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71 lines
1.7 KiB
71 lines
1.7 KiB
/* 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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