From: Yan, Zheng <zheng.z.yan@intel.com>
Date: Sat, 8 Mar 2014 01:51:45 +0000 (+0800)
Subject: ceph: make sure write caps are registered with auth MDS
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=a255060451dcb416c8097218b40d86d613d84bfc;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

ceph: make sure write caps are registered with auth MDS

Only auth MDS can issue write caps to clients, so don't consider
write caps registered with non-auth MDS as valid.

Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com>
---

diff --git a/fs/ceph/caps.c b/fs/ceph/caps.c
index 17543383545c..d9ef44e5474e 100644
--- a/fs/ceph/caps.c
+++ b/fs/ceph/caps.c
@@ -885,7 +885,10 @@ int __ceph_caps_mds_wanted(struct ceph_inode_info *ci)
 		cap = rb_entry(p, struct ceph_cap, ci_node);
 		if (!__cap_is_valid(cap))
 			continue;
-		mds_wanted |= cap->mds_wanted;
+		if (cap == ci->i_auth_cap)
+			mds_wanted |= cap->mds_wanted;
+		else
+			mds_wanted |= (cap->mds_wanted & ~CEPH_CAP_ANY_FILE_WR);
 	}
 	return mds_wanted;
 }