VFS_SET(9) | FreeBSD Kernel Developer's Manual | VFS_SET(9) |
NAME
VFS_SET — set up loadable file system vfsconfSYNOPSIS
#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 security.jail.mount_allowed sysctl is set to 1.
- 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);
AUTHORS
This manual page was written by <davidc@acns.ab.ca>.February 21, 2013 | FreeBSD |