linux.git/drivers/md/md-linear.c, branch v4.19.149

md: improve handling of bio with REQ_PREFLUSH in md_flush_request()

2019-12-17T19:34:55+00:00

commit 775d78319f1ceb32be8eb3b1202ccdc60e9cb7f1 upstream.

If pers->make_request fails in md_flush_request(), the bio is lost. To
fix this, pass back a bool to indicate if the original make_request call
should continue to handle the I/O and instead of assuming the flush logic
will push it to completion.

Convert md_flush_request to return a bool and no longer calls the raid
driver's make_request function.  If the return is true, then the md flush
logic has or will complete the bio and the md make_request call is done.
If false, then the md make_request function needs to keep processing like
it is a normal bio. Let the original call to md_handle_request handle any
need to retry sending the bio to the raid driver's make_request function
should it be needed.

Also mark md_flush_request and the make_request function pointer as
__must_check to issue warnings should these critical return values be
ignored.

Fixes: 2bc13b83e629 ("md: batch flush requests.")
Cc: stable@vger.kernel.org # # v4.19+
Cc: NeilBrown 
Signed-off-by: David Jeffery 
Reviewed-by: Xiao Ni 
Signed-off-by: Song Liu 
Signed-off-by: Greg Kroah-Hartman

md: convert to bioset_init()/mempool_init()

2018-05-30T21:33:32+00:00

Convert md to embedded bio sets.

Signed-off-by: Kent Overstreet 
Signed-off-by: Jens Axboe

block: Use blk_queue_flag_() in drivers instead of queue_flag_()

2018-03-08T21:13:48+00:00

This patch has been generated as follows:

for verb in set_unlocked clear_unlocked set clear; do
  replace-in-files queue_flag_${verb} blk_queue_flag_${verb%_unlocked} \
    $(git grep -lw queue_flag_${verb} drivers block/bsg*)
done

Except for protecting all queue flag changes with the queue lock
this patch does not change any functionality.

Cc: Mike Snitzer 
Cc: Shaohua Li 
Cc: Christoph Hellwig 
Cc: Hannes Reinecke 
Cc: Ming Lei 
Signed-off-by: Bart Van Assche 
Reviewed-by: Martin K. Petersen 
Reviewed-by: Johannes Thumshirn 
Acked-by: Martin K. Petersen 
Signed-off-by: Jens Axboe

md: rename some drivers/md/ files to have an "md-" prefix

2017-10-17T02:06:36+00:00

Motivated by the desire to illiminate the imprecise nature of
DM-specific patches being unnecessarily sent to both the MD maintainer
and mailing-list.  Which is born out of the fact that DM files also
reside in drivers/md/

Now all MD-specific files in drivers/md/ start with either "raid" or
"md-" and the MAINTAINERS file has been updated accordingly.

Shaohua: don't change module name

Signed-off-by: Mike Snitzer 
Signed-off-by: Shaohua Li

linux.git/drivers/md/md-linear.c, branch v4.19.149

md: improve handling of bio with REQ_PREFLUSH in md_flush_request()

md: convert to bioset_init()/mempool_init()

block: Use blk_queue_flag_*() in drivers instead of queue_flag_*()

md: rename some drivers/md/ files to have an "md-" prefix

block: Use blk_queue_flag_() in drivers instead of queue_flag_()