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* nfs: fix some issues in nfs41_proc_reclaim_complete()Dan Carpenter2010-04-281-1/+4
| | | | | | | | The original code passed an ERR_PTR() to rpc_put_task() and instead of returning zero on success it returned -ENOMEM. Signed-off-by: Dan Carpenter <error27@gmail.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFSv4: fix delegated lockingTrond Myklebust2010-04-121-1/+3
| | | | | | | | | | | | | | | | | | | Arnaud Giersch reports that NFSv4 locking is broken when we hold a delegation since commit 8e469ebd6dc32cbaf620e134d79f740bf0ebab79 (NFSv4: Don't allow posix locking against servers that don't support it). According to Arnaud, the lock succeeds the first time he opens the file (since we cannot do a delegated open) but then fails after we start using delegated opens. The following patch fixes it by ensuring that locking behaviour is governed by a per-filesystem capability flag that is initially set, but gets cleared if the server ever returns an OPEN without the NFS4_OPEN_RESULT_LOCKTYPE_POSIX flag being set. Reported-by: Arnaud Giersch <arnaud.giersch@iut-bm.univ-fcomte.fr> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> Cc: stable@kernel.org
* Have nfs ->d_revalidate() report errors properlyAl Viro2010-04-071-2/+1
| | | | | | | | | | | | | | | | | If nfs atomic open implementation ends up doing open request from ->d_revalidate() codepath and gets an error from server, return that error to caller explicitly and don't bother with lookup_instantiate_filp() at all. ->d_revalidate() can return an error itself just fine... See http://bugzilla.kernel.org/show_bug.cgi?id=15674 http://marc.info/?l=linux-kernel&m=126988782722711&w=2 for original report. Reported-by: Daniel J Blueman <daniel.blueman@gmail.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* include cleanup: Update gfp.h and slab.h includes to prepare for breaking ↵Tejun Heo2010-03-301-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | implicit slab.h inclusion from percpu.h percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo <tj@kernel.org> Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
* nfs: fix unlikely memory leakDan Carpenter2010-03-081-0/+1
| | | | | | | | | I'll admit that it's unlikely for the first allocation to fail and the second one to succeed. I won't be offended if you ignore this patch. Signed-off-by: Dan Carpenter <error27@gmail.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* Merge branch 'writeback-for-2.6.34' into nfs-for-2.6.34Trond Myklebust2010-03-051-4/+4
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| * a couple of mntget+dget -> path_get in nfs4procAl Viro2010-03-031-4/+4
| | | | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | nfs41 fix NFS4ERR_CLID_INUSE for exchange idAndy Adamson2010-03-021-1/+1
| | | | | | | | | | | | Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* | nfs4: renewd renew operations should take/put a client referenceAlexandros Batsakis2010-03-021-1/+5
| | | | | | | | | | | | | | | | | | renewd sends RENEW requests to the NFS server in order to renew state. As the request is asynchronous, renewd should take a reference to the nfs_client to prevent concurrent umounts from freeing the client Signed-off-by: Alexandros Batsakis <batsakis@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* | nfs41: renewd sequence operations should take/put client referenceAlexandros Batsakis2010-03-021-6/+12
| | | | | | | | | | | | | | | | | | renewd sends SEQUENCE requests to the NFS server in order to renew state. As the request is asynchronous, renewd should take a reference to the nfs_client to prevent concurrent umounts from freeing the session/client Signed-off-by: Alexandros Batsakis <batsakis@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* | nfs: prevent backlogging of renewd requestsAlexandros Batsakis2010-03-021-4/+20
| | | | | | | | | | | | | | | | | | | | | | | | | | | | If the renewd send queue gets backlogged (e.g., if the server goes down), we will keep filling the queue with periodic RENEW/SEQUENCE requests. This patch schedules a new renewd request if and only if the previous one returns (either success or failure) Signed-off-by: Alexandros Batsakis <batsakis@netapp.com> [Trond.Myklebust@netapp.com: moved nfs4_schedule_state_renewal() into separate nfs4_renew_release() and nfs41_sequence_release() callbacks to ensure correct behaviour on call setup failure] Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* | nfs41: resize slot table in resetAndy Adamson2010-02-101-19/+21
| | | | | | | | | | | | | | When session is reset, client can renegotiate slot table size. Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* | nfs41: Adjust max cache response size valueMike Sager2010-02-101-4/+2
| | | | | | | | | | | | | | | | | | For the CREATE_SESSION attribute ca_maxresponsesize_cached, calculate the value based on the rpc reply header size plus the maximum nfs compound reply size. Signed-off-by: Mike Sager <sager@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* | nfs4: handle -EKEYEXPIRED errors from RPC layerJeff Layton2010-02-101-2/+9
|/ | | | | | | | | | | | | | | | | | If a KRB5 TGT ticket expires, we don't want to return an error immediatel. If someone has a long running job and just forgets to run "kinit" in time then this will make it fail. Instead, we want to treat this situation as we would NFS4ERR_DELAY and retry the upcall after delaying a bit with an exponential backoff. This patch just makes any place that would handle NFS4ERR_DELAY also handle -EKEYEXPIRED the same way. In the future, we may want to be more sophisticated however and handle hard vs. soft mounts differently, or specify some upper limit on how long we'll wait for a new TGT to be acquired. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: Ensure that we handle NFS4ERR_STALE_STATEID correctlyTrond Myklebust2010-01-261-13/+31
| | | | | | | | Even if the server is crazy, we should be able to mark the stateid as being bad, to ensure it gets recovered. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> Reviewed-by: Chuck Lever <chuck.lever@oracle.com>
* NFSv4.1: Don't call nfs4_schedule_state_recovery() unnecessarilyTrond Myklebust2010-01-261-6/+2
| | | | | | | | | Currently, nfs4_handle_exception() will call it twice if called with an error of -NFS4ERR_STALE_CLIENTID, -NFS4ERR_STALE_STATEID or -NFS4ERR_EXPIRED. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> Reviewed-by: Chuck Lever <chuck.lever@oracle.com>
* NFSv4: Don't allow posix locking against servers that don't support itTrond Myklebust2010-01-261-1/+6
| | | | | | Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> Cc: stable@kernel.org Reviewed-by: Chuck Lever <chuck.lever@oracle.com>
* NFSv4: Ensure that the NFSv4 locking can recover from stateid errorsTrond Myklebust2010-01-261-0/+19
| | | | | | | | | In most cases, we just want to mark the lock_stateid sequence id as being uninitialised. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> Cc: stable@kernel.org Reviewed-by: Chuck Lever <chuck.lever@oracle.com>
* NFSv4: Release the sequence id before restarting a CLOSE rpc callTrond Myklebust2009-12-151-4/+3
| | | | | | | | | | | If the CLOSE or OPEN_DOWNGRADE call triggers a state recovery, and has to be resent, then we must release the seqid. Otherwise the open recovery will wait for the close to finish, which causes a deadlock. This is mainly a NFSv4.1 problem, although it can theoretically happen with NFSv4.0 too, in a OPEN_DOWNGRADE situation. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* nfs41: fix session fore channel negotiationAndy Adamson2009-12-151-2/+10
| | | | | | | | | | | | If the rsize or wsize is not set on the mount command, negotiate the highest supported rsize and wsize in session creation. Fixes a bug where the client negotiated nfs41_maxwrite_overhead as ca_maxrequestsize and nfs41_maxread_overhead as ca_maxresponsesize resulting in NFS4ERR_REQ_TOO_BIG errors on writes. Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* nfs41: do not zero seqid portion of stateid on closeAndy Adamson2009-12-151-2/+0
| | | | | | | | Remove code left over from a previous minorversion draft. which specified zeroing seqid portions of stateid's. Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* nfs: run state manager in privileged modeAlexandros Batsakis2009-12-151-1/+2
| | | | | Signed-off-by: Alexandros Batsakis <batsakis@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* nfs: make recovery state manager operations privilegedAlexandros Batsakis2009-12-151-18/+97
| | | | | Signed-off-by: Alexandros Batsakis <batsakis@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* nfs: enforce FIFO ordering of operations trying to acquire slotAlexandros Batsakis2009-12-151-4/+18
| | | | | Signed-off-by: Alexandros Batsakis <batsakis@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* nfs: remove rpc_task argument from nfs4_find_slotAlexandros Batsakis2009-12-151-2/+2
| | | | | Signed-off-by: Alexandros Batsakis <batsakis@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* nfs: change nfs4_do_setlk params to identify recovery typeAlexandros Batsakis2009-12-151-7/+7
| | | | | Signed-off-by: Alexandros Batsakis <batsakis@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* nfs: do not do a LOOKUP after openAlexandros Batsakis2009-12-151-3/+0
| | | | | Signed-off-by: Alexandros Batsakis <batsakis@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* nfs: minor cleanup of session drainingAlexandros Batsakis2009-12-151-9/+18
| | | | | Signed-off-by: Alexandros Batsakis <batsakis@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFSv41: Fix a potential state leakage when restarting nfs4_close_prepareTrond Myklebust2009-12-081-17/+35
| | | | | | | | | | | | | Currently, if the call to nfs4_setup_sequence() in nfs4_close_prepare fails, any later retries will fail to launch an RPC call, due to the fact that the &state->flags will have been cleared. Ditto if nfs4_close_done() triggers a call to the NFSv4.1 version of nfs_restart_rpc(). We therefore move the actual clearing of the state->flags to nfs4_close_done(), when we know that the RPC call was successful. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* nfs41: Handle NFSv4.1 session errors in the delegation recall codeRicardo Labiaga2009-12-071-0/+5
| | | | | Signed-off-by: Ricardo Labiaga <Ricardo.Labiaga@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* nfs41: Retry delegation return if it failed with session errorRicardo Labiaga2009-12-071-2/+13
| | | | | | | | Update nfs4_delegreturn_done() to retry the operation after setting the NFS4CLNT_SESSION_SETUP bit to indicate the need to reset the session. Signed-off-by: Ricardo Labiaga <Ricardo.Labiaga@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* nfs41: Handle session errors during delegation returnRicardo Labiaga2009-12-071-0/+8
| | | | | | | Add session error handling to nfs4_open_delegation_recall() Signed-off-by: Ricardo Labiaga <Ricardo.Labiaga@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: Fix up the declaration of nfs4_restart_rpc when NFSv4 not configuredTrond Myklebust2009-12-071-18/+7
| | | | | | | | Also rename it: it is used in generic code, and so should not have a 'nfs4' prefix. Reported-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* nfs41: Don't clear DRAINING flag on NFS4ERR_STALE_CLIENTIDRicardo Labiaga2009-12-061-0/+2
| | | | | | | | | | | | | | | If CREATE_SESSION fails with NFS4ERR_STALE_CLIENTID, don't clear the NFS4CLNT_SESSION_DRAINING flag and don't wake RPCs waiting for the session to be reestablished. We don't have a session yet, so there is no reason to wake other RPCs. This avoids sending spurious compounds with bogus sequenceID during session and state recovery. Signed-off-by: Ricardo Labiaga <Ricardo.Labiaga@netapp.com> [Trond.Myklebust@netapp.com: cleaned up patch by adding the nfs41_begin/end_drain_session() helpers] Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* nfs41: nfs41_setup_state_renewalRicardo Labiaga2009-12-061-13/+0
| | | | | | | | | | Move call to get the lease time and the setup of the state renewal out of nfs4_create_session so that it can be called after clearing the DRAINING flag. We use the getattr RPC to obtain the lease time, which requires a sequence slot. Signed-off-by: Ricardo Labiaga <Ricardo.Labiaga@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFSv41: More cleanupsTrond Myklebust2009-12-051-4/+3
| | | | Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFSv41: Fix up some bugs in the NFS4CLNT_SESSION_DRAINING codeTrond Myklebust2009-12-051-9/+8
| | | | Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFSv41: Clean up slot table managementTrond Myklebust2009-12-051-50/+15
| | | | | | | | | We no longer need to maintain a distinction between nfs41_sequence_done and nfs41_sequence_free_slot. This fixes a number of slot table leakages in the NFSv4.1 code. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFSv41: Fix nfs4_proc_create_sessionTrond Myklebust2009-12-051-36/+24
| | | | | | | | | | | | We should not assume that nfs41_init_clientid() will always want to initialise the session. If it is being called due to a server reboot, then we just want to reset the session after re-establishing the clientid. Fix this by getting rid of the 'reset' parameter in nfs4_proc_create_session(), and instead relying on whether or not the session slot table pointer is non-NULL. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* nfs41: RECLAIM_COMPLETE functionalityRicardo Labiaga2009-12-051-0/+105
| | | | | | | | | | | | | | | | Implements RECLAIM_COMPLETE as an asynchronous RPC. NFS4ERR_DELAY is retried, NFS4ERR_DEADSESSION invokes the error handling but does not result in a retry, since we don't want to have a lingering RECLAIM_COMPLETE call sent in the middle of a possible new state recovery cycle. If a session reset occurs, a new wave of reclaim operations will follow, containing their own RECLAIM_COMPLETE call. We don't want a retry to get on the way of recovery by incorrectly indicating to the server that we're done reclaiming state. A subsequent patch invokes the functionality. Signed-off-by: Ricardo Labiaga <Ricardo.Labiaga@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* nfs41: check SEQUENCE status flagAlexandros Batsakis2009-12-051-0/+2
| | | | | | | | | | the server can indicate a number of error conditions by setting the appropriate bits in the SEQUENCE operation. The client re-establishes state with the server when it receives one of those, with the action depending on the specific case. Signed-off-by: Alexandros Batsakis <batsakis@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* nfs41: V2 adjust max_rqst_sz, max_resp_sz w.r.t to rsize, wsizeAlexandros Batsakis2009-12-051-2/+5
| | | | | | | | | The v4.1 client should take into account the desired rsize, wsize when negotiating the max size in CREATE_SESSION. Accordingly, it should use rsize, wsize that are smaller than the session negotiated values. Signed-off-by: Alexandros Batsakis <batsakis@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* nfs41: remove server-only EXCHGID4_FLAG_CONFIRMED_R flag from exchange_idAlexandros Batsakis2009-12-051-0/+3
| | | | | Signed-off-by: Alexandros Batsakis <batsakis@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* nfs41: add support for the exclusive create flagsAlexandros Batsakis2009-12-051-3/+9
| | | | | | | | | | In v4.1 the client MUST/SHOULD use the EXCLUSIVE4_1 flag instead of EXCLUSIVE4, and GUARDED when the server supports persistent sessions. For now (and until we support suppattr_exclcreat), we don't send any attributes with EXCLUSIVE4_1 relying in the subsequent SETATTR as in v4.0 Signed-off-by: Alexandros Batsakis <batsakis@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* nfs41: only state manager sets NFS4CLNT_SESSION_SETUPAndy Adamson2009-12-041-3/+3
| | | | | | | | Replace sync and async handlers setting of the NFS4CLNT_SESSION_SETUP bit with setting NFS4CLNT_CHECK_LEASE, and let the state manager decide to reset the session. Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* nfs41: drain session cleanupAndy Adamson2009-12-041-9/+9
| | | | | | | | | | | | Do not wake up the next slot_tbl_waitq task in nfs4_free_slot because we may be draining the slot. Either signal the state manager that the session is drained (the state manager wakes up tasks) OR wake up the next task. In nfs41_sequence_done, the slot dereference is only needed in the sequence operation success case. Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* nfs41: nfs41: fix state manager deadlock in session resetAndy Adamson2009-12-041-9/+17
| | | | | | | | | | | | | | | | If the session is reset during state recovery, the state manager thread can sleep on the slot_tbl_waitq causing a deadlock. Add a completion framework to the session. Have the state manager thread set a new session state (NFS4CLNT_SESSION_DRAINING) and wait for the session slot table to drain. Signal the state manager thread in nfs41_sequence_free_slot when the NFS4CLNT_SESSION_DRAINING bit is set and the session is drained. Reported-by: Trond Myklebust <trond@netapp.com> Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* nfs41: remove nfs4_recover_sessionAndy Adamson2009-12-041-23/+3
| | | | | | | | nfs4_recover_session can put rpciod to sleep. Just use nfs4_schedule_recovery. Reported-by: Trond Myklebust <trond.myklebust@netapp.com> Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* nfs41: don't clear tk_action on successAndy Adamson2009-12-041-1/+1
| | | | | Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* nfs41: fix switch in nfs4_handle_exceptionAndy Adamson2009-12-041-1/+1
| | | | | | | Do not fall through and call nfs4_delay on session error handling. Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
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