From: Ilya Dryomov <idryomov@redhat.com>
Date: Tue, 4 Nov 2014 15:32:14 +0000 (+0300)
Subject: libceph: unlink from o_linger_requests when clearing r_osd
X-Git-Tag: omap-for-v3.19/fixes-for-merge-window~121^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a390de0208e7f2f8fdb2fbf970240e4f7b308037;p=pandora-kernel.git

libceph: unlink from o_linger_requests when clearing r_osd

Requests have to be unlinked from both osd->o_requests (normal
requests) and osd->o_linger_requests (linger requests) lists when
clearing req->r_osd.  Otherwise __unregister_linger_request() gets
confused and we trip over a !list_empty(&osd->o_linger_requests)
assert in __remove_osd().

MON=1 OSD=1:

    # cat remove-osd.sh
    #!/bin/bash
    rbd create --size 1 test
    DEV=$(rbd map test)
    ceph osd out 0
    sleep 3
    rbd map dne/dne # obtain a new osdmap as a side effect
    rbd unmap $DEV & # will block
    sleep 3
    ceph osd in 0

Signed-off-by: Ilya Dryomov <idryomov@redhat.com>
Reviewed-by: Alex Elder <elder@linaro.org>
---

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