Goldwyn Rodrigues 1aee41f637 Add new disk to clustered array ... Algorithm: 1. Node 1 issues mdadm --manage /dev/mdX --add /dev/sdYY which issues ioctl(ADD_NEW_DISC with disc.state set to MD_DISK_CLUSTER_ADD) 2. Node 1 sends NEWDISK with uuid and slot number 3. Other nodes issue kobject_uevent_env with uuid and slot number (Steps 4,5 could be a udev rule) 4. In userspace, the node searches for the disk, perhaps using blkid -t SUB_UUID="" 5. Other nodes issue either of the following depending on whether the disk was found: ioctl(ADD_NEW_DISK with disc.state set to MD_DISK_CANDIDATE and disc.number set to slot number) ioctl(CLUSTERED_DISK_NACK) 6. Other nodes drop lock on no-new-devs (CR) if device is found 7. Node 1 attempts EX lock on no-new-devs 8. If node 1 gets the lock, it sends METADATA_UPDATED after unmarking the disk as SpareLocal 9. If not (get no-new-dev lock), it fails the operation and sends METADATA_UPDATED 10. Other nodes understand if the device is added or not by reading the superblock again after receiving the METADATA_UPDATED message. Signed-off-by: Lidong Zhong <lzhong@suse.com> Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.com>		2015-02-23 09:59:07 -06:00
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asm-generic	vfs: renumber FMODE_NONOTIFY and add to uniqueness check	2015-01-08 15:10:52 -08:00
drm	Merge tag 'topic/drm-misc-2015-02-06' of git://anongit.freedesktop.org/drm-intel into drm-next	2015-02-11 15:33:02 +10:00
linux	Add new disk to clustered array	2015-02-23 09:59:07 -06:00
misc	cxl: Add documentation for userspace APIs	2014-10-08 20:16:19 +11:00
mtd
rdma	IB/core: Add on demand paging caps to ib_uverbs_ex_query_device	2015-02-18 08:36:26 -08:00
scsi
sound	ALSA: usx2y: Move UAPI definition into include/uapi/sound/usb_stream.h	2015-01-28 17:33:49 +01:00
video
xen
Kbuild	cxl: Add userspace header file	2014-10-08 20:15:57 +11:00