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lib/bdev: Added spdk_bdev_get_zone_info() command

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spdk_bdev_get_zone_info() is used for retriving
information about zones inside zoned namespace.

Change-Id: I8f931505245e984c0b1ee35ed6592c978ee47544
Signed-off-by: Wojciech Malikowski <wojciech.malikowski@intel.com>
Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/460643
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:
Wojciech Malikowski 2019-07-04 09:28:13 -04:00 committed by Jim Harris
parent ec63516af5
commit 02cabd9eb8
4 changed files with 79 additions and 0 deletions
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1
include/spdk/bdev.h
View File

@ -126,6 +126,7 @@ enum spdk_bdev_io_type {
SPDK_BDEV_IO_TYPE_NVME_IO_MD,
SPDK_BDEV_IO_TYPE_WRITE_ZEROES,
SPDK_BDEV_IO_TYPE_ZCOPY,
SPDK_BDEV_IO_TYPE_GET_ZONE_INFO,
SPDK_BDEV_NUM_IO_TYPES /* Keep last */
};

11
include/spdk/bdev_module.h
View File

@ -43,6 +43,7 @@
#include "spdk/stdinc.h"
#include "spdk/bdev.h"
#include "spdk/bdev_zone.h"
#include "spdk/queue.h"
#include "spdk/scsi_spec.h"
#include "spdk/thread.h"
@ -512,6 +513,16 @@ struct spdk_bdev_io {
/* meta data buffer size to transfer */
size_t md_len;
} nvme_passthru;
struct {
/* First logical block of a zone */
uint64_t zone_id;
/* Number of zones */
uint32_t num_zones;
/* The data buffer */
void *buf;
} zone_mgmt;
} u;
/** It may be used by modules to put the bdev_io into its own list. */

39
include/spdk/bdev_zone.h
View File

@ -39,6 +39,7 @@
#define SPDK_BDEV_ZONE_H
#include "spdk/stdinc.h"
#include "spdk/bdev.h"
/**
* \brief SPDK block device.
@ -48,6 +49,22 @@
struct spdk_bdev;
enum spdk_bdev_zone_state {
SPDK_BDEV_ZONE_STATE_EMPTY,
SPDK_BDEV_ZONE_STATE_OPEN,
SPDK_BDEV_ZONE_STATE_FULL,
SPDK_BDEV_ZONE_STATE_CLOSED,
SPDK_BDEV_ZONE_STATE_READ_ONLY,
SPDK_BDEV_ZONE_STATE_OFFLINE
};
struct spdk_bdev_zone_info {
uint64_t zone_id;
uint64_t write_pointer;
uint64_t capacity;
enum spdk_bdev_zone_state state;
};
/**
* Get device zone size in logical blocks.
*
@ -74,4 +91,26 @@ uint32_t spdk_bdev_get_max_open_zones(const struct spdk_bdev *bdev);
*/
uint32_t spdk_bdev_get_optimal_open_zones(const struct spdk_bdev *bdev);
/**
* Submit a get_zone_info request to the bdev.
*
* \ingroup bdev_io_submit_functions
*
* \param desc Block device descriptor.
* \param ch I/O channel. Obtained by calling spdk_bdev_get_io_channel().
* \param zone_id First logical block of a zone.
* \param num_zones Number of consecutive zones info to retrieve.
* \param info Pointer to array capable of storing num_zones elements.
* \param cb Called when the request is complete.
* \param cb_arg Argument passed to cb.
*
* \return 0 on success. On success, the callback will always
* be called (even if the request ultimately failed). Return
* negated errno on failure, in which case the callback will not be called.
* * -ENOMEM - spdk_bdev_io buffer cannot be allocated
*/
int spdk_bdev_get_zone_info(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
uint64_t zone_id, size_t num_zones, struct spdk_bdev_zone_info *info,
spdk_bdev_io_completion_cb cb, void *cb_arg);
#endif /* SPDK_BDEV_ZONE_H */

28
lib/bdev/bdev_zone.c
View File

@ -36,6 +36,8 @@
#include "spdk/bdev_zone.h"
#include "spdk/bdev_module.h"
#include "bdev_internal.h"
uint64_t
spdk_bdev_get_zone_size(const struct spdk_bdev *bdev)
{
@ -53,3 +55,29 @@ spdk_bdev_get_optimal_open_zones(const struct spdk_bdev *bdev)
{
return bdev->optimal_open_zones;
}
int
spdk_bdev_get_zone_info(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
uint64_t zone_id, size_t num_zones, struct spdk_bdev_zone_info *info,
spdk_bdev_io_completion_cb cb, void *cb_arg)
{
struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(desc);
struct spdk_bdev_io *bdev_io;
struct spdk_bdev_channel *channel = spdk_io_channel_get_ctx(ch);
bdev_io = spdk_bdev_get_io(channel);
if (!bdev_io) {
return -ENOMEM;
}
bdev_io->internal.ch = channel;
bdev_io->internal.desc = desc;
bdev_io->type = SPDK_BDEV_IO_TYPE_GET_ZONE_INFO;
bdev_io->u.zone_mgmt.zone_id = zone_id;
bdev_io->u.zone_mgmt.num_zones = num_zones;
bdev_io->u.zone_mgmt.buf = info;
spdk_bdev_io_init(bdev_io, bdev, cb_arg, cb);
spdk_bdev_io_submit(bdev_io);
return 0;
}