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2011-09-20rbd: allow escaping in config stringSage Weil1-2/+27
The config string is variously delimited by =, @, and /, depending on the field. Allow these characters to be escaped by preceeding them with \. Signed-off-by: Sage Weil <sage@newdream.net> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2011-09-20rbd: call flush, if availableSage Weil1-0/+12
librbd recently added async writeback and flush support. If the new rbd_flush() call is available, call it. Signed-off-by: Sage Weil <sage@newdream.net> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2011-09-20rbd: update comment headingSage Weil1-15/+13
Properly document the configuration string syntax and semantics. Remove (out of date) details about the librbd implementation. Signed-off-by: Sage Weil <sage@newdream.net> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2011-09-20rbd: ignore failures when reading from default conf locationSage Weil1-10/+4
If we are reading from the default config location, ignore any failures. It is perfectly legal for the user to specify exactly the options they need and to not rely on any config file. Signed-off-by: Sage Weil <sage@newdream.net> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2011-09-12rbd: fix leak in qemu_rbd_open failure pathsSage Weil1-15/+13
Fix leak of s->snap in failure path. Simplify error paths for the whole function. Reported-by: Stefan Hajnoczi <stefanha@gmail.com> Signed-off-by: Sage Weil <sage@newdream.net> Reviewed-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2011-09-12rbd: clean up, fix styleSage Weil1-9/+8
No assignment in condition. Remove duplicate ret > 0 check. Signed-off-by: Sage Weil <sage@newdream.net> Reviewed-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2011-09-12rbd: allow client id to be specified in config stringSage Weil1-8/+44
Allow the client id to be specified in the config string via 'id=' so that users can control who they authenticate as. Currently they are stuck with the default ('admin'). This is necessary for anyone using authentication in their environment. Signed-off-by: Sage Weil <sage@newdream.net> Reviewed-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2011-08-20Use glib memory allocation and free functionsAnthony Liguori1-13/+13
qemu_malloc/qemu_free no longer exist after this commit. Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2011-06-14block/rbd: Remove unused local variableStefan Weil1-4/+0
Variable 'snap' is assigned a value that is never used. Remove snap and the related code. Cc: Christian Brunner <chb@muc.de> Cc: Josh Durgin <josh.durgin@dreamhost.com> Cc: Kevin Wolf <kwolf@redhat.com> Signed-off-by: Stefan Weil <weil@mail.berlios.de> Reviewed-by: Josh Durgin <josh.durgin@dreamhost.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2011-06-08rbd: Add bdrv_truncate implementationJosh Durgin1-0/+14
Reviewed-by: Christian Brunner <chb@muc.de> Signed-off-by: Josh Durgin <josh.durgin@dreamhost.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2011-06-08rbd: check return values when scheduling aioJosh Durgin1-4/+20
If scheduling fails, the number of outstanding I/Os must be correct, or there will be a hang when waiting for everything to be flushed. Reviewed-by: Christian Brunner <chb@muc.de> Reported-by: Stefan Hajnoczi <stefanha@gmail.com> Signed-off-by: Josh Durgin <josh.durgin@dreamhost.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2011-06-08rbd: allow configuration of rados from the rbd filenameJosh Durgin1-17/+102
The new format is rbd:pool/image[@snapshot][:option1=value1[:option2=value2...]] Each option is used to configure rados, and may be any Ceph option, or "conf". The "conf" option specifies a Ceph configuration file to read. This allows rbd volumes from more than one Ceph cluster to be used by specifying different monitor addresses, as well as having different logging levels or locations for different volumes. Reviewed-by: Christian Brunner <chb@muc.de> Signed-off-by: Josh Durgin <josh.durgin@dreamhost.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2011-06-08rbd: use the higher level librbd instead of just libradosJosh Durgin1-577/+218
librbd stacks on top of librados to provide access to rbd images. Using librbd simplifies the qemu code, and allows qemu to use new versions of the rbd format with few (if any) changes. Reviewed-by: Christian Brunner <chb@muc.de> Signed-off-by: Josh Durgin <josh.durgin@dreamhost.com> Signed-off-by: Yehuda Sadeh <yehuda@hq.newdream.net> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2010-12-14ceph/rbd block driver for qemu-kvmChristian Brunner1-0/+1059
RBD is an block driver for the distributed file system Ceph (http://ceph.newdream.net/). This driver uses librados (which is part of the Ceph server) for direct access to the Ceph object store and is running entirely in userspace (Yehuda also wrote a driver for the linux kernel, that can be used to access rbd volumes as a block device). Signed-off-by: Yehuda Sadeh <yehuda@hq.newdream.net> Signed-off-by: Christian Brunner <chb@muc.de> Reviewed-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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