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Linux/include/net/act_api.h

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Diff markup

Differences between /include/net/act_api.h (Version linux-5.2.21) and /include/net/act_api.h (Version linux-4.20.17)


  1 /* SPDX-License-Identifier: GPL-2.0 */              1 /* SPDX-License-Identifier: GPL-2.0 */
  2 #ifndef __NET_ACT_API_H                             2 #ifndef __NET_ACT_API_H
  3 #define __NET_ACT_API_H                             3 #define __NET_ACT_API_H
  4                                                     4 
  5 /*                                                  5 /*
  6  * Public action API for classifiers/qdiscs         6  * Public action API for classifiers/qdiscs
  7 */                                                  7 */
  8                                                     8 
  9 #include <linux/refcount.h>                         9 #include <linux/refcount.h>
 10 #include <net/sch_generic.h>                       10 #include <net/sch_generic.h>
 11 #include <net/pkt_sched.h>                         11 #include <net/pkt_sched.h>
 12 #include <net/net_namespace.h>                     12 #include <net/net_namespace.h>
 13 #include <net/netns/generic.h>                     13 #include <net/netns/generic.h>
 14                                                    14 
 15 struct tcf_idrinfo {                               15 struct tcf_idrinfo {
 16         struct mutex    lock;                      16         struct mutex    lock;
 17         struct idr      action_idr;                17         struct idr      action_idr;
 18         struct net      *net;                  << 
 19 };                                                 18 };
 20                                                    19 
 21 struct tc_action_ops;                              20 struct tc_action_ops;
 22                                                    21 
 23 struct tc_action {                                 22 struct tc_action {
 24         const struct tc_action_ops      *ops;      23         const struct tc_action_ops      *ops;
 25         __u32                           type;      24         __u32                           type; /* for backward compat(TCA_OLD_COMPAT) */
 26         __u32                           order;     25         __u32                           order;
 27         struct tcf_idrinfo              *idrin     26         struct tcf_idrinfo              *idrinfo;
 28                                                    27 
 29         u32                             tcfa_i     28         u32                             tcfa_index;
 30         refcount_t                      tcfa_r     29         refcount_t                      tcfa_refcnt;
 31         atomic_t                        tcfa_b     30         atomic_t                        tcfa_bindcnt;
 32         int                             tcfa_a     31         int                             tcfa_action;
 33         struct tcf_t                    tcfa_t     32         struct tcf_t                    tcfa_tm;
 34         struct gnet_stats_basic_packed  tcfa_b     33         struct gnet_stats_basic_packed  tcfa_bstats;
 35         struct gnet_stats_basic_packed  tcfa_b     34         struct gnet_stats_basic_packed  tcfa_bstats_hw;
 36         struct gnet_stats_queue         tcfa_q     35         struct gnet_stats_queue         tcfa_qstats;
 37         struct net_rate_estimator __rcu *tcfa_     36         struct net_rate_estimator __rcu *tcfa_rate_est;
 38         spinlock_t                      tcfa_l     37         spinlock_t                      tcfa_lock;
 39         struct gnet_stats_basic_cpu __percpu *     38         struct gnet_stats_basic_cpu __percpu *cpu_bstats;
 40         struct gnet_stats_basic_cpu __percpu *     39         struct gnet_stats_basic_cpu __percpu *cpu_bstats_hw;
 41         struct gnet_stats_queue __percpu *cpu_     40         struct gnet_stats_queue __percpu *cpu_qstats;
 42         struct tc_cookie        __rcu *act_coo     41         struct tc_cookie        __rcu *act_cookie;
 43         struct tcf_chain        __rcu *goto_ch !!  42         struct tcf_chain        *goto_chain;
 44 };                                                 43 };
 45 #define tcf_index       common.tcfa_index          44 #define tcf_index       common.tcfa_index
 46 #define tcf_refcnt      common.tcfa_refcnt         45 #define tcf_refcnt      common.tcfa_refcnt
 47 #define tcf_bindcnt     common.tcfa_bindcnt        46 #define tcf_bindcnt     common.tcfa_bindcnt
 48 #define tcf_action      common.tcfa_action         47 #define tcf_action      common.tcfa_action
 49 #define tcf_tm          common.tcfa_tm             48 #define tcf_tm          common.tcfa_tm
 50 #define tcf_bstats      common.tcfa_bstats         49 #define tcf_bstats      common.tcfa_bstats
 51 #define tcf_qstats      common.tcfa_qstats         50 #define tcf_qstats      common.tcfa_qstats
 52 #define tcf_rate_est    common.tcfa_rate_est       51 #define tcf_rate_est    common.tcfa_rate_est
 53 #define tcf_lock        common.tcfa_lock           52 #define tcf_lock        common.tcfa_lock
 54                                                    53 
 55 /* Update lastuse only if needed, to avoid dir     54 /* Update lastuse only if needed, to avoid dirtying a cache line.
 56  * We use a temp variable to avoid fetching ji     55  * We use a temp variable to avoid fetching jiffies twice.
 57  */                                                56  */
 58 static inline void tcf_lastuse_update(struct t     57 static inline void tcf_lastuse_update(struct tcf_t *tm)
 59 {                                                  58 {
 60         unsigned long now = jiffies;               59         unsigned long now = jiffies;
 61                                                    60 
 62         if (tm->lastuse != now)                    61         if (tm->lastuse != now)
 63                 tm->lastuse = now;                 62                 tm->lastuse = now;
 64         if (unlikely(!tm->firstuse))               63         if (unlikely(!tm->firstuse))
 65                 tm->firstuse = now;                64                 tm->firstuse = now;
 66 }                                                  65 }
 67                                                    66 
 68 static inline void tcf_tm_dump(struct tcf_t *d     67 static inline void tcf_tm_dump(struct tcf_t *dtm, const struct tcf_t *stm)
 69 {                                                  68 {
 70         dtm->install = jiffies_to_clock_t(jiff     69         dtm->install = jiffies_to_clock_t(jiffies - stm->install);
 71         dtm->lastuse = jiffies_to_clock_t(jiff     70         dtm->lastuse = jiffies_to_clock_t(jiffies - stm->lastuse);
 72         dtm->firstuse = jiffies_to_clock_t(jif     71         dtm->firstuse = jiffies_to_clock_t(jiffies - stm->firstuse);
 73         dtm->expires = jiffies_to_clock_t(stm-     72         dtm->expires = jiffies_to_clock_t(stm->expires);
 74 }                                                  73 }
 75                                                    74 
 76 #ifdef CONFIG_NET_CLS_ACT                          75 #ifdef CONFIG_NET_CLS_ACT
 77                                                    76 
 78 #define ACT_P_CREATED 1                            77 #define ACT_P_CREATED 1
 79 #define ACT_P_DELETED 1                            78 #define ACT_P_DELETED 1
 80                                                    79 
 81 struct tc_action_ops {                             80 struct tc_action_ops {
 82         struct list_head head;                     81         struct list_head head;
 83         char    kind[IFNAMSIZ];                    82         char    kind[IFNAMSIZ];
 84         enum tca_id  id; /* identifier should  !!  83         __u32   type; /* TBD to match kind */
 85         size_t  size;                              84         size_t  size;
 86         struct module           *owner;            85         struct module           *owner;
 87         int     (*act)(struct sk_buff *, const     86         int     (*act)(struct sk_buff *, const struct tc_action *,
 88                        struct tcf_result *); /     87                        struct tcf_result *); /* called under RCU BH lock*/
 89         int     (*dump)(struct sk_buff *, stru     88         int     (*dump)(struct sk_buff *, struct tc_action *, int, int);
 90         void    (*cleanup)(struct tc_action *)     89         void    (*cleanup)(struct tc_action *);
 91         int     (*lookup)(struct net *net, str     90         int     (*lookup)(struct net *net, struct tc_action **a, u32 index);
 92         int     (*init)(struct net *net, struc     91         int     (*init)(struct net *net, struct nlattr *nla,
 93                         struct nlattr *est, st     92                         struct nlattr *est, struct tc_action **act, int ovr,
 94                         int bind, bool rtnl_he !!  93                         int bind, bool rtnl_held,
 95                         struct netlink_ext_ack     94                         struct netlink_ext_ack *extack);
 96         int     (*walk)(struct net *, struct s     95         int     (*walk)(struct net *, struct sk_buff *,
 97                         struct netlink_callbac     96                         struct netlink_callback *, int,
 98                         const struct tc_action     97                         const struct tc_action_ops *,
 99                         struct netlink_ext_ack     98                         struct netlink_ext_ack *);
100         void    (*stats_update)(struct tc_acti     99         void    (*stats_update)(struct tc_action *, u64, u32, u64, bool);
101         size_t  (*get_fill_size)(const struct     100         size_t  (*get_fill_size)(const struct tc_action *act);
102         struct net_device *(*get_dev)(const st    101         struct net_device *(*get_dev)(const struct tc_action *a);
103         void    (*put_dev)(struct net_device *    102         void    (*put_dev)(struct net_device *dev);
104 };                                                103 };
105                                                   104 
106 struct tc_action_net {                            105 struct tc_action_net {
107         struct tcf_idrinfo *idrinfo;              106         struct tcf_idrinfo *idrinfo;
108         const struct tc_action_ops *ops;          107         const struct tc_action_ops *ops;
109 };                                                108 };
110                                                   109 
111 static inline                                     110 static inline
112 int tc_action_net_init(struct net *net, struct !! 111 int tc_action_net_init(struct tc_action_net *tn,
113                        const struct tc_action_    112                        const struct tc_action_ops *ops)
114 {                                                 113 {
115         int err = 0;                              114         int err = 0;
116                                                   115 
117         tn->idrinfo = kmalloc(sizeof(*tn->idri    116         tn->idrinfo = kmalloc(sizeof(*tn->idrinfo), GFP_KERNEL);
118         if (!tn->idrinfo)                         117         if (!tn->idrinfo)
119                 return -ENOMEM;                   118                 return -ENOMEM;
120         tn->ops = ops;                            119         tn->ops = ops;
121         tn->idrinfo->net = net;                << 
122         mutex_init(&tn->idrinfo->lock);           120         mutex_init(&tn->idrinfo->lock);
123         idr_init(&tn->idrinfo->action_idr);       121         idr_init(&tn->idrinfo->action_idr);
124         return err;                               122         return err;
125 }                                                 123 }
126                                                   124 
127 void tcf_idrinfo_destroy(const struct tc_actio    125 void tcf_idrinfo_destroy(const struct tc_action_ops *ops,
128                          struct tcf_idrinfo *i    126                          struct tcf_idrinfo *idrinfo);
129                                                   127 
130 static inline void tc_action_net_exit(struct l    128 static inline void tc_action_net_exit(struct list_head *net_list,
131                                       unsigned    129                                       unsigned int id)
132 {                                                 130 {
133         struct net *net;                          131         struct net *net;
134                                                   132 
135         rtnl_lock();                              133         rtnl_lock();
136         list_for_each_entry(net, net_list, exi    134         list_for_each_entry(net, net_list, exit_list) {
137                 struct tc_action_net *tn = net    135                 struct tc_action_net *tn = net_generic(net, id);
138                                                   136 
139                 tcf_idrinfo_destroy(tn->ops, t    137                 tcf_idrinfo_destroy(tn->ops, tn->idrinfo);
140                 kfree(tn->idrinfo);               138                 kfree(tn->idrinfo);
141         }                                         139         }
142         rtnl_unlock();                            140         rtnl_unlock();
143 }                                                 141 }
144                                                   142 
145 int tcf_generic_walker(struct tc_action_net *t    143 int tcf_generic_walker(struct tc_action_net *tn, struct sk_buff *skb,
146                        struct netlink_callback    144                        struct netlink_callback *cb, int type,
147                        const struct tc_action_    145                        const struct tc_action_ops *ops,
148                        struct netlink_ext_ack     146                        struct netlink_ext_ack *extack);
149 int tcf_idr_search(struct tc_action_net *tn, s    147 int tcf_idr_search(struct tc_action_net *tn, struct tc_action **a, u32 index);
150 int tcf_idr_create(struct tc_action_net *tn, u    148 int tcf_idr_create(struct tc_action_net *tn, u32 index, struct nlattr *est,
151                    struct tc_action **a, const    149                    struct tc_action **a, const struct tc_action_ops *ops,
152                    int bind, bool cpustats);      150                    int bind, bool cpustats);
153 void tcf_idr_insert(struct tc_action_net *tn,     151 void tcf_idr_insert(struct tc_action_net *tn, struct tc_action *a);
154                                                   152 
155 void tcf_idr_cleanup(struct tc_action_net *tn,    153 void tcf_idr_cleanup(struct tc_action_net *tn, u32 index);
156 int tcf_idr_check_alloc(struct tc_action_net *    154 int tcf_idr_check_alloc(struct tc_action_net *tn, u32 *index,
157                         struct tc_action **a,     155                         struct tc_action **a, int bind);
158 int __tcf_idr_release(struct tc_action *a, boo    156 int __tcf_idr_release(struct tc_action *a, bool bind, bool strict);
159                                                   157 
160 static inline int tcf_idr_release(struct tc_ac    158 static inline int tcf_idr_release(struct tc_action *a, bool bind)
161 {                                                 159 {
162         return __tcf_idr_release(a, bind, fals    160         return __tcf_idr_release(a, bind, false);
163 }                                                 161 }
164                                                   162 
165 int tcf_register_action(struct tc_action_ops *    163 int tcf_register_action(struct tc_action_ops *a, struct pernet_operations *ops);
166 int tcf_unregister_action(struct tc_action_ops    164 int tcf_unregister_action(struct tc_action_ops *a,
167                           struct pernet_operat    165                           struct pernet_operations *ops);
168 int tcf_action_destroy(struct tc_action *actio    166 int tcf_action_destroy(struct tc_action *actions[], int bind);
169 int tcf_action_exec(struct sk_buff *skb, struc    167 int tcf_action_exec(struct sk_buff *skb, struct tc_action **actions,
170                     int nr_actions, struct tcf    168                     int nr_actions, struct tcf_result *res);
171 int tcf_action_init(struct net *net, struct tc    169 int tcf_action_init(struct net *net, struct tcf_proto *tp, struct nlattr *nla,
172                     struct nlattr *est, char *    170                     struct nlattr *est, char *name, int ovr, int bind,
173                     struct tc_action *actions[    171                     struct tc_action *actions[], size_t *attr_size,
174                     bool rtnl_held, struct net    172                     bool rtnl_held, struct netlink_ext_ack *extack);
175 struct tc_action *tcf_action_init_1(struct net    173 struct tc_action *tcf_action_init_1(struct net *net, struct tcf_proto *tp,
176                                     struct nla    174                                     struct nlattr *nla, struct nlattr *est,
177                                     char *name    175                                     char *name, int ovr, int bind,
178                                     bool rtnl_    176                                     bool rtnl_held,
179                                     struct net    177                                     struct netlink_ext_ack *extack);
180 int tcf_action_dump(struct sk_buff *skb, struc    178 int tcf_action_dump(struct sk_buff *skb, struct tc_action *actions[], int bind,
181                     int ref);                     179                     int ref);
182 int tcf_action_dump_old(struct sk_buff *skb, s    180 int tcf_action_dump_old(struct sk_buff *skb, struct tc_action *a, int, int);
183 int tcf_action_dump_1(struct sk_buff *skb, str    181 int tcf_action_dump_1(struct sk_buff *skb, struct tc_action *a, int, int);
184 int tcf_action_copy_stats(struct sk_buff *, st    182 int tcf_action_copy_stats(struct sk_buff *, struct tc_action *, int);
185                                                   183 
186 int tcf_action_check_ctrlact(int action, struc << 
187                              struct tcf_chain  << 
188                              struct netlink_ex << 
189 struct tcf_chain *tcf_action_set_ctrlact(struc << 
190                                          struc << 
191 #endif /* CONFIG_NET_CLS_ACT */                   184 #endif /* CONFIG_NET_CLS_ACT */
192                                                   185 
193 static inline void tcf_action_stats_update(str    186 static inline void tcf_action_stats_update(struct tc_action *a, u64 bytes,
194                                            u64    187                                            u64 packets, u64 lastuse, bool hw)
195 {                                                 188 {
196 #ifdef CONFIG_NET_CLS_ACT                         189 #ifdef CONFIG_NET_CLS_ACT
197         if (!a->ops->stats_update)                190         if (!a->ops->stats_update)
198                 return;                           191                 return;
199                                                   192 
200         a->ops->stats_update(a, bytes, packets    193         a->ops->stats_update(a, bytes, packets, lastuse, hw);
201 #endif                                            194 #endif
202 }                                                 195 }
203                                                   196 
                                                   >> 197 #ifdef CONFIG_NET_CLS_ACT
                                                   >> 198 int tc_setup_cb_egdev_register(const struct net_device *dev,
                                                   >> 199                                tc_setup_cb_t *cb, void *cb_priv);
                                                   >> 200 void tc_setup_cb_egdev_unregister(const struct net_device *dev,
                                                   >> 201                                   tc_setup_cb_t *cb, void *cb_priv);
                                                   >> 202 int tc_setup_cb_egdev_call(const struct net_device *dev,
                                                   >> 203                            enum tc_setup_type type, void *type_data,
                                                   >> 204                            bool err_stop);
                                                   >> 205 #else
                                                   >> 206 static inline
                                                   >> 207 int tc_setup_cb_egdev_register(const struct net_device *dev,
                                                   >> 208                                tc_setup_cb_t *cb, void *cb_priv)
                                                   >> 209 {
                                                   >> 210         return 0;
                                                   >> 211 }
                                                   >> 212 
                                                   >> 213 static inline
                                                   >> 214 void tc_setup_cb_egdev_unregister(const struct net_device *dev,
                                                   >> 215                                   tc_setup_cb_t *cb, void *cb_priv)
                                                   >> 216 {
                                                   >> 217 }
                                                   >> 218 
                                                   >> 219 static inline
                                                   >> 220 int tc_setup_cb_egdev_call(const struct net_device *dev,
                                                   >> 221                            enum tc_setup_type type, void *type_data,
                                                   >> 222                            bool err_stop)
                                                   >> 223 {
                                                   >> 224         return 0;
                                                   >> 225 }
                                                   >> 226 #endif
204                                                   227 
205 #endif                                            228 #endif
206                                                   229 

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