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 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;
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 struct ceph_pg r_pgid;
47 struct ceph_connection *r_con_filling_msg;
49 struct ceph_msg *r_request, *r_reply;
51 int r_flags; /* any additional flags for the osd */
52 u32 r_sent; /* >0 if r_request is sending/sent */
54 int r_num_prealloc_reply;
56 struct ceph_osd_client *r_osdc;
59 struct completion r_completion, r_safe_completion;
60 ceph_osdc_callback_t r_callback, r_safe_callback;
61 struct ceph_eversion r_reassert_version;
62 struct list_head r_unsafe_item;
64 struct inode *r_inode; /* for use by callbacks */
65 struct writeback_control *r_wbc; /* ditto */
67 char r_oid[40]; /* object name */
69 unsigned long r_timeout_stamp;
70 bool r_resend; /* msg send failed, needs retry */
72 struct ceph_file_layout r_file_layout;
73 struct ceph_snap_context *r_snapc; /* snap context for writes */
74 unsigned r_num_pages; /* size of page array (follows) */
75 struct page **r_pages; /* pages for data payload */
76 int r_pages_from_pool;
77 int r_own_pages; /* if true, i own page list */
79 struct ceph_msg *replies[2];
83 struct ceph_osd_client {
84 struct ceph_client *client;
86 struct ceph_osdmap *osdmap; /* current map */
87 struct rw_semaphore map_sem;
88 struct completion map_waiters;
89 u64 last_requested_map;
91 struct mutex request_mutex;
92 struct rb_root osds; /* osds */
93 u64 timeout_tid; /* tid of timeout triggering rq */
94 u64 last_tid; /* tid of last request */
95 struct rb_root requests; /* pending requests */
97 struct delayed_work timeout_work;
98 #ifdef CONFIG_DEBUG_FS
99 struct dentry *debugfs_file;
102 mempool_t *req_mempool;
104 struct ceph_msgpool msgpool_op;
107 extern int ceph_osdc_init(struct ceph_osd_client *osdc,
108 struct ceph_client *client);
109 extern void ceph_osdc_stop(struct ceph_osd_client *osdc);
111 extern void ceph_osdc_handle_reply(struct ceph_osd_client *osdc,
112 struct ceph_msg *msg);
113 extern void ceph_osdc_handle_map(struct ceph_osd_client *osdc,
114 struct ceph_msg *msg);
116 extern struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *,
117 struct ceph_file_layout *layout,
118 struct ceph_vino vino,
119 u64 offset, u64 *len, int op, int flags,
120 struct ceph_snap_context *snapc,
121 int do_sync, u32 truncate_seq,
123 struct timespec *mtime,
124 bool use_mempool, int num_reply);
126 static inline void ceph_osdc_get_request(struct ceph_osd_request *req)
128 kref_get(&req->r_kref);
130 extern void ceph_osdc_release_request(struct kref *kref);
131 static inline void ceph_osdc_put_request(struct ceph_osd_request *req)
133 kref_put(&req->r_kref, ceph_osdc_release_request);
136 extern int ceph_osdc_start_request(struct ceph_osd_client *osdc,
137 struct ceph_osd_request *req,
139 extern int ceph_osdc_wait_request(struct ceph_osd_client *osdc,
140 struct ceph_osd_request *req);
141 extern void ceph_osdc_sync(struct ceph_osd_client *osdc);
143 extern int ceph_osdc_readpages(struct ceph_osd_client *osdc,
144 struct ceph_vino vino,
145 struct ceph_file_layout *layout,
147 u32 truncate_seq, u64 truncate_size,
148 struct page **pages, int nr_pages);
150 extern int ceph_osdc_writepages(struct ceph_osd_client *osdc,
151 struct ceph_vino vino,
152 struct ceph_file_layout *layout,
153 struct ceph_snap_context *sc,
155 u32 truncate_seq, u64 truncate_size,
156 struct timespec *mtime,
157 struct page **pages, int nr_pages,
158 int flags, int do_sync, bool nofail);