Hi, Recently we've added several new operations for zoned block devices blk-zone.c ZBD). These operations have a direct effect on the zone-state machine present in the null_blk_zoned.c. This will allow us to add new testcases in blktests in order to verify the correct operations on the driver side. This is a small patch series which adds tracepoints for the null_blk block driver when configured in a zoned mode (with command line parameter zoned=1). The first patch is a prep patch that adds a helper to stringify zone conditions which we use in the trace, the second patch adds new tracepoint definitions and the third patch allows null_blk_zoned to trace operations. Please have a look at the end for sample output. The change-log is present in the respective patches. Regards, Chaitanya Chaitanya Kulkarni (3): block: add a zone condition debug helper null_blk: add tracepoint helpers for zoned mode null_blk: add trace in null_blk_zoned.c block/blk-zoned.c | 32 ++++++++++++++ drivers/block/Makefile | 3 ++ drivers/block/null_blk_trace.c | 20 +++++++++ drivers/block/null_blk_trace.h | 78 ++++++++++++++++++++++++++++++++++ drivers/block/null_blk_zoned.c | 12 +++++- include/linux/blkdev.h | 10 +++++ 6 files changed, 154 insertions(+), 1 deletion(-) create mode 100644 drivers/block/null_blk_trace.c create mode 100644 drivers/block/null_blk_trace.h Sample Test Output :- # modprobe null_blk zoned=1 zone_size=128 gb=1 bs=4096 # cd /sys/kernel/debug/tracing/ # echo 1 > events/nullb/enable; cat trace_pipe # for i in open close finish reset; do blkzone $i /dev/nullb0; done # dd if=/dev/zero of=/dev/nullb0 bs=4k count=5 nullb_zone_op: disk=nullb0, req=ZONE_OPEN zone_no=0 zone_cond=EXP_OPEN nullb_zone_op: disk=nullb0, req=ZONE_OPEN zone_no=1 zone_cond=EXP_OPEN nullb_zone_op: disk=nullb0, req=ZONE_OPEN zone_no=2 zone_cond=EXP_OPEN nullb_zone_op: disk=nullb0, req=ZONE_OPEN zone_no=3 zone_cond=EXP_OPEN nullb_zone_op: disk=nullb0, req=ZONE_OPEN zone_no=4 zone_cond=EXP_OPEN nullb_zone_op: disk=nullb0, req=ZONE_OPEN zone_no=5 zone_cond=EXP_OPEN nullb_zone_op: disk=nullb0, req=ZONE_OPEN zone_no=6 zone_cond=EXP_OPEN nullb_zone_op: disk=nullb0, req=ZONE_OPEN zone_no=7 zone_cond=EXP_OPEN nullb_zone_op: disk=nullb0, req=ZONE_CLOSE zone_no=0 zone_cond=EMPTY nullb_zone_op: disk=nullb0, req=ZONE_CLOSE zone_no=1 zone_cond=EMPTY nullb_zone_op: disk=nullb0, req=ZONE_CLOSE zone_no=2 zone_cond=EMPTY nullb_zone_op: disk=nullb0, req=ZONE_CLOSE zone_no=3 zone_cond=EMPTY nullb_zone_op: disk=nullb0, req=ZONE_CLOSE zone_no=4 zone_cond=EMPTY nullb_zone_op: disk=nullb0, req=ZONE_CLOSE zone_no=5 zone_cond=EMPTY nullb_zone_op: disk=nullb0, req=ZONE_CLOSE zone_no=6 zone_cond=EMPTY nullb_zone_op: disk=nullb0, req=ZONE_CLOSE zone_no=7 zone_cond=EMPTY nullb_zone_op: disk=nullb0, req=ZONE_FINISH zone_no=0 zone_cond=FULL nullb_zone_op: disk=nullb0, req=ZONE_FINISH zone_no=1 zone_cond=FULL nullb_zone_op: disk=nullb0, req=ZONE_FINISH zone_no=2 zone_cond=FULL nullb_zone_op: disk=nullb0, req=ZONE_FINISH zone_no=3 zone_cond=FULL nullb_zone_op: disk=nullb0, req=ZONE_FINISH zone_no=4 zone_cond=FULL nullb_zone_op: disk=nullb0, req=ZONE_FINISH zone_no=5 zone_cond=FULL nullb_zone_op: disk=nullb0, req=ZONE_FINISH zone_no=6 zone_cond=FULL nullb_zone_op: disk=nullb0, req=ZONE_FINISH zone_no=7 zone_cond=FULL nullb_zone_op: disk=nullb0, req=ZONE_RESET_ALL zone_no=0 zone_cond=EMPTY nullb_zone_op: disk=nullb0, req=WRITE zone_no=0 zone_cond=IMP_OPEN nullb_zone_op: disk=nullb0, req=WRITE zone_no=0 zone_cond=IMP_OPEN nullb_zone_op: disk=nullb0, req=WRITE zone_no=0 zone_cond=IMP_OPEN nullb_zone_op: disk=nullb0, req=WRITE zone_no=0 zone_cond=IMP_OPEN nullb_zone_op: disk=nullb0, req=WRITE zone_no=0 zone_cond=IMP_OPEN -- 2.22.1
