Edit File: osd_client.h
#ifndef _FS_CEPH_OSD_CLIENT_H #define _FS_CEPH_OSD_CLIENT_H #include <linux/bitrev.h> #include <linux/completion.h> #include <linux/kref.h> #include <linux/mempool.h> #include <linux/rbtree.h> #include <linux/ceph/types.h> #include <linux/ceph/osdmap.h> #include <linux/ceph/messenger.h> #include <linux/ceph/msgpool.h> #include <linux/ceph/auth.h> #include <linux/ceph/pagelist.h> struct ceph_msg; struct ceph_snap_context; struct ceph_osd_request; struct ceph_osd_client; /* * completion callback for async writepages */ typedef void (*ceph_osdc_callback_t)(struct ceph_osd_request *); #define CEPH_HOMELESS_OSD -1 /* a given osd we're communicating with */ struct ceph_osd { atomic_t o_ref; struct ceph_osd_client *o_osdc; int o_osd; int o_incarnation; struct rb_node o_node; struct ceph_connection o_con; struct rb_root o_requests; struct rb_root o_linger_requests; struct rb_root o_backoff_mappings; struct rb_root o_backoffs_by_id; struct list_head o_osd_lru; struct ceph_auth_handshake o_auth; unsigned long lru_ttl; struct list_head o_keepalive_item; struct mutex lock; }; #define CEPH_OSD_SLAB_OPS 2 #define CEPH_OSD_MAX_OPS 16 enum ceph_osd_data_type { CEPH_OSD_DATA_TYPE_NONE = 0, CEPH_OSD_DATA_TYPE_PAGES, CEPH_OSD_DATA_TYPE_PAGELIST, #ifdef CONFIG_BLOCK CEPH_OSD_DATA_TYPE_BIO, #endif /* CONFIG_BLOCK */ }; struct ceph_osd_data { enum ceph_osd_data_type type; union { struct { struct page **pages; u64 length; u32 alignment; bool pages_from_pool; bool own_pages; }; struct ceph_pagelist *pagelist; #ifdef CONFIG_BLOCK struct { struct bio *bio; /* list of bios */ size_t bio_length; /* total in list */ }; #endif /* CONFIG_BLOCK */ }; }; struct ceph_osd_req_op { u16 op; /* CEPH_OSD_OP_* */ u32 flags; /* CEPH_OSD_OP_FLAG_* */ u32 indata_len; /* request */ u32 outdata_len; /* reply */ s32 rval; union { struct ceph_osd_data raw_data_in; struct { u64 offset, length; u64 truncate_size; u32 truncate_seq; struct ceph_osd_data osd_data; } extent; struct { u32 name_len; u32 value_len; __u8 cmp_op; /* CEPH_OSD_CMPXATTR_OP_* */ __u8 cmp_mode; /* CEPH_OSD_CMPXATTR_MODE_* */ struct ceph_osd_data osd_data; } xattr; struct { const char *class_name; const char *method_name; struct ceph_osd_data request_info; struct ceph_osd_data request_data; struct ceph_osd_data response_data; __u8 class_len; __u8 method_len; u32 indata_len; } cls; struct { u64 cookie; __u8 op; /* CEPH_OSD_WATCH_OP_ */ u32 gen; } watch; struct { struct ceph_osd_data request_data; } notify_ack; struct { u64 cookie; struct ceph_osd_data request_data; struct ceph_osd_data response_data; } notify; struct { struct ceph_osd_data response_data; } list_watchers; struct { u64 expected_object_size; u64 expected_write_size; } alloc_hint; }; }; struct ceph_osd_request_target { struct ceph_object_id base_oid; struct ceph_object_locator base_oloc; struct ceph_object_id target_oid; struct ceph_object_locator target_oloc; struct ceph_pg pgid; /* last raw pg we mapped to */ struct ceph_spg spgid; /* last actual spg we mapped to */ u32 pg_num; u32 pg_num_mask; struct ceph_osds acting; struct ceph_osds up; int size; int min_size; bool sort_bitwise; bool recovery_deletes; unsigned int flags; /* CEPH_OSD_FLAG_* */ bool paused; u32 epoch; u32 last_force_resend; int osd; }; /* an in-flight request */ struct ceph_osd_request { u64 r_tid; /* unique for this client */ struct rb_node r_node; struct rb_node r_mc_node; /* map check */ struct ceph_osd *r_osd; struct ceph_osd_request_target r_t; #define r_base_oid r_t.base_oid #define r_base_oloc r_t.base_oloc #define r_flags r_t.flags struct ceph_msg *r_request, *r_reply; u32 r_sent; /* >0 if r_request is sending/sent */ /* request osd ops array */ unsigned int r_num_ops; int r_result; struct ceph_osd_client *r_osdc; struct kref r_kref; bool r_mempool; struct completion r_completion; /* private to osd_client.c */ ceph_osdc_callback_t r_callback; struct list_head r_unsafe_item; struct inode *r_inode; /* for use by callbacks */ void *r_priv; /* ditto */ /* set by submitter */ u64 r_snapid; /* for reads, CEPH_NOSNAP o/w */ struct ceph_snap_context *r_snapc; /* for writes */ struct timespec r_mtime; /* ditto */ u64 r_data_offset; /* ditto */ bool r_linger; /* don't resend on failure */ bool r_abort_on_full; /* return ENOSPC when full */ /* internal */ unsigned long r_stamp; /* jiffies, send or check time */ unsigned long r_start_stamp; /* jiffies */ int r_attempts; u32 r_map_dne_bound; struct ceph_osd_req_op r_ops[]; }; struct ceph_request_redirect { struct ceph_object_locator oloc; }; /* * osd request identifier * * caller name + incarnation# + tid to unique identify this request */ struct ceph_osd_reqid { struct ceph_entity_name name; __le64 tid; __le32 inc; } __packed; struct ceph_blkin_trace_info { __le64 trace_id; __le64 span_id; __le64 parent_span_id; } __packed; typedef void (*rados_watchcb2_t)(void *arg, u64 notify_id, u64 cookie, u64 notifier_id, void *data, size_t data_len); typedef void (*rados_watcherrcb_t)(void *arg, u64 cookie, int err); struct ceph_osd_linger_request { struct ceph_osd_client *osdc; u64 linger_id; bool committed; bool is_watch; /* watch or notify */ struct ceph_osd *osd; struct ceph_osd_request *reg_req; struct ceph_osd_request *ping_req; unsigned long ping_sent; unsigned long watch_valid_thru; struct list_head pending_lworks; struct ceph_osd_request_target t; u32 map_dne_bound; struct timespec mtime; struct kref kref; struct mutex lock; struct rb_node node; /* osd */ struct rb_node osdc_node; /* osdc */ struct rb_node mc_node; /* map check */ struct list_head scan_item; struct completion reg_commit_wait; struct completion notify_finish_wait; int reg_commit_error; int notify_finish_error; int last_error; u32 register_gen; u64 notify_id; rados_watchcb2_t wcb; rados_watcherrcb_t errcb; void *data; struct ceph_pagelist *request_pl; struct page **notify_id_pages; struct page ***preply_pages; size_t *preply_len; }; struct ceph_watch_item { struct ceph_entity_name name; u64 cookie; struct ceph_entity_addr addr; }; struct ceph_spg_mapping { struct rb_node node; struct ceph_spg spgid; struct rb_root backoffs; }; struct ceph_hobject_id { void *key; size_t key_len; void *oid; size_t oid_len; u64 snapid; u32 hash; u8 is_max; void *nspace; size_t nspace_len; s64 pool; /* cache */ u32 hash_reverse_bits; }; static inline void ceph_hoid_build_hash_cache(struct ceph_hobject_id *hoid) { hoid->hash_reverse_bits = bitrev32(hoid->hash); } /* * PG-wide backoff: [begin, end) * per-object backoff: begin == end */ struct ceph_osd_backoff { struct rb_node spg_node; struct rb_node id_node; struct ceph_spg spgid; u64 id; struct ceph_hobject_id *begin; struct ceph_hobject_id *end; }; #define CEPH_LINGER_ID_START 0xffff000000000000ULL struct ceph_osd_client { struct ceph_client *client; struct ceph_osdmap *osdmap; /* current map */ struct rw_semaphore lock; struct rb_root osds; /* osds */ struct list_head osd_lru; /* idle osds */ spinlock_t osd_lru_lock; u32 epoch_barrier; struct ceph_osd homeless_osd; atomic64_t last_tid; /* tid of last request */ u64 last_linger_id; struct rb_root linger_requests; /* lingering requests */ struct rb_root map_checks; struct rb_root linger_map_checks; atomic_t num_requests; atomic_t num_homeless; struct delayed_work timeout_work; struct delayed_work osds_timeout_work; #ifdef CONFIG_DEBUG_FS struct dentry *debugfs_file; #endif mempool_t *req_mempool; struct ceph_msgpool msgpool_op; struct ceph_msgpool msgpool_op_reply; struct workqueue_struct *notify_wq; }; static inline bool ceph_osdmap_flag(struct ceph_osd_client *osdc, int flag) { return osdc->osdmap->flags & flag; } extern int ceph_osdc_setup(void); extern void ceph_osdc_cleanup(void); extern int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client); extern void ceph_osdc_stop(struct ceph_osd_client *osdc); extern void ceph_osdc_handle_reply(struct ceph_osd_client *osdc, struct ceph_msg *msg); extern void ceph_osdc_handle_map(struct ceph_osd_client *osdc, struct ceph_msg *msg); void ceph_osdc_update_epoch_barrier(struct ceph_osd_client *osdc, u32 eb); extern void osd_req_op_init(struct ceph_osd_request *osd_req, unsigned int which, u16 opcode, u32 flags); extern void osd_req_op_raw_data_in_pages(struct ceph_osd_request *, unsigned int which, struct page **pages, u64 length, u32 alignment, bool pages_from_pool, bool own_pages); extern void osd_req_op_extent_init(struct ceph_osd_request *osd_req, unsigned int which, u16 opcode, u64 offset, u64 length, u64 truncate_size, u32 truncate_seq); extern void osd_req_op_extent_update(struct ceph_osd_request *osd_req, unsigned int which, u64 length); extern void osd_req_op_extent_dup_last(struct ceph_osd_request *osd_req, unsigned int which, u64 offset_inc); extern struct ceph_osd_data *osd_req_op_extent_osd_data( struct ceph_osd_request *osd_req, unsigned int which); extern void osd_req_op_extent_osd_data_pages(struct ceph_osd_request *, unsigned int which, struct page **pages, u64 length, u32 alignment, bool pages_from_pool, bool own_pages); extern void osd_req_op_extent_osd_data_pagelist(struct ceph_osd_request *, unsigned int which, struct ceph_pagelist *pagelist); #ifdef CONFIG_BLOCK extern void osd_req_op_extent_osd_data_bio(struct ceph_osd_request *, unsigned int which, struct bio *bio, size_t bio_length); #endif /* CONFIG_BLOCK */ extern void osd_req_op_cls_request_data_pagelist(struct ceph_osd_request *, unsigned int which, struct ceph_pagelist *pagelist); extern void osd_req_op_cls_request_data_pages(struct ceph_osd_request *, unsigned int which, struct page **pages, u64 length, u32 alignment, bool pages_from_pool, bool own_pages); extern void osd_req_op_cls_response_data_pages(struct ceph_osd_request *, unsigned int which, struct page **pages, u64 length, u32 alignment, bool pages_from_pool, bool own_pages); extern void osd_req_op_cls_init(struct ceph_osd_request *osd_req, unsigned int which, u16 opcode, const char *class, const char *method); extern int osd_req_op_xattr_init(struct ceph_osd_request *osd_req, unsigned int which, u16 opcode, const char *name, const void *value, size_t size, u8 cmp_op, u8 cmp_mode); extern void osd_req_op_alloc_hint_init(struct ceph_osd_request *osd_req, unsigned int which, u64 expected_object_size, u64 expected_write_size); extern struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc, struct ceph_snap_context *snapc, unsigned int num_ops, bool use_mempool, gfp_t gfp_flags); int ceph_osdc_alloc_messages(struct ceph_osd_request *req, gfp_t gfp); extern struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *, struct ceph_file_layout *layout, struct ceph_vino vino, u64 offset, u64 *len, unsigned int which, int num_ops, int opcode, int flags, struct ceph_snap_context *snapc, u32 truncate_seq, u64 truncate_size, bool use_mempool); extern void ceph_osdc_get_request(struct ceph_osd_request *req); extern void ceph_osdc_put_request(struct ceph_osd_request *req); extern int ceph_osdc_start_request(struct ceph_osd_client *osdc, struct ceph_osd_request *req, bool nofail); extern void ceph_osdc_cancel_request(struct ceph_osd_request *req); extern int ceph_osdc_wait_request(struct ceph_osd_client *osdc, struct ceph_osd_request *req); extern void ceph_osdc_sync(struct ceph_osd_client *osdc); extern void ceph_osdc_flush_notifies(struct ceph_osd_client *osdc); void ceph_osdc_maybe_request_map(struct ceph_osd_client *osdc); int ceph_osdc_call(struct ceph_osd_client *osdc, struct ceph_object_id *oid, struct ceph_object_locator *oloc, const char *class, const char *method, unsigned int flags, struct page *req_page, size_t req_len, struct page *resp_page, size_t *resp_len); extern int ceph_osdc_readpages(struct ceph_osd_client *osdc, struct ceph_vino vino, struct ceph_file_layout *layout, u64 off, u64 *plen, u32 truncate_seq, u64 truncate_size, struct page **pages, int nr_pages, int page_align); extern int ceph_osdc_writepages(struct ceph_osd_client *osdc, struct ceph_vino vino, struct ceph_file_layout *layout, struct ceph_snap_context *sc, u64 off, u64 len, u32 truncate_seq, u64 truncate_size, struct timespec *mtime, struct page **pages, int nr_pages); /* watch/notify */ struct ceph_osd_linger_request * ceph_osdc_watch(struct ceph_osd_client *osdc, struct ceph_object_id *oid, struct ceph_object_locator *oloc, rados_watchcb2_t wcb, rados_watcherrcb_t errcb, void *data); int ceph_osdc_unwatch(struct ceph_osd_client *osdc, struct ceph_osd_linger_request *lreq); int ceph_osdc_notify_ack(struct ceph_osd_client *osdc, struct ceph_object_id *oid, struct ceph_object_locator *oloc, u64 notify_id, u64 cookie, void *payload, size_t payload_len); int ceph_osdc_notify(struct ceph_osd_client *osdc, struct ceph_object_id *oid, struct ceph_object_locator *oloc, void *payload, size_t payload_len, u32 timeout, struct page ***preply_pages, size_t *preply_len); int ceph_osdc_watch_check(struct ceph_osd_client *osdc, struct ceph_osd_linger_request *lreq); int ceph_osdc_list_watchers(struct ceph_osd_client *osdc, struct ceph_object_id *oid, struct ceph_object_locator *oloc, struct ceph_watch_item **watchers, u32 *num_watchers); #endif