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export/fuse: Pass default_permissions for mount

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We do not do any permission checks in fuse_open(), so let the kernel do
them.  We already let fuse_getattr() report the proper UNIX permissions,
so this should work the way we want.

This causes a change in 308's reference output, because now opening a
non-writable export with O_RDWR fails already, instead of only actually
attempting to write to it.  (That is an improvement.)

Signed-off-by: Max Reitz <mreitz@redhat.com>
Message-Id: <20210625142317.271673-2-mreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Max Reitz 2021-06-25 16:23:12 +02:00 • committed by Kevin Wolf
parent c2615bdfbd
commit 2c7dd057aa
3 changed files with 9 additions and 4 deletions
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3
tests/qemu-iotests/308
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@ -215,7 +215,8 @@ echo '=== Writable export ==='
fuse_export_add 'export-mp' "'mountpoint': '$EXT_MP', 'writable': true"
# Check that writing to the read-only export fails
$QEMU_IO -f raw -c 'write -P 42 1M 64k' "$TEST_IMG" | _filter_qemu_io
$QEMU_IO -f raw -c 'write -P 42 1M 64k' "$TEST_IMG" 2>&1 \
| _filter_qemu_io | _filter_testdir | _filter_imgfmt
# But here it should work
$QEMU_IO -f raw -c 'write -P 42 1M 64k' "$EXT_MP" | _filter_qemu_io