FreeBSD/Linux Kernel Cross Reference
sys/fs/nfsclient/nfs.h

     /*-
      * SPDX-License-Identifier: BSD-3-Clause
      *
      * 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. 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.
     *
     * $FreeBSD$
     */
    
    #ifndef _NFSCLIENT_NFS_H_
    #define _NFSCLIENT_NFS_H_
    
    #if defined(_KERNEL)
    
    #ifndef NFS_TPRINTF_INITIAL_DELAY
    #define NFS_TPRINTF_INITIAL_DELAY       12
    #endif
    
    #ifndef NFS_TPRINTF_DELAY
    #define NFS_TPRINTF_DELAY               30
    #endif
    
    /*
     * Nfs version macros.
     */
    #define NFS_ISV3(v) \
            (VFSTONFS((v)->v_mount)->nm_flag & NFSMNT_NFSV3)
    #define NFS_ISV4(v) \
            (VFSTONFS((v)->v_mount)->nm_flag & NFSMNT_NFSV4)
    #define NFS_ISV34(v) \
            (VFSTONFS((v)->v_mount)->nm_flag & (NFSMNT_NFSV3 | NFSMNT_NFSV4))
    
    #ifdef NFS_DEBUG
    
    extern int nfs_debug;
    #define NFS_DEBUG_ASYNCIO       1 /* asynchronous i/o */
    #define NFS_DEBUG_WG            2 /* server write gathering */
    #define NFS_DEBUG_RC            4 /* server request caching */
    
    #define NFS_DPF(cat, args)                                      \
            do {                                                    \
                    if (nfs_debug & NFS_DEBUG_##cat) printf args;   \
            } while (0)
    
    #else
    
    #define NFS_DPF(cat, args)
    
    #endif
    
    /*
     * NFS iod threads can be in one of these three states once spawned.
     * NFSIOD_NOT_AVAILABLE - Cannot be assigned an I/O operation at this time.
     * NFSIOD_AVAILABLE - Available to be assigned an I/O operation.
     * NFSIOD_CREATED_FOR_NFS_ASYNCIO - Newly created for nfs_asyncio() and
     *      will be used by the thread that called nfs_asyncio().
     */
    enum nfsiod_state {
            NFSIOD_NOT_AVAILABLE = 0,
            NFSIOD_AVAILABLE = 1,
            NFSIOD_CREATED_FOR_NFS_ASYNCIO = 2,
    };
    
    /*
     * Function prototypes.
     */
    int ncl_meta_setsize(struct vnode *, struct thread *, u_quad_t);
    void ncl_doio_directwrite(struct buf *);
    int ncl_bioread(struct vnode *, struct uio *, int, struct ucred *);
    int ncl_biowrite(struct vnode *, struct uio *, int, struct ucred *);
    int ncl_vinvalbuf(struct vnode *, int, struct thread *, int);
    int ncl_asyncio(struct nfsmount *, struct buf *, struct ucred *,
       struct thread *);
   int ncl_doio(struct vnode *, struct buf *, struct ucred *, struct thread *,
       int);
   void ncl_nhinit(void);
   void ncl_nhuninit(void);
   void ncl_nodelock(struct nfsnode *);
   void ncl_nodeunlock(struct nfsnode *);
   int ncl_getattrcache(struct vnode *, struct vattr *);
   int ncl_readrpc(struct vnode *, struct uio *, struct ucred *);
   int ncl_writerpc(struct vnode *, struct uio *, struct ucred *, int *, int *,
       int, int);
   int ncl_readlinkrpc(struct vnode *, struct uio *, struct ucred *);
   int ncl_readdirrpc(struct vnode *, struct uio *, struct ucred *,
       struct thread *);
   int ncl_readdirplusrpc(struct vnode *, struct uio *, struct ucred *,
       struct thread *);
   int ncl_writebp(struct buf *, int, struct thread *);
   int ncl_commit(struct vnode *, u_quad_t, int, struct ucred *, struct thread *);
   void ncl_clearcommit(struct mount *);
   int ncl_fsinfo(struct nfsmount *, struct vnode *, struct ucred *,
       struct thread *);
   int ncl_init(struct vfsconf *);
   int ncl_uninit(struct vfsconf *);
   void    ncl_nfsiodnew(void);
   void    ncl_nfsiodnew_tq(__unused void *, int);
   
   #endif  /* _KERNEL */
   
   #endif  /* _NFSCLIENT_NFS_H_ */

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