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switchdev: remove pointers from switchdev objects 

When object is used in deferred work, we cannot use pointers in
switchdev object structures because the memory they point at may be already
used by someone else. So rather do local copy of the value.

Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Acked-by: Scott Feldman <sfeldma@gmail.com>
Reviewed-by: John Fastabend <john.r.fastabend@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jiri Pirko 2015-10-14 19:40:51 +02:00 committed by David S. Miller
parent 0bc05d585d
commit 850d0cbc91
5 changed files with 15 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
drivers/net/ethernet/rocker/rocker.c
View File

@ -4469,7 +4469,7 @@ static int rocker_port_obj_add(struct net_device *dev,
fib4 = SWITCHDEV_OBJ_IPV4_FIB(obj);
err = rocker_port_fib_ipv4(rocker_port, trans,
htonl(fib4->dst), fib4->dst_len,
fib4->fi, fib4->tb_id, 0);
&fib4->fi, fib4->tb_id, 0);
break;
case SWITCHDEV_OBJ_ID_PORT_FDB:
err = rocker_port_fdb_add(rocker_port, trans,
@ -4541,7 +4541,7 @@ static int rocker_port_obj_del(struct net_device *dev,
fib4 = SWITCHDEV_OBJ_IPV4_FIB(obj);
err = rocker_port_fib_ipv4(rocker_port, NULL,
htonl(fib4->dst), fib4->dst_len,
fib4->fi, fib4->tb_id,
&fib4->fi, fib4->tb_id,
ROCKER_OP_FLAG_REMOVE);
break;
case SWITCHDEV_OBJ_ID_PORT_FDB:
@ -4571,7 +4571,7 @@ static int rocker_port_fdb_dump(const struct rocker_port *rocker_port,
hash_for_each_safe(rocker->fdb_tbl, bkt, tmp, found, entry) {
if (found->key.rocker_port != rocker_port)
continue;
fdb->addr = found->key.addr;
ether_addr_copy(fdb->addr, found->key.addr);
fdb->ndm_state = NUD_REACHABLE;
fdb->vid = rocker_port_vlan_to_vid(rocker_port,
found->key.vlan_id);

7
include/net/switchdev.h
View File

@ -14,6 +14,7 @@
#include <linux/netdevice.h>
#include <linux/notifier.h>
#include <linux/list.h>
#include <net/ip_fib.h>
#define SWITCHDEV_F_NO_RECURSE BIT(0)
#define SWITCHDEV_F_SKIP_EOPNOTSUPP BIT(1)
@ -59,8 +60,6 @@ struct switchdev_attr {
} u;
};
struct fib_info;
enum switchdev_obj_id {
SWITCHDEV_OBJ_ID_UNDEFINED,
SWITCHDEV_OBJ_ID_PORT_VLAN,
@ -88,7 +87,7 @@ struct switchdev_obj_ipv4_fib {
struct switchdev_obj obj;
u32 dst;
int dst_len;
struct fib_info *fi;
struct fib_info fi;
u8 tos;
u8 type;
u32 nlflags;
@ -101,7 +100,7 @@ struct switchdev_obj_ipv4_fib {
/* SWITCHDEV_OBJ_ID_PORT_FDB */
struct switchdev_obj_port_fdb {
struct switchdev_obj obj;
const unsigned char *addr;
unsigned char addr[ETH_ALEN];
u16 vid;
u16 ndm_state;
};

2
net/bridge/br_fdb.c
View File

@ -135,10 +135,10 @@ static void fdb_del_external_learn(struct net_bridge_fdb_entry *f)
{
struct switchdev_obj_port_fdb fdb = {
.obj.id = SWITCHDEV_OBJ_ID_PORT_FDB,
.addr = f->addr.addr,
.vid = f->vlan_id,
};
ether_addr_copy(fdb.addr, f->addr.addr);
switchdev_port_obj_del(f->dst->dev, &fdb.obj);
}

2
net/dsa/slave.c
View File

@ -393,7 +393,7 @@ static int dsa_slave_port_fdb_dump(struct net_device *dev,
if (ret < 0)
break;
fdb->addr = addr;
ether_addr_copy(fdb->addr, addr);
fdb->vid = vid;
fdb->ndm_state = is_static ? NUD_NOARP : NUD_REACHABLE;

11
net/switchdev/switchdev.c
View File

@ -15,6 +15,7 @@
#include <linux/mutex.h>
#include <linux/notifier.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/if_bridge.h>
#include <linux/list.h>
#include <linux/workqueue.h>
@ -891,10 +892,10 @@ int switchdev_port_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
{
struct switchdev_obj_port_fdb fdb = {
.obj.id = SWITCHDEV_OBJ_ID_PORT_FDB,
.addr = addr,
.vid = vid,
};
ether_addr_copy(fdb.addr, addr);
return switchdev_port_obj_add(dev, &fdb.obj);
}
EXPORT_SYMBOL_GPL(switchdev_port_fdb_add);
@ -916,10 +917,10 @@ int switchdev_port_fdb_del(struct ndmsg *ndm, struct nlattr *tb[],
{
struct switchdev_obj_port_fdb fdb = {
.obj.id = SWITCHDEV_OBJ_ID_PORT_FDB,
.addr = addr,
.vid = vid,
};
ether_addr_copy(fdb.addr, addr);
return switchdev_port_obj_del(dev, &fdb.obj);
}
EXPORT_SYMBOL_GPL(switchdev_port_fdb_del);
@ -1081,7 +1082,6 @@ int switchdev_fib_ipv4_add(u32 dst, int dst_len, struct fib_info *fi,
.obj.id = SWITCHDEV_OBJ_ID_IPV4_FIB,
.dst = dst,
.dst_len = dst_len,
.fi = fi,
.tos = tos,
.type = type,
.nlflags = nlflags,
@ -1090,6 +1090,8 @@ int switchdev_fib_ipv4_add(u32 dst, int dst_len, struct fib_info *fi,
struct net_device *dev;
int err = 0;
memcpy(&ipv4_fib.fi, fi, sizeof(ipv4_fib.fi));
/* Don't offload route if using custom ip rules or if
* IPv4 FIB offloading has been disabled completely.
*/
@ -1133,7 +1135,6 @@ int switchdev_fib_ipv4_del(u32 dst, int dst_len, struct fib_info *fi,
.obj.id = SWITCHDEV_OBJ_ID_IPV4_FIB,
.dst = dst,
.dst_len = dst_len,
.fi = fi,
.tos = tos,
.type = type,
.nlflags = 0,
@ -1142,6 +1143,8 @@ int switchdev_fib_ipv4_del(u32 dst, int dst_len, struct fib_info *fi,
struct net_device *dev;
int err = 0;
memcpy(&ipv4_fib.fi, fi, sizeof(ipv4_fib.fi));
if (!(fi->fib_flags & RTNH_F_OFFLOAD))
return 0;