[linux-2.6-block.git] / fs / 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 "types.h"
#include "osdmap.h"
#include "messenger.h"

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 ceph_authorizer *o_authorizer;
	void *o_authorizer_buf, *o_authorizer_reply_buf;
	size_t o_authorizer_buf_len, o_authorizer_reply_buf_len;
};

/* an in-flight request */
struct ceph_osd_request {
	u64             r_tid;              /* unique for this client */
	struct rb_node  r_node;
	struct list_head r_osd_item;
	struct ceph_osd *r_osd;
	struct ceph_pg   r_pgid;

	struct ceph_connection *r_con_filling_pages;

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

	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 */
	struct writeback_control *r_wbc;      /* ditto */

	char              r_oid[40];          /* object name */
	int               r_oid_len;
	unsigned long     r_timeout_stamp;
	bool              r_resend;           /* msg send failed, needs retry */

	struct ceph_file_layout r_file_layout;
	struct ceph_snap_context *r_snapc;    /* snap context for writes */
	unsigned          r_num_pages;        /* size of page array (follows) */
	struct page     **r_pages;            /* pages for data payload */
	int               r_pages_from_pool;
	int               r_own_pages;        /* if true, i own page list */
};

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 */
	u64                    timeout_tid;   /* tid of timeout triggering rq */
	u64                    last_tid;      /* tid of last request */
	struct rb_root         requests;      /* pending requests */
	int                    num_requests;
	struct delayed_work    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;
};

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 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 op, int flags,
				      struct ceph_snap_context *snapc,
				      int do_sync, u32 truncate_seq,
				      u64 truncate_size,
				      struct timespec *mtime,
				      bool use_mempool, int num_reply);

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 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);

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,
				int flags, int do_sync, bool nofail);

#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
	9	#include "types.h"
	10	#include "osdmap.h"
	11	#include "messenger.h"
	12
	13	struct ceph_msg;
	14	struct ceph_snap_context;
	15	struct ceph_osd_request;
	16	struct ceph_osd_client;
4e7a5dcd	17	struct ceph_authorizer;
f24e9980 SW	18
	19	/*
	20	* completion callback for async writepages
	21	*/
	22	typedef void (ceph_osdc_callback_t)(struct ceph_osd_request ,
	23	struct ceph_msg *);
	24
	25	/* a given osd we're communicating with */
	26	struct ceph_osd {
	27	atomic_t o_ref;
	28	struct ceph_osd_client *o_osdc;
	29	int o_osd;
	30	int o_incarnation;
	31	struct rb_node o_node;
	32	struct ceph_connection o_con;
	33	struct list_head o_requests;
4e7a5dcd SW	34	struct ceph_authorizer *o_authorizer;
	35	void o_authorizer_buf, o_authorizer_reply_buf;
	36	size_t o_authorizer_buf_len, o_authorizer_reply_buf_len;
f24e9980 SW	37	};
	38
	39	/* an in-flight request */
	40	struct ceph_osd_request {
	41	u64 r_tid; /* unique for this client */
	42	struct rb_node r_node;
	43	struct list_head r_osd_item;
	44	struct ceph_osd *r_osd;
7740a42f	45	struct ceph_pg r_pgid;
f24e9980	46
350b1c32 SW	47	struct ceph_connection *r_con_filling_pages;
350b1c32 SW	48
f24e9980 SW	49	struct ceph_msg r_request, r_reply;
	50	int r_result;
	51	int r_flags; /* any additional flags for the osd */
	52	u32 r_sent; /* >0 if r_request is sending/sent */
350b1c32	53	int r_got_reply;
93c20d98	54	int r_num_prealloc_reply;
f24e9980 SW	55
f24e9980 SW	56	struct ceph_osd_client *r_osdc;
415e49a9	57	struct kref r_kref;
f24e9980 SW	58	bool r_mempool;
	59	struct completion r_completion, r_safe_completion;
	60	ceph_osdc_callback_t r_callback, r_safe_callback;
	61	struct ceph_eversion r_reassert_version;
	62	struct list_head r_unsafe_item;
	63
	64	struct inode r_inode; / for use by callbacks */
	65	struct writeback_control r_wbc; / ditto */
	66
	67	char r_oid[40]; /* object name */
	68	int r_oid_len;
	69	unsigned long r_timeout_stamp;
	70	bool r_resend; /* msg send failed, needs retry */
	71
	72	struct ceph_file_layout r_file_layout;
	73	struct ceph_snap_context r_snapc; / snap context for writes */
	74	unsigned r_num_pages; /* size of page array (follows) */
	75	struct page *r_pages; / pages for data payload */
	76	int r_pages_from_pool;
	77	int r_own_pages; /* if true, i own page list */
	78	};
	79
	80	struct ceph_osd_client {
	81	struct ceph_client *client;
	82
	83	struct ceph_osdmap osdmap; / current map */
	84	struct rw_semaphore map_sem;
	85	struct completion map_waiters;
	86	u64 last_requested_map;
	87
	88	struct mutex request_mutex;
	89	struct rb_root osds; /* osds */
	90	u64 timeout_tid; /* tid of timeout triggering rq */
	91	u64 last_tid; /* tid of last request */
	92	struct rb_root requests; /* pending requests */
	93	int num_requests;
	94	struct delayed_work timeout_work;
039934b8	95	#ifdef CONFIG_DEBUG_FS
f24e9980	96	struct dentry *debugfs_file;
039934b8	97	#endif
f24e9980 SW	98
	99	mempool_t *req_mempool;
	100
	101	struct ceph_msgpool msgpool_op;
	102	struct ceph_msgpool msgpool_op_reply;
	103	};
	104
	105	extern int ceph_osdc_init(struct ceph_osd_client *osdc,
	106	struct ceph_client *client);
	107	extern void ceph_osdc_stop(struct ceph_osd_client *osdc);
	108
	109	extern void ceph_osdc_handle_reply(struct ceph_osd_client *osdc,
	110	struct ceph_msg *msg);
	111	extern void ceph_osdc_handle_map(struct ceph_osd_client *osdc,
	112	struct ceph_msg *msg);
	113
	114	extern struct ceph_osd_request ceph_osdc_new_request(struct ceph_osd_client ,
	115	struct ceph_file_layout *layout,
	116	struct ceph_vino vino,
	117	u64 offset, u64 *len, int op, int flags,
	118	struct ceph_snap_context *snapc,
	119	int do_sync, u32 truncate_seq,
	120	u64 truncate_size,
	121	struct timespec *mtime,
	122	bool use_mempool, int num_reply);
	123
	124	static inline void ceph_osdc_get_request(struct ceph_osd_request *req)
	125	{
415e49a9 SW	126	kref_get(&req->r_kref);
	127	}
	128	extern void ceph_osdc_release_request(struct kref *kref);
	129	static inline void ceph_osdc_put_request(struct ceph_osd_request *req)
	130	{
	131	kref_put(&req->r_kref, ceph_osdc_release_request);
f24e9980	132	}
f24e9980 SW	133
	134	extern int ceph_osdc_start_request(struct ceph_osd_client *osdc,
	135	struct ceph_osd_request *req,
	136	bool nofail);
	137	extern int ceph_osdc_wait_request(struct ceph_osd_client *osdc,
	138	struct ceph_osd_request *req);
	139	extern void ceph_osdc_sync(struct ceph_osd_client *osdc);
	140
	141	extern int ceph_osdc_readpages(struct ceph_osd_client *osdc,
	142	struct ceph_vino vino,
	143	struct ceph_file_layout *layout,
	144	u64 off, u64 *plen,
	145	u32 truncate_seq, u64 truncate_size,
	146	struct page **pages, int nr_pages);
	147
	148	extern int ceph_osdc_writepages(struct ceph_osd_client *osdc,
	149	struct ceph_vino vino,
	150	struct ceph_file_layout *layout,
	151	struct ceph_snap_context *sc,
	152	u64 off, u64 len,
	153	u32 truncate_seq, u64 truncate_size,
	154	struct timespec *mtime,
	155	struct page **pages, int nr_pages,
	156	int flags, int do_sync, bool nofail);
	157
	158	#endif
	159