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Commit 4c241d08 authored by Martin K. Petersen's avatar Martin K. Petersen Committed by Jens Axboe
Browse files

block: Export integrity data interval size in sysfs 



The size of the data interval was not exported in the sysfs integrity
directory. Export it so that userland apps can tell whether the interval
is different from the device's logical block size.

Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
Reviewed-by: default avatarSagi Grimberg <sagig@mellanox.com>
Signed-off-by: default avatarDan Williams <dan.j.williams@intel.com>
Signed-off-by: default avatarJens Axboe <axboe@fb.com>
parent a48f041d

Documentation/ABI/testing/sysfs-block

+7 −0
Original line number Diff line number Diff line
@@ -60,6 +60,13 @@ Description: 
		Indicates whether a storage device is capable of storing

		integrity metadata. Set if the device is T10 PI-capable.



What:		/sys/block/<disk>/integrity/protection_interval_bytes

Date:		July 2015

Contact:	Martin K. Petersen <martin.petersen@oracle.com>

Description:

		Describes the number of data bytes which are protected

		by one integrity tuple. Typically the device's logical

		block size.



What:		/sys/block/<disk>/integrity/write_generate

Date:		June 2008

block/blk-integrity.c

+14 −0
Original line number Diff line number Diff line
@@ -289,6 +289,14 @@ static ssize_t integrity_tag_size_show(struct blk_integrity *bi, char *page) 
		return sprintf(page, "0\n");

}



static ssize_t integrity_interval_show(struct blk_integrity *bi, char *page)

{

	if (bi != NULL)

		return sprintf(page, "%u\n", 1 << bi->interval_exp);

	else

		return sprintf(page, "0\n");

}



static ssize_t integrity_verify_store(struct blk_integrity *bi,

				      const char *page, size_t count)

{
@@ -343,6 +351,11 @@ static struct integrity_sysfs_entry integrity_tag_size_entry = { 
	.show = integrity_tag_size_show,

};



static struct integrity_sysfs_entry integrity_interval_entry = {

	.attr = { .name = "protection_interval_bytes", .mode = S_IRUGO },

	.show = integrity_interval_show,

};



static struct integrity_sysfs_entry integrity_verify_entry = {

	.attr = { .name = "read_verify", .mode = S_IRUGO | S_IWUSR },

	.show = integrity_verify_show,
@@ -363,6 +376,7 @@ static struct integrity_sysfs_entry integrity_device_entry = { 
static struct attribute *integrity_attrs[] = {

	&integrity_format_entry.attr,

	&integrity_tag_size_entry.attr,

	&integrity_interval_entry.attr,

	&integrity_verify_entry.attr,

	&integrity_generate_entry.attr,

	&integrity_device_entry.attr,