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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 | ||
02f90c61 SW |
11 | /* |
12 | * osdmap encoding versions | |
13 | */ | |
2844a76a SW |
14 | #define CEPH_OSDMAP_INC_VERSION 5 |
15 | #define CEPH_OSDMAP_INC_VERSION_EXT 5 | |
16 | #define CEPH_OSDMAP_VERSION 5 | |
17 | #define CEPH_OSDMAP_VERSION_EXT 5 | |
02f90c61 | 18 | |
0dee3c28 SW |
19 | /* |
20 | * fs id | |
21 | */ | |
22 | struct ceph_fsid { | |
23 | unsigned char fsid[16]; | |
24 | }; | |
25 | ||
26 | static inline int ceph_fsid_compare(const struct ceph_fsid *a, | |
27 | const struct ceph_fsid *b) | |
28 | { | |
29 | return memcmp(a, b, sizeof(*a)); | |
30 | } | |
31 | ||
32 | /* | |
33 | * ino, object, etc. | |
34 | */ | |
35 | typedef __le64 ceph_snapid_t; | |
36 | #define CEPH_SNAPDIR ((__u64)(-1)) /* reserved for hidden .snap dir */ | |
37 | #define CEPH_NOSNAP ((__u64)(-2)) /* "head", "live" revision */ | |
38 | #define CEPH_MAXSNAP ((__u64)(-3)) /* largest valid snapid */ | |
39 | ||
40 | struct ceph_timespec { | |
41 | __le32 tv_sec; | |
42 | __le32 tv_nsec; | |
43 | } __attribute__ ((packed)); | |
44 | ||
45 | ||
46 | /* | |
47 | * object layout - how objects are mapped into PGs | |
48 | */ | |
49 | #define CEPH_OBJECT_LAYOUT_HASH 1 | |
50 | #define CEPH_OBJECT_LAYOUT_LINEAR 2 | |
51 | #define CEPH_OBJECT_LAYOUT_HASHINO 3 | |
52 | ||
53 | /* | |
54 | * pg layout -- how PGs are mapped onto (sets of) OSDs | |
55 | */ | |
56 | #define CEPH_PG_LAYOUT_CRUSH 0 | |
57 | #define CEPH_PG_LAYOUT_HASH 1 | |
58 | #define CEPH_PG_LAYOUT_LINEAR 2 | |
59 | #define CEPH_PG_LAYOUT_HYBRID 3 | |
60 | ||
61 | ||
62 | /* | |
63 | * placement group. | |
64 | * we encode this into one __le64. | |
65 | */ | |
51042122 SW |
66 | struct ceph_pg { |
67 | __le16 preferred; /* preferred primary osd */ | |
68 | __le16 ps; /* placement seed */ | |
69 | __le32 pool; /* object pool */ | |
0dee3c28 SW |
70 | } __attribute__ ((packed)); |
71 | ||
72 | /* | |
73 | * pg_pool is a set of pgs storing a pool of objects | |
74 | * | |
75 | * pg_num -- base number of pseudorandomly placed pgs | |
76 | * | |
77 | * pgp_num -- effective number when calculating pg placement. this | |
78 | * is used for pg_num increases. new pgs result in data being "split" | |
79 | * into new pgs. for this to proceed smoothly, new pgs are intiially | |
80 | * colocated with their parents; that is, pgp_num doesn't increase | |
81 | * until the new pgs have successfully split. only _then_ are the new | |
82 | * pgs placed independently. | |
83 | * | |
84 | * lpg_num -- localized pg count (per device). replicas are randomly | |
85 | * selected. | |
86 | * | |
87 | * lpgp_num -- as above. | |
88 | */ | |
89 | #define CEPH_PG_TYPE_REP 1 | |
90 | #define CEPH_PG_TYPE_RAID4 2 | |
02f90c61 | 91 | #define CEPH_PG_POOL_VERSION 2 |
0dee3c28 SW |
92 | struct ceph_pg_pool { |
93 | __u8 type; /* CEPH_PG_TYPE_* */ | |
94 | __u8 size; /* number of osds in each pg */ | |
95 | __u8 crush_ruleset; /* crush placement rule */ | |
1654dd0c | 96 | __u8 object_hash; /* hash mapping object name to ps */ |
0dee3c28 SW |
97 | __le32 pg_num, pgp_num; /* number of pg's */ |
98 | __le32 lpg_num, lpgp_num; /* number of localized pg's */ | |
99 | __le32 last_change; /* most recent epoch changed */ | |
100 | __le64 snap_seq; /* seq for per-pool snapshot */ | |
101 | __le32 snap_epoch; /* epoch of last snap */ | |
102 | __le32 num_snaps; | |
103 | __le32 num_removed_snap_intervals; | |
02f90c61 | 104 | __le64 uid; |
0dee3c28 SW |
105 | } __attribute__ ((packed)); |
106 | ||
107 | /* | |
108 | * stable_mod func is used to control number of placement groups. | |
109 | * similar to straight-up modulo, but produces a stable mapping as b | |
110 | * increases over time. b is the number of bins, and bmask is the | |
111 | * containing power of 2 minus 1. | |
112 | * | |
113 | * b <= bmask and bmask=(2**n)-1 | |
114 | * e.g., b=12 -> bmask=15, b=123 -> bmask=127 | |
115 | */ | |
116 | static inline int ceph_stable_mod(int x, int b, int bmask) | |
117 | { | |
118 | if ((x & bmask) < b) | |
119 | return x & bmask; | |
120 | else | |
121 | return x & (bmask >> 1); | |
122 | } | |
123 | ||
124 | /* | |
125 | * object layout - how a given object should be stored. | |
126 | */ | |
127 | struct ceph_object_layout { | |
51042122 | 128 | struct ceph_pg ol_pgid; /* raw pg, with _full_ ps precision. */ |
0dee3c28 SW |
129 | __le32 ol_stripe_unit; /* for per-object parity, if any */ |
130 | } __attribute__ ((packed)); | |
131 | ||
132 | /* | |
133 | * compound epoch+version, used by storage layer to serialize mutations | |
134 | */ | |
135 | struct ceph_eversion { | |
136 | __le32 epoch; | |
137 | __le64 version; | |
138 | } __attribute__ ((packed)); | |
139 | ||
140 | /* | |
141 | * osd map bits | |
142 | */ | |
143 | ||
144 | /* status bits */ | |
145 | #define CEPH_OSD_EXISTS 1 | |
146 | #define CEPH_OSD_UP 2 | |
147 | ||
148 | /* osd weights. fixed point value: 0x10000 == 1.0 ("in"), 0 == "out" */ | |
149 | #define CEPH_OSD_IN 0x10000 | |
150 | #define CEPH_OSD_OUT 0 | |
151 | ||
152 | ||
153 | /* | |
154 | * osd map flag bits | |
155 | */ | |
156 | #define CEPH_OSDMAP_NEARFULL (1<<0) /* sync writes (near ENOSPC) */ | |
157 | #define CEPH_OSDMAP_FULL (1<<1) /* no data writes (ENOSPC) */ | |
158 | #define CEPH_OSDMAP_PAUSERD (1<<2) /* pause all reads */ | |
159 | #define CEPH_OSDMAP_PAUSEWR (1<<3) /* pause all writes */ | |
160 | #define CEPH_OSDMAP_PAUSEREC (1<<4) /* pause recovery */ | |
161 | ||
162 | /* | |
163 | * osd ops | |
164 | */ | |
165 | #define CEPH_OSD_OP_MODE 0xf000 | |
166 | #define CEPH_OSD_OP_MODE_RD 0x1000 | |
167 | #define CEPH_OSD_OP_MODE_WR 0x2000 | |
168 | #define CEPH_OSD_OP_MODE_RMW 0x3000 | |
169 | #define CEPH_OSD_OP_MODE_SUB 0x4000 | |
0dee3c28 SW |
170 | |
171 | #define CEPH_OSD_OP_TYPE 0x0f00 | |
172 | #define CEPH_OSD_OP_TYPE_LOCK 0x0100 | |
173 | #define CEPH_OSD_OP_TYPE_DATA 0x0200 | |
174 | #define CEPH_OSD_OP_TYPE_ATTR 0x0300 | |
175 | #define CEPH_OSD_OP_TYPE_EXEC 0x0400 | |
176 | #define CEPH_OSD_OP_TYPE_PG 0x0500 | |
177 | ||
178 | enum { | |
179 | /** data **/ | |
180 | /* read */ | |
181 | CEPH_OSD_OP_READ = CEPH_OSD_OP_MODE_RD | CEPH_OSD_OP_TYPE_DATA | 1, | |
182 | CEPH_OSD_OP_STAT = CEPH_OSD_OP_MODE_RD | CEPH_OSD_OP_TYPE_DATA | 2, | |
183 | ||
184 | /* fancy read */ | |
185 | CEPH_OSD_OP_MASKTRUNC = CEPH_OSD_OP_MODE_RD | CEPH_OSD_OP_TYPE_DATA | 4, | |
186 | ||
187 | /* write */ | |
188 | CEPH_OSD_OP_WRITE = CEPH_OSD_OP_MODE_WR | CEPH_OSD_OP_TYPE_DATA | 1, | |
189 | CEPH_OSD_OP_WRITEFULL = CEPH_OSD_OP_MODE_WR | CEPH_OSD_OP_TYPE_DATA | 2, | |
190 | CEPH_OSD_OP_TRUNCATE = CEPH_OSD_OP_MODE_WR | CEPH_OSD_OP_TYPE_DATA | 3, | |
191 | CEPH_OSD_OP_ZERO = CEPH_OSD_OP_MODE_WR | CEPH_OSD_OP_TYPE_DATA | 4, | |
192 | CEPH_OSD_OP_DELETE = CEPH_OSD_OP_MODE_WR | CEPH_OSD_OP_TYPE_DATA | 5, | |
193 | ||
194 | /* fancy write */ | |
195 | CEPH_OSD_OP_APPEND = CEPH_OSD_OP_MODE_WR | CEPH_OSD_OP_TYPE_DATA | 6, | |
196 | CEPH_OSD_OP_STARTSYNC = CEPH_OSD_OP_MODE_WR | CEPH_OSD_OP_TYPE_DATA | 7, | |
197 | CEPH_OSD_OP_SETTRUNC = CEPH_OSD_OP_MODE_WR | CEPH_OSD_OP_TYPE_DATA | 8, | |
198 | CEPH_OSD_OP_TRIMTRUNC = CEPH_OSD_OP_MODE_WR | CEPH_OSD_OP_TYPE_DATA | 9, | |
199 | ||
200 | CEPH_OSD_OP_TMAPUP = CEPH_OSD_OP_MODE_RMW | CEPH_OSD_OP_TYPE_DATA | 10, | |
201 | CEPH_OSD_OP_TMAPPUT = CEPH_OSD_OP_MODE_WR | CEPH_OSD_OP_TYPE_DATA | 11, | |
202 | CEPH_OSD_OP_TMAPGET = CEPH_OSD_OP_MODE_RD | CEPH_OSD_OP_TYPE_DATA | 12, | |
203 | ||
204 | CEPH_OSD_OP_CREATE = CEPH_OSD_OP_MODE_WR | CEPH_OSD_OP_TYPE_DATA | 13, | |
205 | ||
206 | /** attrs **/ | |
207 | /* read */ | |
208 | CEPH_OSD_OP_GETXATTR = CEPH_OSD_OP_MODE_RD | CEPH_OSD_OP_TYPE_ATTR | 1, | |
209 | CEPH_OSD_OP_GETXATTRS = CEPH_OSD_OP_MODE_RD | CEPH_OSD_OP_TYPE_ATTR | 2, | |
210 | ||
211 | /* write */ | |
212 | CEPH_OSD_OP_SETXATTR = CEPH_OSD_OP_MODE_WR | CEPH_OSD_OP_TYPE_ATTR | 1, | |
213 | CEPH_OSD_OP_SETXATTRS = CEPH_OSD_OP_MODE_WR | CEPH_OSD_OP_TYPE_ATTR | 2, | |
214 | CEPH_OSD_OP_RESETXATTRS = CEPH_OSD_OP_MODE_WR|CEPH_OSD_OP_TYPE_ATTR | 3, | |
215 | CEPH_OSD_OP_RMXATTR = CEPH_OSD_OP_MODE_WR | CEPH_OSD_OP_TYPE_ATTR | 4, | |
216 | ||
217 | /** subop **/ | |
218 | CEPH_OSD_OP_PULL = CEPH_OSD_OP_MODE_SUB | 1, | |
219 | CEPH_OSD_OP_PUSH = CEPH_OSD_OP_MODE_SUB | 2, | |
220 | CEPH_OSD_OP_BALANCEREADS = CEPH_OSD_OP_MODE_SUB | 3, | |
221 | CEPH_OSD_OP_UNBALANCEREADS = CEPH_OSD_OP_MODE_SUB | 4, | |
222 | CEPH_OSD_OP_SCRUB = CEPH_OSD_OP_MODE_SUB | 5, | |
223 | ||
224 | /** lock **/ | |
225 | CEPH_OSD_OP_WRLOCK = CEPH_OSD_OP_MODE_WR | CEPH_OSD_OP_TYPE_LOCK | 1, | |
226 | CEPH_OSD_OP_WRUNLOCK = CEPH_OSD_OP_MODE_WR | CEPH_OSD_OP_TYPE_LOCK | 2, | |
227 | CEPH_OSD_OP_RDLOCK = CEPH_OSD_OP_MODE_WR | CEPH_OSD_OP_TYPE_LOCK | 3, | |
228 | CEPH_OSD_OP_RDUNLOCK = CEPH_OSD_OP_MODE_WR | CEPH_OSD_OP_TYPE_LOCK | 4, | |
229 | CEPH_OSD_OP_UPLOCK = CEPH_OSD_OP_MODE_WR | CEPH_OSD_OP_TYPE_LOCK | 5, | |
230 | CEPH_OSD_OP_DNLOCK = CEPH_OSD_OP_MODE_WR | CEPH_OSD_OP_TYPE_LOCK | 6, | |
231 | ||
232 | /** exec **/ | |
233 | CEPH_OSD_OP_CALL = CEPH_OSD_OP_MODE_RD | CEPH_OSD_OP_TYPE_EXEC | 1, | |
234 | ||
235 | /** pg **/ | |
236 | CEPH_OSD_OP_PGLS = CEPH_OSD_OP_MODE_RD | CEPH_OSD_OP_TYPE_PG | 1, | |
237 | }; | |
238 | ||
239 | static inline int ceph_osd_op_type_lock(int op) | |
240 | { | |
241 | return (op & CEPH_OSD_OP_TYPE) == CEPH_OSD_OP_TYPE_LOCK; | |
242 | } | |
243 | static inline int ceph_osd_op_type_data(int op) | |
244 | { | |
245 | return (op & CEPH_OSD_OP_TYPE) == CEPH_OSD_OP_TYPE_DATA; | |
246 | } | |
247 | static inline int ceph_osd_op_type_attr(int op) | |
248 | { | |
249 | return (op & CEPH_OSD_OP_TYPE) == CEPH_OSD_OP_TYPE_ATTR; | |
250 | } | |
251 | static inline int ceph_osd_op_type_exec(int op) | |
252 | { | |
253 | return (op & CEPH_OSD_OP_TYPE) == CEPH_OSD_OP_TYPE_EXEC; | |
254 | } | |
255 | static inline int ceph_osd_op_type_pg(int op) | |
256 | { | |
257 | return (op & CEPH_OSD_OP_TYPE) == CEPH_OSD_OP_TYPE_PG; | |
258 | } | |
259 | ||
260 | static inline int ceph_osd_op_mode_subop(int op) | |
261 | { | |
262 | return (op & CEPH_OSD_OP_MODE) == CEPH_OSD_OP_MODE_SUB; | |
263 | } | |
264 | static inline int ceph_osd_op_mode_read(int op) | |
265 | { | |
266 | return (op & CEPH_OSD_OP_MODE) == CEPH_OSD_OP_MODE_RD; | |
267 | } | |
268 | static inline int ceph_osd_op_mode_modify(int op) | |
269 | { | |
270 | return (op & CEPH_OSD_OP_MODE) == CEPH_OSD_OP_MODE_WR; | |
271 | } | |
272 | ||
273 | #define CEPH_OSD_TMAP_HDR 'h' | |
274 | #define CEPH_OSD_TMAP_SET 's' | |
275 | #define CEPH_OSD_TMAP_RM 'r' | |
276 | ||
277 | extern const char *ceph_osd_op_name(int op); | |
278 | ||
279 | ||
280 | /* | |
281 | * osd op flags | |
282 | * | |
283 | * An op may be READ, WRITE, or READ|WRITE. | |
284 | */ | |
285 | enum { | |
286 | CEPH_OSD_FLAG_ACK = 1, /* want (or is) "ack" ack */ | |
287 | CEPH_OSD_FLAG_ONNVRAM = 2, /* want (or is) "onnvram" ack */ | |
288 | CEPH_OSD_FLAG_ONDISK = 4, /* want (or is) "ondisk" ack */ | |
289 | CEPH_OSD_FLAG_RETRY = 8, /* resend attempt */ | |
290 | CEPH_OSD_FLAG_READ = 16, /* op may read */ | |
291 | CEPH_OSD_FLAG_WRITE = 32, /* op may write */ | |
292 | CEPH_OSD_FLAG_ORDERSNAP = 64, /* EOLDSNAP if snapc is out of order */ | |
293 | CEPH_OSD_FLAG_PEERSTAT = 128, /* msg includes osd_peer_stat */ | |
294 | CEPH_OSD_FLAG_BALANCE_READS = 256, | |
295 | CEPH_OSD_FLAG_PARALLELEXEC = 512, /* execute op in parallel */ | |
296 | CEPH_OSD_FLAG_PGOP = 1024, /* pg op, no object */ | |
4e7a5dcd | 297 | CEPH_OSD_FLAG_EXEC = 2048, /* op may exec */ |
0dee3c28 SW |
298 | }; |
299 | ||
300 | enum { | |
301 | CEPH_OSD_OP_FLAG_EXCL = 1, /* EXCL object create */ | |
302 | }; | |
303 | ||
304 | #define EOLDSNAPC ERESTART /* ORDERSNAP flag set; writer has old snapc*/ | |
305 | #define EBLACKLISTED ESHUTDOWN /* blacklisted */ | |
306 | ||
307 | /* | |
308 | * an individual object operation. each may be accompanied by some data | |
309 | * payload | |
310 | */ | |
311 | struct ceph_osd_op { | |
312 | __le16 op; /* CEPH_OSD_OP_* */ | |
313 | __le32 flags; /* CEPH_OSD_FLAG_* */ | |
314 | union { | |
315 | struct { | |
316 | __le64 offset, length; | |
0c948992 YS |
317 | __le64 truncate_size; |
318 | __le32 truncate_seq; | |
0dee3c28 SW |
319 | } __attribute__ ((packed)) extent; |
320 | struct { | |
321 | __le32 name_len; | |
322 | __le32 value_len; | |
323 | } __attribute__ ((packed)) xattr; | |
0dee3c28 SW |
324 | struct { |
325 | __u8 class_len; | |
326 | __u8 method_len; | |
327 | __u8 argc; | |
328 | __le32 indata_len; | |
329 | } __attribute__ ((packed)) cls; | |
330 | struct { | |
331 | __le64 cookie, count; | |
332 | } __attribute__ ((packed)) pgls; | |
333 | }; | |
334 | __le32 payload_len; | |
335 | } __attribute__ ((packed)); | |
336 | ||
337 | /* | |
338 | * osd request message header. each request may include multiple | |
339 | * ceph_osd_op object operations. | |
340 | */ | |
341 | struct ceph_osd_request_head { | |
0dee3c28 SW |
342 | __le32 client_inc; /* client incarnation */ |
343 | struct ceph_object_layout layout; /* pgid */ | |
344 | __le32 osdmap_epoch; /* client's osdmap epoch */ | |
345 | ||
346 | __le32 flags; | |
347 | ||
348 | struct ceph_timespec mtime; /* for mutations only */ | |
349 | struct ceph_eversion reassert_version; /* if we are replaying op */ | |
350 | ||
351 | __le32 object_len; /* length of object name */ | |
352 | ||
353 | __le64 snapid; /* snapid to read */ | |
354 | __le64 snap_seq; /* writer's snap context */ | |
355 | __le32 num_snaps; | |
356 | ||
357 | __le16 num_ops; | |
358 | struct ceph_osd_op ops[]; /* followed by ops[], obj, ticket, snaps */ | |
359 | } __attribute__ ((packed)); | |
360 | ||
361 | struct ceph_osd_reply_head { | |
0dee3c28 SW |
362 | __le32 client_inc; /* client incarnation */ |
363 | __le32 flags; | |
364 | struct ceph_object_layout layout; | |
365 | __le32 osdmap_epoch; | |
366 | struct ceph_eversion reassert_version; /* for replaying uncommitted */ | |
367 | ||
368 | __le32 result; /* result code */ | |
369 | ||
370 | __le32 object_len; /* length of object name */ | |
371 | __le32 num_ops; | |
372 | struct ceph_osd_op ops[0]; /* ops[], object */ | |
373 | } __attribute__ ((packed)); | |
374 | ||
375 | ||
376 | #endif |