Add the rt linux 4.1.3-rt3 as base

Import the rt linux 4.1.3-rt3 as OPNFV kvm base.

It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:

commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date:   Sat Jul 25 12:13:34 2015 +0200

    Prepare v4.1.3-rt3

    Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>

We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.

Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>

1 files changed, 365 insertions, 0 deletions

diff --git a/kernel/include/linux/lockd/lockd.h b/kernel/include/linux/lockd/lockd.h
new file mode 100644
index 000000000..ff82a3287
--- /dev/null
+++ b/kernel/include/linux/lockd/lockd.h
@@ -0,0 +1,365 @@
+/*
+ * linux/include/linux/lockd/lockd.h
+ *
+ * General-purpose lockd include file.
+ *
+ * Copyright (C) 1996 Olaf Kirch <okir@monad.swb.de>
+ */
+
+#ifndef LINUX_LOCKD_LOCKD_H
+#define LINUX_LOCKD_LOCKD_H
+
+#ifdef __KERNEL__
+
+#include <linux/in.h>
+#include <linux/in6.h>
+#include <net/ipv6.h>
+#include <linux/fs.h>
+#include <linux/kref.h>
+#include <linux/utsname.h>
+#include <linux/lockd/bind.h>
+#include <linux/lockd/xdr.h>
+#ifdef CONFIG_LOCKD_V4
+#include <linux/lockd/xdr4.h>
+#endif
+#include <linux/lockd/debug.h>
+#include <linux/sunrpc/svc.h>
+
+/*
+ * Version string
+ */
+#define LOCKD_VERSION		"0.5"
+
+/*
+ * Default timeout for RPC calls (seconds)
+ */
+#define LOCKD_DFLT_TIMEO	10
+
+/*
+ * Lockd host handle (used both by the client and server personality).
+ */
+struct nlm_host {
+	struct hlist_node	h_hash;		/* doubly linked list */
+	struct sockaddr_storage	h_addr;		/* peer address */
+	size_t			h_addrlen;
+	struct sockaddr_storage	h_srcaddr;	/* our address (optional) */
+	size_t			h_srcaddrlen;
+	struct rpc_clnt		*h_rpcclnt;	/* RPC client to talk to peer */
+	char			*h_name;		/* remote hostname */
+	u32			h_version;	/* interface version */
+	unsigned short		h_proto;	/* transport proto */
+	unsigned short		h_reclaiming : 1,
+				h_server     : 1, /* server side, not client side */
+				h_noresvport : 1,
+				h_inuse      : 1;
+	wait_queue_head_t	h_gracewait;	/* wait while reclaiming */
+	struct rw_semaphore	h_rwsem;	/* Reboot recovery lock */
+	u32			h_state;	/* pseudo-state counter */
+	u32			h_nsmstate;	/* true remote NSM state */
+	u32			h_pidcount;	/* Pseudopids */
+	atomic_t		h_count;	/* reference count */
+	struct mutex		h_mutex;	/* mutex for pmap binding */
+	unsigned long		h_nextrebind;	/* next portmap call */
+	unsigned long		h_expires;	/* eligible for GC */
+	struct list_head	h_lockowners;	/* Lockowners for the client */
+	spinlock_t		h_lock;
+	struct list_head	h_granted;	/* Locks in GRANTED state */
+	struct list_head	h_reclaim;	/* Locks in RECLAIM state */
+	struct nsm_handle	*h_nsmhandle;	/* NSM status handle */
+	char			*h_addrbuf;	/* address eyecatcher */
+	struct net		*net;		/* host net */
+};
+
+/*
+ * The largest string sm_addrbuf should hold is a full-size IPv6 address
+ * (no "::" anywhere) with a scope ID.  The buffer size is computed to
+ * hold eight groups of colon-separated four-hex-digit numbers, a
+ * percent sign, a scope id (at most 32 bits, in decimal), and NUL.
+ */
+#define NSM_ADDRBUF		((8 * 4 + 7) + (1 + 10) + 1)
+
+struct nsm_handle {
+	struct list_head	sm_link;
+	atomic_t		sm_count;
+	char			*sm_mon_name;
+	char			*sm_name;
+	struct sockaddr_storage	sm_addr;
+	size_t			sm_addrlen;
+	unsigned int		sm_monitored : 1,
+				sm_sticky : 1;	/* don't unmonitor */
+	struct nsm_private	sm_priv;
+	char			sm_addrbuf[NSM_ADDRBUF];
+};
+
+/*
+ * Rigorous type checking on sockaddr type conversions
+ */
+static inline struct sockaddr_in *nlm_addr_in(const struct nlm_host *host)
+{
+	return (struct sockaddr_in *)&host->h_addr;
+}
+
+static inline struct sockaddr *nlm_addr(const struct nlm_host *host)
+{
+	return (struct sockaddr *)&host->h_addr;
+}
+
+static inline struct sockaddr_in *nlm_srcaddr_in(const struct nlm_host *host)
+{
+	return (struct sockaddr_in *)&host->h_srcaddr;
+}
+
+static inline struct sockaddr *nlm_srcaddr(const struct nlm_host *host)
+{
+	return (struct sockaddr *)&host->h_srcaddr;
+}
+
+/*
+ * Map an fl_owner_t into a unique 32-bit "pid"
+ */
+struct nlm_lockowner {
+	struct list_head list;
+	atomic_t count;
+
+	struct nlm_host *host;
+	fl_owner_t owner;
+	uint32_t pid;
+};
+
+struct nlm_wait;
+
+/*
+ * Memory chunk for NLM client RPC request.
+ */
+#define NLMCLNT_OHSIZE		((__NEW_UTS_LEN) + 10u)
+struct nlm_rqst {
+	atomic_t		a_count;
+	unsigned int		a_flags;	/* initial RPC task flags */
+	struct nlm_host *	a_host;		/* host handle */
+	struct nlm_args		a_args;		/* arguments */
+	struct nlm_res		a_res;		/* result */
+	struct nlm_block *	a_block;
+	unsigned int		a_retries;	/* Retry count */
+	u8			a_owner[NLMCLNT_OHSIZE];
+};
+
+/*
+ * This struct describes a file held open by lockd on behalf of
+ * an NFS client.
+ */
+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 nlm_share *	f_shares;	/* DOS shares */
+	struct list_head	f_blocks;	/* blocked locks */
+	unsigned int		f_locks;	/* guesstimate # of locks */
+	unsigned int		f_count;	/* reference count */
+	struct mutex		f_mutex;	/* avoid concurrent access */
+};
+
+/*
+ * This is a server block (i.e. a lock requested by some client which
+ * couldn't be granted because of a conflicting lock).
+ */
+#define NLM_NEVER		(~(unsigned long) 0)
+/* timeout on non-blocking call: */
+#define NLM_TIMEOUT		(7 * HZ)
+
+struct nlm_block {
+	struct kref		b_count;	/* Reference count */
+	struct list_head	b_list;		/* linked list of all blocks */
+	struct list_head	b_flist;	/* linked list (per file) */
+	struct nlm_rqst	*	b_call;		/* RPC args & callback info */
+	struct svc_serv *	b_daemon;	/* NLM service */
+	struct nlm_host *	b_host;		/* host handle for RPC clnt */
+	unsigned long		b_when;		/* next re-xmit */
+	unsigned int		b_id;		/* block id */
+	unsigned char		b_granted;	/* VFS granted lock */
+	struct nlm_file *	b_file;		/* file in question */
+	struct cache_req *	b_cache_req;	/* deferred request handling */
+	struct cache_deferred_req * b_deferred_req;
+	unsigned int		b_flags;	/* block flags */
+#define B_QUEUED		1	/* lock queued */
+#define B_GOT_CALLBACK		2	/* got lock or conflicting lock */
+#define B_TIMED_OUT		4	/* filesystem too slow to respond */
+};
+
+/*
+ * Global variables
+ */
+extern const struct rpc_program	nlm_program;
+extern struct svc_procedure	nlmsvc_procedures[];
+#ifdef CONFIG_LOCKD_V4
+extern struct svc_procedure	nlmsvc_procedures4[];
+#endif
+extern int			nlmsvc_grace_period;
+extern unsigned long		nlmsvc_timeout;
+extern bool			nsm_use_hostnames;
+extern u32			nsm_local_state;
+
+/*
+ * Lockd client functions
+ */
+struct nlm_rqst * nlm_alloc_call(struct nlm_host *host);
+int		  nlm_async_call(struct nlm_rqst *, u32, const struct rpc_call_ops *);
+int		  nlm_async_reply(struct nlm_rqst *, u32, const struct rpc_call_ops *);
+void		  nlmclnt_release_call(struct nlm_rqst *);
+struct nlm_wait * nlmclnt_prepare_block(struct nlm_host *host, struct file_lock *fl);
+void		  nlmclnt_finish_block(struct nlm_wait *block);
+int		  nlmclnt_block(struct nlm_wait *block, struct nlm_rqst *req, long timeout);
+__be32		  nlmclnt_grant(const struct sockaddr *addr,
+				const struct nlm_lock *lock);
+void		  nlmclnt_recovery(struct nlm_host *);
+int		  nlmclnt_reclaim(struct nlm_host *, struct file_lock *,
+				  struct nlm_rqst *);
+void		  nlmclnt_next_cookie(struct nlm_cookie *);
+
+/*
+ * Host cache
+ */
+struct nlm_host  *nlmclnt_lookup_host(const struct sockaddr *sap,
+					const size_t salen,
+					const unsigned short protocol,
+					const u32 version,
+					const char *hostname,
+					int noresvport,
+					struct net *net);
+void		  nlmclnt_release_host(struct nlm_host *);
+struct nlm_host  *nlmsvc_lookup_host(const struct svc_rqst *rqstp,
+					const char *hostname,
+					const size_t hostname_len);
+void		  nlmsvc_release_host(struct nlm_host *);
+struct rpc_clnt * nlm_bind_host(struct nlm_host *);
+void		  nlm_rebind_host(struct nlm_host *);
+struct nlm_host * nlm_get_host(struct nlm_host *);
+void		  nlm_shutdown_hosts(void);
+void		  nlm_shutdown_hosts_net(struct net *net);
+void		  nlm_host_rebooted(const struct nlm_reboot *);
+
+/*
+ * Host monitoring
+ */
+int		  nsm_monitor(const struct nlm_host *host);
+void		  nsm_unmonitor(const struct nlm_host *host);
+
+struct nsm_handle *nsm_get_handle(const struct sockaddr *sap,
+					const size_t salen,
+					const char *hostname,
+					const size_t hostname_len);
+struct nsm_handle *nsm_reboot_lookup(const struct nlm_reboot *info);
+void		  nsm_release(struct nsm_handle *nsm);
+
+/*
+ * This is used in garbage collection and resource reclaim
+ * A return value != 0 means destroy the lock/block/share
+ */
+typedef int	  (*nlm_host_match_fn_t)(void *cur, struct nlm_host *ref);
+
+/*
+ * Server-side lock handling
+ */
+__be32		  nlmsvc_lock(struct svc_rqst *, struct nlm_file *,
+			      struct nlm_host *, struct nlm_lock *, int,
+			      struct nlm_cookie *, int);
+__be32		  nlmsvc_unlock(struct net *net, struct nlm_file *, struct nlm_lock *);
+__be32		  nlmsvc_testlock(struct svc_rqst *, struct nlm_file *,
+			struct nlm_host *, struct nlm_lock *,
+			struct nlm_lock *, struct nlm_cookie *);
+__be32		  nlmsvc_cancel_blocked(struct net *net, struct nlm_file *, struct nlm_lock *);
+unsigned long	  nlmsvc_retry_blocked(void);
+void		  nlmsvc_traverse_blocks(struct nlm_host *, struct nlm_file *,
+					nlm_host_match_fn_t match);
+void		  nlmsvc_grant_reply(struct nlm_cookie *, __be32);
+void		  nlmsvc_release_call(struct nlm_rqst *);
+
+/*
+ * File handling for the server personality
+ */
+__be32		  nlm_lookup_file(struct svc_rqst *, struct nlm_file **,
+					struct nfs_fh *);
+void		  nlm_release_file(struct nlm_file *);
+void		  nlmsvc_mark_resources(struct net *);
+void		  nlmsvc_free_host_resources(struct nlm_host *);
+void		  nlmsvc_invalidate_all(void);
+
+/*
+ * Cluster failover support
+ */
+int           nlmsvc_unlock_all_by_sb(struct super_block *sb);
+int           nlmsvc_unlock_all_by_ip(struct sockaddr *server_addr);
+
+static inline struct inode *nlmsvc_file_inode(struct nlm_file *file)
+{
+	return file_inode(file->f_file);
+}
+
+static inline int __nlm_privileged_request4(const struct sockaddr *sap)
+{
+	const struct sockaddr_in *sin = (struct sockaddr_in *)sap;
+
+	if (ntohs(sin->sin_port) > 1023)
+		return 0;
+
+	return ipv4_is_loopback(sin->sin_addr.s_addr);
+}
+
+#if IS_ENABLED(CONFIG_IPV6)
+static inline int __nlm_privileged_request6(const struct sockaddr *sap)
+{
+	const struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sap;
+
+	if (ntohs(sin6->sin6_port) > 1023)
+		return 0;
+
+	if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_MAPPED)
+		return ipv4_is_loopback(sin6->sin6_addr.s6_addr32[3]);
+
+	return ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LOOPBACK;
+}
+#else	/* IS_ENABLED(CONFIG_IPV6) */
+static inline int __nlm_privileged_request6(const struct sockaddr *sap)
+{
+	return 0;
+}
+#endif	/* IS_ENABLED(CONFIG_IPV6) */
+
+/*
+ * Ensure incoming requests are from local privileged callers.
+ *
+ * Return TRUE if sender is local and is connecting via a privileged port;
+ * otherwise return FALSE.
+ */
+static inline int nlm_privileged_requester(const struct svc_rqst *rqstp)
+{
+	const struct sockaddr *sap = svc_addr(rqstp);
+
+	switch (sap->sa_family) {
+	case AF_INET:
+		return __nlm_privileged_request4(sap);
+	case AF_INET6:
+		return __nlm_privileged_request6(sap);
+	default:
+		return 0;
+	}
+}
+
+/*
+ * Compare two NLM locks.
+ * When the second lock is of type F_UNLCK, this acts like a wildcard.
+ */
+static inline int nlm_compare_locks(const struct file_lock *fl1,
+				    const struct file_lock *fl2)
+{
+	return	fl1->fl_pid   == fl2->fl_pid
+	     && fl1->fl_owner == fl2->fl_owner
+	     && fl1->fl_start == fl2->fl_start
+	     && fl1->fl_end   == fl2->fl_end
+	     &&(fl1->fl_type  == fl2->fl_type || fl2->fl_type == F_UNLCK);
+}
+
+extern const struct lock_manager_operations nlmsvc_lock_operations;
+
+#endif /* __KERNEL__ */
+
+#endif /* LINUX_LOCKD_LOCKD_H */