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xemu/tests/qemu-iotests/153.out
Eric Blake 64ebf55648 qemu-io: Don't die on second open 
Most callback commands in qemu-io return 0 to keep the interpreter
loop running, or 1 to quit immediately.  However, open_f() just
passed through the return value of openfile(), which has different
semantics of returning 0 if a file was opened, or 1 on any failure.

As a result of mixing the return semantics, we are forcing the
qemu-io interpreter to exit early on any failures, which is rather
annoying when some of the failures are obviously trying to give
the user a hint of how to proceed (if we didn't then kill qemu-io
out from under the user's feet):

$ qemu-io
qemu-io> open foo
qemu-io> open foo
file open already, try 'help close'
$ echo $?
0

In general, we WANT openfile() to report failures, since it is the
function used in the form 'qemu-io -c "$something" no_such_file'
for performing one or more -c options on a single file, and it is
not worth attempting $something if the file itself cannot be opened.
So the solution is to fix open_f() to always return 0 (when we are
in interactive mode, even failure to open should not end the
session), and save the return value of openfile() for command line
use in main().

Note, however, that we do have some qemu-iotests that do 'qemu-io
-c "open file" -c "$something"'; such tests will now proceed to
attempt $something whether or not the open succeeded, the same way
as if the two commands had been attempted in interactive mode.  As
such, the expected output for those tests has to be modified.  But it
also means that it is now possible to use -c close and have a single
qemu-io command line operate on more than one file even without
using interactive mode.  Although the '-c open' action is a subtle
change in behavior, remember that qemu-io is for debugging purposes,
so as long as it serves the needs of qemu-iotests while still being
reasonable for interactive use, it should not be a problem that we
are changing tests to the new behavior.

This has been awkward since at least as far back as commit
e3aff4f, in 2009.

Signed-off-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Fam Zheng <famz@redhat.com>
Reviewed-by: John Snow <jsnow@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2017-07-10 13:18:05 +02:00

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QA output created by 153
== readonly=off,force-share=on should be rejected ==
QEMU_PROG: -drive if=none,file=null-co://,readonly=off,force-share=on: force-share=on can only be used with read-only images
== Creating base image ==
Formatting 'TEST_DIR/t.IMGFMT.base', fmt=IMGFMT size=33554432
== Creating test image ==
Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=33554432 backing_file=TEST_DIR/t.IMGFMT.base
== Launching QEMU, opts: '' ==
== Launching another QEMU, opts: '' ==
QEMU_PROG: -drive file=TEST_DIR/t.qcow2,if=none,: Failed to get "write" lock
Is another process using the image?
== Launching another QEMU, opts: 'read-only=on' ==
QEMU_PROG: -drive file=TEST_DIR/t.qcow2,if=none,read-only=on: Failed to get shared "write" lock
Is another process using the image?
== Launching another QEMU, opts: 'read-only=on,force-share=on' ==
== Running utility commands ==
_qemu_io_wrapper -c read 0 512 TEST_DIR/t.qcow2
can't open device TEST_DIR/t.qcow2: Failed to get "write" lock
Is another process using the image?
_qemu_io_wrapper -r -c read 0 512 TEST_DIR/t.qcow2
can't open device TEST_DIR/t.qcow2: Failed to get shared "write" lock
Is another process using the image?
_qemu_io_wrapper -c open TEST_DIR/t.qcow2 -c read 0 512
can't open device TEST_DIR/t.qcow2: Failed to get "write" lock
Is another process using the image?
no file open, try 'help open'
_qemu_io_wrapper -c open -r TEST_DIR/t.qcow2 -c read 0 512
can't open device TEST_DIR/t.qcow2: Failed to get shared "write" lock
Is another process using the image?
no file open, try 'help open'
_qemu_img_wrapper info TEST_DIR/t.qcow2
qemu-img: Could not open 'TEST_DIR/t.qcow2': Failed to get shared "write" lock
Is another process using the image?
_qemu_img_wrapper check TEST_DIR/t.qcow2
qemu-img: Could not open 'TEST_DIR/t.qcow2': Failed to get shared "write" lock
Is another process using the image?
_qemu_img_wrapper compare TEST_DIR/t.qcow2 TEST_DIR/t.qcow2
qemu-img: Could not open 'TEST_DIR/t.qcow2': Failed to get shared "write" lock
Is another process using the image?
_qemu_img_wrapper map TEST_DIR/t.qcow2
qemu-img: Could not open 'TEST_DIR/t.qcow2': Failed to get shared "write" lock
Is another process using the image?
_qemu_img_wrapper amend -o TEST_DIR/t.qcow2
qemu-img: Could not open 'TEST_DIR/t.qcow2': Failed to get "write" lock
Is another process using the image?
_qemu_img_wrapper commit TEST_DIR/t.qcow2
qemu-img: Could not open 'TEST_DIR/t.qcow2': Failed to get "write" lock
Is another process using the image?
_qemu_img_wrapper resize TEST_DIR/t.qcow2 32M
qemu-img: Could not open 'TEST_DIR/t.qcow2': Failed to get "write" lock
Is another process using the image?
_qemu_img_wrapper rebase TEST_DIR/t.qcow2 -b TEST_DIR/t.qcow2.base
qemu-img: Could not open 'TEST_DIR/t.qcow2': Failed to get "write" lock
Is another process using the image?
_qemu_img_wrapper snapshot -l TEST_DIR/t.qcow2
qemu-img: Could not open 'TEST_DIR/t.qcow2': Failed to get shared "write" lock
Is another process using the image?
_qemu_img_wrapper convert TEST_DIR/t.qcow2 TEST_DIR/t.qcow2.convert
qemu-img: Could not open 'TEST_DIR/t.qcow2': Failed to get shared "write" lock
Is another process using the image?
_qemu_img_wrapper dd if=TEST_DIR/t.qcow2 of=TEST_DIR/t.qcow2.convert bs=512 count=1
qemu-img: Could not open 'TEST_DIR/t.qcow2': Failed to get shared "write" lock
Is another process using the image?
_qemu_img_wrapper bench -c 1 TEST_DIR/t.qcow2
qemu-img: Could not open 'TEST_DIR/t.qcow2': Failed to get shared "write" lock
Is another process using the image?
_qemu_img_wrapper bench -w -c 1 TEST_DIR/t.qcow2
qemu-img: Could not open 'TEST_DIR/t.qcow2': Failed to get "write" lock
Is another process using the image?
== Running utility commands -U ==
_qemu_io_wrapper -U -c read 0 512 TEST_DIR/t.qcow2
can't open device TEST_DIR/t.qcow2: force-share=on can only be used with read-only images
_qemu_io_wrapper -U -r -c read 0 512 TEST_DIR/t.qcow2
_qemu_io_wrapper -c open -U TEST_DIR/t.qcow2 -c read 0 512
can't open device TEST_DIR/t.qcow2: force-share=on can only be used with read-only images
no file open, try 'help open'
_qemu_io_wrapper -c open -r -U TEST_DIR/t.qcow2 -c read 0 512
_qemu_img_wrapper info -U TEST_DIR/t.qcow2
_qemu_img_wrapper check -U TEST_DIR/t.qcow2
_qemu_img_wrapper compare -U TEST_DIR/t.qcow2 TEST_DIR/t.qcow2
_qemu_img_wrapper map -U TEST_DIR/t.qcow2
_qemu_img_wrapper amend -o -U TEST_DIR/t.qcow2
qemu-img: unrecognized option '-U'
Try 'qemu-img --help' for more information
_qemu_img_wrapper commit -U TEST_DIR/t.qcow2
qemu-img: unrecognized option '-U'
Try 'qemu-img --help' for more information
_qemu_img_wrapper resize -U TEST_DIR/t.qcow2 32M
qemu-img: unrecognized option '-U'
Try 'qemu-img --help' for more information
_qemu_img_wrapper rebase -U TEST_DIR/t.qcow2 -b TEST_DIR/t.qcow2.base
qemu-img: Could not open 'TEST_DIR/t.qcow2': Failed to get "write" lock
Is another process using the image?
_qemu_img_wrapper snapshot -l -U TEST_DIR/t.qcow2
_qemu_img_wrapper convert -U TEST_DIR/t.qcow2 TEST_DIR/t.qcow2.convert
_qemu_img_wrapper dd -U if=TEST_DIR/t.qcow2 of=TEST_DIR/t.qcow2.convert bs=512 count=1
_qemu_img_wrapper bench -U -c 1 TEST_DIR/t.qcow2
_qemu_img_wrapper bench -U -w -c 1 TEST_DIR/t.qcow2
qemu-img: Could not open 'TEST_DIR/t.qcow2': force-share=on can only be used with read-only images
Round done
== Creating base image ==
Formatting 'TEST_DIR/t.IMGFMT.base', fmt=IMGFMT size=33554432
== Creating test image ==
Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=33554432 backing_file=TEST_DIR/t.IMGFMT.base
== Launching QEMU, opts: 'read-only=on' ==
== Launching another QEMU, opts: '' ==
QEMU_PROG: -drive file=TEST_DIR/t.qcow2,if=none,: Failed to get "write" lock
Is another process using the image?
== Launching another QEMU, opts: 'read-only=on' ==
== Launching another QEMU, opts: 'read-only=on,force-share=on' ==
== Running utility commands ==
_qemu_io_wrapper -c read 0 512 TEST_DIR/t.qcow2
can't open device TEST_DIR/t.qcow2: Failed to get "write" lock
Is another process using the image?
_qemu_io_wrapper -r -c read 0 512 TEST_DIR/t.qcow2
_qemu_io_wrapper -c open TEST_DIR/t.qcow2 -c read 0 512
can't open device TEST_DIR/t.qcow2: Failed to get "write" lock
Is another process using the image?
no file open, try 'help open'
_qemu_io_wrapper -c open -r TEST_DIR/t.qcow2 -c read 0 512
_qemu_img_wrapper info TEST_DIR/t.qcow2
_qemu_img_wrapper check TEST_DIR/t.qcow2
_qemu_img_wrapper compare TEST_DIR/t.qcow2 TEST_DIR/t.qcow2
_qemu_img_wrapper map TEST_DIR/t.qcow2
_qemu_img_wrapper amend -o TEST_DIR/t.qcow2
qemu-img: Could not open 'TEST_DIR/t.qcow2': Failed to get "write" lock
Is another process using the image?
_qemu_img_wrapper commit TEST_DIR/t.qcow2
qemu-img: Could not open 'TEST_DIR/t.qcow2': Failed to get "write" lock
Is another process using the image?
_qemu_img_wrapper resize TEST_DIR/t.qcow2 32M
qemu-img: Could not open 'TEST_DIR/t.qcow2': Failed to get "write" lock
Is another process using the image?
_qemu_img_wrapper rebase TEST_DIR/t.qcow2 -b TEST_DIR/t.qcow2.base
qemu-img: Could not open 'TEST_DIR/t.qcow2': Failed to get "write" lock
Is another process using the image?
_qemu_img_wrapper snapshot -l TEST_DIR/t.qcow2
_qemu_img_wrapper convert TEST_DIR/t.qcow2 TEST_DIR/t.qcow2.convert
_qemu_img_wrapper dd if=TEST_DIR/t.qcow2 of=TEST_DIR/t.qcow2.convert bs=512 count=1
_qemu_img_wrapper bench -c 1 TEST_DIR/t.qcow2
_qemu_img_wrapper bench -w -c 1 TEST_DIR/t.qcow2
qemu-img: Could not open 'TEST_DIR/t.qcow2': Failed to get "write" lock
Is another process using the image?
== Running utility commands -U ==
_qemu_io_wrapper -U -c read 0 512 TEST_DIR/t.qcow2
can't open device TEST_DIR/t.qcow2: force-share=on can only be used with read-only images
_qemu_io_wrapper -U -r -c read 0 512 TEST_DIR/t.qcow2
_qemu_io_wrapper -c open -U TEST_DIR/t.qcow2 -c read 0 512
can't open device TEST_DIR/t.qcow2: force-share=on can only be used with read-only images
no file open, try 'help open'
_qemu_io_wrapper -c open -r -U TEST_DIR/t.qcow2 -c read 0 512
_qemu_img_wrapper info -U TEST_DIR/t.qcow2
_qemu_img_wrapper check -U TEST_DIR/t.qcow2
_qemu_img_wrapper compare -U TEST_DIR/t.qcow2 TEST_DIR/t.qcow2
_qemu_img_wrapper map -U TEST_DIR/t.qcow2
_qemu_img_wrapper amend -o -U TEST_DIR/t.qcow2
qemu-img: unrecognized option '-U'
Try 'qemu-img --help' for more information
_qemu_img_wrapper commit -U TEST_DIR/t.qcow2
qemu-img: unrecognized option '-U'
Try 'qemu-img --help' for more information
_qemu_img_wrapper resize -U TEST_DIR/t.qcow2 32M
qemu-img: unrecognized option '-U'
Try 'qemu-img --help' for more information
_qemu_img_wrapper rebase -U TEST_DIR/t.qcow2 -b TEST_DIR/t.qcow2.base
qemu-img: Could not open 'TEST_DIR/t.qcow2': Failed to get "write" lock
Is another process using the image?
_qemu_img_wrapper snapshot -l -U TEST_DIR/t.qcow2
_qemu_img_wrapper convert -U TEST_DIR/t.qcow2 TEST_DIR/t.qcow2.convert
_qemu_img_wrapper dd -U if=TEST_DIR/t.qcow2 of=TEST_DIR/t.qcow2.convert bs=512 count=1
_qemu_img_wrapper bench -U -c 1 TEST_DIR/t.qcow2
_qemu_img_wrapper bench -U -w -c 1 TEST_DIR/t.qcow2
qemu-img: Could not open 'TEST_DIR/t.qcow2': force-share=on can only be used with read-only images
Round done
== Creating base image ==
Formatting 'TEST_DIR/t.IMGFMT.base', fmt=IMGFMT size=33554432
== Creating test image ==
Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=33554432 backing_file=TEST_DIR/t.IMGFMT.base
== Launching QEMU, opts: 'read-only=on,force-share=on' ==
== Launching another QEMU, opts: '' ==
== Launching another QEMU, opts: 'read-only=on' ==
== Launching another QEMU, opts: 'read-only=on,force-share=on' ==
== Running utility commands ==
_qemu_io_wrapper -c read 0 512 TEST_DIR/t.qcow2
_qemu_io_wrapper -r -c read 0 512 TEST_DIR/t.qcow2
_qemu_io_wrapper -c open TEST_DIR/t.qcow2 -c read 0 512
_qemu_io_wrapper -c open -r TEST_DIR/t.qcow2 -c read 0 512
_qemu_img_wrapper info TEST_DIR/t.qcow2
_qemu_img_wrapper check TEST_DIR/t.qcow2
_qemu_img_wrapper compare TEST_DIR/t.qcow2 TEST_DIR/t.qcow2
_qemu_img_wrapper map TEST_DIR/t.qcow2
_qemu_img_wrapper amend -o TEST_DIR/t.qcow2
_qemu_img_wrapper commit TEST_DIR/t.qcow2
_qemu_img_wrapper resize TEST_DIR/t.qcow2 32M
_qemu_img_wrapper rebase TEST_DIR/t.qcow2 -b TEST_DIR/t.qcow2.base
_qemu_img_wrapper snapshot -l TEST_DIR/t.qcow2
_qemu_img_wrapper convert TEST_DIR/t.qcow2 TEST_DIR/t.qcow2.convert
_qemu_img_wrapper dd if=TEST_DIR/t.qcow2 of=TEST_DIR/t.qcow2.convert bs=512 count=1
_qemu_img_wrapper bench -c 1 TEST_DIR/t.qcow2
_qemu_img_wrapper bench -w -c 1 TEST_DIR/t.qcow2
== Running utility commands -U ==
_qemu_io_wrapper -U -c read 0 512 TEST_DIR/t.qcow2
can't open device TEST_DIR/t.qcow2: force-share=on can only be used with read-only images
_qemu_io_wrapper -U -r -c read 0 512 TEST_DIR/t.qcow2
_qemu_io_wrapper -c open -U TEST_DIR/t.qcow2 -c read 0 512
can't open device TEST_DIR/t.qcow2: force-share=on can only be used with read-only images
no file open, try 'help open'
_qemu_io_wrapper -c open -r -U TEST_DIR/t.qcow2 -c read 0 512
_qemu_img_wrapper info -U TEST_DIR/t.qcow2
_qemu_img_wrapper check -U TEST_DIR/t.qcow2
_qemu_img_wrapper compare -U TEST_DIR/t.qcow2 TEST_DIR/t.qcow2
_qemu_img_wrapper map -U TEST_DIR/t.qcow2
_qemu_img_wrapper amend -o -U TEST_DIR/t.qcow2
qemu-img: unrecognized option '-U'
Try 'qemu-img --help' for more information
_qemu_img_wrapper commit -U TEST_DIR/t.qcow2
qemu-img: unrecognized option '-U'
Try 'qemu-img --help' for more information
_qemu_img_wrapper resize -U TEST_DIR/t.qcow2 32M
qemu-img: unrecognized option '-U'
Try 'qemu-img --help' for more information
_qemu_img_wrapper rebase -U TEST_DIR/t.qcow2 -b TEST_DIR/t.qcow2.base
_qemu_img_wrapper snapshot -l -U TEST_DIR/t.qcow2
_qemu_img_wrapper convert -U TEST_DIR/t.qcow2 TEST_DIR/t.qcow2.convert
_qemu_img_wrapper dd -U if=TEST_DIR/t.qcow2 of=TEST_DIR/t.qcow2.convert bs=512 count=1
_qemu_img_wrapper bench -U -c 1 TEST_DIR/t.qcow2
_qemu_img_wrapper bench -U -w -c 1 TEST_DIR/t.qcow2
qemu-img: Could not open 'TEST_DIR/t.qcow2': force-share=on can only be used with read-only images
Round done
== Creating TEST_DIR/t.qcow2.[abc] ==
Formatting 'TEST_DIR/t.IMGFMT.a', fmt=IMGFMT size=33554432 backing_file=TEST_DIR/t.IMGFMT
Formatting 'TEST_DIR/t.IMGFMT.b', fmt=IMGFMT size=33554432 backing_file=TEST_DIR/t.IMGFMT
Formatting 'TEST_DIR/t.IMGFMT.c', fmt=IMGFMT size=33554432 backing_file=TEST_DIR/t.IMGFMT.b
== Two devices sharing the same file in backing chain ==
== Backing image also as an active device ==
QEMU_PROG: -drive if=none,file=TEST_DIR/t.qcow2: Failed to get "write" lock
Is another process using the image?
== Backing image also as an active device (ro) ==
== Symbolic link ==
QEMU_PROG: -drive if=none,file=TEST_DIR/t.qcow2: Failed to get "write" lock
Is another process using the image?
== Closing an image should unlock it ==
{"return": {}}
Adding drive
_qemu_io_wrapper TEST_DIR/t.qcow2 -c write 0 512
can't open device TEST_DIR/t.qcow2: Failed to get "write" lock
Is another process using the image?
Closing drive
_qemu_io_wrapper TEST_DIR/t.qcow2 -c write 0 512
Adding two and closing one
_qemu_img_wrapper info TEST_DIR/t.qcow2
_qemu_io_wrapper TEST_DIR/t.qcow2 -c write 0 512
can't open device TEST_DIR/t.qcow2: Failed to get "write" lock
Is another process using the image?
Closing the other
_qemu_io_wrapper TEST_DIR/t.qcow2 -c write 0 512
*** done
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