![Sean Christopherson](/assets/img/avatar_default.png)
Through a labyrinthian sequence of includes, usage of page_to_phys(), virt_to_phys() and out*() is dependent on the include of asm/io.h in x86's asm/realmode.h, which is included in x86's asm/acpi.h and thus by linux/acpi.h. Explicitly include linux/io.h to break the dependency on realmode.h so that a future patch can remove the realmode.h include from acpi.h without breaking the build. Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com> Link: https://lkml.kernel.org/r/20191126165417.22423-8-sean.j.christopherson@intel.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
1649 lines
43 KiB
C
1649 lines
43 KiB
C
/* SPDX-License-Identifier: (GPL-2.0 OR CDDL-1.0) */
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/*
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* vboxguest core guest-device handling code, VBoxGuest.cpp in upstream svn.
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*
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* Copyright (C) 2007-2016 Oracle Corporation
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*/
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#include <linux/device.h>
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#include <linux/io.h>
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#include <linux/mm.h>
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#include <linux/sched.h>
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#include <linux/sizes.h>
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#include <linux/slab.h>
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#include <linux/vbox_err.h>
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#include <linux/vbox_utils.h>
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#include <linux/vmalloc.h>
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#include "vboxguest_core.h"
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#include "vboxguest_version.h"
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/* Get the pointer to the first HGCM parameter. */
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#define VBG_IOCTL_HGCM_CALL_PARMS(a) \
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((struct vmmdev_hgcm_function_parameter *)( \
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(u8 *)(a) + sizeof(struct vbg_ioctl_hgcm_call)))
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/* Get the pointer to the first HGCM parameter in a 32-bit request. */
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#define VBG_IOCTL_HGCM_CALL_PARMS32(a) \
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((struct vmmdev_hgcm_function_parameter32 *)( \
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(u8 *)(a) + sizeof(struct vbg_ioctl_hgcm_call)))
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#define GUEST_MAPPINGS_TRIES 5
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#define VBG_KERNEL_REQUEST \
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(VMMDEV_REQUESTOR_KERNEL | VMMDEV_REQUESTOR_USR_DRV | \
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VMMDEV_REQUESTOR_CON_DONT_KNOW | VMMDEV_REQUESTOR_TRUST_NOT_GIVEN)
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/**
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* Reserves memory in which the VMM can relocate any guest mappings
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* that are floating around.
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*
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* This operation is a little bit tricky since the VMM might not accept
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* just any address because of address clashes between the three contexts
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* it operates in, so we try several times.
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*
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* Failure to reserve the guest mappings is ignored.
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*
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* @gdev: The Guest extension device.
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*/
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static void vbg_guest_mappings_init(struct vbg_dev *gdev)
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{
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struct vmmdev_hypervisorinfo *req;
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void *guest_mappings[GUEST_MAPPINGS_TRIES];
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struct page **pages = NULL;
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u32 size, hypervisor_size;
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int i, rc;
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/* Query the required space. */
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req = vbg_req_alloc(sizeof(*req), VMMDEVREQ_GET_HYPERVISOR_INFO,
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VBG_KERNEL_REQUEST);
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if (!req)
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return;
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req->hypervisor_start = 0;
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req->hypervisor_size = 0;
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rc = vbg_req_perform(gdev, req);
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if (rc < 0)
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goto out;
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/*
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* The VMM will report back if there is nothing it wants to map, like
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* for instance in VT-x and AMD-V mode.
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*/
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if (req->hypervisor_size == 0)
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goto out;
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hypervisor_size = req->hypervisor_size;
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/* Add 4M so that we can align the vmap to 4MiB as the host requires. */
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size = PAGE_ALIGN(req->hypervisor_size) + SZ_4M;
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pages = kmalloc_array(size >> PAGE_SHIFT, sizeof(*pages), GFP_KERNEL);
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if (!pages)
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goto out;
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gdev->guest_mappings_dummy_page = alloc_page(GFP_HIGHUSER);
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if (!gdev->guest_mappings_dummy_page)
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goto out;
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for (i = 0; i < (size >> PAGE_SHIFT); i++)
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pages[i] = gdev->guest_mappings_dummy_page;
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/*
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* Try several times, the VMM might not accept some addresses because
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* of address clashes between the three contexts.
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*/
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for (i = 0; i < GUEST_MAPPINGS_TRIES; i++) {
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guest_mappings[i] = vmap(pages, (size >> PAGE_SHIFT),
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VM_MAP, PAGE_KERNEL_RO);
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if (!guest_mappings[i])
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break;
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req->header.request_type = VMMDEVREQ_SET_HYPERVISOR_INFO;
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req->header.rc = VERR_INTERNAL_ERROR;
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req->hypervisor_size = hypervisor_size;
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req->hypervisor_start =
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(unsigned long)PTR_ALIGN(guest_mappings[i], SZ_4M);
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rc = vbg_req_perform(gdev, req);
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if (rc >= 0) {
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gdev->guest_mappings = guest_mappings[i];
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break;
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}
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}
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/* Free vmap's from failed attempts. */
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while (--i >= 0)
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vunmap(guest_mappings[i]);
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/* On failure free the dummy-page backing the vmap */
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if (!gdev->guest_mappings) {
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__free_page(gdev->guest_mappings_dummy_page);
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gdev->guest_mappings_dummy_page = NULL;
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}
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out:
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vbg_req_free(req, sizeof(*req));
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kfree(pages);
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}
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/**
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* Undo what vbg_guest_mappings_init did.
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*
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* @gdev: The Guest extension device.
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*/
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static void vbg_guest_mappings_exit(struct vbg_dev *gdev)
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{
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struct vmmdev_hypervisorinfo *req;
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int rc;
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if (!gdev->guest_mappings)
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return;
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/*
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* Tell the host that we're going to free the memory we reserved for
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* it, the free it up. (Leak the memory if anything goes wrong here.)
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*/
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req = vbg_req_alloc(sizeof(*req), VMMDEVREQ_SET_HYPERVISOR_INFO,
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VBG_KERNEL_REQUEST);
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if (!req)
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return;
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req->hypervisor_start = 0;
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req->hypervisor_size = 0;
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rc = vbg_req_perform(gdev, req);
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vbg_req_free(req, sizeof(*req));
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if (rc < 0) {
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vbg_err("%s error: %d\n", __func__, rc);
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return;
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}
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vunmap(gdev->guest_mappings);
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gdev->guest_mappings = NULL;
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__free_page(gdev->guest_mappings_dummy_page);
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gdev->guest_mappings_dummy_page = NULL;
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}
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/**
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* Report the guest information to the host.
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* Return: 0 or negative errno value.
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* @gdev: The Guest extension device.
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*/
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static int vbg_report_guest_info(struct vbg_dev *gdev)
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{
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/*
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* Allocate and fill in the two guest info reports.
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*/
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struct vmmdev_guest_info *req1 = NULL;
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struct vmmdev_guest_info2 *req2 = NULL;
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int rc, ret = -ENOMEM;
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req1 = vbg_req_alloc(sizeof(*req1), VMMDEVREQ_REPORT_GUEST_INFO,
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VBG_KERNEL_REQUEST);
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req2 = vbg_req_alloc(sizeof(*req2), VMMDEVREQ_REPORT_GUEST_INFO2,
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VBG_KERNEL_REQUEST);
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if (!req1 || !req2)
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goto out_free;
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req1->interface_version = VMMDEV_VERSION;
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req1->os_type = VMMDEV_OSTYPE_LINUX26;
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#if __BITS_PER_LONG == 64
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req1->os_type |= VMMDEV_OSTYPE_X64;
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#endif
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req2->additions_major = VBG_VERSION_MAJOR;
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req2->additions_minor = VBG_VERSION_MINOR;
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req2->additions_build = VBG_VERSION_BUILD;
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req2->additions_revision = VBG_SVN_REV;
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req2->additions_features =
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VMMDEV_GUEST_INFO2_ADDITIONS_FEATURES_REQUESTOR_INFO;
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strlcpy(req2->name, VBG_VERSION_STRING,
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sizeof(req2->name));
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/*
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* There are two protocols here:
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* 1. INFO2 + INFO1. Supported by >=3.2.51.
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* 2. INFO1 and optionally INFO2. The old protocol.
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*
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* We try protocol 2 first. It will fail with VERR_NOT_SUPPORTED
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* if not supported by the VMMDev (message ordering requirement).
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*/
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rc = vbg_req_perform(gdev, req2);
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if (rc >= 0) {
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rc = vbg_req_perform(gdev, req1);
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} else if (rc == VERR_NOT_SUPPORTED || rc == VERR_NOT_IMPLEMENTED) {
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rc = vbg_req_perform(gdev, req1);
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if (rc >= 0) {
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rc = vbg_req_perform(gdev, req2);
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if (rc == VERR_NOT_IMPLEMENTED)
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rc = VINF_SUCCESS;
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}
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}
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ret = vbg_status_code_to_errno(rc);
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out_free:
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vbg_req_free(req2, sizeof(*req2));
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vbg_req_free(req1, sizeof(*req1));
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return ret;
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}
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/**
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* Report the guest driver status to the host.
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* Return: 0 or negative errno value.
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* @gdev: The Guest extension device.
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* @active: Flag whether the driver is now active or not.
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*/
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static int vbg_report_driver_status(struct vbg_dev *gdev, bool active)
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{
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struct vmmdev_guest_status *req;
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int rc;
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req = vbg_req_alloc(sizeof(*req), VMMDEVREQ_REPORT_GUEST_STATUS,
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VBG_KERNEL_REQUEST);
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if (!req)
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return -ENOMEM;
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req->facility = VBOXGUEST_FACILITY_TYPE_VBOXGUEST_DRIVER;
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if (active)
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req->status = VBOXGUEST_FACILITY_STATUS_ACTIVE;
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else
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req->status = VBOXGUEST_FACILITY_STATUS_INACTIVE;
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req->flags = 0;
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rc = vbg_req_perform(gdev, req);
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if (rc == VERR_NOT_IMPLEMENTED) /* Compatibility with older hosts. */
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rc = VINF_SUCCESS;
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vbg_req_free(req, sizeof(*req));
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return vbg_status_code_to_errno(rc);
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}
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/**
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* Inflate the balloon by one chunk. The caller owns the balloon mutex.
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* Return: 0 or negative errno value.
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* @gdev: The Guest extension device.
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* @chunk_idx: Index of the chunk.
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*/
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static int vbg_balloon_inflate(struct vbg_dev *gdev, u32 chunk_idx)
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{
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struct vmmdev_memballoon_change *req = gdev->mem_balloon.change_req;
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struct page **pages;
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int i, rc, ret;
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pages = kmalloc_array(VMMDEV_MEMORY_BALLOON_CHUNK_PAGES,
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sizeof(*pages),
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GFP_KERNEL | __GFP_NOWARN);
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if (!pages)
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return -ENOMEM;
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req->header.size = sizeof(*req);
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req->inflate = true;
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req->pages = VMMDEV_MEMORY_BALLOON_CHUNK_PAGES;
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for (i = 0; i < VMMDEV_MEMORY_BALLOON_CHUNK_PAGES; i++) {
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pages[i] = alloc_page(GFP_KERNEL | __GFP_NOWARN);
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if (!pages[i]) {
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ret = -ENOMEM;
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goto out_error;
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}
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req->phys_page[i] = page_to_phys(pages[i]);
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}
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rc = vbg_req_perform(gdev, req);
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if (rc < 0) {
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vbg_err("%s error, rc: %d\n", __func__, rc);
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ret = vbg_status_code_to_errno(rc);
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goto out_error;
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}
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gdev->mem_balloon.pages[chunk_idx] = pages;
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return 0;
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out_error:
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while (--i >= 0)
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__free_page(pages[i]);
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kfree(pages);
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return ret;
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}
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/**
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* Deflate the balloon by one chunk. The caller owns the balloon mutex.
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* Return: 0 or negative errno value.
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* @gdev: The Guest extension device.
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* @chunk_idx: Index of the chunk.
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*/
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static int vbg_balloon_deflate(struct vbg_dev *gdev, u32 chunk_idx)
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{
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struct vmmdev_memballoon_change *req = gdev->mem_balloon.change_req;
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struct page **pages = gdev->mem_balloon.pages[chunk_idx];
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int i, rc;
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req->header.size = sizeof(*req);
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req->inflate = false;
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req->pages = VMMDEV_MEMORY_BALLOON_CHUNK_PAGES;
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for (i = 0; i < VMMDEV_MEMORY_BALLOON_CHUNK_PAGES; i++)
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req->phys_page[i] = page_to_phys(pages[i]);
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rc = vbg_req_perform(gdev, req);
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if (rc < 0) {
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vbg_err("%s error, rc: %d\n", __func__, rc);
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return vbg_status_code_to_errno(rc);
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}
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for (i = 0; i < VMMDEV_MEMORY_BALLOON_CHUNK_PAGES; i++)
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__free_page(pages[i]);
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kfree(pages);
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gdev->mem_balloon.pages[chunk_idx] = NULL;
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return 0;
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}
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/**
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* Respond to VMMDEV_EVENT_BALLOON_CHANGE_REQUEST events, query the size
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* the host wants the balloon to be and adjust accordingly.
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*/
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static void vbg_balloon_work(struct work_struct *work)
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{
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struct vbg_dev *gdev =
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container_of(work, struct vbg_dev, mem_balloon.work);
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struct vmmdev_memballoon_info *req = gdev->mem_balloon.get_req;
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u32 i, chunks;
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int rc, ret;
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/*
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* Setting this bit means that we request the value from the host and
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* change the guest memory balloon according to the returned value.
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*/
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req->event_ack = VMMDEV_EVENT_BALLOON_CHANGE_REQUEST;
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rc = vbg_req_perform(gdev, req);
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if (rc < 0) {
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vbg_err("%s error, rc: %d)\n", __func__, rc);
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return;
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}
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/*
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* The host always returns the same maximum amount of chunks, so
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* we do this once.
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*/
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if (!gdev->mem_balloon.max_chunks) {
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gdev->mem_balloon.pages =
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devm_kcalloc(gdev->dev, req->phys_mem_chunks,
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sizeof(struct page **), GFP_KERNEL);
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if (!gdev->mem_balloon.pages)
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return;
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gdev->mem_balloon.max_chunks = req->phys_mem_chunks;
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}
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chunks = req->balloon_chunks;
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if (chunks > gdev->mem_balloon.max_chunks) {
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vbg_err("%s: illegal balloon size %u (max=%u)\n",
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__func__, chunks, gdev->mem_balloon.max_chunks);
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return;
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}
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if (chunks > gdev->mem_balloon.chunks) {
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/* inflate */
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for (i = gdev->mem_balloon.chunks; i < chunks; i++) {
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ret = vbg_balloon_inflate(gdev, i);
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if (ret < 0)
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return;
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gdev->mem_balloon.chunks++;
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}
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} else {
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/* deflate */
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for (i = gdev->mem_balloon.chunks; i-- > chunks;) {
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ret = vbg_balloon_deflate(gdev, i);
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if (ret < 0)
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return;
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gdev->mem_balloon.chunks--;
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}
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}
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}
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/**
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* Callback for heartbeat timer.
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*/
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static void vbg_heartbeat_timer(struct timer_list *t)
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{
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struct vbg_dev *gdev = from_timer(gdev, t, heartbeat_timer);
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vbg_req_perform(gdev, gdev->guest_heartbeat_req);
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mod_timer(&gdev->heartbeat_timer,
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msecs_to_jiffies(gdev->heartbeat_interval_ms));
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}
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/**
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* Configure the host to check guest's heartbeat
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* and get heartbeat interval from the host.
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* Return: 0 or negative errno value.
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* @gdev: The Guest extension device.
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* @enabled: Set true to enable guest heartbeat checks on host.
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*/
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static int vbg_heartbeat_host_config(struct vbg_dev *gdev, bool enabled)
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{
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struct vmmdev_heartbeat *req;
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int rc;
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req = vbg_req_alloc(sizeof(*req), VMMDEVREQ_HEARTBEAT_CONFIGURE,
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VBG_KERNEL_REQUEST);
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if (!req)
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return -ENOMEM;
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req->enabled = enabled;
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req->interval_ns = 0;
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rc = vbg_req_perform(gdev, req);
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do_div(req->interval_ns, 1000000); /* ns -> ms */
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gdev->heartbeat_interval_ms = req->interval_ns;
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vbg_req_free(req, sizeof(*req));
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return vbg_status_code_to_errno(rc);
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}
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|
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/**
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* Initializes the heartbeat timer. This feature may be disabled by the host.
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* Return: 0 or negative errno value.
|
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* @gdev: The Guest extension device.
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*/
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static int vbg_heartbeat_init(struct vbg_dev *gdev)
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{
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int ret;
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|
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/* Make sure that heartbeat checking is disabled if we fail. */
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ret = vbg_heartbeat_host_config(gdev, false);
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if (ret < 0)
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return ret;
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|
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ret = vbg_heartbeat_host_config(gdev, true);
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if (ret < 0)
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return ret;
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|
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gdev->guest_heartbeat_req = vbg_req_alloc(
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sizeof(*gdev->guest_heartbeat_req),
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VMMDEVREQ_GUEST_HEARTBEAT,
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VBG_KERNEL_REQUEST);
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if (!gdev->guest_heartbeat_req)
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return -ENOMEM;
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|
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vbg_info("%s: Setting up heartbeat to trigger every %d milliseconds\n",
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__func__, gdev->heartbeat_interval_ms);
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mod_timer(&gdev->heartbeat_timer, 0);
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|
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return 0;
|
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}
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|
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/**
|
|
* Cleanup hearbeat code, stop HB timer and disable host heartbeat checking.
|
|
* @gdev: The Guest extension device.
|
|
*/
|
|
static void vbg_heartbeat_exit(struct vbg_dev *gdev)
|
|
{
|
|
del_timer_sync(&gdev->heartbeat_timer);
|
|
vbg_heartbeat_host_config(gdev, false);
|
|
vbg_req_free(gdev->guest_heartbeat_req,
|
|
sizeof(*gdev->guest_heartbeat_req));
|
|
}
|
|
|
|
/**
|
|
* Applies a change to the bit usage tracker.
|
|
* Return: true if the mask changed, false if not.
|
|
* @tracker: The bit usage tracker.
|
|
* @changed: The bits to change.
|
|
* @previous: The previous value of the bits.
|
|
*/
|
|
static bool vbg_track_bit_usage(struct vbg_bit_usage_tracker *tracker,
|
|
u32 changed, u32 previous)
|
|
{
|
|
bool global_change = false;
|
|
|
|
while (changed) {
|
|
u32 bit = ffs(changed) - 1;
|
|
u32 bitmask = BIT(bit);
|
|
|
|
if (bitmask & previous) {
|
|
tracker->per_bit_usage[bit] -= 1;
|
|
if (tracker->per_bit_usage[bit] == 0) {
|
|
global_change = true;
|
|
tracker->mask &= ~bitmask;
|
|
}
|
|
} else {
|
|
tracker->per_bit_usage[bit] += 1;
|
|
if (tracker->per_bit_usage[bit] == 1) {
|
|
global_change = true;
|
|
tracker->mask |= bitmask;
|
|
}
|
|
}
|
|
|
|
changed &= ~bitmask;
|
|
}
|
|
|
|
return global_change;
|
|
}
|
|
|
|
/**
|
|
* Init and termination worker for resetting the (host) event filter on the host
|
|
* Return: 0 or negative errno value.
|
|
* @gdev: The Guest extension device.
|
|
* @fixed_events: Fixed events (init time).
|
|
*/
|
|
static int vbg_reset_host_event_filter(struct vbg_dev *gdev,
|
|
u32 fixed_events)
|
|
{
|
|
struct vmmdev_mask *req;
|
|
int rc;
|
|
|
|
req = vbg_req_alloc(sizeof(*req), VMMDEVREQ_CTL_GUEST_FILTER_MASK,
|
|
VBG_KERNEL_REQUEST);
|
|
if (!req)
|
|
return -ENOMEM;
|
|
|
|
req->not_mask = U32_MAX & ~fixed_events;
|
|
req->or_mask = fixed_events;
|
|
rc = vbg_req_perform(gdev, req);
|
|
if (rc < 0)
|
|
vbg_err("%s error, rc: %d\n", __func__, rc);
|
|
|
|
vbg_req_free(req, sizeof(*req));
|
|
return vbg_status_code_to_errno(rc);
|
|
}
|
|
|
|
/**
|
|
* Changes the event filter mask for the given session.
|
|
*
|
|
* This is called in response to VBG_IOCTL_CHANGE_FILTER_MASK as well as to
|
|
* do session cleanup. Takes the session spinlock.
|
|
*
|
|
* Return: 0 or negative errno value.
|
|
* @gdev: The Guest extension device.
|
|
* @session: The session.
|
|
* @or_mask: The events to add.
|
|
* @not_mask: The events to remove.
|
|
* @session_termination: Set if we're called by the session cleanup code.
|
|
* This tweaks the error handling so we perform
|
|
* proper session cleanup even if the host
|
|
* misbehaves.
|
|
*/
|
|
static int vbg_set_session_event_filter(struct vbg_dev *gdev,
|
|
struct vbg_session *session,
|
|
u32 or_mask, u32 not_mask,
|
|
bool session_termination)
|
|
{
|
|
struct vmmdev_mask *req;
|
|
u32 changed, previous;
|
|
int rc, ret = 0;
|
|
|
|
/*
|
|
* Allocate a request buffer before taking the spinlock, when
|
|
* the session is being terminated the requestor is the kernel,
|
|
* as we're cleaning up.
|
|
*/
|
|
req = vbg_req_alloc(sizeof(*req), VMMDEVREQ_CTL_GUEST_FILTER_MASK,
|
|
session_termination ? VBG_KERNEL_REQUEST :
|
|
session->requestor);
|
|
if (!req) {
|
|
if (!session_termination)
|
|
return -ENOMEM;
|
|
/* Ignore allocation failure, we must do session cleanup. */
|
|
}
|
|
|
|
mutex_lock(&gdev->session_mutex);
|
|
|
|
/* Apply the changes to the session mask. */
|
|
previous = session->event_filter;
|
|
session->event_filter |= or_mask;
|
|
session->event_filter &= ~not_mask;
|
|
|
|
/* If anything actually changed, update the global usage counters. */
|
|
changed = previous ^ session->event_filter;
|
|
if (!changed)
|
|
goto out;
|
|
|
|
vbg_track_bit_usage(&gdev->event_filter_tracker, changed, previous);
|
|
or_mask = gdev->fixed_events | gdev->event_filter_tracker.mask;
|
|
|
|
if (gdev->event_filter_host == or_mask || !req)
|
|
goto out;
|
|
|
|
gdev->event_filter_host = or_mask;
|
|
req->or_mask = or_mask;
|
|
req->not_mask = ~or_mask;
|
|
rc = vbg_req_perform(gdev, req);
|
|
if (rc < 0) {
|
|
ret = vbg_status_code_to_errno(rc);
|
|
|
|
/* Failed, roll back (unless it's session termination time). */
|
|
gdev->event_filter_host = U32_MAX;
|
|
if (session_termination)
|
|
goto out;
|
|
|
|
vbg_track_bit_usage(&gdev->event_filter_tracker, changed,
|
|
session->event_filter);
|
|
session->event_filter = previous;
|
|
}
|
|
|
|
out:
|
|
mutex_unlock(&gdev->session_mutex);
|
|
vbg_req_free(req, sizeof(*req));
|
|
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* Init and termination worker for set guest capabilities to zero on the host.
|
|
* Return: 0 or negative errno value.
|
|
* @gdev: The Guest extension device.
|
|
*/
|
|
static int vbg_reset_host_capabilities(struct vbg_dev *gdev)
|
|
{
|
|
struct vmmdev_mask *req;
|
|
int rc;
|
|
|
|
req = vbg_req_alloc(sizeof(*req), VMMDEVREQ_SET_GUEST_CAPABILITIES,
|
|
VBG_KERNEL_REQUEST);
|
|
if (!req)
|
|
return -ENOMEM;
|
|
|
|
req->not_mask = U32_MAX;
|
|
req->or_mask = 0;
|
|
rc = vbg_req_perform(gdev, req);
|
|
if (rc < 0)
|
|
vbg_err("%s error, rc: %d\n", __func__, rc);
|
|
|
|
vbg_req_free(req, sizeof(*req));
|
|
return vbg_status_code_to_errno(rc);
|
|
}
|
|
|
|
/**
|
|
* Sets the guest capabilities for a session. Takes the session spinlock.
|
|
* Return: 0 or negative errno value.
|
|
* @gdev: The Guest extension device.
|
|
* @session: The session.
|
|
* @or_mask: The capabilities to add.
|
|
* @not_mask: The capabilities to remove.
|
|
* @session_termination: Set if we're called by the session cleanup code.
|
|
* This tweaks the error handling so we perform
|
|
* proper session cleanup even if the host
|
|
* misbehaves.
|
|
*/
|
|
static int vbg_set_session_capabilities(struct vbg_dev *gdev,
|
|
struct vbg_session *session,
|
|
u32 or_mask, u32 not_mask,
|
|
bool session_termination)
|
|
{
|
|
struct vmmdev_mask *req;
|
|
u32 changed, previous;
|
|
int rc, ret = 0;
|
|
|
|
/*
|
|
* Allocate a request buffer before taking the spinlock, when
|
|
* the session is being terminated the requestor is the kernel,
|
|
* as we're cleaning up.
|
|
*/
|
|
req = vbg_req_alloc(sizeof(*req), VMMDEVREQ_SET_GUEST_CAPABILITIES,
|
|
session_termination ? VBG_KERNEL_REQUEST :
|
|
session->requestor);
|
|
if (!req) {
|
|
if (!session_termination)
|
|
return -ENOMEM;
|
|
/* Ignore allocation failure, we must do session cleanup. */
|
|
}
|
|
|
|
mutex_lock(&gdev->session_mutex);
|
|
|
|
/* Apply the changes to the session mask. */
|
|
previous = session->guest_caps;
|
|
session->guest_caps |= or_mask;
|
|
session->guest_caps &= ~not_mask;
|
|
|
|
/* If anything actually changed, update the global usage counters. */
|
|
changed = previous ^ session->guest_caps;
|
|
if (!changed)
|
|
goto out;
|
|
|
|
vbg_track_bit_usage(&gdev->guest_caps_tracker, changed, previous);
|
|
or_mask = gdev->guest_caps_tracker.mask;
|
|
|
|
if (gdev->guest_caps_host == or_mask || !req)
|
|
goto out;
|
|
|
|
gdev->guest_caps_host = or_mask;
|
|
req->or_mask = or_mask;
|
|
req->not_mask = ~or_mask;
|
|
rc = vbg_req_perform(gdev, req);
|
|
if (rc < 0) {
|
|
ret = vbg_status_code_to_errno(rc);
|
|
|
|
/* Failed, roll back (unless it's session termination time). */
|
|
gdev->guest_caps_host = U32_MAX;
|
|
if (session_termination)
|
|
goto out;
|
|
|
|
vbg_track_bit_usage(&gdev->guest_caps_tracker, changed,
|
|
session->guest_caps);
|
|
session->guest_caps = previous;
|
|
}
|
|
|
|
out:
|
|
mutex_unlock(&gdev->session_mutex);
|
|
vbg_req_free(req, sizeof(*req));
|
|
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* vbg_query_host_version get the host feature mask and version information.
|
|
* Return: 0 or negative errno value.
|
|
* @gdev: The Guest extension device.
|
|
*/
|
|
static int vbg_query_host_version(struct vbg_dev *gdev)
|
|
{
|
|
struct vmmdev_host_version *req;
|
|
int rc, ret;
|
|
|
|
req = vbg_req_alloc(sizeof(*req), VMMDEVREQ_GET_HOST_VERSION,
|
|
VBG_KERNEL_REQUEST);
|
|
if (!req)
|
|
return -ENOMEM;
|
|
|
|
rc = vbg_req_perform(gdev, req);
|
|
ret = vbg_status_code_to_errno(rc);
|
|
if (ret) {
|
|
vbg_err("%s error: %d\n", __func__, rc);
|
|
goto out;
|
|
}
|
|
|
|
snprintf(gdev->host_version, sizeof(gdev->host_version), "%u.%u.%ur%u",
|
|
req->major, req->minor, req->build, req->revision);
|
|
gdev->host_features = req->features;
|
|
|
|
vbg_info("vboxguest: host-version: %s %#x\n", gdev->host_version,
|
|
gdev->host_features);
|
|
|
|
if (!(req->features & VMMDEV_HVF_HGCM_PHYS_PAGE_LIST)) {
|
|
vbg_err("vboxguest: Error host too old (does not support page-lists)\n");
|
|
ret = -ENODEV;
|
|
}
|
|
|
|
out:
|
|
vbg_req_free(req, sizeof(*req));
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* Initializes the VBoxGuest device extension when the
|
|
* device driver is loaded.
|
|
*
|
|
* The native code locates the VMMDev on the PCI bus and retrieve
|
|
* the MMIO and I/O port ranges, this function will take care of
|
|
* mapping the MMIO memory (if present). Upon successful return
|
|
* the native code should set up the interrupt handler.
|
|
*
|
|
* Return: 0 or negative errno value.
|
|
*
|
|
* @gdev: The Guest extension device.
|
|
* @fixed_events: Events that will be enabled upon init and no client
|
|
* will ever be allowed to mask.
|
|
*/
|
|
int vbg_core_init(struct vbg_dev *gdev, u32 fixed_events)
|
|
{
|
|
int ret = -ENOMEM;
|
|
|
|
gdev->fixed_events = fixed_events | VMMDEV_EVENT_HGCM;
|
|
gdev->event_filter_host = U32_MAX; /* forces a report */
|
|
gdev->guest_caps_host = U32_MAX; /* forces a report */
|
|
|
|
init_waitqueue_head(&gdev->event_wq);
|
|
init_waitqueue_head(&gdev->hgcm_wq);
|
|
spin_lock_init(&gdev->event_spinlock);
|
|
mutex_init(&gdev->session_mutex);
|
|
mutex_init(&gdev->cancel_req_mutex);
|
|
timer_setup(&gdev->heartbeat_timer, vbg_heartbeat_timer, 0);
|
|
INIT_WORK(&gdev->mem_balloon.work, vbg_balloon_work);
|
|
|
|
gdev->mem_balloon.get_req =
|
|
vbg_req_alloc(sizeof(*gdev->mem_balloon.get_req),
|
|
VMMDEVREQ_GET_MEMBALLOON_CHANGE_REQ,
|
|
VBG_KERNEL_REQUEST);
|
|
gdev->mem_balloon.change_req =
|
|
vbg_req_alloc(sizeof(*gdev->mem_balloon.change_req),
|
|
VMMDEVREQ_CHANGE_MEMBALLOON,
|
|
VBG_KERNEL_REQUEST);
|
|
gdev->cancel_req =
|
|
vbg_req_alloc(sizeof(*(gdev->cancel_req)),
|
|
VMMDEVREQ_HGCM_CANCEL2,
|
|
VBG_KERNEL_REQUEST);
|
|
gdev->ack_events_req =
|
|
vbg_req_alloc(sizeof(*gdev->ack_events_req),
|
|
VMMDEVREQ_ACKNOWLEDGE_EVENTS,
|
|
VBG_KERNEL_REQUEST);
|
|
gdev->mouse_status_req =
|
|
vbg_req_alloc(sizeof(*gdev->mouse_status_req),
|
|
VMMDEVREQ_GET_MOUSE_STATUS,
|
|
VBG_KERNEL_REQUEST);
|
|
|
|
if (!gdev->mem_balloon.get_req || !gdev->mem_balloon.change_req ||
|
|
!gdev->cancel_req || !gdev->ack_events_req ||
|
|
!gdev->mouse_status_req)
|
|
goto err_free_reqs;
|
|
|
|
ret = vbg_query_host_version(gdev);
|
|
if (ret)
|
|
goto err_free_reqs;
|
|
|
|
ret = vbg_report_guest_info(gdev);
|
|
if (ret) {
|
|
vbg_err("vboxguest: vbg_report_guest_info error: %d\n", ret);
|
|
goto err_free_reqs;
|
|
}
|
|
|
|
ret = vbg_reset_host_event_filter(gdev, gdev->fixed_events);
|
|
if (ret) {
|
|
vbg_err("vboxguest: Error setting fixed event filter: %d\n",
|
|
ret);
|
|
goto err_free_reqs;
|
|
}
|
|
|
|
ret = vbg_reset_host_capabilities(gdev);
|
|
if (ret) {
|
|
vbg_err("vboxguest: Error clearing guest capabilities: %d\n",
|
|
ret);
|
|
goto err_free_reqs;
|
|
}
|
|
|
|
ret = vbg_core_set_mouse_status(gdev, 0);
|
|
if (ret) {
|
|
vbg_err("vboxguest: Error clearing mouse status: %d\n", ret);
|
|
goto err_free_reqs;
|
|
}
|
|
|
|
/* These may fail without requiring the driver init to fail. */
|
|
vbg_guest_mappings_init(gdev);
|
|
vbg_heartbeat_init(gdev);
|
|
|
|
/* All Done! */
|
|
ret = vbg_report_driver_status(gdev, true);
|
|
if (ret < 0)
|
|
vbg_err("vboxguest: Error reporting driver status: %d\n", ret);
|
|
|
|
return 0;
|
|
|
|
err_free_reqs:
|
|
vbg_req_free(gdev->mouse_status_req,
|
|
sizeof(*gdev->mouse_status_req));
|
|
vbg_req_free(gdev->ack_events_req,
|
|
sizeof(*gdev->ack_events_req));
|
|
vbg_req_free(gdev->cancel_req,
|
|
sizeof(*gdev->cancel_req));
|
|
vbg_req_free(gdev->mem_balloon.change_req,
|
|
sizeof(*gdev->mem_balloon.change_req));
|
|
vbg_req_free(gdev->mem_balloon.get_req,
|
|
sizeof(*gdev->mem_balloon.get_req));
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* Call this on exit to clean-up vboxguest-core managed resources.
|
|
*
|
|
* The native code should call this before the driver is loaded,
|
|
* but don't call this on shutdown.
|
|
* @gdev: The Guest extension device.
|
|
*/
|
|
void vbg_core_exit(struct vbg_dev *gdev)
|
|
{
|
|
vbg_heartbeat_exit(gdev);
|
|
vbg_guest_mappings_exit(gdev);
|
|
|
|
/* Clear the host flags (mouse status etc). */
|
|
vbg_reset_host_event_filter(gdev, 0);
|
|
vbg_reset_host_capabilities(gdev);
|
|
vbg_core_set_mouse_status(gdev, 0);
|
|
|
|
vbg_req_free(gdev->mouse_status_req,
|
|
sizeof(*gdev->mouse_status_req));
|
|
vbg_req_free(gdev->ack_events_req,
|
|
sizeof(*gdev->ack_events_req));
|
|
vbg_req_free(gdev->cancel_req,
|
|
sizeof(*gdev->cancel_req));
|
|
vbg_req_free(gdev->mem_balloon.change_req,
|
|
sizeof(*gdev->mem_balloon.change_req));
|
|
vbg_req_free(gdev->mem_balloon.get_req,
|
|
sizeof(*gdev->mem_balloon.get_req));
|
|
}
|
|
|
|
/**
|
|
* Creates a VBoxGuest user session.
|
|
*
|
|
* vboxguest_linux.c calls this when userspace opens the char-device.
|
|
* Return: A pointer to the new session or an ERR_PTR on error.
|
|
* @gdev: The Guest extension device.
|
|
* @requestor: VMMDEV_REQUESTOR_* flags
|
|
*/
|
|
struct vbg_session *vbg_core_open_session(struct vbg_dev *gdev, u32 requestor)
|
|
{
|
|
struct vbg_session *session;
|
|
|
|
session = kzalloc(sizeof(*session), GFP_KERNEL);
|
|
if (!session)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
session->gdev = gdev;
|
|
session->requestor = requestor;
|
|
|
|
return session;
|
|
}
|
|
|
|
/**
|
|
* Closes a VBoxGuest session.
|
|
* @session: The session to close (and free).
|
|
*/
|
|
void vbg_core_close_session(struct vbg_session *session)
|
|
{
|
|
struct vbg_dev *gdev = session->gdev;
|
|
int i, rc;
|
|
|
|
vbg_set_session_capabilities(gdev, session, 0, U32_MAX, true);
|
|
vbg_set_session_event_filter(gdev, session, 0, U32_MAX, true);
|
|
|
|
for (i = 0; i < ARRAY_SIZE(session->hgcm_client_ids); i++) {
|
|
if (!session->hgcm_client_ids[i])
|
|
continue;
|
|
|
|
/* requestor is kernel here, as we're cleaning up. */
|
|
vbg_hgcm_disconnect(gdev, VBG_KERNEL_REQUEST,
|
|
session->hgcm_client_ids[i], &rc);
|
|
}
|
|
|
|
kfree(session);
|
|
}
|
|
|
|
static int vbg_ioctl_chk(struct vbg_ioctl_hdr *hdr, size_t in_size,
|
|
size_t out_size)
|
|
{
|
|
if (hdr->size_in != (sizeof(*hdr) + in_size) ||
|
|
hdr->size_out != (sizeof(*hdr) + out_size))
|
|
return -EINVAL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int vbg_ioctl_driver_version_info(
|
|
struct vbg_ioctl_driver_version_info *info)
|
|
{
|
|
const u16 vbg_maj_version = VBG_IOC_VERSION >> 16;
|
|
u16 min_maj_version, req_maj_version;
|
|
|
|
if (vbg_ioctl_chk(&info->hdr, sizeof(info->u.in), sizeof(info->u.out)))
|
|
return -EINVAL;
|
|
|
|
req_maj_version = info->u.in.req_version >> 16;
|
|
min_maj_version = info->u.in.min_version >> 16;
|
|
|
|
if (info->u.in.min_version > info->u.in.req_version ||
|
|
min_maj_version != req_maj_version)
|
|
return -EINVAL;
|
|
|
|
if (info->u.in.min_version <= VBG_IOC_VERSION &&
|
|
min_maj_version == vbg_maj_version) {
|
|
info->u.out.session_version = VBG_IOC_VERSION;
|
|
} else {
|
|
info->u.out.session_version = U32_MAX;
|
|
info->hdr.rc = VERR_VERSION_MISMATCH;
|
|
}
|
|
|
|
info->u.out.driver_version = VBG_IOC_VERSION;
|
|
info->u.out.driver_revision = 0;
|
|
info->u.out.reserved1 = 0;
|
|
info->u.out.reserved2 = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static bool vbg_wait_event_cond(struct vbg_dev *gdev,
|
|
struct vbg_session *session,
|
|
u32 event_mask)
|
|
{
|
|
unsigned long flags;
|
|
bool wakeup;
|
|
u32 events;
|
|
|
|
spin_lock_irqsave(&gdev->event_spinlock, flags);
|
|
|
|
events = gdev->pending_events & event_mask;
|
|
wakeup = events || session->cancel_waiters;
|
|
|
|
spin_unlock_irqrestore(&gdev->event_spinlock, flags);
|
|
|
|
return wakeup;
|
|
}
|
|
|
|
/* Must be called with the event_lock held */
|
|
static u32 vbg_consume_events_locked(struct vbg_dev *gdev,
|
|
struct vbg_session *session,
|
|
u32 event_mask)
|
|
{
|
|
u32 events = gdev->pending_events & event_mask;
|
|
|
|
gdev->pending_events &= ~events;
|
|
return events;
|
|
}
|
|
|
|
static int vbg_ioctl_wait_for_events(struct vbg_dev *gdev,
|
|
struct vbg_session *session,
|
|
struct vbg_ioctl_wait_for_events *wait)
|
|
{
|
|
u32 timeout_ms = wait->u.in.timeout_ms;
|
|
u32 event_mask = wait->u.in.events;
|
|
unsigned long flags;
|
|
long timeout;
|
|
int ret = 0;
|
|
|
|
if (vbg_ioctl_chk(&wait->hdr, sizeof(wait->u.in), sizeof(wait->u.out)))
|
|
return -EINVAL;
|
|
|
|
if (timeout_ms == U32_MAX)
|
|
timeout = MAX_SCHEDULE_TIMEOUT;
|
|
else
|
|
timeout = msecs_to_jiffies(timeout_ms);
|
|
|
|
wait->u.out.events = 0;
|
|
do {
|
|
timeout = wait_event_interruptible_timeout(
|
|
gdev->event_wq,
|
|
vbg_wait_event_cond(gdev, session, event_mask),
|
|
timeout);
|
|
|
|
spin_lock_irqsave(&gdev->event_spinlock, flags);
|
|
|
|
if (timeout < 0 || session->cancel_waiters) {
|
|
ret = -EINTR;
|
|
} else if (timeout == 0) {
|
|
ret = -ETIMEDOUT;
|
|
} else {
|
|
wait->u.out.events =
|
|
vbg_consume_events_locked(gdev, session, event_mask);
|
|
}
|
|
|
|
spin_unlock_irqrestore(&gdev->event_spinlock, flags);
|
|
|
|
/*
|
|
* Someone else may have consumed the event(s) first, in
|
|
* which case we go back to waiting.
|
|
*/
|
|
} while (ret == 0 && wait->u.out.events == 0);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int vbg_ioctl_interrupt_all_wait_events(struct vbg_dev *gdev,
|
|
struct vbg_session *session,
|
|
struct vbg_ioctl_hdr *hdr)
|
|
{
|
|
unsigned long flags;
|
|
|
|
if (hdr->size_in != sizeof(*hdr) || hdr->size_out != sizeof(*hdr))
|
|
return -EINVAL;
|
|
|
|
spin_lock_irqsave(&gdev->event_spinlock, flags);
|
|
session->cancel_waiters = true;
|
|
spin_unlock_irqrestore(&gdev->event_spinlock, flags);
|
|
|
|
wake_up(&gdev->event_wq);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Checks if the VMM request is allowed in the context of the given session.
|
|
* Return: 0 or negative errno value.
|
|
* @gdev: The Guest extension device.
|
|
* @session: The calling session.
|
|
* @req: The request.
|
|
*/
|
|
static int vbg_req_allowed(struct vbg_dev *gdev, struct vbg_session *session,
|
|
const struct vmmdev_request_header *req)
|
|
{
|
|
const struct vmmdev_guest_status *guest_status;
|
|
bool trusted_apps_only;
|
|
|
|
switch (req->request_type) {
|
|
/* Trusted users apps only. */
|
|
case VMMDEVREQ_QUERY_CREDENTIALS:
|
|
case VMMDEVREQ_REPORT_CREDENTIALS_JUDGEMENT:
|
|
case VMMDEVREQ_REGISTER_SHARED_MODULE:
|
|
case VMMDEVREQ_UNREGISTER_SHARED_MODULE:
|
|
case VMMDEVREQ_WRITE_COREDUMP:
|
|
case VMMDEVREQ_GET_CPU_HOTPLUG_REQ:
|
|
case VMMDEVREQ_SET_CPU_HOTPLUG_STATUS:
|
|
case VMMDEVREQ_CHECK_SHARED_MODULES:
|
|
case VMMDEVREQ_GET_PAGE_SHARING_STATUS:
|
|
case VMMDEVREQ_DEBUG_IS_PAGE_SHARED:
|
|
case VMMDEVREQ_REPORT_GUEST_STATS:
|
|
case VMMDEVREQ_REPORT_GUEST_USER_STATE:
|
|
case VMMDEVREQ_GET_STATISTICS_CHANGE_REQ:
|
|
trusted_apps_only = true;
|
|
break;
|
|
|
|
/* Anyone. */
|
|
case VMMDEVREQ_GET_MOUSE_STATUS:
|
|
case VMMDEVREQ_SET_MOUSE_STATUS:
|
|
case VMMDEVREQ_SET_POINTER_SHAPE:
|
|
case VMMDEVREQ_GET_HOST_VERSION:
|
|
case VMMDEVREQ_IDLE:
|
|
case VMMDEVREQ_GET_HOST_TIME:
|
|
case VMMDEVREQ_SET_POWER_STATUS:
|
|
case VMMDEVREQ_ACKNOWLEDGE_EVENTS:
|
|
case VMMDEVREQ_CTL_GUEST_FILTER_MASK:
|
|
case VMMDEVREQ_REPORT_GUEST_STATUS:
|
|
case VMMDEVREQ_GET_DISPLAY_CHANGE_REQ:
|
|
case VMMDEVREQ_VIDEMODE_SUPPORTED:
|
|
case VMMDEVREQ_GET_HEIGHT_REDUCTION:
|
|
case VMMDEVREQ_GET_DISPLAY_CHANGE_REQ2:
|
|
case VMMDEVREQ_VIDEMODE_SUPPORTED2:
|
|
case VMMDEVREQ_VIDEO_ACCEL_ENABLE:
|
|
case VMMDEVREQ_VIDEO_ACCEL_FLUSH:
|
|
case VMMDEVREQ_VIDEO_SET_VISIBLE_REGION:
|
|
case VMMDEVREQ_GET_DISPLAY_CHANGE_REQEX:
|
|
case VMMDEVREQ_GET_SEAMLESS_CHANGE_REQ:
|
|
case VMMDEVREQ_GET_VRDPCHANGE_REQ:
|
|
case VMMDEVREQ_LOG_STRING:
|
|
case VMMDEVREQ_GET_SESSION_ID:
|
|
trusted_apps_only = false;
|
|
break;
|
|
|
|
/* Depends on the request parameters... */
|
|
case VMMDEVREQ_REPORT_GUEST_CAPABILITIES:
|
|
guest_status = (const struct vmmdev_guest_status *)req;
|
|
switch (guest_status->facility) {
|
|
case VBOXGUEST_FACILITY_TYPE_ALL:
|
|
case VBOXGUEST_FACILITY_TYPE_VBOXGUEST_DRIVER:
|
|
vbg_err("Denying userspace vmm report guest cap. call facility %#08x\n",
|
|
guest_status->facility);
|
|
return -EPERM;
|
|
case VBOXGUEST_FACILITY_TYPE_VBOX_SERVICE:
|
|
trusted_apps_only = true;
|
|
break;
|
|
case VBOXGUEST_FACILITY_TYPE_VBOX_TRAY_CLIENT:
|
|
case VBOXGUEST_FACILITY_TYPE_SEAMLESS:
|
|
case VBOXGUEST_FACILITY_TYPE_GRAPHICS:
|
|
default:
|
|
trusted_apps_only = false;
|
|
break;
|
|
}
|
|
break;
|
|
|
|
/* Anything else is not allowed. */
|
|
default:
|
|
vbg_err("Denying userspace vmm call type %#08x\n",
|
|
req->request_type);
|
|
return -EPERM;
|
|
}
|
|
|
|
if (trusted_apps_only &&
|
|
(session->requestor & VMMDEV_REQUESTOR_USER_DEVICE)) {
|
|
vbg_err("Denying userspace vmm call type %#08x through vboxuser device node\n",
|
|
req->request_type);
|
|
return -EPERM;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int vbg_ioctl_vmmrequest(struct vbg_dev *gdev,
|
|
struct vbg_session *session, void *data)
|
|
{
|
|
struct vbg_ioctl_hdr *hdr = data;
|
|
int ret;
|
|
|
|
if (hdr->size_in != hdr->size_out)
|
|
return -EINVAL;
|
|
|
|
if (hdr->size_in > VMMDEV_MAX_VMMDEVREQ_SIZE)
|
|
return -E2BIG;
|
|
|
|
if (hdr->type == VBG_IOCTL_HDR_TYPE_DEFAULT)
|
|
return -EINVAL;
|
|
|
|
ret = vbg_req_allowed(gdev, session, data);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
vbg_req_perform(gdev, data);
|
|
WARN_ON(hdr->rc == VINF_HGCM_ASYNC_EXECUTE);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int vbg_ioctl_hgcm_connect(struct vbg_dev *gdev,
|
|
struct vbg_session *session,
|
|
struct vbg_ioctl_hgcm_connect *conn)
|
|
{
|
|
u32 client_id;
|
|
int i, ret;
|
|
|
|
if (vbg_ioctl_chk(&conn->hdr, sizeof(conn->u.in), sizeof(conn->u.out)))
|
|
return -EINVAL;
|
|
|
|
/* Find a free place in the sessions clients array and claim it */
|
|
mutex_lock(&gdev->session_mutex);
|
|
for (i = 0; i < ARRAY_SIZE(session->hgcm_client_ids); i++) {
|
|
if (!session->hgcm_client_ids[i]) {
|
|
session->hgcm_client_ids[i] = U32_MAX;
|
|
break;
|
|
}
|
|
}
|
|
mutex_unlock(&gdev->session_mutex);
|
|
|
|
if (i >= ARRAY_SIZE(session->hgcm_client_ids))
|
|
return -EMFILE;
|
|
|
|
ret = vbg_hgcm_connect(gdev, session->requestor, &conn->u.in.loc,
|
|
&client_id, &conn->hdr.rc);
|
|
|
|
mutex_lock(&gdev->session_mutex);
|
|
if (ret == 0 && conn->hdr.rc >= 0) {
|
|
conn->u.out.client_id = client_id;
|
|
session->hgcm_client_ids[i] = client_id;
|
|
} else {
|
|
conn->u.out.client_id = 0;
|
|
session->hgcm_client_ids[i] = 0;
|
|
}
|
|
mutex_unlock(&gdev->session_mutex);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int vbg_ioctl_hgcm_disconnect(struct vbg_dev *gdev,
|
|
struct vbg_session *session,
|
|
struct vbg_ioctl_hgcm_disconnect *disconn)
|
|
{
|
|
u32 client_id;
|
|
int i, ret;
|
|
|
|
if (vbg_ioctl_chk(&disconn->hdr, sizeof(disconn->u.in), 0))
|
|
return -EINVAL;
|
|
|
|
client_id = disconn->u.in.client_id;
|
|
if (client_id == 0 || client_id == U32_MAX)
|
|
return -EINVAL;
|
|
|
|
mutex_lock(&gdev->session_mutex);
|
|
for (i = 0; i < ARRAY_SIZE(session->hgcm_client_ids); i++) {
|
|
if (session->hgcm_client_ids[i] == client_id) {
|
|
session->hgcm_client_ids[i] = U32_MAX;
|
|
break;
|
|
}
|
|
}
|
|
mutex_unlock(&gdev->session_mutex);
|
|
|
|
if (i >= ARRAY_SIZE(session->hgcm_client_ids))
|
|
return -EINVAL;
|
|
|
|
ret = vbg_hgcm_disconnect(gdev, session->requestor, client_id,
|
|
&disconn->hdr.rc);
|
|
|
|
mutex_lock(&gdev->session_mutex);
|
|
if (ret == 0 && disconn->hdr.rc >= 0)
|
|
session->hgcm_client_ids[i] = 0;
|
|
else
|
|
session->hgcm_client_ids[i] = client_id;
|
|
mutex_unlock(&gdev->session_mutex);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static bool vbg_param_valid(enum vmmdev_hgcm_function_parameter_type type)
|
|
{
|
|
switch (type) {
|
|
case VMMDEV_HGCM_PARM_TYPE_32BIT:
|
|
case VMMDEV_HGCM_PARM_TYPE_64BIT:
|
|
case VMMDEV_HGCM_PARM_TYPE_LINADDR:
|
|
case VMMDEV_HGCM_PARM_TYPE_LINADDR_IN:
|
|
case VMMDEV_HGCM_PARM_TYPE_LINADDR_OUT:
|
|
return true;
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
|
|
static int vbg_ioctl_hgcm_call(struct vbg_dev *gdev,
|
|
struct vbg_session *session, bool f32bit,
|
|
struct vbg_ioctl_hgcm_call *call)
|
|
{
|
|
size_t actual_size;
|
|
u32 client_id;
|
|
int i, ret;
|
|
|
|
if (call->hdr.size_in < sizeof(*call))
|
|
return -EINVAL;
|
|
|
|
if (call->hdr.size_in != call->hdr.size_out)
|
|
return -EINVAL;
|
|
|
|
if (call->parm_count > VMMDEV_HGCM_MAX_PARMS)
|
|
return -E2BIG;
|
|
|
|
client_id = call->client_id;
|
|
if (client_id == 0 || client_id == U32_MAX)
|
|
return -EINVAL;
|
|
|
|
actual_size = sizeof(*call);
|
|
if (f32bit)
|
|
actual_size += call->parm_count *
|
|
sizeof(struct vmmdev_hgcm_function_parameter32);
|
|
else
|
|
actual_size += call->parm_count *
|
|
sizeof(struct vmmdev_hgcm_function_parameter);
|
|
if (call->hdr.size_in < actual_size) {
|
|
vbg_debug("VBG_IOCTL_HGCM_CALL: hdr.size_in %d required size is %zd\n",
|
|
call->hdr.size_in, actual_size);
|
|
return -EINVAL;
|
|
}
|
|
call->hdr.size_out = actual_size;
|
|
|
|
/* Validate parameter types */
|
|
if (f32bit) {
|
|
struct vmmdev_hgcm_function_parameter32 *parm =
|
|
VBG_IOCTL_HGCM_CALL_PARMS32(call);
|
|
|
|
for (i = 0; i < call->parm_count; i++)
|
|
if (!vbg_param_valid(parm[i].type))
|
|
return -EINVAL;
|
|
} else {
|
|
struct vmmdev_hgcm_function_parameter *parm =
|
|
VBG_IOCTL_HGCM_CALL_PARMS(call);
|
|
|
|
for (i = 0; i < call->parm_count; i++)
|
|
if (!vbg_param_valid(parm[i].type))
|
|
return -EINVAL;
|
|
}
|
|
|
|
/*
|
|
* Validate the client id.
|
|
*/
|
|
mutex_lock(&gdev->session_mutex);
|
|
for (i = 0; i < ARRAY_SIZE(session->hgcm_client_ids); i++)
|
|
if (session->hgcm_client_ids[i] == client_id)
|
|
break;
|
|
mutex_unlock(&gdev->session_mutex);
|
|
if (i >= ARRAY_SIZE(session->hgcm_client_ids)) {
|
|
vbg_debug("VBG_IOCTL_HGCM_CALL: INVALID handle. u32Client=%#08x\n",
|
|
client_id);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (IS_ENABLED(CONFIG_COMPAT) && f32bit)
|
|
ret = vbg_hgcm_call32(gdev, session->requestor, client_id,
|
|
call->function, call->timeout_ms,
|
|
VBG_IOCTL_HGCM_CALL_PARMS32(call),
|
|
call->parm_count, &call->hdr.rc);
|
|
else
|
|
ret = vbg_hgcm_call(gdev, session->requestor, client_id,
|
|
call->function, call->timeout_ms,
|
|
VBG_IOCTL_HGCM_CALL_PARMS(call),
|
|
call->parm_count, &call->hdr.rc);
|
|
|
|
if (ret == -E2BIG) {
|
|
/* E2BIG needs to be reported through the hdr.rc field. */
|
|
call->hdr.rc = VERR_OUT_OF_RANGE;
|
|
ret = 0;
|
|
}
|
|
|
|
if (ret && ret != -EINTR && ret != -ETIMEDOUT)
|
|
vbg_err("VBG_IOCTL_HGCM_CALL error: %d\n", ret);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int vbg_ioctl_log(struct vbg_ioctl_log *log)
|
|
{
|
|
if (log->hdr.size_out != sizeof(log->hdr))
|
|
return -EINVAL;
|
|
|
|
vbg_info("%.*s", (int)(log->hdr.size_in - sizeof(log->hdr)),
|
|
log->u.in.msg);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int vbg_ioctl_change_filter_mask(struct vbg_dev *gdev,
|
|
struct vbg_session *session,
|
|
struct vbg_ioctl_change_filter *filter)
|
|
{
|
|
u32 or_mask, not_mask;
|
|
|
|
if (vbg_ioctl_chk(&filter->hdr, sizeof(filter->u.in), 0))
|
|
return -EINVAL;
|
|
|
|
or_mask = filter->u.in.or_mask;
|
|
not_mask = filter->u.in.not_mask;
|
|
|
|
if ((or_mask | not_mask) & ~VMMDEV_EVENT_VALID_EVENT_MASK)
|
|
return -EINVAL;
|
|
|
|
return vbg_set_session_event_filter(gdev, session, or_mask, not_mask,
|
|
false);
|
|
}
|
|
|
|
static int vbg_ioctl_change_guest_capabilities(struct vbg_dev *gdev,
|
|
struct vbg_session *session, struct vbg_ioctl_set_guest_caps *caps)
|
|
{
|
|
u32 or_mask, not_mask;
|
|
int ret;
|
|
|
|
if (vbg_ioctl_chk(&caps->hdr, sizeof(caps->u.in), sizeof(caps->u.out)))
|
|
return -EINVAL;
|
|
|
|
or_mask = caps->u.in.or_mask;
|
|
not_mask = caps->u.in.not_mask;
|
|
|
|
if ((or_mask | not_mask) & ~VMMDEV_EVENT_VALID_EVENT_MASK)
|
|
return -EINVAL;
|
|
|
|
ret = vbg_set_session_capabilities(gdev, session, or_mask, not_mask,
|
|
false);
|
|
if (ret)
|
|
return ret;
|
|
|
|
caps->u.out.session_caps = session->guest_caps;
|
|
caps->u.out.global_caps = gdev->guest_caps_host;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int vbg_ioctl_check_balloon(struct vbg_dev *gdev,
|
|
struct vbg_ioctl_check_balloon *balloon_info)
|
|
{
|
|
if (vbg_ioctl_chk(&balloon_info->hdr, 0, sizeof(balloon_info->u.out)))
|
|
return -EINVAL;
|
|
|
|
balloon_info->u.out.balloon_chunks = gdev->mem_balloon.chunks;
|
|
/*
|
|
* Under Linux we handle VMMDEV_EVENT_BALLOON_CHANGE_REQUEST
|
|
* events entirely in the kernel, see vbg_core_isr().
|
|
*/
|
|
balloon_info->u.out.handle_in_r3 = false;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int vbg_ioctl_write_core_dump(struct vbg_dev *gdev,
|
|
struct vbg_session *session,
|
|
struct vbg_ioctl_write_coredump *dump)
|
|
{
|
|
struct vmmdev_write_core_dump *req;
|
|
|
|
if (vbg_ioctl_chk(&dump->hdr, sizeof(dump->u.in), 0))
|
|
return -EINVAL;
|
|
|
|
req = vbg_req_alloc(sizeof(*req), VMMDEVREQ_WRITE_COREDUMP,
|
|
session->requestor);
|
|
if (!req)
|
|
return -ENOMEM;
|
|
|
|
req->flags = dump->u.in.flags;
|
|
dump->hdr.rc = vbg_req_perform(gdev, req);
|
|
|
|
vbg_req_free(req, sizeof(*req));
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Common IOCtl for user to kernel communication.
|
|
* Return: 0 or negative errno value.
|
|
* @session: The client session.
|
|
* @req: The requested function.
|
|
* @data: The i/o data buffer, minimum size sizeof(struct vbg_ioctl_hdr).
|
|
*/
|
|
int vbg_core_ioctl(struct vbg_session *session, unsigned int req, void *data)
|
|
{
|
|
unsigned int req_no_size = req & ~IOCSIZE_MASK;
|
|
struct vbg_dev *gdev = session->gdev;
|
|
struct vbg_ioctl_hdr *hdr = data;
|
|
bool f32bit = false;
|
|
|
|
hdr->rc = VINF_SUCCESS;
|
|
if (!hdr->size_out)
|
|
hdr->size_out = hdr->size_in;
|
|
|
|
/*
|
|
* hdr->version and hdr->size_in / hdr->size_out minimum size are
|
|
* already checked by vbg_misc_device_ioctl().
|
|
*/
|
|
|
|
/* For VMMDEV_REQUEST hdr->type != VBG_IOCTL_HDR_TYPE_DEFAULT */
|
|
if (req_no_size == VBG_IOCTL_VMMDEV_REQUEST(0) ||
|
|
req == VBG_IOCTL_VMMDEV_REQUEST_BIG)
|
|
return vbg_ioctl_vmmrequest(gdev, session, data);
|
|
|
|
if (hdr->type != VBG_IOCTL_HDR_TYPE_DEFAULT)
|
|
return -EINVAL;
|
|
|
|
/* Fixed size requests. */
|
|
switch (req) {
|
|
case VBG_IOCTL_DRIVER_VERSION_INFO:
|
|
return vbg_ioctl_driver_version_info(data);
|
|
case VBG_IOCTL_HGCM_CONNECT:
|
|
return vbg_ioctl_hgcm_connect(gdev, session, data);
|
|
case VBG_IOCTL_HGCM_DISCONNECT:
|
|
return vbg_ioctl_hgcm_disconnect(gdev, session, data);
|
|
case VBG_IOCTL_WAIT_FOR_EVENTS:
|
|
return vbg_ioctl_wait_for_events(gdev, session, data);
|
|
case VBG_IOCTL_INTERRUPT_ALL_WAIT_FOR_EVENTS:
|
|
return vbg_ioctl_interrupt_all_wait_events(gdev, session, data);
|
|
case VBG_IOCTL_CHANGE_FILTER_MASK:
|
|
return vbg_ioctl_change_filter_mask(gdev, session, data);
|
|
case VBG_IOCTL_CHANGE_GUEST_CAPABILITIES:
|
|
return vbg_ioctl_change_guest_capabilities(gdev, session, data);
|
|
case VBG_IOCTL_CHECK_BALLOON:
|
|
return vbg_ioctl_check_balloon(gdev, data);
|
|
case VBG_IOCTL_WRITE_CORE_DUMP:
|
|
return vbg_ioctl_write_core_dump(gdev, session, data);
|
|
}
|
|
|
|
/* Variable sized requests. */
|
|
switch (req_no_size) {
|
|
#ifdef CONFIG_COMPAT
|
|
case VBG_IOCTL_HGCM_CALL_32(0):
|
|
f32bit = true;
|
|
#endif
|
|
/* Fall through */
|
|
case VBG_IOCTL_HGCM_CALL(0):
|
|
return vbg_ioctl_hgcm_call(gdev, session, f32bit, data);
|
|
case VBG_IOCTL_LOG(0):
|
|
return vbg_ioctl_log(data);
|
|
}
|
|
|
|
vbg_debug("VGDrvCommonIoCtl: Unknown req %#08x\n", req);
|
|
return -ENOTTY;
|
|
}
|
|
|
|
/**
|
|
* Report guest supported mouse-features to the host.
|
|
*
|
|
* Return: 0 or negative errno value.
|
|
* @gdev: The Guest extension device.
|
|
* @features: The set of features to report to the host.
|
|
*/
|
|
int vbg_core_set_mouse_status(struct vbg_dev *gdev, u32 features)
|
|
{
|
|
struct vmmdev_mouse_status *req;
|
|
int rc;
|
|
|
|
req = vbg_req_alloc(sizeof(*req), VMMDEVREQ_SET_MOUSE_STATUS,
|
|
VBG_KERNEL_REQUEST);
|
|
if (!req)
|
|
return -ENOMEM;
|
|
|
|
req->mouse_features = features;
|
|
req->pointer_pos_x = 0;
|
|
req->pointer_pos_y = 0;
|
|
|
|
rc = vbg_req_perform(gdev, req);
|
|
if (rc < 0)
|
|
vbg_err("%s error, rc: %d\n", __func__, rc);
|
|
|
|
vbg_req_free(req, sizeof(*req));
|
|
return vbg_status_code_to_errno(rc);
|
|
}
|
|
|
|
/** Core interrupt service routine. */
|
|
irqreturn_t vbg_core_isr(int irq, void *dev_id)
|
|
{
|
|
struct vbg_dev *gdev = dev_id;
|
|
struct vmmdev_events *req = gdev->ack_events_req;
|
|
bool mouse_position_changed = false;
|
|
unsigned long flags;
|
|
u32 events = 0;
|
|
int rc;
|
|
|
|
if (!gdev->mmio->V.V1_04.have_events)
|
|
return IRQ_NONE;
|
|
|
|
/* Get and acknowlegde events. */
|
|
req->header.rc = VERR_INTERNAL_ERROR;
|
|
req->events = 0;
|
|
rc = vbg_req_perform(gdev, req);
|
|
if (rc < 0) {
|
|
vbg_err("Error performing events req, rc: %d\n", rc);
|
|
return IRQ_NONE;
|
|
}
|
|
|
|
events = req->events;
|
|
|
|
if (events & VMMDEV_EVENT_MOUSE_POSITION_CHANGED) {
|
|
mouse_position_changed = true;
|
|
events &= ~VMMDEV_EVENT_MOUSE_POSITION_CHANGED;
|
|
}
|
|
|
|
if (events & VMMDEV_EVENT_HGCM) {
|
|
wake_up(&gdev->hgcm_wq);
|
|
events &= ~VMMDEV_EVENT_HGCM;
|
|
}
|
|
|
|
if (events & VMMDEV_EVENT_BALLOON_CHANGE_REQUEST) {
|
|
schedule_work(&gdev->mem_balloon.work);
|
|
events &= ~VMMDEV_EVENT_BALLOON_CHANGE_REQUEST;
|
|
}
|
|
|
|
if (events) {
|
|
spin_lock_irqsave(&gdev->event_spinlock, flags);
|
|
gdev->pending_events |= events;
|
|
spin_unlock_irqrestore(&gdev->event_spinlock, flags);
|
|
|
|
wake_up(&gdev->event_wq);
|
|
}
|
|
|
|
if (mouse_position_changed)
|
|
vbg_linux_mouse_event(gdev);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|