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

     /*
      * 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. 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.
     *
     *      @(#)mount.h     8.21 (Berkeley) 5/20/95
     * $FreeBSD: src/sys/sys/mount.h,v 1.89.2.7 2003/04/04 20:35:57 tegge Exp $
     */
    
    #ifndef _SYS_MOUNT_H_
    #define _SYS_MOUNT_H_
    
    #include <sys/ucred.h>
    #include <sys/tree.h>
    
    #ifndef _KERNEL
    #if !defined(_POSIX_C_SOURCE) && !defined(_XOPEN_SOURCE)
    #include <sys/stat.h>
    #endif /* !_POSIX_C_SOURCE */
    #endif /* !_KERNEL */
    
    #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
    #ifndef _SYS_QUEUE_H_
    #include <sys/queue.h>
    #endif
    #ifndef _SYS_LOCK_H_
    #include <sys/lock.h>
    #endif
    #ifndef _SYS_NAMECACHE_H_
    #include <sys/namecache.h>
    #endif
    #ifndef _SYS_STATVFS_H_
    #include <sys/statvfs.h>
    #endif
    #ifndef _SYS_THREAD_H_
    #include <sys/thread.h>
    #endif
    #include <sys/vfs_quota.h>
    #endif
    
    struct thread;
    struct journal;
    struct vop_ops;
    struct vop_mountctl_args;
    struct statvfs;
    struct vmntvnodescan_info;
    
    typedef struct fsid { int32_t val[2]; } fsid_t; /* file system id type */
    
    /*
     * File identifier.  These are unique per filesystem on a single machine.
     *
     * fix_ext is also used by HAMMER.
     */
    #define MAXFIDSZ        16
    
    struct fid {
            u_short         fid_len;                /* length of data in bytes */
            u_short         fid_ext;                /* extended data           */
            char            fid_data[MAXFIDSZ];     /* data (variable length) */
    };
    
    /*
     * file system statistics
     */
    
    #define MFSNAMELEN      16      /* length of fs type name, including null */
    #define MNAMELEN        80      /* length of buffer for returned name */
    
    struct statfs {
            long    f_spare2;               /* placeholder */
            long    f_bsize;                /* fundamental file system block size */
           long    f_iosize;               /* optimal transfer block size */
           long    f_blocks;               /* total data blocks in file system */
           long    f_bfree;                /* free blocks in fs */
           long    f_bavail;               /* free blocks avail to non-superuser */
           long    f_files;                /* total file nodes in file system */
           long    f_ffree;                /* free file nodes in fs */
           fsid_t  f_fsid;                 /* file system id */
           uid_t   f_owner;                /* user that mounted the filesystem */
           int     f_type;                 /* type of filesystem */
           int     f_flags;                /* copy of mount exported flags */
           long    f_syncwrites;           /* count of sync writes since mount */
           long    f_asyncwrites;          /* count of async writes since mount */
           char    f_fstypename[MFSNAMELEN]; /* fs type name */
           char    f_mntonname[MNAMELEN];  /* directory on which mounted */
           long    f_syncreads;            /* count of sync reads since mount */
           long    f_asyncreads;           /* count of async reads since mount */
           short   f_spares1;              /* unused spare */
           char    f_mntfromname[MNAMELEN];/* mounted filesystem */
           short   f_spares2;              /* unused spare */
           long    f_spare[2];             /* unused spare */
   };
   
   #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
   
   /*
    * bio_ops are associated with the mount structure and used in conjuction
    * with the b_dep field in a buffer.  Currently softupdates and HAMMER
    * utilize this field.
    *
    * All bio_ops callbacks must be MPSAFE and could be called without
    * the mplock.
    */
   struct buf;
   
   struct bio_ops {
           TAILQ_ENTRY(bio_ops) entry;
           void    (*io_start) (struct buf *);
           void    (*io_complete) (struct buf *);
           void    (*io_deallocate) (struct buf *);
           int     (*io_fsync) (struct vnode *);
           int     (*io_sync) (struct mount *);
           void    (*io_movedeps) (struct buf *, struct buf *);
           int     (*io_countdeps) (struct buf *, int);
           int     (*io_checkread) (struct buf *);
           int     (*io_checkwrite) (struct buf *);
   };
   
   #endif
   
   /*
    * vfs quota accounting
    *
    * uids and gids often come in contiguous blocks; use a small linear
    * array as the basic in-memory accounting allocation unit
    */
   #define ACCT_CHUNK_BITS 5
   #define ACCT_CHUNK_NIDS (1<<ACCT_CHUNK_BITS)
   #define ACCT_CHUNK_MASK (ACCT_CHUNK_NIDS - 1)
   
   struct ac_counters {
           uint64_t space;
           uint64_t limit;
   };
   
   struct ac_unode {
           RB_ENTRY(ac_unode)      rb_entry;
           uid_t                   left_bits;
           struct ac_counters      uid_chunk[ACCT_CHUNK_NIDS];
   };
   
   struct ac_gnode {
           RB_ENTRY(ac_gnode)      rb_entry;
           gid_t                   left_bits;
           struct ac_counters      gid_chunk[ACCT_CHUNK_NIDS];
   };
   
   #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
   
   struct vfs_acct {
           RB_HEAD(ac_utree,ac_unode)      ac_uroot;
           RB_HEAD(ac_gtree,ac_gnode)      ac_groot;
           uint64_t                        ac_bytes;       /* total bytes used */
           uint64_t                        ac_limit;
           struct spinlock                 ac_spin;        /* protective spinlock */
   };
   
   
   /*
    * 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.
    *
    * NOTE: mnt_nvnodelist and mnt_reservedvnlist.  At the moment vnodes
    * are linked into mnt_nvnodelist.  At some point in the near future the
    * vnode list will be split into a 'dirty' and 'clean' list. mnt_nvnodelist
    * will become the dirty list and mnt_reservedvnlist will become the 'clean'
    * list.  Filesystem kld's syncing code should remain compatible since
    * they only need to scan the dirty vnode list (nvnodelist -> dirtyvnodelist).
    *
    * NOTE: All VFSs must at least populate mnt_vn_ops or those VOP ops that
    * only take namecache pointers will not be able to find their operations
    * vector via namecache->nc_mount.
    *
    * MPSAFE NOTES: mnt_lock interlocks mounting and unmounting operations.
    *
    *               mnt_token interlocks operations which adjust the mount
    *               structure and will also be held through VFS operations
    *               for VFSes not flagged MPSAFE.
    */
   TAILQ_HEAD(vnodelst, vnode);
   TAILQ_HEAD(journallst, journal);
   
   struct mount {
           TAILQ_ENTRY(mount) mnt_list;            /* mount list */
           struct vfsops   *mnt_op;                /* operations on fs */
           struct vfsconf  *mnt_vfc;               /* configuration info */
           long            mnt_namecache_gen;      /* ++ to clear negative hits */
           struct vnode    *mnt_syncer;            /* syncer vnode */
           struct syncer_ctx *mnt_syncer_ctx;      /* syncer process context */
           struct vnodelst mnt_nvnodelist;         /* list of vnodes this mount */
           TAILQ_HEAD(,vmntvnodescan_info) mnt_vnodescan_list;
           struct lock     mnt_lock;               /* mount structure lock */
           int             mnt_flag;               /* flags shared with user */
           int             mnt_kern_flag;          /* kernel only flags */
           int             mnt_maxsymlinklen;      /* max size of short symlink */
           struct statfs   mnt_stat;               /* cache of filesystem stats */
           struct statvfs  mnt_vstat;              /* extended stats */
           qaddr_t         mnt_data;               /* private data */
           time_t          mnt_time;               /* last time written*/
           u_int           mnt_iosize_max;         /* max IO request size */
           struct vnodelst mnt_reservedvnlist;     /* (future) dirty vnode list */
           int             mnt_nvnodelistsize;     /* # of vnodes on this mount */
   
           /*
            * ops vectors have a fixed stacking order.  All primary calls run
            * through mnt_vn_ops.  This field is typically assigned to 
            * mnt_vn_norm_ops.  If journaling has been enabled this field is
            * usually assigned to mnt_vn_journal_ops.
            */
           struct vop_ops  *mnt_vn_use_ops;        /* current ops set */
   
           struct vop_ops  *mnt_vn_coherency_ops;  /* cache coherency ops */
           struct vop_ops  *mnt_vn_journal_ops;    /* journaling ops */
           struct vop_ops  *mnt_vn_norm_ops;       /* for use by the VFS */
           struct vop_ops  *mnt_vn_spec_ops;       /* for use by the VFS */
           struct vop_ops  *mnt_vn_fifo_ops;       /* for use by the VFS */
           struct nchandle mnt_ncmountpt;          /* mount point */
           struct nchandle mnt_ncmounton;          /* mounted on */
           int             mnt_refs;               /* nchandle references */
           struct lwkt_token mnt_token;            /* token lock if not MPSAFE */
           struct journallst mnt_jlist;            /* list of active journals */
           u_int8_t        *mnt_jbitmap;           /* streamid bitmap */
           int16_t         mnt_streamid;           /* last streamid */
   
           struct bio_ops  *mnt_bioops;            /* BIO ops (hammer, softupd) */
   
           struct vfs_acct mnt_acct;               /* vfs space accounting */
   };
   
   #endif /* _KERNEL || _KERNEL_STRUCTURES */
   
   /*
    * User specifiable flags.
    */
   #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_UNION       0x00000020      /* union with underlying filesystem */
   #define MNT_ASYNC       0x00000040      /* file system written asynchronously */
   #define MNT_SUIDDIR     0x00100000      /* special handling of SUID on dirs */
   #define MNT_SOFTDEP     0x00200000      /* soft updates being done */
   #define MNT_NOSYMFOLLOW 0x00400000      /* do not follow symlinks */
   #define MNT_TRIM        0x01000000      /* Enable online FS trimming */
   #define MNT_NOATIME     0x10000000      /* disable update of file access time */
   #define MNT_NOCLUSTERR  0x40000000      /* disable cluster read */
   #define MNT_NOCLUSTERW  0x80000000      /* disable cluster write */
   
   /*
    * NFS export related 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 */
   #define MNT_EXKERB      0x00000800      /* exported with Kerberos uid mapping */
   #define MNT_EXPUBLIC    0x20000000      /* public export (WebNFS) */
   
   /*
    * Flags set by internal operations,
    * but visible to the user.
    * XXX some of these are not quite right.. (I've never seen the root flag set)
    */
   #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 */
   #define MNT_USER        0x00008000      /* mounted by a user */
   #define MNT_IGNORE      0x00800000      /* do not show entry in df */
   
   /*
    * Mask of flags that are visible to statfs()
    * XXX I think that this could now become (~(MNT_CMDFLAGS))
    * but the 'mount' program may need changing to handle this.
    */
   #define MNT_VISFLAGMASK (MNT_RDONLY     | MNT_SYNCHRONOUS | MNT_NOEXEC  | \
                           MNT_NOSUID      | MNT_NODEV     | MNT_UNION     | \
                           MNT_ASYNC       | MNT_EXRDONLY  | MNT_EXPORTED  | \
                           MNT_DEFEXPORTED | MNT_EXPORTANON| MNT_EXKERB    | \
                           MNT_LOCAL       | MNT_USER      | MNT_QUOTA     | \
                           MNT_ROOTFS      | MNT_NOATIME   | MNT_NOCLUSTERR| \
                           MNT_NOCLUSTERW  | MNT_SUIDDIR   | MNT_SOFTDEP   | \
                           MNT_IGNORE      | MNT_NOSYMFOLLOW | MNT_EXPUBLIC| \
                           MNT_TRIM)
   /*
    * External filesystem command modifier flags.
    * Unmount can use the MNT_FORCE flag.
    * XXX These are not STATES and really should be somewhere else.
    */
   #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_CMDFLAGS    (MNT_UPDATE|MNT_DELEXPORT|MNT_RELOAD|MNT_FORCE)
   /*
    * Internal filesystem control flags stored in mnt_kern_flag.
    *
    * MNTK_UNMOUNT locks the mount entry so that name lookup cannot proceed
    * past the mount point.  This keeps the subtree stable during mounts
    * and unmounts.
    *
    * MNTK_UNMOUNTF permits filesystems to detect a forced unmount while
    * dounmount() is still waiting to lock the mountpoint. This allows
    * the filesystem to cancel operations that might otherwise deadlock
    * with the unmount attempt (used by NFS).
    *
    * MNTK_NOSTKMNT prevents mounting another filesystem inside the flagged one.
    */
   #define MNTK_UNMOUNTF   0x00000001      /* forced unmount in progress */
   #define MNTK_MPSAFE     0x00010000      /* call vops without mnt_token lock */
   #define MNTK_RD_MPSAFE  0x00020000      /* vop_read is MPSAFE */
   #define MNTK_WR_MPSAFE  0x00040000      /* vop_write is MPSAFE */
   #define MNTK_GA_MPSAFE  0x00080000      /* vop_getattr is MPSAFE */
   #define MNTK_IN_MPSAFE  0x00100000      /* vop_inactive is MPSAFE */
   #define MNTK_SG_MPSAFE  0x00200000      /* vop_strategy is MPSAFE */
   #define MNTK_NCALIASED  0x00800000      /* namecached aliased */
   #define MNTK_UNMOUNT    0x01000000      /* unmount in progress */
   #define MNTK_MWAIT      0x02000000      /* waiting for unmount to finish */
   #define MNTK_WANTRDWR   0x04000000      /* upgrade to read/write requested */
   #define MNTK_FSMID      0x08000000      /* getattr supports FSMIDs */
   #define MNTK_NOSTKMNT   0x10000000      /* no stacked mount point allowed */
   #define MNTK_NOMSYNC    0x20000000      /* used by tmpfs */
   #define MNTK_THR_SYNC   0x40000000      /* fs sync thread requested */
   #define MNTK_ST_MPSAFE  0x80000000      /* (mfs) vfs_start is MPSAFE */
   
   #define MNTK_ALL_MPSAFE (MNTK_MPSAFE | MNTK_RD_MPSAFE | MNTK_WR_MPSAFE | \
                            MNTK_GA_MPSAFE | MNTK_IN_MPSAFE | MNTK_SG_MPSAFE | \
                            MNTK_ST_MPSAFE)
   
   /*
    * mountlist_*() defines
    */
   #define MNTSCAN_FORWARD         0x0001
   #define MNTSCAN_REVERSE         0x0002
   #define MNTSCAN_NOBUSY          0x0004
   
   #define MNTINS_FIRST            0x0001
   #define MNTINS_LAST             0x0002
   
   /*
    * Sysctl CTL_VFS definitions.
    *
    * Second level identifier specifies which filesystem. Second level
    * identifier VFS_VFSCONF returns information about all filesystems.
    * Second level identifier VFS_GENERIC is non-terminal.
    */
   #define VFS_VFSCONF             0       /* get configured 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 */
   
   /*
    * VFS MPLOCK helper.
    */
   #define VFS_MPLOCK_DECLARE      int xlock_mpsafe
   
   #define VFS_MPLOCK1(mp)         VFS_MPLOCK_FLAG(mp, MNTK_MPSAFE)
   
   #define VFS_MPLOCK2(mp)                                                 \
                   do {                                                    \
                           if (xlock_mpsafe) {                             \
                                   get_mplock();   /* TEMPORARY */         \
                                   lwkt_gettoken(&mp->mnt_token);          \
                                   xlock_mpsafe = 0;                       \
                           }                                               \
                   } while(0)
   
   #define VFS_MPLOCK_FLAG(mp, flag)                                       \
                   do {                                                    \
                           if (mp->mnt_kern_flag & flag) {                 \
                                   xlock_mpsafe = 1;                       \
                           } else {                                        \
                                   get_mplock();   /* TEMPORARY */         \
                                   lwkt_gettoken(&mp->mnt_token);          \
                                   xlock_mpsafe = 0;                       \
                           }                                               \
                   } while(0)
   
   #define VFS_MPUNLOCK(mp)                                                \
                   do {                                                    \
                           if (xlock_mpsafe == 0) {                        \
                                   lwkt_reltoken(&mp->mnt_token);          \
                                   rel_mplock();   /* TEMPORARY */         \
                           }                                               \
                   } while(0)
   
   /*
    * Flags for various system call interfaces.
    *
    * waitfor flags to vfs_sync() and getfsstat()
    */
   #define MNT_WAIT        0x0001  /* synchronously wait for I/O to complete */
   #define MNT_NOWAIT      0x0002  /* start all I/O, but do not wait for it */
   #define MNT_LAZY        0x0004  /* be lazy and do not necessarily push it all */
   
   #define VOP_FSYNC_SYSCALL       0x0001  /* from system call */
   
   /*
    * 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;
   
   /*
    * 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  ucred 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 */
           char    *ex_indexfile;          /* index file for WebNFS URLs */
   };
   
   /*
    * Structure holding information for a publicly exported filesystem
    * (WebNFS). Currently the specs allow just for one such filesystem.
    */
   struct nfs_public {
           int             np_valid;       /* Do we hold valid information */
           fhandle_t       np_handle;      /* Filehandle for pub fs (internal) */
           struct mount    *np_mount;      /* Mountpoint of exported fs */
           char            *np_index;      /* Index file */
   };
   
   /*
    * 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.
    */
   #ifndef _SYS_QUEUE_H_
   #include <sys/queue.h>
   #endif
   struct vfsconf {
           struct  vfsops *vfc_vfsops;     /* filesystem operations vector */
           char    vfc_name[MFSNAMELEN];   /* filesystem type name */
           int     vfc_typenum;            /* historic filesystem type number */
           int     vfc_refcount;           /* number mounted of this type */
           int     vfc_flags;              /* permanent flags */
           STAILQ_ENTRY(vfsconf) vfc_next; /* next in list */
   };
   
   struct ovfsconf {
           void    *vfc_vfsops;
           char    vfc_name[32];
           int     vfc_index;
           int     vfc_refcount;
           int     vfc_flags;
   };
   
   /*
    * NB: these flags refer to IMPLEMENTATION properties, not properties of
    * any actual mounts; i.e., it does not make sense to change the flags.
    */
   #define VFCF_STATIC     0x00010000      /* statically compiled into kernel */
   #define VFCF_NETWORK    0x00020000      /* may get data over the network */
   #define VFCF_READONLY   0x00040000      /* writes are not implemented */
   #define VFCF_SYNTHETIC  0x00080000      /* data does not represent real files */
   #define VFCF_LOOPBACK   0x00100000      /* aliases some other mounted FS */
   #define VFCF_UNICODE    0x00200000      /* stores file names as Unicode*/
   
   #ifdef _KERNEL
   
   #ifdef MALLOC_DECLARE
   MALLOC_DECLARE(M_MOUNT);
   #endif
   extern int nfs_mount_type;      /* vfc_typenum for nfs, or -1 */
   
   struct vfsconf *vfsconf_find_by_name(const char *);
   struct vfsconf *vfsconf_find_by_typenum(int);
   int vfsconf_get_maxtypenum(void);
   int vfsconf_each(int (*)(struct vfsconf *, void *), void *);
   
   #endif
   
   #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
   
   TAILQ_HEAD(mntlist, mount);     /* struct mntlist */
   
   /*
    * Operations supported on mounted file system.
    */
   struct nlookupdata;
   struct nlookupdata;
   struct mbuf;
   
   typedef int vfs_mount_t(struct mount *mp, char *path, caddr_t data,
                                       struct ucred *cred);
   typedef int vfs_start_t(struct mount *mp, int flags);
   typedef int vfs_unmount_t(struct mount *mp, int mntflags);
   typedef int vfs_root_t(struct mount *mp, struct vnode **vpp);
   typedef int vfs_quotactl_t(struct mount *mp, int cmds, uid_t uid, caddr_t arg,
                                       struct ucred *cred);
   typedef int vfs_statfs_t(struct mount *mp, struct statfs *sbp,
                                       struct ucred *cred);
   typedef int vfs_statvfs_t(struct mount *mp, struct statvfs *sbp,
                                       struct ucred *cred);
   typedef int vfs_sync_t(struct mount *mp, int waitfor);
   typedef int vfs_vget_t(struct mount *mp, struct vnode *dvp,
                                       ino_t ino, struct vnode **vpp);
   typedef int vfs_fhtovp_t(struct mount *mp, struct vnode *rootvp,
                                       struct fid *fhp, struct vnode **vpp);
   typedef int vfs_checkexp_t(struct mount *mp, struct sockaddr *nam,
                                       int *extflagsp, struct ucred **credanonp);
   typedef int vfs_vptofh_t(struct vnode *vp, struct fid *fhp);
   typedef int vfs_init_t(struct vfsconf *);
   typedef int vfs_uninit_t(struct vfsconf *);
   typedef int vfs_extattrctl_t(struct mount *mp, int cmd, struct vnode *vp,
                       int attrnamespace, const char *attrname,
                       struct ucred *cred);
   typedef int vfs_acinit_t(struct mount *mp);
   typedef void vfs_acdone_t(struct mount *mp);
   typedef void vfs_account_t(struct mount *mp,
                           uid_t uid, gid_t gid, int64_t delta);
   typedef void vfs_ncpgen_set_t(struct mount *mp, struct namecache *ncp);
   typedef int vfs_ncpgen_test_t(struct mount *mp, struct namecache *ncp);
   
   int vfs_mount(struct mount *mp, char *path, caddr_t data, struct ucred *cred);
   int vfs_start(struct mount *mp, int flags);
   int vfs_unmount(struct mount *mp, int mntflags);
   int vfs_root(struct mount *mp, struct vnode **vpp);
   int vfs_quotactl(struct mount *mp, int cmds, uid_t uid, caddr_t arg,
                                   struct ucred *cred);
   int vfs_statfs(struct mount *mp, struct statfs *sbp, struct ucred *cred);
   int vfs_statvfs(struct mount *mp, struct statvfs *sbp, struct ucred *cred);
   int vfs_sync(struct mount *mp, int waitfor);
   int vfs_vget(struct mount *mp, struct vnode *dvp,
                                   ino_t ino, struct vnode **vpp);
   int vfs_fhtovp(struct mount *mp, struct vnode *rootvp,
                                   struct fid *fhp, struct vnode **vpp);
   int vfs_checkexp(struct mount *mp, struct sockaddr *nam,
                                   int *extflagsp, struct ucred **credanonp);
   int vfs_vptofh(struct vnode *vp, struct fid *fhp);
   int vfs_init(struct vfsconf *vfc);
   int vfs_uninit(struct vfsconf *vfc, struct vfsconf *vfsp);
   int vfs_extattrctl(struct mount *mp, int cmd, struct vnode *vp,
                       int attrnamespace, const char *attrname,
                       struct ucred *cred);
   
   
   struct vfsops {
           vfs_mount_t     *vfs_mount;
           vfs_start_t     *vfs_start;
           vfs_unmount_t   *vfs_unmount;
           vfs_root_t      *vfs_root;
           vfs_quotactl_t  *vfs_quotactl;
           vfs_statfs_t    *vfs_statfs;
           vfs_sync_t      *vfs_sync;
           vfs_vget_t      *vfs_vget;
           vfs_fhtovp_t    *vfs_fhtovp;
           vfs_checkexp_t  *vfs_checkexp;
           vfs_vptofh_t    *vfs_vptofh;
           vfs_init_t      *vfs_init;
           vfs_uninit_t    *vfs_uninit;
           vfs_extattrctl_t *vfs_extattrctl;
           vfs_statvfs_t   *vfs_statvfs;
           vfs_acinit_t    *vfs_acinit;
           vfs_acdone_t    *vfs_acdone;
           vfs_account_t   *vfs_account;
           vfs_ncpgen_set_t        *vfs_ncpgen_set;
           vfs_ncpgen_test_t       *vfs_ncpgen_test;
   };
   
   #define VFS_MOUNT(MP, PATH, DATA, CRED)         \
           vfs_mount(MP, PATH, DATA, CRED)
   #define VFS_START(MP, FLAGS)                    \
           vfs_start(MP, FLAGS)
   #define VFS_UNMOUNT(MP, FORCE)                  \
           vfs_unmount(MP, FORCE)
   #define VFS_ROOT(MP, VPP)                       \
           vfs_root(MP, VPP)
   #define VFS_QUOTACTL(MP, C, U, A, CRED)         \
           vfs_quotactl(MP, C, U, A, CRED)
   #define VFS_STATFS(MP, SBP, CRED)               \
           vfs_statfs(MP, SBP, CRED)
   #define VFS_STATVFS(MP, SBP, CRED)              \
           vfs_statvfs(MP, SBP, CRED)
   #define VFS_SYNC(MP, WAIT)                      \
           vfs_sync(MP, WAIT)
   #define VFS_VGET(MP, DVP, INO, VPP)             \
           vfs_vget(MP, DVP, INO, VPP)
   #define VFS_FHTOVP(MP, ROOTVP, FIDP, VPP)       \
           vfs_fhtovp(MP, ROOTVP, FIDP, VPP)
   #define VFS_VPTOFH(VP, FIDP)                    \
           vfs_vptofh(VP, FIDP)
   #define VFS_CHECKEXP(MP, NAM, EXFLG, CRED)      \
           vfs_checkexp(MP, NAM, EXFLG, CRED)
   #define VFS_EXTATTRCTL(MP, C, FVP, NS, N, CRED) \
           vfs_extattrctl(MP, C, FVP, NS, N, CRED)
   #define VFS_ACCOUNT(MP, U, G, D) \
           if ((MP->mnt_op->vfs_account != NULL) && (D != 0)) \
                   MP->mnt_op->vfs_account(MP, U, G, D);
   #define VFS_ACINIT(MP, ERROR) \
           if (vfs_quota_enabled && MP->mnt_op->vfs_acinit != NULL) \
                   ERROR = MP->mnt_op->vfs_acinit(MP);
   #define VFS_ACDONE(MP) \
           if (vfs_quota_enabled && MP->mnt_op->vfs_acdone != NULL) \
                   MP->mnt_op->vfs_acdone(MP);
   #define VFS_NCPGEN_SET(MP, NCP) \
           MP->mnt_op->vfs_ncpgen_set(MP, NCP)
   #define VFS_NCPGEN_TEST(MP, NCP) \
           MP->mnt_op->vfs_ncpgen_test(MP, NCP)
   
   #endif
   
   #ifdef _KERNEL
   
   #include <sys/module.h>
   
   #define VFS_SET(vfsops, fsname, flags) \
           static struct vfsconf fsname ## _vfsconf = {            \
                   &vfsops,                                        \
                   #fsname,                                        \
                   -1,                                             \
                   0,                                              \
                   flags,                                          \
                   { NULL },                                       \
           };                                                      \
           static moduledata_t fsname ## _mod = {                  \
                   #fsname,                                        \
                   vfs_modevent,                                   \
                   & fsname ## _vfsconf                            \
           };                                                      \
           DECLARE_MODULE(fsname, fsname ## _mod, SI_SUB_VFS, SI_ORDER_MIDDLE)
   
   #endif
   
   #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
   
   #include <net/radix.h>
   
   #define AF_MAX          36      /* XXX */
   
   /*
    * Network address lookup element
    */
   struct netcred {
           struct  radix_node netc_rnodes[2];
           int     netc_exflags;
           struct  ucred netc_anon;
   };
   
   /*
    * Network export information
    */
   struct netexport {
           struct  netcred ne_defexported;               /* Default export */
           struct  radix_node_head *ne_rtable[AF_MAX+1]; /* Individual exports */
   };
   
   #endif
   
   #ifdef _KERNEL
   
   extern  char *mountrootfsname;
   
   /*
    * exported vnode operations
    */
   int     dounmount (struct mount *, int);
   int     vfs_setpublicfs                     /* set publicly exported fs */
             (struct mount *, struct netexport *, const struct export_args *);
   int     vfs_lock (struct mount *);         /* lock a vfs */
   void    vfs_msync (struct mount *, int);
   void    vfs_unlock (struct mount *);       /* unlock a vfs */
   int     vfs_busy (struct mount *, int);
   int     vfs_export                          /* process mount export info */
             (struct mount *, struct netexport *, const struct export_args *);
   struct  netcred *vfs_export_lookup          /* lookup host in fs export list */
             (struct mount *, struct netexport *, struct sockaddr *);
   int     vfs_allocate_syncvnode (struct mount *);
   void    vfs_getnewfsid (struct mount *);
   int     vfs_setfsid(struct mount *mp, fsid_t *template);
   cdev_t  vfs_getrootfsid (struct mount *);
   struct  mount *vfs_getvfs (fsid_t *);      /* return vfs given fsid */
   int     vfs_modevent (module_t, int, void *);
   int     vfs_mountedon (struct vnode *);    /* is a vfs mounted on vp */
   int     vfs_rootmountalloc (char *, char *, struct mount **);
   void    vfs_unbusy (struct mount *);
   void    vfs_unmountall (void);
   int     vfs_register (struct vfsconf *);
   int     vfs_unregister (struct vfsconf *);
   extern  struct nfs_public nfs_pub;
   
   /* 
    * Declarations for these vfs default operations are located in 
    * kern/vfs_default.c, they should be used instead of making "dummy" 
    * functions or casting entries in the VFS op table to "enopnotsupp()".
    */ 
   vfs_start_t     vfs_stdstart;
   vfs_mount_t     vfs_stdmount;
   vfs_unmount_t   vfs_stdunmount;
   vfs_root_t      vfs_stdroot;
   vfs_quotactl_t  vfs_stdquotactl;
   vfs_statfs_t    vfs_stdstatfs;
   vfs_statvfs_t   vfs_stdstatvfs;
   vfs_sync_t      vfs_stdsync;
   vfs_sync_t      vfs_stdnosync;
   vfs_vget_t      vfs_stdvget;
   vfs_fhtovp_t    vfs_stdfhtovp;
   vfs_checkexp_t  vfs_stdcheckexp;
   vfs_vptofh_t    vfs_stdvptofh;
   vfs_init_t      vfs_stdinit;
   vfs_uninit_t    vfs_stduninit;
   vfs_extattrctl_t vfs_stdextattrctl;
   vfs_acinit_t    vfs_stdac_init;
   vfs_acdone_t    vfs_stdac_done;
   vfs_account_t   vfs_stdaccount;
   vfs_account_t   vfs_noaccount;
   vfs_ncpgen_set_t        vfs_stdncpgen_set;
   vfs_ncpgen_test_t       vfs_stdncpgen_test;
   
   struct vop_access_args;
   int vop_helper_access(struct vop_access_args *ap, uid_t ino_uid, gid_t ino_gid,
                           mode_t ino_mode, u_int32_t ino_flags);
   int vop_helper_setattr_flags(u_int32_t *ino_flags, u_int32_t vaflags,
                           uid_t uid, struct ucred *cred);
   uid_t vop_helper_create_uid(struct mount *mp, mode_t dmode, uid_t duid,
                           struct ucred *cred, mode_t *modep);
   int vop_helper_chmod(struct vnode *vp, mode_t new_mode, struct ucred *cred,
                           uid_t cur_uid, gid_t cur_gid, mode_t *cur_modep);
   int vop_helper_chown(struct vnode *vp, uid_t new_uid, gid_t new_gid,
                           struct ucred *cred,
                           uid_t *cur_uidp, gid_t *cur_gidp, mode_t *cur_modep);
   int vop_helper_read_shortcut(struct vop_read_args *ap);
   
   void    add_bio_ops(struct bio_ops *ops);
   void    rem_bio_ops(struct bio_ops *ops);
   
   int     journal_mountctl(struct vop_mountctl_args *ap);
   void    journal_remove_all_journals(struct mount *mp, int flags);
   
   void    mountlist_insert(struct mount *, int);
   int     mountlist_interlock(int (*callback)(struct mount *), struct mount *);
   struct mount *mountlist_boot_getfirst(void);
   void    mountlist_remove(struct mount *mp);
   int     mountlist_exists(struct mount *mp);
   int     mountlist_scan(int (*callback)(struct mount *, void *), void *, int);
   struct mount *mount_get_by_nc(struct namecache *ncp);
   #else /* !_KERNEL */
   
   #include <sys/cdefs.h>
   
   __BEGIN_DECLS
   int     fstatfs (int, struct statfs *);
   int     getfh (const char *, fhandle_t *);
   int     getfsstat (struct statfs *, long, int);
   int     getmntinfo (struct statfs **, int);
   int     getmntvinfo (struct statfs **, struct statvfs **, int);
   int     mount (const char *, const char *, int, void *);
   int     statfs (const char *, struct statfs *);
   int     unmount (const char *, int);
   int     fhopen (const struct fhandle *, int);
   int     fhstat (const struct fhandle *, struct stat *);
   int     fhstatfs (const struct fhandle *, struct statfs *);
   
   /* C library stuff */
   void    endvfsent (void);
   struct  ovfsconf *getvfsbyname (const char *);
   struct  ovfsconf *getvfsbytype (int);
   struct  ovfsconf *getvfsent (void);
   #define getvfsbyname    new_getvfsbyname
   int     new_getvfsbyname (const char *, struct vfsconf *);
   void    setvfsent (int);
   int     vfsisloadable (const char *);
   int     vfsload (const char *);
   __END_DECLS
   
   #endif /* _KERNEL */
   
   #endif /* !_SYS_MOUNT_H_ */
   

Cache object: 729b4c89f0803732bf943e6cf437429f