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* ceph: fix num_pages_free accounting in pagelistSage Weil2010-10-201-0/+1
| | | | | | Decrement the free page counter when removing a page from the free_list. Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: don't crash when passed bad mount optionsYehuda Sadeh2010-10-201-1/+1
| | | | | | | This only happened when parse_extra_token was not passed to ceph_parse_option() (hence, only happened in rbd). Signed-off-by: Yehuda Sadeh <yehuda@hq.newdream.net>
* ceph: add pagelist_reserve, pagelist_truncate, pagelist_set_cursorGreg Farnum2010-10-201-9/+97
| | | | | | | | These facilitate preallocation of pages so that we can encode into the pagelist in an atomic context. Signed-off-by: Greg Farnum <gregf@hq.newdream.net> Signed-off-by: Sage Weil <sage@newdream.net>
* rbd: introduce rados block device (rbd), based on libcephYehuda Sadeh2010-10-201-2/+1
| | | | | | | | | | | | The rados block device (rbd), based on osdblk, creates a block device that is backed by objects stored in the Ceph distributed object storage cluster. Each device consists of a single metadata object and data striped over many data objects. The rbd driver supports read-only snapshots. Signed-off-by: Yehuda Sadeh <yehuda@hq.newdream.net> Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: factor out libceph from Ceph file systemYehuda Sadeh2010-10-2027-0/+10660
This factors out protocol and low-level storage parts of ceph into a separate libceph module living in net/ceph and include/linux/ceph. This is mostly a matter of moving files around. However, a few key pieces of the interface change as well: - ceph_client becomes ceph_fs_client and ceph_client, where the latter captures the mon and osd clients, and the fs_client gets the mds client and file system specific pieces. - Mount option parsing and debugfs setup is correspondingly broken into two pieces. - The mon client gets a generic handler callback for otherwise unknown messages (mds map, in this case). - The basic supported/required feature bits can be expanded (and are by ceph_fs_client). No functional change, aside from some subtle error handling cases that got cleaned up in the refactoring process. Signed-off-by: Sage Weil <sage@newdream.net>