From 04841ff69ded80414ade4929069d02fdd237bcfe Mon Sep 17 00:00:00 2001
From: Tim Serong <tserong@suse.com>
Date: Thu, 7 Mar 2024 19:10:54 +1100
Subject: [PATCH 1/4] scripts/validate: Fix `git rev-parse` when doing local
 builds

When doing local builds (i.e. without $DRONE_REPO and $DRONE_PULL_REQUEST,
or $DRONE_COMMIT_REF set), the build fails with "fatal: Needed a single
revision" in `scripts/validate`:

```
> make REPO=tserong
[...]
Running validation
Running: go vet
refs/heads/wip-add-virtualSize
fatal: Needed a single revision
FATA[0032] exit status 128
make: *** [Makefile:11: ci] Error 1
```

If I run the commands in `scripts/validate` by hand, I see this:

```
> git symbolic-ref -q HEAD && REV="origin/HEAD" || REV="HEAD^"
refs/heads/wip-add-virtualSize
> echo $REV
origin/HEAD
> headSHA=$(git rev-parse --short=12 ${REV})
fatal: Needed a single revision
```

I don't know if this is just something weird about my environment, but
if I change "origin/HEAD" to "HEAD", it works fine:

```
> headSHA=$(git rev-parse --short=12 HEAD)
> echo $headSHA
eb27fbf6e678
```

Signed-off-by: Tim Serong <tserong@suse.com>
---
 scripts/validate | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/scripts/validate b/scripts/validate
index e183835743..6ee550bd30 100755
--- a/scripts/validate
+++ b/scripts/validate
@@ -22,7 +22,7 @@ elif [ ! -z "${DRONE_COMMIT_REF}" ]; then
 	echo "Running: golangci-lint run --new-from-rev=${DRONE_COMMIT_REF}"
 	golangci-lint run --new-from-rev=${DRONE_COMMIT_REF}
 else
-	git symbolic-ref -q HEAD && REV="origin/HEAD" || REV="HEAD^"
+	git symbolic-ref -q HEAD && REV="HEAD" || REV="HEAD^"
 	headSHA=$(git rev-parse --short=12 ${REV})
 	echo "Running: golangci-lint run --new-from-rev=${headSHA}"
 	golangci-lint run --new-from-rev=${headSHA}

From 52825e02a2c9355047c45d61371a26ad4378f5fd Mon Sep 17 00:00:00 2001
From: Tim Serong <tserong@suse.com>
Date: Wed, 27 Mar 2024 16:27:29 +1100
Subject: [PATCH 2/4] vendor: Update longhorn/backing-image-manager to get
 VirtualSize

Signed-off-by: Tim Serong <tserong@suse.com>
---
 go.mod                                        |   4 +-
 go.sum                                        |   4 +
 .../RoaringBitmap/roaring/README.md           |   2 +-
 .../RoaringBitmap/roaring/arraycontainer.go   |  52 ++-
 .../RoaringBitmap/roaring/runcontainer.go     |   1 +
 .../backing-image-manager/api/types.go        |   3 +
 .../backing-image-manager/pkg/rpc/rpc.pb.go   | 438 +++++++++---------
 .../backing-image-manager/pkg/rpc/rpc.proto   |   1 +
 .../backing-image-manager/pkg/util/util.go    |  79 ++--
 vendor/modules.txt                            |   4 +-
 10 files changed, 331 insertions(+), 257 deletions(-)

diff --git a/go.mod b/go.mod
index 00cf3c5ed5..6ea6c01a38 100644
--- a/go.mod
+++ b/go.mod
@@ -44,7 +44,7 @@ require (
 	github.com/gorilla/websocket v1.5.1
 	github.com/jinzhu/copier v0.3.5
 	github.com/kubernetes-csi/csi-lib-utils v0.6.1
-	github.com/longhorn/backing-image-manager v1.6.0
+	github.com/longhorn/backing-image-manager v1.7.0-dev.0.20240326182459-c5288d745f4a
 	github.com/longhorn/backupstore v0.0.0-20240219094812-3a87ee02df77
 	github.com/longhorn/go-common-libs v0.0.0-20240319112414-b75404dc7fbc
 	github.com/longhorn/go-iscsi-helper v0.0.0-20240308033847-bc3aab599425
@@ -104,7 +104,7 @@ require (
 require (
 	github.com/Microsoft/go-winio v0.6.1 // indirect
 	github.com/NYTimes/gziphandler v1.1.1 // indirect
-	github.com/RoaringBitmap/roaring v1.9.0 // indirect
+	github.com/RoaringBitmap/roaring v1.9.1 // indirect
 	github.com/asaskevich/govalidator v0.0.0-20190424111038-f61b66f89f4a // indirect
 	github.com/avast/retry-go v3.0.0+incompatible
 	github.com/beorn7/perks v1.0.1 // indirect
diff --git a/go.sum b/go.sum
index b3f91f24d3..ecb997abf0 100644
--- a/go.sum
+++ b/go.sum
@@ -614,6 +614,8 @@ github.com/NYTimes/gziphandler v1.1.1/go.mod h1:n/CVRwUEOgIxrgPvAQhUUr9oeUtvrhMo
 github.com/OneOfOne/xxhash v1.2.2/go.mod h1:HSdplMjZKSmBqAxg5vPj2TmRDmfkzw+cTzAElWljhcU=
 github.com/RoaringBitmap/roaring v1.9.0 h1:lwKhr90/j0jVXJyh5X+vQN1VVn77rQFfYnh6RDRGCcE=
 github.com/RoaringBitmap/roaring v1.9.0/go.mod h1:6AXUsoIEzDTFFQCe1RbGA6uFONMhvejWj5rqITANK90=
+github.com/RoaringBitmap/roaring v1.9.1 h1:LXcSqGGGMKm+KAzUyWn7ZeREqoOkoMX+KwLOK1thc4I=
+github.com/RoaringBitmap/roaring v1.9.1/go.mod h1:6AXUsoIEzDTFFQCe1RbGA6uFONMhvejWj5rqITANK90=
 github.com/ajstarks/deck v0.0.0-20200831202436-30c9fc6549a9/go.mod h1:JynElWSGnm/4RlzPXRlREEwqTHAN3T56Bv2ITsFT3gY=
 github.com/ajstarks/deck/generate v0.0.0-20210309230005-c3f852c02e19/go.mod h1:T13YZdzov6OU0A1+RfKZiZN9ca6VeKdBdyDV+BY97Tk=
 github.com/ajstarks/svgo v0.0.0-20180226025133-644b8db467af/go.mod h1:K08gAheRH3/J6wwsYMMT4xOr94bZjxIelGM0+d/wbFw=
@@ -1045,6 +1047,8 @@ github.com/liggitt/tabwriter v0.0.0-20181228230101-89fcab3d43de h1:9TO3cAIGXtEhn
 github.com/liggitt/tabwriter v0.0.0-20181228230101-89fcab3d43de/go.mod h1:zAbeS9B/r2mtpb6U+EI2rYA5OAXxsYw6wTamcNW+zcE=
 github.com/longhorn/backing-image-manager v1.6.0 h1:Jmlc8+W63l0VZoVhPwNLniAk+eBC4CNaadoqpqA51KE=
 github.com/longhorn/backing-image-manager v1.6.0/go.mod h1:IH0mgbK+Dr13xkY+LhDaufyd9YIpiKqYo1AeRLFYGrk=
+github.com/longhorn/backing-image-manager v1.7.0-dev.0.20240326182459-c5288d745f4a h1:Z/vdszQazSZJ51IlJvtEuDViNn6AShJx6xGcOwwa9Ho=
+github.com/longhorn/backing-image-manager v1.7.0-dev.0.20240326182459-c5288d745f4a/go.mod h1:LuPH4YQ7+phuzSXEPT8b1/iBUsOvmnsCaogU4EImy+k=
 github.com/longhorn/backupstore v0.0.0-20240219094812-3a87ee02df77 h1:iJRq59kA22f9HIjFtY/lz5rKCorZJrrYXju70XoWdmE=
 github.com/longhorn/backupstore v0.0.0-20240219094812-3a87ee02df77/go.mod h1:4cbJWtlrD2cGTQxQLtdlPTYopiJiusXH7CpOBrn/s3k=
 github.com/longhorn/go-common-libs v0.0.0-20240319112414-b75404dc7fbc h1:Eh9Npc5yBcVD8E4zVQIGUtC62HcfqevrHjQ2kh7fJ/E=
diff --git a/vendor/github.com/RoaringBitmap/roaring/README.md b/vendor/github.com/RoaringBitmap/roaring/README.md
index 8c780afd6e..acd3058b77 100644
--- a/vendor/github.com/RoaringBitmap/roaring/README.md
+++ b/vendor/github.com/RoaringBitmap/roaring/README.md
@@ -43,7 +43,7 @@ The ``roaring`` Go library is used by
 * [M3](https://github.com/m3db/m3)
 * [trident](https://github.com/NetApp/trident)
 * [Husky](https://www.datadoghq.com/blog/engineering/introducing-husky/)
-
+* [FrostDB](https://github.com/polarsignals/frostdb)
 
 This library is used in production in several systems, it is part of the [Awesome Go collection](https://awesome-go.com).
 
diff --git a/vendor/github.com/RoaringBitmap/roaring/arraycontainer.go b/vendor/github.com/RoaringBitmap/roaring/arraycontainer.go
index a575caff83..80fa676ef6 100644
--- a/vendor/github.com/RoaringBitmap/roaring/arraycontainer.go
+++ b/vendor/github.com/RoaringBitmap/roaring/arraycontainer.go
@@ -664,10 +664,54 @@ func (ac *arrayContainer) iandNot(a container) container {
 }
 
 func (ac *arrayContainer) iandNotRun16(rc *runContainer16) container {
-	rcb := rc.toBitmapContainer()
-	acb := ac.toBitmapContainer()
-	acb.iandNotBitmapSurely(rcb)
-	*ac = *(acb.toArrayContainer())
+	// Fast path: if either the array container or the run container is empty, the result is the array.
+	if ac.isEmpty() || rc.isEmpty() {
+		// Empty
+		return ac
+	}
+	// Fast path: if the run container is full, the result is empty.
+	if rc.isFull() {
+		ac.content = ac.content[:0]
+		return ac
+	}
+	current_run := 0
+	// All values in [start_run, end_end] are part of the run
+	start_run := rc.iv[current_run].start
+	end_end := start_run + rc.iv[current_run].length
+	// We are going to read values in the array at index i, and we are
+	// going to write them at index pos. So we do in-place processing.
+	// We always have that pos <= i by construction. So we can either
+	// overwrite a value just read, or a value that was previous read.
+	pos := 0
+	i := 0
+	for ; i < len(ac.content); i++ {
+		if ac.content[i] < start_run {
+			// the value in the array appears before the run [start_run, end_end]
+			ac.content[pos] = ac.content[i]
+			pos++
+		} else if ac.content[i] <= end_end {
+			// nothing to do, the value is in the array but also in the run.
+		} else {
+			// We have the value in the array after the run. We cannot tell
+			// whether we need to keep it or not. So let us move to another run.
+			if current_run+1 < len(rc.iv) {
+				current_run++
+				start_run = rc.iv[current_run].start
+				end_end = start_run + rc.iv[current_run].length
+				i-- // retry with the same i
+			} else {
+				// We have exhausted the number of runs. We can keep the rest of the values
+				// from i to len(ac.content) - 1 inclusively.
+				break // We are done, the rest of the array will be kept
+			}
+		}
+	}
+	for ; i < len(ac.content); i++ {
+		ac.content[pos] = ac.content[i]
+		pos++
+	}
+	// We 'shink' the slice.
+	ac.content = ac.content[:pos]
 	return ac
 }
 
diff --git a/vendor/github.com/RoaringBitmap/roaring/runcontainer.go b/vendor/github.com/RoaringBitmap/roaring/runcontainer.go
index f4829a62d0..7098ba28fc 100644
--- a/vendor/github.com/RoaringBitmap/roaring/runcontainer.go
+++ b/vendor/github.com/RoaringBitmap/roaring/runcontainer.go
@@ -47,6 +47,7 @@ import (
 // runContainer16 does run-length encoding of sets of
 // uint16 integers.
 type runContainer16 struct {
+	// iv is a slice of sorted, non-overlapping, non-adjacent intervals.
 	iv []interval16
 }
 
diff --git a/vendor/github.com/longhorn/backing-image-manager/api/types.go b/vendor/github.com/longhorn/backing-image-manager/api/types.go
index 5446553fcb..905316ad30 100644
--- a/vendor/github.com/longhorn/backing-image-manager/api/types.go
+++ b/vendor/github.com/longhorn/backing-image-manager/api/types.go
@@ -13,6 +13,7 @@ type BackingImage struct {
 	Name             string `json:"name"`
 	UUID             string `json:"uuid"`
 	Size             int64  `json:"size"`
+	VirtualSize      int64  `json:"virtualSize"`
 	ExpectedChecksum string `json:"expectedChecksum"`
 
 	Status BackingImageStatus `json:"status"`
@@ -32,6 +33,7 @@ func RPCToBackingImage(obj *rpc.BackingImageResponse) *BackingImage {
 		Name:             obj.Spec.Name,
 		UUID:             obj.Spec.Uuid,
 		Size:             obj.Spec.Size,
+		VirtualSize:      obj.Spec.VirtualSize,
 		ExpectedChecksum: obj.Spec.Checksum,
 
 		Status: BackingImageStatus{
@@ -112,6 +114,7 @@ type FileInfo struct {
 	FilePath         string `json:"filePath"`
 	UUID             string `json:"uuid"`
 	Size             int64  `json:"size"`
+	VirtualSize      int64  `json:"virtualSize"`
 	State            string `json:"state"`
 	Progress         int    `json:"progress"`
 	ProcessedSize    int64  `json:"processedSize"`
diff --git a/vendor/github.com/longhorn/backing-image-manager/pkg/rpc/rpc.pb.go b/vendor/github.com/longhorn/backing-image-manager/pkg/rpc/rpc.pb.go
index b3012f6207..c237c6c84d 100644
--- a/vendor/github.com/longhorn/backing-image-manager/pkg/rpc/rpc.pb.go
+++ b/vendor/github.com/longhorn/backing-image-manager/pkg/rpc/rpc.pb.go
@@ -1,7 +1,7 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
 // 	protoc-gen-go v1.26.0
-// 	protoc        v4.24.3
+// 	protoc        v4.25.1
 // source: github.com/longhorn/backing-image-manager/pkg/rpc/rpc.proto
 
 package rpc
@@ -30,10 +30,11 @@ type BackingImageSpec struct {
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
-	Name     string `protobuf:"bytes,1,opt,name=name,proto3" json:"name,omitempty"`
-	Uuid     string `protobuf:"bytes,2,opt,name=uuid,proto3" json:"uuid,omitempty"`
-	Size     int64  `protobuf:"varint,3,opt,name=size,proto3" json:"size,omitempty"`
-	Checksum string `protobuf:"bytes,4,opt,name=checksum,proto3" json:"checksum,omitempty"`
+	Name        string `protobuf:"bytes,1,opt,name=name,proto3" json:"name,omitempty"`
+	Uuid        string `protobuf:"bytes,2,opt,name=uuid,proto3" json:"uuid,omitempty"`
+	Size        int64  `protobuf:"varint,3,opt,name=size,proto3" json:"size,omitempty"`
+	Checksum    string `protobuf:"bytes,4,opt,name=checksum,proto3" json:"checksum,omitempty"`
+	VirtualSize int64  `protobuf:"varint,5,opt,name=virtualSize,proto3" json:"virtualSize,omitempty"`
 }
 
 func (x *BackingImageSpec) Reset() {
@@ -96,6 +97,13 @@ func (x *BackingImageSpec) GetChecksum() string {
 	return ""
 }
 
+func (x *BackingImageSpec) GetVirtualSize() int64 {
+	if x != nil {
+		return x.VirtualSize
+	}
+	return 0
+}
+
 type BackingImageStatus struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -989,225 +997,227 @@ var file_github_com_longhorn_backing_image_manager_pkg_rpc_rpc_proto_rawDesc = [
 	0x6d, 0x61, 0x67, 0x65, 0x6d, 0x61, 0x6e, 0x61, 0x67, 0x65, 0x72, 0x2e, 0x70, 0x6b, 0x67, 0x2e,
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+	0x68, 0x75, 0x62, 0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x6c, 0x6f, 0x6e, 0x67, 0x68, 0x6f, 0x72, 0x6e,
+	0x2f, 0x62, 0x61, 0x63, 0x6b, 0x69, 0x6e, 0x67, 0x2d, 0x69, 0x6d, 0x61, 0x67, 0x65, 0x2d, 0x6d,
+	0x61, 0x6e, 0x61, 0x67, 0x65, 0x72, 0x2f, 0x70, 0x6b, 0x67, 0x2f, 0x72, 0x70, 0x63, 0x62, 0x06,
+	0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
 }
 
 var (
diff --git a/vendor/github.com/longhorn/backing-image-manager/pkg/rpc/rpc.proto b/vendor/github.com/longhorn/backing-image-manager/pkg/rpc/rpc.proto
index 9dbf137bf5..10ed98abfb 100644
--- a/vendor/github.com/longhorn/backing-image-manager/pkg/rpc/rpc.proto
+++ b/vendor/github.com/longhorn/backing-image-manager/pkg/rpc/rpc.proto
@@ -26,6 +26,7 @@ message BackingImageSpec {
 	string uuid = 2;
 	int64 size = 3;
 	string checksum = 4;
+	int64 virtualSize = 5;
 }
 
 message BackingImageStatus {
diff --git a/vendor/github.com/longhorn/backing-image-manager/pkg/util/util.go b/vendor/github.com/longhorn/backing-image-manager/pkg/util/util.go
index f46bc5e36e..30cff9df51 100644
--- a/vendor/github.com/longhorn/backing-image-manager/pkg/util/util.go
+++ b/vendor/github.com/longhorn/backing-image-manager/pkg/util/util.go
@@ -1,7 +1,6 @@
 package util
 
 import (
-	"bufio"
 	"bytes"
 	"compress/gzip"
 	"context"
@@ -15,7 +14,6 @@ import (
 	"os/exec"
 	"path/filepath"
 	"regexp"
-	"strings"
 	"time"
 
 	"github.com/pkg/errors"
@@ -152,6 +150,7 @@ type SyncingFileConfig struct {
 	FilePath         string `json:"name"`
 	UUID             string `json:"uuid"`
 	Size             int64  `json:"size"`
+	VirtualSize      int64  `json:"virtualSize"`
 	ExpectedChecksum string `json:"expectedChecksum"`
 	CurrentChecksum  string `json:"currentChecksum"`
 	ModificationTime string `json:"modificationTime"`
@@ -232,48 +231,60 @@ func ExecuteWithTimeout(timeout time.Duration, envs []string, binary string, arg
 	return output.String(), nil
 }
 
-func DetectFileFormat(filePath string) (string, error) {
+type QemuImgInfo struct {
+	// For qcow2 files, VirtualSize may be larger than the physical
+	// image size on disk.  For raw files, `qemu-img info` will report
+	// VirtualSize as being the same as the physical file size.
+	VirtualSize int64  `json:"virtual-size"`
+	Format      string `json:"format"`
+}
+
+func GetQemuImgInfo(filePath string) (imgInfo QemuImgInfo, err error) {
 
 	/* Example command outputs
-	   $ qemu-img info parrot.raw
-	   image: parrot.raw
-	   file format: raw
-	   virtual size: 32M (33554432 bytes)
-	   disk size: 2.2M
-
-	   $ qemu-img info parrot.qcow2
-	   image: parrot.qcow2
-	   file format: qcow2
-	   virtual size: 32M (33554432 bytes)
-	   disk size: 2.3M
-	   cluster_size: 65536
-	   Format specific information:
-	       compat: 1.1
-	       lazy refcounts: false
-	       refcount bits: 16
-	       corrupt: false
+	   $ qemu-img info --output=json SLE-Micro.x86_64-5.5.0-Default-qcow-GM.qcow2
+	   {
+	       "virtual-size": 21474836480,
+	       "filename": "SLE-Micro.x86_64-5.5.0-Default-qcow-GM.qcow2",
+	       "cluster-size": 65536,
+	       "format": "qcow2",
+	       "actual-size": 1001656320,
+	       "format-specific": {
+	           "type": "qcow2",
+	           "data": {
+	               "compat": "1.1",
+	               "compression-type": "zlib",
+	               "lazy-refcounts": false,
+	               "refcount-bits": 16,
+	               "corrupt": false,
+	               "extended-l2": false
+	           }
+	       },
+	       "dirty-flag": false
+	   }
+
+	   $ qemu-img info --output=json SLE-15-SP5-Full-x86_64-GM-Media1.iso
+	   {
+	       "virtual-size": 14548992000,
+	       "filename": "SLE-15-SP5-Full-x86_64-GM-Media1.iso",
+	       "format": "raw",
+	       "actual-size": 14548996096,
+	       "dirty-flag": false
+	   }
 	*/
 
-	output, err := Execute([]string{}, QemuImgBinary, "info", filePath)
+	output, err := Execute([]string{}, QemuImgBinary, "info", "--output=json", filePath)
 	if err != nil {
-		return "", err
+		return
 	}
-
-	scanner := bufio.NewScanner(strings.NewReader(output))
-	for scanner.Scan() {
-		line := strings.TrimSpace(scanner.Text())
-		if strings.HasPrefix(line, "file format: ") {
-			return strings.TrimPrefix(line, "file format: "), nil
-		}
-	}
-
-	return "", fmt.Errorf("cannot find the file format in the output %s", output)
+	err = json.Unmarshal([]byte(output), &imgInfo)
+	return
 }
 
 func ConvertFromRawToQcow2(filePath string) error {
-	if format, err := DetectFileFormat(filePath); err != nil {
+	if imgInfo, err := GetQemuImgInfo(filePath); err != nil {
 		return err
-	} else if format == "qcow2" {
+	} else if imgInfo.Format == "qcow2" {
 		return nil
 	}
 
diff --git a/vendor/modules.txt b/vendor/modules.txt
index 3b2572e777..51f509b493 100644
--- a/vendor/modules.txt
+++ b/vendor/modules.txt
@@ -8,7 +8,7 @@ github.com/Microsoft/go-winio/pkg/guid
 # github.com/NYTimes/gziphandler v1.1.1
 ## explicit; go 1.11
 github.com/NYTimes/gziphandler
-# github.com/RoaringBitmap/roaring v1.9.0
+# github.com/RoaringBitmap/roaring v1.9.1
 ## explicit; go 1.14
 github.com/RoaringBitmap/roaring
 github.com/RoaringBitmap/roaring/internal
@@ -224,7 +224,7 @@ github.com/kubernetes-csi/csi-lib-utils/protosanitizer
 # github.com/liggitt/tabwriter v0.0.0-20181228230101-89fcab3d43de
 ## explicit
 github.com/liggitt/tabwriter
-# github.com/longhorn/backing-image-manager v1.6.0
+# github.com/longhorn/backing-image-manager v1.7.0-dev.0.20240326182459-c5288d745f4a
 ## explicit; go 1.21
 github.com/longhorn/backing-image-manager/api
 github.com/longhorn/backing-image-manager/pkg/client

From 25dcb89d02da65b59983fdae80ff9e697b5c7a85 Mon Sep 17 00:00:00 2001
From: Tim Serong <tserong@suse.com>
Date: Fri, 23 Feb 2024 19:52:05 +1100
Subject: [PATCH 3/4] Expose virtual size of backing images

This commit adds virtualSize to the BackingImageStatus and
BackingImageFileInfo structs, and thus to the BackingImage and
BackingImageManager CRDs.  We can see how this works in practice by
creating a new backing image downloaded from a URL, then periodically
running `kubectl -n longhorn-system get lhbi`.  I'm using
https://download.opensuse.org/distribution/leap/15.5/appliances/openSUSE-Leap-15.5-Minimal-VM.x86_64-Cloud.qcow2
in the example below.

Initially, when the download is just started, before the file size is known:

```
> kubectl -n longhorn-system get lhbi/default-image-7mplj
NAME                  UUID       SOURCETYPE   SIZE        VIRTUALSIZE   AGE
default-image-7mplj   6d5a98b0   download     0           0             9s
```

A little later, while the download is running:

```
> kubectl -n longhorn-system get lhbi/default-image-7mplj
NAME                  UUID       SOURCETYPE   SIZE        VIRTUALSIZE   AGE
default-image-7mplj   6d5a98b0   download     255701504   0             3m33s
```

Finally, once the download is complete:

```
> kubectl -n longhorn-system get lhbi/default-image-7mplj
NAME                  UUID       SOURCETYPE   SIZE        VIRTUALSIZE   AGE
default-image-7mplj   6d5a98b0   download     255701504   821035008     4m26s
```

Compare size and virtualSize above with the image downloaded manually:

```
> wget https://download.opensuse.org/distribution/leap/15.5/appliances/openSUSE-Leap-15.5-Minimal-VM.x86_64-Cloud.qcow2
[...]

> ls -l openSUSE-Leap-15.5-Minimal-VM.x86_64-Cloud.qcow2
-rw-r--r-- 1 tserong users 255701504 Dec 19 23:26 openSUSE-Leap-15.5-Minimal-VM.x86_64-Cloud.qcow2

> qemu-img info openSUSE-Leap-15.5-Minimal-VM.x86_64-Cloud.qcow2 | grep virtual
virtual size: 783 MiB (821035008 bytes)
```

Related issue: https://github.com/longhorn/longhorn/issues/7923

Signed-off-by: Tim Serong <tserong@suse.com>
---
 controller/backing_image_controller.go               | 10 ++++++++++
 engineapi/backing_image_manager.go                   |  7 ++++---
 k8s/crds.yaml                                        | 11 +++++++++++
 k8s/pkg/apis/longhorn/v1beta2/backingimage.go        |  4 ++++
 k8s/pkg/apis/longhorn/v1beta2/backingimagemanager.go |  2 ++
 5 files changed, 31 insertions(+), 3 deletions(-)

diff --git a/controller/backing_image_controller.go b/controller/backing_image_controller.go
index 09bda997d3..62f939d337 100644
--- a/controller/backing_image_controller.go
+++ b/controller/backing_image_controller.go
@@ -666,6 +666,16 @@ func (bic *BackingImageController) syncBackingImageFileInfo(bi *longhorn.Backing
 				return fmt.Errorf("found mismatching size %v reported by backing image manager %v in disk %v, the size recorded in status is %v", info.Size, bim.Name, bim.Spec.DiskUUID, bi.Status.Size)
 			}
 		}
+		if info.VirtualSize > 0 {
+			if bi.Status.VirtualSize == 0 {
+				bi.Status.VirtualSize = info.VirtualSize
+				bic.eventRecorder.Eventf(bi, corev1.EventTypeNormal, constant.EventReasonUpdate, "Set virtualSize to %v", bi.Status.VirtualSize)
+			}
+			if bi.Status.VirtualSize != info.VirtualSize {
+				return fmt.Errorf("found mismatching virtualSize %v reported by backing image manager %v in disk %v, the virtualSize recorded in status is %v",
+					info.VirtualSize, bim.Name, bim.Spec.DiskUUID, bi.Status.VirtualSize)
+			}
+		}
 	}
 
 	for diskUUID := range bi.Status.DiskFileStatusMap {
diff --git a/engineapi/backing_image_manager.go b/engineapi/backing_image_manager.go
index 3b7701788c..539a3b93b0 100644
--- a/engineapi/backing_image_manager.go
+++ b/engineapi/backing_image_manager.go
@@ -54,9 +54,10 @@ func (c *BackingImageManagerClient) parseBackingImageFileInfo(bi *bimapi.Backing
 		return nil
 	}
 	return &longhorn.BackingImageFileInfo{
-		Name: bi.Name,
-		UUID: bi.UUID,
-		Size: bi.Size,
+		Name:        bi.Name,
+		UUID:        bi.UUID,
+		Size:        bi.Size,
+		VirtualSize: bi.VirtualSize,
 
 		State:                longhorn.BackingImageState(bi.Status.State),
 		CurrentChecksum:      bi.Status.CurrentChecksum,
diff --git a/k8s/crds.yaml b/k8s/crds.yaml
index 64851fe1bb..c11ff6ab26 100644
--- a/k8s/crds.yaml
+++ b/k8s/crds.yaml
@@ -315,6 +315,9 @@ spec:
                       type: string
                     uuid:
                       type: string
+                    virtualSize:
+                      format: int64
+                      type: integer
                   type: object
                 nullable: true
                 type: object
@@ -413,6 +416,10 @@ spec:
       jsonPath: .status.size
       name: Size
       type: string
+    - description: The virtual size of the image (may be larger than file size)
+      jsonPath: .status.virtualSize
+      name: VirtualSize
+      type: string
     - jsonPath: .metadata.creationTimestamp
       name: Age
       type: date
@@ -481,6 +488,10 @@ spec:
                 type: integer
               uuid:
                 type: string
+              virtualSize:
+                description: Virtual size of image, which may be larger than physical size. Will be zero until known (e.g. while a backing image is uploading)
+                format: int64
+                type: integer
             type: object
         type: object
     served: true
diff --git a/k8s/pkg/apis/longhorn/v1beta2/backingimage.go b/k8s/pkg/apis/longhorn/v1beta2/backingimage.go
index 15cf0c12a3..a68fc3e2d4 100644
--- a/k8s/pkg/apis/longhorn/v1beta2/backingimage.go
+++ b/k8s/pkg/apis/longhorn/v1beta2/backingimage.go
@@ -56,6 +56,9 @@ type BackingImageStatus struct {
 	UUID string `json:"uuid"`
 	// +optional
 	Size int64 `json:"size"`
+	// Virtual size of image, which may be larger than physical size. Will be zero until known (e.g. while a backing image is uploading)
+	// +optional
+	VirtualSize int64 `json:"virtualSize"`
 	// +optional
 	Checksum string `json:"checksum"`
 	// +optional
@@ -74,6 +77,7 @@ type BackingImageStatus struct {
 // +kubebuilder:printcolumn:name="UUID",type=string,JSONPath=`.status.uuid`,description="The system generated UUID"
 // +kubebuilder:printcolumn:name="SourceType",type=string,JSONPath=`.spec.sourceType`,description="The source of the backing image file data"
 // +kubebuilder:printcolumn:name="Size",type=string,JSONPath=`.status.size`,description="The backing image file size in each disk"
+// +kubebuilder:printcolumn:name="VirtualSize",type=string,JSONPath=`.status.virtualSize`,description="The virtual size of the image (may be larger than file size)"
 // +kubebuilder:printcolumn:name="Age",type=date,JSONPath=`.metadata.creationTimestamp`
 
 // BackingImage is where Longhorn stores backing image object.
diff --git a/k8s/pkg/apis/longhorn/v1beta2/backingimagemanager.go b/k8s/pkg/apis/longhorn/v1beta2/backingimagemanager.go
index a7dfa00073..303b2f81ae 100644
--- a/k8s/pkg/apis/longhorn/v1beta2/backingimagemanager.go
+++ b/k8s/pkg/apis/longhorn/v1beta2/backingimagemanager.go
@@ -20,6 +20,8 @@ type BackingImageFileInfo struct {
 	// +optional
 	Size int64 `json:"size"`
 	// +optional
+	VirtualSize int64 `json:"virtualSize"`
+	// +optional
 	State BackingImageState `json:"state"`
 	// +optional
 	CurrentChecksum string `json:"currentChecksum"`

From 0db8e671f3fe171bd0ae89a0f332f9b88f239b80 Mon Sep 17 00:00:00 2001
From: Tim Serong <tserong@suse.com>
Date: Thu, 28 Mar 2024 17:21:27 +1100
Subject: [PATCH 4/4] Set backing image state to failed in case of size or
 virtualSize mismatch

Doing this means if there's somehow a mismatch between backing image
size or virtual size reported by backing image manager vs. what's currently
in the backing image resource's status, the error will be made visible in
status.diskFileStatusMap.$DISKUUID.message, i.e. the user should be able
to can see the problem by running `kubectl -n longhorn-system get lhbi -o
yaml`.  This is the same logic as is already used in
updateStatusWithFileInfo().

The one thing I'm struggling with here is how to inject such a failure
into a running system in order to prove that this change works correctly.

Signed-off-by: Tim Serong <tserong@suse.com>
---
 controller/backing_image_controller.go | 17 ++++++++++++++---
 1 file changed, 14 insertions(+), 3 deletions(-)

diff --git a/controller/backing_image_controller.go b/controller/backing_image_controller.go
index 62f939d337..d2c37635ee 100644
--- a/controller/backing_image_controller.go
+++ b/controller/backing_image_controller.go
@@ -663,7 +663,13 @@ func (bic *BackingImageController) syncBackingImageFileInfo(bi *longhorn.Backing
 				bic.eventRecorder.Eventf(bi, corev1.EventTypeNormal, constant.EventReasonUpdate, "Set size to %v", bi.Status.Size)
 			}
 			if bi.Status.Size != info.Size {
-				return fmt.Errorf("found mismatching size %v reported by backing image manager %v in disk %v, the size recorded in status is %v", info.Size, bim.Name, bim.Spec.DiskUUID, bi.Status.Size)
+				if bi.Status.DiskFileStatusMap[bim.Spec.DiskUUID].State != longhorn.BackingImageStateFailed {
+					msg := fmt.Sprintf("found mismatching size %v reported by backing image manager %v in disk %v, the size recorded in status is %v",
+						info.Size, bim.Name, bim.Spec.DiskUUID, bi.Status.Size)
+					log.Error(msg)
+					bi.Status.DiskFileStatusMap[bim.Spec.DiskUUID].State = longhorn.BackingImageStateFailed
+					bi.Status.DiskFileStatusMap[bim.Spec.DiskUUID].Message = msg
+				}
 			}
 		}
 		if info.VirtualSize > 0 {
@@ -672,8 +678,13 @@ func (bic *BackingImageController) syncBackingImageFileInfo(bi *longhorn.Backing
 				bic.eventRecorder.Eventf(bi, corev1.EventTypeNormal, constant.EventReasonUpdate, "Set virtualSize to %v", bi.Status.VirtualSize)
 			}
 			if bi.Status.VirtualSize != info.VirtualSize {
-				return fmt.Errorf("found mismatching virtualSize %v reported by backing image manager %v in disk %v, the virtualSize recorded in status is %v",
-					info.VirtualSize, bim.Name, bim.Spec.DiskUUID, bi.Status.VirtualSize)
+				if bi.Status.DiskFileStatusMap[bim.Spec.DiskUUID].State != longhorn.BackingImageStateFailed {
+					msg := fmt.Sprintf("found mismatching virtualSize %v reported by backing image manager %v in disk %v, the virtualSize recorded in status is %v",
+						info.VirtualSize, bim.Name, bim.Spec.DiskUUID, bi.Status.VirtualSize)
+					log.Error(msg)
+					bi.Status.DiskFileStatusMap[bim.Spec.DiskUUID].State = longhorn.BackingImageStateFailed
+					bi.Status.DiskFileStatusMap[bim.Spec.DiskUUID].Message = msg
+				}
 			}
 		}
 	}