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| author | rwatson <rwatson@FreeBSD.org> | 2009-08-25 09:52:38 +0000 |
|---|---|---|
| committer | rwatson <rwatson@FreeBSD.org> | 2009-08-25 09:52:38 +0000 |
| commit | 544dfa0789561f2dbb98a7740453fce7aeea4f5b (patch) | |
| tree | 4a34d8a5aab4678ff905e0a94bd345c9b1c8d805 /sys/net/if_llatbl.h | |
| parent | 6aac59f9fa910996e553304fbd819aedc2abb25d (diff) | |
| download | FreeBSD-src-544dfa0789561f2dbb98a7740453fce7aeea4f5b.zip FreeBSD-src-544dfa0789561f2dbb98a7740453fce7aeea4f5b.tar.gz | |
Use locks specific to the lltable code, rather than borrow the ifnet
list/index locks, to protect link layer address tables. This avoids
lock order issues during interface teardown, but maintains the bug that
sysctl copy routines may be called while a non-sleepable lock is held.
Reviewed by: bz, kmacy
MFC after: 3 days
Diffstat (limited to 'sys/net/if_llatbl.h')
| -rw-r--r-- | sys/net/if_llatbl.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/sys/net/if_llatbl.h b/sys/net/if_llatbl.h index 4d721ef..f54c78a 100644 --- a/sys/net/if_llatbl.h +++ b/sys/net/if_llatbl.h @@ -41,6 +41,13 @@ struct rt_addrinfo; struct llentry; LIST_HEAD(llentries, llentry); +extern struct rwlock lltable_rwlock; +#define LLTABLE_RLOCK() rw_rlock(&lltable_rwlock) +#define LLTABLE_RUNLOCK() rw_runlock(&lltable_rwlock) +#define LLTABLE_WLOCK() rw_wlock(&lltable_rwlock) +#define LLTABLE_WUNLOCK() rw_wunlock(&lltable_rwlock) +#define LLTABLE_LOCK_ASSERT() rw_assert(&lltable_rwlock, RA_LOCKED) + /* * Code referencing llentry must at least hold * a shared lock |
