[Devel] [RFC PATCH 0/4] SUNRPC: rework cache upcall to avoid NFSd root swapping

[Stanislav Kinsbursky]

The main idea of this patch set is to call cache request not on kthread
upcall, but on userspace daemon cache_read call. This fixes the problem with
gaining of wrong dentry path after calling d_path() in kthread root context
(svc_export_request() callback), which always work in init root context, but
containers can work in "root jail" - i.e. have it's own nested root.

The following series implements...

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Stanislav Kinsbursky (4):
      SUNRPC: introduce cache_detail->cache_request callback
      SUNRPC: remove cache_detail->cache_upcall callback
      SUNRPC: remove "cache_request" argument in sunrpc_cache_pipe_upcall() function
      SUNRPC: move cache_detail->cache_request callback call to cache_read()


 fs/nfs/dns_resolve.c              |    2 +-
 fs/nfsd/export.c                  |   14 ++----------
 fs/nfsd/nfs4idmap.c               |   16 ++-----------
 include/linux/sunrpc/cache.h      |   11 +++------
 net/sunrpc/auth_gss/svcauth_gss.c |    8 +------
 net/sunrpc/cache.c                |   44 ++++++++++++++++++++-----------------
 net/sunrpc/svcauth_unix.c         |   14 ++----------
 7 files changed, 36 insertions(+), 73 deletions(-)