Date: Sun, 10 Jan 2010 06:06:57 -0800 (PST) From: "Pedro F. Giffuni" <giffunip@tutopia.com> To: FreeBSD-gnats-submit@FreeBSD.org, freebsd-bugs@FreeBSD.org Subject: Re: bin/142526: Cleanups and updates to newfs_msdos Message-ID: <346723.73967.qm@web113505.mail.gq1.yahoo.com>
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[-- Attachment #1 --]
Update:
Some people (hi Bruce!) have used non-standard bytes/sector successfully
in the past so permit formatting of non-standard blocksizes but warn
about it.
[-- Attachment #2 --]
diff -ru newfs_msdos.orig/newfs_msdos.8 newfs_msdos/newfs_msdos.8
--- newfs_msdos.orig/newfs_msdos.8 2010-01-06 11:06:02.000000000 +0000
+++ newfs_msdos/newfs_msdos.8 2010-01-09 10:25:12.000000000 +0000
@@ -116,7 +116,7 @@
.It Fl S Ar sector-size
Number of bytes per sector.
Acceptable values are powers of 2
-in the range 128 through 32768.
+in the range 512 through 4096.
.It Fl a Ar FAT-size
Number of sectors per FAT.
.It Fl b Ar block-size
diff -ru newfs_msdos.orig/newfs_msdos.c newfs_msdos/newfs_msdos.c
--- newfs_msdos.orig/newfs_msdos.c 2010-01-06 11:06:02.000000000 +0000
+++ newfs_msdos/newfs_msdos.c 2010-01-10 08:54:15.000000000 +0000
@@ -55,6 +55,7 @@
#define NPB 2 /* nibbles per byte */
#define DOSMAGIC 0xaa55 /* DOS magic number */
+#define MAXBPS 4096 /* maximum bytes per sector */
#define MINBPS 512 /* minimum bytes per sector */
#define MAXSPC 128 /* maximum sectors per cluster */
#define MAXNFT 16 /* maximum number of FATs */
@@ -165,20 +166,23 @@
#define BPBGAP 0, 0, 0, 0, 0, 0
+#define INIT(a, b, c, d, e, f, g, h, i, j) \
+ { .bps = a, .spc = b, .res = c, .nft = d, .rde = e, \
+ .sec = f, .mid = g, .spf = h, .spt = i, .hds = j, }
static struct {
const char *name;
struct bpb bpb;
} const stdfmt[] = {
- {"160", {512, 1, 1, 2, 64, 320, 0xfe, 1, 8, 1, BPBGAP}},
- {"180", {512, 1, 1, 2, 64, 360, 0xfc, 2, 9, 1, BPBGAP}},
- {"320", {512, 2, 1, 2, 112, 640, 0xff, 1, 8, 2, BPBGAP}},
- {"360", {512, 2, 1, 2, 112, 720, 0xfd, 2, 9, 2, BPBGAP}},
- {"640", {512, 2, 1, 2, 112, 1280, 0xfb, 2, 8, 2, BPBGAP}},
- {"720", {512, 2, 1, 2, 112, 1440, 0xf9, 3, 9, 2, BPBGAP}},
- {"1200", {512, 1, 1, 2, 224, 2400, 0xf9, 7, 15, 2, BPBGAP}},
- {"1232", {1024,1, 1, 2, 192, 1232, 0xfe, 2, 8, 2, BPBGAP}},
- {"1440", {512, 1, 1, 2, 224, 2880, 0xf0, 9, 18, 2, BPBGAP}},
- {"2880", {512, 2, 1, 2, 240, 5760, 0xf0, 9, 36, 2, BPBGAP}}
+ {"160", INIT(512, 1, 1, 2, 64, 320, 0xfe, 1, 8, 1)},
+ {"180", INIT(512, 1, 1, 2, 64, 360, 0xfc, 2, 9, 1)},
+ {"320", INIT(512, 2, 1, 2, 112, 640, 0xff, 1, 8, 2)},
+ {"360", INIT(512, 2, 1, 2, 112, 720, 0xfd, 2, 9, 2)},
+ {"640", INIT(512, 2, 1, 2, 112, 1280, 0xfb, 2, 8, 2)},
+ {"720", INIT(512, 2, 1, 2, 112, 1440, 0xf9, 3, 9, 2)},
+ {"1200", INIT(512, 1, 1, 2, 224, 2400, 0xf9, 7, 15, 2)},
+ {"1232", INIT(1024,1, 1, 2, 192, 1232, 0xfe, 2, 8, 2)},
+ {"1440", INIT(512, 1, 1, 2, 224, 2880, 0xf0, 9, 18, 2)},
+ {"2880", INIT(512, 2, 1, 2, 240, 5760, 0xf0, 9, 36, 2)}
};
static const u_int8_t bootcode[] = {
@@ -421,7 +425,9 @@
}
if (!powerof2(bpb.bps))
errx(1, "bytes/sector (%u) is not a power of 2", bpb.bps);
- if (bpb.bps < MINBPS)
+ if (bpb.bps > MAXBPS)
+ printf( "WARNING: bytes/sector (%u) is too big", bpb.bps);
+ else if (bpb.bps < MINBPS)
errx(1, "bytes/sector (%u) is too small; minimum is %u",
bpb.bps, MINBPS);
if (!(fat = opt_F)) {
@@ -533,7 +539,7 @@
if (!bpb.res)
bpb.res = fat == 32 ? MAX(x, MAX(16384 / bpb.bps, 4)) : x;
else if (bpb.res < x)
- errx(1, "too few reserved sectors");
+ errx(1, "too few reserved sectors (need %d have %d)", x, bpb.res);
if (fat != 32 && !bpb.rde)
bpb.rde = DEFRDE;
rds = howmany(bpb.rde, bpb.bps / sizeof(struct de));
@@ -657,8 +663,8 @@
((u_int)tm->tm_hour << 8 |
(u_int)tm->tm_min));
mk4(bsx->volid, x);
- mklabel(bsx->label, opt_L ? opt_L : "NO NAME");
- sprintf(buf, "FAT%u", fat);
+ mklabel(bsx->label, opt_L ? opt_L : "NO_NAME");
+ snprintf(buf, sizeof(buf), "FAT%u", fat);
setstr(bsx->type, buf, sizeof(bsx->type));
if (!opt_B) {
x1 += sizeof(struct bsx);
@@ -666,7 +672,7 @@
mk1(bs->jmp[0], 0xeb);
mk1(bs->jmp[1], x1 - 2);
mk1(bs->jmp[2], 0x90);
- setstr(bs->oem, opt_O ? opt_O : "BSD 4.4",
+ setstr(bs->oem, opt_O ? opt_O : "BSD4.4 ",
sizeof(bs->oem));
memcpy(img + x1, bootcode, sizeof(bootcode));
mk2(img + MINBPS - 2, DOSMAGIC);
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