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| author | Robert Watson <rwatson@FreeBSD.org> | 2009-08-25 09:52:38 +0000 |
|---|---|---|
| committer | Robert Watson <rwatson@FreeBSD.org> | 2009-08-25 09:52:38 +0000 |
| commit | dc56e98f0d95e809a1044d38f86dd9e734857fe0 (patch) | |
| tree | 4a34d8a5aab4678ff905e0a94bd345c9b1c8d805 /sys/net/if_llatbl.h | |
| parent | 18159f6a492148603a5338751a65286ef724dec2 (diff) | |
| download | src-dc56e98f0d95e809a1044d38f86dd9e734857fe0.tar.gz src-dc56e98f0d95e809a1044d38f86dd9e734857fe0.zip | |
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
Notes
Notes:
svn path=/head/; revision=196535
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 4d721efc35f7..f54c78ad8a28 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 |