#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/fcntl.h>
#include <sys/unistd.h>
#include <sys/malloc.h>
#include <vfs/vfs_support.h>
#include <libkern/OSAtomic.h>
#if CONFIG_MACF
#include <security/mac_framework.h>
#endif
#include "routefs.h"
static int routefs_init(__unused struct vfsconf *vfsp);
static int routefs_mount(struct mount *mp, __unused vnode_t devvp, __unused user_addr_t data, vfs_context_t ctx);
static int routefs_start(__unused struct mount *mp, __unused int flags, __unused vfs_context_t ctx);
static int routefs_unmount( struct mount *mp, int mntflags, __unused vfs_context_t ctx);
static int routefs_root(struct mount *mp, struct vnode **vpp, __unused vfs_context_t ctx);
static int routefs_statfs( struct mount *mp, struct vfsstatfs *sbp, __unused vfs_context_t ctx);
static int routefs_vfs_getattr(__unused mount_t mp, struct vfs_attr *fsap, __unused vfs_context_t ctx);
static int routefs_sync(__unused struct mount *mp, __unused int waitfor, __unused vfs_context_t ctx);
static int routefs_vget(__unused struct mount *mp, __unused ino64_t ino, __unused struct vnode **vpp, __unused vfs_context_t ctx);
static int routefs_fhtovp(__unused struct mount *mp, __unused int fhlen, __unused unsigned char *fhp, __unused struct vnode **vpp, __unused vfs_context_t ctx);
static int routefs_vptofh(__unused struct vnode *vp, __unused int *fhlenp, __unused unsigned char *fhp, __unused vfs_context_t ctx);
static int routefs_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);
static int routefserr_lookup(__unused struct vnop_lookup_args * args);
static int routefserr_setlabel(__unused struct vnop_setlabel_args * args);
LCK_GRP_DECLARE(routefs_lck_grp, "routefs_lock");
LCK_MTX_DECLARE(routefs_mutex, &routefs_lck_grp);;
#define ROUTEFS_LOCK() lck_mtx_lock(&routefs_mutex)
#define ROUTEFS_UNLOCK() lck_mtx_unlock(&routefs_mutex)
static boolean_t _fs_alreadyMounted = FALSE;
static int
routefs_init(__unused struct vfsconf *vfsp)
{
return 0;
}
static int
routefs_mount(struct mount *mp, __unused vnode_t devvp, user_addr_t data, vfs_context_t ctx)
{
struct routefs_mount *routefs_mp_p = NULL;
int error = EINVAL;
struct routefs_args * rargs = (struct routefs_args *)data;
if (mp->mnt_flag & MNT_UPDATE) {
return 0;
}
if ((error = proc_suser(current_proc())) != 0) {
goto out;
}
if (vfs_iskernelmount(mp) == FALSE) {
error = EPERM;
goto out;
}
if (_fs_alreadyMounted == TRUE) {
error = EPERM;
goto out;
}
vfs_setlocklocal(mp);
MALLOC(routefs_mp_p, struct routefs_mount *, sizeof(struct routefs_mount),
M_TEMP, M_WAITOK);
if (routefs_mp_p == NULL) {
return ENOMEM;
}
bzero(routefs_mp_p, sizeof(*routefs_mp_p));
routefs_mp_p->route_mount = mp;
if (rargs->route_rvp == NULLVP) {
error = EACCES;
goto out;
}
strlcpy(routefs_mp_p->route_path, rargs->route_path, MAXPATHLEN);
routefs_mp_p->route_rvp = rargs->route_rvp;
routefs_mp_p->route_vpvid = vnode_vid(rargs->route_rvp);
if (vnode_ref(routefs_mp_p->route_rvp) != 0) {
error = EACCES;
goto out;
}
__IGNORE_WCASTALIGN(mp->mnt_data = (qaddr_t)routefs_mp_p);
mp->mnt_vfsstat.f_fsid.val[0] = (int32_t)VM_KERNEL_ADDRHASH(routefs_mp_p);
mp->mnt_vfsstat.f_fsid.val[1] = vfs_typenum(mp);
mp->mnt_flag |= MNT_LOCAL;
bzero(mp->mnt_vfsstat.f_mntfromname, MAXPATHLEN);
bcopy("routefs", mp->mnt_vfsstat.f_mntfromname, 5);
(void)routefs_statfs(mp, &mp->mnt_vfsstat, ctx);
_fs_alreadyMounted = TRUE;
error = 0;
out:
if (error != 0) {
if (routefs_mp_p != NULL) {
FREE(routefs_mp_p, M_TEMP);
}
}
return error;
}
static int
routefs_start(__unused struct mount *mp, __unused int flags, __unused vfs_context_t ctx)
{
return 0;
}
static int
routefs_unmount( struct mount *mp, int mntflags, __unused vfs_context_t ctx)
{
struct routefs_mount *routefs_mp_p = (struct routefs_mount *)mp->mnt_data;
int flags = 0;
int force = 0;
int error;
if ((error = proc_suser(current_proc())) != 0) {
return error;
}
if (mntflags & MNT_FORCE) {
flags |= FORCECLOSE;
force = 1;
}
if (routefs_mp_p->route_rvp != NULLVP) {
if (vnode_getwithref(routefs_mp_p->route_rvp) == 0) {
vnode_rele(routefs_mp_p->route_rvp);
vnode_put(routefs_mp_p->route_rvp);
routefs_mp_p->route_rvp = NULLVP;
}
}
(void)vflush(mp, NULLVP, flags);
FREE(routefs_mp_p, M_TEMP);
mp->mnt_data = (qaddr_t)0;
mp->mnt_flag &= ~MNT_LOCAL;
_fs_alreadyMounted = FALSE;
return 0;
}
static int
routefs_root(struct mount *mp, struct vnode **vpp, __unused vfs_context_t ctx)
{
struct routefs_mount *routefs_mp_p = (struct routefs_mount *)(mp->mnt_data);
int error = 0;
if (routefs_mp_p->route_rvp == NULLVP) {
ROUTEFS_LOCK();
if (routefs_mp_p->route_rvp == NULLVP) {
ROUTEFS_UNLOCK();
error = EACCES;
goto out;
}
ROUTEFS_UNLOCK();
}
if (vnode_getwithvid(routefs_mp_p->route_rvp, routefs_mp_p->route_vpvid) != 0) {
ROUTEFS_LOCK();
if (vnode_getwithref(routefs_mp_p->route_rvp) == 0) {
vnode_rele(routefs_mp_p->route_rvp);
vnode_put(routefs_mp_p->route_rvp);
routefs_mp_p->route_rvp = NULLVP;
routefs_mp_p->route_vpvid = -1;
error = vnode_lookup(routefs_mp_p->route_path, FREAD | O_DIRECTORY, &routefs_mp_p->route_rvp, ctx);
if (error == 0) {
routefs_mp_p->route_vpvid = vnode_vid(routefs_mp_p->route_rvp);
}
} else {
error = EACCES;
}
ROUTEFS_UNLOCK();
if (error != 0) {
goto out;
}
}
*vpp = routefs_mp_p->route_rvp;
out:
return error;
}
static int
routefs_statfs( struct mount *mp, struct vfsstatfs *sbp, __unused vfs_context_t ctx)
{
struct routefs_mount *routefs_mp_p = (struct routefs_mount *)mp->mnt_data;
sbp->f_flags = 0;
sbp->f_bsize = 512;
sbp->f_iosize = 512;
sbp->f_blocks = (sizeof(struct routefs_mount) + sbp->f_bsize) / sbp->f_bsize;
sbp->f_bfree = 0;
sbp->f_bavail = 0;
sbp->f_files = 0;
sbp->f_ffree = 0;
sbp->f_fsid.val[0] = (int32_t)VM_KERNEL_ADDRHASH(routefs_mp_p);
sbp->f_fsid.val[1] = vfs_typenum(mp);
return 0;
}
static int
routefs_vfs_getattr(__unused mount_t mp, struct vfs_attr *fsap, __unused vfs_context_t ctx)
{
VFSATTR_RETURN(fsap, f_objcount, 1);
VFSATTR_RETURN(fsap, f_maxobjcount, 1);
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 = (sizeof(struct routefs_mount) + fsap->f_bsize) / 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, 0);
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
routefs_sync(__unused struct mount *mp, __unused int waitfor, __unused vfs_context_t ctx)
{
return 0;
}
static int
routefs_vget(__unused struct mount *mp, __unused ino64_t ino, __unused struct vnode **vpp, __unused vfs_context_t ctx)
{
return ENOTSUP;
}
static int
routefs_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
routefs_vptofh(__unused struct vnode *vp, __unused int *fhlenp, __unused unsigned char *fhp, __unused vfs_context_t ctx)
{
return EINVAL;
}
static int
routefs_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>
#define MOBILE_DIR_PATH "/private/var/mobile"
int
routefs_kernel_mount(char * routepath)
{
int error = EINVAL;
vfs_context_t ctx = vfs_context_kernel();
char fsname[] = "routefs";
struct routefs_args args;
char mounthere[] = MOBILE_DIR_PATH;
bzero(&args, sizeof(struct routefs_args));
strlcpy(args.route_path, routepath, MAXPATHLEN);
error = vnode_lookup(args.route_path, FREAD | O_DIRECTORY, &args.route_rvp, ctx);
if (error) {
goto out;
}
if (!vnode_isdir(args.route_rvp)) {
error = EACCES;
goto out;
}
error = kernel_mount(fsname, NULLVP, NULLVP, mounthere, &args, 0, MNT_DONTBROWSE, KERNEL_MOUNT_NOAUTH, ctx);
if (error) {
goto out;
}
out:
if (args.route_rvp != NULLVP) {
(void) vnode_put(args.route_rvp);
}
return error;
}
const struct vfsops routefs_vfsops = {
.vfs_mount = routefs_mount,
.vfs_start = routefs_start,
.vfs_unmount = routefs_unmount,
.vfs_root = routefs_root,
.vfs_getattr = routefs_vfs_getattr,
.vfs_sync = routefs_sync,
.vfs_vget = routefs_vget,
.vfs_fhtovp = routefs_fhtovp,
.vfs_vptofh = routefs_vptofh,
.vfs_init = routefs_init,
.vfs_sysctl = routefs_sysctl,
};
static int
routefserr_lookup(__unused struct vnop_lookup_args * args)
{
return ENOTSUP;
}
static int
routefserr_setlabel(__unused struct vnop_setlabel_args * args)
{
return ENOTSUP;
}
#define VOPFUNC int (*)(void *)
int(**routefs_vnodeop_p)(void *);
static const struct vnodeopv_entry_desc routefs_vnodeop_entries[] = {
{ .opve_op = &vnop_default_desc, .opve_impl = (VOPFUNC)vn_default_error },
{ .opve_op = &vnop_lookup_desc, .opve_impl = (VOPFUNC)routefserr_lookup },
{ .opve_op = &vnop_create_desc, .opve_impl = (VOPFUNC)err_create },
{ .opve_op = &vnop_whiteout_desc, .opve_impl = (VOPFUNC)err_whiteout },
{ .opve_op = &vnop_mknod_desc, .opve_impl = (VOPFUNC)err_mknod },
{ .opve_op = &vnop_open_desc, .opve_impl = (VOPFUNC)err_open },
{ .opve_op = &vnop_close_desc, .opve_impl = (VOPFUNC)err_close },
{ .opve_op = &vnop_getattr_desc, .opve_impl = (VOPFUNC)err_getattr },
{ .opve_op = &vnop_setattr_desc, .opve_impl = (VOPFUNC)err_setattr },
{ .opve_op = &vnop_read_desc, .opve_impl = (VOPFUNC)err_read },
{ .opve_op = &vnop_write_desc, .opve_impl = (VOPFUNC)err_write },
{ .opve_op = &vnop_ioctl_desc, .opve_impl = (VOPFUNC)err_ioctl },
{ .opve_op = &vnop_select_desc, .opve_impl = (VOPFUNC)err_select },
{ .opve_op = &vnop_revoke_desc, .opve_impl = (VOPFUNC)err_revoke },
{ .opve_op = &vnop_mmap_desc, .opve_impl = (VOPFUNC)err_mmap },
{ .opve_op = &vnop_fsync_desc, .opve_impl = (VOPFUNC)nop_fsync },
{ .opve_op = &vnop_remove_desc, .opve_impl = (VOPFUNC)err_remove },
{ .opve_op = &vnop_link_desc, .opve_impl = (VOPFUNC)err_link },
{ .opve_op = &vnop_rename_desc, .opve_impl = (VOPFUNC)err_rename },
{ .opve_op = &vnop_mkdir_desc, .opve_impl = (VOPFUNC)err_mkdir },
{ .opve_op = &vnop_rmdir_desc, .opve_impl = (VOPFUNC)err_rmdir },
{ .opve_op = &vnop_symlink_desc, .opve_impl = (VOPFUNC)err_symlink },
{ .opve_op = &vnop_readdir_desc, .opve_impl = (VOPFUNC)err_readdir },
{ .opve_op = &vnop_readlink_desc, .opve_impl = (VOPFUNC)err_readlink },
{ .opve_op = &vnop_inactive_desc, .opve_impl = (VOPFUNC)err_inactive },
{ .opve_op = &vnop_reclaim_desc, .opve_impl = (VOPFUNC)err_reclaim },
{ .opve_op = &vnop_strategy_desc, .opve_impl = (VOPFUNC)err_strategy },
{ .opve_op = &vnop_pathconf_desc, .opve_impl = (VOPFUNC)err_pathconf },
{ .opve_op = &vnop_advlock_desc, .opve_impl = (VOPFUNC)err_advlock },
{ .opve_op = &vnop_bwrite_desc, .opve_impl = (VOPFUNC)err_bwrite },
{ .opve_op = &vnop_pagein_desc, .opve_impl = (VOPFUNC)err_pagein },
{ .opve_op = &vnop_pageout_desc, .opve_impl = (VOPFUNC)err_pageout },
{ .opve_op = &vnop_copyfile_desc, .opve_impl = (VOPFUNC)err_copyfile },
{ .opve_op = &vnop_blktooff_desc, .opve_impl = (VOPFUNC)err_blktooff },
{ .opve_op = &vnop_offtoblk_desc, .opve_impl = (VOPFUNC)err_offtoblk },
{ .opve_op = &vnop_blockmap_desc, .opve_impl = (VOPFUNC)err_blockmap },
#if CONFIG_MACF
{ .opve_op = &vnop_setlabel_desc, .opve_impl = (VOPFUNC)routefserr_setlabel },
#endif
{ .opve_op = (struct vnodeop_desc*)NULL, .opve_impl = (int (*)(void *))NULL }
};
const struct vnodeopv_desc routefs_vnodeop_opv_desc =
{ .opv_desc_vector_p = &routefs_vnodeop_p, .opv_desc_ops = routefs_vnodeop_entries };