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blk-sysfs: Add 'chunk_sectors' to sysfs attributes

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The queue limits already have a 'chunk_sectors' setting, so
we should be presenting it via sysfs.

Signed-off-by: Hannes Reinecke <hare@suse.de>

[Damien: Updated Documentation/ABI/testing/sysfs-block]

Signed-off-by: Damien Le Moal <damien.lemoal@hgst.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Reviewed-by: Shaun Tancheff <shaun.tancheff@seagate.com>
Tested-by: Shaun Tancheff <shaun.tancheff@seagate.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Hannes Reinecke
2016-10-18 15:40:30 +09:00
committed by Jens Axboe
parent 797476b88b
commit 87caf97cf5
2 changed files with 24 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files
Documentation/ABI/testing/sysfs-block
+13
View File
@@ -251,3 +251,16 @@ Description:
since drive-managed zoned block devices do not support since drive-managed zoned block devices do not support
zone commands, they will be treated as regular block zone commands, they will be treated as regular block
devices and zoned will report "none". devices and zoned will report "none".
What: /sys/block/<disk>/queue/chunk_sectors
Date: September 2016
Contact: Hannes Reinecke <hare@suse.com>
Description:
chunk_sectors has different meaning depending on the type
of the disk. For a RAID device (dm-raid), chunk_sectors
indicates the size in 512B sectors of the RAID volume
stripe segment. For a zoned block device, either
host-aware or host-managed, chunk_sectors indicates the
size of 512B sectors of the zones of the device, with
the eventual exception of the last zone of the device
which may be smaller.
block/blk-sysfs.c
+11
View File
@@ -130,6 +130,11 @@ static ssize_t queue_physical_block_size_show(struct request_queue *q, char *pag
return queue_var_show(queue_physical_block_size(q), page); return queue_var_show(queue_physical_block_size(q), page);
} }
static ssize_t queue_chunk_sectors_show(struct request_queue *q, char *page)
{
return queue_var_show(q->limits.chunk_sectors, page);
}
static ssize_t queue_io_min_show(struct request_queue *q, char *page) static ssize_t queue_io_min_show(struct request_queue *q, char *page)
{ {
return queue_var_show(queue_io_min(q), page); return queue_var_show(queue_io_min(q), page);
@@ -455,6 +460,11 @@ static struct queue_sysfs_entry queue_physical_block_size_entry = {
.show = queue_physical_block_size_show, .show = queue_physical_block_size_show,
}; };
static struct queue_sysfs_entry queue_chunk_sectors_entry = {
.attr = {.name = "chunk_sectors", .mode = S_IRUGO },
.show = queue_chunk_sectors_show,
};
static struct queue_sysfs_entry queue_io_min_entry = { static struct queue_sysfs_entry queue_io_min_entry = {
.attr = {.name = "minimum_io_size", .mode = S_IRUGO }, .attr = {.name = "minimum_io_size", .mode = S_IRUGO },
.show = queue_io_min_show, .show = queue_io_min_show,
@@ -555,6 +565,7 @@ static struct attribute *default_attrs[] = {
&queue_hw_sector_size_entry.attr, &queue_hw_sector_size_entry.attr,
&queue_logical_block_size_entry.attr, &queue_logical_block_size_entry.attr,
&queue_physical_block_size_entry.attr, &queue_physical_block_size_entry.attr,
&queue_chunk_sectors_entry.attr,
&queue_io_min_entry.attr, &queue_io_min_entry.attr,
&queue_io_opt_entry.attr, &queue_io_opt_entry.attr,
&queue_discard_granularity_entry.attr, &queue_discard_granularity_entry.attr,