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lib/bdev: Expose DIF type and location of bdev.

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This patch is for DIF settings.

Add fields dif_type and dif_is_head_of_md to struct spdk_bdev and
add APIs spdk_bdev_get_dif_type and spdk_bdev_is_dif_head_of_md to
bdev APIs.

The fields dif_type and dif_is_head_of_md are added to the JSON
information dump.

Change-Id: I15db10cb170a76e77fc44a36a68224917d633160
Signed-off-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
Reviewed-on: https://review.gerrithub.io/c/443184
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
This commit is contained in:
Shuhei Matsumoto 2019-02-05 09:50:56 +09:00 committed by Jim Harris
parent 96f29261d4
commit 7bb007d206
4 changed files with 60 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

20
include/spdk/bdev.h
View File

@ -45,6 +45,7 @@
#include "spdk/json.h"
#include "spdk/queue.h"
#include "spdk/histogram_data.h"
#include "spdk/dif.h"
#ifdef __cplusplus
extern "C" {
@ -425,6 +426,25 @@ uint32_t spdk_bdev_get_md_size(const struct spdk_bdev *bdev);
*/
bool spdk_bdev_is_md_interleaved(const struct spdk_bdev *bdev);
/**
* Get DIF type of the block device.
*
* \param bdev Block device to query.
* \return DIF type of the block device.
*/
enum spdk_dif_type spdk_bdev_get_dif_type(const struct spdk_bdev *bdev);
/**
* Check whether DIF is set in the first 8 bytes or the last 8 bytes of metadata.
*
* \param bdev Block device to query.
* \return true if DIF is set in the first 8 bytes of metadata, or false
* if DIF is set in the last 8 bytes of metadata.
*
* Note that this function is valid only if DIF type is not SPDK_DIF_DISABLE.
*/
bool spdk_bdev_is_dif_head_of_md(const struct spdk_bdev *bdev);
/**
* Get the most recently measured queue depth from a bdev.
*

17
include/spdk/bdev_module.h
View File

@ -303,6 +303,23 @@ struct spdk_bdev {
*/
bool md_interleave;
/**
* DIF type for this bdev.
*
* Note that this field is valid only if there is metadata.
*/
enum spdk_dif_type dif_type;
/*
* DIF location.
*
* Set to true if DIF is set in the first 8 bytes of metadata or false
* if DIF is set in the last 8 bytes of metadata.
*
* Note that this field is valid only if DIF is enabled.
*/
bool dif_is_head_of_md;
/**
* Pointer to the bdev module that registered this bdev.
*/

19
lib/bdev/bdev.c
View File

@ -2331,6 +2331,25 @@ spdk_bdev_is_md_interleaved(const struct spdk_bdev *bdev)
return (bdev->md_len != 0) && bdev->md_interleave;
}
enum spdk_dif_type spdk_bdev_get_dif_type(const struct spdk_bdev *bdev)
{
if (bdev->md_len != 0) {
return bdev->dif_type;
} else {
return SPDK_DIF_DISABLE;
}
}
bool
spdk_bdev_is_dif_head_of_md(const struct spdk_bdev *bdev)
{
if (spdk_bdev_get_dif_type(bdev) != SPDK_DIF_DISABLE) {
return bdev->dif_is_head_of_md;
} else {
return false;
}
}
uint64_t
spdk_bdev_get_qd(const struct spdk_bdev *bdev)
{

4
lib/bdev/rpc/bdev_rpc.c
View File

@ -248,6 +248,10 @@ spdk_rpc_dump_bdev_info(struct spdk_json_write_ctx *w,
if (spdk_bdev_get_md_size(bdev) != 0) {
spdk_json_write_named_uint32(w, "md_size", spdk_bdev_get_md_size(bdev));
spdk_json_write_named_bool(w, "md_interleave", spdk_bdev_is_md_interleaved(bdev));
spdk_json_write_named_uint32(w, "dif_type", spdk_bdev_get_dif_type(bdev));
if (spdk_bdev_get_dif_type(bdev) != SPDK_DIF_DISABLE) {
spdk_json_write_named_bool(w, "dif_is_head_of_md", spdk_bdev_is_dif_head_of_md(bdev));
}
}
spdk_json_write_named_object_begin(w, "assigned_rate_limits");