1 a0d146ed 2005-07-12 devnull #include "stdinc.h"
  2 a0d146ed 2005-07-12 devnull #include "dat.h"
  3 a0d146ed 2005-07-12 devnull #include "fns.h"
  4 a0d146ed 2005-07-12 devnull 
  5 e7e953b3 2012-04-22 rsc int			bootstrap = 0;
  6 28b49df3 2006-07-18 devnull int			syncwrites = 0;
  7 a0d146ed 2005-07-12 devnull int			queuewrites = 0;
  8 a0d146ed 2005-07-12 devnull int			writestodevnull = 0;
  9 27d28098 2007-04-21 devnull int			verifywrites = 0;
 10 a0d146ed 2005-07-12 devnull 
 11 7a400ee9 2007-09-25 rsc static Packet		*readilump(Lump *u, IAddr *ia, u8int *score);
 12 a0d146ed 2005-07-12 devnull 
 13 27d28098 2007-04-21 devnull /*
 14 27d28098 2007-04-21 devnull  * Some of this logic is duplicated in hdisk.c
 15 27d28098 2007-04-21 devnull  */
 16 a0d146ed 2005-07-12 devnull Packet*
 17 a0d146ed 2005-07-12 devnull readlump(u8int *score, int type, u32int size, int *cached)
 18 a0d146ed 2005-07-12 devnull {
 19 a0d146ed 2005-07-12 devnull 	Lump *u;
 20 a0d146ed 2005-07-12 devnull 	Packet *p;
 21 a0d146ed 2005-07-12 devnull 	IAddr ia;
 22 a0d146ed 2005-07-12 devnull 	u32int n;
 23 a0d146ed 2005-07-12 devnull 
 24 a0d146ed 2005-07-12 devnull 	trace(TraceLump, "readlump enter");
 25 a0d146ed 2005-07-12 devnull /*
 26 a0d146ed 2005-07-12 devnull 	qlock(&stats.lock);
 27 a0d146ed 2005-07-12 devnull 	stats.lumpreads++;
 28 a0d146ed 2005-07-12 devnull 	qunlock(&stats.lock);
 29 a0d146ed 2005-07-12 devnull */
 30 a0d146ed 2005-07-12 devnull 	if(scorecmp(score, zeroscore) == 0)
 31 a0d146ed 2005-07-12 devnull 		return packetalloc();
 32 a0d146ed 2005-07-12 devnull 	u = lookuplump(score, type);
 33 a0d146ed 2005-07-12 devnull 	if(u->data != nil){
 34 a0d146ed 2005-07-12 devnull 		trace(TraceLump, "readlump lookuplump hit");
 35 a0d146ed 2005-07-12 devnull 		if(cached)
 36 a0d146ed 2005-07-12 devnull 			*cached = 1;
 37 a0d146ed 2005-07-12 devnull 		n = packetsize(u->data);
 38 a0d146ed 2005-07-12 devnull 		if(n > size){
 39 a0d146ed 2005-07-12 devnull 			seterr(EOk, "read too small: asked for %d need at least %d", size, n);
 40 a0d146ed 2005-07-12 devnull 			putlump(u);
 41 a0d146ed 2005-07-12 devnull 
 42 a0d146ed 2005-07-12 devnull 			return nil;
 43 a0d146ed 2005-07-12 devnull 		}
 44 a0d146ed 2005-07-12 devnull 		p = packetdup(u->data, 0, n);
 45 a0d146ed 2005-07-12 devnull 		putlump(u);
 46 a0d146ed 2005-07-12 devnull 		return p;
 47 a0d146ed 2005-07-12 devnull 	}
 48 a0d146ed 2005-07-12 devnull 
 49 a0d146ed 2005-07-12 devnull 	if(cached)
 50 a0d146ed 2005-07-12 devnull 		*cached = 0;
 51 a0d146ed 2005-07-12 devnull 
 52 7a400ee9 2007-09-25 rsc 	if(lookupscore(score, type, &ia) < 0){
 53 28b49df3 2006-07-18 devnull 		/* ZZZ place to check for someone trying to guess scores */
 54 a0d146ed 2005-07-12 devnull 		seterr(EOk, "no block with score %V/%d exists", score, type);
 55 a0d146ed 2005-07-12 devnull 
 56 a0d146ed 2005-07-12 devnull 		putlump(u);
 57 a0d146ed 2005-07-12 devnull 		return nil;
 58 a0d146ed 2005-07-12 devnull 	}
 59 a0d146ed 2005-07-12 devnull 	if(ia.size > size){
 60 a0d146ed 2005-07-12 devnull 		seterr(EOk, "read too small 1: asked for %d need at least %d", size, ia.size);
 61 a0d146ed 2005-07-12 devnull 
 62 a0d146ed 2005-07-12 devnull 		putlump(u);
 63 a0d146ed 2005-07-12 devnull 		return nil;
 64 a0d146ed 2005-07-12 devnull 	}
 65 a0d146ed 2005-07-12 devnull 
 66 a0d146ed 2005-07-12 devnull 	trace(TraceLump, "readlump readilump");
 67 7a400ee9 2007-09-25 rsc 	p = readilump(u, &ia, score);
 68 a0d146ed 2005-07-12 devnull 	putlump(u);
 69 a0d146ed 2005-07-12 devnull 
 70 a0d146ed 2005-07-12 devnull 	trace(TraceLump, "readlump exit");
 71 a0d146ed 2005-07-12 devnull 	return p;
 72 a0d146ed 2005-07-12 devnull }
 73 a0d146ed 2005-07-12 devnull 
 74 a0d146ed 2005-07-12 devnull /*
 75 a0d146ed 2005-07-12 devnull  * save away a lump, and return it's score.
 76 a0d146ed 2005-07-12 devnull  * doesn't store duplicates, but checks that the data is really the same.
 77 a0d146ed 2005-07-12 devnull  */
 78 a0d146ed 2005-07-12 devnull int
 79 a0d146ed 2005-07-12 devnull writelump(Packet *p, u8int *score, int type, u32int creator, uint ms)
 80 a0d146ed 2005-07-12 devnull {
 81 a0d146ed 2005-07-12 devnull 	Lump *u;
 82 a0d146ed 2005-07-12 devnull 	int ok;
 83 a0d146ed 2005-07-12 devnull 
 84 a0d146ed 2005-07-12 devnull /*
 85 a0d146ed 2005-07-12 devnull 	qlock(&stats.lock);
 86 a0d146ed 2005-07-12 devnull 	stats.lumpwrites++;
 87 a0d146ed 2005-07-12 devnull 	qunlock(&stats.lock);
 88 a0d146ed 2005-07-12 devnull */
 89 a0d146ed 2005-07-12 devnull 
 90 a0d146ed 2005-07-12 devnull 	packetsha1(p, score);
 91 a0d146ed 2005-07-12 devnull 	if(packetsize(p) == 0 || writestodevnull==1){
 92 a0d146ed 2005-07-12 devnull 		packetfree(p);
 93 a0d146ed 2005-07-12 devnull 		return 0;
 94 a0d146ed 2005-07-12 devnull 	}
 95 a0d146ed 2005-07-12 devnull 
 96 a0d146ed 2005-07-12 devnull 	u = lookuplump(score, type);
 97 a0d146ed 2005-07-12 devnull 	if(u->data != nil){
 98 a0d146ed 2005-07-12 devnull 		ok = 0;
 99 a0d146ed 2005-07-12 devnull 		if(packetcmp(p, u->data) != 0){
100 28b49df3 2006-07-18 devnull 			uchar nscore[VtScoreSize];
101 28b49df3 2006-07-18 devnull 
102 28b49df3 2006-07-18 devnull 			packetsha1(u->data, nscore);
103 28b49df3 2006-07-18 devnull 			if(scorecmp(u->score, score) != 0)
104 28b49df3 2006-07-18 devnull 				seterr(EStrange, "lookuplump returned bad score %V not %V", u->score, score);
105 28b49df3 2006-07-18 devnull 			else if(scorecmp(u->score, nscore) != 0)
106 28b49df3 2006-07-18 devnull 				seterr(EStrange, "lookuplump returned bad data %V not %V", nscore, u->score);
107 28b49df3 2006-07-18 devnull 			else
108 28b49df3 2006-07-18 devnull 				seterr(EStrange, "score collision %V", score);
109 a0d146ed 2005-07-12 devnull 			ok = -1;
110 a0d146ed 2005-07-12 devnull 		}
111 a0d146ed 2005-07-12 devnull 		packetfree(p);
112 a0d146ed 2005-07-12 devnull 		putlump(u);
113 a0d146ed 2005-07-12 devnull 		return ok;
114 a0d146ed 2005-07-12 devnull 	}
115 a0d146ed 2005-07-12 devnull 
116 a0d146ed 2005-07-12 devnull 	if(writestodevnull==2){
117 a0d146ed 2005-07-12 devnull 		packetfree(p);
118 a0d146ed 2005-07-12 devnull 		return 0;
119 a0d146ed 2005-07-12 devnull 	}
120 a0d146ed 2005-07-12 devnull 
121 a0d146ed 2005-07-12 devnull 	if(queuewrites)
122 a0d146ed 2005-07-12 devnull 		return queuewrite(u, p, creator, ms);
123 a0d146ed 2005-07-12 devnull 
124 a0d146ed 2005-07-12 devnull 	ok = writeqlump(u, p, creator, ms);
125 a0d146ed 2005-07-12 devnull 
126 a0d146ed 2005-07-12 devnull 	putlump(u);
127 a0d146ed 2005-07-12 devnull 	return ok;
128 a0d146ed 2005-07-12 devnull }
129 a0d146ed 2005-07-12 devnull 
130 a0d146ed 2005-07-12 devnull int
131 a0d146ed 2005-07-12 devnull writeqlump(Lump *u, Packet *p, int creator, uint ms)
132 a0d146ed 2005-07-12 devnull {
133 a0d146ed 2005-07-12 devnull 	ZBlock *flat;
134 a0d146ed 2005-07-12 devnull 	Packet *old;
135 a0d146ed 2005-07-12 devnull 	IAddr ia;
136 a0d146ed 2005-07-12 devnull 	int ok;
137 a0d146ed 2005-07-12 devnull 
138 7a400ee9 2007-09-25 rsc 	if(lookupscore(u->score, u->type, &ia) == 0){
139 27d28098 2007-04-21 devnull 		if(verifywrites == 0){
140 27d28098 2007-04-21 devnull 			/* assume the data is here! */
141 27d28098 2007-04-21 devnull 			packetfree(p);
142 27d28098 2007-04-21 devnull 			ms = msec() - ms;
143 27d28098 2007-04-21 devnull 			addstat2(StatRpcWriteOld, 1, StatRpcWriteOldTime, ms);
144 27d28098 2007-04-21 devnull 			return 0;
145 27d28098 2007-04-21 devnull 		}
146 a0d146ed 2005-07-12 devnull 
147 a0d146ed 2005-07-12 devnull 		/*
148 a0d146ed 2005-07-12 devnull 		 * if the read fails,
149 a0d146ed 2005-07-12 devnull 		 * assume it was corrupted data and store the block again
150 a0d146ed 2005-07-12 devnull 		 */
151 7a400ee9 2007-09-25 rsc 		old = readilump(u, &ia, u->score);
152 a0d146ed 2005-07-12 devnull 		if(old != nil){
153 a0d146ed 2005-07-12 devnull 			ok = 0;
154 a0d146ed 2005-07-12 devnull 			if(packetcmp(p, old) != 0){
155 28b49df3 2006-07-18 devnull 				uchar nscore[VtScoreSize];
156 28b49df3 2006-07-18 devnull 
157 28b49df3 2006-07-18 devnull 				packetsha1(old, nscore);
158 28b49df3 2006-07-18 devnull 				if(scorecmp(u->score, nscore) != 0)
159 28b49df3 2006-07-18 devnull 					seterr(EStrange, "readilump returned bad data %V not %V", nscore, u->score);
160 28b49df3 2006-07-18 devnull 				else
161 28b49df3 2006-07-18 devnull 					seterr(EStrange, "score collision %V", u->score);
162 a0d146ed 2005-07-12 devnull 				ok = -1;
163 a0d146ed 2005-07-12 devnull 			}
164 a0d146ed 2005-07-12 devnull 			packetfree(p);
165 a0d146ed 2005-07-12 devnull 			packetfree(old);
166 a0d146ed 2005-07-12 devnull 
167 a0d146ed 2005-07-12 devnull 			ms = msec() - ms;
168 a0d146ed 2005-07-12 devnull 			addstat2(StatRpcWriteOld, 1, StatRpcWriteOldTime, ms);
169 a0d146ed 2005-07-12 devnull 			return ok;
170 a0d146ed 2005-07-12 devnull 		}
171 a0d146ed 2005-07-12 devnull 		logerr(EAdmin, "writelump: read %V failed, rewriting: %r\n", u->score);
172 a0d146ed 2005-07-12 devnull 	}
173 a0d146ed 2005-07-12 devnull 
174 a0d146ed 2005-07-12 devnull 	flat = packet2zblock(p, packetsize(p));
175 a0d146ed 2005-07-12 devnull 	ok = storeclump(mainindex, flat, u->score, u->type, creator, &ia);
176 a0d146ed 2005-07-12 devnull 	freezblock(flat);
177 a0d146ed 2005-07-12 devnull 	if(ok == 0)
178 a0d146ed 2005-07-12 devnull 		insertlump(u, p);
179 a0d146ed 2005-07-12 devnull 	else
180 a0d146ed 2005-07-12 devnull 		packetfree(p);
181 fa325e9b 2020-01-10 cross 
182 28b49df3 2006-07-18 devnull 	if(syncwrites){
183 28b49df3 2006-07-18 devnull 		flushdcache();
184 28b49df3 2006-07-18 devnull 		flushicache();
185 28b49df3 2006-07-18 devnull 		flushdcache();
186 28b49df3 2006-07-18 devnull 	}
187 a0d146ed 2005-07-12 devnull 
188 a0d146ed 2005-07-12 devnull 	ms = msec() - ms;
189 a0d146ed 2005-07-12 devnull 	addstat2(StatRpcWriteNew, 1, StatRpcWriteNewTime, ms);
190 a0d146ed 2005-07-12 devnull 	return ok;
191 a0d146ed 2005-07-12 devnull }
192 a0d146ed 2005-07-12 devnull 
193 a0d146ed 2005-07-12 devnull static Packet*
194 7a400ee9 2007-09-25 rsc readilump(Lump *u, IAddr *ia, u8int *score)
195 a0d146ed 2005-07-12 devnull {
196 a0d146ed 2005-07-12 devnull 	Arena *arena;
197 a0d146ed 2005-07-12 devnull 	ZBlock *zb;
198 a0d146ed 2005-07-12 devnull 	Packet *p, *pp;
199 a0d146ed 2005-07-12 devnull 	Clump cl;
200 7a400ee9 2007-09-25 rsc 	u64int aa;
201 a0d146ed 2005-07-12 devnull 	u8int sc[VtScoreSize];
202 a0d146ed 2005-07-12 devnull 
203 a0d146ed 2005-07-12 devnull 	trace(TraceLump, "readilump enter");
204 a0d146ed 2005-07-12 devnull 	arena = amapitoa(mainindex, ia->addr, &aa);
205 a0d146ed 2005-07-12 devnull 	if(arena == nil){
206 a0d146ed 2005-07-12 devnull 		trace(TraceLump, "readilump amapitoa failed");
207 a0d146ed 2005-07-12 devnull 		return nil;
208 a0d146ed 2005-07-12 devnull 	}
209 a0d146ed 2005-07-12 devnull 
210 a0d146ed 2005-07-12 devnull 	trace(TraceLump, "readilump loadclump");
211 a0d146ed 2005-07-12 devnull 	zb = loadclump(arena, aa, ia->blocks, &cl, sc, paranoid);
212 a0d146ed 2005-07-12 devnull 	if(zb == nil){
213 a0d146ed 2005-07-12 devnull 		trace(TraceLump, "readilump loadclump failed");
214 a0d146ed 2005-07-12 devnull 		return nil;
215 a0d146ed 2005-07-12 devnull 	}
216 a0d146ed 2005-07-12 devnull 
217 a0d146ed 2005-07-12 devnull 	if(ia->size != cl.info.uncsize){
218 a0d146ed 2005-07-12 devnull 		seterr(EInconsist, "index and clump size mismatch");
219 a0d146ed 2005-07-12 devnull 		freezblock(zb);
220 a0d146ed 2005-07-12 devnull 		return nil;
221 a0d146ed 2005-07-12 devnull 	}
222 a0d146ed 2005-07-12 devnull 	if(ia->type != cl.info.type){
223 a0d146ed 2005-07-12 devnull 		seterr(EInconsist, "index and clump type mismatch");
224 a0d146ed 2005-07-12 devnull 		freezblock(zb);
225 a0d146ed 2005-07-12 devnull 		return nil;
226 a0d146ed 2005-07-12 devnull 	}
227 a0d146ed 2005-07-12 devnull 	if(scorecmp(score, sc) != 0){
228 a0d146ed 2005-07-12 devnull 		seterr(ECrash, "score mismatch");
229 a0d146ed 2005-07-12 devnull 		freezblock(zb);
230 a0d146ed 2005-07-12 devnull 		return nil;
231 a0d146ed 2005-07-12 devnull 	}
232 a0d146ed 2005-07-12 devnull 
233 a0d146ed 2005-07-12 devnull 	trace(TraceLump, "readilump success");
234 a0d146ed 2005-07-12 devnull 	p = zblock2packet(zb, cl.info.uncsize);
235 a0d146ed 2005-07-12 devnull 	freezblock(zb);
236 a0d146ed 2005-07-12 devnull 	pp = packetdup(p, 0, packetsize(p));
237 a0d146ed 2005-07-12 devnull 	trace(TraceLump, "readilump insertlump");
238 a0d146ed 2005-07-12 devnull 	insertlump(u, pp);
239 a0d146ed 2005-07-12 devnull 	trace(TraceLump, "readilump exit");
240 a0d146ed 2005-07-12 devnull 	return p;
241 a0d146ed 2005-07-12 devnull }