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cgroup: error handling for critical operations

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Signed-off-by: Joachim Wiberg <troglobit@gmail.com>
This commit is contained in:
Joachim Wiberg
2021-03-19 09:29:27 +01:00
parent 6e24f2ff13
commit 5b8fe12502
1 changed files with 8 additions and 6 deletions
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src/cgroup.c
+8 -6
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@@ -47,12 +47,12 @@ static void group_init(char *path, int leaf, int weight)
}
/* enable detected controllers on domain groups */
if (!leaf)
fnwrite(controllers, "%s/cgroup.subtree_control", path);
if (!leaf && fnwrite(controllers, "%s/cgroup.subtree_control", path))
_pe("Failed %s for %s", controllers, path);
/* set initial group weight */
if (weight)
fnwrite(str("%d", weight), "%s/cgroup.subtree_control", path);
if (weight && fnwrite(str("%d", weight), "%s/cpu.weight", path))
_pe("Failed setting cpu.weight %d for %s", weight, path);
}
static int cgroup_leaf_init(char *group, char *name, int pid)
@@ -69,7 +69,8 @@ static int cgroup_leaf_init(char *group, char *name, int pid)
group_init(path, 1, 0);
/* move process to new group */
fnwrite(str("%d", pid), "%s/cgroup.procs", path);
if (fnwrite(str("%d", pid), "%s/cgroup.procs", path))
_pe("Failed moving pid %d to %s", pid, path);
strlcat(path, "/cgroup.events", sizeof(path));
@@ -202,7 +203,8 @@ void cgroup_init(uev_ctx_t *ctx)
fclose(fp);
/* Enable all controllers */
fnwrite(controllers, FINIT_CGPATH "/cgroup.subtree_control");
if (fnwrite(controllers, FINIT_CGPATH "/cgroup.subtree_control"))
_pe("Failed %s for %s", controllers, FINIT_CGPATH "/cgroup.subtree_control");
/* Default groups, PID 1, services, and user/login processes */
group_init(FINIT_CGPATH "/init", 1, 100);