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* Merge tag 'nfsd-5.2' of git://linux-nfs.org/~bfields/linuxLinus Torvalds2019-05-156-117/+227
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull nfsd updates from Bruce Fields: "This consists mostly of nfsd container work: Scott Mayhew revived an old api that communicates with a userspace daemon to manage some on-disk state that's used to track clients across server reboots. We've been using a usermode_helper upcall for that, but it's tough to run those with the right namespaces, so a daemon is much friendlier to container use cases. Trond fixed nfsd's handling of user credentials in user namespaces. He also contributed patches that allow containers to support different sets of NFS protocol versions. The only remaining container bug I'm aware of is that the NFS reply cache is shared between all containers. If anyone's aware of other gaps in our container support, let me know. The rest of this is miscellaneous bugfixes" * tag 'nfsd-5.2' of git://linux-nfs.org/~bfields/linux: (23 commits) nfsd: update callback done processing locks: move checks from locks_free_lock() to locks_release_private() nfsd: fh_drop_write in nfsd_unlink nfsd: allow fh_want_write to be called twice nfsd: knfsd must use the container user namespace SUNRPC: rsi_parse() should use the current user namespace SUNRPC: Fix the server AUTH_UNIX userspace mappings lockd: Pass the user cred from knfsd when starting the lockd server SUNRPC: Temporary sockets should inherit the cred from their parent SUNRPC: Cache the process user cred in the RPC server listener nfsd: Allow containers to set supported nfs versions nfsd: Add custom rpcbind callbacks for knfsd SUNRPC: Allow further customisation of RPC program registration SUNRPC: Clean up generic dispatcher code SUNRPC: Add a callback to initialise server requests SUNRPC/nfs: Fix return value for nfs4_callback_compound() nfsd: handle legacy client tracking records sent by nfsdcld nfsd: re-order client tracking method selection nfsd: keep a tally of RECLAIM_COMPLETE operations when using nfsdcld nfsd: un-deprecate nfsdcld ...
| * SUNRPC: rsi_parse() should use the current user namespaceTrond Myklebust2019-04-241-3/+3
| | | | | | | | | | | | | | | | rsi_parse() is part of a downcall, so we must assume that the uids and gids are encoded using the current user namespace. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| * SUNRPC: Fix the server AUTH_UNIX userspace mappingsTrond Myklebust2019-04-241-6/+9
| | | | | | | | | | | | | | | | | | | | | | gid_parse() is part of a downcall, so uids and gids should be assumed encoded using the current user namespace. svcauth_unix_accept() is, on the other hand, decoding uids and gids from the wire, so we assume those are encoded to match the user namespace of the server process. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| * SUNRPC: Temporary sockets should inherit the cred from their parentTrond Myklebust2019-04-241-2/+3
| | | | | | | | | | | | | | | | Temporary sockets should inherit the credential (and hence the user namespace) from the parent listener transport. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| * SUNRPC: Cache the process user cred in the RPC server listenerTrond Myklebust2019-04-242-5/+11
| | | | | | | | | | | | | | | | | | In order to be able to interpret uids and gids correctly in knfsd, we should cache the user namespace of the process that created the RPC server's listener. To do so, we refcount the credential of that process. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| * SUNRPC: Allow further customisation of RPC program registrationTrond Myklebust2019-04-241-31/+54
| | | | | | | | | | | | | | | | | | | | Add a callback to allow customisation of the rpcbind registration. When clients have the ability to turn on and off version support, we want to allow them to also prevent registration of those versions with the rpc portmapper. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| * SUNRPC: Clean up generic dispatcher codeTrond Myklebust2019-04-241-28/+47
| | | | | | | | | | | | | | Simplify the generic server dispatcher. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| * SUNRPC: Add a callback to initialise server requestsTrond Myklebust2019-04-241-37/+76
| | | | | | | | | | | | | | | | | | Add a callback to help initialise server requests before they are processed. This will allow us to clean up the NFS server version support, and to make it container safe. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| * SUNRPC/nfs: Fix return value for nfs4_callback_compound()Trond Myklebust2019-04-241-5/+22
| | | | | | | | | | | | | | | | | | | | | | | | RPC server procedures are normally expected to return a __be32 encoded status value of type 'enum rpc_accept_stat', however at least one function wants to return an authentication status of type 'enum rpc_auth_stat' in the case where authentication fails. This patch adds functionality to allow this. Fixes: a4e187d83d88 ("NFS: Don't drop CB requests with invalid principals") Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| * sunrpc/cache: handle missing listeners better.NeilBrown2019-04-241-1/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If no handler (such as rpc.mountd) has opened a cache 'channel', the sunrpc cache responds to all lookup requests with -ENOENT. This is particularly important for the auth.unix.gid cache which is optional. If the channel was open briefly and an upcall was written to it, this upcall remains pending even when the handler closes the channel. When an upcall is pending, the code currently doesn't check if there are still listeners, it only performs that check before sending an upcall. As the cache treads a recently closes channel (closed less than 30 seconds ago) as "potentially still open", there is a reasonable sized window when a request can become pending in a closed channel, and thereby block lookups indefinitely. This can easily be demonstrated by running cat /proc/net/rpc/auth.unix.gid/channel and then trying to mount an NFS filesystem from this host. It will block indefinitely (unless mountd is run with --manage-gids, or krb5 is used). When cache_check() finds that an upcall is pending, it should perform the "cache_listeners_exist()" exist test. If no listeners do exist, the request should be negated. With this change in place, there can still be a 30second wait on mount, until the cache gives up waiting for a handler to come back, but this is much better than an indefinite wait. Signed-off-by: NeilBrown <neilb@suse.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
* | Merge tag 'nfs-for-5.2-1' of git://git.linux-nfs.org/projects/anna/linux-nfsLinus Torvalds2019-05-0916-649/+764
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull NFS client updates from Anna Schumaker: "Highlights include: Stable bugfixes: - Fall back to MDS if no deviceid is found rather than aborting # v4.11+ - NFS4: Fix v4.0 client state corruption when mount Features: - Much improved handling of soft mounts with NFS v4.0: - Reduce risk of false positive timeouts - Faster failover of reads and writes after a timeout - Added a "softerr" mount option to return ETIMEDOUT instead of EIO to the application after a timeout - Increase number of xprtrdma backchannel requests - Add additional xprtrdma tracepoints - Improved send completion batching for xprtrdma Other bugfixes and cleanups: - Return -EINVAL when NFS v4.2 is passed an invalid dedup mode - Reduce usage of GFP_ATOMIC pages in SUNRPC - Various minor NFS over RDMA cleanups and bugfixes - Use the correct container namespace for upcalls - Don't share superblocks between user namespaces - Various other container fixes - Make nfs_match_client() killable to prevent soft lockups - Don't mark all open state for recovery when handling recallable state revoked flag" * tag 'nfs-for-5.2-1' of git://git.linux-nfs.org/projects/anna/linux-nfs: (69 commits) SUNRPC: Rebalance a kref in auth_gss.c NFS: Fix a double unlock from nfs_match,get_client nfs: pass the correct prototype to read_cache_page NFSv4: don't mark all open state for recovery when handling recallable state revoked flag SUNRPC: Fix an error code in gss_alloc_msg() SUNRPC: task should be exit if encode return EKEYEXPIRED more times NFS4: Fix v4.0 client state corruption when mount PNFS fallback to MDS if no deviceid found NFS: make nfs_match_client killable lockd: Store the lockd client credential in struct nlm_host NFS: When mounting, don't share filesystems between different user namespaces NFS: Convert NFSv2 to use the container user namespace NFSv4: Convert the NFS client idmapper to use the container user namespace NFS: Convert NFSv3 to use the container user namespace SUNRPC: Use namespace of listening daemon in the client AUTH_GSS upcall SUNRPC: Use the client user namespace when encoding creds NFS: Store the credential of the mount process in the nfs_server SUNRPC: Cache cred of process creating the rpc_client xprtrdma: Remove stale comment xprtrdma: Update comments that reference ib_drain_qp ...
| * | SUNRPC: Rebalance a kref in auth_gss.cChuck Lever2019-05-091-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | Restore the kref_get that matches the gss_put_auth(gss_msg->auth) done by gss_release_msg(). Fixes: ac83228a7101 ("SUNRPC: Use namespace of listening daemon ...") Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
| * | SUNRPC: Fix an error code in gss_alloc_msg()Dan Carpenter2019-05-091-1/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | If kstrdup_const() then this function returns zero (success) but it should return -ENOMEM. Fixes: ac83228a7101 ("SUNRPC: Use namespace of listening daemon in the client AUTH_GSS upcall") Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
| * | SUNRPC: task should be exit if encode return EKEYEXPIRED more timesZhangXiaoxu2019-05-091-1/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If the rpc.gssd always return cred success, but now the cred is expired, then the task will loop in call_refresh and call_transmit. Exit the rpc task after retry. Signed-off-by: ZhangXiaoxu <zhangxiaoxu5@huawei.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
| * | SUNRPC: Use namespace of listening daemon in the client AUTH_GSS upcallTrond Myklebust2019-04-261-16/+44
| | | | | | | | | | | | | | | | | | | | | | | | When the client needs to talk to rpc.gssd, we should ensure that the uid argument is encoded to match the user namespace of the daemon. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
| * | SUNRPC: Use the client user namespace when encoding credsTrond Myklebust2019-04-262-7/+13
| | | | | | | | | | | | | | | | | | | | | | | | When encoding AUTH_UNIX creds and AUTH_GSS upcalls, use the user namespace of the process that created the rpc client. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
| * | SUNRPC: Cache cred of process creating the rpc_clientTrond Myklebust2019-04-262-2/+14
| | | | | | | | | | | | | | | | | | | | | | | | When converting kuids to AUTH_UNIX creds, etc we will want to use the same user namespace as the process that created the rpc client. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
| * | xprtrdma: Remove stale commentChuck Lever2019-04-251-7/+0
| | | | | | | | | | | | | | | | | | | | | The comment hasn't been accurate for several years. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
| * | xprtrdma: Update comments that reference ib_drain_qpChuck Lever2019-04-251-4/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | Commit e1ede312f17e ("xprtrdma: Fix helper that drains the transport") replaced the ib_drain_qp() call, so update documenting comments to reflect current operation. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
| * | xprtrdma: Remove pr_err() call sites from completion handlersChuck Lever2019-04-252-28/+4
| | | | | | | | | | | | | | | | | | | | | Clean up: rely on the trace points instead. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
| * | xprtrdma: Eliminate struct rpcrdma_create_data_internalChuck Lever2019-04-254-71/+46
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Clean up. Move the remaining field in rpcrdma_create_data_internal so the structure can be removed. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
| * | xprtrdma: Aggregate the inline settings in struct rpcrdma_epChuck Lever2019-04-255-36/+41
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Clean up. The inline settings are actually a characteristic of the endpoint, and not related to the device. They are also modified after the transport instance is created, so they do not belong in the cdata structure either. Lastly, let's use names that are more natural to RDMA than to NFS: inline_write -> inline_send and inline_read -> inline_recv. The /proc files retain their names to avoid breaking user space. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
| * | xprtrdma: Remove rpcrdma_create_data_internal::rsize and wsizeChuck Lever2019-04-252-11/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Clean up. xprt_rdma_max_inline_{read,write} cannot be set to large values by virtue of proc_dointvec_minmax. The current maximum is RPCRDMA_MAX_INLINE, which is much smaller than RPCRDMA_MAX_SEGS * PAGE_SIZE. The .rsize and .wsize fields are otherwise unused in the current code base, and thus can be removed. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
| * | SUNRPC: Update comments based on recent changesChuck Lever2019-04-251-2/+2
| | | | | | | | | | | | | | | Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
| * | xprtrdma: Eliminate rpcrdma_ia::ri_deviceChuck Lever2019-04-253-28/+25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Clean up. Since commit 54cbd6b0c6b9 ("xprtrdma: Delay DMA mapping Send and Receive buffers"), a pointer to the device is now saved in each regbuf when it is DMA mapped. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
| * | xprtrdma: More Send completion batchingChuck Lever2019-04-252-13/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Instead of using a fixed number, allow the amount of Send completion batching to vary based on the client's maximum credit limit. - A larger default gives a small boost to IOPS throughput - Reducing it based on max_requests gives a safe result when the max credit limit is cranked down (eg. when the device has a small max_qp_wr). Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
| * | xprtrdma: Clean up sendctx functionsChuck Lever2019-04-253-26/+23
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Minor clean-ups I've stumbled on since sendctx was merged last year. In particular, making Send completion processing more efficient appears to have a measurable impact on IOPS throughput. Note: test_and_clear_bit() returns a value, thus an explicit memory barrier is not necessary. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
| * | xprtrdma: Trace marshaling failuresChuck Lever2019-04-251-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | Record an event when rpcrdma_marshal_req returns a non-zero return value to help track down why an xprt close might have occurred. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
| * | xprtrdma: Increase maximum number of backchannel requestsChuck Lever2019-04-251-3/+5
| | | | | | | | | | | | | | | | | | | | | | | | Reflects the change introduced in commit 067c46967160 ("NFSv4.1: Bump the default callback session slot count to 16"). Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
| * | xprtrdma: Backchannel can use GFP_KERNEL allocationsChuck Lever2019-04-251-64/+40
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The Receive handler runs in process context, thus can use on-demand GFP_KERNEL allocations instead of pre-allocation. This makes the xprtrdma backchannel independent of the number of backchannel session slots provisioned by the Upper Layer protocol. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
| * | xprtrdma: Clean up regbuf helpersChuck Lever2019-04-253-82/+80
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | For code legibility, clean up the function names to be consistent with the pattern: "rpcrdma" _ object-type _ action Also rpcrdma_regbuf_alloc and rpcrdma_regbuf_free no longer have any callers outside of verbs.c, and can thus be made static. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
| * | xprtrdma: De-duplicate "allocate new, free old regbuf"Chuck Lever2019-04-253-47/+39
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Clean up by providing an API to do this common task. At this point, the difference between rpcrdma_get_sendbuf and rpcrdma_get_recvbuf has become tiny. These can be collapsed into a single helper. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
| * | xprtrdma: Allocate req's regbufs at xprt create timeChuck Lever2019-04-254-25/+33
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Allocating an rpcrdma_req's regbufs at xprt create time enables a pair of micro-optimizations: First, if these regbufs are always there, we can eliminate two conditional branches from the hot xprt_rdma_allocate path. Second, by allocating a 1KB buffer, it places a lower bound on the size of these buffers, without adding yet another conditional branch. The lower bound reduces the number of hardway re- allocations. In fact, for some workloads it completely eliminates hardway allocations. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
| * | xprtrdma: rpcrdma_regbuf alignmentChuck Lever2019-04-255-29/+35
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Allocate the struct rpcrdma_regbuf separately from the I/O buffer to better guarantee the alignment of the I/O buffer and eliminate the wasted space between the rpcrdma_regbuf metadata and the buffer itself. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
| * | xprtrdma: Clean up rpcrdma_create_rep() and rpcrdma_destroy_rep()Chuck Lever2019-04-251-16/+9
| | | | | | | | | | | | | | | | | | | | | | | | For code legibility, clean up the function names to be consistent with the pattern: "rpcrdma" _ object-type _ action Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
| * | xprtrdma: Clean up rpcrdma_create_req()Chuck Lever2019-04-253-17/+21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Eventually, I'd like to invoke rpcrdma_create_req() during the call_reserve step. Memory allocation there probably needs to use GFP_NOIO. Therefore a set of GFP flags needs to be passed in. As an additional clean up, just return a pointer or NULL, because the only error return code here is -ENOMEM. Lastly, clean up the function names to be consistent with the pattern: "rpcrdma" _ object-type _ action Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
| * | xprtrdma: Fix an frwr_map recovery nitChuck Lever2019-04-251-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | After a DMA map failure in frwr_map, mark the MR so that recycling won't attempt to DMA unmap it. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Fixes: e2f34e26710b ("xprtrdma: Yet another double DMA-unmap") Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
| * | SUNRPC: Avoid digging into the ATOMIC poolChuck Lever2019-04-252-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | Page allocation requests made when the SPARSE_PAGES flag is set are allowed to fail, and are not critical. No need to spend a rare resource. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
| * | SUNRPC: Add the 'softerr' rpc_client flagTrond Myklebust2019-04-251-1/+7
| | | | | | | | | | | | | | | | | | | | | | | | Add the 'softerr' rpc client flag that sets the RPC_TASK_TIMEOUT flag on all new rpc tasks that are attached to that rpc client. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
| * | SUNRPC: Ensure to ratelimit the "server not responding" syslog messagesTrond Myklebust2019-04-251-5/+7
| | | | | | | | | | | | | | | | | | | | | | | | In particular, the timeout messages can be very noisy, so we ought to ratelimit them in order to avoid spamming the syslog. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
| * | SUNRPC: Start the first major timeout calculation at task creationTrond Myklebust2019-04-251-10/+34
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When calculating the major timeout for a new task, when we know that the connection has been broken, use the task->tk_start to ensure that we also take into account the time spent waiting for a slot or session slot. This ensures that we fail over soft requests relatively quickly once the connection has actually been broken, and the first requests have started to fail. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
| * | SUNRPC: Make "no retrans timeout" soft tasks behave like softconn for timeoutsTrond Myklebust2019-04-251-0/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If a soft NFSv4 request is sent, then we don't need it to time out unless the connection breaks. The reason is that as long as the connection is unbroken, the protocol states that the server is not allowed to drop the request. IOW: as long as the connection remains unbroken, the client may assume that all transmitted RPC requests are being processed by the server, and that retransmissions and timeouts of those requests are unwarranted. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
| * | SUNRPC: Add tracking of RPC level errorsTrond Myklebust2019-04-252-13/+28
| | | | | | | | | | | | | | | | | | | | | | | | | | | Add variables to track RPC level errors so that we can distinguish between issue that arose in the RPC transport layer as opposed to those arising from the reply message. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
| * | SUNRPC: Ensure that the transport layer respect major timeoutsTrond Myklebust2019-04-251-4/+13
| | | | | | | | | | | | | | | | | | | | | | | | Ensure that when in the transport layer, we don't sleep past a major timeout. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
| * | SUNRPC: Declare RPC timers as TIMER_DEFERRABLETrond Myklebust2019-04-252-2/+6
| | | | | | | | | | | | | | | | | | | | | | | | Don't wake idle CPUs only for the purpose of servicing an RPC queue timeout. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
| * | SUNRPC: Simplify queue timeouts using timer_reduce()Trond Myklebust2019-04-251-4/+2
| | | | | | | | | | | | | | | | | | | | | | | | Simplify the setting of queue timeouts by using the timer_reduce() function. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
| * | SUNRPC: Fix up tracking of timeoutsTrond Myklebust2019-04-253-2/+16
| | | | | | | | | | | | | | | | | | | | | | | | Add a helper to ensure that debugfs and friends print out the correct current task timeout value. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
| * | SUNRPC: Add function rpc_sleep_on_timeout()Trond Myklebust2019-04-255-33/+81
| | | | | | | | | | | | | | | | | | | | | | | | | | | Clean up the RPC task sleep interfaces by replacing the task->tk_timeout 'hidden parameter' to rpc_sleep_on() with a new function that takes an absolute timeout. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
| * | SUNRPC: Remove unused argument 'action' from rpc_sleep_on_priority()Trond Myklebust2019-04-251-4/+3
| | | | | | | | | | | | | | | | | | | | | None of the callers set the 'action' argument, so let's just remove it. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
| * | SUNRPC: Refactor rpc_sleep_on()Trond Myklebust2019-04-251-16/+24
| | | | | | | | | | | | | | | | | | | | | | | | | | | rpc_sleep_on() does not need to set the task->tk_callback under the queue lock, so move that out. Also refactor the check for whether the task is active. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-05 22:22:02 +0000