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2014-10-23sysbus: Use TYPE_DEVICE GPIO functionalityPeter Crosthwaite
Re-implement the Sysbus GPIOs to use the existing TYPE_DEVICE GPIO named framework. A constant string name is chosen to avoid conflicts with existing unnamed GPIOs. This unifies GPIOs are IRQs for sysbus devices and allows removal of all Sysbus state for GPIOs. Any existing and future-added functionality for GPIOs is now also available for sysbus IRQs. Reviewed-by: Alexander Graf <agraf@suse.de> Signed-off-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-10-23qdev: gpio: Define qdev_pass_gpios()Peter Crosthwaite
Allows a container to take ownership of GPIOs in a contained device and automatically connect them as GPIOs to the container. This prepares for deprecation of the SYSBUS IRQ functionality, which has this feature. We push it up to the device level instead of sysbus level. There's nothing sysbus specific about passing GPIOs to containers so its a legitimate device-level generic feature. Reviewed-by: Alexander Graf <agraf@suse.de> Signed-off-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-10-23qdev: gpio: Remove qdev_init_gpio_out x1 restrictionPeter Crosthwaite
Previously this was restricted to a single call per-dev/per-name. With the conversion of the GPIO output state to QOM the implementation can now handle repeated calls. Remove the restriction. Reviewed-by: Alexander Graf <agraf@suse.de> Signed-off-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-10-23qdev: gpio: delete NamedGPIOList::outPeter Crosthwaite
All users of GPIO outputs are fully QOMified, using QOM properties to access the GPIO data. Delete. Reviewed-by: Alexander Graf <agraf@suse.de> Signed-off-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-10-23irq: Remove qemu_irq_intercept_outPeter Crosthwaite
No more users left and obsoleted by qdev_intercept_gpio_out. Reviewed-by: Alexander Graf <agraf@suse.de> Signed-off-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-10-23qtest/irq: Rework IRQ interceptionPeter Crosthwaite
Change the qtest intercept handler to accept just the individual IRQ being intercepted as opaque. n is still expected to be correctly set as for the original intercepted irq. qemu_intercept_irq_in is updated accordingly. Then covert the qemu_irq_intercept_out call to use qdev intercept version. This stops qtest from having to mess with the raw IRQ pointers (still has to mess with names and counts but a step in the right direction). Reviewed-by: Alexander Graf <agraf@suse.de> Signed-off-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-10-23qdev: gpio: Add API for intercepting a GPIOPeter Crosthwaite
To replace the old qemu_irq intercept API (which had users reaching into qdev private state for GPIOs). Reviewed-by: Alexander Graf <agraf@suse.de> Signed-off-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-10-23qdev: gpio: Re-implement qdev_connect_gpio QOM stylePeter Crosthwaite
Re-implement as a link setter. This should allow the QOM framework to keep track of ref counts properly etc. We need to add a default parent for the connecting input incase it's coming from a non-qdev source. We simply parent the IRQ to the machine in this case. Reviewed-by: Alexander Graf <agraf@suse.de> Signed-off-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-10-23qom: Demote already-has-a-parent to a regular errorPeter Crosthwaite
Rather than an abort(). This allows callers to decide whether parenting an already-parented object is a fatal error condition. Useful for providing a default value for an object's parent in the case where you want to set one iff it doesn't already have one. Reviewed-by: Alexander Graf <agraf@suse.de> Signed-off-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-10-23qom: Allow clearing of a Link propertyPeter Crosthwaite
By passing in "" to object_property_set_link. The lead user of this is the QDEV GPIO framework which will implement GPIO disconnects via an "unlink". GPIO disconnection is used by qtest's irq_intercept_out command. Reviewed-by: Alexander Graf <agraf@suse.de> Signed-off-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-10-23virtio-scsi: dataplane: stop trying on notifier errorCornelia Huck
There's no use to constantly trying to enable dataplane if we failed to set up guest or host notifiers, so fence it off in that case. We'll try again if the device is reinitialized. Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-10-23virtio-scsi: dataplane: fail setup gracefullyCornelia Huck
The dataplane code is currently doing a hard exit on various setup failures. In practice, this may mean that a guest suddenly dies after a dataplane device failed to come up (e.g., when a file descriptor limit is hit for the nth device). Let's just try to unwind the setup instead and return. Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-10-23virtio-scsi: dataplane: print why starting failedCornelia Huck
Setting up guest or host notifiers may fail, but the user will have no idea why: Let's print the error returned by the callback. Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-10-23virtio-scsi-dataplane: Add op blockerFam Zheng
We need this to protect dataplane thread from race conditions with block jobs until the latter is made dataplane-safe. Signed-off-by: Fam Zheng <famz@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-10-22Merge remote-tracking branch 'remotes/mdroth/tags/qga-pull-2014-10-22-tag' ↵Peter Maydell
into staging qga: remove readdir_r usage and fix use-after-free Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com> # gpg: Signature made Wed 22 Oct 2014 13:56:19 BST using RSA key ID F108B584 # gpg: Can't check signature: public key not found * remotes/mdroth/tags/qga-pull-2014-10-22-tag: qga: Rewrite code where using readdir_r Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-10-22Merge remote-tracking branch ↵Peter Maydell
'remotes/bkoppelmann/tags/pull-tricore-20141021' into staging TriCore ABS, ABSB, B, BIT, BO instructions added # gpg: Signature made Tue 21 Oct 2014 17:47:32 BST using RSA key ID 6B69CA14 # gpg: Good signature from "Bastian Koppelmann <kbastian@mail.uni-paderborn.de>" * remotes/bkoppelmann/tags/pull-tricore-20141021: target-tricore: Add instructions of BO opcode format target-tricore: Add instructions of BIT opcode format target-tricore: Add instructions of B opcode format target-tricore: Add instructions of ABS, ABSB opcode format target-tricore: Cleanup and Bugfixes Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-10-22Merge remote-tracking branch 'remotes/cohuck/tags/s390x-20141021' into stagingPeter Maydell
add missing s390x files to MAINTAINERS # gpg: Signature made Tue 21 Oct 2014 11:57:12 BST using RSA key ID C6F02FAF # gpg: Good signature from "Cornelia Huck <huckc@linux.vnet.ibm.com>" # gpg: aka "Cornelia Huck <cornelia.huck@de.ibm.com>" * remotes/cohuck/tags/s390x-20141021: s390x: sweep up unmaintained files Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-10-22Merge remote-tracking branch 'remotes/kevin/tags/for-upstream' into stagingPeter Maydell
Block patches # gpg: Signature made Mon 20 Oct 2014 13:04:09 BST using RSA key ID C88F2FD6 # gpg: Good signature from "Kevin Wolf <kwolf@redhat.com>" * remotes/kevin/tags/for-upstream: (28 commits) block: Make device model's references to BlockBackend strong block: Lift device model API into BlockBackend blockdev: Convert qmp_eject(), qmp_change_blockdev() to BlockBackend block/qapi: Convert qmp_query_block() to BlockBackend blockdev: Fix blockdev-add not to create DriveInfo blockdev: Drop superfluous DriveInfo member id pc87312: Drop unused members of PC87312State ide: Complete conversion from BlockDriverState to BlockBackend hw: Convert from BlockDriverState to BlockBackend, mostly virtio-blk: Rename VirtIOBlkConf variables to conf virtio-blk: Drop redundant VirtIOBlock member conf block: Rename BlockDriverCompletionFunc to BlockCompletionFunc block: Rename BlockDriverAIOCB* to BlockAIOCB* block: Eliminate DriveInfo member bdrv, use blk_by_legacy_dinfo() block: Merge BlockBackend and BlockDriverState name spaces block: Eliminate BlockDriverState member device_name[] block: Eliminate bdrv_iterate(), use bdrv_next() blockdev: Eliminate drive_del() block: Make BlockBackend own its BlockDriverState block: Code motion to get rid of stubs/blockdev.c ... Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-10-22Merge remote-tracking branch 'remotes/kraxel/tags/pull-usb-20141015-2' into ↵Peter Maydell
staging usb: add high speed mouse & keyboard configuration * remotes/kraxel/tags/pull-usb-20141015-2: xhci: remove dead code usb-hid: Add high speed keyboard configuration usb-hid: Add high speed mouse configuration usb-hid: Move descriptor decision to usb-hid initfn Conflicts: include/hw/i386/pc.h [Fixed trivial merge conflict in the pc-2.1 property list] Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-10-22Merge remote-tracking branch 'remotes/spice/tags/pull-spice-20141015-1' into ↵Peter Maydell
staging qxl: keep going if reaching guest bug on empty area # gpg: Signature made Wed 15 Oct 2014 11:45:37 BST using RSA key ID D3E87138 # gpg: Good signature from "Gerd Hoffmann (work) <kraxel@redhat.com>" # gpg: aka "Gerd Hoffmann <gerd@kraxel.org>" # gpg: aka "Gerd Hoffmann (private) <kraxel@gmail.com>" * remotes/spice/tags/pull-spice-20141015-1: qxl: keep going if reaching guest bug on empty area Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-10-22Merge remote-tracking branch 'remotes/kraxel/tags/pull-gtk-20141015-1' into ↵Peter Maydell
staging gtk: fix memory leak, add pause key support. # gpg: Signature made Wed 15 Oct 2014 11:30:39 BST using RSA key ID D3E87138 # gpg: Good signature from "Gerd Hoffmann (work) <kraxel@redhat.com>" # gpg: aka "Gerd Hoffmann <gerd@kraxel.org>" # gpg: aka "Gerd Hoffmann (private) <kraxel@gmail.com>" * remotes/kraxel/tags/pull-gtk-20141015-1: gtk: add support for the Pause key gtk.c: Fix memory leak in gd_set_keycode_type() Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-10-22qga: Rewrite code where using readdir_rzhanghailiang
If readdir_r fails, error_setg_errno will reference the freed pointer *dirpath*. Moreover, readdir_r may cause a buffer overflow, using readdir instead. Signed-off-by: zhanghailiang <zhang.zhanghailiang@huawei.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Cc: qemu-stable@nongnu.org Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
2014-10-22Merge remote-tracking branch 'remotes/kraxel/tags/pull-console-20141015-1' ↵Peter Maydell
into staging configure: Prepend pixman and ftd flags to overrule system-provided ones # gpg: Signature made Wed 15 Oct 2014 11:21:13 BST using RSA key ID D3E87138 # gpg: Good signature from "Gerd Hoffmann (work) <kraxel@redhat.com>" # gpg: aka "Gerd Hoffmann <gerd@kraxel.org>" # gpg: aka "Gerd Hoffmann (private) <kraxel@gmail.com>" * remotes/kraxel/tags/pull-console-20141015-1: configure: Prepend pixman and ftd flags to overrule system-provided ones Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-10-22Merge remote-tracking branch 'remotes/lalrae/tags/mips-20141015' into stagingPeter Maydell
* remotes/lalrae/tags/mips-20141015: (28 commits) target-mips: Remove unused gen_load_ACX, gen_store_ACX and cpu_ACX target-mips/dsp_helper.c: Add ifdef guards around various functions target-mips/translate.c: Add ifdef guard around check_mips64() target-mips/op_helper.c: Remove unused do_lbu() function target-mips/dsp_helper.c: Remove unused function get_DSPControl_24() target-mips: fix broken MIPS16 and microMIPS target-mips/translate.c: Update OPC_SYNCI target-mips: define a new generic CPU supporting MIPS64 Release 6 ISA mips_malta: update malta's pseudo-bootloader - replace JR with JALR target-mips: remove JR, BLTZAL, BGEZAL and add NAL, BAL instructions target-mips: do not allow Status.FR=0 mode in 64-bit FPU target-mips: add new Floating Point Comparison instructions target-mips: add new Floating Point instructions softfloat: add functions corresponding to IEEE-2008 min/maxNumMag target-mips: add AUI, LSA and PCREL instruction families target-mips: add compact and CP1 branches target-mips: add ALIGN, DALIGN, BITSWAP and DBITSWAP instructions target-mips: Status.UX/SX/KX enable 32-bit address wrapping target-mips: move CLO, DCLO, CLZ, DCLZ, SDBBP and free special2 in R6 target-mips: redefine Integer Multiply and Divide instructions ... Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-10-22hw/i386/pc_q35.c: Avoid g_assert_cmpint() as it is not in glib 2.12Peter Maydell
The function g_assert_cmpint() is not in glib 2.12, which is our current minimum requirement. Rephrase the recently added assertion to avoid it. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Gonglei <arei.gonglei@huawei.com>
2014-10-21s390x: sweep up unmaintained filesCornelia Huck
Several s390x/kvm/ccw related files don't have an entry in MAINTAINERS: Sort them into the appropriate sections. Acked-by: Christian Borntraeger <borntraeger@de.ibm.com> Reviewed-by: Alexander Graf <agraf@suse.de> Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2014-10-20block: Make device model's references to BlockBackend strongMarkus Armbruster
Doesn't make a difference just yet, but it's the right thing to do. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Benoît Canet <benoit.canet@nodalink.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2014-10-20block: Lift device model API into BlockBackendMarkus Armbruster
Move device model attachment / detachment and the BlockDevOps device model callbacks and their wrappers from BlockDriverState to BlockBackend. Wrapper calls in block.c change from bdrv_dev_FOO_cb(bs, ...) to if (bs->blk) { bdrv_dev_FOO_cb(bs->blk, ...); } No change, because both bdrv_dev_change_media_cb() and bdrv_dev_resize_cb() do nothing when no device model is attached, and a device model can be attached only when bs->blk. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2014-10-20blockdev: Convert qmp_eject(), qmp_change_blockdev() to BlockBackendMarkus Armbruster
Much more command code needs conversion. I'm converting these now because they're using bdrv_dev_* functions, which I'm about to lift into BlockBackend. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Benoît Canet <benoit.canet@nodalink.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2014-10-20block/qapi: Convert qmp_query_block() to BlockBackendMarkus Armbruster
Much more command code needs conversion. I start with this one because it's using bdrv_dev_* functions, which I'm about to lift into BlockBackend. While there, give bdrv_query_info() internal linkage. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Benoît Canet <benoit.canet@nodalink.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2014-10-20blockdev: Fix blockdev-add not to create DriveInfoMarkus Armbruster
blockdev_init() always creates a DriveInfo, but only drive_new() fills it in. qmp_blockdev_add() leaves it blank. This results in a drive with type = IF_IDE, bus = 0, unit = 0. Screwed up in commit ee13ed1c. Board initialization code looking for IDE drive (0,0) can pick up one of these bogus drives. The QMP command has to execute really early to be visible. Not sure how likely that is in practice. Fix by creating DriveInfo in drive_new(). Block backends created by blockdev-add don't get one. Breaks the test for "has been created by qmp_blockdev_add()" in blockdev_mark_auto_del() and do_drive_del(), because it changes the value of dinfo && !dinfo->enable_auto_del from true to false. Simply test !dinfo instead. Leaves DriveInfo member enable_auto_del unused. Drop it. A few places assume a block backend always has a DriveInfo. Fix them up. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2014-10-20blockdev: Drop superfluous DriveInfo member idMarkus Armbruster
Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Benoît Canet <benoit.canet@nodalink.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2014-10-20pc87312: Drop unused members of PC87312StateMarkus Armbruster
Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Benoît Canet <benoit.canet@nodalink.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2014-10-20ide: Complete conversion from BlockDriverState to BlockBackendMarkus Armbruster
Add a BlockBackend member to TrimAIOCB, so ide_issue_trim_cb() can use blk_aio_discard() instead of bdrv_aio_discard(). Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2014-10-20hw: Convert from BlockDriverState to BlockBackend, mostlyMarkus Armbruster
Device models should access their block backends only through the block-backend.h API. Convert them, and drop direct includes of inappropriate headers. Just four uses of BlockDriverState are left: * The Xen paravirtual block device backend (xen_disk.c) opens images itself when set up via xenbus, bypassing blockdev.c. I figure it should go through qmp_blockdev_add() instead. * Device model "usb-storage" prompts for keys. No other device model does, and this one probably shouldn't do it, either. * ide_issue_trim_cb() uses bdrv_aio_discard() instead of blk_aio_discard() because it fishes its backend out of a BlockAIOCB, which has only the BlockDriverState. * PC87312State has an unused BlockDriverState[] member. The next two commits take care of the latter two. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2014-10-20virtio-blk: Rename VirtIOBlkConf variables to confMarkus Armbruster
This is consistent with how VirtIOFOOConf variables are named elsewhere, and makes blk available for BlockBackend variables. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2014-10-20virtio-blk: Drop redundant VirtIOBlock member confMarkus Armbruster
Commit 12c5674 turned it into a pointer to member blk.conf. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Benoît Canet <benoit.canet@nodalink.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2014-10-20block: Rename BlockDriverCompletionFunc to BlockCompletionFuncMarkus Armbruster
I'll use it with block backends shortly, and the name is going to fit badly there. It's a block layer thing anyway, not just a block driver thing. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2014-10-20block: Rename BlockDriverAIOCB* to BlockAIOCB*Markus Armbruster
I'll use BlockDriverAIOCB with block backends shortly, and the name is going to fit badly there. It's a block layer thing anyway, not just a block driver thing. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2014-10-20block: Eliminate DriveInfo member bdrv, use blk_by_legacy_dinfo()Markus Armbruster
The patch is big, but all it really does is replacing dinfo->bdrv by blk_bs(blk_by_legacy_dinfo(dinfo)) The replacement is repetitive, but the conversion of device models to BlockBackend is imminent, and will shorten it to just blk_legacy_dinfo(dinfo). Line wrapping muddies the waters a bit. I also omit tests whether dinfo->bdrv is null, because it never is. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Benoît Canet <benoit.canet@nodalink.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2014-10-20block: Merge BlockBackend and BlockDriverState name spacesMarkus Armbruster
BlockBackend's name space is separate only to keep the initial patches simple. Time to merge the two. Retain bdrv_find() and bdrv_get_device_name() for now, to keep this series manageable. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2014-10-20block: Eliminate BlockDriverState member device_name[]Markus Armbruster
device_name[] can become non-empty only in bdrv_new_root() and bdrv_move_feature_fields(). The latter is used only to undo damage done by bdrv_swap(). The former is called only by blk_new_with_bs(). Therefore, when a BlockDriverState's device_name[] is non-empty, then it's been created with a BlockBackend, and vice versa. Furthermore, blk_new_with_bs() keeps the two names equal. Therefore, device_name[] is redundant. Eliminate it. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2014-10-20block: Eliminate bdrv_iterate(), use bdrv_next()Markus Armbruster
Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Benoît Canet <benoit.canet@nodalink.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2014-10-20blockdev: Eliminate drive_del()Markus Armbruster
drive_del() has become a trivial wrapper around blk_unref(). Get rid of it. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2014-10-20block: Make BlockBackend own its BlockDriverStateMarkus Armbruster
On BlockBackend destruction, unref its BlockDriverState. Replaces the callers' unrefs. This turns the pointer from BlockBackend to BlockDriverState into a strong reference, managed with bdrv_ref() / bdrv_unref(). The back-pointer remains weak. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2014-10-20block: Code motion to get rid of stubs/blockdev.cMarkus Armbruster
Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Benoît Canet <benoit.canet@nodalink.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2014-10-20block: Connect BlockBackend and DriveInfoMarkus Armbruster
Make the BlockBackend own the DriveInfo. Change blockdev_init() to return the BlockBackend instead of the DriveInfo. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2014-10-20block: Connect BlockBackend to BlockDriverStateMarkus Armbruster
Convenience function blk_new_with_bs() creates a BlockBackend with its BlockDriverState. Callers have to unref both. The commit after next will relieve them of the need to unref the BlockDriverState. Complication: due to the silly way drive_del works, we need a way to hide a BlockBackend, just like bdrv_make_anon(). To emphasize its "special" status, give the function a suitably off-putting name: blk_hide_on_behalf_of_do_drive_del(). Unfortunately, hiding turns the BlockBackend's name into the empty string. Can't avoid that without breaking the blk->bs->device_name equals blk->name invariant. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2014-10-20block: New BlockBackendMarkus Armbruster
A block device consists of a frontend device model and a backend. A block backend has a tree of block drivers doing the actual work. The tree is managed by the block layer. We currently use a single abstraction BlockDriverState both for tree nodes and the backend as a whole. Drawbacks: * Its API includes both stuff that makes sense only at the block backend level (root of the tree) and stuff that's only for use within the block layer. This makes the API bigger and more complex than necessary. Moreover, it's not obvious which interfaces are meant for device models, and which really aren't. * Since device models keep a reference to their backend, the backend object can't just be destroyed. But for media change, we need to replace the tree. Our solution is to make the BlockDriverState generic, with actual driver state in a separate object, pointed to by member opaque. That lets us replace the tree by deinitializing and reinitializing its root. This special need of the root makes the data structure awkward everywhere in the tree. The general plan is to separate the APIs into "block backend", for use by device models, monitor and whatever other code dealing with block backends, and "block driver", for use by the block layer and whatever other code (if any) dealing with trees and tree nodes. Code dealing with block backends, device models in particular, should become completely oblivious of BlockDriverState. This should let us clean up both APIs, and the tree data structures. This commit is a first step. It creates a minimal "block backend" API: type BlockBackend and functions to create, destroy and find them. BlockBackend objects are created and destroyed exactly when root BlockDriverState objects are created and destroyed. "Root" in the sense of "in bdrv_states". They're not yet used for anything; that'll come shortly. A root BlockDriverState is created with bdrv_new_root(), so where to create a BlockBackend is obvious. Where these roots get destroyed isn't always as obvious. It is obvious in qemu-img.c, qemu-io.c and qemu-nbd.c, and in error paths of blockdev_init(), blk_connect(). That leaves destruction of objects successfully created by blockdev_init() and blk_connect(). blockdev_init() is used only by drive_new() and qmp_blockdev_add(). Objects created by the latter are currently indestructible (see commit 48f364d "blockdev: Refuse to drive_del something added with blockdev-add" and commit 2d246f0 "blockdev: Introduce DriveInfo.enable_auto_del"). Objects created by the former get destroyed by drive_del(). Objects created by blk_connect() get destroyed by blk_disconnect(). BlockBackend is reference-counted. Its reference count never exceeds one so far, but that's going to change. In drive_del(), the BB's reference count is surely one now. The BDS's reference count is greater than one when something else is holding a reference, such as a block job. In this case, the BB is destroyed right away, but the BDS lives on until all extra references get dropped. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2014-10-20block: Split bdrv_new_root() off bdrv_new()Markus Armbruster
Creating an anonymous BDS can't fail. Make that obvious. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Benoît Canet <benoit.canet@nodalink.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-16 07:33:48 +0000