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block: add sysfs entry for virt boundary mask 

This entry will expose the bio vector alignment mask for a specific
block device.

Signed-off-by: Max Gurtovoy <mgurtovoy@nvidia.com>
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Link: https://lore.kernel.org/r/20210405132012.12504-1-mgurtovoy@nvidia.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Max Gurtovoy 2021-04-05 13:20:12 +00:00 committed by Jens Axboe
parent 430a67f9d6
commit 28af742875
1 changed files with 8 additions and 1 deletions
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9
block/blk-sysfs.c
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@ -60,7 +60,7 @@ static ssize_t queue_var_store64(s64 *var, const char *page)
static ssize_t queue_requests_show(struct request_queue *q, char *page)
{
return queue_var_show(q->nr_requests, (page));
return queue_var_show(q->nr_requests, page);
}
static ssize_t
@ -264,6 +264,11 @@ static ssize_t queue_max_hw_sectors_show(struct request_queue *q, char *page)
return queue_var_show(max_hw_sectors_kb, (page));
}
static ssize_t queue_virt_boundary_mask_show(struct request_queue *q, char *page)
{
return queue_var_show(q->limits.virt_boundary_mask, (page));
}
#define QUEUE_SYSFS_BIT_FNS(name, flag, neg) \
static ssize_t \
queue_##name##_show(struct request_queue *q, char *page) \
@ -610,6 +615,7 @@ QUEUE_RO_ENTRY(queue_fua, "fua");
QUEUE_RO_ENTRY(queue_dax, "dax");
QUEUE_RW_ENTRY(queue_io_timeout, "io_timeout");
QUEUE_RW_ENTRY(queue_wb_lat, "wbt_lat_usec");
QUEUE_RO_ENTRY(queue_virt_boundary_mask, "virt_boundary_mask");
#ifdef CONFIG_BLK_DEV_THROTTLING_LOW
QUEUE_RW_ENTRY(blk_throtl_sample_time, "throttle_sample_time");
@ -670,6 +676,7 @@ static struct attribute *queue_attrs[] = {
#ifdef CONFIG_BLK_DEV_THROTTLING_LOW
&blk_throtl_sample_time_entry.attr,
#endif
&queue_virt_boundary_mask_entry.attr,
NULL,
};