242 lines
7.0 KiB
C
242 lines
7.0 KiB
C
/* The kernel call implemented in this file:
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* m_type: SYS_GETINFO
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*
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* The parameters for this kernel call are:
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* m_lsys_krn_sys_getinfo.request (what info to get)
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* m_lsys_krn_sys_getinfo.val_ptr (where to put it)
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* m_lsys_krn_sys_getinfo.val_len (maximum length expected, optional)
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* m_lsys_krn_sys_getinfo.val_ptr2 (second, optional pointer)
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* m_lsys_krn_sys_getinfo.val_len2_e (second length or process nr)
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*
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* Upon return of the GETWHOAMI request the following parameters are used:
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* m_krn_lsys_sys_getwhoami.endpt (the caller endpoint)
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* m_krn_lsys_sys_getwhoami.privflags (the caller priviledes)
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* m_krn_lsys_sys_getwhoami.name (the caller process name)
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*
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*/
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#include <string.h>
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#include "kernel/system.h"
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#if USE_GETINFO
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#include <minix/u64.h>
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#include <sys/resource.h>
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/*===========================================================================*
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* update_idle_time *
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*===========================================================================*/
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static void update_idle_time(void)
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{
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int i;
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struct proc * idl = proc_addr(IDLE);
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idl->p_cycles = make64(0, 0);
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for (i = 0; i < CONFIG_MAX_CPUS ; i++) {
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idl->p_cycles += get_cpu_var(i, idle_proc).p_cycles;
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}
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}
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/*===========================================================================*
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* do_getinfo *
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*===========================================================================*/
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int do_getinfo(struct proc * caller, message * m_ptr)
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{
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/* Request system information to be copied to caller's address space. This
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* call simply copies entire data structures to the caller.
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*/
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size_t length;
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vir_bytes src_vir;
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int nr_e, nr, r;
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int wipe_rnd_bin = -1;
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struct proc *p;
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struct rusage r_usage;
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/* Set source address and length based on request type. */
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switch (m_ptr->m_lsys_krn_sys_getinfo.request) {
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case GET_MACHINE: {
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length = sizeof(struct machine);
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src_vir = (vir_bytes) &machine;
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break;
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}
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case GET_KINFO: {
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length = sizeof(struct kinfo);
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src_vir = (vir_bytes) &kinfo;
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break;
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}
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case GET_LOADINFO: {
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length = sizeof(struct loadinfo);
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src_vir = (vir_bytes) &kloadinfo;
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break;
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}
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case GET_CPUINFO: {
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length = sizeof(cpu_info);
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src_vir = (vir_bytes) &cpu_info;
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break;
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}
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case GET_HZ: {
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length = sizeof(system_hz);
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src_vir = (vir_bytes) &system_hz;
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break;
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}
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case GET_IMAGE: {
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length = sizeof(struct boot_image) * NR_BOOT_PROCS;
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src_vir = (vir_bytes) image;
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break;
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}
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case GET_IRQHOOKS: {
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length = sizeof(struct irq_hook) * NR_IRQ_HOOKS;
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src_vir = (vir_bytes) irq_hooks;
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break;
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}
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case GET_PROCTAB: {
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update_idle_time();
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length = sizeof(struct proc) * (NR_PROCS + NR_TASKS);
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src_vir = (vir_bytes) proc;
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break;
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}
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case GET_PRIVTAB: {
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length = sizeof(struct priv) * (NR_SYS_PROCS);
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src_vir = (vir_bytes) priv;
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break;
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}
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case GET_PROC: {
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nr_e = (m_ptr->m_lsys_krn_sys_getinfo.val_len2_e == SELF) ?
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caller->p_endpoint : m_ptr->m_lsys_krn_sys_getinfo.val_len2_e;
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if(!isokendpt(nr_e, &nr)) return EINVAL; /* validate request */
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length = sizeof(struct proc);
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src_vir = (vir_bytes) proc_addr(nr);
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break;
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}
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case GET_PRIV: {
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nr_e = (m_ptr->m_lsys_krn_sys_getinfo.val_len2_e == SELF) ?
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caller->p_endpoint : m_ptr->m_lsys_krn_sys_getinfo.val_len2_e;
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if(!isokendpt(nr_e, &nr)) return EINVAL; /* validate request */
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length = sizeof(struct priv);
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src_vir = (vir_bytes) priv_addr(nr_to_id(nr));
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break;
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}
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case GET_REGS: {
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nr_e = (m_ptr->m_lsys_krn_sys_getinfo.val_len2_e == SELF) ?
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caller->p_endpoint : m_ptr->m_lsys_krn_sys_getinfo.val_len2_e;
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if(!isokendpt(nr_e, &nr)) return EINVAL; /* validate request */
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p = proc_addr(nr);
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length = sizeof(p->p_reg);
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src_vir = (vir_bytes) &p->p_reg;
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break;
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}
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case GET_WHOAMI: {
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int len;
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m_ptr->m_krn_lsys_sys_getwhoami.endpt = caller->p_endpoint;
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len = MIN(sizeof(m_ptr->m_krn_lsys_sys_getwhoami.name),
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sizeof(caller->p_name))-1;
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strncpy(m_ptr->m_krn_lsys_sys_getwhoami.name, caller->p_name, len);
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m_ptr->m_krn_lsys_sys_getwhoami.name[len] = '\0';
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m_ptr->m_krn_lsys_sys_getwhoami.privflags = priv(caller)->s_flags;
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return OK;
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}
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case GET_MONPARAMS: {
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src_vir = (vir_bytes) kinfo.param_buf;
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length = sizeof(kinfo.param_buf);
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break;
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}
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case GET_RANDOMNESS: {
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static struct k_randomness copy; /* copy to keep counters */
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int i;
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copy = krandom;
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for (i= 0; i<RANDOM_SOURCES; i++) {
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krandom.bin[i].r_size = 0; /* invalidate random data */
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krandom.bin[i].r_next = 0;
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}
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length = sizeof(copy);
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src_vir = (vir_bytes) ©
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break;
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}
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case GET_RANDOMNESS_BIN: {
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int bin = m_ptr->m_lsys_krn_sys_getinfo.val_len2_e;
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if(bin < 0 || bin >= RANDOM_SOURCES) {
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printf("SYSTEM: GET_RANDOMNESS_BIN: %d out of range\n", bin);
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return EINVAL;
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}
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if(krandom.bin[bin].r_size < RANDOM_ELEMENTS)
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return ENOENT;
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length = sizeof(krandom.bin[bin]);
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src_vir = (vir_bytes) &krandom.bin[bin];
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wipe_rnd_bin = bin;
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break;
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}
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case GET_IRQACTIDS: {
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length = sizeof(irq_actids);
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src_vir = (vir_bytes) irq_actids;
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break;
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}
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case GET_IDLETSC: {
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struct proc * idl;
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update_idle_time();
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idl = proc_addr(IDLE);
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length = sizeof(idl->p_cycles);
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src_vir = (vir_bytes) &idl->p_cycles;
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break;
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}
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case GET_RUSAGE: {
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struct proc *target = NULL;
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int target_slot = 0;
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u64_t usec;
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nr_e = (m_ptr->m_lsys_krn_sys_getinfo.val_len2_e == SELF) ?
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caller->p_endpoint : m_ptr->m_lsys_krn_sys_getinfo.val_len2_e;
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if (!isokendpt(nr_e, &target_slot))
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return EINVAL;
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target = proc_addr(target_slot);
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if (isemptyp(target))
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return EINVAL;
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length = sizeof(r_usage);
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memset(&r_usage, 0, sizeof(r_usage));
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usec = target->p_user_time * 1000000 / system_hz;
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r_usage.ru_utime.tv_sec = usec / 1000000;
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r_usage.ru_utime.tv_usec = usec % 1000000;
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usec = target->p_sys_time * 1000000 / system_hz;
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r_usage.ru_stime.tv_sec = usec / 1000000;
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r_usage.ru_stime.tv_usec = usec % 1000000;
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r_usage.ru_nsignals = target->p_signal_received;
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src_vir = (vir_bytes) &r_usage;
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break;
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}
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default:
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printf("do_getinfo: invalid request %d\n",
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m_ptr->m_lsys_krn_sys_getinfo.request);
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return(EINVAL);
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}
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/* Try to make the actual copy for the requested data. */
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if (m_ptr->m_lsys_krn_sys_getinfo.val_len > 0 &&
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length > m_ptr->m_lsys_krn_sys_getinfo.val_len)
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return (E2BIG);
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r = data_copy_vmcheck(caller, KERNEL, src_vir, caller->p_endpoint,
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m_ptr->m_lsys_krn_sys_getinfo.val_ptr, length);
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if(r != OK) return r;
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if(wipe_rnd_bin >= 0 && wipe_rnd_bin < RANDOM_SOURCES) {
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krandom.bin[wipe_rnd_bin].r_size = 0;
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krandom.bin[wipe_rnd_bin].r_next = 0;
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}
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return(OK);
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}
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#endif /* USE_GETINFO */
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