From: Alex Elder <elder@inktank.com>
Date: Tue, 3 Jul 2012 21:01:19 +0000 (-0500)
Subject: rbd: increase maximum snapshot name length
X-Git-Tag: v3.8-rc1~21^2~51
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d4b125e9eb43babd14538ba61718e3db71a98d29;p=pandora-kernel.git

rbd: increase maximum snapshot name length

Change RBD_MAX_SNAP_NAME_LEN to be based on NAME_MAX.  That is a
practical limit for the length of a snapshot name (based on the
presence of a directory using the name under /sys/bus/rbd to
represent the snapshot).

The /sys entry is created by prefixing it with "snap_"; define that
prefix symbolically, and take its length into account in defining
the snapshot name length limit.

Enforce the limit in rbd_add_parse_args().  Also delete a dout()
call in that function that was not meant to be committed.

Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Dan Mick <dan.mick@inktank.com>
Reviewed-by: Josh Durgin <josh.durgin@inktank.com>
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