tree 75ad369e9c035a73f97abf0a7ad99982e51a0079
parent 560156cb25fcb423969543d8bc93fe95eedc6b4c
author Naohiro Aota <naohiro.aota@wdc.com> 1582602973 +0900
committer David Sterba <dsterba@suse.com> 1584979309 +0100

btrfs: factor out decide_stripe_size()

Factor out decide_stripe_size() from __btrfs_alloc_chunk(). This
function calculates the actual stripe size to allocate.
decide_stripe_size() handles the common case to round down the 'ndevs'
to 'devs_increment' and check the upper and lower limitation of 'ndevs'.
decide_stripe_size_regular() decides the size of a stripe and the size
of a chunk. The policy is to maximize the number of stripes.

This commit has no functional changes.

Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Naohiro Aota <naohiro.aota@wdc.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>