kernel/linux.git/include/linux/blktrace_api.h, branch linux-2.6.28.y

blktrace: add support for driver data

2008-10-17T06:46:57+00:00

This patch adds the new api call blk_add_driver_data() to blktrace. It allows to trace device driver-specific binary data. Signed-off-by: Stefan Raspl Signed-off-by: Martin Peschke Signed-off-by: Jens Axboe

blktrace: use BLKTRACE_BDEV_SIZE as the name size for setup structure

2008-10-09T06:56:20+00:00

Define as 32, which is is what BDEVNAME_SIZE is/was as well. This keeps the user interface the same and gets rid of the difference between kernel and user api here. Signed-off-by: Jens Axboe

include blktrace_api.h in headers_install

2008-10-09T06:56:19+00:00

This header file is of interest for user space programming, i.e. for tools that process blktrace data. We would like to use it for a tool on-top of blktrace which processes data provided by blktrace. For this purpose, it would be helpful if the blktrace API would make it to /usr/include/linux. The git tree for the blktrace tools comes with its own copy of this header file. I didn't manage to replace that copy with the file generated by the patch below yet. A few more cleanups would be needed. For example, the blktrace ioctl numbers, which are currently defined in usr/include/fs.h, might need to be moved. Should be feasible, though. Signed-off-by: Sven Schuetz Signed-off-by: Martin Peschke Signed-off-by: Jens Axboe

block: Add interface to abort queued requests

2008-10-09T06:56:13+00:00

Signed-off-by: Mike Anderson Signed-off-by: Jens Axboe

blktrace: support discard requests

2008-10-09T06:56:01+00:00

Signed-off-by: David Woodhouse Signed-off-by: Jens Axboe

Added in user-injected messages into blk traces

2008-07-03T11:21:12+00:00

This allows a user to annotate the blk trace stream: writing a suitable message to {/sys/kernel/debug}/block//msg will have it propagated into the trace stream. Signed-off-by: Alan D. Brunelle Signed-off-by: Jens Axboe

block: make blktrace use per-cpu buffers for message notes

2008-05-28T12:49:27+00:00

Currently it uses a single static char array, but that risks being corrupted when multiple users issue message notes at the same time. Make the buffers dynamically allocated when the trace is setup and make them per-cpu instead. The default max message size of 1k is also very large, the interface is mainly for small text notes. So shrink it to 128 bytes. Signed-off-by: Jens Axboe

Added in MESSAGE notes for blktraces

2008-05-28T12:49:27+00:00

Allows messages to be inserted into blktrace streams. Signed-off-by: Alan D. Brunelle Signed-off-by: Jens Axboe

Fix blktrace compile warning

2008-01-29T20:55:15+00:00

request_queue_t is deprecated Signed-off-by: Martin K. Petersen Signed-off-by: Jens Axboe

blktrace: Add blktrace ioctls to SCSI generic devices

2008-01-28T09:04:46+00:00

Since the SCSI layer uses the request queues from the block layer, blktrace can also be used to trace the requests to all SCSI devices (like SCSI tape drives), not only disks. The only missing part is the ioctl interface to start and stop tracing. This patch adds the SETUP, START, STOP and TEARDOWN ioctls from blktrace to the sg device files. With this change, blktrace can be used for SCSI devices like for disks, e.g.: blktrace -d /dev/sg1 -o - | blkparse -i - Signed-off-by: Christof Schmitt Signed-off-by: Jens Axboe