[CRIU] [PATCH 3/3] util: Add make_yard helper
Pavel Emelyanov
xemul at parallels.com
Tue Sep 22 04:50:20 PDT 2015
Signed-off-by: Pavel Emelyanov <xemul at parallels.com>
---
cgroup.c | 9 +--------
include/util.h | 2 ++
mount.c | 6 +-----
util.c | 17 ++++++++++++++++-
4 files changed, 20 insertions(+), 14 deletions(-)
diff --git a/cgroup.c b/cgroup.c
index 7bdccf8..e1288c7 100644
--- a/cgroup.c
+++ b/cgroup.c
@@ -1154,15 +1154,8 @@ static int prepare_cgroup_sfd(CgroupEntry *ce)
return -1;
}
- if (mount("none", cg_yard, "tmpfs", 0, NULL)) {
- pr_perror("Can't mount tmpfs in cgyard");
+ if (make_yard(cg_yard))
goto err;
- }
-
- if (mount("none", cg_yard, NULL, MS_PRIVATE, NULL)) {
- pr_perror("Can't make cgyard private");
- goto err;
- }
pr_debug("Opening %s as cg yard\n", cg_yard);
i = open(cg_yard, O_DIRECTORY);
diff --git a/include/util.h b/include/util.h
index f2300a9..21a21b8 100644
--- a/include/util.h
+++ b/include/util.h
@@ -261,4 +261,6 @@ void split(char *str, char token, char ***out, int *n);
int fd_has_data(int lfd);
+int make_yard(char *path);
+
#endif /* __CR_UTIL_H__ */
diff --git a/mount.c b/mount.c
index 34d11e8..7226616 100644
--- a/mount.c
+++ b/mount.c
@@ -2652,11 +2652,7 @@ static int populate_roots_yard(void)
if (mnt_roots == NULL)
return 0;
- if (mount("none", mnt_roots, "tmpfs", 0, NULL)) {
- pr_perror("Unable to mount tmpfs in %s", mnt_roots);
- return -1;
- }
- if (mount("none", mnt_roots, NULL, MS_PRIVATE, NULL))
+ if (make_yard(mnt_roots))
return -1;
for (nsid = ns_ids; nsid != NULL; nsid = nsid->next) {
diff --git a/util.c b/util.c
index b916eca..75758b7 100644
--- a/util.c
+++ b/util.c
@@ -14,7 +14,7 @@
#include <sys/sendfile.h>
#include <fcntl.h>
#include <poll.h>
-
+#include <sys/mount.h>
#include <sys/param.h>
#include <sys/types.h>
#include <sys/ptrace.h>
@@ -845,3 +845,18 @@ int fd_has_data(int lfd)
return ret;
}
+
+int make_yard(char *path)
+{
+ if (mount("none", path, "tmpfs", 0, NULL)) {
+ pr_perror("Unable to mount tmpfs in %s", path);
+ return -1;
+ }
+
+ if (mount("none", path, NULL, MS_PRIVATE, NULL)) {
+ pr_perror("Unable to mark yard as private");
+ return -1;
+ }
+
+ return 0;
+}
--
1.9.3
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