]>
Commit | Line | Data |
---|---|---|
1 | #ifndef _FS_CEPH_LIBCEPH_H | |
2 | #define _FS_CEPH_LIBCEPH_H | |
3 | ||
4 | #include <linux/ceph/ceph_debug.h> | |
5 | ||
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> | |
11 | #include <linux/fs.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> | |
17 | ||
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> | |
24 | ||
25 | /* | |
26 | * mount options | |
27 | */ | |
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 */ | |
32 | #define CEPH_OPT_NOMSGAUTH (1<<4) /* don't require msg signing feat */ | |
33 | #define CEPH_OPT_TCP_NODELAY (1<<5) /* TCP_NODELAY on TCP sockets */ | |
34 | #define CEPH_OPT_NOMSGSIGN (1<<6) /* don't sign msgs */ | |
35 | ||
36 | #define CEPH_OPT_DEFAULT (CEPH_OPT_TCP_NODELAY) | |
37 | ||
38 | #define ceph_set_opt(client, opt) \ | |
39 | (client)->options->flags |= CEPH_OPT_##opt; | |
40 | #define ceph_test_opt(client, opt) \ | |
41 | (!!((client)->options->flags & CEPH_OPT_##opt)) | |
42 | ||
43 | struct ceph_options { | |
44 | int flags; | |
45 | struct ceph_fsid fsid; | |
46 | struct ceph_entity_addr my_addr; | |
47 | unsigned long mount_timeout; /* jiffies */ | |
48 | unsigned long osd_idle_ttl; /* jiffies */ | |
49 | unsigned long osd_keepalive_timeout; /* jiffies */ | |
50 | ||
51 | /* | |
52 | * any type that can't be simply compared or doesn't need need | |
53 | * to be compared should go beyond this point, | |
54 | * ceph_compare_options() should be updated accordingly | |
55 | */ | |
56 | ||
57 | struct ceph_entity_addr *mon_addr; /* should be the first | |
58 | pointer type of args */ | |
59 | int num_mon; | |
60 | char *name; | |
61 | struct ceph_crypto_key *key; | |
62 | }; | |
63 | ||
64 | /* | |
65 | * defaults | |
66 | */ | |
67 | #define CEPH_MOUNT_TIMEOUT_DEFAULT msecs_to_jiffies(60 * 1000) | |
68 | #define CEPH_OSD_KEEPALIVE_DEFAULT msecs_to_jiffies(5 * 1000) | |
69 | #define CEPH_OSD_IDLE_TTL_DEFAULT msecs_to_jiffies(60 * 1000) | |
70 | ||
71 | #define CEPH_MONC_HUNT_INTERVAL msecs_to_jiffies(3 * 1000) | |
72 | #define CEPH_MONC_PING_INTERVAL msecs_to_jiffies(10 * 1000) | |
73 | #define CEPH_MONC_PING_TIMEOUT msecs_to_jiffies(30 * 1000) | |
74 | #define CEPH_MONC_HUNT_BACKOFF 2 | |
75 | #define CEPH_MONC_HUNT_MAX_MULT 10 | |
76 | ||
77 | #define CEPH_MSG_MAX_FRONT_LEN (16*1024*1024) | |
78 | #define CEPH_MSG_MAX_MIDDLE_LEN (16*1024*1024) | |
79 | #define CEPH_MSG_MAX_DATA_LEN (16*1024*1024) | |
80 | ||
81 | #define CEPH_AUTH_NAME_DEFAULT "guest" | |
82 | ||
83 | /* | |
84 | * Delay telling the MDS we no longer want caps, in case we reopen | |
85 | * the file. Delay a minimum amount of time, even if we send a cap | |
86 | * message for some other reason. Otherwise, take the oppotunity to | |
87 | * update the mds to avoid sending another message later. | |
88 | */ | |
89 | #define CEPH_CAPS_WANTED_DELAY_MIN_DEFAULT 5 /* cap release delay */ | |
90 | #define CEPH_CAPS_WANTED_DELAY_MAX_DEFAULT 60 /* cap release delay */ | |
91 | ||
92 | #define CEPH_CAP_RELEASE_SAFETY_DEFAULT (CEPH_CAPS_PER_RELEASE * 4) | |
93 | ||
94 | /* mount state */ | |
95 | enum { | |
96 | CEPH_MOUNT_MOUNTING, | |
97 | CEPH_MOUNT_MOUNTED, | |
98 | CEPH_MOUNT_UNMOUNTING, | |
99 | CEPH_MOUNT_UNMOUNTED, | |
100 | CEPH_MOUNT_SHUTDOWN, | |
101 | }; | |
102 | ||
103 | static inline unsigned long ceph_timeout_jiffies(unsigned long timeout) | |
104 | { | |
105 | return timeout ?: MAX_SCHEDULE_TIMEOUT; | |
106 | } | |
107 | ||
108 | struct ceph_mds_client; | |
109 | ||
110 | /* | |
111 | * per client state | |
112 | * | |
113 | * possibly shared by multiple mount points, if they are | |
114 | * mounting the same ceph filesystem/cluster. | |
115 | */ | |
116 | struct ceph_client { | |
117 | struct ceph_fsid fsid; | |
118 | bool have_fsid; | |
119 | ||
120 | void *private; | |
121 | ||
122 | struct ceph_options *options; | |
123 | ||
124 | struct mutex mount_mutex; /* serialize mount attempts */ | |
125 | wait_queue_head_t auth_wq; | |
126 | int auth_err; | |
127 | ||
128 | int (*extra_mon_dispatch)(struct ceph_client *, struct ceph_msg *); | |
129 | ||
130 | u64 supported_features; | |
131 | u64 required_features; | |
132 | ||
133 | struct ceph_messenger msgr; /* messenger instance */ | |
134 | struct ceph_mon_client monc; | |
135 | struct ceph_osd_client osdc; | |
136 | ||
137 | #ifdef CONFIG_DEBUG_FS | |
138 | struct dentry *debugfs_dir; | |
139 | struct dentry *debugfs_monmap; | |
140 | struct dentry *debugfs_osdmap; | |
141 | struct dentry *debugfs_options; | |
142 | #endif | |
143 | }; | |
144 | ||
145 | #define from_msgr(ms) container_of(ms, struct ceph_client, msgr) | |
146 | ||
147 | ||
148 | /* | |
149 | * snapshots | |
150 | */ | |
151 | ||
152 | /* | |
153 | * A "snap context" is the set of existing snapshots when we | |
154 | * write data. It is used by the OSD to guide its COW behavior. | |
155 | * | |
156 | * The ceph_snap_context is refcounted, and attached to each dirty | |
157 | * page, indicating which context the dirty data belonged when it was | |
158 | * dirtied. | |
159 | */ | |
160 | struct ceph_snap_context { | |
161 | atomic_t nref; | |
162 | u64 seq; | |
163 | u32 num_snaps; | |
164 | u64 snaps[]; | |
165 | }; | |
166 | ||
167 | extern struct ceph_snap_context *ceph_create_snap_context(u32 snap_count, | |
168 | gfp_t gfp_flags); | |
169 | extern struct ceph_snap_context *ceph_get_snap_context( | |
170 | struct ceph_snap_context *sc); | |
171 | extern void ceph_put_snap_context(struct ceph_snap_context *sc); | |
172 | ||
173 | /* | |
174 | * calculate the number of pages a given length and offset map onto, | |
175 | * if we align the data. | |
176 | */ | |
177 | static inline int calc_pages_for(u64 off, u64 len) | |
178 | { | |
179 | return ((off+len+PAGE_SIZE-1) >> PAGE_SHIFT) - | |
180 | (off >> PAGE_SHIFT); | |
181 | } | |
182 | ||
183 | extern struct kmem_cache *ceph_inode_cachep; | |
184 | extern struct kmem_cache *ceph_cap_cachep; | |
185 | extern struct kmem_cache *ceph_cap_flush_cachep; | |
186 | extern struct kmem_cache *ceph_dentry_cachep; | |
187 | extern struct kmem_cache *ceph_file_cachep; | |
188 | ||
189 | /* ceph_common.c */ | |
190 | extern bool libceph_compatible(void *data); | |
191 | ||
192 | extern const char *ceph_msg_type_name(int type); | |
193 | extern int ceph_check_fsid(struct ceph_client *client, struct ceph_fsid *fsid); | |
194 | extern void *ceph_kvmalloc(size_t size, gfp_t flags); | |
195 | ||
196 | extern struct ceph_options *ceph_parse_options(char *options, | |
197 | const char *dev_name, const char *dev_name_end, | |
198 | int (*parse_extra_token)(char *c, void *private), | |
199 | void *private); | |
200 | int ceph_print_client_options(struct seq_file *m, struct ceph_client *client); | |
201 | extern void ceph_destroy_options(struct ceph_options *opt); | |
202 | extern int ceph_compare_options(struct ceph_options *new_opt, | |
203 | struct ceph_client *client); | |
204 | extern struct ceph_client *ceph_create_client(struct ceph_options *opt, | |
205 | void *private, | |
206 | u64 supported_features, | |
207 | u64 required_features); | |
208 | extern u64 ceph_client_id(struct ceph_client *client); | |
209 | extern void ceph_destroy_client(struct ceph_client *client); | |
210 | extern int __ceph_open_session(struct ceph_client *client, | |
211 | unsigned long started); | |
212 | extern int ceph_open_session(struct ceph_client *client); | |
213 | ||
214 | /* pagevec.c */ | |
215 | extern void ceph_release_page_vector(struct page **pages, int num_pages); | |
216 | ||
217 | extern struct page **ceph_get_direct_page_vector(const void __user *data, | |
218 | int num_pages, | |
219 | bool write_page); | |
220 | extern void ceph_put_page_vector(struct page **pages, int num_pages, | |
221 | bool dirty); | |
222 | extern struct page **ceph_alloc_page_vector(int num_pages, gfp_t flags); | |
223 | extern int ceph_copy_user_to_page_vector(struct page **pages, | |
224 | const void __user *data, | |
225 | loff_t off, size_t len); | |
226 | extern void ceph_copy_to_page_vector(struct page **pages, | |
227 | const void *data, | |
228 | loff_t off, size_t len); | |
229 | extern void ceph_copy_from_page_vector(struct page **pages, | |
230 | void *data, | |
231 | loff_t off, size_t len); | |
232 | extern void ceph_zero_page_vector_range(int off, int len, struct page **pages); | |
233 | ||
234 | ||
235 | #endif /* _FS_CEPH_SUPER_H */ |