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2012-05-30sheepdog: fix return value of do_load_save_vm_stateMORITA Kazutaka
bdrv_save_vmstate and bdrv_load_vmstate should return the vmstate size on success, and -errno on error. Signed-off-by: MORITA Kazutaka <morita.kazutaka@lab.ntt.co.jp> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-05-25sheepdog: use heap instead of stack for BDRVSheepdogStateMORITA Kazutaka
bdrv_create() is called in coroutine context now, so we cannot use more stack than 1 MB in the function if we use ucontext coroutine. This patch allocates BDRVSheepdogState, whose size is 4 MB, on the heap in sd_create(). Signed-off-by: MORITA Kazutaka <morita.kazutaka@lab.ntt.co.jp> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-05-25sheepdog: return -errno on errorMORITA Kazutaka
On error, BlockDriver APIs should return -errno instead of -1. Signed-off-by: MORITA Kazutaka <morita.kazutaka@lab.ntt.co.jp> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-05-25sheepdog: mark image as snapshot when tag is specifiedMORITA Kazutaka
When a snapshot tag is specified in the filename, the opened image is a snapshot. Signed-off-by: MORITA Kazutaka <morita.kazutaka@lab.ntt.co.jp> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-05-07sheepdog: switch to writethrough mode if cluster doesn't support flushMORITA Kazutaka
This is necessary for qemu to work with the older version of Sheepdog which doesn't support SD_OP_FLUSH_VDI. Signed-off-by: MORITA Kazutaka <morita.kazutaka@gmail.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>
2012-04-05sheepdog: fix send req helpersLiu Yuan
We should return if reading of the header fails. Cc: Kevin Wolf <kwolf@redhat.com> Cc: MORITA Kazutaka <morita.kazutaka@lab.ntt.co.jp> Signed-off-by: Liu Yuan <tailai.ly@taobao.com> Acked-by: MORITA Kazutaka <morita.kazutaka@lab.ntt.co.jp> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-04-05sheepdog: implement SD_OP_FLUSH_VDI operationLiu Yuan
Flush operation is supposed to flush the write-back cache of sheepdog cluster. By issuing flush operation, we can assure the Guest of data reaching the sheepdog cluster storage. Cc: Kevin Wolf <kwolf@redhat.com> Cc: MORITA Kazutaka <morita.kazutaka@lab.ntt.co.jp> Signed-off-by: Liu Yuan <tailai.ly@taobao.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-02-09sheepdog: fix co_recv coroutine contextMORITA Kazutaka
The co_recv coroutine has two things that will try to enter it: 1. The select(2) read callback on the sheepdog socket. 2. The aio_add_request() blocking operations, including a coroutine mutex. This patch fixes it by setting NULL to co_recv before sending data. In future, we should make the sheepdog driver fully coroutine-based and simplify request handling. Signed-off-by: MORITA Kazutaka <morita.kazutaka@lab.ntt.co.jp> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-01-13prepare for future GPLv2+ relicensingPaolo Bonzini
All files under GPLv2 will get GPLv2+ changes starting tomorrow. event_notifier.c and exec-obsolete.h were only ever touched by Red Hat employees and can be relicensed now. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2011-12-22move corking functions to osdep.cPaolo Bonzini
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2011-12-22sheepdog: move coroutine send/recv function to generic codePaolo Bonzini
Outside coroutines, avoid busy waiting on EAGAIN by temporarily making the socket blocking. The API of qemu_recvv/qemu_sendv is slightly different from do_readv/do_writev because they do not handle coroutines. It returns the number of bytes written before encountering an EAGAIN. The specificity of yielding on EAGAIN is entirely in qemu-coroutine.c. Reviewed-by: MORITA Kazutaka <morita.kazutaka@lab.ntt.co.jp> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2011-12-05block: Add coroutine_fn marker to coroutine functionsDong Xu Wang
Looks better when reviewing these source files. 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>
2011-11-22sheepdog: Avoid deadlock in error pathDong Xu Wang
s->lock should be unlocked before leaving add_aio_request. Signed-off-by: Dong Xu Wang <wdongxu@linux.vnet.ibm.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2011-10-21sheepdog: add coroutine_fn markersPaolo Bonzini
This makes the following patch easier to review. Cc: MORITA Kazutaka <morita.kazutaka@lab.ntt.co.jp> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2011-10-14sheepdog: correct spellingDong Xu Wang
Reviewed-by: Andreas Färber <afaerber@suse.de> Signed-off-by: Dong Xu Wang <wdongxu@linux.vnet.ibm.com> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2011-08-24sheepdog: use coroutinesMORITA Kazutaka
This makes the sheepdog block driver support bdrv_co_readv/writev instead of bdrv_aio_readv/writev. With this patch, Sheepdog network I/O becomes fully asynchronous. The block driver yields back when send/recv returns EAGAIN, and is resumed when the sheepdog network connection is ready for the operation. Signed-off-by: MORITA Kazutaka <morita.kazutaka@lab.ntt.co.jp> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2011-08-20Use glib memory allocation and free functionsAnthony Liguori
qemu_malloc/qemu_free no longer exist after this commit. Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2011-07-25Wrap recv to avoid warningsBlue Swirl
Avoid warnings like these by wrapping recv(): CC slirp/ip_icmp.o /src/qemu/slirp/ip_icmp.c: In function 'icmp_receive': /src/qemu/slirp/ip_icmp.c:418:5: error: passing argument 2 of 'recv' from incompatible pointer type [-Werror] /usr/local/lib/gcc/i686-mingw32msvc/4.6.0/../../../../i686-mingw32msvc/include/winsock2.h:547:32: note: expected 'char *' but argument is of type 'struct icmp *' Remove also casts used to avoid warnings. Reviewed-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2011-07-18sheepdog: add full data preallocation supportMORITA Kazutaka
This introduces qemu-img create option for sheepdog which allows the data to be fully preallocated (note that sheepdog always preallocates metadata). The option is disabled by default and you need to enable it like the following: qemu-img create sheepdog:test -o preallocation=full 1G Signed-off-by: MORITA Kazutaka <morita.kazutaka@lab.ntt.co.jp> Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2011-06-24Strip trailing '\n' from error_report()'s first argumentMarkus Armbruster
error_report() prepends location, and appends a newline. The message constructed from the arguments should not contain a newline. Fix the obvious offenders. Signed-off-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2011-06-24sheepdog: qemu_bh_new() can't return null pointer, drop checkMarkus Armbruster
Signed-off-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2011-05-06Fix typo in code and commentsStefan Weil
Replace writeable -> writable Signed-off-by: Stefan Weil <weil@mail.berlios.de> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2011-04-01get rid of private bitmap functions in block/sheepdog.c, use generic onesMichael Tokarev
qemu now has generic bitmap functions, so don't redefine them in sheepdog.c, use common header instead. A small cleanup. Here's only one function which is actually used in sheepdog and gets replaced with a generic one (simplified): - static inline int test_bit(int nr, const volatile unsigned long *addr) + static inline int test_bit(int nr, const unsigned long *addr) { - return ((1UL << (nr % BITS_PER_LONG)) & ((unsigned long*)addr)[nr / BITS_PER_LONG])) != 0; + return 1UL & (addr[nr / BITS_PER_LONG] >> (nr & (BITS_PER_LONG-1))); } The body is equivalent, but the argument is not: there's "volatile" in there. Why it is used for - I'm not sure. Signed-off-by: Michael Tokarev <mjt@tls.msk.ru> Acked-by: MORITA Kazutaka <morita.kazutaka@lab.ntt.co.jp> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2011-01-31sheepdog: support creating images on remote hostsMORITA Kazutaka
This patch parses the input filename in sd_create(), and enables us specifying a target server to create sheepdog images. Signed-off-by: MORITA Kazutaka <morita.kazutaka@lab.ntt.co.jp> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2010-08-30sheepdog: remove unnecessary includesIzumi Tsutsui
"qemu_socket.h" includes all necessary files and including <netinet/tcp.h> without <netinet/in.h> could cause errors on some systems. Signed-off-by: Izumi Tsutsui <tsutsui@ceres.dti.ne.jp> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2010-07-07sheepdog: fix compile error on systems without TCP_CORKMORITA Kazutaka
WIN32 is not only the system which doesn't have TCP_CORK (e.g. OS X). Signed-off-by: MORITA Kazutaka <morita.kazutaka@lab.ntt.co.jp> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2010-07-06block: add sheepdog driver for distributed storage supportMORITA Kazutaka
Sheepdog is a distributed storage system for QEMU. It provides highly available block level storage volumes to VMs like Amazon EBS. This patch adds a qemu block driver for Sheepdog. Sheepdog features are: - No node in the cluster is special (no metadata node, no control node, etc) - Linear scalability in performance and capacity - No single point of failure - Autonomous management (zero configuration) - Useful volume management support such as snapshot and cloning - Thin provisioning - Autonomous load balancing The more details are available at the project site: http://www.osrg.net/sheepdog/ Signed-off-by: MORITA Kazutaka <morita.kazutaka@lab.ntt.co.jp> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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