#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/vnode.h>
#include <sys/proc.h>
#include <sys/mount.h>
#include <sys/malloc.h>
#include "devfs.h"
#include "devfsdefs.h"
static int devfs_statfs( struct mount *mp, struct statfs *sbp, struct proc *p);
static struct vfsconf * devfs_vfsp = 0;
static int kernel_mount = 0;
static int
devfs_init(struct vfsconf *vfsp)
{
devfs_vfsp = vfsp;
if (devfs_sinit())
return (EOPNOTSUPP);
printf("devfs enabled\n");
devfs_make_node(makedev(0, 0), DEVFS_CHAR,
UID_ROOT, GID_WHEEL, 0622, "console");
devfs_make_node(makedev(2, 0), DEVFS_CHAR,
UID_ROOT, GID_WHEEL, 0666, "tty");
devfs_make_node(makedev(3, 0), DEVFS_CHAR,
UID_ROOT, GID_KMEM, 0640, "mem");
devfs_make_node(makedev(3, 1), DEVFS_CHAR,
UID_ROOT, GID_KMEM, 0640, "kmem");
devfs_make_node(makedev(3, 2), DEVFS_CHAR,
UID_ROOT, GID_WHEEL, 0666, "null");
devfs_make_node(makedev(3, 3), DEVFS_CHAR,
UID_ROOT, GID_WHEEL, 0666, "zero");
devfs_make_node(makedev(6, 0), DEVFS_CHAR,
UID_ROOT, GID_WHEEL, 0600, "klog");
return 0;
}
int
devfs_mount(struct mount *mp, char *path, caddr_t data,
struct nameidata *ndp, struct proc *p)
{
struct devfsmount *devfs_mp_p;
int error;
size_t size;
if (mp->mnt_flag & MNT_UPDATE)
{
return 0;
}
MALLOC(devfs_mp_p, struct devfsmount *, sizeof(struct devfsmount),
M_DEVFSMNT, M_WAITOK);
if (devfs_mp_p == NULL)
return (ENOMEM);
bzero(devfs_mp_p,sizeof(*devfs_mp_p));
devfs_mp_p->mount = mp;
mp->mnt_data = (qaddr_t)devfs_mp_p;
mp->mnt_stat.f_type = mp->mnt_vfc->vfc_typenum;
mp->mnt_stat.f_fsid.val[0] = (int32_t)(void *)devfs_mp_p;
mp->mnt_stat.f_fsid.val[1] = mp->mnt_stat.f_type;
mp->mnt_flag |= MNT_LOCAL;
DEVFS_LOCK(p);
error = dev_dup_plane(devfs_mp_p);
DEVFS_UNLOCK(p);
if (error) {
mp->mnt_data = (qaddr_t)0;
FREE((caddr_t)devfs_mp_p, M_DEVFSMNT);
return (error);
}
if (!kernel_mount) {
copyinstr(path, (caddr_t)mp->mnt_stat.f_mntonname,
sizeof(mp->mnt_stat.f_mntonname)-1, &size);
bzero(mp->mnt_stat.f_mntonname + size,
sizeof(mp->mnt_stat.f_mntonname) - size);
}
bzero(mp->mnt_stat.f_mntfromname, MNAMELEN);
bcopy("devfs",mp->mnt_stat.f_mntfromname, 5);
DEVFS_INCR_MOUNTS();
(void)devfs_statfs(mp, &mp->mnt_stat, p);
return 0;
}
static int
devfs_start(struct mount *mp, int flags, struct proc *p)
{
return 0;
}
static int
devfs_unmount( struct mount *mp, int mntflags, struct proc *p)
{
struct devfsmount *devfs_mp_p = (struct devfsmount *)mp->mnt_data;
int flags = 0;
int error;
if (mntflags & MNT_FORCE) {
flags |= FORCECLOSE;
}
error = vflush(mp, NULLVP, flags);
if (error)
return error;
DEVFS_LOCK(p);
devfs_free_plane(devfs_mp_p);
DEVFS_UNLOCK(p);
FREE((caddr_t)devfs_mp_p, M_DEVFSMNT);
DEVFS_DECR_MOUNTS();
mp->mnt_data = (qaddr_t)0;
mp->mnt_flag &= ~MNT_LOCAL;
return 0;
}
static int
devfs_root(struct mount *mp, struct vnode **vpp)
{
struct devfsmount *devfs_mp_p = (struct devfsmount *)(mp->mnt_data);
int error;
error = devfs_dntovn(devfs_mp_p->plane_root->de_dnp,vpp,
current_proc());
return error;
}
static int
devfs_quotactl(struct mount *mp, int cmds, uid_t uid, caddr_t arg,
struct proc *p)
{
return EOPNOTSUPP;
}
static int
devfs_statfs( struct mount *mp, struct statfs *sbp, struct proc *p)
{
struct devfsmount *devfs_mp_p = (struct devfsmount *)mp->mnt_data;
sbp->f_type = mp->mnt_stat.f_type;
sbp->f_flags = 0;
sbp->f_bsize = 512;
sbp->f_iosize = 512;
sbp->f_blocks = (devfs_stats.mounts * sizeof(struct devfsmount)
+ devfs_stats.nodes * sizeof(devnode_t)
+ devfs_stats.entries * sizeof(devdirent_t)
+ devfs_stats.stringspace
) / sbp->f_bsize;
sbp->f_bfree = 0;
sbp->f_bavail = 0;
sbp->f_files = devfs_stats.nodes;
sbp->f_ffree = 0;
sbp->f_fsid.val[0] = (int32_t)(void *)devfs_mp_p;
sbp->f_fsid.val[1] = mp->mnt_stat.f_type;
if (sbp != &mp->mnt_stat) {
bcopy((caddr_t)mp->mnt_stat.f_mntonname,
(caddr_t)&sbp->f_mntonname[0], MNAMELEN);
bcopy((caddr_t)mp->mnt_stat.f_mntfromname,
(caddr_t)&sbp->f_mntfromname[0], MNAMELEN);
}
return 0;
}
static int
devfs_sync(struct mount *mp, int waitfor,struct ucred *cred,struct proc *p)
{
return (0);
}
static int
devfs_vget(struct mount *mp, void * ino,struct vnode **vpp)
{
return EOPNOTSUPP;
}
static int
devfs_fhtovp (struct mount *mp, struct fid *fhp, struct mbuf *nam,
struct vnode **vpp, int *exflagsp, struct ucred **credanonp)
{
return (EINVAL);
}
static int
devfs_vptofh (struct vnode *vp, struct fid *fhp)
{
return (EINVAL);
}
static int
devfs_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p)
int *name;
u_int namelen;
void *oldp;
size_t *oldlenp;
void *newp;
size_t newlen;
struct proc *p;
{
return (EOPNOTSUPP);
}
#include <sys/namei.h>
int
devfs_kernel_mount(char * mntname)
{
struct mount *mp;
int error;
struct proc *procp;
struct nameidata nd;
struct vnode * vp;
if (devfs_vfsp == NULL) {
printf("devfs_kernel_mount: devfs_vfsp is NULL\n");
return (EINVAL);
}
procp = current_proc();
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_SYSSPACE,
mntname, procp);
if ((error = namei(&nd))) {
printf("devfs_kernel_mount: failed to find directory '%s', %d",
mntname, error);
return (error);
}
vp = nd.ni_vp;
if ((error = vinvalbuf(vp, V_SAVE, procp->p_ucred, procp, 0, 0))) {
printf("devfs_kernel_mount: vinval failed: %d\n", error);
vput(vp);
return (error);
}
if (vp->v_type != VDIR) {
printf("devfs_kernel_mount: '%s' is not a directory\n", mntname);
vput(vp);
return (ENOTDIR);
}
if (vp->v_mountedhere != NULL) {
vput(vp);
return (EBUSY);
}
mp = _MALLOC_ZONE((u_long)sizeof(struct mount), M_MOUNT, M_WAITOK);
bzero((char *)mp, (u_long)sizeof(struct mount));
lockinit(&mp->mnt_lock, PVFS, "vfslock", 0, 0);
(void)vfs_busy(mp, LK_NOWAIT, 0, procp);
LIST_INIT(&mp->mnt_vnodelist);
mp->mnt_op = devfs_vfsp->vfc_vfsops;
mp->mnt_vfc = devfs_vfsp;
devfs_vfsp->vfc_refcount++;
mp->mnt_flag = 0;
mp->mnt_flag |= devfs_vfsp->vfc_flags & MNT_VISFLAGMASK;
strncpy(mp->mnt_stat.f_fstypename, devfs_vfsp->vfc_name, MFSNAMELEN);
vp->v_mountedhere = mp;
mp->mnt_vnodecovered = vp;
mp->mnt_stat.f_owner = procp->p_ucred->cr_uid;
(void) copystr(mntname, mp->mnt_stat.f_mntonname, MNAMELEN - 1, 0);
kernel_mount = 1;
error = devfs_mount(mp, mntname, NULL, NULL, procp);
kernel_mount = 0;
if (error) {
printf("devfs_kernel_mount: mount %s failed: %d", mntname, error);
mp->mnt_vfc->vfc_refcount--;
vfs_unbusy(mp, procp);
_FREE_ZONE(mp, sizeof (struct mount), M_MOUNT);
vput(vp);
return (error);
}
printf("devfs on %s\n", mntname);
simple_lock(&mountlist_slock);
CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list);
simple_unlock(&mountlist_slock);
VOP_UNLOCK(vp, 0, procp);
vfs_unbusy(mp, procp);
return (0);
}
struct vfsops devfs_vfsops = {
devfs_mount,
devfs_start,
devfs_unmount,
devfs_root,
devfs_quotactl,
devfs_statfs,
devfs_sync,
devfs_vget,
devfs_fhtovp,
devfs_vptofh,
devfs_init,
devfs_sysctl,
};