On Thu, Sep 15 2022 at 12:48P -0400, Sarthak Kukreti <sarthakkukreti@xxxxxxxxxxxx> wrote: > From: Sarthak Kukreti <sarthakkukreti@xxxxxxxxxxxx> > > Introduce block request REQ_OP_PROVISION. The intent of this request > is to request underlying storage to preallocate disk space for the given > block range. Block device that support this capability will export > a provision limit within their request queues. > > Signed-off-by: Sarthak Kukreti <sarthakkukreti@xxxxxxxxxxxx> > --- > block/blk-core.c | 5 ++++ > block/blk-lib.c | 55 +++++++++++++++++++++++++++++++++++++++ > block/blk-merge.c | 17 ++++++++++++ > block/blk-settings.c | 19 ++++++++++++++ > block/blk-sysfs.c | 8 ++++++ > block/bounce.c | 1 + > include/linux/bio.h | 6 +++-- > include/linux/blk_types.h | 5 +++- > include/linux/blkdev.h | 16 ++++++++++++ > 9 files changed, 129 insertions(+), 3 deletions(-) > > diff --git a/block/blk-settings.c b/block/blk-settings.c > index 8bb9eef5310e..be79ad68b330 100644 > --- a/block/blk-settings.c > +++ b/block/blk-settings.c > @@ -57,6 +57,7 @@ void blk_set_default_limits(struct queue_limits *lim) > lim->misaligned = 0; > lim->zoned = BLK_ZONED_NONE; > lim->zone_write_granularity = 0; > + lim->max_provision_sectors = 0; > } > EXPORT_SYMBOL(blk_set_default_limits); > > @@ -81,6 +82,7 @@ void blk_set_stacking_limits(struct queue_limits *lim) > lim->max_dev_sectors = UINT_MAX; > lim->max_write_zeroes_sectors = UINT_MAX; > lim->max_zone_append_sectors = UINT_MAX; > + lim->max_provision_sectors = UINT_MAX; > } > EXPORT_SYMBOL(blk_set_stacking_limits); > Please work through the blk_stack_limits() implementation too (simple min_not_zero?).
