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libceph: mon_get_version request infrastructure

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Add support for mon_get_version requests to libceph.  This reuses much
of the ceph_mon_generic_request infrastructure, with one exception.
Older OSDs don't set mon_get_version reply hdr->tid even if the
original request had a non-zero tid, which makes it impossible to
lookup ceph_mon_generic_request contexts by tid in get_generic_reply()
for such replies.  As a workaround, we allocate a reply message on the
reply path.  This can probably interfere with revoke, but I don't see
a better way.

Signed-off-by: Ilya Dryomov <ilya.dryomov@inktank.com>
Reviewed-by: Sage Weil <sage@inktank.com>
This commit is contained in:
Ilya Dryomov
2014-05-13 11:19:26 +04:00
committed by Yan, Zheng
parent 002b36ba5e
commit 513a8243d6
4 changed files with 128 additions and 8 deletions
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net/ceph/debugfs.c
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@@ -129,6 +129,8 @@ static int monc_show(struct seq_file *s, void *p)
seq_printf(s, "%llu statfs\n", req->tid);
else if (op == CEPH_MSG_POOLOP)
seq_printf(s, "%llu poolop\n", req->tid);
else if (op == CEPH_MSG_MON_GET_VERSION)
seq_printf(s, "%llu mon_get_version", req->tid);
else
seq_printf(s, "%llu unknown\n", req->tid);
}