* It is safe to access the datapath and vport structures with just
* dp_mutex.
*/
-static struct datapath *dps[ODP_MAX];
+static struct datapath __rcu *dps[ODP_MAX];
static DEFINE_MUTEX(dp_mutex);
static int new_vport(struct datapath *, struct odp_port *, int port_no);
{
if (dp_idx < 0 || dp_idx >= ODP_MAX)
return NULL;
- return rcu_dereference(dps[dp_idx]);
+ return rcu_dereference_check(dps[dp_idx], rcu_read_lock_held() ||
+ lockdep_is_held(&dp_mutex));
}
EXPORT_SYMBOL_GPL(get_dp);
return dp;
}
+static struct tbl *get_table_protected(struct datapath *dp)
+{
+ return rcu_dereference_protected(dp->table, lockdep_is_held(&dp->mutex));
+}
+
/* Must be called with rcu_read_lock or RTNL lock. */
const char *dp_name(const struct datapath *dp)
{
- return vport_get_name(dp->ports[ODPP_LOCAL]);
+ return vport_get_name(rcu_dereference_rtnl(dp->ports[ODPP_LOCAL]));
}
static inline size_t br_nlmsg_size(void)
hdr->ifi_change = 0;
NLA_PUT_STRING(skb, IFLA_IFNAME, vport_get_name(port));
- NLA_PUT_U32(skb, IFLA_MASTER, vport_get_ifindex(dp->ports[ODPP_LOCAL]));
+ NLA_PUT_U32(skb, IFLA_MASTER,
+ vport_get_ifindex(rtnl_dereference(dp->ports[ODPP_LOCAL])));
NLA_PUT_U32(skb, IFLA_MTU, vport_get_mtu(port));
#ifdef IFLA_OPERSTATE
NLA_PUT_U8(skb, IFLA_OPERSTATE,
/* Allocate table. */
err = -ENOMEM;
- rcu_assign_pointer(dp->table, tbl_create(0));
+ rcu_assign_pointer(dp->table, tbl_create(TBL_MIN_BUCKETS));
if (!dp->table)
goto err_free_dp;
dp->drop_frags = 0;
dp->stats_percpu = alloc_percpu(struct dp_stats_percpu);
- if (!dp->stats_percpu)
+ if (!dp->stats_percpu) {
+ err = -ENOMEM;
goto err_destroy_local_port;
+ }
rcu_assign_pointer(dps[dp_idx], dp);
dp_sysfs_add_dp(dp);
flow_node = tbl_lookup(rcu_dereference(dp->table), &key,
flow_hash(&key), flow_cmp);
if (unlikely(!flow_node)) {
- dp_output_control(dp, skb, _ODPL_MISS_NR, OVS_CB(skb)->tun_id);
+ dp_output_control(dp, skb, _ODPL_MISS_NR,
+ (__force u64)OVS_CB(skb)->tun_id);
stats_counter_off = offsetof(struct dp_stats_percpu, n_missed);
goto out;
}
OVS_CB(skb)->flow = flow_cast(flow_node);
}
+ stats_counter_off = offsetof(struct dp_stats_percpu, n_hit);
flow_used(OVS_CB(skb)->flow, skb);
acts = rcu_dereference(OVS_CB(skb)->flow->sf_acts);
loop->looping = true;
if (unlikely(loop->looping)) {
loop_suppress(dp, acts);
+ kfree_skb(skb);
goto out_loop;
}
/* Execute actions. */
execute_actions(dp, skb, &OVS_CB(skb)->flow->key, acts->actions,
acts->actions_len);
- stats_counter_off = offsetof(struct dp_stats_percpu, n_hit);
/* Check whether sub-actions looped too much. */
if (unlikely(loop->looping))
kfree_skb(skb);
skb = nskb;
- if (unlikely(IS_ERR(skb))) {
+ if (IS_ERR(skb)) {
err = PTR_ERR(skb);
goto err;
}
static int flush_flows(struct datapath *dp)
{
- struct tbl *old_table = rcu_dereference(dp->table);
+ struct tbl *old_table = get_table_protected(dp);
struct tbl *new_table;
- new_table = tbl_create(0);
+ new_table = tbl_create(TBL_MIN_BUCKETS);
if (!new_table)
return -ENOMEM;
goto error;
error = -EFAULT;
- if (copy_from_user(actions->actions, flow->actions, flow->actions_len))
+ if (copy_from_user(actions->actions,
+ (struct nlattr __user __force *)flow->actions,
+ flow->actions_len))
goto error_free_actions;
error = validate_actions(actions->actions, actions->actions_len);
if (error)
static int expand_table(struct datapath *dp)
{
- struct tbl *old_table = rcu_dereference(dp->table);
+ struct tbl *old_table = get_table_protected(dp);
struct tbl *new_table;
new_table = tbl_expand(old_table);
struct sw_flow *flow;
struct tbl *table;
int error;
+ u32 hash;
- table = rcu_dereference(dp->table);
- flow_node = tbl_lookup(table, &uf->flow.key, flow_hash(&uf->flow.key), flow_cmp);
+ hash = flow_hash(&uf->flow.key);
+ table = get_table_protected(dp);
+ flow_node = tbl_lookup(table, &uf->flow.key, hash, flow_cmp);
if (!flow_node) {
/* No such flow. */
struct sw_flow_actions *acts;
error = expand_table(dp);
if (error)
goto error;
- table = rcu_dereference(dp->table);
+ table = get_table_protected(dp);
}
/* Allocate flow. */
rcu_assign_pointer(flow->sf_acts, acts);
/* Put flow in bucket. */
- error = tbl_insert(table, &flow->tbl_node, flow_hash(&flow->key));
+ error = tbl_insert(table, &flow->tbl_node, hash);
if (error)
goto error_free_flow_acts;
error = PTR_ERR(new_acts);
if (IS_ERR(new_acts))
goto error;
- old_acts = rcu_dereference(flow->sf_acts);
+
+ old_acts = rcu_dereference_protected(flow->sf_acts,
+ lockdep_is_held(&dp->mutex));
if (old_acts->actions_len != new_acts->actions_len ||
memcmp(old_acts->actions, new_acts->actions,
old_acts->actions_len)) {
return 0;
}
-static int do_answer_query(struct sw_flow *flow, u32 query_flags,
+static int do_answer_query(struct datapath *dp, struct sw_flow *flow,
+ u32 query_flags,
struct odp_flow_stats __user *ustats,
struct nlattr __user *actions,
u32 __user *actions_lenp)
if (!actions_len)
return 0;
- sf_acts = rcu_dereference(flow->sf_acts);
+ sf_acts = rcu_dereference_protected(flow->sf_acts,
+ lockdep_is_held(&dp->mutex));
if (put_user(sf_acts->actions_len, actions_lenp) ||
(actions && copy_to_user(actions, sf_acts->actions,
min(sf_acts->actions_len, actions_len))))
return 0;
}
-static int answer_query(struct sw_flow *flow, u32 query_flags,
- struct odp_flow __user *ufp)
+static int answer_query(struct datapath *dp, struct sw_flow *flow,
+ u32 query_flags, struct odp_flow __user *ufp)
{
- struct nlattr *actions;
+ struct nlattr __user *actions;
- if (get_user(actions, &ufp->actions))
+ if (get_user(actions, (struct nlattr __user * __user *)&ufp->actions))
return -EFAULT;
- return do_answer_query(flow, query_flags,
+ return do_answer_query(dp, flow, query_flags,
&ufp->stats, actions, &ufp->actions_len);
}
static struct sw_flow *do_del_flow(struct datapath *dp, struct odp_flow_key *key)
{
- struct tbl *table = rcu_dereference(dp->table);
+ struct tbl *table = get_table_protected(dp);
struct tbl_node *flow_node;
int error;
if (IS_ERR(flow))
return PTR_ERR(flow);
- error = answer_query(flow, 0, ufp);
+ error = answer_query(dp, flow, 0, ufp);
flow_deferred_free(flow);
return error;
}
static int do_query_flows(struct datapath *dp, const struct odp_flowvec *flowvec)
{
- struct tbl *table = rcu_dereference(dp->table);
+ struct tbl *table = get_table_protected(dp);
u32 i;
for (i = 0; i < flowvec->n_flows; i++) {
- struct odp_flow __user *ufp = &flowvec->flows[i];
+ struct odp_flow __user *ufp = (struct odp_flow __user __force *)&flowvec->flows[i];
struct odp_flow uf;
struct tbl_node *flow_node;
int error;
if (!flow_node)
error = put_user(ENOENT, &ufp->stats.error);
else
- error = answer_query(flow_cast(flow_node), uf.flags, ufp);
+ error = answer_query(dp, flow_cast(flow_node), uf.flags, ufp);
if (error)
return -EFAULT;
}
}
struct list_flows_cbdata {
+ struct datapath *dp;
struct odp_flow __user *uflows;
u32 n_flows;
u32 listed_flows;
if (copy_to_user(&ufp->key, &flow->key, sizeof flow->key))
return -EFAULT;
- error = answer_query(flow, 0, ufp);
+ error = answer_query(cbdata->dp, flow, 0, ufp);
if (error)
return error;
if (!flowvec->n_flows)
return 0;
- cbdata.uflows = flowvec->flows;
+ cbdata.dp = dp;
+ cbdata.uflows = (struct odp_flow __user __force*)flowvec->flows;
cbdata.n_flows = flowvec->n_flows;
cbdata.listed_flows = 0;
- error = tbl_foreach(rcu_dereference(dp->table), list_flow, &cbdata);
+ error = tbl_foreach(get_table_protected(dp), list_flow, &cbdata);
return error ? error : cbdata.listed_flows;
}
}
err = -EFAULT;
- if (copy_from_user(actions->actions, execute->actions, execute->actions_len))
+ if (copy_from_user(actions->actions,
+ (struct nlattr __user __force *)execute->actions, execute->actions_len))
goto error_free_actions;
err = validate_actions(actions->actions, execute->actions_len);
goto error_free_actions;
err = -EFAULT;
- if (copy_from_user(skb_put(skb, execute->length), execute->data,
+ if (copy_from_user(skb_put(skb, execute->length),
+ (const void __user __force *)execute->data,
execute->length))
goto error_free_skb;
static int get_dp_stats(struct datapath *dp, struct odp_stats __user *statsp)
{
- struct tbl *table = rcu_dereference(dp->table);
+ struct tbl *table = get_table_protected(dp);
struct odp_stats stats;
int i;
rcu_read_lock();
strncpy(op.devname, vport_get_name(p), sizeof op.devname);
strncpy(op.type, vport_get_type(p), sizeof op.type);
+ vport_get_config(p, op.config);
rcu_read_unlock();
op.port = p->port_no;
if (copy_from_user(&pv, upv, sizeof pv))
return -EFAULT;
- retval = do_list_ports(dp, pv.ports, pv.n_ports);
+ retval = do_list_ports(dp, (struct odp_port __user __force *)pv.ports,
+ pv.n_ports);
if (retval < 0)
return retval;
__get_user(flow->flags, &compat->flags))
return -EFAULT;
- flow->actions = compat_ptr(actions);
+ flow->actions = (struct nlattr __force *)compat_ptr(actions);
return 0;
}
return 0;
}
-static int compat_answer_query(struct sw_flow *flow, u32 query_flags,
+static int compat_answer_query(struct datapath *dp, struct sw_flow *flow,
+ u32 query_flags,
struct compat_odp_flow __user *ufp)
{
compat_uptr_t actions;
if (get_user(actions, &ufp->actions))
return -EFAULT;
- return do_answer_query(flow, query_flags, &ufp->stats,
+ return do_answer_query(dp, flow, query_flags, &ufp->stats,
compat_ptr(actions), &ufp->actions_len);
}
if (IS_ERR(flow))
return PTR_ERR(flow);
- error = compat_answer_query(flow, 0, ufp);
+ error = compat_answer_query(dp, flow, 0, ufp);
flow_deferred_free(flow);
return error;
}
-static int compat_query_flows(struct datapath *dp, struct compat_odp_flow *flows, u32 n_flows)
+static int compat_query_flows(struct datapath *dp,
+ struct compat_odp_flow __user *flows,
+ u32 n_flows)
{
- struct tbl *table = rcu_dereference(dp->table);
+ struct tbl *table = get_table_protected(dp);
u32 i;
for (i = 0; i < n_flows; i++) {
if (!flow_node)
error = put_user(ENOENT, &ufp->stats.error);
else
- error = compat_answer_query(flow_cast(flow_node), uf.flags, ufp);
+ error = compat_answer_query(dp, flow_cast(flow_node),
+ uf.flags, ufp);
if (error)
return -EFAULT;
}
}
struct compat_list_flows_cbdata {
+ struct datapath *dp;
struct compat_odp_flow __user *uflows;
u32 n_flows;
u32 listed_flows;
if (copy_to_user(&ufp->key, &flow->key, sizeof flow->key))
return -EFAULT;
- error = compat_answer_query(flow, 0, ufp);
+ error = compat_answer_query(cbdata->dp, flow, 0, ufp);
if (error)
return error;
return 0;
}
-static int compat_list_flows(struct datapath *dp, struct compat_odp_flow *flows, u32 n_flows)
+static int compat_list_flows(struct datapath *dp,
+ struct compat_odp_flow __user *flows, u32 n_flows)
{
struct compat_list_flows_cbdata cbdata;
int error;
if (!n_flows)
return 0;
+ cbdata.dp = dp;
cbdata.uflows = flows;
cbdata.n_flows = n_flows;
cbdata.listed_flows = 0;
- error = tbl_foreach(rcu_dereference(dp->table), compat_list_flow, &cbdata);
+ error = tbl_foreach(get_table_protected(dp), compat_list_flow, &cbdata);
return error ? error : cbdata.listed_flows;
}
static int compat_flowvec_ioctl(struct datapath *dp, unsigned long argp,
int (*function)(struct datapath *,
- struct compat_odp_flow *,
+ struct compat_odp_flow __user *,
u32 n_flows))
{
struct compat_odp_flowvec __user *uflowvec;
__get_user(execute.length, &uexecute->length))
return -EFAULT;
- execute.actions = compat_ptr(actions);
- execute.data = compat_ptr(data);
+ execute.actions = (struct nlattr __force *)compat_ptr(actions);
+ execute.data = (const void __force *)compat_ptr(data);
return do_execute(dp, &execute);
}
u16 csum_start, csum_offset;
get_skb_csum_pointers(skb, &csum_start, &csum_offset);
+ csum_start -= skb_headroom(skb);
+
BUG_ON(csum_start >= skb_headlen(skb));
retval = skb_copy_and_csum_datagram(skb, csum_start, buf + csum_start,
copy_bytes - csum_start, &csum);
copy_bytes = csum_start;
csump = (__sum16 __user *)(buf + csum_start + csum_offset);
- BUG_ON((char *)csump + sizeof(__sum16) > buf + nbytes);
+ BUG_ON((char __user *)csump + sizeof(__sum16) >
+ buf + nbytes);
put_user(csum_fold(csum), csump);
}
} else
}
if (!retval) {
- struct iovec __user iov;
+ struct iovec iov;
iov.iov_base = buf;
iov.iov_len = copy_bytes;
projects / openvswitch / blobdiff