haraldwolff/qemu-patch-raspberry4
1
0
Fork 0
Code Issues Pull requests Packages Projects Releases Wiki Activity

Add a standard authorization framework

Browse source 
The current network services now support encryption via TLS and in some
 cases support authentication via SASL. In cases where SASL is not
 available, x509 client certificates can be used as a crude authorization
 scheme, but using a sub-CA and controlling who you give certs to. In
 general this is not very flexible though, so this series introduces a
 new standard authorization framework.
 
 It comes with four initial authorization mechanisms
 
  - Simple - an exact username match. This is useful when there is
    exactly one user that is known to connect. For example when live
    migrating from one QEMU to another with TLS, libvirt would use
    the simple scheme to whitelist the TLS cert of the source QEMU.
 
  - List - an full access control list, with optional regex matching.
    This is more flexible and is used to provide 100% backcompat with
    the existing HMP ACL commands. The caveat is that we can't create
    these via the CLI -object arg yet.
 
  - ListFile - the same as List, but with the rules stored in JSON
    format in an external file. This avoids the -object limitation
    while also allowing the admin to change list entries on the file.
    QEMU uses inotify to notice these changes and auto-reload the
    file contents. This is likely a good default choice for most
    network services, if the "simple" mechanism isn't sufficient.
 
  - PAM - delegate the username lookup to a PAM module, which opens
    the door to many options including things like SQL/LDAP lookups.
 -----BEGIN PGP SIGNATURE-----
 
 iQIcBAABCAAGBQJcdVxaAAoJEL6G67QVEE/fgK4P/jxF1aTzuc0N0jD7myNi2LE4
 aUqXueawNLrZKk8ZZQtEy/71/fTNJm9fVwxN9zIWITb4jTj4c3hqUnK1iVtEXXOR
 e0qZdKAsVAD2cpj9PBaihn84f+hrSF1ZnuMqtt4/kfOE9QPfLRpbqCNe+7JX5Z7z
 Cw8k+ATvm6Xc5QVEkc+8JTMft9lQaOdRJvldR2CVSqeFgIZWIrQ2NIG44m2GqO6b
 wqqUgmaMHd4cGJ4fgTn8G74GNzp4hpXzgTC9P881zC8qc+dKKJasTq1jSR3eWYKJ
 aE4Y+4EDjH/a0sP/zf97OfDzb/mGEpw8ng00g3o0qphFmSWMHVcoghB6wUZZcZGu
 VcGyoH+ztDdIcoD9HwVbkzMvYt9qrtMNrMUf3p1DRRNrrwcopSYnG6gZ9ArckgD4
 2VzxLrBbfS9tsWGAvOw/+c4SIxEzGQ0mcqHQeZONxLAi+zwkzuKVu973JBkvCBus
 aXpct8B2aMMxZeJ1ipWksj5PvAAEjhOquDqZrUtRiP7vg4156UiAhxW9x6hK//O1
 pof4jVBPZSYgrt3+PjADwK1fmPv01KkNa1dVi/Ew7fBJjGQNfJ12JlAYdSeoGG4i
 ds4OBbQH+Ko40++ZGu+n7xlk/0GQEw771c2GNDoA7ehHPg++S2yvrRoVVneyicur
 RYzwaPQ1nYrGAo3fAJEd
 =67pz
 -----END PGP SIGNATURE-----

Merge remote-tracking branch 'remotes/berrange/tags/authz-core-pull-request' into staging

Add a standard authorization framework

The current network services now support encryption via TLS and in some
cases support authentication via SASL. In cases where SASL is not
available, x509 client certificates can be used as a crude authorization
scheme, but using a sub-CA and controlling who you give certs to. In
general this is not very flexible though, so this series introduces a
new standard authorization framework.

It comes with four initial authorization mechanisms

 - Simple - an exact username match. This is useful when there is
   exactly one user that is known to connect. For example when live
   migrating from one QEMU to another with TLS, libvirt would use
   the simple scheme to whitelist the TLS cert of the source QEMU.

 - List - an full access control list, with optional regex matching.
   This is more flexible and is used to provide 100% backcompat with
   the existing HMP ACL commands. The caveat is that we can't create
   these via the CLI -object arg yet.

 - ListFile - the same as List, but with the rules stored in JSON
   format in an external file. This avoids the -object limitation
   while also allowing the admin to change list entries on the file.
   QEMU uses inotify to notice these changes and auto-reload the
   file contents. This is likely a good default choice for most
   network services, if the "simple" mechanism isn't sufficient.

 - PAM - delegate the username lookup to a PAM module, which opens
   the door to many options including things like SQL/LDAP lookups.

# gpg: Signature made Tue 26 Feb 2019 15:33:46 GMT
# gpg:                using RSA key BE86EBB415104FDF
# gpg: Good signature from "Daniel P. Berrange <dan@berrange.com>" [full]
# gpg:                 aka "Daniel P. Berrange <berrange@redhat.com>" [full]
# Primary key fingerprint: DAF3 A6FD B26B 6291 2D0E  8E3F BE86 EBB4 1510 4FDF

* remotes/berrange/tags/authz-core-pull-request:
  authz: delete existing ACL implementation
  authz: add QAuthZPAM object type for authorizing using PAM
  authz: add QAuthZListFile object type for a file access control list
  authz: add QAuthZList object type for an access control list
  authz: add QAuthZSimple object type for easy whitelist auth checks
  authz: add QAuthZ object as an authorization base class
  hw/usb: switch MTP to use new inotify APIs
  hw/usb: fix const-ness for string params in MTP driver
  hw/usb: don't set IN_ISDIR for inotify watch in MTP driver
  qom: don't require user creatable objects to be registered
  util: add helper APIs for dealing with inotify in portable manner

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Peter Maydell 2019-02-26 17:59:41 +00:00
parent d88d85f1f0 b76806d4ec
commit 86c7e2f4a9
49 changed files with 3782 additions and 572 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

15
MAINTAINERS
View file

@ -2079,6 +2079,14 @@ F: io/
F: include/io/
F: tests/test-io-*
User authorization
M: Daniel P. Berrange <berrange@redhat.com>
S: Maintained
F: authz/
F: qapi/authz.json
F: include/authz/
F: tests/test-authz-*
Sockets
M: Daniel P. Berrange <berrange@redhat.com>
M: Gerd Hoffmann <kraxel@redhat.com>
@ -2087,6 +2095,13 @@ F: include/qemu/sockets.h
F: util/qemu-sockets.c
F: qapi/sockets.json
File monitor
M: Daniel P. Berrange <berrange@redhat.com>
S: Odd fixes
F: util/filemonitor*.c
F: include/qemu/filemonitor.h
F: tests/test-util-filemonitor.c
Throttling infrastructure
M: Alberto Garcia <berto@igalia.com>
S: Supported

10
Makefile
View file

@ -359,6 +359,7 @@ endif
dummy := $(call unnest-vars,, \
stub-obj-y \
authz-obj-y \
chardev-obj-y \
util-obj-y \
qga-obj-y \
@ -423,6 +424,7 @@ qemu-options.def: $(SRC_PATH)/qemu-options.hx $(SRC_PATH)/scripts/hxtool
SUBDIR_RULES=$(patsubst %,subdir-%, $(TARGET_DIRS))
SOFTMMU_SUBDIR_RULES=$(filter %-softmmu,$(SUBDIR_RULES))
$(SOFTMMU_SUBDIR_RULES): $(authz-obj-y)
$(SOFTMMU_SUBDIR_RULES): $(block-obj-y)
$(SOFTMMU_SUBDIR_RULES): $(crypto-obj-y)
$(SOFTMMU_SUBDIR_RULES): $(io-obj-y)
@ -485,9 +487,9 @@ COMMON_LDADDS = libqemuutil.a
qemu-img.o: qemu-img-cmds.h
qemu-img$(EXESUF): qemu-img.o $(block-obj-y) $(crypto-obj-y) $(io-obj-y) $(qom-obj-y) $(COMMON_LDADDS)
qemu-nbd$(EXESUF): qemu-nbd.o $(block-obj-y) $(crypto-obj-y) $(io-obj-y) $(qom-obj-y) $(COMMON_LDADDS)
qemu-io$(EXESUF): qemu-io.o $(block-obj-y) $(crypto-obj-y) $(io-obj-y) $(qom-obj-y) $(COMMON_LDADDS)
qemu-img$(EXESUF): qemu-img.o $(authz-obj-y) $(block-obj-y) $(crypto-obj-y) $(io-obj-y) $(qom-obj-y) $(COMMON_LDADDS)
qemu-nbd$(EXESUF): qemu-nbd.o $(authz-obj-y) $(block-obj-y) $(crypto-obj-y) $(io-obj-y) $(qom-obj-y) $(COMMON_LDADDS)
qemu-io$(EXESUF): qemu-io.o $(authz-obj-y) $(block-obj-y) $(crypto-obj-y) $(io-obj-y) $(qom-obj-y) $(COMMON_LDADDS)
qemu-bridge-helper$(EXESUF): qemu-bridge-helper.o $(COMMON_LDADDS)
@ -498,7 +500,7 @@ qemu-edid$(EXESUF): qemu-edid.o hw/display/edid-generate.o $(COMMON_LDADDS)
fsdev/virtfs-proxy-helper$(EXESUF): fsdev/virtfs-proxy-helper.o fsdev/9p-marshal.o fsdev/9p-iov-marshal.o $(COMMON_LDADDS)
fsdev/virtfs-proxy-helper$(EXESUF): LIBS += -lcap
scsi/qemu-pr-helper$(EXESUF): scsi/qemu-pr-helper.o scsi/utils.o $(crypto-obj-y) $(io-obj-y) $(qom-obj-y) $(COMMON_LDADDS)
scsi/qemu-pr-helper$(EXESUF): scsi/qemu-pr-helper.o scsi/utils.o $(authz-obj-y) $(crypto-obj-y) $(io-obj-y) $(qom-obj-y) $(COMMON_LDADDS)
ifdef CONFIG_MPATH
scsi/qemu-pr-helper$(EXESUF): LIBS += -ludev -lmultipath -lmpathpersist
endif

8
Makefile.objs
View file

@ -1,11 +1,16 @@
#######################################################################
# Common libraries for tools and emulators
stub-obj-y = stubs/ crypto/
stub-obj-y = stubs/ util/ crypto/
util-obj-y = util/ qobject/ qapi/
chardev-obj-y = chardev/
slirp-obj-$(CONFIG_SLIRP) = slirp/
#######################################################################
# authz-obj-y is code used by both qemu system emulation and qemu-img
authz-obj-y = authz/
#######################################################################
# block-obj-y is code used by both qemu system emulation and qemu-img
@ -125,6 +130,7 @@ trace-events-subdirs =
trace-events-subdirs += accel/kvm
trace-events-subdirs += accel/tcg
trace-events-subdirs += audio
trace-events-subdirs += authz
trace-events-subdirs += block
trace-events-subdirs += chardev
trace-events-subdirs += crypto

2
Makefile.target
View file

@ -179,6 +179,7 @@ include $(SRC_PATH)/Makefile.objs
dummy := $(call unnest-vars,,target-obj-y)
target-obj-y-save := $(target-obj-y)
dummy := $(call unnest-vars,.., \
authz-obj-y \
block-obj-y \
block-obj-m \
chardev-obj-y \
@ -193,6 +194,7 @@ target-obj-y := $(target-obj-y-save)
all-obj-y += $(common-obj-y)
all-obj-y += $(target-obj-y)
all-obj-y += $(qom-obj-y)
all-obj-$(CONFIG_SOFTMMU) += $(authz-obj-y)
all-obj-$(CONFIG_SOFTMMU) += $(block-obj-y) $(chardev-obj-y)
all-obj-$(CONFIG_USER_ONLY) += $(crypto-aes-obj-y)
all-obj-$(CONFIG_SOFTMMU) += $(crypto-obj-y)

7
authz/Makefile.objs Normal file
View file

@ -0,0 +1,7 @@
authz-obj-y += base.o
authz-obj-y += simple.o
authz-obj-y += list.o
authz-obj-y += listfile.o
authz-obj-$(CONFIG_AUTH_PAM) += pamacct.o
pamacct.o-libs = -lpam

82
authz/base.c Normal file
View file

@ -0,0 +1,82 @@
/*
* QEMU authorization framework base class
*
* Copyright (c) 2018 Red Hat, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*
*/
#include "qemu/osdep.h"
#include "authz/base.h"
#include "authz/trace.h"
bool qauthz_is_allowed(QAuthZ *authz,
const char *identity,
Error **errp)
{
QAuthZClass *cls = QAUTHZ_GET_CLASS(authz);
bool allowed;
allowed = cls->is_allowed(authz, identity, errp);
trace_qauthz_is_allowed(authz, identity, allowed);
return allowed;
}
bool qauthz_is_allowed_by_id(const char *authzid,
const char *identity,
Error **errp)
{
QAuthZ *authz;
Object *obj;
Object *container;
container = object_get_objects_root();
obj = object_resolve_path_component(container,
authzid);
if (!obj) {
error_setg(errp, "Cannot find QAuthZ object ID %s",
authzid);
return false;
}
if (!object_dynamic_cast(obj, TYPE_QAUTHZ)) {
error_setg(errp, "Object '%s' is not a QAuthZ subclass",
authzid);
return false;
}
authz = QAUTHZ(obj);
return qauthz_is_allowed(authz, identity, errp);
}
static const TypeInfo authz_info = {
.parent = TYPE_OBJECT,
.name = TYPE_QAUTHZ,
.instance_size = sizeof(QAuthZ),
.class_size = sizeof(QAuthZClass),
.abstract = true,
};
static void qauthz_register_types(void)
{
type_register_static(&authz_info);
}
type_init(qauthz_register_types)

271
authz/list.c Normal file
View file

@ -0,0 +1,271 @@
/*
* QEMU access control list authorization driver
*
* Copyright (c) 2018 Red Hat, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*
*/
#include "qemu/osdep.h"
#include "authz/list.h"
#include "authz/trace.h"
#include "qom/object_interfaces.h"
#include "qapi/qapi-visit-authz.h"
static bool qauthz_list_is_allowed(QAuthZ *authz,
const char *identity,
Error **errp)
{
QAuthZList *lauthz = QAUTHZ_LIST(authz);
QAuthZListRuleList *rules = lauthz->rules;
while (rules) {
QAuthZListRule *rule = rules->value;
QAuthZListFormat format = rule->has_format ? rule->format :
QAUTHZ_LIST_FORMAT_EXACT;
trace_qauthz_list_check_rule(authz, rule->match, identity,
format, rule->policy);
switch (format) {
case QAUTHZ_LIST_FORMAT_EXACT:
if (g_str_equal(rule->match, identity)) {
return rule->policy == QAUTHZ_LIST_POLICY_ALLOW;
}
break;
case QAUTHZ_LIST_FORMAT_GLOB:
if (g_pattern_match_simple(rule->match, identity)) {
return rule->policy == QAUTHZ_LIST_POLICY_ALLOW;
}
break;
default:
g_warn_if_reached();
return false;
}
rules = rules->next;
}
trace_qauthz_list_default_policy(authz, identity, lauthz->policy);
return lauthz->policy == QAUTHZ_LIST_POLICY_ALLOW;
}
static void
qauthz_list_prop_set_policy(Object *obj,
int value,
Error **errp G_GNUC_UNUSED)
{
QAuthZList *lauthz = QAUTHZ_LIST(obj);
lauthz->policy = value;
}
static int
qauthz_list_prop_get_policy(Object *obj,
Error **errp G_GNUC_UNUSED)
{
QAuthZList *lauthz = QAUTHZ_LIST(obj);
return lauthz->policy;
}
static void
qauthz_list_prop_get_rules(Object *obj, Visitor *v, const char *name,
void *opaque, Error **errp)
{
QAuthZList *lauthz = QAUTHZ_LIST(obj);
visit_type_QAuthZListRuleList(v, name, &lauthz->rules, errp);
}
static void
qauthz_list_prop_set_rules(Object *obj, Visitor *v, const char *name,
void *opaque, Error **errp)
{
QAuthZList *lauthz = QAUTHZ_LIST(obj);
QAuthZListRuleList *oldrules;
oldrules = lauthz->rules;
visit_type_QAuthZListRuleList(v, name, &lauthz->rules, errp);
qapi_free_QAuthZListRuleList(oldrules);
}
static void
qauthz_list_finalize(Object *obj)
{
QAuthZList *lauthz = QAUTHZ_LIST(obj);
qapi_free_QAuthZListRuleList(lauthz->rules);
}
static void
qauthz_list_class_init(ObjectClass *oc, void *data)
{
QAuthZClass *authz = QAUTHZ_CLASS(oc);
object_class_property_add_enum(oc, "policy",
"QAuthZListPolicy",
&QAuthZListPolicy_lookup,
qauthz_list_prop_get_policy,
qauthz_list_prop_set_policy,
NULL);
object_class_property_add(oc, "rules", "QAuthZListRule",
qauthz_list_prop_get_rules,
qauthz_list_prop_set_rules,
NULL, NULL, NULL);
authz->is_allowed = qauthz_list_is_allowed;
}
QAuthZList *qauthz_list_new(const char *id,
QAuthZListPolicy policy,
Error **errp)
{
return QAUTHZ_LIST(
object_new_with_props(TYPE_QAUTHZ_LIST,
object_get_objects_root(),
id, errp,
"policy", QAuthZListPolicy_str(policy),
NULL));
}
ssize_t qauthz_list_append_rule(QAuthZList *auth,
const char *match,
QAuthZListPolicy policy,
QAuthZListFormat format,
Error **errp)
{
QAuthZListRule *rule;
QAuthZListRuleList *rules, *tmp;
size_t i = 0;
rule = g_new0(QAuthZListRule, 1);
rule->policy = policy;
rule->match = g_strdup(match);
rule->format = format;
rule->has_format = true;
tmp = g_new0(QAuthZListRuleList, 1);
tmp->value = rule;
rules = auth->rules;
if (rules) {
while (rules->next) {
i++;
rules = rules->next;
}
rules->next = tmp;
return i + 1;
} else {
auth->rules = tmp;
return 0;
}
}
ssize_t qauthz_list_insert_rule(QAuthZList *auth,
const char *match,
QAuthZListPolicy policy,
QAuthZListFormat format,
size_t index,
Error **errp)
{
QAuthZListRule *rule;
QAuthZListRuleList *rules, *tmp;
size_t i = 0;
rule = g_new0(QAuthZListRule, 1);
rule->policy = policy;
rule->match = g_strdup(match);
rule->format = format;
rule->has_format = true;
tmp = g_new0(QAuthZListRuleList, 1);
tmp->value = rule;
rules = auth->rules;
if (rules && index > 0) {
while (rules->next && i < (index - 1)) {
i++;
rules = rules->next;
}
tmp->next = rules->next;
rules->next = tmp;
return i + 1;
} else {
tmp->next = auth->rules;
auth->rules = tmp;
return 0;
}
}
ssize_t qauthz_list_delete_rule(QAuthZList *auth, const char *match)
{
QAuthZListRule *rule;
QAuthZListRuleList *rules, *prev;
size_t i = 0;
prev = NULL;
rules = auth->rules;
while (rules) {
rule = rules->value;
if (g_str_equal(rule->match, match)) {
if (prev) {
prev->next = rules->next;
} else {
auth->rules = rules->next;
}
rules->next = NULL;
qapi_free_QAuthZListRuleList(rules);
return i;
}
prev = rules;
rules = rules->next;
i++;
}
return -1;
}
static const TypeInfo qauthz_list_info = {
.parent = TYPE_QAUTHZ,
.name = TYPE_QAUTHZ_LIST,
.instance_size = sizeof(QAuthZList),
.instance_finalize = qauthz_list_finalize,
.class_size = sizeof(QAuthZListClass),
.class_init = qauthz_list_class_init,
.interfaces = (InterfaceInfo[]) {
{ TYPE_USER_CREATABLE },
{ }
}
};
static void
qauthz_list_register_types(void)
{
type_register_static(&qauthz_list_info);
}
type_init(qauthz_list_register_types);

283
authz/listfile.c Normal file
View file

@ -0,0 +1,283 @@
/*
* QEMU access control list file authorization driver
*
* Copyright (c) 2018 Red Hat, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*
*/
#include "qemu/osdep.h"
#include "authz/listfile.h"
#include "authz/trace.h"
#include "qemu/error-report.h"
#include "qemu/main-loop.h"
#include "qemu/sockets.h"
#include "qemu/filemonitor.h"
#include "qom/object_interfaces.h"
#include "qapi/qapi-visit-authz.h"
#include "qapi/qmp/qjson.h"
#include "qapi/qmp/qobject.h"
#include "qapi/qmp/qerror.h"
#include "qapi/qobject-input-visitor.h"
static bool
qauthz_list_file_is_allowed(QAuthZ *authz,
const char *identity,
Error **errp)
{
QAuthZListFile *fauthz = QAUTHZ_LIST_FILE(authz);
if (fauthz->list) {
return qauthz_is_allowed(fauthz->list, identity, errp);
}
return false;
}
static QAuthZ *
qauthz_list_file_load(QAuthZListFile *fauthz, Error **errp)
{
GError *err = NULL;
gchar *content = NULL;
gsize len;
QObject *obj = NULL;
QDict *pdict;
Visitor *v = NULL;
QAuthZ *ret = NULL;
trace_qauthz_list_file_load(fauthz, fauthz->filename);
if (!g_file_get_contents(fauthz->filename, &content, &len, &err)) {
error_setg(errp, "Unable to read '%s': %s",
fauthz->filename, err->message);
goto cleanup;
}
obj = qobject_from_json(content, errp);
if (!obj) {
goto cleanup;
}
pdict = qobject_to(QDict, obj);
if (!pdict) {
error_setg(errp, QERR_INVALID_PARAMETER_TYPE, "obj", "dict");
goto cleanup;
}
v = qobject_input_visitor_new(obj);
ret = (QAuthZ *)user_creatable_add_type(TYPE_QAUTHZ_LIST,
NULL, pdict, v, errp);
cleanup:
visit_free(v);
qobject_unref(obj);
if (err) {
g_error_free(err);
}
g_free(content);
return ret;
}
static void
qauthz_list_file_event(int wd G_GNUC_UNUSED,
QFileMonitorEvent ev G_GNUC_UNUSED,
const char *name G_GNUC_UNUSED,
void *opaque)
{
QAuthZListFile *fauthz = opaque;
Error *err = NULL;
if (ev != QFILE_MONITOR_EVENT_MODIFIED &&
ev != QFILE_MONITOR_EVENT_CREATED) {
return;
}
object_unref(OBJECT(fauthz->list));
fauthz->list = qauthz_list_file_load(fauthz, &err);
trace_qauthz_list_file_refresh(fauthz,
fauthz->filename, fauthz->list ? 1 : 0);
if (!fauthz->list) {
error_report_err(err);
}
}
static void
qauthz_list_file_complete(UserCreatable *uc, Error **errp)
{
QAuthZListFile *fauthz = QAUTHZ_LIST_FILE(uc);
gchar *dir = NULL, *file = NULL;
fauthz->list = qauthz_list_file_load(fauthz, errp);
if (!fauthz->refresh) {
return;
}
fauthz->file_monitor = qemu_file_monitor_new(errp);
if (!fauthz->file_monitor) {
return;
}
dir = g_path_get_dirname(fauthz->filename);
if (g_str_equal(dir, ".")) {
error_setg(errp, "Filename must be an absolute path");
goto cleanup;
}
file = g_path_get_basename(fauthz->filename);
if (g_str_equal(file, ".")) {
error_setg(errp, "Path has no trailing filename component");
goto cleanup;
}
fauthz->file_watch = qemu_file_monitor_add_watch(
fauthz->file_monitor, dir, file,
qauthz_list_file_event, fauthz, errp);
if (fauthz->file_watch < 0) {
goto cleanup;
}
cleanup:
g_free(file);
g_free(dir);
}
static void
qauthz_list_file_prop_set_filename(Object *obj,
const char *value,
Error **errp G_GNUC_UNUSED)
{
QAuthZListFile *fauthz = QAUTHZ_LIST_FILE(obj);
g_free(fauthz->filename);
fauthz->filename = g_strdup(value);
}
static char *
qauthz_list_file_prop_get_filename(Object *obj,
Error **errp G_GNUC_UNUSED)
{
QAuthZListFile *fauthz = QAUTHZ_LIST_FILE(obj);
return g_strdup(fauthz->filename);
}
static void
qauthz_list_file_prop_set_refresh(Object *obj,
bool value,
Error **errp G_GNUC_UNUSED)
{
QAuthZListFile *fauthz = QAUTHZ_LIST_FILE(obj);
fauthz->refresh = value;
}
static bool
qauthz_list_file_prop_get_refresh(Object *obj,
Error **errp G_GNUC_UNUSED)
{
QAuthZListFile *fauthz = QAUTHZ_LIST_FILE(obj);
return fauthz->refresh;
}
static void
qauthz_list_file_finalize(Object *obj)
{
QAuthZListFile *fauthz = QAUTHZ_LIST_FILE(obj);
object_unref(OBJECT(fauthz->list));
g_free(fauthz->filename);
qemu_file_monitor_free(fauthz->file_monitor);
}
static void
qauthz_list_file_class_init(ObjectClass *oc, void *data)
{
UserCreatableClass *ucc = USER_CREATABLE_CLASS(oc);
QAuthZClass *authz = QAUTHZ_CLASS(oc);
ucc->complete = qauthz_list_file_complete;
object_class_property_add_str(oc, "filename",
qauthz_list_file_prop_get_filename,
qauthz_list_file_prop_set_filename,
NULL);
object_class_property_add_bool(oc, "refresh",
qauthz_list_file_prop_get_refresh,
qauthz_list_file_prop_set_refresh,
NULL);
authz->is_allowed = qauthz_list_file_is_allowed;
}
static void
qauthz_list_file_init(Object *obj)
{
QAuthZListFile *authz = QAUTHZ_LIST_FILE(obj);
authz->file_watch = -1;
#ifdef CONFIG_INOTIFY1
authz->refresh = TRUE;
#endif
}
QAuthZListFile *qauthz_list_file_new(const char *id,
const char *filename,
bool refresh,
Error **errp)
{
return QAUTHZ_LIST_FILE(
object_new_with_props(TYPE_QAUTHZ_LIST_FILE,
object_get_objects_root(),
id, errp,
"filename", filename,
"refresh", refresh ? "yes" : "no",
NULL));
}
static const TypeInfo qauthz_list_file_info = {
.parent = TYPE_QAUTHZ,
.name = TYPE_QAUTHZ_LIST_FILE,
.instance_init = qauthz_list_file_init,
.instance_size = sizeof(QAuthZListFile),
.instance_finalize = qauthz_list_file_finalize,
.class_size = sizeof(QAuthZListFileClass),
.class_init = qauthz_list_file_class_init,
.interfaces = (InterfaceInfo[]) {
{ TYPE_USER_CREATABLE },
{ }
}
};
static void
qauthz_list_file_register_types(void)
{
type_register_static(&qauthz_list_file_info);
}
type_init(qauthz_list_file_register_types);

148
authz/pamacct.c Normal file
View file

@ -0,0 +1,148 @@
/*
* QEMU PAM authorization driver
*
* Copyright (c) 2018 Red Hat, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*
*/
#include "qemu/osdep.h"
#include "authz/pamacct.h"
#include "authz/trace.h"
#include "qom/object_interfaces.h"
#include <security/pam_appl.h>
static bool qauthz_pam_is_allowed(QAuthZ *authz,
const char *identity,
Error **errp)
{
QAuthZPAM *pauthz = QAUTHZ_PAM(authz);
const struct pam_conv pam_conversation = { 0 };
pam_handle_t *pamh = NULL;
int ret;
trace_qauthz_pam_check(authz, identity, pauthz->service);
ret = pam_start(pauthz->service,
identity,
&pam_conversation,
&pamh);
if (ret != PAM_SUCCESS) {
error_setg(errp, "Unable to start PAM transaction: %s",
pam_strerror(NULL, ret));
return false;
}
ret = pam_acct_mgmt(pamh, PAM_SILENT);
pam_end(pamh, ret);
if (ret != PAM_SUCCESS) {
error_setg(errp, "Unable to authorize user '%s': %s",
identity, pam_strerror(pamh, ret));
return false;
}
return true;
}
static void
qauthz_pam_prop_set_service(Object *obj,
const char *service,
Error **errp G_GNUC_UNUSED)
{
QAuthZPAM *pauthz = QAUTHZ_PAM(obj);
g_free(pauthz->service);
pauthz->service = g_strdup(service);
}
static char *
qauthz_pam_prop_get_service(Object *obj,
Error **errp G_GNUC_UNUSED)
{
QAuthZPAM *pauthz = QAUTHZ_PAM(obj);
return g_strdup(pauthz->service);
}
static void
qauthz_pam_complete(UserCreatable *uc, Error **errp)
{
}
static void
qauthz_pam_finalize(Object *obj)
{
QAuthZPAM *pauthz = QAUTHZ_PAM(obj);
g_free(pauthz->service);
}
static void
qauthz_pam_class_init(ObjectClass *oc, void *data)
{
UserCreatableClass *ucc = USER_CREATABLE_CLASS(oc);
QAuthZClass *authz = QAUTHZ_CLASS(oc);
ucc->complete = qauthz_pam_complete;
authz->is_allowed = qauthz_pam_is_allowed;
object_class_property_add_str(oc, "service",
qauthz_pam_prop_get_service,
qauthz_pam_prop_set_service,
NULL);
}
QAuthZPAM *qauthz_pam_new(const char *id,
const char *service,
Error **errp)
{
return QAUTHZ_PAM(
object_new_with_props(TYPE_QAUTHZ_PAM,
object_get_objects_root(),
id, errp,
"service", service,
NULL));
}
static const TypeInfo qauthz_pam_info = {
.parent = TYPE_QAUTHZ,
.name = TYPE_QAUTHZ_PAM,
.instance_size = sizeof(QAuthZPAM),
.instance_finalize = qauthz_pam_finalize,
.class_size = sizeof(QAuthZPAMClass),
.class_init = qauthz_pam_class_init,
.interfaces = (InterfaceInfo[]) {
{ TYPE_USER_CREATABLE },
{ }
}
};
static void
qauthz_pam_register_types(void)
{
type_register_static(&qauthz_pam_info);
}
type_init(qauthz_pam_register_types);

115
authz/simple.c Normal file
View file

@ -0,0 +1,115 @@
/*
* QEMU simple authorization driver
*
* Copyright (c) 2018 Red Hat, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*
*/
#include "qemu/osdep.h"
#include "authz/simple.h"
#include "authz/trace.h"
#include "qom/object_interfaces.h"
static bool qauthz_simple_is_allowed(QAuthZ *authz,
const char *identity,
Error **errp)
{
QAuthZSimple *sauthz = QAUTHZ_SIMPLE(authz);
trace_qauthz_simple_is_allowed(authz, sauthz->identity, identity);
return g_str_equal(identity, sauthz->identity);
}
static void
qauthz_simple_prop_set_identity(Object *obj,
const char *value,
Error **errp G_GNUC_UNUSED)
{
QAuthZSimple *sauthz = QAUTHZ_SIMPLE(obj);
g_free(sauthz->identity);
sauthz->identity = g_strdup(value);
}
static char *
qauthz_simple_prop_get_identity(Object *obj,
Error **errp G_GNUC_UNUSED)
{
QAuthZSimple *sauthz = QAUTHZ_SIMPLE(obj);
return g_strdup(sauthz->identity);
}
static void
qauthz_simple_finalize(Object *obj)
{
QAuthZSimple *sauthz = QAUTHZ_SIMPLE(obj);
g_free(sauthz->identity);
}
static void
qauthz_simple_class_init(ObjectClass *oc, void *data)
{
QAuthZClass *authz = QAUTHZ_CLASS(oc);
authz->is_allowed = qauthz_simple_is_allowed;
object_class_property_add_str(oc, "identity",
qauthz_simple_prop_get_identity,
qauthz_simple_prop_set_identity,
NULL);
}
QAuthZSimple *qauthz_simple_new(const char *id,
const char *identity,
Error **errp)
{
return QAUTHZ_SIMPLE(
object_new_with_props(TYPE_QAUTHZ_SIMPLE,
object_get_objects_root(),
id, errp,
"identity", identity,
NULL));
}
static const TypeInfo qauthz_simple_info = {
.parent = TYPE_QAUTHZ,
.name = TYPE_QAUTHZ_SIMPLE,
.instance_size = sizeof(QAuthZSimple),
.instance_finalize = qauthz_simple_finalize,
.class_size = sizeof(QAuthZSimpleClass),
.class_init = qauthz_simple_class_init,
.interfaces = (InterfaceInfo[]) {
{ TYPE_USER_CREATABLE },
{ }
}
};
static void
qauthz_simple_register_types(void)
{
type_register_static(&qauthz_simple_info);
}
type_init(qauthz_simple_register_types);

18
authz/trace-events Normal file
View file

@ -0,0 +1,18 @@
# See docs/devel/tracing.txt for syntax documentation.
# authz/base.c
qauthz_is_allowed(void *authz, const char *identity, bool allowed) "AuthZ %p check identity=%s allowed=%d"
# auth/simple.c
qauthz_simple_is_allowed(void *authz, const char *wantidentity, const char *gotidentity) "AuthZ simple %p check want identity=%s got identity=%s"
# auth/list.c
qauthz_list_check_rule(void *authz, const char *identity, const char *rule, int format, int policy) "AuthZ list %p check rule=%s identity=%s format=%d policy=%d"
qauthz_list_default_policy(void *authz, const char *identity, int policy) "AuthZ list %p default identity=%s policy=%d"
# auth/listfile.c
qauthz_list_file_load(void *authz, const char *filename) "AuthZ file %p load filename=%s"
qauthz_list_file_refresh(void *authz, const char *filename, int success) "AuthZ file %p load filename=%s success=%d"
# auth/pam.c
qauthz_pam_check(void *authz, const char *identity, const char *service) "AuthZ PAM %p identity=%s service=%s"

54
configure vendored
View file

@ -463,6 +463,7 @@ gnutls=""
nettle=""
gcrypt=""
gcrypt_hmac="no"
auth_pam=""
vte=""
virglrenderer=""
tpm="yes"
@ -1381,6 +1382,10 @@ for opt do
;;
--enable-gcrypt) gcrypt="yes"
;;
--disable-auth-pam) auth_pam="no"
;;
--enable-auth-pam) auth_pam="yes"
;;
--enable-rdma) rdma="yes"
;;
--disable-rdma) rdma="no"
@ -1707,6 +1712,7 @@ disabled with --disable-FEATURE, default is enabled if available:
gnutls GNUTLS cryptography support
nettle nettle cryptography support
gcrypt libgcrypt cryptography support
auth-pam PAM access control
sdl SDL UI
sdl_image SDL Image support for icons
gtk gtk UI
@ -2864,6 +2870,33 @@ else
fi
##########################################
# PAM probe
if test "$auth_pam" != "no"; then
cat > $TMPC <<EOF
#include <security/pam_appl.h>
#include <stdio.h>
int main(void) {
const char *service_name = "qemu";
const char *user = "frank";
const struct pam_conv *pam_conv = NULL;
pam_handle_t *pamh = NULL;
pam_start(service_name, user, pam_conv, &pamh);
return 0;
}
EOF
if compile_prog "" "-lpam" ; then
auth_pam=yes
else
if test "$auth_pam" = "yes"; then
feature_not_found "PAM" "Install PAM development package"
else
auth_pam=no
fi
fi
fi
##########################################
# getifaddrs (for tests/test-io-channel-socket )
@ -3172,20 +3205,6 @@ if test "$xkbcommon" != "no" ; then
fi
fi
##########################################
# fnmatch() probe, used for ACL routines
fnmatch="no"
cat > $TMPC << EOF
#include <fnmatch.h>
int main(void)
{
fnmatch("foo", "foo", 0);
return 0;
}
EOF
if compile_prog "" "" ; then
fnmatch="yes"
fi
##########################################
# xfsctl() probe, used for file-posix.c
@ -6091,6 +6110,7 @@ echo "GNUTLS support $gnutls"
echo "libgcrypt $gcrypt"
echo "nettle $nettle $(echo_version $nettle $nettle_version)"
echo "libtasn1 $tasn1"
echo "PAM $auth_pam"
echo "curses support $curses"
echo "virgl support $virglrenderer $(echo_version $virglrenderer $virgl_version)"
echo "curl support $curl"
@ -6382,9 +6402,6 @@ if test "$xkbcommon" = "yes" ; then
echo "XKBCOMMON_CFLAGS=$xkbcommon_cflags" >> $config_host_mak
echo "XKBCOMMON_LIBS=$xkbcommon_libs" >> $config_host_mak
fi
if test "$fnmatch" = "yes" ; then
echo "CONFIG_FNMATCH=y" >> $config_host_mak
fi
if test "$xfs" = "yes" ; then
echo "CONFIG_XFS=y" >> $config_host_mak
fi
@ -6550,6 +6567,9 @@ fi
if test "$tasn1" = "yes" ; then
echo "CONFIG_TASN1=y" >> $config_host_mak
fi
if test "$auth_pam" = "yes" ; then
echo "CONFIG_AUTH_PAM=y" >> $config_host_mak
fi
if test "$have_ifaddrs_h" = "yes" ; then
echo "HAVE_IFADDRS_H=y" >> $config_host_mak
fi

35
crypto/tlssession.c
View file

@ -24,7 +24,7 @@
#include "crypto/tlscredspsk.h"
#include "crypto/tlscredsx509.h"
#include "qapi/error.h"
#include "qemu/acl.h"
#include "authz/base.h"
#include "trace.h"
#ifdef CONFIG_GNUTLS
@ -37,7 +37,7 @@ struct QCryptoTLSSession {
QCryptoTLSCreds *creds;
gnutls_session_t handle;
char *hostname;
char *aclname;
char *authzid;
bool handshakeComplete;
QCryptoTLSSessionWriteFunc writeFunc;
QCryptoTLSSessionReadFunc readFunc;
@ -56,7 +56,7 @@ qcrypto_tls_session_free(QCryptoTLSSession *session)
gnutls_deinit(session->handle);
g_free(session->hostname);
g_free(session->peername);
g_free(session->aclname);
g_free(session->authzid);
object_unref(OBJECT(session->creds));
g_free(session);
}
@ -95,7 +95,7 @@ qcrypto_tls_session_pull(void *opaque, void *buf, size_t len)
QCryptoTLSSession *
qcrypto_tls_session_new(QCryptoTLSCreds *creds,
const char *hostname,
const char *aclname,
const char *authzid,
QCryptoTLSCredsEndpoint endpoint,
Error **errp)
{
@ -105,13 +105,13 @@ qcrypto_tls_session_new(QCryptoTLSCreds *creds,
session = g_new0(QCryptoTLSSession, 1);
trace_qcrypto_tls_session_new(
session, creds, hostname ? hostname : "<none>",
aclname ? aclname : "<none>", endpoint);
authzid ? authzid : "<none>", endpoint);
if (hostname) {
session->hostname = g_strdup(hostname);
}
if (aclname) {
session->aclname = g_strdup(aclname);
if (authzid) {
session->authzid = g_strdup(authzid);
}
session->creds = creds;
object_ref(OBJECT(creds));
@ -262,6 +262,7 @@ qcrypto_tls_session_check_certificate(QCryptoTLSSession *session,
unsigned int nCerts, i;
time_t now;
gnutls_x509_crt_t cert = NULL;
Error *err = NULL;
now = time(NULL);
if (now == ((time_t)-1)) {
@ -349,19 +350,17 @@ qcrypto_tls_session_check_certificate(QCryptoTLSSession *session,
gnutls_strerror(ret));
goto error;
}
if (session->aclname) {
qemu_acl *acl = qemu_acl_find(session->aclname);
int allow;
if (!acl) {
error_setg(errp, "Cannot find ACL %s",
session->aclname);
if (session->authzid) {
bool allow;
allow = qauthz_is_allowed_by_id(session->authzid,
session->peername, &err);
if (err) {
error_propagate(errp, err);
goto error;
}
allow = qemu_acl_party_is_allowed(acl, session->peername);
if (!allow) {
error_setg(errp, "TLS x509 ACL check for %s is denied",
error_setg(errp, "TLS x509 authz check for %s is denied",
session->peername);
goto error;
}
@ -555,7 +554,7 @@ qcrypto_tls_session_get_peer_name(QCryptoTLSSession *session)
QCryptoTLSSession *
qcrypto_tls_session_new(QCryptoTLSCreds *creds G_GNUC_UNUSED,
const char *hostname G_GNUC_UNUSED,
const char *aclname G_GNUC_UNUSED,
const char *authzid G_GNUC_UNUSED,
QCryptoTLSCredsEndpoint endpoint G_GNUC_UNUSED,
Error **errp)
{

2
crypto/trace-events
View file

@ -19,5 +19,5 @@ qcrypto_tls_creds_x509_load_cert(void *creds, int isServer, const char *file) "T
qcrypto_tls_creds_x509_load_cert_list(void *creds, const char *file) "TLS creds x509 load cert list creds=%p file=%s"
# crypto/tlssession.c
qcrypto_tls_session_new(void *session, void *creds, const char *hostname, const char *aclname, int endpoint) "TLS session new session=%p creds=%p hostname=%s aclname=%s endpoint=%d"
qcrypto_tls_session_new(void *session, void *creds, const char *hostname, const char *authzid, int endpoint) "TLS session new session=%p creds=%p hostname=%s authzid=%s endpoint=%d"
qcrypto_tls_session_check_creds(void *session, const char *status) "TLS session check creds session=%p status=%s"

303
hw/usb/dev-mtp.c
View file

@ -11,17 +11,16 @@
#include "qemu/osdep.h"
#include "qapi/error.h"
#include "qemu/error-report.h"
#include <wchar.h>
#include <dirent.h>
#include <sys/statvfs.h>
#ifdef CONFIG_INOTIFY1
#include <sys/inotify.h>
#include "qemu/main-loop.h"
#endif
#include "qemu-common.h"
#include "qemu/iov.h"
#include "qemu/filemonitor.h"
#include "trace.h"
#include "hw/usb.h"
#include "desc.h"
@ -132,7 +131,6 @@ enum {
EP_EVENT,
};
#ifdef CONFIG_INOTIFY1
typedef struct MTPMonEntry MTPMonEntry;
struct MTPMonEntry {
@ -141,7 +139,6 @@ struct MTPMonEntry {
QTAILQ_ENTRY(MTPMonEntry) next;
};
#endif
struct MTPControl {
uint16_t code;
@ -172,10 +169,8 @@ struct MTPObject {
char *name;
char *path;
struct stat stat;
#ifdef CONFIG_INOTIFY1
/* inotify watch cookie */
int watchfd;
#endif
/* file monitor watch id */
int watchid;
MTPObject *parent;
uint32_t nchildren;
QLIST_HEAD(, MTPObject) children;
@ -198,11 +193,8 @@ struct MTPState {
bool readonly;
QTAILQ_HEAD(, MTPObject) objects;
#ifdef CONFIG_INOTIFY1
/* inotify descriptor */
int inotifyfd;
QFileMonitor *file_monitor;
QTAILQ_HEAD(, MTPMonEntry) events;
#endif
/* Responder is expecting a write operation */
bool write_pending;
struct {
@ -383,7 +375,7 @@ static const USBDesc desc = {
/* ----------------------------------------------------------------------- */
static MTPObject *usb_mtp_object_alloc(MTPState *s, uint32_t handle,
MTPObject *parent, char *name)
MTPObject *parent, const char *name)
{
MTPObject *o = g_new0(MTPObject, 1);
@ -391,6 +383,7 @@ static MTPObject *usb_mtp_object_alloc(MTPState *s, uint32_t handle,
goto ignore;
}
o->watchid = -1;
o->handle = handle;
o->parent = parent;
o->name = g_strdup(name);
@ -437,6 +430,10 @@ static void usb_mtp_object_free(MTPState *s, MTPObject *o)
trace_usb_mtp_object_free(s->dev.addr, o->handle, o->path);
if (o->watchid != -1 && s->file_monitor) {
qemu_file_monitor_remove_watch(s->file_monitor, o->path, o->watchid);
}
QTAILQ_REMOVE(&s->objects, o, next);
if (o->parent) {
QLIST_REMOVE(o, list);
@ -465,7 +462,7 @@ static MTPObject *usb_mtp_object_lookup(MTPState *s, uint32_t handle)
}
static MTPObject *usb_mtp_add_child(MTPState *s, MTPObject *o,
char *name)
const char *name)
{
MTPObject *child =
usb_mtp_object_alloc(s, s->next_handle++, o, name);
@ -484,10 +481,14 @@ static MTPObject *usb_mtp_add_child(MTPState *s, MTPObject *o,
}
static MTPObject *usb_mtp_object_lookup_name(MTPObject *parent,
char *name, int len)
const char *name, int len)
{
MTPObject *iter;
if (len == -1) {
len = strlen(name);
}
QLIST_FOREACH(iter, &parent->children, list) {
if (strncmp(iter->name, name, len) == 0) {
return iter;
@ -497,13 +498,12 @@ static MTPObject *usb_mtp_object_lookup_name(MTPObject *parent,
return NULL;
}
#ifdef CONFIG_INOTIFY1
static MTPObject *usb_mtp_object_lookup_wd(MTPState *s, int wd)
static MTPObject *usb_mtp_object_lookup_id(MTPState *s, int id)
{
MTPObject *iter;
QTAILQ_FOREACH(iter, &s->objects, next) {
if (iter->watchfd == wd) {
if (iter->watchid == id) {
return iter;
}
}
@ -511,160 +511,103 @@ static MTPObject *usb_mtp_object_lookup_wd(MTPState *s, int wd)
return NULL;
}
static void inotify_watchfn(void *arg)
static void file_monitor_event(int id,
QFileMonitorEvent ev,
const char *name,
void *opaque)
{
MTPState *s = arg;
ssize_t bytes;
/* From the man page: atleast one event can be read */
int pos;
char buf[sizeof(struct inotify_event) + NAME_MAX + 1];
MTPState *s = opaque;
MTPObject *parent = usb_mtp_object_lookup_id(s, id);
MTPMonEntry *entry = NULL;
MTPObject *o;
for (;;) {
bytes = read(s->inotifyfd, buf, sizeof(buf));
pos = 0;
if (bytes <= 0) {
/* Better luck next time */
return;
}
/*
* TODO: Ignore initiator initiated events.
* For now we are good because the store is RO
*/
while (bytes > 0) {
char *p = buf + pos;
struct inotify_event *event = (struct inotify_event *)p;
int watchfd = 0;
uint32_t mask = event->mask & (IN_CREATE | IN_DELETE |
IN_MODIFY | IN_IGNORED);
MTPObject *parent = usb_mtp_object_lookup_wd(s, event->wd);
MTPMonEntry *entry = NULL;
MTPObject *o;
pos = pos + sizeof(struct inotify_event) + event->len;
bytes = bytes - pos;
if (!parent) {
continue;
}
switch (mask) {
case IN_CREATE:
if (usb_mtp_object_lookup_name
(parent, event->name, event->len)) {
/* Duplicate create event */
continue;
}
entry = g_new0(MTPMonEntry, 1);
entry->handle = s->next_handle;
entry->event = EVT_OBJ_ADDED;
o = usb_mtp_add_child(s, parent, event->name);
if (!o) {
g_free(entry);
continue;
}
o->watchfd = watchfd;
trace_usb_mtp_inotify_event(s->dev.addr, event->name,
event->mask, "Obj Added");
break;
case IN_DELETE:
/*
* The kernel issues a IN_IGNORED event
* when a dir containing a watchpoint is
* deleted, so we don't have to delete the
* watchpoint
*/
o = usb_mtp_object_lookup_name(parent, event->name, event->len);
if (!o) {
continue;
}
entry = g_new0(MTPMonEntry, 1);
entry->handle = o->handle;
entry->event = EVT_OBJ_REMOVED;
trace_usb_mtp_inotify_event(s->dev.addr, o->path,
event->mask, "Obj Deleted");
usb_mtp_object_free(s, o);
break;
case IN_MODIFY:
o = usb_mtp_object_lookup_name(parent, event->name, event->len);
if (!o) {
continue;
}
entry = g_new0(MTPMonEntry, 1);
entry->handle = o->handle;
entry->event = EVT_OBJ_INFO_CHANGED;
trace_usb_mtp_inotify_event(s->dev.addr, o->path,
event->mask, "Obj Modified");
break;
case IN_IGNORED:
trace_usb_mtp_inotify_event(s->dev.addr, parent->path,
event->mask, "Obj parent dir ignored");
break;
default:
fprintf(stderr, "usb-mtp: failed to parse inotify event\n");
continue;
}
if (entry) {
QTAILQ_INSERT_HEAD(&s->events, entry, next);
}
}
}
}
static int usb_mtp_inotify_init(MTPState *s)
{
int fd;
fd = inotify_init1(IN_NONBLOCK);
if (fd == -1) {
return 1;
}
QTAILQ_INIT(&s->events);
s->inotifyfd = fd;
qemu_set_fd_handler(fd, inotify_watchfn, NULL, s);
return 0;
}
static void usb_mtp_inotify_cleanup(MTPState *s)
{
MTPMonEntry *e, *p;
if (!s->inotifyfd) {
if (!parent) {
return;
}
qemu_set_fd_handler(s->inotifyfd, NULL, NULL, s);
close(s->inotifyfd);
switch (ev) {
case QFILE_MONITOR_EVENT_CREATED:
if (usb_mtp_object_lookup_name(parent, name, -1)) {
/* Duplicate create event */
return;
}
entry = g_new0(MTPMonEntry, 1);
entry->handle = s->next_handle;
entry->event = EVT_OBJ_ADDED;
o = usb_mtp_add_child(s, parent, name);
if (!o) {
g_free(entry);
return;
}
trace_usb_mtp_file_monitor_event(s->dev.addr, name, "Obj Added");
break;
case QFILE_MONITOR_EVENT_DELETED:
/*
* The kernel issues a IN_IGNORED event
* when a dir containing a watchpoint is
* deleted, so we don't have to delete the
* watchpoint
*/
o = usb_mtp_object_lookup_name(parent, name, -1);
if (!o) {
return;
}
entry = g_new0(MTPMonEntry, 1);
entry->handle = o->handle;
entry->event = EVT_OBJ_REMOVED;
trace_usb_mtp_file_monitor_event(s->dev.addr, o->path, "Obj Deleted");
usb_mtp_object_free(s, o);
break;
case QFILE_MONITOR_EVENT_MODIFIED:
o = usb_mtp_object_lookup_name(parent, name, -1);
if (!o) {
return;
}
entry = g_new0(MTPMonEntry, 1);
entry->handle = o->handle;
entry->event = EVT_OBJ_INFO_CHANGED;
trace_usb_mtp_file_monitor_event(s->dev.addr, o->path, "Obj Modified");
break;
case QFILE_MONITOR_EVENT_IGNORED:
trace_usb_mtp_file_monitor_event(s->dev.addr, parent->path,
"Obj parent dir ignored");
break;
case QFILE_MONITOR_EVENT_ATTRIBUTES:
break;
default:
g_assert_not_reached();
}
if (entry) {
QTAILQ_INSERT_HEAD(&s->events, entry, next);
}
}
static void usb_mtp_file_monitor_cleanup(MTPState *s)
{
MTPMonEntry *e, *p;
QTAILQ_FOREACH_SAFE(e, &s->events, next, p) {
QTAILQ_REMOVE(&s->events, e, next);
g_free(e);
}
qemu_file_monitor_free(s->file_monitor);
s->file_monitor = NULL;
}
static int usb_mtp_add_watch(int inotifyfd, char *path)
{
uint32_t mask = IN_CREATE | IN_DELETE | IN_MODIFY |
IN_ISDIR;
return inotify_add_watch(inotifyfd, path, mask);
}
#endif
static void usb_mtp_object_readdir(MTPState *s, MTPObject *o)
{
struct dirent *entry;
DIR *dir;
int fd;
Error *err = NULL;
if (o->have_children) {
return;
@ -680,16 +623,21 @@ static void usb_mtp_object_readdir(MTPState *s, MTPObject *o)
close(fd);
return;
}
#ifdef CONFIG_INOTIFY1
int watchfd = usb_mtp_add_watch(s->inotifyfd, o->path);
if (watchfd == -1) {
fprintf(stderr, "usb-mtp: failed to add watch for %s\n", o->path);
} else {
trace_usb_mtp_inotify_event(s->dev.addr, o->path,
0, "Watch Added");
o->watchfd = watchfd;
if (s->file_monitor) {
int id = qemu_file_monitor_add_watch(s->file_monitor, o->path, NULL,
file_monitor_event, s, &err);
if (id == -1) {
error_report("usb-mtp: failed to add watch for %s: %s", o->path,
error_get_pretty(err));
error_free(err);
} else {
trace_usb_mtp_file_monitor_event(s->dev.addr, o->path,
"Watch Added");
o->watchid = id;
}
}
#endif
while ((entry = readdir(dir)) != NULL) {
usb_mtp_add_child(s, o, entry->d_name);
}
@ -1197,13 +1145,11 @@ enum {
/* Assumes that children, if any, have been already freed */
static void usb_mtp_object_free_one(MTPState *s, MTPObject *o)
{
#ifndef CONFIG_INOTIFY1
assert(o->nchildren == 0);
QTAILQ_REMOVE(&s->objects, o, next);
g_free(o->name);
g_free(o->path);
g_free(o);
#endif
}
static int usb_mtp_deletefn(MTPState *s, MTPObject *o, uint32_t trans)
@ -1302,6 +1248,7 @@ static void usb_mtp_command(MTPState *s, MTPControl *c)
MTPData *data_in = NULL;
MTPObject *o = NULL;
uint32_t nres = 0, res0 = 0;
Error *err = NULL;
/* sanity checks */
if (c->code >= CMD_CLOSE_SESSION && s->session == 0) {
@ -1329,19 +1276,21 @@ static void usb_mtp_command(MTPState *s, MTPControl *c)
trace_usb_mtp_op_open_session(s->dev.addr);
s->session = c->argv[0];
usb_mtp_object_alloc(s, s->next_handle++, NULL, s->root);
#ifdef CONFIG_INOTIFY1
if (usb_mtp_inotify_init(s)) {
fprintf(stderr, "usb-mtp: file monitoring init failed\n");
s->file_monitor = qemu_file_monitor_new(&err);
if (err) {
error_report("usb-mtp: file monitoring init failed: %s",
error_get_pretty(err));
error_free(err);
} else {
QTAILQ_INIT(&s->events);
}
#endif
break;
case CMD_CLOSE_SESSION:
trace_usb_mtp_op_close_session(s->dev.addr);
s->session = 0;
s->next_handle = 0;
#ifdef CONFIG_INOTIFY1
usb_mtp_inotify_cleanup(s);
#endif
usb_mtp_file_monitor_cleanup(s);
usb_mtp_object_free(s, QTAILQ_FIRST(&s->objects));
assert(QTAILQ_EMPTY(&s->objects));
break;
@ -1554,9 +1503,7 @@ static void usb_mtp_handle_reset(USBDevice *dev)
trace_usb_mtp_reset(s->dev.addr);
#ifdef CONFIG_INOTIFY1
usb_mtp_inotify_cleanup(s);
#endif
usb_mtp_file_monitor_cleanup(s);
usb_mtp_object_free(s, QTAILQ_FIRST(&s->objects));
s->session = 0;
usb_mtp_data_free(s->data_in);
@ -2027,7 +1974,6 @@ static void usb_mtp_handle_data(USBDevice *dev, USBPacket *p)
}
break;
case EP_EVENT:
#ifdef CONFIG_INOTIFY1
if (!QTAILQ_EMPTY(&s->events)) {
struct MTPMonEntry *e = QTAILQ_LAST(&s->events);
uint32_t handle;
@ -2051,7 +1997,6 @@ static void usb_mtp_handle_data(USBDevice *dev, USBPacket *p)
g_free(e);
return;
}
#endif
p->status = USB_RET_NAK;
return;
default:

2
hw/usb/trace-events
View file

@ -237,7 +237,7 @@ usb_mtp_op_unknown(int dev, uint32_t code) "dev %d, command code 0x%x"
usb_mtp_object_alloc(int dev, uint32_t handle, const char *path) "dev %d, handle 0x%x, path %s"
usb_mtp_object_free(int dev, uint32_t handle, const char *path) "dev %d, handle 0x%x, path %s"
usb_mtp_add_child(int dev, uint32_t handle, const char *path) "dev %d, handle 0x%x, path %s"
usb_mtp_inotify_event(int dev, const char *path, uint32_t mask, const char *s) "dev %d, path %s mask 0x%x event %s"
usb_mtp_file_monitor_event(int dev, const char *path, const char *s) "dev %d, path %s event %s"
# hw/usb/host-libusb.c
usb_host_open_started(int bus, int addr) "dev %d:%d"

112
include/authz/base.h Normal file
View file

@ -0,0 +1,112 @@
/*
* QEMU authorization framework base class
*
* Copyright (c) 2018 Red Hat, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*
*/
#ifndef QAUTHZ_BASE_H__
#define QAUTHZ_BASE_H__
#include "qemu-common.h"
#include "qapi/error.h"
#include "qom/object.h"
#define TYPE_QAUTHZ "authz"
#define QAUTHZ_CLASS(klass) \
OBJECT_CLASS_CHECK(QAuthZClass, (klass), \
TYPE_QAUTHZ)
#define QAUTHZ_GET_CLASS(obj) \
OBJECT_GET_CLASS(QAuthZClass, (obj), \
TYPE_QAUTHZ)
#define QAUTHZ(obj) \
INTERFACE_CHECK(QAuthZ, (obj), \
TYPE_QAUTHZ)
typedef struct QAuthZ QAuthZ;
typedef struct QAuthZClass QAuthZClass;
/**
* QAuthZ:
*
* The QAuthZ class defines an API contract to be used
* for providing an authorization driver for services
* with user identities.
*/
struct QAuthZ {
Object parent_obj;
};
struct QAuthZClass {
ObjectClass parent_class;
bool (*is_allowed)(QAuthZ *authz,
const char *identity,
Error **errp);
};
/**
* qauthz_is_allowed:
* @authz: the authorization object
* @identity: the user identity to authorize
* @errp: pointer to a NULL initialized error object
*
* Check if a user @identity is authorized. If an error
* occurs this method will return false to indicate
* denial, as well as setting @errp to contain the details.
* Callers are recommended to treat the denial and error
* scenarios identically. Specifically the error info in
* @errp should never be fed back to the user being
* authorized, it is merely for benefit of administrator
* debugging.
*
* Returns: true if @identity is authorized, false if denied or if
* an error occurred.
*/
bool qauthz_is_allowed(QAuthZ *authz,
const char *identity,
Error **errp);
/**
* qauthz_is_allowed_by_id:
* @authzid: ID of the authorization object
* @identity: the user identity to authorize
* @errp: pointer to a NULL initialized error object
*
* Check if a user @identity is authorized. If an error
* occurs this method will return false to indicate
* denial, as well as setting @errp to contain the details.
* Callers are recommended to treat the denial and error
* scenarios identically. Specifically the error info in
* @errp should never be fed back to the user being
* authorized, it is merely for benefit of administrator
* debugging.
*
* Returns: true if @identity is authorized, false if denied or if
* an error occurred.
*/
bool qauthz_is_allowed_by_id(const char *authzid,
const char *identity,
Error **errp);
#endif /* QAUTHZ_BASE_H__ */

106
include/authz/list.h Normal file
View file

@ -0,0 +1,106 @@
/*
* QEMU list authorization driver
*
* Copyright (c) 2018 Red Hat, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*
*/
#ifndef QAUTHZ_LIST_H__
#define QAUTHZ_LIST_H__
#include "authz/base.h"
#include "qapi/qapi-types-authz.h"
#define TYPE_QAUTHZ_LIST "authz-list"
#define QAUTHZ_LIST_CLASS(klass) \
OBJECT_CLASS_CHECK(QAuthZListClass, (klass), \
TYPE_QAUTHZ_LIST)
#define QAUTHZ_LIST_GET_CLASS(obj) \
OBJECT_GET_CLASS(QAuthZListClass, (obj), \
TYPE_QAUTHZ_LIST)
#define QAUTHZ_LIST(obj) \
INTERFACE_CHECK(QAuthZList, (obj), \
TYPE_QAUTHZ_LIST)
typedef struct QAuthZList QAuthZList;
typedef struct QAuthZListClass QAuthZListClass;
/**
* QAuthZList:
*
* This authorization driver provides a list mechanism
* for granting access by matching user names against a
* list of globs. Each match rule has an associated policy
* and a catch all policy applies if no rule matches
*
* To create an instance of this class via QMP:
*
* {
* "execute": "object-add",
* "arguments": {
* "qom-type": "authz-list",
* "id": "authz0",
* "props": {
* "rules": [
* { "match": "fred", "policy": "allow", "format": "exact" },
* { "match": "bob", "policy": "allow", "format": "exact" },
* { "match": "danb", "policy": "deny", "format": "exact" },
* { "match": "dan*", "policy": "allow", "format": "glob" }
* ],
* "policy": "deny"
* }
* }
* }
*
*/
struct QAuthZList {
QAuthZ parent_obj;
QAuthZListPolicy policy;
QAuthZListRuleList *rules;
};
struct QAuthZListClass {
QAuthZClass parent_class;
};
QAuthZList *qauthz_list_new(const char *id,
QAuthZListPolicy policy,
Error **errp);
ssize_t qauthz_list_append_rule(QAuthZList *auth,
const char *match,
QAuthZListPolicy policy,
QAuthZListFormat format,
Error **errp);
ssize_t qauthz_list_insert_rule(QAuthZList *auth,
const char *match,
QAuthZListPolicy policy,
QAuthZListFormat format,
size_t index,
Error **errp);
ssize_t qauthz_list_delete_rule(QAuthZList *auth,
const char *match);
#endif /* QAUTHZ_LIST_H__ */

111
include/authz/listfile.h Normal file
View file

@ -0,0 +1,111 @@
/*
* QEMU list file authorization driver
*
* Copyright (c) 2018 Red Hat, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*
*/
#ifndef QAUTHZ_LIST_FILE_H__
#define QAUTHZ_LIST_FILE_H__
#include "authz/list.h"
#include "qapi/qapi-types-authz.h"
#include "qemu/filemonitor.h"
#define TYPE_QAUTHZ_LIST_FILE "authz-list-file"
#define QAUTHZ_LIST_FILE_CLASS(klass) \
OBJECT_CLASS_CHECK(QAuthZListFileClass, (klass), \
TYPE_QAUTHZ_LIST_FILE)
#define QAUTHZ_LIST_FILE_GET_CLASS(obj) \
OBJECT_GET_CLASS(QAuthZListFileClass, (obj), \
TYPE_QAUTHZ_LIST_FILE)
#define QAUTHZ_LIST_FILE(obj) \
INTERFACE_CHECK(QAuthZListFile, (obj), \
TYPE_QAUTHZ_LIST_FILE)
typedef struct QAuthZListFile QAuthZListFile;
typedef struct QAuthZListFileClass QAuthZListFileClass;
/**
* QAuthZListFile:
*
* This authorization driver provides a file mechanism
* for granting access by matching user names against a
* file of globs. Each match rule has an associated policy
* and a catch all policy applies if no rule matches
*
* To create an instance of this class via QMP:
*
* {
* "execute": "object-add",
* "arguments": {
* "qom-type": "authz-list-file",
* "id": "authz0",
* "props": {
* "filename": "/etc/qemu/myvm-vnc.acl",
* "refresh": true
* }
* }
* }
*
* If 'refresh' is 'yes', inotify is used to monitor for changes
* to the file and auto-reload the rules.
*
* The myvm-vnc.acl file should contain the parameters for
* the QAuthZList object in JSON format:
*
* {
* "rules": [
* { "match": "fred", "policy": "allow", "format": "exact" },
* { "match": "bob", "policy": "allow", "format": "exact" },
* { "match": "danb", "policy": "deny", "format": "exact" },
* { "match": "dan*", "policy": "allow", "format": "glob" }
* ],
* "policy": "deny"
* }
*
* The object can be created on the command line using
*
* -object authz-list-file,id=authz0,\
* filename=/etc/qemu/myvm-vnc.acl,refresh=yes
*
*/
struct QAuthZListFile {
QAuthZ parent_obj;
QAuthZ *list;
char *filename;
bool refresh;
QFileMonitor *file_monitor;
int file_watch;
};
struct QAuthZListFileClass {
QAuthZClass parent_class;
};
QAuthZListFile *qauthz_list_file_new(const char *id,
const char *filename,
bool refresh,
Error **errp);
#endif /* QAUTHZ_LIST_FILE_H__ */

100
include/authz/pamacct.h Normal file
View file

@ -0,0 +1,100 @@
/*
* QEMU PAM authorization driver
*
* Copyright (c) 2018 Red Hat, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*
*/
#ifndef QAUTHZ_PAM_H__
#define QAUTHZ_PAM_H__
#include "authz/base.h"
#define TYPE_QAUTHZ_PAM "authz-pam"
#define QAUTHZ_PAM_CLASS(klass) \
OBJECT_CLASS_CHECK(QAuthZPAMClass, (klass), \
TYPE_QAUTHZ_PAM)
#define QAUTHZ_PAM_GET_CLASS(obj) \
OBJECT_GET_CLASS(QAuthZPAMClass, (obj), \
TYPE_QAUTHZ_PAM)
#define QAUTHZ_PAM(obj) \
INTERFACE_CHECK(QAuthZPAM, (obj), \
TYPE_QAUTHZ_PAM)
typedef struct QAuthZPAM QAuthZPAM;
typedef struct QAuthZPAMClass QAuthZPAMClass;
/**
* QAuthZPAM:
*
* This authorization driver provides a PAM mechanism
* for granting access by matching user names against a
* list of globs. Each match rule has an associated policy
* and a catch all policy applies if no rule matches
*
* To create an instance of this class via QMP:
*
* {
* "execute": "object-add",
* "arguments": {
* "qom-type": "authz-pam",
* "id": "authz0",
* "parameters": {
* "service": "qemu-vnc-tls"
* }
* }
* }
*
* The driver only uses the PAM "account" verification
* subsystem. The above config would require a config
* file /etc/pam.d/qemu-vnc-tls. For a simple file
* lookup it would contain
*
* account requisite pam_listfile.so item=user sense=allow \
* file=/etc/qemu/vnc.allow
*
* The external file would then contain a list of usernames.
* If x509 cert was being used as the username, a suitable
* entry would match the distinguish name:
*
* CN=laptop.berrange.com,O=Berrange Home,L=London,ST=London,C=GB
*
* On the command line it can be created using
*
* -object authz-pam,id=authz0,service=qemu-vnc-tls
*
*/
struct QAuthZPAM {
QAuthZ parent_obj;
char *service;
};
struct QAuthZPAMClass {
QAuthZClass parent_class;
};
QAuthZPAM *qauthz_pam_new(const char *id,
const char *service,
Error **errp);
#endif /* QAUTHZ_PAM_H__ */

84
include/authz/simple.h Normal file
View file

@ -0,0 +1,84 @@
/*
* QEMU simple authorization driver
*
* Copyright (c) 2018 Red Hat, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*
*/
#ifndef QAUTHZ_SIMPLE_H__
#define QAUTHZ_SIMPLE_H__
#include "authz/base.h"
#define TYPE_QAUTHZ_SIMPLE "authz-simple"
#define QAUTHZ_SIMPLE_CLASS(klass) \
OBJECT_CLASS_CHECK(QAuthZSimpleClass, (klass), \
TYPE_QAUTHZ_SIMPLE)
#define QAUTHZ_SIMPLE_GET_CLASS(obj) \
OBJECT_GET_CLASS(QAuthZSimpleClass, (obj), \
TYPE_QAUTHZ_SIMPLE)
#define QAUTHZ_SIMPLE(obj) \
INTERFACE_CHECK(QAuthZSimple, (obj), \
TYPE_QAUTHZ_SIMPLE)
typedef struct QAuthZSimple QAuthZSimple;
typedef struct QAuthZSimpleClass QAuthZSimpleClass;
/**
* QAuthZSimple:
*
* This authorization driver provides a simple mechanism
* for granting access based on an exact matched username.
*
* To create an instance of this class via QMP:
*
* {
* "execute": "object-add",
* "arguments": {
* "qom-type": "authz-simple",
* "id": "authz0",
* "props": {
* "identity": "fred"
* }
* }
* }
*
* Or via the command line
*
* -object authz-simple,id=authz0,identity=fred
*
*/
struct QAuthZSimple {
QAuthZ parent_obj;
char *identity;
};
struct QAuthZSimpleClass {
QAuthZClass parent_class;
};
QAuthZSimple *qauthz_simple_new(const char *id,
const char *identity,
Error **errp);
#endif /* QAUTHZ_SIMPLE_H__ */

66
include/qemu/acl.h
View file

@ -1,66 +0,0 @@
/*
* QEMU access control list management
*
* Copyright (C) 2009 Red Hat, Inc
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#ifndef QEMU_ACL_H
#define QEMU_ACL_H
#include "qemu/queue.h"
typedef struct qemu_acl_entry qemu_acl_entry;
typedef struct qemu_acl qemu_acl;
struct qemu_acl_entry {
char *match;
int deny;
QTAILQ_ENTRY(qemu_acl_entry) next;
};
struct qemu_acl {
char *aclname;
unsigned int nentries;
QTAILQ_HEAD(,qemu_acl_entry) entries;
int defaultDeny;
};
qemu_acl *qemu_acl_init(const char *aclname);
qemu_acl *qemu_acl_find(const char *aclname);
int qemu_acl_party_is_allowed(qemu_acl *acl,
const char *party);
void qemu_acl_reset(qemu_acl *acl);
int qemu_acl_append(qemu_acl *acl,
int deny,
const char *match);
int qemu_acl_insert(qemu_acl *acl,
int deny,
const char *match,
int index);
int qemu_acl_remove(qemu_acl *acl,
const char *match);
#endif /* QEMU_ACL_H */

128
include/qemu/filemonitor.h Normal file
View file

@ -0,0 +1,128 @@
/*
* QEMU file monitor helper
*
* Copyright (c) 2018 Red Hat, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*
*/
#ifndef QEMU_FILE_MONITOR_H
#define QEMU_FILE_MONITOR_H
#include "qemu-common.h"
typedef struct QFileMonitor QFileMonitor;
typedef enum {
/* File has been created in a dir */
QFILE_MONITOR_EVENT_CREATED,
/* File has been modified in a dir */
QFILE_MONITOR_EVENT_MODIFIED,
/* File has been deleted in a dir */
QFILE_MONITOR_EVENT_DELETED,
/* File has attributes changed */
QFILE_MONITOR_EVENT_ATTRIBUTES,
/* Dir is no longer being monitored (due to deletion) */
QFILE_MONITOR_EVENT_IGNORED,
} QFileMonitorEvent;
/**
* QFileMonitorHandler:
* @id: id from qemu_file_monitor_add_watch()
* @event: the file change that occurred
* @filename: the name of the file affected
* @opaque: opaque data provided to qemu_file_monitor_add_watch()
*
* Invoked whenever a file changes. If @event is
* QFILE_MONITOR_EVENT_IGNORED, @filename will be
* empty.
*
*/
typedef void (*QFileMonitorHandler)(int id,
QFileMonitorEvent event,
const char *filename,
void *opaque);
/**
* qemu_file_monitor_new:
* @errp: pointer to a NULL-initialized error object
*
* Create a handle for a file monitoring object.
*
* This object does locking internally to enable it to be
* safe to use from multiple threads
*
* If the platform does not support file monitoring, an
* error will be reported. Likewise if file monitoring
* is supported, but cannot be initialized
*
* Currently this is implemented on Linux platforms with
* the inotify subsystem.
*
* Returns: the new monitoring object, or NULL on error
*/
QFileMonitor *qemu_file_monitor_new(Error **errp);
/**
* qemu_file_monitor_free:
* @mon: the file monitor context
*
* Free resources associated with the file monitor,
* including any currently registered watches.
*/
void qemu_file_monitor_free(QFileMonitor *mon);
/**
* qemu_file_monitor_add_watch:
* @mon: the file monitor context
* @dirpath: the directory whose contents to watch
* @filename: optional filename to filter on
* @cb: the function to invoke when @dirpath has changes
* @opaque: data to pass to @cb
* @errp: pointer to a NULL-initialized error object
*
* Register to receive notifications of changes
* in the directory @dirpath. All files in the
* directory will be monitored. If the caller is
* only interested in one specific file, @filename
* can be used to filter events.
*
* Returns: a positive integer watch ID, or -1 on error
*/
int qemu_file_monitor_add_watch(QFileMonitor *mon,
const char *dirpath,
const char *filename,
QFileMonitorHandler cb,
void *opaque,
Error **errp);
/**
* qemu_file_monitor_remove_watch:
* @mon: the file monitor context
* @dirpath: the directory whose contents to unwatch
* @id: id of the watch to remove
*
* Removes the file monitoring watch @id, associated
* with the directory @dirpath. This must never be
* called from a QFileMonitorHandler callback, or a
* deadlock will result.
*/
void qemu_file_monitor_remove_watch(QFileMonitor *mon,
const char *dirpath,
int id);
#endif /* QEMU_FILE_MONITOR_H */

175
monitor.c
View file

@ -51,7 +51,8 @@
#include "sysemu/balloon.h"
#include "qemu/timer.h"
#include "sysemu/hw_accel.h"
#include "qemu/acl.h"
#include "authz/list.h"
#include "qapi/util.h"
#include "sysemu/tpm.h"
#include "qapi/qmp/qdict.h"
#include "qapi/qmp/qerror.h"
@ -2016,93 +2017,148 @@ static void hmp_wavcapture(Monitor *mon, const QDict *qdict)
QLIST_INSERT_HEAD (&capture_head, s, entries);
}
static qemu_acl *find_acl(Monitor *mon, const char *name)
static QAuthZList *find_auth(Monitor *mon, const char *name)
{
qemu_acl *acl = qemu_acl_find(name);
Object *obj;
Object *container;
if (!acl) {
container = object_get_objects_root();
obj = object_resolve_path_component(container, name);
if (!obj) {
monitor_printf(mon, "acl: unknown list '%s'\n", name);
return NULL;
}
return acl;
return QAUTHZ_LIST(obj);
}
static void hmp_acl_show(Monitor *mon, const QDict *qdict)
{
const char *aclname = qdict_get_str(qdict, "aclname");
qemu_acl *acl = find_acl(mon, aclname);
qemu_acl_entry *entry;
int i = 0;
QAuthZList *auth = find_auth(mon, aclname);
QAuthZListRuleList *rules;
size_t i = 0;
if (acl) {
monitor_printf(mon, "policy: %s\n",
acl->defaultDeny ? "deny" : "allow");
QTAILQ_FOREACH(entry, &acl->entries, next) {
i++;
monitor_printf(mon, "%d: %s %s\n", i,
entry->deny ? "deny" : "allow", entry->match);
}
if (!auth) {
return;
}
monitor_printf(mon, "policy: %s\n",
QAuthZListPolicy_str(auth->policy));
rules = auth->rules;
while (rules) {
QAuthZListRule *rule = rules->value;
i++;
monitor_printf(mon, "%zu: %s %s\n", i,
QAuthZListPolicy_str(rule->policy),
rule->match);
rules = rules->next;
}
}
static void hmp_acl_reset(Monitor *mon, const QDict *qdict)
{
const char *aclname = qdict_get_str(qdict, "aclname");
qemu_acl *acl = find_acl(mon, aclname);
QAuthZList *auth = find_auth(mon, aclname);
if (acl) {
qemu_acl_reset(acl);
monitor_printf(mon, "acl: removed all rules\n");
if (!auth) {
return;
}
auth->policy = QAUTHZ_LIST_POLICY_DENY;
qapi_free_QAuthZListRuleList(auth->rules);
auth->rules = NULL;
monitor_printf(mon, "acl: removed all rules\n");
}
static void hmp_acl_policy(Monitor *mon, const QDict *qdict)
{
const char *aclname = qdict_get_str(qdict, "aclname");
const char *policy = qdict_get_str(qdict, "policy");
qemu_acl *acl = find_acl(mon, aclname);
QAuthZList *auth = find_auth(mon, aclname);
int val;
Error *err = NULL;
if (acl) {
if (strcmp(policy, "allow") == 0) {
acl->defaultDeny = 0;
if (!auth) {
return;
}
val = qapi_enum_parse(&QAuthZListPolicy_lookup,
policy,
QAUTHZ_LIST_POLICY_DENY,
&err);
if (err) {
error_free(err);
monitor_printf(mon, "acl: unknown policy '%s', "
"expected 'deny' or 'allow'\n", policy);
} else {
auth->policy = val;
if (auth->policy == QAUTHZ_LIST_POLICY_ALLOW) {
monitor_printf(mon, "acl: policy set to 'allow'\n");
} else if (strcmp(policy, "deny") == 0) {
acl->defaultDeny = 1;
monitor_printf(mon, "acl: policy set to 'deny'\n");
} else {
monitor_printf(mon, "acl: unknown policy '%s', "
"expected 'deny' or 'allow'\n", policy);
monitor_printf(mon, "acl: policy set to 'deny'\n");
}
}
}
static QAuthZListFormat hmp_acl_get_format(const char *match)
{
if (strchr(match, '*')) {
return QAUTHZ_LIST_FORMAT_GLOB;
} else {
return QAUTHZ_LIST_FORMAT_EXACT;
}
}
static void hmp_acl_add(Monitor *mon, const QDict *qdict)
{
const char *aclname = qdict_get_str(qdict, "aclname");
const char *match = qdict_get_str(qdict, "match");
const char *policy = qdict_get_str(qdict, "policy");
const char *policystr = qdict_get_str(qdict, "policy");
int has_index = qdict_haskey(qdict, "index");
int index = qdict_get_try_int(qdict, "index", -1);
qemu_acl *acl = find_acl(mon, aclname);
int deny, ret;
QAuthZList *auth = find_auth(mon, aclname);
Error *err = NULL;
QAuthZListPolicy policy;
QAuthZListFormat format;
size_t i = 0;
if (acl) {
if (strcmp(policy, "allow") == 0) {
deny = 0;
} else if (strcmp(policy, "deny") == 0) {
deny = 1;
} else {
monitor_printf(mon, "acl: unknown policy '%s', "
"expected 'deny' or 'allow'\n", policy);
return;
}
if (has_index)
ret = qemu_acl_insert(acl, deny, match, index);
else
ret = qemu_acl_append(acl, deny, match);
if (ret < 0)
monitor_printf(mon, "acl: unable to add acl entry\n");
else
monitor_printf(mon, "acl: added rule at position %d\n", ret);
if (!auth) {
return;
}
policy = qapi_enum_parse(&QAuthZListPolicy_lookup,
policystr,
QAUTHZ_LIST_POLICY_DENY,
&err);
if (err) {
error_free(err);
monitor_printf(mon, "acl: unknown policy '%s', "
"expected 'deny' or 'allow'\n", policystr);
return;
}
format = hmp_acl_get_format(match);
if (has_index && index == 0) {
monitor_printf(mon, "acl: unable to add acl entry\n");
return;
}
if (has_index) {
i = qauthz_list_insert_rule(auth, match, policy,
format, index - 1, &err);
} else {
i = qauthz_list_append_rule(auth, match, policy,
format, &err);
}
if (err) {
monitor_printf(mon, "acl: unable to add rule: %s",
error_get_pretty(err));
error_free(err);
} else {
monitor_printf(mon, "acl: added rule at position %zu\n", i + 1);
}
}
@ -2110,15 +2166,18 @@ static void hmp_acl_remove(Monitor *mon, const QDict *qdict)
{
const char *aclname = qdict_get_str(qdict, "aclname");
const char *match = qdict_get_str(qdict, "match");
qemu_acl *acl = find_acl(mon, aclname);
int ret;
QAuthZList *auth = find_auth(mon, aclname);
ssize_t i = 0;
if (acl) {
ret = qemu_acl_remove(acl, match);
if (ret < 0)
monitor_printf(mon, "acl: no matching acl entry\n");
else
monitor_printf(mon, "acl: removed rule at position %d\n", ret);
if (!auth) {
return;
}
i = qauthz_list_delete_rule(auth, match);
if (i >= 0) {
monitor_printf(mon, "acl: removed rule at position %zu\n", i + 1);
} else {
monitor_printf(mon, "acl: no matching acl entry\n");
}
}

2
qapi/Makefile.objs
View file

@ -5,7 +5,7 @@ util-obj-y += opts-visitor.o qapi-clone-visitor.o
util-obj-y += qmp-event.o
util-obj-y += qapi-util.o
QAPI_COMMON_MODULES = block-core block char common crypto introspect
QAPI_COMMON_MODULES = authz block-core block char common crypto introspect
QAPI_COMMON_MODULES += job migration misc net rdma rocker run-state
QAPI_COMMON_MODULES += sockets tpm trace transaction ui
QAPI_TARGET_MODULES = target

58
qapi/authz.json Normal file
View file

@ -0,0 +1,58 @@
# -*- Mode: Python -*-
#
# QAPI authz definitions
##
# @QAuthZListPolicy:
#
# The authorization policy result
#
# @deny: deny access
# @allow: allow access
#
# Since: 4.0
##
{ 'enum': 'QAuthZListPolicy',
'prefix': 'QAUTHZ_LIST_POLICY',
'data': ['deny', 'allow']}
##
# @QAuthZListFormat:
#
# The authorization policy match format
#
# @exact: an exact string match
# @glob: string with ? and * shell wildcard support
#
# Since: 4.0
##
{ 'enum': 'QAuthZListFormat',
'prefix': 'QAUTHZ_LIST_FORMAT',
'data': ['exact', 'glob']}
##
# @QAuthZListRule:
#
# A single authorization rule.
#
# @match: a string or glob to match against a user identity
# @policy: the result to return if @match evaluates to true
# @format: the format of the @match rule (default 'exact')
#
# Since: 4.0
##
{ 'struct': 'QAuthZListRule',
'data': {'match': 'str',
'policy': 'QAuthZListPolicy',
'*format': 'QAuthZListFormat'}}
##
# @QAuthZListRuleListHack:
#
# Not exposed via QMP; hack to generate QAuthZListRuleList
# for use internally by the code.
#
# Since: 4.0
##
{ 'struct': 'QAuthZListRuleListHack',
'data': { 'unused': ['QAuthZListRule'] } }

1
qapi/qapi-schema.json
View file

@ -92,6 +92,7 @@
{ 'include': 'rocker.json' }
{ 'include': 'tpm.json' }
{ 'include': 'ui.json' }
{ 'include': 'authz.json' }
{ 'include': 'migration.json' }
{ 'include': 'transaction.json' }
{ 'include': 'trace.json' }

105
qemu-options.hx
View file

@ -4365,6 +4365,111 @@ e.g to launch a SEV guest
.....
@end example
@item -object authz-simple,id=@var{id},identity=@var{string}
Create an authorization object that will control access to network services.
The @option{identity} parameter is identifies the user and its format
depends on the network service that authorization object is associated
with. For authorizing based on TLS x509 certificates, the identity must
be the x509 distinguished name. Note that care must be taken to escape
any commas in the distinguished name.
An example authorization object to validate a x509 distinguished name
would look like:
@example
# $QEMU \
...
-object 'authz-simple,id=auth0,identity=CN=laptop.example.com,,O=Example Org,,L=London,,ST=London,,C=GB' \
...
@end example
Note the use of quotes due to the x509 distinguished name containing
whitespace, and escaping of ','.
@item -object authz-listfile,id=@var{id},filename=@var{path},refresh=@var{yes|no}
Create an authorization object that will control access to network services.
The @option{filename} parameter is the fully qualified path to a file
containing the access control list rules in JSON format.
An example set of rules that match against SASL usernames might look
like:
@example
@{
"rules": [
@{ "match": "fred", "policy": "allow", "format": "exact" @},
@{ "match": "bob", "policy": "allow", "format": "exact" @},
@{ "match": "danb", "policy": "deny", "format": "glob" @},
@{ "match": "dan*", "policy": "allow", "format": "exact" @},
],
"policy": "deny"
@}
@end example
When checking access the object will iterate over all the rules and
the first rule to match will have its @option{policy} value returned
as the result. If no rules match, then the default @option{policy}
value is returned.
The rules can either be an exact string match, or they can use the
simple UNIX glob pattern matching to allow wildcards to be used.
If @option{refresh} is set to true the file will be monitored
and automatically reloaded whenever its content changes.
As with the @code{authz-simple} object, the format of the identity
strings being matched depends on the network service, but is usually
a TLS x509 distinguished name, or a SASL username.
An example authorization object to validate a SASL username
would look like:
@example
# $QEMU \
...
-object authz-simple,id=auth0,filename=/etc/qemu/vnc-sasl.acl,refresh=yes
...
@end example
@item -object authz-pam,id=@var{id},service=@var{string}
Create an authorization object that will control access to network services.
The @option{service} parameter provides the name of a PAM service to use
for authorization. It requires that a file @code{/etc/pam.d/@var{service}}
exist to provide the configuration for the @code{account} subsystem.
An example authorization object to validate a TLS x509 distinguished
name would look like:
@example
# $QEMU \
...
-object authz-pam,id=auth0,service=qemu-vnc
...
@end example
There would then be a corresponding config file for PAM at
@code{/etc/pam.d/qemu-vnc} that contains:
@example
account requisite pam_listfile.so item=user sense=allow \
file=/etc/qemu/vnc.allow
@end example
Finally the @code{/etc/qemu/vnc.allow} file would contain
the list of x509 distingished names that are permitted
access
@example
CN=laptop.example.com,O=Example Home,L=London,ST=London,C=GB
@end example
@end table
ETEXI

12
qom/object.c
View file

@ -646,16 +646,20 @@ Object *object_new_with_propv(const char *typename,
goto error;
}
object_property_add_child(parent, id, obj, &local_err);
if (local_err) {
goto error;
if (id != NULL) {
object_property_add_child(parent, id, obj, &local_err);
if (local_err) {
goto error;
}
}
uc = (UserCreatable *)object_dynamic_cast(obj, TYPE_USER_CREATABLE);
if (uc) {
user_creatable_complete(uc, &local_err);
if (local_err) {
object_unparent(obj);
if (id != NULL) {
object_unparent(obj);
}
goto error;
}
}

16
qom/object_interfaces.c
View file

@ -75,16 +75,20 @@ Object *user_creatable_add_type(const char *type, const char *id,
goto out;
}
object_property_add_child(object_get_objects_root(),
id, obj, &local_err);
if (local_err) {
goto out;
if (id != NULL) {
object_property_add_child(object_get_objects_root(),
id, obj, &local_err);
if (local_err) {
goto out;
}
}
user_creatable_complete(USER_CREATABLE(obj), &local_err);
if (local_err) {
object_property_del(object_get_objects_root(),
id, &error_abort);
if (id != NULL) {
object_property_del(object_get_objects_root(),
id, &error_abort);
}
goto out;
}
out:

16
tests/Makefile.include
View file

@ -114,7 +114,12 @@ ifneq (,$(findstring qemu-ga,$(TOOLS)))
check-unit-$(land,$(CONFIG_LINUX),$(CONFIG_VIRTIO_SERIAL)) += tests/test-qga$(EXESUF)
endif
check-unit-y += tests/test-timed-average$(EXESUF)
check-unit-$(CONFIG_INOTIFY1) += tests/test-util-filemonitor$(EXESUF)
check-unit-y += tests/test-util-sockets$(EXESUF)
check-unit-y += tests/test-authz-simple$(EXESUF)
check-unit-y += tests/test-authz-list$(EXESUF)
check-unit-y += tests/test-authz-listfile$(EXESUF)
check-unit-$(CONFIG_AUTH_PAM) += tests/test-authz-pam$(EXESUF)
check-unit-y += tests/test-io-task$(EXESUF)
check-unit-y += tests/test-io-channel-socket$(EXESUF)
check-unit-y += tests/test-io-channel-file$(EXESUF)
@ -532,9 +537,10 @@ test-qom-obj-y = $(qom-obj-y) $(test-util-obj-y)
test-qapi-obj-y = tests/test-qapi-visit.o tests/test-qapi-types.o \
tests/test-qapi-introspect.o \
$(test-qom-obj-y)
benchmark-crypto-obj-y = $(crypto-obj-y) $(test-qom-obj-y)
test-crypto-obj-y = $(crypto-obj-y) $(test-qom-obj-y)
benchmark-crypto-obj-y = $(authz-obj-y) $(crypto-obj-y) $(test-qom-obj-y)
test-crypto-obj-y = $(authz-obj-y) $(crypto-obj-y) $(test-qom-obj-y)
test-io-obj-y = $(io-obj-y) $(test-crypto-obj-y)
test-authz-obj-y = $(test-qom-obj-y) $(authz-obj-y)
test-block-obj-y = $(block-obj-y) $(test-io-obj-y) tests/iothread.o
tests/check-qnum$(EXESUF): tests/check-qnum.o $(test-util-obj-y)
@ -657,8 +663,14 @@ tests/test-crypto-tlssession$(EXESUF): tests/test-crypto-tlssession.o \
tests/crypto-tls-x509-helpers.o tests/pkix_asn1_tab.o \
tests/crypto-tls-psk-helpers.o \
$(test-crypto-obj-y)
tests/test-util-filemonitor$(EXESUF): tests/test-util-filemonitor.o \
$(test-util-obj-y)
tests/test-util-sockets$(EXESUF): tests/test-util-sockets.o \
tests/socket-helpers.o $(test-util-obj-y)
tests/test-authz-simple$(EXESUF): tests/test-authz-simple.o $(test-authz-obj-y)
tests/test-authz-list$(EXESUF): tests/test-authz-list.o $(test-authz-obj-y)
tests/test-authz-listfile$(EXESUF): tests/test-authz-listfile.o $(test-authz-obj-y)
tests/test-authz-pam$(EXESUF): tests/test-authz-pam.o $(test-authz-obj-y)
tests/test-io-task$(EXESUF): tests/test-io-task.o $(test-io-obj-y)
tests/test-io-channel-socket$(EXESUF): tests/test-io-channel-socket.o \
tests/io-channel-helpers.o tests/socket-helpers.o $(test-io-obj-y)

159
tests/test-authz-list.c Normal file
View file

@ -0,0 +1,159 @@
/*
* QEMU list file authorization object tests
*
* Copyright (c) 2018 Red Hat, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*
*/
#include "qemu/osdep.h"
#include "authz/list.h"
static void test_authz_default_deny(void)
{
QAuthZList *auth = qauthz_list_new("auth0",
QAUTHZ_LIST_POLICY_DENY,
&error_abort);
g_assert(!qauthz_is_allowed(QAUTHZ(auth), "fred", &error_abort));
object_unparent(OBJECT(auth));
}
static void test_authz_default_allow(void)
{
QAuthZList *auth = qauthz_list_new("auth0",
QAUTHZ_LIST_POLICY_ALLOW,
&error_abort);
g_assert(qauthz_is_allowed(QAUTHZ(auth), "fred", &error_abort));
object_unparent(OBJECT(auth));
}
static void test_authz_explicit_deny(void)
{
QAuthZList *auth = qauthz_list_new("auth0",
QAUTHZ_LIST_POLICY_ALLOW,
&error_abort);
qauthz_list_append_rule(auth, "fred", QAUTHZ_LIST_POLICY_DENY,
QAUTHZ_LIST_FORMAT_EXACT, &error_abort);
g_assert(!qauthz_is_allowed(QAUTHZ(auth), "fred", &error_abort));
object_unparent(OBJECT(auth));
}
static void test_authz_explicit_allow(void)
{
QAuthZList *auth = qauthz_list_new("auth0",
QAUTHZ_LIST_POLICY_DENY,
&error_abort);
qauthz_list_append_rule(auth, "fred", QAUTHZ_LIST_POLICY_ALLOW,
QAUTHZ_LIST_FORMAT_EXACT, &error_abort);
g_assert(qauthz_is_allowed(QAUTHZ(auth), "fred", &error_abort));
object_unparent(OBJECT(auth));
}
static void test_authz_complex(void)
{
QAuthZList *auth = qauthz_list_new("auth0",
QAUTHZ_LIST_POLICY_DENY,
&error_abort);
qauthz_list_append_rule(auth, "fred", QAUTHZ_LIST_POLICY_ALLOW,
QAUTHZ_LIST_FORMAT_EXACT, &error_abort);
qauthz_list_append_rule(auth, "bob", QAUTHZ_LIST_POLICY_ALLOW,
QAUTHZ_LIST_FORMAT_EXACT, &error_abort);
qauthz_list_append_rule(auth, "dan", QAUTHZ_LIST_POLICY_DENY,
QAUTHZ_LIST_FORMAT_EXACT, &error_abort);
qauthz_list_append_rule(auth, "dan*", QAUTHZ_LIST_POLICY_ALLOW,
QAUTHZ_LIST_FORMAT_GLOB, &error_abort);
g_assert(qauthz_is_allowed(QAUTHZ(auth), "fred", &error_abort));
g_assert(qauthz_is_allowed(QAUTHZ(auth), "bob", &error_abort));
g_assert(!qauthz_is_allowed(QAUTHZ(auth), "dan", &error_abort));
g_assert(qauthz_is_allowed(QAUTHZ(auth), "danb", &error_abort));
object_unparent(OBJECT(auth));
}
static void test_authz_add_remove(void)
{
QAuthZList *auth = qauthz_list_new("auth0",
QAUTHZ_LIST_POLICY_ALLOW,
&error_abort);
g_assert_cmpint(qauthz_list_append_rule(auth, "fred",
QAUTHZ_LIST_POLICY_ALLOW,
QAUTHZ_LIST_FORMAT_EXACT,
&error_abort),
==, 0);
g_assert_cmpint(qauthz_list_append_rule(auth, "bob",
QAUTHZ_LIST_POLICY_ALLOW,
QAUTHZ_LIST_FORMAT_EXACT,
&error_abort),
==, 1);
g_assert_cmpint(qauthz_list_append_rule(auth, "dan",
QAUTHZ_LIST_POLICY_DENY,
QAUTHZ_LIST_FORMAT_EXACT,
&error_abort),
==, 2);
g_assert_cmpint(qauthz_list_append_rule(auth, "frank",
QAUTHZ_LIST_POLICY_DENY,
QAUTHZ_LIST_FORMAT_EXACT,
&error_abort),
==, 3);
g_assert(!qauthz_is_allowed(QAUTHZ(auth), "dan", &error_abort));
g_assert_cmpint(qauthz_list_delete_rule(auth, "dan"),
==, 2);
g_assert(qauthz_is_allowed(QAUTHZ(auth), "dan", &error_abort));
g_assert_cmpint(qauthz_list_insert_rule(auth, "dan",
QAUTHZ_LIST_POLICY_DENY,
QAUTHZ_LIST_FORMAT_EXACT,
2,
&error_abort),
==, 2);
g_assert(!qauthz_is_allowed(QAUTHZ(auth), "dan", &error_abort));
object_unparent(OBJECT(auth));
}
int main(int argc, char **argv)
{
g_test_init(&argc, &argv, NULL);
module_call_init(MODULE_INIT_QOM);
g_test_add_func("/auth/list/default/deny", test_authz_default_deny);
g_test_add_func("/auth/list/default/allow", test_authz_default_allow);
g_test_add_func("/auth/list/explicit/deny", test_authz_explicit_deny);
g_test_add_func("/auth/list/explicit/allow", test_authz_explicit_allow);
g_test_add_func("/auth/list/complex", test_authz_complex);
g_test_add_func("/auth/list/add-remove", test_authz_add_remove);
return g_test_run();
}

195
tests/test-authz-listfile.c Normal file
View file

@ -0,0 +1,195 @@
/*
* QEMU list authorization object tests
*
* Copyright (c) 2018 Red Hat, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*
*/
#include "qemu/osdep.h"
#include "qemu/main-loop.h"
#include "authz/listfile.h"
static char *workdir;
static gchar *qemu_authz_listfile_test_save(const gchar *name,
const gchar *cfg)
{
gchar *path = g_strdup_printf("%s/default-deny.cfg", workdir);
GError *gerr = NULL;
if (!g_file_set_contents(path, cfg, -1, &gerr)) {
g_printerr("Unable to save config %s: %s\n",
path, gerr->message);
g_error_free(gerr);
g_free(path);
rmdir(workdir);
abort();
}
return path;
}
static void test_authz_default_deny(void)
{
gchar *file = qemu_authz_listfile_test_save(
"default-deny.cfg",
"{ \"policy\": \"deny\" }");
Error *local_err = NULL;
QAuthZListFile *auth = qauthz_list_file_new("auth0",
file, false,
&local_err);
unlink(file);
g_free(file);
g_assert(local_err == NULL);
g_assert(!qauthz_is_allowed(QAUTHZ(auth), "fred", &error_abort));
object_unparent(OBJECT(auth));
}
static void test_authz_default_allow(void)
{
gchar *file = qemu_authz_listfile_test_save(
"default-allow.cfg",
"{ \"policy\": \"allow\" }");
Error *local_err = NULL;
QAuthZListFile *auth = qauthz_list_file_new("auth0",
file, false,
&local_err);
unlink(file);
g_free(file);
g_assert(local_err == NULL);
g_assert(qauthz_is_allowed(QAUTHZ(auth), "fred", &error_abort));
object_unparent(OBJECT(auth));
}
static void test_authz_explicit_deny(void)
{
gchar *file = qemu_authz_listfile_test_save(
"explicit-deny.cfg",
"{ \"rules\": [ "
" { \"match\": \"fred\","
" \"policy\": \"deny\","
" \"format\": \"exact\" } ],"
" \"policy\": \"allow\" }");
Error *local_err = NULL;
QAuthZListFile *auth = qauthz_list_file_new("auth0",
file, false,
&local_err);
unlink(file);
g_free(file);
g_assert(local_err == NULL);
g_assert(!qauthz_is_allowed(QAUTHZ(auth), "fred", &error_abort));
object_unparent(OBJECT(auth));
}
static void test_authz_explicit_allow(void)
{
gchar *file = qemu_authz_listfile_test_save(
"explicit-allow.cfg",
"{ \"rules\": [ "
" { \"match\": \"fred\","
" \"policy\": \"allow\","
" \"format\": \"exact\" } ],"
" \"policy\": \"deny\" }");
Error *local_err = NULL;
QAuthZListFile *auth = qauthz_list_file_new("auth0",
file, false,
&local_err);
unlink(file);
g_free(file);
g_assert(local_err == NULL);
g_assert(qauthz_is_allowed(QAUTHZ(auth), "fred", &error_abort));
object_unparent(OBJECT(auth));
}
static void test_authz_complex(void)
{
gchar *file = qemu_authz_listfile_test_save(
"complex.cfg",
"{ \"rules\": [ "
" { \"match\": \"fred\","
" \"policy\": \"allow\","
" \"format\": \"exact\" },"
" { \"match\": \"bob\","
" \"policy\": \"allow\","
" \"format\": \"exact\" },"
" { \"match\": \"dan\","
" \"policy\": \"deny\","
" \"format\": \"exact\" },"
" { \"match\": \"dan*\","
" \"policy\": \"allow\","
" \"format\": \"glob\" } ],"
" \"policy\": \"deny\" }");
Error *local_err = NULL;
QAuthZListFile *auth = qauthz_list_file_new("auth0",
file, false,
&local_err);
unlink(file);
g_free(file);
g_assert(local_err == NULL);
g_assert(qauthz_is_allowed(QAUTHZ(auth), "fred", &error_abort));
g_assert(qauthz_is_allowed(QAUTHZ(auth), "bob", &error_abort));
g_assert(!qauthz_is_allowed(QAUTHZ(auth), "dan", &error_abort));
g_assert(qauthz_is_allowed(QAUTHZ(auth), "danb", &error_abort));
object_unparent(OBJECT(auth));
}
int main(int argc, char **argv)
{
int ret;
GError *gerr = NULL;
g_test_init(&argc, &argv, NULL);
module_call_init(MODULE_INIT_QOM);
workdir = g_dir_make_tmp("qemu-test-authz-listfile-XXXXXX",
&gerr);
if (!workdir) {
g_printerr("Unable to create temporary dir: %s\n",
gerr->message);
g_error_free(gerr);
abort();
}
g_test_add_func("/auth/list/default/deny", test_authz_default_deny);
g_test_add_func("/auth/list/default/allow", test_authz_default_allow);
g_test_add_func("/auth/list/explicit/deny", test_authz_explicit_deny);
g_test_add_func("/auth/list/explicit/allow", test_authz_explicit_allow);
g_test_add_func("/auth/list/complex", test_authz_complex);
ret = g_test_run();
rmdir(workdir);
g_free(workdir);
return ret;
}

124
tests/test-authz-pam.c Normal file
View file

@ -0,0 +1,124 @@
/*
* QEMU PAM authorization object tests
*
* Copyright (c) 2018 Red Hat, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*
*/
#include "qemu/osdep.h"
#include "qapi/error.h"
#include "authz/pamacct.h"
#include <security/pam_appl.h>
static bool failauth;
/*
* These two functions are exported by libpam.so.
*
* By defining them again here, our impls are resolved
* by the linker instead of those in libpam.so
*
* The test suite is thus isolated from the host system
* PAM setup, so we can do predictable test scenarios
*/
int
pam_start(const char *service_name, const char *user,
const struct pam_conv *pam_conversation,
pam_handle_t **pamh)
{
failauth = true;
if (!g_str_equal(service_name, "qemu-vnc")) {
return PAM_AUTH_ERR;
}
if (g_str_equal(user, "fred")) {
failauth = false;
}
return PAM_SUCCESS;
}
int
pam_acct_mgmt(pam_handle_t *pamh, int flags)
{
if (failauth) {
return PAM_AUTH_ERR;
}
return PAM_SUCCESS;
}
static void test_authz_unknown_service(void)
{
Error *local_err = NULL;
QAuthZPAM *auth = qauthz_pam_new("auth0",
"qemu-does-not-exist",
&error_abort);
g_assert_nonnull(auth);
g_assert_false(qauthz_is_allowed(QAUTHZ(auth), "fred", &local_err));
error_free_or_abort(&local_err);
object_unparent(OBJECT(auth));
}
static void test_authz_good_user(void)
{
QAuthZPAM *auth = qauthz_pam_new("auth0",
"qemu-vnc",
&error_abort);
g_assert_nonnull(auth);
g_assert_true(qauthz_is_allowed(QAUTHZ(auth), "fred", &error_abort));
object_unparent(OBJECT(auth));
}
static void test_authz_bad_user(void)
{
Error *local_err = NULL;
QAuthZPAM *auth = qauthz_pam_new("auth0",
"qemu-vnc",
&error_abort);
g_assert_nonnull(auth);
g_assert_false(qauthz_is_allowed(QAUTHZ(auth), "bob", &local_err));
error_free_or_abort(&local_err);
object_unparent(OBJECT(auth));
}
int main(int argc, char **argv)
{
g_test_init(&argc, &argv, NULL);
module_call_init(MODULE_INIT_QOM);
g_test_add_func("/auth/pam/unknown-service", test_authz_unknown_service);
g_test_add_func("/auth/pam/good-user", test_authz_good_user);
g_test_add_func("/auth/pam/bad-user", test_authz_bad_user);
return g_test_run();
}

50
tests/test-authz-simple.c Normal file
View file

@ -0,0 +1,50 @@
/*
* QEMU simple authorization object testing
*
* Copyright (c) 2018 Red Hat, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*
*/
#include "qemu/osdep.h"
#include "qapi/error.h"
#include "authz/simple.h"
static void test_authz_simple(void)
{
QAuthZSimple *authz = qauthz_simple_new("authz0",
"cthulu",
&error_abort);
g_assert(!qauthz_is_allowed(QAUTHZ(authz), "cthul", &error_abort));
g_assert(qauthz_is_allowed(QAUTHZ(authz), "cthulu", &error_abort));
g_assert(!qauthz_is_allowed(QAUTHZ(authz), "cthuluu", &error_abort));
g_assert(!qauthz_is_allowed(QAUTHZ(authz), "fred", &error_abort));
object_unparent(OBJECT(authz));
}
int main(int argc, char **argv)
{
g_test_init(&argc, &argv, NULL);
module_call_init(MODULE_INIT_QOM);
g_test_add_func("/authz/simple", test_authz_simple);
return g_test_run();
}

15
tests/test-crypto-tlssession.c
View file

@ -28,7 +28,7 @@
#include "qom/object_interfaces.h"
#include "qapi/error.h"
#include "qemu/sockets.h"
#include "qemu/acl.h"
#include "authz/list.h"
#ifdef QCRYPTO_HAVE_TLS_TEST_SUPPORT
@ -229,7 +229,7 @@ static void test_crypto_tls_session_x509(const void *opaque)
QCryptoTLSCreds *serverCreds;
QCryptoTLSSession *clientSess = NULL;
QCryptoTLSSession *serverSess = NULL;
qemu_acl *acl;
QAuthZList *auth;
const char * const *wildcards;
int channel[2];
bool clientShake = false;
@ -285,11 +285,15 @@ static void test_crypto_tls_session_x509(const void *opaque)
SERVER_CERT_DIR);
g_assert(serverCreds != NULL);
acl = qemu_acl_init("tlssessionacl");
qemu_acl_reset(acl);
auth = qauthz_list_new("tlssessionacl",
QAUTHZ_LIST_POLICY_DENY,
&error_abort);
wildcards = data->wildcards;
while (wildcards && *wildcards) {
qemu_acl_append(acl, 0, *wildcards);
qauthz_list_append_rule(auth, *wildcards,
QAUTHZ_LIST_POLICY_ALLOW,
QAUTHZ_LIST_FORMAT_GLOB,
&error_abort);
wildcards++;
}
@ -377,6 +381,7 @@ static void test_crypto_tls_session_x509(const void *opaque)
object_unparent(OBJECT(serverCreds));
object_unparent(OBJECT(clientCreds));
object_unparent(OBJECT(auth));
qcrypto_tls_session_free(serverSess);
qcrypto_tls_session_free(clientSess);

16
tests/test-io-channel-tls.c
View file

@ -29,8 +29,8 @@
#include "io-channel-helpers.h"
#include "crypto/init.h"
#include "crypto/tlscredsx509.h"
#include "qemu/acl.h"
#include "qapi/error.h"
#include "authz/list.h"
#include "qom/object_interfaces.h"
#ifdef QCRYPTO_HAVE_TLS_TEST_SUPPORT
@ -113,7 +113,7 @@ static void test_io_channel_tls(const void *opaque)
QIOChannelTLS *serverChanTLS;
QIOChannelSocket *clientChanSock;
QIOChannelSocket *serverChanSock;
qemu_acl *acl;
QAuthZList *auth;
const char * const *wildcards;
int channel[2];
struct QIOChannelTLSHandshakeData clientHandshake = { false, false };
@ -161,11 +161,15 @@ static void test_io_channel_tls(const void *opaque)
SERVER_CERT_DIR);
g_assert(serverCreds != NULL);
acl = qemu_acl_init("channeltlsacl");
qemu_acl_reset(acl);
auth = qauthz_list_new("channeltlsacl",
QAUTHZ_LIST_POLICY_DENY,
&error_abort);
wildcards = data->wildcards;
while (wildcards && *wildcards) {
qemu_acl_append(acl, 0, *wildcards);
qauthz_list_append_rule(auth, *wildcards,
QAUTHZ_LIST_POLICY_ALLOW,
QAUTHZ_LIST_FORMAT_GLOB,
&error_abort);
wildcards++;
}
@ -253,6 +257,8 @@ static void test_io_channel_tls(const void *opaque)
object_unref(OBJECT(serverChanSock));
object_unref(OBJECT(clientChanSock));
object_unparent(OBJECT(auth));
close(channel[0]);
close(channel[1]);
}

685
tests/test-util-filemonitor.c Normal file
View file

@ -0,0 +1,685 @@
/*
* Tests for util/filemonitor-*.c
*
* Copyright 2018 Red Hat, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this library; if not, see <http://www.gnu.org/licenses/>.
*
*/
#include "qemu/osdep.h"
#include "qemu/main-loop.h"
#include "qapi/error.h"
#include "qemu/filemonitor.h"
#include <utime.h>
enum {
QFILE_MONITOR_TEST_OP_CREATE,
QFILE_MONITOR_TEST_OP_APPEND,
QFILE_MONITOR_TEST_OP_TRUNC,
QFILE_MONITOR_TEST_OP_RENAME,
QFILE_MONITOR_TEST_OP_TOUCH,
QFILE_MONITOR_TEST_OP_UNLINK,
};
typedef struct {
int type;
const char *filesrc;
const char *filedst;
} QFileMonitorTestOp;
typedef struct {
const char *file;
} QFileMonitorTestWatch;
typedef struct {
gsize nwatches;
const QFileMonitorTestWatch *watches;
gsize nops;
const QFileMonitorTestOp *ops;
} QFileMonitorTestPlan;
typedef struct {
int id;
QFileMonitorEvent event;
char *filename;
} QFileMonitorTestRecord;
typedef struct {
QemuMutex lock;
GList *records;
} QFileMonitorTestData;
static QemuMutex evlock;
static bool evstopping;
static bool evrunning;
/*
* Main function for a background thread that is
* running the event loop during the test
*/
static void *
qemu_file_monitor_test_event_loop(void *opaque G_GNUC_UNUSED)
{
qemu_mutex_lock(&evlock);
while (!evstopping) {
qemu_mutex_unlock(&evlock);
main_loop_wait(true);
qemu_mutex_lock(&evlock);
}
evrunning = false;
qemu_mutex_unlock(&evlock);
return NULL;
}
/*
* File monitor event handler which simply maintains
* an ordered list of all events that it receives
*/
static void
qemu_file_monitor_test_handler(int id,
QFileMonitorEvent event,
const char *filename,
void *opaque)
{
QFileMonitorTestData *data = opaque;
QFileMonitorTestRecord *rec = g_new0(QFileMonitorTestRecord, 1);
rec->id = id;
rec->event = event;
rec->filename = g_strdup(filename);
qemu_mutex_lock(&data->lock);
data->records = g_list_append(data->records, rec);
qemu_mutex_unlock(&data->lock);
}
static void
qemu_file_monitor_test_record_free(QFileMonitorTestRecord *rec)
{
g_free(rec->filename);
g_free(rec);
}
/*
* Get the next event record that has been received by
* the file monitor event handler. Since events are
* emitted in the background thread running the event
* loop, we can't assume there is a record available
* immediately. Thus we will sleep for upto 5 seconds
* to wait for the event to be queued for us.
*/
static QFileMonitorTestRecord *
qemu_file_monitor_test_next_record(QFileMonitorTestData *data)
{
GTimer *timer = g_timer_new();
QFileMonitorTestRecord *record = NULL;
GList *tmp;
qemu_mutex_lock(&data->lock);
while (!data->records && g_timer_elapsed(timer, NULL) < 5) {
qemu_mutex_unlock(&data->lock);
usleep(10 * 1000);
qemu_mutex_lock(&data->lock);
}
if (data->records) {
record = data->records->data;
tmp = data->records;
data->records = g_list_remove_link(data->records, tmp);
g_list_free(tmp);
}
qemu_mutex_unlock(&data->lock);
g_timer_destroy(timer);
return record;
}
/*
* Check whether the event record we retrieved matches
* data we were expecting to see for the event
*/
static bool
qemu_file_monitor_test_expect(QFileMonitorTestData *data,
int id,
QFileMonitorEvent event,
const char *filename)
{
QFileMonitorTestRecord *rec;
bool ret = false;
rec = qemu_file_monitor_test_next_record(data);
if (!rec) {
g_printerr("Missing event watch id %d event %d file %s\n",
id, event, filename);
return false;
}
if (id != rec->id) {
g_printerr("Expected watch id %d but got %d\n", id, rec->id);
goto cleanup;
}
if (event != rec->event) {
g_printerr("Expected event %d but got %d\n", event, rec->event);
goto cleanup;
}
if (!g_str_equal(filename, rec->filename)) {
g_printerr("Expected filename %s but got %s\n",
filename, rec->filename);
goto cleanup;
}
ret = true;
cleanup:
qemu_file_monitor_test_record_free(rec);
return ret;
}
static void
test_file_monitor_events(const void *opaque)
{
const QFileMonitorTestPlan *plan = opaque;
Error *local_err = NULL;
GError *gerr = NULL;
QFileMonitor *mon = qemu_file_monitor_new(&local_err);
QemuThread th;
GTimer *timer;
gchar *dir = NULL;
int err = -1;
gsize i, j;
char *pathsrc = NULL;
char *pathdst = NULL;
QFileMonitorTestData data;
qemu_mutex_init(&data.lock);
data.records = NULL;
/*
* The file monitor needs the main loop running in
* order to receive events from inotify. We must
* thus spawn a background thread to run an event
* loop impl, while this thread triggers the
* actual file operations we're testing
*/
evrunning = 1;
evstopping = 0;
qemu_thread_create(&th, "event-loop",
qemu_file_monitor_test_event_loop, NULL,
QEMU_THREAD_JOINABLE);
if (local_err) {
g_printerr("File monitoring not available: %s",
error_get_pretty(local_err));
error_free(local_err);
return;
}
dir = g_dir_make_tmp("test-util-filemonitor-XXXXXX",
&gerr);
if (!dir) {
g_printerr("Unable to create tmp dir %s",
gerr->message);
g_error_free(gerr);
abort();
}
/*
* First register all the directory / file watches
* we're interested in seeing events against
*/
for (i = 0; i < plan->nwatches; i++) {
int watchid;
watchid = qemu_file_monitor_add_watch(mon,
dir,
plan->watches[i].file,
qemu_file_monitor_test_handler,
&data,
&local_err);
if (watchid < 0) {
g_printerr("Unable to add watch %s",
error_get_pretty(local_err));
goto cleanup;
}
}
/*
* Now invoke all the file operations (create,
* delete, rename, chmod, etc). These operations
* will trigger the various file monitor events
*/
for (i = 0; i < plan->nops; i++) {
const QFileMonitorTestOp *op = &(plan->ops[i]);
int fd;
struct utimbuf ubuf;
pathsrc = g_strdup_printf("%s/%s", dir, op->filesrc);
if (op->filedst) {
pathdst = g_strdup_printf("%s/%s", dir, op->filedst);
}
switch (op->type) {
case QFILE_MONITOR_TEST_OP_CREATE:
fd = open(pathsrc, O_WRONLY | O_CREAT, 0700);
if (fd < 0) {
g_printerr("Unable to create %s: %s",
pathsrc, strerror(errno));
goto cleanup;
}
close(fd);
break;
case QFILE_MONITOR_TEST_OP_APPEND:
fd = open(pathsrc, O_WRONLY | O_APPEND, 0700);
if (fd < 0) {
g_printerr("Unable to open %s: %s",
pathsrc, strerror(errno));
goto cleanup;
}
if (write(fd, "Hello World", 10) != 10) {
g_printerr("Unable to write %s: %s",
pathsrc, strerror(errno));
close(fd);
goto cleanup;
}
close(fd);
break;
case QFILE_MONITOR_TEST_OP_TRUNC:
if (truncate(pathsrc, 4) < 0) {
g_printerr("Unable to truncate %s: %s",
pathsrc, strerror(errno));
goto cleanup;
}
break;
case QFILE_MONITOR_TEST_OP_RENAME:
if (rename(pathsrc, pathdst) < 0) {
g_printerr("Unable to rename %s to %s: %s",
pathsrc, pathdst, strerror(errno));
goto cleanup;
}
break;
case QFILE_MONITOR_TEST_OP_UNLINK:
if (unlink(pathsrc) < 0) {
g_printerr("Unable to unlink %s: %s",
pathsrc, strerror(errno));
goto cleanup;
}
break;
case QFILE_MONITOR_TEST_OP_TOUCH:
ubuf.actime = 1024;
ubuf.modtime = 1025;
if (utime(pathsrc, &ubuf) < 0) {
g_printerr("Unable to touch %s: %s",
pathsrc, strerror(errno));
goto cleanup;
}
break;
default:
g_assert_not_reached();
}
g_free(pathsrc);
g_free(pathdst);
pathsrc = pathdst = NULL;
}
/*
* Finally validate that we have received all the events
* we expect to see for the combination of watches and
* file operations
*/
for (i = 0; i < plan->nops; i++) {
const QFileMonitorTestOp *op = &(plan->ops[i]);
switch (op->type) {
case QFILE_MONITOR_TEST_OP_CREATE:
for (j = 0; j < plan->nwatches; j++) {
if (plan->watches[j].file &&
!g_str_equal(plan->watches[j].file, op->filesrc))
continue;
if (!qemu_file_monitor_test_expect(
&data, j, QFILE_MONITOR_EVENT_CREATED, op->filesrc))
goto cleanup;
}
break;
case QFILE_MONITOR_TEST_OP_APPEND:
case QFILE_MONITOR_TEST_OP_TRUNC:
for (j = 0; j < plan->nwatches; j++) {
if (plan->watches[j].file &&
!g_str_equal(plan->watches[j].file, op->filesrc))
continue;
if (!qemu_file_monitor_test_expect(
&data, j, QFILE_MONITOR_EVENT_MODIFIED, op->filesrc))
goto cleanup;
}
break;
case QFILE_MONITOR_TEST_OP_RENAME:
for (j = 0; j < plan->nwatches; j++) {
if (plan->watches[j].file &&
!g_str_equal(plan->watches[j].file, op->filesrc))
continue;
if (!qemu_file_monitor_test_expect(
&data, j, QFILE_MONITOR_EVENT_DELETED, op->filesrc))
goto cleanup;
}
for (j = 0; j < plan->nwatches; j++) {
if (plan->watches[j].file &&
!g_str_equal(plan->watches[j].file, op->filedst))
continue;
if (!qemu_file_monitor_test_expect(
&data, j, QFILE_MONITOR_EVENT_CREATED, op->filedst))
goto cleanup;
}
break;
case QFILE_MONITOR_TEST_OP_TOUCH:
for (j = 0; j < plan->nwatches; j++) {
if (plan->watches[j].file &&
!g_str_equal(plan->watches[j].file, op->filesrc))
continue;
if (!qemu_file_monitor_test_expect(
&data, j, QFILE_MONITOR_EVENT_ATTRIBUTES, op->filesrc))
goto cleanup;
}
break;
case QFILE_MONITOR_TEST_OP_UNLINK:
for (j = 0; j < plan->nwatches; j++) {
if (plan->watches[j].file &&
!g_str_equal(plan->watches[j].file, op->filesrc))
continue;
if (!qemu_file_monitor_test_expect(
&data, j, QFILE_MONITOR_EVENT_DELETED, op->filesrc))
goto cleanup;
}
break;
default:
g_assert_not_reached();
}
}
err = 0;
cleanup:
g_free(pathsrc);
g_free(pathdst);
qemu_mutex_lock(&evlock);
evstopping = 1;
timer = g_timer_new();
while (evrunning && g_timer_elapsed(timer, NULL) < 5) {
qemu_mutex_unlock(&evlock);
usleep(10 * 1000);
qemu_mutex_lock(&evlock);
}
qemu_mutex_unlock(&evlock);
if (g_timer_elapsed(timer, NULL) >= 5) {
g_printerr("Event loop failed to quit after 5 seconds\n");
}
g_timer_destroy(timer);
for (i = 0; i < plan->nops; i++) {
const QFileMonitorTestOp *op = &(plan->ops[i]);
pathsrc = g_strdup_printf("%s/%s", dir, op->filesrc);
unlink(pathsrc);
g_free(pathsrc);
if (op->filedst) {
pathdst = g_strdup_printf("%s/%s", dir, op->filedst);
unlink(pathdst);
g_free(pathdst);
}
}
qemu_file_monitor_free(mon);
g_list_foreach(data.records,
(GFunc)qemu_file_monitor_test_record_free, NULL);
g_list_free(data.records);
qemu_mutex_destroy(&data.lock);
if (dir) {
rmdir(dir);
}
g_free(dir);
g_assert(err == 0);
}
/*
* Set of structs which define which file name patterns
* we're trying to watch against. NULL, means all files
* in the directory
*/
static const QFileMonitorTestWatch watches_any[] = {
{ NULL },
};
static const QFileMonitorTestWatch watches_one[] = {
{ "one.txt" },
};
static const QFileMonitorTestWatch watches_two[] = {
{ "two.txt" },
};
static const QFileMonitorTestWatch watches_many[] = {
{ NULL },
{ "one.txt" },
{ "two.txt" },
};
/*
* Various sets of file operations we're going to
* trigger and validate events for
*/
static const QFileMonitorTestOp ops_create_one[] = {
{ .type = QFILE_MONITOR_TEST_OP_CREATE,
.filesrc = "one.txt", }
};
static const QFileMonitorTestOp ops_delete_one[] = {
{ .type = QFILE_MONITOR_TEST_OP_CREATE,
.filesrc = "one.txt", },
{ .type = QFILE_MONITOR_TEST_OP_UNLINK,
.filesrc = "one.txt", }
};
static const QFileMonitorTestOp ops_create_many[] = {
{ .type = QFILE_MONITOR_TEST_OP_CREATE,
.filesrc = "one.txt", },
{ .type = QFILE_MONITOR_TEST_OP_CREATE,
.filesrc = "two.txt", },
{ .type = QFILE_MONITOR_TEST_OP_CREATE,
.filesrc = "three.txt", }
};
static const QFileMonitorTestOp ops_rename_one[] = {
{ .type = QFILE_MONITOR_TEST_OP_CREATE,
.filesrc = "one.txt", },
{ .type = QFILE_MONITOR_TEST_OP_RENAME,
.filesrc = "one.txt", .filedst = "two.txt" }
};
static const QFileMonitorTestOp ops_rename_many[] = {
{ .type = QFILE_MONITOR_TEST_OP_CREATE,
.filesrc = "one.txt", },
{ .type = QFILE_MONITOR_TEST_OP_CREATE,
.filesrc = "two.txt", },
{ .type = QFILE_MONITOR_TEST_OP_RENAME,
.filesrc = "one.txt", .filedst = "two.txt" }
};
static const QFileMonitorTestOp ops_append_one[] = {
{ .type = QFILE_MONITOR_TEST_OP_CREATE,
.filesrc = "one.txt", },
{ .type = QFILE_MONITOR_TEST_OP_APPEND,
.filesrc = "one.txt", },
};
static const QFileMonitorTestOp ops_trunc_one[] = {
{ .type = QFILE_MONITOR_TEST_OP_CREATE,
.filesrc = "one.txt", },
{ .type = QFILE_MONITOR_TEST_OP_TRUNC,
.filesrc = "one.txt", },
};
static const QFileMonitorTestOp ops_touch_one[] = {
{ .type = QFILE_MONITOR_TEST_OP_CREATE,
.filesrc = "one.txt", },
{ .type = QFILE_MONITOR_TEST_OP_TOUCH,
.filesrc = "one.txt", },
};
/*
* No we define data sets for the combinatorial
* expansion of file watches and operation sets
*/
#define PLAN_DATA(o, w) \
static const QFileMonitorTestPlan plan_ ## o ## _ ## w = { \
.nops = G_N_ELEMENTS(ops_ ##o), \
.ops = ops_ ##o, \
.nwatches = G_N_ELEMENTS(watches_ ##w), \
.watches = watches_ ## w, \
}
PLAN_DATA(create_one, any);
PLAN_DATA(create_one, one);
PLAN_DATA(create_one, two);
PLAN_DATA(create_one, many);
PLAN_DATA(delete_one, any);
PLAN_DATA(delete_one, one);
PLAN_DATA(delete_one, two);
PLAN_DATA(delete_one, many);
PLAN_DATA(create_many, any);
PLAN_DATA(create_many, one);
PLAN_DATA(create_many, two);
PLAN_DATA(create_many, many);
PLAN_DATA(rename_one, any);
PLAN_DATA(rename_one, one);
PLAN_DATA(rename_one, two);
PLAN_DATA(rename_one, many);
PLAN_DATA(rename_many, any);
PLAN_DATA(rename_many, one);
PLAN_DATA(rename_many, two);
PLAN_DATA(rename_many, many);
PLAN_DATA(append_one, any);
PLAN_DATA(append_one, one);
PLAN_DATA(append_one, two);
PLAN_DATA(append_one, many);
PLAN_DATA(trunc_one, any);
PLAN_DATA(trunc_one, one);
PLAN_DATA(trunc_one, two);
PLAN_DATA(trunc_one, many);
PLAN_DATA(touch_one, any);
PLAN_DATA(touch_one, one);
PLAN_DATA(touch_one, two);
PLAN_DATA(touch_one, many);
int main(int argc, char **argv)
{
g_test_init(&argc, &argv, NULL);
qemu_init_main_loop(&error_abort);
qemu_mutex_init(&evlock);
/*
* Register test cases for the combinatorial
* expansion of file watches and operation sets
*/
#define PLAN_REGISTER(o, w) \
g_test_add_data_func("/util/filemonitor/" # o "/" # w, \
&plan_ ## o ## _ ## w, test_file_monitor_events)
PLAN_REGISTER(create_one, any);
PLAN_REGISTER(create_one, one);
PLAN_REGISTER(create_one, two);
PLAN_REGISTER(create_one, many);
PLAN_REGISTER(delete_one, any);
PLAN_REGISTER(delete_one, one);
PLAN_REGISTER(delete_one, two);
PLAN_REGISTER(delete_one, many);
PLAN_REGISTER(create_many, any);
PLAN_REGISTER(create_many, one);
PLAN_REGISTER(create_many, two);
PLAN_REGISTER(create_many, many);
PLAN_REGISTER(rename_one, any);
PLAN_REGISTER(rename_one, one);
PLAN_REGISTER(rename_one, two);
PLAN_REGISTER(rename_one, many);
PLAN_REGISTER(rename_many, any);
PLAN_REGISTER(rename_many, one);
PLAN_REGISTER(rename_many, two);
PLAN_REGISTER(rename_many, many);
PLAN_REGISTER(append_one, any);
PLAN_REGISTER(append_one, one);
PLAN_REGISTER(append_one, two);
PLAN_REGISTER(append_one, many);
PLAN_REGISTER(trunc_one, any);
PLAN_REGISTER(trunc_one, one);
PLAN_REGISTER(trunc_one, two);
PLAN_REGISTER(trunc_one, many);
PLAN_REGISTER(touch_one, any);
PLAN_REGISTER(touch_one, one);
PLAN_REGISTER(touch_one, two);
PLAN_REGISTER(touch_one, many);
return g_test_run();
}

23
ui/vnc-auth-sasl.c
View file

@ -24,6 +24,7 @@
#include "qemu/osdep.h"
#include "qapi/error.h"
#include "authz/base.h"
#include "vnc.h"
#include "trace.h"
@ -146,13 +147,14 @@ size_t vnc_client_read_sasl(VncState *vs)
static int vnc_auth_sasl_check_access(VncState *vs)
{
const void *val;
int err;
int allow;
int rv;
Error *err = NULL;
bool allow;
err = sasl_getprop(vs->sasl.conn, SASL_USERNAME, &val);
if (err != SASL_OK) {
rv = sasl_getprop(vs->sasl.conn, SASL_USERNAME, &val);
if (rv != SASL_OK) {
trace_vnc_auth_fail(vs, vs->auth, "Cannot fetch SASL username",
sasl_errstring(err, NULL, NULL));
sasl_errstring(rv, NULL, NULL));
return -1;
}
if (val == NULL) {
@ -163,12 +165,19 @@ static int vnc_auth_sasl_check_access(VncState *vs)
vs->sasl.username = g_strdup((const char*)val);
trace_vnc_auth_sasl_username(vs, vs->sasl.username);
if (vs->vd->sasl.acl == NULL) {
if (vs->vd->sasl.authzid == NULL) {
trace_vnc_auth_sasl_acl(vs, 1);
return 0;
}
allow = qemu_acl_party_is_allowed(vs->vd->sasl.acl, vs->sasl.username);
allow = qauthz_is_allowed_by_id(vs->vd->sasl.authzid,
vs->sasl.username, &err);
if (err) {
trace_vnc_auth_fail(vs, vs->auth, "Error from authz",
error_get_pretty(err));
error_free(err);
return -1;
}
trace_vnc_auth_sasl_acl(vs, allow);
return allow ? 0 : -1;

5
ui/vnc-auth-sasl.h
View file

@ -30,8 +30,8 @@
typedef struct VncStateSASL VncStateSASL;
typedef struct VncDisplaySASL VncDisplaySASL;
#include "qemu/acl.h"
#include "qemu/main-loop.h"
#include "authz/base.h"
struct VncStateSASL {
sasl_conn_t *conn;
@ -60,7 +60,8 @@ struct VncStateSASL {
};
struct VncDisplaySASL {
qemu_acl *acl;
QAuthZ *authz;
char *authzid;
};
void vnc_sasl_client_cleanup(VncState *vs);

2
ui/vnc-auth-vencrypt.c
View file

@ -109,7 +109,7 @@ static int protocol_client_vencrypt_auth(VncState *vs, uint8_t *data, size_t len
tls = qio_channel_tls_new_server(
vs->ioc,
vs->vd->tlscreds,
vs->vd->tlsaclname,
vs->vd->tlsauthzid,
&err);
if (!tls) {
trace_vnc_auth_fail(vs, vs->auth, "TLS setup failed",

2
ui/vnc-ws.c
View file

@ -62,7 +62,7 @@ gboolean vncws_tls_handshake_io(QIOChannel *ioc G_GNUC_UNUSED,
tls = qio_channel_tls_new_server(
vs->ioc,
vs->vd->tlscreds,
vs->vd->tlsaclname,
vs->vd->tlsauthzid,
&err);
if (!tls) {
VNC_DEBUG("Failed to setup TLS %s\n", error_get_pretty(err));

37
ui/vnc.c
View file

@ -33,7 +33,7 @@
#include "qemu/option.h"
#include "qemu/sockets.h"
#include "qemu/timer.h"
#include "qemu/acl.h"
#include "authz/list.h"
#include "qemu/config-file.h"
#include "qapi/qapi-emit-events.h"
#include "qapi/qapi-events-ui.h"
@ -3229,12 +3229,24 @@ static void vnc_display_close(VncDisplay *vd)
object_unparent(OBJECT(vd->tlscreds));
vd->tlscreds = NULL;
}
g_free(vd->tlsaclname);
vd->tlsaclname = NULL;
if (vd->tlsauthz) {
object_unparent(OBJECT(vd->tlsauthz));
vd->tlsauthz = NULL;
}
g_free(vd->tlsauthzid);
vd->tlsauthzid = NULL;
if (vd->lock_key_sync) {
qemu_remove_led_event_handler(vd->led);
vd->led = NULL;
}
#ifdef CONFIG_VNC_SASL
if (vd->sasl.authz) {
object_unparent(OBJECT(vd->sasl.authz));
vd->sasl.authz = NULL;
}
g_free(vd->sasl.authzid);
vd->sasl.authzid = NULL;
#endif
}
int vnc_display_password(const char *id, const char *password)
@ -3887,23 +3899,24 @@ void vnc_display_open(const char *id, Error **errp)
if (acl) {
if (strcmp(vd->id, "default") == 0) {
vd->tlsaclname = g_strdup("vnc.x509dname");
vd->tlsauthzid = g_strdup("vnc.x509dname");
} else {
vd->tlsaclname = g_strdup_printf("vnc.%s.x509dname", vd->id);
vd->tlsauthzid = g_strdup_printf("vnc.%s.x509dname", vd->id);
}
qemu_acl_init(vd->tlsaclname);
vd->tlsauthz = QAUTHZ(qauthz_list_new(vd->tlsauthzid,
QAUTHZ_LIST_POLICY_DENY,
&error_abort));
}
#ifdef CONFIG_VNC_SASL
if (acl && sasl) {
char *aclname;
if (strcmp(vd->id, "default") == 0) {
aclname = g_strdup("vnc.username");
vd->sasl.authzid = g_strdup("vnc.username");
} else {
aclname = g_strdup_printf("vnc.%s.username", vd->id);
vd->sasl.authzid = g_strdup_printf("vnc.%s.username", vd->id);
}
vd->sasl.acl = qemu_acl_init(aclname);
g_free(aclname);
vd->sasl.authz = QAUTHZ(qauthz_list_new(vd->sasl.authzid,
QAUTHZ_LIST_POLICY_DENY,
&error_abort));
}
#endif

4
ui/vnc.h
View file

@ -39,6 +39,7 @@
#include "io/channel-socket.h"
#include "io/channel-tls.h"
#include "io/net-listener.h"
#include "authz/base.h"
#include <zlib.h>
#include "keymaps.h"
@ -178,7 +179,8 @@ struct VncDisplay
bool lossy;
bool non_adaptive;
QCryptoTLSCreds *tlscreds;
char *tlsaclname;
QAuthZ *tlsauthz;
char *tlsauthzid;
#ifdef CONFIG_VNC_SASL
VncDisplaySASL sasl;
#endif

4
util/Makefile.objs
View file

@ -20,7 +20,6 @@ util-obj-y += envlist.o path.o module.o
util-obj-y += host-utils.o
util-obj-y += bitmap.o bitops.o hbitmap.o
util-obj-y += fifo8.o
util-obj-y += acl.o
util-obj-y += cacheinfo.o
util-obj-y += error.o qemu-error.o
util-obj-y += id.o
@ -50,5 +49,8 @@ util-obj-y += range.o
util-obj-y += stats64.o
util-obj-y += systemd.o
util-obj-y += iova-tree.o
util-obj-$(CONFIG_INOTIFY1) += filemonitor-inotify.o
util-obj-$(CONFIG_LINUX) += vfio-helpers.o
util-obj-$(CONFIG_OPENGL) += drm.o
stub-obj-y += filemonitor-stub.o

179
util/acl.c
View file

@ -1,179 +0,0 @@
/*
* QEMU access control list management
*
* Copyright (C) 2009 Red Hat, Inc
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "qemu/osdep.h"
#include "qemu-common.h"
#include "qemu/acl.h"
#ifdef CONFIG_FNMATCH
#include <fnmatch.h>
#endif
static unsigned int nacls = 0;
static qemu_acl **acls = NULL;
qemu_acl *qemu_acl_find(const char *aclname)
{
int i;
for (i = 0 ; i < nacls ; i++) {
if (strcmp(acls[i]->aclname, aclname) == 0)
return acls[i];
}
return NULL;
}
qemu_acl *qemu_acl_init(const char *aclname)
{
qemu_acl *acl;
acl = qemu_acl_find(aclname);
if (acl)
return acl;
acl = g_malloc(sizeof(*acl));
acl->aclname = g_strdup(aclname);
/* Deny by default, so there is no window of "open
* access" between QEMU starting, and the user setting
* up ACLs in the monitor */
acl->defaultDeny = 1;
acl->nentries = 0;
QTAILQ_INIT(&acl->entries);
acls = g_realloc(acls, sizeof(*acls) * (nacls +1));
acls[nacls] = acl;
nacls++;
return acl;
}
int qemu_acl_party_is_allowed(qemu_acl *acl,
const char *party)
{
qemu_acl_entry *entry;
QTAILQ_FOREACH(entry, &acl->entries, next) {
#ifdef CONFIG_FNMATCH
if (fnmatch(entry->match, party, 0) == 0)
return entry->deny ? 0 : 1;
#else
/* No fnmatch, so fallback to exact string matching
* instead of allowing wildcards */
if (strcmp(entry->match, party) == 0)
return entry->deny ? 0 : 1;
#endif
}
return acl->defaultDeny ? 0 : 1;
}
void qemu_acl_reset(qemu_acl *acl)
{
qemu_acl_entry *entry, *next_entry;
/* Put back to deny by default, so there is no window
* of "open access" while the user re-initializes the
* access control list */
acl->defaultDeny = 1;
QTAILQ_FOREACH_SAFE(entry, &acl->entries, next, next_entry) {
QTAILQ_REMOVE(&acl->entries, entry, next);
g_free(entry->match);
g_free(entry);
}
acl->nentries = 0;
}
int qemu_acl_append(qemu_acl *acl,
int deny,
const char *match)
{
qemu_acl_entry *entry;
entry = g_malloc(sizeof(*entry));
entry->match = g_strdup(match);
entry->deny = deny;
QTAILQ_INSERT_TAIL(&acl->entries, entry, next);
acl->nentries++;
return acl->nentries;
}
int qemu_acl_insert(qemu_acl *acl,
int deny,
const char *match,
int index)
{
qemu_acl_entry *tmp;
int i = 0;
if (index <= 0)
return -1;
if (index > acl->nentries) {
return qemu_acl_append(acl, deny, match);
}
QTAILQ_FOREACH(tmp, &acl->entries, next) {
i++;
if (i == index) {
qemu_acl_entry *entry;
entry = g_malloc(sizeof(*entry));
entry->match = g_strdup(match);
entry->deny = deny;
QTAILQ_INSERT_BEFORE(tmp, entry, next);
acl->nentries++;
break;
}
}
return i;
}
int qemu_acl_remove(qemu_acl *acl,
const char *match)
{
qemu_acl_entry *entry;
int i = 0;
QTAILQ_FOREACH(entry, &acl->entries, next) {
i++;
if (strcmp(entry->match, match) == 0) {
QTAILQ_REMOVE(&acl->entries, entry, next);
acl->nentries--;
g_free(entry->match);
g_free(entry);
return i;
}
}
return -1;
}

339
util/filemonitor-inotify.c Normal file
View file

@ -0,0 +1,339 @@
/*
* QEMU file monitor Linux inotify impl
*
* Copyright (c) 2018 Red Hat, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*
*/
#include "qemu/osdep.h"
#include "qemu/filemonitor.h"
#include "qemu/main-loop.h"
#include "qemu/error-report.h"
#include "qapi/error.h"
#include "trace.h"
#include <sys/inotify.h>
struct QFileMonitor {
int fd;
QemuMutex lock; /* protects dirs & idmap */
GHashTable *dirs; /* dirname => QFileMonitorDir */
GHashTable *idmap; /* inotify ID => dirname */
};
typedef struct {
int id; /* watch ID */
char *filename; /* optional filter */
QFileMonitorHandler cb;
void *opaque;
} QFileMonitorWatch;
typedef struct {
char *path;
int id; /* inotify ID */
int nextid; /* watch ID counter */
GArray *watches; /* QFileMonitorWatch elements */
} QFileMonitorDir;
static void qemu_file_monitor_watch(void *arg)
{
QFileMonitor *mon = arg;
char buf[4096]
__attribute__ ((aligned(__alignof__(struct inotify_event))));
int used = 0;
int len;
qemu_mutex_lock(&mon->lock);
if (mon->fd == -1) {
qemu_mutex_unlock(&mon->lock);
return;
}
len = read(mon->fd, buf, sizeof(buf));
if (len < 0) {
if (errno != EAGAIN) {
error_report("Failure monitoring inotify FD '%s',"
"disabling events", strerror(errno));
goto cleanup;
}
/* no more events right now */
goto cleanup;
}
/* Loop over all events in the buffer */
while (used < len) {
struct inotify_event *ev =
(struct inotify_event *)(buf + used);
const char *name = ev->len ? ev->name : "";
QFileMonitorDir *dir = g_hash_table_lookup(mon->idmap,
GINT_TO_POINTER(ev->wd));
uint32_t iev = ev->mask &
(IN_CREATE | IN_MODIFY | IN_DELETE | IN_IGNORED |
IN_MOVED_TO | IN_MOVED_FROM | IN_ATTRIB);
int qev;
gsize i;
used += sizeof(struct inotify_event) + ev->len;
if (!dir) {
continue;
}
/*
* During a rename operation, the old name gets
* IN_MOVED_FROM and the new name gets IN_MOVED_TO.
* To simplify life for callers, we turn these into
* DELETED and CREATED events
*/
switch (iev) {
case IN_CREATE:
case IN_MOVED_TO:
qev = QFILE_MONITOR_EVENT_CREATED;
break;
case IN_MODIFY:
qev = QFILE_MONITOR_EVENT_MODIFIED;
break;
case IN_DELETE:
case IN_MOVED_FROM:
qev = QFILE_MONITOR_EVENT_DELETED;
break;
case IN_ATTRIB:
qev = QFILE_MONITOR_EVENT_ATTRIBUTES;
break;
case IN_IGNORED:
qev = QFILE_MONITOR_EVENT_IGNORED;
break;
default:
g_assert_not_reached();
}
trace_qemu_file_monitor_event(mon, dir->path, name, ev->mask, dir->id);
for (i = 0; i < dir->watches->len; i++) {
QFileMonitorWatch *watch = &g_array_index(dir->watches,
QFileMonitorWatch,
i);
if (watch->filename == NULL ||
(name && g_str_equal(watch->filename, name))) {
trace_qemu_file_monitor_dispatch(mon, dir->path, name,
qev, watch->cb,
watch->opaque, watch->id);
watch->cb(watch->id, qev, name, watch->opaque);
}
}
}
cleanup:
qemu_mutex_unlock(&mon->lock);
}
static void
qemu_file_monitor_dir_free(void *data)
{
QFileMonitorDir *dir = data;
gsize i;
for (i = 0; i < dir->watches->len; i++) {
QFileMonitorWatch *watch = &g_array_index(dir->watches,
QFileMonitorWatch, i);
g_free(watch->filename);
}
g_array_unref(dir->watches);
g_free(dir->path);
g_free(dir);
}
QFileMonitor *
qemu_file_monitor_new(Error **errp)
{
int fd;
QFileMonitor *mon;
fd = inotify_init1(IN_NONBLOCK);
if (fd < 0) {
error_setg_errno(errp, errno,
"Unable to initialize inotify");
return NULL;
}
mon = g_new0(QFileMonitor, 1);
qemu_mutex_init(&mon->lock);
mon->fd = fd;
mon->dirs = g_hash_table_new_full(g_str_hash, g_str_equal, NULL,
qemu_file_monitor_dir_free);
mon->idmap = g_hash_table_new(g_direct_hash, g_direct_equal);
trace_qemu_file_monitor_new(mon, mon->fd);
return mon;
}
static gboolean
qemu_file_monitor_free_idle(void *opaque)
{
QFileMonitor *mon = opaque;
if (!mon) {
return G_SOURCE_REMOVE;
}
qemu_mutex_lock(&mon->lock);
g_hash_table_unref(mon->idmap);
g_hash_table_unref(mon->dirs);
qemu_mutex_unlock(&mon->lock);
qemu_mutex_destroy(&mon->lock);
g_free(mon);
return G_SOURCE_REMOVE;
}
void
qemu_file_monitor_free(QFileMonitor *mon)
{
if (!mon) {
return;
}
qemu_mutex_lock(&mon->lock);
if (mon->fd != -1) {
qemu_set_fd_handler(mon->fd, NULL, NULL, NULL);
close(mon->fd);
mon->fd = -1;
}
qemu_mutex_unlock(&mon->lock);
/*
* Can't free it yet, because another thread
* may be running event loop, so the inotify
* callback might be pending. Using an idle
* source ensures we'll only free after the
* pending callback is done
*/
g_idle_add((GSourceFunc)qemu_file_monitor_free_idle, mon);
}
int
qemu_file_monitor_add_watch(QFileMonitor *mon,
const char *dirpath,
const char *filename,
QFileMonitorHandler cb,
void *opaque,
Error **errp)
{
QFileMonitorDir *dir;
QFileMonitorWatch watch;
int ret = -1;
qemu_mutex_lock(&mon->lock);
dir = g_hash_table_lookup(mon->dirs, dirpath);
if (!dir) {
int rv = inotify_add_watch(mon->fd, dirpath,
IN_CREATE | IN_DELETE | IN_MODIFY |
IN_MOVED_TO | IN_MOVED_FROM | IN_ATTRIB);
if (rv < 0) {
error_setg_errno(errp, errno, "Unable to watch '%s'", dirpath);
goto cleanup;
}
trace_qemu_file_monitor_enable_watch(mon, dirpath, rv);
dir = g_new0(QFileMonitorDir, 1);
dir->path = g_strdup(dirpath);
dir->id = rv;
dir->watches = g_array_new(FALSE, TRUE, sizeof(QFileMonitorWatch));
g_hash_table_insert(mon->dirs, dir->path, dir);
g_hash_table_insert(mon->idmap, GINT_TO_POINTER(rv), dir);
if (g_hash_table_size(mon->dirs) == 1) {
qemu_set_fd_handler(mon->fd, qemu_file_monitor_watch, NULL, mon);
}
}
watch.id = dir->nextid++;
watch.filename = g_strdup(filename);
watch.cb = cb;
watch.opaque = opaque;
g_array_append_val(dir->watches, watch);
trace_qemu_file_monitor_add_watch(mon, dirpath,
filename ? filename : "<none>",
cb, opaque, watch.id);
ret = watch.id;
cleanup:
qemu_mutex_unlock(&mon->lock);
return ret;
}
void qemu_file_monitor_remove_watch(QFileMonitor *mon,
const char *dirpath,
int id)
{
QFileMonitorDir *dir;
gsize i;
qemu_mutex_lock(&mon->lock);
trace_qemu_file_monitor_remove_watch(mon, dirpath, id);
dir = g_hash_table_lookup(mon->dirs, dirpath);
if (!dir) {
goto cleanup;
}
for (i = 0; i < dir->watches->len; i++) {
QFileMonitorWatch *watch = &g_array_index(dir->watches,
QFileMonitorWatch, i);
if (watch->id == id) {
g_free(watch->filename);
g_array_remove_index(dir->watches, i);
break;
}
}
if (dir->watches->len == 0) {
inotify_rm_watch(mon->fd, dir->id);
trace_qemu_file_monitor_disable_watch(mon, dir->path, dir->id);
g_hash_table_remove(mon->idmap, GINT_TO_POINTER(dir->id));
g_hash_table_remove(mon->dirs, dir->path);
if (g_hash_table_size(mon->dirs) == 0) {
qemu_set_fd_handler(mon->fd, NULL, NULL, NULL);
}
}
cleanup:
qemu_mutex_unlock(&mon->lock);
}

59
util/filemonitor-stub.c Normal file
View file

@ -0,0 +1,59 @@
/*
* QEMU file monitor stub impl
*
* Copyright (c) 2018 Red Hat, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*
*/
#include "qemu/osdep.h"
#include "qemu/filemonitor.h"
#include "qemu/error-report.h"
#include "qapi/error.h"
QFileMonitor *
qemu_file_monitor_new(Error **errp)
{
error_setg(errp, "File monitoring not available on this platform");
return NULL;
}
void
qemu_file_monitor_free(QFileMonitor *mon G_GNUC_UNUSED)
{
}
int
qemu_file_monitor_add_watch(QFileMonitor *mon G_GNUC_UNUSED,
const char *dirpath G_GNUC_UNUSED,
const char *filename G_GNUC_UNUSED,
QFileMonitorHandler cb G_GNUC_UNUSED,
void *opaque G_GNUC_UNUSED,
Error **errp)
{
error_setg(errp, "File monitoring not available on this platform");
return -1;
}
void
qemu_file_monitor_remove_watch(QFileMonitor *mon G_GNUC_UNUSED,
const char *dirpath G_GNUC_UNUSED,
int id G_GNUC_UNUSED)
{
}

9
util/trace-events
View file

@ -21,6 +21,15 @@ buffer_move_empty(const char *buf, size_t len, const char *from) "%s: %zd bytes
buffer_move(const char *buf, size_t len, const char *from) "%s: %zd bytes from %s"
buffer_free(const char *buf, size_t len) "%s: capacity %zd"
# util/filemonitor.c
qemu_file_monitor_add_watch(void *mon, const char *dirpath, const char *filename, void *cb, void *opaque, int id) "File monitor %p add watch dir='%s' file='%s' cb=%p opaque=%p id=%u"
qemu_file_monitor_remove_watch(void *mon, const char *dirpath, int id) "File monitor %p remove watch dir='%s' id=%u"
qemu_file_monitor_new(void *mon, int fd) "File monitor %p created fd=%d"
qemu_file_monitor_enable_watch(void *mon, const char *dirpath, int id) "File monitor %p enable watch dir='%s' id=%u"
qemu_file_monitor_disable_watch(void *mon, const char *dirpath, int id) "Fle monitor %p disable watch dir='%s' id=%u"
qemu_file_monitor_event(void *mon, const char *dirpath, const char *filename, int mask, unsigned int id) "File monitor %p event dir='%s' file='%s' mask=0x%x id=%u"
qemu_file_monitor_dispatch(void *mon, const char *dirpath, const char *filename, int ev, void *cb, void *opaque, unsigned int id) "File monitor %p dispatch dir='%s' file='%s' ev=%d cb=%p opaque=%p id=%u"
# util/qemu-coroutine.c
qemu_aio_coroutine_enter(void *ctx, void *from, void *to, void *opaque) "ctx %p from %p to %p opaque %p"
qemu_coroutine_yield(void *from, void *to) "from %p to %p"