Sage Weil | f24e998 | 2009-10-06 11:31:10 -0700 | [diff] [blame] | 1 | #ifndef _FS_CEPH_OSDMAP_H |
| 2 | #define _FS_CEPH_OSDMAP_H |
| 3 | |
| 4 | #include <linux/rbtree.h> |
| 5 | #include "types.h" |
| 6 | #include "ceph_fs.h" |
| 7 | #include "crush/crush.h" |
| 8 | |
| 9 | /* |
| 10 | * The osd map describes the current membership of the osd cluster and |
| 11 | * specifies the mapping of objects to placement groups and placement |
| 12 | * groups to (sets of) osds. That is, it completely specifies the |
| 13 | * (desired) distribution of all data objects in the system at some |
| 14 | * point in time. |
| 15 | * |
| 16 | * Each map version is identified by an epoch, which increases monotonically. |
| 17 | * |
| 18 | * The map can be updated either via an incremental map (diff) describing |
| 19 | * the change between two successive epochs, or as a fully encoded map. |
| 20 | */ |
| 21 | struct ceph_pg_pool_info { |
Sage Weil | 4fc51be | 2010-02-16 15:55:03 -0800 | [diff] [blame] | 22 | struct rb_node node; |
| 23 | int id; |
Sage Weil | f24e998 | 2009-10-06 11:31:10 -0700 | [diff] [blame] | 24 | struct ceph_pg_pool v; |
| 25 | int pg_num_mask, pgp_num_mask, lpg_num_mask, lpgp_num_mask; |
Sage Weil | 2844a76 | 2010-04-09 15:46:42 -0700 | [diff] [blame^] | 26 | char *name; |
Sage Weil | f24e998 | 2009-10-06 11:31:10 -0700 | [diff] [blame] | 27 | }; |
| 28 | |
| 29 | struct ceph_pg_mapping { |
| 30 | struct rb_node node; |
Sage Weil | 5104212 | 2009-11-04 11:39:12 -0800 | [diff] [blame] | 31 | struct ceph_pg pgid; |
Sage Weil | f24e998 | 2009-10-06 11:31:10 -0700 | [diff] [blame] | 32 | int len; |
| 33 | int osds[]; |
| 34 | }; |
| 35 | |
| 36 | struct ceph_osdmap { |
| 37 | struct ceph_fsid fsid; |
| 38 | u32 epoch; |
| 39 | u32 mkfs_epoch; |
| 40 | struct ceph_timespec created, modified; |
| 41 | |
| 42 | u32 flags; /* CEPH_OSDMAP_* */ |
| 43 | |
| 44 | u32 max_osd; /* size of osd_state, _offload, _addr arrays */ |
| 45 | u8 *osd_state; /* CEPH_OSD_* */ |
| 46 | u32 *osd_weight; /* 0 = failed, 0x10000 = 100% normal */ |
| 47 | struct ceph_entity_addr *osd_addr; |
| 48 | |
| 49 | struct rb_root pg_temp; |
Sage Weil | 4fc51be | 2010-02-16 15:55:03 -0800 | [diff] [blame] | 50 | struct rb_root pg_pools; |
| 51 | u32 pool_max; |
Sage Weil | f24e998 | 2009-10-06 11:31:10 -0700 | [diff] [blame] | 52 | |
| 53 | /* the CRUSH map specifies the mapping of placement groups to |
| 54 | * the list of osds that store+replicate them. */ |
| 55 | struct crush_map *crush; |
| 56 | }; |
| 57 | |
| 58 | /* |
| 59 | * file layout helpers |
| 60 | */ |
| 61 | #define ceph_file_layout_su(l) ((__s32)le32_to_cpu((l).fl_stripe_unit)) |
| 62 | #define ceph_file_layout_stripe_count(l) \ |
| 63 | ((__s32)le32_to_cpu((l).fl_stripe_count)) |
| 64 | #define ceph_file_layout_object_size(l) ((__s32)le32_to_cpu((l).fl_object_size)) |
| 65 | #define ceph_file_layout_cas_hash(l) ((__s32)le32_to_cpu((l).fl_cas_hash)) |
| 66 | #define ceph_file_layout_object_su(l) \ |
| 67 | ((__s32)le32_to_cpu((l).fl_object_stripe_unit)) |
| 68 | #define ceph_file_layout_pg_preferred(l) \ |
| 69 | ((__s32)le32_to_cpu((l).fl_pg_preferred)) |
| 70 | #define ceph_file_layout_pg_pool(l) \ |
| 71 | ((__s32)le32_to_cpu((l).fl_pg_pool)) |
| 72 | |
| 73 | static inline unsigned ceph_file_layout_stripe_width(struct ceph_file_layout *l) |
| 74 | { |
| 75 | return le32_to_cpu(l->fl_stripe_unit) * |
| 76 | le32_to_cpu(l->fl_stripe_count); |
| 77 | } |
| 78 | |
| 79 | /* "period" == bytes before i start on a new set of objects */ |
| 80 | static inline unsigned ceph_file_layout_period(struct ceph_file_layout *l) |
| 81 | { |
| 82 | return le32_to_cpu(l->fl_object_size) * |
| 83 | le32_to_cpu(l->fl_stripe_count); |
| 84 | } |
| 85 | |
| 86 | |
| 87 | static inline int ceph_osd_is_up(struct ceph_osdmap *map, int osd) |
| 88 | { |
| 89 | return (osd < map->max_osd) && (map->osd_state[osd] & CEPH_OSD_UP); |
| 90 | } |
| 91 | |
| 92 | static inline bool ceph_osdmap_flag(struct ceph_osdmap *map, int flag) |
| 93 | { |
| 94 | return map && (map->flags & flag); |
| 95 | } |
| 96 | |
| 97 | extern char *ceph_osdmap_state_str(char *str, int len, int state); |
| 98 | |
| 99 | static inline struct ceph_entity_addr *ceph_osd_addr(struct ceph_osdmap *map, |
| 100 | int osd) |
| 101 | { |
| 102 | if (osd >= map->max_osd) |
| 103 | return NULL; |
| 104 | return &map->osd_addr[osd]; |
| 105 | } |
| 106 | |
| 107 | extern struct ceph_osdmap *osdmap_decode(void **p, void *end); |
| 108 | extern struct ceph_osdmap *osdmap_apply_incremental(void **p, void *end, |
| 109 | struct ceph_osdmap *map, |
| 110 | struct ceph_messenger *msgr); |
| 111 | extern void ceph_osdmap_destroy(struct ceph_osdmap *map); |
| 112 | |
| 113 | /* calculate mapping of a file extent to an object */ |
| 114 | extern void ceph_calc_file_object_mapping(struct ceph_file_layout *layout, |
| 115 | u64 off, u64 *plen, |
| 116 | u64 *bno, u64 *oxoff, u64 *oxlen); |
| 117 | |
| 118 | /* calculate mapping of object to a placement group */ |
| 119 | extern int ceph_calc_object_layout(struct ceph_object_layout *ol, |
| 120 | const char *oid, |
| 121 | struct ceph_file_layout *fl, |
| 122 | struct ceph_osdmap *osdmap); |
Sage Weil | 5104212 | 2009-11-04 11:39:12 -0800 | [diff] [blame] | 123 | extern int ceph_calc_pg_primary(struct ceph_osdmap *osdmap, |
| 124 | struct ceph_pg pgid); |
Sage Weil | f24e998 | 2009-10-06 11:31:10 -0700 | [diff] [blame] | 125 | |
| 126 | #endif |