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/* $OpenBSD: vmd.h,v 1.61 2017/08/31 06:23:37 mlarkin Exp $ */
/*
* Copyright (c) 2015 Mike Larkin <mlarkin@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/types.h>
#include <sys/queue.h>
#include <sys/socket.h>
#include <machine/vmmvar.h>
#include <net/if.h>
#include <netinet/in.h>
#include <netinet/if_ether.h>
#include <limits.h>
#include <stdio.h>
#include <pthread.h>
#include "proc.h"
#ifndef VMD_H
#define VMD_H
#define VMD_USER "_vmd"
#define VMD_CONF "/etc/vm.conf"
#define SOCKET_NAME "/var/run/vmd.sock"
#define VMM_NODE "/dev/vmm"
#define VM_DEFAULT_BIOS "/etc/firmware/vmm-bios"
#define VM_DEFAULT_KERNEL "/bsd"
#define VM_DEFAULT_DEVICE "hd0a"
#define VM_BOOT_CONF "/etc/boot.conf"
#define VM_NAME_MAX 64
#define VM_TTYNAME_MAX 16
#define MAX_TAP 256
#define NR_BACKLOG 5
#define VMD_SWITCH_TYPE "bridge"
#define VM_DEFAULT_MEMORY 512
/* vmd -> vmctl error codes */
#define VMD_BIOS_MISSING 1001
#define VMD_DISK_MISSING 1002
#define VMD_DISK_INVALID 1003
/* 100.64.0.0/10 from rfc6598 (IPv4 Prefix for Shared Address Space) */
#define VMD_DHCP_PREFIX "100.64.0.0/10"
#ifdef VMD_DEBUG
#define dprintf(x...) do { log_debug(x); } while(0)
#else
#define dprintf(x...)
#endif /* VMD_DEBUG */
enum imsg_type {
IMSG_VMDOP_START_VM_REQUEST = IMSG_PROC_MAX,
IMSG_VMDOP_START_VM_DISK,
IMSG_VMDOP_START_VM_IF,
IMSG_VMDOP_START_VM_END,
IMSG_VMDOP_START_VM_RESPONSE,
IMSG_VMDOP_PAUSE_VM,
IMSG_VMDOP_PAUSE_VM_RESPONSE,
IMSG_VMDOP_UNPAUSE_VM,
IMSG_VMDOP_UNPAUSE_VM_RESPONSE,
IMSG_VMDOP_SEND_VM_REQUEST,
IMSG_VMDOP_SEND_VM_RESPONSE,
IMSG_VMDOP_RECEIVE_VM_REQUEST,
IMSG_VMDOP_RECEIVE_VM_RESPONSE,
IMSG_VMDOP_RECEIVE_VM_END,
IMSG_VMDOP_TERMINATE_VM_REQUEST,
IMSG_VMDOP_TERMINATE_VM_RESPONSE,
IMSG_VMDOP_TERMINATE_VM_EVENT,
IMSG_VMDOP_GET_INFO_VM_REQUEST,
IMSG_VMDOP_GET_INFO_VM_DATA,
IMSG_VMDOP_GET_INFO_VM_END_DATA,
IMSG_VMDOP_LOAD,
IMSG_VMDOP_RELOAD,
IMSG_VMDOP_PRIV_IFDESCR,
IMSG_VMDOP_PRIV_IFADD,
IMSG_VMDOP_PRIV_IFCREATE,
IMSG_VMDOP_PRIV_IFUP,
IMSG_VMDOP_PRIV_IFDOWN,
IMSG_VMDOP_PRIV_IFGROUP,
IMSG_VMDOP_PRIV_IFADDR,
IMSG_VMDOP_PRIV_IFRDOMAIN,
IMSG_VMDOP_VM_SHUTDOWN,
IMSG_VMDOP_VM_REBOOT,
IMSG_VMDOP_CONFIG
};
struct vmop_result {
int vmr_result;
uint32_t vmr_id;
pid_t vmr_pid;
char vmr_ttyname[VM_TTYNAME_MAX];
};
struct vmop_info_result {
struct vm_info_result vir_info;
char vir_ttyname[VM_TTYNAME_MAX];
uid_t vir_uid;
int64_t vir_gid;
};
struct vmop_id {
uint32_t vid_id;
char vid_name[VMM_MAX_NAME_LEN];
uid_t vid_uid;
};
struct vmop_ifreq {
uint32_t vfr_id;
char vfr_name[IF_NAMESIZE];
char vfr_value[VM_NAME_MAX];
struct ifaliasreq vfr_ifra;
};
struct vmop_create_params {
struct vm_create_params vmc_params;
unsigned int vmc_flags;
#define VMOP_CREATE_KERNEL 0x01
#define VMOP_CREATE_MEMORY 0x02
#define VMOP_CREATE_NETWORK 0x04
#define VMOP_CREATE_DISK 0x08
/* userland-only part of the create params */
unsigned int vmc_ifflags[VMM_MAX_NICS_PER_VM];
#define VMIFF_UP 0x01
#define VMIFF_LOCKED 0x02
#define VMIFF_LOCAL 0x04
#define VMIFF_RDOMAIN 0x08
#define VMIFF_OPTMASK (VMIFF_LOCKED|VMIFF_LOCAL|VMIFF_RDOMAIN)
char vmc_ifnames[VMM_MAX_NICS_PER_VM][IF_NAMESIZE];
char vmc_ifswitch[VMM_MAX_NICS_PER_VM][VM_NAME_MAX];
char vmc_ifgroup[VMM_MAX_NICS_PER_VM][IF_NAMESIZE];
unsigned int vmc_ifrdomain[VMM_MAX_NICS_PER_VM];
uid_t vmc_uid;
int64_t vmc_gid;
};
struct vm_dump_header_cpuid {
unsigned long code, leaf;
unsigned int a, b, c, d;
};
#define VM_DUMP_HEADER_CPUID_COUNT 5
struct vm_dump_header {
uint8_t vmh_signature[12];
#define VM_DUMP_SIGNATURE VMM_HV_SIGNATURE
uint8_t vmh_pad[3];
uint8_t vmh_version;
#define VM_DUMP_VERSION 2
struct vm_dump_header_cpuid
vmh_cpuids[VM_DUMP_HEADER_CPUID_COUNT];
} __packed;
struct vmboot_params {
int vbp_fd;
off_t vbp_partoff;
char vbp_device[PATH_MAX];
char vbp_image[PATH_MAX];
uint32_t vbp_bootdev;
uint32_t vbp_howto;
char *vbp_arg;
};
struct vmd_if {
char *vif_name;
char *vif_switch;
char *vif_group;
int vif_fd;
unsigned int vif_rdomain;
unsigned int vif_flags;
TAILQ_ENTRY(vmd_if) vif_entry;
};
TAILQ_HEAD(viflist, vmd_if);
struct vmd_switch {
uint32_t sw_id;
char *sw_name;
char sw_ifname[IF_NAMESIZE];
char *sw_group;
unsigned int sw_rdomain;
unsigned int sw_flags;
struct viflist sw_ifs;
int sw_running;
TAILQ_ENTRY(vmd_switch) sw_entry;
};
TAILQ_HEAD(switchlist, vmd_switch);
struct vmd_vm {
struct vmop_create_params vm_params;
pid_t vm_pid;
uint32_t vm_vmid;
int vm_kernel;
int vm_disks[VMM_MAX_DISKS_PER_VM];
struct vmd_if vm_ifs[VMM_MAX_NICS_PER_VM];
char *vm_ttyname;
int vm_tty;
uint32_t vm_peerid;
/* When set, VM is running now (PROC_PARENT only) */
int vm_running;
/* When set, VM is not started by default (PROC_PARENT only) */
int vm_disabled;
/* When set, VM was defined in a config file */
int vm_from_config;
struct imsgev vm_iev;
int vm_shutdown;
uid_t vm_uid;
int vm_received;
int vm_paused;
int vm_receive_fd;
TAILQ_ENTRY(vmd_vm) vm_entry;
};
TAILQ_HEAD(vmlist, vmd_vm);
struct address {
struct sockaddr_storage ss;
int prefixlen;
TAILQ_ENTRY(address) entry;
};
TAILQ_HEAD(addresslist, address);
struct vmd_config {
struct address cfg_localprefix;
};
struct vmd {
struct privsep vmd_ps;
const char *vmd_conffile;
/* global configuration that is sent to the children */
struct vmd_config vmd_cfg;
int vmd_debug;
int vmd_verbose;
int vmd_noaction;
uint32_t vmd_nvm;
struct vmlist *vmd_vms;
uint32_t vmd_nswitches;
struct switchlist *vmd_switches;
int vmd_fd;
int vmd_ptmfd;
};
static inline struct sockaddr_in *
ss2sin(struct sockaddr_storage *ss)
{
return ((struct sockaddr_in *)ss);
}
static inline struct sockaddr_in6 *
ss2sin6(struct sockaddr_storage *ss)
{
return ((struct sockaddr_in6 *)ss);
}
struct packet_ctx {
uint8_t pc_htype;
uint8_t pc_hlen;
uint8_t pc_smac[ETHER_ADDR_LEN];
uint8_t pc_dmac[ETHER_ADDR_LEN];
struct sockaddr_storage pc_src;
struct sockaddr_storage pc_dst;
};
/* packet.c */
ssize_t assemble_hw_header(unsigned char *, size_t, size_t,
struct packet_ctx *, unsigned int);
ssize_t assemble_udp_ip_header(unsigned char *, size_t, size_t,
struct packet_ctx *pc, unsigned char *, size_t);
ssize_t decode_hw_header(unsigned char *, size_t, size_t, struct packet_ctx *,
unsigned int);
ssize_t decode_udp_ip_header(unsigned char *, size_t, size_t,
struct packet_ctx *);
/* vmd.c */
int vmd_reload(unsigned int, const char *);
struct vmd_vm *vm_getbyid(uint32_t);
struct vmd_vm *vm_getbyvmid(uint32_t);
uint32_t vm_id2vmid(uint32_t, struct vmd_vm *);
uint32_t vm_vmid2id(uint32_t, struct vmd_vm *);
struct vmd_vm *vm_getbyname(const char *);
struct vmd_vm *vm_getbypid(pid_t);
void vm_stop(struct vmd_vm *, int);
void vm_remove(struct vmd_vm *);
int vm_register(struct privsep *, struct vmop_create_params *,
struct vmd_vm **, uint32_t, uid_t);
int vm_checkperm(struct vmd_vm *, uid_t);
int vm_opentty(struct vmd_vm *);
void vm_closetty(struct vmd_vm *);
void switch_remove(struct vmd_switch *);
struct vmd_switch *switch_getbyname(const char *);
char *get_string(uint8_t *, size_t);
uint32_t prefixlen2mask(uint8_t);
/* priv.c */
void priv(struct privsep *, struct privsep_proc *);
int priv_getiftype(char *, char *, unsigned int *);
int priv_findname(const char *, const char **);
int priv_validgroup(const char *);
int vm_priv_ifconfig(struct privsep *, struct vmd_vm *);
int vm_priv_brconfig(struct privsep *, struct vmd_switch *);
uint32_t vm_priv_addr(struct address *, uint32_t, int, int);
/* vmm.c */
void vmm(struct privsep *, struct privsep_proc *);
void vmm_shutdown(void);
int write_mem(paddr_t, const void *buf, size_t);
int read_mem(paddr_t, void *buf, size_t);
int opentap(char *);
int fd_hasdata(int);
void mutex_lock(pthread_mutex_t *);
void mutex_unlock(pthread_mutex_t *);
int vmm_pipe(struct vmd_vm *, int, void (*)(int, short, void *));
/* vm.c */
int start_vm(struct vmd_vm *, int);
int receive_vm(struct vmd_vm *, int, int);
__dead void vm_shutdown(unsigned int);
/* control.c */
int config_init(struct vmd *);
void config_purge(struct vmd *, unsigned int);
int config_setconfig(struct vmd *);
int config_getconfig(struct vmd *, struct imsg *);
int config_setreset(struct vmd *, unsigned int);
int config_getreset(struct vmd *, struct imsg *);
int config_setvm(struct privsep *, struct vmd_vm *, uint32_t, uid_t);
int config_getvm(struct privsep *, struct imsg *);
int config_getdisk(struct privsep *, struct imsg *);
int config_getif(struct privsep *, struct imsg *);
/* vmboot.c */
FILE *vmboot_open(int, int, struct vmboot_params *);
void vmboot_close(FILE *, struct vmboot_params *);
/* parse.y */
int parse_config(const char *);
int cmdline_symset(char *);
int host(const char *, struct address *);
#endif /* VMD_H */
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