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From c429d3c63601e6ea15af76aa684c30bbeb746467 Mon Sep 17 00:00:00 2001
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From: Mohammed Rafi KC <rkavunga@redhat.com>
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Date: Tue, 23 Apr 2019 13:03:28 +0530
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Subject: [PATCH 120/124] glusterd/shd: Keep a ref on volinfo until attach rpc
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execute cbk
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When svc attach execute for multiplexing a daemon, we have to keep
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a ref on volinfo until it finish the execution. Because, if the attach
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is an aysnc call, then a parallel volume delete can lead to free the
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volinfo
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> upstream patch : https://review.gluster.org/#/c/glusterfs/+/22606/
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>Change-Id: Ibc02b89557baaed2f63db63d7fb1a7480444ae0d
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>fixes: bz#1702185
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>Signed-off-by: Mohammed Rafi KC <rkavunga@redhat.com>
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Change-Id: Ibc02b89557baaed2f63db63d7fb1a7480444ae0d
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BUG: 1702240
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Signed-off-by: Mohammed Rafi KC <rkavunga@redhat.com>
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Reviewed-on: https://code.engineering.redhat.com/gerrit/168616
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Tested-by: RHGS Build Bot <nigelb@redhat.com>
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Reviewed-by: Atin Mukherjee <amukherj@redhat.com>
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---
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xlators/mgmt/glusterd/src/glusterd-shd-svc.c | 3 +++
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xlators/mgmt/glusterd/src/glusterd-svc-helper.c | 4 ++++
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2 files changed, 7 insertions(+)
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diff --git a/xlators/mgmt/glusterd/src/glusterd-shd-svc.c b/xlators/mgmt/glusterd/src/glusterd-shd-svc.c
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index 19eca9f..a9eab42 100644
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--- a/xlators/mgmt/glusterd/src/glusterd-shd-svc.c
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+++ b/xlators/mgmt/glusterd/src/glusterd-shd-svc.c
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@@ -452,8 +452,11 @@ glusterd_shdsvc_start(glusterd_svc_t *svc, int flags)
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}
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if (shd->attached) {
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+ glusterd_volinfo_ref(volinfo);
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+ /* Unref will happen from glusterd_svc_attach_cbk */
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ret = glusterd_attach_svc(svc, volinfo, flags);
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if (ret) {
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+ glusterd_volinfo_unref(volinfo);
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gf_msg("glusterd", GF_LOG_ERROR, 0, GD_MSG_VOLINFO_GET_FAIL,
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"Failed to attach shd svc(volume=%s) to pid=%d. Starting"
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"a new process",
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diff --git a/xlators/mgmt/glusterd/src/glusterd-svc-helper.c b/xlators/mgmt/glusterd/src/glusterd-svc-helper.c
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index 02945b1..f7be394 100644
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--- a/xlators/mgmt/glusterd/src/glusterd-svc-helper.c
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+++ b/xlators/mgmt/glusterd/src/glusterd-svc-helper.c
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@@ -695,6 +695,10 @@ out:
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if (flag) {
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GF_FREE(flag);
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}
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+
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+ if (volinfo)
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+ glusterd_volinfo_unref(volinfo);
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+
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GF_ATOMIC_DEC(conf->blockers);
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STACK_DESTROY(frame->root);
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return 0;
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--
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1.8.3.1
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