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block: Export integrity data interval size in sysfs

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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: Martin K. Petersen <martin.petersen@oracle.com>
Reviewed-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Martin K. Petersen 2015-10-21 13:19:43 -04:00 committed by Jens Axboe
parent a48f041d91
commit 4c241d08db
2 changed files with 21 additions and 0 deletions
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7
Documentation/ABI/testing/sysfs-block
View File

@ -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

14
block/blk-integrity.c
View File

@ -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,