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>
11 #include "messenger.h"
14 struct ceph_snap_context;
15 struct ceph_osd_request;
16 struct ceph_osd_client;
17 struct ceph_authorizer;
20 * completion callback for async writepages
22 typedef void (*ceph_osdc_callback_t)(struct ceph_osd_request *,
25 /* a given osd we're communicating with */
28 struct ceph_osd_client *o_osdc;
31 struct rb_node o_node;
32 struct ceph_connection o_con;
33 struct list_head o_requests;
34 struct list_head o_osd_lru;
35 struct ceph_authorizer *o_authorizer;
36 void *o_authorizer_buf, *o_authorizer_reply_buf;
37 size_t o_authorizer_buf_len, o_authorizer_reply_buf_len;
38 unsigned long lru_ttl;
41 /* an in-flight request */
42 struct ceph_osd_request {
43 u64 r_tid; /* unique for this client */
44 struct rb_node r_node;
45 struct list_head r_osd_item;
46 struct ceph_osd *r_osd;
47 struct ceph_pg r_pgid;
49 struct ceph_connection *r_con_filling_msg;
51 struct ceph_msg *r_request, *r_reply;
53 int r_flags; /* any additional flags for the osd */
54 u32 r_sent; /* >0 if r_request is sending/sent */
57 struct ceph_osd_client *r_osdc;
60 struct completion r_completion, r_safe_completion;
61 ceph_osdc_callback_t r_callback, r_safe_callback;
62 struct ceph_eversion r_reassert_version;
63 struct list_head r_unsafe_item;
65 struct inode *r_inode; /* for use by callbacks */
66 struct writeback_control *r_wbc; /* ditto */
68 char r_oid[40]; /* object name */
70 unsigned long r_timeout_stamp;
71 bool r_resend; /* msg send failed, needs retry */
73 struct ceph_file_layout r_file_layout;
74 struct ceph_snap_context *r_snapc; /* snap context for writes */
75 unsigned r_num_pages; /* size of page array (follows) */
76 struct page **r_pages; /* pages for data payload */
77 int r_pages_from_pool;
78 int r_own_pages; /* if true, i own page list */
81 struct ceph_osd_client {
82 struct ceph_client *client;
84 struct ceph_osdmap *osdmap; /* current map */
85 struct rw_semaphore map_sem;
86 struct completion map_waiters;
87 u64 last_requested_map;
89 struct mutex request_mutex;
90 struct rb_root osds; /* osds */
91 struct list_head osd_lru; /* idle osds */
92 u64 timeout_tid; /* tid of timeout triggering rq */
93 u64 last_tid; /* tid of last request */
94 struct rb_root requests; /* pending requests */
96 struct delayed_work timeout_work;
97 struct delayed_work osds_timeout_work;
98 #ifdef CONFIG_DEBUG_FS
99 struct dentry *debugfs_file;
102 mempool_t *req_mempool;
104 struct ceph_msgpool msgpool_op;
105 struct ceph_msgpool msgpool_op_reply;
108 extern int ceph_osdc_init(struct ceph_osd_client *osdc,
109 struct ceph_client *client);
110 extern void ceph_osdc_stop(struct ceph_osd_client *osdc);
112 extern void ceph_osdc_handle_reply(struct ceph_osd_client *osdc,
113 struct ceph_msg *msg);
114 extern void ceph_osdc_handle_map(struct ceph_osd_client *osdc,
115 struct ceph_msg *msg);
117 extern struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *,
118 struct ceph_file_layout *layout,
119 struct ceph_vino vino,
120 u64 offset, u64 *len, int op, int flags,
121 struct ceph_snap_context *snapc,
122 int do_sync, u32 truncate_seq,
124 struct timespec *mtime,
125 bool use_mempool, int num_reply);
127 static inline void ceph_osdc_get_request(struct ceph_osd_request *req)
129 kref_get(&req->r_kref);
131 extern void ceph_osdc_release_request(struct kref *kref);
132 static inline void ceph_osdc_put_request(struct ceph_osd_request *req)
134 kref_put(&req->r_kref, ceph_osdc_release_request);
137 extern int ceph_osdc_start_request(struct ceph_osd_client *osdc,
138 struct ceph_osd_request *req,
140 extern int ceph_osdc_wait_request(struct ceph_osd_client *osdc,
141 struct ceph_osd_request *req);
142 extern void ceph_osdc_sync(struct ceph_osd_client *osdc);
144 extern int ceph_osdc_readpages(struct ceph_osd_client *osdc,
145 struct ceph_vino vino,
146 struct ceph_file_layout *layout,
148 u32 truncate_seq, u64 truncate_size,
149 struct page **pages, int nr_pages);
151 extern int ceph_osdc_writepages(struct ceph_osd_client *osdc,
152 struct ceph_vino vino,
153 struct ceph_file_layout *layout,
154 struct ceph_snap_context *sc,
156 u32 truncate_seq, u64 truncate_size,
157 struct timespec *mtime,
158 struct page **pages, int nr_pages,
159 int flags, int do_sync, bool nofail);