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authorNicholas Thomas <nick@bytemark.co.uk>2011-08-15 10:00:34 +0100
committerKevin Wolf <kwolf@redhat.com>2011-08-23 17:41:14 +0200
commitf785a5ae36c92fbeb8e0e8c9d71f5789cbce8b29 (patch)
tree77e2070775dbbe899b23f91b60e26761750968a3 /cpus.h
parent3fba9d8198a50f69e80aba8458d26cf1654e6e26 (diff)
block/curl: Handle failed reads gracefully.
Current behaviour if a read fails is for the acb to not get finished. This causes an infinite loop in bdrv_read_em (block.c). The read failure never gets reported to the guest and if the error condition clears, the process never recovers. With this patch, when curl reports a failure we finish the acb as a failure. This results in the guest receiving an I/O error (rather than the read hanging indefinitely) and if the error condition subsequently clears, retries work as expected. The simplest test is to put an ISO on a web server you have control over and open it with qemu-io. Then move the ISO out of the way and attempt to read some data - you should see behaviour matching the above. Signed-off-by: Nick Thomas <nick@bytemark.co.uk> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'cpus.h')
0 files changed, 0 insertions, 0 deletions