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* NFSv4: Ensure that clientid and session establishment can time outTrond Myklebust2011-04-24
| | | | | | | | | The following patch ensures that we do not get permanently trapped in the RPC layer when trying to establish a new client id or session. This again ensures that the state manager can finish in a timely fashion when the last filesystem to reference the nfs_client exits. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFSv4.1: Don't loop forever in nfs4_proc_create_sessionTrond Myklebust2011-04-24
| | | | | | | | | | | If a server for some reason keeps sending NFS4ERR_DELAY errors, we can end up looping forever inside nfs4_proc_create_session, and so the usual mechanisms for detecting if the nfs_client is dead don't work. Fix this by ensuring that we loop inside the nfs4_state_manager thread instead. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFSv4.1: Ensure state manager thread dies on last umountTrond Myklebust2011-04-15
| | | | | | | | Currently, the state manager may continue to try recovering state forever even after the last filesystem to reference that nfs_client has umounted. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> Cc: stable@kernel.org
* fs: don't use igrab() while holding i_lockDave Chinner2011-03-29
| | | | | | | | | | | | | | | Fix the incorrect use of igrab() inside the i_lock in NFS and Ceph‥ If we are already holding the i_lock, we have a reference to the inode so we can safely use ihold() to gain an extra reference. This avoids hangs due to lock recursion on the i_lock now that the inode_lock is gone and igrab() uses the i_lock itself. Signed-off-by: Dave Chinner <dchinner@redhat.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: linux-fsdevel@vger.kernel.org Cc: Ryan Mallon <ryan@bluewatersys.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* NFSv4.1: filelayout async error handlerAndy Adamson2011-03-11
| | | | | | | | | | | Use our own async error handler. Mark the layout as failed and retry i/o through the MDS on specified errors. Update the mds_offset in nfs_readpage_retry so that a failed short-read retry to a DS gets correctly resent through the MDS. Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFSv4.1: new flag for lease time checkAndy Adamson2011-03-11
| | | | | | | | | Data servers cannot send nfs4_proc_get_lease_time. but still need to setup state renewal. Add the NFS_CS_CHECK_LEASE_TIME bit to indicate if the lease time can be checked. Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFSv4: nfs4_state_mark_reclaim_nograce() should be staticTrond Myklebust2011-03-11
| | | | | | | There are no more external users of nfs4_state_mark_reclaim_nograce() or nfs4_state_mark_reclaim_reboot(), so mark them as static. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFSv4/4.1: Fix nfs4_schedule_state_recovery abusesTrond Myklebust2011-03-11
| | | | | | | | | | | | nfs4_schedule_state_recovery() should only be used when we need to force the state manager to check the lease. If we just want to start the state manager in order to handle a state recovery situation, we should be using nfs4_schedule_state_manager(). This patch fixes the abuses of nfs4_schedule_state_recovery() by replacing its use with a set of helper functions that do the right thing. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS do not find client in NFSv4 pg_authenticateAndy Adamson2011-01-25
| | | | | | | | | | The information required to find the nfs_client cooresponding to the incoming back channel request is contained in the NFS layer. Perform minimal checking in the RPC layer pg_authenticate method, and push more detailed checking into the NFS layer where the nfs_client can be found. Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: Move cl_state_owners and related fields to the nfs_server structChuck Lever2011-01-06
| | | | | | | | | | | | | | NFSv4 migration needs to reassociate state owners from the source to the destination nfs_server data structures. To make that easier, move the cl_state_owners field to the nfs_server struct. cl_openowner_id and cl_lockowner_id accompany this move, as they are used in conjunction with cl_state_owners. The cl_lock field in the parent nfs_client continues to protect all three of these fields. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* pnfs: layout roc codeFred Isaman2011-01-06
| | | | | | | | | | | | | A layout can request return-on-close. How this interacts with the forgetful model of never sending LAYOUTRETURNS is a bit ambiguous. We forget any layouts marked roc, and wait for them to be completely forgotten before continuing with the close. In addition, to compensate for races with any inflight LAYOUTGETs, and the fact that we do not get any layout stateid back from the server, we set the barrier to the worst case scenario of current_seqid + number of outstanding LAYOUTGETS. Signed-off-by: Fred Isaman <iisaman@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS add session back channel drainingAndy Adamson2011-01-06
| | | | | | | | | | | | | | | | | Currently session draining only drains the fore channel. The back channel processing must also be drained. Use the back channel highest_slot_used to indicate that a callback is being processed by the callback thread. Move the session complete to be per channel. When the session is draininig, wait for any current back channel processing to complete and stop all new back channel processing by returning NFS4ERR_DELAY to the back channel client. Drain the back channel, then the fore channel. Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS associate sessionid with callback connectionAndy Adamson2011-01-06
| | | | | | | | | | | The sessions based callback service is started prior to the CREATE_SESSION call so that it can handle CB_NULL requests which can be sent before the CREATE_SESSION call returns and the session ID is known. Set the callback sessionid after a sucessful CREATE_SESSION. Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* Merge branch 'nfs-for-2.6.37' of ↵Linus Torvalds2010-10-26
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.linux-nfs.org/projects/trondmy/nfs-2.6 * 'nfs-for-2.6.37' of git://git.linux-nfs.org/projects/trondmy/nfs-2.6: net/sunrpc: Use static const char arrays nfs4: fix channel attribute sanity-checks NFSv4.1: Use more sensible names for 'initialize_mountpoint' NFSv4.1: pnfs: filelayout: add driver's LAYOUTGET and GETDEVICEINFO infrastructure NFSv4.1: pnfs: add LAYOUTGET and GETDEVICEINFO infrastructure NFS: client needs to maintain list of inodes with active layouts NFS: create and destroy inode's layout cache NFSv4.1: pnfs: filelayout: introduce minimal file layout driver NFSv4.1: pnfs: full mount/umount infrastructure NFS: set layout driver NFS: ask for layouttypes during v4 fsinfo call NFS: change stateid to be a union NFSv4.1: pnfsd, pnfs: protocol level pnfs constants SUNRPC: define xdr_decode_opaque_fixed NFSD: remove duplicate NFS4_STATEID_SIZE
| * NFS: client needs to maintain list of inodes with active layoutsAndy Adamson2010-10-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In particular, server reboot will invalidate all layouts. Note that in order to have an active layout, we must get a successful response from the server. To avoid adding that machinery, this patch just includes a stub that fakes up a successful return. Since the layout is never referenced for io, this is not a problem. Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Dean Hildebrand <dhildebz@umich.edu> Signed-off-by: Fred Isaman <iisaman@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* | Merge branch 'nfs-for-2.6.37' of ↵Linus Torvalds2010-10-25
|\| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.linux-nfs.org/projects/trondmy/nfs-2.6 * 'nfs-for-2.6.37' of git://git.linux-nfs.org/projects/trondmy/nfs-2.6: (67 commits) SUNRPC: Cleanup duplicate assignment in rpcauth_refreshcred nfs: fix unchecked value Ask for time_delta during fsinfo probe Revalidate caches on lock SUNRPC: After calling xprt_release(), we must restart from call_reserve NFSv4: Fix up the 'dircount' hint in encode_readdir NFSv4: Clean up nfs4_decode_dirent NFSv4: nfs4_decode_dirent must clear entry->fattr->valid NFSv4: Fix a regression in decode_getfattr NFSv4: Fix up decode_attr_filehandle() to handle the case of empty fh pointer NFS: Ensure we check all allocation return values in new readdir code NFS: Readdir plus in v4 NFS: introduce generic decode_getattr function NFS: check xdr_decode for errors NFS: nfs_readdir_filler catch all errors NFS: readdir with vmapped pages NFS: remove page size checking code NFS: decode_dirent should use an xdr_stream SUNRPC: Add a helper function xdr_inline_peek NFS: remove readdir plus limit ...
| * nfs: include ratelimit.h, fix nfs4state build errorRandy Dunlap2010-10-23
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | nfs4state.c uses interfaces from ratelimit.h. It needs to include that header file to fix build errors: fs/nfs/nfs4state.c:1195: warning: type defaults to 'int' in declaration of 'DEFINE_RATELIMIT_STATE' fs/nfs/nfs4state.c:1195: warning: parameter names (without types) in function declaration fs/nfs/nfs4state.c:1195: error: invalid storage class for function 'DEFINE_RATELIMIT_STATE' fs/nfs/nfs4state.c:1195: error: implicit declaration of function '__ratelimit' fs/nfs/nfs4state.c:1195: error: '_rs' undeclared (first use in this function) Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Cc: Trond Myklebust <Trond.Myklebust@netapp.com> Cc: linux-nfs@vger.kernel.org Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFSv4: The state manager must ignore EKEYEXPIRED.Trond Myklebust2010-10-23
| | | | | | | | | | | | Otherwise, we cannot recover state correctly. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFSv4: Don't call nfs4_reclaim_complete() on receiving NFS4ERR_STALE_CLIENTIDTrond Myklebust2010-10-19
| | | | | | | | | | | | | | | | | | | | | | | | If the server sends us an NFS4ERR_STALE_CLIENTID while the state management thread is busy reclaiming state, we do want to treat all state that wasn't reclaimed before the STALE_CLIENTID as if a network partition occurred (see the edge conditions described in RFC3530 and RFC5661). What we do not want to do is to send an nfs4_reclaim_complete(), since we haven't yet even started reclaiming state after the server rebooted. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> Cc: stable@kernel.org
* | fs/locks.c: prepare for BKL removalArnd Bergmann2010-10-05
|/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This prepares the removal of the big kernel lock from the file locking code. We still use the BKL as long as fs/lockd uses it and ceph might sleep, but we can flip the definition to a private spinlock as soon as that's done. All users outside of fs/lockd get converted to use lock_flocks() instead of lock_kernel() where appropriate. Based on an earlier patch to use a spinlock from Matthew Wilcox, who has attempted this a few times before, the earliest patch from over 10 years ago turned it into a semaphore, which ended up being slower than the BKL and was subsequently reverted. Someone should do some serious performance testing when this becomes a spinlock, since this has caused problems before. Using a spinlock should be at least as good as the BKL in theory, but who knows... Signed-off-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Matthew Wilcox <willy@linux.intel.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Trond Myklebust <trond.myklebust@fys.uio.no> Cc: "J. Bruce Fields" <bfields@fieldses.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Miklos Szeredi <mszeredi@suse.cz> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: John Kacur <jkacur@redhat.com> Cc: Sage Weil <sage@newdream.net> Cc: linux-kernel@vger.kernel.org Cc: linux-fsdevel@vger.kernel.org
* NFSv4: Ensure the lockowners are labelled using the fl_owner and/or fl_pidTrond Myklebust2010-07-30
| | | | | | | flock locks want to be labelled using the process pid, while posix locks want to be labelled using the fl_owner. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFSv4: Add support for the RELEASE_LOCKOWNER operationTrond Myklebust2010-07-30
| | | | | | | This is needed by NFSv4.0 servers in order to keep the number of locking stateids at a manageable level. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFSv4: Clean up struct nfs4_state_ownerTrond Myklebust2010-06-24
| | | | | | | | | The 'so_delegations' list appears to be unused. Also eliminate so_client. If we already have so_server, we can get to the nfs_client structure. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFSv41: Convert the various reboot recovery ops etc to minor version opsTrond Myklebust2010-06-22
| | | | Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFSv41: Don't store session state in the nfs_client->cl_stateTrond Myklebust2010-06-22
| | | | Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFSv4: Don't use GFP_KERNEL allocations in state recoveryTrond Myklebust2010-05-14
| | | | | | | | | | | | We do not want to have the state recovery thread kick off and wait for a memory reclaim, since that may deadlock when the writebacks end up waiting for the state recovery thread to complete. The safe thing is therefore to use GFP_NOFS in all open, close, delegation return, lock, etc. operations that may be called by the state recovery thread. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFSv4: Clean up the NFSv4 setclientid operationTrond Myklebust2010-05-14
| | | | | Reviewed-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFSv4.1: Various fixes to the sequence flag error handlingTrond Myklebust2010-03-02
| | | | | | | | | | | | | Ensure that we change the EXCHANGE_ID verifier (i.e. clp->cl_boot_time) when we want to reset all state. This is mainly needed when the server tells us that it is revoking our open or lock stateids. Handle revoking of recallable state by expiring the delegations. Handle callback path issues by expiring the delegations and then resetting the session. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* nfs41: clear NFS4CLNT_RECALL_SLOT bit on session resetAndy Adamson2010-02-10
| | | | | Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* nfs41: implement cb_recall_slotAndy Adamson2010-02-10
| | | | | | | Drain the fore channel and reset the max_slots to the new value. Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* nfs4: handle -EKEYEXPIRED errors from RPC layerJeff Layton2010-02-10
| | | | | | | | | | | | | | | | | | 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 Myklebust2010-01-26
| | | | | | | | 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: Fix a regression in the NFSv4 state managerTrond Myklebust2009-12-15
| | | | | | | | | | | | | | | | | Commit 5601a00d671fe89f9b087513244abcd08ad67e7d (nfs: run state manager in privileged mode) introduces a regression in the NFSv4 code when compiled with CONFIG_NFS_V4_1. The calls to nfs4_end_drain_session() from the main loop in nfs4_state_manager() Oops due to the lack of an NFSv4.1 session when running NFSv4.0. The fix is to move those two calls back into nfs41_init_clientid() and nfs4_reset_session(). The calls to nfs4_end_drain_session() that remain inside nfs4_state_manager() are safe, since the NFSv4.0 code will never set the NFS4CLNT_SESSION_DRAINING bit. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFSv4: Release the sequence id before restarting a CLOSE rpc callTrond Myklebust2009-12-15
| | | | | | | | | | | 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>
* nfs: run state manager in privileged modeAlexandros Batsakis2009-12-15
| | | | | 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 Batsakis2009-12-15
| | | | | Signed-off-by: Alexandros Batsakis <batsakis@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* nfs41: Invoke RECLAIM_COMPLETE on all new client idsRicardo Labiaga2009-12-08
| | | | | | | | | | | | | The NFSv4.1 spec indicates RECLAIM_COMPLETE is to be issued whenever a client establishes a new client id, not only after detecting the server has rebooted. Set the NFS4CLNT_RECLAIM_REBOOT bit after every new client id has been established. This enables us to issue RECLAIM_COMPLETE during the wrap up of the NFS4CLNT_RECLAIM_REBOOT state. Signed-off-by: Ricardo Labiaga <Ricardo.Labiaga@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* nfs41: Mark stateids in need of reclaim if state manager gets stale clientidRicardo Labiaga2009-12-07
| | | | | | | | The state manager was not marking the stateids as needing to be reclaimed after reestablishing the clientid. Signed-off-by: Ricardo Labiaga <Ricardo.Labiaga@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* nfs41: Don't clear DRAINING flag on NFS4ERR_STALE_CLIENTIDRicardo Labiaga2009-12-06
| | | | | | | | | | | | | | | 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 Labiaga2009-12-06
| | | | | | | | | | 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: Fix up some bugs in the NFS4CLNT_SESSION_DRAINING codeTrond Myklebust2009-12-05
| | | | Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFSv41: Fix nfs4_proc_create_sessionTrond Myklebust2009-12-05
| | | | | | | | | | | | 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: Invoke RECLAIM_COMPLETERicardo Labiaga2009-12-05
| | | | | | | | | | | | | | | This patch invokes RECLAIM_COMPLETE after the client is done reclaiming state. There are interpretations of the spec that suggest that RECLAIM_COMPLETE should also be issued after a new clientid has been obtained from the server and even if there is no state to reclaim. This tells the server that the client has no state to reclaim even if the client isn't aware the server may have rebooted. Signed-off-by: Ricardo Labiaga <Ricardo.Labiaga@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* nfs41: RECLAIM_COMPLETE functionalityRicardo Labiaga2009-12-05
| | | | | | | | | | | | | | | | 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>
* NFSv41: nfs4_reset_session must always set NFS4CLNT_SESSION_DRAININGTrond Myklebust2009-12-05
| | | | | | | Otherwise we have no guarantees that other processes won't start another RPC call while we're resetting the session. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* nfs41: check SEQUENCE status flagAlexandros Batsakis2009-12-05
| | | | | | | | | | 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: only state manager sets NFS4CLNT_SESSION_SETUPAndy Adamson2009-12-04
| | | | | | | | 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: nfs41: fix state manager deadlock in session resetAndy Adamson2009-12-04
| | | | | | | | | | | | | | | | 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: fix switch in nfs4_recovery_handle_errorAndy Adamson2009-12-04
| | | | | | | Do not fall through and set NFS4CLNT_SESSION_RESET bit on NFS4ERR_EXPIRED Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* nfs41: rename cl_state session SETUP bit to RESETAndy Adamson2009-12-04
| | | | | | | The bit is no longer used for session setup, only for session reset. Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-05 16:23:35 -0500