From 7ee783e90c44ccaa34953be15e62b9209120e868 Mon Sep 17 00:00:00 2001
From: Tonis Tiigi <tonistiigi@gmail.com>
Date: Tue, 30 Nov 2021 17:20:47 -0800
Subject: [PATCH 1/6] add source mapping support to warnings

Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>
---
 api/services/control/control.pb.go    | 310 ++++++++++++++------
 api/services/control/control.proto    |   2 +
 client/build_test.go                  |  20 +-
 client/graph.go                       |   9 +-
 client/solve.go                       |   8 +-
 control/control.go                    |   2 +
 frontend/frontend.go                  |   4 +-
 frontend/gateway/client/client.go     |   8 +-
 frontend/gateway/forwarder/forward.go |   4 +-
 frontend/gateway/gateway.go           |   6 +-
 frontend/gateway/grpcclient/client.go |   6 +-
 frontend/gateway/pb/gateway.pb.go     | 394 +++++++++++++++++---------
 frontend/gateway/pb/gateway.proto     |   3 +
 solver/llbsolver/bridge.go            |  14 +-
 14 files changed, 543 insertions(+), 247 deletions(-)

diff --git a/api/services/control/control.pb.go b/api/services/control/control.pb.go
index 6eb5b49f9472..2e099606a7f8 100644
--- a/api/services/control/control.pb.go
+++ b/api/services/control/control.pb.go
@@ -1007,6 +1007,8 @@ type VertexWarning struct {
 	Vertex               github_com_opencontainers_go_digest.Digest `protobuf:"bytes,1,opt,name=vertex,proto3,customtype=github.com/opencontainers/go-digest.Digest" json:"vertex"`
 	Level                int64                                      `protobuf:"varint,2,opt,name=level,proto3" json:"level,omitempty"`
 	Msg                  []byte                                     `protobuf:"bytes,3,opt,name=msg,proto3" json:"msg,omitempty"`
+	Info                 *pb.SourceInfo                             `protobuf:"bytes,4,opt,name=info,proto3" json:"info,omitempty"`
+	Ranges               []*pb.Range                                `protobuf:"bytes,5,rep,name=ranges,proto3" json:"ranges,omitempty"`
 	XXX_NoUnkeyedLiteral struct{}                                   `json:"-"`
 	XXX_unrecognized     []byte                                     `json:"-"`
 	XXX_sizecache        int32                                      `json:"-"`
@@ -1059,6 +1061,20 @@ func (m *VertexWarning) GetMsg() []byte {
 	return nil
 }
 
+func (m *VertexWarning) GetInfo() *pb.SourceInfo {
+	if m != nil {
+		return m.Info
+	}
+	return nil
+}
+
+func (m *VertexWarning) GetRanges() []*pb.Range {
+	if m != nil {
+		return m.Ranges
+	}
+	return nil
+}
+
 type BytesMessage struct {
 	Data                 []byte   `protobuf:"bytes,1,opt,name=data,proto3" json:"data,omitempty"`
 	XXX_NoUnkeyedLiteral struct{} `json:"-"`
@@ -1229,99 +1245,101 @@ func init() {
 func init() { proto.RegisterFile("control.proto", fileDescriptor_0c5120591600887d) }
 
 var fileDescriptor_0c5120591600887d = []byte{
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+	0xcf, 0xea, 0x9c, 0x86, 0x7b, 0x84, 0xd5, 0xe3, 0x4e, 0x9d, 0xc6, 0xdc, 0x68, 0xd7, 0xe7, 0x6a,
+	0xfb, 0x71, 0x50, 0x17, 0xa3, 0x98, 0xf0, 0xfa, 0x0b, 0xca, 0x76, 0x09, 0xd3, 0x00, 0xf7, 0x7b,
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+	0x28, 0x08, 0xb3, 0xad, 0xf5, 0x7c, 0xad, 0x82, 0x8d, 0x84, 0x56, 0x20, 0xef, 0x87, 0xa1, 0x9d,
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+	0x17, 0x2a, 0x52, 0x6e, 0x8e, 0x04, 0xe1, 0xf6, 0x42, 0x46, 0xed, 0x60, 0xdb, 0xbd, 0x06, 0x2b,
+	0xad, 0x80, 0xef, 0x3e, 0xe1, 0xfe, 0xe0, 0x38, 0x5b, 0xdc, 0x07, 0x70, 0x3e, 0xa3, 0xcb, 0x63,
+	0x1a, 0x71, 0x82, 0x6e, 0x41, 0x91, 0x91, 0x2e, 0x65, 0x3d, 0xa5, 0xbc, 0xd8, 0x78, 0xcf, 0x3b,
+	0x9c, 0x1b, 0xcf, 0x00, 0xa4, 0x12, 0x36, 0xca, 0xee, 0x8f, 0x79, 0x58, 0xcc, 0xec, 0xa3, 0x65,
+	0xc8, 0x6d, 0xb7, 0x6c, 0x6b, 0xdd, 0xaa, 0x55, 0x70, 0x6e, 0xbb, 0x85, 0x6c, 0x28, 0xed, 0x24,
+	0xc2, 0xef, 0x84, 0xc4, 0xf8, 0x9e, 0x8a, 0xe8, 0x22, 0x14, 0xb6, 0xa3, 0x27, 0x9c, 0x28, 0xc7,
+	0xcb, 0x58, 0x0b, 0x08, 0xc1, 0x42, 0x3b, 0xf8, 0x8e, 0x68, 0x37, 0xb1, 0x5a, 0x23, 0x07, 0x8a,
+	0x8f, 0x7c, 0x46, 0x22, 0x61, 0x17, 0x24, 0x6f, 0x33, 0x67, 0x5b, 0xd8, 0xec, 0xa0, 0x26, 0x54,
+	0xb6, 0x18, 0xf1, 0x05, 0xe9, 0xdd, 0x15, 0x76, 0x71, 0xdd, 0xaa, 0x2d, 0x36, 0x1c, 0x4f, 0x17,
+	0x85, 0x97, 0x16, 0x85, 0xf7, 0x38, 0x2d, 0x8a, 0x66, 0xf9, 0xd5, 0xfe, 0xda, 0xb9, 0x1f, 0xfe,
+	0x94, 0xb1, 0x1b, 0xc3, 0xd0, 0x1d, 0x80, 0x87, 0x3e, 0x17, 0x4f, 0xb8, 0x22, 0x29, 0x1d, 0x4b,
+	0xb2, 0xa0, 0x08, 0x32, 0x18, 0xb4, 0x0a, 0xa0, 0x82, 0xb0, 0x45, 0x93, 0x48, 0xd8, 0x65, 0x65,
+	0x7b, 0x66, 0x07, 0xad, 0xc3, 0x62, 0x8b, 0xf0, 0x2e, 0x0b, 0x62, 0x95, 0xea, 0x8a, 0x0a, 0x4f,
+	0x76, 0x4b, 0x32, 0xe8, 0x08, 0x3e, 0x1e, 0xc5, 0xc4, 0x06, 0xa5, 0x90, 0xd9, 0x91, 0xb9, 0x6c,
+	0x3f, 0xf7, 0x19, 0xe9, 0xd9, 0x8b, 0x2a, 0x5c, 0x46, 0x92, 0xf1, 0xd5, 0x91, 0xe0, 0x76, 0x55,
+	0x25, 0x39, 0x15, 0xdd, 0x9f, 0x8a, 0x50, 0x6d, 0xcb, 0x1a, 0x4f, 0xcb, 0x61, 0x05, 0xf2, 0x98,
+	0xf4, 0x4d, 0x6e, 0xe4, 0x12, 0x79, 0x00, 0x2d, 0xd2, 0x0f, 0xa2, 0x40, 0x59, 0x95, 0x53, 0x8e,
+	0x2f, 0x7b, 0x71, 0xc7, 0x3b, 0xd8, 0xc5, 0x19, 0x0d, 0xe4, 0x40, 0xf9, 0xde, 0xcb, 0x98, 0x32,
+	0x59, 0x52, 0x79, 0x45, 0x33, 0x96, 0xd1, 0x53, 0x58, 0x4a, 0xd7, 0x77, 0x85, 0x60, 0xb2, 0x50,
+	0x65, 0x19, 0xdd, 0x9c, 0x2e, 0xa3, 0xac, 0x51, 0xde, 0x04, 0xe6, 0x5e, 0x24, 0xd8, 0x08, 0x4f,
+	0xf2, 0x48, 0x0f, 0xdb, 0x84, 0x73, 0x69, 0xa1, 0x4a, 0x3f, 0x4e, 0x45, 0x69, 0xce, 0x17, 0x8c,
+	0x46, 0x82, 0x44, 0x3d, 0x95, 0xfa, 0x0a, 0x1e, 0xcb, 0xd2, 0x9c, 0x74, 0xad, 0xcd, 0x29, 0x9d,
+	0xc8, 0x9c, 0x09, 0x8c, 0x31, 0x67, 0x62, 0x0f, 0x6d, 0x42, 0x61, 0xcb, 0xef, 0x3e, 0x27, 0x2a,
+	0xcb, 0x8b, 0x8d, 0xd5, 0x69, 0x42, 0xf5, 0xf9, 0x4b, 0x95, 0x56, 0xae, 0x1a, 0xf5, 0x1c, 0xd6,
+	0x10, 0xf4, 0x0d, 0x54, 0xef, 0x45, 0x22, 0x10, 0x21, 0x19, 0xaa, 0x8c, 0x55, 0x64, 0xc6, 0x9a,
+	0x9b, 0xaf, 0xf7, 0xd7, 0x3e, 0x9a, 0x7b, 0xf0, 0x24, 0x22, 0x08, 0xeb, 0x24, 0x83, 0xf2, 0x32,
+	0x14, 0x78, 0x82, 0x0f, 0x3d, 0x83, 0xe5, 0xd4, 0xd8, 0xed, 0x28, 0x4e, 0x04, 0xb7, 0x41, 0x79,
+	0xdd, 0x38, 0xa1, 0xd7, 0x1a, 0xa4, 0xdd, 0x3e, 0xc4, 0xe4, 0xdc, 0x01, 0x34, 0x9d, 0x2b, 0x59,
+	0x53, 0xbb, 0x64, 0x94, 0xd6, 0xd4, 0x2e, 0x19, 0xc9, 0xb6, 0xde, 0xf3, 0xc3, 0x44, 0xb7, 0x7b,
+	0x05, 0x6b, 0x61, 0x33, 0x77, 0xdb, 0x92, 0x0c, 0xd3, 0xe1, 0x3d, 0x15, 0xc3, 0x57, 0x70, 0x61,
+	0x86, 0xa9, 0x33, 0x28, 0xae, 0x66, 0x29, 0xa6, 0x6b, 0xfa, 0x80, 0xd2, 0xfd, 0x25, 0x0f, 0xd5,
+	0x6c, 0xc2, 0xd0, 0x06, 0x5c, 0xd0, 0x7e, 0x62, 0xd2, 0x6f, 0x91, 0x98, 0x91, 0xae, 0x3c, 0x25,
+	0x0c, 0xf9, 0xac, 0x4f, 0xa8, 0x01, 0x17, 0xb7, 0x87, 0x66, 0x9b, 0x67, 0x20, 0x39, 0xd5, 0x8f,
+	0x33, 0xbf, 0x21, 0x0a, 0xef, 0x68, 0x2a, 0x15, 0x89, 0x0c, 0x28, 0xaf, 0x12, 0xf6, 0xf1, 0xd1,
+	0x55, 0xe5, 0xcd, 0xc4, 0xea, 0xbc, 0xcd, 0xe6, 0x45, 0x9f, 0x41, 0x49, 0x7f, 0x48, 0x1b, 0xf3,
+	0xca, 0xd1, 0x7f, 0xa1, 0xc9, 0x52, 0x8c, 0x84, 0x6b, 0x3f, 0xb8, 0x5d, 0x38, 0x05, 0xdc, 0x60,
+	0x9c, 0xfb, 0xe0, 0xcc, 0x37, 0xf9, 0x34, 0x25, 0xe0, 0xfe, 0x6c, 0xc1, 0xf9, 0xa9, 0x3f, 0x92,
+	0xb7, 0x86, 0x3a, 0x37, 0x35, 0x85, 0x5a, 0xa3, 0x16, 0x14, 0x74, 0xe7, 0xe7, 0x94, 0xc1, 0xde,
+	0x09, 0x0c, 0xf6, 0x32, 0x6d, 0xaf, 0xc1, 0xce, 0x6d, 0x80, 0xb3, 0x15, 0xab, 0xfb, 0xab, 0x05,
+	0x4b, 0xa6, 0xcb, 0xcc, 0x15, 0xeb, 0xc3, 0x4a, 0xda, 0x42, 0xe9, 0x9e, 0xb9, 0x6c, 0x6f, 0xcd,
+	0x6d, 0x50, 0xad, 0xe6, 0x1d, 0xc6, 0x69, 0x1b, 0xa7, 0xe8, 0x9c, 0xad, 0xb4, 0xae, 0x0e, 0xa9,
+	0x9e, 0xca, 0xf2, 0xcb, 0xb0, 0xd4, 0x16, 0xbe, 0x48, 0xf8, 0xdc, 0x9b, 0xc3, 0xfd, 0xd7, 0x82,
+	0xe5, 0x54, 0xc7, 0x78, 0xf7, 0x21, 0x94, 0xf7, 0x08, 0x13, 0xe4, 0x25, 0xe1, 0xc6, 0x2b, 0x7b,
+	0xda, 0xab, 0xaf, 0x95, 0x06, 0x1e, 0x6b, 0xa2, 0x4d, 0x28, 0x73, 0xc5, 0x43, 0xd2, 0x44, 0xad,
+	0xce, 0x43, 0x99, 0xff, 0x1b, 0xeb, 0xa3, 0x3a, 0x2c, 0x84, 0x74, 0xc0, 0x4d, 0xcf, 0xbc, 0x3b,
+	0x0f, 0xf7, 0x90, 0x0e, 0xb0, 0x52, 0x44, 0x9f, 0x40, 0xf9, 0x85, 0xcf, 0xa2, 0x20, 0x1a, 0xa4,
+	0x5d, 0xb0, 0x36, 0x0f, 0xf4, 0x54, 0xeb, 0xe1, 0x31, 0xc0, 0xdd, 0xcf, 0x41, 0x51, 0x7f, 0x43,
+	0x0f, 0xa0, 0xd8, 0x0b, 0x06, 0x84, 0x0b, 0x1d, 0x92, 0x66, 0x43, 0x1e, 0xf2, 0xaf, 0xf7, 0xd7,
+	0xae, 0x65, 0x4e, 0x71, 0x1a, 0x93, 0x48, 0x3e, 0x76, 0xfd, 0x20, 0x22, 0x8c, 0xd7, 0x07, 0xf4,
+	0x86, 0x86, 0x78, 0x2d, 0xf5, 0x83, 0x0d, 0x83, 0xe4, 0x0a, 0xf4, 0x59, 0xad, 0xce, 0x8b, 0xb3,
+	0x71, 0x69, 0x06, 0xd9, 0x06, 0x91, 0x3f, 0x24, 0xe6, 0x6e, 0x56, 0x6b, 0xf9, 0x70, 0xe8, 0xca,
+	0x3a, 0xef, 0xa9, 0x27, 0x55, 0x19, 0x1b, 0x09, 0x6d, 0x42, 0x89, 0x0b, 0x9f, 0xc9, 0x33, 0xa7,
+	0x70, 0xc2, 0x17, 0x4f, 0x0a, 0x40, 0x9f, 0x43, 0xa5, 0x4b, 0x87, 0x71, 0x48, 0x24, 0xba, 0x78,
+	0x42, 0xf4, 0x01, 0x44, 0x96, 0x1e, 0x61, 0x8c, 0x32, 0xf5, 0xd6, 0xaa, 0x60, 0x2d, 0xb8, 0xff,
+	0xe4, 0xa0, 0x9a, 0xcd, 0xf4, 0xd4, 0x5b, 0xf2, 0x01, 0x14, 0x75, 0xdd, 0xe8, 0x92, 0x3d, 0x5b,
+	0xa8, 0x34, 0xc3, 0xcc, 0x50, 0xd9, 0x50, 0xea, 0x26, 0x4c, 0x3d, 0x34, 0xf5, 0xf3, 0x33, 0x15,
+	0xa5, 0xc1, 0x82, 0x0a, 0x3f, 0x54, 0xa1, 0xca, 0x63, 0x2d, 0xc8, 0xb7, 0xe7, 0x78, 0xdc, 0x38,
+	0xdd, 0xdb, 0x73, 0x0c, 0xcb, 0xa6, 0xa1, 0xf4, 0x56, 0x69, 0x28, 0x9f, 0x3a, 0x0d, 0xee, 0x6f,
+	0x16, 0x54, 0xc6, 0x2d, 0x92, 0x89, 0xae, 0xf5, 0xd6, 0xd1, 0x9d, 0x88, 0x4c, 0xee, 0x6c, 0x91,
+	0xb9, 0x04, 0x45, 0x2e, 0x18, 0xf1, 0x87, 0x7a, 0x32, 0xc2, 0x46, 0x92, 0x87, 0xd1, 0x90, 0x0f,
+	0x54, 0x86, 0xaa, 0x58, 0x2e, 0xdd, 0xdf, 0x2d, 0x58, 0x9a, 0xe8, 0xda, 0xff, 0xd5, 0x97, 0x8b,
+	0x50, 0x08, 0xc9, 0x1e, 0xd1, 0xb3, 0x5b, 0x1e, 0x6b, 0x21, 0xb5, 0x22, 0x3f, 0xb6, 0x02, 0xb9,
+	0xb0, 0x10, 0x44, 0x7d, 0xaa, 0x0c, 0x33, 0x4f, 0x8e, 0x36, 0x4d, 0x58, 0x97, 0x6c, 0x47, 0x7d,
+	0x8a, 0xd5, 0x37, 0x74, 0x19, 0x8a, 0xcc, 0x8f, 0x06, 0x24, 0xbd, 0x45, 0x2b, 0x52, 0x0b, 0xcb,
+	0x1d, 0x6c, 0x3e, 0xb8, 0x2e, 0x54, 0xd5, 0x44, 0xb7, 0x43, 0xb8, 0x9c, 0x1f, 0x64, 0xa1, 0xf6,
+	0x7c, 0xe1, 0x2b, 0x47, 0xaa, 0x58, 0xad, 0xdd, 0xeb, 0x80, 0x1e, 0x06, 0x5c, 0x3c, 0x55, 0x93,
+	0x28, 0x3f, 0x6e, 0xdc, 0x6b, 0xc3, 0x85, 0x09, 0x6d, 0x73, 0x5e, 0x7f, 0x7a, 0x68, 0xe0, 0xbb,
+	0x3a, 0x7d, 0x14, 0xaa, 0x81, 0xd7, 0xd3, 0xc0, 0xc9, 0xb9, 0xaf, 0xf1, 0x77, 0x1e, 0x4a, 0x5b,
+	0x7a, 0x96, 0x47, 0x8f, 0xa1, 0x32, 0x9e, 0x27, 0x91, 0x3b, 0x4d, 0x73, 0x78, 0x30, 0x75, 0xae,
+	0x1c, 0xa9, 0x63, 0xec, 0xbb, 0x0f, 0x05, 0x35, 0x59, 0xa3, 0x19, 0x17, 0x42, 0x76, 0xe4, 0x76,
+	0x8e, 0x9e, 0x54, 0x37, 0x2c, 0xc9, 0xa4, 0x6e, 0xd3, 0x59, 0x4c, 0xd9, 0x77, 0xb0, 0xb3, 0x76,
+	0xcc, 0x35, 0x8c, 0x76, 0xa0, 0x68, 0xce, 0xa6, 0x59, 0xaa, 0xd9, 0x3b, 0xd3, 0x59, 0x9f, 0xaf,
+	0xa0, 0xc9, 0x36, 0x2c, 0xb4, 0x33, 0x1e, 0x6d, 0x66, 0x99, 0x96, 0x2d, 0x03, 0xe7, 0x98, 0xef,
+	0x35, 0x6b, 0xc3, 0x42, 0xcf, 0x60, 0x31, 0x93, 0x68, 0x34, 0x23, 0xa1, 0xd3, 0x55, 0xe3, 0xbc,
+	0x7f, 0x8c, 0x96, 0x36, 0xb6, 0x59, 0x7d, 0xf5, 0x66, 0xd5, 0xfa, 0xe3, 0xcd, 0xaa, 0xf5, 0xd7,
+	0x9b, 0x55, 0xab, 0x53, 0x54, 0x4d, 0xfc, 0xc1, 0x7f, 0x01, 0x00, 0x00, 0xff, 0xff, 0x42, 0x5e,
+	0x7e, 0x04, 0xcf, 0x11, 0x00, 0x00,
 }
 
 // Reference imports to suppress errors if they are not otherwise used.
@@ -2633,6 +2651,32 @@ func (m *VertexWarning) MarshalToSizedBuffer(dAtA []byte) (int, error) {
 		i -= len(m.XXX_unrecognized)
 		copy(dAtA[i:], m.XXX_unrecognized)
 	}
+	if len(m.Ranges) > 0 {
+		for iNdEx := len(m.Ranges) - 1; iNdEx >= 0; iNdEx-- {
+			{
+				size, err := m.Ranges[iNdEx].MarshalToSizedBuffer(dAtA[:i])
+				if err != nil {
+					return 0, err
+				}
+				i -= size
+				i = encodeVarintControl(dAtA, i, uint64(size))
+			}
+			i--
+			dAtA[i] = 0x2a
+		}
+	}
+	if m.Info != nil {
+		{
+			size, err := m.Info.MarshalToSizedBuffer(dAtA[:i])
+			if err != nil {
+				return 0, err
+			}
+			i -= size
+			i = encodeVarintControl(dAtA, i, uint64(size))
+		}
+		i--
+		dAtA[i] = 0x22
+	}
 	if len(m.Msg) > 0 {
 		i -= len(m.Msg)
 		copy(dAtA[i:], m.Msg)
@@ -3225,6 +3269,16 @@ func (m *VertexWarning) Size() (n int) {
 	if l > 0 {
 		n += 1 + l + sovControl(uint64(l))
 	}
+	if m.Info != nil {
+		l = m.Info.Size()
+		n += 1 + l + sovControl(uint64(l))
+	}
+	if len(m.Ranges) > 0 {
+		for _, e := range m.Ranges {
+			l = e.Size()
+			n += 1 + l + sovControl(uint64(l))
+		}
+	}
 	if m.XXX_unrecognized != nil {
 		n += len(m.XXX_unrecognized)
 	}
@@ -6451,6 +6505,76 @@ func (m *VertexWarning) Unmarshal(dAtA []byte) error {
 				m.Msg = []byte{}
 			}
 			iNdEx = postIndex
+		case 4:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field Info", wireType)
+			}
+			var msglen int
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowControl
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				msglen |= int(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			if msglen < 0 {
+				return ErrInvalidLengthControl
+			}
+			postIndex := iNdEx + msglen
+			if postIndex < 0 {
+				return ErrInvalidLengthControl
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			if m.Info == nil {
+				m.Info = &pb.SourceInfo{}
+			}
+			if err := m.Info.Unmarshal(dAtA[iNdEx:postIndex]); err != nil {
+				return err
+			}
+			iNdEx = postIndex
+		case 5:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field Ranges", wireType)
+			}
+			var msglen int
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowControl
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				msglen |= int(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			if msglen < 0 {
+				return ErrInvalidLengthControl
+			}
+			postIndex := iNdEx + msglen
+			if postIndex < 0 {
+				return ErrInvalidLengthControl
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.Ranges = append(m.Ranges, &pb.Range{})
+			if err := m.Ranges[len(m.Ranges)-1].Unmarshal(dAtA[iNdEx:postIndex]); err != nil {
+				return err
+			}
+			iNdEx = postIndex
 		default:
 			iNdEx = preIndex
 			skippy, err := skipControl(dAtA[iNdEx:])
diff --git a/api/services/control/control.proto b/api/services/control/control.proto
index 85aa076273d5..a6be5dda59bc 100644
--- a/api/services/control/control.proto
+++ b/api/services/control/control.proto
@@ -139,6 +139,8 @@ message VertexWarning {
 	string vertex = 1 [(gogoproto.customtype) = "github.com/opencontainers/go-digest.Digest", (gogoproto.nullable) = false];
 	int64 level = 2;
 	bytes msg = 3;
+	pb.SourceInfo info = 4;
+	repeated pb.Range ranges = 5;
 }
 
 message BytesMessage {
diff --git a/client/build_test.go b/client/build_test.go
index 4e26b6e3d100..aed55c6f60b6 100644
--- a/client/build_test.go
+++ b/client/build_test.go
@@ -184,7 +184,17 @@ func testWarnings(t *testing.T, sb integration.Sandbox) {
 			return nil, errors.Wrap(err, "failed to solve")
 		}
 
-		require.NoError(t, c.Warn(ctx, dgst, "this is warning"))
+		require.NoError(t, c.Warn(ctx, dgst, "this is warning", client.WarnOpts{
+			Level: 3,
+			SourceInfo: &pb.SourceInfo{
+				Filename: "mydockerfile",
+				Data:     []byte("filedata"),
+			},
+			Range: []*pb.Range{
+				{Start: pb.Position{Line: 2}, End: pb.Position{Line: 4}},
+			},
+		}))
+
 		return r, nil
 	}
 
@@ -230,10 +240,16 @@ func testWarnings(t *testing.T, sb integration.Sandbox) {
 	w := warnings[0]
 
 	require.Equal(t, "this is warning", string(w.Message))
-	require.Equal(t, 1, w.Level)
+	require.Equal(t, 3, w.Level)
 	_, ok := vertexes[w.Vertex]
 	require.True(t, ok)
 
+	require.Equal(t, "mydockerfile", w.SourceInfo.Filename)
+	require.Equal(t, "filedata", string(w.SourceInfo.Data))
+	require.Equal(t, 1, len(w.Range))
+	require.Equal(t, int32(2), w.Range[0].Start.Line)
+	require.Equal(t, int32(4), w.Range[0].End.Line)
+
 	checkAllReleasable(t, c, sb, true)
 }
 
diff --git a/client/graph.go b/client/graph.go
index 95ffee149e0c..5932d0cf2092 100644
--- a/client/graph.go
+++ b/client/graph.go
@@ -3,6 +3,7 @@ package client
 import (
 	"time"
 
+	"github.com/moby/buildkit/solver/pb"
 	digest "github.com/opencontainers/go-digest"
 )
 
@@ -35,9 +36,11 @@ type VertexLog struct {
 }
 
 type VertexWarning struct {
-	Vertex  digest.Digest
-	Level   int
-	Message []byte
+	Vertex     digest.Digest
+	Level      int
+	Message    []byte
+	SourceInfo *pb.SourceInfo
+	Range      []*pb.Range
 }
 
 type SolveStatus struct {
diff --git a/client/solve.go b/client/solve.go
index db8cf7ff6058..ded48bfdeac3 100644
--- a/client/solve.go
+++ b/client/solve.go
@@ -294,9 +294,11 @@ func (c *Client) solve(ctx context.Context, def *llb.Definition, runGateway runG
 			}
 			for _, v := range resp.Warnings {
 				s.Warnings = append(s.Warnings, &VertexWarning{
-					Vertex:  v.Vertex,
-					Level:   int(v.Level),
-					Message: v.Msg,
+					Vertex:     v.Vertex,
+					Level:      int(v.Level),
+					Message:    v.Msg,
+					SourceInfo: v.Info,
+					Range:      v.Ranges,
 				})
 			}
 			if statusChan != nil {
diff --git a/control/control.go b/control/control.go
index 475def1b7d77..ab61b0031995 100644
--- a/control/control.go
+++ b/control/control.go
@@ -381,6 +381,8 @@ func (c *Controller) Status(req *controlapi.StatusRequest, stream controlapi.Con
 						Vertex: v.Vertex,
 						Level:  int64(v.Level),
 						Msg:    v.Message,
+						Info:   v.SourceInfo,
+						Ranges: v.Range,
 					})
 				}
 				if err := stream.SendMsg(&sr); err != nil {
diff --git a/frontend/frontend.go b/frontend/frontend.go
index ad6720257a11..dedda54c6104 100644
--- a/frontend/frontend.go
+++ b/frontend/frontend.go
@@ -17,9 +17,11 @@ type Frontend interface {
 type FrontendLLBBridge interface {
 	Solve(ctx context.Context, req SolveRequest, sid string) (*Result, error)
 	ResolveImageConfig(ctx context.Context, ref string, opt llb.ResolveImageConfigOpt) (digest.Digest, []byte, error)
-	Warn(ctx context.Context, dgst digest.Digest, level int, msg string) error
+	Warn(ctx context.Context, dgst digest.Digest, msg string, opts WarnOpts) error
 }
 
 type SolveRequest = gw.SolveRequest
 
 type CacheOptionsEntry = gw.CacheOptionsEntry
+
+type WarnOpts = gw.WarnOpts
diff --git a/frontend/gateway/client/client.go b/frontend/gateway/client/client.go
index efa0da00ef34..62ebb719270e 100644
--- a/frontend/gateway/client/client.go
+++ b/frontend/gateway/client/client.go
@@ -18,7 +18,7 @@ type Client interface {
 	BuildOpts() BuildOpts
 	Inputs(ctx context.Context) (map[string]llb.State, error)
 	NewContainer(ctx context.Context, req NewContainerRequest) (Container, error)
-	Warn(ctx context.Context, dgst digest.Digest, msg string) error
+	Warn(ctx context.Context, dgst digest.Digest, msg string, opts WarnOpts) error
 }
 
 // NewContainerRequest encapsulates the requirements for a client to define a
@@ -134,3 +134,9 @@ type BuildOpts struct {
 	LLBCaps   apicaps.CapSet
 	Caps      apicaps.CapSet
 }
+
+type WarnOpts struct {
+	Level      int
+	SourceInfo *pb.SourceInfo
+	Range      []*pb.Range
+}
diff --git a/frontend/gateway/forwarder/forward.go b/frontend/gateway/forwarder/forward.go
index cd731acdf614..2964ad02bd06 100644
--- a/frontend/gateway/forwarder/forward.go
+++ b/frontend/gateway/forwarder/forward.go
@@ -217,8 +217,8 @@ func (c *bridgeClient) discard(err error) {
 	}
 }
 
-func (c *bridgeClient) Warn(ctx context.Context, dgst digest.Digest, msg string) error {
-	return c.FrontendLLBBridge.Warn(ctx, dgst, 1, msg)
+func (c *bridgeClient) Warn(ctx context.Context, dgst digest.Digest, msg string, opts client.WarnOpts) error {
+	return c.FrontendLLBBridge.Warn(ctx, dgst, msg, opts)
 }
 
 func (c *bridgeClient) NewContainer(ctx context.Context, req client.NewContainerRequest) (client.Container, error) {
diff --git a/frontend/gateway/gateway.go b/frontend/gateway/gateway.go
index 3d94348f239a..f44fb9202b5d 100644
--- a/frontend/gateway/gateway.go
+++ b/frontend/gateway/gateway.go
@@ -994,7 +994,11 @@ func (lbf *llbBridgeForwarder) ReleaseContainer(ctx context.Context, in *pb.Rele
 }
 
 func (lbf *llbBridgeForwarder) Warn(ctx context.Context, in *pb.WarnRequest) (*pb.WarnResponse, error) {
-	err := lbf.llbBridge.Warn(ctx, in.Digest, int(in.Level), string(in.Message))
+	err := lbf.llbBridge.Warn(ctx, in.Digest, string(in.Message), frontend.WarnOpts{
+		Level:      int(in.Level),
+		SourceInfo: in.Info,
+		Range:      in.Ranges,
+	})
 	if err != nil {
 		return nil, err
 	}
diff --git a/frontend/gateway/grpcclient/client.go b/frontend/gateway/grpcclient/client.go
index 22479256e001..4596e290c3a7 100644
--- a/frontend/gateway/grpcclient/client.go
+++ b/frontend/gateway/grpcclient/client.go
@@ -298,11 +298,13 @@ func (c *grpcClient) requestForRef(ref client.Reference) (*pb.SolveRequest, erro
 	return req, nil
 }
 
-func (c *grpcClient) Warn(ctx context.Context, dgst digest.Digest, msg string) error {
+func (c *grpcClient) Warn(ctx context.Context, dgst digest.Digest, msg string, opts client.WarnOpts) error {
 	_, err := c.client.Warn(ctx, &pb.WarnRequest{
 		Digest:  dgst,
-		Level:   1,
+		Level:   int64(opts.Level),
 		Message: []byte(msg),
+		Info:    opts.SourceInfo,
+		Ranges:  opts.Range,
 	})
 	return err
 }
diff --git a/frontend/gateway/pb/gateway.pb.go b/frontend/gateway/pb/gateway.pb.go
index 1a0623402479..94752db4d31b 100644
--- a/frontend/gateway/pb/gateway.pb.go
+++ b/frontend/gateway/pb/gateway.pb.go
@@ -1334,6 +1334,8 @@ type WarnRequest struct {
 	Digest               github_com_opencontainers_go_digest.Digest `protobuf:"bytes,1,opt,name=Digest,proto3,customtype=github.com/opencontainers/go-digest.Digest" json:"Digest"`
 	Level                int64                                      `protobuf:"varint,2,opt,name=Level,proto3" json:"Level,omitempty"`
 	Message              []byte                                     `protobuf:"bytes,3,opt,name=Message,proto3" json:"Message,omitempty"`
+	Info                 *pb.SourceInfo                             `protobuf:"bytes,4,opt,name=info,proto3" json:"info,omitempty"`
+	Ranges               []*pb.Range                                `protobuf:"bytes,5,rep,name=ranges,proto3" json:"ranges,omitempty"`
 	XXX_NoUnkeyedLiteral struct{}                                   `json:"-"`
 	XXX_unrecognized     []byte                                     `json:"-"`
 	XXX_sizecache        int32                                      `json:"-"`
@@ -1386,6 +1388,20 @@ func (m *WarnRequest) GetMessage() []byte {
 	return nil
 }
 
+func (m *WarnRequest) GetInfo() *pb.SourceInfo {
+	if m != nil {
+		return m.Info
+	}
+	return nil
+}
+
+func (m *WarnRequest) GetRanges() []*pb.Range {
+	if m != nil {
+		return m.Ranges
+	}
+	return nil
+}
+
 type WarnResponse struct {
 	XXX_NoUnkeyedLiteral struct{} `json:"-"`
 	XXX_unrecognized     []byte   `json:"-"`
@@ -2164,132 +2180,134 @@ func init() {
 func init() { proto.RegisterFile("gateway.proto", fileDescriptor_f1a937782ebbded5) }
 
 var fileDescriptor_f1a937782ebbded5 = []byte{
-	// 1987 bytes of a gzipped FileDescriptorProto
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+	0x03, 0xa1, 0xd1, 0xfa, 0x88, 0x09, 0x91, 0x98, 0x06, 0xbb, 0x78, 0xdd, 0x7c, 0xc9, 0xec, 0xa6,
+	0xb2, 0x79, 0xb8, 0x76, 0x3e, 0x83, 0xe5, 0xc9, 0x58, 0xce, 0x53, 0xf4, 0x9d, 0x5f, 0xc1, 0xed,
+	0x29, 0x2a, 0xfc, 0x5f, 0xf5, 0xe0, 0xef, 0x16, 0xbc, 0x75, 0xc5, 0x6f, 0x84, 0x40, 0xf1, 0xcb,
+	0xcb, 0x98, 0x19, 0x91, 0xea, 0x9b, 0x1c, 0x41, 0x09, 0xe3, 0x92, 0xd8, 0x8b, 0xca, 0x69, 0x1b,
+	0xf3, 0x04, 0xc2, 0x53, 0x48, 0xed, 0x30, 0x2d, 0xc5, 0x79, 0x04, 0x30, 0x22, 0xce, 0xd5, 0xfa,
+	0xbe, 0x86, 0x86, 0x89, 0x8a, 0x29, 0x0f, 0xcb, 0x7a, 0x4a, 0x31, 0x60, 0x9c, 0x41, 0x46, 0xed,
+	0xa2, 0x30, 0x67, 0xbb, 0x70, 0xbf, 0x85, 0x5b, 0x94, 0xf9, 0xc1, 0x5e, 0xd8, 0x67, 0xd7, 0x57,
+	0x45, 0xbc, 0xeb, 0x61, 0x9f, 0x9d, 0xf8, 0xf2, 0xf9, 0xf0, 0xae, 0x9b, 0x35, 0xd9, 0x84, 0x12,
+	0xf5, 0xa3, 0x1e, 0x33, 0x47, 0xbf, 0x9f, 0x73, 0xb4, 0x3a, 0x04, 0x79, 0xa9, 0x86, 0xb8, 0x8f,
+	0xa1, 0x3a, 0xa4, 0x61, 0xa5, 0x7a, 0xda, 0xed, 0x26, 0x4c, 0x57, 0xbd, 0x02, 0x35, 0x2b, 0xa4,
+	0x1f, 0xb2, 0xa8, 0x67, 0x8e, 0x2e, 0x50, 0xb3, 0x72, 0x57, 0x71, 0x54, 0x49, 0x35, 0x37, 0xae,
+	0x21, 0x50, 0xdc, 0xc1, 0x79, 0xca, 0x52, 0x17, 0x4c, 0x7d, 0xbb, 0x01, 0xb6, 0x39, 0x3f, 0xd8,
+	0x09, 0xc5, 0xf5, 0x06, 0xda, 0x50, 0xde, 0x09, 0x45, 0xc6, 0xbe, 0x74, 0x49, 0x56, 0xb1, 0x01,
+	0x76, 0xfa, 0x83, 0x00, 0xad, 0x95, 0x4c, 0x44, 0xa6, 0xd2, 0x4f, 0x50, 0xdd, 0xcf, 0xb5, 0x1f,
+	0xd5, 0x29, 0x46, 0x99, 0x35, 0x28, 0xb3, 0x48, 0x8a, 0x90, 0xa5, 0x5d, 0x92, 0x78, 0x7a, 0x04,
+	0xf6, 0xd4, 0x08, 0xac, 0xba, 0x31, 0x4d, 0x59, 0xdc, 0x0d, 0xb8, 0x85, 0x84, 0xfc, 0x40, 0x10,
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+	0x6d, 0xca, 0xf8, 0xb4, 0x73, 0xd5, 0xbe, 0xdb, 0x80, 0xda, 0x49, 0x18, 0xa5, 0xfd, 0xd0, 0x7d,
+	0x63, 0x41, 0xfd, 0x84, 0x47, 0xa3, 0x4e, 0x74, 0x02, 0xb7, 0xd2, 0x1b, 0xf8, 0xe4, 0xe4, 0x60,
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+	0x45, 0x27, 0xe1, 0xe4, 0x17, 0x50, 0x3e, 0x3c, 0xdc, 0x52, 0x92, 0x16, 0xe7, 0x92, 0x94, 0xc2,
+	0xc8, 0x67, 0x50, 0x7e, 0xa6, 0x9e, 0x28, 0x89, 0x69, 0x2c, 0x53, 0x52, 0x4e, 0x1b, 0xaa, 0xd9,
+	0x28, 0xeb, 0x70, 0x11, 0xd0, 0x14, 0xe4, 0x7e, 0x6f, 0x41, 0xed, 0x99, 0x3f, 0x9a, 0xb5, 0x7e,
+	0xc8, 0x6e, 0x7b, 0x07, 0x4a, 0x87, 0xec, 0x25, 0xeb, 0x9b, 0x54, 0xd5, 0x0b, 0xcc, 0xae, 0x23,
+	0x96, 0x24, 0xbe, 0xb9, 0x24, 0x75, 0x9a, 0x2e, 0x89, 0x0b, 0xc5, 0x30, 0xea, 0x72, 0xf3, 0x78,
+	0x50, 0x75, 0xeb, 0x94, 0x0f, 0x44, 0x87, 0x1d, 0x44, 0x5d, 0x4e, 0xd5, 0x1e, 0x79, 0x0f, 0x96,
+	0x04, 0x5e, 0x90, 0xc4, 0x2e, 0x29, 0x73, 0xab, 0xc8, 0xa5, 0xaf, 0x91, 0xd9, 0x70, 0x9b, 0x50,
+	0xd7, 0x16, 0x99, 0x39, 0xee, 0x4f, 0x8b, 0x70, 0xfb, 0x98, 0x5d, 0x6c, 0xa7, 0x1a, 0xa7, 0xa6,
+	0xae, 0x40, 0x6d, 0x48, 0x3b, 0xd8, 0x31, 0x89, 0x95, 0x25, 0xe1, 0x61, 0x47, 0x7c, 0x10, 0xc9,
+	0x34, 0x3a, 0xea, 0x30, 0x45, 0xa1, 0x66, 0x83, 0xfc, 0x04, 0xca, 0xc7, 0x4c, 0xe2, 0x2b, 0x51,
+	0x59, 0xd3, 0x5c, 0xaf, 0x21, 0xcf, 0x31, 0x93, 0x38, 0xf4, 0xd0, 0x74, 0x0f, 0x27, 0xa9, 0x38,
+	0x9d, 0xa4, 0x8a, 0xd3, 0x26, 0xa9, 0x74, 0x97, 0x6c, 0x40, 0xad, 0xc3, 0xa3, 0x44, 0x0a, 0x3f,
+	0xc4, 0x83, 0x4b, 0x8a, 0xf9, 0x47, 0xc8, 0xac, 0x43, 0xb6, 0x3d, 0xda, 0xa4, 0x59, 0x4e, 0xf2,
+	0x00, 0x80, 0xbd, 0x92, 0xc2, 0xdf, 0xe7, 0x89, 0x4c, 0xec, 0x25, 0xa5, 0x30, 0x20, 0x0e, 0x09,
+	0x07, 0x27, 0x34, 0xb3, 0xeb, 0xbe, 0x0d, 0x77, 0xc6, 0x3d, 0x62, 0x5c, 0xf5, 0x18, 0x7e, 0x4c,
+	0x59, 0x9f, 0xf9, 0x09, 0x9b, 0xdf, 0x5b, 0xae, 0x03, 0xf6, 0x55, 0xb0, 0x11, 0xfc, 0x8f, 0x02,
+	0xd4, 0x76, 0x5f, 0xb1, 0x4e, 0x1a, 0xea, 0x77, 0xa0, 0x7a, 0x22, 0x78, 0x87, 0x25, 0xc9, 0x50,
+	0xd6, 0x88, 0x40, 0x3e, 0x85, 0xe2, 0x41, 0x14, 0x4a, 0xd3, 0xc0, 0x56, 0x73, 0xc7, 0xe9, 0x50,
+	0x1a, 0x99, 0xf8, 0x94, 0xc4, 0x25, 0xd9, 0x84, 0x22, 0x5e, 0xff, 0x9b, 0x94, 0xe0, 0x20, 0x83,
+	0x45, 0x0c, 0xd9, 0x52, 0x8f, 0xef, 0xf0, 0x1b, 0x66, 0xa2, 0xd4, 0xca, 0xef, 0x1d, 0xe1, 0x37,
+	0x6c, 0x24, 0xc1, 0x20, 0xc9, 0x2e, 0x94, 0x4f, 0xa5, 0x2f, 0x70, 0x02, 0xd3, 0xd1, 0xbb, 0x9f,
+	0x37, 0x62, 0x68, 0xce, 0x91, 0x94, 0x14, 0x8b, 0x4e, 0xd8, 0x7d, 0x15, 0x4a, 0x35, 0x5f, 0xe5,
+	0x3b, 0x01, 0xd9, 0x32, 0x86, 0xe0, 0x12, 0xd1, 0x3b, 0x3c, 0x62, 0x76, 0x79, 0x26, 0x1a, 0xd9,
+	0x32, 0x68, 0x5c, 0x6e, 0x95, 0xa1, 0xa4, 0x66, 0x0c, 0xf7, 0xaf, 0x16, 0xd4, 0x32, 0x3e, 0xbe,
+	0xc1, 0x9d, 0x79, 0x07, 0x8a, 0xf8, 0xf6, 0x36, 0xb1, 0xab, 0xa8, 0x1b, 0xc3, 0xa4, 0x4f, 0x15,
+	0x15, 0x8b, 0xf8, 0x5e, 0xa0, 0x4b, 0x55, 0x83, 0xe2, 0x27, 0x52, 0xbe, 0x94, 0x97, 0xca, 0xdd,
+	0x15, 0x8a, 0x9f, 0x64, 0x0d, 0x2a, 0xa7, 0xac, 0x33, 0x10, 0xa1, 0xbc, 0x54, 0x0e, 0x6c, 0xae,
+	0x2f, 0xab, 0x52, 0x60, 0x68, 0xea, 0x62, 0x0d, 0x39, 0xdc, 0x2f, 0x30, 0xb1, 0x46, 0x0a, 0x12,
+	0x28, 0x6e, 0xe3, 0x0b, 0x04, 0x35, 0x6b, 0x50, 0xf5, 0x8d, 0x8f, 0xc0, 0xdd, 0x59, 0x8f, 0xc0,
+	0xdd, 0xf4, 0x11, 0x38, 0x1e, 0x10, 0xec, 0x09, 0x19, 0x07, 0xb9, 0x4f, 0xa0, 0x3a, 0x4c, 0x1a,
+	0x7c, 0x7f, 0xef, 0x05, 0xe6, 0xa4, 0xc5, 0xbd, 0x00, 0x4d, 0xd9, 0x7d, 0xba, 0xa7, 0x4e, 0xa9,
+	0x50, 0xfc, 0x1c, 0x76, 0xe0, 0x42, 0xa6, 0x03, 0x6f, 0xe0, 0xf3, 0x36, 0x93, 0x39, 0xc8, 0x44,
+	0xf9, 0x45, 0x92, 0xaa, 0x8c, 0xdf, 0xda, 0x8c, 0x7e, 0xa2, 0x64, 0x29, 0x33, 0xfa, 0xc9, 0xfa,
+	0xbf, 0xaa, 0x50, 0x3d, 0x3c, 0xdc, 0xda, 0x12, 0x61, 0xd0, 0x63, 0xe4, 0x0f, 0x16, 0x90, 0xab,
+	0xaf, 0x26, 0xf2, 0x71, 0x7e, 0xc2, 0x4e, 0x7f, 0xfa, 0x39, 0x9f, 0xcc, 0x89, 0x32, 0x0d, 0xf1,
+	0x2b, 0x28, 0xa9, 0x61, 0x8c, 0xfc, 0xf4, 0x86, 0x43, 0xb4, 0xd3, 0x9a, 0xcd, 0x68, 0x64, 0x77,
+	0xa0, 0x92, 0x0e, 0x34, 0xe4, 0x41, 0xae, 0x7a, 0x63, 0xf3, 0x9a, 0xf3, 0xc1, 0x8d, 0x78, 0xcd,
+	0x21, 0xbf, 0x85, 0xb2, 0x99, 0x53, 0xc8, 0xfd, 0x19, 0xb8, 0xd1, 0xc4, 0xe4, 0x3c, 0xb8, 0x09,
+	0xeb, 0xc8, 0x8c, 0x74, 0x1e, 0xc9, 0x35, 0x63, 0x62, 0xda, 0xc9, 0x35, 0xe3, 0xca, 0x80, 0xf3,
+	0x0c, 0x8a, 0x38, 0xb8, 0x90, 0xbc, 0x6b, 0x9e, 0x99, 0x6c, 0x9c, 0xbc, 0x70, 0x8d, 0x4d, 0x3c,
+	0xbf, 0xc1, 0x72, 0xa8, 0x1e, 0x7f, 0xf9, 0x85, 0x30, 0xf3, 0x6f, 0x8d, 0x73, 0xff, 0x06, 0x9c,
+	0x23, 0xf1, 0xe6, 0xe1, 0xd4, 0xba, 0xc1, 0x5f, 0x26, 0xb3, 0xc5, 0x4f, 0xfc, 0x39, 0xc3, 0xa1,
+	0x9e, 0xed, 0x72, 0xc4, 0xcb, 0x81, 0x4e, 0x19, 0x10, 0x9c, 0xf6, 0x8d, 0xf9, 0xcd, 0x81, 0xdf,
+	0xe2, 0x10, 0x3e, 0xde, 0x01, 0xc9, 0x7a, 0xae, 0x3b, 0xa6, 0xf6, 0x5a, 0xe7, 0xe1, 0x5c, 0x18,
+	0x73, 0xb8, 0xaf, 0x3b, 0xac, 0xe9, 0xa2, 0x24, 0xbf, 0x61, 0x0c, 0x3b, 0xb1, 0x73, 0x43, 0xbe,
+	0x96, 0xf5, 0x91, 0x85, 0x79, 0x86, 0x93, 0x55, 0xae, 0xec, 0xcc, 0x30, 0x99, 0x9b, 0x67, 0xd9,
+	0x11, 0x6d, 0xab, 0xfe, 0xdd, 0x9b, 0x7b, 0xd6, 0xf7, 0x6f, 0xee, 0x59, 0xff, 0x79, 0x73, 0xcf,
+	0x3a, 0x5b, 0x52, 0xff, 0x84, 0x3f, 0xfc, 0x5f, 0x00, 0x00, 0x00, 0xff, 0xff, 0x88, 0x89, 0x64,
+	0x24, 0x5b, 0x18, 0x00, 0x00,
 }
 
 // Reference imports to suppress errors if they are not otherwise used.
@@ -4026,6 +4044,32 @@ func (m *WarnRequest) MarshalToSizedBuffer(dAtA []byte) (int, error) {
 		i -= len(m.XXX_unrecognized)
 		copy(dAtA[i:], m.XXX_unrecognized)
 	}
+	if len(m.Ranges) > 0 {
+		for iNdEx := len(m.Ranges) - 1; iNdEx >= 0; iNdEx-- {
+			{
+				size, err := m.Ranges[iNdEx].MarshalToSizedBuffer(dAtA[:i])
+				if err != nil {
+					return 0, err
+				}
+				i -= size
+				i = encodeVarintGateway(dAtA, i, uint64(size))
+			}
+			i--
+			dAtA[i] = 0x2a
+		}
+	}
+	if m.Info != nil {
+		{
+			size, err := m.Info.MarshalToSizedBuffer(dAtA[:i])
+			if err != nil {
+				return 0, err
+			}
+			i -= size
+			i = encodeVarintGateway(dAtA, i, uint64(size))
+		}
+		i--
+		dAtA[i] = 0x22
+	}
 	if len(m.Message) > 0 {
 		i -= len(m.Message)
 		copy(dAtA[i:], m.Message)
@@ -4463,20 +4507,20 @@ func (m *InitMessage) MarshalToSizedBuffer(dAtA []byte) (int, error) {
 		dAtA[i] = 0x20
 	}
 	if len(m.Fds) > 0 {
-		dAtA24 := make([]byte, len(m.Fds)*10)
-		var j23 int
+		dAtA25 := make([]byte, len(m.Fds)*10)
+		var j24 int
 		for _, num := range m.Fds {
 			for num >= 1<<7 {
-				dAtA24[j23] = uint8(uint64(num)&0x7f | 0x80)
+				dAtA25[j24] = uint8(uint64(num)&0x7f | 0x80)
 				num >>= 7
-				j23++
+				j24++
 			}
-			dAtA24[j23] = uint8(num)
-			j23++
+			dAtA25[j24] = uint8(num)
+			j24++
 		}
-		i -= j23
-		copy(dAtA[i:], dAtA24[:j23])
-		i = encodeVarintGateway(dAtA, i, uint64(j23))
+		i -= j24
+		copy(dAtA[i:], dAtA25[:j24])
+		i = encodeVarintGateway(dAtA, i, uint64(j24))
 		i--
 		dAtA[i] = 0x1a
 	}
@@ -5260,6 +5304,16 @@ func (m *WarnRequest) Size() (n int) {
 	if l > 0 {
 		n += 1 + l + sovGateway(uint64(l))
 	}
+	if m.Info != nil {
+		l = m.Info.Size()
+		n += 1 + l + sovGateway(uint64(l))
+	}
+	if len(m.Ranges) > 0 {
+		for _, e := range m.Ranges {
+			l = e.Size()
+			n += 1 + l + sovGateway(uint64(l))
+		}
+	}
 	if m.XXX_unrecognized != nil {
 		n += len(m.XXX_unrecognized)
 	}
@@ -9029,6 +9083,76 @@ func (m *WarnRequest) Unmarshal(dAtA []byte) error {
 				m.Message = []byte{}
 			}
 			iNdEx = postIndex
+		case 4:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field Info", wireType)
+			}
+			var msglen int
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowGateway
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				msglen |= int(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			if msglen < 0 {
+				return ErrInvalidLengthGateway
+			}
+			postIndex := iNdEx + msglen
+			if postIndex < 0 {
+				return ErrInvalidLengthGateway
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			if m.Info == nil {
+				m.Info = &pb.SourceInfo{}
+			}
+			if err := m.Info.Unmarshal(dAtA[iNdEx:postIndex]); err != nil {
+				return err
+			}
+			iNdEx = postIndex
+		case 5:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field Ranges", wireType)
+			}
+			var msglen int
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowGateway
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				msglen |= int(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			if msglen < 0 {
+				return ErrInvalidLengthGateway
+			}
+			postIndex := iNdEx + msglen
+			if postIndex < 0 {
+				return ErrInvalidLengthGateway
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.Ranges = append(m.Ranges, &pb.Range{})
+			if err := m.Ranges[len(m.Ranges)-1].Unmarshal(dAtA[iNdEx:postIndex]); err != nil {
+				return err
+			}
+			iNdEx = postIndex
 		default:
 			iNdEx = preIndex
 			skippy, err := skipGateway(dAtA[iNdEx:])
diff --git a/frontend/gateway/pb/gateway.proto b/frontend/gateway/pb/gateway.proto
index 8e46d812e076..5bf0a0bcfc73 100644
--- a/frontend/gateway/pb/gateway.proto
+++ b/frontend/gateway/pb/gateway.proto
@@ -9,6 +9,7 @@ import "github.com/moby/buildkit/api/types/worker.proto";
 import "github.com/moby/buildkit/util/apicaps/pb/caps.proto";
 import "github.com/tonistiigi/fsutil/types/stat.proto";
 
+
 option (gogoproto.sizer_all) = true;
 option (gogoproto.marshaler_all) = true;
 option (gogoproto.unmarshaler_all) = true;
@@ -176,6 +177,8 @@ message WarnRequest {
 	string Digest = 1 [(gogoproto.customtype) = "github.com/opencontainers/go-digest.Digest", (gogoproto.nullable) = false];
 	int64 Level = 2;
 	bytes Message = 3;
+	pb.SourceInfo info = 4;
+	repeated pb.Range ranges = 5;
 }
 
 message WarnResponse{}
diff --git a/solver/llbsolver/bridge.go b/solver/llbsolver/bridge.go
index 87ac7e62e0ee..6689170db327 100644
--- a/solver/llbsolver/bridge.go
+++ b/solver/llbsolver/bridge.go
@@ -39,16 +39,22 @@ type llbBridge struct {
 	sm                        *session.Manager
 }
 
-func (b *llbBridge) Warn(ctx context.Context, dgst digest.Digest, level int, msg string) error {
+func (b *llbBridge) Warn(ctx context.Context, dgst digest.Digest, msg string, opts frontend.WarnOpts) error {
 	return b.builder.InContext(ctx, func(ctx context.Context, g session.Group) error {
 		pw, ok, _ := progress.NewFromContext(ctx, progress.WithMetadata("vertex", dgst))
 		if !ok {
 			return nil
 		}
+		level := opts.Level
+		if level == 0 {
+			level = 1
+		}
 		pw.Write(identity.NewID(), client.VertexWarning{
-			Vertex:  dgst,
-			Level:   level,
-			Message: []byte(msg),
+			Vertex:     dgst,
+			Level:      level,
+			Message:    []byte(msg),
+			SourceInfo: opts.SourceInfo,
+			Range:      opts.Range,
 		})
 		return pw.Close()
 	})

From 50963e289ebb8a1e9c444a35538fa7f53af38e8b Mon Sep 17 00:00:00 2001
From: Tonis Tiigi <tonistiigi@gmail.com>
Date: Tue, 30 Nov 2021 21:07:02 -0800
Subject: [PATCH 2/6] dockerfile: show redirect parser warnings

Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>
---
 client/llb/marshal.go                         | 18 ++++++++++
 frontend/dockerfile/builder/build.go          | 35 +++++++++++++++++++
 frontend/dockerfile/dockerfile2llb/convert.go |  5 +++
 frontend/dockerfile/parser/parser.go          | 25 ++++++++-----
 4 files changed, 75 insertions(+), 8 deletions(-)

diff --git a/client/llb/marshal.go b/client/llb/marshal.go
index c9c9f5e27103..e59e560ee95c 100644
--- a/client/llb/marshal.go
+++ b/client/llb/marshal.go
@@ -39,6 +39,24 @@ func (def *Definition) FromPB(x *pb.Definition) {
 	}
 }
 
+func (def *Definition) Head() (digest.Digest, error) {
+	if len(def.Def) == 0 {
+		return "", nil
+	}
+
+	last := def.Def[len(def.Def)-1]
+
+	var pop pb.Op
+	if err := (&pop).Unmarshal(last); err != nil {
+		return "", err
+	}
+	if len(pop.Inputs) == 0 {
+		return "", nil
+	}
+
+	return pop.Inputs[0].Digest, nil
+}
+
 func WriteTo(def *Definition, w io.Writer) error {
 	b, err := def.ToPB().Marshal()
 	if err != nil {
diff --git a/frontend/dockerfile/builder/build.go b/frontend/dockerfile/builder/build.go
index 329c87a6b1cd..395cd339a831 100644
--- a/frontend/dockerfile/builder/build.go
+++ b/frontend/dockerfile/builder/build.go
@@ -264,6 +264,11 @@ func Build(ctx context.Context, c client.Client) (*client.Result, error) {
 		return nil, errors.Wrapf(err, "failed to marshal local source")
 	}
 
+	defVtx, err := def.Head()
+	if err != nil {
+		return nil, err
+	}
+
 	var sourceMap *llb.SourceMap
 
 	eg, ctx2 := errgroup.WithContext(ctx)
@@ -426,6 +431,7 @@ func Build(ctx context.Context, c client.Client) (*client.Result, error) {
 						err = wrapSource(err, sourceMap, el.Location)
 					}
 				}()
+
 				st, img, err := dockerfile2llb.Dockerfile2LLB(ctx, dtDockerfile, dockerfile2llb.ConvertOpt{
 					Target:            opts[keyTarget],
 					MetaResolver:      c,
@@ -449,6 +455,12 @@ func Build(ctx context.Context, c client.Client) (*client.Result, error) {
 					LLBCaps:           &caps,
 					SourceMap:         sourceMap,
 					Hostname:          opts[keyHostname],
+					Warn: func(msg string, location *parser.Range) {
+						if i != 0 {
+							return
+						}
+						c.Warn(ctx, defVtx, msg, warnOpts(sourceMap, location))
+					},
 				})
 
 				if err != nil {
@@ -767,6 +779,29 @@ func scopeToSubDir(c *llb.State, fileop bool, dir string) *llb.State {
 	return &bc
 }
 
+func warnOpts(sm *llb.SourceMap, r *parser.Range) client.WarnOpts {
+	opts := client.WarnOpts{Level: 1}
+	if r == nil {
+		return opts
+	}
+	opts.SourceInfo = &pb.SourceInfo{
+		Data:       sm.Data,
+		Filename:   sm.Filename,
+		Definition: sm.Definition.ToPB(),
+	}
+	opts.Range = []*pb.Range{{
+		Start: pb.Position{
+			Line:      int32(r.Start.Line),
+			Character: int32(r.Start.Character),
+		},
+		End: pb.Position{
+			Line:      int32(r.End.Line),
+			Character: int32(r.End.Character),
+		},
+	}}
+	return opts
+}
+
 func wrapSource(err error, sm *llb.SourceMap, ranges []parser.Range) error {
 	if sm == nil {
 		return err
diff --git a/frontend/dockerfile/dockerfile2llb/convert.go b/frontend/dockerfile/dockerfile2llb/convert.go
index 0a95a2f8a5be..997d95ad57e9 100644
--- a/frontend/dockerfile/dockerfile2llb/convert.go
+++ b/frontend/dockerfile/dockerfile2llb/convert.go
@@ -68,6 +68,7 @@ type ConvertOpt struct {
 	ContextLocalName  string
 	SourceMap         *llb.SourceMap
 	Hostname          string
+	Warn              func(msg string, location *parser.Range)
 }
 
 func Dockerfile2LLB(ctx context.Context, dt []byte, opt ConvertOpt) (*llb.State, *Image, error) {
@@ -91,6 +92,10 @@ func Dockerfile2LLB(ctx context.Context, dt []byte, opt ConvertOpt) (*llb.State,
 		return nil, nil, err
 	}
 
+	for _, w := range dockerfile.Warnings {
+		opt.Warn(w.Message, w.Location)
+	}
+
 	proxyEnv := proxyEnvFromBuildArgs(opt.BuildArgs)
 
 	stages, metaArgs, err := instructions.Parse(dockerfile.AST)
diff --git a/frontend/dockerfile/parser/parser.go b/frontend/dockerfile/parser/parser.go
index d1bfc346394c..fbc6a4250d0c 100644
--- a/frontend/dockerfile/parser/parser.go
+++ b/frontend/dockerfile/parser/parser.go
@@ -269,7 +269,12 @@ func newNodeFromLine(line string, d *directives, comments []string) (*Node, erro
 type Result struct {
 	AST         *Node
 	EscapeToken rune
-	Warnings    []string
+	Warnings    []Warning
+}
+
+type Warning struct {
+	Message  string
+	Location *Range
 }
 
 // PrintWarnings to the writer
@@ -277,7 +282,12 @@ func (r *Result) PrintWarnings(out io.Writer) {
 	if len(r.Warnings) == 0 {
 		return
 	}
-	fmt.Fprintf(out, strings.Join(r.Warnings, "\n")+"\n")
+	for _, w := range r.Warnings {
+		fmt.Fprintf(out, "[WARNING]: %s\n", w.Message)
+	}
+	if len(r.Warnings) > 0 {
+		fmt.Fprintf(out, "[WARNING]: Empty continuation lines will become errors in a future release.\n")
+	}
 }
 
 // Parse reads lines from a Reader, parses the lines into an AST and returns
@@ -288,7 +298,7 @@ func Parse(rwc io.Reader) (*Result, error) {
 	root := &Node{StartLine: -1}
 	scanner := bufio.NewScanner(rwc)
 	scanner.Split(scanLines)
-	warnings := []string{}
+	warnings := []Warning{}
 	var comments []string
 
 	var err error
@@ -341,7 +351,10 @@ func Parse(rwc io.Reader) (*Result, error) {
 		}
 
 		if hasEmptyContinuationLine {
-			warnings = append(warnings, "[WARNING]: Empty continuation line found in:\n    "+line)
+			warnings = append(warnings, Warning{
+				Message:  "Empty continuation line found in: " + line,
+				Location: &Range{Start: Position{Line: currentLine}, End: Position{Line: currentLine}},
+			})
 		}
 
 		child, err := newNodeFromLine(line, d, comments)
@@ -384,10 +397,6 @@ func Parse(rwc io.Reader) (*Result, error) {
 		comments = nil
 	}
 
-	if len(warnings) > 0 {
-		warnings = append(warnings, "[WARNING]: Empty continuation lines will become errors in a future release.")
-	}
-
 	if root.StartLine < 0 {
 		return nil, withLocation(errors.New("file with no instructions"), currentLine, 0)
 	}

From d100814aaddd9174a9135c835a9029cbeb9154e1 Mon Sep 17 00:00:00 2001
From: Tonis Tiigi <tonistiigi@gmail.com>
Date: Tue, 30 Nov 2021 21:10:05 -0800
Subject: [PATCH 3/6] progressui: show warnings

Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>
---
 util/progress/progressui/display.go | 21 +++++++++++++++++++++
 util/progress/progressui/printer.go |  5 +++++
 2 files changed, 26 insertions(+)

diff --git a/util/progress/progressui/display.go b/util/progress/progressui/display.go
index cc684b597261..c6c723feeb7c 100644
--- a/util/progress/progressui/display.go
+++ b/util/progress/progressui/display.go
@@ -140,6 +140,9 @@ type vertex struct {
 	count         int
 	statusUpdates map[string]struct{}
 
+	warnings   []client.VertexWarning
+	warningIdx int
+
 	jobs      []*job
 	jobCached bool
 
@@ -255,6 +258,14 @@ func (t *trace) update(s *client.SolveStatus, termWidth int) {
 		t.updates[v.Digest] = struct{}{}
 		v.update(1)
 	}
+	for _, w := range s.Warnings {
+		v, ok := t.byDigest[w.Vertex]
+		if !ok {
+			continue // shouldn't happen
+		}
+		v.warnings = append(v.warnings, *w)
+		v.update(1)
+	}
 	for _, l := range s.Logs {
 		v, ok := t.byDigest[l.Vertex]
 		if !ok {
@@ -369,6 +380,16 @@ func (t *trace) displayInfo() (d displayInfo) {
 			}
 			jobs = append(jobs, j)
 		}
+		for _, w := range v.warnings {
+			msg := "WARN: " + string(w.Message)
+			j := &job{
+				startTime:     addTime(v.Started, t.localTimeDiff),
+				completedTime: addTime(v.Completed, t.localTimeDiff),
+				name:          msg,
+				isCanceled:    true,
+			}
+			jobs = append(jobs, j)
+		}
 		d.jobs = append(d.jobs, jobs...)
 		v.jobs = jobs
 		v.jobCached = true
diff --git a/util/progress/progressui/printer.go b/util/progress/progressui/printer.go
index 11014eb51c55..f02d53c0e70a 100644
--- a/util/progress/progressui/printer.go
+++ b/util/progress/progressui/printer.go
@@ -125,6 +125,11 @@ func (p *textMux) printVtx(t *trace, dgst digest.Digest) {
 	}
 	v.statusUpdates = map[string]struct{}{}
 
+	for _, w := range v.warnings[v.warningIdx:] {
+		fmt.Fprintf(p.w, "#%d WARN: %s\n", v.index, w.Message)
+		v.warningIdx++
+	}
+
 	for i, l := range v.logs {
 		if i == 0 {
 			l = l[v.logsOffset:]

From 0dd260bcf5296c50dbef43fcc763eb62af3d539a Mon Sep 17 00:00:00 2001
From: Tonis Tiigi <tonistiigi@gmail.com>
Date: Tue, 30 Nov 2021 21:20:00 -0800
Subject: [PATCH 4/6] progessui: return warnings from printer

Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>
---
 examples/build-using-dockerfile/main.go |  3 ++-
 util/progress/progressui/display.go     | 16 ++++++++++++----
 util/progress/progresswriter/printer.go |  2 +-
 3 files changed, 15 insertions(+), 6 deletions(-)

diff --git a/examples/build-using-dockerfile/main.go b/examples/build-using-dockerfile/main.go
index 464b8dbc1147..2ddde7088a55 100644
--- a/examples/build-using-dockerfile/main.go
+++ b/examples/build-using-dockerfile/main.go
@@ -107,7 +107,8 @@ func action(clicontext *cli.Context) error {
 			c = cn
 		}
 		// not using shared context to not disrupt display but let is finish reporting errors
-		return progressui.DisplaySolveStatus(context.TODO(), "", c, os.Stdout, ch)
+		_, err = progressui.DisplaySolveStatus(context.TODO(), "", c, os.Stdout, ch)
+		return err
 	})
 	eg.Go(func() error {
 		if err := loadDockerTar(pipeR); err != nil {
diff --git a/util/progress/progressui/display.go b/util/progress/progressui/display.go
index c6c723feeb7c..13af8e38cbe3 100644
--- a/util/progress/progressui/display.go
+++ b/util/progress/progressui/display.go
@@ -21,7 +21,7 @@ import (
 	"golang.org/x/time/rate"
 )
 
-func DisplaySolveStatus(ctx context.Context, phase string, c console.Console, w io.Writer, ch chan *client.SolveStatus) error {
+func DisplaySolveStatus(ctx context.Context, phase string, c console.Console, w io.Writer, ch chan *client.SolveStatus) ([]client.VertexWarning, error) {
 	modeConsole := c != nil
 
 	disp := &display{c: c, phase: phase}
@@ -57,7 +57,7 @@ func DisplaySolveStatus(ctx context.Context, phase string, c console.Console, w
 	for {
 		select {
 		case <-ctx.Done():
-			return ctx.Err()
+			return nil, ctx.Err()
 		case <-ticker.C:
 		case ss, ok := <-ch:
 			if ok {
@@ -72,7 +72,7 @@ func DisplaySolveStatus(ctx context.Context, phase string, c console.Console, w
 			if done {
 				disp.print(t.displayInfo(), width, height, true)
 				t.printErrorLogs(c)
-				return nil
+				return t.warnings(), nil
 			} else if displayLimiter.Allow() {
 				ticker.Stop()
 				ticker = time.NewTicker(tickerTimeout)
@@ -83,7 +83,7 @@ func DisplaySolveStatus(ctx context.Context, phase string, c console.Console, w
 				printer.print(t)
 				if done {
 					t.printErrorLogs(w)
-					return nil
+					return t.warnings(), nil
 				}
 				ticker.Stop()
 				ticker = time.NewTicker(tickerTimeout)
@@ -172,6 +172,14 @@ func newTrace(w io.Writer, modeConsole bool) *trace {
 	}
 }
 
+func (t *trace) warnings() []client.VertexWarning {
+	var out []client.VertexWarning
+	for _, v := range t.vertexes {
+		out = append(out, v.warnings...)
+	}
+	return out
+}
+
 func (t *trace) triggerVertexEvent(v *client.Vertex) {
 	if v.Started == nil {
 		return
diff --git a/util/progress/progresswriter/printer.go b/util/progress/progresswriter/printer.go
index 037123dfc1a6..c96c4525ac20 100644
--- a/util/progress/progresswriter/printer.go
+++ b/util/progress/progresswriter/printer.go
@@ -87,7 +87,7 @@ func NewPrinter(ctx context.Context, out console.File, mode string) (Writer, err
 
 	go func() {
 		// not using shared context to not disrupt display but let is finish reporting errors
-		pw.err = progressui.DisplaySolveStatus(ctx, "", c, out, statusCh)
+		_, pw.err = progressui.DisplaySolveStatus(ctx, "", c, out, statusCh)
 		close(doneCh)
 	}()
 	return pw, nil

From 71316c6f29627e3d67735b289d5e81b56665cb0e Mon Sep 17 00:00:00 2001
From: Tonis Tiigi <tonistiigi@gmail.com>
Date: Tue, 30 Nov 2021 21:57:43 -0800
Subject: [PATCH 5/6] split warning message into short and detail

Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>
---
 api/services/control/control.pb.go            | 276 ++++++++------
 api/services/control/control.proto            |   7 +-
 client/build_test.go                          |   4 +-
 client/graph.go                               |   3 +-
 client/solve.go                               |   3 +-
 control/control.go                            |   3 +-
 frontend/dockerfile/builder/build.go          |   8 +-
 frontend/dockerfile/dockerfile2llb/convert.go |   4 +-
 frontend/dockerfile/parser/parser.go          |   8 +-
 frontend/dockerfile/parser/parser_test.go     |  10 +-
 frontend/gateway/client/client.go             |   1 +
 frontend/gateway/gateway.go                   |   3 +-
 frontend/gateway/grpcclient/client.go         |  11 +-
 frontend/gateway/pb/gateway.pb.go             | 338 ++++++++++--------
 frontend/gateway/pb/gateway.proto             |   7 +-
 solver/llbsolver/bridge.go                    |   3 +-
 util/progress/progressui/display.go           |   2 +-
 util/progress/progressui/printer.go           |   2 +-
 18 files changed, 407 insertions(+), 286 deletions(-)

diff --git a/api/services/control/control.pb.go b/api/services/control/control.pb.go
index 2e099606a7f8..d640445575f3 100644
--- a/api/services/control/control.pb.go
+++ b/api/services/control/control.pb.go
@@ -1006,9 +1006,10 @@ func (m *VertexLog) GetMsg() []byte {
 type VertexWarning struct {
 	Vertex               github_com_opencontainers_go_digest.Digest `protobuf:"bytes,1,opt,name=vertex,proto3,customtype=github.com/opencontainers/go-digest.Digest" json:"vertex"`
 	Level                int64                                      `protobuf:"varint,2,opt,name=level,proto3" json:"level,omitempty"`
-	Msg                  []byte                                     `protobuf:"bytes,3,opt,name=msg,proto3" json:"msg,omitempty"`
-	Info                 *pb.SourceInfo                             `protobuf:"bytes,4,opt,name=info,proto3" json:"info,omitempty"`
-	Ranges               []*pb.Range                                `protobuf:"bytes,5,rep,name=ranges,proto3" json:"ranges,omitempty"`
+	Short                []byte                                     `protobuf:"bytes,3,opt,name=short,proto3" json:"short,omitempty"`
+	Detail               []byte                                     `protobuf:"bytes,4,opt,name=detail,proto3" json:"detail,omitempty"`
+	Info                 *pb.SourceInfo                             `protobuf:"bytes,5,opt,name=info,proto3" json:"info,omitempty"`
+	Ranges               []*pb.Range                                `protobuf:"bytes,6,rep,name=ranges,proto3" json:"ranges,omitempty"`
 	XXX_NoUnkeyedLiteral struct{}                                   `json:"-"`
 	XXX_unrecognized     []byte                                     `json:"-"`
 	XXX_sizecache        int32                                      `json:"-"`
@@ -1054,9 +1055,16 @@ func (m *VertexWarning) GetLevel() int64 {
 	return 0
 }
 
-func (m *VertexWarning) GetMsg() []byte {
+func (m *VertexWarning) GetShort() []byte {
 	if m != nil {
-		return m.Msg
+		return m.Short
+	}
+	return nil
+}
+
+func (m *VertexWarning) GetDetail() []byte {
+	if m != nil {
+		return m.Detail
 	}
 	return nil
 }
@@ -1245,101 +1253,102 @@ func init() {
 func init() { proto.RegisterFile("control.proto", fileDescriptor_0c5120591600887d) }
 
 var fileDescriptor_0c5120591600887d = []byte{
-	// 1494 bytes of a gzipped FileDescriptorProto
-	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0xac, 0x57, 0x4d, 0x6f, 0x1b, 0x45,
-	0x18, 0xee, 0xda, 0xf1, 0xd7, 0x1b, 0x27, 0x4a, 0xa7, 0xa5, 0x5a, 0x2d, 0x22, 0x49, 0xb7, 0x45,
-	0xb2, 0xaa, 0x76, 0x9d, 0x1a, 0x8a, 0x4a, 0xf8, 0x50, 0xeb, 0xb8, 0xa8, 0xa9, 0x1a, 0x51, 0xc6,
-	0x2d, 0x95, 0x7a, 0x40, 0x5a, 0xdb, 0x63, 0x77, 0x95, 0xf5, 0xce, 0x32, 0x33, 0x9b, 0xd6, 0xfc,
-	0x00, 0xce, 0xdc, 0xf8, 0x01, 0x1c, 0x38, 0x71, 0xe6, 0x17, 0x20, 0x55, 0x9c, 0x38, 0xf7, 0x10,
-	0x50, 0xef, 0x20, 0x7e, 0x02, 0x9a, 0x8f, 0x75, 0xd6, 0xb1, 0x9d, 0xaf, 0x72, 0xf2, 0xbc, 0xb3,
-	0xef, 0xf3, 0xf8, 0xfd, 0x9c, 0x99, 0x17, 0x96, 0xba, 0x34, 0x12, 0x8c, 0x86, 0x5e, 0xcc, 0xa8,
-	0xa0, 0x68, 0x65, 0x48, 0x3b, 0x23, 0xaf, 0x93, 0x04, 0x61, 0x6f, 0x37, 0x10, 0xde, 0xde, 0x4d,
-	0xe7, 0xc6, 0x20, 0x10, 0xcf, 0x93, 0x8e, 0xd7, 0xa5, 0xc3, 0xfa, 0x80, 0x0e, 0x68, 0x5d, 0x29,
-	0x76, 0x92, 0xbe, 0x92, 0x94, 0xa0, 0x56, 0x9a, 0xc0, 0x59, 0x1b, 0x50, 0x3a, 0x08, 0xc9, 0x81,
-	0x96, 0x08, 0x86, 0x84, 0x0b, 0x7f, 0x18, 0x1b, 0x85, 0xeb, 0x19, 0x3e, 0xf9, 0x67, 0xf5, 0xf4,
-	0xcf, 0xea, 0x9c, 0x86, 0x7b, 0x84, 0xd5, 0xe3, 0x4e, 0x9d, 0xc6, 0xdc, 0x68, 0xd7, 0xe7, 0x6a,
-	0xfb, 0x71, 0x50, 0x17, 0xa3, 0x98, 0xf0, 0xfa, 0x0b, 0xca, 0x76, 0x09, 0xd3, 0x00, 0xf7, 0x7b,
-	0x0b, 0xaa, 0x8f, 0x58, 0x12, 0x11, 0x4c, 0xbe, 0x4d, 0x08, 0x17, 0xe8, 0x12, 0x14, 0xfb, 0x41,
-	0x28, 0x08, 0xb3, 0xad, 0xf5, 0x7c, 0xad, 0x82, 0x8d, 0x84, 0x56, 0x20, 0xef, 0x87, 0xa1, 0x9d,
-	0x5b, 0xb7, 0x6a, 0x65, 0x2c, 0x97, 0xa8, 0x06, 0xd5, 0x5d, 0x42, 0xe2, 0x56, 0xc2, 0x7c, 0x11,
-	0xd0, 0xc8, 0xce, 0xaf, 0x5b, 0xb5, 0x7c, 0x73, 0xe1, 0xd5, 0xfe, 0x9a, 0x85, 0x27, 0xbe, 0x20,
-	0x17, 0x2a, 0x52, 0x6e, 0x8e, 0x04, 0xe1, 0xf6, 0x42, 0x46, 0xed, 0x60, 0xdb, 0xbd, 0x06, 0x2b,
-	0xad, 0x80, 0xef, 0x3e, 0xe1, 0xfe, 0xe0, 0x38, 0x5b, 0xdc, 0x07, 0x70, 0x3e, 0xa3, 0xcb, 0x63,
-	0x1a, 0x71, 0x82, 0x6e, 0x41, 0x91, 0x91, 0x2e, 0x65, 0x3d, 0xa5, 0xbc, 0xd8, 0x78, 0xcf, 0x3b,
-	0x9c, 0x1b, 0xcf, 0x00, 0xa4, 0x12, 0x36, 0xca, 0xee, 0x8f, 0x79, 0x58, 0xcc, 0xec, 0xa3, 0x65,
-	0xc8, 0x6d, 0xb7, 0x6c, 0x6b, 0xdd, 0xaa, 0x55, 0x70, 0x6e, 0xbb, 0x85, 0x6c, 0x28, 0xed, 0x24,
-	0xc2, 0xef, 0x84, 0xc4, 0xf8, 0x9e, 0x8a, 0xe8, 0x22, 0x14, 0xb6, 0xa3, 0x27, 0x9c, 0x28, 0xc7,
-	0xcb, 0x58, 0x0b, 0x08, 0xc1, 0x42, 0x3b, 0xf8, 0x8e, 0x68, 0x37, 0xb1, 0x5a, 0x23, 0x07, 0x8a,
-	0x8f, 0x7c, 0x46, 0x22, 0x61, 0x17, 0x24, 0x6f, 0x33, 0x67, 0x5b, 0xd8, 0xec, 0xa0, 0x26, 0x54,
-	0xb6, 0x18, 0xf1, 0x05, 0xe9, 0xdd, 0x15, 0x76, 0x71, 0xdd, 0xaa, 0x2d, 0x36, 0x1c, 0x4f, 0x17,
-	0x85, 0x97, 0x16, 0x85, 0xf7, 0x38, 0x2d, 0x8a, 0x66, 0xf9, 0xd5, 0xfe, 0xda, 0xb9, 0x1f, 0xfe,
-	0x94, 0xb1, 0x1b, 0xc3, 0xd0, 0x1d, 0x80, 0x87, 0x3e, 0x17, 0x4f, 0xb8, 0x22, 0x29, 0x1d, 0x4b,
-	0xb2, 0xa0, 0x08, 0x32, 0x18, 0xb4, 0x0a, 0xa0, 0x82, 0xb0, 0x45, 0x93, 0x48, 0xd8, 0x65, 0x65,
-	0x7b, 0x66, 0x07, 0xad, 0xc3, 0x62, 0x8b, 0xf0, 0x2e, 0x0b, 0x62, 0x95, 0xea, 0x8a, 0x0a, 0x4f,
-	0x76, 0x4b, 0x32, 0xe8, 0x08, 0x3e, 0x1e, 0xc5, 0xc4, 0x06, 0xa5, 0x90, 0xd9, 0x91, 0xb9, 0x6c,
-	0x3f, 0xf7, 0x19, 0xe9, 0xd9, 0x8b, 0x2a, 0x5c, 0x46, 0x92, 0xf1, 0xd5, 0x91, 0xe0, 0x76, 0x55,
-	0x25, 0x39, 0x15, 0xdd, 0x9f, 0x8a, 0x50, 0x6d, 0xcb, 0x1a, 0x4f, 0xcb, 0x61, 0x05, 0xf2, 0x98,
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+	0x9d, 0x01, 0x6e, 0x30, 0xee, 0x43, 0x70, 0x67, 0x9b, 0x7c, 0x96, 0x12, 0xf0, 0x7e, 0xb4, 0xe0,
+	0xe2, 0xc4, 0x1f, 0xc9, 0x5b, 0x43, 0x9d, 0x9b, 0x9a, 0x42, 0xad, 0x51, 0x13, 0x4a, 0xba, 0xf3,
+	0x0b, 0xca, 0x60, 0xff, 0x14, 0x06, 0xfb, 0xb9, 0xb6, 0xd7, 0x60, 0xf7, 0x2e, 0xc0, 0xf9, 0x8a,
+	0xd5, 0xfb, 0xd9, 0x82, 0x05, 0xd3, 0x65, 0xe6, 0x8a, 0x0d, 0x60, 0x29, 0x6b, 0xa1, 0x6c, 0xcf,
+	0x5c, 0xb6, 0x77, 0x66, 0x36, 0xa8, 0x56, 0xf3, 0x8f, 0xe2, 0xb4, 0x8d, 0x13, 0x74, 0xee, 0x56,
+	0x56, 0x57, 0x47, 0x54, 0xcf, 0x64, 0xf9, 0x55, 0x58, 0x68, 0x89, 0x40, 0xa4, 0x7c, 0xe6, 0xcd,
+	0xe1, 0xfd, 0x6d, 0xc1, 0x62, 0xa6, 0x63, 0xbc, 0x7b, 0x1f, 0x2a, 0xfb, 0x84, 0x09, 0xf2, 0x8a,
+	0x70, 0xe3, 0x95, 0x33, 0xe9, 0xd5, 0x97, 0x4a, 0x03, 0x8f, 0x34, 0xd1, 0x26, 0x54, 0xb8, 0xe2,
+	0x21, 0x59, 0xa2, 0x96, 0x67, 0xa1, 0xcc, 0xff, 0x8d, 0xf4, 0x51, 0x1d, 0xe6, 0x22, 0xda, 0xe7,
+	0xa6, 0x67, 0xfe, 0x3b, 0x0b, 0xf7, 0x98, 0xf6, 0xb1, 0x52, 0x44, 0x1f, 0x41, 0xe5, 0x65, 0xc0,
+	0xe2, 0x30, 0xee, 0x67, 0x5d, 0xb0, 0x32, 0x0b, 0xf4, 0x5c, 0xeb, 0xe1, 0x11, 0xc0, 0x3b, 0x28,
+	0x80, 0xad, 0xbf, 0xa1, 0x47, 0x60, 0x77, 0xc3, 0x3e, 0xe1, 0x42, 0x87, 0xa4, 0xb1, 0x21, 0x0f,
+	0xf9, 0x37, 0x07, 0x2b, 0x37, 0x72, 0xa7, 0x38, 0x4d, 0x48, 0x2c, 0x1f, 0xbb, 0x41, 0x18, 0x13,
+	0xc6, 0xeb, 0x7d, 0x7a, 0x4b, 0x43, 0xfc, 0xa6, 0xfa, 0xc1, 0x86, 0x41, 0x72, 0x85, 0xfa, 0xac,
+	0x56, 0xe7, 0xc5, 0xf9, 0xb8, 0x34, 0x83, 0x6c, 0x83, 0x38, 0x18, 0x10, 0x73, 0x37, 0xab, 0xb5,
+	0x7c, 0x38, 0x74, 0x64, 0x9d, 0x77, 0xd5, 0x93, 0xaa, 0x82, 0x8d, 0x84, 0x36, 0xa1, 0xcc, 0x45,
+	0xc0, 0xe4, 0x99, 0x53, 0x3a, 0xe5, 0x8b, 0x27, 0x03, 0xa0, 0x4f, 0xa1, 0xda, 0xa1, 0x83, 0x24,
+	0x22, 0x12, 0x6d, 0x9f, 0x12, 0x7d, 0x08, 0x91, 0xa5, 0x47, 0x18, 0xa3, 0x4c, 0xbd, 0xb5, 0xaa,
+	0x58, 0x0b, 0xde, 0x5f, 0x05, 0xa8, 0xe5, 0x33, 0x3d, 0xf1, 0x96, 0x7c, 0x04, 0xb6, 0xae, 0x1b,
+	0x5d, 0xb2, 0xe7, 0x0b, 0x95, 0x66, 0x98, 0x1a, 0x2a, 0x07, 0xca, 0x9d, 0x94, 0xa9, 0x87, 0xa6,
+	0x7e, 0x7e, 0x66, 0xa2, 0x34, 0x58, 0x50, 0x11, 0x44, 0x2a, 0x54, 0x45, 0xac, 0x05, 0xf9, 0xf6,
+	0x1c, 0x8d, 0x1b, 0x67, 0x7b, 0x7b, 0x8e, 0x60, 0xf9, 0x34, 0x94, 0xdf, 0x29, 0x0d, 0x95, 0x33,
+	0xa7, 0xc1, 0xfb, 0xc5, 0x82, 0xea, 0xa8, 0x45, 0x72, 0xd1, 0xb5, 0xde, 0x39, 0xba, 0x63, 0x91,
+	0x29, 0x9c, 0x2f, 0x32, 0x57, 0xc0, 0xe6, 0x82, 0x91, 0x60, 0xa0, 0x27, 0x23, 0x6c, 0x24, 0x79,
+	0x18, 0x0d, 0x78, 0x5f, 0x65, 0xa8, 0x86, 0xe5, 0xd2, 0xfb, 0xc3, 0x82, 0x85, 0xb1, 0xae, 0xfd,
+	0x57, 0x7d, 0xb9, 0x0c, 0xa5, 0x88, 0xec, 0x13, 0x3d, 0xbb, 0x15, 0xb1, 0x16, 0xe4, 0x2e, 0xdf,
+	0xa5, 0x4c, 0x28, 0xe3, 0x6a, 0x58, 0x0b, 0xd2, 0xe6, 0x2e, 0x11, 0x41, 0x18, 0x19, 0xf3, 0x8c,
+	0x84, 0x3c, 0x98, 0x0b, 0xe3, 0x1e, 0x35, 0x9d, 0xa6, 0x9e, 0x23, 0x2d, 0x9a, 0xb2, 0x0e, 0xd9,
+	0x8e, 0x7b, 0x14, 0xab, 0x6f, 0xe8, 0x2a, 0xd8, 0x2c, 0x88, 0xfb, 0x84, 0x3b, 0xb6, 0x3a, 0x9a,
+	0xaa, 0x52, 0x0b, 0xcb, 0x1d, 0x6c, 0x3e, 0x78, 0x1e, 0xd4, 0xd4, 0xb4, 0xb7, 0x43, 0xb8, 0x9c,
+	0x2d, 0x64, 0x11, 0x77, 0x03, 0x11, 0x28, 0x27, 0x6b, 0x58, 0xad, 0xbd, 0x9b, 0x80, 0x1e, 0x87,
+	0x5c, 0x3c, 0x57, 0x53, 0x2a, 0x3f, 0x69, 0x14, 0x6c, 0xc1, 0xa5, 0x31, 0x6d, 0x73, 0x96, 0x7f,
+	0x7c, 0x64, 0x18, 0xbc, 0x3e, 0x79, 0x4c, 0xaa, 0x61, 0xd8, 0xd7, 0xc0, 0xf1, 0x99, 0x70, 0xe3,
+	0xcf, 0x22, 0x94, 0xb7, 0xf4, 0x9c, 0x8f, 0x9e, 0x42, 0x75, 0x34, 0x6b, 0x22, 0x6f, 0x92, 0xe6,
+	0xe8, 0xd0, 0xea, 0x5e, 0x3b, 0x56, 0xc7, 0xd8, 0xf7, 0x10, 0x4a, 0x6a, 0xea, 0x46, 0x53, 0x2e,
+	0x8b, 0xfc, 0x38, 0xee, 0x1e, 0x3f, 0xc5, 0xae, 0x5b, 0x92, 0x49, 0xdd, 0xb4, 0xd3, 0x98, 0xf2,
+	0x6f, 0x64, 0x77, 0xe5, 0x84, 0x2b, 0x1a, 0xed, 0x80, 0x6d, 0xce, 0xad, 0x69, 0xaa, 0xf9, 0xfb,
+	0xd4, 0x5d, 0x9d, 0xad, 0xa0, 0xc9, 0xd6, 0x2d, 0xb4, 0x33, 0x1a, 0x7b, 0xa6, 0x99, 0x96, 0x2f,
+	0x03, 0xf7, 0x84, 0xef, 0x6b, 0xd6, 0xba, 0x85, 0x5e, 0xc0, 0x7c, 0x2e, 0xd1, 0x68, 0x4a, 0x42,
+	0x27, 0xab, 0xc6, 0xfd, 0xff, 0x09, 0x5a, 0xda, 0xd8, 0x46, 0xed, 0xf5, 0xdb, 0x65, 0xeb, 0xd7,
+	0xb7, 0xcb, 0xd6, 0xef, 0x6f, 0x97, 0xad, 0xb6, 0xad, 0x1a, 0xfc, 0xbd, 0x7f, 0x02, 0x00, 0x00,
+	0xff, 0xff, 0x7c, 0xcd, 0xb2, 0x7e, 0xeb, 0x11, 0x00, 0x00,
 }
 
 // Reference imports to suppress errors if they are not otherwise used.
@@ -2662,7 +2671,7 @@ func (m *VertexWarning) MarshalToSizedBuffer(dAtA []byte) (int, error) {
 				i = encodeVarintControl(dAtA, i, uint64(size))
 			}
 			i--
-			dAtA[i] = 0x2a
+			dAtA[i] = 0x32
 		}
 	}
 	if m.Info != nil {
@@ -2675,12 +2684,19 @@ func (m *VertexWarning) MarshalToSizedBuffer(dAtA []byte) (int, error) {
 			i = encodeVarintControl(dAtA, i, uint64(size))
 		}
 		i--
+		dAtA[i] = 0x2a
+	}
+	if len(m.Detail) > 0 {
+		i -= len(m.Detail)
+		copy(dAtA[i:], m.Detail)
+		i = encodeVarintControl(dAtA, i, uint64(len(m.Detail)))
+		i--
 		dAtA[i] = 0x22
 	}
-	if len(m.Msg) > 0 {
-		i -= len(m.Msg)
-		copy(dAtA[i:], m.Msg)
-		i = encodeVarintControl(dAtA, i, uint64(len(m.Msg)))
+	if len(m.Short) > 0 {
+		i -= len(m.Short)
+		copy(dAtA[i:], m.Short)
+		i = encodeVarintControl(dAtA, i, uint64(len(m.Short)))
 		i--
 		dAtA[i] = 0x1a
 	}
@@ -3265,7 +3281,11 @@ func (m *VertexWarning) Size() (n int) {
 	if m.Level != 0 {
 		n += 1 + sovControl(uint64(m.Level))
 	}
-	l = len(m.Msg)
+	l = len(m.Short)
+	if l > 0 {
+		n += 1 + l + sovControl(uint64(l))
+	}
+	l = len(m.Detail)
 	if l > 0 {
 		n += 1 + l + sovControl(uint64(l))
 	}
@@ -6473,7 +6493,7 @@ func (m *VertexWarning) Unmarshal(dAtA []byte) error {
 			}
 		case 3:
 			if wireType != 2 {
-				return fmt.Errorf("proto: wrong wireType = %d for field Msg", wireType)
+				return fmt.Errorf("proto: wrong wireType = %d for field Short", wireType)
 			}
 			var byteLen int
 			for shift := uint(0); ; shift += 7 {
@@ -6500,12 +6520,46 @@ func (m *VertexWarning) Unmarshal(dAtA []byte) error {
 			if postIndex > l {
 				return io.ErrUnexpectedEOF
 			}
-			m.Msg = append(m.Msg[:0], dAtA[iNdEx:postIndex]...)
-			if m.Msg == nil {
-				m.Msg = []byte{}
+			m.Short = append(m.Short[:0], dAtA[iNdEx:postIndex]...)
+			if m.Short == nil {
+				m.Short = []byte{}
 			}
 			iNdEx = postIndex
 		case 4:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field Detail", wireType)
+			}
+			var byteLen int
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowControl
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				byteLen |= int(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			if byteLen < 0 {
+				return ErrInvalidLengthControl
+			}
+			postIndex := iNdEx + byteLen
+			if postIndex < 0 {
+				return ErrInvalidLengthControl
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.Detail = append(m.Detail[:0], dAtA[iNdEx:postIndex]...)
+			if m.Detail == nil {
+				m.Detail = []byte{}
+			}
+			iNdEx = postIndex
+		case 5:
 			if wireType != 2 {
 				return fmt.Errorf("proto: wrong wireType = %d for field Info", wireType)
 			}
@@ -6541,7 +6595,7 @@ func (m *VertexWarning) Unmarshal(dAtA []byte) error {
 				return err
 			}
 			iNdEx = postIndex
-		case 5:
+		case 6:
 			if wireType != 2 {
 				return fmt.Errorf("proto: wrong wireType = %d for field Ranges", wireType)
 			}
diff --git a/api/services/control/control.proto b/api/services/control/control.proto
index a6be5dda59bc..388bbcf64f93 100644
--- a/api/services/control/control.proto
+++ b/api/services/control/control.proto
@@ -138,9 +138,10 @@ message VertexLog {
 message VertexWarning {
 	string vertex = 1 [(gogoproto.customtype) = "github.com/opencontainers/go-digest.Digest", (gogoproto.nullable) = false];
 	int64 level = 2;
-	bytes msg = 3;
-	pb.SourceInfo info = 4;
-	repeated pb.Range ranges = 5;
+	bytes short = 3;
+	bytes detail = 4;
+	pb.SourceInfo info = 5;
+	repeated pb.Range ranges = 6;
 }
 
 message BytesMessage {
diff --git a/client/build_test.go b/client/build_test.go
index aed55c6f60b6..65e5c092bf34 100644
--- a/client/build_test.go
+++ b/client/build_test.go
@@ -193,6 +193,7 @@ func testWarnings(t *testing.T, sb integration.Sandbox) {
 			Range: []*pb.Range{
 				{Start: pb.Position{Line: 2}, End: pb.Position{Line: 4}},
 			},
+			Detail: []byte("this is detail"),
 		}))
 
 		return r, nil
@@ -239,7 +240,8 @@ func testWarnings(t *testing.T, sb integration.Sandbox) {
 
 	w := warnings[0]
 
-	require.Equal(t, "this is warning", string(w.Message))
+	require.Equal(t, "this is warning", string(w.Short))
+	require.Equal(t, "this is detail", string(w.Detail))
 	require.Equal(t, 3, w.Level)
 	_, ok := vertexes[w.Vertex]
 	require.True(t, ok)
diff --git a/client/graph.go b/client/graph.go
index 5932d0cf2092..4be88cd6fcf3 100644
--- a/client/graph.go
+++ b/client/graph.go
@@ -38,7 +38,8 @@ type VertexLog struct {
 type VertexWarning struct {
 	Vertex     digest.Digest
 	Level      int
-	Message    []byte
+	Short      []byte
+	Detail     []byte
 	SourceInfo *pb.SourceInfo
 	Range      []*pb.Range
 }
diff --git a/client/solve.go b/client/solve.go
index ded48bfdeac3..c84da439c2fb 100644
--- a/client/solve.go
+++ b/client/solve.go
@@ -296,7 +296,8 @@ func (c *Client) solve(ctx context.Context, def *llb.Definition, runGateway runG
 				s.Warnings = append(s.Warnings, &VertexWarning{
 					Vertex:     v.Vertex,
 					Level:      int(v.Level),
-					Message:    v.Msg,
+					Short:      v.Short,
+					Detail:     v.Detail,
 					SourceInfo: v.Info,
 					Range:      v.Ranges,
 				})
diff --git a/control/control.go b/control/control.go
index ab61b0031995..795644811a59 100644
--- a/control/control.go
+++ b/control/control.go
@@ -380,7 +380,8 @@ func (c *Controller) Status(req *controlapi.StatusRequest, stream controlapi.Con
 					sr.Warnings = append(sr.Warnings, &controlapi.VertexWarning{
 						Vertex: v.Vertex,
 						Level:  int64(v.Level),
-						Msg:    v.Message,
+						Short:  v.Short,
+						Detail: v.Detail,
 						Info:   v.SourceInfo,
 						Ranges: v.Range,
 					})
diff --git a/frontend/dockerfile/builder/build.go b/frontend/dockerfile/builder/build.go
index 395cd339a831..ecb1d90deb76 100644
--- a/frontend/dockerfile/builder/build.go
+++ b/frontend/dockerfile/builder/build.go
@@ -455,11 +455,11 @@ func Build(ctx context.Context, c client.Client) (*client.Result, error) {
 					LLBCaps:           &caps,
 					SourceMap:         sourceMap,
 					Hostname:          opts[keyHostname],
-					Warn: func(msg string, location *parser.Range) {
+					Warn: func(msg, detail string, location *parser.Range) {
 						if i != 0 {
 							return
 						}
-						c.Warn(ctx, defVtx, msg, warnOpts(sourceMap, location))
+						c.Warn(ctx, defVtx, msg, warnOpts(sourceMap, location, detail))
 					},
 				})
 
@@ -779,8 +779,8 @@ func scopeToSubDir(c *llb.State, fileop bool, dir string) *llb.State {
 	return &bc
 }
 
-func warnOpts(sm *llb.SourceMap, r *parser.Range) client.WarnOpts {
-	opts := client.WarnOpts{Level: 1}
+func warnOpts(sm *llb.SourceMap, r *parser.Range, detail string) client.WarnOpts {
+	opts := client.WarnOpts{Level: 1, Detail: []byte(detail)}
 	if r == nil {
 		return opts
 	}
diff --git a/frontend/dockerfile/dockerfile2llb/convert.go b/frontend/dockerfile/dockerfile2llb/convert.go
index 997d95ad57e9..f54cab1ad748 100644
--- a/frontend/dockerfile/dockerfile2llb/convert.go
+++ b/frontend/dockerfile/dockerfile2llb/convert.go
@@ -68,7 +68,7 @@ type ConvertOpt struct {
 	ContextLocalName  string
 	SourceMap         *llb.SourceMap
 	Hostname          string
-	Warn              func(msg string, location *parser.Range)
+	Warn              func(short, detail string, location *parser.Range)
 }
 
 func Dockerfile2LLB(ctx context.Context, dt []byte, opt ConvertOpt) (*llb.State, *Image, error) {
@@ -93,7 +93,7 @@ func Dockerfile2LLB(ctx context.Context, dt []byte, opt ConvertOpt) (*llb.State,
 	}
 
 	for _, w := range dockerfile.Warnings {
-		opt.Warn(w.Message, w.Location)
+		opt.Warn(w.Short, w.Detail, w.Location)
 	}
 
 	proxyEnv := proxyEnvFromBuildArgs(opt.BuildArgs)
diff --git a/frontend/dockerfile/parser/parser.go b/frontend/dockerfile/parser/parser.go
index fbc6a4250d0c..4e4fa65a722d 100644
--- a/frontend/dockerfile/parser/parser.go
+++ b/frontend/dockerfile/parser/parser.go
@@ -273,7 +273,8 @@ type Result struct {
 }
 
 type Warning struct {
-	Message  string
+	Short    string
+	Detail   string
 	Location *Range
 }
 
@@ -283,7 +284,7 @@ func (r *Result) PrintWarnings(out io.Writer) {
 		return
 	}
 	for _, w := range r.Warnings {
-		fmt.Fprintf(out, "[WARNING]: %s\n", w.Message)
+		fmt.Fprintf(out, "[WARNING]: %s\n", w.Short)
 	}
 	if len(r.Warnings) > 0 {
 		fmt.Fprintf(out, "[WARNING]: Empty continuation lines will become errors in a future release.\n")
@@ -352,7 +353,8 @@ func Parse(rwc io.Reader) (*Result, error) {
 
 		if hasEmptyContinuationLine {
 			warnings = append(warnings, Warning{
-				Message:  "Empty continuation line found in: " + line,
+				Short:    "Empty continuation line found in: " + line,
+				Detail:   "Empty continuation lines will become errors in a future release. https://github.com/moby/moby/pull/33719",
 				Location: &Range{Start: Position{Line: currentLine}, End: Position{Line: currentLine}},
 			})
 		}
diff --git a/frontend/dockerfile/parser/parser_test.go b/frontend/dockerfile/parser/parser_test.go
index b6917287d953..89a75089ef25 100644
--- a/frontend/dockerfile/parser/parser_test.go
+++ b/frontend/dockerfile/parser/parser_test.go
@@ -162,11 +162,11 @@ RUN indented \
 	result, err := Parse(dockerfile)
 	require.NoError(t, err)
 	warnings := result.Warnings
-	require.Equal(t, 3, len(warnings))
-	require.Contains(t, warnings[0], "Empty continuation line found in")
-	require.Contains(t, warnings[0], "RUN something     following     more")
-	require.Contains(t, warnings[1], "RUN another     thing")
-	require.Contains(t, warnings[2], "will become errors in a future release")
+	require.Equal(t, 2, len(warnings))
+	require.Contains(t, warnings[0].Short, "Empty continuation line found in")
+	require.Contains(t, warnings[0].Short, "RUN something     following     more")
+	require.Contains(t, warnings[1].Short, "RUN another     thing")
+	require.Contains(t, warnings[0].Detail, "will become errors in a future release")
 }
 
 func TestParseReturnsScannerErrors(t *testing.T) {
diff --git a/frontend/gateway/client/client.go b/frontend/gateway/client/client.go
index 62ebb719270e..8fc74ec59447 100644
--- a/frontend/gateway/client/client.go
+++ b/frontend/gateway/client/client.go
@@ -139,4 +139,5 @@ type WarnOpts struct {
 	Level      int
 	SourceInfo *pb.SourceInfo
 	Range      []*pb.Range
+	Detail     []byte
 }
diff --git a/frontend/gateway/gateway.go b/frontend/gateway/gateway.go
index f44fb9202b5d..a4b6382b494b 100644
--- a/frontend/gateway/gateway.go
+++ b/frontend/gateway/gateway.go
@@ -994,10 +994,11 @@ func (lbf *llbBridgeForwarder) ReleaseContainer(ctx context.Context, in *pb.Rele
 }
 
 func (lbf *llbBridgeForwarder) Warn(ctx context.Context, in *pb.WarnRequest) (*pb.WarnResponse, error) {
-	err := lbf.llbBridge.Warn(ctx, in.Digest, string(in.Message), frontend.WarnOpts{
+	err := lbf.llbBridge.Warn(ctx, in.Digest, string(in.Short), frontend.WarnOpts{
 		Level:      int(in.Level),
 		SourceInfo: in.Info,
 		Range:      in.Ranges,
+		Detail:     in.Detail,
 	})
 	if err != nil {
 		return nil, err
diff --git a/frontend/gateway/grpcclient/client.go b/frontend/gateway/grpcclient/client.go
index 4596e290c3a7..11e8f7db26e7 100644
--- a/frontend/gateway/grpcclient/client.go
+++ b/frontend/gateway/grpcclient/client.go
@@ -300,11 +300,12 @@ func (c *grpcClient) requestForRef(ref client.Reference) (*pb.SolveRequest, erro
 
 func (c *grpcClient) Warn(ctx context.Context, dgst digest.Digest, msg string, opts client.WarnOpts) error {
 	_, err := c.client.Warn(ctx, &pb.WarnRequest{
-		Digest:  dgst,
-		Level:   int64(opts.Level),
-		Message: []byte(msg),
-		Info:    opts.SourceInfo,
-		Ranges:  opts.Range,
+		Digest: dgst,
+		Level:  int64(opts.Level),
+		Short:  []byte(msg),
+		Info:   opts.SourceInfo,
+		Ranges: opts.Range,
+		Detail: opts.Detail,
 	})
 	return err
 }
diff --git a/frontend/gateway/pb/gateway.pb.go b/frontend/gateway/pb/gateway.pb.go
index 94752db4d31b..bda8615c011a 100644
--- a/frontend/gateway/pb/gateway.pb.go
+++ b/frontend/gateway/pb/gateway.pb.go
@@ -1333,9 +1333,10 @@ func (m *PongResponse) GetWorkers() []*types1.WorkerRecord {
 type WarnRequest struct {
 	Digest               github_com_opencontainers_go_digest.Digest `protobuf:"bytes,1,opt,name=Digest,proto3,customtype=github.com/opencontainers/go-digest.Digest" json:"Digest"`
 	Level                int64                                      `protobuf:"varint,2,opt,name=Level,proto3" json:"Level,omitempty"`
-	Message              []byte                                     `protobuf:"bytes,3,opt,name=Message,proto3" json:"Message,omitempty"`
-	Info                 *pb.SourceInfo                             `protobuf:"bytes,4,opt,name=info,proto3" json:"info,omitempty"`
-	Ranges               []*pb.Range                                `protobuf:"bytes,5,rep,name=ranges,proto3" json:"ranges,omitempty"`
+	Short                []byte                                     `protobuf:"bytes,3,opt,name=Short,proto3" json:"Short,omitempty"`
+	Detail               []byte                                     `protobuf:"bytes,4,opt,name=Detail,proto3" json:"Detail,omitempty"`
+	Info                 *pb.SourceInfo                             `protobuf:"bytes,5,opt,name=info,proto3" json:"info,omitempty"`
+	Ranges               []*pb.Range                                `protobuf:"bytes,6,rep,name=ranges,proto3" json:"ranges,omitempty"`
 	XXX_NoUnkeyedLiteral struct{}                                   `json:"-"`
 	XXX_unrecognized     []byte                                     `json:"-"`
 	XXX_sizecache        int32                                      `json:"-"`
@@ -1381,9 +1382,16 @@ func (m *WarnRequest) GetLevel() int64 {
 	return 0
 }
 
-func (m *WarnRequest) GetMessage() []byte {
+func (m *WarnRequest) GetShort() []byte {
 	if m != nil {
-		return m.Message
+		return m.Short
+	}
+	return nil
+}
+
+func (m *WarnRequest) GetDetail() []byte {
+	if m != nil {
+		return m.Detail
 	}
 	return nil
 }
@@ -2180,134 +2188,135 @@ func init() {
 func init() { proto.RegisterFile("gateway.proto", fileDescriptor_f1a937782ebbded5) }
 
 var fileDescriptor_f1a937782ebbded5 = []byte{
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+	0x69, 0xba, 0x4a, 0x77, 0xc9, 0x26, 0x54, 0x3b, 0x3c, 0x4a, 0xa4, 0xf0, 0x02, 0x3c, 0x58, 0xfb,
+	0xe2, 0x07, 0xc8, 0xac, 0xc3, 0xb8, 0x33, 0xdc, 0xa4, 0x59, 0x4e, 0xf2, 0x00, 0x80, 0xbd, 0x92,
+	0xc2, 0x3b, 0xe0, 0x89, 0x4c, 0xbd, 0x03, 0x88, 0x43, 0xc2, 0xe1, 0x29, 0xcd, 0xec, 0x3a, 0x6f,
+	0xc3, 0x9d, 0x51, 0x8f, 0x18, 0x57, 0x3d, 0x86, 0x1f, 0x52, 0x16, 0x32, 0x2f, 0x61, 0xf3, 0x7b,
+	0xcb, 0xb1, 0xa1, 0x79, 0x1d, 0x6c, 0x04, 0xff, 0xad, 0x00, 0xd5, 0xbd, 0x57, 0xac, 0x73, 0xcc,
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+	0xc8, 0xa7, 0x50, 0x3c, 0x8c, 0x02, 0x69, 0x9a, 0xda, 0x5a, 0xee, 0x88, 0x1d, 0x48, 0x23, 0x13,
+	0x9f, 0x97, 0xb8, 0x24, 0x5b, 0x50, 0xc4, 0x92, 0x30, 0x4b, 0x59, 0xf6, 0x33, 0x58, 0xc4, 0x90,
+	0x6d, 0xf5, 0x20, 0x0f, 0xbe, 0x61, 0x26, 0x4a, 0xad, 0xfc, 0x7e, 0x12, 0x7c, 0xc3, 0x86, 0x12,
+	0x0c, 0x92, 0xec, 0x41, 0xe9, 0x4c, 0x7a, 0x02, 0xa7, 0x32, 0x1d, 0xbd, 0xfb, 0x79, 0x63, 0x87,
+	0xe6, 0x1c, 0x4a, 0x49, 0xb1, 0xe8, 0x84, 0xbd, 0x57, 0x81, 0x54, 0x33, 0x57, 0xbe, 0x13, 0x90,
+	0x2d, 0x63, 0x08, 0x2e, 0x11, 0xbd, 0xcb, 0x23, 0xd6, 0x2c, 0x4d, 0x45, 0x23, 0x5b, 0x06, 0x8d,
+	0xcb, 0xed, 0x12, 0x2c, 0xa9, 0xb9, 0xc3, 0xf9, 0xb3, 0x05, 0xd5, 0x8c, 0x8f, 0x67, 0xb8, 0x33,
+	0xef, 0x40, 0x11, 0xdf, 0xe3, 0x26, 0x76, 0x65, 0x75, 0x63, 0x98, 0xf4, 0xa8, 0xa2, 0x62, 0x61,
+	0xdf, 0xf7, 0x75, 0xf9, 0xaa, 0x53, 0xfc, 0x44, 0xca, 0x97, 0xf2, 0x4a, 0xb9, 0xbb, 0x4c, 0xf1,
+	0x93, 0xac, 0x43, 0xf9, 0x8c, 0x75, 0xfa, 0x22, 0x90, 0x57, 0xca, 0x81, 0x8d, 0x8d, 0x15, 0x55,
+	0x0a, 0x0c, 0x4d, 0x5d, 0xac, 0x01, 0x87, 0xf3, 0x05, 0x26, 0xd6, 0x50, 0x41, 0x02, 0xc5, 0x1d,
+	0x7c, 0x95, 0xa0, 0x66, 0x75, 0xaa, 0xbe, 0xf1, 0x61, 0xb8, 0x37, 0xed, 0x61, 0xb8, 0x97, 0x3e,
+	0x0c, 0x47, 0x03, 0x82, 0x7d, 0x22, 0xe3, 0x20, 0xe7, 0x09, 0x54, 0x06, 0x49, 0x83, 0x6f, 0xf2,
+	0x7d, 0xdf, 0x9c, 0xb4, 0xb8, 0xef, 0xa3, 0x29, 0x7b, 0x4f, 0xf7, 0xd5, 0x29, 0x65, 0x8a, 0x9f,
+	0x83, 0xae, 0x5c, 0xc8, 0x74, 0xe5, 0x4d, 0x7c, 0xf2, 0x66, 0x32, 0x07, 0x99, 0x28, 0xbf, 0x4c,
+	0x52, 0x95, 0xf1, 0x5b, 0x9b, 0x11, 0x26, 0x4a, 0x96, 0x32, 0x23, 0x4c, 0x36, 0xfe, 0x59, 0x81,
+	0xca, 0xd1, 0xd1, 0xf6, 0xb6, 0x08, 0xfc, 0x1e, 0x23, 0xbf, 0xb3, 0x80, 0x5c, 0x7f, 0x49, 0x91,
+	0x8f, 0xf3, 0x13, 0x76, 0xf2, 0x73, 0xd0, 0xfe, 0x64, 0x4e, 0x94, 0x69, 0x92, 0x5f, 0xc1, 0x92,
+	0x1a, 0xd0, 0xc8, 0x8f, 0x67, 0x1c, 0xac, 0xed, 0xd6, 0x74, 0x46, 0x23, 0xbb, 0x03, 0xe5, 0x74,
+	0xc8, 0x21, 0x0f, 0x72, 0xd5, 0x1b, 0x99, 0xe1, 0xec, 0x0f, 0x66, 0xe2, 0x35, 0x87, 0xfc, 0x1a,
+	0x4a, 0x66, 0x76, 0x21, 0xf7, 0xa7, 0xe0, 0x86, 0x53, 0x94, 0xfd, 0x60, 0x16, 0xd6, 0xa1, 0x19,
+	0xe9, 0x8c, 0x92, 0x6b, 0xc6, 0xd8, 0x04, 0x94, 0x6b, 0xc6, 0xb5, 0xa1, 0xe7, 0x19, 0x14, 0x71,
+	0x98, 0x21, 0x79, 0xd7, 0x3c, 0x33, 0xed, 0xd8, 0x79, 0xe1, 0x1a, 0x99, 0x82, 0x7e, 0x85, 0xe5,
+	0x50, 0x3d, 0x08, 0xf3, 0x0b, 0x61, 0xe6, 0x1f, 0x1c, 0xfb, 0xfe, 0x0c, 0x9c, 0x43, 0xf1, 0xe6,
+	0x31, 0xd5, 0x9a, 0xe1, 0x6f, 0x94, 0xe9, 0xe2, 0xc7, 0xfe, 0xb0, 0xe1, 0x50, 0xcb, 0x76, 0x39,
+	0xe2, 0xe6, 0x40, 0x27, 0x0c, 0x08, 0x76, 0x7b, 0x66, 0x7e, 0x73, 0xe0, 0xb7, 0x38, 0x98, 0x8f,
+	0x76, 0x40, 0xb2, 0x91, 0xeb, 0x8e, 0x89, 0xbd, 0xd6, 0x7e, 0x38, 0x17, 0xc6, 0x1c, 0xee, 0xe9,
+	0x0e, 0x6b, 0xba, 0x28, 0xc9, 0x6f, 0x18, 0x83, 0x4e, 0x6c, 0xcf, 0xc8, 0xd7, 0xb2, 0x3e, 0xb2,
+	0x30, 0xcf, 0x70, 0xb2, 0xca, 0x95, 0x9d, 0x19, 0x30, 0x73, 0xf3, 0x2c, 0x3b, 0xa2, 0x6d, 0xd7,
+	0xbe, 0x7b, 0x73, 0xcf, 0xfa, 0xc7, 0x9b, 0x7b, 0xd6, 0xbf, 0xdf, 0xdc, 0xb3, 0xce, 0x97, 0xd5,
+	0xbf, 0xe3, 0x0f, 0xff, 0x17, 0x00, 0x00, 0xff, 0xff, 0xf6, 0x9b, 0x02, 0x2b, 0x6f, 0x18, 0x00,
+	0x00,
 }
 
 // Reference imports to suppress errors if they are not otherwise used.
@@ -4055,7 +4064,7 @@ func (m *WarnRequest) MarshalToSizedBuffer(dAtA []byte) (int, error) {
 				i = encodeVarintGateway(dAtA, i, uint64(size))
 			}
 			i--
-			dAtA[i] = 0x2a
+			dAtA[i] = 0x32
 		}
 	}
 	if m.Info != nil {
@@ -4068,12 +4077,19 @@ func (m *WarnRequest) MarshalToSizedBuffer(dAtA []byte) (int, error) {
 			i = encodeVarintGateway(dAtA, i, uint64(size))
 		}
 		i--
+		dAtA[i] = 0x2a
+	}
+	if len(m.Detail) > 0 {
+		i -= len(m.Detail)
+		copy(dAtA[i:], m.Detail)
+		i = encodeVarintGateway(dAtA, i, uint64(len(m.Detail)))
+		i--
 		dAtA[i] = 0x22
 	}
-	if len(m.Message) > 0 {
-		i -= len(m.Message)
-		copy(dAtA[i:], m.Message)
-		i = encodeVarintGateway(dAtA, i, uint64(len(m.Message)))
+	if len(m.Short) > 0 {
+		i -= len(m.Short)
+		copy(dAtA[i:], m.Short)
+		i = encodeVarintGateway(dAtA, i, uint64(len(m.Short)))
 		i--
 		dAtA[i] = 0x1a
 	}
@@ -5300,7 +5316,11 @@ func (m *WarnRequest) Size() (n int) {
 	if m.Level != 0 {
 		n += 1 + sovGateway(uint64(m.Level))
 	}
-	l = len(m.Message)
+	l = len(m.Short)
+	if l > 0 {
+		n += 1 + l + sovGateway(uint64(l))
+	}
+	l = len(m.Detail)
 	if l > 0 {
 		n += 1 + l + sovGateway(uint64(l))
 	}
@@ -9051,7 +9071,7 @@ func (m *WarnRequest) Unmarshal(dAtA []byte) error {
 			}
 		case 3:
 			if wireType != 2 {
-				return fmt.Errorf("proto: wrong wireType = %d for field Message", wireType)
+				return fmt.Errorf("proto: wrong wireType = %d for field Short", wireType)
 			}
 			var byteLen int
 			for shift := uint(0); ; shift += 7 {
@@ -9078,12 +9098,46 @@ func (m *WarnRequest) Unmarshal(dAtA []byte) error {
 			if postIndex > l {
 				return io.ErrUnexpectedEOF
 			}
-			m.Message = append(m.Message[:0], dAtA[iNdEx:postIndex]...)
-			if m.Message == nil {
-				m.Message = []byte{}
+			m.Short = append(m.Short[:0], dAtA[iNdEx:postIndex]...)
+			if m.Short == nil {
+				m.Short = []byte{}
 			}
 			iNdEx = postIndex
 		case 4:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field Detail", wireType)
+			}
+			var byteLen int
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowGateway
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				byteLen |= int(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			if byteLen < 0 {
+				return ErrInvalidLengthGateway
+			}
+			postIndex := iNdEx + byteLen
+			if postIndex < 0 {
+				return ErrInvalidLengthGateway
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.Detail = append(m.Detail[:0], dAtA[iNdEx:postIndex]...)
+			if m.Detail == nil {
+				m.Detail = []byte{}
+			}
+			iNdEx = postIndex
+		case 5:
 			if wireType != 2 {
 				return fmt.Errorf("proto: wrong wireType = %d for field Info", wireType)
 			}
@@ -9119,7 +9173,7 @@ func (m *WarnRequest) Unmarshal(dAtA []byte) error {
 				return err
 			}
 			iNdEx = postIndex
-		case 5:
+		case 6:
 			if wireType != 2 {
 				return fmt.Errorf("proto: wrong wireType = %d for field Ranges", wireType)
 			}
diff --git a/frontend/gateway/pb/gateway.proto b/frontend/gateway/pb/gateway.proto
index 5bf0a0bcfc73..0bef68729ba7 100644
--- a/frontend/gateway/pb/gateway.proto
+++ b/frontend/gateway/pb/gateway.proto
@@ -176,9 +176,10 @@ message PongResponse{
 message WarnRequest {
 	string Digest = 1 [(gogoproto.customtype) = "github.com/opencontainers/go-digest.Digest", (gogoproto.nullable) = false];
 	int64 Level = 2;
-	bytes Message = 3;
-	pb.SourceInfo info = 4;
-	repeated pb.Range ranges = 5;
+	bytes Short = 3;
+	bytes Detail = 4;
+	pb.SourceInfo info = 5;
+	repeated pb.Range ranges = 6;
 }
 
 message WarnResponse{}
diff --git a/solver/llbsolver/bridge.go b/solver/llbsolver/bridge.go
index 6689170db327..4b6007a92250 100644
--- a/solver/llbsolver/bridge.go
+++ b/solver/llbsolver/bridge.go
@@ -52,9 +52,10 @@ func (b *llbBridge) Warn(ctx context.Context, dgst digest.Digest, msg string, op
 		pw.Write(identity.NewID(), client.VertexWarning{
 			Vertex:     dgst,
 			Level:      level,
-			Message:    []byte(msg),
+			Short:      []byte(msg),
 			SourceInfo: opts.SourceInfo,
 			Range:      opts.Range,
+			Detail:     opts.Detail,
 		})
 		return pw.Close()
 	})
diff --git a/util/progress/progressui/display.go b/util/progress/progressui/display.go
index 13af8e38cbe3..8f9ddf858072 100644
--- a/util/progress/progressui/display.go
+++ b/util/progress/progressui/display.go
@@ -389,7 +389,7 @@ func (t *trace) displayInfo() (d displayInfo) {
 			jobs = append(jobs, j)
 		}
 		for _, w := range v.warnings {
-			msg := "WARN: " + string(w.Message)
+			msg := "WARN: " + string(w.Short)
 			j := &job{
 				startTime:     addTime(v.Started, t.localTimeDiff),
 				completedTime: addTime(v.Completed, t.localTimeDiff),
diff --git a/util/progress/progressui/printer.go b/util/progress/progressui/printer.go
index f02d53c0e70a..7530345749ba 100644
--- a/util/progress/progressui/printer.go
+++ b/util/progress/progressui/printer.go
@@ -126,7 +126,7 @@ func (p *textMux) printVtx(t *trace, dgst digest.Digest) {
 	v.statusUpdates = map[string]struct{}{}
 
 	for _, w := range v.warnings[v.warningIdx:] {
-		fmt.Fprintf(p.w, "#%d WARN: %s\n", v.index, w.Message)
+		fmt.Fprintf(p.w, "#%d WARN: %s\n", v.index, w.Short)
 		v.warningIdx++
 	}
 

From 872518e334a38033ba1739fb957f9826bd911ab0 Mon Sep 17 00:00:00 2001
From: Tonis Tiigi <tonistiigi@gmail.com>
Date: Mon, 13 Dec 2021 21:24:24 -0800
Subject: [PATCH 6/6] update warning type definition

Detail is now an array and URL is a separate field.

Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>
---
 api/services/control/control.pb.go            | 278 ++++++++------
 api/services/control/control.proto            |   7 +-
 client/build_test.go                          |   8 +-
 client/graph.go                               |   3 +-
 client/solve.go                               |   1 +
 control/control.go                            |   1 +
 frontend/dockerfile/builder/build.go          |   8 +-
 frontend/dockerfile/dockerfile2llb/convert.go |   4 +-
 frontend/dockerfile/parser/parser.go          |   6 +-
 frontend/dockerfile/parser/parser_test.go     |   2 +-
 frontend/gateway/client/client.go             |   3 +-
 frontend/gateway/gateway.go                   |   1 +
 frontend/gateway/grpcclient/client.go         |   1 +
 frontend/gateway/pb/gateway.pb.go             | 349 ++++++++++--------
 frontend/gateway/pb/gateway.proto             |  13 +-
 solver/llbsolver/bridge.go                    |   1 +
 16 files changed, 404 insertions(+), 282 deletions(-)

diff --git a/api/services/control/control.pb.go b/api/services/control/control.pb.go
index d640445575f3..706606a66d78 100644
--- a/api/services/control/control.pb.go
+++ b/api/services/control/control.pb.go
@@ -1007,9 +1007,10 @@ type VertexWarning struct {
 	Vertex               github_com_opencontainers_go_digest.Digest `protobuf:"bytes,1,opt,name=vertex,proto3,customtype=github.com/opencontainers/go-digest.Digest" json:"vertex"`
 	Level                int64                                      `protobuf:"varint,2,opt,name=level,proto3" json:"level,omitempty"`
 	Short                []byte                                     `protobuf:"bytes,3,opt,name=short,proto3" json:"short,omitempty"`
-	Detail               []byte                                     `protobuf:"bytes,4,opt,name=detail,proto3" json:"detail,omitempty"`
-	Info                 *pb.SourceInfo                             `protobuf:"bytes,5,opt,name=info,proto3" json:"info,omitempty"`
-	Ranges               []*pb.Range                                `protobuf:"bytes,6,rep,name=ranges,proto3" json:"ranges,omitempty"`
+	Detail               [][]byte                                   `protobuf:"bytes,4,rep,name=detail,proto3" json:"detail,omitempty"`
+	Url                  string                                     `protobuf:"bytes,5,opt,name=url,proto3" json:"url,omitempty"`
+	Info                 *pb.SourceInfo                             `protobuf:"bytes,6,opt,name=info,proto3" json:"info,omitempty"`
+	Ranges               []*pb.Range                                `protobuf:"bytes,7,rep,name=ranges,proto3" json:"ranges,omitempty"`
 	XXX_NoUnkeyedLiteral struct{}                                   `json:"-"`
 	XXX_unrecognized     []byte                                     `json:"-"`
 	XXX_sizecache        int32                                      `json:"-"`
@@ -1062,13 +1063,20 @@ func (m *VertexWarning) GetShort() []byte {
 	return nil
 }
 
-func (m *VertexWarning) GetDetail() []byte {
+func (m *VertexWarning) GetDetail() [][]byte {
 	if m != nil {
 		return m.Detail
 	}
 	return nil
 }
 
+func (m *VertexWarning) GetUrl() string {
+	if m != nil {
+		return m.Url
+	}
+	return ""
+}
+
 func (m *VertexWarning) GetInfo() *pb.SourceInfo {
 	if m != nil {
 		return m.Info
@@ -1253,102 +1261,103 @@ func init() {
 func init() { proto.RegisterFile("control.proto", fileDescriptor_0c5120591600887d) }
 
 var fileDescriptor_0c5120591600887d = []byte{
-	// 1514 bytes of a gzipped FileDescriptorProto
-	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0xac, 0x57, 0xcb, 0x6e, 0xdb, 0x46,
-	0x17, 0x0e, 0x25, 0x8b, 0x92, 0x8e, 0x65, 0xc3, 0x99, 0xe4, 0x0f, 0x08, 0xfe, 0xf8, 0x6d, 0x87,
-	0xc9, 0x0f, 0x18, 0x41, 0x42, 0x39, 0x6e, 0x53, 0xa4, 0xee, 0x05, 0x89, 0xac, 0x14, 0x71, 0x10,
-	0xa3, 0xe9, 0x28, 0x69, 0x80, 0x2c, 0x0a, 0x50, 0xd2, 0x48, 0x26, 0x4c, 0x71, 0xd8, 0x99, 0xa1,
-	0x13, 0xf5, 0x01, 0xba, 0xee, 0xae, 0x0f, 0xd0, 0x45, 0x57, 0x5d, 0xf7, 0x09, 0x0a, 0x64, 0xd9,
-	0x75, 0x16, 0x6e, 0x91, 0x45, 0x77, 0x2d, 0xfa, 0x08, 0xc5, 0x5c, 0x28, 0x53, 0x96, 0xe4, 0x5b,
-	0xba, 0xd2, 0x9c, 0xe1, 0xf9, 0x3e, 0x9d, 0xeb, 0xcc, 0x1c, 0x58, 0xe8, 0xd0, 0x58, 0x30, 0x1a,
-	0xf9, 0x09, 0xa3, 0x82, 0xa2, 0xa5, 0x01, 0x6d, 0x0f, 0xfd, 0x76, 0x1a, 0x46, 0xdd, 0xbd, 0x50,
-	0xf8, 0xfb, 0xb7, 0xdd, 0x5b, 0xfd, 0x50, 0xec, 0xa6, 0x6d, 0xbf, 0x43, 0x07, 0xf5, 0x3e, 0xed,
-	0xd3, 0xba, 0x52, 0x6c, 0xa7, 0x3d, 0x25, 0x29, 0x41, 0xad, 0x34, 0x81, 0xbb, 0xd2, 0xa7, 0xb4,
-	0x1f, 0x91, 0x43, 0x2d, 0x11, 0x0e, 0x08, 0x17, 0xc1, 0x20, 0x31, 0x0a, 0x37, 0x73, 0x7c, 0xf2,
-	0xcf, 0xea, 0xd9, 0x9f, 0xd5, 0x39, 0x8d, 0xf6, 0x09, 0xab, 0x27, 0xed, 0x3a, 0x4d, 0xb8, 0xd1,
-	0xae, 0xcf, 0xd4, 0x0e, 0x92, 0xb0, 0x2e, 0x86, 0x09, 0xe1, 0xf5, 0x97, 0x94, 0xed, 0x11, 0xa6,
-	0x01, 0xde, 0xb7, 0x16, 0xd4, 0x9e, 0xb0, 0x34, 0x26, 0x98, 0x7c, 0x9d, 0x12, 0x2e, 0xd0, 0x15,
-	0xb0, 0x7b, 0x61, 0x24, 0x08, 0x73, 0xac, 0xd5, 0xe2, 0x5a, 0x15, 0x1b, 0x09, 0x2d, 0x41, 0x31,
-	0x88, 0x22, 0xa7, 0xb0, 0x6a, 0xad, 0x55, 0xb0, 0x5c, 0xa2, 0x35, 0xa8, 0xed, 0x11, 0x92, 0x34,
-	0x53, 0x16, 0x88, 0x90, 0xc6, 0x4e, 0x71, 0xd5, 0x5a, 0x2b, 0x36, 0xe6, 0x5e, 0x1f, 0xac, 0x58,
-	0x78, 0xec, 0x0b, 0xf2, 0xa0, 0x2a, 0xe5, 0xc6, 0x50, 0x10, 0xee, 0xcc, 0xe5, 0xd4, 0x0e, 0xb7,
-	0xbd, 0x1b, 0xb0, 0xd4, 0x0c, 0xf9, 0xde, 0x33, 0x1e, 0xf4, 0x4f, 0xb2, 0xc5, 0x7b, 0x04, 0x17,
-	0x73, 0xba, 0x3c, 0xa1, 0x31, 0x27, 0xe8, 0x0e, 0xd8, 0x8c, 0x74, 0x28, 0xeb, 0x2a, 0xe5, 0xf9,
-	0x8d, 0xff, 0xf9, 0x47, 0x73, 0xe3, 0x1b, 0x80, 0x54, 0xc2, 0x46, 0xd9, 0xfb, 0xbe, 0x08, 0xf3,
-	0xb9, 0x7d, 0xb4, 0x08, 0x85, 0xed, 0xa6, 0x63, 0xad, 0x5a, 0x6b, 0x55, 0x5c, 0xd8, 0x6e, 0x22,
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+	0xc0, 0x1a, 0x82, 0xbe, 0x82, 0xea, 0x83, 0x48, 0x04, 0x22, 0x24, 0x43, 0x95, 0xb1, 0x8a, 0xcc,
+	0x58, 0x73, 0xf3, 0xcd, 0xc1, 0xda, 0x07, 0x73, 0x0f, 0x9e, 0x44, 0x04, 0x61, 0x9d, 0x64, 0x50,
+	0x5e, 0x86, 0x02, 0x4f, 0xf0, 0xa1, 0x17, 0xb0, 0x9c, 0x1a, 0xbb, 0x1d, 0xc5, 0x89, 0xe0, 0x36,
+	0x28, 0xaf, 0x1b, 0xa7, 0xf4, 0x5a, 0x83, 0xb4, 0xdb, 0x47, 0x98, 0x9c, 0x7b, 0x80, 0xa6, 0x73,
+	0x25, 0x6b, 0x6a, 0x8f, 0x8c, 0xd2, 0x9a, 0xda, 0x23, 0x23, 0xd9, 0xd6, 0xfb, 0x7e, 0x98, 0xe8,
+	0x76, 0xaf, 0x60, 0x2d, 0x6c, 0xe6, 0xee, 0x5a, 0x92, 0x61, 0x3a, 0xbc, 0x67, 0x62, 0xf8, 0x02,
+	0x2e, 0xcd, 0x30, 0x75, 0x06, 0xc5, 0xf5, 0x2c, 0xc5, 0x74, 0x4d, 0x1f, 0x52, 0xba, 0x3f, 0xe5,
+	0xa1, 0x9a, 0x4d, 0x18, 0xda, 0x80, 0x4b, 0xda, 0x4f, 0x4c, 0xfa, 0x2d, 0x12, 0x33, 0xd2, 0x95,
+	0xa7, 0x84, 0x21, 0x9f, 0xf5, 0x09, 0x35, 0xe0, 0xf2, 0xf6, 0xd0, 0x6c, 0xf3, 0x0c, 0x24, 0xa7,
+	0xfa, 0x71, 0xe6, 0x37, 0x44, 0xe1, 0x3f, 0x9a, 0x4a, 0x45, 0x22, 0x03, 0xca, 0xab, 0x84, 0x7d,
+	0x78, 0x7c, 0x55, 0x79, 0x33, 0xb1, 0x3a, 0x6f, 0xb3, 0x79, 0xd1, 0x27, 0x50, 0xd2, 0x1f, 0xd2,
+	0xc6, 0xbc, 0x76, 0xfc, 0x5f, 0x68, 0xb2, 0x14, 0x23, 0xe1, 0xda, 0x0f, 0x6e, 0x17, 0xce, 0x00,
+	0x37, 0x18, 0xe7, 0x21, 0x38, 0xf3, 0x4d, 0x3e, 0x4b, 0x09, 0xb8, 0x3f, 0x5a, 0x70, 0x71, 0xea,
+	0x8f, 0xe4, 0xad, 0xa1, 0xce, 0x4d, 0x4d, 0xa1, 0xd6, 0xa8, 0x05, 0x05, 0xdd, 0xf9, 0x39, 0x65,
+	0xb0, 0x77, 0x0a, 0x83, 0xbd, 0x4c, 0xdb, 0x6b, 0xb0, 0x73, 0x17, 0xe0, 0x7c, 0xc5, 0xea, 0xfe,
+	0x6c, 0xc1, 0x92, 0xe9, 0x32, 0x73, 0xc5, 0xfa, 0xb0, 0x92, 0xb6, 0x50, 0xba, 0x67, 0x2e, 0xdb,
+	0x3b, 0x73, 0x1b, 0x54, 0xab, 0x79, 0x47, 0x71, 0xda, 0xc6, 0x29, 0x3a, 0x67, 0x2b, 0xad, 0xab,
+	0x23, 0xaa, 0x67, 0xb2, 0xfc, 0x2a, 0x2c, 0xb5, 0x85, 0x2f, 0x12, 0x3e, 0xf7, 0xe6, 0x70, 0xff,
+	0xb2, 0x60, 0x39, 0xd5, 0x31, 0xde, 0xbd, 0x0f, 0xe5, 0x7d, 0xc2, 0x04, 0x79, 0x45, 0xb8, 0xf1,
+	0xca, 0x9e, 0xf6, 0xea, 0x4b, 0xa5, 0x81, 0xc7, 0x9a, 0x68, 0x13, 0xca, 0x5c, 0xf1, 0x90, 0x34,
+	0x51, 0xab, 0xf3, 0x50, 0xe6, 0xff, 0xc6, 0xfa, 0xa8, 0x0e, 0x0b, 0x21, 0x1d, 0x70, 0xd3, 0x33,
+	0xff, 0x9d, 0x87, 0x7b, 0x4c, 0x07, 0x58, 0x29, 0xa2, 0x8f, 0xa0, 0xfc, 0xd2, 0x67, 0x51, 0x10,
+	0x0d, 0xd2, 0x2e, 0x58, 0x9b, 0x07, 0x7a, 0xae, 0xf5, 0xf0, 0x18, 0xe0, 0x1e, 0xe4, 0xa0, 0xa8,
+	0xbf, 0xa1, 0x47, 0x50, 0xec, 0x05, 0x03, 0xc2, 0x85, 0x0e, 0x49, 0xb3, 0x21, 0x0f, 0xf9, 0x37,
+	0x07, 0x6b, 0x37, 0x32, 0xa7, 0x38, 0x8d, 0x49, 0x24, 0x1f, 0xbb, 0x7e, 0x10, 0x11, 0xc6, 0xeb,
+	0x03, 0x7a, 0x4b, 0x43, 0xbc, 0x96, 0xfa, 0xc1, 0x86, 0x41, 0x72, 0x05, 0xfa, 0xac, 0x56, 0xe7,
+	0xc5, 0xf9, 0xb8, 0x34, 0x83, 0x6c, 0x83, 0xc8, 0x1f, 0x12, 0x73, 0x37, 0xab, 0xb5, 0x7c, 0x38,
+	0x74, 0x65, 0x9d, 0xf7, 0xd4, 0x93, 0xaa, 0x8c, 0x8d, 0x84, 0x36, 0xa1, 0xc4, 0x85, 0xcf, 0xe4,
+	0x99, 0x53, 0x38, 0xe5, 0x8b, 0x27, 0x05, 0xa0, 0x4f, 0xa1, 0xd2, 0xa5, 0xc3, 0x38, 0x24, 0x12,
+	0x5d, 0x3c, 0x25, 0xfa, 0x10, 0x22, 0x4b, 0x8f, 0x30, 0x46, 0x99, 0x7a, 0x6b, 0x55, 0xb0, 0x16,
+	0xdc, 0x3f, 0x73, 0x50, 0xcd, 0x66, 0x7a, 0xea, 0x2d, 0xf9, 0x08, 0x8a, 0xba, 0x6e, 0x74, 0xc9,
+	0x9e, 0x2f, 0x54, 0x9a, 0x61, 0x66, 0xa8, 0x6c, 0x28, 0x75, 0x13, 0xa6, 0x1e, 0x9a, 0xfa, 0xf9,
+	0x99, 0x8a, 0xd2, 0x60, 0x41, 0x85, 0x1f, 0xaa, 0x50, 0xe5, 0xb1, 0x16, 0xe4, 0xdb, 0x73, 0x3c,
+	0x6e, 0x9c, 0xed, 0xed, 0x39, 0x86, 0x65, 0xd3, 0x50, 0x7a, 0xa7, 0x34, 0x94, 0xcf, 0x9c, 0x06,
+	0xf7, 0x17, 0x0b, 0x2a, 0xe3, 0x16, 0xc9, 0x44, 0xd7, 0x7a, 0xe7, 0xe8, 0x4e, 0x44, 0x26, 0x77,
+	0xbe, 0xc8, 0x5c, 0x81, 0x22, 0x17, 0x8c, 0xf8, 0x43, 0x3d, 0x19, 0x61, 0x23, 0xc9, 0xc3, 0x68,
+	0xc8, 0x07, 0x2a, 0x43, 0x55, 0x2c, 0x97, 0xee, 0xdf, 0x16, 0x2c, 0x4d, 0x74, 0xed, 0xbf, 0xea,
+	0xcb, 0x65, 0x28, 0x84, 0x64, 0x9f, 0xe8, 0xd9, 0x2d, 0x8f, 0xb5, 0x20, 0x77, 0xf9, 0x2e, 0x65,
+	0x42, 0x19, 0x57, 0xc5, 0x5a, 0x90, 0x36, 0xf7, 0x88, 0xf0, 0x83, 0x50, 0x1d, 0x2f, 0x55, 0x6c,
+	0x24, 0x69, 0x73, 0xc2, 0x42, 0xf3, 0x7e, 0x95, 0x4b, 0xe4, 0xc2, 0x42, 0x10, 0xf5, 0xa9, 0x29,
+	0x1b, 0xf5, 0x40, 0x69, 0xd3, 0x84, 0x75, 0xc9, 0x76, 0xd4, 0xa7, 0x58, 0x7d, 0x43, 0x57, 0xa1,
+	0xc8, 0xfc, 0x68, 0x40, 0xd2, 0xc7, 0x6b, 0x45, 0x6a, 0x61, 0xb9, 0x83, 0xcd, 0x07, 0xd7, 0x85,
+	0xaa, 0x9a, 0xff, 0x76, 0x08, 0x97, 0xd3, 0x86, 0x2c, 0xeb, 0x9e, 0x2f, 0x7c, 0xe5, 0x76, 0x15,
+	0xab, 0xb5, 0x7b, 0x13, 0xd0, 0xe3, 0x80, 0x8b, 0xe7, 0x6a, 0x6e, 0xe5, 0x27, 0x0d, 0x87, 0x6d,
+	0xb8, 0x34, 0xa1, 0x6d, 0x4e, 0xf7, 0x8f, 0x8f, 0x8c, 0x87, 0xd7, 0xa7, 0x0f, 0x4e, 0x35, 0x1e,
+	0x7b, 0x1a, 0x38, 0x39, 0x25, 0x36, 0xfe, 0xc8, 0x43, 0x69, 0x4b, 0x4f, 0xfe, 0xe8, 0x29, 0x54,
+	0xc6, 0xd3, 0x27, 0x72, 0xa7, 0x69, 0x8e, 0x8e, 0xb1, 0xce, 0xb5, 0x63, 0x75, 0x8c, 0x7d, 0x0f,
+	0xa1, 0xa0, 0xe6, 0x70, 0x34, 0xe3, 0xfa, 0xc8, 0x0e, 0xe8, 0xce, 0xf1, 0x73, 0xed, 0x86, 0x25,
+	0x99, 0xd4, 0xdd, 0x3b, 0x8b, 0x29, 0xfb, 0x6a, 0x76, 0xd6, 0x4e, 0xb8, 0xb4, 0xd1, 0x0e, 0x14,
+	0xcd, 0x49, 0x36, 0x4b, 0x35, 0x7b, 0xc3, 0x3a, 0xeb, 0xf3, 0x15, 0x34, 0xd9, 0x86, 0x85, 0x76,
+	0xc6, 0x83, 0xd0, 0x2c, 0xd3, 0xb2, 0x65, 0xe0, 0x9c, 0xf0, 0xbd, 0x66, 0x6d, 0x58, 0xe8, 0x05,
+	0x2c, 0x66, 0x12, 0x8d, 0x66, 0x24, 0x74, 0xba, 0x6a, 0x9c, 0xff, 0x9f, 0xa0, 0xa5, 0x8d, 0x6d,
+	0x56, 0x5f, 0xbf, 0x5d, 0xb5, 0x7e, 0x7d, 0xbb, 0x6a, 0xfd, 0xfe, 0x76, 0xd5, 0xea, 0x14, 0x55,
+	0xcb, 0xbf, 0xf7, 0x4f, 0x00, 0x00, 0x00, 0xff, 0xff, 0x8f, 0x2a, 0x40, 0x92, 0xfd, 0x11, 0x00,
+	0x00,
 }
 
 // Reference imports to suppress errors if they are not otherwise used.
@@ -2671,7 +2680,7 @@ func (m *VertexWarning) MarshalToSizedBuffer(dAtA []byte) (int, error) {
 				i = encodeVarintControl(dAtA, i, uint64(size))
 			}
 			i--
-			dAtA[i] = 0x32
+			dAtA[i] = 0x3a
 		}
 	}
 	if m.Info != nil {
@@ -2684,14 +2693,23 @@ func (m *VertexWarning) MarshalToSizedBuffer(dAtA []byte) (int, error) {
 			i = encodeVarintControl(dAtA, i, uint64(size))
 		}
 		i--
+		dAtA[i] = 0x32
+	}
+	if len(m.Url) > 0 {
+		i -= len(m.Url)
+		copy(dAtA[i:], m.Url)
+		i = encodeVarintControl(dAtA, i, uint64(len(m.Url)))
+		i--
 		dAtA[i] = 0x2a
 	}
 	if len(m.Detail) > 0 {
-		i -= len(m.Detail)
-		copy(dAtA[i:], m.Detail)
-		i = encodeVarintControl(dAtA, i, uint64(len(m.Detail)))
-		i--
-		dAtA[i] = 0x22
+		for iNdEx := len(m.Detail) - 1; iNdEx >= 0; iNdEx-- {
+			i -= len(m.Detail[iNdEx])
+			copy(dAtA[i:], m.Detail[iNdEx])
+			i = encodeVarintControl(dAtA, i, uint64(len(m.Detail[iNdEx])))
+			i--
+			dAtA[i] = 0x22
+		}
 	}
 	if len(m.Short) > 0 {
 		i -= len(m.Short)
@@ -3285,7 +3303,13 @@ func (m *VertexWarning) Size() (n int) {
 	if l > 0 {
 		n += 1 + l + sovControl(uint64(l))
 	}
-	l = len(m.Detail)
+	if len(m.Detail) > 0 {
+		for _, b := range m.Detail {
+			l = len(b)
+			n += 1 + l + sovControl(uint64(l))
+		}
+	}
+	l = len(m.Url)
 	if l > 0 {
 		n += 1 + l + sovControl(uint64(l))
 	}
@@ -6554,12 +6578,42 @@ func (m *VertexWarning) Unmarshal(dAtA []byte) error {
 			if postIndex > l {
 				return io.ErrUnexpectedEOF
 			}
-			m.Detail = append(m.Detail[:0], dAtA[iNdEx:postIndex]...)
-			if m.Detail == nil {
-				m.Detail = []byte{}
-			}
+			m.Detail = append(m.Detail, make([]byte, postIndex-iNdEx))
+			copy(m.Detail[len(m.Detail)-1], dAtA[iNdEx:postIndex])
 			iNdEx = postIndex
 		case 5:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field Url", wireType)
+			}
+			var stringLen uint64
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowControl
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				stringLen |= uint64(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			intStringLen := int(stringLen)
+			if intStringLen < 0 {
+				return ErrInvalidLengthControl
+			}
+			postIndex := iNdEx + intStringLen
+			if postIndex < 0 {
+				return ErrInvalidLengthControl
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.Url = string(dAtA[iNdEx:postIndex])
+			iNdEx = postIndex
+		case 6:
 			if wireType != 2 {
 				return fmt.Errorf("proto: wrong wireType = %d for field Info", wireType)
 			}
@@ -6595,7 +6649,7 @@ func (m *VertexWarning) Unmarshal(dAtA []byte) error {
 				return err
 			}
 			iNdEx = postIndex
-		case 6:
+		case 7:
 			if wireType != 2 {
 				return fmt.Errorf("proto: wrong wireType = %d for field Ranges", wireType)
 			}
diff --git a/api/services/control/control.proto b/api/services/control/control.proto
index 388bbcf64f93..4f41352ec2ed 100644
--- a/api/services/control/control.proto
+++ b/api/services/control/control.proto
@@ -139,9 +139,10 @@ message VertexWarning {
 	string vertex = 1 [(gogoproto.customtype) = "github.com/opencontainers/go-digest.Digest", (gogoproto.nullable) = false];
 	int64 level = 2;
 	bytes short = 3;
-	bytes detail = 4;
-	pb.SourceInfo info = 5;
-	repeated pb.Range ranges = 6;
+	repeated bytes detail = 4;
+	string url = 5;
+	pb.SourceInfo info = 6;
+	repeated pb.Range ranges = 7;
 }
 
 message BytesMessage {
diff --git a/client/build_test.go b/client/build_test.go
index 65e5c092bf34..121777b02109 100644
--- a/client/build_test.go
+++ b/client/build_test.go
@@ -193,7 +193,8 @@ func testWarnings(t *testing.T, sb integration.Sandbox) {
 			Range: []*pb.Range{
 				{Start: pb.Position{Line: 2}, End: pb.Position{Line: 4}},
 			},
-			Detail: []byte("this is detail"),
+			Detail: [][]byte{[]byte("this is detail"), []byte("and more detail")},
+			URL:    "https://example.com",
 		}))
 
 		return r, nil
@@ -241,7 +242,10 @@ func testWarnings(t *testing.T, sb integration.Sandbox) {
 	w := warnings[0]
 
 	require.Equal(t, "this is warning", string(w.Short))
-	require.Equal(t, "this is detail", string(w.Detail))
+	require.Equal(t, 2, len(w.Detail))
+	require.Equal(t, "this is detail", string(w.Detail[0]))
+	require.Equal(t, "and more detail", string(w.Detail[1]))
+	require.Equal(t, "https://example.com", w.URL)
 	require.Equal(t, 3, w.Level)
 	_, ok := vertexes[w.Vertex]
 	require.True(t, ok)
diff --git a/client/graph.go b/client/graph.go
index 4be88cd6fcf3..6171e7db7021 100644
--- a/client/graph.go
+++ b/client/graph.go
@@ -39,7 +39,8 @@ type VertexWarning struct {
 	Vertex     digest.Digest
 	Level      int
 	Short      []byte
-	Detail     []byte
+	Detail     [][]byte
+	URL        string
 	SourceInfo *pb.SourceInfo
 	Range      []*pb.Range
 }
diff --git a/client/solve.go b/client/solve.go
index c84da439c2fb..160d4ae8f5a9 100644
--- a/client/solve.go
+++ b/client/solve.go
@@ -298,6 +298,7 @@ func (c *Client) solve(ctx context.Context, def *llb.Definition, runGateway runG
 					Level:      int(v.Level),
 					Short:      v.Short,
 					Detail:     v.Detail,
+					URL:        v.Url,
 					SourceInfo: v.Info,
 					Range:      v.Ranges,
 				})
diff --git a/control/control.go b/control/control.go
index 795644811a59..c778e2997f40 100644
--- a/control/control.go
+++ b/control/control.go
@@ -384,6 +384,7 @@ func (c *Controller) Status(req *controlapi.StatusRequest, stream controlapi.Con
 						Detail: v.Detail,
 						Info:   v.SourceInfo,
 						Ranges: v.Range,
+						Url:    v.URL,
 					})
 				}
 				if err := stream.SendMsg(&sr); err != nil {
diff --git a/frontend/dockerfile/builder/build.go b/frontend/dockerfile/builder/build.go
index ecb1d90deb76..cf4cc471787f 100644
--- a/frontend/dockerfile/builder/build.go
+++ b/frontend/dockerfile/builder/build.go
@@ -455,11 +455,11 @@ func Build(ctx context.Context, c client.Client) (*client.Result, error) {
 					LLBCaps:           &caps,
 					SourceMap:         sourceMap,
 					Hostname:          opts[keyHostname],
-					Warn: func(msg, detail string, location *parser.Range) {
+					Warn: func(msg, url string, detail [][]byte, location *parser.Range) {
 						if i != 0 {
 							return
 						}
-						c.Warn(ctx, defVtx, msg, warnOpts(sourceMap, location, detail))
+						c.Warn(ctx, defVtx, msg, warnOpts(sourceMap, location, detail, url))
 					},
 				})
 
@@ -779,8 +779,8 @@ func scopeToSubDir(c *llb.State, fileop bool, dir string) *llb.State {
 	return &bc
 }
 
-func warnOpts(sm *llb.SourceMap, r *parser.Range, detail string) client.WarnOpts {
-	opts := client.WarnOpts{Level: 1, Detail: []byte(detail)}
+func warnOpts(sm *llb.SourceMap, r *parser.Range, detail [][]byte, url string) client.WarnOpts {
+	opts := client.WarnOpts{Level: 1, Detail: detail, URL: url}
 	if r == nil {
 		return opts
 	}
diff --git a/frontend/dockerfile/dockerfile2llb/convert.go b/frontend/dockerfile/dockerfile2llb/convert.go
index f54cab1ad748..0a521621ca64 100644
--- a/frontend/dockerfile/dockerfile2llb/convert.go
+++ b/frontend/dockerfile/dockerfile2llb/convert.go
@@ -68,7 +68,7 @@ type ConvertOpt struct {
 	ContextLocalName  string
 	SourceMap         *llb.SourceMap
 	Hostname          string
-	Warn              func(short, detail string, location *parser.Range)
+	Warn              func(short, url string, detail [][]byte, location *parser.Range)
 }
 
 func Dockerfile2LLB(ctx context.Context, dt []byte, opt ConvertOpt) (*llb.State, *Image, error) {
@@ -93,7 +93,7 @@ func Dockerfile2LLB(ctx context.Context, dt []byte, opt ConvertOpt) (*llb.State,
 	}
 
 	for _, w := range dockerfile.Warnings {
-		opt.Warn(w.Short, w.Detail, w.Location)
+		opt.Warn(w.Short, w.URL, w.Detail, w.Location)
 	}
 
 	proxyEnv := proxyEnvFromBuildArgs(opt.BuildArgs)
diff --git a/frontend/dockerfile/parser/parser.go b/frontend/dockerfile/parser/parser.go
index 4e4fa65a722d..f3acd3282326 100644
--- a/frontend/dockerfile/parser/parser.go
+++ b/frontend/dockerfile/parser/parser.go
@@ -274,7 +274,8 @@ type Result struct {
 
 type Warning struct {
 	Short    string
-	Detail   string
+	Detail   [][]byte
+	URL      string
 	Location *Range
 }
 
@@ -354,7 +355,8 @@ func Parse(rwc io.Reader) (*Result, error) {
 		if hasEmptyContinuationLine {
 			warnings = append(warnings, Warning{
 				Short:    "Empty continuation line found in: " + line,
-				Detail:   "Empty continuation lines will become errors in a future release. https://github.com/moby/moby/pull/33719",
+				Detail:   [][]byte{[]byte("Empty continuation lines will become errors in a future release")},
+				URL:      "https://github.com/moby/moby/pull/33719",
 				Location: &Range{Start: Position{Line: currentLine}, End: Position{Line: currentLine}},
 			})
 		}
diff --git a/frontend/dockerfile/parser/parser_test.go b/frontend/dockerfile/parser/parser_test.go
index 89a75089ef25..676188f1ea5f 100644
--- a/frontend/dockerfile/parser/parser_test.go
+++ b/frontend/dockerfile/parser/parser_test.go
@@ -166,7 +166,7 @@ RUN indented \
 	require.Contains(t, warnings[0].Short, "Empty continuation line found in")
 	require.Contains(t, warnings[0].Short, "RUN something     following     more")
 	require.Contains(t, warnings[1].Short, "RUN another     thing")
-	require.Contains(t, warnings[0].Detail, "will become errors in a future release")
+	require.Contains(t, string(warnings[0].Detail[0]), "will become errors in a future release")
 }
 
 func TestParseReturnsScannerErrors(t *testing.T) {
diff --git a/frontend/gateway/client/client.go b/frontend/gateway/client/client.go
index 8fc74ec59447..4475a24a7206 100644
--- a/frontend/gateway/client/client.go
+++ b/frontend/gateway/client/client.go
@@ -139,5 +139,6 @@ type WarnOpts struct {
 	Level      int
 	SourceInfo *pb.SourceInfo
 	Range      []*pb.Range
-	Detail     []byte
+	Detail     [][]byte
+	URL        string
 }
diff --git a/frontend/gateway/gateway.go b/frontend/gateway/gateway.go
index a4b6382b494b..f1973ff28f99 100644
--- a/frontend/gateway/gateway.go
+++ b/frontend/gateway/gateway.go
@@ -999,6 +999,7 @@ func (lbf *llbBridgeForwarder) Warn(ctx context.Context, in *pb.WarnRequest) (*p
 		SourceInfo: in.Info,
 		Range:      in.Ranges,
 		Detail:     in.Detail,
+		URL:        in.Url,
 	})
 	if err != nil {
 		return nil, err
diff --git a/frontend/gateway/grpcclient/client.go b/frontend/gateway/grpcclient/client.go
index 11e8f7db26e7..e0ee70c1309e 100644
--- a/frontend/gateway/grpcclient/client.go
+++ b/frontend/gateway/grpcclient/client.go
@@ -306,6 +306,7 @@ func (c *grpcClient) Warn(ctx context.Context, dgst digest.Digest, msg string, o
 		Info:   opts.SourceInfo,
 		Ranges: opts.Range,
 		Detail: opts.Detail,
+		Url:    opts.URL,
 	})
 	return err
 }
diff --git a/frontend/gateway/pb/gateway.pb.go b/frontend/gateway/pb/gateway.pb.go
index bda8615c011a..cacba346a1d2 100644
--- a/frontend/gateway/pb/gateway.pb.go
+++ b/frontend/gateway/pb/gateway.pb.go
@@ -1331,12 +1331,13 @@ func (m *PongResponse) GetWorkers() []*types1.WorkerRecord {
 }
 
 type WarnRequest struct {
-	Digest               github_com_opencontainers_go_digest.Digest `protobuf:"bytes,1,opt,name=Digest,proto3,customtype=github.com/opencontainers/go-digest.Digest" json:"Digest"`
-	Level                int64                                      `protobuf:"varint,2,opt,name=Level,proto3" json:"Level,omitempty"`
-	Short                []byte                                     `protobuf:"bytes,3,opt,name=Short,proto3" json:"Short,omitempty"`
-	Detail               []byte                                     `protobuf:"bytes,4,opt,name=Detail,proto3" json:"Detail,omitempty"`
-	Info                 *pb.SourceInfo                             `protobuf:"bytes,5,opt,name=info,proto3" json:"info,omitempty"`
-	Ranges               []*pb.Range                                `protobuf:"bytes,6,rep,name=ranges,proto3" json:"ranges,omitempty"`
+	Digest               github_com_opencontainers_go_digest.Digest `protobuf:"bytes,1,opt,name=digest,proto3,customtype=github.com/opencontainers/go-digest.Digest" json:"digest"`
+	Level                int64                                      `protobuf:"varint,2,opt,name=level,proto3" json:"level,omitempty"`
+	Short                []byte                                     `protobuf:"bytes,3,opt,name=short,proto3" json:"short,omitempty"`
+	Detail               [][]byte                                   `protobuf:"bytes,4,rep,name=detail,proto3" json:"detail,omitempty"`
+	Url                  string                                     `protobuf:"bytes,5,opt,name=url,proto3" json:"url,omitempty"`
+	Info                 *pb.SourceInfo                             `protobuf:"bytes,6,opt,name=info,proto3" json:"info,omitempty"`
+	Ranges               []*pb.Range                                `protobuf:"bytes,7,rep,name=ranges,proto3" json:"ranges,omitempty"`
 	XXX_NoUnkeyedLiteral struct{}                                   `json:"-"`
 	XXX_unrecognized     []byte                                     `json:"-"`
 	XXX_sizecache        int32                                      `json:"-"`
@@ -1389,13 +1390,20 @@ func (m *WarnRequest) GetShort() []byte {
 	return nil
 }
 
-func (m *WarnRequest) GetDetail() []byte {
+func (m *WarnRequest) GetDetail() [][]byte {
 	if m != nil {
 		return m.Detail
 	}
 	return nil
 }
 
+func (m *WarnRequest) GetUrl() string {
+	if m != nil {
+		return m.Url
+	}
+	return ""
+}
+
 func (m *WarnRequest) GetInfo() *pb.SourceInfo {
 	if m != nil {
 		return m.Info
@@ -2188,135 +2196,135 @@ func init() {
 func init() { proto.RegisterFile("gateway.proto", fileDescriptor_f1a937782ebbded5) }
 
 var fileDescriptor_f1a937782ebbded5 = []byte{
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+	0xa5, 0x2f, 0x9b, 0xd9, 0x70, 0x5b, 0xd0, 0xd0, 0x76, 0x9b, 0x69, 0xef, 0x8f, 0x0b, 0x70, 0xe7,
+	0x98, 0x5d, 0x6c, 0x67, 0x76, 0x65, 0x0e, 0x59, 0x81, 0xfa, 0x90, 0x76, 0xb0, 0x63, 0xd2, 0x2f,
+	0x4f, 0xc2, 0xc3, 0x8e, 0xf8, 0x20, 0x96, 0x59, 0x0c, 0xd5, 0x61, 0x8a, 0x42, 0xcd, 0x06, 0xf9,
+	0x09, 0x54, 0x8e, 0x99, 0xc4, 0xb7, 0xa4, 0xb2, 0xba, 0xb5, 0x5e, 0x47, 0x9e, 0x63, 0x26, 0x71,
+	0x34, 0xa2, 0xd9, 0x1e, 0xce, 0x5b, 0x49, 0x36, 0x6f, 0x95, 0xa7, 0xcd, 0x5b, 0xd9, 0x2e, 0xd9,
+	0x80, 0x7a, 0x97, 0xc7, 0xa9, 0x14, 0x7e, 0x88, 0x07, 0x2f, 0x2a, 0xe6, 0x1f, 0x21, 0xb3, 0x0e,
+	0xec, 0xf6, 0x68, 0x93, 0xe6, 0x39, 0xc9, 0x03, 0x00, 0xf6, 0x4a, 0x0a, 0x7f, 0x9f, 0xa7, 0x32,
+	0xb5, 0x97, 0x94, 0xc2, 0x80, 0x38, 0x24, 0x1c, 0x9c, 0xd0, 0xdc, 0xae, 0xfb, 0x16, 0xbc, 0x39,
+	0xee, 0x11, 0xe3, 0xaa, 0xc7, 0xf0, 0x63, 0xca, 0x22, 0xe6, 0xa7, 0x6c, 0x7e, 0x6f, 0xb9, 0x0e,
+	0xd8, 0x57, 0xc1, 0x46, 0xf0, 0xdf, 0x4b, 0x50, 0xdf, 0x7d, 0xc5, 0xba, 0x47, 0x2c, 0x4d, 0xfd,
+	0x3e, 0x23, 0x6f, 0x43, 0xed, 0x44, 0xf0, 0x2e, 0x4b, 0xd3, 0xa1, 0xac, 0x11, 0x81, 0x7c, 0x02,
+	0xe5, 0x83, 0x38, 0x94, 0xa6, 0xcd, 0xad, 0x16, 0x0e, 0xdd, 0xa1, 0x34, 0x32, 0xf1, 0xc1, 0x89,
+	0x4b, 0xb2, 0x09, 0x65, 0x2c, 0x12, 0x37, 0x29, 0xd4, 0x41, 0x0e, 0x8b, 0x18, 0xb2, 0xa5, 0x9e,
+	0xe8, 0xe1, 0x37, 0xcc, 0x44, 0xa9, 0x5d, 0xdc, 0x61, 0xc2, 0x6f, 0xd8, 0x48, 0x82, 0x41, 0x92,
+	0x5d, 0xa8, 0x9c, 0x4a, 0x5f, 0xe0, 0x9c, 0xa6, 0xa3, 0x77, 0xbf, 0x68, 0x10, 0xd1, 0x9c, 0x23,
+	0x29, 0x19, 0x16, 0x9d, 0xb0, 0xfb, 0x2a, 0x94, 0xe6, 0x36, 0x14, 0x39, 0x01, 0xd9, 0x72, 0x86,
+	0xe0, 0x12, 0xd1, 0x3b, 0x3c, 0x66, 0x76, 0x65, 0x26, 0x1a, 0xd9, 0x72, 0x68, 0x5c, 0x6e, 0x55,
+	0x60, 0x51, 0x4d, 0x22, 0xee, 0x5f, 0x2c, 0xa8, 0xe7, 0x7c, 0x7c, 0x83, 0x3b, 0xf3, 0x36, 0x94,
+	0xf1, 0x85, 0x6e, 0x62, 0x57, 0x55, 0x37, 0x86, 0x49, 0x9f, 0x2a, 0x2a, 0x5e, 0xfa, 0xbd, 0x40,
+	0x17, 0xb4, 0x26, 0xc5, 0x4f, 0xa4, 0x7c, 0x29, 0x2f, 0x95, 0xbb, 0xab, 0x14, 0x3f, 0xc9, 0x1a,
+	0x54, 0x4f, 0x59, 0x77, 0x20, 0x42, 0x79, 0xa9, 0x1c, 0xd8, 0x5a, 0x5f, 0x56, 0xa5, 0xc0, 0xd0,
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+	0x6a, 0xd6, 0xa4, 0xea, 0x1b, 0x9f, 0x8a, 0xbb, 0xb3, 0x9e, 0x8a, 0xbb, 0xd9, 0x53, 0x71, 0x3c,
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+	0x49, 0x0b, 0x7b, 0x01, 0x9a, 0xb2, 0xfb, 0x74, 0x4f, 0x9d, 0x52, 0xa5, 0xf8, 0x39, 0xec, 0xd3,
+	0xa5, 0x5c, 0x9f, 0xde, 0xc0, 0x47, 0x70, 0x2e, 0x73, 0x90, 0x89, 0xf2, 0x8b, 0x34, 0x53, 0x19,
+	0xbf, 0xb5, 0x19, 0x51, 0xaa, 0x64, 0x29, 0x33, 0xa2, 0x74, 0xfd, 0x5f, 0x35, 0xa8, 0x1d, 0x1e,
+	0x6e, 0x6d, 0x89, 0x30, 0xe8, 0x33, 0xf2, 0x7b, 0x0b, 0xc8, 0xd5, 0xb7, 0x15, 0xf9, 0xa8, 0x38,
+	0x61, 0xa7, 0x3f, 0x10, 0x9d, 0x8f, 0xe7, 0x44, 0x99, 0xb6, 0xf9, 0x15, 0x2c, 0xaa, 0x91, 0x8d,
+	0xfc, 0xf4, 0x86, 0xa3, 0xb6, 0xd3, 0x9e, 0xcd, 0x68, 0x64, 0x77, 0xa1, 0x9a, 0x8d, 0x3d, 0xe4,
+	0x41, 0xa1, 0x7a, 0x63, 0x53, 0x9d, 0xf3, 0xfe, 0x8d, 0x78, 0xcd, 0x21, 0xbf, 0x81, 0x8a, 0x99,
+	0x66, 0xc8, 0xfd, 0x19, 0xb8, 0xd1, 0x5c, 0xe5, 0x3c, 0xb8, 0x09, 0xeb, 0xc8, 0x8c, 0x6c, 0x6a,
+	0x29, 0x34, 0x63, 0x62, 0x26, 0x2a, 0x34, 0xe3, 0xca, 0x18, 0xf4, 0x0c, 0xca, 0x38, 0xde, 0x90,
+	0xa2, 0x6b, 0x9e, 0x9b, 0x7f, 0x9c, 0xa2, 0x70, 0x8d, 0xcd, 0x45, 0xbf, 0xc6, 0x72, 0xa8, 0x9e,
+	0x88, 0xc5, 0x85, 0x30, 0xf7, 0x9f, 0x8e, 0x73, 0xff, 0x06, 0x9c, 0x23, 0xf1, 0xe6, 0x79, 0xd5,
+	0xbe, 0xc1, 0x1f, 0x2b, 0xb3, 0xc5, 0x4f, 0xfc, 0x85, 0xc3, 0xa1, 0x91, 0xef, 0x72, 0xc4, 0x2b,
+	0x80, 0x4e, 0x19, 0x10, 0x9c, 0xce, 0x8d, 0xf9, 0xcd, 0x81, 0xdf, 0xe2, 0xa8, 0x3e, 0xde, 0x01,
+	0xc9, 0x7a, 0xa1, 0x3b, 0xa6, 0xf6, 0x5a, 0xe7, 0xe1, 0x5c, 0x18, 0x73, 0xb8, 0xaf, 0x3b, 0xac,
+	0xe9, 0xa2, 0xa4, 0xb8, 0x61, 0x0c, 0x3b, 0xb1, 0x73, 0x43, 0xbe, 0xb6, 0xf5, 0xa1, 0x85, 0x79,
+	0x86, 0x93, 0x55, 0xa1, 0xec, 0xdc, 0xc8, 0x59, 0x98, 0x67, 0xf9, 0x11, 0x6d, 0xab, 0xf1, 0xdd,
+	0xeb, 0x7b, 0xd6, 0x3f, 0x5f, 0xdf, 0xb3, 0xfe, 0xf3, 0xfa, 0x9e, 0x75, 0xb6, 0xa4, 0xfe, 0x2f,
+	0x7f, 0xf8, 0xff, 0x00, 0x00, 0x00, 0xff, 0xff, 0x8b, 0x9a, 0x89, 0x6b, 0x81, 0x18, 0x00, 0x00,
 }
 
 // Reference imports to suppress errors if they are not otherwise used.
@@ -4064,7 +4072,7 @@ func (m *WarnRequest) MarshalToSizedBuffer(dAtA []byte) (int, error) {
 				i = encodeVarintGateway(dAtA, i, uint64(size))
 			}
 			i--
-			dAtA[i] = 0x32
+			dAtA[i] = 0x3a
 		}
 	}
 	if m.Info != nil {
@@ -4077,14 +4085,23 @@ func (m *WarnRequest) MarshalToSizedBuffer(dAtA []byte) (int, error) {
 			i = encodeVarintGateway(dAtA, i, uint64(size))
 		}
 		i--
+		dAtA[i] = 0x32
+	}
+	if len(m.Url) > 0 {
+		i -= len(m.Url)
+		copy(dAtA[i:], m.Url)
+		i = encodeVarintGateway(dAtA, i, uint64(len(m.Url)))
+		i--
 		dAtA[i] = 0x2a
 	}
 	if len(m.Detail) > 0 {
-		i -= len(m.Detail)
-		copy(dAtA[i:], m.Detail)
-		i = encodeVarintGateway(dAtA, i, uint64(len(m.Detail)))
-		i--
-		dAtA[i] = 0x22
+		for iNdEx := len(m.Detail) - 1; iNdEx >= 0; iNdEx-- {
+			i -= len(m.Detail[iNdEx])
+			copy(dAtA[i:], m.Detail[iNdEx])
+			i = encodeVarintGateway(dAtA, i, uint64(len(m.Detail[iNdEx])))
+			i--
+			dAtA[i] = 0x22
+		}
 	}
 	if len(m.Short) > 0 {
 		i -= len(m.Short)
@@ -5320,7 +5337,13 @@ func (m *WarnRequest) Size() (n int) {
 	if l > 0 {
 		n += 1 + l + sovGateway(uint64(l))
 	}
-	l = len(m.Detail)
+	if len(m.Detail) > 0 {
+		for _, b := range m.Detail {
+			l = len(b)
+			n += 1 + l + sovGateway(uint64(l))
+		}
+	}
+	l = len(m.Url)
 	if l > 0 {
 		n += 1 + l + sovGateway(uint64(l))
 	}
@@ -9132,12 +9155,42 @@ func (m *WarnRequest) Unmarshal(dAtA []byte) error {
 			if postIndex > l {
 				return io.ErrUnexpectedEOF
 			}
-			m.Detail = append(m.Detail[:0], dAtA[iNdEx:postIndex]...)
-			if m.Detail == nil {
-				m.Detail = []byte{}
-			}
+			m.Detail = append(m.Detail, make([]byte, postIndex-iNdEx))
+			copy(m.Detail[len(m.Detail)-1], dAtA[iNdEx:postIndex])
 			iNdEx = postIndex
 		case 5:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field Url", wireType)
+			}
+			var stringLen uint64
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowGateway
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				stringLen |= uint64(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			intStringLen := int(stringLen)
+			if intStringLen < 0 {
+				return ErrInvalidLengthGateway
+			}
+			postIndex := iNdEx + intStringLen
+			if postIndex < 0 {
+				return ErrInvalidLengthGateway
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.Url = string(dAtA[iNdEx:postIndex])
+			iNdEx = postIndex
+		case 6:
 			if wireType != 2 {
 				return fmt.Errorf("proto: wrong wireType = %d for field Info", wireType)
 			}
@@ -9173,7 +9226,7 @@ func (m *WarnRequest) Unmarshal(dAtA []byte) error {
 				return err
 			}
 			iNdEx = postIndex
-		case 6:
+		case 7:
 			if wireType != 2 {
 				return fmt.Errorf("proto: wrong wireType = %d for field Ranges", wireType)
 			}
diff --git a/frontend/gateway/pb/gateway.proto b/frontend/gateway/pb/gateway.proto
index 0bef68729ba7..388a46ef718d 100644
--- a/frontend/gateway/pb/gateway.proto
+++ b/frontend/gateway/pb/gateway.proto
@@ -174,12 +174,13 @@ message PongResponse{
 }
 
 message WarnRequest {
-	string Digest = 1 [(gogoproto.customtype) = "github.com/opencontainers/go-digest.Digest", (gogoproto.nullable) = false];
-	int64 Level = 2;
-	bytes Short = 3;
-	bytes Detail = 4;
-	pb.SourceInfo info = 5;
-	repeated pb.Range ranges = 6;
+	string digest = 1 [(gogoproto.customtype) = "github.com/opencontainers/go-digest.Digest", (gogoproto.nullable) = false];
+	int64 level = 2;
+	bytes short = 3;
+	repeated bytes detail = 4;
+	string url = 5;
+	pb.SourceInfo info = 6;
+	repeated pb.Range ranges = 7;
 }
 
 message WarnResponse{}
diff --git a/solver/llbsolver/bridge.go b/solver/llbsolver/bridge.go
index 4b6007a92250..1473968828ba 100644
--- a/solver/llbsolver/bridge.go
+++ b/solver/llbsolver/bridge.go
@@ -56,6 +56,7 @@ func (b *llbBridge) Warn(ctx context.Context, dgst digest.Digest, msg string, op
 			SourceInfo: opts.SourceInfo,
 			Range:      opts.Range,
 			Detail:     opts.Detail,
+			URL:        opts.URL,
 		})
 		return pw.Close()
 	})