1JOURNAL_EXTEND(9)          The Linux Journalling API         JOURNAL_EXTEND(9)
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NAME

6       journal_extend - extend buffer credits.
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SYNOPSIS

9       int journal_extend(handle_t * handle, int nblocks);
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ARGUMENTS

12       handle
13           handle to 'extend'
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15       nblocks
16           nr blocks to try to extend by.
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DESCRIPTION

19       Some transactions, such as large extends and truncates, can be done
20       atomically all at once or in several stages. The operation requests a
21       credit for a number of buffer modications in advance, but can extend
22       its credit if it needs more.
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24       journal_extend tries to give the running handle more buffer credits. It
25       does not guarantee that allocation - this is a best-effort only. The
26       calling process MUST be able to deal cleanly with a failure to extend
27       here.
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29       Return 0 on success, non-zero on failure.
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31       return code < 0 implies an error return code > 0 implies normal
32       transaction-full status.
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AUTHORS

35       Roger Gammans <rgammans@computer-surgery.co.uk>
36           Author.
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38       Stephen Tweedie <sct@redhat.com>
39           Author.
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42Kernel Hackers Manual 3.10         June 2019                 JOURNAL_EXTEND(9)
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