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-rw-r--r--cmd/podman/common/specgen.go51
-rw-r--r--cmd/podman/containers/diff.go6
-rw-r--r--cmd/podman/diff.go14
-rw-r--r--cmd/podman/images/diff.go12
-rw-r--r--pkg/rootless/rootless_linux.c45
-rw-r--r--pkg/rootless/rootless_linux.go113
6 files changed, 91 insertions, 150 deletions
diff --git a/cmd/podman/common/specgen.go b/cmd/podman/common/specgen.go
index 85b344b3c..b8526993c 100644
--- a/cmd/podman/common/specgen.go
+++ b/cmd/podman/common/specgen.go
@@ -47,6 +47,12 @@ func FillOutSpecGen(s *specgen.SpecGenerator, c *ContainerCLIOpts, args []string
if err != nil {
return err
}
+ if s.ResourceLimits == nil {
+ s.ResourceLimits = &specs.LinuxResources{}
+ }
+ if s.ResourceLimits.Memory == nil {
+ s.ResourceLimits.Memory = &specs.LinuxMemory{}
+ }
if m := c.Memory; len(m) > 0 {
ml, err := units.RAMInBytes(m)
if err != nil {
@@ -81,6 +87,9 @@ func FillOutSpecGen(s *specgen.SpecGenerator, c *ContainerCLIOpts, args []string
}
s.ResourceLimits.Memory.Kernel = &mk
}
+ if s.ResourceLimits.BlockIO == nil {
+ s.ResourceLimits.BlockIO = &specs.LinuxBlockIO{}
+ }
if b := c.BlkIOWeight; len(b) > 0 {
u, err := strconv.ParseUint(b, 10, 16)
if err != nil {
@@ -313,14 +322,16 @@ func FillOutSpecGen(s *specgen.SpecGenerator, c *ContainerCLIOpts, args []string
s.StopSignal = &stopSignal
}
}
- swappiness := uint64(c.MemorySwappiness)
if s.ResourceLimits == nil {
s.ResourceLimits = &specs.LinuxResources{}
}
if s.ResourceLimits.Memory == nil {
s.ResourceLimits.Memory = &specs.LinuxMemory{}
}
- s.ResourceLimits.Memory.Swappiness = &swappiness
+ if c.MemorySwappiness >= 0 {
+ swappiness := uint64(c.MemorySwappiness)
+ s.ResourceLimits.Memory.Swappiness = &swappiness
+ }
if s.LogConfiguration == nil {
s.LogConfiguration = &specgen.LogConfig{}
@@ -332,7 +343,9 @@ func FillOutSpecGen(s *specgen.SpecGenerator, c *ContainerCLIOpts, args []string
if s.ResourceLimits.Pids == nil {
s.ResourceLimits.Pids = &specs.LinuxPids{}
}
- s.ResourceLimits.Pids.Limit = c.PIDsLimit
+ if c.PIDsLimit > 0 {
+ s.ResourceLimits.Pids.Limit = c.PIDsLimit
+ }
if c.CGroups == "disabled" && c.PIDsLimit > 0 {
s.ResourceLimits.Pids.Limit = -1
}
@@ -507,18 +520,28 @@ func FillOutSpecGen(s *specgen.SpecGenerator, c *ContainerCLIOpts, args []string
if s.ResourceLimits.CPU == nil {
s.ResourceLimits.CPU = &specs.LinuxCPU{}
}
- s.ResourceLimits.CPU.Shares = &c.CPUShares
- s.ResourceLimits.CPU.Period = &c.CPUPeriod
-
- // TODO research these
- //s.ResourceLimits.CPU.Cpus = c.CPUS
- //s.ResourceLimits.CPU.Cpus = c.CPUSetCPUs
+ if c.CPUShares > 0 {
+ s.ResourceLimits.CPU.Shares = &c.CPUShares
+ }
+ if c.CPUPeriod > 0 {
+ s.ResourceLimits.CPU.Period = &c.CPUPeriod
+ }
- //s.ResourceLimits.CPU. = c.CPUSetCPUs
- s.ResourceLimits.CPU.Mems = c.CPUSetMems
- s.ResourceLimits.CPU.Quota = &c.CPUQuota
- s.ResourceLimits.CPU.RealtimePeriod = &c.CPURTPeriod
- s.ResourceLimits.CPU.RealtimeRuntime = &c.CPURTRuntime
+ if c.CPUSetCPUs != "" {
+ s.ResourceLimits.CPU.Cpus = c.CPUSetCPUs
+ }
+ if c.CPUSetMems != "" {
+ s.ResourceLimits.CPU.Mems = c.CPUSetMems
+ }
+ if c.CPUQuota > 0 {
+ s.ResourceLimits.CPU.Quota = &c.CPUQuota
+ }
+ if c.CPURTPeriod > 0 {
+ s.ResourceLimits.CPU.RealtimePeriod = &c.CPURTPeriod
+ }
+ if c.CPURTRuntime > 0 {
+ s.ResourceLimits.CPU.RealtimeRuntime = &c.CPURTRuntime
+ }
s.OOMScoreAdj = &c.OOMScoreAdj
s.RestartPolicy = c.Restart
s.Remove = c.Rm
diff --git a/cmd/podman/containers/diff.go b/cmd/podman/containers/diff.go
index ebc0d8ea1..046dac53e 100644
--- a/cmd/podman/containers/diff.go
+++ b/cmd/podman/containers/diff.go
@@ -45,7 +45,11 @@ func diff(cmd *cobra.Command, args []string) error {
return errors.New("container must be specified: podman container diff [options [...]] ID-NAME")
}
- results, err := registry.ContainerEngine().ContainerDiff(registry.GetContext(), args[0], entities.DiffOptions{})
+ var id string
+ if len(args) > 0 {
+ id = args[0]
+ }
+ results, err := registry.ContainerEngine().ContainerDiff(registry.GetContext(), id, *diffOpts)
if err != nil {
return err
}
diff --git a/cmd/podman/diff.go b/cmd/podman/diff.go
index 8db76e8af..ec94c0918 100644
--- a/cmd/podman/diff.go
+++ b/cmd/podman/diff.go
@@ -46,10 +46,9 @@ func init() {
}
func diff(cmd *cobra.Command, args []string) error {
- if found, err := registry.ImageEngine().Exists(registry.GetContext(), args[0]); err != nil {
- return err
- } else if found.Value {
- return images.Diff(cmd, args, diffOpts)
+ // Latest implies looking for a container
+ if diffOpts.Latest {
+ return containers.Diff(cmd, args, diffOpts)
}
if found, err := registry.ContainerEngine().ContainerExists(registry.GetContext(), args[0]); err != nil {
@@ -57,5 +56,12 @@ func diff(cmd *cobra.Command, args []string) error {
} else if found.Value {
return containers.Diff(cmd, args, diffOpts)
}
+
+ if found, err := registry.ImageEngine().Exists(registry.GetContext(), args[0]); err != nil {
+ return err
+ } else if found.Value {
+ return images.Diff(cmd, args, diffOpts)
+ }
+
return fmt.Errorf("%s not found on system", args[0])
}
diff --git a/cmd/podman/images/diff.go b/cmd/podman/images/diff.go
index dd98dc4d6..7cfacfc6c 100644
--- a/cmd/podman/images/diff.go
+++ b/cmd/podman/images/diff.go
@@ -11,8 +11,8 @@ import (
var (
// podman container _inspect_
diffCmd = &cobra.Command{
- Use: "diff [flags] CONTAINER",
- Args: registry.IdOrLatestArgs,
+ Use: "diff [flags] IMAGE",
+ Args: cobra.ExactArgs(1),
Short: "Inspect changes on image's file systems",
Long: `Displays changes on a image's filesystem. The image will be compared to its parent layer.`,
RunE: diff,
@@ -32,16 +32,16 @@ func init() {
diffOpts = &entities.DiffOptions{}
flags := diffCmd.Flags()
flags.BoolVar(&diffOpts.Archive, "archive", true, "Save the diff as a tar archive")
- _ = flags.MarkHidden("archive")
+ _ = flags.MarkDeprecated("archive", "Provided for backwards compatibility, has no impact on output.")
flags.StringVar(&diffOpts.Format, "format", "", "Change the output format")
}
func diff(cmd *cobra.Command, args []string) error {
- if len(args) == 0 && !diffOpts.Latest {
- return errors.New("image must be specified: podman image diff [options [...]] ID-NAME")
+ if diffOpts.Latest {
+ return errors.New("image diff does not support --latest")
}
- results, err := registry.ImageEngine().Diff(registry.GetContext(), args[0], entities.DiffOptions{})
+ results, err := registry.ImageEngine().Diff(registry.GetContext(), args[0], *diffOpts)
if err != nil {
return err
}
diff --git a/pkg/rootless/rootless_linux.c b/pkg/rootless/rootless_linux.c
index da52a7217..72d461cdc 100644
--- a/pkg/rootless/rootless_linux.c
+++ b/pkg/rootless/rootless_linux.c
@@ -535,8 +535,36 @@ create_pause_process (const char *pause_pid_file_path, char **argv)
}
}
+static void
+join_namespace_or_die (int pid_to_join, const char *ns_file)
+{
+ char ns_path[PATH_MAX];
+ int ret;
+ int fd;
+
+ ret = snprintf (ns_path, PATH_MAX, "/proc/%d/ns/%s", pid_to_join, ns_file);
+ if (ret == PATH_MAX)
+ {
+ fprintf (stderr, "internal error: namespace path too long\n");
+ _exit (EXIT_FAILURE);
+ }
+
+ fd = open (ns_path, O_CLOEXEC | O_RDONLY);
+ if (fd < 0)
+ {
+ fprintf (stderr, "cannot open: %s\n", ns_path);
+ _exit (EXIT_FAILURE);
+ }
+ if (setns (fd, 0) < 0)
+ {
+ fprintf (stderr, "cannot set namespace to %s: %s\n", ns_path, strerror (errno));
+ _exit (EXIT_FAILURE);
+ }
+ close (fd);
+}
+
int
-reexec_userns_join (int userns, int mountns, char *pause_pid_file_path)
+reexec_userns_join (int pid_to_join, char *pause_pid_file_path)
{
char uid[16];
char gid[16];
@@ -606,19 +634,8 @@ reexec_userns_join (int userns, int mountns, char *pause_pid_file_path)
_exit (EXIT_FAILURE);
}
- if (setns (userns, 0) < 0)
- {
- fprintf (stderr, "cannot setns: %s\n", strerror (errno));
- _exit (EXIT_FAILURE);
- }
- close (userns);
-
- if (mountns >= 0 && setns (mountns, 0) < 0)
- {
- fprintf (stderr, "cannot setns: %s\n", strerror (errno));
- _exit (EXIT_FAILURE);
- }
- close (mountns);
+ join_namespace_or_die (pid_to_join, "user");
+ join_namespace_or_die (pid_to_join, "mnt");
if (syscall_setresgid (0, 0, 0) < 0)
{
diff --git a/pkg/rootless/rootless_linux.go b/pkg/rootless/rootless_linux.go
index 5ddfab7ad..3de136f12 100644
--- a/pkg/rootless/rootless_linux.go
+++ b/pkg/rootless/rootless_linux.go
@@ -31,7 +31,7 @@ extern uid_t rootless_uid();
extern uid_t rootless_gid();
extern int reexec_in_user_namespace(int ready, char *pause_pid_file_path, char *file_to_read, int fd);
extern int reexec_in_user_namespace_wait(int pid, int options);
-extern int reexec_userns_join(int userns, int mountns, char *pause_pid_file_path);
+extern int reexec_userns_join(int pid, char *pause_pid_file_path);
*/
import "C"
@@ -124,91 +124,6 @@ func tryMappingTool(tool string, pid int, hostID int, mappings []idtools.IDMap)
return nil
}
-func readUserNs(path string) (string, error) {
- b := make([]byte, 256)
- _, err := unix.Readlink(path, b)
- if err != nil {
- return "", err
- }
- return string(b), nil
-}
-
-func readUserNsFd(fd uintptr) (string, error) {
- return readUserNs(fmt.Sprintf("/proc/self/fd/%d", fd))
-}
-
-func getParentUserNs(fd uintptr) (uintptr, error) {
- const nsGetParent = 0xb702
- ret, _, errno := unix.Syscall(unix.SYS_IOCTL, fd, uintptr(nsGetParent), 0)
- if errno != 0 {
- return 0, errno
- }
- return (uintptr)(unsafe.Pointer(ret)), nil
-}
-
-// getUserNSFirstChild returns an open FD for the first direct child user namespace that created the process
-// Each container creates a new user namespace where the runtime runs. The current process in the container
-// might have created new user namespaces that are child of the initial namespace we created.
-// This function finds the initial namespace created for the container that is a child of the current namespace.
-//
-// current ns
-// / \
-// TARGET -> a [other containers]
-// /
-// b
-// /
-// NS READ USING THE PID -> c
-func getUserNSFirstChild(fd uintptr) (*os.File, error) {
- currentNS, err := readUserNs("/proc/self/ns/user")
- if err != nil {
- return nil, err
- }
-
- ns, err := readUserNsFd(fd)
- if err != nil {
- return nil, errors.Wrapf(err, "cannot read user namespace")
- }
- if ns == currentNS {
- return nil, errors.New("process running in the same user namespace")
- }
-
- for {
- nextFd, err := getParentUserNs(fd)
- if err != nil {
- if err == unix.ENOTTY {
- return os.NewFile(fd, "userns child"), nil
- }
- return nil, errors.Wrapf(err, "cannot get parent user namespace")
- }
-
- ns, err = readUserNsFd(nextFd)
- if err != nil {
- return nil, errors.Wrapf(err, "cannot read user namespace")
- }
-
- if ns == currentNS {
- if err := unix.Close(int(nextFd)); err != nil {
- return nil, err
- }
-
- // Drop O_CLOEXEC for the fd.
- _, _, errno := unix.Syscall(unix.SYS_FCNTL, fd, unix.F_SETFD, 0)
- if errno != 0 {
- if err := unix.Close(int(fd)); err != nil {
- logrus.Errorf("failed to close file descriptor %d", fd)
- }
- return nil, errno
- }
-
- return os.NewFile(fd, "userns child"), nil
- }
- if err := unix.Close(int(fd)); err != nil {
- return nil, err
- }
- fd = nextFd
- }
-}
-
// joinUserAndMountNS re-exec podman in a new userNS and join the user and mount
// namespace of the specified PID without looking up its parent. Useful to join directly
// the conmon process.
@@ -220,31 +135,7 @@ func joinUserAndMountNS(pid uint, pausePid string) (bool, int, error) {
cPausePid := C.CString(pausePid)
defer C.free(unsafe.Pointer(cPausePid))
- userNS, err := os.Open(fmt.Sprintf("/proc/%d/ns/user", pid))
- if err != nil {
- return false, -1, err
- }
- defer func() {
- if err := userNS.Close(); err != nil {
- logrus.Errorf("unable to close namespace: %q", err)
- }
- }()
-
- mountNS, err := os.Open(fmt.Sprintf("/proc/%d/ns/mnt", pid))
- if err != nil {
- return false, -1, err
- }
- defer func() {
- if err := mountNS.Close(); err != nil {
- logrus.Errorf("unable to close namespace: %q", err)
- }
- }()
-
- fd, err := getUserNSFirstChild(userNS.Fd())
- if err != nil {
- return false, -1, err
- }
- pidC := C.reexec_userns_join(C.int(fd.Fd()), C.int(mountNS.Fd()), cPausePid)
+ pidC := C.reexec_userns_join(C.int(pid), cPausePid)
if int(pidC) < 0 {
return false, -1, errors.Errorf("cannot re-exec process")
}
generated by cgit v1.2.3-54-g00ecf (git 2.39.0) at 2024-12-28 15:30:18 +0000