Import of Linux/MIPS 2.1.36

7 files changed, 503 insertions, 0 deletions

diff --git a/include/linux/lockd/bind.h b/include/linux/lockd/bind.h
new file mode 100644
index 000000000..4e0aebedb
--- /dev/null
+++ b/include/linux/lockd/bind.h
@@ -0,0 +1,43 @@
+/*
+ * linux/include/linux/lockd/bind.h
+ *
+ * This is the part of lockd visible to nfsd and the nfs client.
+ *
+ * Copyright (C) 1996, Olaf Kirch <okir@monad.swb.de>
+ */
+
+#ifndef LINUX_LOCKD_BIND_H
+#define LINUX_LOCKD_BIND_H
+
+#include <linux/lockd/nlm.h>
+
+/* Dummy declarations */
+struct svc_rqst;
+struct knfs_fh;
+struct svc_client;		/* opaque type */
+
+/*
+ * This is the set of functions for lockd->nfsd communication
+ */
+struct nlmsvc_binding {
+	void			(*exp_readlock)(void);
+	void			(*exp_unlock)(void);
+	struct svc_client *	(*exp_getclient)(struct sockaddr_in *);
+	u32			(*fopen)(struct svc_rqst *,
+						struct knfs_fh *,
+						struct file *);
+	void			(*fclose)(struct file *);
+	void			(*detach)(void);
+};
+
+extern struct nlmsvc_binding *	nlmsvc_ops;
+
+/*
+ * Functions exported by the lockd module
+ */
+extern void	nlmsvc_invalidate_client(struct svc_client *clnt);
+extern int	nlmclnt_proc(struct inode *, int, struct file_lock *);
+extern int	lockd_up(void);
+extern void	lockd_down(void);
+
+#endif /* LINUX_LOCKD_BIND_H */
diff --git a/include/linux/lockd/debug.h b/include/linux/lockd/debug.h
new file mode 100644
index 000000000..2a2f97a1f
--- /dev/null
+++ b/include/linux/lockd/debug.h
@@ -0,0 +1,51 @@
+/*
+ * linux/include/linux/lockd/debug.h
+ *
+ * Debugging stuff.
+ *
+ * Copyright (C) 1996 Olaf Kirch <okir@monad.swb.de>
+ */
+
+#ifndef LINUX_LOCKD_DEBUG_H
+#define LINUX_LOCKD_DEBUG_H
+
+#ifdef __KERNEL__
+
+#include <linux/sunrpc/debug.h>
+
+/*
+ * Enable lockd debugging.
+ * Requires RPC_DEBUG.
+ */
+#ifdef RPC_DEBUG
+# define LOCKD_DEBUG		1
+#endif
+
+#undef ifdebug
+#if defined(RPC_DEBUG) && defined(LOCKD_DEBUG)
+# define ifdebug(flag)		if (nlm_debug & NLMDBG_##flag)
+#else
+# define ifdebug(flag)		if (0)
+#endif
+
+#ifdef LOCKD_DEBUG
+char *		  nlm_procname(u32);
+#endif
+
+#endif /* __KERNEL__ */
+
+/*
+ * Debug flags
+ */
+#define NLMDBG_SVC		0x0001
+#define NLMDBG_CLIENT		0x0002
+#define NLMDBG_CLNTLOCK		0x0004
+#define NLMDBG_SVCLOCK		0x0008
+#define NLMDBG_MONITOR		0x0010
+#define NLMDBG_CLNTSUBS		0x0020
+#define NLMDBG_SVCSUBS		0x0040
+#define NLMDBG_HOSTCACHE	0x0080
+#define NLMDBG_ALL		0x7fff
+
+
+#endif /* LINUX_LOCKD_DEBUG_H */
diff --git a/include/linux/lockd/lockd.h b/include/linux/lockd/lockd.h
new file mode 100644
index 000000000..72035cc5c
--- /dev/null
+++ b/include/linux/lockd/lockd.h
@@ -0,0 +1,196 @@
+/*
+ * 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/fs.h>
+#include <linux/utsname.h>
+#include <linux/nfsd/nfsfh.h>
+#include <linux/lockd/bind.h>
+#include <linux/lockd/xdr.h>
+#include <linux/lockd/debug.h>
+
+/*
+ * Version string
+ */
+#define LOCKD_VERSION		"0.4"
+
+/*
+ * 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 nlm_host *	h_next;		/* linked list (hash table) */
+	struct sockaddr_in	h_addr;		/* peer address */
+	struct svc_client *	h_exportent;	/* NFS client */
+	struct rpc_clnt	*	h_rpcclnt;	/* RPC client to talk to peer */
+	char			h_name[20];	/* remote hostname */
+	u32			h_version;	/* interface version */
+	unsigned short		h_proto;	/* transport proto */
+	unsigned short		h_authflavor;	/* RPC authentication type */
+	unsigned short		h_reclaiming : 1,
+				h_inuse      : 1,
+				h_monitored  : 1;
+	struct wait_queue *	h_gracewait;	/* wait while reclaiming */
+	u32			h_state;	/* pseudo-state counter */
+	u32			h_nsmstate;	/* true remote NSM state */
+	unsigned int		h_count;	/* reference count */
+	struct semaphore	h_sema;		/* mutex for pmap binding */
+	unsigned long		h_nextrebind;	/* next portmap call */
+	unsigned long		h_expires;	/* eligible for GC */
+};
+
+/*
+ * Memory chunk for NLM client RPC request.
+ */
+#define NLMCLNT_OHSIZE		(sizeof(system_utsname.nodename)+10)
+struct nlm_rqst {
+	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 */
+	char			a_owner[NLMCLNT_OHSIZE];
+};
+
+/*
+ * This struct describes a file held open by lockd on behalf of
+ * an NFS client.
+ */
+struct nlm_file {
+	struct nlm_file *	f_next;		/* linked list */
+	struct knfs_fh		f_handle;	/* NFS file handle */
+	struct file		f_file;		/* VFS file pointer */
+	struct nlm_share *	f_shares;	/* DOS shares */
+	struct nlm_block *	f_blocks;	/* blocked locks */
+	unsigned int		f_locks;	/* guesstimate # of locks */
+	unsigned int		f_count;	/* reference count */
+	struct semaphore	f_sema;		/* 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)
+struct nlm_block {
+	struct nlm_block *	b_next;		/* linked list (all blocks) */
+	struct nlm_block *	b_fnext;	/* 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_queued;	/* re-queued */
+	unsigned char		b_granted;	/* VFS granted lock */
+	unsigned char		b_incall;	/* doing callback */
+	unsigned char		b_done;		/* callback complete */
+	struct nlm_file *	b_file;		/* file in question */
+};
+
+/*
+ * Valid actions for nlmsvc_traverse_files
+ */
+#define NLM_ACT_CHECK		0		/* check for locks */
+#define NLM_ACT_MARK		1		/* mark & sweep */
+#define NLM_ACT_UNLOCK		2		/* release all locks */
+
+/*
+ * Global variables
+ */
+extern struct rpc_program	nlm_program;
+extern struct svc_procedure	nlmsvc_procedures[];
+extern unsigned long		nlmsvc_grace_period;
+extern unsigned long		nlmsvc_timeout;
+
+/*
+ * Lockd client functions
+ */
+struct nlm_rqst * nlmclnt_alloc_call(void);
+int		  nlmclnt_call(struct nlm_rqst *, u32);
+int		  nlmclnt_async_call(struct nlm_rqst *, u32, rpc_action);
+int		  nlmclnt_block(struct nlm_host *, struct file_lock *, u32 *);
+int		  nlmclnt_cancel(struct nlm_host *, struct file_lock *);
+u32		  nlmclnt_grant(struct nlm_lock *);
+void		  nlmclnt_recovery(struct nlm_host *, u32);
+int		  nlmclnt_reclaim(struct nlm_host *, struct file_lock *);
+int		  nlmclnt_setgrantargs(struct nlm_rqst *, struct nlm_lock *);
+void		  nlmclnt_freegrantargs(struct nlm_rqst *);
+
+/*
+ * Host cache
+ */
+struct nlm_host * nlmclnt_lookup_host(struct sockaddr_in *, int, int);
+struct nlm_host * nlmsvc_lookup_host(struct svc_rqst *);
+struct nlm_host * nlm_lookup_host(struct svc_client *,
+					struct sockaddr_in *, int, int);
+struct rpc_clnt * nlm_bind_host(struct nlm_host *);
+void		  nlm_rebind_host(struct nlm_host *);
+void		  nlm_release_host(struct nlm_host *);
+void		  nlm_shutdown_hosts(void);
+
+/*
+ * Server-side lock handling
+ */
+u32		  nlmsvc_lock(struct svc_rqst *, struct nlm_file *,
+					struct nlm_lock *, int, u32);
+u32		  nlmsvc_unlock(struct nlm_file *, struct nlm_lock *);
+u32		  nlmsvc_testlock(struct nlm_file *, struct nlm_lock *,
+					struct nlm_lock *);
+u32		  nlmsvc_cancel_blocked(struct nlm_file *, struct nlm_lock *);
+unsigned long	  nlmsvc_retry_blocked(void);
+int		  nlmsvc_traverse_blocks(struct nlm_host *, struct nlm_file *,
+					int action);
+
+/*
+ * File handling for the server personality
+ */
+u32		  nlm_lookup_file(struct svc_rqst *, struct nlm_file **,
+					struct nfs_fh *);
+void		  nlm_release_file(struct nlm_file *);
+void		  nlmsvc_mark_resources(void);
+void		  nlmsvc_free_host_resources(struct nlm_host *);
+
+extern __inline__ struct inode *
+nlmsvc_file_inode(struct nlm_file *file)
+{
+	return file->f_file.f_inode;
+}
+
+/*
+ * Compare two host addresses (needs modifying for ipv6)
+ */
+extern __inline__ int
+nlm_cmp_addr(struct sockaddr_in *sin1, struct sockaddr_in *sin2)
+{
+	return sin1->sin_addr.s_addr == sin2->sin_addr.s_addr;
+}
+
+/*
+ * Compare two NLM locks.
+ * When the second lock is of type F_UNLCK, this acts like a wildcard.
+ */
+extern __inline__ int
+nlm_compare_locks(struct file_lock *fl1, struct file_lock *fl2)
+{
+	return	fl1->fl_pid   == fl2->fl_pid
+	     && fl1->fl_start == fl2->fl_start
+	     && fl1->fl_end   == fl2->fl_end
+	     &&(fl1->fl_type  == fl2->fl_type || fl2->fl_type == F_UNLCK);
+}
+
+#endif /* __KERNEL__ */
+
+#endif /* LINUX_LOCKD_LOCKD_H */
diff --git a/include/linux/lockd/nlm.h b/include/linux/lockd/nlm.h
new file mode 100644
index 000000000..ca606fca2
--- /dev/null
+++ b/include/linux/lockd/nlm.h
@@ -0,0 +1,52 @@
+/*
+ * linux/include/linux/lockd/nlm.h
+ *
+ * Declarations for the Network Lock Manager protocol.
+ *
+ * Copyright (C) 1996, Olaf Kirch <okir@monad.swb.de>
+ */
+
+#ifndef LINUX_LOCKD_NLM_H
+#define LINUX_LOCKD_NLM_H
+
+/* Maximum file offset in file_lock.fl_end */
+#ifdef OFFSET_MAX
+# define NLM_OFFSET_MAX		OFFSET_MAX
+#else
+# define NLM_OFFSET_MAX		((off_t) 0x7fffffff)
+#endif
+
+/* Return states for NLM */
+enum {
+	NLM_LCK_GRANTED = 0,
+	NLM_LCK_DENIED,
+	NLM_LCK_DENIED_NOLOCKS,
+	NLM_LCK_BLOCKED,
+	NLM_LCK_DENIED_GRACE_PERIOD,
+};
+
+#define NLM_PROGRAM		100021
+
+#define NLMPROC_NULL		0
+#define NLMPROC_TEST		1
+#define NLMPROC_LOCK		2
+#define NLMPROC_CANCEL		3
+#define NLMPROC_UNLOCK		4
+#define NLMPROC_GRANTED		5
+#define NLMPROC_TEST_MSG	6
+#define NLMPROC_LOCK_MSG	7
+#define NLMPROC_CANCEL_MSG	8
+#define NLMPROC_UNLOCK_MSG	9
+#define NLMPROC_GRANTED_MSG	10
+#define NLMPROC_TEST_RES	11
+#define NLMPROC_LOCK_RES	12
+#define NLMPROC_CANCEL_RES	13
+#define NLMPROC_UNLOCK_RES	14
+#define NLMPROC_GRANTED_RES	15
+#define NLMPROC_SHARE		20
+#define NLMPROC_UNSHARE		21
+#define NLMPROC_NM_LOCK		22
+#define NLMPROC_FREE_ALL	23
+#define NLMPROC_NSM_NOTIFY	24		/* statd callback */
+
+#endif /* LINUX_LOCKD_NLM_H */
diff --git a/include/linux/lockd/share.h b/include/linux/lockd/share.h
new file mode 100644
index 000000000..5d8aa325f
--- /dev/null
+++ b/include/linux/lockd/share.h
@@ -0,0 +1,30 @@
+/*
+ * linux/include/linux/lockd/share.h
+ *
+ * DOS share management for lockd.
+ *
+ * Copyright (C) 1996, Olaf Kirch <okir@monad.swb.de>
+ */
+
+#ifndef LINUX_LOCKD_SHARE_H
+#define LINUX_LOCKD_SHARE_H
+
+/*
+ * DOS share for a specific file
+ */
+struct nlm_share {
+	struct nlm_share *	s_next;		/* linked list */
+	struct nlm_host *	s_host;		/* client host */
+	struct nlm_file *	s_file;		/* shared file */
+	struct xdr_netobj	s_owner;	/* owner handle */
+	u32			s_access;	/* access mode */
+	u32			s_mode;		/* deny mode */
+};
+
+u32	nlmsvc_share_file(struct nlm_host *, struct nlm_file *,
+					       struct nlm_args *);
+u32	nlmsvc_unshare_file(struct nlm_host *, struct nlm_file *,
+					       struct nlm_args *);
+int	nlmsvc_traverse_shares(struct nlm_host *, struct nlm_file *, int);
+
+#endif /* LINUX_LOCKD_SHARE_H */
diff --git a/include/linux/lockd/sm_inter.h b/include/linux/lockd/sm_inter.h
new file mode 100644
index 000000000..d93b07466
--- /dev/null
+++ b/include/linux/lockd/sm_inter.h
@@ -0,0 +1,45 @@
+/*
+ * linux/include/linux/lockd/sm_inter.h
+ *
+ * Declarations for the kernel statd client.
+ *
+ * Copyright (C) 1996, Olaf Kirch <okir@monad.swb.de>
+ */
+
+#ifndef LINUX_LOCKD_SM_INTER_H
+#define LINUX_LOCKD_SM_INTER_H
+
+#define SM_PROGRAM	100024
+#define SM_VERSION	1
+#define SM_STAT		1
+#define SM_MON		2
+#define SM_UNMON	3
+#define SM_UNMON_ALL	4
+#define SM_SIMU_CRASH	5
+#define SM_NOTIFY	6
+
+#define SM_MAXSTRLEN	1024
+
+/*
+ * Arguments for all calls to statd
+ */
+struct nsm_args {
+	u32		addr;		/* remote address */
+	u32		prog;		/* RPC callback info */
+	u32		vers;
+	u32		proc;
+};
+
+/*
+ * Result returned by statd
+ */
+struct nsm_res {
+	u32		status;
+	u32		state;
+};
+
+int		nsm_monitor(struct nlm_host *);
+int		nsm_unmonitor(struct nlm_host *);
+extern u32	nsm_local_state;
+
+#endif /* LINUX_LOCKD_SM_INTER_H */
diff --git a/include/linux/lockd/xdr.h b/include/linux/lockd/xdr.h
new file mode 100644
index 000000000..631a8fba8
--- /dev/null
+++ b/include/linux/lockd/xdr.h
@@ -0,0 +1,86 @@
+/*
+ * linux/include/linux/lockd/xdr.h
+ *
+ * XDR types for the NLM protocol
+ *
+ * Copyright (C) 1996 Olaf Kirch <okir@monad.swb.de>
+ */
+
+#ifndef LOCKD_XDR_H
+#define LOCKD_XDR_H
+
+#include <linux/fs.h>
+#include <linux/nfs.h>
+#include <linux/sunrpc/xdr.h>
+
+extern u32	nlm_granted, nlm_lck_denied, nlm_lck_denied_nolocks,
+		nlm_lck_blocked, nlm_lck_denied_grace_period;
+
+/* Lock info passed via NLM */
+struct nlm_lock {
+	char *			caller;
+	struct nfs_fh		fh;
+	struct xdr_netobj	oh;
+	struct file_lock	fl;
+};
+
+/*
+ * Generic lockd arguments for all but sm_notify
+ */
+struct nlm_args {
+	u32			cookie;
+	struct nlm_lock		lock;
+	u32			block;
+	u32			reclaim;
+	u32			state;
+	u32			monitor;
+	u32			fsm_access;
+	u32			fsm_mode;
+};
+
+/*
+ * Generic lockd result
+ */
+struct nlm_res {
+	u32			cookie;
+	u32			status;
+	struct nlm_lock		lock;
+};
+
+/*
+ * statd callback when client has rebooted
+ */
+struct nlm_reboot {
+	char *		mon;
+	int		len;
+	u32		state;
+	u32		addr;
+};
+
+/*
+ * Contents of statd callback when monitored host rebooted
+ */
+#define NLMSVC_XDRSIZE		sizeof(struct nlm_args)
+
+void	nlmxdr_init(void);
+int	nlmsvc_decode_testargs(struct svc_rqst *, u32 *, struct nlm_args *);
+int	nlmsvc_encode_testres(struct svc_rqst *, u32 *, struct nlm_res *);
+int	nlmsvc_decode_lockargs(struct svc_rqst *, u32 *, struct nlm_args *);
+int	nlmsvc_decode_cancargs(struct svc_rqst *, u32 *, struct nlm_args *);
+int	nlmsvc_decode_unlockargs(struct svc_rqst *, u32 *, struct nlm_args *);
+int	nlmsvc_encode_res(struct svc_rqst *, u32 *, struct nlm_res *);
+int	nlmsvc_decode_res(struct svc_rqst *, u32 *, struct nlm_res *);
+int	nlmsvc_encode_void(struct svc_rqst *, u32 *, void *);
+int	nlmsvc_decode_void(struct svc_rqst *, u32 *, void *);
+int	nlmsvc_decode_shareargs(struct svc_rqst *, u32 *, struct nlm_args *);
+int	nlmsvc_encode_shareres(struct svc_rqst *, u32 *, struct nlm_res *);
+int	nlmsvc_decode_notify(struct svc_rqst *, u32 *, struct nlm_args *);
+int	nlmsvc_decode_reboot(struct svc_rqst *, u32 *, struct nlm_reboot *);
+/*
+int	nlmclt_encode_testargs(struct rpc_rqst *, u32 *, struct nlm_args *);
+int	nlmclt_encode_lockargs(struct rpc_rqst *, u32 *, struct nlm_args *);
+int	nlmclt_encode_cancargs(struct rpc_rqst *, u32 *, struct nlm_args *);
+int	nlmclt_encode_unlockargs(struct rpc_rqst *, u32 *, struct nlm_args *);
+ */
+
+#endif /* LOCKD_XDR_H */