Merge tag 'nfsd-6.1' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux

Pull nfsd updates from Chuck Lever:
 "This release is mostly bug fixes, clean-ups, and optimizations.

  One notable set of fixes addresses a subtle buffer overflow issue that
  occurs if a small RPC Call message arrives in an oversized RPC record.
  This is only possible on a framed RPC transport such as TCP.

  Because NFSD shares the receive and send buffers in one set of pages,
  an oversized RPC record steals pages from the send buffer that will be
  used to construct the RPC Reply message. NFSD must not assume that a
  full-sized buffer is always available to it; otherwise, it will walk
  off the end of the send buffer while constructing its reply.

  In this release, we also introduce the ability for the server to wait
  a moment for clients to return delegations before it responds with
  NFS4ERR_DELAY. This saves a retransmit and a network round- trip when
  a delegation recall is needed. This work will be built upon in future
  releases.

  The NFS server adds another shrinker to its collection. Because
  courtesy clients can linger for quite some time, they might be
  freeable when the server host comes under memory pressure. A new
  shrinker has been added that releases courtesy client resources during
  low memory scenarios.

  Lastly, of note: the maximum number of operations per NFSv4 COMPOUND
  that NFSD can handle is increased from 16 to 50. There are NFSv4
  client implementations that need more than 16 to successfully perform
  a mount operation that uses a pathname with many components"

* tag 'nfsd-6.1' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux: (53 commits)
  nfsd: extra checks when freeing delegation stateids
  nfsd: make nfsd4_run_cb a bool return function
  nfsd: fix comments about spinlock handling with delegations
  nfsd: only fill out return pointer on success in nfsd4_lookup_stateid
  NFSD: fix use-after-free on source server when doing inter-server copy
  NFSD: Cap rsize_bop result based on send buffer size
  NFSD: Rename the fields in copy_stateid_t
  nfsd: use DEFINE_SHOW_ATTRIBUTE to define nfsd_file_cache_stats_fops
  nfsd: use DEFINE_SHOW_ATTRIBUTE to define nfsd_reply_cache_stats_fops
  nfsd: use DEFINE_SHOW_ATTRIBUTE to define client_info_fops
  nfsd: use DEFINE_SHOW_ATTRIBUTE to define export_features_fops and supported_enctypes_fops
  nfsd: use DEFINE_PROC_SHOW_ATTRIBUTE to define nfsd_proc_ops
  NFSD: Pack struct nfsd4_compoundres
  NFSD: Remove unused nfsd4_compoundargs::cachetype field
  NFSD: Remove "inline" directives on op_rsize_bop helpers
  NFSD: Clean up nfs4svc_encode_compoundres()
  SUNRPC: Fix typo in xdr_buf_subsegment's kdoc comment
  NFSD: Clean up WRITE arg decoders
  NFSD: Use xdr_inline_decode() to decode NFSv3 symlinks
  NFSD: Refactor common code out of dirlist helpers
  ...

32 files changed, 770 insertions, 379 deletions

diff --git a/fs/lockd/host.c b/fs/lockd/host.c
index f802223e71ab..cdc8e12cdac4 100644
--- a/fs/lockd/host.c
+++ b/fs/lockd/host.c
@@ -164,7 +164,7 @@ static struct nlm_host *nlm_alloc_host(struct nlm_lookup_host_info *ni,
 	host->h_addrbuf    = nsm->sm_addrbuf;
 	host->net	   = ni->net;
 	host->h_cred	   = get_cred(ni->cred);
-	strlcpy(host->nodename, utsname()->nodename, sizeof(host->nodename));
+	strscpy(host->nodename, utsname()->nodename, sizeof(host->nodename));
 
 out:
 	return host;
diff --git a/fs/lockd/svc4proc.c b/fs/lockd/svc4proc.c
index bf274f23969b..284b019cb652 100644
--- a/fs/lockd/svc4proc.c
+++ b/fs/lockd/svc4proc.c
@@ -521,6 +521,7 @@ const struct svc_procedure nlmsvc_procedures4[24] = {
 		.pc_decode = nlm4svc_decode_void,
 		.pc_encode = nlm4svc_encode_void,
 		.pc_argsize = sizeof(struct nlm_void),
+		.pc_argzero = sizeof(struct nlm_void),
 		.pc_ressize = sizeof(struct nlm_void),
 		.pc_xdrressize = St,
 		.pc_name = "NULL",
@@ -530,6 +531,7 @@ const struct svc_procedure nlmsvc_procedures4[24] = {
 		.pc_decode = nlm4svc_decode_testargs,
 		.pc_encode = nlm4svc_encode_testres,
 		.pc_argsize = sizeof(struct nlm_args),
+		.pc_argzero = sizeof(struct nlm_args),
 		.pc_ressize = sizeof(struct nlm_res),
 		.pc_xdrressize = Ck+St+2+No+Rg,
 		.pc_name = "TEST",
@@ -539,6 +541,7 @@ const struct svc_procedure nlmsvc_procedures4[24] = {
 		.pc_decode = nlm4svc_decode_lockargs,
 		.pc_encode = nlm4svc_encode_res,
 		.pc_argsize = sizeof(struct nlm_args),
+		.pc_argzero = sizeof(struct nlm_args),
 		.pc_ressize = sizeof(struct nlm_res),
 		.pc_xdrressize = Ck+St,
 		.pc_name = "LOCK",
@@ -548,6 +551,7 @@ const struct svc_procedure nlmsvc_procedures4[24] = {
 		.pc_decode = nlm4svc_decode_cancargs,
 		.pc_encode = nlm4svc_encode_res,
 		.pc_argsize = sizeof(struct nlm_args),
+		.pc_argzero = sizeof(struct nlm_args),
 		.pc_ressize = sizeof(struct nlm_res),
 		.pc_xdrressize = Ck+St,
 		.pc_name = "CANCEL",
@@ -557,6 +561,7 @@ const struct svc_procedure nlmsvc_procedures4[24] = {
 		.pc_decode = nlm4svc_decode_unlockargs,
 		.pc_encode = nlm4svc_encode_res,
 		.pc_argsize = sizeof(struct nlm_args),
+		.pc_argzero = sizeof(struct nlm_args),
 		.pc_ressize = sizeof(struct nlm_res),
 		.pc_xdrressize = Ck+St,
 		.pc_name = "UNLOCK",
@@ -566,6 +571,7 @@ const struct svc_procedure nlmsvc_procedures4[24] = {
 		.pc_decode = nlm4svc_decode_testargs,
 		.pc_encode = nlm4svc_encode_res,
 		.pc_argsize = sizeof(struct nlm_args),
+		.pc_argzero = sizeof(struct nlm_args),
 		.pc_ressize = sizeof(struct nlm_res),
 		.pc_xdrressize = Ck+St,
 		.pc_name = "GRANTED",
@@ -575,6 +581,7 @@ const struct svc_procedure nlmsvc_procedures4[24] = {
 		.pc_decode = nlm4svc_decode_testargs,
 		.pc_encode = nlm4svc_encode_void,
 		.pc_argsize = sizeof(struct nlm_args),
+		.pc_argzero = sizeof(struct nlm_args),
 		.pc_ressize = sizeof(struct nlm_void),
 		.pc_xdrressize = St,
 		.pc_name = "TEST_MSG",
@@ -584,6 +591,7 @@ const struct svc_procedure nlmsvc_procedures4[24] = {
 		.pc_decode = nlm4svc_decode_lockargs,
 		.pc_encode = nlm4svc_encode_void,
 		.pc_argsize = sizeof(struct nlm_args),
+		.pc_argzero = sizeof(struct nlm_args),
 		.pc_ressize = sizeof(struct nlm_void),
 		.pc_xdrressize = St,
 		.pc_name = "LOCK_MSG",
@@ -593,6 +601,7 @@ const struct svc_procedure nlmsvc_procedures4[24] = {
 		.pc_decode = nlm4svc_decode_cancargs,
 		.pc_encode = nlm4svc_encode_void,
 		.pc_argsize = sizeof(struct nlm_args),
+		.pc_argzero = sizeof(struct nlm_args),
 		.pc_ressize = sizeof(struct nlm_void),
 		.pc_xdrressize = St,
 		.pc_name = "CANCEL_MSG",
@@ -602,6 +611,7 @@ const struct svc_procedure nlmsvc_procedures4[24] = {
 		.pc_decode = nlm4svc_decode_unlockargs,
 		.pc_encode = nlm4svc_encode_void,
 		.pc_argsize = sizeof(struct nlm_args),
+		.pc_argzero = sizeof(struct nlm_args),
 		.pc_ressize = sizeof(struct nlm_void),
 		.pc_xdrressize = St,
 		.pc_name = "UNLOCK_MSG",
@@ -611,6 +621,7 @@ const struct svc_procedure nlmsvc_procedures4[24] = {
 		.pc_decode = nlm4svc_decode_testargs,
 		.pc_encode = nlm4svc_encode_void,
 		.pc_argsize = sizeof(struct nlm_args),
+		.pc_argzero = sizeof(struct nlm_args),
 		.pc_ressize = sizeof(struct nlm_void),
 		.pc_xdrressize = St,
 		.pc_name = "GRANTED_MSG",
@@ -620,6 +631,7 @@ const struct svc_procedure nlmsvc_procedures4[24] = {
 		.pc_decode = nlm4svc_decode_void,
 		.pc_encode = nlm4svc_encode_void,
 		.pc_argsize = sizeof(struct nlm_res),
+		.pc_argzero = sizeof(struct nlm_res),
 		.pc_ressize = sizeof(struct nlm_void),
 		.pc_xdrressize = St,
 		.pc_name = "TEST_RES",
@@ -629,6 +641,7 @@ const struct svc_procedure nlmsvc_procedures4[24] = {
 		.pc_decode = nlm4svc_decode_void,
 		.pc_encode = nlm4svc_encode_void,
 		.pc_argsize = sizeof(struct nlm_res),
+		.pc_argzero = sizeof(struct nlm_res),
 		.pc_ressize = sizeof(struct nlm_void),
 		.pc_xdrressize = St,
 		.pc_name = "LOCK_RES",
@@ -638,6 +651,7 @@ const struct svc_procedure nlmsvc_procedures4[24] = {
 		.pc_decode = nlm4svc_decode_void,
 		.pc_encode = nlm4svc_encode_void,
 		.pc_argsize = sizeof(struct nlm_res),
+		.pc_argzero = sizeof(struct nlm_res),
 		.pc_ressize = sizeof(struct nlm_void),
 		.pc_xdrressize = St,
 		.pc_name = "CANCEL_RES",
@@ -647,6 +661,7 @@ const struct svc_procedure nlmsvc_procedures4[24] = {
 		.pc_decode = nlm4svc_decode_void,
 		.pc_encode = nlm4svc_encode_void,
 		.pc_argsize = sizeof(struct nlm_res),
+		.pc_argzero = sizeof(struct nlm_res),
 		.pc_ressize = sizeof(struct nlm_void),
 		.pc_xdrressize = St,
 		.pc_name = "UNLOCK_RES",
@@ -656,6 +671,7 @@ const struct svc_procedure nlmsvc_procedures4[24] = {
 		.pc_decode = nlm4svc_decode_res,
 		.pc_encode = nlm4svc_encode_void,
 		.pc_argsize = sizeof(struct nlm_res),
+		.pc_argzero = sizeof(struct nlm_res),
 		.pc_ressize = sizeof(struct nlm_void),
 		.pc_xdrressize = St,
 		.pc_name = "GRANTED_RES",
@@ -665,6 +681,7 @@ const struct svc_procedure nlmsvc_procedures4[24] = {
 		.pc_decode = nlm4svc_decode_reboot,
 		.pc_encode = nlm4svc_encode_void,
 		.pc_argsize = sizeof(struct nlm_reboot),
+		.pc_argzero = sizeof(struct nlm_reboot),
 		.pc_ressize = sizeof(struct nlm_void),
 		.pc_xdrressize = St,
 		.pc_name = "SM_NOTIFY",
@@ -674,6 +691,7 @@ const struct svc_procedure nlmsvc_procedures4[24] = {
 		.pc_decode = nlm4svc_decode_void,
 		.pc_encode = nlm4svc_encode_void,
 		.pc_argsize = sizeof(struct nlm_void),
+		.pc_argzero = sizeof(struct nlm_void),
 		.pc_ressize = sizeof(struct nlm_void),
 		.pc_xdrressize = 0,
 		.pc_name = "UNUSED",
@@ -683,6 +701,7 @@ const struct svc_procedure nlmsvc_procedures4[24] = {
 		.pc_decode = nlm4svc_decode_void,
 		.pc_encode = nlm4svc_encode_void,
 		.pc_argsize = sizeof(struct nlm_void),
+		.pc_argzero = sizeof(struct nlm_void),
 		.pc_ressize = sizeof(struct nlm_void),
 		.pc_xdrressize = 0,
 		.pc_name = "UNUSED",
@@ -692,6 +711,7 @@ const struct svc_procedure nlmsvc_procedures4[24] = {
 		.pc_decode = nlm4svc_decode_void,
 		.pc_encode = nlm4svc_encode_void,
 		.pc_argsize = sizeof(struct nlm_void),
+		.pc_argzero = sizeof(struct nlm_void),
 		.pc_ressize = sizeof(struct nlm_void),
 		.pc_xdrressize = 0,
 		.pc_name = "UNUSED",
@@ -701,6 +721,7 @@ const struct svc_procedure nlmsvc_procedures4[24] = {
 		.pc_decode = nlm4svc_decode_shareargs,
 		.pc_encode = nlm4svc_encode_shareres,
 		.pc_argsize = sizeof(struct nlm_args),
+		.pc_argzero = sizeof(struct nlm_args),
 		.pc_ressize = sizeof(struct nlm_res),
 		.pc_xdrressize = Ck+St+1,
 		.pc_name = "SHARE",
@@ -710,6 +731,7 @@ const struct svc_procedure nlmsvc_procedures4[24] = {
 		.pc_decode = nlm4svc_decode_shareargs,
 		.pc_encode = nlm4svc_encode_shareres,
 		.pc_argsize = sizeof(struct nlm_args),
+		.pc_argzero = sizeof(struct nlm_args),
 		.pc_ressize = sizeof(struct nlm_res),
 		.pc_xdrressize = Ck+St+1,
 		.pc_name = "UNSHARE",
@@ -719,6 +741,7 @@ const struct svc_procedure nlmsvc_procedures4[24] = {
 		.pc_decode = nlm4svc_decode_lockargs,
 		.pc_encode = nlm4svc_encode_res,
 		.pc_argsize = sizeof(struct nlm_args),
+		.pc_argzero = sizeof(struct nlm_args),
 		.pc_ressize = sizeof(struct nlm_res),
 		.pc_xdrressize = Ck+St,
 		.pc_name = "NM_LOCK",
@@ -728,6 +751,7 @@ const struct svc_procedure nlmsvc_procedures4[24] = {
 		.pc_decode = nlm4svc_decode_notify,
 		.pc_encode = nlm4svc_encode_void,
 		.pc_argsize = sizeof(struct nlm_args),
+		.pc_argzero = sizeof(struct nlm_args),
 		.pc_ressize = sizeof(struct nlm_void),
 		.pc_xdrressize = St,
 		.pc_name = "FREE_ALL",
diff --git a/fs/lockd/svcproc.c b/fs/lockd/svcproc.c
index b09ca35b527c..e35c05e27806 100644
--- a/fs/lockd/svcproc.c
+++ b/fs/lockd/svcproc.c
@@ -555,6 +555,7 @@ const struct svc_procedure nlmsvc_procedures[24] = {
 		.pc_decode = nlmsvc_decode_void,
 		.pc_encode = nlmsvc_encode_void,
 		.pc_argsize = sizeof(struct nlm_void),
+		.pc_argzero = sizeof(struct nlm_void),
 		.pc_ressize = sizeof(struct nlm_void),
 		.pc_xdrressize = St,
 		.pc_name = "NULL",
@@ -564,6 +565,7 @@ const struct svc_procedure nlmsvc_procedures[24] = {
 		.pc_decode = nlmsvc_decode_testargs,
 		.pc_encode = nlmsvc_encode_testres,
 		.pc_argsize = sizeof(struct nlm_args),
+		.pc_argzero = sizeof(struct nlm_args),
 		.pc_ressize = sizeof(struct nlm_res),
 		.pc_xdrressize = Ck+St+2+No+Rg,
 		.pc_name = "TEST",
@@ -573,6 +575,7 @@ const struct svc_procedure nlmsvc_procedures[24] = {
 		.pc_decode = nlmsvc_decode_lockargs,
 		.pc_encode = nlmsvc_encode_res,
 		.pc_argsize = sizeof(struct nlm_args),
+		.pc_argzero = sizeof(struct nlm_args),
 		.pc_ressize = sizeof(struct nlm_res),
 		.pc_xdrressize = Ck+St,
 		.pc_name = "LOCK",
@@ -582,6 +585,7 @@ const struct svc_procedure nlmsvc_procedures[24] = {
 		.pc_decode = nlmsvc_decode_cancargs,
 		.pc_encode = nlmsvc_encode_res,
 		.pc_argsize = sizeof(struct nlm_args),
+		.pc_argzero = sizeof(struct nlm_args),
 		.pc_ressize = sizeof(struct nlm_res),
 		.pc_xdrressize = Ck+St,
 		.pc_name = "CANCEL",
@@ -591,6 +595,7 @@ const struct svc_procedure nlmsvc_procedures[24] = {
 		.pc_decode = nlmsvc_decode_unlockargs,
 		.pc_encode = nlmsvc_encode_res,
 		.pc_argsize = sizeof(struct nlm_args),
+		.pc_argzero = sizeof(struct nlm_args),
 		.pc_ressize = sizeof(struct nlm_res),
 		.pc_xdrressize = Ck+St,
 		.pc_name = "UNLOCK",
@@ -600,6 +605,7 @@ const struct svc_procedure nlmsvc_procedures[24] = {
 		.pc_decode = nlmsvc_decode_testargs,
 		.pc_encode = nlmsvc_encode_res,
 		.pc_argsize = sizeof(struct nlm_args),
+		.pc_argzero = sizeof(struct nlm_args),
 		.pc_ressize = sizeof(struct nlm_res),
 		.pc_xdrressize = Ck+St,
 		.pc_name = "GRANTED",
@@ -609,6 +615,7 @@ const struct svc_procedure nlmsvc_procedures[24] = {
 		.pc_decode = nlmsvc_decode_testargs,
 		.pc_encode = nlmsvc_encode_void,
 		.pc_argsize = sizeof(struct nlm_args),
+		.pc_argzero = sizeof(struct nlm_args),
 		.pc_ressize = sizeof(struct nlm_void),
 		.pc_xdrressize = St,
 		.pc_name = "TEST_MSG",
@@ -618,6 +625,7 @@ const struct svc_procedure nlmsvc_procedures[24] = {
 		.pc_decode = nlmsvc_decode_lockargs,
 		.pc_encode = nlmsvc_encode_void,
 		.pc_argsize = sizeof(struct nlm_args),
+		.pc_argzero = sizeof(struct nlm_args),
 		.pc_ressize = sizeof(struct nlm_void),
 		.pc_xdrressize = St,
 		.pc_name = "LOCK_MSG",
@@ -627,6 +635,7 @@ const struct svc_procedure nlmsvc_procedures[24] = {
 		.pc_decode = nlmsvc_decode_cancargs,
 		.pc_encode = nlmsvc_encode_void,
 		.pc_argsize = sizeof(struct nlm_args),
+		.pc_argzero = sizeof(struct nlm_args),
 		.pc_ressize = sizeof(struct nlm_void),
 		.pc_xdrressize = St,
 		.pc_name = "CANCEL_MSG",
@@ -636,6 +645,7 @@ const struct svc_procedure nlmsvc_procedures[24] = {
 		.pc_decode = nlmsvc_decode_unlockargs,
 		.pc_encode = nlmsvc_encode_void,
 		.pc_argsize = sizeof(struct nlm_args),
+		.pc_argzero = sizeof(struct nlm_args),
 		.pc_ressize = sizeof(struct nlm_void),
 		.pc_xdrressize = St,
 		.pc_name = "UNLOCK_MSG",
@@ -645,6 +655,7 @@ const struct svc_procedure nlmsvc_procedures[24] = {
 		.pc_decode = nlmsvc_decode_testargs,
 		.pc_encode = nlmsvc_encode_void,
 		.pc_argsize = sizeof(struct nlm_args),
+		.pc_argzero = sizeof(struct nlm_args),
 		.pc_ressize = sizeof(struct nlm_void),
 		.pc_xdrressize = St,
 		.pc_name = "GRANTED_MSG",
@@ -654,6 +665,7 @@ const struct svc_procedure nlmsvc_procedures[24] = {
 		.pc_decode = nlmsvc_decode_void,
 		.pc_encode = nlmsvc_encode_void,
 		.pc_argsize = sizeof(struct nlm_res),
+		.pc_argzero = sizeof(struct nlm_res),
 		.pc_ressize = sizeof(struct nlm_void),
 		.pc_xdrressize = St,
 		.pc_name = "TEST_RES",
@@ -663,6 +675,7 @@ const struct svc_procedure nlmsvc_procedures[24] = {
 		.pc_decode = nlmsvc_decode_void,
 		.pc_encode = nlmsvc_encode_void,
 		.pc_argsize = sizeof(struct nlm_res),
+		.pc_argzero = sizeof(struct nlm_res),
 		.pc_ressize = sizeof(struct nlm_void),
 		.pc_xdrressize = St,
 		.pc_name = "LOCK_RES",
@@ -672,6 +685,7 @@ const struct svc_procedure nlmsvc_procedures[24] = {
 		.pc_decode = nlmsvc_decode_void,
 		.pc_encode = nlmsvc_encode_void,
 		.pc_argsize = sizeof(struct nlm_res),
+		.pc_argzero = sizeof(struct nlm_res),
 		.pc_ressize = sizeof(struct nlm_void),
 		.pc_xdrressize = St,
 		.pc_name = "CANCEL_RES",
@@ -681,6 +695,7 @@ const struct svc_procedure nlmsvc_procedures[24] = {
 		.pc_decode = nlmsvc_decode_void,
 		.pc_encode = nlmsvc_encode_void,
 		.pc_argsize = sizeof(struct nlm_res),
+		.pc_argzero = sizeof(struct nlm_res),
 		.pc_ressize = sizeof(struct nlm_void),
 		.pc_xdrressize = St,
 		.pc_name = "UNLOCK_RES",
@@ -690,6 +705,7 @@ const struct svc_procedure nlmsvc_procedures[24] = {
 		.pc_decode = nlmsvc_decode_res,
 		.pc_encode = nlmsvc_encode_void,
 		.pc_argsize = sizeof(struct nlm_res),
+		.pc_argzero = sizeof(struct nlm_res),
 		.pc_ressize = sizeof(struct nlm_void),
 		.pc_xdrressize = St,
 		.pc_name = "GRANTED_RES",
@@ -699,6 +715,7 @@ const struct svc_procedure nlmsvc_procedures[24] = {
 		.pc_decode = nlmsvc_decode_reboot,
 		.pc_encode = nlmsvc_encode_void,
 		.pc_argsize = sizeof(struct nlm_reboot),
+		.pc_argzero = sizeof(struct nlm_reboot),
 		.pc_ressize = sizeof(struct nlm_void),
 		.pc_xdrressize = St,
 		.pc_name = "SM_NOTIFY",
@@ -708,6 +725,7 @@ const struct svc_procedure nlmsvc_procedures[24] = {
 		.pc_decode = nlmsvc_decode_void,
 		.pc_encode = nlmsvc_encode_void,
 		.pc_argsize = sizeof(struct nlm_void),
+		.pc_argzero = sizeof(struct nlm_void),
 		.pc_ressize = sizeof(struct nlm_void),
 		.pc_xdrressize = St,
 		.pc_name = "UNUSED",
@@ -717,6 +735,7 @@ const struct svc_procedure nlmsvc_procedures[24] = {
 		.pc_decode = nlmsvc_decode_void,
 		.pc_encode = nlmsvc_encode_void,
 		.pc_argsize = sizeof(struct nlm_void),
+		.pc_argzero = sizeof(struct nlm_void),
 		.pc_ressize = sizeof(struct nlm_void),
 		.pc_xdrressize = St,
 		.pc_name = "UNUSED",
@@ -726,6 +745,7 @@ const struct svc_procedure nlmsvc_procedures[24] = {
 		.pc_decode = nlmsvc_decode_void,
 		.pc_encode = nlmsvc_encode_void,
 		.pc_argsize = sizeof(struct nlm_void),
+		.pc_argzero = sizeof(struct nlm_void),
 		.pc_ressize = sizeof(struct nlm_void),
 		.pc_xdrressize = St,
 		.pc_name = "UNUSED",
@@ -735,6 +755,7 @@ const struct svc_procedure nlmsvc_procedures[24] = {
 		.pc_decode = nlmsvc_decode_shareargs,
 		.pc_encode = nlmsvc_encode_shareres,
 		.pc_argsize = sizeof(struct nlm_args),
+		.pc_argzero = sizeof(struct nlm_args),
 		.pc_ressize = sizeof(struct nlm_res),
 		.pc_xdrressize = Ck+St+1,
 		.pc_name = "SHARE",
@@ -744,6 +765,7 @@ const struct svc_procedure nlmsvc_procedures[24] = {
 		.pc_decode = nlmsvc_decode_shareargs,
 		.pc_encode = nlmsvc_encode_shareres,
 		.pc_argsize = sizeof(struct nlm_args),
+		.pc_argzero = sizeof(struct nlm_args),
 		.pc_ressize = sizeof(struct nlm_res),
 		.pc_xdrressize = Ck+St+1,
 		.pc_name = "UNSHARE",
@@ -753,6 +775,7 @@ const struct svc_procedure nlmsvc_procedures[24] = {
 		.pc_decode = nlmsvc_decode_lockargs,
 		.pc_encode = nlmsvc_encode_res,
 		.pc_argsize = sizeof(struct nlm_args),
+		.pc_argzero = sizeof(struct nlm_args),
 		.pc_ressize = sizeof(struct nlm_res),
 		.pc_xdrressize = Ck+St,
 		.pc_name = "NM_LOCK",
@@ -762,6 +785,7 @@ const struct svc_procedure nlmsvc_procedures[24] = {
 		.pc_decode = nlmsvc_decode_notify,
 		.pc_encode = nlmsvc_encode_void,
 		.pc_argsize = sizeof(struct nlm_args),
+		.pc_argzero = sizeof(struct nlm_args),
 		.pc_ressize = sizeof(struct nlm_void),
 		.pc_xdrressize = 0,
 		.pc_name = "FREE_ALL",
diff --git a/fs/nfs/callback_xdr.c b/fs/nfs/callback_xdr.c
index 8dcb08e1a885..d0cccddb7d08 100644
--- a/fs/nfs/callback_xdr.c
+++ b/fs/nfs/callback_xdr.c
@@ -1065,6 +1065,7 @@ static const struct svc_procedure nfs4_callback_procedures1[] = {
 		.pc_func = nfs4_callback_compound,
 		.pc_encode = nfs4_encode_void,
 		.pc_argsize = 256,
+		.pc_argzero = 256,
 		.pc_ressize = 256,
 		.pc_xdrressize = NFS4_CALLBACK_BUFSIZE,
 		.pc_name = "COMPOUND",
diff --git a/fs/nfsd/cache.h b/fs/nfsd/cache.h
index 65c331f75e9c..f21259ead64b 100644
--- a/fs/nfsd/cache.h
+++ b/fs/nfsd/cache.h
@@ -84,6 +84,6 @@ int	nfsd_reply_cache_init(struct nfsd_net *);
 void	nfsd_reply_cache_shutdown(struct nfsd_net *);
 int	nfsd_cache_lookup(struct svc_rqst *);
 void	nfsd_cache_update(struct svc_rqst *, int, __be32 *);
-int	nfsd_reply_cache_stats_open(struct inode *, struct file *);
+int	nfsd_reply_cache_stats_show(struct seq_file *m, void *v);
 
 #endif /* NFSCACHE_H */
diff --git a/fs/nfsd/filecache.c b/fs/nfsd/filecache.c
index eeed4ae5b4ad..d5c57360b418 100644
--- a/fs/nfsd/filecache.c
+++ b/fs/nfsd/filecache.c
@@ -1212,7 +1212,7 @@ nfsd_file_create(struct svc_rqst *rqstp, struct svc_fh *fhp,
  * scraping this file for info should test the labels to ensure they're
  * getting the correct field.
  */
-static int nfsd_file_cache_stats_show(struct seq_file *m, void *v)
+int nfsd_file_cache_stats_show(struct seq_file *m, void *v)
 {
 	unsigned long releases = 0, pages_flushed = 0, evictions = 0;
 	unsigned long hits = 0, acquisitions = 0;
@@ -1259,8 +1259,3 @@ static int nfsd_file_cache_stats_show(struct seq_file *m, void *v)
 	seq_printf(m, "pages flushed: %lu\n", pages_flushed);
 	return 0;
 }
-
-int nfsd_file_cache_stats_open(struct inode *inode, struct file *file)
-{
-	return single_open(file, nfsd_file_cache_stats_show, NULL);
-}
diff --git a/fs/nfsd/filecache.h b/fs/nfsd/filecache.h
index 8e8c0c47d67d..357832bac736 100644
--- a/fs/nfsd/filecache.h
+++ b/fs/nfsd/filecache.h
@@ -60,5 +60,5 @@ __be32 nfsd_file_acquire(struct svc_rqst *rqstp, struct svc_fh *fhp,
 		  unsigned int may_flags, struct nfsd_file **nfp);
 __be32 nfsd_file_create(struct svc_rqst *rqstp, struct svc_fh *fhp,
 		  unsigned int may_flags, struct nfsd_file **nfp);
-int	nfsd_file_cache_stats_open(struct inode *, struct file *);
+int nfsd_file_cache_stats_show(struct seq_file *m, void *v);
 #endif /* _FS_NFSD_FILECACHE_H */
diff --git a/fs/nfsd/netns.h b/fs/nfsd/netns.h
index ffe17743cc74..8c854ba3285b 100644
--- a/fs/nfsd/netns.h
+++ b/fs/nfsd/netns.h
@@ -192,6 +192,10 @@ struct nfsd_net {
 
 	atomic_t		nfs4_client_count;
 	int			nfs4_max_clients;
+
+	atomic_t		nfsd_courtesy_clients;
+	struct shrinker		nfsd_client_shrinker;
+	struct delayed_work	nfsd_shrinker_work;
 };
 
 /* Simple check to find out if a given net was properly initialized */
diff --git a/fs/nfsd/nfs2acl.c b/fs/nfsd/nfs2acl.c
index 9edd3c1a30fb..13e6e6897f6c 100644
--- a/fs/nfsd/nfs2acl.c
+++ b/fs/nfsd/nfs2acl.c
@@ -331,6 +331,7 @@ static const struct svc_procedure nfsd_acl_procedures2[5] = {
 		.pc_decode = nfssvc_decode_voidarg,
 		.pc_encode = nfssvc_encode_voidres,
 		.pc_argsize = sizeof(struct nfsd_voidargs),
+		.pc_argzero = sizeof(struct nfsd_voidargs),
 		.pc_ressize = sizeof(struct nfsd_voidres),
 		.pc_cachetype = RC_NOCACHE,
 		.pc_xdrressize = ST,
@@ -342,6 +343,7 @@ static const struct svc_procedure nfsd_acl_procedures2[5] = {
 		.pc_encode = nfsaclsvc_encode_getaclres,
 		.pc_release = nfsaclsvc_release_getacl,
 		.pc_argsize = sizeof(struct nfsd3_getaclargs),
+		.pc_argzero = sizeof(struct nfsd3_getaclargs),
 		.pc_ressize = sizeof(struct nfsd3_getaclres),
 		.pc_cachetype = RC_NOCACHE,
 		.pc_xdrressize = ST+1+2*(1+ACL),
@@ -353,6 +355,7 @@ static const struct svc_procedure nfsd_acl_procedures2[5] = {
 		.pc_encode = nfssvc_encode_attrstatres,
 		.pc_release = nfssvc_release_attrstat,
 		.pc_argsize = sizeof(struct nfsd3_setaclargs),
+		.pc_argzero = sizeof(struct nfsd3_setaclargs),
 		.pc_ressize = sizeof(struct nfsd_attrstat),
 		.pc_cachetype = RC_NOCACHE,
 		.pc_xdrressize = ST+AT,
@@ -364,6 +367,7 @@ static const struct svc_procedure nfsd_acl_procedures2[5] = {
 		.pc_encode = nfssvc_encode_attrstatres,
 		.pc_release = nfssvc_release_attrstat,
 		.pc_argsize = sizeof(struct nfsd_fhandle),
+		.pc_argzero = sizeof(struct nfsd_fhandle),
 		.pc_ressize = sizeof(struct nfsd_attrstat),
 		.pc_cachetype = RC_NOCACHE,
 		.pc_xdrressize = ST+AT,
@@ -375,6 +379,7 @@ static const struct svc_procedure nfsd_acl_procedures2[5] = {
 		.pc_encode = nfsaclsvc_encode_accessres,
 		.pc_release = nfsaclsvc_release_access,
 		.pc_argsize = sizeof(struct nfsd3_accessargs),
+		.pc_argzero = sizeof(struct nfsd3_accessargs),
 		.pc_ressize = sizeof(struct nfsd3_accessres),
 		.pc_cachetype = RC_NOCACHE,
 		.pc_xdrressize = ST+AT+1,
diff --git a/fs/nfsd/nfs3acl.c b/fs/nfsd/nfs3acl.c
index 9446c6743664..2fb9ee356455 100644
--- a/fs/nfsd/nfs3acl.c
+++ b/fs/nfsd/nfs3acl.c
@@ -252,6 +252,7 @@ static const struct svc_procedure nfsd_acl_procedures3[3] = {
 		.pc_decode = nfssvc_decode_voidarg,
 		.pc_encode = nfssvc_encode_voidres,
 		.pc_argsize = sizeof(struct nfsd_voidargs),
+		.pc_argzero = sizeof(struct nfsd_voidargs),
 		.pc_ressize = sizeof(struct nfsd_voidres),
 		.pc_cachetype = RC_NOCACHE,
 		.pc_xdrressize = ST,
@@ -263,6 +264,7 @@ static const struct svc_procedure nfsd_acl_procedures3[3] = {
 		.pc_encode = nfs3svc_encode_getaclres,
 		.pc_release = nfs3svc_release_getacl,
 		.pc_argsize = sizeof(struct nfsd3_getaclargs),
+		.pc_argzero = sizeof(struct nfsd3_getaclargs),
 		.pc_ressize = sizeof(struct nfsd3_getaclres),
 		.pc_cachetype = RC_NOCACHE,
 		.pc_xdrressize = ST+1+2*(1+ACL),
@@ -274,6 +276,7 @@ static const struct svc_procedure nfsd_acl_procedures3[3] = {
 		.pc_encode = nfs3svc_encode_setaclres,
 		.pc_release = nfs3svc_release_fhandle,
 		.pc_argsize = sizeof(struct nfsd3_setaclargs),
+		.pc_argzero = sizeof(struct nfsd3_setaclargs),
 		.pc_ressize = sizeof(struct nfsd3_attrstat),
 		.pc_cachetype = RC_NOCACHE,
 		.pc_xdrressize = ST+pAT,
diff --git a/fs/nfsd/nfs3proc.c b/fs/nfsd/nfs3proc.c
index a41cca619338..923d9a80df92 100644
--- a/fs/nfsd/nfs3proc.c
+++ b/fs/nfsd/nfs3proc.c
@@ -150,7 +150,6 @@ nfsd3_proc_read(struct svc_rqst *rqstp)
 {
 	struct nfsd3_readargs *argp = rqstp->rq_argp;
 	struct nfsd3_readres *resp = rqstp->rq_resp;
-	u32 max_blocksize = svc_max_payload(rqstp);
 	unsigned int len;
 	int v;
 
@@ -159,7 +158,8 @@ nfsd3_proc_read(struct svc_rqst *rqstp)
 				(unsigned long) argp->count,
 				(unsigned long long) argp->offset);
 
-	argp->count = min_t(u32, argp->count, max_blocksize);
+	argp->count = min_t(u32, argp->count, svc_max_payload(rqstp));
+	argp->count = min_t(u32, argp->count, rqstp->rq_res.buflen);
 	if (argp->offset > (u64)OFFSET_MAX)
 		argp->offset = (u64)OFFSET_MAX;
 	if (argp->offset + argp->count > (u64)OFFSET_MAX)
@@ -563,25 +563,18 @@ static void nfsd3_init_dirlist_pages(struct svc_rqst *rqstp,
 {
 	struct xdr_buf *buf = &resp->dirlist;
 	struct xdr_stream *xdr = &resp->xdr;
-
-	count = clamp(count, (u32)(XDR_UNIT * 2), svc_max_payload(rqstp));
+	unsigned int sendbuf = min_t(unsigned int, rqstp->rq_res.buflen,
+				     svc_max_payload(rqstp));
 
 	memset(buf, 0, sizeof(*buf));
 
 	/* Reserve room for the NULL ptr & eof flag (-2 words) */
-	buf->buflen = count - XDR_UNIT * 2;
+	buf->buflen = clamp(count, (u32)(XDR_UNIT * 2), sendbuf);
+	buf->buflen -= XDR_UNIT * 2;
 	buf->pages = rqstp->rq_next_page;
 	rqstp->rq_next_page += (buf->buflen + PAGE_SIZE - 1) >> PAGE_SHIFT;
 
-	/* This is xdr_init_encode(), but it assumes that
-	 * the head kvec has already been consumed. */
-	xdr_set_scratch_buffer(xdr, NULL, 0);
-	xdr->buf = buf;
-	xdr->page_ptr = buf->pages;
-	xdr->iov = NULL;
-	xdr->p = page_address(*buf->pages);
-	xdr->end = (void *)xdr->p + min_t(u32, buf->buflen, PAGE_SIZE);
-	xdr->rqst = NULL;
+	xdr_init_encode_pages(xdr, buf, buf->pages,  NULL);
 }
 
 /*
@@ -808,6 +801,7 @@ static const struct svc_procedure nfsd_procedures3[22] = {
 		.pc_decode = nfssvc_decode_voidarg,
 		.pc_encode = nfssvc_encode_voidres,
 		.pc_argsize = sizeof(struct nfsd_voidargs),
+		.pc_argzero = sizeof(struct nfsd_voidargs),
 		.pc_ressize = sizeof(struct nfsd_voidres),
 		.pc_cachetype = RC_NOCACHE,
 		.pc_xdrressize = ST,
@@ -819,6 +813,7 @@ static const struct svc_procedure nfsd_procedures3[22] = {
 		.pc_encode = nfs3svc_encode_getattrres,
 		.pc_release = nfs3svc_release_fhandle,
 		.pc_argsize = sizeof(struct nfsd_fhandle),
+		.pc_argzero = sizeof(struct nfsd_fhandle),
 		.pc_ressize = sizeof(struct nfsd3_attrstatres),
 		.pc_cachetype = RC_NOCACHE,
 		.pc_xdrressize = ST+AT,
@@ -830,6 +825,7 @@ static const struct svc_procedure nfsd_procedures3[22] = {
 		.pc_encode = nfs3svc_encode_wccstatres,
 		.pc_release = nfs3svc_release_fhandle,
 		.pc_argsize = sizeof(struct nfsd3_sattrargs),
+		.pc_argzero = sizeof(struct nfsd3_sattrargs),
 		.pc_ressize = sizeof(struct nfsd3_wccstatres),
 		.pc_cachetype = RC_REPLBUFF,
 		.pc_xdrressize = ST+WC,
@@ -841,6 +837,7 @@ static const struct svc_procedure nfsd_procedures3[22] = {
 		.pc_encode = nfs3svc_encode_lookupres,
 		.pc_release = nfs3svc_release_fhandle2,
 		.pc_argsize = sizeof(struct nfsd3_diropargs),
+		.pc_argzero = sizeof(struct nfsd3_diropargs),
 		.pc_ressize = sizeof(struct nfsd3_diropres),
 		.pc_cachetype = RC_NOCACHE,
 		.pc_xdrressize = ST+FH+pAT+pAT,
@@ -852,6 +849,7 @@ static const struct svc_procedure nfsd_procedures3[22] = {
 		.pc_encode = nfs3svc_encode_accessres,
 		.pc_release = nfs3svc_release_fhandle,
 		.pc_argsize = sizeof(struct nfsd3_accessargs),
+		.pc_argzero = sizeof(struct nfsd3_accessargs),
 		.pc_ressize = sizeof(struct nfsd3_accessres),
 		.pc_cachetype = RC_NOCACHE,
 		.pc_xdrressize = ST+pAT+1,
@@ -863,6 +861,7 @@ static const struct svc_procedure nfsd_procedures3[22] = {
 		.pc_encode = nfs3svc_encode_readlinkres,
 		.pc_release = nfs3svc_release_fhandle,
 		.pc_argsize = sizeof(struct nfsd_fhandle),
+		.pc_argzero = sizeof(struct nfsd_fhandle),
 		.pc_ressize = sizeof(struct nfsd3_readlinkres),
 		.pc_cachetype = RC_NOCACHE,
 		.pc_xdrressize = ST+pAT+1+NFS3_MAXPATHLEN/4,
@@ -874,6 +873,7 @@ static const struct svc_procedure nfsd_procedures3[22] = {
 		.pc_encode = nfs3svc_encode_readres,
 		.pc_release = nfs3svc_release_fhandle,
 		.pc_argsize = sizeof(struct nfsd3_readargs),
+		.pc_argzero = sizeof(struct nfsd3_readargs),
 		.pc_ressize = sizeof(struct nfsd3_readres),
 		.pc_cachetype = RC_NOCACHE,
 		.pc_xdrressize = ST+pAT+4+NFSSVC_MAXBLKSIZE/4,
@@ -885,6 +885,7 @@ static const struct svc_procedure nfsd_procedures3[22] = {
 		.pc_encode = nfs3svc_encode_writeres,
 		.pc_release = nfs3svc_release_fhandle,
 		.pc_argsize = sizeof(struct nfsd3_writeargs),
+		.pc_argzero = sizeof(struct nfsd3_writeargs),
 		.pc_ressize = sizeof(struct nfsd3_writeres),
 		.pc_cachetype = RC_REPLBUFF,
 		.pc_xdrressize = ST+WC+4,
@@ -896,6 +897,7 @@ static const struct svc_procedure nfsd_procedures3[22] = {
 		.pc_encode = nfs3svc_encode_createres,
 		.pc_release = nfs3svc_release_fhandle2,
 		.pc_argsize = sizeof(struct nfsd3_createargs),
+		.pc_argzero = sizeof(struct nfsd3_createargs),
 		.pc_ressize = sizeof(struct nfsd3_createres),
 		.pc_cachetype = RC_REPLBUFF,
 		.pc_xdrressize = ST+(1+FH+pAT)+WC,
@@ -907,6 +909,7 @@ static const struct svc_procedure nfsd_procedures3[22] = {
 		.pc_encode = nfs3svc_encode_createres,
 		.pc_release = nfs3svc_release_fhandle2,
 		.pc_argsize = sizeof(struct nfsd3_mkdirargs),
+		.pc_argzero = sizeof(struct nfsd3_mkdirargs),
 		.pc_ressize = sizeof(struct nfsd3_createres),
 		.pc_cachetype = RC_REPLBUFF,
 		.pc_xdrressize = ST+(1+FH+pAT)+WC,
@@ -918,6 +921,7 @@ static const struct svc_procedure nfsd_procedures3[22] = {
 		.pc_encode = nfs3svc_encode_createres,
 		.pc_release = nfs3svc_release_fhandle2,
 		.pc_argsize = sizeof(struct nfsd3_symlinkargs),
+		.pc_argzero = sizeof(struct nfsd3_symlinkargs),
 		.pc_ressize = sizeof(struct nfsd3_createres),
 		.pc_cachetype = RC_REPLBUFF,
 		.pc_xdrressize = ST+(1+FH+pAT)+WC,
@@ -929,6 +933,7 @@ static const struct svc_procedure nfsd_procedures3[22] = {
 		.pc_encode = nfs3svc_encode_createres,
 		.pc_release = nfs3svc_release_fhandle2,
 		.pc_argsize = sizeof(struct nfsd3_mknodargs),
+		.pc_argzero = sizeof(struct nfsd3_mknodargs),
 		.pc_ressize = sizeof(struct nfsd3_createres),
 		.pc_cachetype = RC_REPLBUFF,
 		.pc_xdrressize = ST+(1+FH+pAT)+WC,
@@ -940,6 +945,7 @@ static const struct svc_procedure nfsd_procedures3[22] = {
 		.pc_encode = nfs3svc_encode_wccstatres,
 		.pc_release = nfs3svc_release_fhandle,
 		.pc_argsize = sizeof(struct nfsd3_diropargs),
+		.pc_argzero = sizeof(struct nfsd3_diropargs),
 		.pc_ressize = sizeof(struct nfsd3_wccstatres),
 		.pc_cachetype = RC_REPLBUFF,
 		.pc_xdrressize = ST+WC,
@@ -951,6 +957,7 @@ static const struct svc_procedure nfsd_procedures3[22] = {
 		.pc_encode = nfs3svc_encode_wccstatres,
 		.pc_release = nfs3svc_release_fhandle,
 		.pc_argsize = sizeof(struct nfsd3_diropargs),
+		.pc_argzero = sizeof(struct nfsd3_diropargs),
 		.pc_ressize = sizeof(struct nfsd3_wccstatres),
 		.pc_cachetype = RC_REPLBUFF,
 		.pc_xdrressize = ST+WC,
@@ -962,6 +969,7 @@ static const struct svc_procedure nfsd_procedures3[22] = {
 		.pc_encode = nfs3svc_encode_renameres,
 		.pc_release = nfs3svc_release_fhandle2,
 		.pc_argsize = sizeof(struct nfsd3_renameargs),
+		.pc_argzero = sizeof(struct nfsd3_renameargs),
 		.pc_ressize = sizeof(struct nfsd3_renameres),
 		.pc_cachetype = RC_REPLBUFF,
 		.pc_xdrressize = ST+WC+WC,
@@ -973,6 +981,7 @@ static const struct svc_procedure nfsd_procedures3[22] = {
 		.pc_encode = nfs3svc_encode_linkres,
 		.pc_release = nfs3svc_release_fhandle2,
 		.pc_argsize = sizeof(struct nfsd3_linkargs),
+		.pc_argzero = sizeof(struct nfsd3_linkargs),
 		.pc_ressize = sizeof(struct nfsd3_linkres),
 		.pc_cachetype = RC_REPLBUFF,
 		.pc_xdrressize = ST+pAT+WC,
@@ -984,6 +993,7 @@ static const struct svc_procedure nfsd_procedures3[22] = {
 		.pc_encode = nfs3svc_encode_readdirres,
 		.pc_release = nfs3svc_release_fhandle,
 		.pc_argsize = sizeof(struct nfsd3_readdirargs),
+		.pc_argzero = sizeof(struct nfsd3_readdirargs),
 		.pc_ressize = sizeof(struct nfsd3_readdirres),
 		.pc_cachetype = RC_NOCACHE,
 		.pc_name = "READDIR",
@@ -994,6 +1004,7 @@ static const struct svc_procedure nfsd_procedures3[22] = {
 		.pc_encode = nfs3svc_encode_readdirres,
 		.pc_release = nfs3svc_release_fhandle,
 		.pc_argsize = sizeof(struct nfsd3_readdirplusargs),
+		.pc_argzero = sizeof(struct nfsd3_readdirplusargs),
 		.pc_ressize = sizeof(struct nfsd3_readdirres),
 		.pc_cachetype = RC_NOCACHE,
 		.pc_name = "READDIRPLUS",
@@ -1003,6 +1014,7 @@ static const struct svc_procedure nfsd_procedures3[22] = {
 		.pc_decode = nfs3svc_decode_fhandleargs,
 		.pc_encode = nfs3svc_encode_fsstatres,
 		.pc_argsize = sizeof(struct nfsd3_fhandleargs),
+		.pc_argzero = sizeof(struct nfsd3_fhandleargs),
 		.pc_ressize = sizeof(struct nfsd3_fsstatres),
 		.pc_cachetype = RC_NOCACHE,
 		.pc_xdrressize = ST+pAT+2*6+1,
@@ -1013,6 +1025,7 @@ static const struct svc_procedure nfsd_procedures3[22] = {
 		.pc_decode = nfs3svc_decode_fhandleargs,
 		.pc_encode = nfs3svc_encode_fsinfores,
 		.pc_argsize = sizeof(struct nfsd3_fhandleargs),
+		.pc_argzero = sizeof(struct nfsd3_fhandleargs),
 		.pc_ressize = sizeof(struct nfsd3_fsinfores),
 		.pc_cachetype = RC_NOCACHE,
 		.pc_xdrressize = ST+pAT+12,
@@ -1023,6 +1036,7 @@ static const struct svc_procedure nfsd_procedures3[22] = {
 		.pc_decode = nfs3svc_decode_fhandleargs,
 		.pc_encode = nfs3svc_encode_pathconfres,
 		.pc_argsize = sizeof(struct nfsd3_fhandleargs),
+		.pc_argzero = sizeof(struct nfsd3_fhandleargs),
 		.pc_ressize = sizeof(struct nfsd3_pathconfres),
 		.pc_cachetype = RC_NOCACHE,
 		.pc_xdrressize = ST+pAT+6,
@@ -1034,6 +1048,7 @@ static const struct svc_procedure nfsd_procedures3[22] = {
 		.pc_encode = nfs3svc_encode_commitres,
 		.pc_release = nfs3svc_release_fhandle,
 		.pc_argsize = sizeof(struct nfsd3_commitargs),
+		.pc_argzero = sizeof(struct nfsd3_commitargs),
 		.pc_ressize = sizeof(struct nfsd3_commitres),
 		.pc_cachetype = RC_NOCACHE,
 		.pc_xdrressize = ST+WC+2,
diff --git a/fs/nfsd/nfs3xdr.c b/fs/nfsd/nfs3xdr.c
index 0293b8d65f10..3308dd671ef0 100644
--- a/fs/nfsd/nfs3xdr.c
+++ b/fs/nfsd/nfs3xdr.c
@@ -571,10 +571,8 @@ nfs3svc_decode_writeargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
 		args->count = max_blocksize;
 		args->len = max_blocksize;
 	}
-	if (!xdr_stream_subsegment(xdr, &args->payload, args->count))
-		return false;
 
-	return true;
+	return xdr_stream_subsegment(xdr, &args->payload, args->count);
 }
 
 bool
@@ -616,8 +614,6 @@ nfs3svc_decode_symlinkargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
 {
 	struct nfsd3_symlinkargs *args = rqstp->rq_argp;
 	struct kvec *head = rqstp->rq_arg.head;
-	struct kvec *tail = rqstp->rq_arg.tail;
-	size_t remaining;
 
 	if (!svcxdr_decode_diropargs3(xdr, &args->ffh, &args->fname, &args->flen))
 		return false;
@@ -626,16 +622,10 @@ nfs3svc_decode_symlinkargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
 	if (xdr_stream_decode_u32(xdr, &args->tlen) < 0)
 		return false;
 
-	/* request sanity */
-	remaining = head->iov_len + rqstp->rq_arg.page_len + tail->iov_len;
-	remaining -= xdr_stream_pos(xdr);
-	if (remaining < xdr_align_size(args->tlen))
-		return false;
-
-	args->first.iov_base = xdr->p;
+	/* symlink_data */
 	args->first.iov_len = head->iov_len - xdr_stream_pos(xdr);
-
-	return true;
+	args->first.iov_base = xdr_inline_decode(xdr, args->tlen);
+	return args->first.iov_base != NULL;
 }
 
 bool
diff --git a/fs/nfsd/nfs4callback.c b/fs/nfsd/nfs4callback.c
index 4ce328209f61..f0e69edf5f0f 100644
--- a/fs/nfsd/nfs4callback.c
+++ b/fs/nfsd/nfs4callback.c
@@ -1371,11 +1371,21 @@ void nfsd4_init_cb(struct nfsd4_callback *cb, struct nfs4_client *clp,
 	cb->cb_holds_slot = false;
 }
 
-void nfsd4_run_cb(struct nfsd4_callback *cb)
+/**
+ * nfsd4_run_cb - queue up a callback job to run
+ * @cb: callback to queue
+ *
+ * Kick off a callback to do its thing. Returns false if it was already
+ * on a queue, true otherwise.
+ */
+bool nfsd4_run_cb(struct nfsd4_callback *cb)
 {
 	struct nfs4_client *clp = cb->cb_clp;
+	bool queued;
 
 	nfsd41_cb_inflight_begin(clp);
-	if (!nfsd4_queue_cb(cb))
+	queued = nfsd4_queue_cb(cb);
+	if (!queued)
 		nfsd41_cb_inflight_end(clp);
+	return queued;
 }
diff --git a/fs/nfsd/nfs4idmap.c b/fs/nfsd/nfs4idmap.c
index f92161ce1f97..e70a1a2999b7 100644
--- a/fs/nfsd/nfs4idmap.c
+++ b/fs/nfsd/nfs4idmap.c
@@ -82,8 +82,8 @@ ent_init(struct cache_head *cnew, struct cache_head *citm)
 	new->id = itm->id;
 	new->type = itm->type;
 
-	strlcpy(new->name, itm->name, sizeof(new->name));
-	strlcpy(new->authname, itm->authname, sizeof(new->authname));
+	strscpy(new->name, itm->name, sizeof(new->name));
+	strscpy(new->authname, itm->authname, sizeof(new->authname));
 }
 
 static void
@@ -548,7 +548,7 @@ idmap_name_to_id(struct svc_rqst *rqstp, int type, const char *name, u32 namelen
 		return nfserr_badowner;
 	memcpy(key.name, name, namelen);
 	key.name[namelen] = '\0';
-	strlcpy(key.authname, rqst_authname(rqstp), sizeof(key.authname));
+	strscpy(key.authname, rqst_authname(rqstp), sizeof(key.authname));
 	ret = idmap_lookup(rqstp, nametoid_lookup, &key, nn->nametoid_cache, &item);
 	if (ret == -ENOENT)
 		return nfserr_badowner;
@@ -584,7 +584,7 @@ static __be32 idmap_id_to_name(struct xdr_stream *xdr,
 	int ret;
 	struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
 
-	strlcpy(key.authname, rqst_authname(rqstp), sizeof(key.authname));
+	strscpy(key.authname, rqst_authname(rqstp), sizeof(key.authname));
 	ret = idmap_lookup(rqstp, idtoname_lookup, &key, nn->idtoname_cache, &item);
 	if (ret == -ENOENT)
 		return encode_ascii_id(xdr, id);
diff --git a/fs/nfsd/nfs4layouts.c b/fs/nfsd/nfs4layouts.c
index 2c05692a9abf..3564d1c6f610 100644
--- a/fs/nfsd/nfs4layouts.c
+++ b/fs/nfsd/nfs4layouts.c
@@ -658,7 +658,7 @@ nfsd4_cb_layout_done(struct nfsd4_callback *cb, struct rpc_task *task)
 	ktime_t now, cutoff;
 	const struct nfsd4_layout_ops *ops;
 
-
+	trace_nfsd_cb_layout_done(&ls->ls_stid.sc_stateid, task);
 	switch (task->tk_status) {
 	case 0:
 	case -NFS4ERR_DELAY:
diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c
index a72ab97f77ef..8beb2bc4c328 100644
--- a/fs/nfsd/nfs4proc.c
+++ b/fs/nfsd/nfs4proc.c
@@ -141,7 +141,6 @@ fh_dup2(struct svc_fh *dst, struct svc_fh *src)
 static __be32
 do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode)
 {
-	__be32 status;
 
 	if (open->op_truncate &&
 		!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
@@ -156,9 +155,7 @@ do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfs
 	if (open->op_share_deny & NFS4_SHARE_DENY_READ)
 		accmode |= NFSD_MAY_WRITE;
 
-	status = fh_verify(rqstp, current_fh, S_IFREG, accmode);
-
-	return status;
+	return fh_verify(rqstp, current_fh, S_IFREG, accmode);
 }
 
 static __be32 nfsd_check_obj_isreg(struct svc_fh *fh)
@@ -454,7 +451,6 @@ static __be32
 do_open_fhandle(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
 {
 	struct svc_fh *current_fh = &cstate->current_fh;
-	__be32 status;
 	int accmode = 0;
 
 	/* We don't know the target directory, and therefore can not
@@ -479,9 +475,7 @@ do_open_fhandle(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, str
 	if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH)
 		accmode = NFSD_MAY_OWNER_OVERRIDE;
 
-	status = do_open_permission(rqstp, current_fh, open, accmode);
-
-	return status;
+	return do_open_permission(rqstp, current_fh, open, accmode);
 }
 
 static void
@@ -668,11 +662,9 @@ static __be32
 nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 		union nfsd4_op_u *u)
 {
-	__be32 status;
-
 	fh_put(&cstate->current_fh);
-	status = exp_pseudoroot(rqstp, &cstate->current_fh);
-	return status;
+
+	return exp_pseudoroot(rqstp, &cstate->current_fh);
 }
 
 static __be32
@@ -1343,7 +1335,7 @@ try_again:
 		return 0;
 	}
 	if (work) {
-		strlcpy(work->nsui_ipaddr, ipaddr, sizeof(work->nsui_ipaddr) - 1);
+		strscpy(work->nsui_ipaddr, ipaddr, sizeof(work->nsui_ipaddr) - 1);
 		refcount_set(&work->nsui_refcnt, 2);
 		work->nsui_busy = true;
 		list_add_tail(&work->nsui_list, &nn->nfsd_ssc_mount_list);
@@ -1621,6 +1613,10 @@ static void nfsd4_cb_offload_release(struct nfsd4_callback *cb)
 static int nfsd4_cb_offload_done(struct nfsd4_callback *cb,
 				 struct rpc_task *task)
 {
+	struct nfsd4_cb_offload *cbo =
+		container_of(cb, struct nfsd4_cb_offload, co_cb);
+
+	trace_nfsd_cb_offload_done(&cbo->co_res.cb_stateid, task);
 	return 1;
 }
 
@@ -1768,7 +1764,13 @@ static int nfsd4_do_async_copy(void *data)
 		filp = nfs42_ssc_open(copy->ss_mnt, &copy->c_fh,
 				      &copy->stateid);
 		if (IS_ERR(filp)) {
-			nfserr = nfserr_offload_denied;
+			switch (PTR_ERR(filp)) {
+			case -EBADF:
+				nfserr = nfserr_wrong_type;
+				break;
+			default:
+				nfserr = nfserr_offload_denied;
+			}
 			nfsd4_interssc_disconnect(copy->ss_mnt);
 			goto do_callback;
 		}
@@ -1826,7 +1828,7 @@ nfsd4_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 		if (!nfs4_init_copy_state(nn, copy))
 			goto out_err;
 		refcount_set(&async_copy->refcount, 1);
-		memcpy(&copy->cp_res.cb_stateid, &copy->cp_stateid.stid,
+		memcpy(&copy->cp_res.cb_stateid, &copy->cp_stateid.cs_stid,
 			sizeof(copy->cp_res.cb_stateid));
 		dup_copy_fields(copy, async_copy);
 		async_copy->copy_task = kthread_create(nfsd4_do_async_copy,
@@ -1862,7 +1864,7 @@ find_async_copy(struct nfs4_client *clp, stateid_t *stateid)
 
 	spin_lock(&clp->async_lock);
 	list_for_each_entry(copy, &clp->async_copies, copies) {
-		if (memcmp(&copy->cp_stateid.stid, stateid, NFS4_STATEID_SIZE))
+		if (memcmp(&copy->cp_stateid.cs_stid, stateid, NFS4_STATEID_SIZE))
 			continue;
 		refcount_inc(&copy->refcount);
 		spin_unlock(&clp->async_lock);
@@ -1916,7 +1918,7 @@ nfsd4_copy_notify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 	cps = nfs4_alloc_init_cpntf_state(nn, stid);
 	if (!cps)
 		goto out;
-	memcpy(&cn->cpn_cnr_stateid, &cps->cp_stateid.stid, sizeof(stateid_t));
+	memcpy(&cn->cpn_cnr_stateid, &cps->cp_stateid.cs_stid, sizeof(stateid_t));
 	memcpy(&cps->cp_p_stateid, &stid->sc_stateid, sizeof(stateid_t));
 	memcpy(&cps->cp_p_clid, &clp->cl_clientid, sizeof(clientid_t));
 
@@ -2633,9 +2635,6 @@ nfsd4_proc_compound(struct svc_rqst *rqstp)
 	status = nfserr_minor_vers_mismatch;
 	if (nfsd_minorversion(nn, args->minorversion, NFSD_TEST) <= 0)
 		goto out;
-	status = nfserr_resource;
-	if (args->opcnt > NFSD_MAX_OPS_PER_COMPOUND)
-		goto out;
 
 	status = nfs41_check_op_ordering(args);
 	if (status) {
@@ -2648,10 +2647,20 @@ nfsd4_proc_compound(struct svc_rqst *rqstp)
 
 	rqstp->rq_lease_breaker = (void **)&cstate->clp;
 
-	trace_nfsd_compound(rqstp, args->opcnt);
+	trace_nfsd_compound(rqstp, args->tag, args->taglen, args->client_opcnt);
 	while (!status && resp->opcnt < args->opcnt) {
 		op = &args->ops[resp->opcnt++];
 
+		if (unlikely(resp->opcnt == NFSD_MAX_OPS_PER_COMPOUND)) {
+			/* If there are still more operations to process,
+			 * stop here and report NFS4ERR_RESOURCE. */
+			if (cstate->minorversion == 0 &&
+			    args->client_opcnt > resp->opcnt) {
+				op->status = nfserr_resource;
+				goto encode_op;
+			}
+		}
+
 		/*
 		 * The XDR decode routines may have pre-set op->status;
 		 * for example, if there is a miscellaneous XDR error
@@ -2727,8 +2736,8 @@ encode_op:
 			status = op->status;
 		}
 
-		trace_nfsd_compound_status(args->opcnt, resp->opcnt, status,
-					   nfsd4_op_name(op->opnum));
+		trace_nfsd_compound_status(args->client_opcnt, resp->opcnt,
+					   status, nfsd4_op_name(op->opnum));
 
 		nfsd4_cstate_clear_replay(cstate);
 		nfsd4_increment_op_stats(op->opnum);
@@ -2762,28 +2771,49 @@ out:
 
 #define op_encode_channel_attrs_maxsz	(6 + 1 + 1)
 
-static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
+/*
+ * The _rsize() helpers are invoked by the NFSv4 COMPOUND decoder, which
+ * is called before sunrpc sets rq_res.buflen. Thus we have to compute
+ * the maximum payload size here, based on transport limits and the size
+ * of the remaining space in the rq_pages array.
+ */
+static u32 nfsd4_max_payload(const struct svc_rqst *rqstp)
+{
+	u32 buflen;
+
+	buflen = (rqstp->rq_page_end - rqstp->rq_next_page) * PAGE_SIZE;
+	buflen -= rqstp->rq_auth_slack;
+	buflen -= rqstp->rq_res.head[0].iov_len;
+	return min_t(u32, buflen, svc_max_payload(rqstp));
+}
+
+static u32 nfsd4_only_status_rsize(const struct svc_rqst *rqstp,
+				   const struct nfsd4_op *op)
 {
 	return (op_encode_hdr_size) * sizeof(__be32);
 }
 
-static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
+static u32 nfsd4_status_stateid_rsize(const struct svc_rqst *rqstp,
+				      const struct nfsd4_op *op)
 {
 	return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32);
 }
 
-static inline u32 nfsd4_access_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
+static u32 nfsd4_access_rsize(const struct svc_rqst *rqstp,
+			      const struct nfsd4_op *op)
 {
 	/* ac_supported, ac_resp_access */
 	return (op_encode_hdr_size + 2)* sizeof(__be32);
 }
 
-static inline u32 nfsd4_commit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
+static u32 nfsd4_commit_rsize(const struct svc_rqst *rqstp,
+			      const struct nfsd4_op *op)
 {
 	return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32);
 }
 
-static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
+static u32 nfsd4_create_rsize(const struct svc_rqst *rqstp,
+			      const struct nfsd4_op *op)
 {
 	return (op_encode_hdr_size + op_encode_change_info_maxsz
 		+ nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
@@ -2794,17 +2824,17 @@ static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op
  * the op prematurely if the estimate is too large.  We may turn off splice
  * reads unnecessarily.
  */
-static inline u32 nfsd4_getattr_rsize(struct svc_rqst *rqstp,
-				      struct nfsd4_op *op)
+static u32 nfsd4_getattr_rsize(const struct svc_rqst *rqstp,
+			       const struct nfsd4_op *op)
 {
-	u32 *bmap = op->u.getattr.ga_bmval;
+	const u32 *bmap = op->u.getattr.ga_bmval;
 	u32 bmap0 = bmap[0], bmap1 = bmap[1], bmap2 = bmap[2];
 	u32 ret = 0;
 
 	if (bmap0 & FATTR4_WORD0_ACL)
-		return svc_max_payload(rqstp);
+		return nfsd4_max_payload(rqstp);
 	if (bmap0 & FATTR4_WORD0_FS_LOCATIONS)
-		return svc_max_payload(rqstp);
+		return nfsd4_max_payload(rqstp);
 
 	if (bmap1 & FATTR4_WORD1_OWNER) {
 		ret += IDMAP_NAMESZ + 4;
@@ -2832,24 +2862,28 @@ static inline u32 nfsd4_getattr_rsize(struct svc_rqst *rqstp,
 	return ret;
 }
 
-static inline u32 nfsd4_getfh_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
+static u32 nfsd4_getfh_rsize(const struct svc_rqst *rqstp,
+			     const struct nfsd4_op *op)
 {
 	return (op_encode_hdr_size + 1) * sizeof(__be32) + NFS4_FHSIZE;
 }
 
-static inline u32 nfsd4_link_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
+static u32 nfsd4_link_rsize(const struct svc_rqst *rqstp,
+			    const struct nfsd4_op *op)
 {
 	return (op_encode_hdr_size + op_encode_change_info_maxsz)
 		* sizeof(__be32);
 }
 
-static inline u32 nfsd4_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
+static u32 nfsd4_lock_rsize(const struct svc_rqst *rqstp,
+			    const struct nfsd4_op *op)
 {
 	return (op_encode_hdr_size + op_encode_lock_denied_maxsz)
 		* sizeof(__be32);
 }
 
-static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
+static u32 nfsd4_open_rsize(const struct svc_rqst *rqstp,
+			    const struct nfsd4_op *op)
 {
 	return (op_encode_hdr_size + op_encode_stateid_maxsz
 		+ op_encode_change_info_maxsz + 1
@@ -2857,20 +2891,18 @@ static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
 		+ op_encode_delegation_maxsz) * sizeof(__be32);
 }
 
-static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
+static u32 nfsd4_read_rsize(const struct svc_rqst *rqstp,
+			    const struct nfsd4_op *op)
 {
-	u32 maxcount = 0, rlen = 0;
-
-	maxcount = svc_max_payload(rqstp);
-	rlen = min(op->u.read.rd_length, maxcount);
+	u32 rlen = min(op->u.read.rd_length, nfsd4_max_payload(rqstp));
 
 	return (op_encode_hdr_size + 2 + XDR_QUADLEN(rlen)) * sizeof(__be32);
 }
 
-static inline u32 nfsd4_read_plus_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
+static u32 nfsd4_read_plus_rsize(const struct svc_rqst *rqstp,
+				 const struct nfsd4_op *op)
 {
-	u32 maxcount = svc_max_payload(rqstp);
-	u32 rlen = min(op->u.read.rd_length, maxcount);
+	u32 rlen = min(op->u.read.rd_length, nfsd4_max_payload(rqstp));
 	/*
 	 * If we detect that the file changed during hole encoding, then we
 	 * recover by encoding the remaining reply as data. This means we need
@@ -2881,70 +2913,77 @@ static inline u32 nfsd4_read_plus_rsize(struct svc_rqst *rqstp, struct nfsd4_op
 	return (op_encode_hdr_size + 2 + seg_len + XDR_QUADLEN(rlen)) * sizeof(__be32);
 }
 
-static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
+static u32 nfsd4_readdir_rsize(const struct svc_rqst *rqstp,
+			       const struct nfsd4_op *op)
 {
-	u32 maxcount = 0, rlen = 0;
-
-	maxcount = svc_max_payload(rqstp);
-	rlen = min(op->u.readdir.rd_maxcount, maxcount);
+	u32 rlen = min(op->u.readdir.rd_maxcount, nfsd4_max_payload(rqstp));
 
 	return (op_encode_hdr_size + op_encode_verifier_maxsz +
 		XDR_QUADLEN(rlen)) * sizeof(__be32);
 }
 
-static inline u32 nfsd4_readlink_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
+static u32 nfsd4_readlink_rsize(const struct svc_rqst *rqstp,
+				const struct nfsd4_op *op)
 {
 	return (op_encode_hdr_size + 1) * sizeof(__be32) + PAGE_SIZE;
 }
 
-static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
+static u32 nfsd4_remove_rsize(const struct svc_rqst *rqstp,
+			      const struct nfsd4_op *op)
 {
 	return (op_encode_hdr_size + op_encode_change_info_maxsz)
 		* sizeof(__be32);
 }
 
-static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
+static u32 nfsd4_rename_rsize(const struct svc_rqst *rqstp,
+			      const struct nfsd4_op *op)
 {
 	return (op_encode_hdr_size + op_encode_change_info_maxsz
 		+ op_encode_change_info_maxsz) * sizeof(__be32);
 }
 
-static inline u32 nfsd4_sequence_rsize(struct svc_rqst *rqstp,
-				       struct nfsd4_op *op)
+static u32 nfsd4_sequence_rsize(const struct svc_rqst *rqstp,
+				const struct nfsd4_op *op)
 {
 	return (op_encode_hdr_size
 		+ XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5) * sizeof(__be32);
 }
 
-static inline u32 nfsd4_test_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
+static u32 nfsd4_test_stateid_rsize(const struct svc_rqst *rqstp,
+				    const struct nfsd4_op *op)
 {
 	return (op_encode_hdr_size + 1 + op->u.test_stateid.ts_num_ids)
 		* sizeof(__be32);
 }
 
-static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
+static u32 nfsd4_setattr_rsize(const struct svc_rqst *rqstp,
+			       const struct nfsd4_op *op)
 {
 	return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
 }
 
-static inline u32 nfsd4_secinfo_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
+static u32 nfsd4_secinfo_rsize(const struct svc_rqst *rqstp,
+			       const struct nfsd4_op *op)
 {
 	return (op_encode_hdr_size + RPC_AUTH_MAXFLAVOR *
 		(4 + XDR_QUADLEN(GSS_OID_MAX_LEN))) * sizeof(__be32);
 }
 
-static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
+static u32 nfsd4_setclientid_rsize(const struct svc_rqst *rqstp,
+				   const struct nfsd4_op *op)
 {
 	return (op_encode_hdr_size + 2 + XDR_QUADLEN(NFS4_VERIFIER_SIZE)) *
 								sizeof(__be32);
 }
 
-static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
+static u32 nfsd4_write_rsize(const struct svc_rqst *rqstp,
+			     const struct nfsd4_op *op)
 {
 	return (op_encode_hdr_size + 2 + op_encode_verifier_maxsz) * sizeof(__be32);
 }
 
-static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
+static u32 nfsd4_exchange_id_rsize(const struct svc_rqst *rqstp,
+				   const struct nfsd4_op *op)
 {
 	return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\
 		1 + 1 + /* eir_flags, spr_how */\
@@ -2958,14 +2997,16 @@ static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_o
 		0 /* ignored eir_server_impl_id contents */) * sizeof(__be32);
 }
 
-static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
+static u32 nfsd4_bind_conn_to_session_rsize(const struct svc_rqst *rqstp,
+					    const struct nfsd4_op *op)
 {
 	return (op_encode_hdr_size + \
 		XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\
 		2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32);
 }
 
-static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
+static u32 nfsd4_create_session_rsize(const struct svc_rqst *rqstp,
+				      const struct nfsd4_op *op)
 {
 	return (op_encode_hdr_size + \
 		XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\
@@ -2974,7 +3015,8 @@ static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd
 		op_encode_channel_attrs_maxsz) * sizeof(__be32);
 }
 
-static inline u32 nfsd4_copy_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
+static u32 nfsd4_copy_rsize(const struct svc_rqst *rqstp,
+			    const struct nfsd4_op *op)
 {
 	return (op_encode_hdr_size +
 		1 /* wr_callback */ +
@@ -2986,16 +3028,16 @@ static inline u32 nfsd4_copy_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
 		1 /* cr_synchronous */) * sizeof(__be32);
 }
 
-static inline u32 nfsd4_offload_status_rsize(struct svc_rqst *rqstp,
-					     struct nfsd4_op *op)
+static u32 nfsd4_offload_status_rsize(const struct svc_rqst *rqstp,
+				      const struct nfsd4_op *op)
 {
 	return (op_encode_hdr_size +
 		2 /* osr_count */ +
 		1 /* osr_complete<1> optional 0 for now */) * sizeof(__be32);
 }
 
-static inline u32 nfsd4_copy_notify_rsize(struct svc_rqst *rqstp,
-					struct nfsd4_op *op)
+static u32 nfsd4_copy_notify_rsize(const struct svc_rqst *rqstp,
+				   const struct nfsd4_op *op)
 {
 	return (op_encode_hdr_size +
 		3 /* cnr_lease_time */ +
@@ -3010,12 +3052,10 @@ static inline u32 nfsd4_copy_notify_rsize(struct svc_rqst *rqstp,
 }
 
 #ifdef CONFIG_NFSD_PNFS
-static inline u32 nfsd4_getdeviceinfo_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
+static u32 nfsd4_getdeviceinfo_rsize(const struct svc_rqst *rqstp,
+				     const struct nfsd4_op *op)
 {
-	u32 maxcount = 0, rlen = 0;
-
-	maxcount = svc_max_payload(rqstp);
-	rlen = min(op->u.getdeviceinfo.gd_maxcount, maxcount);
+	u32 rlen = min(op->u.getdeviceinfo.gd_maxcount, nfsd4_max_payload(rqstp));
 
 	return (op_encode_hdr_size +
 		1 /* gd_layout_type*/ +
@@ -3028,7 +3068,8 @@ static inline u32 nfsd4_getdeviceinfo_rsize(struct svc_rqst *rqstp, struct nfsd4
  * so we need to define an arbitrary upper bound here.
  */
 #define MAX_LAYOUT_SIZE		128
-static inline u32 nfsd4_layoutget_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
+static u32 nfsd4_layoutget_rsize(const struct svc_rqst *rqstp,
+				 const struct nfsd4_op *op)
 {
 	return (op_encode_hdr_size +
 		1 /* logr_return_on_close */ +
@@ -3037,14 +3078,16 @@ static inline u32 nfsd4_layoutget_rsize(struct svc_rqst *rqstp, struct nfsd4_op
 		MAX_LAYOUT_SIZE) * sizeof(__be32);
 }
 
-static inline u32 nfsd4_layoutcommit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
+static u32 nfsd4_layoutcommit_rsize(const struct svc_rqst *rqstp,
+				    const struct nfsd4_op *op)
 {
 	return (op_encode_hdr_size +
 		1 /* locr_newsize */ +
 		2 /* ns_size */) * sizeof(__be32);
 }
 
-static inline u32 nfsd4_layoutreturn_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
+static u32 nfsd4_layoutreturn_rsize(const struct svc_rqst *rqstp,
+				    const struct nfsd4_op *op)
 {
 	return (op_encode_hdr_size +
 		1 /* lrs_stateid */ +
@@ -3053,41 +3096,36 @@ static inline u32 nfsd4_layoutreturn_rsize(struct svc_rqst *rqstp, struct nfsd4_
 #endif /* CONFIG_NFSD_PNFS */
 
 
-static inline u32 nfsd4_seek_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
+static u32 nfsd4_seek_rsize(const struct svc_rqst *rqstp,
+			    const struct nfsd4_op *op)
 {
 	return (op_encode_hdr_size + 3) * sizeof(__be32);
 }
 
-static inline u32 nfsd4_getxattr_rsize(struct svc_rqst *rqstp,
-				       struct nfsd4_op *op)
+static u32 nfsd4_getxattr_rsize(const struct svc_rqst *rqstp,
+				const struct nfsd4_op *op)
 {
-	u32 maxcount, rlen;
-
-	maxcount = svc_max_payload(rqstp);
-	rlen = min_t(u32, XATTR_SIZE_MAX, maxcount);
+	u32 rlen = min_t(u32, XATTR_SIZE_MAX, nfsd4_max_payload(rqstp));
 
 	return (op_encode_hdr_size + 1 + XDR_QUADLEN(rlen)) * sizeof(__be32);
 }
 
-static inline u32 nfsd4_setxattr_rsize(struct svc_rqst *rqstp,
-				       struct nfsd4_op *op)
+static u32 nfsd4_setxattr_rsize(const struct svc_rqst *rqstp,
+				const struct nfsd4_op *op)
 {
 	return (op_encode_hdr_size + op_encode_change_info_maxsz)
 		* sizeof(__be32);
 }
-static inline u32 nfsd4_listxattrs_rsize(struct svc_rqst *rqstp,
-					 struct nfsd4_op *op)
+static u32 nfsd4_listxattrs_rsize(const struct svc_rqst *rqstp,
+				  const struct nfsd4_op *op)
 {
-	u32 maxcount, rlen;
-
-	maxcount = svc_max_payload(rqstp);
-	rlen = min(op->u.listxattrs.lsxa_maxcount, maxcount);
+	u32 rlen = min(op->u.listxattrs.lsxa_maxcount, nfsd4_max_payload(rqstp));
 
 	return (op_encode_hdr_size + 4 + XDR_QUADLEN(rlen)) * sizeof(__be32);
 }
 
-static inline u32 nfsd4_removexattr_rsize(struct svc_rqst *rqstp,
-					  struct nfsd4_op *op)
+static u32 nfsd4_removexattr_rsize(const struct svc_rqst *rqstp,
+				   const struct nfsd4_op *op)
 {
 	return (op_encode_hdr_size + op_encode_change_info_maxsz)
 		* sizeof(__be32);
@@ -3576,6 +3614,7 @@ static const struct svc_procedure nfsd_procedures4[2] = {
 		.pc_decode = nfssvc_decode_voidarg,
 		.pc_encode = nfssvc_encode_voidres,
 		.pc_argsize = sizeof(struct nfsd_voidargs),
+		.pc_argzero = sizeof(struct nfsd_voidargs),
 		.pc_ressize = sizeof(struct nfsd_voidres),
 		.pc_cachetype = RC_NOCACHE,
 		.pc_xdrressize = 1,
@@ -3586,6 +3625,7 @@ static const struct svc_procedure nfsd_procedures4[2] = {
 		.pc_decode = nfs4svc_decode_compoundargs,
 		.pc_encode = nfs4svc_encode_compoundres,
 		.pc_argsize = sizeof(struct nfsd4_compoundargs),
+		.pc_argzero = offsetof(struct nfsd4_compoundargs, iops),
 		.pc_ressize = sizeof(struct nfsd4_compoundres),
 		.pc_release = nfsd4_release_compoundargs,
 		.pc_cachetype = RC_NOCACHE,
diff --git a/fs/nfsd/nfs4recover.c b/fs/nfsd/nfs4recover.c
index c634483d85d2..5d680045fa2c 100644
--- a/fs/nfsd/nfs4recover.c
+++ b/fs/nfsd/nfs4recover.c
@@ -807,16 +807,18 @@ __cld_pipe_inprogress_downcall(const struct cld_msg_v2 __user *cmsg,
 			if (get_user(namelen, &ci->cc_name.cn_len))
 				return -EFAULT;
 			name.data = memdup_user(&ci->cc_name.cn_id, namelen);
-			if (IS_ERR_OR_NULL(name.data))
-				return -EFAULT;
+			if (IS_ERR(name.data))
+				return PTR_ERR(name.data);
 			name.len = namelen;
 			get_user(princhashlen, &ci->cc_princhash.cp_len);
 			if (princhashlen > 0) {
 				princhash.data = memdup_user(
 						&ci->cc_princhash.cp_data,
 						princhashlen);
-				if (IS_ERR_OR_NULL(princhash.data))
-					return -EFAULT;
+				if (IS_ERR(princhash.data)) {
+					kfree(name.data);
+					return PTR_ERR(princhash.data);
+				}
 				princhash.len = princhashlen;
 			} else
 				princhash.len = 0;
@@ -827,8 +829,8 @@ __cld_pipe_inprogress_downcall(const struct cld_msg_v2 __user *cmsg,
 			if (get_user(namelen, &cnm->cn_len))
 				return -EFAULT;
 			name.data = memdup_user(&cnm->cn_id, namelen);
-			if (IS_ERR_OR_NULL(name.data))
-				return -EFAULT;
+			if (IS_ERR(name.data))
+				return PTR_ERR(name.data);
 			name.len = namelen;
 		}
 		if (name.len > 5 && memcmp(name.data, "hash:", 5) == 0) {
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index c5d199d7e6b4..198d7abf34e4 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -160,6 +160,13 @@ static bool is_client_expired(struct nfs4_client *clp)
 	return clp->cl_time == 0;
 }
 
+static void nfsd4_dec_courtesy_client_count(struct nfsd_net *nn,
+					struct nfs4_client *clp)
+{
+	if (clp->cl_state != NFSD4_ACTIVE)
+		atomic_add_unless(&nn->nfsd_courtesy_clients, -1, 0);
+}
+
 static __be32 get_client_locked(struct nfs4_client *clp)
 {
 	struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
@@ -169,6 +176,7 @@ static __be32 get_client_locked(struct nfs4_client *clp)
 	if (is_client_expired(clp))
 		return nfserr_expired;
 	atomic_inc(&clp->cl_rpc_users);
+	nfsd4_dec_courtesy_client_count(nn, clp);
 	clp->cl_state = NFSD4_ACTIVE;
 	return nfs_ok;
 }
@@ -190,6 +198,7 @@ renew_client_locked(struct nfs4_client *clp)
 
 	list_move_tail(&clp->cl_lru, &nn->client_lru);
 	clp->cl_time = ktime_get_boottime_seconds();
+	nfsd4_dec_courtesy_client_count(nn, clp);
 	clp->cl_state = NFSD4_ACTIVE;
 }
 
@@ -357,6 +366,8 @@ nfsd4_cb_notify_lock_prepare(struct nfsd4_callback *cb)
 static int
 nfsd4_cb_notify_lock_done(struct nfsd4_callback *cb, struct rpc_task *task)
 {
+	trace_nfsd_cb_notify_lock_done(&zero_stateid, task);
+
 	/*
 	 * Since this is just an optimization, we don't try very hard if it
 	 * turns out not to succeed. We'll requeue it on NFS4ERR_DELAY, and
@@ -963,19 +974,19 @@ out_free:
  * Create a unique stateid_t to represent each COPY.
  */
 static int nfs4_init_cp_state(struct nfsd_net *nn, copy_stateid_t *stid,
-			      unsigned char sc_type)
+			      unsigned char cs_type)
 {
 	int new_id;
 
-	stid->stid.si_opaque.so_clid.cl_boot = (u32)nn->boot_time;
-	stid->stid.si_opaque.so_clid.cl_id = nn->s2s_cp_cl_id;
-	stid->sc_type = sc_type;
+	stid->cs_stid.si_opaque.so_clid.cl_boot = (u32)nn->boot_time;
+	stid->cs_stid.si_opaque.so_clid.cl_id = nn->s2s_cp_cl_id;
+	stid->cs_type = cs_type;
 
 	idr_preload(GFP_KERNEL);
 	spin_lock(&nn->s2s_cp_lock);
 	new_id = idr_alloc_cyclic(&nn->s2s_cp_stateids, stid, 0, 0, GFP_NOWAIT);
-	stid->stid.si_opaque.so_id = new_id;
-	stid->stid.si_generation = 1;
+	stid->cs_stid.si_opaque.so_id = new_id;
+	stid->cs_stid.si_generation = 1;
 	spin_unlock(&nn->s2s_cp_lock);
 	idr_preload_end();
 	if (new_id < 0)
@@ -997,7 +1008,7 @@ struct nfs4_cpntf_state *nfs4_alloc_init_cpntf_state(struct nfsd_net *nn,
 	if (!cps)
 		return NULL;
 	cps->cpntf_time = ktime_get_boottime_seconds();
-	refcount_set(&cps->cp_stateid.sc_count, 1);
+	refcount_set(&cps->cp_stateid.cs_count, 1);
 	if (!nfs4_init_cp_state(nn, &cps->cp_stateid, NFS4_COPYNOTIFY_STID))
 		goto out_free;
 	spin_lock(&nn->s2s_cp_lock);
@@ -1013,11 +1024,11 @@ void nfs4_free_copy_state(struct nfsd4_copy *copy)
 {
 	struct nfsd_net *nn;
 
-	WARN_ON_ONCE(copy->cp_stateid.sc_type != NFS4_COPY_STID);
+	WARN_ON_ONCE(copy->cp_stateid.cs_type != NFS4_COPY_STID);
 	nn = net_generic(copy->cp_clp->net, nfsd_net_id);
 	spin_lock(&nn->s2s_cp_lock);
 	idr_remove(&nn->s2s_cp_stateids,
-		   copy->cp_stateid.stid.si_opaque.so_id);
+		   copy->cp_stateid.cs_stid.si_opaque.so_id);
 	spin_unlock(&nn->s2s_cp_lock);
 }
 
@@ -1049,6 +1060,12 @@ static struct nfs4_ol_stateid * nfs4_alloc_open_stateid(struct nfs4_client *clp)
 
 static void nfs4_free_deleg(struct nfs4_stid *stid)
 {
+	struct nfs4_delegation *dp = delegstateid(stid);
+
+	WARN_ON_ONCE(!list_empty(&stid->sc_cp_list));
+	WARN_ON_ONCE(!list_empty(&dp->dl_perfile));
+	WARN_ON_ONCE(!list_empty(&dp->dl_perclnt));
+	WARN_ON_ONCE(!list_empty(&dp->dl_recall_lru));
 	kmem_cache_free(deleg_slab, stid);
 	atomic_long_dec(&num_delegations);
 }
@@ -1462,6 +1479,7 @@ static void nfs4_free_ol_stateid(struct nfs4_stid *stid)
 	release_all_access(stp);
 	if (stp->st_stateowner)
 		nfs4_put_stateowner(stp->st_stateowner);
+	WARN_ON(!list_empty(&stid->sc_cp_list));
 	kmem_cache_free(stateid_slab, stid);
 }
 
@@ -2233,6 +2251,7 @@ __destroy_client(struct nfs4_client *clp)
 	if (clp->cl_cb_conn.cb_xprt)
 		svc_xprt_put(clp->cl_cb_conn.cb_xprt);
 	atomic_add_unless(&nn->nfs4_client_count, -1, 0);
+	nfsd4_dec_courtesy_client_count(nn, clp);
 	free_client(clp);
 	wake_up_all(&expiry_wq);
 }
@@ -2478,7 +2497,7 @@ static const char *cb_state2str(int state)
 
 static int client_info_show(struct seq_file *m, void *v)
 {
-	struct inode *inode = m->private;
+	struct inode *inode = file_inode(m->file);
 	struct nfs4_client *clp;
 	u64 clid;
 
@@ -2518,17 +2537,7 @@ static int client_info_show(struct seq_file *m, void *v)
 	return 0;
 }
 
-static int client_info_open(struct inode *inode, struct file *file)
-{
-	return single_open(file, client_info_show, inode);
-}
-
-static const struct file_operations client_info_fops = {
-	.open		= client_info_open,
-	.read		= seq_read,
-	.llseek		= seq_lseek,
-	.release	= single_release,
-};
+DEFINE_SHOW_ATTRIBUTE(client_info);
 
 static void *states_start(struct seq_file *s, loff_t *pos)
 	__acquires(&clp->cl_lock)
@@ -4337,7 +4346,27 @@ out:
 	return -ENOMEM;
 }
 
-void nfsd4_init_leases_net(struct nfsd_net *nn)
+static unsigned long
+nfsd_courtesy_client_count(struct shrinker *shrink, struct shrink_control *sc)
+{
+	int cnt;
+	struct nfsd_net *nn = container_of(shrink,
+			struct nfsd_net, nfsd_client_shrinker);
+
+	cnt = atomic_read(&nn->nfsd_courtesy_clients);
+	if (cnt > 0)
+		mod_delayed_work(laundry_wq, &nn->nfsd_shrinker_work, 0);
+	return (unsigned long)cnt;
+}
+
+static unsigned long
+nfsd_courtesy_client_scan(struct shrinker *shrink, struct shrink_control *sc)
+{
+	return SHRINK_STOP;
+}
+
+int
+nfsd4_init_leases_net(struct nfsd_net *nn)
 {
 	struct sysinfo si;
 	u64 max_clients;
@@ -4356,6 +4385,18 @@ void nfsd4_init_leases_net(struct nfsd_net *nn)
 	max_clients = (u64)si.totalram * si.mem_unit / (1024 * 1024 * 1024);
 	max_clients *= NFS4_CLIENTS_PER_GB;
 	nn->nfs4_max_clients = max_t(int, max_clients, NFS4_CLIENTS_PER_GB);
+
+	atomic_set(&nn->nfsd_courtesy_clients, 0);
+	nn->nfsd_client_shrinker.scan_objects = nfsd_courtesy_client_scan;
+	nn->nfsd_client_shrinker.count_objects = nfsd_courtesy_client_count;
+	nn->nfsd_client_shrinker.seeks = DEFAULT_SEEKS;
+	return register_shrinker(&nn->nfsd_client_shrinker, "nfsd-client");
+}
+
+void
+nfsd4_leases_net_shutdown(struct nfsd_net *nn)
+{
+	unregister_shrinker(&nn->nfsd_client_shrinker);
 }
 
 static void init_nfs4_replay(struct nfs4_replay *rp)
@@ -4715,6 +4756,35 @@ nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type)
 	return ret;
 }
 
+static bool nfsd4_deleg_present(const struct inode *inode)
+{
+	struct file_lock_context *ctx = smp_load_acquire(&inode->i_flctx);
+
+	return ctx && !list_empty_careful(&ctx->flc_lease);
+}
+
+/**
+ * nfsd_wait_for_delegreturn - wait for delegations to be returned
+ * @rqstp: the RPC transaction being executed
+ * @inode: in-core inode of the file being waited for
+ *
+ * The timeout prevents deadlock if all nfsd threads happen to be
+ * tied up waiting for returning delegations.
+ *
+ * Return values:
+ *   %true: delegation was returned
+ *   %false: timed out waiting for delegreturn
+ */
+bool nfsd_wait_for_delegreturn(struct svc_rqst *rqstp, struct inode *inode)
+{
+	long __maybe_unused timeo;
+
+	timeo = wait_var_event_timeout(inode, !nfsd4_deleg_present(inode),
+				       NFSD_DELEGRETURN_TIMEOUT);
+	trace_nfsd_delegret_wakeup(rqstp, inode, timeo);
+	return timeo > 0;
+}
+
 static void nfsd4_cb_recall_prepare(struct nfsd4_callback *cb)
 {
 	struct nfs4_delegation *dp = cb_to_delegation(cb);
@@ -4743,6 +4813,8 @@ static int nfsd4_cb_recall_done(struct nfsd4_callback *cb,
 {
 	struct nfs4_delegation *dp = cb_to_delegation(cb);
 
+	trace_nfsd_cb_recall_done(&dp->dl_stid.sc_stateid, task);
+
 	if (dp->dl_stid.sc_type == NFS4_CLOSED_DELEG_STID ||
 	    dp->dl_stid.sc_type == NFS4_REVOKED_DELEG_STID)
 	        return 1;
@@ -4788,18 +4860,17 @@ static void nfsd_break_one_deleg(struct nfs4_delegation *dp)
 	 * We're assuming the state code never drops its reference
 	 * without first removing the lease.  Since we're in this lease
 	 * callback (and since the lease code is serialized by the
-	 * i_lock) we know the server hasn't removed the lease yet, and
+	 * flc_lock) we know the server hasn't removed the lease yet, and
 	 * we know it's safe to take a reference.
 	 */
 	refcount_inc(&dp->dl_stid.sc_count);
-	nfsd4_run_cb(&dp->dl_recall);
+	WARN_ON_ONCE(!nfsd4_run_cb(&dp->dl_recall));
 }
 
-/* Called from break_lease() with i_lock held. */
+/* Called from break_lease() with flc_lock held. */
 static bool
 nfsd_break_deleg_cb(struct file_lock *fl)
 {
-	bool ret = false;
 	struct nfs4_delegation *dp = (struct nfs4_delegation *)fl->fl_owner;
 	struct nfs4_file *fp = dp->dl_stid.sc_file;
 	struct nfs4_client *clp = dp->dl_stid.sc_client;
@@ -4825,7 +4896,7 @@ nfsd_break_deleg_cb(struct file_lock *fl)
 	fp->fi_had_conflict = true;
 	nfsd_break_one_deleg(dp);
 	spin_unlock(&fp->fi_lock);
-	return ret;
+	return false;
 }
 
 /**
@@ -5878,8 +5949,11 @@ nfs4_get_client_reaplist(struct nfsd_net *nn, struct list_head *reaplist,
 			goto exp_client;
 		if (!state_expired(lt, clp->cl_time))
 			break;
-		if (!atomic_read(&clp->cl_rpc_users))
+		if (!atomic_read(&clp->cl_rpc_users)) {
+			if (clp->cl_state == NFSD4_ACTIVE)
+				atomic_inc(&nn->nfsd_courtesy_clients);
 			clp->cl_state = NFSD4_COURTESY;
+		}
 		if (!client_has_state(clp))
 			goto exp_client;
 		if (!nfs4_anylock_blockers(clp))
@@ -5894,10 +5968,49 @@ exp_client:
 	spin_unlock(&nn->client_lock);
 }
 
+static void
+nfs4_get_courtesy_client_reaplist(struct nfsd_net *nn,
+				struct list_head *reaplist)
+{
+	unsigned int maxreap = 0, reapcnt = 0;
+	struct list_head *pos, *next;
+	struct nfs4_client *clp;
+
+	maxreap = NFSD_CLIENT_MAX_TRIM_PER_RUN;
+	INIT_LIST_HEAD(reaplist);
+
+	spin_lock(&nn->client_lock);
+	list_for_each_safe(pos, next, &nn->client_lru) {
+		clp = list_entry(pos, struct nfs4_client, cl_lru);
+		if (clp->cl_state == NFSD4_ACTIVE)
+			break;
+		if (reapcnt >= maxreap)
+			break;
+		if (!mark_client_expired_locked(clp)) {
+			list_add(&clp->cl_lru, reaplist);
+			reapcnt++;
+		}
+	}
+	spin_unlock(&nn->client_lock);
+}
+
+static void
+nfs4_process_client_reaplist(struct list_head *reaplist)
+{
+	struct list_head *pos, *next;
+	struct nfs4_client *clp;
+
+	list_for_each_safe(pos, next, reaplist) {
+		clp = list_entry(pos, struct nfs4_client, cl_lru);
+		trace_nfsd_clid_purged(&clp->cl_clientid);
+		list_del_init(&clp->cl_lru);
+		expire_client(clp);
+	}
+}
+
 static time64_t
 nfs4_laundromat(struct nfsd_net *nn)
 {
-	struct nfs4_client *clp;
 	struct nfs4_openowner *oo;
 	struct nfs4_delegation *dp;
 	struct nfs4_ol_stateid *stp;
@@ -5920,18 +6033,14 @@ nfs4_laundromat(struct nfsd_net *nn)
 	spin_lock(&nn->s2s_cp_lock);
 	idr_for_each_entry(&nn->s2s_cp_stateids, cps_t, i) {
 		cps = container_of(cps_t, struct nfs4_cpntf_state, cp_stateid);
-		if (cps->cp_stateid.sc_type == NFS4_COPYNOTIFY_STID &&
+		if (cps->cp_stateid.cs_type == NFS4_COPYNOTIFY_STID &&
 				state_expired(&lt, cps->cpntf_time))
 			_free_cpntf_state_locked(nn, cps);
 	}
 	spin_unlock(&nn->s2s_cp_lock);
 	nfs4_get_client_reaplist(nn, &reaplist, &lt);
-	list_for_each_safe(pos, next, &reaplist) {
-		clp = list_entry(pos, struct nfs4_client, cl_lru);
-		trace_nfsd_clid_purged(&clp->cl_clientid);
-		list_del_init(&clp->cl_lru);
-		expire_client(clp);
-	}
+	nfs4_process_client_reaplist(&reaplist);
+
 	spin_lock(&state_lock);
 	list_for_each_safe(pos, next, &nn->del_recall_lru) {
 		dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
@@ -6014,6 +6123,18 @@ laundromat_main(struct work_struct *laundry)
 	queue_delayed_work(laundry_wq, &nn->laundromat_work, t*HZ);
 }
 
+static void
+courtesy_client_reaper(struct work_struct *reaper)
+{
+	struct list_head reaplist;
+	struct delayed_work *dwork = to_delayed_work(reaper);
+	struct nfsd_net *nn = container_of(dwork, struct nfsd_net,
+					nfsd_shrinker_work);
+
+	nfs4_get_courtesy_client_reaplist(nn, &reaplist);
+	nfs4_process_client_reaplist(&reaplist);
+}
+
 static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stid *stp)
 {
 	if (!fh_match(&fhp->fh_handle, &stp->sc_file->fi_fhandle))
@@ -6149,6 +6270,7 @@ nfsd4_lookup_stateid(struct nfsd4_compound_state *cstate,
 		     struct nfs4_stid **s, struct nfsd_net *nn)
 {
 	__be32 status;
+	struct nfs4_stid *stid;
 	bool return_revoked = false;
 
 	/*
@@ -6171,15 +6293,16 @@ nfsd4_lookup_stateid(struct nfsd4_compound_state *cstate,
 	}
 	if (status)
 		return status;
-	*s = find_stateid_by_type(cstate->clp, stateid, typemask);
-	if (!*s)
+	stid = find_stateid_by_type(cstate->clp, stateid, typemask);
+	if (!stid)
 		return nfserr_bad_stateid;
-	if (((*s)->sc_type == NFS4_REVOKED_DELEG_STID) && !return_revoked) {
-		nfs4_put_stid(*s);
+	if ((stid->sc_type == NFS4_REVOKED_DELEG_STID) && !return_revoked) {
+		nfs4_put_stid(stid);
 		if (cstate->minorversion)
 			return nfserr_deleg_revoked;
 		return nfserr_bad_stateid;
 	}
+	*s = stid;
 	return nfs_ok;
 }
 
@@ -6244,12 +6367,12 @@ out:
 static void
 _free_cpntf_state_locked(struct nfsd_net *nn, struct nfs4_cpntf_state *cps)
 {
-	WARN_ON_ONCE(cps->cp_stateid.sc_type != NFS4_COPYNOTIFY_STID);
-	if (!refcount_dec_and_test(&cps->cp_stateid.sc_count))
+	WARN_ON_ONCE(cps->cp_stateid.cs_type != NFS4_COPYNOTIFY_STID);
+	if (!refcount_dec_and_test(&cps->cp_stateid.cs_count))
 		return;
 	list_del(&cps->cp_list);
 	idr_remove(&nn->s2s_cp_stateids,
-		   cps->cp_stateid.stid.si_opaque.so_id);
+		   cps->cp_stateid.cs_stid.si_opaque.so_id);
 	kfree(cps);
 }
 /*
@@ -6271,12 +6394,12 @@ __be32 manage_cpntf_state(struct nfsd_net *nn, stateid_t *st,
 	if (cps_t) {
 		state = container_of(cps_t, struct nfs4_cpntf_state,
 				     cp_stateid);
-		if (state->cp_stateid.sc_type != NFS4_COPYNOTIFY_STID) {
+		if (state->cp_stateid.cs_type != NFS4_COPYNOTIFY_STID) {
 			state = NULL;
 			goto unlock;
 		}
 		if (!clp)
-			refcount_inc(&state->cp_stateid.sc_count);
+			refcount_inc(&state->cp_stateid.cs_count);
 		else
 			_free_cpntf_state_locked(nn, state);
 	}
@@ -6684,6 +6807,7 @@ static void nfsd4_close_open_stateid(struct nfs4_ol_stateid *s)
 	struct nfs4_client *clp = s->st_stid.sc_client;
 	bool unhashed;
 	LIST_HEAD(reaplist);
+	struct nfs4_ol_stateid *stp;
 
 	spin_lock(&clp->cl_lock);
 	unhashed = unhash_open_stateid(s, &reaplist);
@@ -6692,6 +6816,8 @@ static void nfsd4_close_open_stateid(struct nfs4_ol_stateid *s)
 		if (unhashed)
 			put_ol_stateid_locked(s, &reaplist);
 		spin_unlock(&clp->cl_lock);
+		list_for_each_entry(stp, &reaplist, st_locks)
+			nfs4_free_cpntf_statelist(clp->net, &stp->st_stid);
 		free_ol_stateid_reaplist(&reaplist);
 	} else {
 		spin_unlock(&clp->cl_lock);
@@ -6775,6 +6901,7 @@ nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 	if (status)
 		goto put_stateid;
 
+	wake_up_var(d_inode(cstate->current_fh.fh_dentry));
 	destroy_delegation(dp);
 put_stateid:
 	nfs4_put_stid(&dp->dl_stid);
@@ -7830,6 +7957,7 @@ static int nfs4_state_create_net(struct net *net)
 	INIT_LIST_HEAD(&nn->blocked_locks_lru);
 
 	INIT_DELAYED_WORK(&nn->laundromat_work, laundromat_main);
+	INIT_DELAYED_WORK(&nn->nfsd_shrinker_work, courtesy_client_reaper);
 	get_net(net);
 
 	return 0;
diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c
index 1e9690a061ec..bcfeb1a922c0 100644
--- a/fs/nfsd/nfs4xdr.c
+++ b/fs/nfsd/nfs4xdr.c
@@ -42,6 +42,8 @@
 #include <linux/sunrpc/svcauth_gss.h>
 #include <linux/sunrpc/addr.h>
 #include <linux/xattr.h>
+#include <linux/vmalloc.h>
+
 #include <uapi/linux/xattr.h>
 
 #include "idmap.h"
@@ -791,6 +793,7 @@ nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit
 		return nfserr_bad_xdr;
 	if (xdr_stream_decode_u32(argp->xdr, &commit->co_count) < 0)
 		return nfserr_bad_xdr;
+	memset(&commit->co_verf, 0, sizeof(commit->co_verf));
 	return nfs_ok;
 }
 
@@ -799,6 +802,7 @@ nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create
 {
 	__be32 *p, status;
 
+	memset(create, 0, sizeof(*create));
 	if (xdr_stream_decode_u32(argp->xdr, &create->cr_type) < 0)
 		return nfserr_bad_xdr;
 	switch (create->cr_type) {
@@ -848,6 +852,7 @@ nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegretu
 static inline __be32
 nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
 {
+	memset(getattr, 0, sizeof(*getattr));
 	return nfsd4_decode_bitmap4(argp, getattr->ga_bmval,
 				    ARRAY_SIZE(getattr->ga_bmval));
 }
@@ -855,6 +860,7 @@ nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *geta
 static __be32
 nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
 {
+	memset(link, 0, sizeof(*link));
 	return nfsd4_decode_component4(argp, &link->li_name, &link->li_namelen);
 }
 
@@ -903,6 +909,7 @@ nfsd4_decode_locker4(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
 static __be32
 nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
 {
+	memset(lock, 0, sizeof(*lock));
 	if (xdr_stream_decode_u32(argp->xdr, &lock->lk_type) < 0)
 		return nfserr_bad_xdr;
 	if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
@@ -919,6 +926,7 @@ nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
 static __be32
 nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
 {
+	memset(lockt, 0, sizeof(*lockt));
 	if (xdr_stream_decode_u32(argp->xdr, &lockt->lt_type) < 0)
 		return nfserr_bad_xdr;
 	if ((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
@@ -1140,11 +1148,8 @@ nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
 	__be32 status;
 	u32 dummy;
 
-	memset(open->op_bmval, 0, sizeof(open->op_bmval));
-	open->op_iattr.ia_valid = 0;
-	open->op_openowner = NULL;
+	memset(open, 0, sizeof(*open));
 
-	open->op_xdr_error = 0;
 	if (xdr_stream_decode_u32(argp->xdr, &open->op_seqid) < 0)
 		return nfserr_bad_xdr;
 	/* deleg_want is ignored */
@@ -1179,6 +1184,8 @@ nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_con
 	if (xdr_stream_decode_u32(argp->xdr, &open_conf->oc_seqid) < 0)
 		return nfserr_bad_xdr;
 
+	memset(&open_conf->oc_resp_stateid, 0,
+	       sizeof(open_conf->oc_resp_stateid));
 	return nfs_ok;
 }
 
@@ -1187,6 +1194,7 @@ nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_d
 {
 	__be32 status;
 
+	memset(open_down, 0, sizeof(*open_down));
 	status = nfsd4_decode_stateid4(argp, &open_down->od_stateid);
 	if (status)
 		return status;
@@ -1216,6 +1224,7 @@ nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
 	if (!putfh->pf_fhval)
 		return nfserr_jukebox;
 
+	putfh->no_verify = false;
 	return nfs_ok;
 }
 
@@ -1232,6 +1241,7 @@ nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
 {
 	__be32 status;
 
+	memset(read, 0, sizeof(*read));
 	status = nfsd4_decode_stateid4(argp, &read->rd_stateid);
 	if (status)
 		return status;
@@ -1248,6 +1258,7 @@ nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *read
 {
 	__be32 status;
 
+	memset(readdir, 0, sizeof(*readdir));
 	if (xdr_stream_decode_u64(argp->xdr, &readdir->rd_cookie) < 0)
 		return nfserr_bad_xdr;
 	status = nfsd4_decode_verifier4(argp, &readdir->rd_verf);
@@ -1267,6 +1278,7 @@ nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *read
 static __be32
 nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
 {
+	memset(&remove->rm_cinfo, 0, sizeof(remove->rm_cinfo));
 	return nfsd4_decode_component4(argp, &remove->rm_name, &remove->rm_namelen);
 }
 
@@ -1275,6 +1287,7 @@ nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename
 {
 	__be32 status;
 
+	memset(rename, 0, sizeof(*rename));
 	status = nfsd4_decode_component4(argp, &rename->rn_sname, &rename->rn_snamelen);
 	if (status)
 		return status;
@@ -1291,6 +1304,7 @@ static __be32
 nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
 		     struct nfsd4_secinfo *secinfo)
 {
+	secinfo->si_exp = NULL;
 	return nfsd4_decode_component4(argp, &secinfo->si_name, &secinfo->si_namelen);
 }
 
@@ -1299,6 +1313,7 @@ nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *seta
 {
 	__be32 status;
 
+	memset(setattr, 0, sizeof(*setattr));
 	status = nfsd4_decode_stateid4(argp, &setattr->sa_stateid);
 	if (status)
 		return status;
@@ -1313,6 +1328,8 @@ nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclient
 {
 	__be32 *p, status;
 
+	memset(setclientid, 0, sizeof(*setclientid));
+
 	if (argp->minorversion >= 1)
 		return nfserr_notsupp;
 
@@ -1369,6 +1386,8 @@ nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify
 {
 	__be32 *p, status;
 
+	memset(verify, 0, sizeof(*verify));
+
 	status = nfsd4_decode_bitmap4(argp, verify->ve_bmval,
 				      ARRAY_SIZE(verify->ve_bmval));
 	if (status)
@@ -1408,6 +1427,9 @@ nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
 	if (!xdr_stream_subsegment(argp->xdr, &write->wr_payload, write->wr_buflen))
 		return nfserr_bad_xdr;
 
+	write->wr_bytes_written = 0;
+	write->wr_how_written = 0;
+	memset(&write->wr_verifier, 0, sizeof(write->wr_verifier));
 	return nfs_ok;
 }
 
@@ -1432,6 +1454,7 @@ nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_rel
 
 static __be32 nfsd4_decode_backchannel_ctl(struct nfsd4_compoundargs *argp, struct nfsd4_backchannel_ctl *bc)
 {
+	memset(bc, 0, sizeof(*bc));
 	if (xdr_stream_decode_u32(argp->xdr, &bc->bc_cb_program) < 0)
 		return nfserr_bad_xdr;
 	return nfsd4_decode_cb_sec(argp, &bc->bc_cb_sec);
@@ -1442,6 +1465,7 @@ static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp,
 	u32 use_conn_in_rdma_mode;
 	__be32 status;
 
+	memset(bcts, 0, sizeof(*bcts));
 	status = nfsd4_decode_sessionid4(argp, &bcts->sessionid);
 	if (status)
 		return status;
@@ -1583,6 +1607,7 @@ nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
 {
 	__be32 status;
 
+	memset(exid, 0, sizeof(*exid));
 	status = nfsd4_decode_verifier4(argp, &exid->verifier);
 	if (status)
 		return status;
@@ -1635,6 +1660,7 @@ nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
 {
 	__be32 status;
 
+	memset(sess, 0, sizeof(*sess));
 	status = nfsd4_decode_clientid4(argp, &sess->clientid);
 	if (status)
 		return status;
@@ -1650,11 +1676,7 @@ nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
 		return status;
 	if (xdr_stream_decode_u32(argp->xdr, &sess->callback_prog) < 0)
 		return nfserr_bad_xdr;
-	status = nfsd4_decode_cb_sec(argp, &sess->cb_sec);
-	if (status)
-		return status;
-
-	return nfs_ok;
+	return nfsd4_decode_cb_sec(argp, &sess->cb_sec);
 }
 
 static __be32
@@ -1678,6 +1700,7 @@ nfsd4_decode_getdeviceinfo(struct nfsd4_compoundargs *argp,
 {
 	__be32 status;
 
+	memset(gdev, 0, sizeof(*gdev));
 	status = nfsd4_decode_deviceid4(argp, &gdev->gd_devid);
 	if (status)
 		return status;
@@ -1698,6 +1721,7 @@ nfsd4_decode_layoutcommit(struct nfsd4_compoundargs *argp,
 {
 	__be32 *p, status;
 
+	memset(lcp, 0, sizeof(*lcp));
 	if (xdr_stream_decode_u64(argp->xdr, &lcp->lc_seg.offset) < 0)
 		return nfserr_bad_xdr;
 	if (xdr_stream_decode_u64(argp->xdr, &lcp->lc_seg.length) < 0)
@@ -1733,6 +1757,7 @@ nfsd4_decode_layoutget(struct nfsd4_compoundargs *argp,
 {
 	__be32 status;
 
+	memset(lgp, 0, sizeof(*lgp));
 	if (xdr_stream_decode_u32(argp->xdr, &lgp->lg_signal) < 0)
 		return nfserr_bad_xdr;
 	if (xdr_stream_decode_u32(argp->xdr, &lgp->lg_layout_type) < 0)
@@ -1758,6 +1783,7 @@ static __be32
 nfsd4_decode_layoutreturn(struct nfsd4_compoundargs *argp,
 		struct nfsd4_layoutreturn *lrp)
 {
+	memset(lrp, 0, sizeof(*lrp));
 	if (xdr_stream_decode_bool(argp->xdr, &lrp->lr_reclaim) < 0)
 		return nfserr_bad_xdr;
 	if (xdr_stream_decode_u32(argp->xdr, &lrp->lr_layout_type) < 0)
@@ -1773,6 +1799,8 @@ static __be32 nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp,
 {
 	if (xdr_stream_decode_u32(argp->xdr, &sin->sin_style) < 0)
 		return nfserr_bad_xdr;
+
+	sin->sin_exp = NULL;
 	return nfs_ok;
 }
 
@@ -1793,6 +1821,7 @@ nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
 	seq->maxslots = be32_to_cpup(p++);
 	seq->cachethis = be32_to_cpup(p);
 
+	seq->status_flags = 0;
 	return nfs_ok;
 }
 
@@ -1803,6 +1832,7 @@ nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_sta
 	__be32 status;
 	u32 i;
 
+	memset(test_stateid, 0, sizeof(*test_stateid));
 	if (xdr_stream_decode_u32(argp->xdr, &test_stateid->ts_num_ids) < 0)
 		return nfserr_bad_xdr;
 
@@ -1900,6 +1930,7 @@ nfsd4_decode_copy(struct nfsd4_compoundargs *argp, struct nfsd4_copy *copy)
 	struct nl4_server *ns_dummy;
 	__be32 status;
 
+	memset(copy, 0, sizeof(*copy));
 	status = nfsd4_decode_stateid4(argp, &copy->cp_src_stateid);
 	if (status)
 		return status;
@@ -1955,6 +1986,7 @@ nfsd4_decode_copy_notify(struct nfsd4_compoundargs *argp,
 {
 	__be32 status;
 
+	memset(cn, 0, sizeof(*cn));
 	cn->cpn_src = svcxdr_tmpalloc(argp, sizeof(*cn->cpn_src));
 	if (cn->cpn_src == NULL)
 		return nfserr_jukebox;
@@ -1972,6 +2004,8 @@ static __be32
 nfsd4_decode_offload_status(struct nfsd4_compoundargs *argp,
 			    struct nfsd4_offload_status *os)
 {
+	os->count = 0;
+	os->status = 0;
 	return nfsd4_decode_stateid4(argp, &os->stateid);
 }
 
@@ -1988,6 +2022,8 @@ nfsd4_decode_seek(struct nfsd4_compoundargs *argp, struct nfsd4_seek *seek)
 	if (xdr_stream_decode_u32(argp->xdr, &seek->seek_whence) < 0)
 		return nfserr_bad_xdr;
 
+	seek->seek_eof = 0;
+	seek->seek_pos = 0;
 	return nfs_ok;
 }
 
@@ -2123,6 +2159,7 @@ nfsd4_decode_getxattr(struct nfsd4_compoundargs *argp,
 	__be32 status;
 	u32 maxcount;
 
+	memset(getxattr, 0, sizeof(*getxattr));
 	status = nfsd4_decode_xattr_name(argp, &getxattr->getxa_name);
 	if (status)
 		return status;
@@ -2131,8 +2168,7 @@ nfsd4_decode_getxattr(struct nfsd4_compoundargs *argp,
 	maxcount = min_t(u32, XATTR_SIZE_MAX, maxcount);
 
 	getxattr->getxa_len = maxcount;
-
-	return status;
+	return nfs_ok;
 }
 
 static __be32
@@ -2142,6 +2178,8 @@ nfsd4_decode_setxattr(struct nfsd4_compoundargs *argp,
 	u32 flags, maxcount, size;
 	__be32 status;
 
+	memset(setxattr, 0, sizeof(*setxattr));
+
 	if (xdr_stream_decode_u32(argp->xdr, &flags) < 0)
 		return nfserr_bad_xdr;
 
@@ -2180,6 +2218,8 @@ nfsd4_decode_listxattrs(struct nfsd4_compoundargs *argp,
 {
 	u32 maxcount;
 
+	memset(listxattrs, 0, sizeof(*listxattrs));
+
 	if (xdr_stream_decode_u64(argp->xdr, &listxattrs->lsxa_cookie) < 0)
 		return nfserr_bad_xdr;
 
@@ -2207,6 +2247,7 @@ static __be32
 nfsd4_decode_removexattr(struct nfsd4_compoundargs *argp,
 			 struct nfsd4_removexattr *removexattr)
 {
+	memset(removexattr, 0, sizeof(*removexattr));
 	return nfsd4_decode_xattr_name(argp, &removexattr->rmxa_name);
 }
 
@@ -2357,22 +2398,15 @@ nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
 
 	if (xdr_stream_decode_u32(argp->xdr, &argp->minorversion) < 0)
 		return false;
-	if (xdr_stream_decode_u32(argp->xdr, &argp->opcnt) < 0)
+	if (xdr_stream_decode_u32(argp->xdr, &argp->client_opcnt) < 0)
 		return false;
-
-	/*
-	 * NFS4ERR_RESOURCE is a more helpful error than GARBAGE_ARGS
-	 * here, so we return success at the xdr level so that
-	 * nfsd4_proc can handle this is an NFS-level error.
-	 */
-	if (argp->opcnt > NFSD_MAX_OPS_PER_COMPOUND)
-		return true;
+	argp->opcnt = min_t(u32, argp->client_opcnt,
+			    NFSD_MAX_OPS_PER_COMPOUND);
 
 	if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
-		argp->ops = kzalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
+		argp->ops = vcalloc(argp->opcnt, sizeof(*argp->ops));
 		if (!argp->ops) {
 			argp->ops = argp->iops;
-			dprintk("nfsd: couldn't allocate room for COMPOUND\n");
 			return false;
 		}
 	}
@@ -2774,9 +2808,10 @@ static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *bmval2, u32
 }
 
 
-static int get_parent_attributes(struct svc_export *exp, struct kstat *stat)
+static int nfsd4_get_mounted_on_ino(struct svc_export *exp, u64 *pino)
 {
 	struct path path = exp->ex_path;
+	struct kstat stat;
 	int err;
 
 	path_get(&path);
@@ -2784,8 +2819,10 @@ static int get_parent_attributes(struct svc_export *exp, struct kstat *stat)
 		if (path.dentry != path.mnt->mnt_root)
 			break;
 	}
-	err = vfs_getattr(&path, stat, STATX_BASIC_STATS, AT_STATX_SYNC_AS_STAT);
+	err = vfs_getattr(&path, &stat, STATX_INO, AT_STATX_SYNC_AS_STAT);
 	path_put(&path);
+	if (!err)
+		*pino = stat.ino;
 	return err;
 }
 
@@ -3282,22 +3319,21 @@ out_acl:
 		*p++ = cpu_to_be32(stat.btime.tv_nsec);
 	}
 	if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
-		struct kstat parent_stat;
 		u64 ino = stat.ino;
 
 		p = xdr_reserve_space(xdr, 8);
 		if (!p)
                 	goto out_resource;
 		/*
-		 * Get parent's attributes if not ignoring crossmount
-		 * and this is the root of a cross-mounted filesystem.
+		 * Get ino of mountpoint in parent filesystem, if not ignoring
+		 * crossmount and this is the root of a cross-mounted
+		 * filesystem.
 		 */
 		if (ignore_crossmnt == 0 &&
 		    dentry == exp->ex_path.mnt->mnt_root) {
-			err = get_parent_attributes(exp, &parent_stat);
+			err = nfsd4_get_mounted_on_ino(exp, &ino);
 			if (err)
 				goto out_nfserr;
-			ino = parent_stat.ino;
 		}
 		p = xdr_encode_hyper(p, ino);
 	}
@@ -3994,7 +4030,7 @@ nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
 	}
 	if (resp->xdr->buf->page_len && splice_ok) {
 		WARN_ON_ONCE(1);
-		return nfserr_resource;
+		return nfserr_serverfault;
 	}
 	xdr_commit_encode(xdr);
 
@@ -5394,7 +5430,7 @@ void nfsd4_release_compoundargs(struct svc_rqst *rqstp)
 	struct nfsd4_compoundargs *args = rqstp->rq_argp;
 
 	if (args->ops != args->iops) {
-		kfree(args->ops);
+		vfree(args->ops);
 		args->ops = args->iops;
 	}
 	while (args->to_free) {
@@ -5423,12 +5459,8 @@ bool
 nfs4svc_encode_compoundres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
 {
 	struct nfsd4_compoundres *resp = rqstp->rq_resp;
-	struct xdr_buf *buf = xdr->buf;
 	__be32 *p;
 
-	WARN_ON_ONCE(buf->len != buf->head[0].iov_len + buf->page_len +
-				 buf->tail[0].iov_len);
-
 	/*
 	 * Send buffer space for the following items is reserved
 	 * at the top of nfsd4_proc_compound().
diff --git a/fs/nfsd/nfscache.c b/fs/nfsd/nfscache.c
index 9b31e1103e7b..3e64a3d50a1c 100644
--- a/fs/nfsd/nfscache.c
+++ b/fs/nfsd/nfscache.c
@@ -604,9 +604,10 @@ nfsd_cache_append(struct svc_rqst *rqstp, struct kvec *data)
  * scraping this file for info should test the labels to ensure they're
  * getting the correct field.
  */
-static int nfsd_reply_cache_stats_show(struct seq_file *m, void *v)
+int nfsd_reply_cache_stats_show(struct seq_file *m, void *v)
 {
-	struct nfsd_net *nn = m->private;
+	struct nfsd_net *nn = net_generic(file_inode(m->file)->i_sb->s_fs_info,
+					  nfsd_net_id);
 
 	seq_printf(m, "max entries:           %u\n", nn->max_drc_entries);
 	seq_printf(m, "num entries:           %u\n",
@@ -626,11 +627,3 @@ static int nfsd_reply_cache_stats_show(struct seq_file *m, void *v)
 	seq_printf(m, "cachesize at longest:  %u\n", nn->longest_chain_cachesize);
 	return 0;
 }
-
-int nfsd_reply_cache_stats_open(struct inode *inode, struct file *file)
-{
-	struct nfsd_net *nn = net_generic(file_inode(file)->i_sb->s_fs_info,
-								nfsd_net_id);
-
-	return single_open(file, nfsd_reply_cache_stats_show, nn);
-}
diff --git a/fs/nfsd/nfsctl.c b/fs/nfsd/nfsctl.c
index 917fa1892fd2..6a29bcfc9390 100644
--- a/fs/nfsd/nfsctl.c
+++ b/fs/nfsd/nfsctl.c
@@ -185,17 +185,7 @@ static int export_features_show(struct seq_file *m, void *v)
 	return 0;
 }
 
-static int export_features_open(struct inode *inode, struct file *file)
-{
-	return single_open(file, export_features_show, NULL);
-}
-
-static const struct file_operations export_features_operations = {
-	.open		= export_features_open,
-	.read		= seq_read,
-	.llseek		= seq_lseek,
-	.release	= single_release,
-};
+DEFINE_SHOW_ATTRIBUTE(export_features);
 
 #if defined(CONFIG_SUNRPC_GSS) || defined(CONFIG_SUNRPC_GSS_MODULE)
 static int supported_enctypes_show(struct seq_file *m, void *v)
@@ -204,17 +194,7 @@ static int supported_enctypes_show(struct seq_file *m, void *v)
 	return 0;
 }
 
-static int supported_enctypes_open(struct inode *inode, struct file *file)
-{
-	return single_open(file, supported_enctypes_show, NULL);
-}
-
-static const struct file_operations supported_enctypes_ops = {
-	.open		= supported_enctypes_open,
-	.read		= seq_read,
-	.llseek		= seq_lseek,
-	.release	= single_release,
-};
+DEFINE_SHOW_ATTRIBUTE(supported_enctypes);
 #endif /* CONFIG_SUNRPC_GSS or CONFIG_SUNRPC_GSS_MODULE */
 
 static const struct file_operations pool_stats_operations = {
@@ -224,19 +204,9 @@ static const struct file_operations pool_stats_operations = {
 	.release	= nfsd_pool_stats_release,
 };
 
-static const struct file_operations reply_cache_stats_operations = {
-	.open		= nfsd_reply_cache_stats_open,
-	.read		= seq_read,
-	.llseek		= seq_lseek,
-	.release	= single_release,
-};
+DEFINE_SHOW_ATTRIBUTE(nfsd_reply_cache_stats);
 
-static const struct file_operations filecache_ops = {
-	.open		= nfsd_file_cache_stats_open,
-	.read		= seq_read,
-	.llseek		= seq_lseek,
-	.release	= single_release,
-};
+DEFINE_SHOW_ATTRIBUTE(nfsd_file_cache_stats);
 
 /*----------------------------------------------------------------------------*/
 /*
@@ -1365,7 +1335,7 @@ static int nfsd_fill_super(struct super_block *sb, struct fs_context *fc)
 		/* Per-export io stats use same ops as exports file */
 		[NFSD_Export_Stats] = {"export_stats", &exports_nfsd_operations, S_IRUGO},
 		[NFSD_Export_features] = {"export_features",
-					&export_features_operations, S_IRUGO},
+					&export_features_fops, S_IRUGO},
 		[NFSD_FO_UnlockIP] = {"unlock_ip",
 					&transaction_ops, S_IWUSR|S_IRUSR},
 		[NFSD_FO_UnlockFS] = {"unlock_filesystem",
@@ -1374,14 +1344,16 @@ static int nfsd_fill_super(struct super_block *sb, struct fs_context *fc)
 		[NFSD_Threads] = {"threads", &transaction_ops, S_IWUSR|S_IRUSR},
 		[NFSD_Pool_Threads] = {"pool_threads", &transaction_ops, S_IWUSR|S_IRUSR},
 		[NFSD_Pool_Stats] = {"pool_stats", &pool_stats_operations, S_IRUGO},
-		[NFSD_Reply_Cache_Stats] = {"reply_cache_stats", &reply_cache_stats_operations, S_IRUGO},
+		[NFSD_Reply_Cache_Stats] = {"reply_cache_stats",
+					&nfsd_reply_cache_stats_fops, S_IRUGO},
 		[NFSD_Versions] = {"versions", &transaction_ops, S_IWUSR|S_IRUSR},
 		[NFSD_Ports] = {"portlist", &transaction_ops, S_IWUSR|S_IRUGO},
 		[NFSD_MaxBlkSize] = {"max_block_size", &transaction_ops, S_IWUSR|S_IRUGO},
 		[NFSD_MaxConnections] = {"max_connections", &transaction_ops, S_IWUSR|S_IRUGO},
-		[NFSD_Filecache] = {"filecache", &filecache_ops, S_IRUGO},
+		[NFSD_Filecache] = {"filecache", &nfsd_file_cache_stats_fops, S_IRUGO},
 #if defined(CONFIG_SUNRPC_GSS) || defined(CONFIG_SUNRPC_GSS_MODULE)
-		[NFSD_SupportedEnctypes] = {"supported_krb5_enctypes", &supported_enctypes_ops, S_IRUGO},
+		[NFSD_SupportedEnctypes] = {"supported_krb5_enctypes",
+					&supported_enctypes_fops, S_IRUGO},
 #endif /* CONFIG_SUNRPC_GSS or CONFIG_SUNRPC_GSS_MODULE */
 #ifdef CONFIG_NFSD_V4
 		[NFSD_Leasetime] = {"nfsv4leasetime", &transaction_ops, S_IWUSR|S_IRUSR},
@@ -1481,11 +1453,12 @@ static __net_init int nfsd_init_net(struct net *net)
 		goto out_idmap_error;
 	nn->nfsd_versions = NULL;
 	nn->nfsd4_minorversions = NULL;
+	retval = nfsd4_init_leases_net(nn);
+	if (retval)
+		goto out_drc_error;
 	retval = nfsd_reply_cache_init(nn);
 	if (retval)
 		goto out_drc_error;
-	nfsd4_init_leases_net(nn);
-
 	get_random_bytes(&nn->siphash_key, sizeof(nn->siphash_key));
 	seqlock_init(&nn->writeverf_lock);
 
@@ -1507,6 +1480,7 @@ static __net_exit void nfsd_exit_net(struct net *net)
 	nfsd_idmap_shutdown(net);
 	nfsd_export_shutdown(net);
 	nfsd_netns_free_versions(net_generic(net, nfsd_net_id));
+	nfsd4_leases_net_shutdown(nn);
 }
 
 static struct pernet_operations nfsd_net_ops = {
diff --git a/fs/nfsd/nfsd.h b/fs/nfsd/nfsd.h
index 57a468ed85c3..09726c5b9a31 100644
--- a/fs/nfsd/nfsd.h
+++ b/fs/nfsd/nfsd.h
@@ -164,6 +164,7 @@ char * nfs4_recoverydir(void);
 bool nfsd4_spo_must_allow(struct svc_rqst *rqstp);
 int nfsd4_create_laundry_wq(void);
 void nfsd4_destroy_laundry_wq(void);
+bool nfsd_wait_for_delegreturn(struct svc_rqst *rqstp, struct inode *inode);
 #else
 static inline int nfsd4_init_slabs(void) { return 0; }
 static inline void nfsd4_free_slabs(void) { }
@@ -179,6 +180,11 @@ static inline bool nfsd4_spo_must_allow(struct svc_rqst *rqstp)
 }
 static inline int nfsd4_create_laundry_wq(void) { return 0; };
 static inline void nfsd4_destroy_laundry_wq(void) {};
+static inline bool nfsd_wait_for_delegreturn(struct svc_rqst *rqstp,
+					      struct inode *inode)
+{
+	return false;
+}
 #endif
 
 /*
@@ -343,6 +349,7 @@ void		nfsd_lockd_shutdown(void);
 #define	NFSD_COURTESY_CLIENT_TIMEOUT	(24 * 60 * 60)	/* seconds */
 #define	NFSD_CLIENT_MAX_TRIM_PER_RUN	128
 #define	NFS4_CLIENTS_PER_GB		1024
+#define NFSD_DELEGRETURN_TIMEOUT	(HZ / 34)	/* 30ms */
 
 /*
  * The following attributes are currently not supported by the NFSv4 server:
@@ -498,7 +505,8 @@ extern void unregister_cld_notifier(void);
 extern void nfsd4_ssc_init_umount_work(struct nfsd_net *nn);
 #endif
 
-extern void nfsd4_init_leases_net(struct nfsd_net *nn);
+extern int nfsd4_init_leases_net(struct nfsd_net *nn);
+extern void nfsd4_leases_net_shutdown(struct nfsd_net *nn);
 
 #else /* CONFIG_NFSD_V4 */
 static inline int nfsd4_is_junction(struct dentry *dentry)
@@ -506,7 +514,8 @@ static inline int nfsd4_is_junction(struct dentry *dentry)
 	return 0;
 }
 
-static inline void nfsd4_init_leases_net(struct nfsd_net *nn) {};
+static inline int nfsd4_init_leases_net(struct nfsd_net *nn) { return 0; };
+static inline void nfsd4_leases_net_shutdown(struct nfsd_net *nn) {};
 
 #define register_cld_notifier() 0
 #define unregister_cld_notifier() do { } while(0)
diff --git a/fs/nfsd/nfsfh.c b/fs/nfsd/nfsfh.c
index a5b71526cee0..d73434200df9 100644
--- a/fs/nfsd/nfsfh.c
+++ b/fs/nfsd/nfsfh.c
@@ -392,13 +392,7 @@ fh_verify(struct svc_rqst *rqstp, struct svc_fh *fhp, umode_t type, int access)
 skip_pseudoflavor_check:
 	/* Finally, check access permissions. */
 	error = nfsd_permission(rqstp, exp, dentry, access);
-
-	if (error) {
-		dprintk("fh_verify: %pd2 permission failure, "
-			"acc=%x, error=%d\n",
-			dentry,
-			access, ntohl(error));
-	}
+	trace_nfsd_fh_verify_err(rqstp, fhp, type, access, error);
 out:
 	if (error == nfserr_stale)
 		nfsd_stats_fh_stale_inc(exp);
diff --git a/fs/nfsd/nfsproc.c b/fs/nfsd/nfsproc.c
index 7381972f1677..82b3ddeacc33 100644
--- a/fs/nfsd/nfsproc.c
+++ b/fs/nfsd/nfsproc.c
@@ -185,6 +185,7 @@ nfsd_proc_read(struct svc_rqst *rqstp)
 		argp->count, argp->offset);
 
 	argp->count = min_t(u32, argp->count, NFSSVC_MAXBLKSIZE_V2);
+	argp->count = min_t(u32, argp->count, rqstp->rq_res.buflen);
 
 	v = 0;
 	len = argp->count;
@@ -390,9 +391,8 @@ nfsd_proc_create(struct svc_rqst *rqstp)
 	resp->status = nfs_ok;
 	if (!inode) {
 		/* File doesn't exist. Create it and set attrs */
-		resp->status = nfsd_create_locked(rqstp, dirfhp, argp->name,
-						  argp->len, &attrs, type, rdev,
-						  newfhp);
+		resp->status = nfsd_create_locked(rqstp, dirfhp, &attrs, type,
+						  rdev, newfhp);
 	} else if (type == S_IFREG) {
 		dprintk("nfsd:   existing %s, valid=%x, size=%ld\n",
 			argp->name, attr->ia_valid, (long) attr->ia_size);
@@ -567,24 +567,15 @@ static void nfsd_init_dirlist_pages(struct svc_rqst *rqstp,
 	struct xdr_buf *buf = &resp->dirlist;
 	struct xdr_stream *xdr = &resp->xdr;
 
-	count = clamp(count, (u32)(XDR_UNIT * 2), svc_max_payload(rqstp));
-
 	memset(buf, 0, sizeof(*buf));
 
 	/* Reserve room for the NULL ptr & eof flag (-2 words) */
-	buf->buflen = count - XDR_UNIT * 2;
+	buf->buflen = clamp(count, (u32)(XDR_UNIT * 2), (u32)PAGE_SIZE);
+	buf->buflen -= XDR_UNIT * 2;
 	buf->pages = rqstp->rq_next_page;
 	rqstp->rq_next_page++;
 
-	/* This is xdr_init_encode(), but it assumes that
-	 * the head kvec has already been consumed. */
-	xdr_set_scratch_buffer(xdr, NULL, 0);
-	xdr->buf = buf;
-	xdr->page_ptr = buf->pages;
-	xdr->iov = NULL;
-	xdr->p = page_address(*buf->pages);
-	xdr->end = (void *)xdr->p + min_t(u32, buf->buflen, PAGE_SIZE);
-	xdr->rqst = NULL;
+	xdr_init_encode_pages(xdr, buf, buf->pages,  NULL);
 }
 
 /*
@@ -646,6 +637,7 @@ static const struct svc_procedure nfsd_procedures2[18] = {
 		.pc_decode = nfssvc_decode_voidarg,
 		.pc_encode = nfssvc_encode_voidres,
 		.pc_argsize = sizeof(struct nfsd_voidargs),
+		.pc_argzero = sizeof(struct nfsd_voidargs),
 		.pc_ressize = sizeof(struct nfsd_voidres),
 		.pc_cachetype = RC_NOCACHE,
 		.pc_xdrressize = 0,
@@ -657,6 +649,7 @@ static const struct svc_procedure nfsd_procedures2[18] = {
 		.pc_encode = nfssvc_encode_attrstatres,
 		.pc_release = nfssvc_release_attrstat,
 		.pc_argsize = sizeof(struct nfsd_fhandle),
+		.pc_argzero = sizeof(struct nfsd_fhandle),
 		.pc_ressize = sizeof(struct nfsd_attrstat),
 		.pc_cachetype = RC_NOCACHE,
 		.pc_xdrressize = ST+AT,
@@ -668,6 +661,7 @@ static const struct svc_procedure nfsd_procedures2[18] = {
 		.pc_encode = nfssvc_encode_attrstatres,
 		.pc_release = nfssvc_release_attrstat,
 		.pc_argsize = sizeof(struct nfsd_sattrargs),
+		.pc_argzero = sizeof(struct nfsd_sattrargs),
 		.pc_ressize = sizeof(struct nfsd_attrstat),
 		.pc_cachetype = RC_REPLBUFF,
 		.pc_xdrressize = ST+AT,
@@ -678,6 +672,7 @@ static const struct svc_procedure nfsd_procedures2[18] = {
 		.pc_decode = nfssvc_decode_voidarg,
 		.pc_encode = nfssvc_encode_voidres,
 		.pc_argsize = sizeof(struct nfsd_voidargs),
+		.pc_argzero = sizeof(struct nfsd_voidargs),
 		.pc_ressize = sizeof(struct nfsd_voidres),
 		.pc_cachetype = RC_NOCACHE,
 		.pc_xdrressize = 0,
@@ -689,6 +684,7 @@ static const struct svc_procedure nfsd_procedures2[18] = {
 		.pc_encode = nfssvc_encode_diropres,
 		.pc_release = nfssvc_release_diropres,
 		.pc_argsize = sizeof(struct nfsd_diropargs),
+		.pc_argzero = sizeof(struct nfsd_diropargs),
 		.pc_ressize = sizeof(struct nfsd_diropres),
 		.pc_cachetype = RC_NOCACHE,
 		.pc_xdrressize = ST+FH+AT,
@@ -699,6 +695,7 @@ static const struct svc_procedure nfsd_procedures2[18] = {
 		.pc_decode = nfssvc_decode_fhandleargs,
 		.pc_encode = nfssvc_encode_readlinkres,
 		.pc_argsize = sizeof(struct nfsd_fhandle),
+		.pc_argzero = sizeof(struct nfsd_fhandle),
 		.pc_ressize = sizeof(struct nfsd_readlinkres),
 		.pc_cachetype = RC_NOCACHE,
 		.pc_xdrressize = ST+1+NFS_MAXPATHLEN/4,
@@ -710,6 +707,7 @@ static const struct svc_procedure nfsd_procedures2[18] = {
 		.pc_encode = nfssvc_encode_readres,
 		.pc_release = nfssvc_release_readres,
 		.pc_argsize = sizeof(struct nfsd_readargs),
+		.pc_argzero = sizeof(struct nfsd_readargs),
 		.pc_ressize = sizeof(struct nfsd_readres),
 		.pc_cachetype = RC_NOCACHE,
 		.pc_xdrressize = ST+AT+1+NFSSVC_MAXBLKSIZE_V2/4,
@@ -720,6 +718,7 @@ static const struct svc_procedure nfsd_procedures2[18] = {
 		.pc_decode = nfssvc_decode_voidarg,
 		.pc_encode = nfssvc_encode_voidres,
 		.pc_argsize = sizeof(struct nfsd_voidargs),
+		.pc_argzero = sizeof(struct nfsd_voidargs),
 		.pc_ressize = sizeof(struct nfsd_voidres),
 		.pc_cachetype = RC_NOCACHE,
 		.pc_xdrressize = 0,
@@ -731,6 +730,7 @@ static const struct svc_procedure nfsd_procedures2[18] = {
 		.pc_encode = nfssvc_encode_attrstatres,
 		.pc_release = nfssvc_release_attrstat,
 		.pc_argsize = sizeof(struct nfsd_writeargs),
+		.pc_argzero = sizeof(struct nfsd_writeargs),
 		.pc_ressize = sizeof(struct nfsd_attrstat),
 		.pc_cachetype = RC_REPLBUFF,
 		.pc_xdrressize = ST+AT,
@@ -742,6 +742,7 @@ static const struct svc_procedure nfsd_procedures2[18] = {
 		.pc_encode = nfssvc_encode_diropres,
 		.pc_release = nfssvc_release_diropres,
 		.pc_argsize = sizeof(struct nfsd_createargs),
+		.pc_argzero = sizeof(struct nfsd_createargs),
 		.pc_ressize = sizeof(struct nfsd_diropres),
 		.pc_cachetype = RC_REPLBUFF,
 		.pc_xdrressize = ST+FH+AT,
@@ -752,6 +753,7 @@ static const struct svc_procedure nfsd_procedures2[18] = {
 		.pc_decode = nfssvc_decode_diropargs,
 		.pc_encode = nfssvc_encode_statres,
 		.pc_argsize = sizeof(struct nfsd_diropargs),
+		.pc_argzero = sizeof(struct nfsd_diropargs),
 		.pc_ressize = sizeof(struct nfsd_stat),
 		.pc_cachetype = RC_REPLSTAT,
 		.pc_xdrressize = ST,
@@ -762,6 +764,7 @@ static const struct svc_procedure nfsd_procedures2[18] = {
 		.pc_decode = nfssvc_decode_renameargs,
 		.pc_encode = nfssvc_encode_statres,
 		.pc_argsize = sizeof(struct nfsd_renameargs),
+		.pc_argzero = sizeof(struct nfsd_renameargs),
 		.pc_ressize = sizeof(struct nfsd_stat),
 		.pc_cachetype = RC_REPLSTAT,
 		.pc_xdrressize = ST,
@@ -772,6 +775,7 @@ static const struct svc_procedure nfsd_procedures2[18] = {
 		.pc_decode = nfssvc_decode_linkargs,
 		.pc_encode = nfssvc_encode_statres,
 		.pc_argsize = sizeof(struct nfsd_linkargs),
+		.pc_argzero = sizeof(struct nfsd_linkargs),
 		.pc_ressize = sizeof(struct nfsd_stat),
 		.pc_cachetype = RC_REPLSTAT,
 		.pc_xdrressize = ST,
@@ -782,6 +786,7 @@ static const struct svc_procedure nfsd_procedures2[18] = {
 		.pc_decode = nfssvc_decode_symlinkargs,
 		.pc_encode = nfssvc_encode_statres,
 		.pc_argsize = sizeof(struct nfsd_symlinkargs),
+		.pc_argzero = sizeof(struct nfsd_symlinkargs),
 		.pc_ressize = sizeof(struct nfsd_stat),
 		.pc_cachetype = RC_REPLSTAT,
 		.pc_xdrressize = ST,
@@ -793,6 +798,7 @@ static const struct svc_procedure nfsd_procedures2[18] = {
 		.pc_encode = nfssvc_encode_diropres,
 		.pc_release = nfssvc_release_diropres,
 		.pc_argsize = sizeof(struct nfsd_createargs),
+		.pc_argzero = sizeof(struct nfsd_createargs),
 		.pc_ressize = sizeof(struct nfsd_diropres),
 		.pc_cachetype = RC_REPLBUFF,
 		.pc_xdrressize = ST+FH+AT,
@@ -803,6 +809,7 @@ static const struct svc_procedure nfsd_procedures2[18] = {
 		.pc_decode = nfssvc_decode_diropargs,
 		.pc_encode = nfssvc_encode_statres,
 		.pc_argsize = sizeof(struct nfsd_diropargs),
+		.pc_argzero = sizeof(struct nfsd_diropargs),
 		.pc_ressize = sizeof(struct nfsd_stat),
 		.pc_cachetype = RC_REPLSTAT,
 		.pc_xdrressize = ST,
@@ -813,6 +820,7 @@ static const struct svc_procedure nfsd_procedures2[18] = {
 		.pc_decode = nfssvc_decode_readdirargs,
 		.pc_encode = nfssvc_encode_readdirres,
 		.pc_argsize = sizeof(struct nfsd_readdirargs),
+		.pc_argzero = sizeof(struct nfsd_readdirargs),
 		.pc_ressize = sizeof(struct nfsd_readdirres),
 		.pc_cachetype = RC_NOCACHE,
 		.pc_name = "READDIR",
@@ -822,6 +830,7 @@ static const struct svc_procedure nfsd_procedures2[18] = {
 		.pc_decode = nfssvc_decode_fhandleargs,
 		.pc_encode = nfssvc_encode_statfsres,
 		.pc_argsize = sizeof(struct nfsd_fhandle),
+		.pc_argzero = sizeof(struct nfsd_fhandle),
 		.pc_ressize = sizeof(struct nfsd_statfsres),
 		.pc_cachetype = RC_NOCACHE,
 		.pc_xdrressize = ST+5,
diff --git a/fs/nfsd/nfssvc.c b/fs/nfsd/nfssvc.c
index 4bb5baa17040..bfbd9f672f59 100644
--- a/fs/nfsd/nfssvc.c
+++ b/fs/nfsd/nfssvc.c
@@ -799,7 +799,7 @@ nfsd_svc(int nrservs, struct net *net, const struct cred *cred)
 	if (nrservs == 0 && nn->nfsd_serv == NULL)
 		goto out;
 
-	strlcpy(nn->nfsd_name, utsname()->nodename,
+	strscpy(nn->nfsd_name, utsname()->nodename,
 		sizeof(nn->nfsd_name));
 
 	error = nfsd_create_serv(net);
diff --git a/fs/nfsd/nfsxdr.c b/fs/nfsd/nfsxdr.c
index aba8520b4b8b..caf6355b18fa 100644
--- a/fs/nfsd/nfsxdr.c
+++ b/fs/nfsd/nfsxdr.c
@@ -338,10 +338,8 @@ nfssvc_decode_writeargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
 		return false;
 	if (args->len > NFSSVC_MAXBLKSIZE_V2)
 		return false;
-	if (!xdr_stream_subsegment(xdr, &args->payload, args->len))
-		return false;
 
-	return true;
+	return xdr_stream_subsegment(xdr, &args->payload, args->len);
 }
 
 bool
diff --git a/fs/nfsd/state.h b/fs/nfsd/state.h
index ae596dbf8667..e2daef3cc003 100644
--- a/fs/nfsd/state.h
+++ b/fs/nfsd/state.h
@@ -57,11 +57,11 @@ typedef struct {
 } stateid_t;
 
 typedef struct {
-	stateid_t		stid;
+	stateid_t		cs_stid;
 #define NFS4_COPY_STID 1
 #define NFS4_COPYNOTIFY_STID 2
-	unsigned char		sc_type;
-	refcount_t		sc_count;
+	unsigned char		cs_type;
+	refcount_t		cs_count;
 } copy_stateid_t;
 
 struct nfsd4_callback {
@@ -175,7 +175,7 @@ static inline struct nfs4_delegation *delegstateid(struct nfs4_stid *s)
 /* Maximum number of slots per session. 160 is useful for long haul TCP */
 #define NFSD_MAX_SLOTS_PER_SESSION     160
 /* Maximum number of operations per session compound */
-#define NFSD_MAX_OPS_PER_COMPOUND	16
+#define NFSD_MAX_OPS_PER_COMPOUND	50
 /* Maximum  session per slot cache size */
 #define NFSD_SLOT_CACHE_SIZE		2048
 /* Maximum number of NFSD_SLOT_CACHE_SIZE slots per session */
@@ -692,12 +692,11 @@ extern void nfsd4_probe_callback_sync(struct nfs4_client *clp);
 extern void nfsd4_change_callback(struct nfs4_client *clp, struct nfs4_cb_conn *);
 extern void nfsd4_init_cb(struct nfsd4_callback *cb, struct nfs4_client *clp,
 		const struct nfsd4_callback_ops *ops, enum nfsd4_cb_op op);
-extern void nfsd4_run_cb(struct nfsd4_callback *cb);
+extern bool nfsd4_run_cb(struct nfsd4_callback *cb);
 extern int nfsd4_create_callback_queue(void);
 extern void nfsd4_destroy_callback_queue(void);
 extern void nfsd4_shutdown_callback(struct nfs4_client *);
 extern void nfsd4_shutdown_copy(struct nfs4_client *clp);
-extern void nfsd4_prepare_cb_recall(struct nfs4_delegation *dp);
 extern struct nfs4_client_reclaim *nfs4_client_to_reclaim(struct xdr_netobj name,
 				struct xdr_netobj princhash, struct nfsd_net *nn);
 extern bool nfs4_has_reclaimed_state(struct xdr_netobj name, struct nfsd_net *nn);
diff --git a/fs/nfsd/stats.c b/fs/nfsd/stats.c
index a8c5a02a84f0..777e24e5da33 100644
--- a/fs/nfsd/stats.c
+++ b/fs/nfsd/stats.c
@@ -32,7 +32,7 @@ struct svc_stat		nfsd_svcstats = {
 	.program	= &nfsd_program,
 };
 
-static int nfsd_proc_show(struct seq_file *seq, void *v)
+static int nfsd_show(struct seq_file *seq, void *v)
 {
 	int i;
 
@@ -72,17 +72,7 @@ static int nfsd_proc_show(struct seq_file *seq, void *v)
 	return 0;
 }
 
-static int nfsd_proc_open(struct inode *inode, struct file *file)
-{
-	return single_open(file, nfsd_proc_show, NULL);
-}
-
-static const struct proc_ops nfsd_proc_ops = {
-	.proc_open	= nfsd_proc_open,
-	.proc_read	= seq_read,
-	.proc_lseek	= seq_lseek,
-	.proc_release	= single_release,
-};
+DEFINE_PROC_SHOW_ATTRIBUTE(nfsd);
 
 int nfsd_percpu_counters_init(struct percpu_counter counters[], int num)
 {
diff --git a/fs/nfsd/trace.h b/fs/nfsd/trace.h
index 9ebd67d461f9..06a96e955bd0 100644
--- a/fs/nfsd/trace.h
+++ b/fs/nfsd/trace.h
@@ -84,19 +84,26 @@ DEFINE_NFSD_XDR_ERR_EVENT(cant_encode);
 		{ NFSD_MAY_64BIT_COOKIE,	"64BIT_COOKIE" })
 
 TRACE_EVENT(nfsd_compound,
-	TP_PROTO(const struct svc_rqst *rqst,
-		 u32 args_opcnt),
-	TP_ARGS(rqst, args_opcnt),
+	TP_PROTO(
+		const struct svc_rqst *rqst,
+		const char *tag,
+		u32 taglen,
+		u32 opcnt
+	),
+	TP_ARGS(rqst, tag, taglen, opcnt),
 	TP_STRUCT__entry(
 		__field(u32, xid)
-		__field(u32, args_opcnt)
+		__field(u32, opcnt)
+		__string_len(tag, tag, taglen)
 	),
 	TP_fast_assign(
 		__entry->xid = be32_to_cpu(rqst->rq_xid);
-		__entry->args_opcnt = args_opcnt;
+		__entry->opcnt = opcnt;
+		__assign_str_len(tag, tag, taglen);
 	),
-	TP_printk("xid=0x%08x opcnt=%u",
-		__entry->xid, __entry->args_opcnt)
+	TP_printk("xid=0x%08x opcnt=%u tag=%s",
+		__entry->xid, __entry->opcnt, __get_str(tag)
+	)
 )
 
 TRACE_EVENT(nfsd_compound_status,
@@ -195,7 +202,7 @@ TRACE_EVENT(nfsd_fh_verify,
 		__sockaddr(client, rqstp->rq_xprt->xpt_remotelen)
 		__field(u32, xid)
 		__field(u32, fh_hash)
-		__field(void *, inode)
+		__field(const void *, inode)
 		__field(unsigned long, type)
 		__field(unsigned long, access)
 	),
@@ -211,13 +218,55 @@ TRACE_EVENT(nfsd_fh_verify,
 		__entry->type = type;
 		__entry->access = access;
 	),
-	TP_printk("xid=0x%08x fh_hash=0x%08x inode=%p type=%s access=%s",
-		__entry->xid, __entry->fh_hash, __entry->inode,
+	TP_printk("xid=0x%08x fh_hash=0x%08x type=%s access=%s",
+		__entry->xid, __entry->fh_hash,
 		show_fs_file_type(__entry->type),
 		show_nfsd_may_flags(__entry->access)
 	)
 );
 
+TRACE_EVENT_CONDITION(nfsd_fh_verify_err,
+	TP_PROTO(
+		const struct svc_rqst *rqstp,
+		const struct svc_fh *fhp,
+		umode_t type,
+		int access,
+		__be32 error
+	),
+	TP_ARGS(rqstp, fhp, type, access, error),
+	TP_CONDITION(error),
+	TP_STRUCT__entry(
+		__field(unsigned int, netns_ino)
+		__sockaddr(server, rqstp->rq_xprt->xpt_remotelen)
+		__sockaddr(client, rqstp->rq_xprt->xpt_remotelen)
+		__field(u32, xid)
+		__field(u32, fh_hash)
+		__field(const void *, inode)
+		__field(unsigned long, type)
+		__field(unsigned long, access)
+		__field(int, error)
+	),
+	TP_fast_assign(
+		__entry->netns_ino = SVC_NET(rqstp)->ns.inum;
+		__assign_sockaddr(server, &rqstp->rq_xprt->xpt_local,
+		       rqstp->rq_xprt->xpt_locallen);
+		__assign_sockaddr(client, &rqstp->rq_xprt->xpt_remote,
+				  rqstp->rq_xprt->xpt_remotelen);
+		__entry->xid = be32_to_cpu(rqstp->rq_xid);
+		__entry->fh_hash = knfsd_fh_hash(&fhp->fh_handle);
+		__entry->inode = d_inode(fhp->fh_dentry);
+		__entry->type = type;
+		__entry->access = access;
+		__entry->error = be32_to_cpu(error);
+	),
+	TP_printk("xid=0x%08x fh_hash=0x%08x type=%s access=%s error=%d",
+		__entry->xid, __entry->fh_hash,
+		show_fs_file_type(__entry->type),
+		show_nfsd_may_flags(__entry->access),
+		__entry->error
+	)
+);
+
 DECLARE_EVENT_CLASS(nfsd_fh_err_class,
 	TP_PROTO(struct svc_rqst *rqstp,
 		 struct svc_fh	*fhp,
@@ -489,6 +538,29 @@ DEFINE_NFSD_COPY_ERR_EVENT(clone_file_range_err);
 #include "filecache.h"
 #include "vfs.h"
 
+TRACE_EVENT(nfsd_delegret_wakeup,
+	TP_PROTO(
+		const struct svc_rqst *rqstp,
+		const struct inode *inode,
+		long timeo
+	),
+	TP_ARGS(rqstp, inode, timeo),
+	TP_STRUCT__entry(
+		__field(u32, xid)
+		__field(const void *, inode)
+		__field(long, timeo)
+	),
+	TP_fast_assign(
+		__entry->xid = be32_to_cpu(rqstp->rq_xid);
+		__entry->inode = inode;
+		__entry->timeo = timeo;
+	),
+	TP_printk("xid=0x%08x inode=%p%s",
+		  __entry->xid, __entry->inode,
+		  __entry->timeo == 0 ? " (timed out)" : ""
+	)
+);
+
 DECLARE_EVENT_CLASS(nfsd_stateid_class,
 	TP_PROTO(stateid_t *stp),
 	TP_ARGS(stp),
@@ -1399,6 +1471,45 @@ TRACE_EVENT(nfsd_cb_offload,
 		__entry->fh_hash, __entry->count, __entry->status)
 );
 
+DECLARE_EVENT_CLASS(nfsd_cb_done_class,
+	TP_PROTO(
+		const stateid_t *stp,
+		const struct rpc_task *task
+	),
+	TP_ARGS(stp, task),
+	TP_STRUCT__entry(
+		__field(u32, cl_boot)
+		__field(u32, cl_id)
+		__field(u32, si_id)
+		__field(u32, si_generation)
+		__field(int, status)
+	),
+	TP_fast_assign(
+		__entry->cl_boot = stp->si_opaque.so_clid.cl_boot;
+		__entry->cl_id = stp->si_opaque.so_clid.cl_id;
+		__entry->si_id = stp->si_opaque.so_id;
+		__entry->si_generation = stp->si_generation;
+		__entry->status = task->tk_status;
+	),
+	TP_printk("client %08x:%08x stateid %08x:%08x status=%d",
+		__entry->cl_boot, __entry->cl_id, __entry->si_id,
+		__entry->si_generation, __entry->status
+	)
+);
+
+#define DEFINE_NFSD_CB_DONE_EVENT(name)			\
+DEFINE_EVENT(nfsd_cb_done_class, name,			\
+	TP_PROTO(					\
+		const stateid_t *stp,			\
+		const struct rpc_task *task		\
+	),						\
+	TP_ARGS(stp, task))
+
+DEFINE_NFSD_CB_DONE_EVENT(nfsd_cb_recall_done);
+DEFINE_NFSD_CB_DONE_EVENT(nfsd_cb_notify_lock_done);
+DEFINE_NFSD_CB_DONE_EVENT(nfsd_cb_layout_done);
+DEFINE_NFSD_CB_DONE_EVENT(nfsd_cb_offload_done);
+
 #endif /* _NFSD_TRACE_H */
 
 #undef TRACE_INCLUDE_PATH
diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c
index fc17b0ac8729..83be89905cbf 100644
--- a/fs/nfsd/vfs.c
+++ b/fs/nfsd/vfs.c
@@ -343,8 +343,61 @@ nfsd_get_write_access(struct svc_rqst *rqstp, struct svc_fh *fhp,
 	return nfserrno(get_write_access(inode));
 }
 
-/*
- * Set various file attributes.  After this call fhp needs an fh_put.
+static int __nfsd_setattr(struct dentry *dentry, struct iattr *iap)
+{
+	int host_err;
+
+	if (iap->ia_valid & ATTR_SIZE) {
+		/*
+		 * RFC5661, Section 18.30.4:
+		 *   Changing the size of a file with SETATTR indirectly
+		 *   changes the time_modify and change attributes.
+		 *
+		 * (and similar for the older RFCs)
+		 */
+		struct iattr size_attr = {
+			.ia_valid	= ATTR_SIZE | ATTR_CTIME | ATTR_MTIME,
+			.ia_size	= iap->ia_size,
+		};
+
+		if (iap->ia_size < 0)
+			return -EFBIG;
+
+		host_err = notify_change(&init_user_ns, dentry, &size_attr, NULL);
+		if (host_err)
+			return host_err;
+		iap->ia_valid &= ~ATTR_SIZE;
+
+		/*
+		 * Avoid the additional setattr call below if the only other
+		 * attribute that the client sends is the mtime, as we update
+		 * it as part of the size change above.
+		 */
+		if ((iap->ia_valid & ~ATTR_MTIME) == 0)
+			return 0;
+	}
+
+	if (!iap->ia_valid)
+		return 0;
+
+	iap->ia_valid |= ATTR_CTIME;
+	return notify_change(&init_user_ns, dentry, iap, NULL);
+}
+
+/**
+ * nfsd_setattr - Set various file attributes.
+ * @rqstp: controlling RPC transaction
+ * @fhp: filehandle of target
+ * @attr: attributes to set
+ * @check_guard: set to 1 if guardtime is a valid timestamp
+ * @guardtime: do not act if ctime.tv_sec does not match this timestamp
+ *
+ * This call may adjust the contents of @attr (in particular, this
+ * call may change the bits in the na_iattr.ia_valid field).
+ *
+ * Returns nfs_ok on success, otherwise an NFS status code is
+ * returned. Caller must release @fhp by calling fh_put in either
+ * case.
  */
 __be32
 nfsd_setattr(struct svc_rqst *rqstp, struct svc_fh *fhp,
@@ -357,9 +410,10 @@ nfsd_setattr(struct svc_rqst *rqstp, struct svc_fh *fhp,
 	int		accmode = NFSD_MAY_SATTR;
 	umode_t		ftype = 0;
 	__be32		err;
-	int		host_err = 0;
+	int		host_err;
 	bool		get_write_count;
 	bool		size_change = (iap->ia_valid & ATTR_SIZE);
+	int		retries;
 
 	if (iap->ia_valid & ATTR_SIZE) {
 		accmode |= NFSD_MAY_WRITE|NFSD_MAY_OWNER_OVERRIDE;
@@ -414,43 +468,13 @@ nfsd_setattr(struct svc_rqst *rqstp, struct svc_fh *fhp,
 	}
 
 	inode_lock(inode);
-	if (size_change) {
-		/*
-		 * RFC5661, Section 18.30.4:
-		 *   Changing the size of a file with SETATTR indirectly
-		 *   changes the time_modify and change attributes.
-		 *
-		 * (and similar for the older RFCs)
-		 */
-		struct iattr size_attr = {
-			.ia_valid	= ATTR_SIZE | ATTR_CTIME | ATTR_MTIME,
-			.ia_size	= iap->ia_size,
-		};
-
-		host_err = -EFBIG;
-		if (iap->ia_size < 0)
-			goto out_unlock;
-
-		host_err = notify_change(&init_user_ns, dentry, &size_attr, NULL);
-		if (host_err)
-			goto out_unlock;
-		iap->ia_valid &= ~ATTR_SIZE;
-
-		/*
-		 * Avoid the additional setattr call below if the only other
-		 * attribute that the client sends is the mtime, as we update
-		 * it as part of the size change above.
-		 */
-		if ((iap->ia_valid & ~ATTR_MTIME) == 0)
-			goto out_unlock;
-	}
-
-	if (iap->ia_valid) {
-		iap->ia_valid |= ATTR_CTIME;
-		host_err = notify_change(&init_user_ns, dentry, iap, NULL);
+	for (retries = 1;;) {
+		host_err = __nfsd_setattr(dentry, iap);
+		if (host_err != -EAGAIN || !retries--)
+			break;
+		if (!nfsd_wait_for_delegreturn(rqstp, inode))
+			break;
 	}
-
-out_unlock:
 	if (attr->na_seclabel && attr->na_seclabel->len)
 		attr->na_labelerr = security_inode_setsecctx(dentry,
 			attr->na_seclabel->data, attr->na_seclabel->len);
@@ -1255,7 +1279,7 @@ nfsd_check_ignore_resizing(struct iattr *iap)
 /* The parent directory should already be locked: */
 __be32
 nfsd_create_locked(struct svc_rqst *rqstp, struct svc_fh *fhp,
-		   char *fname, int flen, struct nfsd_attrs *attrs,
+		   struct nfsd_attrs *attrs,
 		   int type, dev_t rdev, struct svc_fh *resfhp)
 {
 	struct dentry	*dentry, *dchild;
@@ -1382,8 +1406,7 @@ nfsd_create(struct svc_rqst *rqstp, struct svc_fh *fhp,
 	if (err)
 		goto out_unlock;
 	fh_fill_pre_attrs(fhp);
-	err = nfsd_create_locked(rqstp, fhp, fname, flen, attrs, type,
-				 rdev, resfhp);
+	err = nfsd_create_locked(rqstp, fhp, attrs, type, rdev, resfhp);
 	fh_fill_post_attrs(fhp);
 out_unlock:
 	inode_unlock(dentry->d_inode);
@@ -1673,7 +1696,15 @@ retry:
 			.new_dir	= tdir,
 			.new_dentry	= ndentry,
 		};
-		host_err = vfs_rename(&rd);
+		int retries;
+
+		for (retries = 1;;) {
+			host_err = vfs_rename(&rd);
+			if (host_err != -EAGAIN || !retries--)
+				break;
+			if (!nfsd_wait_for_delegreturn(rqstp, d_inode(odentry)))
+				break;
+		}
 		if (!host_err) {
 			host_err = commit_metadata(tfhp);
 			if (!host_err)
@@ -1757,9 +1788,18 @@ nfsd_unlink(struct svc_rqst *rqstp, struct svc_fh *fhp, int type,
 
 	fh_fill_pre_attrs(fhp);
 	if (type != S_IFDIR) {
+		int retries;
+
 		if (rdentry->d_sb->s_export_op->flags & EXPORT_OP_CLOSE_BEFORE_UNLINK)
 			nfsd_close_cached_files(rdentry);
-		host_err = vfs_unlink(&init_user_ns, dirp, rdentry, NULL);
+
+		for (retries = 1;;) {
+			host_err = vfs_unlink(&init_user_ns, dirp, rdentry, NULL);
+			if (host_err != -EAGAIN || !retries--)
+				break;
+			if (!nfsd_wait_for_delegreturn(rqstp, rinode))
+				break;
+		}
 	} else {
 		host_err = vfs_rmdir(&init_user_ns, dirp, rdentry);
 	}
diff --git a/fs/nfsd/vfs.h b/fs/nfsd/vfs.h
index c95cd414b4bb..120521bc7b24 100644
--- a/fs/nfsd/vfs.h
+++ b/fs/nfsd/vfs.h
@@ -79,8 +79,8 @@ __be32		nfsd4_clone_file_range(struct svc_rqst *rqstp,
 				       u64 count, bool sync);
 #endif /* CONFIG_NFSD_V4 */
 __be32		nfsd_create_locked(struct svc_rqst *, struct svc_fh *,
-				char *name, int len, struct nfsd_attrs *attrs,
-				int type, dev_t rdev, struct svc_fh *res);
+				struct nfsd_attrs *attrs, int type, dev_t rdev,
+				struct svc_fh *res);
 __be32		nfsd_create(struct svc_rqst *, struct svc_fh *,
 				char *name, int len, struct nfsd_attrs *attrs,
 				int type, dev_t rdev, struct svc_fh *res);
diff --git a/fs/nfsd/xdr4.h b/fs/nfsd/xdr4.h
index 96267258e629..0eb00105d845 100644
--- a/fs/nfsd/xdr4.h
+++ b/fs/nfsd/xdr4.h
@@ -717,13 +717,13 @@ struct nfsd4_compoundargs {
 	struct svcxdr_tmpbuf		*to_free;
 	struct svc_rqst			*rqstp;
 
-	u32				taglen;
 	char *				tag;
+	u32				taglen;
 	u32				minorversion;
+	u32				client_opcnt;
 	u32				opcnt;
 	struct nfsd4_op			*ops;
 	struct nfsd4_op			iops[8];
-	int				cachetype;
 };
 
 struct nfsd4_compoundres {
@@ -732,8 +732,8 @@ struct nfsd4_compoundres {
 	struct svc_rqst *		rqstp;
 
 	__be32				*statusp;
-	u32				taglen;
 	char *				tag;
+	u32				taglen;
 	u32				opcnt;
 
 	struct nfsd4_compound_state	cstate;
@@ -888,7 +888,8 @@ struct nfsd4_operation {
 	u32 op_flags;
 	char *op_name;
 	/* Try to get response size before operation */
-	u32 (*op_rsize_bop)(struct svc_rqst *, struct nfsd4_op *);
+	u32 (*op_rsize_bop)(const struct svc_rqst *rqstp,
+			const struct nfsd4_op *op);
 	void (*op_get_currentstateid)(struct nfsd4_compound_state *,
 			union nfsd4_op_u *);
 	void (*op_set_currentstateid)(struct nfsd4_compound_state *,