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net/ipv6: Remove unused code and variables for rt6_info

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Drop unneeded elements from rt6_info struct and rearrange layout to
something more relevant for the data path.

Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David Ahern
2018-04-17 23:41:18 -04:00
committed by David S. Miller
parent 8d1c802b28
commit 77634cc67d
4 changed files with 6 additions and 107 deletions
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include/net/ip6_fib.h
+4 -58
View File
@@ -175,58 +175,20 @@ struct fib6_info {
struct rt6_info {
struct dst_entry dst;
struct rt6_info __rcu *rt6_next;
struct fib6_info *from;
/*
* Tail elements of dst_entry (__refcnt etc.)
* and these elements (rarely used in hot path) are in
* the same cache line.
*/
struct fib6_table *rt6i_table;
struct fib6_node __rcu *rt6i_node;
struct in6_addr rt6i_gateway;
/* Multipath routes:
* siblings is a list of rt6_info that have the the same metric/weight,
* destination, but not the same gateway. nsiblings is just a cache
* to speed up lookup.
*/
struct list_head rt6i_siblings;
unsigned int rt6i_nsiblings;
atomic_t rt6i_ref;
/* These are in a separate cache line. */
struct rt6key rt6i_dst ____cacheline_aligned_in_smp;
u32 rt6i_flags;
struct rt6key rt6i_dst;
struct rt6key rt6i_src;
struct in6_addr rt6i_gateway;
struct inet6_dev *rt6i_idev;
u32 rt6i_flags;
struct rt6key rt6i_prefsrc;
struct list_head rt6i_uncached;
struct uncached_list *rt6i_uncached_list;
struct inet6_dev *rt6i_idev;
struct rt6_info * __percpu *rt6i_pcpu;
struct rt6_exception_bucket __rcu *rt6i_exception_bucket;
u32 rt6i_metric;
/* more non-fragment space at head required */
unsigned short rt6i_nfheader_len;
u8 rt6i_protocol;
u8 fib6_type;
u8 exception_bucket_flushed:1,
should_flush:1,
dst_nocount:1,
dst_nopolicy:1,
dst_host:1,
unused:3;
unsigned long expires;
struct dst_metrics *fib6_metrics;
#define fib6_pmtu fib6_metrics->metrics[RTAX_MTU-1]
struct fib6_nh fib6_nh;
};
#define for_each_fib6_node_rt_rcu(fn) \
@@ -328,8 +290,6 @@ static inline void ip6_rt_put(struct rt6_info *rt)
dst_release(&rt->dst);
}
void rt6_free_pcpu(struct rt6_info *non_pcpu_rt);
struct fib6_info *fib6_info_alloc(gfp_t gfp_flags);
void fib6_info_destroy(struct fib6_info *f6i);
@@ -344,20 +304,6 @@ static inline void fib6_info_release(struct fib6_info *f6i)
fib6_info_destroy(f6i);
}
static inline void rt6_hold(struct rt6_info *rt)
{
atomic_inc(&rt->rt6i_ref);
}
static inline void rt6_release(struct rt6_info *rt)
{
if (atomic_dec_and_test(&rt->rt6i_ref)) {
rt6_free_pcpu(rt);
dst_dev_put(&rt->dst);
dst_release(&rt->dst);
}
}
enum fib6_walk_state {
#ifdef CONFIG_IPV6_SUBTREES
FWS_S,