From fd1c26ba129b069d9f73afaefdbe53683de3814a Mon Sep 17 00:00:00 2001
From: Logan Gunthorpe <logang@deltatee.com>
Date: Wed, 22 Jun 2022 14:25:19 -0600
Subject: [PATCH 6/6] tests: Add broken files for all broken tests

Each broken file contains the rough frequency of brokeness as well
as a brief explanation of what happens when it breaks. Estimates
of failure rates are not statistically significant and can vary
run to run.

This is really just a view from my window. Tests were done on a
small VM with the default loop devices, not real hardware. We've
seen different kernel configurations can cause bugs to appear as well
(ie. different block schedulers). It may also be that different race
conditions will be seen on machines with different performance
characteristics.

These annotations were done with the kernel currently in md/md-next:

 facef3b96c5b ("md: Notify sysfs sync_completed in md_reap_sync_thread()")

Signed-off-by: Logan Gunthorpe <logang@deltatee.com>
Signed-off-by: Jes Sorensen <jes@trained-monkey.org>

Upstream-Status: Backport

Reference to upstream patch:
https://git.kernel.org/pub/scm/utils/mdadm/mdadm.git/commit/?id=daa86d663476

Signed-off-by: Ovidiu Panait <ovidiu.panait@windriver.com>
---
 tests/01r5integ.broken                     |  7 ++++
 tests/01raid6integ.broken                  |  7 ++++
 tests/04r5swap.broken                      |  7 ++++
 tests/07autoassemble.broken                |  8 ++++
 tests/07autodetect.broken                  |  5 +++
 tests/07changelevelintr.broken             |  9 +++++
 tests/07changelevels.broken                |  9 +++++
 tests/07reshape5intr.broken                | 45 ++++++++++++++++++++++
 tests/07revert-grow.broken                 | 31 +++++++++++++++
 tests/07revert-shrink.broken               |  9 +++++
 tests/07testreshape5.broken                | 12 ++++++
 tests/09imsm-assemble.broken               |  6 +++
 tests/09imsm-create-fail-rebuild.broken    |  5 +++
 tests/09imsm-overlap.broken                |  7 ++++
 tests/10ddf-assemble-missing.broken        |  6 +++
 tests/10ddf-fail-create-race.broken        |  7 ++++
 tests/10ddf-fail-two-spares.broken         |  5 +++
 tests/10ddf-incremental-wrong-order.broken |  9 +++++
 tests/14imsm-r1_2d-grow-r1_3d.broken       |  5 +++
 tests/14imsm-r1_2d-takeover-r0_2d.broken   |  6 +++
 tests/18imsm-r10_4d-takeover-r0_2d.broken  |  5 +++
 tests/18imsm-r1_2d-takeover-r0_1d.broken   |  6 +++
 tests/19raid6auto-repair.broken            |  5 +++
 tests/19raid6repair.broken                 |  5 +++
 24 files changed, 226 insertions(+)
 create mode 100644 tests/01r5integ.broken
 create mode 100644 tests/01raid6integ.broken
 create mode 100644 tests/04r5swap.broken
 create mode 100644 tests/07autoassemble.broken
 create mode 100644 tests/07autodetect.broken
 create mode 100644 tests/07changelevelintr.broken
 create mode 100644 tests/07changelevels.broken
 create mode 100644 tests/07reshape5intr.broken
 create mode 100644 tests/07revert-grow.broken
 create mode 100644 tests/07revert-shrink.broken
 create mode 100644 tests/07testreshape5.broken
 create mode 100644 tests/09imsm-assemble.broken
 create mode 100644 tests/09imsm-create-fail-rebuild.broken
 create mode 100644 tests/09imsm-overlap.broken
 create mode 100644 tests/10ddf-assemble-missing.broken
 create mode 100644 tests/10ddf-fail-create-race.broken
 create mode 100644 tests/10ddf-fail-two-spares.broken
 create mode 100644 tests/10ddf-incremental-wrong-order.broken
 create mode 100644 tests/14imsm-r1_2d-grow-r1_3d.broken
 create mode 100644 tests/14imsm-r1_2d-takeover-r0_2d.broken
 create mode 100644 tests/18imsm-r10_4d-takeover-r0_2d.broken
 create mode 100644 tests/18imsm-r1_2d-takeover-r0_1d.broken
 create mode 100644 tests/19raid6auto-repair.broken
 create mode 100644 tests/19raid6repair.broken

diff --git a/tests/01r5integ.broken b/tests/01r5integ.broken
new file mode 100644
index 0000000..2073763
--- /dev/null
+++ b/tests/01r5integ.broken
@@ -0,0 +1,7 @@
+fails rarely
+
+Fails about 1 in every 30 runs with a sha mismatch error:
+
+    c49ab26e1b01def7874af9b8a6d6d0c29fdfafe6 /dev/md0 does not match
+    15dc2f73262f811ada53c65e505ceec9cf025cb9 /dev/md0 with /dev/loop3
+    missing
diff --git a/tests/01raid6integ.broken b/tests/01raid6integ.broken
new file mode 100644
index 0000000..1df735f
--- /dev/null
+++ b/tests/01raid6integ.broken
@@ -0,0 +1,7 @@
+fails infrequently
+
+Fails about 1 in 5 with a sha mismatch:
+
+    8286c2bc045ae2cfe9f8b7ae3a898fa25db6926f /dev/md0 does not match
+    a083a0738b58caab37fd568b91b177035ded37df /dev/md0 with /dev/loop2 and
+    /dev/loop3 missing
diff --git a/tests/04r5swap.broken b/tests/04r5swap.broken
new file mode 100644
index 0000000..e38987d
--- /dev/null
+++ b/tests/04r5swap.broken
@@ -0,0 +1,7 @@
+always fails
+
+Fails with errors:
+
+  mdadm: /dev/loop0 has no superblock - assembly aborted
+
+   ERROR: no recovery happening
diff --git a/tests/07autoassemble.broken b/tests/07autoassemble.broken
new file mode 100644
index 0000000..8be0940
--- /dev/null
+++ b/tests/07autoassemble.broken
@@ -0,0 +1,8 @@
+always fails
+
+Prints lots of messages, but the array doesn't assemble. Error
+possibly related to:
+
+  mdadm: /dev/md/1 is busy - skipping
+  mdadm: no recogniseable superblock on /dev/md/testing:0
+  mdadm: /dev/md/2 is busy - skipping
diff --git a/tests/07autodetect.broken b/tests/07autodetect.broken
new file mode 100644
index 0000000..294954a
--- /dev/null
+++ b/tests/07autodetect.broken
@@ -0,0 +1,5 @@
+always fails
+
+Fails with error:
+
+    ERROR: no resync happening
diff --git a/tests/07changelevelintr.broken b/tests/07changelevelintr.broken
new file mode 100644
index 0000000..284b490
--- /dev/null
+++ b/tests/07changelevelintr.broken
@@ -0,0 +1,9 @@
+always fails
+
+Fails with errors:
+
+  mdadm: this change will reduce the size of the array.
+         use --grow --array-size first to truncate array.
+         e.g. mdadm --grow /dev/md0 --array-size 56832
+
+  ERROR: no reshape happening
diff --git a/tests/07changelevels.broken b/tests/07changelevels.broken
new file mode 100644
index 0000000..9b930d9
--- /dev/null
+++ b/tests/07changelevels.broken
@@ -0,0 +1,9 @@
+always fails
+
+Fails with errors:
+
+    mdadm: /dev/loop0 is smaller than given size. 18976K < 19968K + metadata
+    mdadm: /dev/loop1 is smaller than given size. 18976K < 19968K + metadata
+    mdadm: /dev/loop2 is smaller than given size. 18976K < 19968K + metadata
+
+    ERROR: /dev/md0 isn't a block device.
diff --git a/tests/07reshape5intr.broken b/tests/07reshape5intr.broken
new file mode 100644
index 0000000..efe52a6
--- /dev/null
+++ b/tests/07reshape5intr.broken
@@ -0,0 +1,45 @@
+always fails
+
+This patch, recently added to md-next causes the test to always fail:
+
+7e6ba434cc60 ("md: don't unregister sync_thread with reconfig_mutex
+held")
+
+The new error is simply:
+
+   ERROR: no reshape happening
+
+Before the patch, the error seen is below.
+
+--
+
+fails infrequently
+
+Fails roughly 1 in 4 runs with errors:
+
+    mdadm: Merging with already-assembled /dev/md/0
+    mdadm: cannot re-read metadata from /dev/loop6 - aborting
+
+    ERROR: no reshape happening
+
+Also have seen a random deadlock:
+
+     INFO: task mdadm:109702 blocked for more than 30 seconds.
+           Not tainted 5.18.0-rc3-eid-vmlocalyes-dbg-00095-g3c2b5427979d #2040
+     "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
+     task:mdadm           state:D stack:    0 pid:109702 ppid:     1 flags:0x00004000
+     Call Trace:
+      <TASK>
+      __schedule+0x67e/0x13b0
+      schedule+0x82/0x110
+      mddev_suspend+0x2e1/0x330
+      suspend_lo_store+0xbd/0x140
+      md_attr_store+0xcb/0x130
+      sysfs_kf_write+0x89/0xb0
+      kernfs_fop_write_iter+0x202/0x2c0
+      new_sync_write+0x222/0x330
+      vfs_write+0x3bc/0x4d0
+      ksys_write+0xd9/0x180
+      __x64_sys_write+0x43/0x50
+      do_syscall_64+0x3b/0x90
+      entry_SYSCALL_64_after_hwframe+0x44/0xae
diff --git a/tests/07revert-grow.broken b/tests/07revert-grow.broken
new file mode 100644
index 0000000..9b6db86
--- /dev/null
+++ b/tests/07revert-grow.broken
@@ -0,0 +1,31 @@
+always fails
+
+This patch, recently added to md-next causes the test to always fail:
+
+7e6ba434cc60 ("md: don't unregister sync_thread with reconfig_mutex held")
+
+The errors are:
+
+    mdadm: No active reshape to revert on /dev/loop0
+    ERROR: active raid5 not found
+
+Before the patch, the error seen is below.
+
+--
+
+fails rarely
+
+Fails about 1 in every 30 runs with errors:
+
+    mdadm: Merging with already-assembled /dev/md/0
+    mdadm: backup file /tmp/md-backup inaccessible: No such file or directory
+    mdadm: failed to add /dev/loop1 to /dev/md/0: Invalid argument
+    mdadm: failed to add /dev/loop2 to /dev/md/0: Invalid argument
+    mdadm: failed to add /dev/loop3 to /dev/md/0: Invalid argument
+    mdadm: failed to add /dev/loop0 to /dev/md/0: Invalid argument
+    mdadm: /dev/md/0 assembled from 1 drive - need all 5 to start it
+            (use --run to insist).
+
+    grep: /sys/block/md*/md/sync_action: No such file or directory
+
+    ERROR: active raid5 not found
diff --git a/tests/07revert-shrink.broken b/tests/07revert-shrink.broken
new file mode 100644
index 0000000..c33c39e
--- /dev/null
+++ b/tests/07revert-shrink.broken
@@ -0,0 +1,9 @@
+always fails
+
+Fails with errors:
+
+    mdadm: this change will reduce the size of the array.
+           use --grow --array-size first to truncate array.
+           e.g. mdadm --grow /dev/md0 --array-size 53760
+
+    ERROR: active raid5 not found
diff --git a/tests/07testreshape5.broken b/tests/07testreshape5.broken
new file mode 100644
index 0000000..a8ce03e
--- /dev/null
+++ b/tests/07testreshape5.broken
@@ -0,0 +1,12 @@
+always fails
+
+Test seems to run 'test_stripe' at $dir directory, but $dir is never
+set. If $dir is adjusted to $PWD, the test still fails with:
+
+    mdadm: /dev/loop2 is not suitable for this array.
+    mdadm: create aborted
+    ++ return 1
+    ++ cmp -s -n 8192 /dev/md0 /tmp/RandFile
+    ++ echo cmp failed
+    cmp failed
+    ++ exit 2
diff --git a/tests/09imsm-assemble.broken b/tests/09imsm-assemble.broken
new file mode 100644
index 0000000..a6d4d5c
--- /dev/null
+++ b/tests/09imsm-assemble.broken
@@ -0,0 +1,6 @@
+fails infrequently
+
+Fails roughly 1 in 10 runs with errors:
+
+    mdadm: /dev/loop2 is still in use, cannot remove.
+    /dev/loop2 removal from /dev/md/container should have succeeded
diff --git a/tests/09imsm-create-fail-rebuild.broken b/tests/09imsm-create-fail-rebuild.broken
new file mode 100644
index 0000000..40c4b29
--- /dev/null
+++ b/tests/09imsm-create-fail-rebuild.broken
@@ -0,0 +1,5 @@
+always fails
+
+Fails with error:
+
+    **Error**: Array size mismatch - expected 3072, actual 16384
diff --git a/tests/09imsm-overlap.broken b/tests/09imsm-overlap.broken
new file mode 100644
index 0000000..e7ccab7
--- /dev/null
+++ b/tests/09imsm-overlap.broken
@@ -0,0 +1,7 @@
+always fails
+
+Fails with errors:
+
+    **Error**: Offset mismatch - expected 15360, actual 0
+    **Error**: Offset mismatch - expected 15360, actual 0
+    /dev/md/vol3 failed check
diff --git a/tests/10ddf-assemble-missing.broken b/tests/10ddf-assemble-missing.broken
new file mode 100644
index 0000000..bfd8d10
--- /dev/null
+++ b/tests/10ddf-assemble-missing.broken
@@ -0,0 +1,6 @@
+always fails
+
+Fails with errors:
+
+    ERROR: /dev/md/vol0 has unexpected state on /dev/loop10
+    ERROR: unexpected number of online disks on /dev/loop10
diff --git a/tests/10ddf-fail-create-race.broken b/tests/10ddf-fail-create-race.broken
new file mode 100644
index 0000000..6c0df02
--- /dev/null
+++ b/tests/10ddf-fail-create-race.broken
@@ -0,0 +1,7 @@
+usually fails
+
+Fails about 9 out of 10 times with many errors:
+
+    mdadm: cannot open MISSING: No such file or directory
+    ERROR: non-degraded array found
+    ERROR: disk 0 not marked as failed in meta data
diff --git a/tests/10ddf-fail-two-spares.broken b/tests/10ddf-fail-two-spares.broken
new file mode 100644
index 0000000..eeea56d
--- /dev/null
+++ b/tests/10ddf-fail-two-spares.broken
@@ -0,0 +1,5 @@
+fails infrequently
+
+Fails roughly 1 in 3 with error:
+
+   ERROR: /dev/md/vol1 should be optimal in meta data
diff --git a/tests/10ddf-incremental-wrong-order.broken b/tests/10ddf-incremental-wrong-order.broken
new file mode 100644
index 0000000..a5af3ba
--- /dev/null
+++ b/tests/10ddf-incremental-wrong-order.broken
@@ -0,0 +1,9 @@
+always fails
+
+Fails with errors:
+    ERROR: sha1sum of /dev/md/vol0 has changed
+    ERROR: /dev/md/vol0 has unexpected state on /dev/loop10
+    ERROR: unexpected number of online disks on /dev/loop10
+    ERROR: /dev/md/vol0 has unexpected state on /dev/loop8
+    ERROR: unexpected number of online disks on /dev/loop8
+    ERROR: sha1sum of /dev/md/vol0 has changed
diff --git a/tests/14imsm-r1_2d-grow-r1_3d.broken b/tests/14imsm-r1_2d-grow-r1_3d.broken
new file mode 100644
index 0000000..4ef1d40
--- /dev/null
+++ b/tests/14imsm-r1_2d-grow-r1_3d.broken
@@ -0,0 +1,5 @@
+always fails
+
+Fails with error:
+
+    mdadm/tests/func.sh: line 325: dvsize/chunk: division by 0 (error token is "chunk")
diff --git a/tests/14imsm-r1_2d-takeover-r0_2d.broken b/tests/14imsm-r1_2d-takeover-r0_2d.broken
new file mode 100644
index 0000000..89cd4e5
--- /dev/null
+++ b/tests/14imsm-r1_2d-takeover-r0_2d.broken
@@ -0,0 +1,6 @@
+always fails
+
+Fails with error:
+
+    tests/func.sh: line 325: dvsize/chunk: division by 0 (error token
+		is "chunk")
diff --git a/tests/18imsm-r10_4d-takeover-r0_2d.broken b/tests/18imsm-r10_4d-takeover-r0_2d.broken
new file mode 100644
index 0000000..a27399f
--- /dev/null
+++ b/tests/18imsm-r10_4d-takeover-r0_2d.broken
@@ -0,0 +1,5 @@
+fails rarely
+
+Fails about 1 run in 100 with message:
+
+   ERROR:  size is wrong for /dev/md/vol0: 2 * 5120 (chunk=128) = 20480, not 0
diff --git a/tests/18imsm-r1_2d-takeover-r0_1d.broken b/tests/18imsm-r1_2d-takeover-r0_1d.broken
new file mode 100644
index 0000000..aa1982e
--- /dev/null
+++ b/tests/18imsm-r1_2d-takeover-r0_1d.broken
@@ -0,0 +1,6 @@
+always fails
+
+Fails with error:
+
+    tests/func.sh: line 325: dvsize/chunk: division by 0 (error token
+			is "chunk")
diff --git a/tests/19raid6auto-repair.broken b/tests/19raid6auto-repair.broken
new file mode 100644
index 0000000..e91a142
--- /dev/null
+++ b/tests/19raid6auto-repair.broken
@@ -0,0 +1,5 @@
+always fails
+
+Fails with:
+
+    "should detect errors"
diff --git a/tests/19raid6repair.broken b/tests/19raid6repair.broken
new file mode 100644
index 0000000..e91a142
--- /dev/null
+++ b/tests/19raid6repair.broken
@@ -0,0 +1,5 @@
+always fails
+
+Fails with:
+
+    "should detect errors"
-- 
2.39.1

