v4.19.13 snapshot.
diff --git a/include/linux/ceph/osdmap.h b/include/linux/ceph/osdmap.h
new file mode 100644
index 0000000..5675b1f
--- /dev/null
+++ b/include/linux/ceph/osdmap.h
@@ -0,0 +1,309 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#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/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_SPG_NOSHARD -1
+
+struct ceph_spg {
+ struct ceph_pg pgid;
+ s8 shard;
+};
+
+int ceph_pg_compare(const struct ceph_pg *lhs, const struct ceph_pg *rhs);
+int ceph_spg_compare(const struct ceph_spg *lhs, const struct ceph_spg *rhs);
+
+#define CEPH_POOL_FLAG_HASHPSPOOL (1ULL << 0) /* hash pg seed and pool id
+ together */
+#define CEPH_POOL_FLAG_FULL (1ULL << 1) /* pool is full */
+
+struct ceph_pg_pool_info {
+ struct rb_node node;
+ s64 id;
+ u8 type; /* CEPH_POOL_TYPE_* */
+ u8 size;
+ u8 min_size;
+ u8 crush_ruleset;
+ u8 object_hash;
+ u32 last_force_request_resend;
+ 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; /* CEPH_POOL_FLAG_* */
+ char *name;
+
+ bool was_full; /* for handle_one_map() */
+};
+
+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();
+ }
+}
+
+struct ceph_object_locator {
+ s64 pool;
+ struct ceph_string *pool_ns;
+};
+
+static inline void ceph_oloc_init(struct ceph_object_locator *oloc)
+{
+ oloc->pool = -1;
+ oloc->pool_ns = NULL;
+}
+
+static inline bool ceph_oloc_empty(const struct ceph_object_locator *oloc)
+{
+ return oloc->pool == -1;
+}
+
+void ceph_oloc_copy(struct ceph_object_locator *dest,
+ const struct ceph_object_locator *src);
+void ceph_oloc_destroy(struct ceph_object_locator *oloc);
+
+/*
+ * 51-char inline_name is long enough for all cephfs and all but one
+ * rbd requests: <imgname> in "<imgname>.rbd"/"rbd_id.<imgname>" can be
+ * arbitrarily long (~PAGE_SIZE). It's done once during rbd map; all
+ * other rbd requests fit into inline_name.
+ *
+ * Makes ceph_object_id 64 bytes on 64-bit.
+ */
+#define CEPH_OID_INLINE_LEN 52
+
+/*
+ * Both inline and external buffers have space for a NUL-terminator,
+ * which is carried around. It's not required though - RADOS object
+ * names don't have to be NUL-terminated and may contain NULs.
+ */
+struct ceph_object_id {
+ char *name;
+ char inline_name[CEPH_OID_INLINE_LEN];
+ int name_len;
+};
+
+static inline void ceph_oid_init(struct ceph_object_id *oid)
+{
+ oid->name = oid->inline_name;
+ oid->name_len = 0;
+}
+
+#define CEPH_OID_INIT_ONSTACK(oid) \
+ ({ ceph_oid_init(&oid); oid; })
+#define CEPH_DEFINE_OID_ONSTACK(oid) \
+ struct ceph_object_id oid = CEPH_OID_INIT_ONSTACK(oid)
+
+static inline bool ceph_oid_empty(const struct ceph_object_id *oid)
+{
+ return oid->name == oid->inline_name && !oid->name_len;
+}
+
+void ceph_oid_copy(struct ceph_object_id *dest,
+ const struct ceph_object_id *src);
+__printf(2, 3)
+void ceph_oid_printf(struct ceph_object_id *oid, const char *fmt, ...);
+__printf(3, 4)
+int ceph_oid_aprintf(struct ceph_object_id *oid, gfp_t gfp,
+ const char *fmt, ...);
+void ceph_oid_destroy(struct ceph_object_id *oid);
+
+struct ceph_pg_mapping {
+ struct rb_node node;
+ struct ceph_pg pgid;
+
+ union {
+ struct {
+ int len;
+ int osds[];
+ } pg_temp, pg_upmap;
+ struct {
+ int osd;
+ } primary_temp;
+ struct {
+ int len;
+ int from_to[][2];
+ } pg_upmap_items;
+ };
+};
+
+struct ceph_osdmap {
+ struct ceph_fsid fsid;
+ u32 epoch;
+ struct ceph_timespec created, modified;
+
+ u32 flags; /* CEPH_OSDMAP_* */
+
+ u32 max_osd; /* size of osd_state, _offload, _addr arrays */
+ u32 *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;
+
+ /* remap (post-CRUSH, pre-up) */
+ struct rb_root pg_upmap; /* PG := raw set */
+ struct rb_root pg_upmap_items; /* from -> to within raw set */
+
+ 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_workspace_mutex;
+ void *crush_workspace;
+};
+
+static inline bool 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 bool 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 bool ceph_osd_is_down(struct ceph_osdmap *map, int osd)
+{
+ return !ceph_osd_is_up(map, osd);
+}
+
+char *ceph_osdmap_state_str(char *str, int len, u32 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];
+}
+
+#define CEPH_PGID_ENCODING_LEN (1 + 8 + 4 + 4)
+
+static inline int ceph_decode_pgid(void **p, void *end, struct ceph_pg *pgid)
+{
+ __u8 version;
+
+ if (!ceph_has_room(p, end, CEPH_PGID_ENCODING_LEN)) {
+ 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;
+}
+
+struct ceph_osdmap *ceph_osdmap_alloc(void);
+extern struct ceph_osdmap *ceph_osdmap_decode(void **p, void *end);
+struct ceph_osdmap *osdmap_apply_incremental(void **p, void *end,
+ struct ceph_osdmap *map);
+extern void ceph_osdmap_destroy(struct ceph_osdmap *map);
+
+struct ceph_osds {
+ int osds[CEPH_PG_MAX_SIZE];
+ int size;
+ int primary; /* id, NOT index */
+};
+
+static inline void ceph_osds_init(struct ceph_osds *set)
+{
+ set->size = 0;
+ set->primary = -1;
+}
+
+void ceph_osds_copy(struct ceph_osds *dest, const struct ceph_osds *src);
+
+bool ceph_pg_is_split(const struct ceph_pg *pgid, u32 old_pg_num,
+ u32 new_pg_num);
+bool ceph_is_new_interval(const struct ceph_osds *old_acting,
+ const struct ceph_osds *new_acting,
+ const struct ceph_osds *old_up,
+ const struct ceph_osds *new_up,
+ int old_size,
+ int new_size,
+ int old_min_size,
+ int new_min_size,
+ u32 old_pg_num,
+ u32 new_pg_num,
+ bool old_sort_bitwise,
+ bool new_sort_bitwise,
+ bool old_recovery_deletes,
+ bool new_recovery_deletes,
+ const struct ceph_pg *pgid);
+bool ceph_osds_changed(const struct ceph_osds *old_acting,
+ const struct ceph_osds *new_acting,
+ bool any_change);
+
+void __ceph_object_locator_to_pg(struct ceph_pg_pool_info *pi,
+ const struct ceph_object_id *oid,
+ const struct ceph_object_locator *oloc,
+ struct ceph_pg *raw_pgid);
+int ceph_object_locator_to_pg(struct ceph_osdmap *osdmap,
+ const struct ceph_object_id *oid,
+ const struct ceph_object_locator *oloc,
+ struct ceph_pg *raw_pgid);
+
+void ceph_pg_to_up_acting_osds(struct ceph_osdmap *osdmap,
+ struct ceph_pg_pool_info *pi,
+ const struct ceph_pg *raw_pgid,
+ struct ceph_osds *up,
+ struct ceph_osds *acting);
+bool ceph_pg_to_primary_shard(struct ceph_osdmap *osdmap,
+ struct ceph_pg_pool_info *pi,
+ const struct ceph_pg *raw_pgid,
+ struct ceph_spg *spgid);
+int ceph_pg_to_acting_primary(struct ceph_osdmap *osdmap,
+ const struct ceph_pg *raw_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