* latch curr/currd once at start * drop redundant "ret = 0" and braces * use "copyback = 1" when appropriate * move break statements inside case-specific braced scopes * don't bother check for NULL before calling xfree() * eliminate trailing whitespace * Xen style corrections
Signed-off-by: Andrew Cooper <andrew.coop...@citrix.com> CC: Keir Fraser <k...@xen.org> CC: Jan Beulich <jbeul...@suse.com> --- xen/arch/x86/domctl.c | 276 ++++++++++++++++++++----------------------------- 1 file changed, 113 insertions(+), 163 deletions(-) diff --git a/xen/arch/x86/domctl.c b/xen/arch/x86/domctl.c index 32d3fcd..bcbdf95 100644 --- a/xen/arch/x86/domctl.c +++ b/xen/arch/x86/domctl.c @@ -1,6 +1,6 @@ /****************************************************************************** * Arch-specific domctl.c - * + * * Copyright (c) 2002-2006, K A Fraser */ @@ -39,7 +39,7 @@ static int gdbsx_guest_mem_io( domid_t domid, struct xen_domctl_gdbsx_memio *iop) -{ +{ ulong l_uva = (ulong)iop->uva; iop->remain = dbg_rw_mem( (dbgva_t)iop->gva, (dbgbyte_t *)l_uva, iop->len, domid, @@ -53,6 +53,8 @@ long arch_do_domctl( struct xen_domctl *domctl, struct domain *d, XEN_GUEST_HANDLE_PARAM(xen_domctl_t) u_domctl) { + struct vcpu *curr = current; + struct domain *currd = curr->domain; long ret = 0; bool_t copyback = 0; unsigned long i; @@ -61,15 +63,13 @@ long arch_do_domctl( { case XEN_DOMCTL_shadow_op: - { ret = paging_domctl(d, &domctl->u.shadow_op, guest_handle_cast(u_domctl, void), 0); if ( ret == -ERESTART ) return hypercall_create_continuation(__HYPERVISOR_arch_1, "h", u_domctl); copyback = 1; - } - break; + break; case XEN_DOMCTL_ioport_permission: { @@ -79,8 +79,7 @@ long arch_do_domctl( if ( (fp + np) <= fp || (fp + np) > MAX_IOPORTS ) ret = -EINVAL; - else if ( !ioports_access_permitted(current->domain, - fp, fp + np - 1) || + else if ( !ioports_access_permitted(currd, fp, fp + np - 1) || xsm_ioport_permission(XSM_HOOK, d, fp, fp + np - 1, allow) ) ret = -EPERM; else if ( allow ) @@ -89,8 +88,8 @@ long arch_do_domctl( ret = ioports_deny_access(d, fp, fp + np - 1); if ( !ret ) memory_type_changed(d); + break; } - break; case XEN_DOMCTL_getpageframeinfo: { @@ -127,16 +126,16 @@ long arch_do_domctl( break; } } - + put_page(page); } copyback = 1; + break; } - break; case XEN_DOMCTL_getpageframeinfo3: - if (!has_32bit_shinfo(current->domain)) + if ( !has_32bit_shinfo(currd) ) { unsigned int n, j; unsigned int num = domctl->u.getpageframeinfo3.num; @@ -150,7 +149,7 @@ long arch_do_domctl( break; } - page = alloc_domheap_page(current->domain, MEMF_no_owner); + page = alloc_domheap_page(currd, MEMF_no_owner); if ( !page ) { ret = -ENOMEM; @@ -251,7 +250,7 @@ long arch_do_domctl( ret = -ENOMEM; break; } - + ret = 0; for ( n = 0; n < num; ) { @@ -266,9 +265,9 @@ long arch_do_domctl( ret = -EFAULT; break; } - + for ( j = 0; j < k; j++ ) - { + { struct page_info *page; unsigned long gfn = arr32[j]; @@ -320,8 +319,8 @@ long arch_do_domctl( } free_xenheap_page(arr32); + break; } - break; case XEN_DOMCTL_getmemlist: { @@ -329,7 +328,8 @@ long arch_do_domctl( uint64_t mfn; struct page_info *page; - if ( unlikely(d->is_dying) ) { + if ( unlikely(d->is_dying) ) + { ret = -EINVAL; break; } @@ -346,7 +346,7 @@ long arch_do_domctl( * rather than trying to fix it we restrict it for the time being. */ if ( /* No nested locks inside copy_to_guest_offset(). */ - paging_mode_external(current->domain) || + paging_mode_external(currd) || /* Arbitrary limit capping processing time. */ max_pfns > GB(4) / PAGE_SIZE ) { @@ -375,8 +375,8 @@ long arch_do_domctl( domctl->u.getmemlist.num_pfns = i; copyback = 1; + break; } - break; case XEN_DOMCTL_hypercall_init: { @@ -403,15 +403,15 @@ long arch_do_domctl( unmap_domain_page(hypercall_page); put_page_and_type(page); + break; } - break; case XEN_DOMCTL_sethvmcontext: - { + { struct hvm_domain_context c = { .size = domctl->u.hvmcontext.size }; ret = -EINVAL; - if ( !is_hvm_domain(d) ) + if ( !is_hvm_domain(d) ) goto sethvmcontext_out; ret = -ENOMEM; @@ -419,7 +419,7 @@ long arch_do_domctl( goto sethvmcontext_out; ret = -EFAULT; - if ( copy_from_guest(c.data, domctl->u.hvmcontext.buffer, c.size) != 0) + if ( copy_from_guest(c.data, domctl->u.hvmcontext.buffer, c.size) != 0 ) goto sethvmcontext_out; domain_pause(d); @@ -427,17 +427,16 @@ long arch_do_domctl( domain_unpause(d); sethvmcontext_out: - if ( c.data != NULL ) - xfree(c.data); + xfree(c.data); + break; } - break; case XEN_DOMCTL_gethvmcontext: - { + { struct hvm_domain_context c = { 0 }; ret = -EINVAL; - if ( !is_hvm_domain(d) ) + if ( !is_hvm_domain(d) ) goto gethvmcontext_out; c.size = hvm_save_size(d); @@ -447,12 +446,12 @@ long arch_do_domctl( /* Client is querying for the correct buffer size */ domctl->u.hvmcontext.size = c.size; ret = 0; - goto gethvmcontext_out; + goto gethvmcontext_out; } /* Check that the client has a big enough buffer */ ret = -ENOSPC; - if ( domctl->u.hvmcontext.size < c.size ) + if ( domctl->u.hvmcontext.size < c.size ) goto gethvmcontext_out; /* Allocate our own marshalling buffer */ @@ -470,16 +469,13 @@ long arch_do_domctl( gethvmcontext_out: copyback = 1; - - if ( c.data != NULL ) - xfree(c.data); + xfree(c.data); + break; } - break; case XEN_DOMCTL_gethvmcontext_partial: - { ret = -EINVAL; - if ( !is_hvm_domain(d) ) + if ( !is_hvm_domain(d) ) break; domain_pause(d); @@ -487,12 +483,9 @@ long arch_do_domctl( domctl->u.hvmcontext_partial.instance, domctl->u.hvmcontext_partial.buffer); domain_unpause(d); - } - break; - + break; case XEN_DOMCTL_set_address_size: - { switch ( domctl->u.address_size.size ) { case 32: @@ -505,39 +498,25 @@ long arch_do_domctl( ret = (domctl->u.address_size.size == BITS_PER_LONG) ? 0 : -EINVAL; break; } - } - break; + break; case XEN_DOMCTL_get_address_size: - { domctl->u.address_size.size = is_pv_32on64_domain(d) ? 32 : BITS_PER_LONG; - - ret = 0; copyback = 1; - } - break; + break; case XEN_DOMCTL_set_machine_address_size: - { - ret = -EBUSY; if ( d->tot_pages > 0 ) - break; - - d->arch.physaddr_bitsize = domctl->u.address_size.size; - - ret = 0; - } - break; + ret = -EBUSY; + else + d->arch.physaddr_bitsize = domctl->u.address_size.size; + break; case XEN_DOMCTL_get_machine_address_size: - { domctl->u.address_size.size = d->arch.physaddr_bitsize; - - ret = 0; copyback = 1; - } - break; + break; case XEN_DOMCTL_sendtrigger: { @@ -551,40 +530,34 @@ long arch_do_domctl( switch ( domctl->u.sendtrigger.trigger ) { case XEN_DOMCTL_SENDTRIGGER_NMI: - { ret = 0; if ( !test_and_set_bool(v->nmi_pending) ) vcpu_kick(v); - } - break; + break; case XEN_DOMCTL_SENDTRIGGER_POWER: - { ret = -EINVAL; - if ( is_hvm_domain(d) ) + if ( is_hvm_domain(d) ) { ret = 0; hvm_acpi_power_button(d); } - } - break; + break; case XEN_DOMCTL_SENDTRIGGER_SLEEP: - { ret = -EINVAL; - if ( is_hvm_domain(d) ) + if ( is_hvm_domain(d) ) { ret = 0; hvm_acpi_sleep_button(d); } - } - break; + break; default: ret = -ENOSYS; } + break; } - break; case XEN_DOMCTL_bind_pt_irq: { @@ -601,7 +574,7 @@ long arch_do_domctl( irq = domain_pirq_to_irq(d, bind->machine_irq); ret = -EPERM; - if ( irq <= 0 || !irq_access_permitted(current->domain, irq) ) + if ( irq <= 0 || !irq_access_permitted(currd, irq) ) break; ret = -ESRCH; @@ -614,8 +587,8 @@ long arch_do_domctl( if ( ret < 0 ) printk(XENLOG_G_ERR "pt_irq_create_bind failed (%ld) for dom%d\n", ret, d->domain_id); + break; } - break; case XEN_DOMCTL_unbind_pt_irq: { @@ -623,7 +596,7 @@ long arch_do_domctl( int irq = domain_pirq_to_irq(d, bind->machine_irq); ret = -EPERM; - if ( irq <= 0 || !irq_access_permitted(current->domain, irq) ) + if ( irq <= 0 || !irq_access_permitted(currd, irq) ) break; ret = xsm_unbind_pt_irq(XSM_HOOK, d, bind); @@ -639,8 +612,8 @@ long arch_do_domctl( if ( ret < 0 ) printk(XENLOG_G_ERR "pt_irq_destroy_bind failed (%ld) for dom%d\n", ret, d->domain_id); + break; } - break; case XEN_DOMCTL_ioport_mapping: { @@ -663,7 +636,7 @@ long arch_do_domctl( } ret = -EPERM; - if ( !ioports_access_permitted(current->domain, fmp, fmp + np - 1) ) + if ( !ioports_access_permitted(currd, fmp, fmp + np - 1) ) break; ret = xsm_ioport_mapping(XSM_HOOK, d, fmp, fmp + np - 1, add); @@ -719,33 +692,29 @@ long arch_do_domctl( break; } ret = ioports_deny_access(d, fmp, fmp + np - 1); - if ( ret && is_hardware_domain(current->domain) ) + if ( ret && is_hardware_domain(currd) ) printk(XENLOG_ERR "ioport_map: error %ld denying dom%d access to [%x,%x]\n", ret, d->domain_id, fmp, fmp + np - 1); } if ( !ret ) memory_type_changed(d); + break; } - break; case XEN_DOMCTL_pin_mem_cacheattr: - { ret = hvm_set_mem_pinned_cacheattr( d, domctl->u.pin_mem_cacheattr.start, domctl->u.pin_mem_cacheattr.end, domctl->u.pin_mem_cacheattr.type); - } - break; + break; case XEN_DOMCTL_set_ext_vcpucontext: case XEN_DOMCTL_get_ext_vcpucontext: { - struct xen_domctl_ext_vcpucontext *evc; + struct xen_domctl_ext_vcpucontext *evc = &domctl->u.ext_vcpucontext; struct vcpu *v; - evc = &domctl->u.ext_vcpucontext; - ret = -ESRCH; if ( (evc->vcpu >= d->max_vcpus) || ((v = d->vcpu[evc->vcpu]) == NULL) ) @@ -753,7 +722,7 @@ long arch_do_domctl( if ( domctl->cmd == XEN_DOMCTL_get_ext_vcpucontext ) { - if ( v == current ) /* no vcpu_pause() */ + if ( v == curr ) /* no vcpu_pause() */ break; evc->size = sizeof(*evc); @@ -794,7 +763,7 @@ long arch_do_domctl( } else { - if ( d == current->domain ) /* no domain_pause() */ + if ( d == currd ) /* no domain_pause() */ break; ret = -EINVAL; if ( evc->size < offsetof(typeof(*evc), vmce) ) @@ -848,8 +817,8 @@ long arch_do_domctl( domain_unpause(d); } + break; } - break; case XEN_DOMCTL_set_cpuid: { @@ -872,60 +841,50 @@ long arch_do_domctl( (cpuid->input[1] == ctl->input[1])) ) break; } - + if ( i < MAX_CPUID_INPUT ) *cpuid = *ctl; else if ( unused ) *unused = *ctl; else ret = -ENOENT; + break; } - break; case XEN_DOMCTL_gettscinfo: - { - xen_guest_tsc_info_t info; - - ret = -EINVAL; - if ( d == current->domain ) /* no domain_pause() */ - break; - - domain_pause(d); - tsc_get_info(d, &info.tsc_mode, - &info.elapsed_nsec, - &info.gtsc_khz, - &info.incarnation); - if ( copy_to_guest(domctl->u.tsc_info.out_info, &info, 1) ) - ret = -EFAULT; + if ( d == currd ) /* no domain_pause() */ + ret = -EINVAL; else - ret = 0; - domain_unpause(d); - } - break; + { + xen_guest_tsc_info_t info; + + domain_pause(d); + tsc_get_info(d, &info.tsc_mode, + &info.elapsed_nsec, + &info.gtsc_khz, + &info.incarnation); + domain_unpause(d); + copyback = 1; + } + break; case XEN_DOMCTL_settscinfo: - { - ret = -EINVAL; - if ( d == current->domain ) /* no domain_pause() */ - break; - - domain_pause(d); - tsc_set_info(d, domctl->u.tsc_info.info.tsc_mode, - domctl->u.tsc_info.info.elapsed_nsec, - domctl->u.tsc_info.info.gtsc_khz, - domctl->u.tsc_info.info.incarnation); - domain_unpause(d); - - ret = 0; - } - break; + if ( d == currd ) /* no domain_pause() */ + ret = -EINVAL; + else + { + domain_pause(d); + tsc_set_info(d, domctl->u.tsc_info.info.tsc_mode, + domctl->u.tsc_info.info.elapsed_nsec, + domctl->u.tsc_info.info.gtsc_khz, + domctl->u.tsc_info.info.incarnation); + domain_unpause(d); + } + break; case XEN_DOMCTL_suppress_spurious_page_faults: - { d->arch.suppress_spurious_page_faults = 1; - ret = 0; - } - break; + break; case XEN_DOMCTL_debug_op: { @@ -941,19 +900,15 @@ long arch_do_domctl( break; ret = hvm_debug_op(v, domctl->u.debug_op.op); + break; } - break; case XEN_DOMCTL_gdbsx_guestmemio: - { - domctl->u.gdbsx_guest_memio.remain = - domctl->u.gdbsx_guest_memio.len; - + domctl->u.gdbsx_guest_memio.remain = domctl->u.gdbsx_guest_memio.len; ret = gdbsx_guest_mem_io(domctl->domain, &domctl->u.gdbsx_guest_memio); if ( !ret ) copyback = 1; - } - break; + break; case XEN_DOMCTL_gdbsx_pausevcpu: { @@ -967,8 +922,8 @@ long arch_do_domctl( (v = d->vcpu[domctl->u.gdbsx_pauseunp_vcpu.vcpu]) == NULL ) break; ret = vcpu_pause_by_systemcontroller(v); + break; } - break; case XEN_DOMCTL_gdbsx_unpausevcpu: { @@ -985,9 +940,9 @@ long arch_do_domctl( if ( ret == -EINVAL ) printk(XENLOG_G_WARNING "WARN: d%d attempting to unpause %pv which is not paused\n", - current->domain->domain_id, v); + currd->domain_id, v); + break; } - break; case XEN_DOMCTL_gdbsx_domstatus: { @@ -1009,29 +964,26 @@ long arch_do_domctl( } } } - ret = 0; copyback = 1; + break; } - break; case XEN_DOMCTL_setvcpuextstate: case XEN_DOMCTL_getvcpuextstate: { - struct xen_domctl_vcpuextstate *evc; + struct xen_domctl_vcpuextstate *evc = &domctl->u.vcpuextstate; struct vcpu *v; uint32_t offset = 0; #define PV_XSAVE_SIZE(xcr0) (2 * sizeof(uint64_t) + xstate_ctxt_size(xcr0)) - evc = &domctl->u.vcpuextstate; - ret = -ESRCH; if ( (evc->vcpu >= d->max_vcpus) || ((v = d->vcpu[evc->vcpu]) == NULL) ) goto vcpuextstate_out; ret = -EINVAL; - if ( v == current ) /* no vcpu_pause() */ + if ( v == curr ) /* no vcpu_pause() */ goto vcpuextstate_out; if ( domctl->cmd == XEN_DOMCTL_getvcpuextstate ) @@ -1137,31 +1089,26 @@ long arch_do_domctl( vcpuextstate_out: if ( domctl->cmd == XEN_DOMCTL_getvcpuextstate ) copyback = 1; + break; } - break; case XEN_DOMCTL_mem_sharing_op: - { ret = mem_sharing_domctl(d, &domctl->u.mem_sharing_op); - } - break; + break; #if P2M_AUDIT case XEN_DOMCTL_audit_p2m: - { - if ( d == current->domain ) - { + if ( d == currd ) ret = -EPERM; - break; + else + { + audit_p2m(d, + &domctl->u.audit_p2m.orphans, + &domctl->u.audit_p2m.m2p_bad, + &domctl->u.audit_p2m.p2m_bad); + copyback = 1; } - - audit_p2m(d, - &domctl->u.audit_p2m.orphans, - &domctl->u.audit_p2m.m2p_bad, - &domctl->u.audit_p2m.p2m_bad); - copyback = 1; - } - break; + break; #endif /* P2M_AUDIT */ case XEN_DOMCTL_set_broken_page_p2m: @@ -1176,8 +1123,8 @@ long arch_do_domctl( ret = p2m_change_type_one(d, pfn, pt, p2m_ram_broken); put_gfn(d, pfn); + break; } - break; case XEN_DOMCTL_get_vcpu_msrs: case XEN_DOMCTL_set_vcpu_msrs: @@ -1193,7 +1140,7 @@ long arch_do_domctl( break; ret = -EINVAL; - if ( (v == current) || /* no vcpu_pause() */ + if ( (v == curr) || /* no vcpu_pause() */ !is_pv_domain(d) ) break; @@ -1303,8 +1250,8 @@ long arch_do_domctl( copyback = 1; } } + break; } - break; case XEN_DOMCTL_psr_cmt_op: if ( !psr_cmt_enabled() ) @@ -1318,16 +1265,19 @@ long arch_do_domctl( case XEN_DOMCTL_PSR_CMT_OP_ATTACH: ret = psr_alloc_rmid(d); break; + case XEN_DOMCTL_PSR_CMT_OP_DETACH: if ( d->arch.psr_rmid > 0 ) psr_free_rmid(d); else ret = -ENOENT; break; + case XEN_DOMCTL_PSR_CMT_OP_QUERY_RMID: domctl->u.psr_cmt_op.data = d->arch.psr_rmid; copyback = 1; break; + default: ret = -ENOSYS; break; -- 1.7.10.4 _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel