@@ -1071,8 +1071,11 @@ voud tst_find_backing_dev(const char *path, char *dev);
-------------------------------------------------------------------------------
This function finds the block dev that this path belongs to, it uses stat function
-to get the major/minor number of the path. Then scan them in '/proc/self/mountinfo'
-and list 2th column value after ' - ' string as its block dev if match succeeds.
+to get the major/minor number of the path.
+This function finds the block dev that this path belongs to, it uses the unevent
+file in sysfs to find the device name. It needs to discriminate between btrfs
+and not btrfs. For non btrfs filesystems it uses the minor, major numbers. For
+btrfs it uses the fs uuid.
[source,c]
-------------------------------------------------------------------------------
Since the tst_find_backing_dev logic is changed, the doc is updated accordingly. Signed-off-by: Alessandro Carminati <alessandro.carminati@gmail.com> --- doc/c-test-api.txt | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-)