2 * Copyright (c) 2004, 2007 Lukas Ertl
3 * Copyright (c) 1997, 1998, 1999
4 * Nan Yang Computer Services Limited. All rights reserved.
6 * Parts copyright (c) 1997, 1998 Cybernet Corporation, NetMAX project.
7 * Parts written by Greg Lehey.
9 * This software is distributed under the so-called ``Berkeley
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. All advertising materials mentioning features or use of this software
20 * must display the following acknowledgement:
21 * This product includes software developed by Nan Yang Computer
23 * 4. Neither the name of the Company nor the names of its contributors
24 * may be used to endorse or promote products derived from this software
25 * without specific prior written permission.
27 * This software is provided ``as is'', and any express or implied
28 * warranties, including, but not limited to, the implied warranties of
29 * merchantability and fitness for a particular purpose are disclaimed.
30 * In no event shall the company or contributors be liable for any * direct, indirect, incidental, special, exemplary, or consequential
31 * damages (including, but not limited to, procurement of substitute
32 * goods or services; loss of use, data, or profits; or business
33 * interruption) however caused and on any theory of liability, whether
34 * in contract, strict liability, or tort (including negligence or
35 * otherwise) arising in any way out of the use of this software, even if
36 * advised of the possibility of such damage.
41 #ifndef _GEOM_VINUM_VAR_H_
42 #define _GEOM_VINUM_VAR_H_
47 * Vinum drives start with this structure:
50 * |--------------------------------------|
51 * | PDP-11 memorial boot block | 0
52 * |--------------------------------------|
53 * | Disk label, maybe | 1
54 * |--------------------------------------|
55 * | Slice definition (vinum_hdr) | 8
56 * |--------------------------------------|
58 * | Configuration info, first copy | 9
60 * |--------------------------------------|
62 * | Configuration info, second copy | 9 + size of config
64 * |--------------------------------------|
67 /* Sizes and offsets of our information. */
68 #define GV_HDR_OFFSET 4096 /* Offset of vinum header. */
69 #define GV_HDR_LEN 512 /* Size of vinum header. */
70 #define GV_CFG_OFFSET 4608 /* Offset of first config copy. */
71 #define GV_CFG_LEN 65536 /* Size of config copy. */
73 /* This is where the actual data starts. */
74 #define GV_DATA_START (GV_CFG_LEN * 2 + GV_CFG_OFFSET)
75 /* #define GV_DATA_START (GV_CFG_LEN * 2 + GV_HDR_LEN) */
77 #define GV_MAXDRIVENAME 32 /* Maximum length of a device name. */
78 #define GV_MAXSDNAME 64 /* Maximum length of a subdisk name. */
79 #define GV_MAXPLEXNAME 64 /* Maximum length of a plex name. */
80 #define GV_MAXVOLNAME 64 /* Maximum length of a volume name. */
82 /* Command line flags. */
83 #define GV_FLAG_R 0x01
84 #define GV_FLAG_S 0x02
85 #define GV_FLAG_V 0x04
86 #define GV_FLAG_VV 0x08
87 #define GV_FLAG_F 0x10
91 #define GV_TYPE_PLEX 2
93 #define GV_TYPE_DRIVE 4
95 /* State changing flags. */
96 #define GV_SETSTATE_FORCE 0x1
97 #define GV_SETSTATE_CONFIG 0x2
99 /* Subdisk state bitmaps for plexes. */
100 #define GV_SD_DOWNSTATE 0x01 /* Subdisk is down. */
101 #define GV_SD_STALESTATE 0x02 /* Subdisk is stale. */
102 #define GV_SD_INITSTATE 0x04 /* Subdisk is initializing. */
103 #define GV_SD_UPSTATE 0x08 /* Subdisk is up. */
105 /* Synchronization/initialization request sizes. */
106 #define GV_MIN_SYNCSIZE 512
107 #define GV_MAX_SYNCSIZE MAXPHYS
108 #define GV_DFLT_SYNCSIZE 65536
110 /* Flags for BIOs, as they are processed within vinum. */
111 #define GV_BIO_GROW 0x01
112 #define GV_BIO_MALLOC 0x02
113 #define GV_BIO_ONHOLD 0x04
114 #define GV_BIO_SYNCREQ 0x08
115 #define GV_BIO_INIT 0x10
116 #define GV_BIO_REBUILD 0x20
117 #define GV_BIO_CHECK 0x40
118 #define GV_BIO_PARITY 0x80
119 #define GV_BIO_INTERNAL \
120 (GV_BIO_SYNCREQ | GV_BIO_INIT | GV_BIO_REBUILD | GV_BIO_CHECK | GV_BIO_GROW)
122 /* Error codes to be used within gvinum. */
123 #define GV_ERR_SETSTATE (-1) /* Error setting state. */
124 #define GV_ERR_BADSIZE (-2) /* Object has wrong size. */
125 #define GV_ERR_INVTYPE (-3) /* Invalid object type. */
126 #define GV_ERR_CREATE (-4) /* Error creating gvinum object. */
127 #define GV_ERR_ISBUSY (-5) /* Object is busy. */
128 #define GV_ERR_ISATTACHED (-6) /* Object is attached to another. */
129 #define GV_ERR_INVFLAG (-7) /* Invalid flag passed. */
130 #define GV_ERR_INVSTATE (-8) /* Invalid state. */
131 #define GV_ERR_NOTFOUND (-9) /* Object not found. */
132 #define GV_ERR_NAMETAKEN (-10) /* Object name is taken. */
133 #define GV_ERR_NOSPACE (-11) /* No space left on drive/subdisk. */
134 #define GV_ERR_BADOFFSET (-12) /* Invalid offset specified. */
135 #define GV_ERR_INVNAME (-13) /* Invalid object name. */
136 #define GV_ERR_PLEXORG (-14) /* Invalid plex organization. */
139 * hostname is 256 bytes long, but we don't need to shlep multiple copies in
140 * vinum. We use the host name just to identify this system, and 32 bytes
141 * should be ample for that purpose.
144 #define GV_HOSTNAME_LEN 32
146 char sysname[GV_HOSTNAME_LEN]; /* System name at creation time. */
147 char name[GV_MAXDRIVENAME]; /* Our name of the drive. */
148 struct timeval date_of_birth; /* The time it was created ... */
149 struct timeval last_update; /* ... and the time of last update. */
150 off_t drive_size; /* Total size incl. headers. */
153 /* The 'header' of each valid vinum drive. */
156 #define GV_OLD_MAGIC 0x494E2056494E4F00LL
157 #define GV_OLD_NOMAGIC 0x4E4F2056494E4F00LL
158 #define GV_MAGIC 0x56494E554D2D3100LL
159 #define GV_NOMAGIC 0x56494E554D2D2D00LL
161 uint64_t config_length;
162 struct gv_label label;
165 /* A single freelist entry of a drive. */
167 off_t size; /* Size of this free slot. */
168 off_t offset; /* Offset on the drive. */
169 LIST_ENTRY(gv_freelist) freelist;
173 * Since we share structures between userland and kernel, we need this helper
174 * struct instead of struct bio_queue_head and friends. Maybe I find a proper
179 TAILQ_ENTRY(gv_bioq) queue;
182 #define GV_EVENT_DRIVE_TASTED 1
183 #define GV_EVENT_DRIVE_LOST 2
184 #define GV_EVENT_THREAD_EXIT 3
185 #define GV_EVENT_CREATE_DRIVE 4
186 #define GV_EVENT_CREATE_VOLUME 5
187 #define GV_EVENT_CREATE_PLEX 6
188 #define GV_EVENT_CREATE_SD 7
189 #define GV_EVENT_SAVE_CONFIG 8
190 #define GV_EVENT_RM_VOLUME 9
191 #define GV_EVENT_RM_PLEX 10
192 #define GV_EVENT_RM_SD 11
193 #define GV_EVENT_RM_DRIVE 12
194 #define GV_EVENT_SET_SD_STATE 13
195 #define GV_EVENT_SET_DRIVE_STATE 14
196 #define GV_EVENT_SET_VOL_STATE 15
197 #define GV_EVENT_SET_PLEX_STATE 16
198 #define GV_EVENT_RESET_CONFIG 17
199 #define GV_EVENT_PARITY_REBUILD 18
200 #define GV_EVENT_PARITY_CHECK 19
201 #define GV_EVENT_START_PLEX 20
202 #define GV_EVENT_START_VOLUME 21
203 #define GV_EVENT_ATTACH_PLEX 22
204 #define GV_EVENT_ATTACH_SD 23
205 #define GV_EVENT_DETACH_PLEX 24
206 #define GV_EVENT_DETACH_SD 25
207 #define GV_EVENT_RENAME_VOL 26
208 #define GV_EVENT_RENAME_PLEX 27
209 #define GV_EVENT_RENAME_SD 28
210 #define GV_EVENT_RENAME_DRIVE 29
211 #define GV_EVENT_MOVE_SD 30
212 #define GV_EVENT_SETUP_OBJECTS 31
221 TAILQ_ENTRY(gv_event) events;
224 /* This struct contains the main vinum config. */
226 /* Linked lists of all objects in our setup. */
227 LIST_HEAD(,gv_drive) drives; /* All drives. */
228 LIST_HEAD(,gv_plex) plexes; /* All plexes. */
229 LIST_HEAD(,gv_sd) subdisks; /* All subdisks. */
230 LIST_HEAD(,gv_volume) volumes; /* All volumes. */
232 TAILQ_HEAD(,gv_event) equeue; /* Event queue. */
233 struct mtx equeue_mtx; /* Event queue lock. */
234 struct mtx bqueue_mtx; /* BIO queue lock. */
235 struct mtx config_mtx; /* Configuration lock. */
236 struct bio_queue_head *bqueue_down; /* BIO queue incoming
238 struct bio_queue_head *bqueue_up; /* BIO queue for completed
240 struct g_geom *geom; /* Pointer to our VINUM geom. */
241 struct proc *worker; /* Worker process. */
245 /* softc for a drive. */
247 char name[GV_MAXDRIVENAME]; /* The name of this drive. */
248 char device[GV_MAXDRIVENAME]; /* Associated device. */
249 int state; /* The state of this drive. */
250 #define GV_DRIVE_DOWN 0
251 #define GV_DRIVE_UP 1
253 off_t size; /* Size of this drive. */
254 off_t avail; /* Available space. */
255 int sdcount; /* Number of subdisks. */
258 #define GV_DRIVE_REFERENCED 0x01 /* The drive isn't really existing,
259 but was referenced by a subdisk
262 struct gv_hdr *hdr; /* The drive header. */
264 struct g_consumer *consumer; /* Consumer attached to this drive. */
266 int freelist_entries; /* Count of freelist entries. */
267 LIST_HEAD(,gv_freelist) freelist; /* List of freelist entries. */
268 LIST_HEAD(,gv_sd) subdisks; /* Subdisks on this drive. */
269 LIST_ENTRY(gv_drive) drive; /* Entry in the vinum config. */
271 struct gv_softc *vinumconf; /* Pointer to the vinum conf. */
274 /* softc for a subdisk. */
276 char name[GV_MAXSDNAME]; /* The name of this subdisk. */
277 off_t size; /* The size of this subdisk. */
278 off_t drive_offset; /* Offset in the underlying drive. */
279 off_t plex_offset; /* Offset in the associated plex. */
280 int state; /* The state of this subdisk. */
282 #define GV_SD_STALE 1
283 #define GV_SD_INITIALIZING 2
284 #define GV_SD_REVIVING 3
287 off_t initialized; /* Count of initialized bytes. */
289 int init_size; /* Initialization read/write size. */
290 int init_error; /* Flag error on initialization. */
293 #define GV_SD_NEWBORN 0x01 /* Subdisk is created by user. */
294 #define GV_SD_TASTED 0x02 /* Subdisk is created during taste. */
295 #define GV_SD_CANGOUP 0x04 /* Subdisk can go up immediately. */
296 #define GV_SD_GROW 0x08 /* Subdisk is added to striped plex. */
298 char drive[GV_MAXDRIVENAME]; /* Name of underlying drive. */
299 char plex[GV_MAXPLEXNAME]; /* Name of associated plex. */
301 struct gv_drive *drive_sc; /* Pointer to underlying drive. */
302 struct gv_plex *plex_sc; /* Pointer to associated plex. */
304 LIST_ENTRY(gv_sd) from_drive; /* Subdisk list of underlying drive. */
305 LIST_ENTRY(gv_sd) in_plex; /* Subdisk list of associated plex. */
306 LIST_ENTRY(gv_sd) sd; /* Entry in the vinum config. */
308 struct gv_softc *vinumconf; /* Pointer to the vinum config. */
311 /* softc for a plex. */
313 char name[GV_MAXPLEXNAME]; /* The name of the plex. */
314 off_t size; /* The size of the plex. */
315 int state; /* The plex state. */
316 #define GV_PLEX_DOWN 0
317 #define GV_PLEX_INITIALIZING 1
318 #define GV_PLEX_DEGRADED 2
319 #define GV_PLEX_GROWABLE 3
322 int org; /* The plex organisation. */
323 #define GV_PLEX_DISORG 0
324 #define GV_PLEX_CONCAT 1
325 #define GV_PLEX_STRIPED 2
326 #define GV_PLEX_RAID5 4
328 int stripesize; /* The stripe size of the plex. */
330 char volume[GV_MAXVOLNAME]; /* Name of associated volume. */
331 struct gv_volume *vol_sc; /* Pointer to associated volume. */
333 int sddetached; /* Number of detached subdisks. */
334 int sdcount; /* Number of subdisks in this plex. */
335 int sddown; /* Number of subdisks that are down. */
337 #define GV_PLEX_ADDED 0x01 /* Added to an existing volume. */
338 #define GV_PLEX_SYNCING 0x02 /* Plex is syncing from another plex. */
339 #define GV_PLEX_NEWBORN 0x20 /* The plex was just created. */
340 #define GV_PLEX_REBUILDING 0x40 /* The plex is rebuilding. */
341 #define GV_PLEX_GROWING 0x80 /* The plex is growing. */
343 off_t synced; /* Count of synced bytes. */
345 TAILQ_HEAD(,gv_raid5_packet) packets; /* RAID5 sub-requests. */
347 LIST_HEAD(,gv_sd) subdisks; /* List of attached subdisks. */
348 LIST_ENTRY(gv_plex) in_volume; /* Plex list of associated volume. */
349 LIST_ENTRY(gv_plex) plex; /* Entry in the vinum config. */
352 struct bio_queue_head *bqueue; /* BIO queue. */
353 struct bio_queue_head *wqueue; /* Waiting BIO queue. */
354 struct bio_queue_head *rqueue; /* Rebuild waiting BIO queue. */
356 char *bpad, *wpad, *rpad; /* Padding for userland. */
359 struct gv_softc *vinumconf; /* Pointer to the vinum config. */
362 /* softc for a volume. */
364 char name[GV_MAXVOLNAME]; /* The name of the volume. */
365 off_t size; /* The size of the volume. */
366 int plexcount; /* Number of plexes. */
367 int state; /* The state of the volume. */
368 #define GV_VOL_DOWN 0
372 #define GV_VOL_NEWBORN 0x08 /* The volume was just created. */
374 LIST_HEAD(,gv_plex) plexes; /* List of attached plexes. */
375 LIST_ENTRY(gv_volume) volume; /* Entry in vinum config. */
377 struct g_provider *provider; /* Provider of this volume. */
380 struct bio_queue_head *wqueue; /* BIO delayed request queue. */
382 char *wpad; /* Padding for userland. */
385 struct gv_plex *last_read_plex;
386 struct gv_softc *vinumconf; /* Pointer to the vinum config. */
389 #endif /* !_GEOM_VINUM_VAR_H */