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2019-04-25xprtrdma: Increase maximum number of backchannel requestsChuck Lever1-3/+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>
2019-04-25xprtrdma: Backchannel can use GFP_KERNEL allocationsChuck Lever1-64/+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>
2019-04-25xprtrdma: Clean up regbuf helpersChuck Lever3-82/+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>
2019-04-25xprtrdma: De-duplicate "allocate new, free old regbuf"Chuck Lever3-47/+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>
2019-04-25xprtrdma: Allocate req's regbufs at xprt create timeChuck Lever4-25/+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>
2019-04-25xprtrdma: rpcrdma_regbuf alignmentChuck Lever5-29/+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>
2019-04-25xprtrdma: Clean up rpcrdma_create_rep() and rpcrdma_destroy_rep()Chuck Lever1-16/+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>
2019-04-25xprtrdma: Clean up rpcrdma_create_req()Chuck Lever3-17/+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>
2019-04-25xprtrdma: Fix an frwr_map recovery nitChuck Lever1-1/+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>
2019-04-25SUNRPC: Avoid digging into the ATOMIC poolChuck Lever2-2/+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>
2019-04-25SUNRPC: Add the 'softerr' rpc_client flagTrond Myklebust1-1/+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>
2019-04-25SUNRPC: Ensure to ratelimit the "server not responding" syslog messagesTrond Myklebust1-5/+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>
2019-04-25SUNRPC: Start the first major timeout calculation at task creationTrond Myklebust1-10/+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>
2019-04-25SUNRPC: Make "no retrans timeout" soft tasks behave like softconn for timeoutsTrond Myklebust1-0/+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>
2019-04-25SUNRPC: Add tracking of RPC level errorsTrond Myklebust2-13/+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>
2019-04-25SUNRPC: Ensure that the transport layer respect major timeoutsTrond Myklebust1-4/+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>
2019-04-25SUNRPC: Declare RPC timers as TIMER_DEFERRABLETrond Myklebust2-2/+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>
2019-04-25SUNRPC: Simplify queue timeouts using timer_reduce()Trond Myklebust1-4/+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>
2019-04-25SUNRPC: Fix up tracking of timeoutsTrond Myklebust3-2/+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>
2019-04-25SUNRPC: Add function rpc_sleep_on_timeout()Trond Myklebust5-33/+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>
2019-04-25SUNRPC: Remove unused argument 'action' from rpc_sleep_on_priority()Trond Myklebust1-4/+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>
2019-04-25SUNRPC: Refactor rpc_sleep_on()Trond Myklebust1-16/+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>
2019-04-25SUNRPC: Refactor xprt_request_wait_receive()Trond Myklebust4-43/+48
Convert the transport callback to actually put the request to sleep instead of just setting a timeout. This is in preparation for rpc_sleep_on_timeout(). Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2019-04-25SUNRPC: Refactor rpc_restart_call/rpc_restart_call_prepareTrond Myklebust1-13/+17
Clean up. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2019-04-25SUNRPC: Fix up task signallingTrond Myklebust3-17/+29
The RPC_TASK_KILLED flag should really not be set from another context because it can clobber data in the struct task when task->tk_flags is changed non-atomically. Let's therefore swap out RPC_TASK_KILLED with an atomic flag, and add a function to set that flag and safely wake up the task. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2019-04-25crypto: shash - remove shash_desc::flagsEric Biggers2-3/+0
The flags field in 'struct shash_desc' never actually does anything. The only ostensibly supported flag is CRYPTO_TFM_REQ_MAY_SLEEP. However, no shash algorithm ever sleeps, making this flag a no-op. With this being the case, inevitably some users who can't sleep wrongly pass MAY_SLEEP. These would all need to be fixed if any shash algorithm actually started sleeping. For example, the shash_ahash_*() functions, which wrap a shash algorithm with the ahash API, pass through MAY_SLEEP from the ahash API to the shash API. However, the shash functions are called under kmap_atomic(), so actually they're assumed to never sleep. Even if it turns out that some users do need preemption points while hashing large buffers, we could easily provide a helper function crypto_shash_update_large() which divides the data into smaller chunks and calls crypto_shash_update() and cond_resched() for each chunk. It's not necessary to have a flag in 'struct shash_desc', nor is it necessary to make individual shash algorithms aware of this at all. Therefore, remove shash_desc::flags, and document that the crypto_shash_*() functions can be called from any context. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2019-04-24SUNRPC: rsi_parse() should use the current user namespaceTrond Myklebust1-3/+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>
2019-04-24SUNRPC: Fix the server AUTH_UNIX userspace mappingsTrond Myklebust1-6/+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>
2019-04-24SUNRPC: Temporary sockets should inherit the cred from their parentTrond Myklebust1-2/+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>
2019-04-24SUNRPC: Cache the process user cred in the RPC server listenerTrond Myklebust2-5/+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>
2019-04-24SUNRPC: Allow further customisation of RPC program registrationTrond Myklebust1-31/+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>
2019-04-24SUNRPC: Clean up generic dispatcher codeTrond Myklebust1-28/+47
Simplify the generic server dispatcher. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2019-04-24SUNRPC: Add a callback to initialise server requestsTrond Myklebust1-37/+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>
2019-04-24SUNRPC/nfs: Fix return value for nfs4_callback_compound()Trond Myklebust1-5/+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>
2019-04-24sunrpc/cache: handle missing listeners better.NeilBrown1-1/+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>
2019-04-23Merge tag 'nfsd-5.1-1' of git://linux-nfs.org/~bfields/linuxLinus Torvalds1-0/+3
Pull nfsd bugfixes from Bruce Fields: "Fix miscellaneous nfsd bugs, in NFSv4.1 callbacks, NFSv4.1 lock-notification callbacks, NFSv3 readdir encoding, and the cache/upcall code" * tag 'nfsd-5.1-1' of git://linux-nfs.org/~bfields/linux: nfsd: wake blocked file lock waiters before sending callback nfsd: wake waiters blocked on file_lock before deleting it nfsd: Don't release the callback slot unless it was actually held nfsd/nfsd3_proc_readdir: fix buffer count and page pointers sunrpc: don't mark uninitialised items as VALID.
2019-04-17SUNRPC: Ignore queue transmission errors on successful transmissionTrond Myklebust1-2/+5
If a request transmission fails due to write space or slot unavailability errors, but the queued task then gets transmitted before it has time to process the error in call_transmit_status() or call_bc_transmit_status(), we need to suppress the transmission error code to prevent it from leaking out of the RPC layer. Reported-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com> Tested-by: Chuck Lever <chuck.lever@oracle.com>
2019-04-11Revert "SUNRPC: Micro-optimise when the task is known not to be sleeping"Trond Myklebust1-37/+8
This reverts commit 009a82f6437490c262584d65a14094a818bcb747. The ability to optimise here relies on compiler being able to optimise away tail calls to avoid stack overflows. Unfortunately, we are seeing reports of problems, so let's just revert. Reported-by: Daniel Mack <daniel@zonque.org> Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2019-04-11xprtrdma: Fix helper that drains the transportChuck Lever1-1/+1
We want to drain only the RQ first. Otherwise the transport can deadlock on ->close if there are outstanding Send completions. Fixes: 6d2d0ee27c7a ("xprtrdma: Replace rpcrdma_receive_wq ... ") Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Cc: stable@vger.kernel.org # v5.0+ Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2019-04-06sunrpc: don't mark uninitialised items as VALID.NeilBrown1-0/+3
A recent commit added a call to cache_fresh_locked() when an expired item was found. The call sets the CACHE_VALID flag, so it is important that the item actually is valid. There are two ways it could be valid: 1/ If ->update has been called to fill in relevant content 2/ if CACHE_NEGATIVE is set, to say that content doesn't exist. An expired item that is waiting for an update will be neither. Setting CACHE_VALID will mean that a subsequent call to cache_put() will be likely to dereference uninitialised pointers. So we must make sure the item is valid, and we already have code to do that in try_to_negate_entry(). This takes the hash lock and so cannot be used directly, so take out the two lines that we need and use them. Now cache_fresh_locked() is certain to be called only on a valid item. Cc: stable@kernel.org # 2.6.35 Fixes: 4ecd55ea0742 ("sunrpc: fix cache_head leak due to queued request") Signed-off-by: NeilBrown <neilb@suse.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2019-03-26SUNRPC: fix uninitialized variable warningAlakesh Haloi1-2/+2
Avoid following compiler warning on uninitialized variable net/sunrpc/xprtsock.c: In function ‘xs_read_stream_request.constprop’: net/sunrpc/xprtsock.c:525:10: warning: ‘read’ may be used uninitialized in this function [-Wmaybe-uninitialized] return read; ^~~~ net/sunrpc/xprtsock.c:529:23: warning: ‘ret’ may be used uninitialized in this function [-Wmaybe-uninitialized] return ret < 0 ? ret : read; ~~~~~~~~~~~~~~^~~~~~ Signed-off-by: Alakesh Haloi <alakesh.haloi@gmail.com> Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2019-03-23SUNRPC: Don't let RPC_SOFTCONN tasks time out if the transport is connectedTrond Myklebust1-1/+11
If the transport is still connected, then we do want to allow RPC_SOFTCONN tasks to retry. They should time out if and only if the connection is broken. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2019-03-16Merge tag 'nfs-for-5.1-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfsLinus Torvalds3-20/+16
Pull NFS client bugfixes from Trond Myklebust: "Highlights include: Bugfixes: - Fix an Oops in SUNRPC back channel tracepoints - Fix a SUNRPC client regression when handling oversized replies - Fix the minimal size for SUNRPC reply buffer allocation - rpc_decode_header() must always return a non-zero value on error - Fix a typo in pnfs_update_layout() Cleanup: - Remove redundant check for the reply length in call_decode()" * tag 'nfs-for-5.1-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfs: SUNRPC: Remove redundant check for the reply length in call_decode() SUNRPC: Handle the SYSTEM_ERR rpc error SUNRPC: rpc_decode_header() must always return a non-zero value on error SUNRPC: Use the ENOTCONN error on socket disconnect SUNRPC: Fix the minimal size for reply buffer allocation SUNRPC: Fix a client regression when handling oversized replies pNFS: Fix a typo in pnfs_update_layout fix null pointer deref in tracepoints in back channel
2019-03-15SUNRPC: Remove redundant check for the reply length in call_decode()Trond Myklebust1-4/+0
Now that we're using the xdr_stream functions to decode the header, the test for the minimum reply length is redundant. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2019-03-15SUNRPC: Handle the SYSTEM_ERR rpc errorTrond Myklebust1-0/+1
Handle the SYSTEM_ERR rpc error by retrying the RPC call as if it were a garbage argument. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2019-03-15SUNRPC: rpc_decode_header() must always return a non-zero value on errorTrond Myklebust1-13/+7
Ensure that when the "garbage args" case falls through, we do set an error of EIO. Fixes: a0584ee9aed8 ("SUNRPC: Use struct xdr_stream when decoding...") Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2019-03-15SUNRPC: Use the ENOTCONN error on socket disconnectTrond Myklebust1-1/+1
When the socket is closed, we currently send an EAGAIN error to all pending requests in order to ask them to retransmit. Use ENOTCONN instead, to ensure that they try to reconnect before attempting to transmit. This also helps SOFTCONN tasks to behave correctly in this situation. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2019-03-15SUNRPC: Fix the minimal size for reply buffer allocationTrond Myklebust1-1/+6
We must at minimum allocate enough memory to be able to see any auth errors in the reply from the server. Fixes: 2c94b8eca1a26 ("SUNRPC: Use au_rslack when computing reply...") Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2019-03-15SUNRPC: Fix a client regression when handling oversized repliesTrond Myklebust1-1/+1
If the server sends a reply that is larger than the pre-allocated buffer, then the current code may fail to register how much of the stream that it has finished reading. This again can lead to hangs. Fixes: e92053a52e68 ("SUNRPC: Handle zero length fragments correctly") Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2019-03-13Merge tag 'nfsd-5.1' of git://linux-nfs.org/~bfields/linuxLinus Torvalds6-47/+39
Pull NFS server updates from Bruce Fields: "Miscellaneous NFS server fixes. Probably the most visible bug is one that could artificially limit NFSv4.1 performance by limiting the number of oustanding rpcs from a single client. Neil Brown also gets a special mention for fixing a 14.5-year-old memory-corruption bug in the encoding of NFSv3 readdir responses" * tag 'nfsd-5.1' of git://linux-nfs.org/~bfields/linux: nfsd: allow nfsv3 readdir request to be larger. nfsd: fix wrong check in write_v4_end_grace() nfsd: fix memory corruption caused by readdir nfsd: fix performance-limiting session calculation svcrpc: fix UDP on servers with lots of threads svcrdma: Remove syslog warnings in work completion handlers svcrdma: Squelch compiler warning when SUNRPC_DEBUG is disabled svcrdma: Use struct_size() in kmalloc() svcrpc: fix unlikely races preventing queueing of sockets svcrpc: svc_xprt_has_something_to_do seems a little long SUNRPC: Don't allow compiler optimisation of svc_xprt_release_slot() nfsd: fix an IS_ERR() vs NULL check
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