Implement and test the following flags for podman run and create

memory, memory-reservation, memory-swap, memory-swappiness, kernel-memory,
cpu-period, cou-quota, cpu-shares, cpus, cpuset-cpus, cpuset-mems,
blkio-weight, blkio-weight-device, sysctl, and ulimit

Signed-off-by: umohnani8 <umohnani@redhat.com>

Closes: #221
Approved by: mheon

1 files changed, 37 insertions, 6 deletions

diff --git a/cmd/podman/create_cli.go b/cmd/podman/create_cli.go
index 0cc265e92..24856feb8 100644
--- a/cmd/podman/create_cli.go
+++ b/cmd/podman/create_cli.go
@@ -24,14 +24,45 @@ func getAllLabels(labelFile, inputLabels []string) (map[string]string, error) {
 	return labels, nil
 }
 
-func convertStringSliceToMap(strSlice []string, delimiter string) (map[string]string, error) {
+// validateSysctl validates a sysctl and returns it.
+func validateSysctl(strSlice []string) (map[string]string, error) {
 	sysctl := make(map[string]string)
-	for _, inputSysctl := range strSlice {
-		values := strings.Split(inputSysctl, delimiter)
-		if len(values) < 2 {
-			return sysctl, errors.Errorf("%s in an invalid sysctl value", inputSysctl)
+	validSysctlMap := map[string]bool{
+		"kernel.msgmax":          true,
+		"kernel.msgmnb":          true,
+		"kernel.msgmni":          true,
+		"kernel.sem":             true,
+		"kernel.shmall":          true,
+		"kernel.shmmax":          true,
+		"kernel.shmmni":          true,
+		"kernel.shm_rmid_forced": true,
+	}
+	validSysctlPrefixes := []string{
+		"net.",
+		"fs.mqueue.",
+	}
+
+	for _, val := range strSlice {
+		foundMatch := false
+		arr := strings.Split(val, "=")
+		if len(arr) < 2 {
+			return nil, errors.Errorf("%s is invalid, sysctl values must be in the form of KEY=VALUE", val)
+		}
+		if validSysctlMap[arr[0]] {
+			sysctl[arr[0]] = arr[1]
+			continue
+		}
+
+		for _, prefix := range validSysctlPrefixes {
+			if strings.HasPrefix(arr[0], prefix) {
+				sysctl[arr[0]] = arr[1]
+				foundMatch = true
+				break
+			}
+		}
+		if !foundMatch {
+			return nil, errors.Errorf("sysctl '%s' is not whitelisted", arr[0])
 		}
-		sysctl[values[0]] = values[1]
 	}
 	return sysctl, nil
 }