commit 7e4524011b432ca5225d9768ba7f11a377776fbf
from: rsc <devnull@localhost>
date: Fri Apr 27 17:52:24 2007 UTC

checkpoint

commit - 9ec61f3ede67c5df2726c9e67736fec8af6d8b80
commit + 7e4524011b432ca5225d9768ba7f11a377776fbf
blob - 0121d4512d7bca8a694f226c10db52baca86068e
blob + 4d8ab578e2cf177bcb3dcc2546627bfd48e1004f
--- src/cmd/venti/srv/arena.c
+++ src/cmd/venti/srv/arena.c
@@ -295,7 +295,7 @@ writeaclump(Arena *arena, Clump *c, u8int *clbuf, u64i
 	if(arena->memstats.sealed
 	|| aa + n + U32Size + arenadirsize(arena, arena->memstats.clumps + 1) > arena->size){
 		if(!arena->memstats.sealed){
-			trace(0, "seal memstats %s", arena->name);
+			logerr(EOk, "seal memstats %s", arena->name);
 			arena->memstats.sealed = 1;
 			as.arena = arena;
 			as.aa = start+aa;
@@ -422,16 +422,10 @@ setatailstate(AState *as)
 		return;
 	}
 
-	/*
- 	 * Walk backward until we find the last time these were in sync.
-	 */
-	for(j=i; --j>=0; ){
+	for(j=0; j<=i; j++){
 		a = ix->arenas[j];
 		if(atailcmp(&a->diskstats, &a->memstats) == 0)
-			break;
-	}
-	for(j++; j<=i; j++){
-		a = ix->arenas[j];
+			continue;
 		qlock(&a->lock);
 		osealed = a->diskstats.sealed;
 		if(j == i)
blob - 04fd65105eae165c1ebddc1d074517a683ee50d2
blob + bd398815e031cf80ba718ab1f5357ac67c690048
--- src/cmd/venti/srv/bloom.c
+++ src/cmd/venti/srv/bloom.c
@@ -26,7 +26,6 @@ bloominit(Bloom *b, vlong vsize, u8int *data)
 		if(unpackbloomhead(b, data) < 0)
 			return -1;
 	
-fprint(2, "bloom size %lud nhash %d\n", b->size, b->nhash);
 	b->bitmask = (b->size<<3) - 1;
 	b->data = data;
 	return 0;
@@ -54,7 +53,19 @@ readbloom(Part *p)
 	 */
 	if(bloominit(b, 0, buf) < 0){
 		vtfree(b);
+		freepart(p);
 		return nil;
+	}else{
+		/*
+		 * default block size is system page size.
+		 * the bloom filter is usually very big.
+		 * bump the block size up to speed i/o.
+		 */
+		if(p->blocksize < (1<<20)){
+			p->blocksize = 1<<20;
+			if(p->blocksize > p->size)
+				p->blocksize = p->size;
+		}
 	}
 	b->part = p;
 	b->data = nil;
blob - 275d4fc91130eca836cd0615ba5fd68313d8136f
blob + 2f69a53b6595a2d5403151eb5b19902f7585b25d
--- src/cmd/venti/srv/buildindex.c
+++ src/cmd/venti/srv/buildindex.c
@@ -119,9 +119,10 @@ threadmain(int argc, char *argv[])
 	fprint(2, "%T read index\n");
 	isectdonechan = chancreate(sizeof(void*), 0);
 	for(i=0; i<ix->nsects; i++){
-		if(shouldprocess(ix->sects[i]))
+		if(shouldprocess(ix->sects[i])){
 			ix->sects[i]->writechan = chancreate(sizeof(IEntry), 0);
-		vtproc(isectproc, ix->sects[i]);
+			vtproc(isectproc, ix->sects[i]);
+		}
 	}
 	
 	for(i=0; i<nisect; i++)
blob - 4f87e77e81b3e06a67c85e8f2cf89680eec5e70a
blob + 52a5364d63bc81135f67b493292f29f43ef3f116
--- src/cmd/venti/srv/dcache.c
+++ src/cmd/venti/srv/dcache.c
@@ -715,6 +715,7 @@ static int
 parallelwrites(DBlock **b, DBlock **eb, int dirty)
 {
 	DBlock **p, **q;
+	Part *part;
 
 	for(p=b; p<eb && (*p)->dirty == dirty; p++){
 		assert(b<=p && p<eb);
@@ -724,6 +725,17 @@ parallelwrites(DBlock **b, DBlock **eb, int dirty)
 	for(p=b; p<q; p++){
 		assert(b<=p && p<eb);
 		recvp((*p)->writedonechan);
+	}
+	
+	/*
+	 * Flush the partitions that have been written to.
+	 */
+	part = nil;
+	for(p=b; p<q; p++){
+		if(part != (*p)->part){
+			part = (*p)->part;
+			flushpart(part);
+		}
 	}
 
 	return p-b;
blob - 2d3ed47c55d88b185454f3999ddc0cfac3a06b55
blob + 8f8fed4ed3cda8b7d79a84837e9af819e7b77250
--- src/cmd/venti/srv/icachewrite.c
+++ src/cmd/venti/srv/icachewrite.c
@@ -181,6 +181,7 @@ icachewritesect(Index *ix, ISect *is, u8int *buf)
 			err = -1;
 			continue;
 		}
+		flushpart(is->part);
 		addstat(StatIsectWriteBytes, nbuf);
 		addstat(StatIsectWrite, 1);
 		icacheclean(chunk);
blob - 16b37a07c28b737ff1d2612ed1aaf742072f32ba
blob + 7d477e7609db96c7bbc9d0b2c2061eb1960a823b
--- src/cmd/venti/srv/index.c
+++ src/cmd/venti/srv/index.c
@@ -259,8 +259,14 @@ newindex(char *name, ISect **sects, int n)
 	blocksize = sects[0]->blocksize;
 	tabsize = sects[0]->tabsize;
 	for(i = 0; i < n; i++){
-		if(sects[i]->start != 0 || sects[i]->stop != 0
-		|| sects[i]->index[0] != '\0'){
+		/*
+		 * allow index, start, and stop to be set if index is correct
+		 * and start and stop are what we would have picked.
+		 * this allows calling fmtindex to reformat the index after
+		 * replacing a bad index section with a freshly formatted one.
+		 * start and stop are checked below.
+		 */
+		if(sects[i]->index[0] != '\0' && strcmp(sects[i]->index, name) != 0){
 			seterr(EOk, "creating new index using non-empty section %s", sects[i]->name);
 			return nil;
 		}
@@ -318,6 +324,13 @@ newindex(char *name, ISect **sects, int n)
 		stop = start + sects[i]->blocks - xb / n;
 		if(i == n - 1)
 			stop = ub;
+
+		if(sects[i]->start != 0 || sects[i]->stop != 0)
+		if(sects[i]->start != start || sects[i]->stop != stop){
+			seterr(EOk, "creating new index using non-empty section %s", sects[i]->name);
+			return nil;
+		}
+
 		sects[i]->start = start;
 		sects[i]->stop = stop;
 		namecp(sects[i]->index, name);
@@ -367,8 +380,6 @@ initisect(Part *part)
 		seterr(EAdmin, "can't read index section header: %r");
 		return nil;
 	}
-print("read %s at %d: %.2ux %.2ux %.2ux %.2ux\n",
-	part->name, PartBlank, b->data[0], b->data[1], b->data[2], b->data[3]);
 
 	is = MKZ(ISect);
 	if(is == nil){
blob - a726dfde34f324f996e5ce0ac87dc3be9ba15abf
blob + e33c7b76ad268e08cd5a772fe181ece6510f2258
--- src/cmd/venti/srv/part.c
+++ src/cmd/venti/srv/part.c
@@ -15,6 +15,16 @@
 #include <ctype.h>
 #include "dat.h"
 #include "fns.h"
+
+/* TODO for linux:
+don't use O_DIRECT.
+use
+	posix_fadvise(fd, 0, 0, POSIX_FADV_NOREUSE);
+after block is read and also use
+	posix_fadvise(fd, 0, 0, POSIX_FADV_RANDOM);
+to disable readahead on the index partition.
+bump block size of bloom filter higher.
+*/
 
 u32int	maxblocksize;
 int	readonly;
@@ -157,6 +167,11 @@ initpart(char *name, int mode)
 }
 
 void
+flushpart(Part *part)
+{
+}
+
+void
 freepart(Part *part)
 {
 	if(part == nil)
@@ -397,11 +412,7 @@ rwpart(Part *part, int isread, u64int offset, u8int *b
 		 * Try to fix things up and continue.
 		 */
 		rerrstr(err, sizeof err);
-		if(strstr(err, "i/o timeout") || strstr(err, "i/o error")){
-			if(sdreset(part) >= 0)
-				reopen(part);
-			continue;
-		}else if(strstr(err, "partition has changed")){
+		if(strstr(err, "i/o timeout") || strstr(err, "i/o error") || strstr(err, "partition has changed")){
 			reopen(part);
 			continue;
 		}
@@ -583,9 +594,15 @@ reopen(Part *part)
 	
 	fprint(2, "reopen %s\n", part->filename);
 	if((fd = open(part->filename, ORDWR)) < 0){
-		fprint(2, "reopen %s: %r\n", part->filename);
-		return -1;
-	}	
+		if(access(part->filename, AEXIST) < 0){
+			sdreset(part);
+			fd = open(part->filename, ORDWR);
+		}
+		if(fd < 0){
+			fprint(2, "reopen %s: %r\n", part->filename);
+			return -1;
+		}
+	}
 	if(fd != part->fd){
 		dup(fd, part->fd);
 		close(fd);
blob - b9e1eb5f4bccb691af505d3a0e9035b6b0d9e451
blob + 73c1d0689f671f7a88c689a73cb04c23b24a396f
--- src/cmd/venti/srv/utils.c
+++ src/cmd/venti/srv/utils.c
@@ -94,9 +94,9 @@ logit(int severity, char *fmt, va_list args)
 		return nil;
 	if(severity != EOk){
 		if(argv0 == nil)
-			fprint(2, "%s: err %d: %s\n", argv0, severity, s);
+			fprint(2, "%T %s: err %d: %s\n", argv0, severity, s);
 		else
-			fprint(2, "err %d: %s\n", severity, s);
+			fprint(2, "%T err %d: %s\n", severity, s);
 	}
 	return s;
 }
blob - e9ca05364653a4486e854bc578ae14b8a0c4494c
blob + af3175a5251b21527c71d9ed41f6028f4e129836
--- src/cmd/venti/srv/venti.c
+++ src/cmd/venti/srv/venti.c
@@ -92,10 +92,10 @@ threadmain(int argc, char *argv[])
 	}
 #endif
 
+	ventifmtinstall();
 	trace(TraceQuiet, "venti started");
-	fprint(2, "venti: ");
+	fprint(2, "%T venti: ");
 
-	ventifmtinstall();
 	if(configfile == nil)
 		configfile = "venti.conf";
 
blob - 2cdb7ba05356c28e70d3c04a0ea5b2e0bac11c5a
blob + eb63d15d731afd5ca4b938d60a2c807c7dd461c6
--- src/cmd/venti/srv/verifyarena.c
+++ src/cmd/venti/srv/verifyarena.c
@@ -59,7 +59,7 @@ verifyarena(char *name, vlong len)
 	u32int bs;
 	u8int score[VtScoreSize];
 
-	fprint(2, "verify %s\n", name);
+	fprint(2, "%T verify %s\n", name);
 
 	memset(&arena, 0, sizeof arena);
 	memset(&s, 0, sizeof s);
@@ -68,20 +68,20 @@ verifyarena(char *name, vlong len)
 	 * read a little bit, which will include the header
 	 */
 	if(readblock(data, HeadSize) < 0){
-		fprint(2, "%s: reading header: %r\n", name);
+		fprint(2, "%T %s: reading header: %r\n", name);
 		return;
 	}
 	sha1(data, HeadSize, nil, &s);
 	if(unpackarenahead(&head, data) < 0){
-		fprint(2, "%s: corrupt arena header: %r\n", name);
+		fprint(2, "%T %s: corrupt arena header: %r\n", name);
 		return;
 	}
 	if(head.version != ArenaVersion4 && head.version != ArenaVersion5)
-		fprint(2, "%s: warning: unknown arena version %d\n", name, head.version);
+		fprint(2, "%T %s: warning: unknown arena version %d\n", name, head.version);
 	if(len != 0 && len != head.size)
-		fprint(2, "%s: warning: unexpected length %lld != %lld\n", name, head.size, len);
+		fprint(2, "%T %s: warning: unexpected length %lld != %lld\n", name, head.size, len);
 	if(strcmp(name, "<stdin>") != 0 && strcmp(head.name, name) != 0)
-		fprint(2, "%s: warning: unexpected name %s\n", name, head.name);
+		fprint(2, "%T %s: warning: unexpected name %s\n", name, head.name);
 
 	/*
 	 * now we know how much to read
@@ -93,7 +93,7 @@ verifyarena(char *name, vlong len)
 		if(n + bs > e)
 			bs = e - n;
 		if(readblock(data, bs) < 0){
-			fprint(2, "%s: read data: %r\n", name);
+			fprint(2, "%T %s: read data: %r\n", name);
 			return;
 		}
 		sha1(data, bs, nil, &s);
@@ -107,7 +107,7 @@ verifyarena(char *name, vlong len)
 	 */
 	bs = head.blocksize;
 	if(readblock(data, bs) < 0){
-		fprint(2, "%s: read last block: %r\n", name);
+		fprint(2, "%T %s: read last block: %r\n", name);
 		return;
 	}
 	sha1(data, bs-VtScoreSize, nil, &s);
@@ -119,18 +119,18 @@ verifyarena(char *name, vlong len)
 	 */
 	arena.blocksize = head.blocksize;
 	if(unpackarena(&arena, data) < 0){
-		fprint(2, "%s: corrupt arena trailer: %r\n", name);
+		fprint(2, "%T %s: corrupt arena trailer: %r\n", name);
 		return;
 	}
 	scorecp(arena.score, &data[arena.blocksize - VtScoreSize]);
 
 	if(namecmp(arena.name, head.name) != 0){
-		fprint(2, "%s: wrong name in trailer: %s vs. %s\n", 
+		fprint(2, "%T %s: wrong name in trailer: %s vs. %s\n", 
 			name, head.name, arena.name);
 		return;
 	}
 	if(arena.version != head.version){
-		fprint(2, "%s: wrong version in trailer: %d vs. %d\n", 
+		fprint(2, "%T %s: wrong version in trailer: %d vs. %d\n", 
 			name, head.version, arena.version);
 		return;
 	}
@@ -140,11 +140,11 @@ verifyarena(char *name, vlong len)
 	 * check for no checksum or the same
 	 */
 	if(scorecmp(score, arena.score) == 0)
-		fprint(2, "%s: verified score\n", name);
+		fprint(2, "%T %s: verified score\n", name);
 	else if(scorecmp(zeroscore, arena.score) == 0)
-		fprint(2, "%s: unsealed\n", name);
+		fprint(2, "%T %s: unsealed\n", name);
 	else{
-		fprint(2, "%s: mismatch checksum - found=%V calculated=%V\n",
+		fprint(2, "%T %s: mismatch checksum - found=%V calculated=%V\n",
 			name, arena.score, score);
 		return;
 	}
@@ -207,7 +207,7 @@ threadmain(int argc, char *argv[])
 		sysfatal("read arena part header: %r");
 	if(unpackarenapart(&ap, data) < 0)
 		sysfatal("corrupted arena part header: %r");
-	fprint(2, "# arena part version=%d blocksize=%d arenabase=%d\n",
+	fprint(2, "%T # arena part version=%d blocksize=%d arenabase=%d\n",
 		ap.version, ap.blocksize, ap.arenabase);
 	ap.tabbase = (PartBlank+HeadSize+ap.blocksize-1)&~(ap.blocksize-1);
 	ap.tabsize = ap.arenabase - ap.tabbase;
@@ -222,21 +222,21 @@ threadmain(int argc, char *argv[])
 		p++;
 	for(i=0; i<nline; i++){
 		if(p == nil){
-			fprint(2, "warning: unexpected arena table end\n");
+			fprint(2, "%T warning: unexpected arena table end\n");
 			break;
 		}
 		q = strchr(p, '\n');
 		if(q)
 			*q++ = 0;
 		if(strlen(p) >= sizeof line){
-			fprint(2, "warning: long arena table line: %s\n", p);
+			fprint(2, "%T warning: long arena table line: %s\n", p);
 			p = q;
 			continue;
 		}
 		strcpy(line, p);
 		memset(f, 0, sizeof f);
 		if(tokenize(line, f, nelem(f)) < 3){
-			fprint(2, "warning: bad arena table line: %s\n", p);
+			fprint(2, "%T warning: bad arena table line: %s\n", p);
 			p = q;
 			continue;
 		}
@@ -245,17 +245,17 @@ threadmain(int argc, char *argv[])
 			start = strtoull(f[1], 0, 0);
 			stop = strtoull(f[2], 0, 0);
 			if(stop <= start){
-				fprint(2, "%s: bad start,stop %lld,%lld\n", f[0], stop, start);
+				fprint(2, "%T %s: bad start,stop %lld,%lld\n", f[0], stop, start);
 				continue;
 			}
 			if(seek(fd, start, 0) < 0)
-				fprint(2, "%s: seek to start: %r\n", f[0]);
+				fprint(2, "%T %s: seek to start: %r\n", f[0]);
 			verifyarena(f[0], stop - start);
 		}
 	}
 	for(i=1; i<argc; i++)
 		if(argv[i] != 0)
-			fprint(2, "%s: did not find arena\n", argv[i]);
+			fprint(2, "%T %s: did not find arena\n", argv[i]);
 
 	threadexitsall(nil);
 }