[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_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;
	45
350b1c32 SW	46	struct ceph_connection *r_con_filling_pages;
350b1c32 SW	47
f24e9980 SW	48	struct ceph_msg r_request, r_reply;
	49	int r_result;
	50	int r_flags; /* any additional flags for the osd */
	51	u32 r_sent; /* >0 if r_request is sending/sent */
350b1c32	52	int r_got_reply;
93c20d98	53	int r_num_prealloc_reply;
f24e9980 SW	54
f24e9980 SW	55	struct ceph_osd_client *r_osdc;
415e49a9	56	struct kref r_kref;
f24e9980 SW	57	bool r_mempool;
	58	struct completion r_completion, r_safe_completion;
	59	ceph_osdc_callback_t r_callback, r_safe_callback;
	60	struct ceph_eversion r_reassert_version;
	61	struct list_head r_unsafe_item;
	62
	63	struct inode r_inode; / for use by callbacks */
	64	struct writeback_control r_wbc; / ditto */
	65
	66	char r_oid[40]; /* object name */
	67	int r_oid_len;
	68	unsigned long r_timeout_stamp;
	69	bool r_resend; /* msg send failed, needs retry */
	70
	71	struct ceph_file_layout r_file_layout;
	72	struct ceph_snap_context r_snapc; / snap context for writes */
	73	unsigned r_num_pages; /* size of page array (follows) */
	74	struct page *r_pages; / pages for data payload */
	75	int r_pages_from_pool;
	76	int r_own_pages; /* if true, i own page list */
	77	};
	78
	79	struct ceph_osd_client {
	80	struct ceph_client *client;
	81
	82	struct ceph_osdmap osdmap; / current map */
	83	struct rw_semaphore map_sem;
	84	struct completion map_waiters;
	85	u64 last_requested_map;
	86
	87	struct mutex request_mutex;
	88	struct rb_root osds; /* osds */
	89	u64 timeout_tid; /* tid of timeout triggering rq */
	90	u64 last_tid; /* tid of last request */
	91	struct rb_root requests; /* pending requests */
	92	int num_requests;
	93	struct delayed_work timeout_work;
039934b8	94	#ifdef CONFIG_DEBUG_FS
f24e9980	95	struct dentry *debugfs_file;
039934b8	96	#endif
f24e9980 SW	97
	98	mempool_t *req_mempool;
	99
	100	struct ceph_msgpool msgpool_op;
	101	struct ceph_msgpool msgpool_op_reply;
	102	};
	103
	104	extern int ceph_osdc_init(struct ceph_osd_client *osdc,
	105	struct ceph_client *client);
	106	extern void ceph_osdc_stop(struct ceph_osd_client *osdc);
	107
	108	extern void ceph_osdc_handle_reply(struct ceph_osd_client *osdc,
	109	struct ceph_msg *msg);
	110	extern void ceph_osdc_handle_map(struct ceph_osd_client *osdc,
	111	struct ceph_msg *msg);
	112
	113	extern struct ceph_osd_request ceph_osdc_new_request(struct ceph_osd_client ,
	114	struct ceph_file_layout *layout,
	115	struct ceph_vino vino,
	116	u64 offset, u64 *len, int op, int flags,
	117	struct ceph_snap_context *snapc,
	118	int do_sync, u32 truncate_seq,
	119	u64 truncate_size,
	120	struct timespec *mtime,
	121	bool use_mempool, int num_reply);
	122
	123	static inline void ceph_osdc_get_request(struct ceph_osd_request *req)
	124	{
415e49a9 SW	125	kref_get(&req->r_kref);
	126	}
	127	extern void ceph_osdc_release_request(struct kref *kref);
	128	static inline void ceph_osdc_put_request(struct ceph_osd_request *req)
	129	{
	130	kref_put(&req->r_kref, ceph_osdc_release_request);
f24e9980	131	}
f24e9980 SW	132
	133	extern int ceph_osdc_start_request(struct ceph_osd_client *osdc,
	134	struct ceph_osd_request *req,
	135	bool nofail);
	136	extern int ceph_osdc_wait_request(struct ceph_osd_client *osdc,
	137	struct ceph_osd_request *req);
	138	extern void ceph_osdc_sync(struct ceph_osd_client *osdc);
	139
	140	extern int ceph_osdc_readpages(struct ceph_osd_client *osdc,
	141	struct ceph_vino vino,
	142	struct ceph_file_layout *layout,
	143	u64 off, u64 *plen,
	144	u32 truncate_seq, u64 truncate_size,
	145	struct page **pages, int nr_pages);
	146
	147	extern int ceph_osdc_writepages(struct ceph_osd_client *osdc,
	148	struct ceph_vino vino,
	149	struct ceph_file_layout *layout,
	150	struct ceph_snap_context *sc,
	151	u64 off, u64 len,
	152	u32 truncate_seq, u64 truncate_size,
	153	struct timespec *mtime,
	154	struct page **pages, int nr_pages,
	155	int flags, int do_sync, bool nofail);
	156
	157	#endif
	158