[Differential] [Request, 100 lines] D1315: VIMAGE PF fixes #4

[rodrigc (Craig Rodrigues)]

rodrigc created this revision.
rodrigc added reviewers: bz, glebius, trociny, network.
rodrigc added subscribers: freebsd-net, freebsd-pf, freebsd-virtualization.

REVISION SUMMARY
  Instead of creating a purge thread for every vnet, create
  a single purge thread and clean up all vnets from this thread.

TEST PLAN
  (1)  Boot a kernel with VIMAGE enabled
  (2)  Create a vnet jail
           jail -c persist name=testjail001 vnet path=/ host.hostname=testjail001 allow.raw_sockets allow.socket_af
  
  (3)  Start pf inside the jail
          service start pf
  
  (4)  Delete the vnet jail
          jail -r testjail001
  
  Without this patch, the kernel would panic in step (4).  With the patch,
  the kernel does not panic

REVISION DETAIL
  https://reviews.freebsd.org/D1315

AFFECTED FILES
  sys/net/pfvar.h
  sys/netpfil/pf/pf.c
  sys/netpfil/pf/pf_ioctl.c

To: rodrigc, bz, glebius, trociny, np, melifaro, hrs, wollman, bryanv, rpaulo, adrian, gnn, hiren, rwatson
Cc: freebsd-virtualization, freebsd-pf, freebsd-net