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authorSage Weil <sage@newdream.net>2011-01-21 21:16:46 -0800
committerSage Weil <sage@newdream.net>2011-01-25 08:16:37 -0800
commitd66bbd441c08fe00ed2add1cf70cb243ebc2b27e (patch)
treebde3d1bf8d6a665b14e2b86e82506c8c7b3b0657 /fs/ceph/mds_client.c
parent7e57b81c7688c762bc9e775bc83f9fc17946f527 (diff)
downloadop-kernel-dev-d66bbd441c08fe00ed2add1cf70cb243ebc2b27e.zip
op-kernel-dev-d66bbd441c08fe00ed2add1cf70cb243ebc2b27e.tar.gz
ceph: avoid picking MDS that is not active
Ignore replication or auth frag data if it indicates an MDS that is not active. This can happen if the MDS shuts down and the client has stale data about the namespace distribution across the MDS cluster. If that's the case, fall back to directing the request based on the auth cap (which should always be accurate). Signed-off-by: Sage Weil <sage@newdream.net>
Diffstat (limited to 'fs/ceph/mds_client.c')
-rw-r--r--fs/ceph/mds_client.c10
1 files changed, 7 insertions, 3 deletions
diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c
index 509339c..a6949cc 100644
--- a/fs/ceph/mds_client.c
+++ b/fs/ceph/mds_client.c
@@ -693,9 +693,11 @@ static int __choose_mds(struct ceph_mds_client *mdsc,
dout("choose_mds %p %llx.%llx "
"frag %u mds%d (%d/%d)\n",
inode, ceph_vinop(inode),
- frag.frag, frag.mds,
+ frag.frag, mds,
(int)r, frag.ndist);
- return mds;
+ if (ceph_mdsmap_get_state(mdsc->mdsmap, mds) >=
+ CEPH_MDS_STATE_ACTIVE)
+ return mds;
}
/* since this file/dir wasn't known to be
@@ -708,7 +710,9 @@ static int __choose_mds(struct ceph_mds_client *mdsc,
dout("choose_mds %p %llx.%llx "
"frag %u mds%d (auth)\n",
inode, ceph_vinop(inode), frag.frag, mds);
- return mds;
+ if (ceph_mdsmap_get_state(mdsc->mdsmap, mds) >=
+ CEPH_MDS_STATE_ACTIVE)
+ return mds;
}
}
}
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