mirrors/qemu
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

backup: Use real permissions in backup block job

Browse Source 
The backup block job doesn't have very complicated requirements: It
needs to read from the source and write to the target, but it's fine
with either side being changed. The only restriction is that we can't
resize the image because the job uses a cached value.

qemu-iotests 055 needs to be changed because it used a target which was
already attached to a virtio-blk device. The permission system correctly
forbids this (virtio-blk can't accept another writer with its default
share-rw=off).

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Acked-by: Fam Zheng <famz@redhat.com>
This commit is contained in:
Kevin Wolf 2017-01-25 11:39:04 +01:00
parent d3f0675922
commit 4e9e4323d5
2 changed files with 17 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
block/backup.c
View File

@ -618,15 +618,20 @@ BlockJob *backup_job_create(const char *job_id, BlockDriverState *bs,
goto error;
}
/* FIXME Use real permissions */
job = block_job_create(job_id, &backup_job_driver, bs, 0, BLK_PERM_ALL,
/* job->common.len is fixed, so we can't allow resize */
job = block_job_create(job_id, &backup_job_driver, bs,
BLK_PERM_CONSISTENT_READ,
BLK_PERM_CONSISTENT_READ | BLK_PERM_WRITE |
BLK_PERM_WRITE_UNCHANGED | BLK_PERM_GRAPH_MOD,
speed, creation_flags, cb, opaque, errp);
if (!job) {
goto error;
}
/* FIXME Use real permissions */
job->target = blk_new(0, BLK_PERM_ALL);
/* The target must match the source in size, so no resize here either */
job->target = blk_new(BLK_PERM_WRITE,
BLK_PERM_CONSISTENT_READ | BLK_PERM_WRITE |
BLK_PERM_WRITE_UNCHANGED | BLK_PERM_GRAPH_MOD);
ret = blk_insert_bs(job->target, target, errp);
if (ret < 0) {
goto error;
@ -657,7 +662,7 @@ BlockJob *backup_job_create(const char *job_id, BlockDriverState *bs,
job->cluster_size = MAX(BACKUP_CLUSTER_SIZE_DEFAULT, bdi.cluster_size);
}
/* FIXME Use real permissions */
/* Required permissions are already taken with target's blk_new() */
block_job_add_bdrv(&job->common, "target", target, 0, BLK_PERM_ALL,
&error_abort);
job->common.len = len;

11
tests/qemu-iotests/055
View File

@ -48,7 +48,8 @@ class TestSingleDrive(iotests.QMPTestCase):
def setUp(self):
qemu_img('create', '-f', iotests.imgfmt, blockdev_target_img, str(image_len))
self.vm = iotests.VM().add_drive(test_img).add_drive(blockdev_target_img)
self.vm = iotests.VM().add_drive(test_img)
self.vm.add_drive(blockdev_target_img, interface="none")
if iotests.qemu_default_machine == 'pc':
self.vm.add_drive(None, 'media=cdrom', 'ide')
self.vm.launch()
@ -164,7 +165,8 @@ class TestSetSpeed(iotests.QMPTestCase):
def setUp(self):
qemu_img('create', '-f', iotests.imgfmt, blockdev_target_img, str(image_len))
self.vm = iotests.VM().add_drive(test_img).add_drive(blockdev_target_img)
self.vm = iotests.VM().add_drive(test_img)
self.vm.add_drive(blockdev_target_img, interface="none")
self.vm.launch()
def tearDown(self):
@ -247,7 +249,8 @@ class TestSingleTransaction(iotests.QMPTestCase):
def setUp(self):
qemu_img('create', '-f', iotests.imgfmt, blockdev_target_img, str(image_len))
self.vm = iotests.VM().add_drive(test_img).add_drive(blockdev_target_img)
self.vm = iotests.VM().add_drive(test_img)
self.vm.add_drive(blockdev_target_img, interface="none")
if iotests.qemu_default_machine == 'pc':
self.vm.add_drive(None, 'media=cdrom', 'ide')
self.vm.launch()
@ -460,7 +463,7 @@ class TestDriveCompression(iotests.QMPTestCase):
qemu_img('create', '-f', fmt, blockdev_target_img,
str(TestDriveCompression.image_len), *args)
self.vm.add_drive(blockdev_target_img, format=fmt)
self.vm.add_drive(blockdev_target_img, format=fmt, interface="none")
self.vm.launch()