root/include/linux/ceph/osdmap.h

INCLUDED FROM

DEFINITIONS

1. ceph_can_shift_osds
2. ceph_oloc_init
3. ceph_oloc_empty
4. ceph_oid_init
5. ceph_oid_empty
6. __printf
7. ceph_osd_exists
8. ceph_osd_is_up
9. ceph_osd_is_down
10. ceph_osd_addr
11. ceph_decode_pgid
12. ceph_osds_init

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _FS_CEPH_OSDMAP_H
   3 #define _FS_CEPH_OSDMAP_H
   4 
   5 #include <linux/rbtree.h>
   6 #include <linux/ceph/types.h>
   7 #include <linux/ceph/decode.h>
   8 #include <linux/crush/crush.h>
   9 
  10 /*
  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
  15  * point in time.
  16  *
  17  * Each map version is identified by an epoch, which increases monotonically.
  18  *
  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.
  21  */
  22 struct ceph_pg {
  23         uint64_t pool;
  24         uint32_t seed;
  25 };
  26 
  27 #define CEPH_SPG_NOSHARD        -1
  28 
  29 struct ceph_spg {
  30         struct ceph_pg pgid;
  31         s8 shard;
  32 };
  33 
  34 int ceph_pg_compare(const struct ceph_pg *lhs, const struct ceph_pg *rhs);
  35 int ceph_spg_compare(const struct ceph_spg *lhs, const struct ceph_spg *rhs);
  36 
  37 #define CEPH_POOL_FLAG_HASHPSPOOL       (1ULL << 0) /* hash pg seed and pool id
  38                                                        together */
  39 #define CEPH_POOL_FLAG_FULL             (1ULL << 1) /* pool is full */
  40 #define CEPH_POOL_FLAG_FULL_QUOTA       (1ULL << 10) /* pool ran out of quota,
  41                                                         will set FULL too */
  42 #define CEPH_POOL_FLAG_NEARFULL         (1ULL << 11) /* pool is nearfull */
  43 
  44 struct ceph_pg_pool_info {
  45         struct rb_node node;
  46         s64 id;
  47         u8 type; /* CEPH_POOL_TYPE_* */
  48         u8 size;
  49         u8 min_size;
  50         u8 crush_ruleset;
  51         u8 object_hash;
  52         u32 last_force_request_resend;
  53         u32 pg_num, pgp_num;
  54         int pg_num_mask, pgp_num_mask;
  55         s64 read_tier;
  56         s64 write_tier; /* wins for read+write ops */
  57         u64 flags; /* CEPH_POOL_FLAG_* */
  58         char *name;
  59 
  60         bool was_full;  /* for handle_one_map() */
  61 };
  62 
  63 static inline bool ceph_can_shift_osds(struct ceph_pg_pool_info *pool)
  64 {
  65         switch (pool->type) {
  66         case CEPH_POOL_TYPE_REP:
  67                 return true;
  68         case CEPH_POOL_TYPE_EC:
  69                 return false;
  70         default:
  71                 BUG();
  72         }
  73 }
  74 
  75 struct ceph_object_locator {
  76         s64 pool;
  77         struct ceph_string *pool_ns;
  78 };
  79 
  80 static inline void ceph_oloc_init(struct ceph_object_locator *oloc)
  81 {
  82         oloc->pool = -1;
  83         oloc->pool_ns = NULL;
  84 }
  85 
  86 static inline bool ceph_oloc_empty(const struct ceph_object_locator *oloc)
  87 {
  88         return oloc->pool == -1;
  89 }
  90 
  91 void ceph_oloc_copy(struct ceph_object_locator *dest,
  92                     const struct ceph_object_locator *src);
  93 void ceph_oloc_destroy(struct ceph_object_locator *oloc);
  94 
  95 /*
  96  * 51-char inline_name is long enough for all cephfs and all but one
  97  * rbd requests: <imgname> in "<imgname>.rbd"/"rbd_id.<imgname>" can be
  98  * arbitrarily long (~PAGE_SIZE).  It's done once during rbd map; all
  99  * other rbd requests fit into inline_name.
 100  *
 101  * Makes ceph_object_id 64 bytes on 64-bit.
 102  */
 103 #define CEPH_OID_INLINE_LEN 52
 104 
 105 /*
 106  * Both inline and external buffers have space for a NUL-terminator,
 107  * which is carried around.  It's not required though - RADOS object
 108  * names don't have to be NUL-terminated and may contain NULs.
 109  */
 110 struct ceph_object_id {
 111         char *name;
 112         char inline_name[CEPH_OID_INLINE_LEN];
 113         int name_len;
 114 };
 115 
 116 #define __CEPH_OID_INITIALIZER(oid) { .name = (oid).inline_name }
 117 
 118 #define CEPH_DEFINE_OID_ONSTACK(oid)                            \
 119         struct ceph_object_id oid = __CEPH_OID_INITIALIZER(oid)
 120 
 121 static inline void ceph_oid_init(struct ceph_object_id *oid)
 122 {
 123         *oid = (struct ceph_object_id) __CEPH_OID_INITIALIZER(*oid);
 124 }
 125 
 126 static inline bool ceph_oid_empty(const struct ceph_object_id *oid)
 127 {
 128         return oid->name == oid->inline_name && !oid->name_len;
 129 }
 130 
 131 void ceph_oid_copy(struct ceph_object_id *dest,
 132                    const struct ceph_object_id *src);
 133 __printf(2, 3)
 134 void ceph_oid_printf(struct ceph_object_id *oid, const char *fmt, ...);
 135 __printf(3, 4)
 136 int ceph_oid_aprintf(struct ceph_object_id *oid, gfp_t gfp,
 137                      const char *fmt, ...);
 138 void ceph_oid_destroy(struct ceph_object_id *oid);
 139 
 140 struct ceph_pg_mapping {
 141         struct rb_node node;
 142         struct ceph_pg pgid;
 143 
 144         union {
 145                 struct {
 146                         int len;
 147                         int osds[];
 148                 } pg_temp, pg_upmap;
 149                 struct {
 150                         int osd;
 151                 } primary_temp;
 152                 struct {
 153                         int len;
 154                         int from_to[][2];
 155                 } pg_upmap_items;
 156         };
 157 };
 158 
 159 struct ceph_osdmap {
 160         struct ceph_fsid fsid;
 161         u32 epoch;
 162         struct ceph_timespec created, modified;
 163 
 164         u32 flags;         /* CEPH_OSDMAP_* */
 165 
 166         u32 max_osd;       /* size of osd_state, _offload, _addr arrays */
 167         u32 *osd_state;    /* CEPH_OSD_* */
 168         u32 *osd_weight;   /* 0 = failed, 0x10000 = 100% normal */
 169         struct ceph_entity_addr *osd_addr;
 170 
 171         struct rb_root pg_temp;
 172         struct rb_root primary_temp;
 173 
 174         /* remap (post-CRUSH, pre-up) */
 175         struct rb_root pg_upmap;        /* PG := raw set */
 176         struct rb_root pg_upmap_items;  /* from -> to within raw set */
 177 
 178         u32 *osd_primary_affinity;
 179 
 180         struct rb_root pg_pools;
 181         u32 pool_max;
 182 
 183         /* the CRUSH map specifies the mapping of placement groups to
 184          * the list of osds that store+replicate them. */
 185         struct crush_map *crush;
 186 
 187         struct mutex crush_workspace_mutex;
 188         void *crush_workspace;
 189 };
 190 
 191 static inline bool ceph_osd_exists(struct ceph_osdmap *map, int osd)
 192 {
 193         return osd >= 0 && osd < map->max_osd &&
 194                (map->osd_state[osd] & CEPH_OSD_EXISTS);
 195 }
 196 
 197 static inline bool ceph_osd_is_up(struct ceph_osdmap *map, int osd)
 198 {
 199         return ceph_osd_exists(map, osd) &&
 200                (map->osd_state[osd] & CEPH_OSD_UP);
 201 }
 202 
 203 static inline bool ceph_osd_is_down(struct ceph_osdmap *map, int osd)
 204 {
 205         return !ceph_osd_is_up(map, osd);
 206 }
 207 
 208 char *ceph_osdmap_state_str(char *str, int len, u32 state);
 209 extern u32 ceph_get_primary_affinity(struct ceph_osdmap *map, int osd);
 210 
 211 static inline struct ceph_entity_addr *ceph_osd_addr(struct ceph_osdmap *map,
 212                                                      int osd)
 213 {
 214         if (osd >= map->max_osd)
 215                 return NULL;
 216         return &map->osd_addr[osd];
 217 }
 218 
 219 #define CEPH_PGID_ENCODING_LEN          (1 + 8 + 4 + 4)
 220 
 221 static inline int ceph_decode_pgid(void **p, void *end, struct ceph_pg *pgid)
 222 {
 223         __u8 version;
 224 
 225         if (!ceph_has_room(p, end, CEPH_PGID_ENCODING_LEN)) {
 226                 pr_warn("incomplete pg encoding\n");
 227                 return -EINVAL;
 228         }
 229         version = ceph_decode_8(p);
 230         if (version > 1) {
 231                 pr_warn("do not understand pg encoding %d > 1\n",
 232                         (int)version);
 233                 return -EINVAL;
 234         }
 235 
 236         pgid->pool = ceph_decode_64(p);
 237         pgid->seed = ceph_decode_32(p);
 238         *p += 4;        /* skip deprecated preferred value */
 239 
 240         return 0;
 241 }
 242 
 243 struct ceph_osdmap *ceph_osdmap_alloc(void);
 244 extern struct ceph_osdmap *ceph_osdmap_decode(void **p, void *end);
 245 struct ceph_osdmap *osdmap_apply_incremental(void **p, void *end,
 246                                              struct ceph_osdmap *map);
 247 extern void ceph_osdmap_destroy(struct ceph_osdmap *map);
 248 
 249 struct ceph_osds {
 250         int osds[CEPH_PG_MAX_SIZE];
 251         int size;
 252         int primary; /* id, NOT index */
 253 };
 254 
 255 static inline void ceph_osds_init(struct ceph_osds *set)
 256 {
 257         set->size = 0;
 258         set->primary = -1;
 259 }
 260 
 261 void ceph_osds_copy(struct ceph_osds *dest, const struct ceph_osds *src);
 262 
 263 bool ceph_pg_is_split(const struct ceph_pg *pgid, u32 old_pg_num,
 264                       u32 new_pg_num);
 265 bool ceph_is_new_interval(const struct ceph_osds *old_acting,
 266                           const struct ceph_osds *new_acting,
 267                           const struct ceph_osds *old_up,
 268                           const struct ceph_osds *new_up,
 269                           int old_size,
 270                           int new_size,
 271                           int old_min_size,
 272                           int new_min_size,
 273                           u32 old_pg_num,
 274                           u32 new_pg_num,
 275                           bool old_sort_bitwise,
 276                           bool new_sort_bitwise,
 277                           bool old_recovery_deletes,
 278                           bool new_recovery_deletes,
 279                           const struct ceph_pg *pgid);
 280 bool ceph_osds_changed(const struct ceph_osds *old_acting,
 281                        const struct ceph_osds *new_acting,
 282                        bool any_change);
 283 
 284 void __ceph_object_locator_to_pg(struct ceph_pg_pool_info *pi,
 285                                  const struct ceph_object_id *oid,
 286                                  const struct ceph_object_locator *oloc,
 287                                  struct ceph_pg *raw_pgid);
 288 int ceph_object_locator_to_pg(struct ceph_osdmap *osdmap,
 289                               const struct ceph_object_id *oid,
 290                               const struct ceph_object_locator *oloc,
 291                               struct ceph_pg *raw_pgid);
 292 
 293 void ceph_pg_to_up_acting_osds(struct ceph_osdmap *osdmap,
 294                                struct ceph_pg_pool_info *pi,
 295                                const struct ceph_pg *raw_pgid,
 296                                struct ceph_osds *up,
 297                                struct ceph_osds *acting);
 298 bool ceph_pg_to_primary_shard(struct ceph_osdmap *osdmap,
 299                               struct ceph_pg_pool_info *pi,
 300                               const struct ceph_pg *raw_pgid,
 301                               struct ceph_spg *spgid);
 302 int ceph_pg_to_acting_primary(struct ceph_osdmap *osdmap,
 303                               const struct ceph_pg *raw_pgid);
 304 
 305 extern struct ceph_pg_pool_info *ceph_pg_pool_by_id(struct ceph_osdmap *map,
 306                                                     u64 id);
 307 
 308 extern const char *ceph_pg_pool_name_by_id(struct ceph_osdmap *map, u64 id);
 309 extern int ceph_pg_poolid_by_name(struct ceph_osdmap *map, const char *name);
 310 u64 ceph_pg_pool_flags(struct ceph_osdmap *map, u64 id);
 311 
 312 #endif