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* Remove redundant KC_TRNS and KC_NO fillers in remaining keymaps (#5154)fauxpark2019-02-171-2/+0
* DZ60 Configurator fix and refactor (#3205)noroadsleft2018-06-211-2/+1
* More Configurator Warning Fixes (#2716)MechMerlin2018-04-071-4/+4
* update build script to not delete filesJack Humbert2017-11-171-52/+52
* DZ60 own true HHKB layout after dz60.h fix (#2012)Robert Llewellyn2017-11-171-0/+53
7' href='#n47'>47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190
/******************************************************************************
 * sysctl.c
 * 
 * System management operations. For use by node control stack.
 * 
 * Copyright (c) 2002-2006, K Fraser
 */

#include <xen/config.h>
#include <xen/types.h>
#include <xen/lib.h>
#include <xen/mm.h>
#include <xen/sched.h>
#include <xen/domain.h>
#include <xen/event.h>
#include <xen/domain_page.h>
#include <xen/trace.h>
#include <xen/console.h>
#include <xen/iocap.h>
#include <xen/guest_access.h>
#include <xen/keyhandler.h>
#include <asm/current.h>
#include <public/sysctl.h>

extern long arch_do_sysctl(
    struct xen_sysctl *op, XEN_GUEST_HANDLE(xen_sysctl_t) u_sysctl);

long do_sysctl(XEN_GUEST_HANDLE(xen_sysctl_t) u_sysctl)
{
    long ret = 0;
    struct xen_sysctl curop, *op = &curop;
    static DEFINE_SPINLOCK(sysctl_lock);

    if ( !IS_PRIV(current->domain) )
        return -EPERM;

    if ( copy_from_guest(op, u_sysctl, 1) )
        return -EFAULT;

    if ( op->interface_version != XEN_SYSCTL_INTERFACE_VERSION )
        return -EACCES;

    spin_lock(&sysctl_lock);

    switch ( op->cmd )
    {
    case XEN_SYSCTL_readconsole:
    {
        ret = read_console_ring(
            guest_handle_cast(op->u.readconsole.buffer, char),
            &op->u.readconsole.count,
            op->u.readconsole.clear);
        if ( copy_to_guest(u_sysctl, op, 1) )
            ret = -EFAULT;
    }
    break;

    case XEN_SYSCTL_tbuf_op:
    {
        ret = tb_control(&op->u.tbuf_op);
        if ( copy_to_guest(u_sysctl, op, 1) )
            ret = -EFAULT;
    }
    break;
    
    case XEN_SYSCTL_sched_id:
    {
        op->u.sched_id.sched_id = sched_id();
        if ( copy_to_guest(u_sysctl, op, 1) )
            ret = -EFAULT;
        else
            ret = 0;
    }
    break;

    case XEN_SYSCTL_getdomaininfolist:
    { 
        struct domain *d;
        struct xen_domctl_getdomaininfo info;
        u32 num_domains = 0;

        rcu_read_lock(&domlist_read_lock);

        for_each_domain ( d )
        {
            if ( d->domain_id < op->u.getdomaininfolist.first_domain )
                continue;
            if ( num_domains == op->u.getdomaininfolist.max_domains )
                break;

            getdomaininfo(d, &info);

            if ( copy_to_guest_offset(op->u.getdomaininfolist.buffer,
                                      num_domains, &info, 1) )
            {
                ret = -EFAULT;
                break;
            }
            
            num_domains++;
        }
        
        rcu_read_unlock(&domlist_read_lock);
        
        if ( ret != 0 )
            break;
        
        op->u.getdomaininfolist.num_domains = num_domains;

        if ( copy_to_guest(u_sysctl, op, 1) )
            ret = -EFAULT;
    }
    break;

#ifdef PERF_COUNTERS
    case XEN_SYSCTL_perfc_op:
    {
        ret = perfc_control(&op->u.perfc_op);
        if ( copy_to_guest(u_sysctl, op, 1) )
            ret = -EFAULT;
    }
    break;
#endif

    case XEN_SYSCTL_debug_keys:
    {
        char c;
        uint32_t i;

        for ( i = 0; i < op->u.debug_keys.nr_keys; i++ )
        {
            if ( copy_from_guest_offset(&c, op->u.debug_keys.keys, i, 1) )
                return -EFAULT;
            handle_keypress(c, guest_cpu_user_regs());
        }
    }
    break;

    case XEN_SYSCTL_getcpuinfo:
    {
        uint32_t i, nr_cpus;
        struct xen_sysctl_cpuinfo cpuinfo;
        struct vcpu *v;

        nr_cpus = min_t(uint32_t, op->u.getcpuinfo.max_cpus, NR_CPUS);

        for ( i = 0; i < nr_cpus; i++ )
        {
            /* Assume no holes in idle-vcpu map. */
            if ( (v = idle_vcpu[i]) == NULL )
                break;

            cpuinfo.idletime = v->runstate.time[RUNSTATE_running];
            if ( v->is_running )
                cpuinfo.idletime += NOW() - v->runstate.state_entry_time;

            if ( copy_to_guest_offset(op->u.getcpuinfo.info, i, &cpuinfo, 1) )
            {
                ret = -EFAULT;
                break;
            }
        }

        op->u.getcpuinfo.nr_cpus = i;
        ret = 0;

        if ( copy_to_guest(u_sysctl, op, 1) )
            ret = -EFAULT;
    }
    break;

    default:
        ret = arch_do_sysctl(op, u_sysctl);
        break;
    }

    spin_unlock(&sysctl_lock);

    return ret;
}

/*
 * Local variables:
 * mode: C
 * c-set-style: "BSD"
 * c-basic-offset: 4
 * tab-width: 4
 * indent-tabs-mode: nil
 * End:
 */