NFS update; fix STM32 enabling of CAN2 clock

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@4494 42af7a65-404d-4744-a932-0658087f49c3

1 files changed, 360 insertions, 0 deletions

diff --git a/nuttx/fs/nfs/nfs.h b/nuttx/fs/nfs/nfs.h
new file mode 100644
index 000000000..a5092e07a
--- /dev/null
+++ b/nuttx/fs/nfs/nfs.h
@@ -0,0 +1,360 @@
+/*
+ * Copyright (c) 1989, 1993, 1995
+ *      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. 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       8.4 (Berkeley) 5/1/95
+ */
+
+#ifndef _NFS_NFS_H_
+#define _NFS_NFS_H_
+
+#define NFS_TICKINTVL      5     /* Desired time for a tick (msec) */
+#define NFS_HZ             (CLOCKS_PER_SEC / nfs_ticks)  /* Ticks/sec */
+#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_TIMEOUTMUL     2     /* Timeout/Delay multiplier */
+#define NFS_MAXREXMIT      100   /* Stop counting after this many */
+#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_READDIRSIZE    8192  /* Def. readdir size */
+#define NFS_DEFRAHEAD      1     /* Def. read ahead # blocks */
+#define NFS_MAXRAHEAD      4     /* Max. read ahead # blocks */
+#define NFS_MAXASYNCDAEMON 20    /* Max. number async_daemons runable */
+
+/* Ideally, NFS_DIRBLKSIZ should be bigger, but I've seen servers with
+ * broken NFS/ethernet drivers that won't work with anything bigger (Linux..)
+ */
+ 
+#define NFS_DIRBLKSIZ   1024  /* Must be a multiple of DIRBLKSIZ */
+#define NFS_READDIRBLKSIZ       512   /* Size of read dir blocks. XXX */
+
+/*
+ * Oddballs
+ */
+
+#define NFS_CMPFH(n, f, s) \
+    ((n)->n_fhsize == (s) && !bcmp((void *)(n)->n_fhp, (void *)(f), (s)))
+#define NFS_ISV3(v)     (VFSTONFS((v)->v_mount)->nm_flag & NFSMNT_NFSV3)
+#define NFS_SRVMAXDATA(n) \
+    (((n)->nd_flag & ND_NFSV3) ? (((n)->nd_nam2) ? \
+    NFS_MAXDGRAMDATA : NFS_MAXDATA) : NFS_V2MAXDATA)
+
+/*
+ * sys/malloc.h needs M_NFSDIROFF, M_NFSRVDESC and M_NFSBIGFH added.
+ */
+
+#ifndef M_NFSRVDESC
+#  define M_NFSRVDESC     M_TEMP
+#endif
+#ifndef M_NFSDIROFF
+#  define M_NFSDIROFF     M_TEMP
+#endif
+#ifndef M_NFSBIGFH
+#  define M_NFSBIGFH      M_TEMP
+#endif
+
+/*
+ * The B_INVAFTERWRITE flag should be set to whatever is required by the
+ * buffer cache code to say "Invalidate the block after it is written back".
+ */
+
+#define B_INVAFTERWRITE B_INVAL
+
+/*
+ * Structures for the nfssvc(2) syscall.
+ * Not that anyone besides nfsd(8) should ever use it.
+ */
+
+struct nfsd_args
+{
+  int sock;                   /* Socket to serve */
+  void *name;                 /* Client addr 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 */
+  uint32_t nsd_haddr;         /* IP address of client */
+  int nsd_authlen;            /* Length of auth string (ret) */
+  unsigned char *nsd_authstr; /* Auth string (ret) */
+  int nsd_verflen;            /* and the verifier */
+  unsigned char *nsd_verfstr;
+  struct timeval nsd_timestamp;       /* timestamp from verifier */
+  uint32_t nsd_ttl;           /* credential ttl (sec) */
+};
+
+/*
+ * Stats structure
+ */
+
+struct nfsstats
+{
+  uint64_t attrcache_hits;
+  uint64_t attrcache_misses;
+  uint64_t lookupcache_hits;
+  uint64_t lookupcache_misses;
+  uint64_t direofcache_hits;
+  uint64_t direofcache_misses;
+  uint64_t biocache_reads;
+  uint64_t read_bios;
+  uint64_t read_physios;
+  uint64_t biocache_writes;
+  uint64_t write_bios;
+  uint64_t write_physios;
+  uint64_t biocache_readlinks;
+  uint64_t readlink_bios;
+  uint64_t biocache_readdirs;
+  uint64_t readdir_bios;
+  uint64_t rpccnt[NFS_NPROCS];
+  uint64_t rpcretries;
+  uint64_t srvrpccnt[NFS_NPROCS];
+  uint64_t srvrpc_errs;
+  uint64_t srv_errs;
+  uint64_t rpcrequests;
+  uint64_t rpctimeouts;
+  uint64_t rpcunexpected;
+  uint64_t rpcinvalid;
+  uint64_t srvcache_inproghits;
+  uint64_t srvcache_idemdonehits;
+  uint64_t srvcache_nonidemdonehits;
+  uint64_t srvcache_misses;
+  uint64_t forcedsync;
+  uint64_t srvnqnfs_leases;
+  uint64_t srvnqnfs_maxleases;
+  uint64_t srvnqnfs_getleases;
+  uint64_t srvvop_writes;
+};
+
+/*
+ * 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
+
+/*
+ * fs.nfs sysctl(3) identifiers
+ */
+
+#define NFS_NFSSTATS    1     /* struct: struct nfsstats */
+#define NFS_NIOTHREADS  2     /* number of i/o threads */
+#define NFS_MAXID       3
+
+#define FS_NFS_NAMES { \
+    { 0, 0 }, \
+    { "nfsstats", CTLTYPE_STRUCT }, \
+    { "iothreads", CTLTYPE_INT } \
+}
+
+/*
+ * 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
+extern int nfs_niothreads;
+
+struct uio;
+struct buf;
+struct vattr;
+struct nameidata;               /* XXX */
+
+#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
+{
+  dq_entry_t r_chain;
+  void *r_dpos;
+  struct nfsmount *r_nmp;
+  uint32_t r_xid;
+  int r_flags;                /* flags on request, see below */
+  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 */
+};
+
+/* 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 */
+
+/*
+ * On fast networks, the estimator will try to reduce the
+ * timeout lower than the latency of the server's disks,
+ * which results in too many timeouts, so cap the lower
+ * bound.
+ */
+
+#define NFS_MINRTO      (NFS_HZ >> 2)
+
+/*
+ * Keep the RTO from increasing to unreasonably large values
+ * when a server is not responding.
+ */
+#define NFS_MAXRTO      (20 * NFS_HZ)
+
+enum nfs_rto_timers
+{
+  NFS_DEFAULT_TIMER,
+  NFS_GETATTR_TIMER,
+  NFS_LOOKUP_TIMER,
+  NFS_READ_TIMER,
+  NFS_WRITE_TIMER,
+};
+
+#define NFS_MAX_TIMER   (NFS_WRITE_TIMER)
+#define NFS_INITRTT     (NFS_HZ << 3)
+
+/*
+ * Network address hash list element
+ */
+
+union nethostaddr
+{
+  u_int32_t had_inetaddr;
+  struct mbuf *had_nam;
+};
+
+struct nfssvc_sock
+{
+  TAILQ_ENTRY(nfssvc_sock) ns_chain;  /* List of all nfssvc_sock's */
+  struct file *ns_fp;         /* fp from the... */
+  struct socket *ns_so;       /* ...socket this struct wraps */
+  struct mbuf *ns_nam;        /* MT_SONAME of client */
+  struct mbuf *ns_raw;        /* head of unpeeked mbufs */
+  struct mbuf *ns_rawend;     /* tail of unpeeked mbufs */
+  struct mbuf *ns_rec;        /* queued RPC records */
+  struct mbuf *ns_recend;     /* last queued RPC record */
+  struct mbuf *ns_frag;       /* end of record fragment */
+  int ns_flag;                /* socket status flags */
+  int ns_solock;              /* lock for connected socket */
+  int ns_cc;                  /* actual chars queued */
+  int ns_reclen;              /* length of first queued record */
+  u_int32_t ns_sref;          /* # of refs to this struct */
+};
+
+/* Bits for "ns_flag" */
+
+#define SLP_VALID       0x01/* connection is usable */
+#define SLP_DOREC       0x02/* receive operation required */
+#define SLP_NEEDQ       0x04/* connection has data to queue from socket */
+#define SLP_DISCONN     0x08/* connection is closed */
+#define SLP_GETSTREAM   0x10/* extracting RPC from TCP connection */
+#define SLP_LASTFRAG    0x20/* last fragment received on TCP connection */
+#define SLP_ALLFLAGS    0xff/* convenience */
+
+extern TAILQ_HEAD(nfssvc_sockhead, nfssvc_sock) nfssvc_sockhead;
+extern int nfssvc_sockhead_flag;
+
+#define SLP_INIT        0x01/* NFS data undergoing initialization */
+#define SLP_WANTINIT    0x02/* thread waiting on NFS initialization */
+
+/*
+ * One of these structures is allocated for each nfsd.
+ */
+
+struct nfsd
+{
+  TAILQ_ENTRY(nfsd) nfsd_chain;  /* List of all nfsd's */
+  int nfsd_flag;         /* NFSD_ flags */
+  struct nfssvc_sock *nfsd_slp;  /* Current socket */
+  struct nfsrv_descript *nfsd_nd;        /* Associated nfsrv_descript */
+};
+
+/* Bits for "nfsd_flag" */
+
+#define NFSD_WAITING    0x01
+#define NFSD_REQINPROG  0x02
+#define NFSD_NEEDAUTH   0x04
+#define NFSD_AUTHFAIL   0x08
+
+/*
+ * This structure is used by the server for describing each request.
+ */
+
+struct nfsrv_descript
+{
+  unsigned int nd_procnum;       /* RPC # */
+  int nd_flag;           /* nd_flag */
+  int nd_repstat;        /* Reply status */
+  u_int32_t nd_retxid;   /* Reply xid */
+};
+
+/* Bits for "nd_flag" */
+
+#define ND_NFSV3        0x08
+
+extern struct pool nfsreqpl;
+extern struct pool nfs_node_pool;
+extern TAILQ_HEAD(nfsdhead, nfsd) nfsd_head;
+extern int nfsd_head_flag;
+
+#define NFSD_CHECKSLP   0x01
+
+#endif /* _KERNEL */
+#endif /* _NFS_NFS_H */