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As a previous, incorrect attempt to fix RHBZ#576879 we tried to
prevent the daemon from sending an error reply if the daemon had
cancelled the transfer. This is wrong: the daemon should send an
error reply in these cases.
A simple test case is this:
guestfish -N fs -m /dev/sda1 upload big-file /
(This fails because the target "/" is a directory, not a file.)
Prior to this commit, libguestfs would hang instead of printing an
error. With this commit, libguestfs prints an error.
What is happening is:
(1) Library is uploading
a file (2) In the middle of the long
upload, daemon detects an error.
Daemon cancels.
(3) Library detects cancel,
sends cancel chunk, then waits
for the error reply from the
daemon. (4) Daemon is supposed to send
an error reply message.
Because step (4) wasn't happening, uploads that failed like this would
hang in the library (waiting for the error message, while the daemon
was waiting for the next request).
This also adds a regression test.
This temporarily breaks the "both ends cancel" case (RHBZ#576879c5).
Therefore the test for that is disabled, and this is fixed in the next
patch in the series.
This partially reverts commit dc706a639eec16084c0618baf7bfde00c6565f63.
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We suspect that there are in fact two separate bugs. In any
case it makes sense for the two tests to be done separately.
Note that these tests still fail.
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This test has worked only intermittently for a while. Disable
it. The upstream bug has been reopened.
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This test has started to hang, for reasons we don't understand.
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During a FileIn command (eg. upload, tar-in) if both sides
experience errors, then both sides could send cancel messages,
the result being lost synchronization.
The reason for the lost synch was because the daemon was ignoring
this case and sending an error message back which the library side
(which had cancelled) was not expecting.
Fix this by checking in the daemon for the case where the library
also cancels during daemon cancellation, and not sending an error
messages.
This also includes an enhanced regression test which checks for this
case.
This extends the original fix in
commit 5922d7084d6b43f0a1a15b664c7082dfeaf584d0.
More details can be found here:
https://bugzilla.redhat.com/show_bug.cgi?id=576879#c5
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Previously you might have typed:
$ guestfish
><fs> alloc test1.img 100M
><fs> run
><fs> part-disk /dev/sda mbr
><fs> mkfs ext4 /dev/sda1
now you can do the same with:
$ guestfish -N fs:ext4
Some tests have also been updated to use this new
functionality.
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Modify the generator so that it can correctly handle early
cancellation for Pathname|Device|.. parameters. This fixes
the upload command, but consequently we need to fix the
parameters for tar_in and t?z_in commands. This should also
mean that 'win:' can now be used as the second argument of
tar_in and t?z_in commands in guestfish, whereas previously
this wouldn't have worked.
Adds a regression test for the original problem.
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