mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-22 16:18:51 +07:00
c1a970d06f
After recent refactoring of block offlads infrastructure, indr_dev->block
pointer is dereferenced before it is verified to be non-NULL. Example stack
trace where this behavior leads to NULL-pointer dereference error when
creating vxlan dev on system with mlx5 NIC with offloads enabled:
[ 1157.852938] ==================================================================
[ 1157.866877] BUG: KASAN: null-ptr-deref in tc_indr_block_ing_cmd.isra.41+0x9c/0x160
[ 1157.880877] Read of size 4 at addr 0000000000000090 by task ip/3829
[ 1157.901637] CPU: 22 PID: 3829 Comm: ip Not tainted 5.2.0-rc6+ #488
[ 1157.914438] Hardware name: Supermicro SYS-2028TP-DECR/X10DRT-P, BIOS 2.0b 03/30/2017
[ 1157.929031] Call Trace:
[ 1157.938318] dump_stack+0x9a/0xeb
[ 1157.948362] ? tc_indr_block_ing_cmd.isra.41+0x9c/0x160
[ 1157.960262] ? tc_indr_block_ing_cmd.isra.41+0x9c/0x160
[ 1157.972082] __kasan_report+0x176/0x192
[ 1157.982513] ? tc_indr_block_ing_cmd.isra.41+0x9c/0x160
[ 1157.994348] kasan_report+0xe/0x20
[ 1158.004324] tc_indr_block_ing_cmd.isra.41+0x9c/0x160
[ 1158.015950] ? tcf_block_setup+0x430/0x430
[ 1158.026558] ? kasan_unpoison_shadow+0x30/0x40
[ 1158.037464] __tc_indr_block_cb_register+0x5f5/0xf20
[ 1158.049288] ? mlx5e_rep_indr_tc_block_unbind+0xa0/0xa0 [mlx5_core]
[ 1158.062344] ? tc_indr_block_dev_put.part.47+0x5c0/0x5c0
[ 1158.074498] ? rdma_roce_rescan_device+0x20/0x20 [ib_core]
[ 1158.086580] ? br_device_event+0x98/0x480 [bridge]
[ 1158.097870] ? strcmp+0x30/0x50
[ 1158.107578] mlx5e_nic_rep_netdevice_event+0xdd/0x180 [mlx5_core]
[ 1158.120212] notifier_call_chain+0x6d/0xa0
[ 1158.130753] register_netdevice+0x6fc/0x7e0
[ 1158.141322] ? netdev_change_features+0xa0/0xa0
[ 1158.152218] ? vxlan_config_apply+0x210/0x310 [vxlan]
[ 1158.163593] __vxlan_dev_create+0x2ad/0x520 [vxlan]
[ 1158.174770] ? vxlan_changelink+0x490/0x490 [vxlan]
[ 1158.185870] ? rcu_read_unlock+0x60/0x60 [vxlan]
[ 1158.196798] vxlan_newlink+0x99/0xf0 [vxlan]
[ 1158.207303] ? __vxlan_dev_create+0x520/0x520 [vxlan]
[ 1158.218601] ? rtnl_create_link+0x3d0/0x450
[ 1158.228900] __rtnl_newlink+0x8a7/0xb00
[ 1158.238701] ? stack_access_ok+0x35/0x80
[ 1158.248450] ? rtnl_link_unregister+0x1a0/0x1a0
[ 1158.258735] ? find_held_lock+0x6d/0xd0
[ 1158.268379] ? is_bpf_text_address+0x67/0xf0
[ 1158.278330] ? lock_acquire+0xc1/0x1f0
[ 1158.287686] ? is_bpf_text_address+0x5/0xf0
[ 1158.297449] ? is_bpf_text_address+0x86/0xf0
[ 1158.307310] ? kernel_text_address+0xec/0x100
[ 1158.317155] ? arch_stack_walk+0x92/0xe0
[ 1158.326497] ? __kernel_text_address+0xe/0x30
[ 1158.336213] ? unwind_get_return_address+0x2f/0x50
[ 1158.346267] ? create_prof_cpu_mask+0x20/0x20
[ 1158.355936] ? arch_stack_walk+0x92/0xe0
[ 1158.365117] ? stack_trace_save+0x8a/0xb0
[ 1158.374272] ? stack_trace_consume_entry+0x80/0x80
[ 1158.384226] ? match_held_lock+0x33/0x210
[ 1158.393216] ? kasan_unpoison_shadow+0x30/0x40
[ 1158.402593] rtnl_newlink+0x53/0x80
[ 1158.410925] rtnetlink_rcv_msg+0x3a5/0x600
[ 1158.419777] ? validate_linkmsg+0x400/0x400
[ 1158.428620] ? find_held_lock+0x6d/0xd0
[ 1158.437117] ? match_held_lock+0x1b/0x210
[ 1158.445760] ? validate_linkmsg+0x400/0x400
[ 1158.454642] netlink_rcv_skb+0xc7/0x1f0
[ 1158.463150] ? netlink_ack+0x470/0x470
[ 1158.471538] ? netlink_deliver_tap+0x1f3/0x5a0
[ 1158.480607] netlink_unicast+0x2ae/0x350
[ 1158.489099] ? netlink_attachskb+0x340/0x340
[ 1158.497935] ? _copy_from_iter_full+0xde/0x3b0
[ 1158.506945] ? __virt_addr_valid+0xb6/0xf0
[ 1158.515578] ? __check_object_size+0x159/0x240
[ 1158.524515] netlink_sendmsg+0x4d3/0x630
[ 1158.532879] ? netlink_unicast+0x350/0x350
[ 1158.541400] ? netlink_unicast+0x350/0x350
[ 1158.549805] sock_sendmsg+0x94/0xa0
[ 1158.557561] ___sys_sendmsg+0x49d/0x570
[ 1158.565625] ? copy_msghdr_from_user+0x210/0x210
[ 1158.574457] ? __fput+0x1e2/0x330
[ 1158.581948] ? __kasan_slab_free+0x130/0x180
[ 1158.590407] ? kmem_cache_free+0xb6/0x2d0
[ 1158.598574] ? mark_lock+0xc7/0x790
[ 1158.606177] ? task_work_run+0xcf/0x100
[ 1158.614165] ? exit_to_usermode_loop+0x102/0x110
[ 1158.622954] ? __lock_acquire+0x963/0x1ee0
[ 1158.631199] ? lockdep_hardirqs_on+0x260/0x260
[ 1158.639777] ? match_held_lock+0x1b/0x210
[ 1158.647918] ? lockdep_hardirqs_on+0x260/0x260
[ 1158.656501] ? match_held_lock+0x1b/0x210
[ 1158.664643] ? __fget_light+0xa6/0xe0
[ 1158.672423] ? __sys_sendmsg+0xd2/0x150
[ 1158.680334] __sys_sendmsg+0xd2/0x150
[ 1158.688063] ? __ia32_sys_shutdown+0x30/0x30
[ 1158.696435] ? lock_downgrade+0x2e0/0x2e0
[ 1158.704541] ? mark_held_locks+0x1a/0x90
[ 1158.712611] ? mark_held_locks+0x1a/0x90
[ 1158.720619] ? do_syscall_64+0x1e/0x2c0
[ 1158.728530] do_syscall_64+0x78/0x2c0
[ 1158.736254] entry_SYSCALL_64_after_hwframe+0x49/0xbe
[ 1158.745414] RIP: 0033:0x7f62d505cb87
[ 1158.753070] Code: 64 89 02 48 c7 c0 ff ff ff ff eb b9 0f 1f 80 00 00 00 00 8b 05 6a 2b 2c 00 48 63 d2 48 63 ff 85 c0 75 18 b8 2e 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 59 f3 c3 0f 1f 80 00 00[87/1817]
48 89 f3 48
[ 1158.780924] RSP: 002b:00007fffd9832268 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[ 1158.793204] RAX: ffffffffffffffda RBX: 000000005d26048f RCX: 00007f62d505cb87
[ 1158.805111] RDX: 0000000000000000 RSI: 00007fffd98322d0 RDI: 0000000000000003
[ 1158.817055] RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000006
[ 1158.828987] R10: 00007f62d50ce260 R11: 0000000000000246 R12: 0000000000000001
[ 1158.840909] R13: 000000000067e540 R14: 0000000000000000 R15: 000000000067ed20
[ 1158.852873] ==================================================================
Introduce new function tcf_block_non_null_shared() that verifies block
pointer before dereferencing it to obtain index. Use the function in
tc_indr_block_ing_cmd() to prevent NULL pointer dereference.
Fixes: 955bcb6ea0
("drivers: net: use flow block API")
Signed-off-by: Vlad Buslov <vladbu@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
847 lines
20 KiB
C
847 lines
20 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef __NET_PKT_CLS_H
|
|
#define __NET_PKT_CLS_H
|
|
|
|
#include <linux/pkt_cls.h>
|
|
#include <linux/workqueue.h>
|
|
#include <net/sch_generic.h>
|
|
#include <net/act_api.h>
|
|
#include <net/flow_offload.h>
|
|
#include <net/net_namespace.h>
|
|
|
|
/* TC action not accessible from user space */
|
|
#define TC_ACT_CONSUMED (TC_ACT_VALUE_MAX + 1)
|
|
|
|
/* Basic packet classifier frontend definitions. */
|
|
|
|
struct tcf_walker {
|
|
int stop;
|
|
int skip;
|
|
int count;
|
|
bool nonempty;
|
|
unsigned long cookie;
|
|
int (*fn)(struct tcf_proto *, void *node, struct tcf_walker *);
|
|
};
|
|
|
|
int register_tcf_proto_ops(struct tcf_proto_ops *ops);
|
|
int unregister_tcf_proto_ops(struct tcf_proto_ops *ops);
|
|
|
|
struct tcf_block_ext_info {
|
|
enum flow_block_binder_type binder_type;
|
|
tcf_chain_head_change_t *chain_head_change;
|
|
void *chain_head_change_priv;
|
|
u32 block_index;
|
|
};
|
|
|
|
struct tcf_block_cb;
|
|
bool tcf_queue_work(struct rcu_work *rwork, work_func_t func);
|
|
|
|
#ifdef CONFIG_NET_CLS
|
|
struct tcf_chain *tcf_chain_get_by_act(struct tcf_block *block,
|
|
u32 chain_index);
|
|
void tcf_chain_put_by_act(struct tcf_chain *chain);
|
|
struct tcf_chain *tcf_get_next_chain(struct tcf_block *block,
|
|
struct tcf_chain *chain);
|
|
struct tcf_proto *tcf_get_next_proto(struct tcf_chain *chain,
|
|
struct tcf_proto *tp, bool rtnl_held);
|
|
void tcf_block_netif_keep_dst(struct tcf_block *block);
|
|
int tcf_block_get(struct tcf_block **p_block,
|
|
struct tcf_proto __rcu **p_filter_chain, struct Qdisc *q,
|
|
struct netlink_ext_ack *extack);
|
|
int tcf_block_get_ext(struct tcf_block **p_block, struct Qdisc *q,
|
|
struct tcf_block_ext_info *ei,
|
|
struct netlink_ext_ack *extack);
|
|
void tcf_block_put(struct tcf_block *block);
|
|
void tcf_block_put_ext(struct tcf_block *block, struct Qdisc *q,
|
|
struct tcf_block_ext_info *ei);
|
|
|
|
static inline bool tcf_block_shared(struct tcf_block *block)
|
|
{
|
|
return block->index;
|
|
}
|
|
|
|
static inline bool tcf_block_non_null_shared(struct tcf_block *block)
|
|
{
|
|
return block && block->index;
|
|
}
|
|
|
|
static inline struct Qdisc *tcf_block_q(struct tcf_block *block)
|
|
{
|
|
WARN_ON(tcf_block_shared(block));
|
|
return block->q;
|
|
}
|
|
|
|
int __tc_indr_block_cb_register(struct net_device *dev, void *cb_priv,
|
|
tc_indr_block_bind_cb_t *cb, void *cb_ident);
|
|
int tc_indr_block_cb_register(struct net_device *dev, void *cb_priv,
|
|
tc_indr_block_bind_cb_t *cb, void *cb_ident);
|
|
void __tc_indr_block_cb_unregister(struct net_device *dev,
|
|
tc_indr_block_bind_cb_t *cb, void *cb_ident);
|
|
void tc_indr_block_cb_unregister(struct net_device *dev,
|
|
tc_indr_block_bind_cb_t *cb, void *cb_ident);
|
|
|
|
int tcf_classify(struct sk_buff *skb, const struct tcf_proto *tp,
|
|
struct tcf_result *res, bool compat_mode);
|
|
|
|
#else
|
|
static inline bool tcf_block_shared(struct tcf_block *block)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
static inline bool tcf_block_non_null_shared(struct tcf_block *block)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
static inline
|
|
int tcf_block_get(struct tcf_block **p_block,
|
|
struct tcf_proto __rcu **p_filter_chain, struct Qdisc *q,
|
|
struct netlink_ext_ack *extack)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline
|
|
int tcf_block_get_ext(struct tcf_block **p_block, struct Qdisc *q,
|
|
struct tcf_block_ext_info *ei,
|
|
struct netlink_ext_ack *extack)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline void tcf_block_put(struct tcf_block *block)
|
|
{
|
|
}
|
|
|
|
static inline
|
|
void tcf_block_put_ext(struct tcf_block *block, struct Qdisc *q,
|
|
struct tcf_block_ext_info *ei)
|
|
{
|
|
}
|
|
|
|
static inline struct Qdisc *tcf_block_q(struct tcf_block *block)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static inline
|
|
int tc_setup_cb_block_register(struct tcf_block *block, tc_setup_cb_t *cb,
|
|
void *cb_priv)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline
|
|
void tc_setup_cb_block_unregister(struct tcf_block *block, tc_setup_cb_t *cb,
|
|
void *cb_priv)
|
|
{
|
|
}
|
|
|
|
static inline
|
|
int __tc_indr_block_cb_register(struct net_device *dev, void *cb_priv,
|
|
tc_indr_block_bind_cb_t *cb, void *cb_ident)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline
|
|
int tc_indr_block_cb_register(struct net_device *dev, void *cb_priv,
|
|
tc_indr_block_bind_cb_t *cb, void *cb_ident)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline
|
|
void __tc_indr_block_cb_unregister(struct net_device *dev,
|
|
tc_indr_block_bind_cb_t *cb, void *cb_ident)
|
|
{
|
|
}
|
|
|
|
static inline
|
|
void tc_indr_block_cb_unregister(struct net_device *dev,
|
|
tc_indr_block_bind_cb_t *cb, void *cb_ident)
|
|
{
|
|
}
|
|
|
|
static inline int tcf_classify(struct sk_buff *skb, const struct tcf_proto *tp,
|
|
struct tcf_result *res, bool compat_mode)
|
|
{
|
|
return TC_ACT_UNSPEC;
|
|
}
|
|
#endif
|
|
|
|
static inline unsigned long
|
|
__cls_set_class(unsigned long *clp, unsigned long cl)
|
|
{
|
|
return xchg(clp, cl);
|
|
}
|
|
|
|
static inline unsigned long
|
|
cls_set_class(struct Qdisc *q, unsigned long *clp, unsigned long cl)
|
|
{
|
|
unsigned long old_cl;
|
|
|
|
sch_tree_lock(q);
|
|
old_cl = __cls_set_class(clp, cl);
|
|
sch_tree_unlock(q);
|
|
return old_cl;
|
|
}
|
|
|
|
static inline void
|
|
tcf_bind_filter(struct tcf_proto *tp, struct tcf_result *r, unsigned long base)
|
|
{
|
|
struct Qdisc *q = tp->chain->block->q;
|
|
unsigned long cl;
|
|
|
|
/* Check q as it is not set for shared blocks. In that case,
|
|
* setting class is not supported.
|
|
*/
|
|
if (!q)
|
|
return;
|
|
cl = q->ops->cl_ops->bind_tcf(q, base, r->classid);
|
|
cl = cls_set_class(q, &r->class, cl);
|
|
if (cl)
|
|
q->ops->cl_ops->unbind_tcf(q, cl);
|
|
}
|
|
|
|
static inline void
|
|
tcf_unbind_filter(struct tcf_proto *tp, struct tcf_result *r)
|
|
{
|
|
struct Qdisc *q = tp->chain->block->q;
|
|
unsigned long cl;
|
|
|
|
if (!q)
|
|
return;
|
|
if ((cl = __cls_set_class(&r->class, 0)) != 0)
|
|
q->ops->cl_ops->unbind_tcf(q, cl);
|
|
}
|
|
|
|
struct tcf_exts {
|
|
#ifdef CONFIG_NET_CLS_ACT
|
|
__u32 type; /* for backward compat(TCA_OLD_COMPAT) */
|
|
int nr_actions;
|
|
struct tc_action **actions;
|
|
struct net *net;
|
|
#endif
|
|
/* Map to export classifier specific extension TLV types to the
|
|
* generic extensions API. Unsupported extensions must be set to 0.
|
|
*/
|
|
int action;
|
|
int police;
|
|
};
|
|
|
|
static inline int tcf_exts_init(struct tcf_exts *exts, struct net *net,
|
|
int action, int police)
|
|
{
|
|
#ifdef CONFIG_NET_CLS_ACT
|
|
exts->type = 0;
|
|
exts->nr_actions = 0;
|
|
exts->net = net;
|
|
exts->actions = kcalloc(TCA_ACT_MAX_PRIO, sizeof(struct tc_action *),
|
|
GFP_KERNEL);
|
|
if (!exts->actions)
|
|
return -ENOMEM;
|
|
#endif
|
|
exts->action = action;
|
|
exts->police = police;
|
|
return 0;
|
|
}
|
|
|
|
/* Return false if the netns is being destroyed in cleanup_net(). Callers
|
|
* need to do cleanup synchronously in this case, otherwise may race with
|
|
* tc_action_net_exit(). Return true for other cases.
|
|
*/
|
|
static inline bool tcf_exts_get_net(struct tcf_exts *exts)
|
|
{
|
|
#ifdef CONFIG_NET_CLS_ACT
|
|
exts->net = maybe_get_net(exts->net);
|
|
return exts->net != NULL;
|
|
#else
|
|
return true;
|
|
#endif
|
|
}
|
|
|
|
static inline void tcf_exts_put_net(struct tcf_exts *exts)
|
|
{
|
|
#ifdef CONFIG_NET_CLS_ACT
|
|
if (exts->net)
|
|
put_net(exts->net);
|
|
#endif
|
|
}
|
|
|
|
#ifdef CONFIG_NET_CLS_ACT
|
|
#define tcf_exts_for_each_action(i, a, exts) \
|
|
for (i = 0; i < TCA_ACT_MAX_PRIO && ((a) = (exts)->actions[i]); i++)
|
|
#else
|
|
#define tcf_exts_for_each_action(i, a, exts) \
|
|
for (; 0; (void)(i), (void)(a), (void)(exts))
|
|
#endif
|
|
|
|
static inline void
|
|
tcf_exts_stats_update(const struct tcf_exts *exts,
|
|
u64 bytes, u64 packets, u64 lastuse)
|
|
{
|
|
#ifdef CONFIG_NET_CLS_ACT
|
|
int i;
|
|
|
|
preempt_disable();
|
|
|
|
for (i = 0; i < exts->nr_actions; i++) {
|
|
struct tc_action *a = exts->actions[i];
|
|
|
|
tcf_action_stats_update(a, bytes, packets, lastuse, true);
|
|
}
|
|
|
|
preempt_enable();
|
|
#endif
|
|
}
|
|
|
|
/**
|
|
* tcf_exts_has_actions - check if at least one action is present
|
|
* @exts: tc filter extensions handle
|
|
*
|
|
* Returns true if at least one action is present.
|
|
*/
|
|
static inline bool tcf_exts_has_actions(struct tcf_exts *exts)
|
|
{
|
|
#ifdef CONFIG_NET_CLS_ACT
|
|
return exts->nr_actions;
|
|
#else
|
|
return false;
|
|
#endif
|
|
}
|
|
|
|
/**
|
|
* tcf_exts_exec - execute tc filter extensions
|
|
* @skb: socket buffer
|
|
* @exts: tc filter extensions handle
|
|
* @res: desired result
|
|
*
|
|
* Executes all configured extensions. Returns TC_ACT_OK on a normal execution,
|
|
* a negative number if the filter must be considered unmatched or
|
|
* a positive action code (TC_ACT_*) which must be returned to the
|
|
* underlying layer.
|
|
*/
|
|
static inline int
|
|
tcf_exts_exec(struct sk_buff *skb, struct tcf_exts *exts,
|
|
struct tcf_result *res)
|
|
{
|
|
#ifdef CONFIG_NET_CLS_ACT
|
|
return tcf_action_exec(skb, exts->actions, exts->nr_actions, res);
|
|
#endif
|
|
return TC_ACT_OK;
|
|
}
|
|
|
|
int tcf_exts_validate(struct net *net, struct tcf_proto *tp,
|
|
struct nlattr **tb, struct nlattr *rate_tlv,
|
|
struct tcf_exts *exts, bool ovr, bool rtnl_held,
|
|
struct netlink_ext_ack *extack);
|
|
void tcf_exts_destroy(struct tcf_exts *exts);
|
|
void tcf_exts_change(struct tcf_exts *dst, struct tcf_exts *src);
|
|
int tcf_exts_dump(struct sk_buff *skb, struct tcf_exts *exts);
|
|
int tcf_exts_dump_stats(struct sk_buff *skb, struct tcf_exts *exts);
|
|
|
|
/**
|
|
* struct tcf_pkt_info - packet information
|
|
*/
|
|
struct tcf_pkt_info {
|
|
unsigned char * ptr;
|
|
int nexthdr;
|
|
};
|
|
|
|
#ifdef CONFIG_NET_EMATCH
|
|
|
|
struct tcf_ematch_ops;
|
|
|
|
/**
|
|
* struct tcf_ematch - extended match (ematch)
|
|
*
|
|
* @matchid: identifier to allow userspace to reidentify a match
|
|
* @flags: flags specifying attributes and the relation to other matches
|
|
* @ops: the operations lookup table of the corresponding ematch module
|
|
* @datalen: length of the ematch specific configuration data
|
|
* @data: ematch specific data
|
|
*/
|
|
struct tcf_ematch {
|
|
struct tcf_ematch_ops * ops;
|
|
unsigned long data;
|
|
unsigned int datalen;
|
|
u16 matchid;
|
|
u16 flags;
|
|
struct net *net;
|
|
};
|
|
|
|
static inline int tcf_em_is_container(struct tcf_ematch *em)
|
|
{
|
|
return !em->ops;
|
|
}
|
|
|
|
static inline int tcf_em_is_simple(struct tcf_ematch *em)
|
|
{
|
|
return em->flags & TCF_EM_SIMPLE;
|
|
}
|
|
|
|
static inline int tcf_em_is_inverted(struct tcf_ematch *em)
|
|
{
|
|
return em->flags & TCF_EM_INVERT;
|
|
}
|
|
|
|
static inline int tcf_em_last_match(struct tcf_ematch *em)
|
|
{
|
|
return (em->flags & TCF_EM_REL_MASK) == TCF_EM_REL_END;
|
|
}
|
|
|
|
static inline int tcf_em_early_end(struct tcf_ematch *em, int result)
|
|
{
|
|
if (tcf_em_last_match(em))
|
|
return 1;
|
|
|
|
if (result == 0 && em->flags & TCF_EM_REL_AND)
|
|
return 1;
|
|
|
|
if (result != 0 && em->flags & TCF_EM_REL_OR)
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* struct tcf_ematch_tree - ematch tree handle
|
|
*
|
|
* @hdr: ematch tree header supplied by userspace
|
|
* @matches: array of ematches
|
|
*/
|
|
struct tcf_ematch_tree {
|
|
struct tcf_ematch_tree_hdr hdr;
|
|
struct tcf_ematch * matches;
|
|
|
|
};
|
|
|
|
/**
|
|
* struct tcf_ematch_ops - ematch module operations
|
|
*
|
|
* @kind: identifier (kind) of this ematch module
|
|
* @datalen: length of expected configuration data (optional)
|
|
* @change: called during validation (optional)
|
|
* @match: called during ematch tree evaluation, must return 1/0
|
|
* @destroy: called during destroyage (optional)
|
|
* @dump: called during dumping process (optional)
|
|
* @owner: owner, must be set to THIS_MODULE
|
|
* @link: link to previous/next ematch module (internal use)
|
|
*/
|
|
struct tcf_ematch_ops {
|
|
int kind;
|
|
int datalen;
|
|
int (*change)(struct net *net, void *,
|
|
int, struct tcf_ematch *);
|
|
int (*match)(struct sk_buff *, struct tcf_ematch *,
|
|
struct tcf_pkt_info *);
|
|
void (*destroy)(struct tcf_ematch *);
|
|
int (*dump)(struct sk_buff *, struct tcf_ematch *);
|
|
struct module *owner;
|
|
struct list_head link;
|
|
};
|
|
|
|
int tcf_em_register(struct tcf_ematch_ops *);
|
|
void tcf_em_unregister(struct tcf_ematch_ops *);
|
|
int tcf_em_tree_validate(struct tcf_proto *, struct nlattr *,
|
|
struct tcf_ematch_tree *);
|
|
void tcf_em_tree_destroy(struct tcf_ematch_tree *);
|
|
int tcf_em_tree_dump(struct sk_buff *, struct tcf_ematch_tree *, int);
|
|
int __tcf_em_tree_match(struct sk_buff *, struct tcf_ematch_tree *,
|
|
struct tcf_pkt_info *);
|
|
|
|
/**
|
|
* tcf_em_tree_match - evaulate an ematch tree
|
|
*
|
|
* @skb: socket buffer of the packet in question
|
|
* @tree: ematch tree to be used for evaluation
|
|
* @info: packet information examined by classifier
|
|
*
|
|
* This function matches @skb against the ematch tree in @tree by going
|
|
* through all ematches respecting their logic relations returning
|
|
* as soon as the result is obvious.
|
|
*
|
|
* Returns 1 if the ematch tree as-one matches, no ematches are configured
|
|
* or ematch is not enabled in the kernel, otherwise 0 is returned.
|
|
*/
|
|
static inline int tcf_em_tree_match(struct sk_buff *skb,
|
|
struct tcf_ematch_tree *tree,
|
|
struct tcf_pkt_info *info)
|
|
{
|
|
if (tree->hdr.nmatches)
|
|
return __tcf_em_tree_match(skb, tree, info);
|
|
else
|
|
return 1;
|
|
}
|
|
|
|
#define MODULE_ALIAS_TCF_EMATCH(kind) MODULE_ALIAS("ematch-kind-" __stringify(kind))
|
|
|
|
#else /* CONFIG_NET_EMATCH */
|
|
|
|
struct tcf_ematch_tree {
|
|
};
|
|
|
|
#define tcf_em_tree_validate(tp, tb, t) ((void)(t), 0)
|
|
#define tcf_em_tree_destroy(t) do { (void)(t); } while(0)
|
|
#define tcf_em_tree_dump(skb, t, tlv) (0)
|
|
#define tcf_em_tree_match(skb, t, info) ((void)(info), 1)
|
|
|
|
#endif /* CONFIG_NET_EMATCH */
|
|
|
|
static inline unsigned char * tcf_get_base_ptr(struct sk_buff *skb, int layer)
|
|
{
|
|
switch (layer) {
|
|
case TCF_LAYER_LINK:
|
|
return skb_mac_header(skb);
|
|
case TCF_LAYER_NETWORK:
|
|
return skb_network_header(skb);
|
|
case TCF_LAYER_TRANSPORT:
|
|
return skb_transport_header(skb);
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static inline int tcf_valid_offset(const struct sk_buff *skb,
|
|
const unsigned char *ptr, const int len)
|
|
{
|
|
return likely((ptr + len) <= skb_tail_pointer(skb) &&
|
|
ptr >= skb->head &&
|
|
(ptr <= (ptr + len)));
|
|
}
|
|
|
|
static inline int
|
|
tcf_change_indev(struct net *net, struct nlattr *indev_tlv,
|
|
struct netlink_ext_ack *extack)
|
|
{
|
|
char indev[IFNAMSIZ];
|
|
struct net_device *dev;
|
|
|
|
if (nla_strlcpy(indev, indev_tlv, IFNAMSIZ) >= IFNAMSIZ) {
|
|
NL_SET_ERR_MSG(extack, "Interface name too long");
|
|
return -EINVAL;
|
|
}
|
|
dev = __dev_get_by_name(net, indev);
|
|
if (!dev)
|
|
return -ENODEV;
|
|
return dev->ifindex;
|
|
}
|
|
|
|
static inline bool
|
|
tcf_match_indev(struct sk_buff *skb, int ifindex)
|
|
{
|
|
if (!ifindex)
|
|
return true;
|
|
if (!skb->skb_iif)
|
|
return false;
|
|
return ifindex == skb->skb_iif;
|
|
}
|
|
|
|
int tc_setup_flow_action(struct flow_action *flow_action,
|
|
const struct tcf_exts *exts);
|
|
int tc_setup_cb_call(struct tcf_block *block, enum tc_setup_type type,
|
|
void *type_data, bool err_stop);
|
|
unsigned int tcf_exts_num_actions(struct tcf_exts *exts);
|
|
|
|
struct tc_cls_u32_knode {
|
|
struct tcf_exts *exts;
|
|
struct tcf_result *res;
|
|
struct tc_u32_sel *sel;
|
|
u32 handle;
|
|
u32 val;
|
|
u32 mask;
|
|
u32 link_handle;
|
|
u8 fshift;
|
|
};
|
|
|
|
struct tc_cls_u32_hnode {
|
|
u32 handle;
|
|
u32 prio;
|
|
unsigned int divisor;
|
|
};
|
|
|
|
enum tc_clsu32_command {
|
|
TC_CLSU32_NEW_KNODE,
|
|
TC_CLSU32_REPLACE_KNODE,
|
|
TC_CLSU32_DELETE_KNODE,
|
|
TC_CLSU32_NEW_HNODE,
|
|
TC_CLSU32_REPLACE_HNODE,
|
|
TC_CLSU32_DELETE_HNODE,
|
|
};
|
|
|
|
struct tc_cls_u32_offload {
|
|
struct flow_cls_common_offload common;
|
|
/* knode values */
|
|
enum tc_clsu32_command command;
|
|
union {
|
|
struct tc_cls_u32_knode knode;
|
|
struct tc_cls_u32_hnode hnode;
|
|
};
|
|
};
|
|
|
|
static inline bool tc_can_offload(const struct net_device *dev)
|
|
{
|
|
return dev->features & NETIF_F_HW_TC;
|
|
}
|
|
|
|
static inline bool tc_can_offload_extack(const struct net_device *dev,
|
|
struct netlink_ext_ack *extack)
|
|
{
|
|
bool can = tc_can_offload(dev);
|
|
|
|
if (!can)
|
|
NL_SET_ERR_MSG(extack, "TC offload is disabled on net device");
|
|
|
|
return can;
|
|
}
|
|
|
|
static inline bool
|
|
tc_cls_can_offload_and_chain0(const struct net_device *dev,
|
|
struct flow_cls_common_offload *common)
|
|
{
|
|
if (!tc_can_offload_extack(dev, common->extack))
|
|
return false;
|
|
if (common->chain_index) {
|
|
NL_SET_ERR_MSG(common->extack,
|
|
"Driver supports only offload of chain 0");
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
static inline bool tc_skip_hw(u32 flags)
|
|
{
|
|
return (flags & TCA_CLS_FLAGS_SKIP_HW) ? true : false;
|
|
}
|
|
|
|
static inline bool tc_skip_sw(u32 flags)
|
|
{
|
|
return (flags & TCA_CLS_FLAGS_SKIP_SW) ? true : false;
|
|
}
|
|
|
|
/* SKIP_HW and SKIP_SW are mutually exclusive flags. */
|
|
static inline bool tc_flags_valid(u32 flags)
|
|
{
|
|
if (flags & ~(TCA_CLS_FLAGS_SKIP_HW | TCA_CLS_FLAGS_SKIP_SW |
|
|
TCA_CLS_FLAGS_VERBOSE))
|
|
return false;
|
|
|
|
flags &= TCA_CLS_FLAGS_SKIP_HW | TCA_CLS_FLAGS_SKIP_SW;
|
|
if (!(flags ^ (TCA_CLS_FLAGS_SKIP_HW | TCA_CLS_FLAGS_SKIP_SW)))
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
static inline bool tc_in_hw(u32 flags)
|
|
{
|
|
return (flags & TCA_CLS_FLAGS_IN_HW) ? true : false;
|
|
}
|
|
|
|
static inline void
|
|
tc_cls_common_offload_init(struct flow_cls_common_offload *cls_common,
|
|
const struct tcf_proto *tp, u32 flags,
|
|
struct netlink_ext_ack *extack)
|
|
{
|
|
cls_common->chain_index = tp->chain->index;
|
|
cls_common->protocol = tp->protocol;
|
|
cls_common->prio = tp->prio;
|
|
if (tc_skip_sw(flags) || flags & TCA_CLS_FLAGS_VERBOSE)
|
|
cls_common->extack = extack;
|
|
}
|
|
|
|
enum tc_matchall_command {
|
|
TC_CLSMATCHALL_REPLACE,
|
|
TC_CLSMATCHALL_DESTROY,
|
|
TC_CLSMATCHALL_STATS,
|
|
};
|
|
|
|
struct tc_cls_matchall_offload {
|
|
struct flow_cls_common_offload common;
|
|
enum tc_matchall_command command;
|
|
struct flow_rule *rule;
|
|
struct flow_stats stats;
|
|
unsigned long cookie;
|
|
};
|
|
|
|
enum tc_clsbpf_command {
|
|
TC_CLSBPF_OFFLOAD,
|
|
TC_CLSBPF_STATS,
|
|
};
|
|
|
|
struct tc_cls_bpf_offload {
|
|
struct flow_cls_common_offload common;
|
|
enum tc_clsbpf_command command;
|
|
struct tcf_exts *exts;
|
|
struct bpf_prog *prog;
|
|
struct bpf_prog *oldprog;
|
|
const char *name;
|
|
bool exts_integrated;
|
|
};
|
|
|
|
struct tc_mqprio_qopt_offload {
|
|
/* struct tc_mqprio_qopt must always be the first element */
|
|
struct tc_mqprio_qopt qopt;
|
|
u16 mode;
|
|
u16 shaper;
|
|
u32 flags;
|
|
u64 min_rate[TC_QOPT_MAX_QUEUE];
|
|
u64 max_rate[TC_QOPT_MAX_QUEUE];
|
|
};
|
|
|
|
/* This structure holds cookie structure that is passed from user
|
|
* to the kernel for actions and classifiers
|
|
*/
|
|
struct tc_cookie {
|
|
u8 *data;
|
|
u32 len;
|
|
struct rcu_head rcu;
|
|
};
|
|
|
|
struct tc_qopt_offload_stats {
|
|
struct gnet_stats_basic_packed *bstats;
|
|
struct gnet_stats_queue *qstats;
|
|
};
|
|
|
|
enum tc_mq_command {
|
|
TC_MQ_CREATE,
|
|
TC_MQ_DESTROY,
|
|
TC_MQ_STATS,
|
|
TC_MQ_GRAFT,
|
|
};
|
|
|
|
struct tc_mq_opt_offload_graft_params {
|
|
unsigned long queue;
|
|
u32 child_handle;
|
|
};
|
|
|
|
struct tc_mq_qopt_offload {
|
|
enum tc_mq_command command;
|
|
u32 handle;
|
|
union {
|
|
struct tc_qopt_offload_stats stats;
|
|
struct tc_mq_opt_offload_graft_params graft_params;
|
|
};
|
|
};
|
|
|
|
enum tc_red_command {
|
|
TC_RED_REPLACE,
|
|
TC_RED_DESTROY,
|
|
TC_RED_STATS,
|
|
TC_RED_XSTATS,
|
|
TC_RED_GRAFT,
|
|
};
|
|
|
|
struct tc_red_qopt_offload_params {
|
|
u32 min;
|
|
u32 max;
|
|
u32 probability;
|
|
u32 limit;
|
|
bool is_ecn;
|
|
bool is_harddrop;
|
|
struct gnet_stats_queue *qstats;
|
|
};
|
|
|
|
struct tc_red_qopt_offload {
|
|
enum tc_red_command command;
|
|
u32 handle;
|
|
u32 parent;
|
|
union {
|
|
struct tc_red_qopt_offload_params set;
|
|
struct tc_qopt_offload_stats stats;
|
|
struct red_stats *xstats;
|
|
u32 child_handle;
|
|
};
|
|
};
|
|
|
|
enum tc_gred_command {
|
|
TC_GRED_REPLACE,
|
|
TC_GRED_DESTROY,
|
|
TC_GRED_STATS,
|
|
};
|
|
|
|
struct tc_gred_vq_qopt_offload_params {
|
|
bool present;
|
|
u32 limit;
|
|
u32 prio;
|
|
u32 min;
|
|
u32 max;
|
|
bool is_ecn;
|
|
bool is_harddrop;
|
|
u32 probability;
|
|
/* Only need backlog, see struct tc_prio_qopt_offload_params */
|
|
u32 *backlog;
|
|
};
|
|
|
|
struct tc_gred_qopt_offload_params {
|
|
bool grio_on;
|
|
bool wred_on;
|
|
unsigned int dp_cnt;
|
|
unsigned int dp_def;
|
|
struct gnet_stats_queue *qstats;
|
|
struct tc_gred_vq_qopt_offload_params tab[MAX_DPs];
|
|
};
|
|
|
|
struct tc_gred_qopt_offload_stats {
|
|
struct gnet_stats_basic_packed bstats[MAX_DPs];
|
|
struct gnet_stats_queue qstats[MAX_DPs];
|
|
struct red_stats *xstats[MAX_DPs];
|
|
};
|
|
|
|
struct tc_gred_qopt_offload {
|
|
enum tc_gred_command command;
|
|
u32 handle;
|
|
u32 parent;
|
|
union {
|
|
struct tc_gred_qopt_offload_params set;
|
|
struct tc_gred_qopt_offload_stats stats;
|
|
};
|
|
};
|
|
|
|
enum tc_prio_command {
|
|
TC_PRIO_REPLACE,
|
|
TC_PRIO_DESTROY,
|
|
TC_PRIO_STATS,
|
|
TC_PRIO_GRAFT,
|
|
};
|
|
|
|
struct tc_prio_qopt_offload_params {
|
|
int bands;
|
|
u8 priomap[TC_PRIO_MAX + 1];
|
|
/* In case that a prio qdisc is offloaded and now is changed to a
|
|
* non-offloadedable config, it needs to update the backlog & qlen
|
|
* values to negate the HW backlog & qlen values (and only them).
|
|
*/
|
|
struct gnet_stats_queue *qstats;
|
|
};
|
|
|
|
struct tc_prio_qopt_offload_graft_params {
|
|
u8 band;
|
|
u32 child_handle;
|
|
};
|
|
|
|
struct tc_prio_qopt_offload {
|
|
enum tc_prio_command command;
|
|
u32 handle;
|
|
u32 parent;
|
|
union {
|
|
struct tc_prio_qopt_offload_params replace_params;
|
|
struct tc_qopt_offload_stats stats;
|
|
struct tc_prio_qopt_offload_graft_params graft_params;
|
|
};
|
|
};
|
|
|
|
enum tc_root_command {
|
|
TC_ROOT_GRAFT,
|
|
};
|
|
|
|
struct tc_root_qopt_offload {
|
|
enum tc_root_command command;
|
|
u32 handle;
|
|
bool ingress;
|
|
};
|
|
|
|
#endif
|