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>

go.mod

@@ -3,7 +3,7 @@ module github.com/ceph/ceph-csi
 go 1.13
 
 require (
-	github.com/ceph/go-ceph v0.4.0
+	github.com/ceph/go-ceph v0.5.0
 	github.com/container-storage-interface/spec v1.2.0
 	github.com/docker/spdystream v0.0.0-20181023171402-6480d4af844c // indirect
 	github.com/golang/groupcache v0.0.0-20200121045136-8c9f03a8e57e // indirect

go.sum

@@ -62,8 +62,8 @@ github.com/bradfitz/go-smtpd v0.0.0-20170404230938-deb6d6237625/go.mod h1:HYsPBT
 github.com/caddyserver/caddy v1.0.3/go.mod h1:G+ouvOY32gENkJC+jhgl62TyhvqEsFaDiZ4uw0RzP1E=
 github.com/cenkalti/backoff v2.1.1+incompatible/go.mod h1:90ReRw6GdpyfrHakVjL/QHaoyV4aDUVVkXQJJJ3NXXM=
 github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
-github.com/ceph/go-ceph v0.4.0 h1:KJsT6j1IbsEtui3ZtDcZO//uZ+IVBNT6KO7u9PuMovE=
-github.com/ceph/go-ceph v0.4.0/go.mod h1:wd+keAOqrcsN//20VQnHBGtnBnY0KHl0PA024Ng8HfQ=
+github.com/ceph/go-ceph v0.5.0 h1:x5VmFq19Op6DjzWuxAUG3wZZoC3L160Rt6pJOOiRfW0=
+github.com/ceph/go-ceph v0.5.0/go.mod h1:wd+keAOqrcsN//20VQnHBGtnBnY0KHl0PA024Ng8HfQ=
 github.com/cespare/prettybench v0.0.0-20150116022406-03b8cfe5406c/go.mod h1:Xe6ZsFhtM8HrDku0pxJ3/Lr51rwykrzgFwpmTzleatY=
 github.com/cespare/xxhash/v2 v2.1.1 h1:6MnRN8NT7+YBpUIWxHtefFZOKTAPgGjpQSxqLNn0+qY=
 github.com/cespare/xxhash/v2 v2.1.1/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=

vendor/github.com/ceph/go-ceph/internal/cutil/splitbuf.go

@@ -0,0 +1,49 @@
+package cutil
+
+import "C"
+
+import (
+	"bytes"
+)
+
+// SplitBuffer splits a byte-slice buffer, typically returned from C code,
+// into a slice of strings.
+// The contents of the buffer are assumed to be null-byte separated.
+// If the buffer contains a sequence of null-bytes it will assume that the
+// "space" between the bytes are meant to be empty strings.
+func SplitBuffer(b []byte) []string {
+	return splitBufStrings(b, true)
+}
+
+// SplitSparseBuffer splits a byte-slice buffer, typically returned from C code,
+// into a slice of strings.
+// The contents of the buffer are assumed to be null-byte separated.
+// This function assumes that buffer to be "sparse" such that only non-null-byte
+// strings will be returned, and no "empty" strings exist if null-bytes
+// are found adjacent to each other.
+func SplitSparseBuffer(b []byte) []string {
+	return splitBufStrings(b, false)
+}
+
+// If keepEmpty is true, empty substrings will be returned, by default they are
+// excluded from the results.
+// This is almost certainly a suboptimal implementation, especially for
+// keepEmpty=true case. Optimizing the functions is a job for another day.
+func splitBufStrings(b []byte, keepEmpty bool) []string {
+	values := make([]string, 0)
+	// the final null byte should be the terminating null in C
+	// we never want to preserve the empty string after it
+	if len(b) > 0 && b[len(b)-1] == 0 {
+		b = b[:len(b)-1]
+	}
+	if len(b) == 0 {
+		return values
+	}
+	for _, s := range bytes.Split(b, []byte{0}) {
+		if !keepEmpty && len(s) == 0 {
+			continue
+		}
+		values = append(values, string(s))
+	}
+	return values
+}

vendor/github.com/ceph/go-ceph/internal/errutil/strerror.go

@@ -14,6 +14,7 @@ package errutil
 import "C"
 
 import (
+	"fmt"
 	"unsafe"
 )
 
@@ -37,9 +38,15 @@ func FormatErrno(errno int) (int, string) {
 	return errno, C.GoString((*C.char)(unsafe.Pointer(&buf[0])))
 }
 
-// StrError returns a string describing the errno. The string will be empty if
-// the errno is not known.
-func StrError(errno int) string {
-	_, s := FormatErrno(errno)
-	return s
+// FormatErrorCode returns a string that describes the supplied error source
+// and error code as a string. Suitable to use in Error() methods.  If the
+// error code maps to an errno the string will contain a description of the
+// error. Otherwise the string will only indicate the source and value if the
+// value does not map to a known errno.
+func FormatErrorCode(source string, errValue int) string {
+	_, s := FormatErrno(errValue)
+	if s == "" {
+		return fmt.Sprintf("%s: ret=%d", source, errValue)
+	}
+	return fmt.Sprintf("%s: ret=%d, %s", source, errValue, s)
 }

vendor/github.com/ceph/go-ceph/internal/timespec/timespec.go

@@ -0,0 +1,30 @@
+package timespec
+
+/*
+#include <time.h>
+*/
+import "C"
+
+import (
+	"unsafe"
+
+	"golang.org/x/sys/unix"
+)
+
+// Timespec behaves similarly to C's struct timespec.
+// Timespec is used to retain fidelity to the C based file systems
+// apis that could be lossy with the use of Go time types.
+type Timespec unix.Timespec
+
+// CTimespecPtr is an unsafe pointer wrapping C's `struct timespec`.
+type CTimespecPtr unsafe.Pointer
+
+// CStructToTimespec creates a new Timespec for the C 'struct timespec'.
+func CStructToTimespec(cts CTimespecPtr) Timespec {
+	t := (*C.struct_timespec)(cts)
+
+	return Timespec{
+		Sec:  int64(t.tv_sec),
+		Nsec: int64(t.tv_nsec),
+	}
+}

vendor/github.com/ceph/go-ceph/rados/conn.go

@@ -6,12 +6,14 @@ package rados
 import "C"
 
 import (
-	"bytes"
 	"unsafe"
 
+	"github.com/ceph/go-ceph/internal/cutil"
 	"github.com/ceph/go-ceph/internal/retry"
 )
 
+var argvPlaceholder = "placeholder"
+
 // ClusterStat represents Ceph cluster statistics.
 type ClusterStat struct {
 	Kb          uint64
@@ -117,14 +119,7 @@ func (c *Conn) ListPools() (names []string, err error) {
 			continue
 		}
 
-		tmp := bytes.SplitAfter(buf[:ret-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[:ret])
 		return names, nil
 	}
 }
@@ -197,28 +192,47 @@ func (c *Conn) GetClusterStats() (stat ClusterStat, err error) {
 	}, nil
 }
 
-// ParseCmdLineArgs configures the connection from command line arguments.
-func (c *Conn) ParseCmdLineArgs(args []string) error {
-	// add an empty element 0 -- Ceph treats the array as the actual contents
-	// of argv and skips the first element (the executable name)
-	argc := C.int(len(args) + 1)
-	argv := make([]*C.char, argc)
-
-	// make the first element a string just in case it is ever examined
-	argv[0] = C.CString("placeholder")
-	defer C.free(unsafe.Pointer(argv[0]))
-
-	for i, arg := range args {
-		argv[i+1] = C.CString(arg)
-		defer C.free(unsafe.Pointer(argv[i+1]))
+// ParseConfigArgv configures the connection using a unix style command line
+// argument vector.
+//
+// Implements:
+//  int rados_conf_parse_argv(rados_t cluster, int argc,
+//                            const char **argv);
+func (c *Conn) ParseConfigArgv(argv []string) error {
+	if c.cluster == nil {
+		return ErrNotConnected
+	}
+	if len(argv) == 0 {
+		return ErrEmptyArgument
+	}
+	cargv := make([]*C.char, len(argv))
+	for i := range argv {
+		cargv[i] = C.CString(argv[i])
+		defer C.free(unsafe.Pointer(cargv[i]))
 	}
 
-	ret := C.rados_conf_parse_argv(c.cluster, argc, &argv[0])
+	ret := C.rados_conf_parse_argv(c.cluster, C.int(len(cargv)), &cargv[0])
 	return getError(ret)
 }
 
+// ParseCmdLineArgs configures the connection from command line arguments.
+//
+// This function passes a placeholder value to Ceph as argv[0], see
+// ParseConfigArgv for a version of this function that allows the caller to
+// specify argv[0].
+func (c *Conn) ParseCmdLineArgs(args []string) error {
+	argv := make([]string, len(args)+1)
+	// Ceph expects a proper argv array as the actual contents with the
+	// first element containing the executable name
+	argv[0] = argvPlaceholder
+	for i := range args {
+		argv[i+1] = args[i]
+	}
+	return c.ParseConfigArgv(argv)
+}
+
 // ParseDefaultConfigEnv configures the connection from the default Ceph
-// environment variable(s).
+// environment variable CEPH_ARGS.
 func (c *Conn) ParseDefaultConfigEnv() error {
 	ret := C.rados_conf_parse_env(c.cluster, nil)
 	return getError(ret)
@@ -273,7 +287,7 @@ func (c *Conn) GetPoolByName(name string) (int64, error) {
 	defer C.free(unsafe.Pointer(c_name))
 	ret := int64(C.rados_pool_lookup(c.cluster, c_name))
 	if ret < 0 {
-		return 0, RadosError(ret)
+		return 0, radosError(ret)
 	}
 	return ret, nil
 }
@@ -287,7 +301,7 @@ func (c *Conn) GetPoolByID(id int64) (string, error) {
 	c_id := C.int64_t(id)
 	ret := int(C.rados_pool_reverse_lookup(c.cluster, c_id, (*C.char)(unsafe.Pointer(&buf[0])), C.size_t(len(buf))))
 	if ret < 0 {
-		return "", RadosError(ret)
+		return "", radosError(ret)
 	}
 	return C.GoString((*C.char)(unsafe.Pointer(&buf[0]))), nil
 }

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

@@ -7,32 +7,27 @@ import "C"
 
 import (
 	"errors"
-	"fmt"
 
 	"github.com/ceph/go-ceph/internal/errutil"
 )
 
-// revive:disable:exported Temporarily live with stuttering
+// radosError represents an error condition returned from the Ceph RADOS APIs.
+type radosError int
 
-// RadosError represents an error condition returned from the Ceph RADOS APIs.
-type RadosError int
-
-// revive:enable:exported
-
-// Error returns the error string for the RadosError type.
-func (e RadosError) Error() string {
-	errno, s := errutil.FormatErrno(int(e))
-	if s == "" {
-		return fmt.Sprintf("rados: ret=%d", errno)
+// Error returns the error string for the radosError type.
+func (e radosError) Error() string {
+	return errutil.FormatErrorCode("rados", int(e))
 }
-	return fmt.Sprintf("rados: ret=%d, %s", errno, s)
+
+func (e radosError) ErrorCode() int {
+	return int(e)
 }
 
 func getError(e C.int) error {
 	if e == 0 {
 		return nil
 	}
-	return RadosError(e)
+	return radosError(e)
 }
 
 // getErrorIfNegative converts a ceph return code to error if negative.
@@ -48,19 +43,26 @@ func getErrorIfNegative(ret C.int) error {
 // Public go errors:
 
 var (
-	// ErrNotConnected is returned when functions are called without a RADOS connection
+	// ErrNotConnected is returned when functions are called
+	// without a RADOS connection.
 	ErrNotConnected = errors.New("RADOS not connected")
+	// ErrEmptyArgument may be returned if a function argument is passed
+	// a zero-length slice or map.
+	ErrEmptyArgument = errors.New("Argument must contain at least one item")
+	// ErrInvalidIOContext may be returned if an api call requires an IOContext
+	// but IOContext is not ready for use.
+	ErrInvalidIOContext = errors.New("IOContext is not ready for use")
 )
 
-// Public RadosErrors:
+// Public radosErrors:
 
 const (
 	// ErrNotFound indicates a missing resource.
-	ErrNotFound = RadosError(-C.ENOENT)
+	ErrNotFound = radosError(-C.ENOENT)
 	// ErrPermissionDenied indicates a permissions issue.
-	ErrPermissionDenied = RadosError(-C.EPERM)
+	ErrPermissionDenied = radosError(-C.EPERM)
 	// ErrObjectExists indicates that an exclusive object creation failed.
-	ErrObjectExists = RadosError(-C.EEXIST)
+	ErrObjectExists = radosError(-C.EEXIST)
 
 	// RadosErrorNotFound indicates a missing resource.
 	//
@@ -75,7 +77,7 @@ const (
 // Private errors:
 
 const (
-	errNameTooLong = RadosError(-C.ENAMETOOLONG)
+	errNameTooLong = radosError(-C.ENAMETOOLONG)
 
-	errRange = RadosError(-C.ERANGE)
+	errRange = radosError(-C.ERANGE)
 )

vendor/github.com/ceph/go-ceph/rados/ioctx.go

@@ -92,6 +92,15 @@ type IOContext struct {
 	ioctx C.rados_ioctx_t
 }
 
+// validate returns an error if the ioctx is not ready to be used
+// with ceph C calls.
+func (ioctx *IOContext) validate() error {
+	if ioctx.ioctx == nil {
+		return ErrInvalidIOContext
+	}
+	return nil
+}
+
 // Pointer returns a pointer reference to an internal structure.
 // This function should NOT be used outside of go-ceph itself.
 func (ioctx *IOContext) Pointer() unsafe.Pointer {
@@ -249,6 +258,15 @@ func (ioctx *IOContext) GetPoolStats() (stat PoolStat, err error) {
 	}, nil
 }
 
+// GetPoolID returns the pool ID associated with the I/O context.
+//
+// Implements:
+//  int64_t rados_ioctx_get_id(rados_ioctx_t io)
+func (ioctx *IOContext) GetPoolID() int64 {
+	ret := C.rados_ioctx_get_id(ioctx.ioctx)
+	return int64(ret)
+}
+
 // GetPoolName returns the name of the pool associated with the I/O context.
 func (ioctx *IOContext) GetPoolName() (name string, err error) {
 	var (
@@ -589,7 +607,7 @@ func (ioctx *IOContext) ListLockers(oid, name string) (*LockInfo, error) {
 	}
 
 	if ret < 0 {
-		return nil, RadosError(ret)
+		return nil, radosError(ret)
 	}
 	return &LockInfo{int(ret), c_exclusive == 1, C.GoString(c_tag), splitCString(c_clients, c_clients_len), splitCString(c_cookies, c_cookies_len), splitCString(c_addrs, c_addrs_len)}, nil
 }
@@ -628,3 +646,16 @@ func (ioctx *IOContext) BreakLock(oid, name, client, cookie string) (int, error)
 		return int(ret), getError(ret)
 	}
 }
+
+// GetLastVersion will return the version number of the last object read or
+// written to.
+//
+// Implements:
+//  uint64_t rados_get_last_version(rados_ioctx_t io);
+func (ioctx *IOContext) GetLastVersion() (uint64, error) {
+	if err := ioctx.validate(); err != nil {
+		return 0, err
+	}
+	v := C.rados_get_last_version(ioctx.ioctx)
+	return uint64(v), nil
+}

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

@@ -0,0 +1,189 @@
+package rados
+
+// #cgo LDFLAGS: -lrados
+// #include <stdlib.h>
+// #include <rados/librados.h>
+import "C"
+
+import (
+	"time"
+	"unsafe"
+
+	"github.com/ceph/go-ceph/internal/retry"
+)
+
+// CreateSnap creates a pool-wide snapshot.
+//
+// Implements:
+// int rados_ioctx_snap_create(rados_ioctx_t io, const char *snapname)
+func (ioctx *IOContext) CreateSnap(snapName string) error {
+	if err := ioctx.validate(); err != nil {
+		return err
+	}
+
+	cSnapName := C.CString(snapName)
+	defer C.free(unsafe.Pointer(cSnapName))
+
+	ret := C.rados_ioctx_snap_create(ioctx.ioctx, cSnapName)
+	return getError(ret)
+}
+
+// RemoveSnap deletes the pool snapshot.
+//
+// Implements:
+//  int rados_ioctx_snap_remove(rados_ioctx_t io, const char *snapname)
+func (ioctx *IOContext) RemoveSnap(snapName string) error {
+	if err := ioctx.validate(); err != nil {
+		return err
+	}
+
+	cSnapName := C.CString(snapName)
+	defer C.free(unsafe.Pointer(cSnapName))
+
+	ret := C.rados_ioctx_snap_remove(ioctx.ioctx, cSnapName)
+	return getError(ret)
+}
+
+// SnapID represents the ID of a rados snapshot.
+type SnapID C.rados_snap_t
+
+// LookupSnap returns the ID of a pool snapshot.
+//
+// Implements:
+//  int rados_ioctx_snap_lookup(rados_ioctx_t io, const char *name, rados_snap_t *id)
+func (ioctx *IOContext) LookupSnap(snapName string) (SnapID, error) {
+	var snapID SnapID
+
+	if err := ioctx.validate(); err != nil {
+		return snapID, err
+	}
+
+	cSnapName := C.CString(snapName)
+	defer C.free(unsafe.Pointer(cSnapName))
+
+	ret := C.rados_ioctx_snap_lookup(
+		ioctx.ioctx,
+		cSnapName,
+		(*C.rados_snap_t)(&snapID))
+	return snapID, getError(ret)
+}
+
+// GetSnapName returns the name of a pool snapshot with the given snapshot ID.
+//
+// Implements:
+//  int rados_ioctx_snap_get_name(rados_ioctx_t io, rados_snap_t id, char *name, int maxlen)
+func (ioctx *IOContext) GetSnapName(snapID SnapID) (string, error) {
+	if err := ioctx.validate(); err != nil {
+		return "", err
+	}
+
+	var (
+		buf []byte
+		err error
+	)
+	// range from 1k to 64KiB
+	retry.WithSizes(1024, 1<<16, func(len int) retry.Hint {
+		cLen := C.int(len)
+		buf = make([]byte, cLen)
+		ret := C.rados_ioctx_snap_get_name(
+			ioctx.ioctx,
+			(C.rados_snap_t)(snapID),
+			(*C.char)(unsafe.Pointer(&buf[0])),
+			cLen)
+		err = getError(ret)
+		return retry.Size(int(cLen)).If(err == errRange)
+	})
+
+	if err != nil {
+		return "", err
+	}
+	return C.GoString((*C.char)(unsafe.Pointer(&buf[0]))), nil
+}
+
+// GetSnapStamp returns the time of the pool snapshot creation.
+//
+// Implements:
+//  int rados_ioctx_snap_get_stamp(rados_ioctx_t io, rados_snap_t id, time_t *t)
+func (ioctx *IOContext) GetSnapStamp(snapID SnapID) (time.Time, error) {
+	var cTime C.time_t
+
+	if err := ioctx.validate(); err != nil {
+		return time.Unix(int64(cTime), 0), err
+	}
+
+	ret := C.rados_ioctx_snap_get_stamp(
+		ioctx.ioctx,
+		(C.rados_snap_t)(snapID),
+		&cTime)
+	return time.Unix(int64(cTime), 0), getError(ret)
+}
+
+// ListSnaps returns a slice containing the SnapIDs of existing pool snapshots.
+//
+// Implements:
+//  int rados_ioctx_snap_list(rados_ioctx_t io, rados_snap_t *snaps, int maxlen)
+func (ioctx *IOContext) ListSnaps() ([]SnapID, error) {
+	if err := ioctx.validate(); err != nil {
+		return nil, err
+	}
+
+	var (
+		snapList []SnapID
+		cLen     C.int
+		err      error
+		ret      C.int
+	)
+	retry.WithSizes(100, 1000, func(maxlen int) retry.Hint {
+		cLen = C.int(maxlen)
+		snapList = make([]SnapID, cLen)
+		ret = C.rados_ioctx_snap_list(
+			ioctx.ioctx,
+			(*C.rados_snap_t)(unsafe.Pointer(&snapList[0])),
+			cLen)
+		err = getErrorIfNegative(ret)
+		return retry.Size(int(cLen)).If(err == errRange)
+	})
+
+	if err != nil {
+		return nil, err
+	}
+	return snapList[:ret], nil
+}
+
+// RollbackSnap rollbacks the object with key oID to the pool snapshot.
+// The contents of the object will be the same as when the snapshot was taken.
+//
+// Implements:
+//  int rados_ioctx_snap_rollback(rados_ioctx_t io, const char *oid, const char *snapname);
+func (ioctx *IOContext) RollbackSnap(oid, snapName string) error {
+	if err := ioctx.validate(); err != nil {
+		return err
+	}
+
+	coid := C.CString(oid)
+	defer C.free(unsafe.Pointer(coid))
+	cSnapName := C.CString(snapName)
+	defer C.free(unsafe.Pointer(cSnapName))
+
+	ret := C.rados_ioctx_snap_rollback(ioctx.ioctx, coid, cSnapName)
+	return getError(ret)
+}
+
+// SnapHead is the representation of LIBRADOS_SNAP_HEAD from librados.
+// SnapHead can be used to reset the IOContext to stop reading from a snapshot.
+const SnapHead = SnapID(C.LIBRADOS_SNAP_HEAD)
+
+// SetReadSnap sets the snapshot from which reads are performed.
+// Subsequent reads will return data as it was at the time of that snapshot.
+// Pass SnapHead for no snapshot (i.e. normal operation).
+//
+// Implements:
+//  void rados_ioctx_snap_set_read(rados_ioctx_t io, rados_snap_t snap);
+func (ioctx *IOContext) SetReadSnap(snapID SnapID) error {
+	if err := ioctx.validate(); err != nil {
+		return err
+	}
+
+	C.rados_ioctx_snap_set_read(ioctx.ioctx, (C.rados_snap_t)(snapID))
+	return nil
+}

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
-
-// revive:enable:exported
-
-func (e RBDError) Error() string {
-	errno, s := errutil.FormatErrno(int(e))
-	if s == "" {
-		return fmt.Sprintf("rbd: ret=%d", errno)
+func (e rbdError) Error() string {
+	return errutil.FormatErrorCode("rbd", int(e))
 }
-	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)
+}

vendor/modules.txt

@@ -2,11 +2,12 @@
 github.com/beorn7/perks/quantile
 # github.com/blang/semver v3.5.0+incompatible
 github.com/blang/semver
-# github.com/ceph/go-ceph v0.4.0
+# github.com/ceph/go-ceph v0.5.0
 github.com/ceph/go-ceph/internal/callbacks
 github.com/ceph/go-ceph/internal/cutil
 github.com/ceph/go-ceph/internal/errutil
 github.com/ceph/go-ceph/internal/retry
+github.com/ceph/go-ceph/internal/timespec
 github.com/ceph/go-ceph/rados
 github.com/ceph/go-ceph/rbd
 # github.com/cespare/xxhash/v2 v2.1.1