/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _LINUX_CEPH_STRIPER_H
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#define _LINUX_CEPH_STRIPER_H
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#include <linux/list.h>
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#include <linux/types.h>
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struct ceph_file_layout;
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void ceph_calc_file_object_mapping(struct ceph_file_layout *l,
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u64 off, u64 len,
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u64 *objno, u64 *objoff, u32 *xlen);
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struct ceph_object_extent {
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struct list_head oe_item;
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u64 oe_objno;
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u64 oe_off;
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u64 oe_len;
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};
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static inline void ceph_object_extent_init(struct ceph_object_extent *ex)
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{
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INIT_LIST_HEAD(&ex->oe_item);
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}
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/*
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* Called for each mapped stripe unit.
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*
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* @bytes: number of bytes mapped, i.e. the minimum of the full length
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* requested (file extent length) or the remainder of the stripe
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* unit within an object
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*/
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typedef void (*ceph_object_extent_fn_t)(struct ceph_object_extent *ex,
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u32 bytes, void *arg);
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int ceph_file_to_extents(struct ceph_file_layout *l, u64 off, u64 len,
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struct list_head *object_extents,
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struct ceph_object_extent *alloc_fn(void *arg),
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void *alloc_arg,
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ceph_object_extent_fn_t action_fn,
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void *action_arg);
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int ceph_iterate_extents(struct ceph_file_layout *l, u64 off, u64 len,
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struct list_head *object_extents,
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ceph_object_extent_fn_t action_fn,
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void *action_arg);
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struct ceph_file_extent {
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u64 fe_off;
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u64 fe_len;
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};
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static inline u64 ceph_file_extents_bytes(struct ceph_file_extent *file_extents,
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u32 num_file_extents)
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{
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u64 bytes = 0;
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u32 i;
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for (i = 0; i < num_file_extents; i++)
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bytes += file_extents[i].fe_len;
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return bytes;
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}
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int ceph_extent_to_file(struct ceph_file_layout *l,
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u64 objno, u64 objoff, u64 objlen,
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struct ceph_file_extent **file_extents,
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u32 *num_file_extents);
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u64 ceph_get_num_objects(struct ceph_file_layout *l, u64 size);
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#endif
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