Merge tag 'nfsd-5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux

Pull nfsd updates from Chuck Lever:
 "New features:

   - Support for server-side disconnect injection via debugfs

   - Protocol definitions for new RPC_AUTH_TLS authentication flavor

  Performance improvements:

   - Reduce page allocator traffic in the NFSD splice read actor

   - Reduce CPU utilization in svcrdma's Send completion handler

  Notable bug fixes:

   - Stabilize lockd operation when re-exporting NFS mounts

   - Fix the use of %.*s in NFSD tracepoints

   - Fix /proc/sys/fs/nfs/nsm_use_hostnames"

* tag 'nfsd-5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux: (31 commits)
  nfsd: fix crash on LOCKT on reexported NFSv3
  nfs: don't allow reexport reclaims
  lockd: don't attempt blocking locks on nfs reexports
  nfs: don't atempt blocking locks on nfs reexports
  Keep read and write fds with each nlm_file
  lockd: update nlm_lookup_file reexport comment
  nlm: minor refactoring
  nlm: minor nlm_lookup_file argument change
  lockd: lockd server-side shouldn't set fl_ops
  SUNRPC: Add documentation for the fail_sunrpc/ directory
  SUNRPC: Server-side disconnect injection
  SUNRPC: Move client-side disconnect injection
  SUNRPC: Add a /sys/kernel/debug/fail_sunrpc/ directory
  svcrdma: xpt_bc_xprt is already clear in __svc_rdma_free()
  nfsd4: Fix forced-expiry locking
  rpc: fix gss_svc_init cleanup on failure
  SUNRPC: Add RPC_AUTH_TLS protocol numbers
  lockd: change the proc_handler for nsm_use_hostnames
  sysctl: introduce new proc handler proc_dobool
  SUNRPC: Fix a NULL pointer deref in trace_svc_stats_latency()
  ...

11 files changed, 27 insertions, 25 deletions

diff --git a/include/linux/errno.h b/include/linux/errno.h
index d73f597a2484..8b0c754bab02 100644
--- a/include/linux/errno.h
+++ b/include/linux/errno.h
@@ -31,5 +31,6 @@
 #define EJUKEBOX	528	/* Request initiated, but will not complete before timeout */
 #define EIOCBQUEUED	529	/* iocb queued, will get completion event */
 #define ERECALLCONFLICT	530	/* conflict with recalled state */
+#define ENOGRACE	531	/* NFS file lock reclaim refused */
 
 #endif
diff --git a/include/linux/exportfs.h b/include/linux/exportfs.h
index fe848901fcc3..3260fe714846 100644
--- a/include/linux/exportfs.h
+++ b/include/linux/exportfs.h
@@ -221,6 +221,8 @@ struct export_operations {
 #define EXPORT_OP_NOATOMIC_ATTR		(0x10) /* Filesystem cannot supply
 						  atomic attribute updates
 						*/
+#define EXPORT_OP_SYNC_LOCKS		(0x20) /* Filesystem can't do
+						  asychronous blocking locks */
 	unsigned long	flags;
 };
 
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 2c2bcfb12fef..1c01f9f2b574 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1037,6 +1037,7 @@ static inline struct file *get_file(struct file *f)
 #define FL_UNLOCK_PENDING	512 /* Lease is being broken */
 #define FL_OFDLCK	1024	/* lock is "owned" by struct file */
 #define FL_LAYOUT	2048	/* outstanding pNFS layout */
+#define FL_RECLAIM	4096	/* reclaiming from a reboot server */
 
 #define FL_CLOSE_POSIX (FL_POSIX | FL_CLOSE)
 
diff --git a/include/linux/lockd/bind.h b/include/linux/lockd/bind.h
index 0520c0cd73f4..3bc9f7410e21 100644
--- a/include/linux/lockd/bind.h
+++ b/include/linux/lockd/bind.h
@@ -27,7 +27,8 @@ struct rpc_task;
 struct nlmsvc_binding {
 	__be32			(*fopen)(struct svc_rqst *,
 						struct nfs_fh *,
-						struct file **);
+						struct file **,
+						int mode);
 	void			(*fclose)(struct file *);
 };
 
diff --git a/include/linux/lockd/lockd.h b/include/linux/lockd/lockd.h
index 666f5f310a04..c4ae6506b8b3 100644
--- a/include/linux/lockd/lockd.h
+++ b/include/linux/lockd/lockd.h
@@ -10,6 +10,8 @@
 #ifndef LINUX_LOCKD_LOCKD_H
 #define LINUX_LOCKD_LOCKD_H
 
+/* XXX: a lot of this should really be under fs/lockd. */
+
 #include <linux/in.h>
 #include <linux/in6.h>
 #include <net/ipv6.h>
@@ -154,7 +156,8 @@ struct nlm_rqst {
 struct nlm_file {
 	struct hlist_node	f_list;		/* linked list */
 	struct nfs_fh		f_handle;	/* NFS file handle */
-	struct file *		f_file;		/* VFS file pointer */
+	struct file *		f_file[2];	/* VFS file pointers,
+						   indexed by O_ flags */
 	struct nlm_share *	f_shares;	/* DOS shares */
 	struct list_head	f_blocks;	/* blocked locks */
 	unsigned int		f_locks;	/* guesstimate # of locks */
@@ -267,6 +270,7 @@ typedef int	  (*nlm_host_match_fn_t)(void *cur, struct nlm_host *ref);
 /*
  * Server-side lock handling
  */
+int		  lock_to_openmode(struct file_lock *);
 __be32		  nlmsvc_lock(struct svc_rqst *, struct nlm_file *,
 			      struct nlm_host *, struct nlm_lock *, int,
 			      struct nlm_cookie *, int);
@@ -286,7 +290,7 @@ void		  nlmsvc_locks_init_private(struct file_lock *, struct nlm_host *, pid_t);
  * File handling for the server personality
  */
 __be32		  nlm_lookup_file(struct svc_rqst *, struct nlm_file **,
-					struct nfs_fh *);
+					struct nlm_lock *);
 void		  nlm_release_file(struct nlm_file *);
 void		  nlmsvc_release_lockowner(struct nlm_lock *);
 void		  nlmsvc_mark_resources(struct net *);
@@ -301,7 +305,8 @@ int           nlmsvc_unlock_all_by_ip(struct sockaddr *server_addr);
 
 static inline struct inode *nlmsvc_file_inode(struct nlm_file *file)
 {
-	return locks_inode(file->f_file);
+	return locks_inode(file->f_file[O_RDONLY] ?
+			   file->f_file[O_RDONLY] : file->f_file[O_WRONLY]);
 }
 
 static inline int __nlm_privileged_request4(const struct sockaddr *sap)
diff --git a/include/linux/sunrpc/msg_prot.h b/include/linux/sunrpc/msg_prot.h
index 938c2bf29db8..02117ed0fa2e 100644
--- a/include/linux/sunrpc/msg_prot.h
+++ b/include/linux/sunrpc/msg_prot.h
@@ -20,6 +20,7 @@ enum rpc_auth_flavors {
 	RPC_AUTH_DES   = 3,
 	RPC_AUTH_KRB   = 4,
 	RPC_AUTH_GSS   = 6,
+	RPC_AUTH_TLS   = 7,
 	RPC_AUTH_MAXFLAVOR = 8,
 	/* pseudoflavors: */
 	RPC_AUTH_GSS_KRB5  = 390003,
diff --git a/include/linux/sunrpc/svc.h b/include/linux/sunrpc/svc.h
index e91d51ea028b..f0f846fa396e 100644
--- a/include/linux/sunrpc/svc.h
+++ b/include/linux/sunrpc/svc.h
@@ -19,6 +19,7 @@
 #include <linux/sunrpc/svcauth.h>
 #include <linux/wait.h>
 #include <linux/mm.h>
+#include <linux/pagevec.h>
 
 /* statistics for svc_pool structures */
 struct svc_pool_stats {
@@ -256,6 +257,7 @@ struct svc_rqst {
 	struct page *		*rq_next_page; /* next reply page to use */
 	struct page *		*rq_page_end;  /* one past the last page */
 
+	struct pagevec		rq_pvec;
 	struct kvec		rq_vec[RPCSVC_MAXPAGES]; /* generally useful.. */
 	struct bio_vec		rq_bvec[RPCSVC_MAXPAGES];
 
@@ -502,6 +504,8 @@ struct svc_rqst *svc_rqst_alloc(struct svc_serv *serv,
 					struct svc_pool *pool, int node);
 struct svc_rqst *svc_prepare_thread(struct svc_serv *serv,
 					struct svc_pool *pool, int node);
+void		   svc_rqst_replace_page(struct svc_rqst *rqstp,
+					 struct page *page);
 void		   svc_rqst_free(struct svc_rqst *);
 void		   svc_exit_thread(struct svc_rqst *);
 unsigned int	   svc_pool_map_get(void);
@@ -523,6 +527,7 @@ void		   svc_wake_up(struct svc_serv *);
 void		   svc_reserve(struct svc_rqst *rqstp, int space);
 struct svc_pool *  svc_pool_for_cpu(struct svc_serv *serv, int cpu);
 char *		   svc_print_addr(struct svc_rqst *, char *, size_t);
+const char *	   svc_proc_name(const struct svc_rqst *rqstp);
 int		   svc_encode_result_payload(struct svc_rqst *rqstp,
 					     unsigned int offset,
 					     unsigned int length);
diff --git a/include/linux/sunrpc/svc_rdma.h b/include/linux/sunrpc/svc_rdma.h
index 3184465de3a0..24aa159d29a7 100644
--- a/include/linux/sunrpc/svc_rdma.h
+++ b/include/linux/sunrpc/svc_rdma.h
@@ -90,9 +90,9 @@ struct svcxprt_rdma {
 	struct ib_pd         *sc_pd;
 
 	spinlock_t	     sc_send_lock;
-	struct list_head     sc_send_ctxts;
+	struct llist_head    sc_send_ctxts;
 	spinlock_t	     sc_rw_ctxt_lock;
-	struct list_head     sc_rw_ctxts;
+	struct llist_head    sc_rw_ctxts;
 
 	u32		     sc_pending_recvs;
 	u32		     sc_recv_batch;
@@ -150,7 +150,7 @@ struct svc_rdma_recv_ctxt {
 };
 
 struct svc_rdma_send_ctxt {
-	struct list_head	sc_list;
+	struct llist_node	sc_node;
 	struct rpc_rdma_cid	sc_cid;
 
 	struct ib_send_wr	sc_send_wr;
@@ -207,6 +207,7 @@ extern void svc_rdma_send_error_msg(struct svcxprt_rdma *rdma,
 				    struct svc_rdma_send_ctxt *sctxt,
 				    struct svc_rdma_recv_ctxt *rctxt,
 				    int status);
+extern void svc_rdma_wake_send_waiters(struct svcxprt_rdma *rdma, int avail);
 extern int svc_rdma_sendto(struct svc_rqst *);
 extern int svc_rdma_result_payload(struct svc_rqst *rqstp, unsigned int offset,
 				   unsigned int length);
diff --git a/include/linux/sunrpc/xdr.h b/include/linux/sunrpc/xdr.h
index a965cbc136ad..b519609af1d0 100644
--- a/include/linux/sunrpc/xdr.h
+++ b/include/linux/sunrpc/xdr.h
@@ -95,6 +95,7 @@ xdr_buf_init(struct xdr_buf *buf, void *start, size_t len)
 #define	rpc_auth_unix	cpu_to_be32(RPC_AUTH_UNIX)
 #define	rpc_auth_short	cpu_to_be32(RPC_AUTH_SHORT)
 #define	rpc_auth_gss	cpu_to_be32(RPC_AUTH_GSS)
+#define	rpc_auth_tls	cpu_to_be32(RPC_AUTH_TLS)
 
 #define	rpc_call	cpu_to_be32(RPC_CALL)
 #define	rpc_reply	cpu_to_be32(RPC_REPLY)
diff --git a/include/linux/sunrpc/xprt.h b/include/linux/sunrpc/xprt.h
index c8c39f22d3b1..b15c1f07162d 100644
--- a/include/linux/sunrpc/xprt.h
+++ b/include/linux/sunrpc/xprt.h
@@ -288,7 +288,6 @@ struct rpc_xprt {
 	const char		*address_strings[RPC_DISPLAY_MAX];
 #if IS_ENABLED(CONFIG_SUNRPC_DEBUG)
 	struct dentry		*debugfs;		/* debugfs directory */
-	atomic_t		inject_disconnect;
 #endif
 	struct rcu_head		rcu;
 	const struct xprt_class	*xprt_class;
@@ -502,21 +501,4 @@ static inline int xprt_test_and_set_binding(struct rpc_xprt *xprt)
 	return test_and_set_bit(XPRT_BINDING, &xprt->state);
 }
 
-#if IS_ENABLED(CONFIG_SUNRPC_DEBUG)
-extern unsigned int rpc_inject_disconnect;
-static inline void xprt_inject_disconnect(struct rpc_xprt *xprt)
-{
-	if (!rpc_inject_disconnect)
-		return;
-	if (atomic_dec_return(&xprt->inject_disconnect))
-		return;
-	atomic_set(&xprt->inject_disconnect, rpc_inject_disconnect);
-	xprt->ops->inject_disconnect(xprt);
-}
-#else
-static inline void xprt_inject_disconnect(struct rpc_xprt *xprt)
-{
-}
-#endif
-
 #endif /* _LINUX_SUNRPC_XPRT_H */
diff --git a/include/linux/sysctl.h b/include/linux/sysctl.h
index d99ca99837de..1fa2b69c6fc3 100644
--- a/include/linux/sysctl.h
+++ b/include/linux/sysctl.h
@@ -48,6 +48,8 @@ typedef int proc_handler(struct ctl_table *ctl, int write, void *buffer,
 		size_t *lenp, loff_t *ppos);
 
 int proc_dostring(struct ctl_table *, int, void *, size_t *, loff_t *);
+int proc_dobool(struct ctl_table *table, int write, void *buffer,
+		size_t *lenp, loff_t *ppos);
 int proc_dointvec(struct ctl_table *, int, void *, size_t *, loff_t *);
 int proc_douintvec(struct ctl_table *, int, void *, size_t *, loff_t *);
 int proc_dointvec_minmax(struct ctl_table *, int, void *, size_t *, loff_t *);