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git.proxmox.com Git - mirror_ubuntu-artful-kernel.git/blob - include/linux/ceph/osdmap.h
1 #ifndef _FS_CEPH_OSDMAP_H
2 #define _FS_CEPH_OSDMAP_H
4 #include <linux/rbtree.h>
5 #include <linux/ceph/types.h>
6 #include <linux/ceph/decode.h>
7 #include <linux/ceph/ceph_fs.h>
8 #include <linux/crush/crush.h>
11 * The osd map describes the current membership of the osd cluster and
12 * specifies the mapping of objects to placement groups and placement
13 * groups to (sets of) osds. That is, it completely specifies the
14 * (desired) distribution of all data objects in the system at some
17 * Each map version is identified by an epoch, which increases monotonically.
19 * The map can be updated either via an incremental map (diff) describing
20 * the change between two successive epochs, or as a fully encoded map.
27 #define CEPH_POOL_FLAG_HASHPSPOOL 1
29 struct ceph_pg_pool_info
{
37 int pg_num_mask
, pgp_num_mask
;
42 struct ceph_object_locator
{
47 struct ceph_pg_mapping
{
55 struct ceph_fsid fsid
;
58 struct ceph_timespec created
, modified
;
60 u32 flags
; /* CEPH_OSDMAP_* */
62 u32 max_osd
; /* size of osd_state, _offload, _addr arrays */
63 u8
*osd_state
; /* CEPH_OSD_* */
64 u32
*osd_weight
; /* 0 = failed, 0x10000 = 100% normal */
65 struct ceph_entity_addr
*osd_addr
;
67 struct rb_root pg_temp
;
68 struct rb_root pg_pools
;
71 /* the CRUSH map specifies the mapping of placement groups to
72 * the list of osds that store+replicate them. */
73 struct crush_map
*crush
;
79 #define ceph_file_layout_su(l) ((__s32)le32_to_cpu((l).fl_stripe_unit))
80 #define ceph_file_layout_stripe_count(l) \
81 ((__s32)le32_to_cpu((l).fl_stripe_count))
82 #define ceph_file_layout_object_size(l) ((__s32)le32_to_cpu((l).fl_object_size))
83 #define ceph_file_layout_cas_hash(l) ((__s32)le32_to_cpu((l).fl_cas_hash))
84 #define ceph_file_layout_object_su(l) \
85 ((__s32)le32_to_cpu((l).fl_object_stripe_unit))
86 #define ceph_file_layout_pg_pool(l) \
87 ((__s32)le32_to_cpu((l).fl_pg_pool))
89 static inline unsigned ceph_file_layout_stripe_width(struct ceph_file_layout
*l
)
91 return le32_to_cpu(l
->fl_stripe_unit
) *
92 le32_to_cpu(l
->fl_stripe_count
);
95 /* "period" == bytes before i start on a new set of objects */
96 static inline unsigned ceph_file_layout_period(struct ceph_file_layout
*l
)
98 return le32_to_cpu(l
->fl_object_size
) *
99 le32_to_cpu(l
->fl_stripe_count
);
103 static inline int ceph_osd_is_up(struct ceph_osdmap
*map
, int osd
)
105 return (osd
< map
->max_osd
) && (map
->osd_state
[osd
] & CEPH_OSD_UP
);
108 static inline bool ceph_osdmap_flag(struct ceph_osdmap
*map
, int flag
)
110 return map
&& (map
->flags
& flag
);
113 extern char *ceph_osdmap_state_str(char *str
, int len
, int state
);
115 static inline struct ceph_entity_addr
*ceph_osd_addr(struct ceph_osdmap
*map
,
118 if (osd
>= map
->max_osd
)
120 return &map
->osd_addr
[osd
];
123 static inline int ceph_decode_pgid(void **p
, void *end
, struct ceph_pg
*pgid
)
127 if (!ceph_has_room(p
, end
, 1 + 8 + 4 + 4)) {
128 pr_warning("incomplete pg encoding");
132 version
= ceph_decode_8(p
);
134 pr_warning("do not understand pg encoding %d > 1",
139 pgid
->pool
= ceph_decode_64(p
);
140 pgid
->seed
= ceph_decode_32(p
);
141 *p
+= 4; /* skip deprecated preferred value */
146 extern struct ceph_osdmap
*osdmap_decode(void **p
, void *end
);
147 extern struct ceph_osdmap
*osdmap_apply_incremental(void **p
, void *end
,
148 struct ceph_osdmap
*map
,
149 struct ceph_messenger
*msgr
);
150 extern void ceph_osdmap_destroy(struct ceph_osdmap
*map
);
152 /* calculate mapping of a file extent to an object */
153 extern int ceph_calc_file_object_mapping(struct ceph_file_layout
*layout
,
155 u64
*bno
, u64
*oxoff
, u64
*oxlen
);
157 /* calculate mapping of object to a placement group */
158 extern int ceph_calc_ceph_pg(struct ceph_pg
*pg
, const char *oid
,
159 struct ceph_osdmap
*osdmap
, uint64_t pool
);
160 extern int ceph_calc_pg_acting(struct ceph_osdmap
*osdmap
,
163 extern int ceph_calc_pg_primary(struct ceph_osdmap
*osdmap
,
164 struct ceph_pg pgid
);
166 extern const char *ceph_pg_pool_name_by_id(struct ceph_osdmap
*map
, u64 id
);
167 extern int ceph_pg_poolid_by_name(struct ceph_osdmap
*map
, const char *name
);