[Linux-kernel-mentees] [PATCH v2 3/5] Documentation: nfs: rpc-server-gss: convert to ReST
From: "Daniel W. S. Almeida" <dwlsalmeida@gmail.com>
Date: 2020-01-29 04:49:35
Also in:
linux-doc
Subsystem:
documentation, kernel nfsd, sunrpc, and lockd servers, nfs, sunrpc, and lockd clients, the rest · Maintainers:
Jonathan Corbet, Chuck Lever, Jeff Layton, Trond Myklebust, Anna Schumaker, Linus Torvalds
From: "Daniel W. S. Almeida" <dwlsalmeida@gmail.com>
Convert rpc-server-gss.txt to ReST. Content remains mostly unchanged.
Signed-off-by: Daniel W. S. Almeida <dwlsalmeida@gmail.com>
---
Documentation/filesystems/nfs/index.rst | 1 +
...{rpc-server-gss.txt => rpc-server-gss.rst} | 19 +++++++++++--------
2 files changed, 12 insertions(+), 8 deletions(-)
rename Documentation/filesystems/nfs/{rpc-server-gss.txt => rpc-server-gss.rst} (92%)
diff --git a/Documentation/filesystems/nfs/index.rst b/Documentation/filesystems/nfs/index.rst
index 52f4956e7770..9d5365cbe2c3 100644
--- a/Documentation/filesystems/nfs/index.rst
+++ b/Documentation/filesystems/nfs/index.rst@@ -8,3 +8,4 @@ NFS pnfs rpc-cache + rpc-server-gss
diff --git a/Documentation/filesystems/nfs/rpc-server-gss.txt b/Documentation/filesystems/nfs/rpc-server-gss.rst
similarity index 92%
rename from Documentation/filesystems/nfs/rpc-server-gss.txt
rename to Documentation/filesystems/nfs/rpc-server-gss.rst
index 310bbbaf9080..812754576845 100644
--- a/Documentation/filesystems/nfs/rpc-server-gss.txt
+++ b/Documentation/filesystems/nfs/rpc-server-gss.rst@@ -1,4 +1,4 @@ - +========================================= rpcsec_gss support for kernel RPC servers =========================================
@@ -9,14 +9,17 @@ NFSv4.1 and higher don't require the client to act as a server for the purposes of authentication.) RPCGSS is specified in a few IETF documents: + - RFC2203 v1: http://tools.ietf.org/rfc/rfc2203.txt - RFC5403 v2: http://tools.ietf.org/rfc/rfc5403.txt + and there is a 3rd version being proposed: + - http://tools.ietf.org/id/draft-williams-rpcsecgssv3.txt (At draft n. 02 at the time of writing) Background ----------- +========== The RPCGSS Authentication method describes a way to perform GSSAPI Authentication for NFS. Although GSSAPI is itself completely mechanism
@@ -29,6 +32,7 @@ depends on GSSAPI extensions that are KRB5 specific. GSSAPI is a complex library, and implementing it completely in kernel is unwarranted. However GSSAPI operations are fundementally separable in 2 parts: + - initial context establishment - integrity/privacy protection (signing and encrypting of individual packets)
@@ -41,7 +45,7 @@ kernel, but leave the initial context establishment to userspace. We need upcalls to request userspace to perform context establishment. NFS Server Legacy Upcall Mechanism ----------------------------------- +================================== The classic upcall mechanism uses a custom text based upcall mechanism to talk to a custom daemon called rpc.svcgssd that is provide by the
@@ -62,21 +66,20 @@ groups) due to limitation on the size of the buffer that can be send back to the kernel (4KiB). NFS Server New RPC Upcall Mechanism ------------------------------------ +=================================== The newer upcall mechanism uses RPC over a unix socket to a daemon called gss-proxy, implemented by a userspace program called Gssproxy. -The gss_proxy RPC protocol is currently documented here: - - https://fedorahosted.org/gss-proxy/wiki/ProtocolDocumentation +The gss_proxy RPC protocol is currently documented `here +<https://fedorahosted.org/gss-proxy/wiki/ProtocolDocumentation>`_. This upcall mechanism uses the kernel rpc client and connects to the gssproxy userspace program over a regular unix socket. The gssproxy protocol does not suffer from the size limitations of the legacy protocol. Negotiating Upcall Mechanisms ------------------------------ +============================= To provide backward compatibility, the kernel defaults to using the legacy mechanism. To switch to the new mechanism, gss-proxy must bind
--
2.25.0
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