osd_client.h revision f24e9980eb860d8600cbe5ef3d2fd9295320d229 
1f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil#ifndef _FS_CEPH_OSD_CLIENT_H
2f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil#define _FS_CEPH_OSD_CLIENT_H
3f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil
4f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil#include <linux/completion.h>
5f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil#include <linux/mempool.h>
6f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil#include <linux/rbtree.h>
7f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil
8f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil#include "types.h"
9f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil#include "osdmap.h"
10f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil#include "messenger.h"
11f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil
12f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weilstruct ceph_msg;
13f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weilstruct ceph_snap_context;
14f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weilstruct ceph_osd_request;
15f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weilstruct ceph_osd_client;
16f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil
17f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil/*
18f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil * completion callback for async writepages
19f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil */
20f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weiltypedef void (*ceph_osdc_callback_t)(struct ceph_osd_request *,
21f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil				     struct ceph_msg *);
22f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil
23f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil/* a given osd we're communicating with */
24f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weilstruct ceph_osd {
25f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil	atomic_t o_ref;
26f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil	struct ceph_osd_client *o_osdc;
27f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil	int o_osd;
28f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil	int o_incarnation;
29f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil	struct rb_node o_node;
30f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil	struct ceph_connection o_con;
31f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil	struct list_head o_requests;
32f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil};
33f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil
34f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil/* an in-flight request */
35f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weilstruct ceph_osd_request {
36f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil	u64             r_tid;              /* unique for this client */
37f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil	struct rb_node  r_node;
38f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil	struct list_head r_osd_item;
39f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil	struct ceph_osd *r_osd;
40f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil
41f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil	struct ceph_msg  *r_request, *r_reply;
42f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil	int               r_result;
43f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil	int               r_flags;     /* any additional flags for the osd */
44f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil	u32               r_sent;      /* >0 if r_request is sending/sent */
45f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil	int r_prepared_pages, r_got_reply;
46f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil
47f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil	struct ceph_osd_client *r_osdc;
48f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil	atomic_t          r_ref;
49f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil	bool              r_mempool;
50f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil	struct completion r_completion, r_safe_completion;
51f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil	ceph_osdc_callback_t r_callback, r_safe_callback;
52f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil	struct ceph_eversion r_reassert_version;
53f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil	struct list_head  r_unsafe_item;
54f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil
55f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil	struct inode *r_inode;         	      /* for use by callbacks */
56f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil	struct writeback_control *r_wbc;      /* ditto */
57f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil
58f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil	char              r_oid[40];          /* object name */
59f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil	int               r_oid_len;
60f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil	unsigned long     r_timeout_stamp;
61f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil	bool              r_resend;           /* msg send failed, needs retry */
62f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil
63f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil	struct ceph_file_layout r_file_layout;
64f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil	struct ceph_snap_context *r_snapc;    /* snap context for writes */
65f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil	unsigned          r_num_pages;        /* size of page array (follows) */
66f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil	struct page     **r_pages;            /* pages for data payload */
67f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil	int               r_pages_from_pool;
68f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil	int               r_own_pages;        /* if true, i own page list */
69f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil};
70f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil
71f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weilstruct ceph_osd_client {
72f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil	struct ceph_client     *client;
73f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil
74f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil	struct ceph_osdmap     *osdmap;       /* current map */
75f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil	struct rw_semaphore    map_sem;
76f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil	struct completion      map_waiters;
77f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil	u64                    last_requested_map;
78f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil
79f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil	struct mutex           request_mutex;
80f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil	struct rb_root         osds;          /* osds */
81f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil	u64                    timeout_tid;   /* tid of timeout triggering rq */
82f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil	u64                    last_tid;      /* tid of last request */
83f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil	struct rb_root         requests;      /* pending requests */
84f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil	int                    num_requests;
85f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil	struct delayed_work    timeout_work;
86f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil	struct dentry 	       *debugfs_file;
87f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil
88f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil	mempool_t              *req_mempool;
89f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil
90f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil	struct ceph_msgpool   msgpool_op;
91f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil	struct ceph_msgpool   msgpool_op_reply;
92f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil};
93f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil
94f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weilextern int ceph_osdc_init(struct ceph_osd_client *osdc,
95f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil			  struct ceph_client *client);
96f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weilextern void ceph_osdc_stop(struct ceph_osd_client *osdc);
97f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil
98f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weilextern void ceph_osdc_handle_reply(struct ceph_osd_client *osdc,
99f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil				   struct ceph_msg *msg);
100f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weilextern void ceph_osdc_handle_map(struct ceph_osd_client *osdc,
101f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil				 struct ceph_msg *msg);
102f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil
103f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weilextern struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *,
104f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil				      struct ceph_file_layout *layout,
105f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil				      struct ceph_vino vino,
106f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil				      u64 offset, u64 *len, int op, int flags,
107f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil				      struct ceph_snap_context *snapc,
108f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil				      int do_sync, u32 truncate_seq,
109f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil				      u64 truncate_size,
110f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil				      struct timespec *mtime,
111f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil				      bool use_mempool, int num_reply);
112f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil
113f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weilstatic inline void ceph_osdc_get_request(struct ceph_osd_request *req)
114f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil{
115f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil	atomic_inc(&req->r_ref);
116f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil}
117f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weilextern void ceph_osdc_put_request(struct ceph_osd_request *req);
118f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil
119f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weilextern int ceph_osdc_start_request(struct ceph_osd_client *osdc,
120f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil				   struct ceph_osd_request *req,
121f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil				   bool nofail);
122f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weilextern int ceph_osdc_wait_request(struct ceph_osd_client *osdc,
123f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil				  struct ceph_osd_request *req);
124f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weilextern void ceph_osdc_sync(struct ceph_osd_client *osdc);
125f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil
126f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weilextern int ceph_osdc_readpages(struct ceph_osd_client *osdc,
127f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil			       struct ceph_vino vino,
128f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil			       struct ceph_file_layout *layout,
129f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil			       u64 off, u64 *plen,
130f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil			       u32 truncate_seq, u64 truncate_size,
131f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil			       struct page **pages, int nr_pages);
132f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil
133f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weilextern int ceph_osdc_writepages(struct ceph_osd_client *osdc,
134f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil				struct ceph_vino vino,
135f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil				struct ceph_file_layout *layout,
136f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil				struct ceph_snap_context *sc,
137f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil				u64 off, u64 len,
138f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil				u32 truncate_seq, u64 truncate_size,
139f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil				struct timespec *mtime,
140f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil				struct page **pages, int nr_pages,
141f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil				int flags, int do_sync, bool nofail);
142f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil
143f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil#endif
144f24e9980eb860d8600cbe5ef3d2fd9295320d229Sage Weil
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