1nbd_aio_opt_list(3)                 LIBNBD                 nbd_aio_opt_list(3)
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NAME

6       nbd_aio_opt_list - request the server to list all exports during
7       negotiation
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SYNOPSIS

10        #include <libnbd.h>
11
12        typedef struct {
13          int (*callback) (void *user_data, const char *name,
14                           const char *description);
15          void *user_data;
16          void (*free) (void *user_data);
17        } nbd_list_callback;
18
19        typedef struct {
20          int (*callback) (void *user_data, int *error);
21          void *user_data;
22          void (*free) (void *user_data);
23        } nbd_completion_callback;
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25        int nbd_aio_opt_list (struct nbd_handle *h,
26                              nbd_list_callback list_callback,
27                              nbd_completion_callback completion_callback);
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DESCRIPTION

30       Request that the server list all exports that it supports.  This can
31       only be used if nbd_set_opt_mode(3) enabled option mode.
32
33       To determine when the request completes, wait for
34       nbd_aio_is_connecting(3) to return false.  Or supply the optional
35       "completion_callback" which will be invoked as described in "Completion
36       callbacks" in libnbd(3), except that it is automatically retired
37       regardless of return value.  Note that detecting whether the server
38       returns an error (as is done by the return value of the synchronous
39       counterpart) is only possible with a completion callback.
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RETURN VALUE

42       If the call is successful the function returns 0.
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ERRORS

45       On error "-1" is returned.
46
47       Refer to "ERROR HANDLING" in libnbd(3) for how to get further details
48       of the error.
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HANDLE STATE

51       The handle must be negotiating, otherwise this call will return an
52       error.
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VERSION

55       This function first appeared in libnbd 1.4.
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57       If you need to test if this function is available at compile time check
58       if the following macro is defined:
59
60        #define LIBNBD_HAVE_NBD_AIO_OPT_LIST 1
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SEE ALSO

63       nbd_aio_is_connecting(3), nbd_create(3), nbd_opt_list(3),
64       nbd_set_opt_mode(3), libnbd(3).
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AUTHORS

67       Eric Blake
68
69       Richard W.M. Jones
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72       Copyright (C) 2019-2021 Red Hat Inc.
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LICENSE

75       This library is free software; you can redistribute it and/or modify it
76       under the terms of the GNU Lesser General Public License as published
77       by the Free Software Foundation; either version 2 of the License, or
78       (at your option) any later version.
79
80       This library is distributed in the hope that it will be useful, but
81       WITHOUT ANY WARRANTY; without even the implied warranty of
82       MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
83       Lesser General Public License for more details.
84
85       You should have received a copy of the GNU Lesser General Public
86       License along with this library; if not, write to the Free Software
87       Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
88       02110-1301 USA
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92libnbd-1.7.12                     2021-05-29               nbd_aio_opt_list(3)
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