1nbd_flush(3) LIBNBD nbd_flush(3)
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6 nbd_flush - send flush command to the NBD server
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9 #include <libnbd.h>
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11 int nbd_flush (struct nbd_handle *h, uint32_t flags);
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14 Issue the flush command to the NBD server. The function should return
15 when all write commands which have completed have been committed to
16 permanent storage on the server. Note this will return an error if
17 nbd_can_flush(3) is false.
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19 The "flags" parameter must be 0 for now (it exists for future NBD
20 protocol extensions).
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23 If the call is successful the function returns 0.
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26 On error "-1" is returned.
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28 Refer to "ERROR HANDLING" in libnbd(3) for how to get further details
29 of the error.
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32 The handle must be connected and finished handshaking with the server,
33 otherwise this call will return an error.
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36 This function first appeared in libnbd 1.0.
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38 If you need to test if this function is available at compile time check
39 if the following macro is defined:
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41 #define LIBNBD_HAVE_NBD_FLUSH 1
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44 nbd_aio_flush(3), nbd_can_flush(3), nbd_create(3), libnbd(3).
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47 Eric Blake
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49 Richard W.M. Jones
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52 Copyright (C) 2019 Red Hat Inc.
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55 This library is free software; you can redistribute it and/or modify it
56 under the terms of the GNU Lesser General Public License as published
57 by the Free Software Foundation; either version 2 of the License, or
58 (at your option) any later version.
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60 This library is distributed in the hope that it will be useful, but
61 WITHOUT ANY WARRANTY; without even the implied warranty of
62 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
63 Lesser General Public License for more details.
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65 You should have received a copy of the GNU Lesser General Public
66 License along with this library; if not, write to the Free Software
67 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
68 02110-1301 USA
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72libnbd-1.3.7 2020-04-23 nbd_flush(3)