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path: root/net/sunrpc/netns.h
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2013-08-07SUNRPC: If the rpcbind channel is disconnected, fail the call to unregisterTrond Myklebust
If rpcbind causes our connection to the AF_LOCAL socket to close after we've registered a service, then we want to be careful about reconnecting since the mount namespace may have changed. By simply refusing to reconnect the AF_LOCAL socket in the case of unregister, we avoid the need to somehow save the mount namespace. While this may lead to some services not unregistering properly, it should be safe. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> Cc: Nix <nix@esperi.org.uk> Cc: Jeff Layton <jlayton@redhat.com> Cc: stable@vger.kernel.org # 3.9.x
2013-05-16SUNRPC: Convert auth_gss pipe detection to work in namespacesTrond Myklebust
This seems to have been overlooked when we did the namespace conversion. If a container is running a legacy version of rpc.gssd then it will be disrupted if the global 'pipe_version' is set by a container running the new version of rpc.gssd. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2013-05-16SUNRPC: Faster detection if gssd is actually runningTrond Myklebust
Recent changes to the NFS security flavour negotiation mean that we have a stronger dependency on rpc.gssd. If the latter is not running, because the user failed to start it, then we time out and mark the container as not having an instance. We then use that information to time out faster the next time. If, on the other hand, the rpc.gssd successfully binds to an rpc_pipe, then we mark the container as having an rpc.gssd instance. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2013-04-26SUNRPC: Use gssproxy upcall for server RPCGSS authentication.Simo Sorce
The main advantge of this new upcall mechanism is that it can handle big tickets as seen in Kerberos implementations where tickets carry authorization data like the MS-PAC buffer with AD or the Posix Authorization Data being discussed in IETF on the krbwg working group. The Gssproxy program is used to perform the accept_sec_context call on the kernel's behalf. The code is changed to also pass the input buffer straight to upcall mechanism to avoid allocating and copying many pages as tokens can be as big (potentially more in future) as 64KiB. Signed-off-by: Simo Sorce <simo@redhat.com> [bfields: containerization, negotiation api] Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2013-04-26SUNRPC: Add RPC based upcall mechanism for RPCGSS authSimo Sorce
This patch implements a sunrpc client to use the services of the gssproxy userspace daemon. In particular it allows to perform calls in user space using an RPC call instead of custom hand-coded upcall/downcall messages. Currently only accept_sec_context is implemented as that is all is needed for the server case. File server modules like NFS and CIFS can use full gssapi services this way, once init_sec_context is also implemented. For the NFS server case this code allow to lift the limit of max 2k krb5 tickets. This limit is prevents legitimate kerberos deployments from using krb5 authentication with the Linux NFS server as they have normally ticket that are many kilobytes large. It will also allow to lift the limitation on the size of the credential set (uid,gid,gids) passed down from user space for users that have very many groups associated. Currently the downcall mechanism used by rpc.svcgssd is limited to around 2k secondary groups of the 65k allowed by kernel structures. Signed-off-by: Simo Sorce <simo@redhat.com> [bfields: containerization, concurrent upcalls, misc. fixes and cleanup] Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2012-01-31SUNRPC: create GSS auth cache per network namespaceStanislav Kinsbursky
This patch makes GSS auth cache details allocated and registered per network namespace context. Thus with this patch rsi_cache and rsc_cache contents for network namespace "X" are controlled from proc file system mount for the same network namespace "X". Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> Acked-by: J. Bruce Fields <bfields@redhat.com>
2012-01-31SUNRPC: create unix gid cache per network namespaceStanislav Kinsbursky
v2: 1) fixed silly usage of template cache as a real one (this code left from static global cache for all) This patch makes unix_gid_cache cache detail allocated and registered per network namespace context. Thus with this patch unix_gid_cache contents for network namespace "X" are controlled from proc file system mount for the same network namespace "X". Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> Acked-by: J. Bruce Fields <bfields@redhat.com>
2012-01-31SUNRPC: move rpcbind internals to sunrpc part of network namespace contextStanislav Kinsbursky
This patch makes rpcbind logic works in network namespace context. IOW each network namespace will have it's own unique rpcbind internals (clients and friends) required for registering svc services per network namespace. Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-01-31SUNRPC: make SUNPRC clients list per network namespace contextStanislav Kinsbursky
This patch moves static SUNRPC clients list and it's lock to sunrpc_net structure. Currently this list is used only for debug purposes. But later it will be used also for selecting clients by networks namespace on PipeFS mount/umount events. Per-network namespace lists will make this faster and simplier. Note: client list is taken from "init_net" network namespace context in rpc_show_tasks(). This will be changed some day later with making SUNRPC sysctl's per network namespace context. Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-01-31SUNRPC: pipefs per-net operations helper introducedStanislav Kinsbursky
During per-net pipes creation and destruction we have to make sure, that pipefs sb exists for the whole creation/destruction cycle. This is done by using special mutex which controls pipefs sb reference on network namespace context. Helper consists of two parts: first of them (rpc_get_dentry_net) searches for dentry with specified name and returns with mutex taken on success. When pipe creation or destructions is completed, caller should release this mutex by rpc_put_dentry_net call. Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-01-31SUNRPC: put pipefs superblock link on network namespaceStanislav Kinsbursky
We have modules (like, pNFS blocklayout module) which creates pipes on rpc_pipefs. Thus we need per-net operations for them. To make it possible we require appropriate super block. So we have to put sb link on network namespace context. Note, that it's not strongly required to create pipes in per-net operations. IOW, if pipefs wasn't mounted yet, that no sb link reference will present on network namespace and in this case we need just need to pass through pipe creation. Pipe dentry will be created during pipefs mount notification. Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-09-27sunrpc: Make the ip_map_cache be per-netPavel Emelyanov
Everything that is required for that already exists: * the per-net cache registration with respective proc entries * the context (struct net) is available in all the users Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2010-09-27sunrpc: Make the /proc/net/rpc appear in net namespacesPavel Emelyanov
Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2010-09-27sunrpc: The per-net skeletonPavel Emelyanov
Register empty per-net operations for the sunrpc layer. Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: J. Bruce Fields <bfields@redhat.com>