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2015-04-09block/iscsi: handle zero events from iscsi_which_eventsPeter Lieven
newer libiscsi versions may return zero events from iscsi_which_events. In this case iscsi_service will return immediately without any progress. To avoid busy waiting for iscsi_which_events to change we deregister all read and write handlers in this case and schedule a timer to periodically check iscsi_which_events for changed events. Next libiscsi version will introduce async reconnects and zero events are returned while libiscsi is waiting for a reconnect retry. Signed-off-by: Peter Lieven <pl@kamp.de> Message-id: 1428437295-29577-1-git-send-email-pl@kamp.de Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2015-04-08qcow2: Fix header update with overridden backing fileKevin Wolf
In recent qemu versions, it is possible to override the backing file name and format that is stored in the image file with values given at runtime. In such cases, the temporary override could end up in the image header if the qcow2 header was updated, while obviously correct behaviour would be to leave the on-disk backing file path/format unchanged. Fix this and add a test case for it. Reported-by: Michael Tokarev <mjt@tls.msk.ru> Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Message-id: 1428411796-2852-1-git-send-email-kwolf@redhat.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2015-03-19Merge remote-tracking branch 'remotes/kevin/tags/for-upstream' into stagingPeter Maydell
Block patches for 2.3.0-rc1 # gpg: Signature made Thu Mar 19 15:03:26 2015 GMT using RSA key ID C88F2FD6 # gpg: Good signature from "Kevin Wolf <kwolf@redhat.com>" * remotes/kevin/tags/for-upstream: block: Fix blockdev-backup not to use funky error class raw-posix: Deprecate aio=threads fallback without O_DIRECT raw-posix: Deprecate host floppy passthrough Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2015-03-19Merge remote-tracking branch ↵Peter Maydell
'remotes/mjt/tags/pull-trivial-patches-2015-03-19' into staging trivial patches for 2015-03-19 # gpg: Signature made Thu Mar 19 08:57:54 2015 GMT using RSA key ID A4C3D7DB # gpg: Good signature from "Michael Tokarev <mjt@tls.msk.ru>" # gpg: aka "Michael Tokarev <mjt@corpit.ru>" # gpg: aka "Michael Tokarev <mjt@debian.org>" * remotes/mjt/tags/pull-trivial-patches-2015-03-19: (24 commits) qga/commands-posix: Fix resource leak elf-loader: Add missing error handling for call of lseek elf-loader: Fix truncation warning from coverity hmp: Fix texinfo documentation Fix typos in comments qtest/ahci: Fix a bit mask expression vl: fix resource leak with monitor_fdset_add_fd smbios: add max speed comdline option for type-17 (meory device) structure pc-dimm: Add description for device list. configure: enable kvm on x32 error: Replace error_report() & error_free() with error_report_err() arm: fix memory leak qmp: Drop unused .user_print from command definitions hmp: Fix definition of command quit target-moxie: Fix warnings from Sparse (one-bit signed bitfield) block/qapi: Fix Sparse warning Fix remaining warnings from Sparse (void return) qom: Fix warning from Sparse target-mips: Fix warning from Sparse arm/nseries: Fix warnings from Sparse ... Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2015-03-19raw-posix: Deprecate aio=threads fallback without O_DIRECTKevin Wolf
Currently, if the user requests aio=native, but forgets to choose a cache mode that sets O_DIRECT, that request is silently ignored and raw falls back to aio=threads. Deprecate that behaviour so we can make it an error in future qemu versions. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com>
2015-03-19raw-posix: Deprecate host floppy passthroughMarkus Armbruster
Raise your hand if you have a physical floppy drive in a computer you've powered on in 2015. Okay, I see we got a few weirdos in the audience. That's okay, weirdos are welcome here. Kidding aside, media change detection doesn't fully work, isn't going to be fixed, and floppy passthrough just isn't earning its keep anymore. Deprecate block driver host_floppy now, so we can drop it after a grace period. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Gerd Hoffmann <kraxel@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2015-03-19block/qapi: Fix Sparse warningStefan Weil
Sparse reports this warning: block/qapi.c:417:47: warning: too long initializer-string for array of char(no space for nul char) Replacing the string by an array of characters fixes this warning. Signed-off-by: Stefan Weil <sw@weilnetz.de> Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2015-03-18nbd: Set block size to BDRV_SECTOR_SIZEMax Reitz
Signed-off-by: Max Reitz <mreitz@redhat.com> Message-Id: <1424887718-10800-13-git-send-email-mreitz@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-03-18nbd: Fix nbd_establish_connection()'s return valueMax Reitz
unix_connect_opts() and inet_connect_opts() do not necessarily set errno (if at all); therefore, nbd_establish_connection() should not literally return -errno on error. Signed-off-by: Max Reitz <mreitz@redhat.com> Message-Id: <1424887718-10800-4-git-send-email-mreitz@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-03-16block/vpc: remove disabled code from get_sector_offsetPeter Lieven
The code to check the bitmap for the allocation status of each sector has been "disabled by reason" ever since the vpc driver existed. The reason might be that we might end up reading sector by sector in vpc_read if we really used it. This would be a performance desaster. The current code would furthermore not work if the disabled parts get reactivated since vpc_read and vpc_write only use get_sector_offset to check the allocation status of the first sector of a read/write operation. This might lead to sectors incorrectly treated as zero in vpc_read and to sectors getting allocated twice in vpc_write. Signed-off-by: Peter Lieven <pl@kamp.de> Message-id: 1425379316-19639-6-git-send-email-pl@kamp.de Reviewed-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Max Reitz <mreitz@redhat.com>
2015-03-16block/vpc: rename footer->size -> footer->current_sizePeter Lieven
the field is named current size in the spec. Name it accordingly. Signed-off-by: Peter Lieven <pl@kamp.de> Reviewed-by: Max Reitz <mreitz@redhat.com> Message-id: 1425379316-19639-5-git-send-email-pl@kamp.de Signed-off-by: Max Reitz <mreitz@redhat.com>
2015-03-16block/vpc: make calculate_geometry spec conformPeter Lieven
The VHD spec [1] allows for total_sectors of 65535 x 16 x 255 (~127GB) represented by a CHS geometry. If total_sectors is greater than 65535 x 16 x 255 this geometry is set as a maximum. Qemu, Hyper-V and disk2vhd use this special geometry as an indicator to use the image current size from the footer as disk size. This patch changes vpc_create to effectively calculate a CxHxS geometry for the given image size if possible while rounding up if necessary. If the image size is too big to be represented in CHS we set the maximum and write the exact requested image size into the footer. This partly reverts commit 258d2edb, but leaves support for >127G disks intact. [1] http://download.microsoft.com/download/f/f/e/ffef50a5-07dd-4cf8-aaa3-442c0673a029/Virtual%20Hard%20Disk%20Format%20Spec_10_18_06.doc Signed-off-by: Peter Lieven <pl@kamp.de> Message-id: 1425379316-19639-4-git-send-email-pl@kamp.de Reviewed-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Max Reitz <mreitz@redhat.com>
2015-03-16vpc: Ignore geometry for large imagesKevin Wolf
The CHS calculation as done per the VHD spec imposes a maximum image size of ~127 GB. Real VHD images exist that are larger than that. Apparently there are two separate non-standard ways to achieve this: You could use more heads than the spec does - this is the option that qemu-img create chooses. However, other images exist where the geometry is set to the maximum (65535/16/255), but the actual image size is larger. Until now, such images are truncated at 127 GB when opening them with qemu. This patch changes the vpc driver to ignore geometry in this case and only trust the size field in the header. Signed-off-by: Kevin Wolf <kwolf@redhat.com> [PL: Fixed maximum geometry in the commit msg] Signed-off-by: Peter Lieven <pl@kamp.de> Message-id: 1425379316-19639-3-git-send-email-pl@kamp.de Reviewed-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Max Reitz <mreitz@redhat.com>
2015-03-16block/vpc: optimize vpc_co_get_block_statusPeter Lieven
*pnum can't be greater than s->block_size / BDRV_SECTOR_SIZE for allocated sectors since there is always a bitmap in between. Signed-off-by: Peter Lieven <pl@kamp.de> Reviewed-by: Max Reitz <mreitz@redhat.com> Message-id: 1425379316-19639-2-git-send-email-pl@kamp.de Signed-off-by: Max Reitz <mreitz@redhat.com>
2015-03-16qcow2: Respect new_block in alloc_refcount_block()Max Reitz
When choosing a new place for the refcount table, alloc_refcount_block() tries to infer the number of clusters used so far from its argument cluster_index (which comes from the idea that if any cluster with an index greater than cluster_index was in use, the refcount table would have to be big enough already to describe cluster_index). However, there is a cluster that may be at or after cluster_index, and which is not covered by the refcount structures, and that is the new refcount block new_block. Therefore, it should be taken into account for the blocks_used calculation. Also, because new_block already describes (or is intended to describe) cluster_index, we may not put the new refcount structures there. Signed-off-by: Max Reitz <mreitz@redhat.com> Message-id: 1423598552-24301-2-git-send-email-mreitz@redhat.com Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com> Signed-off-by: Max Reitz <mreitz@redhat.com>
2015-03-16block: Fix block-set-write-threshold not to use funky error classMarkus Armbruster
Error classes are a leftover from the days of "rich" error objects. New code should always use ERROR_CLASS_GENERIC_ERROR. Commit e246211 added a use of ERROR_CLASS_DEVICE_NOT_FOUND. Replace it. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2015-03-12qcow2: fix the macro QCOW_MAX_L1_SIZE's useWen Congyang
QCOW_MAX_L1_SIZE's unit is byte, and l1_size's unit is l1 table entry size(8 bytes). Signed-off-by: Wen Congyang <wency@cn.fujitsu.com> Message-id: 54FFB0F1.5010307@cn.fujitsu.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2015-03-10Merge remote-tracking branch 'remotes/bonzini/tags/for-upstream' into stagingPeter Maydell
- scsi: improvements to error reporting and conversion to realize, Coverity/sparse fix for iscsi driver - RCU fallout: fix -daemonize and s390x system emulation - KVM: kvm_stat improvements and new man page - x86: SYSRET fix for VxWorks # gpg: Signature made Tue Mar 10 10:18:45 2015 GMT using RSA key ID 78C7AE83 # gpg: Good signature from "Paolo Bonzini <bonzini@gnu.org>" # gpg: aka "Paolo Bonzini <pbonzini@redhat.com>" # gpg: WARNING: This key is not certified with a trusted signature! # gpg: There is no indication that the signature belongs to the owner. # Primary key fingerprint: 46F5 9FBD 57D6 12E7 BFD4 E2F7 7E15 100C CD36 69B1 # Subkey fingerprint: F133 3857 4B66 2389 866C 7682 BFFB D25F 78C7 AE83 * remotes/bonzini/tags/for-upstream: x86: fix SS selector in SYSRET scsi: Convert remaining PCI HBAs to realize() scsi: Improve error reporting for invalid drive property hw: Propagate errors through qdev_prop_set_drive() scsi: Clean up duplicated error in legacy if=scsi code cpus: initialize cpu->memory_dispatch rcu: handle forks safely qemu-thread: do not use PTHREAD_MUTEX_ERRORCHECK kvm_stat: add kvm_stat.1 man page kvm_stat: add column headers to text UI iscsi: Fix check for username Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2015-03-10Merge remote-tracking branch 'remotes/kevin/tags/for-upstream' into stagingPeter Maydell
Block patches for 2.3 # gpg: Signature made Tue Mar 10 13:03:17 2015 GMT using RSA key ID C88F2FD6 # gpg: Good signature from "Kevin Wolf <kwolf@redhat.com>" * remotes/kevin/tags/for-upstream: (73 commits) MAINTAINERS: Add jcody as blockjobs, block devices maintainer iotests: add O_DIRECT alignment probing test block/raw-posix: fix launching with failed disks MAINTAINERS: Add jsnow as IDE maintainer sheepdog: Fix misleading error messages in sd_snapshot_create() Add testcase for scsi-hd devices without drive property scsi-hd: fix property unset case block/vdi: Add locking for parallel requests iotests: Drop vpc from 004's and 104's format list iotests: Remove 006 iotests: Fix 051's reference output virtio-blk: Remove the stale FIXME comment tests: Check QVIRTIO_F_ANY_LAYOUT flag in virtio-blk test libqos: Solve bug in interrupt checking when using MSIX in virtio-pci.c sheepdog: fix confused return values qtest/ahci: add fragmented dma test qtest/ahci: Add PIO and LBA48 tests qtest/ahci: Add DMA test variants libqos/ahci: add ahci command helpers qtest/ahci: Add a macro bootup routine ... Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2015-03-10block/raw-posix: fix launching with failed disksStefan Hajnoczi
Since commit c25f53b06eba1575d5d0e92a0132455c97825b83 ("raw: Probe required direct I/O alignment") QEMU has failed to launch if image files produce I/O errors. Previously, QEMU would launch successfully and the guest would see the errors when attempting I/O. This is a regression and may prevent multipath I/O inside the guest, where QEMU must launch and let the guest figure out by itself which disks are online. Tweak the alignment probing code in raw-posix.c to explicitly look for EINVAL on Linux instead of bailing. The kernel refuses misaligned requests with this error code and other error codes can be ignored. Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2015-03-10sheepdog: Fix misleading error messages in sd_snapshot_create()Markus Armbruster
If do_sd_create() fails, it first reports the error returned, then reports a another one with strerror(errno). errno is meaningless at that point. Report just one error combining the valid information from both messages. Reported-by: Eric Blake <eblake@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Liu Yuan <namei.unix@gmail.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2015-03-10block/vdi: Add locking for parallel requestsMax Reitz
When allocating a new cluster, the first write to it must be the one doing the allocation, because that one pads its write request to the cluster size; if another write to that cluster is executed before it, that write will be overwritten due to the padding. See https://bugs.launchpad.net/qemu/+bug/1422307 for what can go wrong without this patch. Cc: qemu-stable <qemu-stable@nongnu.org> Signed-off-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2015-03-10sheepdog: fix confused return valuesLiu Yuan
These functions mix up -1 and -errno in return values and would might cause trouble error handling in the call chain. This patch let them return -errno and add some comments. Cc: qemu-devel@nongnu.org Cc: Markus Armbruster <armbru@redhat.com> Cc: Kevin Wolf <kwolf@redhat.com> Cc: Stefan Hajnoczi <stefanha@redhat.com> Reported-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Liu Yuan <liuyuan@cmss.chinamobile.com> Message-id: 1424231875-7131-1-git-send-email-namei.unix@gmail.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2015-03-10block-backend: Add wrappers for blocksizes and geometry probingEkaterina Tumanova
Signed-off-by: Ekaterina Tumanova <tumanova@linux.vnet.ibm.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Message-id: 1424087278-49393-5-git-send-email-tumanova@linux.vnet.ibm.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2015-03-10block: Add driver methods to probe blocksizes and geometryEkaterina Tumanova
Introduce driver methods of defining disk blocksizes (physical and logical) and hard drive geometry. Methods are only implemented for "host_device". For "raw" devices driver calls child's method. For now geometry detection will only work for DASD devices. To check that a local check_for_dasd function was introduced. It calls BIODASDINFO2 ioctl and returns its rc. Blocksizes detection function will probe sizes for DASD devices. Signed-off-by: Ekaterina Tumanova <tumanova@linux.vnet.ibm.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Message-id: 1424087278-49393-4-git-send-email-tumanova@linux.vnet.ibm.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2015-03-10raw-posix: Factor block size detection out of raw_probe_alignment()Ekaterina Tumanova
Put it in new probe_logical_blocksize(). Signed-off-by: Ekaterina Tumanova <tumanova@linux.vnet.ibm.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Message-id: 1424087278-49393-3-git-send-email-tumanova@linux.vnet.ibm.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2015-03-10blkdebug: fix "once" ruleJohn Snow
Background: The blkdebug scripts are currently engineered so that when a debug event occurs, a prefilter browses a master list of parsed rules for a certain event and adds them to an "active list" of rules to be used for the forthcoming action, provided the events and state numbers match. Then, once the request is received, the last active rule is used to inject an error if certain parameters match. This active list is cleared every time the prefilter injects a new rule for the first time during a debug event. The "once" rule currently causes the error injection, if it is triggered, to only clear the active list. This is insufficient for preventing future injections of the same rule. Remedy: This patch /deletes/ the rule from the list that the prefilter browses, so it is gone for good. In V2, we remove only the rule of interest from the active list instead of allowing the "once" rule to clear the entire list of active rules. Impact: This affects iotests 026. Several ENOSPC tests that used "once" can be seen to have output that shows multiple failure messages. After this patch, the error messages tend to be smaller and less severe, but the injection can still be seen to be working. I have patched the expected output to expect the smaller error messages. Signed-off-by: John Snow <jsnow@redhat.com> Message-id: 1423257977-25630-1-git-send-email-jsnow@redhat.com Reviewed-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2015-03-10qcow2: Allow creation with refcount order != 4Max Reitz
Add a creation option to qcow2 for setting the refcount order of images to be created, and respect that option's value. This breaks some test outputs, fix them. Signed-off-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2015-03-10qcow2: Use symbolic macros in qcow2_amend_optionsMax Reitz
qcow2_amend_options() should not compare options against some inline strings but rather use the symbolic macros available for each of the creation options. Signed-off-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2015-03-10qcow2: refcount_order parameter for qcow2_create2Max Reitz
Add a refcount_order parameter to qcow2_create2(), use that value for the image header and for calculating the size required for preallocation. For now, always pass 4. This addition requires changes to the calculation of the file size for the "full" and "falloc" preallocation modes. That in turn is a nice opportunity to add a comment about that calculation not necessarily being exact (and that being intentional). Signed-off-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2015-03-10qcow2: Open images with refcount order != 4Max Reitz
No longer refuse to open images with a different refcount entry width than 16 bits; only reject images with a refcount width larger than 64 bits (which is prohibited by the specification). Signed-off-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2015-03-10qcow2: More helpers for refcount modificationMax Reitz
Add helper functions for getting and setting refcounts in a refcount array for any possible refcount order, and choose the correct one during refcount initialization. Signed-off-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2015-03-10qcow2: Helper function for refcount modificationMax Reitz
Since refcounts do not always have to be a uint16_t, all refcount blocks and arrays in memory should not have a specific type (thus they become pointers to void) and for accessing them, two helper functions are used (a getter and a setter). Those functions are called indirectly through function pointers in the BDRVQcowState so they may later be exchanged for different refcount orders. With the check and repair functions using this function, the refcount array they are creating will be in big endian byte order; additionally, using realloc_refcount_array() makes the size of this refcount array always cluster-aligned. Both combined allow rebuild_refcount_structure() to drop the bounce buffer which was used to convert parts of the refcount array to big endian byte order and store them on disk. Instead, those parts can now be written directly. [ kwolf: Fixed a build failure on 32 bit and another with old glib ] Signed-off-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2015-03-10qcow2: Helper for refcount array reallocationMax Reitz
Add a helper function for reallocating a refcount array, independent of the refcount order. The newly allocated space is zeroed and the function handles failed reallocations gracefully. The helper function will always align the buffer size to a cluster boundary; if storing the refcounts in such an array in big endian byte order, this makes it possible to write parts of the array directly as refcount blocks into the image file. Signed-off-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2015-03-10qcow2: Use 64 bits for refcount valuesMax Reitz
Refcounts may have a width of up to 64 bits, so qemu should use the same width to represent refcount values internally. Signed-off-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2015-03-10qcow2: Use unsigned addend for update_refcount()Max Reitz
update_refcount() and qcow2_update_cluster_refcount() currently take a signed addend. At least one caller passes a value directly derived from an absolute refcount that should be reached ("l2_refcount - 1" in expand_zero_clusters_in_l1()). Therefore, the addend should be unsigned as well; this will be especially important for 64 bit refcounts. Because update_refcount() then no longer knows whether the refcount should be increased or decreased, it now requires an additional flag which specified exactly that. The same applies to qcow2_update_cluster_refcount(). Signed-off-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2015-03-10qcow2: Only return status from qcow2_get_refcountMax Reitz
Refcounts can theoretically be of type uint64_t; in order to be able to represent the full range, qcow2_get_refcount() cannot use a single variable to represent both all refcount values and also keep some values reserved for errors. One solution would be to add an Error pointer parameter to qcow2_get_refcount(); however, no caller could (currently) pass that error message, so it would have to be emitted immediately and be passed to the next caller by returning -EIO or something similar. Therefore, an Error parameter does not offer any advantages here. The solution applied by this patch is simpler to use. Because no caller would be able to pass the error message, they would have to print it and free it, whereas with this patch the caller only needs to pass the returned integer (which is often a no-op from the code perspective, because that integer will be stored in a variable "ret" which will be returned by the fail path of many callers). Signed-off-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2015-03-10qcow2: Do not return new value after refcount updateMax Reitz
qcow2_update_cluster_refcount() does not have any quick access to the new refcount value, it has to call qcow2_get_refcount(). Some callers do not need that new value at all, others call qcow2_get_refcount() themselves anyway (albeit in a different code path, which can however be easily changed), therefore there is no advantage in making qcow2_update_cluster_refcount() return the new value. Drop it. Signed-off-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2015-03-10qcow2: Add refcount_bits to format-specific infoMax Reitz
Add the bit width of every refcount entry to the format-specific information. In contrast to lazy_refcounts and the corrupt flag, this should be always emitted, even for compat=0.10 although it does not support any refcount width other than 16 bits. This is because if a boolean is optional, one normally assumes it to be false when omitted; but if an integer is not specified, it is rather difficult to guess its value. This new field breaks some test outputs, fix them. Signed-off-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2015-03-10qcow2: Add two new fields to BDRVQcowStateMax Reitz
Add two new fields regarding refcount information (the bit width of every entry and the maximum refcount value) to the BDRVQcowState. Signed-off-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2015-03-10iscsi: Fix check for usernameStefan Weil
The variable user in struct iscsi_url is a character array, not a pointer. Therefore its address will never be NULL. clang reports this error: block/iscsi.c:1329:20: warning: comparison of array 'iscsi_url->user' not equal to a null pointer is always true [-Wtautological-pointer-compare] Reviewed-by: Peter Lieven <pl@kamp.de> Acked-by: Peter Lieven <pl@kamp.de> Signed-off-by: Stefan Weil <sw@weilnetz.de> Message-Id: <1425719670-5486-1-git-send-email-sw@weilnetz.de> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-03-10nbd: fix resource leakGonglei
Signed-off-by: Gonglei <arei.gonglei@huawei.com> Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2015-03-10block: remove superfluous '\n' around error_report/error_setgGonglei
Signed-off-by: Gonglei <arei.gonglei@huawei.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2015-03-09qcow2: Remove unused struct QCowCreateStateKevin Wolf
The only user went away five years ago with commit a9420734 ('qcow2: Simplify image creation'). It's about time to remove it. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
2015-03-09block/raw-posix: fix compilation warning on OSXDenis V. Lunev
block/raw-posix.c:947:19: warning: unused variable 's' [-Wunused-variable] BDRVRawState *s = aiocb->bs->opaque; This variable is used only when on of the following macros are defined CONFIG_XFS, CONFIG_FALLOCATE, CONFIG_FALLOCATE_PUNCH_HOLE or CONFIG_FALLOCATE_ZERO_RANGE. Fortunately, CONFIG_FALLOCATE_PUNCH_HOLE and CONFIG_FALLOCATE_ZERO_RANGE could be defined only along with CONFIG_FALLOCATE. Therefore checking for CONFIG_XFS or CONFIG_FALLOCATE would be enough. Signed-off-by: Denis V. Lunev <den@openvz.org> CC: Peter Maydell <peter.maydell@linaro.org> CC: Kevin Wolf <kwolf@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2015-03-09sheepdog: selectable object size supportTeruaki Ishizaki
Previously, qemu block driver of sheepdog used hard-coded VDI object size. This patch enables users to handle VDI object size. When you start qemu, you don't need to specify additional command option. But when you create the VDI which doesn't have default object size with qemu-img command, you specify object_size option. If you want to create a VDI of 8MB object size, you need to specify following command option. # qemu-img create -o object_size=8M sheepdog:test1 100M In addition, when you don't specify qemu-img command option, a default value of sheepdog cluster is used for creating VDI. # qemu-img create sheepdog:test2 100M Signed-off-by: Teruaki Ishizaki <ishizaki.teruaki@lab.ntt.co.jp> Acked-by: Hitoshi Mitake <mitake.hitoshi@lab.ntt.co.jp> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2015-03-09vpc: Implement bdrv_co_get_block_status()Kevin Wolf
This implements bdrv_co_get_block_status() for VHD images. This can significantly speed up qemu-img convert operation because only with this function implemented sparseness can be considered. (Before, converting a 1 TB empty image took several minutes for me, now it's instantaneous.) Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com>
2015-03-09vpc: Fix size in fixed image creationKevin Wolf
If total_sectors is rounded to match the geometry, total_size needs to be changed as well. Otherwise we end up with an image whose geometry describes a disk larger than the image file, which doesn't end well. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com>
2015-03-03Merge remote-tracking branch 'remotes/bonzini/tags/for-upstream' into stagingPeter Maydell
- more config options - bootdevice, iscsi, virtio-scsi fixes - build system patches for MinGW and config-devices.mak - qemu_mutex_lock_iothread deadlock fixes - another tiny patch from the record/replay series # gpg: Signature made Mon Mar 2 09:59:14 2015 GMT using RSA key ID 78C7AE83 # gpg: Good signature from "Paolo Bonzini <bonzini@gnu.org>" # gpg: aka "Paolo Bonzini <pbonzini@redhat.com>" # gpg: WARNING: This key is not certified with a trusted signature! # gpg: There is no indication that the signature belongs to the owner. # Primary key fingerprint: 46F5 9FBD 57D6 12E7 BFD4 E2F7 7E15 100C CD36 69B1 # Subkey fingerprint: F133 3857 4B66 2389 866C 7682 BFFB D25F 78C7 AE83 * remotes/bonzini/tags/for-upstream: cpus: be more paranoid in avoiding deadlocks cpus: fix deadlock and segfault in qemu_mutex_lock_iothread virtio-scsi: Allocate op blocker reason before blocking Makefile.target: binary depends on config-devices Makefile: don't silence mak file test with V=1 Makefile: fix up parallel building under MSYS+MinGW iscsi: Handle write protected case in reopen Give ivshmem its own config option Create specific config option for "platform-bus" Add specific config options for PCI-E bridges bootdevice: fix segment fault when booting guest with '-kernel' and '-initrd' timer: replace time() with QEMU_CLOCK_HOST virtio-scsi-dataplane: Call blk_set_aio_context within BQL block: Forbid bdrv_set_aio_context outside BQL scsi: give device a parent before setting properties Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2015-02-27iscsi: Handle write protected case in reopenFam Zheng
Save the write protected flag and check before reopen. Signed-off-by: Fam Zheng <famz@redhat.com> Message-Id: <1424839208-5195-1-git-send-email-famz@redhat.com> [Fixed typo in the name of the new field. - Paolo] Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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