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 (msgr1) */
35 #define CEPH_OPT_TCP_NODELAY (1<<4) /* TCP_NODELAY on TCP sockets */
36 #define CEPH_OPT_NOMSGSIGN (1<<5) /* don't sign msgs (msgr1) */
37 #define CEPH_OPT_ABORT_ON_FULL (1<<6) /* abort w/ ENOSPC when full */
38 #define CEPH_OPT_RXBOUNCE (1<<7) /* double-buffer read data */
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 */
55 u32 read_from_replica; /* CEPH_OSD_FLAG_BALANCE/LOCALIZE_READS */
56 int con_modes[2]; /* CEPH_CON_MODE_* */
59 * any type that can't be simply compared or doesn't need
60 * to be compared should go beyond this point,
61 * ceph_compare_options() should be updated accordingly
64 struct ceph_entity_addr *mon_addr; /* should be the first
65 pointer type of args */
68 struct ceph_crypto_key *key;
69 struct rb_root crush_locs;
75 #define CEPH_MOUNT_TIMEOUT_DEFAULT msecs_to_jiffies(60 * 1000)
76 #define CEPH_OSD_KEEPALIVE_DEFAULT msecs_to_jiffies(5 * 1000)
77 #define CEPH_OSD_IDLE_TTL_DEFAULT msecs_to_jiffies(60 * 1000)
78 #define CEPH_OSD_REQUEST_TIMEOUT_DEFAULT 0 /* no timeout */
79 #define CEPH_READ_FROM_REPLICA_DEFAULT 0 /* read from primary */
81 #define CEPH_MONC_HUNT_INTERVAL msecs_to_jiffies(3 * 1000)
82 #define CEPH_MONC_PING_INTERVAL msecs_to_jiffies(10 * 1000)
83 #define CEPH_MONC_PING_TIMEOUT msecs_to_jiffies(30 * 1000)
84 #define CEPH_MONC_HUNT_BACKOFF 2
85 #define CEPH_MONC_HUNT_MAX_MULT 10
87 #define CEPH_MSG_MAX_CONTROL_LEN (16*1024*1024)
88 #define CEPH_MSG_MAX_FRONT_LEN (16*1024*1024)
89 #define CEPH_MSG_MAX_MIDDLE_LEN (16*1024*1024)
92 * The largest possible rbd data object is 32M.
93 * The largest possible rbd object map object is 64M.
95 * There is no limit on the size of cephfs objects, but it has to obey
96 * rsize and wsize mount options anyway.
98 #define CEPH_MSG_MAX_DATA_LEN (64*1024*1024)
100 #define CEPH_AUTH_NAME_DEFAULT "guest"
106 CEPH_MOUNT_UNMOUNTING,
107 CEPH_MOUNT_UNMOUNTED,
112 static inline unsigned long ceph_timeout_jiffies(unsigned long timeout)
114 return timeout ?: MAX_SCHEDULE_TIMEOUT;
117 struct ceph_mds_client;
122 * possibly shared by multiple mount points, if they are
123 * mounting the same ceph filesystem/cluster.
126 struct ceph_fsid fsid;
131 struct ceph_options *options;
133 struct mutex mount_mutex; /* serialize mount attempts */
134 wait_queue_head_t auth_wq;
137 int (*extra_mon_dispatch)(struct ceph_client *, struct ceph_msg *);
139 u64 supported_features;
140 u64 required_features;
142 struct ceph_messenger msgr; /* messenger instance */
143 struct ceph_mon_client monc;
144 struct ceph_osd_client osdc;
146 #ifdef CONFIG_DEBUG_FS
147 struct dentry *debugfs_dir;
148 struct dentry *debugfs_monmap;
149 struct dentry *debugfs_osdmap;
150 struct dentry *debugfs_options;
154 #define from_msgr(ms) container_of(ms, struct ceph_client, msgr)
156 static inline bool ceph_msgr2(struct ceph_client *client)
158 return client->options->con_modes[0] != CEPH_CON_MODE_UNKNOWN;
166 * A "snap context" is the set of existing snapshots when we
167 * write data. It is used by the OSD to guide its COW behavior.
169 * The ceph_snap_context is refcounted, and attached to each dirty
170 * page, indicating which context the dirty data belonged when it was
173 struct ceph_snap_context {
180 extern struct ceph_snap_context *ceph_create_snap_context(u32 snap_count,
182 extern struct ceph_snap_context *ceph_get_snap_context(
183 struct ceph_snap_context *sc);
184 extern void ceph_put_snap_context(struct ceph_snap_context *sc);
187 * calculate the number of pages a given length and offset map onto,
188 * if we align the data.
190 static inline int calc_pages_for(u64 off, u64 len)
192 return ((off+len+PAGE_SIZE-1) >> PAGE_SHIFT) -
196 #define RB_BYVAL(a) (a)
197 #define RB_BYPTR(a) (&(a))
198 #define RB_CMP3WAY(a, b) ((a) < (b) ? -1 : (a) > (b))
200 #define DEFINE_RB_INSDEL_FUNCS2(name, type, keyfld, cmpexp, keyexp, nodefld) \
201 static bool __insert_##name(struct rb_root *root, type *t) \
203 struct rb_node **n = &root->rb_node; \
204 struct rb_node *parent = NULL; \
206 BUG_ON(!RB_EMPTY_NODE(&t->nodefld)); \
209 type *cur = rb_entry(*n, type, nodefld); \
213 cmp = cmpexp(keyexp(t->keyfld), keyexp(cur->keyfld)); \
215 n = &(*n)->rb_left; \
217 n = &(*n)->rb_right; \
222 rb_link_node(&t->nodefld, parent, n); \
223 rb_insert_color(&t->nodefld, root); \
226 static void __maybe_unused insert_##name(struct rb_root *root, type *t) \
228 if (!__insert_##name(root, t)) \
231 static void erase_##name(struct rb_root *root, type *t) \
233 BUG_ON(RB_EMPTY_NODE(&t->nodefld)); \
234 rb_erase(&t->nodefld, root); \
235 RB_CLEAR_NODE(&t->nodefld); \
239 * @lookup_param_type is a parameter and not constructed from (@type,
240 * @keyfld) with typeof() because adding const is too unwieldy.
242 #define DEFINE_RB_LOOKUP_FUNC2(name, type, keyfld, cmpexp, keyexp, \
243 lookup_param_type, nodefld) \
244 static type *lookup_##name(struct rb_root *root, lookup_param_type key) \
246 struct rb_node *n = root->rb_node; \
249 type *cur = rb_entry(n, type, nodefld); \
252 cmp = cmpexp(key, keyexp(cur->keyfld)); \
264 #define DEFINE_RB_FUNCS2(name, type, keyfld, cmpexp, keyexp, \
265 lookup_param_type, nodefld) \
266 DEFINE_RB_INSDEL_FUNCS2(name, type, keyfld, cmpexp, keyexp, nodefld) \
267 DEFINE_RB_LOOKUP_FUNC2(name, type, keyfld, cmpexp, keyexp, \
268 lookup_param_type, nodefld)
271 * Shorthands for integer keys.
273 #define DEFINE_RB_INSDEL_FUNCS(name, type, keyfld, nodefld) \
274 DEFINE_RB_INSDEL_FUNCS2(name, type, keyfld, RB_CMP3WAY, RB_BYVAL, nodefld)
276 #define DEFINE_RB_LOOKUP_FUNC(name, type, keyfld, nodefld) \
277 extern type __lookup_##name##_key; \
278 DEFINE_RB_LOOKUP_FUNC2(name, type, keyfld, RB_CMP3WAY, RB_BYVAL, \
279 typeof(__lookup_##name##_key.keyfld), nodefld)
281 #define DEFINE_RB_FUNCS(name, type, keyfld, nodefld) \
282 DEFINE_RB_INSDEL_FUNCS(name, type, keyfld, nodefld) \
283 DEFINE_RB_LOOKUP_FUNC(name, type, keyfld, nodefld)
285 extern struct kmem_cache *ceph_inode_cachep;
286 extern struct kmem_cache *ceph_cap_cachep;
287 extern struct kmem_cache *ceph_cap_snap_cachep;
288 extern struct kmem_cache *ceph_cap_flush_cachep;
289 extern struct kmem_cache *ceph_dentry_cachep;
290 extern struct kmem_cache *ceph_file_cachep;
291 extern struct kmem_cache *ceph_dir_file_cachep;
292 extern struct kmem_cache *ceph_mds_request_cachep;
293 extern mempool_t *ceph_wb_pagevec_pool;
296 extern bool libceph_compatible(void *data);
298 extern const char *ceph_msg_type_name(int type);
299 extern int ceph_check_fsid(struct ceph_client *client, struct ceph_fsid *fsid);
300 extern int ceph_parse_fsid(const char *str, struct ceph_fsid *fsid);
304 struct ceph_options *ceph_alloc_options(void);
305 int ceph_parse_mon_ips(const char *buf, size_t len, struct ceph_options *opt,
306 struct fc_log *l, char delim);
307 int ceph_parse_param(struct fs_parameter *param, struct ceph_options *opt,
309 int ceph_print_client_options(struct seq_file *m, struct ceph_client *client,
311 extern void ceph_destroy_options(struct ceph_options *opt);
312 extern int ceph_compare_options(struct ceph_options *new_opt,
313 struct ceph_client *client);
314 struct ceph_client *ceph_create_client(struct ceph_options *opt, void *private);
315 struct ceph_entity_addr *ceph_client_addr(struct ceph_client *client);
316 u64 ceph_client_gid(struct ceph_client *client);
317 extern void ceph_destroy_client(struct ceph_client *client);
318 extern void ceph_reset_client_addr(struct ceph_client *client);
319 extern int __ceph_open_session(struct ceph_client *client,
320 unsigned long started);
321 extern int ceph_open_session(struct ceph_client *client);
322 int ceph_wait_for_latest_osdmap(struct ceph_client *client,
323 unsigned long timeout);
326 extern void ceph_release_page_vector(struct page **pages, int num_pages);
327 extern void ceph_put_page_vector(struct page **pages, int num_pages,
329 extern struct page **ceph_alloc_page_vector(int num_pages, gfp_t flags);
330 extern int ceph_copy_user_to_page_vector(struct page **pages,
331 const void __user *data,
332 loff_t off, size_t len);
333 extern void ceph_copy_to_page_vector(struct page **pages,
335 loff_t off, size_t len);
336 extern void ceph_copy_from_page_vector(struct page **pages,
338 loff_t off, size_t len);
339 extern void ceph_zero_page_vector_range(int off, int len, struct page **pages);
342 #endif /* _FS_CEPH_SUPER_H */