1 #ifndef _FS_CEPH_LIBCEPH_H
2 #define _FS_CEPH_LIBCEPH_H
4 #include <linux/ceph/ceph_debug.h>
6 #include <asm/unaligned.h>
7 #include <linux/backing-dev.h>
8 #include <linux/completion.h>
9 #include <linux/exportfs.h>
10 #include <linux/bug.h>
12 #include <linux/mempool.h>
13 #include <linux/pagemap.h>
14 #include <linux/wait.h>
15 #include <linux/writeback.h>
16 #include <linux/slab.h>
18 #include <linux/ceph/types.h>
19 #include <linux/ceph/messenger.h>
20 #include <linux/ceph/msgpool.h>
21 #include <linux/ceph/mon_client.h>
22 #include <linux/ceph/osd_client.h>
23 #include <linux/ceph/ceph_fs.h>
28 #define CEPH_OPT_FSID (1<<0)
29 #define CEPH_OPT_NOSHARE (1<<1) /* don't share client with other sbs */
30 #define CEPH_OPT_MYIP (1<<2) /* specified my ip */
31 #define CEPH_OPT_NOCRC (1<<3) /* no data crc on writes */
33 #define CEPH_OPT_DEFAULT (0)
35 #define ceph_set_opt(client, opt) \
36 (client)->options->flags |= CEPH_OPT_##opt;
37 #define ceph_test_opt(client, opt) \
38 (!!((client)->options->flags & CEPH_OPT_##opt))
42 struct ceph_fsid fsid
;
43 struct ceph_entity_addr my_addr
;
46 int osd_keepalive_timeout
;
49 * any type that can't be simply compared or doesn't need need
50 * to be compared should go beyond this point,
51 * ceph_compare_options() should be updated accordingly
54 struct ceph_entity_addr
*mon_addr
; /* should be the first
55 pointer type of args */
58 struct ceph_crypto_key
*key
;
64 #define CEPH_MOUNT_TIMEOUT_DEFAULT 60
65 #define CEPH_OSD_KEEPALIVE_DEFAULT 5
66 #define CEPH_OSD_IDLE_TTL_DEFAULT 60
68 #define CEPH_MSG_MAX_FRONT_LEN (16*1024*1024)
69 #define CEPH_MSG_MAX_MIDDLE_LEN (16*1024*1024)
70 #define CEPH_MSG_MAX_DATA_LEN (16*1024*1024)
72 #define CEPH_AUTH_NAME_DEFAULT "guest"
75 * Delay telling the MDS we no longer want caps, in case we reopen
76 * the file. Delay a minimum amount of time, even if we send a cap
77 * message for some other reason. Otherwise, take the oppotunity to
78 * update the mds to avoid sending another message later.
80 #define CEPH_CAPS_WANTED_DELAY_MIN_DEFAULT 5 /* cap release delay */
81 #define CEPH_CAPS_WANTED_DELAY_MAX_DEFAULT 60 /* cap release delay */
83 #define CEPH_CAP_RELEASE_SAFETY_DEFAULT (CEPH_CAPS_PER_RELEASE * 4)
89 CEPH_MOUNT_UNMOUNTING
,
97 static inline unsigned long time_sub(unsigned long a
, unsigned long b
)
99 BUG_ON(time_after(b
, a
));
100 return (long)a
- (long)b
;
103 struct ceph_mds_client
;
108 * possibly shared by multiple mount points, if they are
109 * mounting the same ceph filesystem/cluster.
112 struct ceph_fsid fsid
;
117 struct ceph_options
*options
;
119 struct mutex mount_mutex
; /* serialize mount attempts */
120 wait_queue_head_t auth_wq
;
123 int (*extra_mon_dispatch
)(struct ceph_client
*, struct ceph_msg
*);
125 u64 supported_features
;
126 u64 required_features
;
128 struct ceph_messenger msgr
; /* messenger instance */
129 struct ceph_mon_client monc
;
130 struct ceph_osd_client osdc
;
132 #ifdef CONFIG_DEBUG_FS
133 struct dentry
*debugfs_dir
;
134 struct dentry
*debugfs_monmap
;
135 struct dentry
*debugfs_osdmap
;
146 * A "snap context" is the set of existing snapshots when we
147 * write data. It is used by the OSD to guide its COW behavior.
149 * The ceph_snap_context is refcounted, and attached to each dirty
150 * page, indicating which context the dirty data belonged when it was
153 struct ceph_snap_context
{
160 extern struct ceph_snap_context
*ceph_create_snap_context(u32 snap_count
,
162 extern struct ceph_snap_context
*ceph_get_snap_context(
163 struct ceph_snap_context
*sc
);
164 extern void ceph_put_snap_context(struct ceph_snap_context
*sc
);
167 * calculate the number of pages a given length and offset map onto,
168 * if we align the data.
170 static inline int calc_pages_for(u64 off
, u64 len
)
172 return ((off
+len
+PAGE_CACHE_SIZE
-1) >> PAGE_CACHE_SHIFT
) -
173 (off
>> PAGE_CACHE_SHIFT
);
176 extern struct kmem_cache
*ceph_inode_cachep
;
177 extern struct kmem_cache
*ceph_cap_cachep
;
178 extern struct kmem_cache
*ceph_dentry_cachep
;
179 extern struct kmem_cache
*ceph_file_cachep
;
182 extern bool libceph_compatible(void *data
);
184 extern const char *ceph_msg_type_name(int type
);
185 extern int ceph_check_fsid(struct ceph_client
*client
, struct ceph_fsid
*fsid
);
186 extern void *ceph_kvmalloc(size_t size
, gfp_t flags
);
187 extern void ceph_kvfree(const void *ptr
);
189 extern struct ceph_options
*ceph_parse_options(char *options
,
190 const char *dev_name
, const char *dev_name_end
,
191 int (*parse_extra_token
)(char *c
, void *private),
193 extern void ceph_destroy_options(struct ceph_options
*opt
);
194 extern int ceph_compare_options(struct ceph_options
*new_opt
,
195 struct ceph_client
*client
);
196 extern struct ceph_client
*ceph_create_client(struct ceph_options
*opt
,
198 u64 supported_features
,
199 u64 required_features
);
200 extern u64
ceph_client_id(struct ceph_client
*client
);
201 extern void ceph_destroy_client(struct ceph_client
*client
);
202 extern int __ceph_open_session(struct ceph_client
*client
,
203 unsigned long started
);
204 extern int ceph_open_session(struct ceph_client
*client
);
207 extern void ceph_release_page_vector(struct page
**pages
, int num_pages
);
209 extern struct page
**ceph_get_direct_page_vector(const void __user
*data
,
212 extern void ceph_put_page_vector(struct page
**pages
, int num_pages
,
214 extern void ceph_release_page_vector(struct page
**pages
, int num_pages
);
215 extern struct page
**ceph_alloc_page_vector(int num_pages
, gfp_t flags
);
216 extern int ceph_copy_user_to_page_vector(struct page
**pages
,
217 const void __user
*data
,
218 loff_t off
, size_t len
);
219 extern void ceph_copy_to_page_vector(struct page
**pages
,
221 loff_t off
, size_t len
);
222 extern void ceph_copy_from_page_vector(struct page
**pages
,
224 loff_t off
, size_t len
);
225 extern int ceph_copy_page_vector_to_user(struct page
**pages
, void __user
*data
,
226 loff_t off
, size_t len
);
227 extern void ceph_zero_page_vector_range(int off
, int len
, struct page
**pages
);
230 #endif /* _FS_CEPH_SUPER_H */