Commit Graph

77034 Commits

Author SHA1 Message Date
Peter Maydell
bffe88d139 Block layer patches:
- Introduce real BdrvChildRole
 - blk/bdrv_make_empty() functions instead of calling callbacks directly
 - mirror: Make sure that source and target size match
 - block-copy: Fix uninitialized variable
 - block/replication: Avoid cancelling the job twice
 - ahci: Log lost IRQs
 - iotests: Run pylint and mypy in a testcase
 - iotests: log messages from notrun()
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Merge remote-tracking branch 'remotes/kevin/tags/for-upstream' into staging

Block layer patches:

- Introduce real BdrvChildRole
- blk/bdrv_make_empty() functions instead of calling callbacks directly
- mirror: Make sure that source and target size match
- block-copy: Fix uninitialized variable
- block/replication: Avoid cancelling the job twice
- ahci: Log lost IRQs
- iotests: Run pylint and mypy in a testcase
- iotests: log messages from notrun()

# gpg: Signature made Mon 18 May 2020 18:05:32 BST
# gpg:                using RSA key DC3DEB159A9AF95D3D7456FE7F09B272C88F2FD6
# gpg:                issuer "kwolf@redhat.com"
# gpg: Good signature from "Kevin Wolf <kwolf@redhat.com>" [full]
# Primary key fingerprint: DC3D EB15 9A9A F95D 3D74  56FE 7F09 B272 C88F 2FD6

* remotes/kevin/tags/for-upstream: (52 commits)
  hw: Use QEMU_IS_ALIGNED() on parallel flash block size
  iotests/030: Reduce run time by unthrottling job earlier
  hw/ide/ahci: Log lost IRQs
  iotests: log messages from notrun()
  block/block-copy: Simplify block_copy_do_copy()
  block/block-copy: Fix uninitialized variable in block_copy_task_entry
  block: Drop @child_class from bdrv_child_perm()
  block: Pass BdrvChildRole in remaining cases
  block: Drop child_file
  block: Drop bdrv_format_default_perms()
  block: Make bdrv_filter_default_perms() static
  block: Use bdrv_default_perms()
  tests: Use child_of_bds instead of child_file
  block: Use child_of_bds in remaining places
  block: Make filter drivers use child_of_bds
  block: Make format drivers use child_of_bds
  block: Drop child_backing
  block: Make backing files child_of_bds children
  block: Drop child_format
  block: Switch child_format users to child_of_bds
  ...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2020-05-19 11:58:56 +01:00
Peter Maydell
a89af8c20a nbd patches for 2020-05-20
- fix stranded fd in 'qemu-nbd -c /dev/nbd0'
 - add 'qemu-img map --start-offset --max-length' options
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Merge remote-tracking branch 'remotes/ericb/tags/pull-nbd-2020-05-18' into staging

nbd patches for 2020-05-20

- fix stranded fd in 'qemu-nbd -c /dev/nbd0'
- add 'qemu-img map --start-offset --max-length' options

# gpg: Signature made Mon 18 May 2020 17:29:56 BST
# gpg:                using RSA key 71C2CC22B1C4602927D2F3AAA7A16B4A2527436A
# gpg: Good signature from "Eric Blake <eblake@redhat.com>" [full]
# gpg:                 aka "Eric Blake (Free Software Programmer) <ebb9@byu.net>" [full]
# gpg:                 aka "[jpeg image of size 6874]" [full]
# Primary key fingerprint: 71C2 CC22 B1C4 6029 27D2  F3AA A7A1 6B4A 2527 436A

* remotes/ericb/tags/pull-nbd-2020-05-18:
  iotests: Enhance 223 to cover qemu-img map improvements
  qemu-img: Add --start-offset and --max-length to map
  qemu-img: refactor dump_map_entry JSON format output
  qemu-img: validate image length in img_map
  qemu_img: add cvtnum_full to print error reports
  qemu-nbd: Close inherited stderr

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2020-05-18 20:04:54 +01:00
Philippe Mathieu-Daudé
4cdd0a774d hw: Use QEMU_IS_ALIGNED() on parallel flash block size
Use the QEMU_IS_ALIGNED() macro to verify the flash block size
is properly aligned. It is quicker to process when reviewing.

Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20200511205246.24621-1-philmd@redhat.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2020-05-18 19:05:25 +02:00
Kevin Wolf
b1b30ff4df iotests/030: Reduce run time by unthrottling job earlier
test_overlapping_3() throttles its active commit job so it can be sure
the job is still busy when it checks that you can't start a conflicting
streaming job.

However, it only sets the commit job back to full speed when it is
ready, which takes a few seconds while it's throttled. We can already
reset the limit after having checked that block-stream returns an error
and save these seconds.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <20200513100025.33543-1-kwolf@redhat.com>
Reviewed-by: Alberto Garcia <berto@igalia.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2020-05-18 19:05:25 +02:00
Philippe Mathieu-Daudé
c5f12a80c6 hw/ide/ahci: Log lost IRQs
One might find interesting to look at AHCI IRQs.

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20200504094858.5975-1-f4bug@amsat.org>
Reviewed-by: John Snow <jsnow@redhat.com>
Acked-by: John Snow <jsnow@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2020-05-18 19:05:25 +02:00
John Snow
44a46a9cd9 iotests: log messages from notrun()
Shift the logging initialization up to occur prior to validation checks,
so that notrun() messages still get printed to console.

(Also, remove the "debugging messages active" message, because we don't
need to see that hundreds of times per iotest suite run.)

Signed-off-by: John Snow <jsnow@redhat.com>
Message-Id: <20200514201614.19941-2-jsnow@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2020-05-18 19:05:25 +02:00
Philippe Mathieu-Daudé
d7eca54222 block/block-copy: Simplify block_copy_do_copy()
block_copy_do_copy() is static, only used in block_copy_task_entry
with the error_is_read argument set. No need to check for it,
simplify.

Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20200507121129.29760-3-philmd@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2020-05-18 19:05:25 +02:00
Philippe Mathieu-Daudé
c78dd00e35 block/block-copy: Fix uninitialized variable in block_copy_task_entry
Fix when building with -Os:

    CC      block/block-copy.o
  block/block-copy.c: In function ‘block_copy_task_entry’:
  block/block-copy.c:428:38: error: ‘error_is_read’ may be used uninitialized in this function [-Werror=maybe-uninitialized]
    428 |         t->call_state->error_is_read = error_is_read;
        |         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~

Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20200507121129.29760-2-philmd@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2020-05-18 19:05:25 +02:00
Max Reitz
e5d8a40685 block: Drop @child_class from bdrv_child_perm()
Implementations should decide the necessary permissions based on @role.

Signed-off-by: Max Reitz <mreitz@redhat.com>
Message-Id: <20200513110544.176672-35-mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2020-05-18 19:05:25 +02:00
Max Reitz
1f38f04eac block: Pass BdrvChildRole in remaining cases
These calls have no real use for the child role yet, but it will not
harm to give one.

Notably, the bdrv_root_attach_child() call in blockjob.c is left
unmodified because there is not much the generic BlockJob object wants
from its children.

Signed-off-by: Max Reitz <mreitz@redhat.com>
Message-Id: <20200513110544.176672-34-mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2020-05-18 19:05:25 +02:00
Max Reitz
f6de853fa3 block: Drop child_file
Signed-off-by: Max Reitz <mreitz@redhat.com>
Message-Id: <20200513110544.176672-33-mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2020-05-18 19:05:25 +02:00
Max Reitz
9aab945e9c block: Drop bdrv_format_default_perms()
Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <20200513110544.176672-32-mreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2020-05-18 19:05:25 +02:00
Max Reitz
87278af1d9 block: Make bdrv_filter_default_perms() static
Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <20200513110544.176672-31-mreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2020-05-18 19:05:25 +02:00
Max Reitz
69dca43d6b block: Use bdrv_default_perms()
bdrv_default_perms() can decide which permission profile to use based on
the BdrvChildRole, so block drivers do not need to select it explicitly.

The blkverify driver now no longer shares the WRITE permission for the
image to verify.  We thus have to adjust two places in
test-block-iothread not to take it.  (Note that in theory, blkverify
should behave like quorum in this regard and share neither WRITE nor
RESIZE for both of its children.  In practice, it does not really
matter, because blkverify is used only for debugging, so we might as
well keep its permissions rather liberal.)

Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <20200513110544.176672-30-mreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2020-05-18 19:05:25 +02:00
Max Reitz
a16be3cdfc tests: Use child_of_bds instead of child_file
Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <20200513110544.176672-29-mreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2020-05-18 19:05:25 +02:00
Max Reitz
58944401d6 block: Use child_of_bds in remaining places
Replace child_file by child_of_bds in all remaining places (excluding
tests).

Signed-off-by: Max Reitz <mreitz@redhat.com>
Message-Id: <20200513110544.176672-28-mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2020-05-18 19:05:25 +02:00
Max Reitz
b3af2af43b block: Make filter drivers use child_of_bds
Note that some filters have secondary children, namely blkverify (the
image to be verified) and blklogwrites (the log).  This patch does not
touch those children.

Note that for blkverify, the filtered child should not be format-probed.
While there is nothing enforcing this here, in practice, it will not be:
blkverify implements .bdrv_file_open.  The block layer ensures (and in
fact, asserts) that BDRV_O_PROTOCOL is set for every BDS whose driver
implements .bdrv_file_open.  This flag will then be bequeathed to
blkverify's children, and they will thus (by default) not be probed
either.

("By default" refers to the fact that blkverify's other child (the
non-filtered one) will have BDRV_O_PROTOCOL force-unset, because that is
what happens for all non-filtered children of non-format drivers.)

Signed-off-by: Max Reitz <mreitz@redhat.com>
Message-Id: <20200513110544.176672-27-mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2020-05-18 19:05:25 +02:00
Max Reitz
8b1869daad block: Make format drivers use child_of_bds
Commonly, they need to pass the BDRV_CHILD_IMAGE set as the
BdrvChildRole; but there are exceptions for drivers with external data
files (qcow2 and vmdk).

Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <20200513110544.176672-26-mreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2020-05-18 19:05:25 +02:00
Max Reitz
ff3541c4e2 block: Drop child_backing
Signed-off-by: Max Reitz <mreitz@redhat.com>
Message-Id: <20200513110544.176672-25-mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2020-05-18 19:05:25 +02:00
Max Reitz
25191e5ff0 block: Make backing files child_of_bds children
Make all parents of backing files pass the appropriate BdrvChildRole.
By doing so, we can switch their BdrvChildClass over to the generic
child_of_bds, which will do the right thing when given a correct
BdrvChildRole.

Signed-off-by: Max Reitz <mreitz@redhat.com>
Message-Id: <20200513110544.176672-24-mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2020-05-18 19:05:25 +02:00
Max Reitz
f34ade1148 block: Drop child_format
Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <20200513110544.176672-23-mreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2020-05-18 19:05:25 +02:00
Max Reitz
36ee58d13b block: Switch child_format users to child_of_bds
Both users (quorum and blkverify) use child_format for
not-really-filtered children, so the appropriate BdrvChildRole in both
cases is DATA.  (Note that this will cause bdrv_inherited_options() to
force-allow format probing.)

Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <20200513110544.176672-22-mreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2020-05-18 19:05:25 +02:00
Max Reitz
500e243420 raw-format: Split raw_read_options()
Split raw_read_options() into one function that actually just reads the
options, and another that applies them.  This will allow us to detect
whether the user has specified any options before attaching the file
child (so we can decide on its role based on the options).

Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <20200513110544.176672-21-mreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2020-05-18 19:05:25 +02:00
Max Reitz
2519f54919 block: Add bdrv_default_perms()
This callback can be used by BDSs that use child_of_bds with the
appropriate BdrvChildRole for their children.

Also, make bdrv_format_default_perms() use it for child_of_bds children
(just a temporary solution until we can drop bdrv_format_default_perms()
altogether).

Signed-off-by: Max Reitz <mreitz@redhat.com>
Message-Id: <20200513110544.176672-20-mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2020-05-18 19:05:25 +02:00
Max Reitz
f889054f03 block: Relax *perms_for_storage for data children
We can be less restrictive about pure data children than those with
metadata on them, so let bdrv_default_perms_for_storage() handle
metadata children differently from pure data children.

As explained in the code, the restrictions on metadata children are
strictly stricter than those for pure data children, so in theory we
just have to distinguish between pure-data and all other storage
children (pure metadata or data+metadata).  In practice, that is not
obvious, though, so we have two independent code paths for metadata and
for data children, and data+metadata children will go through both
(without the path for data children doing anything meaningful).

Signed-off-by: Max Reitz <mreitz@redhat.com>
Message-Id: <20200513110544.176672-19-mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2020-05-18 19:05:25 +02:00
Max Reitz
6f838a4b73 block: Pull out bdrv_default_perms_for_storage()
Right now, bdrv_format_default_perms() is used by format parents
(generally). We want to switch to a model where most parents use a
single BdrvChildClass, which then decides the permissions based on the
child role. To do so, we have to split bdrv_format_default_perms() into
separate functions for each such role.

Note that bdrv_default_perms_for_storage() currently handles all DATA |
METADATA children.  A follow-up patch is going to split it further into
one function for each case.

Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <20200513110544.176672-18-mreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2020-05-18 19:05:25 +02:00
Max Reitz
70082db4ef block: Pull out bdrv_default_perms_for_cow()
Right now, bdrv_format_default_perms() is used by format parents
(generally). We want to switch to a model where most parents use a
single BdrvChildClass, which then decides the permissions based on the
child role. To do so, we have to split bdrv_format_default_perms() into
separate functions for each such role.

Signed-off-by: Max Reitz <mreitz@redhat.com>
Message-Id: <20200513110544.176672-17-mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2020-05-18 19:05:25 +02:00
Max Reitz
33f2663bd5 block: Distinguish paths in *_format_default_perms
bdrv_format_default_perms() has one code path for backing files, and one
for storage files.  We want to pull them out into their own functions,
so make sure they are completely distinct before so the next patches
will be a bit cleaner.

Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <20200513110544.176672-16-mreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2020-05-18 19:05:25 +02:00
Max Reitz
4348355032 block: Add child_of_bds
Any current user of child_file, child_format, and child_backing can and
should use this generic BdrvChildClass instead, as it can handle all of
these cases.  However, to be able to do so, the users must pass the
appropriate BdrvChildRole when the child is created/attached.  (The
following commits will take care of that.)

Signed-off-by: Max Reitz <mreitz@redhat.com>
Message-Id: <20200513110544.176672-15-mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2020-05-18 19:05:25 +02:00
Max Reitz
48e0828861 block: Unify bdrv_child_cb_detach()
Make bdrv_child_cb_detach() call bdrv_backing_detach() for children with
a COW role (and drop the reverse call from bdrv_backing_detach()), so it
can be used for any child (with a proper role set).

Because so far no child has a proper role set, we need a temporary new
callback for child_backing.detach that ensures bdrv_backing_detach() is
called for all COW children that do not have their role set yet.

(Also, move bdrv_child_cb_detach() down to group it with
bdrv_inherited_options() and bdrv_child_cb_attach().)

Signed-off-by: Max Reitz <mreitz@redhat.com>
Message-Id: <20200513110544.176672-14-mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2020-05-18 19:05:25 +02:00
Max Reitz
ca2f1234c3 block: Unify bdrv_child_cb_attach()
Make bdrv_child_cb_attach() call bdrv_backing_attach() for children with
a COW role (and drop the reverse call from bdrv_backing_attach()), so it
can be used for any child (with a proper role set).

Because so far no child has a proper role set, we need a temporary new
callback for child_backing.attach that ensures bdrv_backing_attach() is
called for all COW children that do not have their role set yet.

(Also, move bdrv_child_cb_attach() down to group it with
bdrv_inherited_options().)

Signed-off-by: Max Reitz <mreitz@redhat.com>
Message-Id: <20200513110544.176672-13-mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2020-05-18 19:05:25 +02:00
Max Reitz
00ff7ffd67 block: Use bdrv_inherited_options()
Let child_file's, child_format's, and child_backing's .inherit_options()
implementations fall back to bdrv_inherited_options() to show that it
would really work for all of these cases, if only the parents passed the
appropriate BdrvChildRole and parent_is_format values.

(Also, make bdrv_open_inherit(), the only place to explicitly call
bdrv_backing_options(), call bdrv_inherited_options() instead.)

This patch should incur only two visible changes, both for child_format
children, both of which are effectively bug fixes:

First, they no longer have discard=unmap set by default.  This reason it
was set is because bdrv_inherited_fmt_options() fell through to
bdrv_protocol_options(), and that set it because "format drivers take
care to send flushes and respect unmap policy".  None of the drivers
that use child_format for their children (quorum and blkverify) are
format drivers, though, so this reasoning does not apply here.

Second, they no longer have BDRV_O_NO_IO force-cleared.  child_format
was used solely for children that do not store any metadata and as such
will not be accessed by their parents as long as those parents do not
receive I/O themselves.  Thus, such children should inherit
BDRV_O_NO_IO.

Signed-off-by: Max Reitz <mreitz@redhat.com>
Message-Id: <20200513110544.176672-12-mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2020-05-18 19:05:25 +02:00
Max Reitz
fae8bd3904 block: Add generic bdrv_inherited_options()
After the series this patch belongs to, we want to have a common
BdrvChildClass that encompasses all of child_file, child_format, and
child_backing.  Such a single class needs a single .inherit_options()
implementation, and this patch introduces it.

The next patch will show how the existing implementations can fall back
to it just by passing appropriate BdrvChildRole and parent_is_format
values.

Signed-off-by: Max Reitz <mreitz@redhat.com>
Message-Id: <20200513110544.176672-11-mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2020-05-18 19:05:25 +02:00
Max Reitz
b054ff7354 block: Rename bdrv_inherited_options()
The other two .inherit_options implementations specify exactly for what
case they are used in their name, so do it for this one as well.

(The actual intention behind this patch is to follow it up with a
generic bdrv_inherited_options() that works for all three cases.)

Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <20200513110544.176672-10-mreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2020-05-18 19:05:25 +02:00
Max Reitz
3cdc69d31b block: Pass parent_is_format to .inherit_options()
We plan to unify the generic .inherit_options() functions.  The
resulting common function will need to decide whether to force-enable
format probing, force-disable it, or leave it as-is.  To make this
decision, it will need to know whether the parent node is a format node
or not (because we never want format probing if the parent is a format
node already (except for the backing chain)).

Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <20200513110544.176672-9-mreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2020-05-18 19:05:25 +02:00
Max Reitz
272c02eaef block: Pass BdrvChildRole to .inherit_options()
For now, all callers (effectively) pass 0 and no callee evaluates thie
value.  Later patches will change both.

Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <20200513110544.176672-8-mreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2020-05-18 19:05:25 +02:00
Max Reitz
bf8e925eb5 block: Pass BdrvChildRole to bdrv_child_perm()
For now, all callers pass 0 and no callee evaluates this value.  Later
patches will change both.

Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <20200513110544.176672-7-mreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2020-05-18 19:05:25 +02:00
Max Reitz
258b776515 block: Add BdrvChildRole to BdrvChild
For now, it is always set to 0.  Later patches in this series will
ensure that all callers pass an appropriate combination of flags.

Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <20200513110544.176672-6-mreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2020-05-18 19:05:25 +02:00
Max Reitz
3284bcf430 block: Add BdrvChildRole and BdrvChildRoleBits
This mask will supplement BdrvChildClass when it comes to what role (or
combination of roles) a child takes for its parent.  It consists of
BdrvChildRoleBits values (which is an enum).

Because empty enums are not allowed, let us just start with it filled.

Signed-off-by: Max Reitz <mreitz@redhat.com>
Message-Id: <20200513110544.176672-5-mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2020-05-18 19:05:25 +02:00
Max Reitz
bd86fb990c block: Rename BdrvChildRole to BdrvChildClass
This structure nearly only contains parent callbacks for child state
changes.  It cannot really reflect a child's role, because different
roles may overlap (as we will see when real roles are introduced), and
because parents can have custom callbacks even when the child fulfills a
standard role.

Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Alberto Garcia <berto@igalia.com>
Message-Id: <20200513110544.176672-4-mreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2020-05-18 19:05:25 +02:00
Max Reitz
d67066d8bc block: Add BlockDriver.is_format
We want to unify child_format and child_file at some point.  One of the
important things that set format drivers apart from other drivers is
that they do not expect other format nodes under them (except in the
backing chain), i.e. we must not probe formats inside of formats.  That
means we need something on which to distinguish format drivers from
others, and hence this flag.

Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Alberto Garcia <berto@igalia.com>
Message-Id: <20200513110544.176672-3-mreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2020-05-18 19:05:25 +02:00
Max Reitz
6540fd153c block: Mark commit, mirror, blkreplay as filters
The commit, mirror, and blkreplay block nodes are filters, so they should
be marked as such.

Signed-off-by: Max Reitz <mreitz@redhat.com>
Message-Id: <20200513110544.176672-2-mreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2020-05-18 19:05:25 +02:00
Max Reitz
f844ec01b3 block: Use bdrv_make_empty() where possible
Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <20200429141126.85159-3-mreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2020-05-18 19:05:25 +02:00
Kevin Wolf
6ecbc6c526 replication: Avoid blk_make_empty() on read-only child
This is just a bandaid to keep tests/test-replication working after
bdrv_make_empty() starts to assert that we're not trying to call it on a
read-only child.

For the real solution in the future, replication should not steal the
BdrvChild from its backing file (this is never correct to do!), but
instead have its own child node references, with the appropriate
permissions.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2020-05-18 19:05:25 +02:00
Max Reitz
2d97fde439 block: Use blk_make_empty() after commits
bdrv_commit() already has a BlockBackend pointing to the BDS that we
want to empty, it just has the wrong permissions.

qemu-img commit has no BlockBackend pointing to the old backing file
yet, but introducing one is simple.

After this commit, bdrv_make_empty() is the only remaining caller of
BlockDriver.bdrv_make_empty().

Signed-off-by: Max Reitz <mreitz@redhat.com>
Message-Id: <20200429141126.85159-5-mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
[kwolf: Fixed up reference output for 098]
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2020-05-18 19:05:25 +02:00
Max Reitz
2b7bbdbdef block: Add blk_make_empty()
Two callers of BlockDriver.bdrv_make_empty() remain that should not call
this method directly.  Both do not have access to a BdrvChild, but they
can use a BlockBackend, so we add this function that lets them use it.

Signed-off-by: Max Reitz <mreitz@redhat.com>
Message-Id: <20200429141126.85159-4-mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2020-05-18 19:05:25 +02:00
Max Reitz
6f7a3b535f block: Add bdrv_make_empty()
Right now, all users of bdrv_make_empty() call the BlockDriver method
directly.  That is not only bad style, it is also wrong, unless the
caller has a BdrvChild with a WRITE or WRITE_UNCHANGED permission.
(WRITE_UNCHANGED suffices, because callers generally use this function
to clear a node with a backing file after a commit operation.)

Introduce bdrv_make_empty() that verifies that it does.

Signed-off-by: Max Reitz <mreitz@redhat.com>
Message-Id: <20200429141126.85159-2-mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2020-05-18 19:05:25 +02:00
Kevin Wolf
19b7868eff iotests: Run pylint and mypy in a testcase
We made sure that iotests.py passes pylint. It would be a shame if we
allowed new patches in that break this again, so let's just add a
meta-test case that runs pylint on it.

While we don't pass mypy --strict yet, we can already run it with a few
options that would be part of --strict to make sure that we won't
regress on these aspects at least until we can enable the full thing.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <20200511163529.349329-3-kwolf@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: John Snow <jsnow@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2020-05-18 19:05:25 +02:00
Kevin Wolf
cd8f5b7592 iotests: Fix incomplete type declarations
We need to fix only a few places so that iotests.py can pass
mypy --disallow-incomplete-defs, which seems to be a desirable option to
have enabled in the long run.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <20200511163529.349329-2-kwolf@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: John Snow <jsnow@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2020-05-18 19:05:25 +02:00
Lukas Straub
e140f4b7b8 block/replication.c: Avoid cancelling the job twice
If qemu in colo secondary mode is stopped, it crashes because
s->backup_job is canceled twice: First with job_cancel_sync_all()
in qemu_cleanup() and then in replication_stop().

Fix this by assigning NULL to s->backup_job when the job completes
so replication_stop() and replication_do_checkpoint() won't touch
the job.

Signed-off-by: Lukas Straub <lukasstraub2@web.de>
Message-Id: <20200511090801.7ed5d8f3@luklap>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2020-05-18 19:05:25 +02:00