476 lines
12 KiB
Go
476 lines
12 KiB
Go
package cmd
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import (
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"os"
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"fmt"
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//"log"
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"sync"
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"errors"
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"regexp"
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"os/exec"
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//"reflect"
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"strconv"
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"strings"
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log "github.com/sirupsen/logrus"
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)
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// TODO : Use SYS_RCTL_GET_RACCT syscall
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func removeRctlRules(jail string, rules []string) error {
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var cmd []string
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if len(rules) == 0 {
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rules[0] = ""
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}
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for _, r := range rules {
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if gUseSudo {
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cmd = append(cmd, "sudo")
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}
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cmd = append(cmd, "/usr/bin/rctl")
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cmd = append(cmd, "-r")
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cmd = append(cmd, fmt.Sprintf("jail:%s:%s", jail, r))
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// TODO : Log in another channel than stdout (will scramble display)
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//log.Println(fmt.Sprintf("Removing all rules for jail %s: %s", jail, cmd))
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//out, err := exec.Command(cmd[0], cmd[1:]...).Output()
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_, err := exec.Command(cmd[0], cmd[1:]...).Output()
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return err
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}
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return nil
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}
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// TODO: Validate with >1 dataset
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func umountAndUnjailZFS(jail *Jail) error {
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var ds []string
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// Make sure we have a string array
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ds = append(ds, jail.Config.Jail_zfs_dataset)
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for _, zd := range ds {
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// 1. Get dataset and childs
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cmd := fmt.Sprintf("zfs list -H -r -o name -S name %s", zd)
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out, err := executeCommand(cmd)
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if err != nil {
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fmt.Printf(fmt.Sprintf("ERROR listing dataset %s\n", zd))
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os.Exit(1)
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}
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for _, c := range strings.Split(out, "\n") {
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if len(c) == 0 {
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continue
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}
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fmt.Printf("Unmounting dataset %s: ", c)
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cmd := fmt.Sprintf("zfs umount %s", c)
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_, err := executeCommandInJail(jail, cmd)
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if err != nil {
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return err
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}
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fmt.Printf("OK\n")
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}
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}
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// 2. Unjail dataset from the host
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cmd := fmt.Sprintf("zfs unjail %s %s", jail.InternalName, ds[len(ds)-1])
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_, err := executeCommand(cmd)
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if err != nil {
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fmt.Printf("ERROR unjailing %s: %s\n", ds[len(ds)-1], err.Error())
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return err
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}
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return nil
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}
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func destroyVNetInterfaces(jail *Jail) error {
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if !strings.EqualFold(jail.Config.Ip4_addr, "none") {
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for _, i := range strings.Split(jail.Config.Ip4_addr, ",") {
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iname := fmt.Sprintf("%s.%d", strings.Split(i, "|")[0], jail.JID)
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fmt.Printf("%s: ", iname)
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_, err := executeCommand(fmt.Sprintf("ifconfig %s destroy", iname))
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//_, err := executeScript(fmt.Sprintf("ifconfig %s destroy >/dev/null 2>&1", iname))
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if err != nil {
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return err
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} else {
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fmt.Printf("OK\n")
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}
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}
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}
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if !strings.EqualFold(jail.Config.Ip6_addr, "none") {
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for _, i := range strings.Split(jail.Config.Ip6_addr, ",") {
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iname := fmt.Sprintf("%s.%d", strings.Split(i, "|")[0], jail.JID)
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fmt.Printf("%s: ", iname)
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_, err := executeCommand(fmt.Sprintf("ifconfig %s destroy", iname))
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//_, err := executeScript(fmt.Sprintf("ifconfig %s destroy >/dev/null 2>&1", iname))
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if err != nil {
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return err
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} else {
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fmt.Printf("OK\n")
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}
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}
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}
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return nil
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}
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// Jails copy the ruleset referenced as "devfs_ruleset" when starting, getting a new devsf_ruleset ID.
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// This new ID can be obtained with 'jls -j $JID devfs_ruleset'
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// This is the ID which needs to be removed. Original ID referenced is json should not be deleted
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// or else it will require a restart of "devfs" service.
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// But, stoppign the jail already removes this >1000 ID.
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// So no need to call this function.
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func deleteDevfsRuleset(ruleset int) error {
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cmd := "devfs rule showsets"
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out, err := executeCommand(cmd)
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if err != nil {
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return errors.New(fmt.Sprintf("ERROR listing rulesets: %s", err.Error()))
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}
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rs := strconv.Itoa(ruleset)
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for _, r := range strings.Split(out, "\n") {
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if r == rs {
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cmd := fmt.Sprintf("devfs rule -s %d delset", ruleset)
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_, err := executeCommand(cmd)
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return err
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}
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}
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return nil
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}
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func umountFsFromHost(mountpoint string) error {
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cmd := "mount -p"
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out, err := executeCommand(cmd)
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if err != nil {
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return errors.New(fmt.Sprintf("Error executing mount: %s", err.Error()))
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}
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remSpPtrn := regexp.MustCompile(`\s+`)
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for _, l := range strings.Split(out, "\n") {
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f := strings.Split(remSpPtrn.ReplaceAllString(l, " "), " ")
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if len(f) > 2 {
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if strings.EqualFold(f[1], mountpoint) {
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cmd = fmt.Sprintf("umount %s", mountpoint)
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_, err := executeCommand(cmd)
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if err != nil {
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return errors.New(fmt.Sprintf("Error umounting %s: %s", mountpoint, err.Error()))
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}
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return nil
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}
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}
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}
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return nil
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}
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func umountJailFsFromHost(jail *Jail, mountpoint string) error {
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return umountFsFromHost(fmt.Sprintf("%s%s", jail.RootPath, mountpoint))
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}
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// Internal usage only
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func stopJail(jail *Jail) error {
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cmd := "jail -q"
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// Test if conf file exist (iocage created)
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cf := fmt.Sprintf("/var/run/jail.%s.conf", jail.InternalName)
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file, err := os.Open(cf)
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if err != nil {
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file.Close()
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cmd = fmt.Sprintf("%s -f %s", cmd, cf)
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}
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cmd = fmt.Sprintf("%s -r %s", cmd, jail.InternalName)
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_, err = executeCommand(cmd)
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if err != nil {
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return err
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}
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return nil
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}
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// Stop all running jails by reverse priority
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// Parallelize up to gMaxThreads
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// Only parallelize same priority level jails
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func StopAllRunningJails() {
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var stopList []Jail
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var wg *sync.WaitGroup
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var curThNb int
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var curPri int
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// Get boot enabled jails
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for _, j := range gJails {
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if j.Running == true {
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stopList = append(stopList, j)
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}
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}
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// Order by priority
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js := initJailSortStruct()
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fct, _, err := getStructFieldValue(js, "Config.PriorityDec")
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if err != nil {
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log.Errorf("ERROR getting JailSort struct field \"Config.PriorityDec\"\n")
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return
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}
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JailsOrderedBy(fct.Interface().(jailLessFunc)).Sort(stopList)
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wg = new(sync.WaitGroup)
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curThNb = 0
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for i, j := range stopList {
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jFullName := fmt.Sprintf("%s/%s", j.Datastore, j.Name)
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log.Debugf("Stopping %s with priority %s\n", jFullName, j.Config.Priority)
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jailPri, err := strconv.Atoi(j.Config.Priority)
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if err != nil {
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panic(fmt.Sprintf("Invalid format for Priority (Jail %s)\n", jFullName))
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}
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if (curThNb >= gMaxThreads || i == 0) {
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// FIXME : Use a pool instead of waiting for all threads to run a new one
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wg.Wait()
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curThNb = 0
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wg.Add(1)
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curThNb++
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curPri = jailPri
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go func(jailFullName string) {
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defer wg.Done()
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StopJail([]string{jailFullName})
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}(jFullName)
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} else {
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if (curPri == jailPri) {
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wg.Add(1)
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curThNb++
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go func(jailFullName string) {
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defer wg.Done()
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StopJail([]string{jailFullName})
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}(jFullName)
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} else {
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wg.Wait()
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curThNb = 0
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wg.Add(1)
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curThNb++
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curPri = jailPri
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go func(jailFullName string) {
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defer wg.Done()
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StopJail([]string{jailFullName})
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}(jFullName)
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}
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}
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}
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wg.Wait()
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}
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/*
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Stop jail:
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Remove rctl rules
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Execute prestop if set (jailhost perimeter)
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Execute stop if set (inside jail)
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Umount ZFS dataset from inside jail
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Unjail ZFS dataset from jailhost
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If VNet
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Delete VNet interface on host
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Delete devfs ruleset
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Effectively stop jail process
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Umount all mountpoints from $jail/fstab
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Umount proc if set
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Umount linprocfs if set
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Umount fdescfs if set
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Umount devfs if set
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Use setfib for each command
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Shouldnt rctl rules be removed last, when jail is stopped?
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*/
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func StopJail(args []string) {
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// Current jail were stopping
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var cj *Jail
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var err error
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for _, a := range args {
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// Check if jail exist and is distinctly named
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cj, err = getJailFromArray(a, []string{"basejail", "jail"}, gJails)
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if err != nil {
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fmt.Printf("Error getting jail: %s\n", err)
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continue
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}
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if cj.Running == false {
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fmt.Printf("Jail %s is not running!\n", cj.Name)
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continue
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}
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fmt.Printf("> Stopping jail %s\n", cj.Name)
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// Get and write new release into config.json
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updateVersion(cj)
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out, err := executeCommand(fmt.Sprintf("rctl jail:%s", cj.InternalName))
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if err == nil && len(out) > 0 {
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fmt.Printf(" > Remove RCTL rules:\n")
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err := removeRctlRules(cj.InternalName, []string{""})
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if err != nil {
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fmt.Printf("ERROR: %s\n", err.Error())
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} else {
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fmt.Printf(" > Remove RCTL rules: OK\n")
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}
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}
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if len(cj.Config.Exec_prestop) > 0 {
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fmt.Printf(" > Execute pre-stop:\n")
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_, err := executeCommand(cj.Config.Exec_prestop)
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if err != nil {
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fmt.Printf("ERROR: %s\n", err.Error())
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} else {
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fmt.Printf(" > Execute pre-stop: OK\n")
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}
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}
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if len(cj.Config.Exec_stop) > 0 {
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fmt.Printf(" > Execute stop:\n")
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_, err := executeCommandInJail(cj, cj.Config.Exec_stop)
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if err != nil {
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fmt.Printf("ERROR: %s\n", err.Error())
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} else {
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fmt.Printf(" > Execute stop: OK\n")
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}
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}
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if cj.Config.Jail_zfs > 0 {
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fmt.Printf(" > Umount jailed ZFS:\n")
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err := umountAndUnjailZFS(cj)
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if err != nil {
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fmt.Printf("ERROR: %s\n", err.Error())
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} else {
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fmt.Printf(" > Umount jailed ZFS: OK\n")
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}
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}
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if cj.Config.Vnet > 0 && len(cj.Config.Ip4_addr) > 0 {
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fmt.Printf(" > Destroy VNet interfaces:\n")
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err := destroyVNetInterfaces(cj)
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if err != nil {
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fmt.Printf("ERROR: %s\n", err.Error())
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} else {
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fmt.Printf(" > Destroy VNet interfaces: OK\n")
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}
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}
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fmt.Printf(" > Remove devfs ruleset %d: \n", cj.Devfs_ruleset)
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err = deleteDevfsRuleset(cj.Devfs_ruleset)
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if err != nil {
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fmt.Printf("ERROR: %s\n", err.Error())
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} else {
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fmt.Printf(" > Remove devfsruleset %d: OK\n", cj.Devfs_ruleset)
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}
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fmt.Printf(" > Stop jail %s:\n", cj.Name)
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err = stopJail(cj)
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if err != nil {
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fmt.Printf("ERROR: %s\n", err.Error())
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} else {
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fmt.Printf(" > Stop jail %s: OK\n", cj.Name)
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}
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if cj.Config.Mount_procfs > 0 {
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fmt.Printf(" > Umount procfs:\n")
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err := umountJailFsFromHost(cj, "/proc")
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if err != nil {
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fmt.Printf("ERROR: %s\n", err.Error())
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} else {
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fmt.Printf(" > Umount procfs: OK\n")
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}
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}
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if cj.Config.Mount_linprocfs > 0 {
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fmt.Printf(" > Umount linprocfs:\n")
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err := umountJailFsFromHost(cj, "/compat/linux/proc")
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if err != nil {
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fmt.Printf("ERROR: %s\n", err.Error())
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} else {
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fmt.Printf(" > Umount linprocfs: OK\n")
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}
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}
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// FIXME: /dev/fd is mounted even with Mount_fdescfs = 0 ?!
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//if cj.Config.Mount_fdescfs > 0 {
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fmt.Printf(" > Umount fdescfs:\n")
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err = umountJailFsFromHost(cj, "/dev/fd")
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if err != nil {
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fmt.Printf("ERROR: %s\n", err.Error())
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} else {
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fmt.Printf(" > Umount fdescfs: OK\n")
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}
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//}
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if cj.Config.Mount_devfs > 0 {
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fmt.Printf(" > Umount devfs:\n")
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err := umountJailFsFromHost(cj, "/dev")
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if err != nil {
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fmt.Printf("ERROR: %s\n", err.Error())
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} else {
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fmt.Printf(" > Umount devfs: OK\n")
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}
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}
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// Remove local mounts from $JAIL/fstab
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fstab := strings.Replace(cj.ConfigPath, "config.json", "fstab", 1)
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mounts, err := getFstab(fstab)
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if err != nil {
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fmt.Printf("ERROR: %s\n", err.Error())
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}
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if len(mounts) > 0 {
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fmt.Printf(" > Umount mountpoints from %s\n", fstab)
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errs := 0
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for _, m := range mounts {
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log.Debugf("Umounting %s\n", m.Mountpoint)
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err = umountFsFromHost(m.Mountpoint)
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if err != nil {
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fmt.Printf("ERROR: %s\n", err.Error())
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errs += 1
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}
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}
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if errs == 0 {
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fmt.Printf(" > Umount mountpoints from %s: OK\n", fstab)
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}
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}
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// TODO: Execute poststop
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if len(cj.Config.Exec_poststop) > 0 {
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fmt.Printf(" > Execute post-stop:\n")
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_, err := executeCommand(cj.Config.Exec_poststop)
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if err != nil {
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fmt.Printf("ERROR: %s\n", err.Error())
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} else {
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fmt.Printf(" > Execute post-stop: OK\n")
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}
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}
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// Remove parameter file
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pfile := fmt.Sprintf("/var/run/jail.%s.conf", cj.InternalName)
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if err = os.Remove(pfile); err != nil {
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fmt.Printf("Error deleting parameter file %s\n", pfile)
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}
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// We need this to get a reference to cj.Running (bc cj.Running is just a copy of value in the scope of StopJail())
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for i, j := range gJails {
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if strings.EqualFold(j.Name, cj.Name) && strings.EqualFold(j.Datastore, cj.Datastore) {
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if err = setStructFieldValue(&gJails[i], "Running", "false"); err != nil {
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fmt.Printf("ERROR: setting Running property to false: %s\n", err.Error())
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}
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if err = setStructFieldValue(&gJails[i], "JID", "0"); err != nil {
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fmt.Printf("ERROR: setting JID property to 0: %s\n", err.Error())
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}
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if err = setStructFieldValue(&gJails[i], "InternalName", ""); err != nil {
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fmt.Printf("ERROR: clearing InternalName property: %s\n", err.Error())
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}
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if err = setStructFieldValue(&gJails[i], "Devfs_ruleset", "0"); err != nil {
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fmt.Printf("ERROR: setting Devfs_ruleset property to 0: %s\n", err.Error())
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}
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}
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}
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writeConfigToDisk(cj, false)
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}
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}
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