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From 07ae526af10de814d174189ff41709cf781ace9c Mon Sep 17 00:00:00 2001
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From: Raghavendra Gowdappa <rgowdapp@redhat.com>
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Date: Tue, 30 Oct 2018 12:15:35 +0530
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Subject: [PATCH 439/444] cluster/dht: fixes to unlinking invalid linkto file
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If unlinking of an invalid linkto file failed in lookup-everywhere
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codepath, lookup was failed with EIO. The rational as per the comment
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was,
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<snip>
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/* When dht_lookup_everywhere is performed, one cached
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*and one hashed file was found and hashed file does
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*not point to the above mentioned cached node. So it
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*was considered as stale and an unlink was performed.
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*But unlink fails. So may be rebalance is in progress.
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*now ideally we have two data-files. One obtained during
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*lookup_everywhere and one where unlink-failed. So
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*at this point in time we cannot decide which one to
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*choose because there are chances of first cached
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*file is truncated after rebalance and if it is chosen
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*as cached node, application will fail. So return EIO.
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*/
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</snip>
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However, this reasoning is only valid when
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* op_errno is EBUSY, indicating rebalance is in progress
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* op_errno is ENOTCONN as wecannot determine what was the status of
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file on brick.
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Hence this patch doesn't fail lookup unless unlink fails with an
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either EBUSY or ENOTCONN
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>Change-Id: Ife55f3d97fe557f3db05beae0c2d786df31e8e55
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>Fixes: bz#1635145
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>Signed-off-by: Raghavendra Gowdappa <rgowdapp@redhat.com>
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Change-Id: Ife55f3d97fe557f3db05beae0c2d786df31e8e55
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BUG: 1634649
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upstream patch: http://review.gluster.org/r/Ife55f3d97fe557f3db05beae0c2d786df31e8e55
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Signed-off-by: Raghavendra Gowdappa <rgowdapp@redhat.com>
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Reviewed-on: https://code.engineering.redhat.com/gerrit/155102
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Tested-by: RHGS Build Bot <nigelb@redhat.com>
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Reviewed-by: Nithya Balachandran <nbalacha@redhat.com>
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---
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xlators/cluster/dht/src/dht-common.c | 7 +++----
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1 file changed, 3 insertions(+), 4 deletions(-)
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diff --git a/xlators/cluster/dht/src/dht-common.c b/xlators/cluster/dht/src/dht-common.c
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index 0984f8f..d3a0c8b 100644
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--- a/xlators/cluster/dht/src/dht-common.c
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+++ b/xlators/cluster/dht/src/dht-common.c
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@@ -2104,10 +2104,9 @@ dht_lookup_unlink_of_false_linkto_cbk (call_frame_t *frame, void *cookie,
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this_call_cnt = dht_frame_return (frame);
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if (is_last_call (this_call_cnt)) {
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-
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- if (op_ret == 0) {
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- dht_lookup_everywhere_done (frame, this);
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- } else {
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+ if ((op_ret == 0) || ((op_errno != EBUSY) && (op_errno != ENOTCONN))) {
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+ dht_lookup_everywhere_done (frame, this);
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+ } else {
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/*When dht_lookup_everywhere is performed, one cached
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*and one hashed file was found and hashed file does
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*not point to the above mentioned cached node. So it
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--
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1.8.3.1
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