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1.1 root 1: #ifndef lint
2: static char sccsid[] = "@(#)disklabel.c 1.2 (Berkeley/CCI) 6/7/88";
3: #endif
4:
5: #include "vdfmt.h"
6: #include "cmd.h"
7:
8: int lab_help();
9:
10: /*
11: **
12: */
13:
14: get_drive_type(ctlr, drive, op_mask)
15: int ctlr, drive, op_mask;
16: {
17: int tokens[20];
18: char line[132];
19: int savedevflags = 0;
20: register struct disklabel *lp;
21: struct disklabel *plp, *getdiskbyname(), *promptfordisk(), *findproto();
22:
23: lp = lab;
24: if (lp->d_typename[0] == 0) {
25: print("Read label from drive %d, controller %d? ", drive, ctlr);
26: get_string_cmd(line, lab_help);
27: if (kill_processes == true)
28: return;
29: if (line[0] == 'y' || line[0] == 'Y') {
30: lp->d_secsize = 512;
31: lp->d_nsectors = 66;
32: lp->d_ntracks = 23;
33: lp->d_ncylinders = 850;
34: lp->d_secpercyl = 66*23;
35: if (D_INFO->alive != u_true)
36: spin_up_drive();
37: savedevflags = lab->d_devflags;
38: if (readlabel()) {
39: lp->d_devflags = savedevflags;
40: lp->d_pat = 0; /* this can't be what we want */
41: goto check;
42: }
43: lab->d_devflags = savedevflags;
44: lp->d_typename[0] = 0;
45: }
46: }
47: for (;;) {
48: print("Drive type for controller %d, drive %d? ", ctlr, drive);
49: if (lp->d_typename[0] != 0)
50: printf("(%s) ", lp->d_typename);
51: get_string_cmd(line, lab_help);
52: if (kill_processes == true)
53: return;
54: if (lp->d_typename[0] != 0 &&
55: (line[0] == 0 || strcmp(lp->d_typename, line) == 0))
56: break;
57: if (lp = findproto(line))
58: break;;
59: if (lp = getdiskbyname(line))
60: break;
61: if (lp = promptfordisk(line))
62: break;
63: if (kill_processes == true)
64: return;
65: lp = lab;
66: }
67: check:
68: plp = findproto(lp->d_typename);
69: while (op_mask & FORMAT_OP && lp->d_traksize == 0) {
70: print("number of bytes per track");
71: if (plp && plp->d_traksize)
72: printf(" (%d)", plp->d_traksize);
73: printf(": ");
74: get_string_cmd(line, lab_help);
75: if (kill_processes == true)
76: return;
77: if (line[0] == 0) {
78: if (plp->d_traksize == 0)
79: print("no default value\n");
80: lp->d_traksize = plp->d_traksize;
81: } else
82: lp->d_traksize = atol(line);
83: }
84: print("Drive geometry for controller %d, drive %d (%s):\n",
85: ctlr, drive, lp->d_typename);
86: print(" sector size %d; %d sectors, %d tracks, %d cylinders\n",
87: lp->d_secsize, lp->d_nsectors, lp->d_ntracks, lp->d_ncylinders);
88: if (lp->d_pat == 0 && op_mask & (FORMAT_OP | VERIFY_OP)) {
89: extern struct flawpat defpats, cdcpats;
90:
91: print("media patterns for verify (default or cdc): ");
92: get_string_cmd(line, lab_help);
93: if (kill_processes == true)
94: return;
95: if (strcmp(line, "cdc") == 0)
96: lp->d_pat = (long) &cdcpats;
97: else
98: lp->d_pat = (long) &defpats;
99: }
100: if (lab->d_cylskew == -1)
101: lab->d_cylskew = 0;
102: if (lab->d_trackskew == -1)
103: lab->d_trackskew = 0;
104: if (lab->d_sparespertrack == -1)
105: lab->d_sparespertrack = 0;
106: if (lp != lab) {
107: *lab = *lp;
108: if (savedevflags)
109: lab->d_devflags = savedevflags;
110: }
111: configure_drive(1); /* set new parameters */
112: }
113:
114: struct disklabel *
115: findproto(name)
116: char *name;
117: {
118: int count;
119:
120: if (C_INFO->type == VDTYPE_VDDC)
121: count = smddrives;
122: else
123: count = 0;
124: for (; count < ndrives; count++)
125: if (strcmp(vdproto[count].d_typename, name) == 0)
126: return (&vdproto[count]);
127: return ((struct disklabel *) 0);
128: }
129:
130: struct disklabel disk;
131:
132: struct field {
133: char *f_name;
134: char *f_defaults;
135: u_long *f_location;
136: } fields[] = {
137: { "sector size", "512", &disk.d_secsize },
138: { "#sectors/track", 0, &disk.d_nsectors },
139: { "#tracks/cylinder", 0, &disk.d_ntracks },
140: { "#cylinders", 0, &disk.d_ncylinders },
141: { "#bytes/track", 0, &disk.d_traksize },
142: { 0, 0, 0 },
143: };
144:
145: struct disklabel *
146: promptfordisk(name)
147: char *name;
148: {
149: register struct disklabel *dp = &disk;
150: register struct field *fp;
151: register i;
152: char buf[132], *cp;
153:
154: print("%s: unknown drive type\n", name);
155: if (get_yes_no("Enter drive parameters") == false)
156: return ((struct disklabel *)0);
157:
158: strncpy(dp->d_typename, name, sizeof(dp->d_typename));
159: dp->d_type = DTYPE_SMD;
160: dp->d_flags = 0;
161:
162: print("(type <cr> to get default value, if only one)\n");
163: for (fp = fields; fp->f_name != NULL; fp++) {
164: again:
165: print("%s ", fp->f_name);
166: if (fp->f_defaults != NULL)
167: printf("(%s)", fp->f_defaults);
168: printf("? ");
169: get_string_cmd(buf, lab_help);
170: if (kill_processes == true)
171: return ((struct disklabel *)0);
172: cp = buf;
173: if (*cp == '\0') {
174: if (fp->f_defaults == NULL) {
175: print("no default value\n");
176: goto again;
177: }
178: cp = fp->f_defaults;
179: }
180: *fp->f_location = atol(cp);
181: if (*fp->f_location == 0) {
182: print("%s: bad value\n", cp);
183: goto again;
184: }
185: }
186: print("sectors/cylinder (%d)? ", dp->d_nsectors * dp->d_ntracks);
187: get_string_cmd(buf, lab_help);
188: if (kill_processes == true)
189: return ((struct disklabel *)0);
190: if (buf[0] == 0)
191: dp->d_secpercyl = dp->d_nsectors * dp->d_ntracks;
192: else
193: dp->d_secpercyl = atol(buf);
194: return (dp);
195: }
196:
197: lab_help()
198: {
199: indent();
200: print("Entering drive type and parameters:\n");
201: indent();
202: print("Answer each question with a number or name, as appropriate.\n");
203: print("Questions with defaults show them in (parentheses);\n");
204: print("press return to accept the default.\n\n");
205: exdent(1);
206: print("Other commands available:\n");
207: indent();
208: print("QUIT - abort current operation\n");
209: exdent(2);
210: }
211:
212: static char labelsector[VD_MAXSECSIZE];
213: /*
214: * Fetch disklabel for disk.
215: */
216: readlabel()
217: {
218: register struct disklabel *lp;
219:
220: bzero(labelsector, sizeof(labelsector));
221: if (vread(LABELSECTOR, labelsector, 1) < 1)
222: return (0);
223: for (lp = (struct disklabel *)labelsector;
224: lp <= (struct disklabel *)(labelsector+VD_MAXSECSIZE - sizeof(*lp));
225: lp = (struct disklabel *)((char *)lp + 16))
226: if (lp->d_magic == DISKMAGIC &&
227: lp->d_magic2 == DISKMAGIC)
228: break;
229: if (lp > (struct disklabel *)(labelsector+VD_MAXSECSIZE-sizeof(*lp)) ||
230: lp->d_magic != DISKMAGIC || lp->d_magic2 != DISKMAGIC ||
231: dkcksum(lp) != 0) {
232: print("Disk is unlabeled.\n");
233: return (0);
234: }
235: *lab = *lp;
236: return (1);
237: }
238:
239: writelabel()
240: {
241: register struct disklabel *lp = lab;
242:
243: lp->d_magic = DISKMAGIC;
244: lp->d_magic2 = DISKMAGIC;
245: lp->d_checksum = 0;
246: lp->d_checksum = dkcksum(lp);
247: if (vwrite(LABELSECTOR, labelsector, 1) != 1)
248: printf("error writing disk label\n");
249: }
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