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curl: Fix hang reading from slow connections

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When receiving a new aio read request, we first look for an existing
transaction whose range will cover the read request by the time it
completes. However, we weren't checking that the existing transaction
was still active. If it had timed out, we were adding the request to a
transaction which would never complete and had already been cancelled,
resulting in a hang.

Signed-off-by: Matthew Booth <mbooth@redhat.com>
Tested-by: Richard W.M. Jones <rjones@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Matthew Booth 2014-04-29 16:03:32 +01:00 • committed by Kevin Wolf
parent 1f2cead324
commit b7079df410
1 changed files with 2 additions and 1 deletions
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3
block/curl.c
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@ -220,7 +220,8 @@ static int curl_find_buf(BDRVCURLState *s, size_t start, size_t len,
}
// Wait for unfinished chunks
if ((start >= state->buf_start) &&
if (state->in_use &&
(start >= state->buf_start) &&
(start <= buf_fend) &&
(end >= state->buf_start) &&
(end <= buf_fend))