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ila: Create main ila source file

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Create a main ila file that contains the module initialization functions
as well as netlink definitions. Previously these were defined in
ila_xlat and ila_common. This approach allows better extensibility.

Signed-off-by: Tom Herbert <tom@quantonium.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Tom Herbert 2018-06-27 14:39:01 -07:00 • committed by David S. Miller
parent b893281715
commit ad68147ef2
5 changed files with 168 additions and 147 deletions
Download patch file Download diff file Expand all files Collapse all files

2
net/ipv6/ila/Makefile
View file

@ -4,4 +4,4 @@
obj-$(CONFIG_IPV6_ILA) += ila.o obj-$(CONFIG_IPV6_ILA) += ila.o
ila-objs := ila_common.o ila_lwt.o ila_xlat.o ila-objs := ila_main.o ila_common.o ila_lwt.o ila_xlat.o

26
net/ipv6/ila/ila.h
View file

@ -19,6 +19,7 @@
#include <linux/skbuff.h> #include <linux/skbuff.h>
#include <linux/types.h> #include <linux/types.h>
#include <net/checksum.h> #include <net/checksum.h>
#include <net/genetlink.h>
#include <net/ip.h> #include <net/ip.h>
#include <net/protocol.h> #include <net/protocol.h>
#include <uapi/linux/ila.h> #include <uapi/linux/ila.h>
@ -104,9 +105,30 @@ void ila_update_ipv6_locator(struct sk_buff *skb, struct ila_params *p,
void ila_init_saved_csum(struct ila_params *p); void ila_init_saved_csum(struct ila_params *p);
struct ila_net {
struct {
struct rhashtable rhash_table;
spinlock_t *locks; /* Bucket locks for entry manipulation */
unsigned int locks_mask;
bool hooks_registered;
} xlat;
};
int ila_lwt_init(void); int ila_lwt_init(void);
void ila_lwt_fini(void); void ila_lwt_fini(void);
int ila_xlat_init(void);
void ila_xlat_fini(void); int ila_xlat_init_net(struct net *net);
void ila_xlat_exit_net(struct net *net);
int ila_xlat_nl_cmd_add_mapping(struct sk_buff *skb, struct genl_info *info);
int ila_xlat_nl_cmd_del_mapping(struct sk_buff *skb, struct genl_info *info);
int ila_xlat_nl_cmd_get_mapping(struct sk_buff *skb, struct genl_info *info);
int ila_xlat_nl_dump_start(struct netlink_callback *cb);
int ila_xlat_nl_dump_done(struct netlink_callback *cb);
int ila_xlat_nl_dump(struct sk_buff *skb, struct netlink_callback *cb);
extern unsigned int ila_net_id;
extern struct genl_family ila_nl_family;
#endif /* __ILA_H */ #endif /* __ILA_H */

30
net/ipv6/ila/ila_common.c
View file

@ -154,33 +154,3 @@ void ila_update_ipv6_locator(struct sk_buff *skb, struct ila_params *p,
iaddr->loc = p->locator; iaddr->loc = p->locator;
} }
static int __init ila_init(void)
{
int ret;
ret = ila_lwt_init();
if (ret)
goto fail_lwt;
ret = ila_xlat_init();
if (ret)
goto fail_xlat;
return 0;
fail_xlat:
ila_lwt_fini();
fail_lwt:
return ret;
}
static void __exit ila_fini(void)
{
ila_xlat_fini();
ila_lwt_fini();
}
module_init(ila_init);
module_exit(ila_fini);
MODULE_AUTHOR("Tom Herbert <tom@herbertland.com>");
MODULE_LICENSE("GPL");

115
net/ipv6/ila/ila_main.c Normal file
View file

@ -0,0 +1,115 @@
// SPDX-License-Identifier: GPL-2.0
#include <net/genetlink.h>
#include <net/ila.h>
#include <net/netns/generic.h>
#include <uapi/linux/genetlink.h>
#include "ila.h"
static const struct nla_policy ila_nl_policy[ILA_ATTR_MAX + 1] = {
[ILA_ATTR_LOCATOR] = { .type = NLA_U64, },
[ILA_ATTR_LOCATOR_MATCH] = { .type = NLA_U64, },
[ILA_ATTR_IFINDEX] = { .type = NLA_U32, },
[ILA_ATTR_CSUM_MODE] = { .type = NLA_U8, },
[ILA_ATTR_IDENT_TYPE] = { .type = NLA_U8, },
};
static const struct genl_ops ila_nl_ops[] = {
{
.cmd = ILA_CMD_ADD,
.doit = ila_xlat_nl_cmd_add_mapping,
.policy = ila_nl_policy,
.flags = GENL_ADMIN_PERM,
},
{
.cmd = ILA_CMD_DEL,
.doit = ila_xlat_nl_cmd_del_mapping,
.policy = ila_nl_policy,
.flags = GENL_ADMIN_PERM,
},
{
.cmd = ILA_CMD_GET,
.doit = ila_xlat_nl_cmd_get_mapping,
.start = ila_xlat_nl_dump_start,
.dumpit = ila_xlat_nl_dump,
.done = ila_xlat_nl_dump_done,
.policy = ila_nl_policy,
},
};
unsigned int ila_net_id;
struct genl_family ila_nl_family __ro_after_init = {
.hdrsize = 0,
.name = ILA_GENL_NAME,
.version = ILA_GENL_VERSION,
.maxattr = ILA_ATTR_MAX,
.netnsok = true,
.parallel_ops = true,
.module = THIS_MODULE,
.ops = ila_nl_ops,
.n_ops = ARRAY_SIZE(ila_nl_ops),
};
static __net_init int ila_init_net(struct net *net)
{
int err;
err = ila_xlat_init_net(net);
if (err)
goto ila_xlat_init_fail;
return 0;
ila_xlat_init_fail:
return err;
}
static __net_exit void ila_exit_net(struct net *net)
{
ila_xlat_exit_net(net);
}
static struct pernet_operations ila_net_ops = {
.init = ila_init_net,
.exit = ila_exit_net,
.id = &ila_net_id,
.size = sizeof(struct ila_net),
};
static int __init ila_init(void)
{
int ret;
ret = register_pernet_device(&ila_net_ops);
if (ret)
goto register_device_fail;
ret = genl_register_family(&ila_nl_family);
if (ret)
goto register_family_fail;
ret = ila_lwt_init();
if (ret)
goto fail_lwt;
return 0;
fail_lwt:
genl_unregister_family(&ila_nl_family);
register_family_fail:
unregister_pernet_device(&ila_net_ops);
register_device_fail:
return ret;
}
static void __exit ila_fini(void)
{
ila_lwt_fini();
genl_unregister_family(&ila_nl_family);
unregister_pernet_device(&ila_net_ops);
}
module_init(ila_init);
module_exit(ila_fini);
MODULE_AUTHOR("Tom Herbert <tom@herbertland.com>");
MODULE_LICENSE("GPL");

142
net/ipv6/ila/ila_xlat.c
View file

@ -22,21 +22,12 @@ struct ila_map {
struct rcu_head rcu; struct rcu_head rcu;
}; };
static unsigned int ila_net_id;
struct ila_net {
struct rhashtable rhash_table;
spinlock_t *locks; /* Bucket locks for entry manipulation */
unsigned int locks_mask;
bool hooks_registered;
};
#define MAX_LOCKS 1024 #define MAX_LOCKS 1024
#define LOCKS_PER_CPU 10 #define LOCKS_PER_CPU 10
static int alloc_ila_locks(struct ila_net *ilan) static int alloc_ila_locks(struct ila_net *ilan)
{ {
return alloc_bucket_spinlocks(&ilan->locks, &ilan->locks_mask, return alloc_bucket_spinlocks(&ilan->xlat.locks, &ilan->xlat.locks_mask,
MAX_LOCKS, LOCKS_PER_CPU, MAX_LOCKS, LOCKS_PER_CPU,
GFP_KERNEL); GFP_KERNEL);
} }
@ -58,7 +49,7 @@ static inline u32 ila_locator_hash(struct ila_locator loc)
static inline spinlock_t *ila_get_lock(struct ila_net *ilan, static inline spinlock_t *ila_get_lock(struct ila_net *ilan,
struct ila_locator loc) struct ila_locator loc)
{ {
return &ilan->locks[ila_locator_hash(loc) & ilan->locks_mask]; return &ilan->xlat.locks[ila_locator_hash(loc) & ilan->xlat.locks_mask];
} }
static inline int ila_cmp_wildcards(struct ila_map *ila, static inline int ila_cmp_wildcards(struct ila_map *ila,
@ -102,16 +93,6 @@ static const struct rhashtable_params rht_params = {
.obj_cmpfn = ila_cmpfn, .obj_cmpfn = ila_cmpfn,
}; };
static struct genl_family ila_nl_family;
static const struct nla_policy ila_nl_policy[ILA_ATTR_MAX + 1] = {
[ILA_ATTR_LOCATOR] = { .type = NLA_U64, },
[ILA_ATTR_LOCATOR_MATCH] = { .type = NLA_U64, },
[ILA_ATTR_IFINDEX] = { .type = NLA_U32, },
[ILA_ATTR_CSUM_MODE] = { .type = NLA_U8, },
[ILA_ATTR_IDENT_TYPE] = { .type = NLA_U8, },
};
static int parse_nl_config(struct genl_info *info, static int parse_nl_config(struct genl_info *info,
struct ila_xlat_params *xp) struct ila_xlat_params *xp)
{ {
@ -149,7 +130,7 @@ static inline struct ila_map *ila_lookup_wildcards(struct ila_addr *iaddr,
{ {
struct ila_map *ila; struct ila_map *ila;
ila = rhashtable_lookup_fast(&ilan->rhash_table, &iaddr->loc, ila = rhashtable_lookup_fast(&ilan->xlat.rhash_table, &iaddr->loc,
rht_params); rht_params);
while (ila) { while (ila) {
if (!ila_cmp_wildcards(ila, iaddr, ifindex)) if (!ila_cmp_wildcards(ila, iaddr, ifindex))
@ -166,7 +147,7 @@ static inline struct ila_map *ila_lookup_by_params(struct ila_xlat_params *xp,
{ {
struct ila_map *ila; struct ila_map *ila;
ila = rhashtable_lookup_fast(&ilan->rhash_table, ila = rhashtable_lookup_fast(&ilan->xlat.rhash_table,
&xp->ip.locator_match, &xp->ip.locator_match,
rht_params); rht_params);
while (ila) { while (ila) {
@ -222,7 +203,7 @@ static int ila_add_mapping(struct net *net, struct ila_xlat_params *xp)
spinlock_t *lock = ila_get_lock(ilan, xp->ip.locator_match); spinlock_t *lock = ila_get_lock(ilan, xp->ip.locator_match);
int err = 0, order; int err = 0, order;
if (!ilan->hooks_registered) { if (!ilan->xlat.hooks_registered) {
/* We defer registering net hooks in the namespace until the /* We defer registering net hooks in the namespace until the
* first mapping is added. * first mapping is added.
*/ */
@ -231,7 +212,7 @@ static int ila_add_mapping(struct net *net, struct ila_xlat_params *xp)
if (err) if (err)
return err; return err;
ilan->hooks_registered = true; ilan->xlat.hooks_registered = true;
} }
ila = kzalloc(sizeof(*ila), GFP_KERNEL); ila = kzalloc(sizeof(*ila), GFP_KERNEL);
@ -246,12 +227,12 @@ static int ila_add_mapping(struct net *net, struct ila_xlat_params *xp)
spin_lock(lock); spin_lock(lock);
head = rhashtable_lookup_fast(&ilan->rhash_table, head = rhashtable_lookup_fast(&ilan->xlat.rhash_table,
&xp->ip.locator_match, &xp->ip.locator_match,
rht_params); rht_params);
if (!head) { if (!head) {
/* New entry for the rhash_table */ /* New entry for the rhash_table */
err = rhashtable_lookup_insert_fast(&ilan->rhash_table, err = rhashtable_lookup_insert_fast(&ilan->xlat.rhash_table,
&ila->node, rht_params); &ila->node, rht_params);
} else { } else {
struct ila_map *tila = head, *prev = NULL; struct ila_map *tila = head, *prev = NULL;
@ -277,7 +258,7 @@ static int ila_add_mapping(struct net *net, struct ila_xlat_params *xp)
} else { } else {
/* Make this ila new head */ /* Make this ila new head */
RCU_INIT_POINTER(ila->next, head); RCU_INIT_POINTER(ila->next, head);
err = rhashtable_replace_fast(&ilan->rhash_table, err = rhashtable_replace_fast(&ilan->xlat.rhash_table,
&head->node, &head->node,
&ila->node, rht_params); &ila->node, rht_params);
if (err) if (err)
@ -303,7 +284,7 @@ static int ila_del_mapping(struct net *net, struct ila_xlat_params *xp)
spin_lock(lock); spin_lock(lock);
head = rhashtable_lookup_fast(&ilan->rhash_table, head = rhashtable_lookup_fast(&ilan->xlat.rhash_table,
&xp->ip.locator_match, rht_params); &xp->ip.locator_match, rht_params);
ila = head; ila = head;
@ -333,15 +314,15 @@ static int ila_del_mapping(struct net *net, struct ila_xlat_params *xp)
* table * table
*/ */
err = rhashtable_replace_fast( err = rhashtable_replace_fast(
&ilan->rhash_table, &ila->node, &ilan->xlat.rhash_table, &ila->node,
&head->node, rht_params); &head->node, rht_params);
if (err) if (err)
goto out; goto out;
} else { } else {
/* Entry no longer used */ /* Entry no longer used */
err = rhashtable_remove_fast(&ilan->rhash_table, err = rhashtable_remove_fast(
&ila->node, &ilan->xlat.rhash_table,
rht_params); &ila->node, rht_params);
} }
} }
@ -356,7 +337,7 @@ out:
return err; return err;
} }
static int ila_nl_cmd_add_mapping(struct sk_buff *skb, struct genl_info *info) int ila_xlat_nl_cmd_add_mapping(struct sk_buff *skb, struct genl_info *info)
{ {
struct net *net = genl_info_net(info); struct net *net = genl_info_net(info);
struct ila_xlat_params p; struct ila_xlat_params p;
@ -369,7 +350,7 @@ static int ila_nl_cmd_add_mapping(struct sk_buff *skb, struct genl_info *info)
return ila_add_mapping(net, &p); return ila_add_mapping(net, &p);
} }
static int ila_nl_cmd_del_mapping(struct sk_buff *skb, struct genl_info *info) int ila_xlat_nl_cmd_del_mapping(struct sk_buff *skb, struct genl_info *info)
{ {
struct net *net = genl_info_net(info); struct net *net = genl_info_net(info);
struct ila_xlat_params xp; struct ila_xlat_params xp;
@ -421,7 +402,7 @@ nla_put_failure:
return -EMSGSIZE; return -EMSGSIZE;
} }
static int ila_nl_cmd_get_mapping(struct sk_buff *skb, struct genl_info *info) int ila_xlat_nl_cmd_get_mapping(struct sk_buff *skb, struct genl_info *info)
{ {
struct net *net = genl_info_net(info); struct net *net = genl_info_net(info);
struct ila_net *ilan = net_generic(net, ila_net_id); struct ila_net *ilan = net_generic(net, ila_net_id);
@ -465,7 +446,7 @@ struct ila_dump_iter {
int skip; int skip;
}; };
static int ila_nl_dump_start(struct netlink_callback *cb) int ila_xlat_nl_dump_start(struct netlink_callback *cb)
{ {
struct net *net = sock_net(cb->skb->sk); struct net *net = sock_net(cb->skb->sk);
struct ila_net *ilan = net_generic(net, ila_net_id); struct ila_net *ilan = net_generic(net, ila_net_id);
@ -476,7 +457,7 @@ static int ila_nl_dump_start(struct netlink_callback *cb)
if (!iter) if (!iter)
return -ENOMEM; return -ENOMEM;
ret = rhashtable_walk_init(&ilan->rhash_table, &iter->rhiter, ret = rhashtable_walk_init(&ilan->xlat.rhash_table, &iter->rhiter,
GFP_KERNEL); GFP_KERNEL);
if (ret) { if (ret) {
kfree(iter); kfree(iter);
@ -489,7 +470,7 @@ static int ila_nl_dump_start(struct netlink_callback *cb)
return ret; return ret;
} }
static int ila_nl_dump_done(struct netlink_callback *cb) int ila_xlat_nl_dump_done(struct netlink_callback *cb)
{ {
struct ila_dump_iter *iter = (struct ila_dump_iter *)cb->args[0]; struct ila_dump_iter *iter = (struct ila_dump_iter *)cb->args[0];
@ -500,7 +481,7 @@ static int ila_nl_dump_done(struct netlink_callback *cb)
return 0; return 0;
} }
static int ila_nl_dump(struct sk_buff *skb, struct netlink_callback *cb) int ila_xlat_nl_dump(struct sk_buff *skb, struct netlink_callback *cb)
{ {
struct ila_dump_iter *iter = (struct ila_dump_iter *)cb->args[0]; struct ila_dump_iter *iter = (struct ila_dump_iter *)cb->args[0];
struct rhashtable_iter *rhiter = &iter->rhiter; struct rhashtable_iter *rhiter = &iter->rhiter;
@ -570,77 +551,35 @@ out_ret:
return ret; return ret;
} }
static const struct genl_ops ila_nl_ops[] = {
{
.cmd = ILA_CMD_ADD,
.doit = ila_nl_cmd_add_mapping,
.policy = ila_nl_policy,
.flags = GENL_ADMIN_PERM,
},
{
.cmd = ILA_CMD_DEL,
.doit = ila_nl_cmd_del_mapping,
.policy = ila_nl_policy,
.flags = GENL_ADMIN_PERM,
},
{
.cmd = ILA_CMD_GET,
.doit = ila_nl_cmd_get_mapping,
.start = ila_nl_dump_start,
.dumpit = ila_nl_dump,
.done = ila_nl_dump_done,
.policy = ila_nl_policy,
},
};
static struct genl_family ila_nl_family __ro_after_init = {
.hdrsize = 0,
.name = ILA_GENL_NAME,
.version = ILA_GENL_VERSION,
.maxattr = ILA_ATTR_MAX,
.netnsok = true,
.parallel_ops = true,
.module = THIS_MODULE,
.ops = ila_nl_ops,
.n_ops = ARRAY_SIZE(ila_nl_ops),
};
#define ILA_HASH_TABLE_SIZE 1024 #define ILA_HASH_TABLE_SIZE 1024
static __net_init int ila_init_net(struct net *net) int ila_xlat_init_net(struct net *net)
{ {
int err;
struct ila_net *ilan = net_generic(net, ila_net_id); struct ila_net *ilan = net_generic(net, ila_net_id);
int err;
err = alloc_ila_locks(ilan); err = alloc_ila_locks(ilan);
if (err) if (err)
return err; return err;
rhashtable_init(&ilan->rhash_table, &rht_params); rhashtable_init(&ilan->xlat.rhash_table, &rht_params);
return 0; return 0;
} }
static __net_exit void ila_exit_net(struct net *net) void ila_xlat_exit_net(struct net *net)
{ {
struct ila_net *ilan = net_generic(net, ila_net_id); struct ila_net *ilan = net_generic(net, ila_net_id);
rhashtable_free_and_destroy(&ilan->rhash_table, ila_free_cb, NULL); rhashtable_free_and_destroy(&ilan->xlat.rhash_table, ila_free_cb, NULL);
free_bucket_spinlocks(ilan->locks); free_bucket_spinlocks(ilan->xlat.locks);
if (ilan->hooks_registered) if (ilan->xlat.hooks_registered)
nf_unregister_net_hooks(net, ila_nf_hook_ops, nf_unregister_net_hooks(net, ila_nf_hook_ops,
ARRAY_SIZE(ila_nf_hook_ops)); ARRAY_SIZE(ila_nf_hook_ops));
} }
static struct pernet_operations ila_net_ops = {
.init = ila_init_net,
.exit = ila_exit_net,
.id = &ila_net_id,
.size = sizeof(struct ila_net),
};
static int ila_xlat_addr(struct sk_buff *skb, bool sir2ila) static int ila_xlat_addr(struct sk_buff *skb, bool sir2ila)
{ {
struct ila_map *ila; struct ila_map *ila;
@ -667,28 +606,3 @@ static int ila_xlat_addr(struct sk_buff *skb, bool sir2ila)
return 0; return 0;
} }
int __init ila_xlat_init(void)
{
int ret;
ret = register_pernet_device(&ila_net_ops);
if (ret)
goto exit;
ret = genl_register_family(&ila_nl_family);
if (ret < 0)
goto unregister;
return 0;
unregister:
unregister_pernet_device(&ila_net_ops);
exit:
return ret;
}
void ila_xlat_fini(void)
{
genl_unregister_family(&ila_nl_family);
unregister_pernet_device(&ila_net_ops);
}