1 #ifndef _FS_CEPH_OSD_CLIENT_H
2 #define _FS_CEPH_OSD_CLIENT_H
4 #include <linux/completion.h>
5 #include <linux/kref.h>
6 #include <linux/mempool.h>
7 #include <linux/rbtree.h>
9 #include <linux/ceph/types.h>
10 #include <linux/ceph/osdmap.h>
11 #include <linux/ceph/messenger.h>
12 #include <linux/ceph/auth.h>
13 #include <linux/ceph/pagelist.h>
16 * Maximum object name size
17 * (must be at least as big as RBD_MAX_MD_NAME_LEN -- currently 100)
19 #define MAX_OBJ_NAME_SIZE 100
22 struct ceph_snap_context;
23 struct ceph_osd_request;
24 struct ceph_osd_client;
25 struct ceph_authorizer;
28 * completion callback for async writepages
30 typedef void (*ceph_osdc_callback_t)(struct ceph_osd_request *,
33 /* a given osd we're communicating with */
36 struct ceph_osd_client *o_osdc;
39 struct rb_node o_node;
40 struct ceph_connection o_con;
41 struct list_head o_requests;
42 struct list_head o_linger_requests;
43 struct list_head o_osd_lru;
44 struct ceph_auth_handshake o_auth;
45 unsigned long lru_ttl;
46 int o_marked_for_keepalive;
47 struct list_head o_keepalive_item;
51 #define CEPH_OSD_MAX_OP 10
53 /* an in-flight request */
54 struct ceph_osd_request {
55 u64 r_tid; /* unique for this client */
56 struct rb_node r_node;
57 struct list_head r_req_lru_item;
58 struct list_head r_osd_item;
59 struct list_head r_linger_item;
60 struct list_head r_linger_osd;
61 struct ceph_osd *r_osd;
62 struct ceph_pg r_pgid;
63 int r_pg_osds[CEPH_PG_MAX_SIZE];
66 struct ceph_connection *r_con_filling_msg;
68 struct ceph_msg *r_request, *r_reply;
69 int r_flags; /* any additional flags for the osd */
70 u32 r_sent; /* >0 if r_request is sending/sent */
73 /* encoded message content */
74 struct ceph_osd_op *r_request_ops;
75 /* these are updated on each send */
76 __le32 *r_request_osdmap_epoch;
77 __le32 *r_request_flags;
78 __le64 *r_request_pool;
80 __le32 *r_request_attempts;
81 struct ceph_eversion *r_request_reassert_version;
84 int r_reply_op_len[CEPH_OSD_MAX_OP];
85 s32 r_reply_op_result[CEPH_OSD_MAX_OP];
90 struct ceph_osd_client *r_osdc;
93 struct completion r_completion, r_safe_completion;
94 ceph_osdc_callback_t r_callback, r_safe_callback;
95 struct ceph_eversion r_reassert_version;
96 struct list_head r_unsafe_item;
98 struct inode *r_inode; /* for use by callbacks */
99 void *r_priv; /* ditto */
101 char r_oid[MAX_OBJ_NAME_SIZE]; /* object name */
104 unsigned long r_stamp; /* send OR check time */
106 struct ceph_file_layout r_file_layout;
107 struct ceph_snap_context *r_snapc; /* snap context for writes */
108 unsigned r_num_pages; /* size of page array (follows) */
109 unsigned r_page_alignment; /* io offset in first page */
110 struct page **r_pages; /* pages for data payload */
111 int r_pages_from_pool;
112 int r_own_pages; /* if true, i own page list */
114 struct bio *r_bio; /* instead of pages */
117 struct ceph_pagelist r_trail; /* trailing part of the data */
120 struct ceph_osd_event {
123 struct ceph_osd_client *osdc;
124 void (*cb)(u64, u64, u8, void *);
127 struct list_head osd_node;
131 struct ceph_osd_event_work {
132 struct work_struct work;
133 struct ceph_osd_event *event;
139 struct ceph_osd_client {
140 struct ceph_client *client;
142 struct ceph_osdmap *osdmap; /* current map */
143 struct rw_semaphore map_sem;
144 struct completion map_waiters;
145 u64 last_requested_map;
147 struct mutex request_mutex;
148 struct rb_root osds; /* osds */
149 struct list_head osd_lru; /* idle osds */
150 u64 timeout_tid; /* tid of timeout triggering rq */
151 u64 last_tid; /* tid of last request */
152 struct rb_root requests; /* pending requests */
153 struct list_head req_lru; /* in-flight lru */
154 struct list_head req_unsent; /* unsent/need-resend queue */
155 struct list_head req_notarget; /* map to no osd */
156 struct list_head req_linger; /* lingering requests */
158 struct delayed_work timeout_work;
159 struct delayed_work osds_timeout_work;
160 #ifdef CONFIG_DEBUG_FS
161 struct dentry *debugfs_file;
164 mempool_t *req_mempool;
166 struct ceph_msgpool msgpool_op;
167 struct ceph_msgpool msgpool_op_reply;
169 spinlock_t event_lock;
170 struct rb_root event_tree;
173 struct workqueue_struct *notify_wq;
176 struct ceph_osd_req_op {
177 u16 op; /* CEPH_OSD_OP_* */
190 __u8 cmp_op; /* CEPH_OSD_CMPXATTR_OP_* */
191 __u8 cmp_mode; /* CEPH_OSD_CMPXATTR_MODE_* */
194 const char *class_name;
195 const char *method_name;
219 extern int ceph_osdc_init(struct ceph_osd_client *osdc,
220 struct ceph_client *client);
221 extern void ceph_osdc_stop(struct ceph_osd_client *osdc);
223 extern void ceph_osdc_handle_reply(struct ceph_osd_client *osdc,
224 struct ceph_msg *msg);
225 extern void ceph_osdc_handle_map(struct ceph_osd_client *osdc,
226 struct ceph_msg *msg);
228 extern struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc,
229 struct ceph_snap_context *snapc,
234 extern void ceph_osdc_build_request(struct ceph_osd_request *req,
237 struct ceph_osd_req_op *src_ops,
238 struct ceph_snap_context *snapc,
240 struct timespec *mtime);
242 extern struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *,
243 struct ceph_file_layout *layout,
244 struct ceph_vino vino,
245 u64 offset, u64 *len, int op, int flags,
246 struct ceph_snap_context *snapc,
247 int do_sync, u32 truncate_seq,
249 struct timespec *mtime,
252 extern void ceph_osdc_set_request_linger(struct ceph_osd_client *osdc,
253 struct ceph_osd_request *req);
254 extern void ceph_osdc_unregister_linger_request(struct ceph_osd_client *osdc,
255 struct ceph_osd_request *req);
257 static inline void ceph_osdc_get_request(struct ceph_osd_request *req)
259 kref_get(&req->r_kref);
261 extern void ceph_osdc_release_request(struct kref *kref);
262 static inline void ceph_osdc_put_request(struct ceph_osd_request *req)
264 kref_put(&req->r_kref, ceph_osdc_release_request);
267 extern int ceph_osdc_start_request(struct ceph_osd_client *osdc,
268 struct ceph_osd_request *req,
270 extern int ceph_osdc_wait_request(struct ceph_osd_client *osdc,
271 struct ceph_osd_request *req);
272 extern void ceph_osdc_sync(struct ceph_osd_client *osdc);
274 extern int ceph_osdc_readpages(struct ceph_osd_client *osdc,
275 struct ceph_vino vino,
276 struct ceph_file_layout *layout,
278 u32 truncate_seq, u64 truncate_size,
279 struct page **pages, int nr_pages,
282 extern int ceph_osdc_writepages(struct ceph_osd_client *osdc,
283 struct ceph_vino vino,
284 struct ceph_file_layout *layout,
285 struct ceph_snap_context *sc,
287 u32 truncate_seq, u64 truncate_size,
288 struct timespec *mtime,
289 struct page **pages, int nr_pages);
291 /* watch/notify events */
292 extern int ceph_osdc_create_event(struct ceph_osd_client *osdc,
293 void (*event_cb)(u64, u64, u8, void *),
294 void *data, struct ceph_osd_event **pevent);
295 extern void ceph_osdc_cancel_event(struct ceph_osd_event *event);
296 extern void ceph_osdc_put_event(struct ceph_osd_event *event);