lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

[NET]: Move destructor from neigh->ops to neigh_params

Browse Source 
struct neigh_ops currently has a destructor field, which no in-kernel
drivers outside of infiniband use.  The infiniband/ulp/ipoib in-tree
driver stashes some info in the neighbour structure (the results of
the second-stage lookup from ARP results to real link-level path), and
it uses neigh->ops->destructor to get a callback so it can clean up
this extra info when a neighbour is freed.  We've run into problems
with this: since the destructor is in an ops field that is shared
between neighbours that may belong to different net devices, there's
no way to set/clear it safely.

The following patch moves this field to neigh_parms where it can be
safely set, together with its twin neigh_setup.  Two additional
patches in the patch series update ipoib to use this new interface.

Signed-off-by: Michael S. Tsirkin <mst@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Michael S. Tsirkin
2006-03-20 22:25:41 -08:00
committed by David S. Miller
parent 53dcb0e38c
commit c5ecd62c25
3 changed files with 4 additions and 18 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
include/net/neighbour.h
View File

@@ -68,6 +68,7 @@ struct neigh_parms
struct net_device *dev;
struct neigh_parms *next;
int (*neigh_setup)(struct neighbour *);
void (*neigh_destructor)(struct neighbour *);
struct neigh_table *tbl;
void *sysctl_table;
@@ -145,7 +146,6 @@ struct neighbour
struct neigh_ops
{
int family;
void (*destructor)(struct neighbour *);
void (*solicit)(struct neighbour *, struct sk_buff*);
void (*error_report)(struct neighbour *, struct sk_buff*);
int (*output)(struct sk_buff*);