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* Fix common misspellingsLucas De Marchi2011-03-312-3/+3
| | | | | | Fixes generated by 'codespell' and manually reviewed. Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
* NFS: Determine initial mount securityBryan Schumaker2011-03-241-0/+3
| | | | | | | | | 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>
* SUNRPC: Convert struct rpc_xprt to use atomic_t countersTrond Myklebust2011-03-171-2/+1
| | | | Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFSv4.1: filelayout async error handlerAndy Adamson2011-03-111-0/+1
| | | | | | | | | | | 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>
* SUNRPC: Close a race in __rpc_wait_for_completion_task()Trond Myklebust2011-03-101-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Although they run as rpciod background tasks, under normal operation (i.e. no SIGKILL), functions like nfs_sillyrename(), nfs4_proc_unlck() and nfs4_do_close() want to be fully synchronous. This means that when we exit, we want all references to the rpc_task to be gone, and we want any dentry references etc. held by that task to be released. For this reason these functions call __rpc_wait_for_completion_task(), followed by rpc_put_task() in the expectation that the latter will be releasing the last reference to the rpc_task, and thus ensuring that the callback_ops->rpc_release() has been called synchronously. This patch fixes a race which exists due to the fact that rpciod calls rpc_complete_task() (in order to wake up the callers of __rpc_wait_for_completion_task()) and then subsequently calls rpc_put_task() without ensuring that these two steps are done atomically. In order to avoid adding new spin locks, the patch uses the existing waitqueue spin lock to order the rpc_task reference count releases between the waiting process and rpciod. The common case where nobody is waiting for completion is optimised for by checking if the RPC_TASK_ASYNC flag is cleared and/or if the rpc_task reference count is 1: in those cases we drop trying to grab the spin lock, and immediately free up the rpc_task. Those few processes that need to put the rpc_task from inside an asynchronous context and that do not care about ordering are given a new helper: rpc_put_task_async(). Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS do not find client in NFSv4 pg_authenticateAndy Adamson2011-01-252-14/+0
| | | | | | | | | | 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>
* Merge branch 'for-2.6.38' of git://linux-nfs.org/~bfields/linuxLinus Torvalds2011-01-145-2/+6
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 'for-2.6.38' of git://linux-nfs.org/~bfields/linux: (62 commits) nfsd4: fix callback restarting nfsd: break lease on unlink, link, and rename nfsd4: break lease on nfsd setattr nfsd: don't support msnfs export option nfsd4: initialize cb_per_client nfsd4: allow restarting callbacks nfsd4: simplify nfsd4_cb_prepare nfsd4: give out delegations more quickly in 4.1 case nfsd4: add helper function to run callbacks nfsd4: make sure sequence flags are set after destroy_session nfsd4: re-probe callback on connection loss nfsd4: set sequence flag when backchannel is down nfsd4: keep finer-grained callback status rpc: allow xprt_class->setup to return a preexisting xprt rpc: keep backchannel xprt as long as server connection rpc: move sk_bc_xprt to svc_xprt nfsd4: allow backchannel recovery nfsd4: support BIND_CONN_TO_SESSION nfsd4: modify session list under cl_lock Documentation: fl_mylease no longer exists ... Fix up conflicts in fs/nfsd/vfs.c with the vfs-scale work. The vfs-scale work touched some msnfs cases, and this merge removes support for that entirely, so the conflict was trivial to resolve.
| * rpc: allow xprt_class->setup to return a preexisting xprtJ. Bruce Fields2011-01-111-0/+1
| | | | | | | | | | | | | | This allows us to reuse the xprt associated with a server connection if one has already been set up. Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| * rpc: move sk_bc_xprt to svc_xprtJ. Bruce Fields2011-01-112-1/+1
| | | | | | | | | | | | | | This seems obviously transport-level information even if it's currently used only by the server socket code. Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| * svcrpc: simpler request droppingJ. Bruce Fields2011-01-041-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently we use -EAGAIN returns to determine when to drop a deferred request. On its own, that is error-prone, as it makes us treat -EAGAIN returns from other functions specially to prevent inadvertent dropping. So, use a flag on the request instead. Returning an error on request deferral is still required, to prevent further processing, but we no longer need worry that an error return on its own could result in a drop. Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| * SUNRPC: Remove more code when NFSD_DEPRECATED is not configuredJ. Bruce Fields2011-01-041-0/+3
| | | | | | | | | | | | Signed-off-by: NeilBrown <neilb@suse.de> [bfields@redhat.com: moved svcauth_unix_purge outside ifdef's.] Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| * sunrpc: remove xpt_poolNeilBrown2010-12-171-1/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The xpt_pool field is only used for reporting BUGs. And it isn't used correctly. In particular, when it is cleared in svc_xprt_received before XPT_BUSY is cleared, there is no guarantee that either the compiler or the CPU might not re-order to two assignments, just setting xpt_pool to NULL after XPT_BUSY is cleared. If a different cpu were running svc_xprt_enqueue at this moment, it might see XPT_BUSY clear and then xpt_pool non-NULL, and so BUG. This could be fixed by calling smp_mb__before_clear_bit() before the clear_bit. However as xpt_pool isn't really used, it seems safest to simply remove xpt_pool. Another alternate would be to change the clear_bit to clear_bit_unlock, and the test_and_set_bit to test_and_set_bit_lock. Signed-off-by: NeilBrown <neilb@suse.de> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
* | Merge branch 'nfs-for-2.6.38' of ↵Linus Torvalds2011-01-116-11/+33
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.linux-nfs.org/projects/trondmy/nfs-2.6 * 'nfs-for-2.6.38' of git://git.linux-nfs.org/projects/trondmy/nfs-2.6: (89 commits) NFS fix the setting of exchange id flag NFS: Don't use vm_map_ram() in readdir NFSv4: Ensure continued open and lockowner name uniqueness NFS: Move cl_delegations to the nfs_server struct NFS: Introduce nfs_detach_delegations() NFS: Move cl_state_owners and related fields to the nfs_server struct NFS: Allow walking nfs_client.cl_superblocks list outside client.c pnfs: layout roc code pnfs: update nfs4_callback_recallany to handle layouts pnfs: add CB_LAYOUTRECALL handling pnfs: CB_LAYOUTRECALL xdr code pnfs: change lo refcounting to atomic_t pnfs: check that partial LAYOUTGET return is ignored pnfs: add layout to client list before sending rpc pnfs: serialize LAYOUTGET(openstateid) pnfs: layoutget rpc code cleanup pnfs: change how lsegs are removed from layout list pnfs: change layout state seqlock to a spinlock pnfs: add prefix to struct pnfs_layout_hdr fields pnfs: add prefix to struct pnfs_layout_segment fields ...
| * \ Merge branch 'bugfixes' into nfs-for-2.6.38Trond Myklebust2011-01-101-1/+3
| |\ \ | | | | | | | | | | | | | | | | | | | | | | | | Conflicts: fs/nfs/nfs2xdr.c fs/nfs/nfs3xdr.c fs/nfs/nfs4xdr.c
| | * | NFS: Don't use vm_map_ram() in readdirTrond Myklebust2011-01-101-1/+3
| | |/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | vm_map_ram() is not available on NOMMU platforms, and causes trouble on incoherrent architectures such as ARM when we access the page data through both the direct and the virtual mapping. The alternative is to use the direct mapping to access page data for the case when we are not crossing a page boundary, but to copy the data into a linear scratch buffer when we are accessing data that spans page boundaries. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> Tested-by: Marc Kleine-Budde <mkl@pengutronix.de> Cc: stable@kernel.org [2.6.37]
| * | NFS rename client back channel transport fieldAndy Adamson2011-01-062-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | Differentiate from server backchannel Signed-off-by: Andy Adamson <andros@netapp.com> Acked-by: Bruce Fields <bfields@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * | NFS refactor nfs_find_client and reference client across callback processingAndy Adamson2011-01-061-0/+13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fixes a bug where the nfs_client could be freed during callback processing. Refactor nfs_find_client to use minorversion specific means to locate the correct nfs_client structure. In the NFS layer, V4.0 clients are found using the callback_ident field in the CB_COMPOUND header. V4.1 clients are found using the sessionID in the CB_SEQUENCE operation which is also compared against the sessionID associated with the back channel thread after a successful CREATE_SESSION. Each of these methods finds the one an only nfs_client associated with the incoming callback request - so nfs_find_client_next is not needed. In the RPC layer, the pg_authenticate call needs to find the nfs_client. For the v4.0 callback service, the callback identifier has not been decoded so a search by address, version, and minorversion is used. The sessionid for the sessions based callback service has (usually) not been set for the pg_authenticate on a CB_NULL call which can be sent prior to the return of a CREATE_SESSION call, so the sessionid associated with the back channel thread is not used to find the client in pg_authenticate for CB_NULL calls. Pass the referenced nfs_client to each CB_COMPOUND operation being proceesed via the new cb_process_state structure. The reference is held across cb_compound processing. Use the new cb_process_state struct to move the NFS4ERR_RETRY_UNCACHED_REP processing from process_op into nfs4_callback_sequence where it belongs. Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * | NFS associate sessionid with callback connectionAndy Adamson2011-01-061-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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>
| * | SUNRPC register and unregister the back channel transportAndy Adamson2011-01-061-1/+0
| | | | | | | | | | | | | | | Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * | SUNRPC new transport for the NFSv4.1 shared back channelAndy Adamson2011-01-061-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Move the current sock create and destroy routines into the new transport ops. Back channel socket will be destroyed by the svc_closs_all call in svc_destroy. Added check: only TCP supported on shared back channel. Signed-off-by: Andy Adamson <andros@netapp.com> Acked-by: Bruce Fields <bfields@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * | SUNRPC: New xdr_streams XDR decoder APIChuck Lever2010-12-163-4/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Now that all client-side XDR decoder routines use xdr_streams, there should be no need to support the legacy calling sequence [rpc_rqst *, __be32 *, RPC res *] anywhere. We can construct an xdr_stream in the generic RPC code, instead of in each decoder function. This is a refactoring change. It should not cause different behavior. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Tested-by: J. Bruce Fields <bfields@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * | SUNRPC: New xdr_streams XDR encoder APIChuck Lever2010-12-163-5/+10
| |/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Now that all client-side XDR encoder routines use xdr_streams, there should be no need to support the legacy calling sequence [rpc_rqst *, __be32 *, RPC arg *] anywhere. We can construct an xdr_stream in the generic RPC code, instead of in each encoder function. Also, all the client-side encoder functions return 0 now, making a return value superfluous. Take this opportunity to convert them to return void instead. This is a refactoring change. It should not cause different behavior. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Tested-by: J. Bruce Fields <bfields@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* | headers: kobject.h reduxAlexey Dobriyan2011-01-101-0/+1
|/ | | | | | | | Remove kobject.h from files which don't need it, notably, sched.h and fs.h. Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* nfsd4: fix 4.1 connection registration raceJ. Bruce Fields2010-11-021-4/+14
| | | | | | | | If a connection is closed just after a sequence or create_session is sent over it, we could end up trying to register a callback that will never get called since the xprt is already marked dead. Signed-off-by: J. Bruce Fields <bfields@redhat.com>
* Merge branch 'for-2.6.37' of git://linux-nfs.org/~bfields/linuxLinus Torvalds2010-10-268-75/+98
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 'for-2.6.37' of git://linux-nfs.org/~bfields/linux: (99 commits) svcrpc: svc_tcp_sendto XPT_DEAD check is redundant svcrpc: no need for XPT_DEAD check in svc_xprt_enqueue svcrpc: assume svc_delete_xprt() called only once svcrpc: never clear XPT_BUSY on dead xprt nfsd4: fix connection allocation in sequence() nfsd4: only require krb5 principal for NFSv4.0 callbacks nfsd4: move minorversion to client nfsd4: delay session removal till free_client nfsd4: separate callback change and callback probe nfsd4: callback program number is per-session nfsd4: track backchannel connections nfsd4: confirm only on succesful create_session nfsd4: make backchannel sequence number per-session nfsd4: use client pointer to backchannel session nfsd4: move callback setup into session init code nfsd4: don't cache seq_misordered replies SUNRPC: Properly initialize sock_xprt.srcaddr in all cases SUNRPC: Use conventional switch statement when reclassifying sockets sunrpc/xprtrdma: clean up workqueue usage sunrpc: Turn list_for_each-s into the ..._entry-s ... Fix up trivial conflicts (two different deprecation notices added in separate branches) in Documentation/feature-removal-schedule.txt
| * nfsd: provide callbacks on svc_xprt deletionJ. Bruce Fields2010-10-011-0/+25
| | | | | | | | | | | | | | | | NFSv4.1 needs warning when a client tcp connection goes down, if that connection is being used as a backchannel, so that it can warn the client that it has lost the backchannel connection. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
| * nfsd4: remove spkm3J. Bruce Fields2010-10-011-55/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Unfortunately, spkm3 never got very far; while interoperability with one other implementation was demonstrated at some point, problems were found with the spec that were deemed not worth fixing. The kernel code is useless on its own without nfs-utils patches which were never merged into nfs-utils, and were only ever available from citi.umich.edu. They appear not to have been updated since 2005. Therefore it seems safe to assume that this code has no users, and never will. Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| * sunrpc: Tag rpc_xprt with netPavel Emelyanov2010-10-011-1/+2
| | | | | | | | | | | | | | | | | | The net is known from the xprt_create and this tagging will also give un the context in the conntection workers where real sockets are created. Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| * sunrpc: Add net to xprt_createPavel Emelyanov2010-10-011-0/+1
| | | | | | | | | | Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| * sunrpc: Add net to rpc_create_argsPavel Emelyanov2010-10-011-0/+1
| | | | | | | | | | Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| * sunrpc: Pull net argument downto svc_create_socketPavel Emelyanov2010-10-011-0/+1
| | | | | | | | | | | | | | After this the socket creation in it knows the context. Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| * sunrpc: Add net argument to svc_create_xprtPavel Emelyanov2010-10-011-2/+2
| | | | | | | | | | Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| * sunrpc: Factor out rpc_xprt freeingPavel Emelyanov2010-10-011-0/+1
| | | | | | | | | | Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| * sunrpc: Factor out rpc_xprt allocationPavel Emelyanov2010-10-011-0/+1
| | | | | | | | | | Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| * sunrpc: fix up rpcauth_remove_module section mismatchStephen Rothwell2010-09-291-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | On Wed, 29 Sep 2010 14:02:38 +1000 Stephen Rothwell <sfr@canb.auug.org.au> wrote: > > After merging the final tree, today's linux-next build (powerpc > ppc44x_defconfig) produced tis warning: > > WARNING: net/sunrpc/sunrpc.o(.init.text+0x110): Section mismatch in reference from the function init_sunrpc() to the function .exit.text:rpcauth_remove_module() > The function __init init_sunrpc() references > a function __exit rpcauth_remove_module(). > This is often seen when error handling in the init function > uses functionality in the exit path. > The fix is often to remove the __exit annotation of > rpcauth_remove_module() so it may be used outside an exit section. > > Probably caused by commit 2f72c9b73730c335381b13e2bd221abe1acea394 > ("sunrpc: The per-net skeleton"). This actually causes a build failure on a sparc32 defconfig build: `rpcauth_remove_module' referenced in section `.init.text' of net/built-in.o: defined in discarded section `.exit.text' of net/built-in.o I applied the following patch for today: Fixes: `rpcauth_remove_module' referenced in section `.init.text' of net/built-in.o: defined in discarded section `.exit.text' of net/built-in.o Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Acked-by: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| * sunrpc: Make the /proc/net/rpc appear in net namespacesPavel Emelyanov2010-09-271-8/+15
| | | | | | | | | | Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| * sunrpc: Tag svc_xprt with netPavel Emelyanov2010-09-271-0/+2
| | | | | | | | | | | | | | The transport representation should be per-net of course. Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| * sunrpc: Add routines that allow registering per-net cachesPavel Emelyanov2010-09-271-0/+2
| | | | | | | | | | | | | | Existing calls do the same, but for the init_net. Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| * sunrpc: Add net to pure API callsPavel Emelyanov2010-09-271-2/+2
| | | | | | | | | | | | | | | | | | There are two calls that operate on ip_map_cache and are directly called from the nfsd code. Other places will be handled in a different way. Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| * sunrpc: Make xprt auth cache release work with the xprtPavel Emelyanov2010-09-271-1/+2
| | | | | | | | | | | | | | | | This is done in order to facilitate getting the ip_map_cache from which to put the ip_map. Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| * sunrpc/cache: change deferred-request hash table to use hlist.NeilBrown2010-09-211-1/+1
| | | | | | | | | | | | | | | | | | | | | | Being a hash table, hlist is the best option. There is currently some ugliness were we treat "->next == NULL" as a special case to avoid having to initialise the whole array. This change nicely gets rid of that case. Signed-off-by: NeilBrown <neilb@suse.de> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| * sunrpc: close connection when a request is irretrievably lost.NeilBrown2010-09-211-3/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | If we drop a request in the sunrpc layer, either due kmalloc failure, or due to a cache miss when we could not queue the request for later replay, then close the connection to encourage the client to retry sooner. Note that if the drop happens in the NFS layer, NFSERR_JUKEBOX (aka NFS4ERR_DELAY) is returned to guide the client concerning replay. Signed-off-by: NeilBrown <neilb@suse.de> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| * Merge remote branch 'trond/bugfixes' into for-2.6.37J. Bruce Fields2010-09-191-1/+1
| |\ | | | | | | | | | Without some client-side fixes, server testing is currently difficult.
| * | sunrpc/cache: allow threads to block while waiting for cache update.NeilBrown2010-09-071-0/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The current practice of waiting for cache updates by queueing the whole request to be retried has (at least) two problems. 1/ With NFSv4, requests can be quite complex and re-trying a whole request when a later part fails should only be a last-resort, not a normal practice. 2/ Large requests, and in particular any 'write' request, will not be queued by the current code and doing so would be undesirable. In many cases only a very sort wait is needed before the cache gets valid data. So, providing the underlying transport permits it by setting ->thread_wait, arrange to wait briefly for an upcall to be completed (as reflected in the clearing of CACHE_PENDING). If the short wait was not long enough and CACHE_PENDING is still set, fall back on the old approach. The 'thread_wait' value is set to 5 seconds when there are spare threads, and 1 second when there are no spare threads. These values are probably much higher than needed, but will ensure some forward progress. Note that as we only request an update for a non-valid item, and as non-valid items are updated in place it is extremely unlikely that cache_check will return -ETIMEDOUT. Normally cache_defer_req will sleep for a short while and then find that the item is_valid. Signed-off-by: NeilBrown <neilb@suse.de> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| * | sunrpc: use seconds since boot in expiry cacheNeilBrown2010-09-071-3/+25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This protects us from confusion when the wallclock time changes. We convert to and from wallclock when setting or reading expiry times. Also use seconds since boot for last_clost time. Signed-off-by: NeilBrown <neilb@suse.de> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| * | sunrpc: extract some common sunrpc_cache code from nfsdNeilBrown2010-09-071-0/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Rather can duplicating this idiom twice, put it in an inline function. This reduces the usage of 'expiry_time' out side the sunrpc/cache.c code and thus the impact of a change that is about to be made to that field. Signed-off-by: NeilBrown <neilb@suse.de> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
* | | Merge branch 'nfs-for-2.6.37' of ↵Linus Torvalds2010-10-261-0/+7
|\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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
| * | | SUNRPC: define xdr_decode_opaque_fixedBenny Halevy2010-10-241-0/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | A helper for decoding a fixed length opaque value. Returns a pointer to the next item in the xdr stream. Signed-off-by: Benny Halevy <bhalevy@panasas.com> 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 Torvalds2010-10-252-1/+2
|\ \ \ \ | |/ / / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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 ...
| * | | SUNRPC: Add a helper function xdr_inline_peekTrond Myklebust2010-10-231-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | We sometimes need to be able to read ahead in an xdr_stream without incrementing the current pointer position. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
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