Commit Graph

36 Commits

Author SHA1 Message Date
Chuck Lever 65b80179f9 xprtrdma: No direct data placement with krb5i and krb5p
Direct data placement is not allowed when using flavors that
guarantee integrity or privacy. When such security flavors are in
effect, don't allow the use of Read and Write chunks for moving
individual data items. All messages larger than the inline threshold
are sent via Long Call or Long Reply.

On my systems (CX-3 Pro on FDR), for small I/O operations, the use
of Long messages adds only around 5 usecs of latency in each
direction.

Note that when integrity or encryption is used, the host CPU touches
every byte in these messages. Even if it could be used, data
movement offload doesn't buy much in this case.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Tested-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2016-07-11 15:50:43 -04:00
Jeff Layton f895b252d4 sunrpc: eliminate RPC_DEBUG
It's always set to whatever CONFIG_SUNRPC_DEBUG is, so just use that.

Signed-off-by: Jeff Layton <jlayton@primarydata.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2014-11-24 17:31:46 -05:00
Trond Myklebust 7a9a7b774f SUNRPC: Fix a module reference issue in rpcsec_gss
We're not taking a reference in the case where _gss_mech_get_by_pseudoflavor
loops without finding the correct rpcsec_gss flavour, so why are we
releasing it?

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2014-05-18 13:47:14 -04:00
J. Bruce Fields 0dc1531aca svcrpc: store gss mech in svc_cred
Store a pointer to the gss mechanism used in the rq_cred and cl_cred.
This will make it easier to enforce SP4_MACH_CRED, which needs to
compare the mechanism used on the exchange_id with that used on
protected operations.

Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2013-07-01 17:23:06 -04:00
J. Bruce Fields b1df763723 Merge branch 'nfs-for-next' of git://linux-nfs.org/~trondmy/nfs-2.6 into for-3.10
Note conflict: Chuck's patches modified (and made static)
gss_mech_get_by_OID, which is still needed by gss-proxy patches.

The conflict resolution is a bit minimal; we may want some more cleanup.
2013-04-29 16:23:34 -04:00
Simo Sorce 400f26b542 SUNRPC: conditionally return endtime from import_sec_context
We expose this parameter for a future caller.
It will be used to extract the endtime from the gss-proxy upcall mechanism,
in order to set the rsc cache expiration time.

Signed-off-by: Simo Sorce <simo@redhat.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2013-04-26 11:41:27 -04:00
Chuck Lever 5007220b87 SUNRPC: Remove EXPORT_SYMBOL_GPL() from GSS mech switch
Clean up: Reduce the symbol table footprint for auth_rpcgss.ko by
removing exported symbols for functions that are no longer used
outside of auth_rpcgss.ko.

The remaining two EXPORTs in gss_mech_switch.c get documenting
comments.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2013-03-29 15:43:41 -04:00
Chuck Lever 6599c0acae SUNRPC: Make gss_mech_get() static
gss_mech_get() is no longer used outside of gss_mech_switch.c.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2013-03-29 15:43:39 -04:00
Chuck Lever a77c806fb9 SUNRPC: Refactor nfsd4_do_encode_secinfo()
Clean up.  This matches a similar API for the client side, and
keeps ULP fingers out the of the GSS mech switch.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Acked-by: J. Bruce Fields <bfields@redhat.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2013-03-29 15:43:33 -04:00
Chuck Lever 83523d083a SUNRPC: Consider qop when looking up pseudoflavors
The NFSv4 SECINFO operation returns a list of security flavors that
the server supports for a particular share.  An NFSv4 client is
supposed to pick a pseudoflavor it supports that corresponds to one
of the flavors returned by the server.

GSS flavors in this list have a GSS tuple that identify a specific
GSS pseudoflavor.

Currently our client ignores the GSS tuple's "qop" value.  A
matching pseudoflavor is chosen based only on the OID and service
value.

So far this omission has not had much effect on Linux.  The NFSv4
protocol currently supports only one qop value: GSS_C_QOP_DEFAULT,
also known as zero.

However, if an NFSv4 server happens to return something other than
zero in the qop field, our client won't notice.  This could cause
the client to behave in incorrect ways that could have security
implications.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2013-03-29 15:43:24 -04:00
Chuck Lever f783288f0c SUNRPC: Load GSS kernel module by OID
The current GSS mech switch can find and load GSS pseudoflavor
modules by name ("krb5") or pseudoflavor number ("390003"), but
cannot find GSS modules by GSS tuple:

  [ "1.2.840.113554.1.2.2", GSS_C_QOP_DEFAULT, RPC_GSS_SVC_NONE ]

This is important when dealing with a SECINFO request.  A SECINFO
reply contains a list of flavors the server supports for the
requested export, but GSS flavors also have a GSS tuple that maps
to a pseudoflavor (like 390003 for krb5).

If the GSS module that supports the OID in the tuple is not loaded,
our client is not able to load that module dynamically to support
that pseudoflavor.

Add a way for the GSS mech switch to load GSS pseudoflavor support
by OID before searching for the pseudoflavor that matches the OID
and service.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Cc: David Howells <dhowells@redhat.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2013-03-29 15:43:18 -04:00
Chuck Lever 9568c5e9a6 SUNRPC: Introduce rpcauth_get_pseudoflavor()
A SECINFO reply may contain flavors whose kernel module is not
yet loaded by the client's kernel.  A new RPC client API, called
rpcauth_get_pseudoflavor(), is introduced to do proper checking
for support of a security flavor.

When this API is invoked, the RPC client now tries to load the
module for each flavor first before performing the "is this
supported?" check.  This means if a module is available on the
client, but has not been loaded yet, it will be loaded and
registered automatically when the SECINFO reply is processed.

The new API can take a full GSS tuple (OID, QoP, and service).
Previously only the OID and service were considered.

nfs_find_best_sec() is updated to verify all flavors requested in a
SECINFO reply, including AUTH_NULL and AUTH_UNIX.  Previously these
two flavors were simply assumed to be supported without consulting
the RPC client.

Note that the replaced version of nfs_find_best_sec() can return
RPC_AUTH_MAXFLAVOR if the server returns a recognized OID but an
unsupported "service" value.  nfs_find_best_sec() now returns
RPC_AUTH_UNIX in this case.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2013-03-29 15:43:07 -04:00
Trond Myklebust c5f5e9c5d2 SUNRPC: Add missing static declaration to _gss_mech_get_by_name
Ditto for _gss_mech_get_by_pseudoflavor.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2013-02-01 10:13:48 -05:00
Trond Myklebust 013448c59b SUNRPC: Add a missing spin_unlock to gss_mech_list_pseudoflavors
The patch "SUNRPC: Add rpcauth_list_flavors()" introduces a new error
path in gss_mech_list_pseudoflavors, but fails to release the spin lock.

Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-07-17 17:02:57 -04:00
Chuck Lever 6a1a1e34dc SUNRPC: Add rpcauth_list_flavors()
The gss_mech_list_pseudoflavors() function provides a list of
currently registered GSS pseudoflavors.  This list does not include
any non-GSS flavors that have been registered with the RPC client.
nfs4_find_root_sec() currently adds these extra flavors by hand.

Instead, nfs4_find_root_sec() should be looking at the set of flavors
that have been explicitly registered via rpcauth_register().  And,
other areas of code will soon need the same kind of list that
contains all flavors the kernel currently knows about (see below).

Rather than cloning the open-coded logic in nfs4_find_root_sec() to
those new places, introduce a generic RPC function that generates a
full list of registered auth flavors and pseudoflavors.

A new rpc_authops method is added that lists a flavor's
pseudoflavors, if it has any.  I encountered an interesting module
loader loop when I tried to get the RPC client to invoke
gss_mech_list_pseudoflavors() by name.

This patch is a pre-requisite for server trunking discovery, and a
pre-requisite for fixing up the in-kernel mount client to do better
automatic security flavor selection.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-07-16 15:12:15 -04:00
Steve Dickson 7bdf7415a6 auth_gss: the list of pseudoflavors not being parsed correctly
gss_mech_list_pseudoflavors() parses a list of registered mechanisms.
On that list contains a list of pseudo flavors which was not being
parsed correctly, causing only the first pseudo flavor to be found.

Signed-off-by: Steve Dickson <steved@redhat.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-05-03 12:35:33 -04:00
J. Bruce Fields 058c5c9999 rpc: allow autoloading of gss mechanisms
Remove the need for an explicit modprobe of rpcsec_gss_krb5.

Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2011-07-15 18:58:45 -04:00
Bryan Schumaker 8f70e95f9f NFS: Determine initial mount security
When sec=<something> is not presented as a mount option,
we should attempt to determine what security flavor the
server is using.

Signed-off-by: Bryan Schumaker <bjschuma@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2011-03-24 13:52:42 -04:00
Bryan Schumaker 7ebb931598 NFS: use secinfo when crossing mountpoints
A submount may use different security than the parent
mount does.  We should figure out what sec flavor the
submount uses at mount time.

Signed-off-by: Bryan Schumaker <bjschuma@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2011-03-24 13:52:42 -04:00
Eric Dumazet a02cec2155 net: return operator cleanup
Change "return (EXPR);" to "return EXPR;"

return is not a function, parentheses are not required.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2010-09-23 14:33:39 -07:00
Trond Myklebust 1f4c86c0be NFS: Don't use GFP_KERNEL in rpcsec_gss downcalls
Again, we can deadlock if the memory reclaim triggers a writeback that
requires a rpcsec_gss credential lookup.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-05-14 15:09:33 -04:00
Kevin Coffman 7561042fb7 gss_krb5: Added and improved code comments
Signed-off-by: Steve Dickson <steved@redhat.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-05-14 15:09:15 -04:00
Trond Myklebust b891e4a05e SUNRPC: Fix the return value in gss_import_sec_context()
If the context allocation fails, it will return GSS_S_FAILURE, which is
neither a valid error code, nor is it even negative.

Return ENOMEM instead...

Reported-by: Jeff Layton <jlayton@redhat.com>
Cc: stable@kernel.org
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-12-18 16:28:12 -05:00
Trond Myklebust 7bd8826915 SUNRPC: rpcsec_gss modules should not be used by out-of-tree code
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-12-23 15:21:32 -05:00
Al Viro 27724426a9 [SUNRPC]: net/* NULL noise
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-03-17 22:48:03 -07:00
Andy Adamson c4170583f6 knfsd: nfsd4: store pseudoflavor in request
Add a new field to the svc_rqst structure to record the pseudoflavor that the
request was made with.  For now we record the pseudoflavor but don't use it
for anything.

Signed-off-by: Andy Adamson <andros@citi.umich.edu>
Signed-off-by: "J. Bruce Fields" <bfields@citi.umich.edu>
Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-17 10:23:07 -07:00
Trond Myklebust d9bc125caf Merge branch 'master' of /home/trondmy/kernel/linux-2.6/
Conflicts:

	net/sunrpc/auth_gss/gss_krb5_crypto.c
	net/sunrpc/auth_gss/gss_spkm3_token.c
	net/sunrpc/clnt.c

Merge with mainline and fix conflicts.
2007-02-12 22:43:25 -08:00
YOSHIFUJI Hideaki cca5172a7e [NET] SUNRPC: Fix whitespace errors.
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-02-10 23:20:13 -08:00
Chuck Lever 8885cb367f SUNRPC: fix print format for tk_pid in auth_gss support
The tk_pid field is an unsigned short.  The proper print format specifier for
that type is %5u, not %4d.

Also clean up some miscellaneous print formatting nits.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2007-02-03 15:35:09 -08:00
Panagiotis Issaris 0da974f4f3 [NET]: Conversions from kmalloc+memset to k(z|c)alloc.
Signed-off-by: Panagiotis Issaris <takis@issaris.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-07-21 14:51:30 -07:00
J. Bruce Fields 1df0cada03 [PATCH] knfsd: svcrpc: gss: simplify rsc_parse()
Adopt a simpler convention for gss_mech_put(), to simplify rsc_parse().

Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-30 11:25:40 -07:00
Jesper Juhl a51482bde2 [NET]: kfree cleanup
From: Jesper Juhl <jesper.juhl@gmail.com>

This is the net/ part of the big kfree cleanup patch.

Remove pointless checks for NULL prior to calling kfree() in net/.

Signed-off-by: Jesper Juhl <jesper.juhl@gmail.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Arnaldo Carvalho de Melo <acme@conectiva.com.br>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Acked-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
2005-11-08 09:41:34 -08:00
J. Bruce Fields 00fd6e1425 RPCSEC_GSS remove all qop parameters
Not only are the qop parameters that are passed around throughout the gssapi
 unused by any currently implemented mechanism, but there appears to be some
 doubt as to whether they will ever be used.  Let's just kill them off for now.

 Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
 Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2005-10-18 23:19:47 -07:00
J. Bruce Fields 293f1eb551 SUNRPC: Add support for privacy to generic gss-api code.
Add support for privacy to generic gss-api code.  This is dead code until we
 have both a mechanism that supports privacy and code in the client or server
 that uses it.

 Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
 Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2005-10-18 23:19:42 -07:00
Chuck Lever 86b9f57dfd [PATCH] RPC: Eliminate socket.h includes in RPC client
Clean-up: get rid of unnecessary socket.h and in.h includes in the generic
 parts of the RPC client.

 Test-plan:
 Compile kernel with CONFIG_NFS enabled.

 Version: Thu, 11 Aug 2005 16:06:23 -0400

 Signed-off-by: Chuck Lever <cel@netapp.com>
 Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2005-09-23 12:38:23 -04:00
Linus Torvalds 1da177e4c3 Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!
2005-04-16 15:20:36 -07:00