1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _FS_CEPH_LIBCEPH_H
3 #define _FS_CEPH_LIBCEPH_H
5 #include <linux/ceph/ceph_debug.h>
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>
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>
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>
31 #define CEPH_OPT_FSID (1<<0)
32 #define CEPH_OPT_NOSHARE (1<<1) /* don't share client with other sbs */
33 #define CEPH_OPT_MYIP (1<<2) /* specified my ip */
34 #define CEPH_OPT_NOCRC (1<<3) /* no data crc on writes */
35 #define CEPH_OPT_NOMSGAUTH (1<<4) /* don't require msg signing feat */
36 #define CEPH_OPT_TCP_NODELAY (1<<5) /* TCP_NODELAY on TCP sockets */
37 #define CEPH_OPT_NOMSGSIGN (1<<6) /* don't sign msgs */
38 #define CEPH_OPT_ABORT_ON_FULL (1<<7) /* abort w/ ENOSPC when full */
40 #define CEPH_OPT_DEFAULT (CEPH_OPT_TCP_NODELAY)
42 #define ceph_set_opt(client, opt) \
43 (client)->options->flags |= CEPH_OPT_##opt;
44 #define ceph_test_opt(client, opt) \
45 (!!((client)->options->flags & CEPH_OPT_##opt))
49 struct ceph_fsid fsid;
50 struct ceph_entity_addr my_addr;
51 unsigned long mount_timeout; /* jiffies */
52 unsigned long osd_idle_ttl; /* jiffies */
53 unsigned long osd_keepalive_timeout; /* jiffies */
54 unsigned long osd_request_timeout; /* jiffies */
57 * any type that can't be simply compared or doesn't need
58 * to be compared should go beyond this point,
59 * ceph_compare_options() should be updated accordingly
62 struct ceph_entity_addr *mon_addr; /* should be the first
63 pointer type of args */
66 struct ceph_crypto_key *key;
72 #define CEPH_MOUNT_TIMEOUT_DEFAULT msecs_to_jiffies(60 * 1000)
73 #define CEPH_OSD_KEEPALIVE_DEFAULT msecs_to_jiffies(5 * 1000)
74 #define CEPH_OSD_IDLE_TTL_DEFAULT msecs_to_jiffies(60 * 1000)
75 #define CEPH_OSD_REQUEST_TIMEOUT_DEFAULT 0 /* no timeout */
77 #define CEPH_MONC_HUNT_INTERVAL msecs_to_jiffies(3 * 1000)
78 #define CEPH_MONC_PING_INTERVAL msecs_to_jiffies(10 * 1000)
79 #define CEPH_MONC_PING_TIMEOUT msecs_to_jiffies(30 * 1000)
80 #define CEPH_MONC_HUNT_BACKOFF 2
81 #define CEPH_MONC_HUNT_MAX_MULT 10
83 #define CEPH_MSG_MAX_FRONT_LEN (16*1024*1024)
84 #define CEPH_MSG_MAX_MIDDLE_LEN (16*1024*1024)
87 * The largest possible rbd data object is 32M.
88 * The largest possible rbd object map object is 64M.
90 * There is no limit on the size of cephfs objects, but it has to obey
91 * rsize and wsize mount options anyway.
93 #define CEPH_MSG_MAX_DATA_LEN (64*1024*1024)
95 #define CEPH_AUTH_NAME_DEFAULT "guest"
101 CEPH_MOUNT_UNMOUNTING,
102 CEPH_MOUNT_UNMOUNTED,
106 static inline unsigned long ceph_timeout_jiffies(unsigned long timeout)
108 return timeout ?: MAX_SCHEDULE_TIMEOUT;
111 struct ceph_mds_client;
116 * possibly shared by multiple mount points, if they are
117 * mounting the same ceph filesystem/cluster.
120 struct ceph_fsid fsid;
125 struct ceph_options *options;
127 struct mutex mount_mutex; /* serialize mount attempts */
128 wait_queue_head_t auth_wq;
131 int (*extra_mon_dispatch)(struct ceph_client *, struct ceph_msg *);
133 u64 supported_features;
134 u64 required_features;
136 struct ceph_messenger msgr; /* messenger instance */
137 struct ceph_mon_client monc;
138 struct ceph_osd_client osdc;
140 #ifdef CONFIG_DEBUG_FS
141 struct dentry *debugfs_dir;
142 struct dentry *debugfs_monmap;
143 struct dentry *debugfs_osdmap;
144 struct dentry *debugfs_options;
148 #define from_msgr(ms) container_of(ms, struct ceph_client, msgr)
156 * A "snap context" is the set of existing snapshots when we
157 * write data. It is used by the OSD to guide its COW behavior.
159 * The ceph_snap_context is refcounted, and attached to each dirty
160 * page, indicating which context the dirty data belonged when it was
163 struct ceph_snap_context {
170 extern struct ceph_snap_context *ceph_create_snap_context(u32 snap_count,
172 extern struct ceph_snap_context *ceph_get_snap_context(
173 struct ceph_snap_context *sc);
174 extern void ceph_put_snap_context(struct ceph_snap_context *sc);
177 * calculate the number of pages a given length and offset map onto,
178 * if we align the data.
180 static inline int calc_pages_for(u64 off, u64 len)
182 return ((off+len+PAGE_SIZE-1) >> PAGE_SHIFT) -
186 #define RB_BYVAL(a) (a)
187 #define RB_BYPTR(a) (&(a))
188 #define RB_CMP3WAY(a, b) ((a) < (b) ? -1 : (a) > (b))
190 #define DEFINE_RB_INSDEL_FUNCS2(name, type, keyfld, cmpexp, keyexp, nodefld) \
191 static void insert_##name(struct rb_root *root, type *t) \
193 struct rb_node **n = &root->rb_node; \
194 struct rb_node *parent = NULL; \
196 BUG_ON(!RB_EMPTY_NODE(&t->nodefld)); \
199 type *cur = rb_entry(*n, type, nodefld); \
203 cmp = cmpexp(keyexp(t->keyfld), keyexp(cur->keyfld)); \
205 n = &(*n)->rb_left; \
207 n = &(*n)->rb_right; \
212 rb_link_node(&t->nodefld, parent, n); \
213 rb_insert_color(&t->nodefld, root); \
215 static void erase_##name(struct rb_root *root, type *t) \
217 BUG_ON(RB_EMPTY_NODE(&t->nodefld)); \
218 rb_erase(&t->nodefld, root); \
219 RB_CLEAR_NODE(&t->nodefld); \
223 * @lookup_param_type is a parameter and not constructed from (@type,
224 * @keyfld) with typeof() because adding const is too unwieldy.
226 #define DEFINE_RB_LOOKUP_FUNC2(name, type, keyfld, cmpexp, keyexp, \
227 lookup_param_type, nodefld) \
228 static type *lookup_##name(struct rb_root *root, lookup_param_type key) \
230 struct rb_node *n = root->rb_node; \
233 type *cur = rb_entry(n, type, nodefld); \
236 cmp = cmpexp(key, keyexp(cur->keyfld)); \
248 #define DEFINE_RB_FUNCS2(name, type, keyfld, cmpexp, keyexp, \
249 lookup_param_type, nodefld) \
250 DEFINE_RB_INSDEL_FUNCS2(name, type, keyfld, cmpexp, keyexp, nodefld) \
251 DEFINE_RB_LOOKUP_FUNC2(name, type, keyfld, cmpexp, keyexp, \
252 lookup_param_type, nodefld)
255 * Shorthands for integer keys.
257 #define DEFINE_RB_INSDEL_FUNCS(name, type, keyfld, nodefld) \
258 DEFINE_RB_INSDEL_FUNCS2(name, type, keyfld, RB_CMP3WAY, RB_BYVAL, nodefld)
260 #define DEFINE_RB_LOOKUP_FUNC(name, type, keyfld, nodefld) \
261 extern type __lookup_##name##_key; \
262 DEFINE_RB_LOOKUP_FUNC2(name, type, keyfld, RB_CMP3WAY, RB_BYVAL, \
263 typeof(__lookup_##name##_key.keyfld), nodefld)
265 #define DEFINE_RB_FUNCS(name, type, keyfld, nodefld) \
266 DEFINE_RB_INSDEL_FUNCS(name, type, keyfld, nodefld) \
267 DEFINE_RB_LOOKUP_FUNC(name, type, keyfld, nodefld)
269 extern struct kmem_cache *ceph_inode_cachep;
270 extern struct kmem_cache *ceph_cap_cachep;
271 extern struct kmem_cache *ceph_cap_flush_cachep;
272 extern struct kmem_cache *ceph_dentry_cachep;
273 extern struct kmem_cache *ceph_file_cachep;
274 extern struct kmem_cache *ceph_dir_file_cachep;
277 extern bool libceph_compatible(void *data);
279 extern const char *ceph_msg_type_name(int type);
280 extern int ceph_check_fsid(struct ceph_client *client, struct ceph_fsid *fsid);
281 extern void *ceph_kvmalloc(size_t size, gfp_t flags);
283 extern struct ceph_options *ceph_parse_options(char *options,
284 const char *dev_name, const char *dev_name_end,
285 int (*parse_extra_token)(char *c, void *private),
287 int ceph_print_client_options(struct seq_file *m, struct ceph_client *client,
289 extern void ceph_destroy_options(struct ceph_options *opt);
290 extern int ceph_compare_options(struct ceph_options *new_opt,
291 struct ceph_client *client);
292 struct ceph_client *ceph_create_client(struct ceph_options *opt, void *private);
293 struct ceph_entity_addr *ceph_client_addr(struct ceph_client *client);
294 u64 ceph_client_gid(struct ceph_client *client);
295 extern void ceph_destroy_client(struct ceph_client *client);
296 extern int __ceph_open_session(struct ceph_client *client,
297 unsigned long started);
298 extern int ceph_open_session(struct ceph_client *client);
299 int ceph_wait_for_latest_osdmap(struct ceph_client *client,
300 unsigned long timeout);
303 extern void ceph_release_page_vector(struct page **pages, int num_pages);
304 extern void ceph_put_page_vector(struct page **pages, int num_pages,
306 extern struct page **ceph_alloc_page_vector(int num_pages, gfp_t flags);
307 extern int ceph_copy_user_to_page_vector(struct page **pages,
308 const void __user *data,
309 loff_t off, size_t len);
310 extern void ceph_copy_to_page_vector(struct page **pages,
312 loff_t off, size_t len);
313 extern void ceph_copy_from_page_vector(struct page **pages,
315 loff_t off, size_t len);
316 extern void ceph_zero_page_vector_range(int off, int len, struct page **pages);
319 #endif /* _FS_CEPH_SUPER_H */