1
2#ifndef _FS_CEPH_LIBCEPH_H
3#define _FS_CEPH_LIBCEPH_H
4
5#include <linux/ceph/ceph_debug.h>
6
7#include <asm/unaligned.h>
8#include <linux/backing-dev.h>
9#include <linux/completion.h>
10#include <linux/exportfs.h>
11#include <linux/bug.h>
12#include <linux/fs.h>
13#include <linux/mempool.h>
14#include <linux/pagemap.h>
15#include <linux/wait.h>
16#include <linux/writeback.h>
17#include <linux/slab.h>
18#include <linux/refcount.h>
19
20#include <linux/ceph/types.h>
21#include <linux/ceph/messenger.h>
22#include <linux/ceph/msgpool.h>
23#include <linux/ceph/mon_client.h>
24#include <linux/ceph/osd_client.h>
25#include <linux/ceph/ceph_fs.h>
26#include <linux/ceph/string_table.h>
27
28
29
30
31#define CEPH_OPT_FSID (1<<0)
32#define CEPH_OPT_NOSHARE (1<<1)
33#define CEPH_OPT_MYIP (1<<2)
34#define CEPH_OPT_NOCRC (1<<3)
35#define CEPH_OPT_NOMSGAUTH (1<<4)
36#define CEPH_OPT_TCP_NODELAY (1<<5)
37#define CEPH_OPT_NOMSGSIGN (1<<6)
38
39#define CEPH_OPT_DEFAULT (CEPH_OPT_TCP_NODELAY)
40
41#define ceph_set_opt(client, opt) \
42 (client)->options->flags |= CEPH_OPT_##opt;
43#define ceph_test_opt(client, opt) \
44 (!!((client)->options->flags & CEPH_OPT_##opt))
45
46struct ceph_options {
47 int flags;
48 struct ceph_fsid fsid;
49 struct ceph_entity_addr my_addr;
50 unsigned long mount_timeout;
51 unsigned long osd_idle_ttl;
52 unsigned long osd_keepalive_timeout;
53 unsigned long osd_request_timeout;
54
55
56
57
58
59
60
61 struct ceph_entity_addr *mon_addr;
62
63 int num_mon;
64 char *name;
65 struct ceph_crypto_key *key;
66};
67
68
69
70
71#define CEPH_MOUNT_TIMEOUT_DEFAULT msecs_to_jiffies(60 * 1000)
72#define CEPH_OSD_KEEPALIVE_DEFAULT msecs_to_jiffies(5 * 1000)
73#define CEPH_OSD_IDLE_TTL_DEFAULT msecs_to_jiffies(60 * 1000)
74#define CEPH_OSD_REQUEST_TIMEOUT_DEFAULT 0
75
76#define CEPH_MONC_HUNT_INTERVAL msecs_to_jiffies(3 * 1000)
77#define CEPH_MONC_PING_INTERVAL msecs_to_jiffies(10 * 1000)
78#define CEPH_MONC_PING_TIMEOUT msecs_to_jiffies(30 * 1000)
79#define CEPH_MONC_HUNT_BACKOFF 2
80#define CEPH_MONC_HUNT_MAX_MULT 10
81
82#define CEPH_MSG_MAX_FRONT_LEN (16*1024*1024)
83#define CEPH_MSG_MAX_MIDDLE_LEN (16*1024*1024)
84#define CEPH_MSG_MAX_DATA_LEN (16*1024*1024)
85
86#define CEPH_AUTH_NAME_DEFAULT "guest"
87
88
89enum {
90 CEPH_MOUNT_MOUNTING,
91 CEPH_MOUNT_MOUNTED,
92 CEPH_MOUNT_UNMOUNTING,
93 CEPH_MOUNT_UNMOUNTED,
94 CEPH_MOUNT_SHUTDOWN,
95};
96
97static inline unsigned long ceph_timeout_jiffies(unsigned long timeout)
98{
99 return timeout ?: MAX_SCHEDULE_TIMEOUT;
100}
101
102struct ceph_mds_client;
103
104
105
106
107
108
109
110struct ceph_client {
111 struct ceph_fsid fsid;
112 bool have_fsid;
113
114 void *private;
115
116 struct ceph_options *options;
117
118 struct mutex mount_mutex;
119 wait_queue_head_t auth_wq;
120 int auth_err;
121
122 int (*extra_mon_dispatch)(struct ceph_client *, struct ceph_msg *);
123
124 u64 supported_features;
125 u64 required_features;
126
127 struct ceph_messenger msgr;
128 struct ceph_mon_client monc;
129 struct ceph_osd_client osdc;
130
131#ifdef CONFIG_DEBUG_FS
132 struct dentry *debugfs_dir;
133 struct dentry *debugfs_monmap;
134 struct dentry *debugfs_osdmap;
135 struct dentry *debugfs_options;
136#endif
137};
138
139#define from_msgr(ms) container_of(ms, struct ceph_client, msgr)
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154struct ceph_snap_context {
155 refcount_t nref;
156 u64 seq;
157 u32 num_snaps;
158 u64 snaps[];
159};
160
161extern struct ceph_snap_context *ceph_create_snap_context(u32 snap_count,
162 gfp_t gfp_flags);
163extern struct ceph_snap_context *ceph_get_snap_context(
164 struct ceph_snap_context *sc);
165extern void ceph_put_snap_context(struct ceph_snap_context *sc);
166
167
168
169
170
171static inline int calc_pages_for(u64 off, u64 len)
172{
173 return ((off+len+PAGE_SIZE-1) >> PAGE_SHIFT) -
174 (off >> PAGE_SHIFT);
175}
176
177#define RB_BYVAL(a) (a)
178#define RB_BYPTR(a) (&(a))
179#define RB_CMP3WAY(a, b) ((a) < (b) ? -1 : (a) > (b))
180
181#define DEFINE_RB_INSDEL_FUNCS2(name, type, keyfld, cmpexp, keyexp, nodefld) \
182static void insert_##name(struct rb_root *root, type *t) \
183{ \
184 struct rb_node **n = &root->rb_node; \
185 struct rb_node *parent = NULL; \
186 \
187 BUG_ON(!RB_EMPTY_NODE(&t->nodefld)); \
188 \
189 while (*n) { \
190 type *cur = rb_entry(*n, type, nodefld); \
191 int cmp; \
192 \
193 parent = *n; \
194 cmp = cmpexp(keyexp(t->keyfld), keyexp(cur->keyfld)); \
195 if (cmp < 0) \
196 n = &(*n)->rb_left; \
197 else if (cmp > 0) \
198 n = &(*n)->rb_right; \
199 else \
200 BUG(); \
201 } \
202 \
203 rb_link_node(&t->nodefld, parent, n); \
204 rb_insert_color(&t->nodefld, root); \
205} \
206static void erase_##name(struct rb_root *root, type *t) \
207{ \
208 BUG_ON(RB_EMPTY_NODE(&t->nodefld)); \
209 rb_erase(&t->nodefld, root); \
210 RB_CLEAR_NODE(&t->nodefld); \
211}
212
213
214
215
216
217#define DEFINE_RB_LOOKUP_FUNC2(name, type, keyfld, cmpexp, keyexp, \
218 lookup_param_type, nodefld) \
219static type *lookup_##name(struct rb_root *root, lookup_param_type key) \
220{ \
221 struct rb_node *n = root->rb_node; \
222 \
223 while (n) { \
224 type *cur = rb_entry(n, type, nodefld); \
225 int cmp; \
226 \
227 cmp = cmpexp(key, keyexp(cur->keyfld)); \
228 if (cmp < 0) \
229 n = n->rb_left; \
230 else if (cmp > 0) \
231 n = n->rb_right; \
232 else \
233 return cur; \
234 } \
235 \
236 return NULL; \
237}
238
239#define DEFINE_RB_FUNCS2(name, type, keyfld, cmpexp, keyexp, \
240 lookup_param_type, nodefld) \
241DEFINE_RB_INSDEL_FUNCS2(name, type, keyfld, cmpexp, keyexp, nodefld) \
242DEFINE_RB_LOOKUP_FUNC2(name, type, keyfld, cmpexp, keyexp, \
243 lookup_param_type, nodefld)
244
245
246
247
248#define DEFINE_RB_INSDEL_FUNCS(name, type, keyfld, nodefld) \
249DEFINE_RB_INSDEL_FUNCS2(name, type, keyfld, RB_CMP3WAY, RB_BYVAL, nodefld)
250
251#define DEFINE_RB_LOOKUP_FUNC(name, type, keyfld, nodefld) \
252extern type __lookup_##name##_key; \
253DEFINE_RB_LOOKUP_FUNC2(name, type, keyfld, RB_CMP3WAY, RB_BYVAL, \
254 typeof(__lookup_##name##_key.keyfld), nodefld)
255
256#define DEFINE_RB_FUNCS(name, type, keyfld, nodefld) \
257DEFINE_RB_INSDEL_FUNCS(name, type, keyfld, nodefld) \
258DEFINE_RB_LOOKUP_FUNC(name, type, keyfld, nodefld)
259
260extern struct kmem_cache *ceph_inode_cachep;
261extern struct kmem_cache *ceph_cap_cachep;
262extern struct kmem_cache *ceph_cap_flush_cachep;
263extern struct kmem_cache *ceph_dentry_cachep;
264extern struct kmem_cache *ceph_file_cachep;
265
266
267extern bool libceph_compatible(void *data);
268
269extern const char *ceph_msg_type_name(int type);
270extern int ceph_check_fsid(struct ceph_client *client, struct ceph_fsid *fsid);
271extern void *ceph_kvmalloc(size_t size, gfp_t flags);
272
273extern struct ceph_options *ceph_parse_options(char *options,
274 const char *dev_name, const char *dev_name_end,
275 int (*parse_extra_token)(char *c, void *private),
276 void *private);
277int ceph_print_client_options(struct seq_file *m, struct ceph_client *client);
278extern void ceph_destroy_options(struct ceph_options *opt);
279extern int ceph_compare_options(struct ceph_options *new_opt,
280 struct ceph_client *client);
281struct ceph_client *ceph_create_client(struct ceph_options *opt, void *private);
282struct ceph_entity_addr *ceph_client_addr(struct ceph_client *client);
283u64 ceph_client_gid(struct ceph_client *client);
284extern void ceph_destroy_client(struct ceph_client *client);
285extern int __ceph_open_session(struct ceph_client *client,
286 unsigned long started);
287extern int ceph_open_session(struct ceph_client *client);
288
289
290extern void ceph_release_page_vector(struct page **pages, int num_pages);
291
292extern struct page **ceph_get_direct_page_vector(const void __user *data,
293 int num_pages,
294 bool write_page);
295extern void ceph_put_page_vector(struct page **pages, int num_pages,
296 bool dirty);
297extern struct page **ceph_alloc_page_vector(int num_pages, gfp_t flags);
298extern int ceph_copy_user_to_page_vector(struct page **pages,
299 const void __user *data,
300 loff_t off, size_t len);
301extern void ceph_copy_to_page_vector(struct page **pages,
302 const void *data,
303 loff_t off, size_t len);
304extern void ceph_copy_from_page_vector(struct page **pages,
305 void *data,
306 loff_t off, size_t len);
307extern void ceph_zero_page_vector_range(int off, int len, struct page **pages);
308
309
310#endif
311