[linux-2.6-block.git] / include / linux / ceph / osd_client.h

#ifndef _FS_CEPH_OSD_CLIENT_H
#define _FS_CEPH_OSD_CLIENT_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/auth.h>
#include <linux/ceph/pagelist.h>

/* 
 * Maximum object name size 
 * (must be at least as big as RBD_MAX_MD_NAME_LEN -- currently 100) 
 */
#define MAX_OBJ_NAME_SIZE 100

struct ceph_msg;
struct ceph_snap_context;
struct ceph_osd_request;
struct ceph_osd_client;
struct ceph_authorizer;

/*
 * completion callback for async writepages
 */
typedef void (*ceph_osdc_callback_t)(struct ceph_osd_request *,
				     struct ceph_msg *);

/* 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 list_head o_requests;
	struct list_head o_linger_requests;
	struct list_head o_osd_lru;
	struct ceph_auth_handshake o_auth;
	unsigned long lru_ttl;
	int o_marked_for_keepalive;
	struct list_head o_keepalive_item;
};


#define CEPH_OSD_MAX_OP	2

enum ceph_osd_data_type {
	CEPH_OSD_DATA_TYPE_NONE,
	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 payload_len;
	union {
		struct {
			u64 offset, length;
			u64 truncate_size;
			u32 truncate_seq;
			struct ceph_osd_data *osd_data;
		} extent;
		struct {
			const char *class_name;
			const char *method_name;
			const void *request_data;
			struct ceph_osd_data *request_info;
			struct ceph_osd_data *response_data;
			u32 request_data_len;
			__u8 class_len;
			__u8 method_len;
			__u8 argc;
		} cls;
		struct {
			u64 cookie;
			u64 ver;
			u32 prot_ver;
			u32 timeout;
			__u8 flag;
		} watch;
	};
};

/* an in-flight request */
struct ceph_osd_request {
	u64             r_tid;              /* unique for this client */
	struct rb_node  r_node;
	struct list_head r_req_lru_item;
	struct list_head r_osd_item;
	struct list_head r_linger_item;
	struct list_head r_linger_osd;
	struct ceph_osd *r_osd;
	struct ceph_pg   r_pgid;
	int              r_pg_osds[CEPH_PG_MAX_SIZE];
	int              r_num_pg_osds;

	struct ceph_msg  *r_request, *r_reply;
	int               r_flags;     /* any additional flags for the osd */
	u32               r_sent;      /* >0 if r_request is sending/sent */

	/* request osd ops array  */
	unsigned int		r_num_ops;
	struct ceph_osd_req_op	r_ops[CEPH_OSD_MAX_OP];

	/* these are updated on each send */
	__le32           *r_request_osdmap_epoch;
	__le32           *r_request_flags;
	__le64           *r_request_pool;
	void             *r_request_pgid;
	__le32           *r_request_attempts;
	struct ceph_eversion *r_request_reassert_version;

	int               r_result;
	int               r_reply_op_len[CEPH_OSD_MAX_OP];
	s32               r_reply_op_result[CEPH_OSD_MAX_OP];
	int               r_got_reply;
	int		  r_linger;
	int		  r_completed;

	struct ceph_osd_client *r_osdc;
	struct kref       r_kref;
	bool              r_mempool;
	struct completion r_completion, r_safe_completion;
	ceph_osdc_callback_t r_callback, r_safe_callback;
	struct ceph_eversion r_reassert_version;
	struct list_head  r_unsafe_item;

	struct inode *r_inode;         	      /* for use by callbacks */
	void *r_priv;			      /* ditto */

	char              r_oid[MAX_OBJ_NAME_SIZE];          /* object name */
	int               r_oid_len;
	u64               r_snapid;
	unsigned long     r_stamp;            /* send OR check time */

	struct ceph_file_layout r_file_layout;
	struct ceph_snap_context *r_snapc;    /* snap context for writes */

	struct ceph_osd_data r_data_in;
	struct ceph_osd_data r_data_out;
};

struct ceph_osd_event {
	u64 cookie;
	int one_shot;
	struct ceph_osd_client *osdc;
	void (*cb)(u64, u64, u8, void *);
	void *data;
	struct rb_node node;
	struct list_head osd_node;
	struct kref kref;
};

struct ceph_osd_event_work {
	struct work_struct work;
	struct ceph_osd_event *event;
        u64 ver;
        u64 notify_id;
        u8 opcode;
};

struct ceph_osd_client {
	struct ceph_client     *client;

	struct ceph_osdmap     *osdmap;       /* current map */
	struct rw_semaphore    map_sem;
	struct completion      map_waiters;
	u64                    last_requested_map;

	struct mutex           request_mutex;
	struct rb_root         osds;          /* osds */
	struct list_head       osd_lru;       /* idle osds */
	u64                    timeout_tid;   /* tid of timeout triggering rq */
	u64                    last_tid;      /* tid of last request */
	struct rb_root         requests;      /* pending requests */
	struct list_head       req_lru;	      /* in-flight lru */
	struct list_head       req_unsent;    /* unsent/need-resend queue */
	struct list_head       req_notarget;  /* map to no osd */
	struct list_head       req_linger;    /* lingering requests */
	int                    num_requests;
	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;

	spinlock_t		event_lock;
	struct rb_root		event_tree;
	u64			event_count;

	struct workqueue_struct	*notify_wq;
};

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);

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_osd_data(struct ceph_osd_request *osd_req,
					unsigned int which,
					struct ceph_osd_data *osd_data);
extern void osd_req_op_cls_init(struct ceph_osd_request *osd_req,
					unsigned int which, u16 opcode,
					const char *class, const char *method,
					const void *request_data,
					size_t request_data_size);
extern void osd_req_op_cls_response_data(struct ceph_osd_request *osd_req,
					unsigned int which,
					struct ceph_osd_data *response_data);
extern void osd_req_op_watch_init(struct ceph_osd_request *osd_req,
					unsigned int which, u16 opcode,
					u64 cookie, u64 version, int flag);

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);

extern void ceph_osdc_build_request(struct ceph_osd_request *req, u64 off,
				    struct ceph_snap_context *snapc,
				    u64 snap_id,
				    struct timespec *mtime);

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,
				      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_set_request_linger(struct ceph_osd_client *osdc,
					 struct ceph_osd_request *req);
extern void ceph_osdc_unregister_linger_request(struct ceph_osd_client *osdc,
						struct ceph_osd_request *req);

static inline void ceph_osdc_get_request(struct ceph_osd_request *req)
{
	kref_get(&req->r_kref);
}
extern void ceph_osdc_release_request(struct kref *kref);
static inline void ceph_osdc_put_request(struct ceph_osd_request *req)
{
	kref_put(&req->r_kref, ceph_osdc_release_request);
}

extern void ceph_osd_data_pages_init(struct ceph_osd_data *osd_data,
				     struct page **pages, u64 length,
				     u32 alignment, bool pages_from_pool,
				     bool own_pages);
extern void ceph_osd_data_pagelist_init(struct ceph_osd_data *osd_data,
					struct ceph_pagelist *pagelist);
#ifdef CONFIG_BLOCK
extern void ceph_osd_data_bio_init(struct ceph_osd_data *osd_data,
				   struct bio *bio, size_t bio_length);
#endif /* CONFIG_BLOCK */

extern int ceph_osdc_start_request(struct ceph_osd_client *osdc,
				   struct ceph_osd_request *req,
				   bool nofail);
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 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 events */
extern int ceph_osdc_create_event(struct ceph_osd_client *osdc,
				  void (*event_cb)(u64, u64, u8, void *),
				  void *data, struct ceph_osd_event **pevent);
extern void ceph_osdc_cancel_event(struct ceph_osd_event *event);
extern void ceph_osdc_put_event(struct ceph_osd_event *event);
#endif
Commit	Line	Data
f24e9980 SW	1	#ifndef _FS_CEPH_OSD_CLIENT_H
	2	#define _FS_CEPH_OSD_CLIENT_H
	3
	4	#include <linux/completion.h>
415e49a9	5	#include <linux/kref.h>
f24e9980 SW	6	#include <linux/mempool.h>
	7	#include <linux/rbtree.h>
	8
6c4a1915 AE	9	#include <linux/ceph/types.h>
	10	#include <linux/ceph/osdmap.h>
	11	#include <linux/ceph/messenger.h>
	12	#include <linux/ceph/auth.h>
c885837f	13	#include <linux/ceph/pagelist.h>
f24e9980	14
224736d9 SP	15	/*
	16	* Maximum object name size
	17	* (must be at least as big as RBD_MAX_MD_NAME_LEN -- currently 100)
	18	*/
	19	#define MAX_OBJ_NAME_SIZE 100
	20
f24e9980 SW	21	struct ceph_msg;
	22	struct ceph_snap_context;
	23	struct ceph_osd_request;
	24	struct ceph_osd_client;
4e7a5dcd	25	struct ceph_authorizer;
f24e9980 SW	26
	27	/*
	28	* completion callback for async writepages
	29	*/
	30	typedef void (ceph_osdc_callback_t)(struct ceph_osd_request ,
	31	struct ceph_msg *);
	32
	33	/* a given osd we're communicating with */
	34	struct ceph_osd {
	35	atomic_t o_ref;
	36	struct ceph_osd_client *o_osdc;
	37	int o_osd;
	38	int o_incarnation;
	39	struct rb_node o_node;
	40	struct ceph_connection o_con;
	41	struct list_head o_requests;
a40c4f10	42	struct list_head o_linger_requests;
f5a2041b	43	struct list_head o_osd_lru;
6c4a1915	44	struct ceph_auth_handshake o_auth;
f5a2041b	45	unsigned long lru_ttl;
422d2cb8 YS	46	int o_marked_for_keepalive;
422d2cb8 YS	47	struct list_head o_keepalive_item;
f24e9980 SW	48	};
f24e9980 SW	49
1b83bef2	50
79528734	51	#define CEPH_OSD_MAX_OP 2
1b83bef2	52
2ac2b7a6 AE	53	enum ceph_osd_data_type {
	54	CEPH_OSD_DATA_TYPE_NONE,
	55	CEPH_OSD_DATA_TYPE_PAGES,
9a5e6d09	56	CEPH_OSD_DATA_TYPE_PAGELIST,
2ac2b7a6 AE	57	#ifdef CONFIG_BLOCK
	58	CEPH_OSD_DATA_TYPE_BIO,
	59	#endif /* CONFIG_BLOCK */
	60	};
	61
2794a82a	62	struct ceph_osd_data {
2ac2b7a6 AE	63	enum ceph_osd_data_type type;
2ac2b7a6 AE	64	union {
2794a82a AE	65	struct {
2794a82a AE	66	struct page **pages;
e0c59487	67	u64 length;
2794a82a AE	68	u32 alignment;
	69	bool pages_from_pool;
	70	bool own_pages;
	71	};
9a5e6d09	72	struct ceph_pagelist *pagelist;
2794a82a	73	#ifdef CONFIG_BLOCK
fdce58cc AE	74	struct {
	75	struct bio bio; / list of bios */
	76	size_t bio_length; /* total in list */
	77	};
2794a82a AE	78	#endif /* CONFIG_BLOCK */
	79	};
	80	};
	81
79528734 AE	82	struct ceph_osd_req_op {
	83	u16 op; /* CEPH_OSD_OP_* */
	84	u32 payload_len;
	85	union {
	86	struct {
	87	u64 offset, length;
	88	u64 truncate_size;
	89	u32 truncate_seq;
8c042b0d	90	struct ceph_osd_data *osd_data;
79528734 AE	91	} extent;
	92	struct {
	93	const char *class_name;
	94	const char *method_name;
54d50649	95	const void *request_data;
5f562df5	96	struct ceph_osd_data *request_info;
8c042b0d	97	struct ceph_osd_data *response_data;
5f562df5	98	u32 request_data_len;
79528734 AE	99	__u8 class_len;
	100	__u8 method_len;
	101	__u8 argc;
	102	} cls;
	103	struct {
	104	u64 cookie;
	105	u64 ver;
	106	u32 prot_ver;
	107	u32 timeout;
	108	__u8 flag;
	109	} watch;
	110	};
	111	};
	112
f24e9980 SW	113	/* an in-flight request */
	114	struct ceph_osd_request {
	115	u64 r_tid; /* unique for this client */
	116	struct rb_node r_node;
422d2cb8	117	struct list_head r_req_lru_item;
f24e9980	118	struct list_head r_osd_item;
a40c4f10 YS	119	struct list_head r_linger_item;
a40c4f10 YS	120	struct list_head r_linger_osd;
f24e9980	121	struct ceph_osd *r_osd;
5b191d99	122	struct ceph_pg r_pgid;
d85b7056 SW	123	int r_pg_osds[CEPH_PG_MAX_SIZE];
d85b7056 SW	124	int r_num_pg_osds;
f24e9980 SW	125
f24e9980 SW	126	struct ceph_msg r_request, r_reply;
f24e9980 SW	127	int r_flags; /* any additional flags for the osd */
f24e9980 SW	128	u32 r_sent; /* >0 if r_request is sending/sent */
1b83bef2	129
79528734 AE	130	/* request osd ops array */
	131	unsigned int r_num_ops;
	132	struct ceph_osd_req_op r_ops[CEPH_OSD_MAX_OP];
	133
1b83bef2 SW	134	/* these are updated on each send */
	135	__le32 *r_request_osdmap_epoch;
	136	__le32 *r_request_flags;
	137	__le64 *r_request_pool;
	138	void *r_request_pgid;
	139	__le32 *r_request_attempts;
	140	struct ceph_eversion *r_request_reassert_version;
	141
	142	int r_result;
	143	int r_reply_op_len[CEPH_OSD_MAX_OP];
	144	s32 r_reply_op_result[CEPH_OSD_MAX_OP];
350b1c32	145	int r_got_reply;
a40c4f10	146	int r_linger;
0d5af164	147	int r_completed;
f24e9980 SW	148
f24e9980 SW	149	struct ceph_osd_client *r_osdc;
415e49a9	150	struct kref r_kref;
f24e9980 SW	151	bool r_mempool;
	152	struct completion r_completion, r_safe_completion;
	153	ceph_osdc_callback_t r_callback, r_safe_callback;
	154	struct ceph_eversion r_reassert_version;
	155	struct list_head r_unsafe_item;
	156
	157	struct inode r_inode; / for use by callbacks */
3d14c5d2	158	void r_priv; / ditto */
f24e9980	159
224736d9	160	char r_oid[MAX_OBJ_NAME_SIZE]; /* object name */
f24e9980	161	int r_oid_len;
2169aea6	162	u64 r_snapid;
3dd72fc0	163	unsigned long r_stamp; /* send OR check time */
f24e9980 SW	164
	165	struct ceph_file_layout r_file_layout;
	166	struct ceph_snap_context r_snapc; / snap context for writes */
68b4476b	167
0fff87ec AE	168	struct ceph_osd_data r_data_in;
0fff87ec AE	169	struct ceph_osd_data r_data_out;
f24e9980 SW	170	};
f24e9980 SW	171
a40c4f10 YS	172	struct ceph_osd_event {
	173	u64 cookie;
	174	int one_shot;
	175	struct ceph_osd_client *osdc;
	176	void (cb)(u64, u64, u8, void );
	177	void *data;
	178	struct rb_node node;
	179	struct list_head osd_node;
	180	struct kref kref;
a40c4f10 YS	181	};
	182
	183	struct ceph_osd_event_work {
	184	struct work_struct work;
	185	struct ceph_osd_event *event;
	186	u64 ver;
	187	u64 notify_id;
	188	u8 opcode;
	189	};
	190
f24e9980 SW	191	struct ceph_osd_client {
	192	struct ceph_client *client;
	193
	194	struct ceph_osdmap osdmap; / current map */
	195	struct rw_semaphore map_sem;
	196	struct completion map_waiters;
	197	u64 last_requested_map;
	198
	199	struct mutex request_mutex;
	200	struct rb_root osds; /* osds */
f5a2041b	201	struct list_head osd_lru; /* idle osds */
f24e9980 SW	202	u64 timeout_tid; /* tid of timeout triggering rq */
	203	u64 last_tid; /* tid of last request */
	204	struct rb_root requests; /* pending requests */
6f6c7006 SW	205	struct list_head req_lru; /* in-flight lru */
	206	struct list_head req_unsent; /* unsent/need-resend queue */
	207	struct list_head req_notarget; /* map to no osd */
a40c4f10	208	struct list_head req_linger; /* lingering requests */
f24e9980 SW	209	int num_requests;
f24e9980 SW	210	struct delayed_work timeout_work;
f5a2041b	211	struct delayed_work osds_timeout_work;
039934b8	212	#ifdef CONFIG_DEBUG_FS
f24e9980	213	struct dentry *debugfs_file;
039934b8	214	#endif
f24e9980 SW	215
	216	mempool_t *req_mempool;
	217
0d59ab81	218	struct ceph_msgpool msgpool_op;
c16e7869	219	struct ceph_msgpool msgpool_op_reply;
a40c4f10 YS	220
	221	spinlock_t event_lock;
	222	struct rb_root event_tree;
	223	u64 event_count;
	224
	225	struct workqueue_struct *notify_wq;
f24e9980 SW	226	};
	227
	228	extern int ceph_osdc_init(struct ceph_osd_client *osdc,
	229	struct ceph_client *client);
	230	extern void ceph_osdc_stop(struct ceph_osd_client *osdc);
	231
	232	extern void ceph_osdc_handle_reply(struct ceph_osd_client *osdc,
	233	struct ceph_msg *msg);
	234	extern void ceph_osdc_handle_map(struct ceph_osd_client *osdc,
	235	struct ceph_msg *msg);
	236
c99d2d4a AE	237	extern void osd_req_op_extent_init(struct ceph_osd_request *osd_req,
c99d2d4a AE	238	unsigned int which, u16 opcode,
33803f33 AE	239	u64 offset, u64 length,
33803f33 AE	240	u64 truncate_size, u32 truncate_seq);
c99d2d4a AE	241	extern void osd_req_op_extent_update(struct ceph_osd_request *osd_req,
	242	unsigned int which, u64 length);
	243	extern void osd_req_op_extent_osd_data(struct ceph_osd_request *osd_req,
	244	unsigned int which,
8c042b0d	245	struct ceph_osd_data *osd_data);
c99d2d4a AE	246	extern void osd_req_op_cls_init(struct ceph_osd_request *osd_req,
c99d2d4a AE	247	unsigned int which, u16 opcode,
33803f33 AE	248	const char class, const char method,
	249	const void *request_data,
	250	size_t request_data_size);
c99d2d4a AE	251	extern void osd_req_op_cls_response_data(struct ceph_osd_request *osd_req,
c99d2d4a AE	252	unsigned int which,
8c042b0d	253	struct ceph_osd_data *response_data);
c99d2d4a AE	254	extern void osd_req_op_watch_init(struct ceph_osd_request *osd_req,
c99d2d4a AE	255	unsigned int which, u16 opcode,
33803f33 AE	256	u64 cookie, u64 version, int flag);
33803f33 AE	257
3499e8a5	258	extern struct ceph_osd_request ceph_osdc_alloc_request(struct ceph_osd_client osdc,
3499e8a5	259	struct ceph_snap_context *snapc,
acead002	260	unsigned int num_ops,
3499e8a5	261	bool use_mempool,
54a54007	262	gfp_t gfp_flags);
3499e8a5	263
175face2	264	extern void ceph_osdc_build_request(struct ceph_osd_request *req, u64 off,
68b4476b	265	struct ceph_snap_context *snapc,
4d6b250b	266	u64 snap_id,
af77f26c	267	struct timespec *mtime);
3499e8a5	268
f24e9980 SW	269	extern struct ceph_osd_request ceph_osdc_new_request(struct ceph_osd_client ,
	270	struct ceph_file_layout *layout,
	271	struct ceph_vino vino,
acead002	272	u64 offset, u64 *len,
79528734	273	int num_ops, int opcode, int flags,
f24e9980	274	struct ceph_snap_context *snapc,
acead002	275	u32 truncate_seq, u64 truncate_size,
153e5167	276	bool use_mempool);
f24e9980	277
a40c4f10 YS	278	extern void ceph_osdc_set_request_linger(struct ceph_osd_client *osdc,
	279	struct ceph_osd_request *req);
	280	extern void ceph_osdc_unregister_linger_request(struct ceph_osd_client *osdc,
	281	struct ceph_osd_request *req);
	282
f24e9980 SW	283	static inline void ceph_osdc_get_request(struct ceph_osd_request *req)
f24e9980 SW	284	{
415e49a9 SW	285	kref_get(&req->r_kref);
	286	}
	287	extern void ceph_osdc_release_request(struct kref *kref);
	288	static inline void ceph_osdc_put_request(struct ceph_osd_request *req)
	289	{
	290	kref_put(&req->r_kref, ceph_osdc_release_request);
f24e9980	291	}
f24e9980	292
43bfe5de AE	293	extern void ceph_osd_data_pages_init(struct ceph_osd_data *osd_data,
	294	struct page **pages, u64 length,
	295	u32 alignment, bool pages_from_pool,
	296	bool own_pages);
	297	extern void ceph_osd_data_pagelist_init(struct ceph_osd_data *osd_data,
	298	struct ceph_pagelist *pagelist);
	299	#ifdef CONFIG_BLOCK
	300	extern void ceph_osd_data_bio_init(struct ceph_osd_data *osd_data,
	301	struct bio *bio, size_t bio_length);
	302	#endif /* CONFIG_BLOCK */
	303
f24e9980 SW	304	extern int ceph_osdc_start_request(struct ceph_osd_client *osdc,
	305	struct ceph_osd_request *req,
	306	bool nofail);
	307	extern int ceph_osdc_wait_request(struct ceph_osd_client *osdc,
	308	struct ceph_osd_request *req);
	309	extern void ceph_osdc_sync(struct ceph_osd_client *osdc);
	310
	311	extern int ceph_osdc_readpages(struct ceph_osd_client *osdc,
	312	struct ceph_vino vino,
	313	struct ceph_file_layout *layout,
	314	u64 off, u64 *plen,
	315	u32 truncate_seq, u64 truncate_size,
b7495fc2 SW	316	struct page **pages, int nr_pages,
b7495fc2 SW	317	int page_align);
f24e9980 SW	318
	319	extern int ceph_osdc_writepages(struct ceph_osd_client *osdc,
	320	struct ceph_vino vino,
	321	struct ceph_file_layout *layout,
	322	struct ceph_snap_context *sc,
	323	u64 off, u64 len,
	324	u32 truncate_seq, u64 truncate_size,
	325	struct timespec *mtime,
24808826	326	struct page **pages, int nr_pages);
f24e9980	327
a40c4f10 YS	328	/* watch/notify events */
	329	extern int ceph_osdc_create_event(struct ceph_osd_client *osdc,
	330	void (event_cb)(u64, u64, u8, void ),
3c663bbd	331	void data, struct ceph_osd_event *pevent);
a40c4f10	332	extern void ceph_osdc_cancel_event(struct ceph_osd_event *event);
a40c4f10	333	extern void ceph_osdc_put_event(struct ceph_osd_event *event);
f24e9980 SW	334	#endif
f24e9980 SW	335