#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/vnode_internal.h>
#include <sys/proc.h>
#include <sys/kauth.h>
#include <sys/mount_internal.h>
#include <sys/malloc.h>
#include <libkern/OSAtomic.h>
#if CONFIG_MACF
#include <security/mac_framework.h>
#endif
#include "devfs.h"
#include "devfsdefs.h"
#if FDESC
#include "fdesc.h"
#endif
static int devfs_statfs( struct mount *mp, struct vfsstatfs *sbp, vfs_context_t ctx);
static int devfs_vfs_getattr(mount_t mp, struct vfs_attr *fsap, vfs_context_t ctx);
#if !defined(SECURE_KERNEL)
extern int setup_kmem;
__private_extern__ void devfs_setup_kmem(void);
#endif
static int
devfs_init(__unused struct vfsconf *vfsp)
{
if (devfs_sinit())
return (ENOTSUP);
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");
#if !defined(SECURE_KERNEL)
if (setup_kmem) {
devfs_setup_kmem();
}
#endif
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");
#if FDESC
devfs_fdesc_init();
#endif
return 0;
}
#if !defined(SECURE_KERNEL)
__private_extern__ void
devfs_setup_kmem(void)
{
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");
}
#endif
int
devfs_mount(struct mount *mp, __unused vnode_t devvp, __unused user_addr_t data, vfs_context_t ctx)
{
struct devfsmount *devfs_mp_p;
int error;
if (mp->mnt_flag & MNT_UPDATE)
{
return 0;
}
vfs_setlocklocal(mp);
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_vfsstat.f_fsid.val[0] = (int32_t)(uintptr_t)devfs_mp_p;
mp->mnt_vfsstat.f_fsid.val[1] = vfs_typenum(mp);
mp->mnt_flag |= MNT_LOCAL;
DEVFS_LOCK();
error = dev_dup_plane(devfs_mp_p);
DEVFS_UNLOCK();
if (error) {
mp->mnt_data = (qaddr_t)0;
FREE((caddr_t)devfs_mp_p, M_DEVFSMNT);
return (error);
} else
DEVFS_INCR_MOUNTS();
bzero(mp->mnt_vfsstat.f_mntfromname, MAXPATHLEN);
bcopy("devfs",mp->mnt_vfsstat.f_mntfromname, 5);
(void)devfs_statfs(mp, &mp->mnt_vfsstat, ctx);
return 0;
}
static int
devfs_start(__unused struct mount *mp, __unused int flags, __unused vfs_context_t ctx)
{
return 0;
}
static int
devfs_unmount( struct mount *mp, int mntflags, __unused vfs_context_t ctx)
{
struct devfsmount *devfs_mp_p = (struct devfsmount *)mp->mnt_data;
int flags = 0;
int force = 0;
int error;
if (mntflags & MNT_FORCE) {
flags |= FORCECLOSE;
force = 1;
}
error = vflush(mp, NULLVP, flags);
if (error && !force)
return error;
DEVFS_LOCK();
devfs_free_plane(devfs_mp_p);
DEVFS_UNLOCK();
DEVFS_DECR_MOUNTS();
FREE((caddr_t)devfs_mp_p, M_DEVFSMNT);
mp->mnt_data = (qaddr_t)0;
mp->mnt_flag &= ~MNT_LOCAL;
return 0;
}
static int
devfs_root(struct mount *mp, struct vnode **vpp, __unused vfs_context_t ctx)
{
struct devfsmount *devfs_mp_p = (struct devfsmount *)(mp->mnt_data);
int error;
DEVFS_LOCK();
error = devfs_dntovn(devfs_mp_p->plane_root->de_dnp, vpp, NULL);
DEVFS_UNLOCK();
return error;
}
static int
devfs_statfs( struct mount *mp, struct vfsstatfs *sbp, __unused vfs_context_t ctx)
{
struct devfsmount *devfs_mp_p = (struct devfsmount *)mp->mnt_data;
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)(uintptr_t)devfs_mp_p;
sbp->f_fsid.val[1] = vfs_typenum(mp);
return 0;
}
static int
devfs_vfs_getattr(__unused mount_t mp, struct vfs_attr *fsap, __unused vfs_context_t ctx)
{
VFSATTR_RETURN(fsap, f_objcount, devfs_stats.nodes);
VFSATTR_RETURN(fsap, f_maxobjcount, devfs_stats.nodes);
VFSATTR_RETURN(fsap, f_bsize, 512);
VFSATTR_RETURN(fsap, f_iosize, 512);
if (VFSATTR_IS_ACTIVE(fsap, f_blocks) || VFSATTR_IS_ACTIVE(fsap, f_bused)) {
fsap->f_blocks = (devfs_stats.mounts * sizeof(struct devfsmount)
+ devfs_stats.nodes * sizeof(devnode_t)
+ devfs_stats.entries * sizeof(devdirent_t)
+ devfs_stats.stringspace
) / fsap->f_bsize;
fsap->f_bused = fsap->f_blocks;
VFSATTR_SET_SUPPORTED(fsap, f_blocks);
VFSATTR_SET_SUPPORTED(fsap, f_bused);
}
VFSATTR_RETURN(fsap, f_bfree, 0);
VFSATTR_RETURN(fsap, f_bavail, 0);
VFSATTR_RETURN(fsap, f_files, devfs_stats.nodes);
VFSATTR_RETURN(fsap, f_ffree, 0);
VFSATTR_RETURN(fsap, f_fssubtype, 0);
if (VFSATTR_IS_ACTIVE(fsap, f_capabilities)) {
fsap->f_capabilities.capabilities[VOL_CAPABILITIES_FORMAT] =
VOL_CAP_FMT_SYMBOLICLINKS |
VOL_CAP_FMT_HARDLINKS |
VOL_CAP_FMT_NO_ROOT_TIMES |
VOL_CAP_FMT_CASE_SENSITIVE |
VOL_CAP_FMT_CASE_PRESERVING |
VOL_CAP_FMT_FAST_STATFS |
VOL_CAP_FMT_2TB_FILESIZE |
VOL_CAP_FMT_HIDDEN_FILES;
fsap->f_capabilities.capabilities[VOL_CAPABILITIES_INTERFACES] =
VOL_CAP_INT_ATTRLIST ;
fsap->f_capabilities.capabilities[VOL_CAPABILITIES_RESERVED1] = 0;
fsap->f_capabilities.capabilities[VOL_CAPABILITIES_RESERVED2] = 0;
fsap->f_capabilities.valid[VOL_CAPABILITIES_FORMAT] =
VOL_CAP_FMT_PERSISTENTOBJECTIDS |
VOL_CAP_FMT_SYMBOLICLINKS |
VOL_CAP_FMT_HARDLINKS |
VOL_CAP_FMT_JOURNAL |
VOL_CAP_FMT_JOURNAL_ACTIVE |
VOL_CAP_FMT_NO_ROOT_TIMES |
VOL_CAP_FMT_SPARSE_FILES |
VOL_CAP_FMT_ZERO_RUNS |
VOL_CAP_FMT_CASE_SENSITIVE |
VOL_CAP_FMT_CASE_PRESERVING |
VOL_CAP_FMT_FAST_STATFS |
VOL_CAP_FMT_2TB_FILESIZE |
VOL_CAP_FMT_OPENDENYMODES |
VOL_CAP_FMT_HIDDEN_FILES |
VOL_CAP_FMT_PATH_FROM_ID |
VOL_CAP_FMT_NO_VOLUME_SIZES;
fsap->f_capabilities.valid[VOL_CAPABILITIES_INTERFACES] =
VOL_CAP_INT_SEARCHFS |
VOL_CAP_INT_ATTRLIST |
VOL_CAP_INT_NFSEXPORT |
VOL_CAP_INT_READDIRATTR |
VOL_CAP_INT_EXCHANGEDATA |
VOL_CAP_INT_COPYFILE |
VOL_CAP_INT_ALLOCATE |
VOL_CAP_INT_VOL_RENAME |
VOL_CAP_INT_ADVLOCK |
VOL_CAP_INT_FLOCK |
VOL_CAP_INT_EXTENDED_SECURITY |
VOL_CAP_INT_USERACCESS |
VOL_CAP_INT_MANLOCK |
VOL_CAP_INT_EXTENDED_ATTR |
VOL_CAP_INT_NAMEDSTREAMS;
fsap->f_capabilities.valid[VOL_CAPABILITIES_RESERVED1] = 0;
fsap->f_capabilities.valid[VOL_CAPABILITIES_RESERVED2] = 0;
VFSATTR_SET_SUPPORTED(fsap, f_capabilities);
}
if (VFSATTR_IS_ACTIVE(fsap, f_attributes)) {
fsap->f_attributes.validattr.commonattr =
ATTR_CMN_NAME | ATTR_CMN_DEVID | ATTR_CMN_FSID |
ATTR_CMN_OBJTYPE | ATTR_CMN_OBJTAG | ATTR_CMN_OBJID |
ATTR_CMN_PAROBJID |
ATTR_CMN_MODTIME | ATTR_CMN_CHGTIME | ATTR_CMN_ACCTIME |
ATTR_CMN_OWNERID | ATTR_CMN_GRPID | ATTR_CMN_ACCESSMASK |
ATTR_CMN_FLAGS | ATTR_CMN_USERACCESS | ATTR_CMN_FILEID;
fsap->f_attributes.validattr.volattr =
ATTR_VOL_FSTYPE | ATTR_VOL_SIZE | ATTR_VOL_SPACEFREE |
ATTR_VOL_SPACEAVAIL | ATTR_VOL_MINALLOCATION |
ATTR_VOL_OBJCOUNT | ATTR_VOL_MAXOBJCOUNT |
ATTR_VOL_MOUNTPOINT | ATTR_VOL_MOUNTFLAGS |
ATTR_VOL_MOUNTEDDEVICE | ATTR_VOL_CAPABILITIES |
ATTR_VOL_ATTRIBUTES;
fsap->f_attributes.validattr.dirattr =
ATTR_DIR_LINKCOUNT | ATTR_DIR_MOUNTSTATUS;
fsap->f_attributes.validattr.fileattr =
ATTR_FILE_LINKCOUNT | ATTR_FILE_TOTALSIZE |
ATTR_FILE_IOBLOCKSIZE | ATTR_FILE_DEVTYPE |
ATTR_FILE_DATALENGTH;
fsap->f_attributes.validattr.forkattr = 0;
fsap->f_attributes.nativeattr.commonattr =
ATTR_CMN_NAME | ATTR_CMN_DEVID | ATTR_CMN_FSID |
ATTR_CMN_OBJTYPE | ATTR_CMN_OBJTAG | ATTR_CMN_OBJID |
ATTR_CMN_PAROBJID |
ATTR_CMN_MODTIME | ATTR_CMN_CHGTIME | ATTR_CMN_ACCTIME |
ATTR_CMN_OWNERID | ATTR_CMN_GRPID | ATTR_CMN_ACCESSMASK |
ATTR_CMN_FLAGS | ATTR_CMN_USERACCESS | ATTR_CMN_FILEID;
fsap->f_attributes.nativeattr.volattr =
ATTR_VOL_FSTYPE | ATTR_VOL_SIZE | ATTR_VOL_SPACEFREE |
ATTR_VOL_SPACEAVAIL | ATTR_VOL_MINALLOCATION |
ATTR_VOL_OBJCOUNT | ATTR_VOL_MAXOBJCOUNT |
ATTR_VOL_MOUNTPOINT | ATTR_VOL_MOUNTFLAGS |
ATTR_VOL_MOUNTEDDEVICE | ATTR_VOL_CAPABILITIES |
ATTR_VOL_ATTRIBUTES;
fsap->f_attributes.nativeattr.dirattr =
ATTR_DIR_MOUNTSTATUS;
fsap->f_attributes.nativeattr.fileattr =
ATTR_FILE_LINKCOUNT | ATTR_FILE_TOTALSIZE |
ATTR_FILE_IOBLOCKSIZE | ATTR_FILE_DEVTYPE |
ATTR_FILE_DATALENGTH;
fsap->f_attributes.nativeattr.forkattr = 0;
VFSATTR_SET_SUPPORTED(fsap, f_attributes);
}
return 0;
}
static int
devfs_sync(__unused struct mount *mp, __unused int waitfor, __unused vfs_context_t ctx)
{
return (0);
}
static int
devfs_vget(__unused struct mount *mp, __unused ino64_t ino, __unused struct vnode **vpp, __unused vfs_context_t ctx)
{
return ENOTSUP;
}
static int
devfs_fhtovp (__unused struct mount *mp, __unused int fhlen, __unused unsigned char *fhp, __unused struct vnode **vpp, __unused vfs_context_t ctx)
{
return (EINVAL);
}
static int
devfs_vptofh (__unused struct vnode *vp, __unused int *fhlenp, __unused unsigned char *fhp, __unused vfs_context_t ctx)
{
return (EINVAL);
}
static int
devfs_sysctl(__unused int *name, __unused u_int namelen, __unused user_addr_t oldp,
__unused size_t *oldlenp, __unused user_addr_t newp,
__unused size_t newlen, __unused vfs_context_t ctx)
{
return (ENOTSUP);
}
#include <sys/namei.h>
int
devfs_kernel_mount(char * mntname)
{
struct mount *mp;
int error;
struct nameidata nd;
struct vnode * vp;
vfs_context_t ctx = vfs_context_kernel();
struct vfstable *vfsp;
for (vfsp = vfsconf; vfsp; vfsp = vfsp->vfc_next)
if (!strncmp(vfsp->vfc_name, "devfs", sizeof(vfsp->vfc_name)))
break;
if (!vfsp) {
panic("Could not find entry in vfsconf for devfs.\n");
}
NDINIT(&nd, LOOKUP, OP_MOUNT, FOLLOW | LOCKLEAF, UIO_SYSSPACE,
CAST_USER_ADDR_T(mntname), ctx);
if ((error = namei(&nd))) {
printf("devfs_kernel_mount: failed to find directory '%s', %d\n",
mntname, error);
return (error);
}
nameidone(&nd);
vp = nd.ni_vp;
if ((error = VNOP_FSYNC(vp, MNT_WAIT, ctx))) {
printf("devfs_kernel_mount: vnop_fsync failed: %d\n", error);
vnode_put(vp);
return (error);
}
if ((error = buf_invalidateblks(vp, BUF_WRITE_DATA, 0, 0))) {
printf("devfs_kernel_mount: buf_invalidateblks failed: %d\n", error);
vnode_put(vp);
return (error);
}
if (vnode_isdir(vp) == 0) {
printf("devfs_kernel_mount: '%s' is not a directory\n", mntname);
vnode_put(vp);
return (ENOTDIR);
}
if ((vnode_mountedhere(vp))) {
vnode_put(vp);
return (EBUSY);
}
MALLOC_ZONE(mp, struct mount *, sizeof(struct mount),
M_MOUNT, M_WAITOK);
bzero((char *)mp, sizeof(struct mount));
mp->mnt_maxreadcnt = mp->mnt_maxwritecnt = MAXPHYS;
mp->mnt_segreadcnt = mp->mnt_segwritecnt = 32;
mp->mnt_ioflags = 0;
mp->mnt_realrootvp = NULLVP;
mp->mnt_authcache_ttl = CACHED_LOOKUP_RIGHT_TTL;
mount_lock_init(mp);
TAILQ_INIT(&mp->mnt_vnodelist);
TAILQ_INIT(&mp->mnt_workerqueue);
TAILQ_INIT(&mp->mnt_newvnodes);
(void)vfs_busy(mp, LK_NOWAIT);
mp->mnt_op = &devfs_vfsops;
mp->mnt_vtable = vfsp;
mp->mnt_flag = 0;
mp->mnt_flag |= vfsp->vfc_flags & MNT_VISFLAGMASK;
strlcpy(mp->mnt_vfsstat.f_fstypename, vfsp->vfc_name, MFSTYPENAMELEN);
vp->v_mountedhere = mp;
mp->mnt_vnodecovered = vp;
mp->mnt_vfsstat.f_owner = kauth_cred_getuid(kauth_cred_get());
(void) copystr(mntname, mp->mnt_vfsstat.f_mntonname, MAXPATHLEN - 1, 0);
#if CONFIG_MACF
mac_mount_label_init(mp);
mac_mount_label_associate(ctx, mp);
#endif
error = devfs_mount(mp, NULL, USER_ADDR_NULL, ctx);
if (error) {
printf("devfs_kernel_mount: mount %s failed: %d\n", mntname, error);
mp->mnt_vtable->vfc_refcount--;
vfs_unbusy(mp);
mount_lock_destroy(mp);
#if CONFIG_MACF
mac_mount_label_destroy(mp);
#endif
FREE_ZONE(mp, sizeof (struct mount), M_MOUNT);
vnode_put(vp);
return (error);
}
vnode_ref(vp);
vnode_put(vp);
vfs_unbusy(mp);
mount_list_add(mp);
return (0);
}
struct vfsops devfs_vfsops = {
devfs_mount,
devfs_start,
devfs_unmount,
devfs_root,
NULL,
devfs_vfs_getattr,
devfs_sync,
devfs_vget,
devfs_fhtovp,
devfs_vptofh,
devfs_init,
devfs_sysctl,
NULL,
{NULL}
};