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xfrm: place af number into xfrm_mode struct

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This will be useful to know if we're supposed to decode ipv4 or ipv6.

While at it, make the unregister function return void, all module_exit
functions did just BUG(); there is never a point in doing error checks
if there is no way to handle such error.

Signed-off-by: Florian Westphal <fw@strlen.de>
Reviewed-by: Sabrina Dubroca <sd@queasysnail.net>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
This commit is contained in:
Florian Westphal
2019-03-29 21:16:22 +01:00
committed by Steffen Klassert
parent f981c57ffd
commit b262a69582
9 changed files with 32 additions and 52 deletions
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19
net/xfrm/xfrm_state.c
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@@ -331,7 +331,7 @@ static void xfrm_put_type_offload(const struct xfrm_type_offload *type)
}
static DEFINE_SPINLOCK(xfrm_mode_lock);
int xfrm_register_mode(struct xfrm_mode *mode, int family)
int xfrm_register_mode(struct xfrm_mode *mode)
{
struct xfrm_state_afinfo *afinfo;
struct xfrm_mode **modemap;
@@ -340,7 +340,7 @@ int xfrm_register_mode(struct xfrm_mode *mode, int family)
if (unlikely(mode->encap >= XFRM_MODE_MAX))
return -EINVAL;
afinfo = xfrm_state_get_afinfo(family);
afinfo = xfrm_state_get_afinfo(mode->family);
if (unlikely(afinfo == NULL))
return -EAFNOSUPPORT;
@@ -365,31 +365,24 @@ out:
}
EXPORT_SYMBOL(xfrm_register_mode);
int xfrm_unregister_mode(struct xfrm_mode *mode, int family)
void xfrm_unregister_mode(struct xfrm_mode *mode)
{
struct xfrm_state_afinfo *afinfo;
struct xfrm_mode **modemap;
int err;
if (unlikely(mode->encap >= XFRM_MODE_MAX))
return -EINVAL;
afinfo = xfrm_state_get_afinfo(mode->family);
if (WARN_ON_ONCE(!afinfo))
return;
afinfo = xfrm_state_get_afinfo(family);
if (unlikely(afinfo == NULL))
return -EAFNOSUPPORT;
err = -ENOENT;
modemap = afinfo->mode_map;
spin_lock_bh(&xfrm_mode_lock);
if (likely(modemap[mode->encap] == mode)) {
modemap[mode->encap] = NULL;
module_put(mode->afinfo->owner);
err = 0;
}
spin_unlock_bh(&xfrm_mode_lock);
rcu_read_unlock();
return err;
}
EXPORT_SYMBOL(xfrm_unregister_mode);