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0dee3c28 SW |
1 | #ifndef __RADOS_H |
2 | #define __RADOS_H | |
3 | ||
4 | /* | |
5 | * Data types for the Ceph distributed object storage layer RADOS | |
6 | * (Reliable Autonomic Distributed Object Store). | |
7 | */ | |
8 | ||
9 | #include "msgr.h" | |
10 | ||
11 | /* | |
12 | * fs id | |
13 | */ | |
14 | struct ceph_fsid { | |
15 | unsigned char fsid[16]; | |
16 | }; | |
17 | ||
18 | static inline int ceph_fsid_compare(const struct ceph_fsid *a, | |
19 | const struct ceph_fsid *b) | |
20 | { | |
21 | return memcmp(a, b, sizeof(*a)); | |
22 | } | |
23 | ||
24 | /* | |
25 | * ino, object, etc. | |
26 | */ | |
27 | typedef __le64 ceph_snapid_t; | |
28 | #define CEPH_SNAPDIR ((__u64)(-1)) /* reserved for hidden .snap dir */ | |
29 | #define CEPH_NOSNAP ((__u64)(-2)) /* "head", "live" revision */ | |
30 | #define CEPH_MAXSNAP ((__u64)(-3)) /* largest valid snapid */ | |
31 | ||
32 | struct ceph_timespec { | |
33 | __le32 tv_sec; | |
34 | __le32 tv_nsec; | |
35 | } __attribute__ ((packed)); | |
36 | ||
37 | ||
38 | /* | |
39 | * object layout - how objects are mapped into PGs | |
40 | */ | |
41 | #define CEPH_OBJECT_LAYOUT_HASH 1 | |
42 | #define CEPH_OBJECT_LAYOUT_LINEAR 2 | |
43 | #define CEPH_OBJECT_LAYOUT_HASHINO 3 | |
44 | ||
45 | /* | |
46 | * pg layout -- how PGs are mapped onto (sets of) OSDs | |
47 | */ | |
48 | #define CEPH_PG_LAYOUT_CRUSH 0 | |
49 | #define CEPH_PG_LAYOUT_HASH 1 | |
50 | #define CEPH_PG_LAYOUT_LINEAR 2 | |
51 | #define CEPH_PG_LAYOUT_HYBRID 3 | |
52 | ||
53 | ||
54 | /* | |
55 | * placement group. | |
56 | * we encode this into one __le64. | |
57 | */ | |
58 | union ceph_pg { | |
59 | __u64 pg64; | |
60 | struct { | |
61 | __s16 preferred; /* preferred primary osd */ | |
62 | __u16 ps; /* placement seed */ | |
63 | __u32 pool; /* object pool */ | |
64 | } __attribute__ ((packed)) pg; | |
65 | } __attribute__ ((packed)); | |
66 | ||
67 | /* | |
68 | * pg_pool is a set of pgs storing a pool of objects | |
69 | * | |
70 | * pg_num -- base number of pseudorandomly placed pgs | |
71 | * | |
72 | * pgp_num -- effective number when calculating pg placement. this | |
73 | * is used for pg_num increases. new pgs result in data being "split" | |
74 | * into new pgs. for this to proceed smoothly, new pgs are intiially | |
75 | * colocated with their parents; that is, pgp_num doesn't increase | |
76 | * until the new pgs have successfully split. only _then_ are the new | |
77 | * pgs placed independently. | |
78 | * | |
79 | * lpg_num -- localized pg count (per device). replicas are randomly | |
80 | * selected. | |
81 | * | |
82 | * lpgp_num -- as above. | |
83 | */ | |
84 | #define CEPH_PG_TYPE_REP 1 | |
85 | #define CEPH_PG_TYPE_RAID4 2 | |
86 | struct ceph_pg_pool { | |
87 | __u8 type; /* CEPH_PG_TYPE_* */ | |
88 | __u8 size; /* number of osds in each pg */ | |
89 | __u8 crush_ruleset; /* crush placement rule */ | |
90 | __le32 pg_num, pgp_num; /* number of pg's */ | |
91 | __le32 lpg_num, lpgp_num; /* number of localized pg's */ | |
92 | __le32 last_change; /* most recent epoch changed */ | |
93 | __le64 snap_seq; /* seq for per-pool snapshot */ | |
94 | __le32 snap_epoch; /* epoch of last snap */ | |
95 | __le32 num_snaps; | |
96 | __le32 num_removed_snap_intervals; | |
97 | } __attribute__ ((packed)); | |
98 | ||
99 | /* | |
100 | * stable_mod func is used to control number of placement groups. | |
101 | * similar to straight-up modulo, but produces a stable mapping as b | |
102 | * increases over time. b is the number of bins, and bmask is the | |
103 | * containing power of 2 minus 1. | |
104 | * | |
105 | * b <= bmask and bmask=(2**n)-1 | |
106 | * e.g., b=12 -> bmask=15, b=123 -> bmask=127 | |
107 | */ | |
108 | static inline int ceph_stable_mod(int x, int b, int bmask) | |
109 | { | |
110 | if ((x & bmask) < b) | |
111 | return x & bmask; | |
112 | else | |
113 | return x & (bmask >> 1); | |
114 | } | |
115 | ||
116 | /* | |
117 | * object layout - how a given object should be stored. | |
118 | */ | |
119 | struct ceph_object_layout { | |
120 | __le64 ol_pgid; /* raw pg, with _full_ ps precision. */ | |
121 | __le32 ol_stripe_unit; /* for per-object parity, if any */ | |
122 | } __attribute__ ((packed)); | |
123 | ||
124 | /* | |
125 | * compound epoch+version, used by storage layer to serialize mutations | |
126 | */ | |
127 | struct ceph_eversion { | |
128 | __le32 epoch; | |
129 | __le64 version; | |
130 | } __attribute__ ((packed)); | |
131 | ||
132 | /* | |
133 | * osd map bits | |
134 | */ | |
135 | ||
136 | /* status bits */ | |
137 | #define CEPH_OSD_EXISTS 1 | |
138 | #define CEPH_OSD_UP 2 | |
139 | ||
140 | /* osd weights. fixed point value: 0x10000 == 1.0 ("in"), 0 == "out" */ | |
141 | #define CEPH_OSD_IN 0x10000 | |
142 | #define CEPH_OSD_OUT 0 | |
143 | ||
144 | ||
145 | /* | |
146 | * osd map flag bits | |
147 | */ | |
148 | #define CEPH_OSDMAP_NEARFULL (1<<0) /* sync writes (near ENOSPC) */ | |
149 | #define CEPH_OSDMAP_FULL (1<<1) /* no data writes (ENOSPC) */ | |
150 | #define CEPH_OSDMAP_PAUSERD (1<<2) /* pause all reads */ | |
151 | #define CEPH_OSDMAP_PAUSEWR (1<<3) /* pause all writes */ | |
152 | #define CEPH_OSDMAP_PAUSEREC (1<<4) /* pause recovery */ | |
153 | ||
154 | /* | |
155 | * osd ops | |
156 | */ | |
157 | #define CEPH_OSD_OP_MODE 0xf000 | |
158 | #define CEPH_OSD_OP_MODE_RD 0x1000 | |
159 | #define CEPH_OSD_OP_MODE_WR 0x2000 | |
160 | #define CEPH_OSD_OP_MODE_RMW 0x3000 | |
161 | #define CEPH_OSD_OP_MODE_SUB 0x4000 | |
162 | #define CEPH_OSD_OP_MODE_EXEC 0x8000 | |
163 | ||
164 | #define CEPH_OSD_OP_TYPE 0x0f00 | |
165 | #define CEPH_OSD_OP_TYPE_LOCK 0x0100 | |
166 | #define CEPH_OSD_OP_TYPE_DATA 0x0200 | |
167 | #define CEPH_OSD_OP_TYPE_ATTR 0x0300 | |
168 | #define CEPH_OSD_OP_TYPE_EXEC 0x0400 | |
169 | #define CEPH_OSD_OP_TYPE_PG 0x0500 | |
170 | ||
171 | enum { | |
172 | /** data **/ | |
173 | /* read */ | |
174 | CEPH_OSD_OP_READ = CEPH_OSD_OP_MODE_RD | CEPH_OSD_OP_TYPE_DATA | 1, | |
175 | CEPH_OSD_OP_STAT = CEPH_OSD_OP_MODE_RD | CEPH_OSD_OP_TYPE_DATA | 2, | |
176 | ||
177 | /* fancy read */ | |
178 | CEPH_OSD_OP_MASKTRUNC = CEPH_OSD_OP_MODE_RD | CEPH_OSD_OP_TYPE_DATA | 4, | |
179 | ||
180 | /* write */ | |
181 | CEPH_OSD_OP_WRITE = CEPH_OSD_OP_MODE_WR | CEPH_OSD_OP_TYPE_DATA | 1, | |
182 | CEPH_OSD_OP_WRITEFULL = CEPH_OSD_OP_MODE_WR | CEPH_OSD_OP_TYPE_DATA | 2, | |
183 | CEPH_OSD_OP_TRUNCATE = CEPH_OSD_OP_MODE_WR | CEPH_OSD_OP_TYPE_DATA | 3, | |
184 | CEPH_OSD_OP_ZERO = CEPH_OSD_OP_MODE_WR | CEPH_OSD_OP_TYPE_DATA | 4, | |
185 | CEPH_OSD_OP_DELETE = CEPH_OSD_OP_MODE_WR | CEPH_OSD_OP_TYPE_DATA | 5, | |
186 | ||
187 | /* fancy write */ | |
188 | CEPH_OSD_OP_APPEND = CEPH_OSD_OP_MODE_WR | CEPH_OSD_OP_TYPE_DATA | 6, | |
189 | CEPH_OSD_OP_STARTSYNC = CEPH_OSD_OP_MODE_WR | CEPH_OSD_OP_TYPE_DATA | 7, | |
190 | CEPH_OSD_OP_SETTRUNC = CEPH_OSD_OP_MODE_WR | CEPH_OSD_OP_TYPE_DATA | 8, | |
191 | CEPH_OSD_OP_TRIMTRUNC = CEPH_OSD_OP_MODE_WR | CEPH_OSD_OP_TYPE_DATA | 9, | |
192 | ||
193 | CEPH_OSD_OP_TMAPUP = CEPH_OSD_OP_MODE_RMW | CEPH_OSD_OP_TYPE_DATA | 10, | |
194 | CEPH_OSD_OP_TMAPPUT = CEPH_OSD_OP_MODE_WR | CEPH_OSD_OP_TYPE_DATA | 11, | |
195 | CEPH_OSD_OP_TMAPGET = CEPH_OSD_OP_MODE_RD | CEPH_OSD_OP_TYPE_DATA | 12, | |
196 | ||
197 | CEPH_OSD_OP_CREATE = CEPH_OSD_OP_MODE_WR | CEPH_OSD_OP_TYPE_DATA | 13, | |
198 | ||
199 | /** attrs **/ | |
200 | /* read */ | |
201 | CEPH_OSD_OP_GETXATTR = CEPH_OSD_OP_MODE_RD | CEPH_OSD_OP_TYPE_ATTR | 1, | |
202 | CEPH_OSD_OP_GETXATTRS = CEPH_OSD_OP_MODE_RD | CEPH_OSD_OP_TYPE_ATTR | 2, | |
203 | ||
204 | /* write */ | |
205 | CEPH_OSD_OP_SETXATTR = CEPH_OSD_OP_MODE_WR | CEPH_OSD_OP_TYPE_ATTR | 1, | |
206 | CEPH_OSD_OP_SETXATTRS = CEPH_OSD_OP_MODE_WR | CEPH_OSD_OP_TYPE_ATTR | 2, | |
207 | CEPH_OSD_OP_RESETXATTRS = CEPH_OSD_OP_MODE_WR|CEPH_OSD_OP_TYPE_ATTR | 3, | |
208 | CEPH_OSD_OP_RMXATTR = CEPH_OSD_OP_MODE_WR | CEPH_OSD_OP_TYPE_ATTR | 4, | |
209 | ||
210 | /** subop **/ | |
211 | CEPH_OSD_OP_PULL = CEPH_OSD_OP_MODE_SUB | 1, | |
212 | CEPH_OSD_OP_PUSH = CEPH_OSD_OP_MODE_SUB | 2, | |
213 | CEPH_OSD_OP_BALANCEREADS = CEPH_OSD_OP_MODE_SUB | 3, | |
214 | CEPH_OSD_OP_UNBALANCEREADS = CEPH_OSD_OP_MODE_SUB | 4, | |
215 | CEPH_OSD_OP_SCRUB = CEPH_OSD_OP_MODE_SUB | 5, | |
216 | ||
217 | /** lock **/ | |
218 | CEPH_OSD_OP_WRLOCK = CEPH_OSD_OP_MODE_WR | CEPH_OSD_OP_TYPE_LOCK | 1, | |
219 | CEPH_OSD_OP_WRUNLOCK = CEPH_OSD_OP_MODE_WR | CEPH_OSD_OP_TYPE_LOCK | 2, | |
220 | CEPH_OSD_OP_RDLOCK = CEPH_OSD_OP_MODE_WR | CEPH_OSD_OP_TYPE_LOCK | 3, | |
221 | CEPH_OSD_OP_RDUNLOCK = CEPH_OSD_OP_MODE_WR | CEPH_OSD_OP_TYPE_LOCK | 4, | |
222 | CEPH_OSD_OP_UPLOCK = CEPH_OSD_OP_MODE_WR | CEPH_OSD_OP_TYPE_LOCK | 5, | |
223 | CEPH_OSD_OP_DNLOCK = CEPH_OSD_OP_MODE_WR | CEPH_OSD_OP_TYPE_LOCK | 6, | |
224 | ||
225 | /** exec **/ | |
226 | CEPH_OSD_OP_CALL = CEPH_OSD_OP_MODE_RD | CEPH_OSD_OP_TYPE_EXEC | 1, | |
227 | ||
228 | /** pg **/ | |
229 | CEPH_OSD_OP_PGLS = CEPH_OSD_OP_MODE_RD | CEPH_OSD_OP_TYPE_PG | 1, | |
230 | }; | |
231 | ||
232 | static inline int ceph_osd_op_type_lock(int op) | |
233 | { | |
234 | return (op & CEPH_OSD_OP_TYPE) == CEPH_OSD_OP_TYPE_LOCK; | |
235 | } | |
236 | static inline int ceph_osd_op_type_data(int op) | |
237 | { | |
238 | return (op & CEPH_OSD_OP_TYPE) == CEPH_OSD_OP_TYPE_DATA; | |
239 | } | |
240 | static inline int ceph_osd_op_type_attr(int op) | |
241 | { | |
242 | return (op & CEPH_OSD_OP_TYPE) == CEPH_OSD_OP_TYPE_ATTR; | |
243 | } | |
244 | static inline int ceph_osd_op_type_exec(int op) | |
245 | { | |
246 | return (op & CEPH_OSD_OP_TYPE) == CEPH_OSD_OP_TYPE_EXEC; | |
247 | } | |
248 | static inline int ceph_osd_op_type_pg(int op) | |
249 | { | |
250 | return (op & CEPH_OSD_OP_TYPE) == CEPH_OSD_OP_TYPE_PG; | |
251 | } | |
252 | ||
253 | static inline int ceph_osd_op_mode_subop(int op) | |
254 | { | |
255 | return (op & CEPH_OSD_OP_MODE) == CEPH_OSD_OP_MODE_SUB; | |
256 | } | |
257 | static inline int ceph_osd_op_mode_read(int op) | |
258 | { | |
259 | return (op & CEPH_OSD_OP_MODE) == CEPH_OSD_OP_MODE_RD; | |
260 | } | |
261 | static inline int ceph_osd_op_mode_modify(int op) | |
262 | { | |
263 | return (op & CEPH_OSD_OP_MODE) == CEPH_OSD_OP_MODE_WR; | |
264 | } | |
265 | ||
266 | #define CEPH_OSD_TMAP_HDR 'h' | |
267 | #define CEPH_OSD_TMAP_SET 's' | |
268 | #define CEPH_OSD_TMAP_RM 'r' | |
269 | ||
270 | extern const char *ceph_osd_op_name(int op); | |
271 | ||
272 | ||
273 | /* | |
274 | * osd op flags | |
275 | * | |
276 | * An op may be READ, WRITE, or READ|WRITE. | |
277 | */ | |
278 | enum { | |
279 | CEPH_OSD_FLAG_ACK = 1, /* want (or is) "ack" ack */ | |
280 | CEPH_OSD_FLAG_ONNVRAM = 2, /* want (or is) "onnvram" ack */ | |
281 | CEPH_OSD_FLAG_ONDISK = 4, /* want (or is) "ondisk" ack */ | |
282 | CEPH_OSD_FLAG_RETRY = 8, /* resend attempt */ | |
283 | CEPH_OSD_FLAG_READ = 16, /* op may read */ | |
284 | CEPH_OSD_FLAG_WRITE = 32, /* op may write */ | |
285 | CEPH_OSD_FLAG_ORDERSNAP = 64, /* EOLDSNAP if snapc is out of order */ | |
286 | CEPH_OSD_FLAG_PEERSTAT = 128, /* msg includes osd_peer_stat */ | |
287 | CEPH_OSD_FLAG_BALANCE_READS = 256, | |
288 | CEPH_OSD_FLAG_PARALLELEXEC = 512, /* execute op in parallel */ | |
289 | CEPH_OSD_FLAG_PGOP = 1024, /* pg op, no object */ | |
290 | }; | |
291 | ||
292 | enum { | |
293 | CEPH_OSD_OP_FLAG_EXCL = 1, /* EXCL object create */ | |
294 | }; | |
295 | ||
296 | #define EOLDSNAPC ERESTART /* ORDERSNAP flag set; writer has old snapc*/ | |
297 | #define EBLACKLISTED ESHUTDOWN /* blacklisted */ | |
298 | ||
299 | /* | |
300 | * an individual object operation. each may be accompanied by some data | |
301 | * payload | |
302 | */ | |
303 | struct ceph_osd_op { | |
304 | __le16 op; /* CEPH_OSD_OP_* */ | |
305 | __le32 flags; /* CEPH_OSD_FLAG_* */ | |
306 | union { | |
307 | struct { | |
308 | __le64 offset, length; | |
309 | } __attribute__ ((packed)) extent; | |
310 | struct { | |
311 | __le32 name_len; | |
312 | __le32 value_len; | |
313 | } __attribute__ ((packed)) xattr; | |
314 | struct { | |
315 | __le64 truncate_size; | |
316 | __le32 truncate_seq; | |
317 | } __attribute__ ((packed)) trunc; | |
318 | struct { | |
319 | __u8 class_len; | |
320 | __u8 method_len; | |
321 | __u8 argc; | |
322 | __le32 indata_len; | |
323 | } __attribute__ ((packed)) cls; | |
324 | struct { | |
325 | __le64 cookie, count; | |
326 | } __attribute__ ((packed)) pgls; | |
327 | }; | |
328 | __le32 payload_len; | |
329 | } __attribute__ ((packed)); | |
330 | ||
331 | /* | |
332 | * osd request message header. each request may include multiple | |
333 | * ceph_osd_op object operations. | |
334 | */ | |
335 | struct ceph_osd_request_head { | |
336 | __le64 tid; /* transaction id */ | |
337 | __le32 client_inc; /* client incarnation */ | |
338 | struct ceph_object_layout layout; /* pgid */ | |
339 | __le32 osdmap_epoch; /* client's osdmap epoch */ | |
340 | ||
341 | __le32 flags; | |
342 | ||
343 | struct ceph_timespec mtime; /* for mutations only */ | |
344 | struct ceph_eversion reassert_version; /* if we are replaying op */ | |
345 | ||
346 | __le32 object_len; /* length of object name */ | |
347 | ||
348 | __le64 snapid; /* snapid to read */ | |
349 | __le64 snap_seq; /* writer's snap context */ | |
350 | __le32 num_snaps; | |
351 | ||
352 | __le16 num_ops; | |
353 | struct ceph_osd_op ops[]; /* followed by ops[], obj, ticket, snaps */ | |
354 | } __attribute__ ((packed)); | |
355 | ||
356 | struct ceph_osd_reply_head { | |
357 | __le64 tid; /* transaction id */ | |
358 | __le32 client_inc; /* client incarnation */ | |
359 | __le32 flags; | |
360 | struct ceph_object_layout layout; | |
361 | __le32 osdmap_epoch; | |
362 | struct ceph_eversion reassert_version; /* for replaying uncommitted */ | |
363 | ||
364 | __le32 result; /* result code */ | |
365 | ||
366 | __le32 object_len; /* length of object name */ | |
367 | __le32 num_ops; | |
368 | struct ceph_osd_op ops[0]; /* ops[], object */ | |
369 | } __attribute__ ((packed)); | |
370 | ||
371 | ||
372 | #endif |