72 lines · c
1/* SPDX-License-Identifier: GPL-2.0 */2#ifndef _LINUX_CEPH_STRIPER_H3#define _LINUX_CEPH_STRIPER_H4 5#include <linux/list.h>6#include <linux/types.h>7 8struct ceph_file_layout;9 10void ceph_calc_file_object_mapping(struct ceph_file_layout *l,11 u64 off, u64 len,12 u64 *objno, u64 *objoff, u32 *xlen);13 14struct ceph_object_extent {15 struct list_head oe_item;16 u64 oe_objno;17 u64 oe_off;18 u64 oe_len;19};20 21static inline void ceph_object_extent_init(struct ceph_object_extent *ex)22{23 INIT_LIST_HEAD(&ex->oe_item);24}25 26/*27 * Called for each mapped stripe unit.28 *29 * @bytes: number of bytes mapped, i.e. the minimum of the full length30 * requested (file extent length) or the remainder of the stripe31 * unit within an object32 */33typedef void (*ceph_object_extent_fn_t)(struct ceph_object_extent *ex,34 u32 bytes, void *arg);35 36int ceph_file_to_extents(struct ceph_file_layout *l, u64 off, u64 len,37 struct list_head *object_extents,38 struct ceph_object_extent *alloc_fn(void *arg),39 void *alloc_arg,40 ceph_object_extent_fn_t action_fn,41 void *action_arg);42int ceph_iterate_extents(struct ceph_file_layout *l, u64 off, u64 len,43 struct list_head *object_extents,44 ceph_object_extent_fn_t action_fn,45 void *action_arg);46 47struct ceph_file_extent {48 u64 fe_off;49 u64 fe_len;50};51 52static inline u64 ceph_file_extents_bytes(struct ceph_file_extent *file_extents,53 u32 num_file_extents)54{55 u64 bytes = 0;56 u32 i;57 58 for (i = 0; i < num_file_extents; i++)59 bytes += file_extents[i].fe_len;60 61 return bytes;62}63 64int ceph_extent_to_file(struct ceph_file_layout *l,65 u64 objno, u64 objoff, u64 objlen,66 struct ceph_file_extent **file_extents,67 u32 *num_file_extents);68 69u64 ceph_get_num_objects(struct ceph_file_layout *l, u64 size);70 71#endif72