1 7a4ee46d 2003-11-23 devnull typedef struct Config Config;
2 7a4ee46d 2003-11-23 devnull typedef struct AMap AMap;
3 7a4ee46d 2003-11-23 devnull typedef struct AMapN AMapN;
4 7a4ee46d 2003-11-23 devnull typedef struct Arena Arena;
5 7a4ee46d 2003-11-23 devnull typedef struct ArenaHead ArenaHead;
6 7a4ee46d 2003-11-23 devnull typedef struct ArenaPart ArenaPart;
7 7a4ee46d 2003-11-23 devnull typedef struct CIBlock CIBlock;
8 7a4ee46d 2003-11-23 devnull typedef struct Clump Clump;
9 7a4ee46d 2003-11-23 devnull typedef struct ClumpInfo ClumpInfo;
10 7a4ee46d 2003-11-23 devnull typedef struct IAddr IAddr;
11 7a4ee46d 2003-11-23 devnull typedef struct IBucket IBucket;
12 7a4ee46d 2003-11-23 devnull typedef struct ICache ICache;
13 7a4ee46d 2003-11-23 devnull typedef struct IEStream IEStream;
14 7a4ee46d 2003-11-23 devnull typedef struct IEntry IEntry;
15 7a4ee46d 2003-11-23 devnull typedef struct IFile IFile;
16 7a4ee46d 2003-11-23 devnull typedef struct ISect ISect;
17 7a4ee46d 2003-11-23 devnull typedef struct Index Index;
18 7a4ee46d 2003-11-23 devnull typedef struct Lump Lump;
19 7a4ee46d 2003-11-23 devnull typedef struct DBlock DBlock;
20 7a4ee46d 2003-11-23 devnull typedef struct Part Part;
21 7a4ee46d 2003-11-23 devnull typedef struct Stats Stats;
22 7a4ee46d 2003-11-23 devnull typedef struct ZBlock ZBlock;
24 7a4ee46d 2003-11-23 devnull #define TWID32 ((u32int)~(u32int)0)
25 7a4ee46d 2003-11-23 devnull #define TWID64 ((u64int)~(u64int)0)
26 7a4ee46d 2003-11-23 devnull #define TWID8 ((u8int)~(u8int)0)
30 7a4ee46d 2003-11-23 devnull ABlockLog = 9, /* log2(512), the quantum for reading arenas */
31 7a4ee46d 2003-11-23 devnull ANameSize = 64,
32 7a4ee46d 2003-11-23 devnull MaxDiskBlock = 64*1024, /* max. allowed size for a disk block */
33 7a4ee46d 2003-11-23 devnull MaxIoSize = 64*1024, /* max. allowed size for a disk io operation */
34 7a4ee46d 2003-11-23 devnull PartBlank = 256*1024, /* untouched section at beginning of partition */
35 7a4ee46d 2003-11-23 devnull HeadSize = 512, /* size of a header after PartBlank */
36 7a4ee46d 2003-11-23 devnull MinArenaSize = 1*1024*1024, /* smallest reasonable arena size */
37 7a4ee46d 2003-11-23 devnull IndexBase = 1024*1024, /* initial address to use in an index */
38 7a4ee46d 2003-11-23 devnull MaxIo = 64*1024, /* max size of a single read or write operation */
39 7a4ee46d 2003-11-23 devnull ICacheBits = 16, /* default bits for indexing icache */
40 7a4ee46d 2003-11-23 devnull ICacheDepth = 4, /* default depth of an icache hash chain */
41 7a4ee46d 2003-11-23 devnull MaxAMap = 2*1024, /* max. allowed arenas in an address mapping; must be < 32*1024 */
44 7a4ee46d 2003-11-23 devnull * return codes from syncarena
46 7a4ee46d 2003-11-23 devnull SyncDataErr = 1 << 0, /* problem reading the clump data */
47 7a4ee46d 2003-11-23 devnull SyncCIErr = 1 << 1, /* found erroneous clump directory entries */
48 7a4ee46d 2003-11-23 devnull SyncCIZero = 1 << 2, /* found unwritten clump directory entries */
49 7a4ee46d 2003-11-23 devnull SyncFixErr = 1 << 3, /* error writing fixed data */
50 7a4ee46d 2003-11-23 devnull SyncHeader = 1 << 4, /* altered header fields */
53 7a4ee46d 2003-11-23 devnull * error severity
55 7a4ee46d 2003-11-23 devnull EOk = 0, /* error expected in normal operation */
56 7a4ee46d 2003-11-23 devnull EStrange, /* strange error that should be logged */
57 7a4ee46d 2003-11-23 devnull ECorrupt, /* corrupted data found in arenas */
58 7a4ee46d 2003-11-23 devnull EICorrupt, /* corrupted data found in index */
59 7a4ee46d 2003-11-23 devnull EAdmin, /* should be brought to administrators' attention */
60 7a4ee46d 2003-11-23 devnull ECrash, /* really bad internal error */
61 7a4ee46d 2003-11-23 devnull EBug, /* a limitation which should be fixed */
62 7a4ee46d 2003-11-23 devnull EInconsist, /* inconsistencies between index and arena */
66 7a4ee46d 2003-11-23 devnull * internal disk formats for the venti archival storage system
69 7a4ee46d 2003-11-23 devnull * magic numbers on disk
71 7a4ee46d 2003-11-23 devnull ClumpMagic = 0xd15cb10c, /* clump header */
72 7a4ee46d 2003-11-23 devnull ClumpFreeMagic = 0, /* free clump; terminates active clump log */
74 7a4ee46d 2003-11-23 devnull ArenaPartMagic = 0xa9e4a5e7, /* arena partition header */
75 7a4ee46d 2003-11-23 devnull ArenaMagic = 0xf2a14ead, /* arena trailer */
76 7a4ee46d 2003-11-23 devnull ArenaHeadMagic = 0xd15c4ead, /* arena header */
78 7a4ee46d 2003-11-23 devnull ISectMagic = 0xd15c5ec7, /* index header */
80 7a4ee46d 2003-11-23 devnull ArenaPartVersion = 3,
81 7a4ee46d 2003-11-23 devnull ArenaVersion = 4,
82 9ffbb5ad 2004-03-12 devnull IndexVersion1 = 1,
83 9ffbb5ad 2004-03-12 devnull IndexVersion2 = 2,
84 7a4ee46d 2003-11-23 devnull ISectVersion = 1,
87 7a4ee46d 2003-11-23 devnull * encodings of clumps on disk
89 7a4ee46d 2003-11-23 devnull ClumpEErr = 0, /* can't happen */
90 7a4ee46d 2003-11-23 devnull ClumpENone, /* plain */
91 7a4ee46d 2003-11-23 devnull ClumpECompress, /* compressed */
92 7a4ee46d 2003-11-23 devnull ClumpEMax,
95 7a4ee46d 2003-11-23 devnull * marker for corrupted data on disk
97 7a4ee46d 2003-11-23 devnull VtTypeCorrupt = VtMaxType,
100 7a4ee46d 2003-11-23 devnull * sizes in bytes on disk
102 7a4ee46d 2003-11-23 devnull U8Size = 1,
103 7a4ee46d 2003-11-23 devnull U16Size = 2,
104 7a4ee46d 2003-11-23 devnull U32Size = 4,
105 7a4ee46d 2003-11-23 devnull U64Size = 8,
107 7a4ee46d 2003-11-23 devnull ArenaPartSize = 4 * U32Size,
108 7a4ee46d 2003-11-23 devnull ArenaSize = 2 * U64Size + 6 * U32Size + ANameSize + U8Size,
109 7a4ee46d 2003-11-23 devnull ArenaHeadSize = U64Size + 3 * U32Size + ANameSize,
110 7a4ee46d 2003-11-23 devnull ISectSize = 7 * U32Size + 2 * ANameSize,
111 7a4ee46d 2003-11-23 devnull ClumpInfoSize = U8Size + 2 * U16Size + VtScoreSize,
112 7a4ee46d 2003-11-23 devnull ClumpSize = ClumpInfoSize + U8Size + 3 * U32Size,
113 7a4ee46d 2003-11-23 devnull IBucketSize = U32Size + U16Size,
114 7a4ee46d 2003-11-23 devnull IEntrySize = U64Size + U32Size + 2*U16Size + 2*U8Size + VtScoreSize,
115 7a4ee46d 2003-11-23 devnull IEntryTypeOff = VtScoreSize + U64Size + U32Size + 2 * U16Size,
117 7a4ee46d 2003-11-23 devnull MaxClumpBlocks = (VtMaxLumpSize + ClumpSize + (1 << ABlockLog) - 1) >> ABlockLog,
120 9ffbb5ad 2004-03-12 devnull * dirty flags - order controls disk write order
122 24998851 2004-03-11 devnull DirtyArena = 1,
123 9ffbb5ad 2004-03-12 devnull DirtyIndexSplit,
124 24998851 2004-03-11 devnull DirtyIndex,
125 9ffbb5ad 2004-03-12 devnull DirtyIndexBitmap,
126 24998851 2004-03-11 devnull DirtyArenaCib,
127 333c1dcc 2004-03-13 devnull DirtyArenaTrailer,
128 9ffbb5ad 2004-03-12 devnull DirtyMax,
130 7a4ee46d 2003-11-23 devnull VentiZZZZZZZZ
134 7a4ee46d 2003-11-23 devnull * results of parsing and initializing a config file
136 7a4ee46d 2003-11-23 devnull struct Config
138 7a4ee46d 2003-11-23 devnull char *index; /* name of the index to initialize */
139 7a4ee46d 2003-11-23 devnull int naparts; /* arena partitions initialized */
140 7a4ee46d 2003-11-23 devnull ArenaPart **aparts;
141 7a4ee46d 2003-11-23 devnull int nsects; /* index sections initialized */
142 7a4ee46d 2003-11-23 devnull ISect **sects;
146 7a4ee46d 2003-11-23 devnull * a Part is the low level interface to files or disks.
147 7a4ee46d 2003-11-23 devnull * there are two main types of partitions
148 7a4ee46d 2003-11-23 devnull * arena paritions, which some number of arenas, each in a sub-partition.
149 7a4ee46d 2003-11-23 devnull * index partition, which only have one subpartition.
151 7a4ee46d 2003-11-23 devnull struct Part
153 7a4ee46d 2003-11-23 devnull int fd; /* rock for accessing the disk */
154 7a4ee46d 2003-11-23 devnull u64int size; /* size of the partiton */
155 7a4ee46d 2003-11-23 devnull u32int blocksize; /* block size for reads and writes */
156 7a4ee46d 2003-11-23 devnull char *name;
157 24998851 2004-03-11 devnull Channel *writechan; /* chan[dcache.nblock](DBlock*) */
161 7a4ee46d 2003-11-23 devnull * a cached block from the partition
162 7a4ee46d 2003-11-23 devnull * yuck -- most of this is internal structure for the cache
163 7a4ee46d 2003-11-23 devnull * all other routines should only use data
165 7a4ee46d 2003-11-23 devnull struct DBlock
167 7a4ee46d 2003-11-23 devnull u8int *data;
169 7a4ee46d 2003-11-23 devnull Part *part; /* partition in which cached */
170 7a4ee46d 2003-11-23 devnull u64int addr; /* base address on the partition */
171 7a4ee46d 2003-11-23 devnull u16int size; /* amount of data available, not amount allocated; should go away */
172 24998851 2004-03-11 devnull u32int dirty;
173 24998851 2004-03-11 devnull u32int dirtying;
174 7a4ee46d 2003-11-23 devnull DBlock *next; /* doubly linked hash chains */
175 7a4ee46d 2003-11-23 devnull DBlock *prev;
176 7a4ee46d 2003-11-23 devnull u32int heap; /* index in heap table */
177 7a4ee46d 2003-11-23 devnull u32int used; /* last reference times */
178 7a4ee46d 2003-11-23 devnull u32int used2;
179 7a4ee46d 2003-11-23 devnull u32int ref; /* reference count */
180 7a4ee46d 2003-11-23 devnull QLock lock; /* for access to data only */
181 24998851 2004-03-11 devnull Channel writedonechan;
182 24998851 2004-03-11 devnull void* chanbuf[1]; /* buffer for the chan! */
186 7a4ee46d 2003-11-23 devnull * a cached block from the partition
187 7a4ee46d 2003-11-23 devnull * yuck -- most of this is internal structure for the cache
188 7a4ee46d 2003-11-23 devnull * all other routines should only use data
189 7a4ee46d 2003-11-23 devnull * double yuck -- this is mostly the same as a DBlock
191 7a4ee46d 2003-11-23 devnull struct Lump
193 7a4ee46d 2003-11-23 devnull Packet *data;
195 7a4ee46d 2003-11-23 devnull Part *part; /* partition in which cached */
196 7a4ee46d 2003-11-23 devnull u8int score[VtScoreSize]; /* score of packet */
197 7a4ee46d 2003-11-23 devnull u8int type; /* type of packet */
198 7a4ee46d 2003-11-23 devnull u16int size; /* amount of data allocated to hold packet */
199 7a4ee46d 2003-11-23 devnull Lump *next; /* doubly linked hash chains */
200 7a4ee46d 2003-11-23 devnull Lump *prev;
201 7a4ee46d 2003-11-23 devnull u32int heap; /* index in heap table */
202 7a4ee46d 2003-11-23 devnull u32int used; /* last reference times */
203 7a4ee46d 2003-11-23 devnull u32int used2;
204 7a4ee46d 2003-11-23 devnull u32int ref; /* reference count */
205 7a4ee46d 2003-11-23 devnull QLock lock; /* for access to data only */
209 7a4ee46d 2003-11-23 devnull * mapping between names and address ranges
211 7a4ee46d 2003-11-23 devnull struct AMap
213 7a4ee46d 2003-11-23 devnull u64int start;
214 7a4ee46d 2003-11-23 devnull u64int stop;
215 7a4ee46d 2003-11-23 devnull char name[ANameSize];
219 7a4ee46d 2003-11-23 devnull * an AMap along with a length
221 7a4ee46d 2003-11-23 devnull struct AMapN
224 7a4ee46d 2003-11-23 devnull AMap *map;
228 7a4ee46d 2003-11-23 devnull * an ArenaPart is a partition made up of Arenas
229 7a4ee46d 2003-11-23 devnull * it exists because most os's don't support many partitions,
230 7a4ee46d 2003-11-23 devnull * and we want to have many different Arenas
232 7a4ee46d 2003-11-23 devnull struct ArenaPart
234 7a4ee46d 2003-11-23 devnull Part *part;
235 7a4ee46d 2003-11-23 devnull u64int size; /* size of underlying partition, rounded down to blocks */
236 7a4ee46d 2003-11-23 devnull Arena **arenas;
237 7a4ee46d 2003-11-23 devnull u32int tabbase; /* base address of arena table on disk */
238 7a4ee46d 2003-11-23 devnull u32int tabsize; /* max. bytes in arena table */
241 7a4ee46d 2003-11-23 devnull * fields stored on disk
243 7a4ee46d 2003-11-23 devnull u32int version;
244 7a4ee46d 2003-11-23 devnull u32int blocksize; /* "optimal" block size for reads and writes */
245 7a4ee46d 2003-11-23 devnull u32int arenabase; /* base address of first arena */
248 7a4ee46d 2003-11-23 devnull * stored in the arena mapping table on disk
250 7a4ee46d 2003-11-23 devnull AMap *map;
251 7a4ee46d 2003-11-23 devnull int narenas;
255 7a4ee46d 2003-11-23 devnull * info about one block in the clump info cache
257 7a4ee46d 2003-11-23 devnull struct CIBlock
259 7a4ee46d 2003-11-23 devnull u32int block; /* blocks in the directory */
260 7a4ee46d 2003-11-23 devnull int offset; /* offsets of one clump in the data */
261 7a4ee46d 2003-11-23 devnull DBlock *data;
265 7a4ee46d 2003-11-23 devnull * an Arena is a log of Clumps, preceeded by an ArenaHeader,
266 7a4ee46d 2003-11-23 devnull * and followed by a Arena, each in one disk block.
267 7a4ee46d 2003-11-23 devnull * struct on disk is not always up to date, but should be self-consistent.
268 7a4ee46d 2003-11-23 devnull * to sync after reboot, follow clumps starting at used until ClumpFreeMagic if found.
269 7a4ee46d 2003-11-23 devnull * <struct name="Arena" type="Arena *">
270 7a4ee46d 2003-11-23 devnull * <field name="name" val="s->name" type="AName"/>
271 7a4ee46d 2003-11-23 devnull * <field name="version" val="s->version" type="U32int"/>
272 7a4ee46d 2003-11-23 devnull * <field name="partition" val="s->part->name" type="AName"/>
273 7a4ee46d 2003-11-23 devnull * <field name="blocksize" val="s->blocksize" type="U32int"/>
274 7a4ee46d 2003-11-23 devnull * <field name="start" val="s->base" type="U64int"/>
275 7a4ee46d 2003-11-23 devnull * <field name="stop" val="s->base+2*s->blocksize" type="U64int"/>
276 7a4ee46d 2003-11-23 devnull * <field name="created" val="s->ctime" type="U32int"/>
277 7a4ee46d 2003-11-23 devnull * <field name="modified" val="s->wtime" type="U32int"/>
278 7a4ee46d 2003-11-23 devnull * <field name="sealed" val="s->sealed" type="Sealed"/>
279 7a4ee46d 2003-11-23 devnull * <field name="score" val="s->score" type="Score"/>
280 7a4ee46d 2003-11-23 devnull * <field name="clumps" val="s->clumps" type="U32int"/>
281 7a4ee46d 2003-11-23 devnull * <field name="compressedclumps" val="s->cclumps" type="U32int"/>
282 7a4ee46d 2003-11-23 devnull * <field name="data" val="s->uncsize" type="U64int"/>
283 7a4ee46d 2003-11-23 devnull * <field name="compresseddata" val="s->used - s->clumps * ClumpSize" type="U64int"/>
284 7a4ee46d 2003-11-23 devnull * <field name="storage" val="s->used + s->clumps * ClumpInfoSize" type="U64int"/>
285 7a4ee46d 2003-11-23 devnull * </struct>
287 7a4ee46d 2003-11-23 devnull struct Arena
289 7a4ee46d 2003-11-23 devnull QLock lock; /* lock for arena fields, writing to disk */
290 7a4ee46d 2003-11-23 devnull Part *part; /* partition in which arena lives */
291 7a4ee46d 2003-11-23 devnull int blocksize; /* size of block to read or write */
292 7a4ee46d 2003-11-23 devnull u64int base; /* base address on disk */
293 7a4ee46d 2003-11-23 devnull u64int size; /* total space in the arena */
294 7a4ee46d 2003-11-23 devnull u64int limit; /* storage limit for clumps */
295 7a4ee46d 2003-11-23 devnull u8int score[VtScoreSize]; /* score of the entire sealed & summed arena */
297 7a4ee46d 2003-11-23 devnull int clumpmax; /* ClumpInfos per block */
298 7a4ee46d 2003-11-23 devnull CIBlock cib; /* dirty clump directory block */
301 7a4ee46d 2003-11-23 devnull * fields stored on disk
303 7a4ee46d 2003-11-23 devnull u32int version;
304 7a4ee46d 2003-11-23 devnull char name[ANameSize]; /* text label */
305 7a4ee46d 2003-11-23 devnull u32int clumps; /* number of allocated clumps */
306 7a4ee46d 2003-11-23 devnull u32int cclumps; /* clumps which are compressed; informational only */
307 7a4ee46d 2003-11-23 devnull u32int ctime; /* first time a block was written */
308 7a4ee46d 2003-11-23 devnull u32int wtime; /* last time a block was written */
309 7a4ee46d 2003-11-23 devnull u64int used; /* number of bytes currently used */
310 7a4ee46d 2003-11-23 devnull u64int uncsize; /* total of all clumps's uncsize; informational only */
311 7a4ee46d 2003-11-23 devnull u8int sealed; /* arena all filled up? */
315 7a4ee46d 2003-11-23 devnull * redundant storage of some fields at the beginning of each arena
317 7a4ee46d 2003-11-23 devnull struct ArenaHead
319 7a4ee46d 2003-11-23 devnull u32int version;
320 7a4ee46d 2003-11-23 devnull char name[ANameSize];
321 7a4ee46d 2003-11-23 devnull u32int blocksize;
322 7a4ee46d 2003-11-23 devnull u64int size;
326 7a4ee46d 2003-11-23 devnull * most interesting meta information for a clump.
327 7a4ee46d 2003-11-23 devnull * stored in each clump's header and in the Arena's directory,
328 7a4ee46d 2003-11-23 devnull * stored in reverse order just prior to the arena trailer
330 7a4ee46d 2003-11-23 devnull struct ClumpInfo
332 7a4ee46d 2003-11-23 devnull u8int type;
333 7a4ee46d 2003-11-23 devnull u16int size; /* size of disk data, not including header */
334 7a4ee46d 2003-11-23 devnull u16int uncsize; /* size of uncompressed data */
335 7a4ee46d 2003-11-23 devnull u8int score[VtScoreSize]; /* score of the uncompressed data only */
339 7a4ee46d 2003-11-23 devnull * header for an immutable clump of data
341 7a4ee46d 2003-11-23 devnull struct Clump
343 7a4ee46d 2003-11-23 devnull ClumpInfo info;
344 7a4ee46d 2003-11-23 devnull u8int encoding;
345 7a4ee46d 2003-11-23 devnull u32int creator; /* initial client which wrote the block */
346 7a4ee46d 2003-11-23 devnull u32int time; /* creation at gmt seconds since 1/1/1970 */
350 7a4ee46d 2003-11-23 devnull * index of all clumps according to their score
351 7a4ee46d 2003-11-23 devnull * this is just a wrapper to tie together the index sections
352 7a4ee46d 2003-11-23 devnull * <struct name="Index" type="Index *">
353 7a4ee46d 2003-11-23 devnull * <field name="name" val="s->name" type="AName"/>
354 7a4ee46d 2003-11-23 devnull * <field name="version" val="s->version" type="U32int"/>
355 7a4ee46d 2003-11-23 devnull * <field name="blocksize" val="s->blocksize" type="U32int"/>
356 7a4ee46d 2003-11-23 devnull * <field name="tabsize" val="s->tabsize" type="U32int"/>
357 7a4ee46d 2003-11-23 devnull * <field name="buckets" val="s->buckets" type="U32int"/>
358 7a4ee46d 2003-11-23 devnull * <field name="buckdiv" val="s->div" type="U32int"/>
359 333c1dcc 2004-03-13 devnull * <field name="bitblocks" val="s->div" type="U32int"/>
360 333c1dcc 2004-03-13 devnull * <field name="maxdepth" val="s->div" type="U32int"/>
361 333c1dcc 2004-03-13 devnull * <field name="bitkeylog" val="s->div" type="U32int"/>
362 333c1dcc 2004-03-13 devnull * <field name="bitkeymask" val="s->div" type="U32int"/>
363 7a4ee46d 2003-11-23 devnull * <array name="sect" val="&s->smap[i]" elems="s->nsects" type="Amap"/>
364 7a4ee46d 2003-11-23 devnull * <array name="amap" val="&s->amap[i]" elems="s->narenas" type="Amap"/>
365 7a4ee46d 2003-11-23 devnull * <array name="arena" val="s->arenas[i]" elems="s->narenas" type="Arena"/>
366 7a4ee46d 2003-11-23 devnull * </struct>
367 7a4ee46d 2003-11-23 devnull * <struct name="Amap" type="AMap *">
368 7a4ee46d 2003-11-23 devnull * <field name="name" val="s->name" type="AName"/>
369 7a4ee46d 2003-11-23 devnull * <field name="start" val="s->start" type="U64int"/>
370 7a4ee46d 2003-11-23 devnull * <field name="stop" val="s->stop" type="U64int"/>
371 7a4ee46d 2003-11-23 devnull * </struct>
373 7a4ee46d 2003-11-23 devnull struct Index
375 7a4ee46d 2003-11-23 devnull u32int div; /* divisor for mapping score to bucket */
376 7a4ee46d 2003-11-23 devnull u32int buckets; /* last bucket used in disk hash table */
377 7a4ee46d 2003-11-23 devnull u32int blocksize;
378 7a4ee46d 2003-11-23 devnull u32int tabsize; /* max. bytes in index config */
379 9ffbb5ad 2004-03-12 devnull u32int bitblocks;
380 9ffbb5ad 2004-03-12 devnull u32int maxdepth;
381 9ffbb5ad 2004-03-12 devnull u32int bitkeylog;
382 9ffbb5ad 2004-03-12 devnull u32int bitkeymask;
384 7a4ee46d 2003-11-23 devnull int mapalloc; /* first arena to check when adding a lump */
385 7a4ee46d 2003-11-23 devnull Arena **arenas; /* arenas in the mapping */
386 7a4ee46d 2003-11-23 devnull ISect **sects; /* sections which hold the buckets */
389 7a4ee46d 2003-11-23 devnull * fields stored in config file
391 7a4ee46d 2003-11-23 devnull u32int version;
392 7a4ee46d 2003-11-23 devnull char name[ANameSize]; /* text label */
393 7a4ee46d 2003-11-23 devnull int nsects;
394 7a4ee46d 2003-11-23 devnull AMap *smap; /* mapping of buckets to index sections */
395 7a4ee46d 2003-11-23 devnull int narenas;
396 7a4ee46d 2003-11-23 devnull AMap *amap; /* mapping from index addesses to arenas */
400 7a4ee46d 2003-11-23 devnull * one part of the bucket storage for an index.
401 7a4ee46d 2003-11-23 devnull * the index blocks are sequentially allocated
402 7a4ee46d 2003-11-23 devnull * across all of the sections.
404 7a4ee46d 2003-11-23 devnull struct ISect
406 7a4ee46d 2003-11-23 devnull Part *part;
407 7a4ee46d 2003-11-23 devnull int blocklog; /* log2(blocksize) */
408 7a4ee46d 2003-11-23 devnull int buckmax; /* max. entries in a index bucket */
409 7a4ee46d 2003-11-23 devnull u32int tabbase; /* base address of index config table on disk */
410 7a4ee46d 2003-11-23 devnull u32int tabsize; /* max. bytes in index config */
413 7a4ee46d 2003-11-23 devnull * fields stored on disk
415 7a4ee46d 2003-11-23 devnull u32int version;
416 7a4ee46d 2003-11-23 devnull char name[ANameSize]; /* text label */
417 7a4ee46d 2003-11-23 devnull char index[ANameSize]; /* index owning the section */
418 7a4ee46d 2003-11-23 devnull u32int blocksize; /* size of hash buckets in index */
419 7a4ee46d 2003-11-23 devnull u32int blockbase; /* address of start of on disk index table */
420 7a4ee46d 2003-11-23 devnull u32int blocks; /* total blocks on disk; some may be unused */
421 7a4ee46d 2003-11-23 devnull u32int start; /* first bucket in this section */
422 7a4ee46d 2003-11-23 devnull u32int stop; /* limit of buckets in this section */
426 7a4ee46d 2003-11-23 devnull * externally interesting part of an IEntry
428 7a4ee46d 2003-11-23 devnull struct IAddr
430 7a4ee46d 2003-11-23 devnull u64int addr;
431 7a4ee46d 2003-11-23 devnull u16int size; /* uncompressed size */
432 7a4ee46d 2003-11-23 devnull u8int type; /* type of block */
433 7a4ee46d 2003-11-23 devnull u8int blocks; /* arena io quanta for Clump + data */
437 7a4ee46d 2003-11-23 devnull * entries in the index
438 7a4ee46d 2003-11-23 devnull * kept in IBuckets in the disk index table,
439 7a4ee46d 2003-11-23 devnull * cached in the memory ICache.
441 7a4ee46d 2003-11-23 devnull struct IEntry
443 7a4ee46d 2003-11-23 devnull u8int score[VtScoreSize];
444 7a4ee46d 2003-11-23 devnull IEntry *next; /* next in hash chain */
445 7a4ee46d 2003-11-23 devnull u32int wtime; /* last write time */
446 7a4ee46d 2003-11-23 devnull u16int train; /* relative train containing the most recent ref; 0 if no ref, 1 if in same car */
447 7a4ee46d 2003-11-23 devnull u8int rac; /* read ahead count */
448 7a4ee46d 2003-11-23 devnull IAddr ia;
452 7a4ee46d 2003-11-23 devnull * buckets in the on disk index table
454 7a4ee46d 2003-11-23 devnull struct IBucket
456 7a4ee46d 2003-11-23 devnull u16int n; /* number of active indices */
457 9ffbb5ad 2004-03-12 devnull u32int depth; /* depth in version 2 (was overflow in v1) */
458 7a4ee46d 2003-11-23 devnull u8int *data;
462 7a4ee46d 2003-11-23 devnull * temporary buffers used by individual threads
464 7a4ee46d 2003-11-23 devnull struct ZBlock
466 7a4ee46d 2003-11-23 devnull u32int len;
467 7a4ee46d 2003-11-23 devnull u8int *data;
471 7a4ee46d 2003-11-23 devnull * simple input buffer for a '\0' terminated text file
473 7a4ee46d 2003-11-23 devnull struct IFile
475 7a4ee46d 2003-11-23 devnull char *name; /* name of the file */
476 7a4ee46d 2003-11-23 devnull ZBlock *b; /* entire contents of file */
477 7a4ee46d 2003-11-23 devnull u32int pos; /* current position in the file */
481 7a4ee46d 2003-11-23 devnull * statistics about the operation of the server
482 7a4ee46d 2003-11-23 devnull * mainly for performance monitoring and profiling.
484 7a4ee46d 2003-11-23 devnull struct Stats
486 7a4ee46d 2003-11-23 devnull QLock lock;
487 7a4ee46d 2003-11-23 devnull long lumpwrites; /* protocol block writes */
488 7a4ee46d 2003-11-23 devnull long lumpreads; /* protocol block reads */
489 7a4ee46d 2003-11-23 devnull long lumphit; /* lump cache hit */
490 7a4ee46d 2003-11-23 devnull long lumpmiss; /* lump cache miss */
491 7a4ee46d 2003-11-23 devnull long clumpwrites; /* clumps to disk */
492 7a4ee46d 2003-11-23 devnull vlong clumpbwrites; /* clump data bytes to disk */
493 7a4ee46d 2003-11-23 devnull vlong clumpbcomp; /* clump bytes compressed */
494 7a4ee46d 2003-11-23 devnull long clumpreads; /* clumps from disk */
495 7a4ee46d 2003-11-23 devnull vlong clumpbreads; /* clump data bytes from disk */
496 7a4ee46d 2003-11-23 devnull vlong clumpbuncomp; /* clump bytes uncompressed */
497 7a4ee46d 2003-11-23 devnull long ciwrites; /* clump directory to disk */
498 7a4ee46d 2003-11-23 devnull long cireads; /* clump directory from disk */
499 7a4ee46d 2003-11-23 devnull long indexwrites; /* index to disk */
500 7a4ee46d 2003-11-23 devnull long indexreads; /* index from disk */
501 7a4ee46d 2003-11-23 devnull long indexwreads; /* for writing a new entry */
502 7a4ee46d 2003-11-23 devnull long indexareads; /* for allocating an overflow block */
503 333c1dcc 2004-03-13 devnull long indexsplits; /* index block splits */
504 7a4ee46d 2003-11-23 devnull long diskwrites; /* total disk writes */
505 7a4ee46d 2003-11-23 devnull long diskreads; /* total disk reads */
506 7a4ee46d 2003-11-23 devnull vlong diskbwrites; /* total disk bytes written */
507 7a4ee46d 2003-11-23 devnull vlong diskbreads; /* total disk bytes read */
508 7a4ee46d 2003-11-23 devnull long pchit; /* partition cache hit */
509 7a4ee46d 2003-11-23 devnull long pcmiss; /* partition cache miss */
510 7a4ee46d 2003-11-23 devnull long pcreads; /* partition cache reads from disk */
511 7a4ee46d 2003-11-23 devnull vlong pcbreads; /* partition cache bytes read */
512 7a4ee46d 2003-11-23 devnull long icinserts; /* stores into index cache */
513 7a4ee46d 2003-11-23 devnull long iclookups; /* index cache lookups */
514 7a4ee46d 2003-11-23 devnull long ichits; /* hits in the cache */
515 7a4ee46d 2003-11-23 devnull long icfills; /* successful fills from index */
516 24998851 2004-03-11 devnull long absorbedwrites; /* disk writes absorbed by dcache */
517 24998851 2004-03-11 devnull long dirtydblocks; /* blocks dirtied */
518 24998851 2004-03-11 devnull long dcacheflushes; /* times dcache has flushed */
519 24998851 2004-03-11 devnull long dcacheflushwrites; /* blocks written by those flushes */
522 7a4ee46d 2003-11-23 devnull extern Index *mainindex;
523 7a4ee46d 2003-11-23 devnull extern u32int maxblocksize; /* max. block size used by any partition */
524 7a4ee46d 2003-11-23 devnull extern int paranoid; /* should verify hashes on disk read */
525 7a4ee46d 2003-11-23 devnull extern int queuewrites; /* put all lump writes on a queue and finish later */
526 7a4ee46d 2003-11-23 devnull extern int readonly; /* only allowed to read the disk data */
527 7a4ee46d 2003-11-23 devnull extern Stats stats;
528 7a4ee46d 2003-11-23 devnull extern u8int zeroscore[VtScoreSize];
