--- /dev/null
+#ifndef _FS_CEPH_OSDMAP_H
+#define _FS_CEPH_OSDMAP_H
+
+#include <linux/rbtree.h>
+#include <linux/ceph/types.h>
+#include <linux/ceph/decode.h>
+#include <linux/ceph/ceph_fs.h>
+#include <linux/crush/crush.h>
+
+/*
+ * The osd map describes the current membership of the osd cluster and
+ * specifies the mapping of objects to placement groups and placement
+ * groups to (sets of) osds. That is, it completely specifies the
+ * (desired) distribution of all data objects in the system at some
+ * point in time.
+ *
+ * Each map version is identified by an epoch, which increases monotonically.
+ *
+ * The map can be updated either via an incremental map (diff) describing
+ * the change between two successive epochs, or as a fully encoded map.
+ */
+struct ceph_pg {
+ uint64_t pool;
+ uint32_t seed;
+};
+
+#define CEPH_POOL_FLAG_HASHPSPOOL 1
+
+struct ceph_pg_pool_info {
+ struct rb_node node;
+ s64 id;
+ u8 type;
+ u8 size;
+ u8 crush_ruleset;
+ u8 object_hash;
+ u32 pg_num, pgp_num;
+ int pg_num_mask, pgp_num_mask;
+ s64 read_tier;
+ s64 write_tier; /* wins for read+write ops */
+ u64 flags;
+ char *name;
+};
+
+static inline bool ceph_can_shift_osds(struct ceph_pg_pool_info *pool)
+{
+ switch (pool->type) {
+ case CEPH_POOL_TYPE_REP:
+ return true;
+ case CEPH_POOL_TYPE_EC:
+ return false;
+ default:
+ BUG_ON(1);
+ }
+}
+
+struct ceph_object_locator {
+ s64 pool;
+};
+
+/*
+ * Maximum supported by kernel client object name length
+ *
+ * (probably outdated: must be >= RBD_MAX_MD_NAME_LEN -- currently 100)
+ */
+#define CEPH_MAX_OID_NAME_LEN 100
+
+struct ceph_object_id {
+ char name[CEPH_MAX_OID_NAME_LEN];
+ int name_len;
+};
+
+struct ceph_pg_mapping {
+ struct rb_node node;
+ struct ceph_pg pgid;
+
+ union {
+ struct {
+ int len;
+ int osds[];
+ } pg_temp;
+ struct {
+ int osd;
+ } primary_temp;
+ };
+};
+
+struct ceph_osdmap {
+ struct ceph_fsid fsid;
+ u32 epoch;
+ u32 mkfs_epoch;
+ struct ceph_timespec created, modified;
+
+ u32 flags; /* CEPH_OSDMAP_* */
+
+ u32 max_osd; /* size of osd_state, _offload, _addr arrays */
+ u8 *osd_state; /* CEPH_OSD_* */
+ u32 *osd_weight; /* 0 = failed, 0x10000 = 100% normal */
+ struct ceph_entity_addr *osd_addr;
+
+ struct rb_root pg_temp;
+ struct rb_root primary_temp;
+
+ u32 *osd_primary_affinity;
+
+ struct rb_root pg_pools;
+ u32 pool_max;
+
+ /* the CRUSH map specifies the mapping of placement groups to
+ * the list of osds that store+replicate them. */
+ struct crush_map *crush;
+
+ struct mutex crush_scratch_mutex;
+ int crush_scratch_ary[CEPH_PG_MAX_SIZE * 3];
+};
+
+static inline void ceph_oid_set_name(struct ceph_object_id *oid,
+ const char *name)
+{
+ int len;
+
+ len = strlen(name);
+ if (len > sizeof(oid->name)) {
+ WARN(1, "ceph_oid_set_name '%s' len %d vs %zu, truncating\n",
+ name, len, sizeof(oid->name));
+ len = sizeof(oid->name);
+ }
+
+ memcpy(oid->name, name, len);
+ oid->name_len = len;
+}
+
+static inline void ceph_oid_copy(struct ceph_object_id *dest,
+ struct ceph_object_id *src)
+{
+ BUG_ON(src->name_len > sizeof(dest->name));
+ memcpy(dest->name, src->name, src->name_len);
+ dest->name_len = src->name_len;
+}
+
+static inline int ceph_osd_exists(struct ceph_osdmap *map, int osd)
+{
+ return osd >= 0 && osd < map->max_osd &&
+ (map->osd_state[osd] & CEPH_OSD_EXISTS);
+}
+
+static inline int ceph_osd_is_up(struct ceph_osdmap *map, int osd)
+{
+ return ceph_osd_exists(map, osd) &&
+ (map->osd_state[osd] & CEPH_OSD_UP);
+}
+
+static inline int ceph_osd_is_down(struct ceph_osdmap *map, int osd)
+{
+ return !ceph_osd_is_up(map, osd);
+}
+
+static inline bool ceph_osdmap_flag(struct ceph_osdmap *map, int flag)
+{
+ return map && (map->flags & flag);
+}
+
+extern char *ceph_osdmap_state_str(char *str, int len, int state);
+extern u32 ceph_get_primary_affinity(struct ceph_osdmap *map, int osd);
+
+static inline struct ceph_entity_addr *ceph_osd_addr(struct ceph_osdmap *map,
+ int osd)
+{
+ if (osd >= map->max_osd)
+ return NULL;
+ return &map->osd_addr[osd];
+}
+
+static inline int ceph_decode_pgid(void **p, void *end, struct ceph_pg *pgid)
+{
+ __u8 version;
+
+ if (!ceph_has_room(p, end, 1 + 8 + 4 + 4)) {
+ pr_warn("incomplete pg encoding\n");
+ return -EINVAL;
+ }
+ version = ceph_decode_8(p);
+ if (version > 1) {
+ pr_warn("do not understand pg encoding %d > 1\n",
+ (int)version);
+ return -EINVAL;
+ }
+
+ pgid->pool = ceph_decode_64(p);
+ pgid->seed = ceph_decode_32(p);
+ *p += 4; /* skip deprecated preferred value */
+
+ return 0;
+}
+
+extern struct ceph_osdmap *ceph_osdmap_decode(void **p, void *end);
+extern struct ceph_osdmap *osdmap_apply_incremental(void **p, void *end,
+ struct ceph_osdmap *map,
+ struct ceph_messenger *msgr);
+extern void ceph_osdmap_destroy(struct ceph_osdmap *map);
+
+/* calculate mapping of a file extent to an object */
+extern int ceph_calc_file_object_mapping(struct ceph_file_layout *layout,
+ u64 off, u64 len,
+ u64 *bno, u64 *oxoff, u64 *oxlen);
+
+/* calculate mapping of object to a placement group */
+extern int ceph_oloc_oid_to_pg(struct ceph_osdmap *osdmap,
+ struct ceph_object_locator *oloc,
+ struct ceph_object_id *oid,
+ struct ceph_pg *pg_out);
+
+extern int ceph_calc_pg_acting(struct ceph_osdmap *osdmap,
+ struct ceph_pg pgid,
+ int *osds, int *primary);
+extern int ceph_calc_pg_primary(struct ceph_osdmap *osdmap,
+ struct ceph_pg pgid);
+
+extern struct ceph_pg_pool_info *ceph_pg_pool_by_id(struct ceph_osdmap *map,
+ u64 id);
+
+extern const char *ceph_pg_pool_name_by_id(struct ceph_osdmap *map, u64 id);
+extern int ceph_pg_poolid_by_name(struct ceph_osdmap *map, const char *name);
+
+#endif
Code Review / kvmfornfv.git / blobdiff