The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]

FreeBSD/Linux Kernel Cross Reference
sys/nfsclient/nfsnode.h

Version: -  FREEBSD  -  FREEBSD-12-STABLE  -  FREEBSD-12-0  -  FREEBSD-11-STABLE  -  FREEBSD-11-2  -  FREEBSD-11-1  -  FREEBSD-11-0  -  FREEBSD-10-STABLE  -  FREEBSD-10-4  -  FREEBSD-10-3  -  FREEBSD-10-2  -  FREEBSD-10-1  -  FREEBSD-10-0  -  FREEBSD-9-STABLE  -  FREEBSD-9-3  -  FREEBSD-9-2  -  FREEBSD-9-1  -  FREEBSD-9-0  -  FREEBSD-8-STABLE  -  FREEBSD-8-4  -  FREEBSD-8-3  -  FREEBSD-8-2  -  FREEBSD-8-1  -  FREEBSD-8-0  -  FREEBSD-7-STABLE  -  FREEBSD-7-4  -  FREEBSD-7-3  -  FREEBSD-7-2  -  FREEBSD-7-1  -  FREEBSD-7-0  -  FREEBSD-6-STABLE  -  FREEBSD-6-4  -  FREEBSD-6-3  -  FREEBSD-6-2  -  FREEBSD-6-1  -  FREEBSD-6-0  -  FREEBSD-5-STABLE  -  FREEBSD-5-5  -  FREEBSD-5-4  -  FREEBSD-5-3  -  FREEBSD-5-2  -  FREEBSD-5-1  -  FREEBSD-5-0  -  FREEBSD-4-STABLE  -  FREEBSD-3-STABLE  -  FREEBSD22  -  linux-2.6  -  linux-2.4.22  -  MK83  -  MK84  -  PLAN9  -  DFBSD  -  NETBSD  -  NETBSD5  -  NETBSD4  -  NETBSD3  -  NETBSD20  -  OPENBSD  -  xnu-517  -  xnu-792  -  xnu-792.6.70  -  xnu-1228  -  xnu-1456.1.26  -  xnu-1699.24.8  -  xnu-2050.18.24  -  OPENSOLARIS  -  minix-3-1-1 
SearchContext: -  none  -  3  -  10 

    1 /*
    2  * Copyright (c) 1989, 1993
    3  *      The Regents of the University of California.  All rights reserved.
    4  *
    5  * This code is derived from software contributed to Berkeley by
    6  * Rick Macklem at The University of Guelph.
    7  *
    8  * Redistribution and use in source and binary forms, with or without
    9  * modification, are permitted provided that the following conditions
   10  * are met:
   11  * 1. Redistributions of source code must retain the above copyright
   12  *    notice, this list of conditions and the following disclaimer.
   13  * 2. Redistributions in binary form must reproduce the above copyright
   14  *    notice, this list of conditions and the following disclaimer in the
   15  *    documentation and/or other materials provided with the distribution.
   16  * 3. All advertising materials mentioning features or use of this software
   17  *    must display the following acknowledgement:
   18  *      This product includes software developed by the University of
   19  *      California, Berkeley and its contributors.
   20  * 4. Neither the name of the University nor the names of its contributors
   21  *    may be used to endorse or promote products derived from this software
   22  *    without specific prior written permission.
   23  *
   24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   34  * SUCH DAMAGE.
   35  *
   36  *      @(#)nfsnode.h   8.9 (Berkeley) 5/14/95
   37  * $FreeBSD: releng/5.1/sys/nfsclient/nfsnode.h 95590 2002-04-27 22:10:16Z iedowse $
   38  */
   39 
   40 #ifndef _NFSCLIENT_NFSNODE_H_
   41 #define _NFSCLIENT_NFSNODE_H_
   42 
   43 #if !defined(_NFSCLIENT_NFS_H_) && !defined(_KERNEL)
   44 #include <nfs/nfs.h>
   45 #endif
   46 
   47 /*
   48  * Silly rename structure that hangs off the nfsnode until the name
   49  * can be removed by nfs_inactive()
   50  */
   51 struct sillyrename {
   52         struct  ucred *s_cred;
   53         struct  vnode *s_dvp;
   54         long    s_namlen;
   55         char    s_name[20];
   56 };
   57 
   58 /*
   59  * This structure is used to save the logical directory offset to
   60  * NFS cookie mappings.
   61  * The mappings are stored in a list headed
   62  * by n_cookies, as required.
   63  * There is one mapping for each NFS_DIRBLKSIZ bytes of directory information
   64  * stored in increasing logical offset byte order.
   65  */
   66 #define NFSNUMCOOKIES           31
   67 
   68 struct nfsdmap {
   69         LIST_ENTRY(nfsdmap)     ndm_list;
   70         int                     ndm_eocookie;
   71         nfsuint64               ndm_cookies[NFSNUMCOOKIES];
   72 };
   73 
   74 /*
   75  * The nfsnode is the nfs equivalent to ufs's inode. Any similarity
   76  * is purely coincidental.
   77  * There is a unique nfsnode allocated for each active file,
   78  * each current directory, each mounted-on file, text file, and the root.
   79  * An nfsnode is 'named' by its file handle. (nget/nfs_node.c)
   80  * If this structure exceeds 256 bytes (it is currently 256 using 4.4BSD-Lite
   81  * type definitions), file handles of > 32 bytes should probably be split out
   82  * into a separate MALLOC()'d data structure. (Reduce the size of nfsfh_t by
   83  * changing the definition in nfsproto.h of NFS_SMALLFH.)
   84  * NB: Hopefully the current order of the fields is such that everything will
   85  *     be well aligned and, therefore, tightly packed.
   86  */
   87 struct nfsnode {
   88         LIST_ENTRY(nfsnode)     n_hash;         /* Hash chain */
   89         u_quad_t                n_size;         /* Current size of file */
   90         u_quad_t                n_brev;         /* Modify rev when cached */
   91         u_quad_t                n_lrev;         /* Modify rev for lease */
   92         struct vattr            n_vattr;        /* Vnode attribute cache */
   93         time_t                  n_attrstamp;    /* Attr. cache timestamp */
   94         u_int32_t               n_mode;         /* ACCESS mode cache */
   95         uid_t                   n_modeuid;      /* credentials having mode */
   96         time_t                  n_modestamp;    /* mode cache timestamp */
   97         time_t                  n_mtime;        /* Prev modify time. */
   98         time_t                  n_ctime;        /* Prev create time. */
   99         time_t                  n_expiry;       /* Lease expiry time */
  100         nfsfh_t                 *n_fhp;         /* NFS File Handle */
  101         struct vnode            *n_vnode;       /* associated vnode */
  102         struct lockf            *n_lockf;       /* Locking record of file */
  103         int                     n_error;        /* Save write error value */
  104         union {
  105                 struct timespec nf_atim;        /* Special file times */
  106                 nfsuint64       nd_cookieverf;  /* Cookie verifier (dir only) */
  107         } n_un1;
  108         union {
  109                 struct timespec nf_mtim;
  110                 off_t           nd_direof;      /* Dir. EOF offset cache */
  111         } n_un2;
  112         union {
  113                 struct sillyrename *nf_silly;   /* Ptr to silly rename struct */
  114                 LIST_HEAD(, nfsdmap) nd_cook;   /* cookies */
  115         } n_un3;
  116         short                   n_fhsize;       /* size in bytes, of fh */
  117         short                   n_flag;         /* Flag for locking.. */
  118         nfsfh_t                 n_fh;           /* Small File Handle */
  119         struct lock             n_rslock;
  120 };
  121 
  122 #define n_atim          n_un1.nf_atim
  123 #define n_mtim          n_un2.nf_mtim
  124 #define n_sillyrename   n_un3.nf_silly
  125 #define n_cookieverf    n_un1.nd_cookieverf
  126 #define n_direofoffset  n_un2.nd_direof
  127 #define n_cookies       n_un3.nd_cook
  128 
  129 /*
  130  * Flags for n_flag
  131  */
  132 #define NFLUSHWANT      0x0001  /* Want wakeup from a flush in prog. */
  133 #define NFLUSHINPROG    0x0002  /* Avoid multiple calls to vinvalbuf() */
  134 #define NMODIFIED       0x0004  /* Might have a modified buffer in bio */
  135 #define NWRITEERR       0x0008  /* Flag write errors so close will know */
  136 /* 0x20, 0x40, 0x80 free */
  137 #define NACC            0x0100  /* Special file accessed */
  138 #define NUPD            0x0200  /* Special file updated */
  139 #define NCHG            0x0400  /* Special file times changed */
  140 
  141 /*
  142  * Convert between nfsnode pointers and vnode pointers
  143  */
  144 #define VTONFS(vp)      ((struct nfsnode *)(vp)->v_data)
  145 #define NFSTOV(np)      ((struct vnode *)(np)->n_vnode)
  146 
  147 /*
  148  * Queue head for nfsiod's
  149  */
  150 extern TAILQ_HEAD(nfs_bufq, buf) nfs_bufq;
  151 extern struct proc *nfs_iodwant[NFS_MAXASYNCDAEMON];
  152 extern struct nfsmount *nfs_iodmount[NFS_MAXASYNCDAEMON];
  153 
  154 #if defined(_KERNEL)
  155 
  156 /*
  157  *      nfs_rslock -    Attempt to obtain lock on nfsnode
  158  *
  159  *      Attempt to obtain a lock on the passed nfsnode, returning ENOLCK
  160  *      if the lock could not be obtained due to our having to sleep.  This
  161  *      function is generally used to lock around code that modifies an
  162  *      NFS file's size.  In order to avoid deadlocks the lock
  163  *      should not be obtained while other locks are being held.
  164  */
  165 
  166 static __inline int
  167 nfs_rslock(struct nfsnode *np, struct thread *td)
  168 {
  169 
  170         return(lockmgr(&np->n_rslock,
  171             LK_EXCLUSIVE | LK_CANRECURSE | LK_SLEEPFAIL, NULL, td));
  172 }
  173 
  174 static __inline void
  175 nfs_rsunlock(struct nfsnode *np, struct thread *td)
  176 {
  177 
  178         (void)lockmgr(&np->n_rslock, LK_RELEASE, NULL, td);
  179 }
  180 
  181 extern  vop_t   **fifo_nfsv2nodeop_p;
  182 extern  vop_t   **nfsv2_vnodeop_p;
  183 extern  vop_t   **spec_nfsv2nodeop_p;
  184 
  185 /*
  186  * Prototypes for NFS vnode operations
  187  */
  188 int     nfs_getpages(struct vop_getpages_args *);
  189 int     nfs_putpages(struct vop_putpages_args *);
  190 int     nfs_write(struct vop_write_args *);
  191 int     nfs_inactive(struct vop_inactive_args *);
  192 int     nfs_reclaim(struct vop_reclaim_args *);
  193 
  194 /* other stuff */
  195 int     nfs_removeit(struct sillyrename *);
  196 int     nfs_nget(struct mount *, nfsfh_t *, int, struct nfsnode **);
  197 nfsuint64 *nfs_getcookie(struct nfsnode *, off_t, int);
  198 void    nfs_invaldir(struct vnode *);
  199 
  200 #endif /* _KERNEL */
  201 
  202 #endif

Cache object: 2a2ceacd9ecb2cf6140a2e3b6e684014


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]


This page is part of the FreeBSD/Linux Linux Kernel Cross-Reference, and was automatically generated using a modified version of the LXR engine.