[libvirt] [PATCH 1/4] Add APIs for formatting systemd slice/scope names
Daniel P. Berrange
berrange at redhat.com
Fri Jul 26 15:48:21 UTC 2013
From: "Daniel P. Berrange" <berrange at redhat.com>
There are some interesting escaping rules to consider when dealing
with systemd slice/scope names. Thus it is helpful to have APIs
for formatting names
Signed-off-by: Daniel P. Berrange <berrange at redhat.com>
---
src/libvirt_private.syms | 2 ++
src/util/virsystemd.c | 91 ++++++++++++++++++++++++++++++++++++++++++++++--
src/util/virsystemd.h | 5 +++
tests/virsystemdtest.c | 48 +++++++++++++++++++++++++
4 files changed, 144 insertions(+), 2 deletions(-)
diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms
index d9615ea..0247a46 100644
--- a/src/libvirt_private.syms
+++ b/src/libvirt_private.syms
@@ -1935,6 +1935,8 @@ virSysinfoSetup;
# util/virsystemd.h
virSystemdCreateMachine;
+virSystemdMakeScopeName;
+virSystemdMakeSliceName;
# util/virthread.h
diff --git a/src/util/virsystemd.c b/src/util/virsystemd.c
index 11d1153..251b846 100644
--- a/src/util/virsystemd.c
+++ b/src/util/virsystemd.c
@@ -27,9 +27,96 @@
#include "viralloc.h"
#include "virutil.h"
#include "virlog.h"
+#include "virerror.h"
#define VIR_FROM_THIS VIR_FROM_SYSTEMD
+
+static void virSystemdEscapeName(virBufferPtr buf,
+ const char *name)
+{
+ static const char hextable[16] = "0123456789abcdef";
+
+#define ESCAPE(c) \
+ do { \
+ virBufferAddChar(buf, '\\'); \
+ virBufferAddChar(buf, 'x'); \
+ virBufferAddChar(buf, hextable[(c >> 4) & 15]); \
+ virBufferAddChar(buf, hextable[c & 15]); \
+ } while (0)
+
+#define VALID_CHARS \
+ "0123456789" \
+ "abcdefghijklmnopqrstuvwxyz" \
+ "ABCDEFGHIJKLMNOPQRSTUVWXYZ" \
+ ":-_.\\"
+
+ if (*name == '.') {
+ ESCAPE(*name);
+ name++;
+ }
+
+ while (*name) {
+ if (*name == '/')
+ virBufferAddChar(buf, '-');
+ else if (*name == '-' ||
+ *name == '\\' ||
+ !strchr(VALID_CHARS, *name))
+ ESCAPE(*name);
+ else
+ virBufferAddChar(buf, *name);
+ name++;
+ }
+
+#undef ESCAPE
+#undef VALID_CHARS
+}
+
+
+char *virSystemdMakeScopeName(const char *name,
+ const char *drivername,
+ const char *partition)
+{
+ virBuffer buf = VIR_BUFFER_INITIALIZER;
+
+ if (*partition == '/')
+ partition++;
+
+ virSystemdEscapeName(&buf, partition);
+ virBufferAddChar(&buf, '-');
+ virSystemdEscapeName(&buf, drivername);
+ virBufferAddLit(&buf, "\\x2d");
+ virSystemdEscapeName(&buf, name);
+ virBufferAddLit(&buf, ".scope");
+
+ if (virBufferError(&buf)) {
+ virReportOOMError();
+ return NULL;
+ }
+
+ return virBufferContentAndReset(&buf);
+}
+
+
+char *virSystemdMakeSliceName(const char *partition)
+{
+ virBuffer buf = VIR_BUFFER_INITIALIZER;
+
+ if (*partition == '/')
+ partition++;
+
+ virSystemdEscapeName(&buf, partition);
+ virBufferAddLit(&buf, ".slice");
+
+ if (virBufferError(&buf)) {
+ virReportOOMError();
+ return NULL;
+ }
+
+ return virBufferContentAndReset(&buf);
+}
+
+
/**
* virSystemdCreateMachine:
* @name: driver unique name of the machine
@@ -75,8 +162,8 @@ int virSystemdCreateMachine(const char *name,
goto cleanup;
if (partition) {
- if (virAsprintf(&slicename, "%s.slice", partition) < 0)
- goto cleanup;
+ if (!(slicename = virSystemdMakeSliceName(partition)))
+ goto cleanup;
} else {
if (VIR_STRDUP(slicename, "") < 0)
goto cleanup;
diff --git a/src/util/virsystemd.h b/src/util/virsystemd.h
index 9ca4e0b..414ae5a 100644
--- a/src/util/virsystemd.h
+++ b/src/util/virsystemd.h
@@ -24,6 +24,11 @@
# include "internal.h"
+char *virSystemdMakeScopeName(const char *name,
+ const char *drivername,
+ const char *slicename);
+char *virSystemdMakeSliceName(const char *partition);
+
int virSystemdCreateMachine(const char *name,
const char *drivername,
bool privileged,
diff --git a/tests/virsystemdtest.c b/tests/virsystemdtest.c
index bcf3ad3..784c45c 100644
--- a/tests/virsystemdtest.c
+++ b/tests/virsystemdtest.c
@@ -138,6 +138,38 @@ static int testCreateBadSystemd(const void *opaque ATTRIBUTE_UNUSED)
return 0;
}
+
+struct testScopeData {
+ const char *name;
+ const char *partition;
+ const char *expected;
+};
+
+static int
+testScopeName(const void *opaque)
+{
+ const struct testScopeData *data = opaque;
+ int ret = -1;
+ char *actual = NULL;
+
+ if (!(actual = virSystemdMakeScopeName(data->name,
+ "lxc",
+ data->partition)))
+ goto cleanup;
+
+ if (STRNEQ(actual, data->expected)) {
+ fprintf(stderr, "Expected '%s' but got '%s'\n",
+ data->expected, actual);
+ goto cleanup;
+ }
+
+ ret = 0;
+
+ cleanup:
+ VIR_FREE(actual);
+ return ret;
+}
+
static int
mymain(void)
{
@@ -152,6 +184,22 @@ mymain(void)
if (virtTestRun("Test create bad systemd ", 1, testCreateBadSystemd, NULL) < 0)
ret = -1;
+#define TEST_SCOPE(name, partition, unitname) \
+ do { \
+ struct testScopeData data = { \
+ name, partition, unitname \
+ }; \
+ if (virtTestRun("Test scopename", 1, testScopeName, &data) < 0) \
+ ret = -1; \
+ } while (0)
+
+ TEST_SCOPE("demo", "/machine", "machine-lxc\\x2ddemo.scope");
+ TEST_SCOPE("demo-name", "/machine", "machine-lxc\\x2ddemo\\x2dname.scope");
+ TEST_SCOPE("demo!name", "/machine", "machine-lxc\\x2ddemo\\x21name.scope");
+ TEST_SCOPE(".demo", "/machine", "machine-lxc\\x2d\\x2edemo.scope");
+ TEST_SCOPE("demo", "/machine/eng-dept", "machine-eng\\x2ddept-lxc\\x2ddemo.scope");
+ TEST_SCOPE("demo", "/machine/eng-dept/testing!stuff", "machine-eng\\x2ddept-testing\\x21stuff-lxc\\x2ddemo.scope");
+
return ret==0 ? EXIT_SUCCESS : EXIT_FAILURE;
}
--
1.8.1.4
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