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netlink: Get rid of obsolete rtnetlink macros
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Removes all RTA_GET*() and RTA_PUT*() variations, as well as the
the unused rtattr_strcmp(). Get rid of rtm_get_table() by moving
it to its only user decnet.

Signed-off-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Thomas Graf authored and David S. Miller committed Jun 27, 2012
1 parent 6b60978 commit 4c3af03
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Showing 3 changed files with 8 additions and 142 deletions.
129 changes: 0 additions & 129 deletions include/linux/rtnetlink.h
View file
Original file line number Diff line number Diff line change
Expand Up @@ -612,12 +612,6 @@ struct tcamsg {
#include <linux/mutex.h>
#include <linux/netdevice.h>

static __inline__ int rtattr_strcmp(const struct rtattr *rta, const char *str)
{
int len = strlen(str) + 1;
return len > rta->rta_len || memcmp(RTA_DATA(rta), str, len);
}

extern int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, u32 group, int echo);
extern int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid);
extern void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid,
Expand All @@ -628,122 +622,6 @@ extern int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst,
u32 id, u32 ts, u32 tsage, long expires,
u32 error);

extern void __rta_fill(struct sk_buff *skb, int attrtype, int attrlen, const void *data);

#define RTA_PUT(skb, attrtype, attrlen, data) \
({ if (unlikely(skb_tailroom(skb) < (int)RTA_SPACE(attrlen))) \
goto rtattr_failure; \
__rta_fill(skb, attrtype, attrlen, data); })

#define RTA_APPEND(skb, attrlen, data) \
({ if (unlikely(skb_tailroom(skb) < (int)(attrlen))) \
goto rtattr_failure; \
memcpy(skb_put(skb, attrlen), data, attrlen); })

#define RTA_PUT_NOHDR(skb, attrlen, data) \
({ RTA_APPEND(skb, RTA_ALIGN(attrlen), data); \
memset(skb_tail_pointer(skb) - (RTA_ALIGN(attrlen) - attrlen), 0, \
RTA_ALIGN(attrlen) - attrlen); })

#define RTA_PUT_U8(skb, attrtype, value) \
({ u8 _tmp = (value); \
RTA_PUT(skb, attrtype, sizeof(u8), &_tmp); })

#define RTA_PUT_U16(skb, attrtype, value) \
({ u16 _tmp = (value); \
RTA_PUT(skb, attrtype, sizeof(u16), &_tmp); })

#define RTA_PUT_U32(skb, attrtype, value) \
({ u32 _tmp = (value); \
RTA_PUT(skb, attrtype, sizeof(u32), &_tmp); })

#define RTA_PUT_U64(skb, attrtype, value) \
({ u64 _tmp = (value); \
RTA_PUT(skb, attrtype, sizeof(u64), &_tmp); })

#define RTA_PUT_SECS(skb, attrtype, value) \
RTA_PUT_U64(skb, attrtype, (value) / HZ)

#define RTA_PUT_MSECS(skb, attrtype, value) \
RTA_PUT_U64(skb, attrtype, jiffies_to_msecs(value))

#define RTA_PUT_STRING(skb, attrtype, value) \
RTA_PUT(skb, attrtype, strlen(value) + 1, value)

#define RTA_PUT_FLAG(skb, attrtype) \
RTA_PUT(skb, attrtype, 0, NULL);

#define RTA_NEST(skb, type) \
({ struct rtattr *__start = (struct rtattr *)skb_tail_pointer(skb); \
RTA_PUT(skb, type, 0, NULL); \
__start; })

#define RTA_NEST_END(skb, start) \
({ (start)->rta_len = skb_tail_pointer(skb) - (unsigned char *)(start); \
(skb)->len; })

#define RTA_NEST_COMPAT(skb, type, attrlen, data) \
({ struct rtattr *__start = (struct rtattr *)skb_tail_pointer(skb); \
RTA_PUT(skb, type, attrlen, data); \
RTA_NEST(skb, type); \
__start; })

#define RTA_NEST_COMPAT_END(skb, start) \
({ struct rtattr *__nest = (void *)(start) + NLMSG_ALIGN((start)->rta_len); \
(start)->rta_len = skb_tail_pointer(skb) - (unsigned char *)(start); \
RTA_NEST_END(skb, __nest); \
(skb)->len; })

#define RTA_NEST_CANCEL(skb, start) \
({ if (start) \
skb_trim(skb, (unsigned char *) (start) - (skb)->data); \
-1; })

#define RTA_GET_U8(rta) \
({ if (!rta || RTA_PAYLOAD(rta) < sizeof(u8)) \
goto rtattr_failure; \
*(u8 *) RTA_DATA(rta); })

#define RTA_GET_U16(rta) \
({ if (!rta || RTA_PAYLOAD(rta) < sizeof(u16)) \
goto rtattr_failure; \
*(u16 *) RTA_DATA(rta); })

#define RTA_GET_U32(rta) \
({ if (!rta || RTA_PAYLOAD(rta) < sizeof(u32)) \
goto rtattr_failure; \
*(u32 *) RTA_DATA(rta); })

#define RTA_GET_U64(rta) \
({ u64 _tmp; \
if (!rta || RTA_PAYLOAD(rta) < sizeof(u64)) \
goto rtattr_failure; \
memcpy(&_tmp, RTA_DATA(rta), sizeof(_tmp)); \
_tmp; })

#define RTA_GET_FLAG(rta) (!!(rta))

#define RTA_GET_SECS(rta) ((unsigned long) RTA_GET_U64(rta) * HZ)
#define RTA_GET_MSECS(rta) (msecs_to_jiffies((unsigned long) RTA_GET_U64(rta)))

static inline struct rtattr *
__rta_reserve(struct sk_buff *skb, int attrtype, int attrlen)
{
struct rtattr *rta;
int size = RTA_LENGTH(attrlen);

rta = (struct rtattr*)skb_put(skb, RTA_ALIGN(size));
rta->rta_type = attrtype;
rta->rta_len = size;
memset(RTA_DATA(rta) + attrlen, 0, RTA_ALIGN(size) - size);
return rta;
}

#define __RTA_PUT(skb, attrtype, attrlen) \
({ if (unlikely(skb_tailroom(skb) < (int)RTA_SPACE(attrlen))) \
goto rtattr_failure; \
__rta_reserve(skb, attrtype, attrlen); })

extern void rtmsg_ifinfo(int type, struct net_device *dev, unsigned change);

/* RTNL is used as a global lock for all changes to network configuration */
Expand Down Expand Up @@ -794,13 +672,6 @@ extern void __rtnl_unlock(void);
} \
} while(0)

static inline u32 rtm_get_table(struct rtattr **rta, u8 table)
{
return RTA_GET_U32(rta[RTA_TABLE-1]);
rtattr_failure:
return table;
}

extern int ndo_dflt_fdb_dump(struct sk_buff *skb,
struct netlink_callback *cb,
struct net_device *dev,
Expand Down
13 changes: 0 additions & 13 deletions net/core/rtnetlink.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -541,19 +541,6 @@ static const int rta_max[RTM_NR_FAMILIES] =
[RTM_FAM(RTM_NEWACTION)] = TCAA_MAX,
};

void __rta_fill(struct sk_buff *skb, int attrtype, int attrlen, const void *data)
{
struct rtattr *rta;
int size = RTA_LENGTH(attrlen);

rta = (struct rtattr *)skb_put(skb, RTA_ALIGN(size));
rta->rta_type = attrtype;
rta->rta_len = size;
memcpy(RTA_DATA(rta), data, attrlen);
memset(RTA_DATA(rta) + attrlen, 0, RTA_ALIGN(size) - size);
}
EXPORT_SYMBOL(__rta_fill);

int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, unsigned int group, int echo)
{
struct sock *rtnl = net->rtnl;
Expand Down
8 changes: 8 additions & 0 deletions net/decnet/dn_fib.c
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Original file line number Diff line number Diff line change
Expand Up @@ -505,6 +505,14 @@ static int dn_fib_check_attr(struct rtmsg *r, struct rtattr **rta)
return 0;
}

static inline u32 rtm_get_table(struct rtattr **rta, u8 table)
{
if (rta[RTA_TABLE - 1])
table = nla_get_u32((struct nlattr *) rta[RTA_TABLE - 1]);

return table;
}

static int dn_fib_rtm_delroute(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
{
struct net *net = sock_net(skb->sk);
Expand Down

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