1996/0607/port/devsd.c (diff list | history)

1996/0315/sys/src/9/port/devsd.c:47,52 – 1996/0607/sys/src/9/port/devsd.c:47,54 (short | long | prev | next)
1994/0913		char vol[NAMELEN]; uchar* inquire;
1996/0607		int partok; ulong version;
1994/0913		ulong size; ulong bsize;
1996/0315/sys/src/9/port/devsd.c:57,63 – 1996/0607/sys/src/9/port/devsd.c:59,65
1994/0913		int ndisk; Disk disk[Ndisk]; static void sdrdpart(Disk*);
1996/0607		static int sdrdpart(Disk*);
1994/0913		static long sdio(Chan*, int, char*, ulong, ulong);
1995/0722		static int types[] =
1996/0315/sys/src/9/port/devsd.c:137,145 – 1996/0607/sys/src/9/port/devsd.c:139,144
1995/0405		* their act together after a reset. * If 'not ready' comes back, try starting a TypeDA and punt * the get capacity until the drive is attached. * It might be possible to be smarter here, and look at the * response from a test-unit-ready which would show if the * target was in the process of becoming ready. */ if(scsicap(d->t, d->lun, &d->size, &d->bsize) != STok) { nbytes = sizeof(scratch);
1996/0315/sys/src/9/port/devsd.c:187,194 – 1996/0607/sys/src/9/port/devsd.c:186,197
1994/0913		{
1995/0417		int i;
1994/0913
1995/0417		for(i = 0; i < ndisk; i++) sdrdpart(&disk[i]);
1996/0607		for(i = 0; i < ndisk; i++){ qlock(&disk[i]); if(disk[i].partok == 0) sdrdpart(&disk[i]); qunlock(&disk[i]); }
1995/0417
1994/0913		return devattach('w', spec); }
1996/0315/sys/src/9/port/devsd.c:246,253 – 1996/0607/sys/src/9/port/devsd.c:249,260
1994/0913		d = &disk[DRIVE(c->qid)]; p = &d->table[PART(c->qid)];
1995/0325		if((c->mode&3) != OREAD && strcmp(p->name, "partition") == 0)
1996/0607		if((c->mode&3) != OREAD && strcmp(p->name, "partition") == 0){ qlock(d); d->partok = 0;
1995/0325		sdrdpart(d);
1996/0607		qunlock(d); }
1994/0913		} long
1996/0315/sys/src/9/port/devsd.c:268,273 – 1996/0607/sys/src/9/port/devsd.c:275,286
1994/0913		long sdwrite(Chan *c, char *a, long n, ulong offset) {
1996/0607		Disk *d; d = &disk[DRIVE(c->qid)]; if((d->inquire[0] & 0x1F) == TypeCD) error(Eperm);
1994/0913		return sdio(c, 1, a, n, offset);
1995/0108		}
1996/0315/sys/src/9/port/devsd.c:277,283 – 1996/0607/sys/src/9/port/devsd.c:290,296
1995/0108		return devbwrite(c, bp, offset);
1994/0913		} static void
1996/0607		static int
1994/0913		sdrdpart(Disk *d) { Part *p;
1996/0315/sys/src/9/port/devsd.c:285,314 – 1996/0607/sys/src/9/port/devsd.c:298,333
1994/0913		char *b, *line[Npart+2], *field[3]; static char MAGIC[] = "plan9 partitions";
1996/0607		if(d->partok) return STok; p = d->table; strcpy(p->name, "disk"); p->beg = 0; p->end = 0; d->npart = 1;
1995/0417		/* * If the drive wasn't ready when we tried to do a * read-capacity earlier (in sdinit()), try again. * It might be possible to be smarter here, and look at the * response from a test-unit-ready which would show if the * target was in the process of becoming ready.
1996/0607		* If the drive wasn't ready when a read-capacity was tried * earlier (in sdinit()), try again.
1995/0417		*/ if(d->size == 0 || d->bsize == 0){ if(scsicap(d->t, d->lun, &d->size, &d->bsize) != STok){
1996/0607		n = scsicap(d->t, d->lun, &d->size, &d->bsize); if(n != STok){
1995/0417		d->size = d->bsize = 0; error(Eio);
1996/0607		return scsierrstr(n);
1995/0417		} }
1996/0607		p->end = d->size + 1; if((d->inquire[0] & 0x1F) == TypeCD) return STok;
1994/0913		b = scsialloc(d->bsize); if(b == 0) error(Enomem); qlock(d);                  p = d->table;
1996/0607		return scsierrstr(STnomem);
1994/0913		strcpy(p->name, "disk"); p->beg = 0; p->end = d->size + 1; p++; strcpy(p->name, "partition"); p->beg = d->table[0].end - 1;
1996/0315/sys/src/9/port/devsd.c:316,327 – 1996/0607/sys/src/9/port/devsd.c:335,340
1994/0913		p++; d->npart = 2;
1995/0403		if((d->inquire[0] & 0x1F) == TypeCD){ scsifree(b); qunlock(d); return; }
1994/0913		scsibio(d->t, d->lun, SCSIread, b, 1, d->bsize, d->table[0].end-1); b[d->bsize-1] = '\0';
1996/0315/sys/src/9/port/devsd.c:331,356 – 1996/0607/sys/src/9/port/devsd.c:344,367
1996/0315		n = parsefields(b, line, Npart+2, "\n");
1994/0913		if(n > 0 && strncmp(line[0], MAGIC, sizeof(MAGIC)-1) == 0) { for(i = 1; i < n; i++) {
1996/0315		switch(parsefields(line[i], field, 3, " ")) {
1994/0913		case 2: if(strcmp(field[0], "unit") == 0) strncpy(d->vol, field[1], NAMELEN); break; case 3:
1994/1228		if(p >= &d->table[Npart]) break;
1994/0913		strncpy(p->name, field[0], NAMELEN); p->beg = strtoul(field[1], 0, 0); p->end = strtoul(field[2], 0, 0); if(p->beg > p->end || p->beg >= d->table[0].end) break; p++; }
1996/0607		if(parsefields(line[i], field, 3, " ") != 3) break; if(p >= &d->table[Npart]) break; strncpy(p->name, field[0], NAMELEN); p->beg = strtoul(field[1], 0, 0); p->end = strtoul(field[2], 0, 0); if(p->beg > p->end || p->beg >= d->table[0].end) break; p++;
1994/0913		} } d->npart = p - d->table; scsifree(b); qunlock(d);
1996/0607		d->partok = 1; return STok;
1994/0913		} static long
1996/0315/sys/src/9/port/devsd.c:364,372 – 1996/0607/sys/src/9/port/devsd.c:375,380
1994/0913		d = &disk[DRIVE(c->qid)]; p = &d->table[PART(c->qid)];
1995/0403		if(write && (d->inquire[0] & 0x1F) == TypeCD) error(Eperm);
1994/0913		block = (offset / d->bsize) + p->beg; n = (offset + len + d->bsize - 1) / d->bsize + p->beg - block; max = SCSImaxxfer / d->bsize;
1996/0315/sys/src/9/port/devsd.c:379,393 – 1996/0607/sys/src/9/port/devsd.c:387,402
1994/0913		b = scsialloc(n*d->bsize); if(b == 0) error(Enomem); if(waserror()) { scsifree(b); nexterror(); }
1996/0607		return scsierrstr(STnomem);
1994/0913		offset %= d->bsize; if(write) { if(offset || len % d->bsize) { x = scsibio(d->t, d->lun, SCSIread, b, n, d->bsize, block);
1996/0607		if(x < 0){ len = -1; goto buggery; }
1994/0913		if(x < n * d->bsize) { n = x / d->bsize; x = n * d->bsize - offset;
1996/0315/sys/src/9/port/devsd.c:397,402 – 1996/0607/sys/src/9/port/devsd.c:406,415
1994/0913		} memmove(b + offset, a, len); x = scsibio(d->t, d->lun, SCSIwrite, b, n, d->bsize, block);
1996/0607		if(x < 0){ len = -1; goto buggery; }
1994/0913		if(x < offset) len = 0; else
1996/0315/sys/src/9/port/devsd.c:405,410 – 1996/0607/sys/src/9/port/devsd.c:418,427
1994/0913		} else { x = scsibio(d->t, d->lun, SCSIread, b, n, d->bsize, block);
1996/0607		if(x < 0){ len = -1; goto buggery; }
1994/0913		if(x < offset) len = 0; else
1996/0315/sys/src/9/port/devsd.c:412,418 – 1996/0607/sys/src/9/port/devsd.c:429,436
1994/0913		len = x - offset; memmove(a, b+offset, len); } poperror();
1996/0607		buggery:
1994/0913		scsifree(b); return len; }