unix: add dm-ioctl constants and types

This interface is used by devicemapper framework to manage its block
devices.

Change-Id: If86a679461867dac18b56bdf005567ffc4b7f951
Reviewed-on: https://go-review.googlesource.com/c/sys/+/247437
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

unix/linux/types.go

@@ -85,6 +85,7 @@ struct termios2 {
 #include <linux/cgroupstats.h>
 #include <linux/cryptouser.h>
 #include <linux/devlink.h>
+#include <linux/dm-ioctl.h>
 #include <linux/errqueue.h>
 #include <linux/fanotify.h>
 #include <linux/filter.h>
@@ -471,6 +472,25 @@ type FscryptRemoveKeyArg C.struct_fscrypt_remove_key_arg
 
 type FscryptGetKeyStatusArg C.struct_fscrypt_get_key_status_arg
 
+// Device Mapper
+
+type DmIoctl C.struct_dm_ioctl
+
+type DmTargetSpec C.struct_dm_target_spec
+
+type DmTargetDeps C.struct_dm_target_deps
+
+type DmNameList C.struct_dm_name_list
+
+type DmTargetVersions C.struct_dm_target_versions
+
+type DmTargetMsg C.struct_dm_target_msg
+
+const (
+	SizeofDmIoctl      = C.sizeof_struct_dm_ioctl
+	SizeofDmTargetSpec = C.sizeof_struct_dm_target_spec
+)
+
 // Structure for Keyctl
 
 type KeyctlDHParams C.struct_keyctl_dh_params

unix/mkerrors.sh

@@ -196,6 +196,7 @@ struct ltchars {
 #include <linux/capability.h>
 #include <linux/cryptouser.h>
 #include <linux/devlink.h>
+#include <linux/dm-ioctl.h>
 #include <linux/errqueue.h>
 #include <linux/falloc.h>
 #include <linux/fanotify.h>
@@ -517,6 +518,7 @@ ccflags="$@"
 		$2 ~ /^FS_IOC_.*(ENCRYPTION|VERITY|[GS]ETFLAGS)/ ||
 		$2 ~ /^FS_VERITY_/ ||
 		$2 ~ /^FSCRYPT_/ ||
+		$2 ~ /^DM_/ ||
 		$2 ~ /^GRND_/ ||
 		$2 ~ /^RND/ ||
 		$2 ~ /^KEY_(SPEC|REQKEY_DEFL)_/ ||

unix/mkpost.go

@@ -81,6 +81,15 @@ func main() {
 	convertStatvfsRegex := regexp.MustCompile(`((Fstype|Mnton|Mntfrom)name)(\s+)\[(\d+)\]int8`)
 	b = convertStatvfsRegex.ReplaceAll(b, []byte("$1$3[$4]byte"))
 
+	// Convert []int8 to []byte in device mapper ioctl interface
+	convertDmIoctlNames := regexp.MustCompile(`(Name|Uuid|Target_type|Data)(\s+)\[(\d+)\]u?int8`)
+	dmIoctlTypes := regexp.MustCompile(`type Dm(\S+) struct {[^}]*}`)
+	dmStructs := dmIoctlTypes.FindAll(b, -1)
+	for _, s := range dmStructs {
+		newNames := convertDmIoctlNames.ReplaceAll(s, []byte("$1$2[$3]byte"))
+		b = bytes.Replace(b, s, newNames, 1)
+	}
+
 	// Convert [1024]int8 to [1024]byte in Ptmget members
 	convertPtmget := regexp.MustCompile(`([SC]n)(\s+)\[(\d+)\]u?int8`)
 	b = convertPtmget.ReplaceAll(b, []byte("$1[$3]byte"))

unix/zerrors_linux.go

@@ -377,6 +377,51 @@ const (
 	DEVMEM_MAGIC                                = 0x454d444d
 	DEVPTS_SUPER_MAGIC                          = 0x1cd1
 	DMA_BUF_MAGIC                               = 0x444d4142
+	DM_ACTIVE_PRESENT_FLAG                      = 0x20
+	DM_BUFFER_FULL_FLAG                         = 0x100
+	DM_CONTROL_NODE                             = "control"
+	DM_DATA_OUT_FLAG                            = 0x10000
+	DM_DEFERRED_REMOVE                          = 0x20000
+	DM_DEV_ARM_POLL                             = 0xc138fd10
+	DM_DEV_CREATE                               = 0xc138fd03
+	DM_DEV_REMOVE                               = 0xc138fd04
+	DM_DEV_RENAME                               = 0xc138fd05
+	DM_DEV_SET_GEOMETRY                         = 0xc138fd0f
+	DM_DEV_STATUS                               = 0xc138fd07
+	DM_DEV_SUSPEND                              = 0xc138fd06
+	DM_DEV_WAIT                                 = 0xc138fd08
+	DM_DIR                                      = "mapper"
+	DM_GET_TARGET_VERSION                       = 0xc138fd11
+	DM_INACTIVE_PRESENT_FLAG                    = 0x40
+	DM_INTERNAL_SUSPEND_FLAG                    = 0x40000
+	DM_IOCTL                                    = 0xfd
+	DM_LIST_DEVICES                             = 0xc138fd02
+	DM_LIST_VERSIONS                            = 0xc138fd0d
+	DM_MAX_TYPE_NAME                            = 0x10
+	DM_NAME_LEN                                 = 0x80
+	DM_NOFLUSH_FLAG                             = 0x800
+	DM_PERSISTENT_DEV_FLAG                      = 0x8
+	DM_QUERY_INACTIVE_TABLE_FLAG                = 0x1000
+	DM_READONLY_FLAG                            = 0x1
+	DM_REMOVE_ALL                               = 0xc138fd01
+	DM_SECURE_DATA_FLAG                         = 0x8000
+	DM_SKIP_BDGET_FLAG                          = 0x200
+	DM_SKIP_LOCKFS_FLAG                         = 0x400
+	DM_STATUS_TABLE_FLAG                        = 0x10
+	DM_SUSPEND_FLAG                             = 0x2
+	DM_TABLE_CLEAR                              = 0xc138fd0a
+	DM_TABLE_DEPS                               = 0xc138fd0b
+	DM_TABLE_LOAD                               = 0xc138fd09
+	DM_TABLE_STATUS                             = 0xc138fd0c
+	DM_TARGET_MSG                               = 0xc138fd0e
+	DM_UEVENT_GENERATED_FLAG                    = 0x2000
+	DM_UUID_FLAG                                = 0x4000
+	DM_UUID_LEN                                 = 0x81
+	DM_VERSION                                  = 0xc138fd00
+	DM_VERSION_EXTRA                            = "-ioctl (2020-02-27)"
+	DM_VERSION_MAJOR                            = 0x4
+	DM_VERSION_MINOR                            = 0x2a
+	DM_VERSION_PATCHLEVEL                       = 0x0
 	DT_BLK                                      = 0x6
 	DT_CHR                                      = 0x2
 	DT_DIR                                      = 0x4

unix/ztypes_linux.go

@@ -140,6 +140,48 @@ type FscryptGetKeyStatusArg struct {
 	_            [13]uint32
 }
 
+type DmIoctl struct {
+	Version      [3]uint32
+	Data_size    uint32
+	Data_start   uint32
+	Target_count uint32
+	Open_count   int32
+	Flags        uint32
+	Event_nr     uint32
+	_            uint32
+	Dev          uint64
+	Name         [128]byte
+	Uuid         [129]byte
+	Data         [7]byte
+}
+
+type DmTargetSpec struct {
+	Sector_start uint64
+	Length       uint64
+	Status       int32
+	Next         uint32
+	Target_type  [16]byte
+}
+
+type DmTargetDeps struct {
+	Count uint32
+	_     uint32
+}
+
+type DmTargetVersions struct {
+	Next    uint32
+	Version [3]uint32
+}
+
+type DmTargetMsg struct {
+	Sector uint64
+}
+
+const (
+	SizeofDmIoctl      = 0x138
+	SizeofDmTargetSpec = 0x28
+)
+
 type KeyctlDHParams struct {
 	Private int32
 	Prime   int32

unix/ztypes_linux_386.go

@@ -117,6 +117,11 @@ type Flock_t struct {
 	Pid    int32
 }
 
+type DmNameList struct {
+	Dev  uint64
+	Next uint32
+}
+
 const (
 	FADV_DONTNEED = 0x4
 	FADV_NOREUSE  = 0x5

unix/ztypes_linux_amd64.go

@@ -117,6 +117,13 @@ type Flock_t struct {
 	_      [4]byte
 }
 
+type DmNameList struct {
+	Dev  uint64
+	Next uint32
+	Name [0]byte
+	_    [4]byte
+}
+
 const (
 	FADV_DONTNEED = 0x4
 	FADV_NOREUSE  = 0x5

unix/ztypes_linux_arm.go

@@ -121,6 +121,13 @@ type Flock_t struct {
 	_      [4]byte
 }
 
+type DmNameList struct {
+	Dev  uint64
+	Next uint32
+	Name [0]byte
+	_    [4]byte
+}
+
 const (
 	FADV_DONTNEED = 0x4
 	FADV_NOREUSE  = 0x5

unix/ztypes_linux_arm64.go

@@ -118,6 +118,13 @@ type Flock_t struct {
 	_      [4]byte
 }
 
+type DmNameList struct {
+	Dev  uint64
+	Next uint32
+	Name [0]byte
+	_    [4]byte
+}
+
 const (
 	FADV_DONTNEED = 0x4
 	FADV_NOREUSE  = 0x5

unix/ztypes_linux_mips.go

@@ -120,6 +120,13 @@ type Flock_t struct {
 	_      [4]byte
 }
 
+type DmNameList struct {
+	Dev  uint64
+	Next uint32
+	Name [0]byte
+	_    [4]byte
+}
+
 const (
 	FADV_DONTNEED = 0x4
 	FADV_NOREUSE  = 0x5

unix/ztypes_linux_mips64.go

@@ -118,6 +118,13 @@ type Flock_t struct {
 	_      [4]byte
 }
 
+type DmNameList struct {
+	Dev  uint64
+	Next uint32
+	Name [0]byte
+	_    [4]byte
+}
+
 const (
 	FADV_DONTNEED = 0x4
 	FADV_NOREUSE  = 0x5

unix/ztypes_linux_mips64le.go

@@ -118,6 +118,13 @@ type Flock_t struct {
 	_      [4]byte
 }
 
+type DmNameList struct {
+	Dev  uint64
+	Next uint32
+	Name [0]byte
+	_    [4]byte
+}
+
 const (
 	FADV_DONTNEED = 0x4
 	FADV_NOREUSE  = 0x5

unix/ztypes_linux_mipsle.go

@@ -120,6 +120,13 @@ type Flock_t struct {
 	_      [4]byte
 }
 
+type DmNameList struct {
+	Dev  uint64
+	Next uint32
+	Name [0]byte
+	_    [4]byte
+}
+
 const (
 	FADV_DONTNEED = 0x4
 	FADV_NOREUSE  = 0x5

unix/ztypes_linux_ppc64.go

@@ -119,6 +119,13 @@ type Flock_t struct {
 	_      [4]byte
 }
 
+type DmNameList struct {
+	Dev  uint64
+	Next uint32
+	Name [0]byte
+	_    [4]byte
+}
+
 const (
 	FADV_DONTNEED = 0x4
 	FADV_NOREUSE  = 0x5

unix/ztypes_linux_ppc64le.go

@@ -119,6 +119,13 @@ type Flock_t struct {
 	_      [4]byte
 }
 
+type DmNameList struct {
+	Dev  uint64
+	Next uint32
+	Name [0]byte
+	_    [4]byte
+}
+
 const (
 	FADV_DONTNEED = 0x4
 	FADV_NOREUSE  = 0x5

unix/ztypes_linux_riscv64.go

@@ -118,6 +118,13 @@ type Flock_t struct {
 	_      [4]byte
 }
 
+type DmNameList struct {
+	Dev  uint64
+	Next uint32
+	Name [0]byte
+	_    [4]byte
+}
+
 const (
 	FADV_DONTNEED = 0x4
 	FADV_NOREUSE  = 0x5

unix/ztypes_linux_s390x.go

@@ -117,6 +117,13 @@ type Flock_t struct {
 	_      [4]byte
 }
 
+type DmNameList struct {
+	Dev  uint64
+	Next uint32
+	Name [0]byte
+	_    [4]byte
+}
+
 const (
 	FADV_DONTNEED = 0x6
 	FADV_NOREUSE  = 0x7

unix/ztypes_linux_sparc64.go

@@ -121,6 +121,13 @@ type Flock_t struct {
 	_      [2]byte
 }
 
+type DmNameList struct {
+	Dev  uint64
+	Next uint32
+	Name [0]byte
+	_    [4]byte
+}
+
 const (
 	FADV_DONTNEED = 0x4
 	FADV_NOREUSE  = 0x5