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#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
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