[PATCH 0/7] cifs.upcall: fixes and improvements for SPNEGO upcalls

This set is a series of patches to fix several problems with
cifs.upcall. There are a few behavioral changes with this set:

1) nerf the "-c" option, which was just confusing for users. It now
tries to get a cifs/ principal first and then falls back to a host/
prefix if that fails. I think it's safe to assume that if a cifs/
principal exists then that's the one we'll want to use. If that's
incorrect, please let me know.

2) to get the hostname for the service principal, it now
reverse-resolves the IP address passed by the kernel. This makes the
code much less sensitive to the hostname used when mounting.

It also adds some cleanup to the code and some debug-level logging that
can be used for troubleshooting problems.

Review appreciated.

Jeff Layton (7):
  cifs.upcall: clean up logging and add debug messages
  cifs.upcall: formatting cleanup
  cifs.upcall: declare a structure for holding decoded args
  cifs.upcall: try getting a "cifs/" principal and fall back to "host/"
  cifs.upcall: clean up flag handling
  cifs.upcall: use ip address passed by kernel to get server's hostname
  cifs.upcall: fix IPv6 addrs sent to upcall to have colon delimiters

 client/cifs.upcall.c                  |  319 +++++++++++++++++++++------------
 docs-xml/manpages-3/cifs.upcall.8.xml |    4 +-
 2 files changed, 202 insertions(+), 121 deletions(-)