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authorRavishankar N <ravishankar@redhat.com>2018-05-18 15:38:29 +0530
committerShyamsundar Ranganathan <srangana@redhat.com>2018-05-25 12:57:45 +0000
commitc6f21697a52200bbbf9af05dff2b9c3ae0a99b43 (patch)
tree1da294370544647de8e53a6ab0b2264aaf93f855
parentdbe0984d8a84e0ca0e0d42f84d856c6f1d2a5134 (diff)
afr: fix bug-1363721.t failure
Problem: In the .t, when the only good brick was brought down, writes on the fd were still succeeding on the bad bricks. The inflight split-brain check was marking the write as failure but since the write succeeded on all the bad bricks, afr_txn_nothing_failed() was set to true and we were unwinding writev with success to DHT and then catching the failure in post-op in the background. Fix: Don't wind the FOP phase if the write_subvol (which is populated with readable subvols obtained in pre-op cbk) does not have at least 1 good brick which was up when the transaction started. Note: This fix is not related to brick muliplexing. I ran the .t 10 times with this fix and brick-mux enabled without any failures. Change-Id: I915c9c366aa32cd342b1565827ca2d83cb02ae85 updates: bz#1581548 Signed-off-by: Ravishankar N <ravishankar@redhat.com> (cherry picked from commit 985a1d15db910e012ddc1dcdc2e333cc28a9968b)
-rw-r--r--tests/bugs/replicate/bug-1363721.t10
-rw-r--r--xlators/cluster/afr/src/afr-common.c14
-rw-r--r--xlators/cluster/afr/src/afr-transaction.c38
-rw-r--r--xlators/cluster/afr/src/afr.h3
4 files changed, 63 insertions, 2 deletions
diff --git a/tests/bugs/replicate/bug-1363721.t b/tests/bugs/replicate/bug-1363721.t
index 580d8b0..0ed34d8 100644
--- a/tests/bugs/replicate/bug-1363721.t
+++ b/tests/bugs/replicate/bug-1363721.t
@@ -18,6 +18,10 @@ function size_increased {
fi
}
+function has_write_failed {
+ local pid=$1
+ if [ -d /proc/$pid ]; then echo "N"; else echo "Y"; fi
+}
TEST glusterd
TEST pidof glusterd
TEST $CLI volume create $V0 replica 3 $H0:$B0/${V0}{0,1,2}
@@ -67,8 +71,10 @@ sleep 3
# Now kill the second brick
kill_brick $V0 $H0 $B0/${V0}2
-# At this point the write should have been failed. But make sure that the second
-# brick is never an accused.
+# At this point the write should have been failed.
+EXPECT_WITHIN $PROCESS_DOWN_TIMEOUT "Y" has_write_failed $dd_pid
+
+# Also make sure that the second brick is never an accused.
md5sum_2=$(md5sum $B0/${V0}2/file1 | awk '{print $1}')
diff --git a/xlators/cluster/afr/src/afr-common.c b/xlators/cluster/afr/src/afr-common.c
index c313294..ad037cd 100644
--- a/xlators/cluster/afr/src/afr-common.c
+++ b/xlators/cluster/afr/src/afr-common.c
@@ -6631,6 +6631,20 @@ out:
return ret;
}
+uint64_t
+afr_write_subvol_get (call_frame_t *frame, xlator_t *this)
+{
+ afr_local_t *local = NULL;
+ uint64_t write_subvol = 0;
+
+ local = frame->local;
+ LOCK(&local->inode->lock);
+ write_subvol = local->inode_ctx->write_subvol;
+ UNLOCK (&local->inode->lock);
+
+ return write_subvol;
+}
+
int
afr_write_subvol_set (call_frame_t *frame, xlator_t *this)
{
diff --git a/xlators/cluster/afr/src/afr-transaction.c b/xlators/cluster/afr/src/afr-transaction.c
index b4d3062..9c09637 100644
--- a/xlators/cluster/afr/src/afr-transaction.c
+++ b/xlators/cluster/afr/src/afr-transaction.c
@@ -167,6 +167,34 @@ afr_changelog_has_quorum (afr_local_t *local, xlator_t *this)
return _gf_false;
}
+
+gf_boolean_t
+afr_is_write_subvol_valid (call_frame_t *frame, xlator_t *this)
+{
+ int i = 0;
+ afr_local_t *local = NULL;
+ afr_private_t *priv = NULL;
+ uint64_t write_subvol = 0;
+ unsigned char *writable = NULL;
+ uint16_t datamap = 0;
+
+ local = frame->local;
+ priv = this->private;
+ writable = alloca0 (priv->child_count);
+
+ write_subvol = afr_write_subvol_get (frame, this);
+ datamap = (write_subvol & 0x00000000ffff0000) >> 16;
+ for (i = 0; i < priv->child_count; i++) {
+ if (datamap & (1 << i))
+ writable[i] = 1;
+
+ if (writable[i] && !local->transaction.failed_subvols[i])
+ return _gf_true;
+ }
+
+ return _gf_false;
+}
+
int
afr_transaction_fop (call_frame_t *frame, xlator_t *this)
{
@@ -189,6 +217,16 @@ afr_transaction_fop (call_frame_t *frame, xlator_t *this)
afr_transaction_resume (frame, this);
return 0;
}
+
+ /* Fail if at least one writeable brick isn't up.*/
+ if (local->transaction.type == AFR_DATA_TRANSACTION &&
+ !afr_is_write_subvol_valid (frame, this)) {
+ local->op_ret = -1;
+ local->op_errno = EIO;
+ afr_transaction_resume (frame, this);
+ return 0;
+ }
+
local->call_count = call_count;
for (i = 0; i < priv->child_count; i++) {
if (local->transaction.pre_op[i] && !failed_subvols[i]) {
diff --git a/xlators/cluster/afr/src/afr.h b/xlators/cluster/afr/src/afr.h
index c76b0c1..68087e0 100644
--- a/xlators/cluster/afr/src/afr.h
+++ b/xlators/cluster/afr/src/afr.h
@@ -1218,6 +1218,9 @@ afr_is_symmetric_error (call_frame_t *frame, xlator_t *this);
int
__afr_inode_ctx_get (xlator_t *this, inode_t *inode, afr_inode_ctx_t **ctx);
+uint64_t
+afr_write_subvol_get (call_frame_t *frame, xlator_t *this);
+
int
afr_write_subvol_set (call_frame_t *frame, xlator_t *this);