1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
|
package git
import (
"errors"
"fmt"
"io"
"gitlab.com/gitlab-org/gitaly/v15/proto/go/gitalypb"
"google.golang.org/grpc/status"
"gitlab.com/gitlab-org/gitlab/workhorse/internal/log"
)
// For unwrapping google.golang.org/grpc/internal/status.Error
type grpcErr interface {
GRPCStatus() *status.Status
Error() string
}
// For cosmetic purposes in Sentry
type copyError struct{ error }
// handleLimitErr handles errors that come back from Gitaly that may be a
// LimitError. A LimitError is returned by Gitaly when it is at its limit in
// handling requests. Since this is a known error, we should print a sensible
// error message to the end user.
func handleLimitErr(err error, w io.Writer, f func(w io.Writer) error) {
var statusErr grpcErr
if !errors.As(err, &statusErr) {
return
}
if st, ok := status.FromError(statusErr); ok {
details := st.Details()
for _, detail := range details {
switch detail.(type) {
case *gitalypb.LimitError:
if err := f(w); err != nil {
log.WithError(fmt.Errorf("handling limit error: %w", err))
}
}
}
}
}
// writeReceivePackError writes a "server is busy" error message to the
// git-receive-pack-result.
//
// 0023\x01001aunpack server is busy
// 00000044\x2GitLab is currently unable to handle this request due to load.
// 0000
//
// We write a line reporting that unpack failed, and then provide some progress
// information through the side-band 2 channel.
// See https://gitlab.com/gitlab-org/gitaly/-/tree/jc-return-structured-error-limits
// for more details.
func writeReceivePackError(w io.Writer) error {
if _, err := fmt.Fprintf(w, "%04x", 35); err != nil {
return err
}
if _, err := w.Write([]byte{0x01}); err != nil {
return err
}
if _, err := fmt.Fprintf(w, "%04xunpack server is busy\n", 26); err != nil {
return err
}
if _, err := w.Write([]byte("0000")); err != nil {
return err
}
if _, err := fmt.Fprintf(w, "%04x", 68); err != nil {
return err
}
if _, err := w.Write([]byte{0x2}); err != nil {
return err
}
if _, err := fmt.Fprint(w, "GitLab is currently unable to handle this request due to load.\n"); err != nil {
return err
}
if _, err := w.Write([]byte("0000")); err != nil {
return err
}
return nil
}
// writeUploadPackError writes a "server is busy" error message that git
// understands and prints to stdout. UploadPack expects to receive pack data in
// PKT-LINE format. An error-line can be passed that begins with ERR.
// See https://git-scm.com/docs/pack-protocol/2.29.0#_pkt_line_format.
func writeUploadPackError(w io.Writer) error {
_, err := fmt.Fprintf(w, "%04xERR GitLab is currently unable to handle this request due to load.\n", 71)
return err
}
|
