BSD 4.4 Lite Kernel Sources

1 files changed, 297 insertions, 0 deletions

diff --git a/sys/nfs/nfs.h b/sys/nfs/nfs.h
new file mode 100644
index 0000000..261fd42
--- /dev/null
+++ b/sys/nfs/nfs.h
@@ -0,0 +1,297 @@
+/*
+ * Copyright (c) 1989, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Rick Macklem at The University of Guelph.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *	@(#)nfs.h	8.1 (Berkeley) 6/10/93
+ */
+
+/*
+ * Tunable constants for nfs
+ */
+
+#define	NFS_MAXIOVEC	34
+#define NFS_HZ		25		/* Ticks per second for NFS timeouts */
+#define	NFS_TIMEO	(1*NFS_HZ)	/* Default timeout = 1 second */
+#define	NFS_MINTIMEO	(1*NFS_HZ)	/* Min timeout to use */
+#define	NFS_MAXTIMEO	(60*NFS_HZ)	/* Max timeout to backoff to */
+#define	NFS_MINIDEMTIMEO (5*NFS_HZ)	/* Min timeout for non-idempotent ops*/
+#define	NFS_MAXREXMIT	100		/* Stop counting after this many */
+#define	NFS_MAXWINDOW	1024		/* Max number of outstanding requests */
+#define	NFS_RETRANS	10		/* Num of retrans for soft mounts */
+#define	NFS_MAXGRPS	16		/* Max. size of groups list */
+#define	NFS_MINATTRTIMO 5		/* Attribute cache timeout in sec */
+#define	NFS_MAXATTRTIMO 60
+#define	NFS_WSIZE	8192		/* Def. write data size <= 8192 */
+#define	NFS_RSIZE	8192		/* Def. read data size <= 8192 */
+#define	NFS_DEFRAHEAD	1		/* Def. read ahead # blocks */
+#define	NFS_MAXRAHEAD	4		/* Max. read ahead # blocks */
+#define	NFS_MAXREADDIR	NFS_MAXDATA	/* Max. size of directory read */
+#define	NFS_MAXUIDHASH	64		/* Max. # of hashed uid entries/mp */
+#define	NFS_MAXASYNCDAEMON 20	/* Max. number async_daemons runable */
+#define	NFS_DIRBLKSIZ	1024		/* Size of an NFS directory block */
+#define	NMOD(a)		((a) % nfs_asyncdaemons)
+
+/*
+ * Set the attribute timeout based on how recently the file has been modified.
+ */
+#define	NFS_ATTRTIMEO(np) \
+	((((np)->n_flag & NMODIFIED) || \
+	 (time.tv_sec - (np)->n_mtime) / 10 < NFS_MINATTRTIMO) ? NFS_MINATTRTIMO : \
+	 ((time.tv_sec - (np)->n_mtime) / 10 > NFS_MAXATTRTIMO ? NFS_MAXATTRTIMO : \
+	  (time.tv_sec - (np)->n_mtime) / 10))
+
+/*
+ * Structures for the nfssvc(2) syscall. Not that anyone but nfsd and mount_nfs
+ * should ever try and use it.
+ */
+struct nfsd_args {
+	int	sock;		/* Socket to serve */
+	caddr_t	name;		/* Client address for connection based sockets */
+	int	namelen;	/* Length of name */
+};
+
+struct nfsd_srvargs {
+	struct nfsd	*nsd_nfsd;	/* Pointer to in kernel nfsd struct */
+	uid_t		nsd_uid;	/* Effective uid mapped to cred */
+	u_long		nsd_haddr;	/* Ip address of client */
+	struct ucred	nsd_cr;		/* Cred. uid maps to */
+	int		nsd_authlen;	/* Length of auth string (ret) */
+	char		*nsd_authstr;	/* Auth string (ret) */
+};
+
+struct nfsd_cargs {
+	char		*ncd_dirp;	/* Mount dir path */
+	uid_t		ncd_authuid;	/* Effective uid */
+	int		ncd_authtype;	/* Type of authenticator */
+	int		ncd_authlen;	/* Length of authenticator string */
+	char		*ncd_authstr;	/* Authenticator string */
+};
+
+/*
+ * Stats structure
+ */
+struct nfsstats {
+	int	attrcache_hits;
+	int	attrcache_misses;
+	int	lookupcache_hits;
+	int	lookupcache_misses;
+	int	direofcache_hits;
+	int	direofcache_misses;
+	int	biocache_reads;
+	int	read_bios;
+	int	read_physios;
+	int	biocache_writes;
+	int	write_bios;
+	int	write_physios;
+	int	biocache_readlinks;
+	int	readlink_bios;
+	int	biocache_readdirs;
+	int	readdir_bios;
+	int	rpccnt[NFS_NPROCS];
+	int	rpcretries;
+	int	srvrpccnt[NFS_NPROCS];
+	int	srvrpc_errs;
+	int	srv_errs;
+	int	rpcrequests;
+	int	rpctimeouts;
+	int	rpcunexpected;
+	int	rpcinvalid;
+	int	srvcache_inproghits;
+	int	srvcache_idemdonehits;
+	int	srvcache_nonidemdonehits;
+	int	srvcache_misses;
+	int	srvnqnfs_leases;
+	int	srvnqnfs_maxleases;
+	int	srvnqnfs_getleases;
+};
+
+/*
+ * Flags for nfssvc() system call.
+ */
+#define	NFSSVC_BIOD	0x002
+#define	NFSSVC_NFSD	0x004
+#define	NFSSVC_ADDSOCK	0x008
+#define	NFSSVC_AUTHIN	0x010
+#define	NFSSVC_GOTAUTH	0x040
+#define	NFSSVC_AUTHINFAIL 0x080
+#define	NFSSVC_MNTD	0x100
+
+/*
+ * The set of signals the interrupt an I/O in progress for NFSMNT_INT mounts.
+ * What should be in this set is open to debate, but I believe that since
+ * I/O system calls on ufs are never interrupted by signals the set should
+ * be minimal. My reasoning is that many current programs that use signals
+ * such as SIGALRM will not expect file I/O system calls to be interrupted
+ * by them and break.
+ */
+#ifdef KERNEL
+#define	NFSINT_SIGMASK	(sigmask(SIGINT)|sigmask(SIGTERM)|sigmask(SIGKILL)| \
+			 sigmask(SIGHUP)|sigmask(SIGQUIT))
+
+/*
+ * Socket errors ignored for connectionless sockets??
+ * For now, ignore them all
+ */
+#define	NFSIGNORE_SOERROR(s, e) \
+		((e) != EINTR && (e) != ERESTART && (e) != EWOULDBLOCK && \
+		((s) & PR_CONNREQUIRED) == 0)
+
+/*
+ * Nfs outstanding request list element
+ */
+struct nfsreq {
+	struct nfsreq	*r_next;
+	struct nfsreq	*r_prev;
+	struct mbuf	*r_mreq;
+	struct mbuf	*r_mrep;
+	struct mbuf	*r_md;
+	caddr_t		r_dpos;
+	struct nfsmount *r_nmp;
+	struct vnode	*r_vp;
+	u_long		r_xid;
+	int		r_flags;	/* flags on request, see below */
+	int		r_retry;	/* max retransmission count */
+	int		r_rexmit;	/* current retrans count */
+	int		r_timer;	/* tick counter on reply */
+	int		r_procnum;	/* NFS procedure number */
+	int		r_rtt;		/* RTT for rpc */
+	struct proc	*r_procp;	/* Proc that did I/O system call */
+};
+
+/* Flag values for r_flags */
+#define R_TIMING	0x01		/* timing request (in mntp) */
+#define R_SENT		0x02		/* request has been sent */
+#define	R_SOFTTERM	0x04		/* soft mnt, too many retries */
+#define	R_INTR		0x08		/* intr mnt, signal pending */
+#define	R_SOCKERR	0x10		/* Fatal error on socket */
+#define	R_TPRINTFMSG	0x20		/* Did a tprintf msg. */
+#define	R_MUSTRESEND	0x40		/* Must resend request */
+#define	R_GETONEREP	0x80		/* Probe for one reply only */
+
+struct nfsstats nfsstats;
+
+/*
+ * A list of nfssvc_sock structures is maintained with all the sockets
+ * that require service by the nfsd.
+ * The nfsuid structs hang off of the nfssvc_sock structs in both lru
+ * and uid hash lists.
+ */
+#define	NUIDHASHSIZ	32
+#define	NUIDHASH(uid)	((uid) & (NUIDHASHSIZ - 1))
+
+/*
+ * Network address hash list element
+ */
+union nethostaddr {
+	u_long had_inetaddr;
+	struct mbuf *had_nam;
+};
+
+struct nfsuid {
+	struct nfsuid	*nu_lrunext;	/* MUST be first */
+	struct nfsuid	*nu_lruprev;
+	struct nfsuid	*nu_hnext;
+	struct nfsuid	*nu_hprev;
+	int		nu_flag;	/* Flags */
+	uid_t		nu_uid;		/* Uid mapped by this entry */
+	union nethostaddr nu_haddr;	/* Host addr. for dgram sockets */
+	struct ucred	nu_cr;		/* Cred uid mapped to */
+};
+
+#define	nu_inetaddr	nu_haddr.had_inetaddr
+#define	nu_nam		nu_haddr.had_nam
+/* Bits for nu_flag */
+#define	NU_INETADDR	0x1
+
+struct nfssvc_sock {
+	struct nfsuid	*ns_lrunext;	/* MUST be first */
+	struct nfsuid	*ns_lruprev;
+	struct nfssvc_sock *ns_next;
+	struct nfssvc_sock *ns_prev;
+	int		ns_flag;
+	u_long		ns_sref;
+	struct file	*ns_fp;
+	struct socket	*ns_so;
+	int		ns_solock;
+	struct mbuf	*ns_nam;
+	int		ns_cc;
+	struct mbuf	*ns_raw;
+	struct mbuf	*ns_rawend;
+	int		ns_reclen;
+	struct mbuf	*ns_rec;
+	struct mbuf	*ns_recend;
+	int		ns_numuids;
+	struct nfsuid	*ns_uidh[NUIDHASHSIZ];
+};
+
+/* Bits for "ns_flag" */
+#define	SLP_VALID	0x01
+#define	SLP_DOREC	0x02
+#define	SLP_NEEDQ	0x04
+#define	SLP_DISCONN	0x08
+#define	SLP_GETSTREAM	0x10
+#define	SLP_INIT	0x20
+#define	SLP_WANTINIT	0x40
+
+#define SLP_ALLFLAGS	0xff
+
+/*
+ * One of these structures is allocated for each nfsd.
+ */
+struct nfsd {
+	struct nfsd	*nd_next;	/* Must be first */
+	struct nfsd	*nd_prev;
+	int		nd_flag;	/* NFSD_ flags */
+	struct nfssvc_sock *nd_slp;	/* Current socket */
+	struct mbuf	*nd_nam;	/* Client addr for datagram req. */
+	struct mbuf	*nd_mrep;	/* Req. mbuf list */
+	struct mbuf	*nd_md;
+	caddr_t		nd_dpos;	/* Position in list */
+	int		nd_procnum;	/* RPC procedure number */
+	u_long		nd_retxid;	/* RPC xid */
+	int		nd_repstat;	/* Reply status value */
+	struct ucred	nd_cr;		/* Credentials for req. */
+	int		nd_nqlflag;	/* Leasing flag */
+	int		nd_duration;	/* Lease duration */
+	int		nd_authlen;	/* Authenticator len */
+	u_char		nd_authstr[RPCAUTH_MAXSIZ]; /* Authenticator data */
+	struct proc	*nd_procp;	/* Proc ptr */
+};
+
+#define	NFSD_WAITING	0x01
+#define	NFSD_CHECKSLP	0x02
+#define	NFSD_REQINPROG	0x04
+#define	NFSD_NEEDAUTH	0x08
+#define	NFSD_AUTHFAIL	0x10
+#endif	/* KERNEL */