[PATCH 2/4] generic/765: Fix sysfs path for nvme partitions

This tests checks atomic write limits reported by statx() are same as
the ones reported by sysfs, however nvme partitions don't have the
/sys/block/nvme0n1p1 style entry and also use the namespace's queue
limits for atomic writes. This causes the test to fail because it
expects /sys/block/nvme0n*p* to be present.

Hence, in this case, just check against the parent namespace.

Reported-by: Disha Goel <[email protected]>
Signed-off-by: Ojaswin Mujoo <[email protected]>
---
 tests/generic/765 | 23 +++++++++++++++++++----
 1 file changed, 19 insertions(+), 4 deletions(-)

diff --git a/tests/generic/765 b/tests/generic/765
index 8c4e0bd0..4c768783 100755
--- a/tests/generic/765
+++ b/tests/generic/765
@@ -94,16 +94,31 @@ test_atomic_writes()
     _scratch_unmount
 }
 
-sys_min_write=$(cat "/sys/block/$(_short_dev $SCRATCH_DEV)/queue/atomic_write_unit_min_bytes")
-sys_max_write=$(cat "/sys/block/$(_short_dev $SCRATCH_DEV)/queue/atomic_write_unit_max_bytes")
+# Get the right sysfs dev for the atomic write device
+get_aw_dev() {
+    local dev
+    dev=$(_short_dev "$1")
+
+    # Special case: nvme partitions don't have the /sys/block/nvme0n1p1 style
+    # entry and also use the namespace's queue limits for atomic writes, hence
+    # just return the parent namespace.
+    if [[ $dev == nvme* ]]; then
+        echo "${dev%%p[0-9]*}"
+    else
+        echo "$dev"
+    fi
+}
+
+sys_min_write=$(cat "/sys/block/$(get_aw_dev $SCRATCH_DEV)/queue/atomic_write_unit_min_bytes")
+sys_max_write=$(cat "/sys/block/$(get_aw_dev $SCRATCH_DEV)/queue/atomic_write_unit_max_bytes")
 
 bdev_min_write=$(_get_atomic_write_unit_min $SCRATCH_DEV)
 bdev_max_write=$(_get_atomic_write_unit_max $SCRATCH_DEV)
 
 echo "sysfs awu_min $sys_min_write" >> $seqres.full
-echo "sysfs awu_min $sys_max_write" >> $seqres.full
+echo "sysfs awu_max $sys_max_write" >> $seqres.full
 echo "bdev awu_min $bdev_min_write" >> $seqres.full
-echo "bdev awu_min $bdev_max_write" >> $seqres.full
+echo "bdev awu_max $bdev_max_write" >> $seqres.full
 
 # Test that statx atomic values are the same as sysfs values
 if [ "$sys_min_write" -ne "$bdev_min_write" ]; then
-- 
2.53.0