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Support resize is a little complex for clustered raid, since we need to ensure all the nodes share the same knowledge about the size of raid. We achieve the goal by check the sync_size which is in each node's bitmap, we can only change the capacity after cluster_check_sync_size returns 0. Also, get_bitmap_from_slot is added to get a slot's bitmap. And we exported some funcs since they are used in cluster_check_sync_size(). We can also reuse get_bitmap_from_slot to remove redundant code existed in bitmap_copy_from_slot. Reviewed-by: NeilBrown <neilb@suse.com> Signed-off-by: Guoqing Jiang <gqjiang@suse.com> Signed-off-by: Shaohua Li <shli@fb.com>
Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. Please read the Documentation/process/changes.rst file, as it contains the requirements for building and running the kernel, and information about the problems which may result by upgrading your kernel.