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
|
=head1 NAME
nbd_set_request_extended_headers - control use of extended headers
=head1 SYNOPSIS
#include <libnbd.h>
int nbd_set_request_extended_headers (
struct nbd_handle *h, bool request
);
=head1 DESCRIPTION
By default, libnbd tries to negotiate extended headers with the
server, as this protocol extension permits the use of 64-bit
zero, trim, and block status actions. However,
for integration testing, it can be useful to clear this flag
rather than find a way to alter the server to fail the negotiation
request.
For backwards compatibility, the setting of this knob is ignored
if L<nbd_set_request_structured_replies(3)> is also set to false,
since the use of extended headers implies structured replies.
=head1 RETURN VALUE
If the call is successful the function returns C<0>.
=head1 ERRORS
On error C<-1> is returned.
Refer to L<libnbd(3)/ERROR HANDLING>
for how to get further details of the error.
The following parameters must not be NULL: C<h>.
For more information see L<libnbd(3)/Non-NULL parameters>.
=head1 HANDLE STATE
nbd_set_request_extended_headers
can be called when the handle is in the following state:
┌─────────────────────────────────────┬─────────────────────────┐
│ Handle created, before connecting │ ✅ allowed │
│ Connecting │ ❌ error │
│ Connecting & handshaking (opt_mode) │ ❌ error │
│ Connected to the server │ ❌ error │
│ Connection shut down │ ❌ error │
│ Handle dead │ ❌ error │
└─────────────────────────────────────┴─────────────────────────┘
=head1 VERSION
This function first appeared in libnbd 1.18.
If you need to test if this function is available at compile time
check if the following macro is defined:
#define LIBNBD_HAVE_NBD_SET_REQUEST_EXTENDED_HEADERS 1
=head1 SEE ALSO
L<nbd_block_status_64(3)>,
L<nbd_cache(3)>,
L<nbd_create(3)>,
L<nbd_get_extended_headers_negotiated(3)>,
L<nbd_get_request_extended_headers(3)>,
L<nbd_opt_extended_headers(3)>,
L<nbd_set_handshake_flags(3)>,
L<nbd_set_request_structured_replies(3)>,
L<nbd_set_strict_mode(3)>,
L<nbd_trim(3)>,
L<nbd_zero(3)>,
L<libnbd(3)>.
=head1 AUTHORS
Eric Blake
Richard W.M. Jones
=head1 COPYRIGHT
Copyright Red Hat
|
