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2012-04-19aio: return "AIO in progress" state from qemu_aio_waitPaolo Bonzini
The definition of when qemu_aio_flush should loop is much simpler than it looks. It just has to call qemu_aio_wait until it makes no progress and all flush callbacks return false. qemu_aio_wait is the logical place to tell the caller about this. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-04-19aio: remove process_queue callback and qemu_aio_process_queuePaolo Bonzini
Both unused after the previous patch. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-04-19nbd: do not block in nbd_wr_sync if no data at all is availablePaolo Bonzini
Right now, nbd_wr_sync will hang if no data at all is available on the socket and the other side is not going to provide any. Relax this by making it loop only for writes or partial reads. This fixes a race where one thread is executing qemu_aio_wait() and another is executing main_loop_wait(). Then, the select() call in main_loop_wait() can return stale data and call the "readable" callback with no data in the socket. Reported-by: Laurent Vivier <laurent@vivier.eu> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-04-19nbd: consistently return negative errno valuesPaolo Bonzini
In the next patch we need to look at the return code of nbd_wr_sync. To avoid percolating the socket_error() ugliness all around, let's handle errors by returning negative errno values. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-04-19nbd: consistently check for <0 or >=0Paolo Bonzini
This prepares for the following patch, which changes -1 return values to negative errno. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-04-19nbd: consistently use ssize_tPaolo Bonzini
GCC (pedantically, but correctly) considers that a negative ssize_t may become positive when casted to int. This may cause uninitialized variable warnings when a function returns such a negative ssize_t and is inlined. Propagate ssize_t return types to avoid this. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-04-19nbd: avoid out of bounds access to recv_coroutine arrayPaolo Bonzini
This can happen with a buggy or malicious server. Reported-by: Michael Tokarev <mjt@tls.msk.ru> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-04-19posix-aio: merge posix_aio_process_queue and posix_aio_readPaolo Bonzini
posix_aio_read already calls qemu_aio_process_queue, and dually qemu_aio_process_queue is always followed by a select loop that calls posix_aio_read. No races are possible, so there is no need for a separate process_queue callback. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-04-19qemu-tool: map vm_clock to rt_clockPaolo Bonzini
QED uses vm_clock timers so that images are not touched during and after migration. This however does not apply to qemu-io and qemu-img. Treat vm_clock as a synonym for rt_clock there, and enable it. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-04-19qemu-io: use main_loop_waitPaolo Bonzini
This will let timers run during aio_read and aio_write commands, though not during synchronous commands. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-04-19scsi: add SANITIZE commandPaolo Bonzini
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-04-19SCSI emulation: should tell the guest that we actually support thin provisioningRonnie Sahlberg
Signed-off-by: Ronnie Sahlberg <ronniesahlberg@gmail.com> [Actually, we should report it only if discard_granularity is nonzero. Older SBC drafts assigned 0 to thin provisioning and 1 to thick (resource-provisioned, they call it). Newer drafts assign respectively 1 and 2 - Paolo] Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-04-19SCSI emulation: Support unmap via WRITE_SAME_10.Ronnie Sahlberg
This was added in SBC r26 in place of the reserved bits that were present up to that version. It is the same as WRITE_SAME_16 as far as QEMU is concerned. Signed-off-by: Ronnie Sahlberg <ronniesahlberg@gmail.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-04-19scsi: advertise DPOFUAPaolo Bonzini
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-04-19scsi: small refactoring of MMC mode-sensePaolo Bonzini
Make DBD a boolean value, and force device-specific parameter to zero. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-04-19scsi: support FUA on readsPaolo Bonzini
To force unit access on reads, flush the cache *before* doing the read. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-04-19scsi: add a started field to SCSIDiskReqPaolo Bonzini
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-04-19scsi: force unit access on VERIFYPaolo Bonzini
Also DMA data from the host, to avoid that the host reports an underrun. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-04-19block: allow interrupting a co_sleep_nsPaolo Bonzini
In the next patch we want to reenter the coroutine from block_job_cancel_sync and cancel the timer. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-04-19qcow2: Fix return value of alloc_refcount_blockKevin Wolf
Someone forgot something in commit 29c1a730... Documenting the right return value is not enough, you also need to actually return it in the code. This bug sometimes causes error return values even when everything has succeeded: The new offset of the refcount block is truncated to 32 bits and interpreted as signed. At least with small cluster sizes it's easy to get a negative return value this way. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
2012-04-19qcow2: Fix error handling in qcow2_alloc_cluster_offsetKevin Wolf
If do_alloc_cluster_offset() fails, the error handling code tried to remove the request from the in-flight queue, to which it wasn't added yet, resulting in a NULL pointer dereference. m->nb_clusters really only becomes != 0 when the request is in the list. Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-04-19ide: convert ide_sector_write() to asynchronous I/OStefan Hajnoczi
The IDE PIO write sector code path uses bdrv_write() and hence can make the guest unresponsive while the I/O request is in progress. This patch converts ide_sector_write() to use bdrv_aio_writev() by using the BUSY_STAT bit to tell the guest that the request is in progress. Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Reviewed-by: Zhi Yong Wu <wuzhy@linux.vnet.ibm.com> Tested-by: Richard Davies <richard@arachsys.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-04-19ide: convert ide_sector_read() to asynchronous I/OStefan Hajnoczi
The IDE PIO interface currently uses bdrv_read() to perform reads synchronously. Synchronous I/O in the vcpu thread is bad because it prevents the guest from executing code - it makes the guest unresponsive. This patch converts IDE PIO to use bdrv_aio_readv(). We simply need to use the BUSY_STAT status so the guest knows to wait while we are busy. The only external user of ide_sector_read() is restart behavior on I/O errors and it is not affected by this change. We still need to restart I/O in the same way. Migration is also unaffected if I understand the code correctly. We continue to use the same transfer function and the BUSY_STAT status should never be migrated since we flush I/O before migrating device state. Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Reviewed-by: Zhi Yong Wu <wuzhy@linux.vnet.ibm.com> Tested-by: Richard Davies <richard@arachsys.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-04-19qemu-io: Add command line switch for cache modeKevin Wolf
To be used as in 'qemu-io -t writeback test.img' Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
2012-04-19block: Fix spelling in comment (ineffcient -> inefficient)Stefan Weil
Signed-off-by: Stefan Weil <sw@weilnetz.de> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-04-19iotests: fix error in 005Dong Xu Wang
According comment, we should not read again, we will write. Signed-off-by: Dong Xu Wang <wdongxu@linux.vnet.ibm.com> Reviewed-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-04-19block: Drain requests in bdrv_closeKevin Wolf
If an AIO request is in flight that refers to a BlockDriverState that has been closed and possibly even freed, more or less anything could happen. I have seen segfaults, -EBADF return values and qcow2 sometimes actually catches the situation in bdrv_close() and abort()s. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
2012-04-19qemu-iotests: Test bdrv_close while AIO is in flightKevin Wolf
If the BlockDriverState is closed/freed without draining the AIO requests first, the request coroutines may work on invalid data and file descriptors or have some dangling pointers that cause segfaults. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
2012-04-19qemu-iotests: Always filter cluster_size out in _make_test_imgKevin Wolf
Some image formats do have a cluster size, others don't, but there are tests that work with both sets of images and currently we get failures because the qemu-img create output doesn't mention the cluster size for some formats. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
2012-04-19scsi: add support for FUA on writesPaolo Bonzini
To force unit access, add a flush operation after the actual write. WRITE AND VERIFY commands always flush according to SBC, so do it even though we do not perform the reread. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-04-19scsi: move scsi_flush_complete aroundPaolo Bonzini
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-04-19scsi: make code more homogeneous in AIO callback functionsPaolo Bonzini
First scsi_flush_complete, like scsi_dma_complete, is always called with an active AIOCB. Second, always test for "ret < 0" to check for errors. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-04-19scsi: add missing test for cancelled requestPaolo Bonzini
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-04-19virtio-scsi: add multiqueue capabilityPaolo Bonzini
Adding multiqueue is as simple as creating more than one virtqueues, and saving the queue number for each request. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-04-19virtio: add virtio_queue_get_idPaolo Bonzini
Serializing virtio-scsi requests needs a simple way to get from a VirtQueue to the number of the queue. The virtio_queue_get_id provides this. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-04-19virtio-scsi: prepare migration format for multiqueuePaolo Bonzini
In order to restore requests correctly from a multitude of virtqueues, we need to store the id of the request queue that each request came from. Do this even for single-queue, by storing a hard-coded zero, to simplify future implementation of multiqueue. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-04-19scsi: fix memory leakPaolo Bonzini
scsibus_get_dev_path is leaking id if it is not NULL. Fix it. Reported-by: Laszlo Ersek <lersek@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-04-18Merge remote-tracking branch 'origin/master' into stagingAnthony Liguori
* origin/master: Allow controlling volume with PulseAudio backend configure: pa_simple is not needed anymore Do not use pa_simple PulseAudio API audio/spice: add support for volume control hw/ac97: add support for volume control hw/ac97: the volume mask is not only 0x1f hw/ac97: remove USE_MIXER code audio: don't apply volume effect if backend has VOICE_VOLUME_CAP audio: add VOICE_VOLUME ctl
2012-04-18tracetool: handle DTrace keywords 'in', 'next', 'self'Stefan Hajnoczi
Language keywords cannot be used as argument names. The DTrace backend appends an underscore to the argument name in order to make the argument name legal. This patch adds 'in', 'next', and 'self' keywords to dtrace.py. Also drop the unnecessary argument name lstrip() call. The Arguments.build() method already ensures there is no space around argument names. Furthermore it is misleading to do the lstrip() *after* checking against keywords because the keyword check would not match if spaces were in the name. Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> Reviewed-by: Alon Levy <alevy@redhat.com> Reviewed-by: Lluís Vilanova <vilanova@ac.upc.edu>
2012-04-18tracetool: Add MAINTAINERS infoLluís Vilanova
Update the MAINTAINERS file to reflect the new Python tracetool code. [Commit description written by Stefan Hajnoczi] Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2012-04-18tracetool: Add support for the 'dtrace' backendLluís Vilanova
Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2012-04-18tracetool: Add support for the 'ust' backendLluís Vilanova
Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2012-04-18tracetool: Add support for the 'simple' backendLluís Vilanova
Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2012-04-18tracetool: Add support for the 'stderr' backendLluís Vilanova
Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2012-04-18tracetool: Add module for the 'h' formatLluís Vilanova
Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2012-04-18tracetool: Add module for the 'c' formatLluís Vilanova
Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2012-04-18tracetool: Rewrite infrastructure as python modulesLluís Vilanova
The tracetool script is written in shell and has hit several portability problems due to shell quirks or external tools across host platforms. Additionally the amount of string processing and lack of real data structures makes it tough to implement code generator backends for tracers that are more complex. This patch replaces the shell version of tracetool with a Python version. The new tracetool design is: scripts/tracetool.py - top-level script scripts/tracetool/backend/ - tracer backends live here (simple, ust) scripts/tracetool/format/ - output formats live here (.c, .h) There is common code for trace-events definition parsing so that backends can focus on generating code rather than parsing input. Support for all existing backends (nop, stderr, simple, ust, and dtrace) is added back in follow-up patches. [Commit description written by Stefan Hajnoczi] Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2012-04-18Merge remote-tracking branch 'spice/spice.v52' into stagingAnthony Liguori
* spice/spice.v52: qxl-render: fix broken vnc+spice since commit f934493 qxl: set default values of vram*_size_mb to -1 trace-events: remove unused qxl_vga_ioport_while_not_in_vga_mode
2012-04-18Merge remote-tracking branch 'kraxel/usb.46' into stagingAnthony Liguori
* kraxel/usb.46: (21 commits) usb-ehci: drop assert() usb-redir: Notify our peer when we reject a device due to a speed mismatch usb-ehci: Drop unused sofv value usb-host: rewrite usb_linux_update_endp_table usb: use USBDescriptor for endpoint descriptors. usb: use USBDescriptor for interface descriptors. usb: use USBDescriptor for config descriptors. usb: use USBDescriptor for device qualifier descriptors. usb: add USBDescriptor, use for device descriptors. usb-ehci: frindex always is a 14 bits counter usb-ehci: fix ehci_child_detach usb-hub: add tracepoints usb_packet_set_state: handle p->ep == NULL usb-host: add property to turn off pipelining usb-host: add usb packet to request tracepoints usb-host: trace canceled requests usb-host: trace emulated requests Add bootindex support to usb-host and usb-redir usb-uhci: queuing fix usb-uhci: stop queue filling when we find a in-flight td ...
2012-04-18qxl-render: fix broken vnc+spice since commit f934493Alon Levy
Notify any listeners such as vnc that the displaysurface has been changed, otherwise they will segfault when first accessing the freed old displaysurface data. Signed-off-by: Alon Levy <alevy@redhat.com> Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
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