 496bc5861c73f34e0486612f93634a9289de0dfb (diff) | |
| parent | bf4ea58874df3d43f7264709cec7fe320616552c (diff) | |
| download | linux-5165c48ef1afbb3e0126b36be84ffaa6f05cb6f0.tar.gz linux-5165c48ef1afbb3e0126b36be84ffaa6f05cb6f0.zip | |
Merge branch 'arp-random-clean-up-and-rcu-conversion-for-ioctl-siocgarp'
Kuniyuki Iwashima says:
====================
arp: Random clean up and RCU conversion for ioctl(SIOCGARP).
arp_ioctl() holds rtnl_lock() regardless of cmd (SIOCDARP, SIOCSARP,
and SIOCGARP) to get net_device by __dev_get_by_name() and copy
dev->name safely.
In the SIOCGARP path, arp_req_get() calls neigh_lookup(), which looks
up a neighbour entry under RCU.
This series cleans up ioctl() code a bit and extends the RCU section
not to take rtnl_lock() and instead use dev_get_by_name_rcu() and
netdev_copy_name() for SIOCGARP.
v2: https://lore.kernel.org/netdev/20240425170002.68160-1-kuniyu@amazon.com/
v1: https://lore.kernel.org/netdev/20240422194755.4221-1-kuniyu@amazon.com/
====================
Link: https://lore.kernel.org/r/20240430015813.71143-1-kuniyu@amazon.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/netdevice.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index f849e7d110ed..41853424b41d 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -3136,6 +3136,7 @@ struct net_device *netdev_get_by_name(struct net *net, const char *name, netdevice_tracker *tracker, gfp_t gfp); struct net_device *dev_get_by_index_rcu(struct net *net, int ifindex); struct net_device *dev_get_by_napi_id(unsigned int napi_id); +void netdev_copy_name(struct net_device *dev, char *name); static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev, unsigned short type, |