5:31 a.m.
Chagnes in v3:
- removed VIR_CGROUP_SUPPORTED
- include system headers only on linux
Pavel Hrdina (3):
vircgroup: remove VIR_CGROUP_SUPPORTED
vircgroup: include system headers only on linux
vircgroupv1: fix build on non-linux OSes
src/util/vircgroup.c | 38 ++++++++++++++++----------------------
src/util/vircgroupv1.c | 20 +++++++++++++++-----
2 files changed, 31 insertions(+), 27 deletions(-)
--
2.17.1
5:31 a.m.
New subject: [libvirt] [PATCH v3 1/3] vircgroup: remove VIR_CGROUP_SUPPORTED
tests/vircgrouptest.c uses #ifdef __linux__ for a long time and no
failure was reported so far so it's safe to assume that __linux__ is
good enough to guard cgroup code.
Signed-off-by: Pavel Hrdina <phrdina(a)redhat.com>
---
src/util/vircgroup.c | 11 +++--------
1 file changed, 3 insertions(+), 8 deletions(-)
diff --git a/src/util/vircgroup.c b/src/util/vircgroup.c
index 23957c82c7..7700a9f7a7 100644
--- a/src/util/vircgroup.c
+++ b/src/util/vircgroup.c
@@ -66,11 +66,6 @@ VIR_LOG_INIT("util.cgroup");
#define CGROUP_NB_TOTAL_CPU_STAT_PARAM 3
#define CGROUP_NB_PER_CPU_STAT_PARAM 1
-#if defined(__linux__) && defined(HAVE_GETMNTENT_R) && \
- defined(_DIRENT_HAVE_D_TYPE) && defined(_SC_CLK_TCK)
-# define VIR_CGROUP_SUPPORTED
-#endif
-
VIR_ENUM_IMPL(virCgroupController, VIR_CGROUP_CONTROLLER_LAST,
"cpu", "cpuacct", "cpuset",
"memory", "devices",
"freezer", "blkio", "net_cls",
"perf_event",
@@ -115,7 +110,7 @@ virCgroupGetDevicePermsString(int perms)
}
-#ifdef VIR_CGROUP_SUPPORTED
+#ifdef __linux__
bool
virCgroupAvailable(void)
{
@@ -2639,7 +2634,7 @@ virCgroupControllerAvailable(int controller)
return ret;
}
-#else /* !VIR_CGROUP_SUPPORTED */
+#else /* !__linux__ */
bool
virCgroupAvailable(void)
@@ -3400,7 +3395,7 @@ virCgroupControllerAvailable(int controller ATTRIBUTE_UNUSED)
{
return false;
}
-#endif /* !VIR_CGROUP_SUPPORTED */
+#endif /* !__linux__ */
int
--
2.17.1
5:31 a.m.
New subject: [libvirt] [PATCH v3 2/3] vircgroup: include system headers only on linux
All the system headers are used only if we are compiling on linux
and they all are present otherwise we would have seen build errors
because in our tests/vircgrouptest.c we use only __linux__ to check
whether to skip the cgroup tests or not.
Signed-off-by: Pavel Hrdina <phrdina(a)redhat.com>
---
src/util/vircgroup.c | 27 +++++++++++++--------------
1 file changed, 13 insertions(+), 14 deletions(-)
diff --git a/src/util/vircgroup.c b/src/util/vircgroup.c
index 7700a9f7a7..f90906e4ad 100644
--- a/src/util/vircgroup.c
+++ b/src/util/vircgroup.c
@@ -23,24 +23,23 @@
*/
#include <config.h>
-#if defined HAVE_MNTENT_H && defined HAVE_SYS_MOUNT_H \
- && defined HAVE_GETMNTENT_R
+#ifdef __linux__
# include <mntent.h>
# include <sys/mount.h>
-#endif
-#include <fcntl.h>
-#include <sys/stat.h>
+# include <fcntl.h>
+# include <sys/stat.h>
-#ifdef MAJOR_IN_MKDEV
-# include <sys/mkdev.h>
-#elif MAJOR_IN_SYSMACROS
-# include <sys/sysmacros.h>
-#endif
+# ifdef MAJOR_IN_MKDEV
+# include <sys/mkdev.h>
+# elif MAJOR_IN_SYSMACROS
+# include <sys/sysmacros.h>
+# endif
-#include <sys/types.h>
-#include <signal.h>
-#include <dirent.h>
-#include <unistd.h>
+# include <sys/types.h>
+# include <signal.h>
+# include <dirent.h>
+# include <unistd.h>
+#endif /* __linux__ */
#define __VIR_CGROUP_ALLOW_INCLUDE_PRIV_H__
#include "vircgrouppriv.h"
--
2.17.1
5:31 a.m.
New subject: [libvirt] [PATCH v3 3/3] vircgroupv1: fix build on non-linux OSes
Cgroups are linux specific and we need to make sure that the code is
compiled only on linux. On different OSes it fails the compilation:
../../src/util/vircgroupv1.c:65:19: error: variable has incomplete type 'struct
mntent'
struct mntent entry;
^
../../src/util/vircgroupv1.c:65:12: note: forward declaration of 'struct mntent'
struct mntent entry;
^
../../src/util/vircgroupv1.c:74:12: error: implicit declaration of function
'getmntent_r' is invalid in C99 [-Werror,-Wimplicit-function-declaration]
while (getmntent_r(mounts, &entry, buf, sizeof(buf)) != NULL) {
^
../../src/util/vircgroupv1.c:814:39: error: use of undeclared identifier
'MS_NOSUID'
if (mount("tmpfs", root, "tmpfs", MS_NOSUID|MS_NODEV|MS_NOEXEC,
opts) < 0) {
^
../../src/util/vircgroupv1.c:814:49: error: use of undeclared identifier
'MS_NODEV'
if (mount("tmpfs", root, "tmpfs", MS_NOSUID|MS_NODEV|MS_NOEXEC,
opts) < 0) {
^
../../src/util/vircgroupv1.c:814:58: error: use of undeclared identifier
'MS_NOEXEC'
if (mount("tmpfs", root, "tmpfs", MS_NOSUID|MS_NODEV|MS_NOEXEC,
opts) < 0) {
^
../../src/util/vircgroupv1.c:841:65: error: use of undeclared identifier
'MS_BIND'
if (mount(src, group->legacy[i].mountPoint, "none", MS_BIND,
^
Signed-off-by: Pavel Hrdina <phrdina(a)redhat.com>
---
src/util/vircgroupv1.c | 20 +++++++++++++++-----
1 file changed, 15 insertions(+), 5 deletions(-)
diff --git a/src/util/vircgroupv1.c b/src/util/vircgroupv1.c
index 62a6e5c448..28a74474ee 100644
--- a/src/util/vircgroupv1.c
+++ b/src/util/vircgroupv1.c
@@ -20,13 +20,11 @@
*/
#include <config.h>
-#if defined HAVE_MNTENT_H && defined HAVE_GETMNTENT_R
+#ifdef __linux__
# include <mntent.h>
-#endif
-#include <sys/stat.h>
-#if defined HAVE_SYS_MOUNT_H
+# include <sys/stat.h>
# include <sys/mount.h>
-#endif
+#endif /* __linux__ */
#include "internal.h"
@@ -55,6 +53,8 @@ VIR_ENUM_IMPL(virCgroupV1Controller, VIR_CGROUP_CONTROLLER_LAST,
"name=systemd");
+#ifdef __linux__
+
/* We're looking for at least one 'cgroup' fs mount,
* which is *not* a named mount. */
static bool
@@ -2099,3 +2099,13 @@ virCgroupV1Register(void)
{
virCgroupBackendRegister(&virCgroupV1Backend);
}
+
+#else /* !__linux__ */
+
+void
+virCgroupV1Register(void)
+{
+ VIR_INFO("Control groups not supported on this platform");
+}
+
+#endif /* !__linux__ */
--
2.17.1
6:04 a.m.
On Thu, Sep 27, 2018 at 12:31:08PM +0200, Pavel Hrdina wrote:
Chagnes in v3:
- removed VIR_CGROUP_SUPPORTED
- include system headers only on linux
Pavel Hrdina (3):
vircgroup: remove VIR_CGROUP_SUPPORTED
vircgroup: include system headers only on linux
vircgroupv1: fix build on non-linux OSes
src/util/vircgroup.c | 38 ++++++++++++++++----------------------
src/util/vircgroupv1.c | 20 +++++++++++++++-----
2 files changed, 31 insertions(+), 27 deletions(-)
Reviewed-by: Ján Tomko <jtomko(a)redhat.com>
Jano
2283
days inactive
2283
days old
4 comments
2 participants
participants (2)
-
Ján Tomko -
Pavel Hrdina