Messages in this thread Patch in this message | | | From | Hannes Reinecke <> | Subject | [PATCH 3/4] loop: Add 'lo_logical_blocksize' | Date | Mon, 31 Oct 2016 20:37:18 +0100 |
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Add a new field 'lo_logical_blocksize' to hold the logical blocksize of the loop device.
Signed-off-by: Hannes Reinecke <hare@suse.de> --- drivers/block/loop.c | 9 +++++++-- drivers/block/loop.h | 1 + 2 files changed, 8 insertions(+), 2 deletions(-)
diff --git a/drivers/block/loop.c b/drivers/block/loop.c index ff5c874..a863667 100644 --- a/drivers/block/loop.c +++ b/drivers/block/loop.c @@ -233,8 +233,11 @@ figure_loop_size(struct loop_device *lo, loff_t offset, loff_t sizelimit) lo->lo_offset = offset; if (lo->lo_sizelimit != sizelimit) lo->lo_sizelimit = sizelimit; - if (lo->lo_flags & LO_FLAGS_BLOCKSIZE) + if (lo->lo_flags & LO_FLAGS_BLOCKSIZE) { blk_queue_physical_block_size(lo->lo_queue, lo->lo_blocksize); + blk_queue_logical_block_size(lo->lo_queue, + lo->lo_logical_blocksize); + } set_capacity(lo->lo_disk, x); bd_set_size(bdev, (loff_t)get_capacity(bdev->bd_disk) << 9); /* let user-space know about the new size */ @@ -816,6 +819,7 @@ static void loop_config_discard(struct loop_device *lo) struct file *file = lo->lo_backing_file; struct inode *inode = file->f_mapping->host; struct request_queue *q = lo->lo_queue; + int lo_bits = blksize_bits(lo->lo_logical_blocksize); /* * We use punch hole to reclaim the free space used by the @@ -835,7 +839,7 @@ static void loop_config_discard(struct loop_device *lo) q->limits.discard_granularity = inode->i_sb->s_blocksize; q->limits.discard_alignment = 0; - blk_queue_max_discard_sectors(q, UINT_MAX >> 9); + blk_queue_max_discard_sectors(q, UINT_MAX >> lo_bits); q->limits.discard_zeroes_data = 1; queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, q); } @@ -924,6 +928,7 @@ static int loop_set_fd(struct loop_device *lo, fmode_t mode, lo->use_dio = false; lo->lo_blocksize = lo_blocksize; + lo->lo_logical_blocksize = 512; lo->lo_device = bdev; lo->lo_flags = lo_flags; lo->lo_backing_file = file; diff --git a/drivers/block/loop.h b/drivers/block/loop.h index fb2237c..579f2f7 100644 --- a/drivers/block/loop.h +++ b/drivers/block/loop.h @@ -49,6 +49,7 @@ struct loop_device { struct file * lo_backing_file; struct block_device *lo_device; unsigned lo_blocksize; + unsigned lo_logical_blocksize; void *key_data; gfp_t old_gfp_mask; -- 2.6.6
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