rebase: update go-ceph to v0.5.0

as go-ceph is 0.5.0 is released updating
the dependency to latest release.
more info about release at
https://github.com/ceph/go-ceph/releases/tag/v0.5.0

Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>

vendor/github.com/ceph/go-ceph/rbd/callback_shims.go

@@ -1,13 +0,0 @@
-package rbd
-
-/*
-
-#include <rbd/librbd.h>
-
-extern int diffIterateCallback(uint64_t ofs, size_t len, int exists, int index);
-
-int callDiffIterateCallback(uint64_t ofs, size_t len, int exists, int index) {
-	return diffIterateCallback(ofs, len, exists, index);
-}
-*/
-import "C"

vendor/github.com/ceph/go-ceph/rbd/diff_iterate.go

@@ -7,7 +7,7 @@ package rbd
 #include <stdlib.h>
 #include <rbd/librbd.h>
 
-extern int callDiffIterateCallback(uint64_t ofs, size_t len, int exists, int index);
+extern int diffIterateCallback(uint64_t, size_t, int, void *);
 
 // cgo is having trouble converting the callback from the librbd header
 // to a unsafe.Pointer. This shim exists solely to help it along.
@@ -16,9 +16,8 @@ static inline int wrap_rbd_diff_iterate2(
 			const char *fromsnapname,
 			uint64_t ofs, uint64_t len,
 			uint8_t include_parent, uint8_t whole_object,
-			void *cb,
-			uintptr_t arg) {
-	return rbd_diff_iterate2(image, fromsnapname, ofs, len, include_parent, whole_object, cb, (void*)arg);
+			uintptr_t index) {
+	return rbd_diff_iterate2(image, fromsnapname, ofs, len, include_parent, whole_object, diffIterateCallback, (void*)index);
 }
 */
 import "C"
@@ -99,7 +98,7 @@ func (image *Image) DiffIterate(config DiffIterateConfig) error {
 		return err
 	}
 	if config.Callback == nil {
-		return RBDError(C.EINVAL)
+		return rbdError(C.EINVAL)
 	}
 
 	var cSnapName *C.char
@@ -118,7 +117,6 @@ func (image *Image) DiffIterate(config DiffIterateConfig) error {
 		C.uint64_t(config.Length),
 		C.uint8_t(config.IncludeParent),
 		C.uint8_t(config.WholeObject),
-		C.callDiffIterateCallback,
 		C.uintptr_t(cbIndex))
 
 	return getError(ret)
@@ -126,9 +124,9 @@ func (image *Image) DiffIterate(config DiffIterateConfig) error {
 
 //export diffIterateCallback
 func diffIterateCallback(
-	offset C.uint64_t, length C.size_t, exists, index C.int) C.int {
+	offset C.uint64_t, length C.size_t, exists C.int, index unsafe.Pointer) C.int {
 
-	v := diffIterateCallbacks.Lookup(int(index))
+	v := diffIterateCallbacks.Lookup(int(uintptr(index)))
 	config := v.(DiffIterateConfig)
 	return C.int(config.Callback(
 		uint64(offset), uint64(length), int(exists), config.Data))

vendor/github.com/ceph/go-ceph/rbd/errors.go

@@ -7,24 +7,19 @@ import "C"
 
 import (
 	"errors"
-	"fmt"
 
 	"github.com/ceph/go-ceph/internal/errutil"
 )
 
-// revive:disable:exported Temporarily live with stuttering
+// rbdError represents an error condition returned from the librbd APIs.
+type rbdError int
 
-// RBDError represents an error condition returned from the librbd APIs.
-type RBDError int
+func (e rbdError) Error() string {
+	return errutil.FormatErrorCode("rbd", int(e))
+}
 
-// revive:enable:exported
-
-func (e RBDError) Error() string {
-	errno, s := errutil.FormatErrno(int(e))
-	if s == "" {
-		return fmt.Sprintf("rbd: ret=%d", errno)
-	}
-	return fmt.Sprintf("rbd: ret=%d, %s", errno, s)
+func (e rbdError) ErrorCode() int {
+	return int(e)
 }
 
 func getError(err C.int) error {
@@ -32,7 +27,7 @@ func getError(err C.int) error {
 		if err == -C.ENOENT {
 			return ErrNotFound
 		}
-		return RBDError(err)
+		return rbdError(err)
 	}
 	return nil
 }
@@ -79,5 +74,5 @@ var (
 // Private errors:
 
 const (
-	errRange = RBDError(-C.ERANGE)
+	errRange = rbdError(-C.ERANGE)
 )

vendor/github.com/ceph/go-ceph/rbd/features.go

@@ -152,7 +152,7 @@ func (image *Image) GetFeatures() (features uint64, err error) {
 	}
 
 	if ret := C.rbd_get_features(image.image, (*C.uint64_t)(&features)); ret < 0 {
-		return 0, RBDError(ret)
+		return 0, rbdError(ret)
 	}
 
 	return features, nil

vendor/github.com/ceph/go-ceph/rbd/namespace_nautilus.go

@@ -13,9 +13,9 @@ package rbd
 import "C"
 
 import (
-	"bytes"
 	"unsafe"
 
+	"github.com/ceph/go-ceph/internal/cutil"
 	"github.com/ceph/go-ceph/internal/retry"
 	"github.com/ceph/go-ceph/rados"
 )
@@ -100,12 +100,7 @@ func NamespaceList(ioctx *rados.IOContext) (names []string, err error) {
 	if err != nil {
 		return nil, err
 	}
-	tmpList := bytes.Split(buf[:cSize-1], []byte{0})
-	for _, s := range tmpList {
-		if len(s) > 0 {
-			name := C.GoString((*C.char)(unsafe.Pointer(&s[0])))
-			names = append(names, name)
-		}
-	}
+
+	names = cutil.SplitSparseBuffer(buf[:cSize])
 	return names, nil
 }

vendor/github.com/ceph/go-ceph/rbd/options_mimic.go

@@ -9,4 +9,8 @@ const (
 	// ImageOptionFlatten is the representation of RBD_IMAGE_OPTION_FLATTEN
 	// from librbd
 	ImageOptionFlatten = C.RBD_IMAGE_OPTION_FLATTEN
+
+	// ImageOptionCloneFormat is the representation of
+	// RBD_IMAGE_OPTION_CLONE_FORMAT from librbd
+	ImageOptionCloneFormat = C.RBD_IMAGE_OPTION_CLONE_FORMAT
 )

vendor/github.com/ceph/go-ceph/rbd/options_nautilus.go

@@ -1,12 +0,0 @@
-// +build !luminous,!mimic
-
-package rbd
-
-// #include <rbd/librbd.h>
-import "C"
-
-const (
-	// ImageOptionCloneFormat is the representation of
-	// RBD_IMAGE_OPTION_CLONE_FORMAT from librbd
-	ImageOptionCloneFormat = C.RBD_IMAGE_OPTION_CLONE_FORMAT
-)

vendor/github.com/ceph/go-ceph/rbd/pool_nautilus.go

@@ -84,3 +84,134 @@ func RemovePoolMetadata(ioctx *rados.IOContext, key string) error {
 	ret := C.rbd_pool_metadata_remove(cephIoctx(ioctx), cKey)
 	return getError(ret)
 }
+
+// PoolInit initializes a pool for use by rbd.
+// This function does not create new pools, rather it prepares the pool
+// to host rbd images.
+//
+// Implements:
+//  int rbd_pool_init(rados_ioctx_t io, bool force)
+func PoolInit(ioctx *rados.IOContext, force bool) error {
+	if ioctx == nil {
+		return ErrNoIOContext
+	}
+
+	ret := C.rbd_pool_init(cephIoctx(ioctx), C.bool(force))
+	return getError(ret)
+}
+
+// poolStats represents RBD pool stats variable.
+type poolStats struct {
+	stats C.rbd_pool_stats_t
+}
+
+// poolStatsCreate creates a new poolStats struct.
+//
+// Implements:
+//  void rbd_pool_stats_create(rbd_pool_stats_t *stats)
+func poolStatsCreate() *poolStats {
+	poolstats := &poolStats{}
+	C.rbd_pool_stats_create(&poolstats.stats)
+	return poolstats
+}
+
+// destroy a poolStats struct and free the associated resources.
+//
+// Implements:
+//  void rbd_pool_stats_destroy(rbd_pool_stats_t stats)
+func (poolstats *poolStats) destroy() {
+	C.rbd_pool_stats_destroy(poolstats.stats)
+
+	if poolstats.stats != nil {
+		poolstats.stats = nil
+	}
+}
+
+// PoolStatOption represents a group of configurable pool stat options.
+type PoolStatOption C.rbd_pool_stat_option_t
+
+const (
+	// PoolStatOptionImages is the representation of
+	// RBD_POOL_STAT_OPTION_IMAGES from librbd.
+	PoolStatOptionImages = PoolStatOption(C.RBD_POOL_STAT_OPTION_IMAGES)
+	// PoolStatOptionImageProvisionedBytes is the representation of
+	// RBD_POOL_STAT_OPTION_IMAGE_PROVISIONED_BYTES from librbd.
+	PoolStatOptionImageProvisionedBytes = PoolStatOption(C.RBD_POOL_STAT_OPTION_IMAGE_PROVISIONED_BYTES)
+	// PoolStatOptionImageMaxProvisionedBytes is the representation of
+	// RBD_POOL_STAT_OPTION_IMAGE_MAX_PROVISIONED_BYTES from librbd.
+	PoolStatOptionImageMaxProvisionedBytes = PoolStatOption(C.RBD_POOL_STAT_OPTION_IMAGE_MAX_PROVISIONED_BYTES)
+	// PoolStatOptionImageSnapshots is the representation of
+	// RBD_POOL_STAT_OPTION_IMAGE_SNAPSHOTS from librbd.
+	PoolStatOptionImageSnapshots = PoolStatOption(C.RBD_POOL_STAT_OPTION_IMAGE_SNAPSHOTS)
+	// PoolStatOptionTrashImages is the representation of
+	// RBD_POOL_STAT_OPTION_TRASH_IMAGES from librbd.
+	PoolStatOptionTrashImages = PoolStatOption(C.RBD_POOL_STAT_OPTION_TRASH_IMAGES)
+	// PoolStatOptionTrashProvisionedBytes is the representation of
+	// RBD_POOL_STAT_OPTION_TRASH_PROVISIONED_BYTES from librbd.
+	PoolStatOptionTrashProvisionedBytes = PoolStatOption(C.RBD_POOL_STAT_OPTION_TRASH_PROVISIONED_BYTES)
+	// PoolStatOptionTrashMaxProvisionedBytes is the representation of
+	// RBD_POOL_STAT_OPTION_TRASH_MAX_PROVISIONED_BYTES from librbd.
+	PoolStatOptionTrashMaxProvisionedBytes = PoolStatOption(C.RBD_POOL_STAT_OPTION_TRASH_MAX_PROVISIONED_BYTES)
+	// PoolStatOptionTrashSnapshots is the representation of
+	// RBD_POOL_STAT_OPTION_TRASH_SNAPSHOTS from librbd.
+	PoolStatOptionTrashSnapshots = PoolStatOption(C.RBD_POOL_STAT_OPTION_TRASH_SNAPSHOTS)
+)
+
+// addPoolStatOption adds the given PoolStatOption to PoolStats.
+//
+// Implements:
+//  int rbd_pool_stats_option_add_uint64(rbd_pool_stats_t stats, int stat_option, uint64_t* stat_val)
+func (poolstats *poolStats) addPoolStatOption(option PoolStatOption, val *uint64) error {
+	ret := C.rbd_pool_stats_option_add_uint64(
+		poolstats.stats,
+		C.int(option),
+		(*C.uint64_t)(val))
+	return getError(ret)
+}
+
+// GetAllPoolStats returns a map of all PoolStatOption(s) to their respective values.
+//
+// Implements:
+//  int rbd_pool_stats_get(rados_ioctx_t io, rbd_pool_stats_t stats);
+func GetAllPoolStats(ioctx *rados.IOContext) (map[PoolStatOption]uint64, error) {
+	var omap = make(map[PoolStatOption]uint64)
+	if ioctx == nil {
+		return omap, ErrNoIOContext
+	}
+
+	poolstats := poolStatsCreate()
+	defer func() {
+		poolstats.destroy()
+	}()
+
+	var keys [8]PoolStatOption
+
+	keys[0] = PoolStatOptionImages
+	keys[1] = PoolStatOptionImageProvisionedBytes
+	keys[2] = PoolStatOptionImageMaxProvisionedBytes
+	keys[3] = PoolStatOptionImageSnapshots
+	keys[4] = PoolStatOptionTrashImages
+	keys[5] = PoolStatOptionTrashProvisionedBytes
+	keys[6] = PoolStatOptionTrashMaxProvisionedBytes
+	keys[7] = PoolStatOptionTrashSnapshots
+
+	ovalArray := make([]uint64, len(keys))
+
+	// add option with the address where the respective value would be stored.
+	for i, key := range keys {
+		err := poolstats.addPoolStatOption(key, &ovalArray[i])
+		if err != nil {
+			return omap, err
+		}
+	}
+
+	ret := C.rbd_pool_stats_get(cephIoctx(ioctx), poolstats.stats)
+	if ret < 0 {
+		return omap, getError(ret)
+	}
+
+	for j, key := range keys {
+		omap[key] = ovalArray[j]
+	}
+	return omap, nil
+}

vendor/github.com/ceph/go-ceph/rbd/rbd.go

@@ -11,13 +11,14 @@ package rbd
 import "C"
 
 import (
-	"bytes"
 	"errors"
 	"io"
 	"time"
 	"unsafe"
 
+	"github.com/ceph/go-ceph/internal/cutil"
 	"github.com/ceph/go-ceph/internal/retry"
+	ts "github.com/ceph/go-ceph/internal/timespec"
 	"github.com/ceph/go-ceph/rados"
 )
 
@@ -45,6 +46,9 @@ const (
 	NoSnapshot = ""
 )
 
+// Timespec is a public type for the internal C 'struct timespec'
+type Timespec ts.Timespec
+
 // ImageInfo represents the status information for an image.
 type ImageInfo struct {
 	Size              uint64
@@ -52,8 +56,6 @@ type ImageInfo struct {
 	Num_objs          uint64
 	Order             int
 	Block_name_prefix string
-	Parent_pool       int64
-	Parent_name       string
 }
 
 // SnapInfo represents the status information for a snapshot.
@@ -91,18 +93,6 @@ type TrashInfo struct {
 	DefermentEndTime time.Time // Date / time after which the trashed RBD may be permanently deleted.
 }
 
-//
-func split(buf []byte) (values []string) {
-	tmp := bytes.Split(buf[:len(buf)-1], []byte{0})
-	for _, s := range tmp {
-		if len(s) > 0 {
-			go_s := C.GoString((*C.char)(unsafe.Pointer(&s[0])))
-			values = append(values, go_s)
-		}
-	}
-	return values
-}
-
 // cephIoctx returns a ceph rados_ioctx_t given a go-ceph rados IOContext.
 func cephIoctx(radosIoctx *rados.IOContext) C.rados_ioctx_t {
 	return C.rados_ioctx_t(radosIoctx.Pointer())
@@ -178,7 +168,7 @@ func Create(ioctx *rados.IOContext, name string, size uint64, order int,
 	}
 
 	if ret < 0 {
-		return nil, RBDError(ret)
+		return nil, rbdError(ret)
 	}
 
 	return &Image{
@@ -204,7 +194,7 @@ func Create2(ioctx *rados.IOContext, name string, size uint64, features uint64,
 	ret = C.rbd_create2(cephIoctx(ioctx), c_name,
 		C.uint64_t(size), C.uint64_t(features), &c_order)
 	if ret < 0 {
-		return nil, RBDError(ret)
+		return nil, rbdError(ret)
 	}
 
 	return &Image{
@@ -233,7 +223,7 @@ func Create3(ioctx *rados.IOContext, name string, size uint64, features uint64,
 		C.uint64_t(size), C.uint64_t(features), &c_order,
 		C.uint64_t(stripe_unit), C.uint64_t(stripe_count))
 	if ret < 0 {
-		return nil, RBDError(ret)
+		return nil, rbdError(ret)
 	}
 
 	return &Image{
@@ -267,7 +257,7 @@ func (image *Image) Clone(snapname string, c_ioctx *rados.IOContext, c_name stri
 		cephIoctx(c_ioctx),
 		c_c_name, C.uint64_t(features), &c_order)
 	if ret < 0 {
-		return nil, RBDError(ret)
+		return nil, rbdError(ret)
 	}
 
 	return &Image{
@@ -316,7 +306,7 @@ func (image *Image) Rename(destname string) error {
 	defer C.free(unsafe.Pointer(c_srcname))
 	defer C.free(unsafe.Pointer(c_destname))
 
-	err := RBDError(C.rbd_rename(cephIoctx(image.ioctx),
+	err := rbdError(C.rbd_rename(cephIoctx(image.ioctx),
 		c_srcname, c_destname))
 	if err == 0 {
 		image.name = destname
@@ -377,7 +367,7 @@ func (image *Image) Close() error {
 	}
 
 	if ret := C.rbd_close(image.image); ret != 0 {
-		return RBDError(ret)
+		return rbdError(ret)
 	}
 
 	image.image = nil
@@ -408,7 +398,7 @@ func (image *Image) Stat() (info *ImageInfo, err error) {
 	var c_stat C.rbd_image_info_t
 
 	if ret := C.rbd_stat(image.image, &c_stat, C.size_t(unsafe.Sizeof(info))); ret < 0 {
-		return info, RBDError(ret)
+		return info, rbdError(ret)
 	}
 
 	return &ImageInfo{
@@ -416,9 +406,7 @@ func (image *Image) Stat() (info *ImageInfo, err error) {
 		Obj_size:          uint64(c_stat.obj_size),
 		Num_objs:          uint64(c_stat.num_objs),
 		Order:             int(c_stat.order),
-		Block_name_prefix: C.GoString((*C.char)(&c_stat.block_name_prefix[0])),
-		Parent_pool:       int64(c_stat.parent_pool),
-		Parent_name:       C.GoString((*C.char)(&c_stat.parent_name[0]))}, nil
+		Block_name_prefix: C.GoString((*C.char)(&c_stat.block_name_prefix[0]))}, nil
 }
 
 // IsOldFormat returns true if the rbd image uses the old format.
@@ -434,7 +422,7 @@ func (image *Image) IsOldFormat() (old_format bool, err error) {
 	ret := C.rbd_get_old_format(image.image,
 		&c_old_format)
 	if ret < 0 {
-		return false, RBDError(ret)
+		return false, rbdError(ret)
 	}
 
 	return c_old_format != 0, nil
@@ -450,7 +438,7 @@ func (image *Image) GetSize() (size uint64, err error) {
 	}
 
 	if ret := C.rbd_get_size(image.image, (*C.uint64_t)(&size)); ret < 0 {
-		return 0, RBDError(ret)
+		return 0, rbdError(ret)
 	}
 
 	return size, nil
@@ -466,7 +454,7 @@ func (image *Image) GetStripeUnit() (stripe_unit uint64, err error) {
 	}
 
 	if ret := C.rbd_get_stripe_unit(image.image, (*C.uint64_t)(&stripe_unit)); ret < 0 {
-		return 0, RBDError(ret)
+		return 0, rbdError(ret)
 	}
 
 	return stripe_unit, nil
@@ -482,7 +470,7 @@ func (image *Image) GetStripeCount() (stripe_count uint64, err error) {
 	}
 
 	if ret := C.rbd_get_stripe_count(image.image, (*C.uint64_t)(&stripe_count)); ret < 0 {
-		return 0, RBDError(ret)
+		return 0, rbdError(ret)
 	}
 
 	return stripe_count, nil
@@ -499,7 +487,7 @@ func (image *Image) GetOverlap() (overlap uint64, err error) {
 	}
 
 	if ret := C.rbd_get_overlap(image.image, (*C.uint64_t)(&overlap)); ret < 0 {
-		return overlap, RBDError(ret)
+		return overlap, rbdError(ret)
 	}
 
 	return overlap, nil
@@ -598,12 +586,12 @@ func (image *Image) ListLockers() (tag string, lockers []Locker, err error) {
 	// but *0* is unexpected here because first rbd_list_lockers already
 	// dealt with no locker case
 	if int(c_locker_cnt) <= 0 {
-		return "", nil, RBDError(c_locker_cnt)
+		return "", nil, rbdError(c_locker_cnt)
 	}
 
-	clients := split(clients_buf)
-	cookies := split(cookies_buf)
-	addrs := split(addrs_buf)
+	clients := cutil.SplitSparseBuffer(clients_buf)
+	cookies := cutil.SplitSparseBuffer(cookies_buf)
+	addrs := cutil.SplitSparseBuffer(addrs_buf)
 
 	lockers = make([]Locker, c_locker_cnt)
 	for i := 0; i < int(c_locker_cnt); i++ {
@@ -704,7 +692,7 @@ func (image *Image) Read(data []byte) (int, error) {
 		(*C.char)(unsafe.Pointer(&data[0]))))
 
 	if ret < 0 {
-		return 0, RBDError(ret)
+		return 0, rbdError(ret)
 	}
 
 	image.offset += int64(ret)
@@ -729,7 +717,7 @@ func (image *Image) Write(data []byte) (n int, err error) {
 	}
 
 	if ret != len(data) {
-		err = RBDError(-C.EPERM)
+		err = rbdError(-C.EPERM)
 	}
 
 	return ret, err
@@ -767,7 +755,7 @@ func (image *Image) Discard(ofs uint64, length uint64) (int, error) {
 
 	ret := C.rbd_discard(image.image, C.uint64_t(ofs), C.uint64_t(length))
 	if ret < 0 {
-		return 0, RBDError(ret)
+		return 0, rbdError(ret)
 	}
 
 	return int(ret), nil
@@ -790,7 +778,7 @@ func (image *Image) ReadAt(data []byte, off int64) (int, error) {
 		(*C.char)(unsafe.Pointer(&data[0]))))
 
 	if ret < 0 {
-		return 0, RBDError(ret)
+		return 0, rbdError(ret)
 	}
 
 	if ret < len(data) {
@@ -814,7 +802,7 @@ func (image *Image) WriteAt(data []byte, off int64) (n int, err error) {
 		C.size_t(len(data)), (*C.char)(unsafe.Pointer(&data[0]))))
 
 	if ret != len(data) {
-		err = RBDError(-C.EPERM)
+		err = rbdError(-C.EPERM)
 	}
 
 	return ret, err
@@ -852,7 +840,7 @@ func (image *Image) GetSnapshotNames() (snaps []SnapInfo, err error) {
 	ret = C.rbd_snap_list(image.image,
 		&c_snaps[0], &c_max_snaps)
 	if ret < 0 {
-		return nil, RBDError(ret)
+		return nil, rbdError(ret)
 	}
 
 	for i, s := range c_snaps {
@@ -913,7 +901,7 @@ func (image *Image) SetMetadata(key string, value string) error {
 
 	ret := C.rbd_metadata_set(image.image, c_key, c_value)
 	if ret < 0 {
-		return RBDError(ret)
+		return rbdError(ret)
 	}
 
 	return nil
@@ -933,7 +921,7 @@ func (image *Image) RemoveMetadata(key string) error {
 
 	ret := C.rbd_metadata_remove(image.image, c_key)
 	if ret < 0 {
-		return RBDError(ret)
+		return rbdError(ret)
 	}
 
 	return nil
@@ -1205,7 +1193,7 @@ func CreateImage(ioctx *rados.IOContext, name string, size uint64, rio *ImageOpt
 		return ErrNoName
 	}
 	if rio == nil {
-		return RBDError(C.EINVAL)
+		return rbdError(C.EINVAL)
 	}
 
 	c_name := C.CString(name)
@@ -1244,7 +1232,7 @@ func CloneImage(ioctx *rados.IOContext, parentName, snapName string,
 	destctx *rados.IOContext, name string, rio *ImageOptions) error {
 
 	if rio == nil {
-		return RBDError(C.EINVAL)
+		return rbdError(C.EINVAL)
 	}
 
 	cParentName := C.CString(parentName)

vendor/github.com/ceph/go-ceph/rbd/rbd_mimic.go

@@ -12,9 +12,9 @@ package rbd
 import "C"
 
 import (
-	"bytes"
 	"unsafe"
 
+	"github.com/ceph/go-ceph/internal/cutil"
 	"github.com/ceph/go-ceph/internal/retry"
 	"github.com/ceph/go-ceph/rados"
 )
@@ -37,12 +37,6 @@ func GetImageNames(ioctx *rados.IOContext) (names []string, err error) {
 	if err != nil {
 		return nil, err
 	}
-	tmp := bytes.Split(buf[:csize-1], []byte{0})
-	for _, s := range tmp {
-		if len(s) > 0 {
-			name := C.GoString((*C.char)(unsafe.Pointer(&s[0])))
-			names = append(names, name)
-		}
-	}
+	names = cutil.SplitSparseBuffer(buf[:csize])
 	return names, nil
 }

vendor/github.com/ceph/go-ceph/rbd/rbd_nautilus.go

@@ -1,6 +1,7 @@
 // +build !luminous,!mimic
 //
-// Ceph Nautilus is the first release that includes rbd_list2().
+// Ceph Nautilus is the first release that includes rbd_list2() and
+// rbd_get_create_timestamp().
 
 package rbd
 
@@ -14,6 +15,7 @@ import (
 	"unsafe"
 
 	"github.com/ceph/go-ceph/internal/retry"
+	ts "github.com/ceph/go-ceph/internal/timespec"
 	"github.com/ceph/go-ceph/rados"
 )
 
@@ -45,3 +47,57 @@ func GetImageNames(ioctx *rados.IOContext) ([]string, error) {
 	}
 	return names, nil
 }
+
+// GetCreateTimestamp returns the time the rbd image was created.
+//
+// Implements:
+//  int rbd_get_create_timestamp(rbd_image_t image, struct timespec *timestamp);
+func (image *Image) GetCreateTimestamp() (Timespec, error) {
+	if err := image.validate(imageIsOpen); err != nil {
+		return Timespec{}, err
+	}
+
+	var cts C.struct_timespec
+
+	if ret := C.rbd_get_create_timestamp(image.image, &cts); ret < 0 {
+		return Timespec{}, getError(ret)
+	}
+
+	return Timespec(ts.CStructToTimespec(ts.CTimespecPtr(&cts))), nil
+}
+
+// GetAccessTimestamp returns the time the rbd image was last accessed.
+//
+// Implements:
+//  int rbd_get_access_timestamp(rbd_image_t image, struct timespec *timestamp);
+func (image *Image) GetAccessTimestamp() (Timespec, error) {
+	if err := image.validate(imageIsOpen); err != nil {
+		return Timespec{}, err
+	}
+
+	var cts C.struct_timespec
+
+	if ret := C.rbd_get_access_timestamp(image.image, &cts); ret < 0 {
+		return Timespec{}, getError(ret)
+	}
+
+	return Timespec(ts.CStructToTimespec(ts.CTimespecPtr(&cts))), nil
+}
+
+// GetModifyTimestamp returns the time the rbd image was last modified.
+//
+// Implements:
+//  int rbd_get_modify_timestamp(rbd_image_t image, struct timespec *timestamp);
+func (image *Image) GetModifyTimestamp() (Timespec, error) {
+	if err := image.validate(imageIsOpen); err != nil {
+		return Timespec{}, err
+	}
+
+	var cts C.struct_timespec
+
+	if ret := C.rbd_get_modify_timestamp(image.image, &cts); ret < 0 {
+		return Timespec{}, getError(ret)
+	}
+
+	return Timespec(ts.CStructToTimespec(ts.CTimespecPtr(&cts))), nil
+}

vendor/github.com/ceph/go-ceph/rbd/snapshot.go

@@ -30,7 +30,7 @@ func (image *Image) CreateSnapshot(snapname string) (*Snapshot, error) {
 
 	ret := C.rbd_snap_create(image.image, c_snapname)
 	if ret < 0 {
-		return nil, RBDError(ret)
+		return nil, rbdError(ret)
 	}
 
 	return &Snapshot{
@@ -139,7 +139,7 @@ func (snapshot *Snapshot) IsProtected() (bool, error) {
 	ret := C.rbd_snap_is_protected(snapshot.image.image, c_snapname,
 		&c_is_protected)
 	if ret < 0 {
-		return false, RBDError(ret)
+		return false, rbdError(ret)
 	}
 
 	return c_is_protected != 0, nil

vendor/github.com/ceph/go-ceph/rbd/snapshot_mimic.go

@@ -12,8 +12,9 @@ package rbd
 import "C"
 
 import (
-	"bytes"
 	"unsafe"
+
+	"github.com/ceph/go-ceph/internal/cutil"
 )
 
 // GetParentInfo looks for the parent of the image and stores the pool, name
@@ -40,7 +41,7 @@ func (image *Image) GetParentInfo(p_pool, p_name, p_snapname []byte) error {
 	if ret == 0 {
 		return nil
 	} else {
-		return RBDError(ret)
+		return rbdError(ret)
 	}
 }
 
@@ -66,7 +67,7 @@ func (image *Image) ListChildren() (pools []string, images []string, err error)
 		return nil, nil, nil
 	}
 	if ret < 0 && ret != -C.ERANGE {
-		return nil, nil, RBDError(ret)
+		return nil, nil, rbdError(ret)
 	}
 
 	pools_buf := make([]byte, c_pools_len)
@@ -78,24 +79,10 @@ func (image *Image) ListChildren() (pools []string, images []string, err error)
 		(*C.char)(unsafe.Pointer(&images_buf[0])),
 		&c_images_len)
 	if ret < 0 {
-		return nil, nil, RBDError(ret)
-	}
-
-	tmp := bytes.Split(pools_buf[:c_pools_len-1], []byte{0})
-	for _, s := range tmp {
-		if len(s) > 0 {
-			name := C.GoString((*C.char)(unsafe.Pointer(&s[0])))
-			pools = append(pools, name)
-		}
-	}
-
-	tmp = bytes.Split(images_buf[:c_images_len-1], []byte{0})
-	for _, s := range tmp {
-		if len(s) > 0 {
-			name := C.GoString((*C.char)(unsafe.Pointer(&s[0])))
-			images = append(images, name)
-		}
+		return nil, nil, rbdError(ret)
 	}
 
+	pools = cutil.SplitSparseBuffer(pools_buf[:c_pools_len])
+	images = cutil.SplitSparseBuffer(images_buf[:c_images_len])
 	return pools, images, nil
 }

vendor/github.com/ceph/go-ceph/rbd/snapshot_namespace.go

@@ -0,0 +1,80 @@
+// +build !luminous
+//
+// Ceph Mimic introduced rbd_snap_get_namespace_type().
+
+package rbd
+
+// #cgo LDFLAGS: -lrbd
+// #include <rbd/librbd.h>
+import "C"
+
+import (
+	"unsafe"
+
+	"github.com/ceph/go-ceph/internal/retry"
+)
+
+// SnapNamespaceType indicates the namespace to which the snapshot belongs to.
+type SnapNamespaceType C.rbd_snap_namespace_type_t
+
+const (
+	// SnapNamespaceTypeUser indicates that the snapshot belongs to user namespace.
+	SnapNamespaceTypeUser = SnapNamespaceType(C.RBD_SNAP_NAMESPACE_TYPE_USER)
+
+	// SnapNamespaceTypeGroup indicates that the snapshot belongs to group namespace.
+	// Such snapshots will have associated group information.
+	SnapNamespaceTypeGroup = SnapNamespaceType(C.RBD_SNAP_NAMESPACE_TYPE_GROUP)
+
+	// SnapNamespaceTypeTrash indicates that the snapshot belongs to trash namespace.
+	SnapNamespaceTypeTrash = SnapNamespaceType(C.RBD_SNAP_NAMESPACE_TYPE_TRASH)
+)
+
+// GetSnapNamespaceType gets the type of namespace to which the snapshot belongs to,
+// returns error on failure.
+//
+// Implements:
+//  int rbd_snap_get_namespace_type(rbd_image_t image, uint64_t snap_id, rbd_snap_namespace_type_t *namespace_type)
+func (image *Image) GetSnapNamespaceType(snapID uint64) (SnapNamespaceType, error) {
+	var nsType SnapNamespaceType
+
+	if err := image.validate(imageIsOpen); err != nil {
+		return nsType, err
+	}
+
+	ret := C.rbd_snap_get_namespace_type(image.image,
+		C.uint64_t(snapID),
+		(*C.rbd_snap_namespace_type_t)(&nsType))
+	return nsType, getError(ret)
+}
+
+// GetSnapTrashNamespace returns the original name of the snapshot which was
+// moved to the Trash. The caller should make sure that the snapshot ID passed in this
+// function belongs to a snapshot already in the Trash.
+//
+// Implements:
+//  int rbd_snap_get_trash_namespace(rbd_image_t image, uint64_t snap_id, char *original_name, size_t max_length)
+func (image *Image) GetSnapTrashNamespace(snapID uint64) (string, error) {
+	if err := image.validate(imageIsOpen); err != nil {
+		return "", err
+	}
+
+	var (
+		buf []byte
+		err error
+	)
+	retry.WithSizes(4096, 262144, func(length int) retry.Hint {
+		cLength := C.size_t(length)
+		buf = make([]byte, cLength)
+		ret := C.rbd_snap_get_trash_namespace(image.image,
+			C.uint64_t(snapID),
+			(*C.char)(unsafe.Pointer(&buf[0])),
+			cLength)
+		err = getError(ret)
+		return retry.Size(int(cLength)).If(err == errRange)
+	})
+
+	if err != nil {
+		return "", err
+	}
+	return C.GoString((*C.char)(unsafe.Pointer(&buf[0]))), nil
+}

vendor/github.com/ceph/go-ceph/rbd/snapshot_nautilus.go

@@ -32,7 +32,7 @@ func (image *Image) GetParentInfo(pool, name, snapname []byte) error {
 	parentSnap := C.rbd_snap_spec_t{}
 	ret := C.rbd_get_parent(image.image, &parentImage, &parentSnap)
 	if ret != 0 {
-		return RBDError(ret)
+		return rbdError(ret)
 	}
 
 	defer C.rbd_linked_image_spec_cleanup(&parentImage)
@@ -40,26 +40,26 @@ func (image *Image) GetParentInfo(pool, name, snapname []byte) error {
 
 	strlen := int(C.strlen(parentImage.pool_name))
 	if len(pool) < strlen {
-		return RBDError(C.ERANGE)
+		return rbdError(C.ERANGE)
 	}
 	if copy(pool, C.GoString(parentImage.pool_name)) != strlen {
-		return RBDError(C.ERANGE)
+		return rbdError(C.ERANGE)
 	}
 
 	strlen = int(C.strlen(parentImage.image_name))
 	if len(name) < strlen {
-		return RBDError(C.ERANGE)
+		return rbdError(C.ERANGE)
 	}
 	if copy(name, C.GoString(parentImage.image_name)) != strlen {
-		return RBDError(C.ERANGE)
+		return rbdError(C.ERANGE)
 	}
 
 	strlen = int(C.strlen(parentSnap.name))
 	if len(snapname) < strlen {
-		return RBDError(C.ERANGE)
+		return rbdError(C.ERANGE)
 	}
 	if copy(snapname, C.GoString(parentSnap.name)) != strlen {
-		return RBDError(C.ERANGE)
+		return rbdError(C.ERANGE)
 	}
 
 	return nil

vendor/github.com/ceph/go-ceph/rbd/watchers_mimic.go

@@ -4,12 +4,30 @@
 
 package rbd
 
-// #cgo LDFLAGS: -lrbd
-// #include <errno.h>
-// #include <rbd/librbd.h>
+/*
+#cgo LDFLAGS: -lrbd
+#include <rbd/librbd.h>
+
+extern void imageWatchCallback(void *);
+
+// cgo has trouble converting the types of the callback and data arg defined in
+// librbd header. It wants the callback function to be a byte pointer and
+// the arg to be a pointer, which is pretty much the opposite of what we
+// actually want. This shim exists to help coerce the auto-type-conversion
+// to do the right thing for us.
+static inline int wrap_rbd_update_watch(
+			rbd_image_t image,
+			uint64_t *handle,
+			uintptr_t index) {
+	return rbd_update_watch(image, handle, imageWatchCallback, (void*)index);
+}
+*/
 import "C"
 
 import (
+	"unsafe"
+
+	"github.com/ceph/go-ceph/internal/callbacks"
 	"github.com/ceph/go-ceph/internal/retry"
 )
 
@@ -59,3 +77,76 @@ func (image *Image) ListWatchers() ([]ImageWatcher, error) {
 	}
 	return imageWatchers, nil
 }
+
+// watchCallbacks tracks the active callbacks for rbd watches
+var watchCallbacks = callbacks.New()
+
+// WatchCallback defines the function signature needed for the UpdateWatch
+// callback.
+type WatchCallback func(interface{})
+
+type watchCallbackCtx struct {
+	callback WatchCallback
+	data     interface{}
+}
+
+// Watch represents an ongoing image metadata watch.
+type Watch struct {
+	image   *Image
+	wcc     watchCallbackCtx
+	handle  C.uint64_t
+	cbIndex int
+}
+
+// UpdateWatch updates the image object to watch metadata changes to the
+// image, returning a Watch object.
+//
+// Implements:
+//  int rbd_update_watch(rbd_image_t image, uint64_t *handle,
+//                       rbd_update_callback_t watch_cb, void *arg);
+func (image *Image) UpdateWatch(cb WatchCallback, data interface{}) (*Watch, error) {
+	if err := image.validate(imageIsOpen); err != nil {
+		return nil, err
+	}
+	wcc := watchCallbackCtx{
+		callback: cb,
+		data:     data,
+	}
+	w := &Watch{
+		image:   image,
+		wcc:     wcc,
+		cbIndex: watchCallbacks.Add(wcc),
+	}
+
+	ret := C.wrap_rbd_update_watch(
+		image.image,
+		&w.handle,
+		C.uintptr_t(w.cbIndex))
+	if ret != 0 {
+		return nil, getError(ret)
+	}
+	return w, nil
+}
+
+// Unwatch un-registers the image watch.
+//
+// Implements:
+//  int rbd_update_unwatch(rbd_image_t image, uint64_t handle);
+func (w *Watch) Unwatch() error {
+	if w.image == nil {
+		return ErrImageNotOpen
+	}
+	if err := w.image.validate(imageIsOpen); err != nil {
+		return err
+	}
+	ret := C.rbd_update_unwatch(w.image.image, w.handle)
+	watchCallbacks.Remove(w.cbIndex)
+	return getError(ret)
+}
+
+//export imageWatchCallback
+func imageWatchCallback(index unsafe.Pointer) {
+	v := watchCallbacks.Lookup(int(uintptr(index)))
+	wcc := v.(watchCallbackCtx)
+	wcc.callback(wcc.data)
+}