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virStreamSparseSendAll: Reset @want in each iteration

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There's a slight problem with the current function. Assume we are
currently in a data section and we have say 42 bytes until next
section. Therefore, just before (handler) is called to fill up
the buffer with data, @want is changed to 42 to match the amount
of data left in the current section. However, after hole is
processed, we are back in data section but with incredibly small
@want size. Nobody will ever reset it back. This results in
incredible data fragmentation.

Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
This commit is contained in:
Michal Privoznik 2017-05-22 11:44:26 +02:00
parent f9fe0f54ca
commit 9b991d0237
1 changed files with 3 additions and 2 deletions
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5
src/libvirt-stream.c
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@ -698,7 +698,7 @@ int virStreamSparseSendAll(virStreamPtr stream,
void *opaque)
{
char *bytes = NULL;
size_t want = VIR_NET_MESSAGE_LEGACY_PAYLOAD_MAX;
size_t bufLen = VIR_NET_MESSAGE_LEGACY_PAYLOAD_MAX;
int ret = -1;
unsigned long long dataLen = 0;
@ -718,12 +718,13 @@ int virStreamSparseSendAll(virStreamPtr stream,
goto cleanup;
}
if (VIR_ALLOC_N(bytes, want) < 0)
if (VIR_ALLOC_N(bytes, bufLen) < 0)
goto cleanup;
for (;;) {
int inData, got, offset = 0;
long long sectionLen;
size_t want = bufLen;
const unsigned int skipFlags = 0;
if (!dataLen) {