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cgroups: cgfsng_get: handle unified hierarchy

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Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
This commit is contained in:
Christian Brauner 2018-01-31 16:41:53 +01:00
parent c2aed66d0f
commit 0069cc619e
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GPG Key ID: 8EB056D53EECB12D
1 changed files with 17 additions and 11 deletions
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28
src/lxc/cgroups/cgfsng.c
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@ -2352,28 +2352,34 @@ static bool cgfsng_attach(const char *name, const char *lxcpath, pid_t pid)
* Here we don't have a cgroup_data set up, so we ask the running * Here we don't have a cgroup_data set up, so we ask the running
* container through the commands API for the cgroup path * container through the commands API for the cgroup path
*/ */
static int cgfsng_get(const char *filename, char *value, size_t len, const char *name, const char *lxcpath) static int cgfsng_get(const char *filename, char *value, size_t len,
const char *name, const char *lxcpath)
{ {
char *subsystem, *p, *path;
struct hierarchy *h;
int ret = -1; int ret = -1;
size_t controller_len;
char *controller, *p, *path;
struct hierarchy *h;
subsystem = alloca(strlen(filename) + 1); controller_len = strlen(filename);
strcpy(subsystem, filename); controller = alloca(controller_len + 1);
if ((p = strchr(subsystem, '.')) != NULL) strcpy(controller, filename);
p = strchr(controller, '.');
if (p)
*p = '\0'; *p = '\0';
path = lxc_cmd_get_cgroup_path(name, lxcpath, subsystem); path = lxc_cmd_get_cgroup_path(name, lxcpath, controller);
if (!path) /* not running */ /* not running */
if (!path)
return -1; return -1;
h = get_hierarchy(subsystem); h = get_hierarchy(controller);
if (h) { if (h) {
char *fullpath = build_full_cgpath_from_monitorpath(h, path, filename); char *fullpath;
fullpath = build_full_cgpath_from_monitorpath(h, path, filename);
ret = lxc_read_from_file(fullpath, value, len); ret = lxc_read_from_file(fullpath, value, len);
free(fullpath); free(fullpath);
} }
free(path); free(path);
return ret; return ret;