[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;
struct ceph_pagelist;

/*
 * 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_osd_lru;
	struct ceph_authorizer *o_authorizer;
	void *o_authorizer_buf, *o_authorizer_reply_buf;
	size_t o_authorizer_buf_len, o_authorizer_reply_buf_len;
	unsigned long lru_ttl;
	int o_marked_for_keepalive;
	struct list_head o_keepalive_item;
};

/* 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 ceph_osd *r_osd;
	struct ceph_pg   r_pgid;
	int              r_pg_osds[CEPH_PG_MAX_SIZE];
	int              r_num_pg_osds;

	struct ceph_connection *r_con_filling_msg;

	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;

	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 */

	char              r_oid[40];          /* object name */
	int               r_oid_len;
	unsigned long     r_stamp;            /* send OR check time */
	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 */
#ifdef CONFIG_BLOCK
	struct bio       *r_bio;	      /* instead of pages */
#endif

	struct ceph_pagelist *r_trail;	      /* trailing part of the data */
};

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;	      /* pending requests lru */
	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;
};

struct ceph_osd_req_op {
	u16 op;           /* CEPH_OSD_OP_* */
	u32 flags;        /* CEPH_OSD_FLAG_* */
	union {
		struct {
			u64 offset, length;
			u64 truncate_size;
			u32 truncate_seq;
		} extent;
		struct {
			const char *name;
			u32 name_len;
			const char  *val;
			u32 value_len;
			__u8 cmp_op;       /* CEPH_OSD_CMPXATTR_OP_* */
			__u8 cmp_mode;     /* CEPH_OSD_CMPXATTR_MODE_* */
		} xattr;
		struct {
			const char *class_name;
			__u8 class_len;
			const char *method_name;
			__u8 method_len;
			__u8 argc;
			const char *indata;
			u32 indata_len;
		} cls;
		struct {
			u64 cookie, count;
		} pgls;
	        struct {
		        u64 snapid;
	        } snap;
	};
	u32 payload_len;
};

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 ceph_calc_raw_layout(struct ceph_osd_client *osdc,
			struct ceph_file_layout *layout,
			u64 snapid,
			u64 off, u64 *plen, u64 *bno,
			struct ceph_osd_request *req,
			struct ceph_osd_req_op *op);

extern struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc,
					       int flags,
					       struct ceph_snap_context *snapc,
					       struct ceph_osd_req_op *ops,
					       bool use_mempool,
					       gfp_t gfp_flags,
					       struct page **pages,
					       struct bio *bio);

extern void ceph_osdc_build_request(struct ceph_osd_request *req,
				    u64 off, u64 *plen,
				    struct ceph_osd_req_op *src_ops,
				    struct ceph_snap_context *snapc,
				    struct timespec *mtime,
				    const char *oid,
				    int oid_len);

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;
68b4476b	18	struct ceph_pagelist;
f24e9980 SW	19
	20	/*
	21	* completion callback for async writepages
	22	*/
	23	typedef void (ceph_osdc_callback_t)(struct ceph_osd_request ,
	24	struct ceph_msg *);
	25
	26	/* a given osd we're communicating with */
	27	struct ceph_osd {
	28	atomic_t o_ref;
	29	struct ceph_osd_client *o_osdc;
	30	int o_osd;
	31	int o_incarnation;
	32	struct rb_node o_node;
	33	struct ceph_connection o_con;
	34	struct list_head o_requests;
f5a2041b	35	struct list_head o_osd_lru;
4e7a5dcd SW	36	struct ceph_authorizer *o_authorizer;
	37	void o_authorizer_buf, o_authorizer_reply_buf;
	38	size_t o_authorizer_buf_len, o_authorizer_reply_buf_len;
f5a2041b	39	unsigned long lru_ttl;
422d2cb8 YS	40	int o_marked_for_keepalive;
422d2cb8 YS	41	struct list_head o_keepalive_item;
f24e9980 SW	42	};
	43
	44	/* an in-flight request */
	45	struct ceph_osd_request {
	46	u64 r_tid; /* unique for this client */
	47	struct rb_node r_node;
422d2cb8	48	struct list_head r_req_lru_item;
f24e9980 SW	49	struct list_head r_osd_item;
f24e9980 SW	50	struct ceph_osd *r_osd;
7740a42f	51	struct ceph_pg r_pgid;
d85b7056 SW	52	int r_pg_osds[CEPH_PG_MAX_SIZE];
d85b7056 SW	53	int r_num_pg_osds;
f24e9980	54
0d59ab81	55	struct ceph_connection *r_con_filling_msg;
350b1c32	56
f24e9980 SW	57	struct ceph_msg r_request, r_reply;
	58	int r_result;
	59	int r_flags; /* any additional flags for the osd */
	60	u32 r_sent; /* >0 if r_request is sending/sent */
350b1c32	61	int r_got_reply;
f24e9980 SW	62
f24e9980 SW	63	struct ceph_osd_client *r_osdc;
415e49a9	64	struct kref r_kref;
f24e9980 SW	65	bool r_mempool;
	66	struct completion r_completion, r_safe_completion;
	67	ceph_osdc_callback_t r_callback, r_safe_callback;
	68	struct ceph_eversion r_reassert_version;
	69	struct list_head r_unsafe_item;
	70
	71	struct inode r_inode; / for use by callbacks */
f24e9980 SW	72
	73	char r_oid[40]; /* object name */
	74	int r_oid_len;
3dd72fc0	75	unsigned long r_stamp; /* send OR check time */
f24e9980 SW	76	bool r_resend; /* msg send failed, needs retry */
	77
	78	struct ceph_file_layout r_file_layout;
	79	struct ceph_snap_context r_snapc; / snap context for writes */
	80	unsigned r_num_pages; /* size of page array (follows) */
	81	struct page *r_pages; / pages for data payload */
	82	int r_pages_from_pool;
	83	int r_own_pages; /* if true, i own page list */
68b4476b YS	84	#ifdef CONFIG_BLOCK
	85	struct bio r_bio; / instead of pages */
	86	#endif
	87
	88	struct ceph_pagelist r_trail; / trailing part of the data */
f24e9980 SW	89	};
	90
	91	struct ceph_osd_client {
	92	struct ceph_client *client;
	93
	94	struct ceph_osdmap osdmap; / current map */
	95	struct rw_semaphore map_sem;
	96	struct completion map_waiters;
	97	u64 last_requested_map;
	98
	99	struct mutex request_mutex;
	100	struct rb_root osds; /* osds */
f5a2041b	101	struct list_head osd_lru; /* idle osds */
f24e9980 SW	102	u64 timeout_tid; /* tid of timeout triggering rq */
	103	u64 last_tid; /* tid of last request */
	104	struct rb_root requests; /* pending requests */
422d2cb8	105	struct list_head req_lru; /* pending requests lru */
f24e9980 SW	106	int num_requests;
f24e9980 SW	107	struct delayed_work timeout_work;
f5a2041b	108	struct delayed_work osds_timeout_work;
039934b8	109	#ifdef CONFIG_DEBUG_FS
f24e9980	110	struct dentry *debugfs_file;
039934b8	111	#endif
f24e9980 SW	112
	113	mempool_t *req_mempool;
	114
0d59ab81	115	struct ceph_msgpool msgpool_op;
c16e7869	116	struct ceph_msgpool msgpool_op_reply;
f24e9980 SW	117	};
f24e9980 SW	118
68b4476b YS	119	struct ceph_osd_req_op {
	120	u16 op; /* CEPH_OSD_OP_* */
	121	u32 flags; /* CEPH_OSD_FLAG_* */
	122	union {
	123	struct {
	124	u64 offset, length;
	125	u64 truncate_size;
	126	u32 truncate_seq;
	127	} extent;
	128	struct {
	129	const char *name;
	130	u32 name_len;
	131	const char *val;
	132	u32 value_len;
	133	__u8 cmp_op; /* CEPH_OSD_CMPXATTR_OP_* */
	134	__u8 cmp_mode; /* CEPH_OSD_CMPXATTR_MODE_* */
	135	} xattr;
	136	struct {
ae1533b6	137	const char *class_name;
68b4476b	138	__u8 class_len;
ae1533b6	139	const char *method_name;
68b4476b YS	140	__u8 method_len;
68b4476b YS	141	__u8 argc;
ae1533b6	142	const char *indata;
68b4476b YS	143	u32 indata_len;
	144	} cls;
	145	struct {
	146	u64 cookie, count;
	147	} pgls;
ae1533b6 YS	148	struct {
	149	u64 snapid;
	150	} snap;
68b4476b YS	151	};
	152	u32 payload_len;
	153	};
	154
f24e9980 SW	155	extern int ceph_osdc_init(struct ceph_osd_client *osdc,
	156	struct ceph_client *client);
	157	extern void ceph_osdc_stop(struct ceph_osd_client *osdc);
	158
	159	extern void ceph_osdc_handle_reply(struct ceph_osd_client *osdc,
	160	struct ceph_msg *msg);
	161	extern void ceph_osdc_handle_map(struct ceph_osd_client *osdc,
	162	struct ceph_msg *msg);
	163
3499e8a5 YS	164	extern void ceph_calc_raw_layout(struct ceph_osd_client *osdc,
	165	struct ceph_file_layout *layout,
	166	u64 snapid,
68b4476b YS	167	u64 off, u64 plen, u64 bno,
	168	struct ceph_osd_request *req,
	169	struct ceph_osd_req_op *op);
3499e8a5 YS	170
	171	extern struct ceph_osd_request ceph_osdc_alloc_request(struct ceph_osd_client osdc,
	172	int flags,
	173	struct ceph_snap_context *snapc,
68b4476b	174	struct ceph_osd_req_op *ops,
3499e8a5 YS	175	bool use_mempool,
3499e8a5 YS	176	gfp_t gfp_flags,
68b4476b YS	177	struct page **pages,
68b4476b YS	178	struct bio *bio);
3499e8a5 YS	179
3499e8a5 YS	180	extern void ceph_osdc_build_request(struct ceph_osd_request *req,
68b4476b YS	181	u64 off, u64 *plen,
	182	struct ceph_osd_req_op *src_ops,
	183	struct ceph_snap_context *snapc,
	184	struct timespec *mtime,
	185	const char *oid,
	186	int oid_len);
3499e8a5	187
f24e9980 SW	188	extern struct ceph_osd_request ceph_osdc_new_request(struct ceph_osd_client ,
	189	struct ceph_file_layout *layout,
	190	struct ceph_vino vino,
	191	u64 offset, u64 *len, int op, int flags,
	192	struct ceph_snap_context *snapc,
	193	int do_sync, u32 truncate_seq,
	194	u64 truncate_size,
	195	struct timespec *mtime,
	196	bool use_mempool, int num_reply);
	197
	198	static inline void ceph_osdc_get_request(struct ceph_osd_request *req)
	199	{
415e49a9 SW	200	kref_get(&req->r_kref);
	201	}
	202	extern void ceph_osdc_release_request(struct kref *kref);
	203	static inline void ceph_osdc_put_request(struct ceph_osd_request *req)
	204	{
	205	kref_put(&req->r_kref, ceph_osdc_release_request);
f24e9980	206	}
f24e9980 SW	207
	208	extern int ceph_osdc_start_request(struct ceph_osd_client *osdc,
	209	struct ceph_osd_request *req,
	210	bool nofail);
	211	extern int ceph_osdc_wait_request(struct ceph_osd_client *osdc,
	212	struct ceph_osd_request *req);
	213	extern void ceph_osdc_sync(struct ceph_osd_client *osdc);
	214
	215	extern int ceph_osdc_readpages(struct ceph_osd_client *osdc,
	216	struct ceph_vino vino,
	217	struct ceph_file_layout *layout,
	218	u64 off, u64 *plen,
	219	u32 truncate_seq, u64 truncate_size,
	220	struct page **pages, int nr_pages);
	221
	222	extern int ceph_osdc_writepages(struct ceph_osd_client *osdc,
	223	struct ceph_vino vino,
	224	struct ceph_file_layout *layout,
	225	struct ceph_snap_context *sc,
	226	u64 off, u64 len,
	227	u32 truncate_seq, u64 truncate_size,
	228	struct timespec *mtime,
	229	struct page **pages, int nr_pages,
	230	int flags, int do_sync, bool nofail);
	231
	232	#endif
	233