1 #ifndef _FS_CEPH_OSD_CLIENT_H
2 #define _FS_CEPH_OSD_CLIENT_H
4 #include <linux/completion.h>
5 #include <linux/mempool.h>
6 #include <linux/rbtree.h>
10 #include "messenger.h"
13 struct ceph_snap_context;
14 struct ceph_osd_request;
15 struct ceph_osd_client;
18 * completion callback for async writepages
20 typedef void (*ceph_osdc_callback_t)(struct ceph_osd_request *,
23 /* a given osd we're communicating with */
26 struct ceph_osd_client *o_osdc;
29 struct rb_node o_node;
30 struct ceph_connection o_con;
31 struct list_head o_requests;
34 /* an in-flight request */
35 struct ceph_osd_request {
36 u64 r_tid; /* unique for this client */
37 struct rb_node r_node;
38 struct list_head r_osd_item;
39 struct ceph_osd *r_osd;
41 struct ceph_msg *r_request, *r_reply;
43 int r_flags; /* any additional flags for the osd */
44 u32 r_sent; /* >0 if r_request is sending/sent */
45 int r_prepared_pages, r_got_reply;
47 struct ceph_osd_client *r_osdc;
50 struct completion r_completion, r_safe_completion;
51 ceph_osdc_callback_t r_callback, r_safe_callback;
52 struct ceph_eversion r_reassert_version;
53 struct list_head r_unsafe_item;
55 struct inode *r_inode; /* for use by callbacks */
56 struct writeback_control *r_wbc; /* ditto */
58 char r_oid[40]; /* object name */
60 unsigned long r_timeout_stamp;
61 bool r_resend; /* msg send failed, needs retry */
63 struct ceph_file_layout r_file_layout;
64 struct ceph_snap_context *r_snapc; /* snap context for writes */
65 unsigned r_num_pages; /* size of page array (follows) */
66 struct page **r_pages; /* pages for data payload */
67 int r_pages_from_pool;
68 int r_own_pages; /* if true, i own page list */
71 struct ceph_osd_client {
72 struct ceph_client *client;
74 struct ceph_osdmap *osdmap; /* current map */
75 struct rw_semaphore map_sem;
76 struct completion map_waiters;
77 u64 last_requested_map;
79 struct mutex request_mutex;
80 struct rb_root osds; /* osds */
81 u64 timeout_tid; /* tid of timeout triggering rq */
82 u64 last_tid; /* tid of last request */
83 struct rb_root requests; /* pending requests */
85 struct delayed_work timeout_work;
86 struct dentry *debugfs_file;
88 mempool_t *req_mempool;
90 struct ceph_msgpool msgpool_op;
91 struct ceph_msgpool msgpool_op_reply;
94 extern int ceph_osdc_init(struct ceph_osd_client *osdc,
95 struct ceph_client *client);
96 extern void ceph_osdc_stop(struct ceph_osd_client *osdc);
98 extern void ceph_osdc_handle_reply(struct ceph_osd_client *osdc,
99 struct ceph_msg *msg);
100 extern void ceph_osdc_handle_map(struct ceph_osd_client *osdc,
101 struct ceph_msg *msg);
103 extern struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *,
104 struct ceph_file_layout *layout,
105 struct ceph_vino vino,
106 u64 offset, u64 *len, int op, int flags,
107 struct ceph_snap_context *snapc,
108 int do_sync, u32 truncate_seq,
110 struct timespec *mtime,
111 bool use_mempool, int num_reply);
113 static inline void ceph_osdc_get_request(struct ceph_osd_request *req)
115 atomic_inc(&req->r_ref);
117 extern void ceph_osdc_put_request(struct ceph_osd_request *req);
119 extern int ceph_osdc_start_request(struct ceph_osd_client *osdc,
120 struct ceph_osd_request *req,
122 extern int ceph_osdc_wait_request(struct ceph_osd_client *osdc,
123 struct ceph_osd_request *req);
124 extern void ceph_osdc_sync(struct ceph_osd_client *osdc);
126 extern int ceph_osdc_readpages(struct ceph_osd_client *osdc,
127 struct ceph_vino vino,
128 struct ceph_file_layout *layout,
130 u32 truncate_seq, u64 truncate_size,
131 struct page **pages, int nr_pages);
133 extern int ceph_osdc_writepages(struct ceph_osd_client *osdc,
134 struct ceph_vino vino,
135 struct ceph_file_layout *layout,
136 struct ceph_snap_context *sc,
138 u32 truncate_seq, u64 truncate_size,
139 struct timespec *mtime,
140 struct page **pages, int nr_pages,
141 int flags, int do_sync, bool nofail);