FreeBSD/Linux Kernel Cross Reference
sys/sys/mount.h

     /*      $OpenBSD: mount.h,v 1.148 2021/04/06 14:17:35 kn Exp $  */
     /*      $NetBSD: mount.h,v 1.48 1996/02/18 11:55:47 fvdl Exp $  */
     
     /*
      * Copyright (c) 1989, 1991, 1993
      *      The Regents of the University of California.  All rights reserved.
      *
      * 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.
     *
     *      @(#)mount.h     8.15 (Berkeley) 7/14/94
     */
    
    #ifndef _SYS_MOUNT_H_
    #define _SYS_MOUNT_H_
    
    #include <sys/cdefs.h>
    #ifndef _KERNEL
    #include <sys/ucred.h>
    #endif
    #include <sys/queue.h>
    #include <sys/rwlock.h>
    
    typedef struct { int32_t val[2]; } fsid_t;      /* file system id type */
    
    /*
     * File identifier.
     * These are unique per filesystem on a single machine.
     */
    #define MAXFIDSZ        16
    
    struct fid {
            u_short         fid_len;                /* length of data in bytes */
            u_short         fid_reserved;           /* force longword alignment */
            char            fid_data[MAXFIDSZ];     /* data (variable length) */
    };
    
    /*
     * Export arguments for local filesystem mount calls.
     */
    struct export_args {
            int     ex_flags;               /* export related flags */
            uid_t   ex_root;                /* mapping for root uid */
            struct  xucred ex_anon;         /* mapping for anonymous user */
            struct  sockaddr *ex_addr;      /* net address to which exported */
            int     ex_addrlen;             /* and the net address length */
            struct  sockaddr *ex_mask;      /* mask of valid bits in saddr */
            int     ex_masklen;             /* and the smask length */
    };
    
    /*
     * Arguments to mount UFS-based filesystems
     */
    struct ufs_args {
            char    *fspec;                 /* block special device to mount */
            struct  export_args export_info;/* network export information */
    };
    
    /*
     * Arguments to mount MFS
     */
    struct mfs_args {
            char    *fspec;                 /* name to export for statfs */
            struct  export_args export_info;/* if exported MFSes are supported */
            caddr_t base;                   /* base of file system in memory */
            u_long  size;                   /* size of file system */
    };
    
    /*
     * Arguments to mount ISO 9660 filesystems.
     */
    struct iso_args {
            char    *fspec;                 /* block special device to mount */
            struct  export_args export_info;/* network export info */
            int     flags;                  /* mounting flags, see below */
            int     sess;                   /* start sector of session */
    };
    
   #define ISOFSMNT_NORRIP         0x00000001      /* disable Rock Ridge Ext.*/
   #define ISOFSMNT_GENS           0x00000002      /* enable generation numbers */
   #define ISOFSMNT_EXTATT         0x00000004      /* enable extended attr. */
   #define ISOFSMNT_NOJOLIET       0x00000008      /* disable Joliet Ext.*/
   #define ISOFSMNT_SESS           0x00000010      /* use iso_args.sess */
   
   /*
    * Arguments to mount NFS
    */
   #define NFS_ARGSVERSION 4               /* change when nfs_args changes */
   struct nfs_args {
           int             version;        /* args structure version number */
           struct sockaddr *addr;          /* file server address */
           int             addrlen;        /* length of address */
           int             sotype;         /* Socket type */
           int             proto;          /* and Protocol */
           u_char          *fh;            /* File handle to be mounted */
           int             fhsize;         /* Size, in bytes, of fh */
           int             flags;          /* flags */
           int             wsize;          /* write size in bytes */
           int             rsize;          /* read size in bytes */
           int             readdirsize;    /* readdir size in bytes */
           int             timeo;          /* initial timeout in .1 secs */
           int             retrans;        /* times to retry send */
           int             maxgrouplist;   /* Max. size of group list */
           int             readahead;      /* # of blocks to readahead */
           int             leaseterm;      /* Term (sec) of lease */
           int             deadthresh;     /* Retrans threshold */
           char            *hostname;      /* server's name */
           int             acregmin;       /* Attr cache file recently modified */
           int             acregmax;       /* ac file not recently modified */
           int             acdirmin;       /* ac for dir recently modified */
           int             acdirmax;       /* ac for dir not recently modified */
   };
   
   /*
    * NFS mount option flags
    */
   #define NFSMNT_RESVPORT         0x00000000  /* always use reserved ports */
   #define NFSMNT_SOFT             0x00000001  /* soft mount (hard is default) */
   #define NFSMNT_WSIZE            0x00000002  /* set write size */
   #define NFSMNT_RSIZE            0x00000004  /* set read size */
   #define NFSMNT_TIMEO            0x00000008  /* set initial timeout */
   #define NFSMNT_RETRANS          0x00000010  /* set number of request retries */
   #define NFSMNT_MAXGRPS          0x00000020  /* set maximum grouplist size */
   #define NFSMNT_INT              0x00000040  /* allow interrupts on hard mount */
   #define NFSMNT_NOCONN           0x00000080  /* Don't Connect the socket */
   #define NFSMNT_NQNFS            0x00000100  /* Use Nqnfs protocol */
   #define NFSMNT_NFSV3            0x00000200  /* Use NFS Version 3 protocol */
   #define NFSMNT_KERB             0x00000400  /* Use Kerberos authentication */
   #define NFSMNT_DUMBTIMR         0x00000800  /* Don't estimate rtt dynamically */
   #define NFSMNT_LEASETERM        0x00001000  /* set lease term (nqnfs) */
   #define NFSMNT_READAHEAD        0x00002000  /* set read ahead */
   #define NFSMNT_DEADTHRESH       0x00004000  /* set dead server retry thresh */
   #define NFSMNT_NOAC             0x00008000  /* disable attribute cache */
   #define NFSMNT_RDIRPLUS         0x00010000  /* Use Readdirplus for V3 */
   #define NFSMNT_READDIRSIZE      0x00020000  /* Set readdir size */
   
   /* Flags valid only in mount syscall arguments */
   #define NFSMNT_ACREGMIN         0x00040000  /* acregmin field valid */
   #define NFSMNT_ACREGMAX         0x00080000  /* acregmax field valid */
   #define NFSMNT_ACDIRMIN         0x00100000  /* acdirmin field valid */
   #define NFSMNT_ACDIRMAX         0x00200000  /* acdirmax field valid */
   
   /* Flags valid only in kernel */
   #define NFSMNT_INTERNAL         0xfffc0000  /* Bits set internally */
   #define NFSMNT_HASWRITEVERF     0x00040000  /* Has write verifier for V3 */
   #define NFSMNT_GOTPATHCONF      0x00080000  /* Got the V3 pathconf info */
   #define NFSMNT_GOTFSINFO        0x00100000  /* Got the V3 fsinfo */
   #define NFSMNT_MNTD             0x00200000  /* Mnt server for mnt point */
   #define NFSMNT_DISMINPROG       0x00400000  /* Dismount in progress */
   #define NFSMNT_DISMNT           0x00800000  /* Dismounted */
   #define NFSMNT_SNDLOCK          0x01000000  /* Send socket lock */
   #define NFSMNT_WANTSND          0x02000000  /* Want above */
   #define NFSMNT_RCVLOCK          0x04000000  /* Rcv socket lock */
   #define NFSMNT_WANTRCV          0x08000000  /* Want above */
   #define NFSMNT_WAITAUTH         0x10000000  /* Wait for authentication */
   #define NFSMNT_HASAUTH          0x20000000  /* Has authenticator */
   #define NFSMNT_WANTAUTH         0x40000000  /* Wants an authenticator */
   #define NFSMNT_AUTHERR          0x80000000  /* Authentication error */
   
   /*
    *  Arguments to mount MSDOS filesystems.
    */
   struct msdosfs_args {
           char    *fspec;         /* blocks special holding the fs to mount */
           struct  export_args export_info;
                                   /* network export information */
           uid_t   uid;            /* uid that owns msdosfs files */
           gid_t   gid;            /* gid that owns msdosfs files */
           mode_t  mask;           /* mask to be applied for msdosfs perms */
           int     flags;          /* see below */
   };
   
   /*
    * Msdosfs mount options:
    */
   #define MSDOSFSMNT_SHORTNAME    0x01    /* Force old DOS short names only */
   #define MSDOSFSMNT_LONGNAME     0x02    /* Force Win'95 long names */
   #define MSDOSFSMNT_NOWIN95      0x04    /* Completely ignore Win95 entries */
   
   /*
    * Arguments to mount ntfs filesystems
    */
   struct ntfs_args {
           char    *fspec;                 /* block special device to mount */
           struct  export_args export_info;/* network export information */
           uid_t   uid;                    /* uid that owns ntfs files */
           gid_t   gid;                    /* gid that owns ntfs files */
           mode_t  mode;                   /* mask to be applied for ntfs perms */
           u_long  flag;                   /* additional flags */
   };
   
   /*
    * ntfs mount options:
    */
   #define NTFS_MFLAG_CASEINS      0x00000001
   #define NTFS_MFLAG_ALLNAMES     0x00000002
   
   /* Arguments to mount UDF file systems */
   struct udf_args {
           char *fspec; /* Block special device to mount */
           u_int32_t lastblock; /* Special device last block */
   };
   
   /*
    * Arguments to mount tmpfs file systems
    */
   #define TMPFS_ARGS_VERSION      1
   struct tmpfs_args {
           int                     ta_version;
   
           /* Size counters. */
           ino_t                   ta_nodes_max;
           off_t                   ta_size_max;
   
           /* Root node attributes. */
           uid_t                   ta_root_uid;
           gid_t                   ta_root_gid;
           mode_t                  ta_root_mode;
   };
   
   /*
    * Arguments to mount fusefs filesystems
    */
   struct fusefs_args {
           char *name;
           int fd;
           int max_read;
   
           /*
            * FUSE does not allow the file system to be accessed by other users
            * unless this option is specified. This is to prevent unintentional
            * denial of service to other users if the file system is not
            * responding. e.g. user executes df(1) or cron job that scans mounted
            * file systems.
            */
           int allow_other;
   };
   
   /*
    * file system statistics
    */
   
   #define MFSNAMELEN      16      /* length of fs type name, including nul */
   #define MNAMELEN        90      /* length of buffer for returned name */
   
   /* per-filesystem mount options */
   union mount_info {
           struct ufs_args ufs_args;
           struct mfs_args mfs_args;
           struct nfs_args nfs_args;
           struct iso_args iso_args;
           struct msdosfs_args msdosfs_args;
           struct ntfs_args ntfs_args;
           struct tmpfs_args tmpfs_args;
           char __align[160];      /* 64-bit alignment and room to grow */
   };
   
   /* new statfs structure with mount options and statvfs fields */
   struct statfs {
           u_int32_t       f_flags;        /* copy of mount flags */
           u_int32_t       f_bsize;        /* file system block size */
           u_int32_t       f_iosize;       /* optimal transfer block size */
   
                                           /* unit is f_bsize */
           u_int64_t       f_blocks;       /* total data blocks in file system */
           u_int64_t       f_bfree;        /* free blocks in fs */
           int64_t         f_bavail;       /* free blocks avail to non-superuser */
   
           u_int64_t       f_files;        /* total file nodes in file system */
           u_int64_t       f_ffree;        /* free file nodes in fs */
           int64_t         f_favail;       /* free file nodes avail to non-root */
   
           u_int64_t       f_syncwrites;   /* count of sync writes since mount */
           u_int64_t       f_syncreads;    /* count of sync reads since mount */
           u_int64_t       f_asyncwrites;  /* count of async writes since mount */
           u_int64_t       f_asyncreads;   /* count of async reads since mount */
   
           fsid_t          f_fsid;         /* file system id */
           u_int32_t       f_namemax;      /* maximum filename length */
           uid_t           f_owner;        /* user that mounted the file system */
           u_int64_t       f_ctime;        /* last mount [-u] time */
   
           char f_fstypename[MFSNAMELEN];  /* fs type name */
           char f_mntonname[MNAMELEN];     /* directory on which mounted */
           char f_mntfromname[MNAMELEN];   /* mounted file system */
           char f_mntfromspec[MNAMELEN];   /* special for mount request */
           union mount_info mount_info;    /* per-filesystem mount options */
   };
   
   
   /*
    * File system types.
    */
   #define MOUNT_FFS       "ffs"           /* UNIX "Fast" Filesystem */
   #define MOUNT_UFS       MOUNT_FFS       /* for compatibility */
   #define MOUNT_NFS       "nfs"           /* Network Filesystem */
   #define MOUNT_MFS       "mfs"           /* Memory Filesystem */
   #define MOUNT_MSDOS     "msdos"         /* MSDOS Filesystem */
   #define MOUNT_AFS       "afs"           /* Andrew Filesystem */
   #define MOUNT_CD9660    "cd9660"        /* ISO9660 (aka CDROM) Filesystem */
   #define MOUNT_EXT2FS    "ext2fs"        /* Second Extended Filesystem */
   #define MOUNT_NCPFS     "ncpfs"         /* NetWare Network File System */
   #define MOUNT_NTFS      "ntfs"          /* NTFS */
   #define MOUNT_UDF       "udf"           /* UDF */
   #define MOUNT_TMPFS     "tmpfs"         /* tmpfs */
   #define MOUNT_FUSEFS    "fuse"          /* FUSE */
   
   /*
    * Structure per mounted file system.  Each mounted file system has an
    * array of operations and an instance record.  The file systems are
    * put on a doubly linked list.
    */
   struct mount {
           TAILQ_ENTRY(mount) mnt_list;            /* mount list */
           SLIST_ENTRY(mount) mnt_dounmount;       /* unmount work queue */
           const struct vfsops *mnt_op;            /* operations on fs */
           struct vfsconf  *mnt_vfc;               /* configuration info */
           struct vnode    *mnt_vnodecovered;      /* vnode we mounted on */
           struct vnode    *mnt_syncer;            /* syncer vnode */
           TAILQ_HEAD(, vnode) mnt_vnodelist;      /* list of vnodes this mount */
           struct rwlock   mnt_lock;               /* mount structure lock */
           int             mnt_flag;               /* flags */
           struct statfs   mnt_stat;               /* cache of filesystem stats */
           void            *mnt_data;              /* private data */
   };
   
   /*
    * Mount flags.
    *
    * Unmount uses MNT_FORCE flag.
    */
   #define MNT_RDONLY      0x00000001      /* read only filesystem */
   #define MNT_SYNCHRONOUS 0x00000002      /* file system written synchronously */
   #define MNT_NOEXEC      0x00000004      /* can't exec from filesystem */
   #define MNT_NOSUID      0x00000008      /* don't honor setuid bits on fs */
   #define MNT_NODEV       0x00000010      /* don't interpret special files */
   #define MNT_NOPERM      0x00000020      /* don't enforce permission checks */
   #define MNT_ASYNC       0x00000040      /* file system written asynchronously */
   #define MNT_WXALLOWED   0x00000800      /* filesystem allows W|X mappings */
   
   /*
    * exported mount flags.
    */
   #define MNT_EXRDONLY    0x00000080      /* exported read only */
   #define MNT_EXPORTED    0x00000100      /* file system is exported */
   #define MNT_DEFEXPORTED 0x00000200      /* exported to the world */
   #define MNT_EXPORTANON  0x00000400      /* use anon uid mapping for everyone */
   
   /*
    * Flags set by internal operations.
    */
   #define MNT_LOCAL       0x00001000      /* filesystem is stored locally */
   #define MNT_QUOTA       0x00002000      /* quotas are enabled on filesystem */
   #define MNT_ROOTFS      0x00004000      /* identifies the root filesystem */
   
   /*
    * Extra post 4.4BSD-lite2 mount flags.
    */
   #define MNT_NOATIME     0x00008000      /* don't update access times on fs */
   
   /*
    * Mask of flags that are visible to statfs()
    */
   #define MNT_VISFLAGMASK 0x0400ffff
   
   #define MNT_BITS \
       "\2\001RDONLY\002SYNCHRONOUS\003NOEXEC\004NOSUID\005NODEV\006NOPERM" \
       "\007ASYNC\010EXRDONLY\011EXPORTED\012DEFEXPORTED\013EXPORTANON" \
       "\014WXALLOWED\015LOCAL\016QUOTA\017ROOTFS\020NOATIME\021UPDATE" \
       "\022DELEXPORT\023RELOAD\024FORCE\025STALLED\026SWAPPABLE\032WANTRDWR" \
       "\033SOFTDEP\034DOOMED"
   
   /*
    * filesystem control flags.
    */
   #define MNT_UPDATE      0x00010000      /* not a real mount, just an update */
   #define MNT_DELEXPORT   0x00020000      /* delete export host lists */
   #define MNT_RELOAD      0x00040000      /* reload filesystem data */
   #define MNT_FORCE       0x00080000      /* force unmount or readonly change */
   #define MNT_STALLED     0x00100000      /* filesystem stalled */ 
   #define MNT_SWAPPABLE   0x00200000      /* filesystem can be used for swap */
   #define MNT_WANTRDWR    0x02000000      /* want upgrade to read/write */
   #define MNT_SOFTDEP     0x04000000      /* soft dependencies being done */
   #define MNT_DOOMED      0x08000000      /* device behind filesystem is gone */
   
   #ifdef _KERNEL
   #define MNT_OP_FLAGS    (MNT_UPDATE | MNT_RELOAD | MNT_FORCE | MNT_WANTRDWR)
   #endif
   
   /*
    * Flags for various system call interfaces.
    *
    * waitfor flags to vfs_sync() and getfsstat()
    */
   #define MNT_WAIT        1       /* synchronously wait for I/O to complete */
   #define MNT_NOWAIT      2       /* start all I/O, but do not wait for it */
   #define MNT_LAZY        3       /* push data not written by filesystem syncer */
   
   /*
    * Generic file handle
    */
   struct fhandle {
           fsid_t  fh_fsid;        /* File system id of mount point */
           struct  fid fh_fid;     /* File sys specific id */
   };
   typedef struct fhandle  fhandle_t;
   
   /*
    * Sysctl CTL_VFS definitions.
    *
    * Second level identifier specifies which filesystem. Second level
    * identifier VFS_GENERIC returns information about all filesystems.
    */
   #define VFS_GENERIC     0       /* generic filesystem information */
   /*
    * Third level identifiers for VFS_GENERIC are given below; third
    * level identifiers for specific filesystems are given in their
    * mount specific header files.
    */
   #define VFS_MAXTYPENUM  1       /* int: highest defined filesystem type */
   #define VFS_CONF        2       /* struct: vfsconf for filesystem given
                                      as next argument */
   #define VFS_BCACHESTAT  3       /* struct: buffer cache statistics given 
                                      as next argument */
   #define CTL_VFSGENCTL_NAMES { \
           { 0, 0 }, \
           { "maxtypenum", CTLTYPE_INT }, \
           { "conf", CTLTYPE_NODE }, \
           { "bcachestat", CTLTYPE_STRUCT } \
   }
   
   /*
    * Filesystem configuration information. One of these exists for each
    * type of filesystem supported by the kernel. These are searched at
    * mount time to identify the requested filesystem.
    */
   struct vfsconf {
           const struct vfsops *vfc_vfsops; /* filesystem operations vector */
           char    vfc_name[MFSNAMELEN];   /* filesystem type name */
           int     vfc_typenum;            /* historic filesystem type number */
           u_int   vfc_refcount;           /* number mounted of this type */
           int     vfc_flags;              /* permanent flags */
           size_t  vfc_datasize;           /* size of data args */
   };
   
   /* buffer cache statistics */
   struct bcachestats {
           int64_t numbufs;                /* number of buffers allocated */
           int64_t numbufpages;            /* number of pages in buffer cache */
           int64_t numdirtypages;          /* number of dirty free pages */
           int64_t numcleanpages;          /* number of clean free pages */
           int64_t pendingwrites;          /* number of pending writes */
           int64_t pendingreads;           /* number of pending reads */
           int64_t numwrites;              /* total writes started */
           int64_t numreads;               /* total reads started */
           int64_t cachehits;              /* total reads found in cache */
           int64_t busymapped;             /* number of busy and mapped buffers */
           int64_t dmapages;               /* dma reachable pages in buffer cache */
           int64_t highpages;              /* pages above dma region */
           int64_t delwribufs;             /* delayed write buffers */
           int64_t kvaslots;               /* kva slots total */
           int64_t kvaslots_avail;         /* available kva slots */
           int64_t highflips;              /* total flips to above DMA */
           int64_t highflops;              /* total failed flips to above DMA */
           int64_t dmaflips;               /* total flips from high to DMA */
   };
   #ifdef _KERNEL
   extern struct bcachestats bcstats;
   extern long buflowpages, bufhighpages, bufbackpages;
   #define BUFPAGES_DEFICIT (((buflowpages - bcstats.numbufpages) < 0) ? 0 \
       : buflowpages - bcstats.numbufpages)
   #define BUFPAGES_INACT (((bcstats.numcleanpages - buflowpages) < 0) ? 0 \
       : bcstats.numcleanpages - buflowpages)
   extern int bufcachepercent;
   extern void bufadjust(int);
   struct uvm_constraint_range;
   extern int bufbackoff(struct uvm_constraint_range*, long);
   
   /*
    * Operations supported on mounted file system.
    */
   struct nameidata;
   struct mbuf;
   
   extern int maxvfsconf;          /* highest defined filesystem type */
   
   struct vfsops {
           int     (*vfs_mount)(struct mount *mp, const char *path,
                                       void *data,
                                       struct nameidata *ndp, struct proc *p);
           int     (*vfs_start)(struct mount *mp, int flags,
                                       struct proc *p);
           int     (*vfs_unmount)(struct mount *mp, int mntflags,
                                       struct proc *p);
           int     (*vfs_root)(struct mount *mp, struct vnode **vpp);
           int     (*vfs_quotactl)(struct mount *mp, int cmds, uid_t uid,
                                       caddr_t arg, struct proc *p);
           int     (*vfs_statfs)(struct mount *mp, struct statfs *sbp,
                                       struct proc *p);
           int     (*vfs_sync)(struct mount *mp, int waitfor, int stall,
                                       struct ucred *cred, struct proc *p);
           int     (*vfs_vget)(struct mount *mp, ino_t ino,
                                       struct vnode **vpp);
           int     (*vfs_fhtovp)(struct mount *mp, struct fid *fhp,
                                        struct vnode **vpp);
           int     (*vfs_vptofh)(struct vnode *vp, struct fid *fhp);
           int     (*vfs_init)(struct vfsconf *);
           int     (*vfs_sysctl)(int *, u_int, void *, size_t *, void *,
                                        size_t, struct proc *);
           int     (*vfs_checkexp)(struct mount *mp, struct mbuf *nam,
                                       int *extflagsp, struct ucred **credanonp);
   };
   
   #define VFS_MOUNT(MP, PATH, DATA, NDP, P) \
           (*(MP)->mnt_op->vfs_mount)(MP, PATH, DATA, NDP, P)
   #define VFS_START(MP, FLAGS, P)   (*(MP)->mnt_op->vfs_start)(MP, FLAGS, P)
   #define VFS_UNMOUNT(MP, FORCE, P) (*(MP)->mnt_op->vfs_unmount)(MP, FORCE, P)
   #define VFS_ROOT(MP, VPP)         (*(MP)->mnt_op->vfs_root)(MP, VPP)
   #define VFS_QUOTACTL(MP,C,U,A,P)  (*(MP)->mnt_op->vfs_quotactl)(MP, C, U, A, P)
   #define VFS_STATFS(MP, SBP, P)    (*(MP)->mnt_op->vfs_statfs)(MP, SBP, P)
   #define VFS_SYNC(MP, W, S, C, P)  (*(MP)->mnt_op->vfs_sync)(MP, W, S, C, P)
   #define VFS_VGET(MP, INO, VPP)    (*(MP)->mnt_op->vfs_vget)(MP, INO, VPP)
   #define VFS_FHTOVP(MP, FIDP, VPP) \
           (*(MP)->mnt_op->vfs_fhtovp)(MP, FIDP, VPP)
   #define VFS_VPTOFH(VP, FIDP)      (*(VP)->v_mount->mnt_op->vfs_vptofh)(VP, FIDP)
   #define VFS_CHECKEXP(MP, NAM, EXFLG, CRED) \
           (*(MP)->mnt_op->vfs_checkexp)(MP, NAM, EXFLG, CRED)
   
   /* Set up the filesystem operations for vnodes. */
   extern  const struct vfsops ffs_vfsops;
   extern  const struct vfsops mfs_vfsops;
   extern  const struct vfsops msdosfs_vfsops;
   extern  const struct vfsops nfs_vfsops;
   extern  const struct vfsops cd9660_vfsops;
   extern  const struct vfsops ext2fs_vfsops;
   extern  const struct vfsops ntfs_vfsops;
   extern  const struct vfsops udf_vfsops;
   extern  const struct vfsops fusefs_vfsops;
   extern  const struct vfsops tmpfs_vfsops;
   
   #include <net/radix.h>
   #include <sys/socket.h>         /* XXX for AF_MAX */
   
   /*
    * Network address lookup element
    */
   struct netcred {
           struct  radix_node netc_rnodes[2];
           int     netc_exflags;
           int     netc_len;                       /* size of the allocation */
           struct  ucred netc_anon;
   };
   
   /*
    * Network export information
    */
   struct netexport {
           struct  netcred ne_defexported;         /* Default export */
           struct  radix_node_head *ne_rtable_inet;/* Individual exports */
   };
   
   /*
    * exported vnode operations
    */
   int     vfs_busy(struct mount *, int);
   #define VB_READ         0x01
   #define VB_WRITE        0x02
   #define VB_NOWAIT       0x04    /* immediately fail on busy lock */
   #define VB_WAIT         0x08    /* sleep fail on busy lock */
   #define VB_DUPOK        0x10    /* permit duplicate mount busying */
   
   int     vfs_isbusy(struct mount *);
   struct  mount *vfs_mount_alloc(struct vnode *, struct vfsconf *);
   void    vfs_mount_free(struct mount *);
   int     vfs_mount_foreach_vnode(struct mount *, int (*func)(struct vnode *,
                                       void *), void *);
   void    vfs_getnewfsid(struct mount *);
   struct  mount *vfs_getvfs(fsid_t *);
   int     vfs_mountedon(struct vnode *);
   int     vfs_rootmountalloc(char *, char *, struct mount **);
   void    vfs_unbusy(struct mount *);
   extern  TAILQ_HEAD(mntlist, mount) mountlist;
   int     vfs_stall(struct proc *, int);
   void    vfs_stall_barrier(void);
   
   struct  mount *getvfs(fsid_t *);            /* return vfs given fsid */
                                               /* process mount export info */
   int     vfs_export(struct mount *, struct netexport *, struct export_args *);
                                               /* lookup host in fs export list */
   struct  netcred *vfs_export_lookup(struct mount *, struct netexport *,
               struct mbuf *);
   int     vfs_allocate_syncvnode(struct mount *);
   int     speedup_syncer(void);
   
   int     vfs_syncwait(struct proc *, int);   /* sync and wait for complete */
   void    vfs_shutdown(struct proc *);        /* unmount and sync file systems */
   int     dounmount(struct mount *, int, struct proc *);
   void    vfsinit(void);
   struct  vfsconf *vfs_byname(const char *);
   struct  vfsconf *vfs_bytypenum(int);
   #else /* _KERNEL */
   __BEGIN_DECLS
   int     fstatfs(int, struct statfs *);
   int     getfh(const char *, fhandle_t *);
   int     getfsstat(struct statfs *, size_t, int);
   int     getmntinfo(struct statfs **, int);
   int     mount(const char *, const char *, int, void *);
   int     statfs(const char *, struct statfs *);
   int     unmount(const char *, int);
   #if __BSD_VISIBLE
   struct stat;
   int     fhopen(const fhandle_t *, int);
   int     fhstat(const fhandle_t *, struct stat *);
   int     fhstatfs(const fhandle_t *, struct statfs *);
   #endif /* __BSD_VISIBLE */
   __END_DECLS
   #endif /* _KERNEL */
   #endif /* !_SYS_MOUNT_H_ */

Cache object: e2c5ae228839c062c8176e139ceacaaa