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glusterfs/0410-afr-prevent-spurious-entry-heals-leading-to-gfid-spl.patch
Rinku Kothiya 14e44be7b0 autobuild v6.0-38 
Resolves: bz#1234220 bz#1286171 bz#1487177 bz#1524457 bz#1640573
Resolves: bz#1663557 bz#1667954 bz#1683602 bz#1686897 bz#1721355
Resolves: bz#1748865 bz#1750211 bz#1754391 bz#1759875 bz#1761531
Resolves: bz#1761932 bz#1763124 bz#1763129 bz#1764091 bz#1775637
Resolves: bz#1776901 bz#1781550 bz#1781649 bz#1781710 bz#1783232
Resolves: bz#1784211 bz#1784415 bz#1786516 bz#1786681 bz#1787294
Resolves: bz#1787310 bz#1787331 bz#1787994 bz#1790336 bz#1792873
Resolves: bz#1794663 bz#1796814 bz#1804164 bz#1810924 bz#1815434
Resolves: bz#1836099 bz#1837467 bz#1837926 bz#1838479 bz#1839137
Resolves: bz#1844359
Signed-off-by: Rinku Kothiya <rkothiya@redhat.com>
2020-06-10 00:48:36 -04:00

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From 2b2eb846c49caba13ab92ec66af20292e7780fc1 Mon Sep 17 00:00:00 2001
From: Ravishankar N <ravishankar@redhat.com>
Date: Tue, 11 Feb 2020 14:34:48 +0530
Subject: [PATCH 410/449] afr: prevent spurious entry heals leading to gfid
split-brain
Problem:
In a hyperconverged setup with granular-entry-heal enabled, if a file is
recreated while one of the bricks is down, and an index heal is triggered
(with the brick still down), entry-self heal was doing a spurious heal
with just the 2 good bricks. It was doing a post-op leading to removal
of the filename from .glusterfs/indices/entry-changes as well as
erroneous setting of afr xattrs on the parent. When the brick came up,
the xattrs were cleared, resulting in the renamed file not getting
healed and leading to gfid split-brain and EIO on the mount.
Fix:
Proceed with entry heal only when shd can connect to all bricks of the replica,
just like in data and metadata heal.
BUG: 1804164
> Upstream patch:https://review.gluster.org/#/c/glusterfs/+/24109/
> fixes: bz#1801624
> Change-Id: I916ae26ad1fabf259bc6362da52d433b7223b17e
> Signed-off-by: Ravishankar N <ravishankar@redhat.com>
Change-Id: I23f57e543cff1e3f35eb8dbc60a2babfae6838c7
Signed-off-by: Ravishankar N <ravishankar@redhat.com>
Reviewed-on: https://code.engineering.redhat.com/gerrit/202395
Tested-by: RHGS Build Bot <nigelb@redhat.com>
Reviewed-by: Sunil Kumar Heggodu Gopala Acharya <sheggodu@redhat.com>
---
.../bug-1433571-undo-pending-only-on-up-bricks.t | 18 ++-----
tests/bugs/replicate/bug-1801624-entry-heal.t | 58 ++++++++++++++++++++++
xlators/cluster/afr/src/afr-common.c | 4 +-
xlators/cluster/afr/src/afr-self-heal-common.c | 8 +--
xlators/cluster/afr/src/afr-self-heal-entry.c | 6 +--
xlators/cluster/afr/src/afr-self-heal-name.c | 2 +-
xlators/cluster/afr/src/afr-self-heal.h | 2 -
7 files changed, 69 insertions(+), 29 deletions(-)
create mode 100644 tests/bugs/replicate/bug-1801624-entry-heal.t
diff --git a/tests/bugs/replicate/bug-1433571-undo-pending-only-on-up-bricks.t b/tests/bugs/replicate/bug-1433571-undo-pending-only-on-up-bricks.t
index 0767f47..10ce013 100644
--- a/tests/bugs/replicate/bug-1433571-undo-pending-only-on-up-bricks.t
+++ b/tests/bugs/replicate/bug-1433571-undo-pending-only-on-up-bricks.t
@@ -49,25 +49,15 @@ TEST $CLI volume start $V0 force
EXPECT_WITHIN $CHILD_UP_TIMEOUT "1" afr_child_up_status $V0 0
EXPECT_WITHIN $CHILD_UP_TIMEOUT "1" afr_child_up_status $V0 2
-#Kill brick 0 and turn on the client side heal and do ls to trigger the heal.
-#The pending xattrs on bricks 1 & 2 should have pending entry on brick 0.
-TEST kill_brick $V0 $H0 $B0/${V0}0
+# We were killing one brick and checking that entry heal does not reset the
+# pending xattrs for the down brick. Now that we need all bricks to be up for
+# entry heal, I'm removing that test from the .t
+
TEST $CLI volume set $V0 cluster.data-self-heal on
TEST $CLI volume set $V0 cluster.metadata-self-heal on
TEST $CLI volume set $V0 cluster.entry-self-heal on
TEST ls $M0
-EXPECT "000000000000000000000001" get_hex_xattr trusted.afr.$V0-client-0 $B0/${V0}1
-EXPECT "000000000000000000000001" get_hex_xattr trusted.afr.$V0-client-0 $B0/${V0}2
-EXPECT_WITHIN $HEAL_TIMEOUT "000000000000000000000000" get_hex_xattr trusted.afr.$V0-client-2 $B0/${V0}1
-EXPECT_WITHIN $HEAL_TIMEOUT "000000000000000000000000" get_hex_xattr trusted.afr.$V0-client-1 $B0/${V0}2
-
-#Bring back all the bricks and trigger the heal again by doing ls. Now the
-#pending xattrs on all the bricks should be 0.
-TEST $CLI volume start $V0 force
-EXPECT_WITHIN $CHILD_UP_TIMEOUT "1" afr_child_up_status $V0 0
-TEST ls $M0
-
TEST cat $M0/f1
TEST cat $M0/f2
TEST cat $M0/f3
diff --git a/tests/bugs/replicate/bug-1801624-entry-heal.t b/tests/bugs/replicate/bug-1801624-entry-heal.t
new file mode 100644
index 0000000..94b4651
--- /dev/null
+++ b/tests/bugs/replicate/bug-1801624-entry-heal.t
@@ -0,0 +1,58 @@
+#!/bin/bash
+
+. $(dirname $0)/../../include.rc
+. $(dirname $0)/../../volume.rc
+cleanup;
+
+TEST glusterd
+TEST pidof glusterd
+TEST $CLI volume create $V0 replica 3 $H0:$B0/brick{0,1,2}
+TEST $CLI volume set $V0 heal-timeout 5
+TEST $CLI volume start $V0
+EXPECT_WITHIN $CHILD_UP_TIMEOUT "1" afr_child_up_status_in_shd $V0 0
+EXPECT_WITHIN $CHILD_UP_TIMEOUT "1" afr_child_up_status_in_shd $V0 1
+EXPECT_WITHIN $CHILD_UP_TIMEOUT "1" afr_child_up_status_in_shd $V0 2
+TEST $CLI volume heal $V0 granular-entry-heal enable
+
+TEST glusterfs --volfile-id=/$V0 --volfile-server=$H0 $M0 --attribute-timeout=0 --entry-timeout=0
+EXPECT_WITHIN $PROCESS_UP_TIMEOUT "1" afr_child_up_status $V0 0
+EXPECT_WITHIN $PROCESS_UP_TIMEOUT "1" afr_child_up_status $V0 1
+EXPECT_WITHIN $PROCESS_UP_TIMEOUT "1" afr_child_up_status $V0 2
+echo "Data">$M0/FILE
+ret=$?
+TEST [ $ret -eq 0 ]
+
+# Re-create the file when a brick is down.
+TEST kill_brick $V0 $H0 $B0/brick1
+TEST rm $M0/FILE
+echo "New Data">$M0/FILE
+ret=$?
+TEST [ $ret -eq 0 ]
+EXPECT_WITHIN $HEAL_TIMEOUT "4" get_pending_heal_count $V0
+
+# Launching index heal must not reset parent dir afr xattrs or remove granular entry indices.
+$CLI volume heal $V0 # CLI will fail but heal is launched anyway.
+TEST sleep 5 # give index heal a chance to do one run.
+brick0_pending=$(get_hex_xattr trusted.afr.$V0-client-1 $B0/brick0/)
+brick2_pending=$(get_hex_xattr trusted.afr.$V0-client-1 $B0/brick2/)
+TEST [ $brick0_pending -eq "000000000000000000000002" ]
+TEST [ $brick2_pending -eq "000000000000000000000002" ]
+EXPECT "FILE" ls $B0/brick0/.glusterfs/indices/entry-changes/00000000-0000-0000-0000-000000000001/
+EXPECT "FILE" ls $B0/brick2/.glusterfs/indices/entry-changes/00000000-0000-0000-0000-000000000001/
+
+TEST $CLI volume start $V0 force
+EXPECT_WITHIN $PROCESS_UP_TIMEOUT "1" brick_up_status $V0 $H0 $B0/brick1
+EXPECT_WITHIN $CHILD_UP_TIMEOUT "1" afr_child_up_status_in_shd $V0 1
+$CLI volume heal $V0
+EXPECT_WITHIN $HEAL_TIMEOUT "0" get_pending_heal_count $V0
+
+# No gfid-split-brain (i.e. EIO) must be seen. Try on fresh mount to avoid cached values.
+EXPECT_WITHIN $UMOUNT_TIMEOUT "Y" force_umount $M0
+TEST glusterfs --volfile-id=/$V0 --volfile-server=$H0 $M0 --attribute-timeout=0 --entry-timeout=0
+EXPECT_WITHIN $PROCESS_UP_TIMEOUT "1" afr_child_up_status $V0 0
+EXPECT_WITHIN $PROCESS_UP_TIMEOUT "1" afr_child_up_status $V0 1
+EXPECT_WITHIN $PROCESS_UP_TIMEOUT "1" afr_child_up_status $V0 2
+TEST cat $M0/FILE
+
+EXPECT_WITHIN $UMOUNT_TIMEOUT "Y" force_umount $M0
+cleanup;
diff --git a/xlators/cluster/afr/src/afr-common.c b/xlators/cluster/afr/src/afr-common.c
index 32127c6..5806556 100644
--- a/xlators/cluster/afr/src/afr-common.c
+++ b/xlators/cluster/afr/src/afr-common.c
@@ -6629,7 +6629,7 @@ afr_fav_child_reset_sink_xattrs(void *opaque)
ret = afr_selfheal_inodelk(heal_frame, this, inode, this->name, 0, 0,
locked_on);
{
- if (ret < AFR_SH_MIN_PARTICIPANTS)
+ if (ret < priv->child_count)
goto data_unlock;
ret = __afr_selfheal_data_prepare(
heal_frame, this, inode, locked_on, sources, sinks,
@@ -6646,7 +6646,7 @@ afr_fav_child_reset_sink_xattrs(void *opaque)
ret = afr_selfheal_inodelk(heal_frame, this, inode, this->name,
LLONG_MAX - 1, 0, locked_on);
{
- if (ret < AFR_SH_MIN_PARTICIPANTS)
+ if (ret < priv->child_count)
goto mdata_unlock;
ret = __afr_selfheal_metadata_prepare(
heal_frame, this, inode, locked_on, sources, sinks,
diff --git a/xlators/cluster/afr/src/afr-self-heal-common.c b/xlators/cluster/afr/src/afr-self-heal-common.c
index 81ef38a..ce1ea50 100644
--- a/xlators/cluster/afr/src/afr-self-heal-common.c
+++ b/xlators/cluster/afr/src/afr-self-heal-common.c
@@ -1575,7 +1575,6 @@ afr_selfheal_find_direction(call_frame_t *frame, xlator_t *this,
char *accused = NULL; /* Accused others without any self-accusal */
char *pending = NULL; /* Have pending operations on others */
char *self_accused = NULL; /* Accused itself */
- int min_participants = -1;
priv = this->private;
@@ -1599,12 +1598,7 @@ afr_selfheal_find_direction(call_frame_t *frame, xlator_t *this,
}
}
- if (type == AFR_DATA_TRANSACTION || type == AFR_METADATA_TRANSACTION) {
- min_participants = priv->child_count;
- } else {
- min_participants = AFR_SH_MIN_PARTICIPANTS;
- }
- if (afr_success_count(replies, priv->child_count) < min_participants) {
+ if (afr_success_count(replies, priv->child_count) < priv->child_count) {
/* Treat this just like locks not being acquired */
return -ENOTCONN;
}
diff --git a/xlators/cluster/afr/src/afr-self-heal-entry.c b/xlators/cluster/afr/src/afr-self-heal-entry.c
index 3ce882e..40be898 100644
--- a/xlators/cluster/afr/src/afr-self-heal-entry.c
+++ b/xlators/cluster/afr/src/afr-self-heal-entry.c
@@ -597,7 +597,7 @@ afr_selfheal_entry_dirent(call_frame_t *frame, xlator_t *this, fd_t *fd,
ret = afr_selfheal_entrylk(frame, this, fd->inode, this->name, NULL,
locked_on);
{
- if (ret < AFR_SH_MIN_PARTICIPANTS) {
+ if (ret < priv->child_count) {
gf_msg_debug(this->name, 0,
"%s: Skipping "
"entry self-heal as only %d sub-volumes "
@@ -991,7 +991,7 @@ __afr_selfheal_entry(call_frame_t *frame, xlator_t *this, fd_t *fd,
ret = afr_selfheal_entrylk(frame, this, fd->inode, this->name, NULL,
data_lock);
{
- if (ret < AFR_SH_MIN_PARTICIPANTS) {
+ if (ret < priv->child_count) {
gf_msg_debug(this->name, 0,
"%s: Skipping "
"entry self-heal as only %d sub-volumes could "
@@ -1115,7 +1115,7 @@ afr_selfheal_entry(call_frame_t *frame, xlator_t *this, inode_t *inode)
ret = afr_selfheal_tie_breaker_entrylk(frame, this, inode, priv->sh_domain,
NULL, locked_on);
{
- if (ret < AFR_SH_MIN_PARTICIPANTS) {
+ if (ret < priv->child_count) {
gf_msg_debug(this->name, 0,
"%s: Skipping "
"entry self-heal as only %d sub-volumes could "
diff --git a/xlators/cluster/afr/src/afr-self-heal-name.c b/xlators/cluster/afr/src/afr-self-heal-name.c
index 36640b5..7d4f208 100644
--- a/xlators/cluster/afr/src/afr-self-heal-name.c
+++ b/xlators/cluster/afr/src/afr-self-heal-name.c
@@ -514,7 +514,7 @@ afr_selfheal_name_do(call_frame_t *frame, xlator_t *this, inode_t *parent,
ret = afr_selfheal_entrylk(frame, this, parent, this->name, bname,
locked_on);
{
- if (ret < AFR_SH_MIN_PARTICIPANTS) {
+ if (ret < priv->child_count) {
ret = -ENOTCONN;
goto unlock;
}
diff --git a/xlators/cluster/afr/src/afr-self-heal.h b/xlators/cluster/afr/src/afr-self-heal.h
index 6555ec5..8234cec 100644
--- a/xlators/cluster/afr/src/afr-self-heal.h
+++ b/xlators/cluster/afr/src/afr-self-heal.h
@@ -11,8 +11,6 @@
#ifndef _AFR_SELFHEAL_H
#define _AFR_SELFHEAL_H
-#define AFR_SH_MIN_PARTICIPANTS 2
-
/* Perform fop on all UP subvolumes and wait for all callbacks to return */
#define AFR_ONALL(frame, rfn, fop, args...) \
--
1.8.3.1
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