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/*
* This file and its contents are supplied under the terms of the
* Common Development and Distribution License ("CDDL"), version 1.0.
* You may only use this file in accordance with the terms of version
* 1.0 of the CDDL.
*
* A full copy of the text of the CDDL should have accompanied this
* source. A copy of the CDDL is also available via the Internet at
* http://www.illumos.org/license/CDDL.
*/
/*
* Copyright 2017 Nexenta Inc. All rights reserved.
* Copyright 2020 Joyent, Inc.
*/
#ifndef _SYS_DKIOC_FREE_UTIL_H
#define _SYS_DKIOC_FREE_UTIL_H
#include <sys/dkio.h>
#ifdef __cplusplus
extern "C" {
#endif
#define DFL_COPYIN_MAX_EXTS (1024 * 1024)
#define DFL_ISSYNC(dfl) (((dfl)->dfl_flags & DF_WAIT_SYNC) ? B_TRUE : B_FALSE)
/*
* Since dkioc_free_list_t and in general DKIOCFREE use bytes to express
* values instead of blocks, dkioc_free_info_t uses bytes as well for
* consistency.
*/
typedef struct dkioc_free_info {
/* log2(block size) */
uint64_t dfi_bshift;
/* Maximum number of extents in a single request. 0 == no limit */
uint64_t dfi_max_ext;
/*
* Maximum total number of bytes in a single request. 0 == no limit.
* Must by a multiple of 1U << dfi_bshift (e.g. dfi_bshift == 9,
* dfk_max_bytes must be a multiple of 512).
*/
uint64_t dfi_max_bytes;
/*
* Maximum length of an extent. 0 == same as dfi_max_bytes. If > 0,
* must be a multiple of 1U << dfi_shift (the block size) and
* <= dfi_max_bytes.
*/
uint64_t dfi_max_ext_bytes;
/*
* Minimum alignment for starting extent offsets in bytes
* Must be > 0, and a multiple of 1U << dfi_shift.
*
* A possible future extention might be to also express a preferred
* alignment when splitting extents.
*/
uint64_t dfi_align;
} dkioc_free_info_t;
typedef int (*dfl_iter_fn_t)(dkioc_free_list_t *dfl, void *arg, int kmflag);
int dfl_copyin(void *arg, dkioc_free_list_t **out, int ddi_flags, int kmflags);
void dfl_free(dkioc_free_list_t *dfl);
int dfl_iter(dkioc_free_list_t *dfl, const dkioc_free_info_t *dfi, uint64_t len,
dfl_iter_fn_t fn, void *arg, int kmflag);
#ifdef __cplusplus
}
#endif
#endif /* _SYS_DKIOC_FREE_UTIL_H */
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