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2010-08-14include: replace unifdef-y with header-ySam Ravnborg
unifdef-y and header-y has same semantic. So there is no need to have both. Drop the unifdef-y variant and sort all lines again Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
2010-08-07Merge branch 'for-2.6.36' of git://linux-nfs.org/~bfields/linuxLinus Torvalds
* 'for-2.6.36' of git://linux-nfs.org/~bfields/linux: (34 commits) nfsd4: fix file open accounting for RDWR opens nfsd: don't allow setting maxblksize after svc created nfsd: initialize nfsd versions before creating svc net: sunrpc: removed duplicated #include nfsd41: Fix a crash when a callback is retried nfsd: fix startup/shutdown order bug nfsd: minor nfsd read api cleanup gcc-4.6: nfsd: fix initialized but not read warnings nfsd4: share file descriptors between stateid's nfsd4: fix openmode checking on IO using lock stateid nfsd4: miscellaneous process_open2 cleanup nfsd4: don't pretend to support write delegations nfsd: bypass readahead cache when have struct file nfsd: minor nfsd_svc() cleanup nfsd: move more into nfsd_startup() nfsd: just keep single lockd reference for nfsd nfsd: clean up nfsd_create_serv error handling nfsd: fix error handling in __write_ports_addxprt nfsd: fix error handling when starting nfsd with rpcbind down nfsd4: fix v4 state shutdown error paths ...
2010-08-04SUNRPC: Move the bound cred to struct rpc_rqstTrond Myklebust
This will allow us to save the original generic cred in rpc_message, so that if we migrate from one server to another, we can generate a new bound cred without having to punt back to the NFS layer. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-08-04SUNRPC: Clean up of rpc_bindcred()Trond Myklebust
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-08-04SUNRPC: Move remaining RPC client related task initialisation into clnt.cTrond Myklebust
Now that rpc_run_task() is the sole entry point for RPC calls, we can move the remaining rpc_client-related initialisation of struct rpc_task from sched.c into clnt.c. Also move rpc_killall_tasks() into the same file, since that too is relative to the rpc_clnt. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-08-04SUNRPC: Ensure that rpc_exit() always wakes up a sleeping taskTrond Myklebust
Make rpc_exit() non-inline, and ensure that it always wakes up a task that has been queued. Kill off the now unused rpc_wake_up_task(). Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-08-04SUNRPC: Make the credential cache hashtable size configurableTrond Myklebust
This patch allows the user to configure the credential cache hashtable size using a new module parameter: auth_hashtable_size When set, this parameter will be rounded up to the nearest power of two, with a maximum allowed value of 1024 elements. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-08-04SUNRPC: Store the hashtable size in struct rpc_cred_cacheTrond Myklebust
Cleanup in preparation for allowing the user to determine the maximum hash table size. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-08-04NFS: Ensure the AUTH_UNIX credcache is allocated dynamicallyTrond Myklebust
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-08-03SUNRPC: The function rpc_restart_call() should return success/failureTrond Myklebust
Both rpc_restart_call_prepare() and rpc_restart_call() test for the RPC_TASK_KILLED flag, and fail to restart the RPC call if that flag is set. This patch allows callers to know whether or not the restart was successful, so that they can perform cleanups etc in case of failure. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-07-06sunrpc: make the cache cleaner workqueue deferrableArtem Bityutskiy
This patch makes the cache_cleaner workqueue deferrable, to prevent unnecessary system wake-ups, which is very important for embedded battery-powered devices. do_cache_clean() is called every 30 seconds at the moment, and often makes the system wake up from its power-save sleep state. With this change, when the workqueue uses a deferrable timer, the do_cache_clean() invocation will be delayed and combined with the closest "real" wake-up. This improves the power consumption situation. Note, I tried to create a DECLARE_DELAYED_WORK_DEFERRABLE() helper macro, similar to DECLARE_DELAYED_WORK(), but failed because of the way the timer wheel core stores the deferrable flag (it is the LSBit in the time->base pointer). My attempt to define a static variable with this bit set ended up with the "initializer element is not constant" error. Thus, I have to use run-time initialization, so I created a new cache_initialize() function which is called once when sunrpc is being initialized. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2010-05-14SUNRPC: Don't spam gssd with upcall requests when the kerberos key expiredTrond Myklebust
Now that the rpc.gssd daemon can explicitly tell us that the key expired, we should cache that information to avoid spamming gssd. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-05-14SUNRPC: Reorder the struct rpc_task fieldsTrond Myklebust
This improves the packing of the rpc_task, and ensures that on 64-bit platforms the size reduces to 216 bytes. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-05-14SUNRPC: Remove the 'tk_magic' debugging fieldTrond Myklebust
It has not triggered in almost a decade. Time to get rid of it... Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-05-14SUNRPC: Move the task->tk_bytes_sent and tk_rtt to struct rpc_rqstTrond Myklebust
It seems strange to maintain stats for bytes_sent in one structure, and bytes received in another. Try to assemble all the RPC request-related stats in struct rpc_rqst Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-05-14NFS: Don't use GFP_KERNEL in rpcsec_gss downcallsTrond Myklebust
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>
2010-05-14SUNRPC: Replace jiffies-based metrics with ktime-based metricsChuck Lever
Currently RPC performance metrics that tabulate elapsed time use jiffies time values. This is problematic on systems that use slow jiffies (for instance 100HZ systems built for paravirtualized environments). It is also a problem for computing precise latency statistics for advanced network transports, such as InfiniBand, that can have round-trip latencies significanly faster than a single clock tick. For the RPC client, adopt the high resolution time stamp mechanism already used by the network layer and blktrace: ktime. We use ktime format time stamps for all internal computations, and convert to milliseconds for presentation. As a result, we need only addition operations in the performance critical paths; multiply/divide is required only for presentation. We could report RTT metrics in microseconds. In fact the mountstats format is versioned to accomodate exactly this kind of interface improvement. For now, however, we'll stay with millisecond precision for presentation to maintain backwards compatibility with the handful of currently deployed user space tools. At a later point, we'll move to an API such as BDI_STATS where a finer timestamp precision can be reported. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-05-14SUNRPC: RPC metrics and RTT estimator should use same RTT valueChuck Lever
Compute an RPC request's RTT once, and use that value both for reporting RPC metrics, and for adjusting the RTT context used by the RPC client's RTT estimator algorithm. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-05-14SUNRPC: Trivial cleanups in include/linux/sunrpc/xdr.hChuck Lever
Clean up: Update the documenting comment, and fix some minor white space issues. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-05-14SUNRPC: Fail over more quickly on connect errorsTrond Myklebust
We should not allow soft tasks to wait for longer than the major timeout period when waiting for a reconnect to occur. Remove the field xprt->connect_timeout since it has been obsoleted by xprt->reestablish_timeout. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-05-14gss_krb5: Add support for rc4-hmac encryptionKevin Coffman
Add necessary changes to add kernel support for the rc4-hmac Kerberos encryption type used by Microsoft and described in rfc4757. Signed-off-by: Kevin Coffman <kwc@citi.umich.edu> Signed-off-by: Steve Dickson <steved@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-05-14gss_krb5: Use confounder length in wrap codeKevin Coffman
All encryption types use a confounder at the beginning of the wrap token. In all encryption types except arcfour-hmac, the confounder is the same as the blocksize. arcfour-hmac has a blocksize of one, but uses an eight byte confounder. Add an entry to the crypto framework definitions for the confounder length and change the wrap/unwrap code to use the confounder length rather than assuming it is always the blocksize. Signed-off-by: Kevin Coffman <kwc@citi.umich.edu> Signed-off-by: Steve Dickson <steved@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-05-14gssd_krb5: More arcfour-hmac supportKevin Coffman
For the arcfour-hmac support, the make_seq_num and get_seq_num functions need access to the kerberos context structure. This will be used in a later patch. Signed-off-by: Kevin Coffman <kwc@citi.umich.edu> Signed-off-by: Steve Dickson <steved@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-05-14gss_krb5: Save the raw session key in the contextKevin Coffman
This is needed for deriving arcfour-hmac keys "on the fly" using the sequence number or checksu Signed-off-by: Kevin Coffman <kwc@citi.umich.edu> Signed-off-by: Steve Dickson <steved@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-05-14gssd_krb5: arcfour-hmac supportKevin Coffman
For arcfour-hmac support, the make_checksum function needs a usage field to correctly calculate the checksum differently for MIC and WRAP tokens. Signed-off-by: Kevin Coffman <kwc@citi.umich.edu> Signed-off-by: Steve Dickson <steved@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-05-14gss_krb5: add remaining pieces to enable AES encryption supportKevin Coffman
Add the remaining pieces to enable support for Kerberos AES encryption types. Signed-off-by: Kevin Coffman <kwc@citi.umich.edu> Signed-off-by: Steve Dickson <steved@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-05-14gss_krb5: add support for new token formats in rfc4121Kevin Coffman
This is a step toward support for AES encryption types which are required to use the new token formats defined in rfc4121. Signed-off-by: Kevin Coffman <kwc@citi.umich.edu> [SteveD: Fixed a typo in gss_verify_mic_v2()] Signed-off-by: Steve Dickson <steved@redhat.com> [Trond: Got rid of the TEST_ROTATE/TEST_EXTRA_COUNT crap] Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-05-14gss_krb5: add support for triple-des encryptionKevin Coffman
Add the final pieces to support the triple-des encryption type. Signed-off-by: Kevin Coffman <kwc@citi.umich.edu> Signed-off-by: Steve Dickson <steved@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-05-14gss_krb5: Add upcall info indicating supported kerberos enctypesTrond Myklebust
The text based upcall now indicates which Kerberos encryption types are supported by the kernel rpcsecgss code. This is used by gssd to determine which encryption types it should attempt to negotiate when creating a context with a server. The server principal's database and keytab encryption types are what limits what it should negotiate. Therefore, its keytab should be created with only the enctypes listed by this file. Currently we support des-cbc-crc, des-cbc-md4 and des-cbc-md5 Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-05-14gss_krb5: handle new context format from gssdKevin Coffman
For encryption types other than DES, gssd sends down context information in a new format. This new format includes the information needed to support the new Kerberos GSS-API tokens defined in rfc4121. Signed-off-by: Kevin Coffman <kwc@citi.umich.edu> Signed-off-by: Steve Dickson <steved@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-05-14gss_krb5: import functionality to derive keys into the kernelKevin Coffman
Import the code to derive Kerberos keys from a base key into the kernel. This will allow us to change the format of the context information sent down from gssd to include only a single key. Signed-off-by: Kevin Coffman <kwc@citi.umich.edu> Signed-off-by: Steve Dickson <steved@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-05-14gss_krb5: add ability to have a keyed checksum (hmac)Kevin Coffman
Encryption types besides DES may use a keyed checksum (hmac). Modify the make_checksum() function to allow for a key and take care of enctype-specific processing such as truncating the resulting hash. Signed-off-by: Kevin Coffman <kwc@citi.umich.edu> Signed-off-by: Steve Dickson <steved@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-05-14gss_krb5: introduce encryption type frameworkKevin Coffman
Add enctype framework and change functions to use the generic values from it rather than the values hard-coded for des. Signed-off-by: Kevin Coffman <kwc@citi.umich.edu> Signed-off-by: Steve Dickson <steved@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-05-14gss_krb5: split up functions in preparation of adding new enctypesKevin Coffman
Add encryption type to the krb5 context structure and use it to switch to the correct functions depending on the encryption type. Signed-off-by: Kevin Coffman <kwc@citi.umich.edu> Signed-off-by: Steve Dickson <steved@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-05-14gss_krb5: Introduce encryption type frameworkKevin Coffman
Make the client and server code consistent regarding the extra buffer space made available for the auth code when wrapping data. Add some comments/documentation about the available buffer space in the xdr_buf head and tail when gss_wrap is called. Add a compile-time check to make sure we are not exceeding the available buffer space. Add a central function to shift head data. Signed-off-by: Kevin Coffman <kwc@citi.umich.edu> Signed-off-by: Steve Dickson <steved@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-03-22SUNRPC: Fix a use after free bug with the NFSv4.1 backchannelTrond Myklebust
The ->release_request() callback was designed to allow the transport layer to do housekeeping after the RPC call is done. It cannot be used to free the request itself, and doing so leads to a use-after-free bug in xprt_release(). Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-02-10nfs41 do not allocate unused back channel pagesAndy Adamson
Signed-off-by: Andy Adamson <andros@netapp.com> [Trond.Myklebust@netapp.com: moved definition of svc_is_backchannel() into include/linux/sunrpc/bc_xprt.h.] Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-12-16Merge branch 'bugfixes' of git://git.linux-nfs.org/projects/trondmy/nfs-2.6Linus Torvalds
* 'bugfixes' of git://git.linux-nfs.org/projects/trondmy/nfs-2.6: NFSv4: Fix a regression in the NFSv4 state manager NFSv4: Release the sequence id before restarting a CLOSE rpc call nfs41: fix session fore channel negotiation nfs41: do not zero seqid portion of stateid on close nfs: run state manager in privileged mode nfs: make recovery state manager operations privileged nfs: enforce FIFO ordering of operations trying to acquire slot rpc: add a new priority in RPC task nfs: remove rpc_task argument from nfs4_find_slot rpc: add rpc_queue_empty function nfs: change nfs4_do_setlk params to identify recovery type nfs: do not do a LOOKUP after open nfs: minor cleanup of session draining
2009-12-16Merge branch 'for-2.6.33' of git://linux-nfs.org/~bfields/linuxLinus Torvalds
* 'for-2.6.33' of git://linux-nfs.org/~bfields/linux: (42 commits) nfsd: remove pointless paths in file headers nfsd: move most of nfsfh.h to fs/nfsd nfsd: remove unused field rq_reffh nfsd: enable V4ROOT exports nfsd: make V4ROOT exports read-only nfsd: restrict filehandles accepted in V4ROOT case nfsd: allow exports of symlinks nfsd: filter readdir results in V4ROOT case nfsd: filter lookup results in V4ROOT case nfsd4: don't continue "under" mounts in V4ROOT case nfsd: introduce export flag for v4 pseudoroot nfsd: let "insecure" flag vary by pseudoflavor nfsd: new interface to advertise export features nfsd: Move private headers to source directory vfs: nfsctl.c un-used nfsd #includes lockd: Remove un-used nfsd headers #includes s390: remove un-used nfsd #includes sparc: remove un-used nfsd #includes parsic: remove un-used nfsd #includes compat.c: Remove dependence on nfsd private headers ...
2009-12-15nfsd: remove unused field rq_reffhJ. Bruce Fields
This field is never referenced anywhere else. I don't know what it was intended for. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2009-12-15rpc: add a new priority in RPC taskAlexandros Batsakis
Signed-off-by: Alexandros Batsakis <batsakis@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-12-15rpc: add rpc_queue_empty functionAlexandros Batsakis
Signed-off-by: Alexandros Batsakis <batsakis@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-12-14sunrpc: Clean never used include filesBoaz Harrosh
Remove include of two headers never used by this file. Doing so exposed a missing #include <linux/types.h> in include/linux/sunrpc/rpc_rdma.h. I did not see any other users dependency but if exist they should be fixed since these headers are totally irrelevant to here. Signed-off-by: Boaz Harrosh <bharrosh@panasas.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2009-12-03SUNRPC: Allow RPCs to fail quickly if the server is unreachableChuck Lever
The kernel sometimes makes RPC calls to services that aren't running. Because the kernel's RPC client always assumes the hard retry semantic when reconnecting a connection-oriented RPC transport, the underlying reconnect logic takes a long while to time out, even though the remote may have responded immediately with ECONNREFUSED. In certain cases, like upcalls to our local rpcbind daemon, or for NFS mount requests, we'd like the kernel to fail immediately if the remote service isn't reachable. This allows another transport to be tried immediately, or the pending request can be abandoned quickly. Introduce a per-request flag which controls how call_transmit_status() behaves when request transmission fails because the server cannot be reached. We don't want soft connection semantics to apply to other errors. The default case of the switch statement in call_transmit_status() no longer falls through; the fall through code is copied to the default case, and a "break;" is added. The transport's connection re-establishment timeout is also ignored for such requests. We want the request to fail immediately, so the reconnect delay is skipped. Additionally, we don't want a connect failure here to further increase the reconnect timeout value, since this request will not be retried. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-11-23Revert "knfsd: avoid overloading the CPU scheduler with enormous load averages"J. Bruce Fields
This reverts commit 59a252ff8c0f2fa32c896f69d56ae33e641ce7ad. This helps in an entirely cached workload but not necessarily in workloads that require waiting on disk. Conflicts: include/linux/sunrpc/svc.h net/sunrpc/svc_xprt.c Reported-by: Simon Kirby <sim@hostway.ca> Tested-by: Jesper Krogh <jesper@krogh.cc> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2009-09-23sunrpc: xdr_xcode_hyper helpers cannot presume 64-bit alignmentBenny Halevy
Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-09-15SUNRPC: Defer the auth_gss upcall when the RPC call is asynchronousTrond Myklebust
Otherwise, the upcall is going to be synchronous, which may not be what the caller wants... Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2009-09-13nfsd41: sunrpc: add new xprt class for nfsv4.1 backchannelAlexandros Batsakis
[sunrpc: change idle timeout value for the backchannel] Signed-off-by: Alexandros Batsakis <batsakis@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Acked-by: Trond Myklebust <Trond.Myklebust@netapp.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2009-09-11nfsd41: sunrpc: Added rpc server-side backchannel handlingRahul Iyer
When the call direction is a reply, copy the xid and call direction into the req->rq_private_buf.head[0].iov_base otherwise rpc_verify_header returns rpc_garbage. Signed-off-by: Rahul Iyer <iyer@netapp.com> Signed-off-by: Mike Sager <sager@netapp.com> Signed-off-by: Marc Eshel <eshel@almaden.ibm.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Ricardo Labiaga <Ricardo.Labiaga@netapp.com> Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [get rid of CONFIG_NFSD_V4_1] [sunrpc: refactoring of svc_tcp_recvfrom] [nfsd41: sunrpc: create common send routine for the fore and the back channels] [nfsd41: sunrpc: Use free_page() to free server backchannel pages] [nfsd41: sunrpc: Document server backchannel locking] [nfsd41: sunrpc: remove bc_connect_worker()] [nfsd41: sunrpc: Define xprt_server_backchannel()[ [nfsd41: sunrpc: remove bc_close and bc_init_auto_disconnect dummy functions] [nfsd41: sunrpc: eliminate unneeded switch statement in xs_setup_tcp()] [nfsd41: sunrpc: Don't auto close the server backchannel connection] [nfsd41: sunrpc: Remove unused functions] Signed-off-by: Alexandros Batsakis <batsakis@netapp.com> Signed-off-by: Ricardo Labiaga <Ricardo.Labiaga@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfsd41: change bc_sock to bc_xprt] [nfsd41: sunrpc: move struct rpc_buffer def into a common header file] [nfsd41: sunrpc: use rpc_sleep in bc_send_request so not to block on mutex] [removed cosmetic changes] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [sunrpc: add new xprt class for nfsv4.1 backchannel] [sunrpc: v2.1 change handling of auto_close and init_auto_disconnect operations for the nfsv4.1 backchannel] Signed-off-by: Alexandros Batsakis <batsakis@netapp.com> [reverted more cosmetic leftovers] [got rid of xprt_server_backchannel] [separated "nfsd41: sunrpc: add new xprt class for nfsv4.1 backchannel"] Signed-off-by: Benny Halevy <bhalevy@panasas.com> Cc: Trond Myklebust <trond.myklebust@netapp.com> [sunrpc: change idle timeout value for the backchannel] Signed-off-by: Alexandros Batsakis <batsakis@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Acked-by: Trond Myklebust <trond.myklebust@netapp.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2009-08-21nfsd: populate sin6_scope_id on callback address with scopeid from rq_addr ↵Jeff Layton
on SETCLIENTID call When a SETCLIENTID call comes in, one of the args given is the svc_rqst. This struct contains an rq_addr field which holds the address that sent the call. If this is an IPv6 address, then we can use the sin6_scope_id field in this address to populate the sin6_scope_id field in the callback address. AFAICT, the rq_addr.sin6_scope_id is non-zero if and only if the client mounted the server's link-local address. Signed-off-by: Jeff Layton <jlayton@redhat.com> Acked-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
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