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| author | cinap_lenrek <cinap_lenrek@felloff.net> | 2022-02-16 22:31:31 +0000 |
|---|---|---|
| committer | cinap_lenrek <cinap_lenrek@felloff.net> | 2022-02-16 22:31:31 +0000 |
| commit | 7289f371a0b113c12add274c4d4aa84d0c147dee (patch) | |
| tree | caaadea3c6dff299367b9079558141efc2f1ea65 /sys/src/9/port/devbridge.c | |
| parent | 755880b19f365c3f98eac5c7de1d8b25f773ace3 (diff) | |
devip: dont hold ifc wlock during medium bind/unbind
Wlock()'ing the ifc causes a deadlock with Medium
bind/unbind as the routine can walk /net, while
ndb/dns or ndb/cs are currently blocked enumerating
/net/ipifc/*.
The fix is to have a fake medium, called "unbound",
that is set temporarily during the call of Medium
bind and unbind.
That way, the interface rwlock can be released while
bind/unbind is in progress.
The ipifcunbind() routine will refuse to unbind a
ifc that is currently assigned to the "unbound"
medium, preventing any accidents.
Diffstat (limited to 'sys/src/9/port/devbridge.c')
0 files changed, 0 insertions, 0 deletions