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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>
2014-10-23iotests: Add test for qcow2 L1 table updateMax Reitz
Updating the L1 table should not result in random data being written. This adds a test for that. Signed-off-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2014-10-23qcow2: Do not overflow when writing an L1 sectorMax Reitz
While writing an L1 table sector, qcow2_write_l1_entry() copies the respective range from s->l1_table to the local "buf" array. The size of s->l1_table does not have to be a multiple of L1_ENTRIES_PER_SECTOR; thus, limit the index which is used for copying all entries to the L1 size. Cc: qemu-stable@nongnu.org Signed-off-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Peter Lieven <pl@kamp.de> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2014-10-23iotests: Add test for map commandsMax Reitz
Add a test for qemu-img map and qemu-io -c map on truncated files. Signed-off-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2014-10-23qemu-io: Respect early image end for mapMax Reitz
bdrv_is_allocated() may report zero clusters which most probably means the image (file) is shorter than expected. Respect this case in order to avoid an infinite loop. Signed-off-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Eric Blake <eblake@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>
2014-10-23block: Respect underlying file's EOFMax Reitz
When falling through to the underlying file in bdrv_co_get_block_status(), if it returns that the query offset is beyond the file end (by setting *pnum to 0), return the range to be zero and do not let the number of sectors for which information could be obtained be overwritten. Signed-off-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2014-10-23docs/qcow2: Limit refcount_order to [0, 6]Max Reitz
Specify the upper limit of refcount_order to be 6 (that is, refcount_bits = 64). Any larger value does not make much sense when all offsets, sizes, cluster counts etc. "only" have a width of 64 bit as well, and very large values would be very difficult to support. Therefore, just cap it at the largest reasonable value. Suggested-by: Eric Blake <eblake@redhat.com> Signed-off-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2014-10-23docs/qcow2: Correct refcount_block_entriesMax Reitz
A refblock entry may have a different size than 16 bits, it may even be smaller than a byte. Correct the refcount_block_entries calculation accordingly. Signed-off-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2014-10-23qcow2: Drop REFCOUNT_SHIFTMax Reitz
With BDRVQcowState.refcount_block_bits, we don't need REFCOUNT_SHIFT anymore. Signed-off-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2014-10-23iotests: Add test for potentially damaging repairsMax Reitz
There are certain cases where repairing a qcow2 image might actually damage it further (or rather, where repairing it has in fact damaged it further with the old qcow2 check implementation). This should not happen, so add a test for these cases. Furthermore, the repair function now repairs refblocks beyond the image end by resizing the image accordingly. Add several tests for this as well. Signed-off-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2014-10-23iotests: Fix test outputsMax Reitz
039, 060 and 061 all create images with referenced clusters having a refcount of 0. Because previous commits changed handling of such errors, these tests now have a different output. Fix it. Furthermore, 060 created a refblock with a refcount greater than one which now results in having to rebuild the refcount structure as well. Signed-off-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2014-10-23qcow2: Clean up after refcount rebuildMax Reitz
Because the old refcount structure will be leaked after having rebuilt it, we need to recalculate the refcounts and run a leak-fixing operation afterwards (if leaks should be fixed at all). Signed-off-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2014-10-23qcow2: Rebuild refcount structure during checkMax Reitz
The previous commit introduced the "rebuild" variable to qcow2's implementation of the image consistency check. Now make use of this by adding a function which creates a completely new refcount structure based solely on the in-memory information gathered before. The old refcount structure will be leaked, however. This leak will be dealt with in a follow-up commit. Signed-off-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2014-10-23qcow2: Do not perform potentially damaging repairsMax Reitz
If a referenced cluster has a refcount of 0, increasing its refcount may result in clusters being allocated for the refcount structures. This may overwrite the referenced cluster, therefore we cannot simply increase the refcount then. In such cases, we can either try to replicate all the refcount operations solely for the check operation, basing the allocations on the in-memory refcount table; or we can simply rebuild the whole refcount structure based on the in-memory refcount table. Since the latter will be much easier, do that. To prepare for this, introduce a "rebuild" boolean which should be set to true whenever a fix is rather dangerous or too complicated using the current refcount structures. Another example for this is refcount blocks being referenced more than once. Signed-off-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2014-10-23qcow2: Fix refcount blocks beyond image endMax Reitz
If the qcow2 check function detects a refcount block located beyond the image end, grow the image appropriately. This cannot break anything and is the logical fix for such a case. Signed-off-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2014-10-23qcow2: Reuse refcount table in calculate_refcounts()Max Reitz
We will later call calculate_refcounts multiple times, so reuse the refcount table if possible. Signed-off-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>
2014-10-23qcow2: Let inc_refcounts() resize the reftableMax Reitz
Now that the refcount table can be passed around by reference, do that for inc_refcounts() (and subsequently check_refcounts_l1() and check_refcounts_l2()) and use it for resizing it when a cluster after the image end is encountered. Signed-off-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2014-10-23qcow2: Let inc_refcounts() return -errnoMax Reitz
As of a future patch, inc_refcounts() will have to throw errors which are generally signaled by returning -errno. Therefore, let it return an integer which is either 0 for success or -errno and handle the -errno case in all callers. Signed-off-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2014-10-23qcow2: Split fail code in L1 and L2 checksMax Reitz
Instead of printing out an error message, incrementing check_errors and returning a fixed -errno, just do cleanups and return -ret, with ret set by the code which threw the exception (jumped to the fail label). Also, increment check_errors on error in check_refcounts_l2(). Signed-off-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2014-10-23qcow2: Use int64_t for in-memory reftable sizeMax Reitz
Use int64_t for the entry count of the in-memory refcount table throughout the check functions. Signed-off-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2014-10-23qcow2: Pull check_refblocks() upMax Reitz
Pull check_refblocks() before calculate_refcounts() so we can drop its static declaration. Signed-off-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>
2014-10-23qcow2: Use sizeof(**refcount_table)Max Reitz
When implementing variable refcounts, we want to be able to easily find all the places in qemu which are tied to a certain refcount order. Replace sizeof(uint16_t) in the check code by sizeof(**refcount_table) so we can later find it more easily. Signed-off-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2014-10-23qcow2: Split qcow2_check_refcounts()Max Reitz
Put the code for calculating the reference counts and comparing them during qemu-img check into own functions. Signed-off-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>
2014-10-23qcow2: Fix leaks in dirty imagesMax Reitz
When opening dirty images, qcow2's repair function should not only repair errors but leaks as well. Signed-off-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Eric Blake <eblake@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>
2014-10-23qcow2: Calculate refcount block entry countMax Reitz
The size of a refblock entry is (in theory) variable; calculate therefore the number of entries per refblock and the according bit shift (1 << x == entry count) when opening an image. Signed-off-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2014-10-23block: Add qemu_{,try_}blockalign0()Max Reitz
These functions call their non-0-counterparts and then fill the allocated buffer with 0 (if the allocation has been successful). Signed-off-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2014-10-23block: qemu-iotests change _supported_proto to file once more.Peter Lieven
In preparation to possible automatic regression and performance testing for the block layer I found that the iotests don't work for all protocols anymore. In commit 1f7bf7d0 I started to change supported protocols from generic to file for various tests. Unfortunately, some tests added in the meantime again carry generic protocol altough they can only work with file because they require local file access. The other way around for some tests that only support file I added NFS protocol after confirming they work. Signed-off-by: Peter Lieven <pl@kamp.de> Reviewed-by: Benoît Canet <benoit.canet@nodalink.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2014-10-23block/vdi: Use {DIV_,}ROUND_UPMax Reitz
There are macros for these operations, so make use of them. Signed-off-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2014-10-23MAINTAINERS: add the image fuzzer to the block layerPaolo Bonzini
More work for the block device maintainers! Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2014-10-23MAINTAINERS: qemu-iotests belongs to the block layerKevin Wolf
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2014-10-23MAINTAINERS: add aio to block layerPaolo Bonzini
AioContext falls under the block layer, mark it as such. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2014-10-23monitor: delete device_del_bus_completionZhu Guihua
device_del_bus_completion() that gathers devices from buses is unused; delete it. Signed-off-by: Zhu Guihua <zhugh.fnst@cn.fujitsu.com> Reviewed-by: Marcel Apfelbaum <marcel.a@redhat.com> Reviewed-by: Igor Mammedov <imammedo@redhat.com> Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
2014-10-23monitor: add del completion for peripheral deviceZhu Guihua
Add peripheral_device_del_completion() to let peripheral device del completion be possible. Signed-off-by: Zhu Guihua <zhugh.fnst@cn.fujitsu.com> Reviewed-by: Marcel Apfelbaum <marcel.a@redhat.com> Reviewed-by: Igor Mammedov <imammedo@redhat.com> Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
2014-10-23qdev: add qdev_build_hotpluggable_device_list helperZhu Guihua
For peripheral device del completion, add a function to build a list for hotpluggable devices. Signed-off-by: Zhu Guihua <zhugh.fnst@cn.fujitsu.com> Reviewed-by: Marcel Apfelbaum <marcel.a@redhat.com> Reviewed-by: Igor Mammedov <imammedo@redhat.com> Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
2014-10-23MAINTAINERS: add entry for qobject filesLuiz Capitulino
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
2014-10-23dump: Turn some functions to void to make code cleanerzhanghailiang
Functions shouldn't return an error code and an Error object at the same time. Turn all these functions that returning Error object to void. We also judge if a function success or fail by reference to the local_err. Signed-off-by: zhanghailiang <zhang.zhanghailiang@huawei.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
2014-10-23dump: Propagate errors into qmp_dump_guest_memory()zhanghailiang
The code calls dump_error() on error, and even passes it a suitable message. However, the message is thrown away, and its callers pass up only success/failure. All qmp_dump_guest_memory() can do is set a generic error. Propagate the errors properly, so qmp_dump_guest_memory() can return a more useful error. Signed-off-by: zhanghailiang <zhang.zhanghailiang@huawei.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
2014-10-23virtio-balloon: Tweak recent fix for integer overflowMarkus Armbruster
Commit 1f9296b avoids "other kinds of overflow" by limiting the polling interval to UINT_MAX. The computations to protect are done in 64 bits. This is indeed safe when unsigned is 32 bits, as it commonly is. It isn't when unsigned is 64 bits. Purely theoretical; I'm not aware of such a system. Limit it to UINT32_MAX instead. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Luiz Capitulino <lcapitulino@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>
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