Merge tag 'nfs-for-4.11-1' of git://git.linux-nfs.org/projects/anna/linux-nfs

Pull NFS client updates from Anna Schumaker:
 "Highlights include:

  Stable bugfixes:
   - NFSv4: Fix memory and state leak in _nfs4_open_and_get_state
   - xprtrdma: Fix Read chunk padding
   - xprtrdma: Per-connection pad optimization
   - xprtrdma: Disable pad optimization by default
   - xprtrdma: Reduce required number of send SGEs
   - nlm: Ensure callback code also checks that the files match
   - pNFS/flexfiles: If the layout is invalid, it must be updated before
     retrying
   - NFSv4: Fix reboot recovery in copy offload
   - Revert "NFSv4.1: Handle NFS4ERR_BADSESSION/NFS4ERR_DEADSESSION
     replies to OP_SEQUENCE"
   - NFSv4: fix getacl head length estimation
   - NFSv4: fix getacl ERANGE for sum ACL buffer sizes

  Features:
   - Add and use dprintk_cont macros
   - Various cleanups to NFS v4.x to reduce code duplication and
     complexity
   - Remove unused cr_magic related code
   - Improvements to sunrpc "read from buffer" code
   - Clean up sunrpc timeout code and allow changing TCP timeout
     parameters
   - Remove duplicate mw_list management code in xprtrdma
   - Add generic functions for encoding and decoding xdr streams

  Bugfixes:
   - Clean up nfs_show_mountd_netid
   - Make layoutreturn_ops static and use NULL instead of 0 to fix
     sparse warnings
   - Properly handle -ERESTARTSYS in nfs_rename()
   - Check if register_shrinker() failed during rpcauth_init()
   - Properly clean up procfs/pipefs entries
   - Various NFS over RDMA related fixes
   - Silence unititialized variable warning in sunrpc"

* tag 'nfs-for-4.11-1' of git://git.linux-nfs.org/projects/anna/linux-nfs: (64 commits)
  NFSv4: fix getacl ERANGE for some ACL buffer sizes
  NFSv4: fix getacl head length estimation
  Revert "NFSv4.1: Handle NFS4ERR_BADSESSION/NFS4ERR_DEADSESSION replies to OP_SEQUENCE"
  NFSv4: Fix reboot recovery in copy offload
  pNFS/flexfiles: If the layout is invalid, it must be updated before retrying
  NFSv4: Clean up owner/group attribute decode
  SUNRPC: Add a helper function xdr_stream_decode_string_dup()
  NFSv4: Remove bogus "struct nfs_client" argument from decode_ace()
  NFSv4: Fix the underestimation of delegation XDR space reservation
  NFSv4: Replace callback string decode function with a generic
  NFSv4: Replace the open coded decode_opaque_inline() with the new generic
  NFSv4: Replace ad-hoc xdr encode/decode helpers with xdr_stream_* generics
  SUNRPC: Add generic helpers for xdr_stream encode/decode
  sunrpc: silence uninitialized variable warning
  nlm: Ensure callback code also checks that the files match
  sunrpc: Allow xprt->ops->timer method to sleep
  xprtrdma: Refactor management of mw_list field
  xprtrdma: Handle stale connection rejection
  xprtrdma: Properly recover FRWRs with in-flight FASTREG WRs
  xprtrdma: Shrink send SGEs array
  ...

7 files changed, 233 insertions, 38 deletions

diff --git a/include/linux/sunrpc/auth.h b/include/linux/sunrpc/auth.h
index b1bc62ba20a2..8fd3504946ad 100644
--- a/include/linux/sunrpc/auth.h
+++ b/include/linux/sunrpc/auth.h
@@ -32,6 +32,7 @@
  */
 #define UNX_MAXNODENAME	__NEW_UTS_LEN
 #define UNX_CALLSLACK	(21 + XDR_QUADLEN(UNX_MAXNODENAME))
+#define UNX_NGROUPS	16
 
 struct rpcsec_gss_info;
 
@@ -63,9 +64,6 @@ struct rpc_cred {
 	struct rcu_head		cr_rcu;
 	struct rpc_auth *	cr_auth;
 	const struct rpc_credops *cr_ops;
-#if IS_ENABLED(CONFIG_SUNRPC_DEBUG)
-	unsigned long		cr_magic;	/* 0x0f4aa4f0 */
-#endif
 	unsigned long		cr_expire;	/* when to gc */
 	unsigned long		cr_flags;	/* various flags */
 	atomic_t		cr_count;	/* ref count */
@@ -79,8 +77,6 @@ struct rpc_cred {
 #define RPCAUTH_CRED_HASHED	2
 #define RPCAUTH_CRED_NEGATIVE	3
 
-#define RPCAUTH_CRED_MAGIC	0x0f4aa4f0
-
 /* rpc_auth au_flags */
 #define RPCAUTH_AUTH_NO_CRKEY_TIMEOUT	0x0001 /* underlying cred has no key timeout */
 
diff --git a/include/linux/sunrpc/cache.h b/include/linux/sunrpc/cache.h
index 20d157a518a7..270bad0e1bed 100644
--- a/include/linux/sunrpc/cache.h
+++ b/include/linux/sunrpc/cache.h
@@ -63,15 +63,6 @@ struct cache_head {
 
 #define	CACHE_NEW_EXPIRY 120	/* keep new things pending confirmation for 120 seconds */
 
-struct cache_detail_procfs {
-	struct proc_dir_entry	*proc_ent;
-	struct proc_dir_entry   *flush_ent, *channel_ent, *content_ent;
-};
-
-struct cache_detail_pipefs {
-	struct dentry *dir;
-};
-
 struct cache_detail {
 	struct module *		owner;
 	int			hash_size;
@@ -123,9 +114,9 @@ struct cache_detail {
 	time_t			last_warn;		/* when we last warned about no readers */
 
 	union {
-		struct cache_detail_procfs procfs;
-		struct cache_detail_pipefs pipefs;
-	} u;
+		struct proc_dir_entry	*procfs;
+		struct dentry		*pipefs;
+	};
 	struct net		*net;
 };
 
diff --git a/include/linux/sunrpc/clnt.h b/include/linux/sunrpc/clnt.h
index 333ad11b3dd9..6095ecba0dde 100644
--- a/include/linux/sunrpc/clnt.h
+++ b/include/linux/sunrpc/clnt.h
@@ -182,7 +182,6 @@ int		rpc_protocol(struct rpc_clnt *);
 struct net *	rpc_net_ns(struct rpc_clnt *);
 size_t		rpc_max_payload(struct rpc_clnt *);
 size_t		rpc_max_bc_payload(struct rpc_clnt *);
-unsigned long	rpc_get_timeout(struct rpc_clnt *clnt);
 void		rpc_force_rebind(struct rpc_clnt *);
 size_t		rpc_peeraddr(struct rpc_clnt *, struct sockaddr *, size_t);
 const char	*rpc_peeraddr2str(struct rpc_clnt *, enum rpc_display_format_t);
@@ -202,8 +201,9 @@ int		rpc_clnt_add_xprt(struct rpc_clnt *, struct xprt_create *,
 				struct rpc_xprt *,
 				void *),
 			void *data);
-void		rpc_cap_max_reconnect_timeout(struct rpc_clnt *clnt,
-			unsigned long timeo);
+void		rpc_set_connect_timeout(struct rpc_clnt *clnt,
+			unsigned long connect_timeout,
+			unsigned long reconnect_timeout);
 
 int		rpc_clnt_setup_test_and_add_xprt(struct rpc_clnt *,
 			struct rpc_xprt_switch *,
diff --git a/include/linux/sunrpc/debug.h b/include/linux/sunrpc/debug.h
index 59a7889e15db..8da0f37f3bdc 100644
--- a/include/linux/sunrpc/debug.h
+++ b/include/linux/sunrpc/debug.h
@@ -20,33 +20,55 @@ extern unsigned int		nfsd_debug;
 extern unsigned int		nlm_debug;
 #endif
 
-#define dprintk(args...)	dfprintk(FACILITY, ## args)
-#define dprintk_rcu(args...)	dfprintk_rcu(FACILITY, ## args)
+#define dprintk(fmt, ...)						\
+	dfprintk(FACILITY, fmt, ##__VA_ARGS__)
+#define dprintk_cont(fmt, ...)						\
+	dfprintk_cont(FACILITY, fmt, ##__VA_ARGS__)
+#define dprintk_rcu(fmt, ...)						\
+	dfprintk_rcu(FACILITY, fmt, ##__VA_ARGS__)
+#define dprintk_rcu_cont(fmt, ...)					\
+	dfprintk_rcu_cont(FACILITY, fmt, ##__VA_ARGS__)
 
 #undef ifdebug
 #if IS_ENABLED(CONFIG_SUNRPC_DEBUG)
 # define ifdebug(fac)		if (unlikely(rpc_debug & RPCDBG_##fac))
 
-# define dfprintk(fac, args...)	\
-	do { \
-		ifdebug(fac) \
-			printk(KERN_DEFAULT args); \
-	} while (0)
-
-# define dfprintk_rcu(fac, args...)	\
-	do { \
-		ifdebug(fac) { \
-			rcu_read_lock(); \
-			printk(KERN_DEFAULT args); \
-			rcu_read_unlock(); \
-		} \
-	} while (0)
+# define dfprintk(fac, fmt, ...)					\
+do {									\
+	ifdebug(fac)							\
+		printk(KERN_DEFAULT fmt, ##__VA_ARGS__);		\
+} while (0)
+
+# define dfprintk_cont(fac, fmt, ...)					\
+do {									\
+	ifdebug(fac)							\
+		printk(KERN_CONT fmt, ##__VA_ARGS__);			\
+} while (0)
+
+# define dfprintk_rcu(fac, fmt, ...)					\
+do {									\
+	ifdebug(fac) {							\
+		rcu_read_lock();					\
+		printk(KERN_DEFAULT fmt, ##__VA_ARGS__);		\
+		rcu_read_unlock();					\
+	}								\
+} while (0)
+
+# define dfprintk_rcu_cont(fac, fmt, ...)				\
+do {									\
+	ifdebug(fac) {							\
+		rcu_read_lock();					\
+		printk(KERN_CONT fmt, ##__VA_ARGS__);			\
+		rcu_read_unlock();					\
+	}								\
+} while (0)
 
 # define RPC_IFDEBUG(x)		x
 #else
 # define ifdebug(fac)		if (0)
-# define dfprintk(fac, args...)	do {} while (0)
-# define dfprintk_rcu(fac, args...)	do {} while (0)
+# define dfprintk(fac, fmt, ...)	do {} while (0)
+# define dfprintk_cont(fac, fmt, ...)	do {} while (0)
+# define dfprintk_rcu(fac, fmt, ...)	do {} while (0)
 # define RPC_IFDEBUG(x)
 #endif
 
diff --git a/include/linux/sunrpc/xdr.h b/include/linux/sunrpc/xdr.h
index 56c48c884a24..054c8cde18f3 100644
--- a/include/linux/sunrpc/xdr.h
+++ b/include/linux/sunrpc/xdr.h
@@ -242,6 +242,185 @@ extern unsigned int xdr_read_pages(struct xdr_stream *xdr, unsigned int len);
 extern void xdr_enter_page(struct xdr_stream *xdr, unsigned int len);
 extern int xdr_process_buf(struct xdr_buf *buf, unsigned int offset, unsigned int len, int (*actor)(struct scatterlist *, void *), void *data);
 
+ssize_t xdr_stream_decode_string_dup(struct xdr_stream *xdr, char **str,
+		size_t maxlen, gfp_t gfp_flags);
+/**
+ * xdr_align_size - Calculate padded size of an object
+ * @n: Size of an object being XDR encoded (in bytes)
+ *
+ * Return value:
+ *   Size (in bytes) of the object including xdr padding
+ */
+static inline size_t
+xdr_align_size(size_t n)
+{
+	const size_t mask = sizeof(__u32) - 1;
+
+	return (n + mask) & ~mask;
+}
+
+/**
+ * xdr_stream_encode_u32 - Encode a 32-bit integer
+ * @xdr: pointer to xdr_stream
+ * @n: integer to encode
+ *
+ * Return values:
+ *   On success, returns length in bytes of XDR buffer consumed
+ *   %-EMSGSIZE on XDR buffer overflow
+ */
+static inline ssize_t
+xdr_stream_encode_u32(struct xdr_stream *xdr, __u32 n)
+{
+	const size_t len = sizeof(n);
+	__be32 *p = xdr_reserve_space(xdr, len);
+
+	if (unlikely(!p))
+		return -EMSGSIZE;
+	*p = cpu_to_be32(n);
+	return len;
+}
+
+/**
+ * xdr_stream_encode_u64 - Encode a 64-bit integer
+ * @xdr: pointer to xdr_stream
+ * @n: 64-bit integer to encode
+ *
+ * Return values:
+ *   On success, returns length in bytes of XDR buffer consumed
+ *   %-EMSGSIZE on XDR buffer overflow
+ */
+static inline ssize_t
+xdr_stream_encode_u64(struct xdr_stream *xdr, __u64 n)
+{
+	const size_t len = sizeof(n);
+	__be32 *p = xdr_reserve_space(xdr, len);
+
+	if (unlikely(!p))
+		return -EMSGSIZE;
+	xdr_encode_hyper(p, n);
+	return len;
+}
+
+/**
+ * xdr_stream_encode_opaque_fixed - Encode fixed length opaque xdr data
+ * @xdr: pointer to xdr_stream
+ * @ptr: pointer to opaque data object
+ * @len: size of object pointed to by @ptr
+ *
+ * Return values:
+ *   On success, returns length in bytes of XDR buffer consumed
+ *   %-EMSGSIZE on XDR buffer overflow
+ */
+static inline ssize_t
+xdr_stream_encode_opaque_fixed(struct xdr_stream *xdr, const void *ptr, size_t len)
+{
+	__be32 *p = xdr_reserve_space(xdr, len);
+
+	if (unlikely(!p))
+		return -EMSGSIZE;
+	xdr_encode_opaque_fixed(p, ptr, len);
+	return xdr_align_size(len);
+}
+
+/**
+ * xdr_stream_encode_opaque - Encode variable length opaque xdr data
+ * @xdr: pointer to xdr_stream
+ * @ptr: pointer to opaque data object
+ * @len: size of object pointed to by @ptr
+ *
+ * Return values:
+ *   On success, returns length in bytes of XDR buffer consumed
+ *   %-EMSGSIZE on XDR buffer overflow
+ */
+static inline ssize_t
+xdr_stream_encode_opaque(struct xdr_stream *xdr, const void *ptr, size_t len)
+{
+	size_t count = sizeof(__u32) + xdr_align_size(len);
+	__be32 *p = xdr_reserve_space(xdr, count);
+
+	if (unlikely(!p))
+		return -EMSGSIZE;
+	xdr_encode_opaque(p, ptr, len);
+	return count;
+}
+
+/**
+ * xdr_stream_decode_u32 - Decode a 32-bit integer
+ * @xdr: pointer to xdr_stream
+ * @ptr: location to store integer
+ *
+ * Return values:
+ *   %0 on success
+ *   %-EBADMSG on XDR buffer overflow
+ */
+static inline ssize_t
+xdr_stream_decode_u32(struct xdr_stream *xdr, __u32 *ptr)
+{
+	const size_t count = sizeof(*ptr);
+	__be32 *p = xdr_inline_decode(xdr, count);
+
+	if (unlikely(!p))
+		return -EBADMSG;
+	*ptr = be32_to_cpup(p);
+	return 0;
+}
+
+/**
+ * xdr_stream_decode_opaque_fixed - Decode fixed length opaque xdr data
+ * @xdr: pointer to xdr_stream
+ * @ptr: location to store data
+ * @len: size of buffer pointed to by @ptr
+ *
+ * Return values:
+ *   On success, returns size of object stored in @ptr
+ *   %-EBADMSG on XDR buffer overflow
+ */
+static inline ssize_t
+xdr_stream_decode_opaque_fixed(struct xdr_stream *xdr, void *ptr, size_t len)
+{
+	__be32 *p = xdr_inline_decode(xdr, len);
+
+	if (unlikely(!p))
+		return -EBADMSG;
+	xdr_decode_opaque_fixed(p, ptr, len);
+	return len;
+}
+
+/**
+ * xdr_stream_decode_opaque_inline - Decode variable length opaque xdr data
+ * @xdr: pointer to xdr_stream
+ * @ptr: location to store pointer to opaque data
+ * @maxlen: maximum acceptable object size
+ *
+ * Note: the pointer stored in @ptr cannot be assumed valid after the XDR
+ * buffer has been destroyed, or even after calling xdr_inline_decode()
+ * on @xdr. It is therefore expected that the object it points to should
+ * be processed immediately.
+ *
+ * Return values:
+ *   On success, returns size of object stored in *@ptr
+ *   %-EBADMSG on XDR buffer overflow
+ *   %-EMSGSIZE if the size of the object would exceed @maxlen
+ */
+static inline ssize_t
+xdr_stream_decode_opaque_inline(struct xdr_stream *xdr, void **ptr, size_t maxlen)
+{
+	__be32 *p;
+	__u32 len;
+
+	*ptr = NULL;
+	if (unlikely(xdr_stream_decode_u32(xdr, &len) < 0))
+		return -EBADMSG;
+	if (len != 0) {
+		p = xdr_inline_decode(xdr, len);
+		if (unlikely(!p))
+			return -EBADMSG;
+		if (unlikely(len > maxlen))
+			return -EMSGSIZE;
+		*ptr = p;
+	}
+	return len;
+}
 #endif /* __KERNEL__ */
 
 #endif /* _SUNRPC_XDR_H_ */
diff --git a/include/linux/sunrpc/xprt.h b/include/linux/sunrpc/xprt.h
index a5da60b24d83..eab1c749e192 100644
--- a/include/linux/sunrpc/xprt.h
+++ b/include/linux/sunrpc/xprt.h
@@ -137,6 +137,9 @@ struct rpc_xprt_ops {
 	void		(*release_request)(struct rpc_task *task);
 	void		(*close)(struct rpc_xprt *xprt);
 	void		(*destroy)(struct rpc_xprt *xprt);
+	void		(*set_connect_timeout)(struct rpc_xprt *xprt,
+					unsigned long connect_timeout,
+					unsigned long reconnect_timeout);
 	void		(*print_stats)(struct rpc_xprt *xprt, struct seq_file *seq);
 	int		(*enable_swap)(struct rpc_xprt *xprt);
 	void		(*disable_swap)(struct rpc_xprt *xprt);
@@ -221,6 +224,7 @@ struct rpc_xprt {
 	struct timer_list	timer;
 	unsigned long		last_used,
 				idle_timeout,
+				connect_timeout,
 				max_reconnect_timeout;
 
 	/*
diff --git a/include/linux/sunrpc/xprtsock.h b/include/linux/sunrpc/xprtsock.h
index bef3fb0abb8f..c9959d7e3579 100644
--- a/include/linux/sunrpc/xprtsock.h
+++ b/include/linux/sunrpc/xprtsock.h
@@ -55,6 +55,8 @@ struct sock_xprt {
 	size_t			rcvsize,
 				sndsize;
 
+	struct rpc_timeout	tcp_timeout;
+
 	/*
 	 * Saved socket callback addresses
 	 */
@@ -81,6 +83,7 @@ struct sock_xprt {
 
 #define XPRT_SOCK_CONNECTING	1U
 #define XPRT_SOCK_DATA_READY	(2)
+#define XPRT_SOCK_UPD_TIMEOUT	(3)
 
 #endif /* __KERNEL__ */