VFS_SET — set up loadable file system vfsconf

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

Debian                                           August 16, 2018                                      VFS_SET(9)

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.

       VFS_SET — set up loadable file system vfsconf

       /*
        * 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);

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

#include<sys/param.h>#include<sys/kernel.h>#include<sys/module.h>#include<sys/mount.h>voidVFS_SET(structvfsops*vfsops, fsname, intflags);