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3d14c5d2 YS |
1 | #ifndef _FS_CEPH_LIBCEPH_H |
2 | #define _FS_CEPH_LIBCEPH_H | |
3 | ||
a1ce3928 | 4 | #include <linux/ceph/ceph_debug.h> |
3d14c5d2 YS |
5 | |
6 | #include <asm/unaligned.h> | |
7 | #include <linux/backing-dev.h> | |
8 | #include <linux/completion.h> | |
9 | #include <linux/exportfs.h> | |
187f1882 | 10 | #include <linux/bug.h> |
3d14c5d2 YS |
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 | ||
a1ce3928 DH |
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> | |
3d14c5d2 | 24 | |
3d14c5d2 YS |
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 */ | |
a3fc9800 | 32 | #define CEPH_OPT_NOMSGAUTH (1<<4) /* not require cephx message signature */ |
ba988f87 | 33 | #define CEPH_OPT_TCP_NODELAY (1<<5) /* TCP_NODELAY on TCP sockets */ |
3d14c5d2 | 34 | |
ba988f87 | 35 | #define CEPH_OPT_DEFAULT (CEPH_OPT_TCP_NODELAY) |
3d14c5d2 YS |
36 | |
37 | #define ceph_set_opt(client, opt) \ | |
38 | (client)->options->flags |= CEPH_OPT_##opt; | |
39 | #define ceph_test_opt(client, opt) \ | |
40 | (!!((client)->options->flags & CEPH_OPT_##opt)) | |
41 | ||
42 | struct ceph_options { | |
43 | int flags; | |
44 | struct ceph_fsid fsid; | |
45 | struct ceph_entity_addr my_addr; | |
46 | int mount_timeout; | |
47 | int osd_idle_ttl; | |
3d14c5d2 YS |
48 | int osd_keepalive_timeout; |
49 | ||
50 | /* | |
51 | * any type that can't be simply compared or doesn't need need | |
52 | * to be compared should go beyond this point, | |
53 | * ceph_compare_options() should be updated accordingly | |
54 | */ | |
55 | ||
56 | struct ceph_entity_addr *mon_addr; /* should be the first | |
57 | pointer type of args */ | |
58 | int num_mon; | |
59 | char *name; | |
8323c3aa | 60 | struct ceph_crypto_key *key; |
3d14c5d2 YS |
61 | }; |
62 | ||
63 | /* | |
64 | * defaults | |
65 | */ | |
66 | #define CEPH_MOUNT_TIMEOUT_DEFAULT 60 | |
3d14c5d2 YS |
67 | #define CEPH_OSD_KEEPALIVE_DEFAULT 5 |
68 | #define CEPH_OSD_IDLE_TTL_DEFAULT 60 | |
3d14c5d2 YS |
69 | |
70 | #define CEPH_MSG_MAX_FRONT_LEN (16*1024*1024) | |
7b11ba37 | 71 | #define CEPH_MSG_MAX_MIDDLE_LEN (16*1024*1024) |
3d14c5d2 YS |
72 | #define CEPH_MSG_MAX_DATA_LEN (16*1024*1024) |
73 | ||
74 | #define CEPH_AUTH_NAME_DEFAULT "guest" | |
75 | ||
76 | /* | |
77 | * Delay telling the MDS we no longer want caps, in case we reopen | |
78 | * the file. Delay a minimum amount of time, even if we send a cap | |
79 | * message for some other reason. Otherwise, take the oppotunity to | |
80 | * update the mds to avoid sending another message later. | |
81 | */ | |
82 | #define CEPH_CAPS_WANTED_DELAY_MIN_DEFAULT 5 /* cap release delay */ | |
83 | #define CEPH_CAPS_WANTED_DELAY_MAX_DEFAULT 60 /* cap release delay */ | |
84 | ||
85 | #define CEPH_CAP_RELEASE_SAFETY_DEFAULT (CEPH_CAPS_PER_RELEASE * 4) | |
86 | ||
87 | /* mount state */ | |
88 | enum { | |
89 | CEPH_MOUNT_MOUNTING, | |
90 | CEPH_MOUNT_MOUNTED, | |
91 | CEPH_MOUNT_UNMOUNTING, | |
92 | CEPH_MOUNT_UNMOUNTED, | |
93 | CEPH_MOUNT_SHUTDOWN, | |
94 | }; | |
95 | ||
96 | /* | |
97 | * subtract jiffies | |
98 | */ | |
99 | static inline unsigned long time_sub(unsigned long a, unsigned long b) | |
100 | { | |
101 | BUG_ON(time_after(b, a)); | |
102 | return (long)a - (long)b; | |
103 | } | |
104 | ||
105 | struct ceph_mds_client; | |
106 | ||
107 | /* | |
108 | * per client state | |
109 | * | |
110 | * possibly shared by multiple mount points, if they are | |
111 | * mounting the same ceph filesystem/cluster. | |
112 | */ | |
113 | struct ceph_client { | |
114 | struct ceph_fsid fsid; | |
115 | bool have_fsid; | |
116 | ||
117 | void *private; | |
118 | ||
119 | struct ceph_options *options; | |
120 | ||
121 | struct mutex mount_mutex; /* serialize mount attempts */ | |
122 | wait_queue_head_t auth_wq; | |
123 | int auth_err; | |
124 | ||
125 | int (*extra_mon_dispatch)(struct ceph_client *, struct ceph_msg *); | |
126 | ||
12b4629a ID |
127 | u64 supported_features; |
128 | u64 required_features; | |
3d14c5d2 | 129 | |
15d9882c | 130 | struct ceph_messenger msgr; /* messenger instance */ |
3d14c5d2 YS |
131 | struct ceph_mon_client monc; |
132 | struct ceph_osd_client osdc; | |
133 | ||
134 | #ifdef CONFIG_DEBUG_FS | |
135 | struct dentry *debugfs_dir; | |
136 | struct dentry *debugfs_monmap; | |
137 | struct dentry *debugfs_osdmap; | |
138 | #endif | |
139 | }; | |
140 | ||
141 | ||
142 | ||
143 | /* | |
144 | * snapshots | |
145 | */ | |
146 | ||
147 | /* | |
148 | * A "snap context" is the set of existing snapshots when we | |
149 | * write data. It is used by the OSD to guide its COW behavior. | |
150 | * | |
151 | * The ceph_snap_context is refcounted, and attached to each dirty | |
152 | * page, indicating which context the dirty data belonged when it was | |
153 | * dirtied. | |
154 | */ | |
155 | struct ceph_snap_context { | |
156 | atomic_t nref; | |
157 | u64 seq; | |
aa711ee3 | 158 | u32 num_snaps; |
3d14c5d2 YS |
159 | u64 snaps[]; |
160 | }; | |
161 | ||
4f0dcb10 AE |
162 | extern struct ceph_snap_context *ceph_create_snap_context(u32 snap_count, |
163 | gfp_t gfp_flags); | |
164 | extern struct ceph_snap_context *ceph_get_snap_context( | |
165 | struct ceph_snap_context *sc); | |
166 | extern void ceph_put_snap_context(struct ceph_snap_context *sc); | |
3d14c5d2 YS |
167 | |
168 | /* | |
169 | * calculate the number of pages a given length and offset map onto, | |
170 | * if we align the data. | |
171 | */ | |
172 | static inline int calc_pages_for(u64 off, u64 len) | |
173 | { | |
174 | return ((off+len+PAGE_CACHE_SIZE-1) >> PAGE_CACHE_SHIFT) - | |
175 | (off >> PAGE_CACHE_SHIFT); | |
176 | } | |
177 | ||
eeb0bed5 ID |
178 | extern struct kmem_cache *ceph_inode_cachep; |
179 | extern struct kmem_cache *ceph_cap_cachep; | |
180 | extern struct kmem_cache *ceph_dentry_cachep; | |
181 | extern struct kmem_cache *ceph_file_cachep; | |
182 | ||
3d14c5d2 | 183 | /* ceph_common.c */ |
72fe25e3 AE |
184 | extern bool libceph_compatible(void *data); |
185 | ||
3d14c5d2 YS |
186 | extern const char *ceph_msg_type_name(int type); |
187 | extern int ceph_check_fsid(struct ceph_client *client, struct ceph_fsid *fsid); | |
eeb0bed5 | 188 | extern void *ceph_kvmalloc(size_t size, gfp_t flags); |
3d14c5d2 | 189 | |
ee57741c | 190 | extern struct ceph_options *ceph_parse_options(char *options, |
3d14c5d2 YS |
191 | const char *dev_name, const char *dev_name_end, |
192 | int (*parse_extra_token)(char *c, void *private), | |
193 | void *private); | |
ff40f9ae | 194 | int ceph_print_client_options(struct seq_file *m, struct ceph_client *client); |
3d14c5d2 YS |
195 | extern void ceph_destroy_options(struct ceph_options *opt); |
196 | extern int ceph_compare_options(struct ceph_options *new_opt, | |
197 | struct ceph_client *client); | |
198 | extern struct ceph_client *ceph_create_client(struct ceph_options *opt, | |
6ab00d46 | 199 | void *private, |
12b4629a ID |
200 | u64 supported_features, |
201 | u64 required_features); | |
3d14c5d2 YS |
202 | extern u64 ceph_client_id(struct ceph_client *client); |
203 | extern void ceph_destroy_client(struct ceph_client *client); | |
204 | extern int __ceph_open_session(struct ceph_client *client, | |
205 | unsigned long started); | |
206 | extern int ceph_open_session(struct ceph_client *client); | |
207 | ||
208 | /* pagevec.c */ | |
209 | extern void ceph_release_page_vector(struct page **pages, int num_pages); | |
210 | ||
b324814e | 211 | extern struct page **ceph_get_direct_page_vector(const void __user *data, |
b6aa5901 HC |
212 | int num_pages, |
213 | bool write_page); | |
214 | extern void ceph_put_page_vector(struct page **pages, int num_pages, | |
215 | bool dirty); | |
3d14c5d2 YS |
216 | extern struct page **ceph_alloc_page_vector(int num_pages, gfp_t flags); |
217 | extern int ceph_copy_user_to_page_vector(struct page **pages, | |
b324814e | 218 | const void __user *data, |
3d14c5d2 | 219 | loff_t off, size_t len); |
903bb32e | 220 | extern void ceph_copy_to_page_vector(struct page **pages, |
b324814e | 221 | const void *data, |
3d14c5d2 | 222 | loff_t off, size_t len); |
903bb32e | 223 | extern void ceph_copy_from_page_vector(struct page **pages, |
b324814e | 224 | void *data, |
3d14c5d2 | 225 | loff_t off, size_t len); |
3d14c5d2 YS |
226 | extern void ceph_zero_page_vector_range(int off, int len, struct page **pages); |
227 | ||
228 | ||
229 | #endif /* _FS_CEPH_SUPER_H */ |