mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-15 08:14:15 +08:00
79976892f7
refcount_t type should be used instead of int when fib_treeref is used as a reference counter,and avoid use-after-free risks. Signed-off-by: Yajun Deng <yajun.deng@linux.dev> Reviewed-by: David Ahern <dsahern@kernel.org> Link: https://lore.kernel.org/r/20210729071350.28919-1-yajun.deng@linux.dev Signed-off-by: Jakub Kicinski <kuba@kernel.org>
168 lines
4.0 KiB
C
168 lines
4.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _NET_DN_FIB_H
|
|
#define _NET_DN_FIB_H
|
|
|
|
#include <linux/netlink.h>
|
|
#include <linux/refcount.h>
|
|
|
|
extern const struct nla_policy rtm_dn_policy[];
|
|
|
|
struct dn_fib_res {
|
|
struct fib_rule *r;
|
|
struct dn_fib_info *fi;
|
|
unsigned char prefixlen;
|
|
unsigned char nh_sel;
|
|
unsigned char type;
|
|
unsigned char scope;
|
|
};
|
|
|
|
struct dn_fib_nh {
|
|
struct net_device *nh_dev;
|
|
unsigned int nh_flags;
|
|
unsigned char nh_scope;
|
|
int nh_weight;
|
|
int nh_power;
|
|
int nh_oif;
|
|
__le16 nh_gw;
|
|
};
|
|
|
|
struct dn_fib_info {
|
|
struct dn_fib_info *fib_next;
|
|
struct dn_fib_info *fib_prev;
|
|
refcount_t fib_treeref;
|
|
refcount_t fib_clntref;
|
|
int fib_dead;
|
|
unsigned int fib_flags;
|
|
int fib_protocol;
|
|
__le16 fib_prefsrc;
|
|
__u32 fib_priority;
|
|
__u32 fib_metrics[RTAX_MAX];
|
|
int fib_nhs;
|
|
int fib_power;
|
|
struct dn_fib_nh fib_nh[0];
|
|
#define dn_fib_dev fib_nh[0].nh_dev
|
|
};
|
|
|
|
|
|
#define DN_FIB_RES_RESET(res) ((res).nh_sel = 0)
|
|
#define DN_FIB_RES_NH(res) ((res).fi->fib_nh[(res).nh_sel])
|
|
|
|
#define DN_FIB_RES_PREFSRC(res) ((res).fi->fib_prefsrc ? : __dn_fib_res_prefsrc(&res))
|
|
#define DN_FIB_RES_GW(res) (DN_FIB_RES_NH(res).nh_gw)
|
|
#define DN_FIB_RES_DEV(res) (DN_FIB_RES_NH(res).nh_dev)
|
|
#define DN_FIB_RES_OIF(res) (DN_FIB_RES_NH(res).nh_oif)
|
|
|
|
typedef struct {
|
|
__le16 datum;
|
|
} dn_fib_key_t;
|
|
|
|
typedef struct {
|
|
__le16 datum;
|
|
} dn_fib_hash_t;
|
|
|
|
typedef struct {
|
|
__u16 datum;
|
|
} dn_fib_idx_t;
|
|
|
|
struct dn_fib_node {
|
|
struct dn_fib_node *fn_next;
|
|
struct dn_fib_info *fn_info;
|
|
#define DN_FIB_INFO(f) ((f)->fn_info)
|
|
dn_fib_key_t fn_key;
|
|
u8 fn_type;
|
|
u8 fn_scope;
|
|
u8 fn_state;
|
|
};
|
|
|
|
|
|
struct dn_fib_table {
|
|
struct hlist_node hlist;
|
|
u32 n;
|
|
|
|
int (*insert)(struct dn_fib_table *t, struct rtmsg *r,
|
|
struct nlattr *attrs[], struct nlmsghdr *n,
|
|
struct netlink_skb_parms *req);
|
|
int (*delete)(struct dn_fib_table *t, struct rtmsg *r,
|
|
struct nlattr *attrs[], struct nlmsghdr *n,
|
|
struct netlink_skb_parms *req);
|
|
int (*lookup)(struct dn_fib_table *t, const struct flowidn *fld,
|
|
struct dn_fib_res *res);
|
|
int (*flush)(struct dn_fib_table *t);
|
|
int (*dump)(struct dn_fib_table *t, struct sk_buff *skb, struct netlink_callback *cb);
|
|
|
|
unsigned char data[];
|
|
};
|
|
|
|
#ifdef CONFIG_DECNET_ROUTER
|
|
/*
|
|
* dn_fib.c
|
|
*/
|
|
void dn_fib_init(void);
|
|
void dn_fib_cleanup(void);
|
|
|
|
int dn_fib_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg);
|
|
struct dn_fib_info *dn_fib_create_info(const struct rtmsg *r,
|
|
struct nlattr *attrs[],
|
|
const struct nlmsghdr *nlh, int *errp);
|
|
int dn_fib_semantic_match(int type, struct dn_fib_info *fi,
|
|
const struct flowidn *fld, struct dn_fib_res *res);
|
|
void dn_fib_release_info(struct dn_fib_info *fi);
|
|
void dn_fib_flush(void);
|
|
void dn_fib_select_multipath(const struct flowidn *fld, struct dn_fib_res *res);
|
|
|
|
/*
|
|
* dn_tables.c
|
|
*/
|
|
struct dn_fib_table *dn_fib_get_table(u32 n, int creat);
|
|
struct dn_fib_table *dn_fib_empty_table(void);
|
|
void dn_fib_table_init(void);
|
|
void dn_fib_table_cleanup(void);
|
|
|
|
/*
|
|
* dn_rules.c
|
|
*/
|
|
void dn_fib_rules_init(void);
|
|
void dn_fib_rules_cleanup(void);
|
|
unsigned int dnet_addr_type(__le16 addr);
|
|
int dn_fib_lookup(struct flowidn *fld, struct dn_fib_res *res);
|
|
|
|
int dn_fib_dump(struct sk_buff *skb, struct netlink_callback *cb);
|
|
|
|
void dn_fib_free_info(struct dn_fib_info *fi);
|
|
|
|
static inline void dn_fib_info_put(struct dn_fib_info *fi)
|
|
{
|
|
if (refcount_dec_and_test(&fi->fib_clntref))
|
|
dn_fib_free_info(fi);
|
|
}
|
|
|
|
static inline void dn_fib_res_put(struct dn_fib_res *res)
|
|
{
|
|
if (res->fi)
|
|
dn_fib_info_put(res->fi);
|
|
if (res->r)
|
|
fib_rule_put(res->r);
|
|
}
|
|
|
|
#else /* Endnode */
|
|
|
|
#define dn_fib_init() do { } while(0)
|
|
#define dn_fib_cleanup() do { } while(0)
|
|
|
|
#define dn_fib_lookup(fl, res) (-ESRCH)
|
|
#define dn_fib_info_put(fi) do { } while(0)
|
|
#define dn_fib_select_multipath(fl, res) do { } while(0)
|
|
#define dn_fib_rules_policy(saddr,res,flags) (0)
|
|
#define dn_fib_res_put(res) do { } while(0)
|
|
|
|
#endif /* CONFIG_DECNET_ROUTER */
|
|
|
|
static inline __le16 dnet_make_mask(int n)
|
|
{
|
|
if (n)
|
|
return cpu_to_le16(~((1 << (16 - n)) - 1));
|
|
return cpu_to_le16(0);
|
|
}
|
|
|
|
#endif /* _NET_DN_FIB_H */
|