VFS_SET(9)             FreeBSD Kernel Developer's Manual            VFS_SET(9)

NAME
     VFS_SET - set up loadable file system vfsconf

SYNOPSIS
     #include <sys/param.h>
     #include <sys/kernel.h>
     #include <sys/module.h>
     #include <sys/mount.h>

     void
     VFS_SET(struct vfsops *vfsops, fsname, int flags);

DESCRIPTION
     VFS_SET() creates a vfsconf structure for the loadable module with the
     given vfsops, fsname and flags, and declares it by calling
     DECLARE_MODULE(9) using vfs_modevent() as the event handler.

     Possible values for the flags argument are:

     VFCF_STATIC          File system should be statically available in the
                          kernel.

     VFCF_NETWORK         Network exportable file system.

     VFCF_READONLY        Does not support write operations.

     VFCF_SYNTHETIC       Pseudo file system, data does not represent on-disk
                          files.

     VFCF_LOOPBACK        Loopback file system layer.

     VFCF_UNICODE         File names are stored as Unicode.

     VFCF_JAIL            Can be mounted from within a jail if allow.mount and
                          allow.mount.<fsname> jail parameters are set.

     VFCF_DELEGADMIN      Supports delegated administration if vfs.usermount
                          sysctl is set to 1.

     VFCF_SBDRY           When in VFS method, the thread suspension is
                          deferred to the user boundary upon arrival of stop
                          action.

PSEUDOCODE
     /*
      * Fill in the fields for which we have special methods.
      * The others are initially null.  This tells vfs to change them to
      * pointers to vfs_std* functions during file system registration.
      */
     static struct vfsops myfs_vfsops = {
             .vfs_mount =    myfs_mount,
             .vfs_root =     myfs_root,
             .vfs_statfs =   myfs_statfs,
             .vfs_unmount =  myfs_unmount,
     };

     VFS_SET(myfs_vfsops, myfs, 0);

SEE ALSO
     jail(2), jail(8), DECLARE_MODULE(9), vfs_modevent(9), vfsconf(9)

AUTHORS
     This manual page was written by Chad David <davidc@acns.ab.ca>.

FreeBSD 13.1-RELEASE-p6         August 16, 2018        FreeBSD 13.1-RELEASE-p6