From: Alex Elder <elder@inktank.com>
Date: Sat, 14 Jul 2012 01:35:11 +0000 (-0500)
Subject: ceph: define snap counts as u32 everywhere
X-Git-Tag: v3.6-rc1~36^2~33
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=aa711ee3402ad10ffd5b70ce0417fadc9a95cccf;p=pandora-kernel.git

ceph: define snap counts as u32 everywhere

There are two structures in which a count of snapshots are
maintained:

    struct ceph_snap_context {
	...
        u32 num_snaps;
	...
    }
and
    struct ceph_snap_realm {
	...
        u32 num_prior_parent_snaps;   /*  had prior to parent_since */
	...
        u32 num_snaps;
	...
    }

These fields never take on negative values (e.g., to hold special
meaning), and so are really inherently unsigned.  Furthermore they
take their value from over-the-wire or on-disk formatted 32-bit
values.

So change their definition to have type u32, and change some spots
elsewhere in the code to account for this change.

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

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