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path: root/block/gluster.c
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2013-09-12bdrv: Use "Error" for opening imagesMax Reitz1-1/+1
Add an Error ** parameter to BlockDriver.bdrv_open and BlockDriver.bdrv_file_open to allow more specific error messages. Signed-off-by: Max Reitz <mreitz@redhat.com>
2013-08-30gluster: Abort on AIO completion failureBharata B Rao1-13/+2
Currently if gluster AIO callback thread fails to notify the QEMU thread about AIO completion, we try graceful recovery by marking the disk drive as inaccessible. This error recovery code is race-prone as found by Asias and Stefan. However as found out by Paolo, this kind of error is impossible and hence simplify the code that handles this error recovery. Signed-off-by: Bharata B Rao <bharata@linux.vnet.ibm.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2013-08-19aio: drop io_flush argumentStefan Hajnoczi1-4/+3
The .io_flush() handler no longer exists and has no users. Drop the io_flush argument to aio_set_fd_handler() and related functions. The AioFlushEventNotifierHandler and AioFlushHandler typedefs are no longer used and are dropped too. Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2013-08-19block/gluster: drop qemu_gluster_aio_flush_cb()Stefan Hajnoczi1-17/+1
Since .io_flush() is no longer called we do not need qemu_gluster_aio_flush_cb() anymore. It turns out that qemu_aio_count is unused now and can be dropped. Thanks to Bharata B Rao <bharata@linux.vnet.ibm.com> for catching a build failure with CONFIG_GLUSTERFS_DISCARD, which has been fixed. Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2013-07-29gluster: Add image resize supportPaolo Bonzini1-0/+17
Implement .bdrv_truncate in GlusterFS block driver so that GlusterFS backend can support image resizing. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Bharata B Rao <bharata@linux.vnet.ibm.com> Tested-by: Bharata B Rao <bharata@linux.vnet.ibm.com> Acked-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2013-07-19gluster: Add discard support for GlusterFS block driver.Bharata B Rao1-0/+45
Implement bdrv_aio_discard for gluster. Signed-off-by: Bharata B Rao <bharata@linux.vnet.ibm.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2013-06-28gluster: Return bdrv_has_zero_init = 0Kevin Wolf1-0/+10
GlusterFS volumes can be backed by block devices, in which case bdrv_create() doesn't make sure that the image is zeroed out. It is currently not possibly to detect whether a given image is backed by a file or a block device, and incorrectly assuming that it is zeroed corrupts images during qemu-img convert, so let's err on the side of caution and always return 0. Cc: qemu-stable@nongnu.org Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2013-04-22block: Remove filename parameter from .bdrv_file_open()Kevin Wolf1-2/+2
It is unused now in all block drivers. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com>
2013-04-22gluster: Use bdrv_open options instead of filenameKevin Wolf1-1/+31
This is only to convert the internal interface that is used for passing the "filename" to be parsed, but converting to actual fine grained options is left for another day, as it doesn't look trivial. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com>
2013-03-22block: Add options QDict to bdrv_file_open() prototypesKevin Wolf1-1/+1
The new parameter is unused yet. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com>
2013-02-11error: Strip trailing '\n' from error string arguments (again)Markus Armbruster1-1/+1
Commit 6daf194d and be62a2eb got rid of a bunch, but they keep coming back. Tracked down with this Coccinelle semantic patch: @r@ expression err, eno, cls, fmt; position p; @@ ( error_report(fmt, ...)@p | error_set(err, cls, fmt, ...)@p | error_set_errno(err, eno, cls, fmt, ...)@p | error_setg(err, fmt, ...)@p | error_setg_errno(err, eno, fmt, ...)@p ) @script:python@ fmt << r.fmt; p << r.p; @@ if "\\n" in str(fmt): print "%s:%s:%s:%s" % (p[0].file, p[0].line, p[0].column, fmt) Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-id: 1360354939-10994-4-git-send-email-armbru@redhat.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2012-12-19misc: move include files to include/qemu/Paolo Bonzini1-2/+2
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-12-19block: move include files to include/block/Paolo Bonzini1-1/+1
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-11-14aio: rename AIOPool to AIOCBInfoStefan Hajnoczi1-3/+3
Now that AIOPool no longer keeps a freelist, it isn't really a "pool" anymore. Rename it to AIOCBInfo and make it const since it no longer needs to be modified. Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-09-28block: Support GlusterFS as a QEMU block backend.Bharata B Rao1-0/+624
This patch adds gluster as the new block backend in QEMU. This gives QEMU the ability to boot VM images from gluster volumes. Its already possible to boot from VM images on gluster volumes using FUSE mount, but this patchset provides the ability to boot VM images from gluster volumes by by-passing the FUSE layer in gluster. This is made possible by using libgfapi routines to perform IO on gluster volumes directly. VM Image on gluster volume is specified like this: file=gluster[+transport]://[server[:port]]/volname/image[?socket=...] 'gluster' is the protocol. 'transport' specifies the transport type used to connect to gluster management daemon (glusterd). Valid transport types are tcp, unix and rdma. If a transport type isn't specified, then tcp type is assumed. 'server' specifies the server where the volume file specification for the given volume resides. This can be either hostname, ipv4 address or ipv6 address. ipv6 address needs to be within square brackets [ ]. If transport type is 'unix', then 'server' field should not be specifed. The 'socket' field needs to be populated with the path to unix domain socket. 'port' is the port number on which glusterd is listening. This is optional and if not specified, QEMU will send 0 which will make gluster to use the default port. If the transport type is unix, then 'port' should not be specified. 'volname' is the name of the gluster volume which contains the VM image. 'image' is the path to the actual VM image that resides on gluster volume. Examples: file=gluster://1.2.3.4/testvol/a.img file=gluster+tcp://1.2.3.4/testvol/a.img file=gluster+tcp://1.2.3.4:24007/testvol/dir/a.img file=gluster+tcp://[1:2:3:4:5:6:7:8]/testvol/dir/a.img file=gluster+tcp://[1:2:3:4:5:6:7:8]:24007/testvol/dir/a.img file=gluster+tcp://server.domain.com:24007/testvol/dir/a.img file=gluster+unix:///testvol/dir/a.img?socket=/tmp/glusterd.socket file=gluster+rdma://1.2.3.4:24007/testvol/a.img Signed-off-by: Bharata B Rao <bharata@linux.vnet.ibm.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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