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Initial root filesystem is now on a ramdisk that is part of the image.

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This commit is contained in:
Philip Homburg 2006-02-15 11:18:21 +00:00
parent 3a05de3763
commit c3a88d15d8
26 changed files with 894 additions and 45 deletions
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1
commands/scripts/binsizes.sh
View file

@ -17,3 +17,4 @@ then cat "$t" | while read line
do awk '{ print "chmem =" $2 " " $1 " >/dev/null 2>&1 "}'
done | /bin/sh
fi
exit 0

27
commands/simple/Makefile
View file

@ -51,6 +51,7 @@ ALL = \
calendar \
cat \
cdiff \
cdprobe \
cgrep \
chmem \
chmod \
@ -110,6 +111,7 @@ ALL = \
last \
leave \
life \
loadramdisk \
login \
look \
lp \
@ -128,6 +130,7 @@ ALL = \
mount \
mt \
nm \
newroot \
nonamed \
nice \
od \
@ -255,6 +258,10 @@ cdiff: cdiff.c
$(CCLD) -o $@ $?
@install -S 28kw $@
cdprobe: cdprobe.c
$(CCLD) -o $@ $?
@install -S 28kw $@
cgrep: cgrep.c
$(CCLD) -o $@ $?
@install -S 5kw $@
@ -491,6 +498,10 @@ life: life.c
$(CCLD) -o $@ $? -lcurses
@install -S 15kw $@
loadramdisk: loadramdisk.c
$(CCLD) -o $@ $?
install -S 4kw $@
login: login.c
$(CCLD) -o $@ $?
install -S 4kw $@
@ -559,6 +570,10 @@ mt: mt.c
$(CCLD) -o $@ $?
@install -S 4kw $@
newroot: newroot.c
$(CCLD) -o $@ $?
@install -S 32kw $@
nm: nm.c
$(CCLD) -o $@ $?
@install -S 32kw $@
@ -892,6 +907,7 @@ install: \
/usr/bin/calendar \
/usr/bin/cat \
/usr/bin/cdiff \
/usr/bin/cdprobe \
/usr/bin/cgrep \
/usr/bin/chmem \
/usr/bin/chmod \
@ -970,6 +986,7 @@ install: \
/usr/bin/uptime \
/usr/bin/leave \
/usr/bin/life \
/usr/bin/loadramdisk \
/usr/bin/login \
/usr/bin/look \
/usr/bin/lp \
@ -987,6 +1004,7 @@ install: \
/usr/bin/modem \
/usr/bin/mount \
/usr/bin/mt \
/usr/bin/newroot \
/usr/bin/nm \
/usr/bin/nice \
/usr/bin/nonamed \
@ -1126,6 +1144,9 @@ install: \
/usr/bin/cdiff: cdiff
install -cs -o bin $? $@
/usr/bin/cdprobe: cdprobe
install -cs -o bin $? $@
/usr/bin/cgrep: cgrep
install -cs -o bin $? $@
@ -1334,6 +1355,9 @@ install: \
/usr/bin/life: life
install -cs -o bin $? $@
/usr/bin/loadramdisk: loadramdisk
install -cs -o bin $? $@
/usr/bin/login: login
install -cs -o bin $? $@
@ -1385,6 +1409,9 @@ install: \
/usr/bin/mt: mt
install -cs -o bin $? $@
/usr/bin/newroot: newroot
install -cs -o bin $? $@
/usr/bin/nm: nm
install -cs -o bin $? $@

130
commands/simple/cdprobe.c Normal file
View file

@ -0,0 +1,130 @@
/* This file contains some code to guess where we have to load the
* RAM image device from, if started from CD. (In this case it's hard
* to tell where this is without diving into BIOS heuristics.)
*
* There is some nasty hard-codery in here ( MINIX cd label) that can be
* improved on.
*
* Changes:
* Jul 14, 2005 Created (Ben Gras)
* Feb 10, 2006 Changed into a standalone program (Philip Homburg)
*/
#define CD_SECTOR 2048
#define SUPER_OFF 1024
#define AT_MINORS 4
#define MAGIC_OFF 24
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "../../servers/fs/const.h"
char pvd[CD_SECTOR];
/*===========================================================================*
* cdprobe *
*===========================================================================*/
int main(void)
{
int i, r, fd, minor, found;
off_t pos;
u16_t *magicp;
char name1[]= "/dev/c0dX";
char name2[]= "/dev/c0dXpY";
found= 0;
for(i = 0; i < AT_MINORS; i++) {
name1[8]= '0' + i;
fd = open(name1, O_RDONLY);
if (fd < 0)
{
if (errno != ENXIO)
{
fprintf(stderr, "open '%s' failed: %s\n",
name1, strerror(errno));
}
continue;
}
pos= lseek(fd, 16*CD_SECTOR, SEEK_SET);
if (pos != 16*CD_SECTOR)
{
/* Strange, do we need to issue a warning? */
close(fd);
continue;
}
r = read(fd, pvd, sizeof(pvd));
if (r != sizeof(pvd))
{
fprintf(stderr,
"error reading CD label from '%s': %s\n",
name1, strerror(errno));
close(fd);
continue;
}
close(fd);
/* Check PVD ID. */
if (pvd[0] != 1 || pvd[1] != 'C' || pvd[2] != 'D' ||
pvd[3] != '0' || pvd[4] != '0' || pvd[5] != '1' ||
pvd[6] != 1 ||
strncmp(pvd + 40, "MINIX", 5) != 0) {
continue;
}
/* 3. Both c0dXp1 and p2 should have a superblock. */
found= 1; /* Assume everything is okay */
for (minor = 1; minor <= 2; minor++) {
name2[8]= '0' + i;
name2[10]= '0' + minor;
fd = open(name2, O_RDONLY);
if (fd < 0)
{
if (errno != ENXIO)
{
fprintf(stderr,
"open '%s' failed: %s\n",
name2, strerror(errno));
}
found= 0;
break;
}
r = read(fd, pvd, sizeof(pvd));
if (r != sizeof(pvd))
{
fprintf(stderr,
"error reading super block from '%s': %s\n",
name2, strerror(errno));
close(fd);
found= 0;
break;
}
close(fd);
magicp= (u16_t *)&pvd[SUPER_OFF+MAGIC_OFF];
if (*magicp != SUPER_V3)
{
fprintf(stderr, "bad super block on %s\n",
name2);
found= 0;
break;
}
}
if (found)
{
printf("%s\n", name1);
exit(0);
}
}
return 1;
}

126
commands/simple/loadramdisk.c Normal file
View file

@ -0,0 +1,126 @@
/*
loadramdisk.c
Copy a device or file specified as argument to /dev/ram
*/
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/ioctl.h>
#define RAM "/dev/ram"
char buf[10240];
static unsigned long size_device(int fd);
int main(int argc, char *argv[])
{
unsigned long off, size;
int r, s, fd, ramfd;
char *src;
if (argc != 2)
{
fprintf(stderr, "Usage: loadramdisk <file>\n");
exit(1);
}
src= argv[1];
fd= open(src, O_RDONLY);
if (fd < 0)
{
fprintf(stderr, "Unable to open '%s': %s\n",
src, strerror(errno));
exit(1);
}
/* Get the size of the device */
errno= 0;
size= size_device(fd);
if (errno != 0)
{
fprintf(stderr, "Lseek(end) failed on '%s': %s\n",
src, strerror(errno));
exit(1);
}
if (lseek(fd, 0, SEEK_SET) != 0)
{
fprintf(stderr, "Lseek(0) failed on '%s': %s\n",
src, strerror(errno));
exit(1);
}
ramfd= open(RAM, O_RDWR);
if (ramfd < 0)
{
fprintf(stderr, "Unable to open '%s': %s\n",
RAM, strerror(errno));
exit(1);
}
r= ioctl(ramfd, MIOCRAMSIZE, &size);
if (r != 0)
{
fprintf(stderr, "MIOCRAMSIZE %lu failed on '%s': %s\n",
size, RAM, strerror(errno));
exit(1);
}
off= 0;
while (off < size)
{
r= read(fd, buf, sizeof(buf));
if (r <= 0)
{
fprintf(stderr, "error reading '%s': %s\n",
src, r == 0 ? "unexpected EOF" :
strerror(errno));
exit(1);
}
s= write(ramfd, buf, r);
if (s != r)
{
fprintf(stderr, "error writing to '%s': %s\n",
s >= 0 ? "short write" : strerror(errno));
exit(1);
}
off += r;
}
exit(0);
}
static unsigned long size_device(int fd)
{
char b;
int r;
unsigned long low, mid, high;
/* Try to find the size of a device using binary search */
low= 0;
high= -1;
while (mid= low+(high-low)/2, mid > low)
{
if (lseek(fd, mid, SEEK_SET) != mid)
{
fprintf(stderr, "lseek to %lu failed: %s\n",
mid, strerror(errno));
exit(1);
}
r= read(fd, &b, 1);
if (r < 0)
{
fprintf(stderr, "read failed at position %lu: %s\n",
mid, strerror(errno));
exit(1);
}
if (r > 0)
low= mid;
else
high= mid;
}
return high;
}

21
commands/simple/mkfs.c
View file

@ -423,7 +423,8 @@ char *device;
struct stat st;
if ((fd = open(device, O_RDONLY)) == -1) {
perror("sizeup open");
if (errno != ENOENT)
perror("sizeup open");
return 0;
}
if (ioctl(fd, DIOCGETP, &entry) == -1) {
@ -1062,9 +1063,25 @@ char *devname; /* /dev/hd1 or whatever */
{
/* Check to see if the special file named in s is mounted. */
int n;
int n, r;
struct stat sb;
char special[PATH_MAX + 1], mounted_on[PATH_MAX + 1], version[10], rw_flag[10];
r= stat(devname, &sb);
if (r == -1)
{
if (errno == ENOENT)
return; /* Does not exist, and therefore not mounted. */
fprintf(stderr, "%s: stat %s failed: %s\n",
progname, devname, strerror(errno));
exit(1);
}
if (!S_ISBLK(sb.st_mode))
{
/* Not a block device and therefore not mounted. */
return;
}
if (load_mtab("mkfs") < 0) return;
while (1) {
n = get_mtab_entry(special, mounted_on, version, rw_flag);

31
commands/simple/newroot.c Normal file
View file

@ -0,0 +1,31 @@
/*
newroot.c
Replace the current root with a new one
*/
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
int main(int argc, char *argv[])
{
int r;
char *dev;
if (argc != 2)
{
fprintf(stderr, "Usage: newroot <block-special>\n");
exit(1);
}
dev= argv[1];
r= mount(dev, "/", 0 /* !ro */);
if (r != 0)
{
fprintf(stderr, "newroot: mount failed: %s\n", strerror(errno));
exit(1);
}
return 0;
}

2
drivers/bios_wini/Makefile
View file

@ -24,7 +24,7 @@ LIBDRIVER = $d/libdriver/driver.o $d/libdriver/drvlib.o
all build: $(DRIVER)
$(DRIVER): $(OBJ) $(LIBDRIVER)
$(CC) -o $@ $(LDFLAGS) $(OBJ) $(LIBDRIVER) $(LIBS)
install -S 256w $(DRIVER)
install -S 4k $(DRIVER)
$(LIBDRIVER):
cd $d/libdriver && $(MAKE)

14
drivers/memory/Makefile
View file

@ -16,29 +16,35 @@ CFLAGS = -I$i
LDFLAGS = -i
LIBS = -lsys -lsysutil
OBJ = memory.o
OBJ = memory.o imgrd.o
LIBDRIVER = $d/libdriver/driver.o
# build local binary
all build: $(DRIVER)
$(DRIVER): $(OBJ) $(LIBDRIVER)
$(DRIVER): ramdisk_image $(OBJ) $(LIBDRIVER)
$(CC) -o $@ $(LDFLAGS) $(OBJ) $(LIBDRIVER) $(LIBS)
install -S 1024w $(DRIVER)
imgrd.o: ramdisk/image.c
$(LIBDRIVER):
cd $d/libdriver && $(MAKE)
ramdisk_image:
cd ramdisk && make
binsizes big
# install with other drivers
install: /sbin/$(DRIVER)
install: # /sbin/$(DRIVER)
/sbin/$(DRIVER): $(DRIVER)
install -o root -cs $? $@
# clean up local files
clean:
rm -f $(DRIVER) *.o *.bak
cd ramdisk && make clean
depend:
/usr/bin/mkdep "$(CC) -E $(CPPFLAGS)" *.c ../libdriver/*.c > .depend

14
drivers/memory/imgrd.c Normal file
View file

@ -0,0 +1,14 @@
/*
Ramdisk that is part of the image
*/
#include <stddef.h>
#include "local.h"
unsigned char imgrd[]=
{
#include "ramdisk/image.c"
};
size_t imgrd_size= sizeof(imgrd);

6
drivers/memory/local.h Normal file
View file

@ -0,0 +1,6 @@
/*
local defines and declarations
*/
extern unsigned char imgrd[];
extern size_t imgrd_size;

44
drivers/memory/memory.c
View file

@ -25,7 +25,9 @@
#include "assert.h"
#define NR_DEVS 6 /* number of minor devices */
#include "local.h"
#define NR_DEVS 7 /* number of minor devices */
PRIVATE struct device m_geom[NR_DEVS]; /* base and size of each device */
PRIVATE int m_seg[NR_DEVS]; /* segment index of each device */
@ -191,6 +193,19 @@ unsigned nr_req; /* length of request vector */
}
break;
case IMGRD_DEV:
if (position >= dv_size) return(OK); /* check for EOF */
if (position + count > dv_size) count = dv_size - position;
if (opcode == DEV_GATHER) { /* copy actual data */
sys_vircopy(SELF, D, (vir_bytes)&imgrd[position],
proc_nr, D, user_vir, count);
} else {
sys_vircopy(proc_nr, D, user_vir,
SELF, D, (vir_bytes)&imgrd[position], count);
}
break;
/* Unknown (illegal) minor device. */
default:
return(EINVAL);
@ -278,6 +293,10 @@ PRIVATE void m_init()
printf("MEM stored retrieved details as new RAM disk\n");
}
/* Ramdisk image built into the memory driver */
m_geom[IMGRD_DEV].dv_base= cvul64(0);
m_geom[IMGRD_DEV].dv_size= cvul64(imgrd_size);
/* Initialize /dev/zero. Simply write zeros into the buffer. */
for (i=0; i<ZERO_BUF_SIZE; i++) {
dev_zero[i] = '\0';
@ -320,19 +339,31 @@ message *m_ptr; /* pointer to control message */
switch (m_ptr->REQUEST) {
case MIOCRAMSIZE: {
/* FS wants to create a new RAM disk with the given size. */
phys_bytes ramdev_size;
/* Someone wants to create a new RAM disk with the given size. */
static int first_time= 1;
u32_t ramdev_size;
phys_bytes ramdev_base;
message m;
int s;
/* Only FS can create RAM disk, and only on RAM disk device. */
if (m_ptr->PROC_NR != FS_PROC_NR) return(EPERM);
/* A ramdisk can be created only once, and only on RAM disk device. */
if (!first_time) return(EPERM);
if (m_ptr->DEVICE != RAM_DEV) return(EINVAL);
if ((dv = m_prepare(m_ptr->DEVICE)) == NIL_DEV) return(ENXIO);
#if 0
ramdev_size= m_ptr->POSITION;
#else
/* Get request structure */
s= sys_vircopy(m_ptr->PROC_NR, D, (vir_bytes)m_ptr->ADDRESS,
SELF, D, (vir_bytes)&ramdev_size, sizeof(ramdev_size));
if (s != OK)
return s;
#endif
printf("allocating ramdisk of size 0x%x\n", ramdev_size);
/* Try to allocate a piece of memory for the RAM disk. */
ramdev_size = m_ptr->POSITION;
if (allocmem(ramdev_size, &ramdev_base) < 0) {
report("MEM", "warning, allocmem failed", errno);
return(ENOMEM);
@ -359,6 +390,7 @@ message *m_ptr; /* pointer to control message */
dv->dv_base = cvul64(ramdev_base);
dv->dv_size = cvul64(ramdev_size);
/* first_time= 0; */
break;
}
case MIOCMAP:

81
drivers/memory/ramdisk/Makefile Normal file
View file

@ -0,0 +1,81 @@
# Makefile for ramdisk image
PROGRAMS=at_wini bios_wini cdprobe dev2name floppy loadramdisk newroot \
sh service sysenv
all: image.c
clean:
rm -f $(PROGRAMS) bintoc image image.c
image.c: bintoc image
./bintoc -o $@ image
# Note for cross compilation: this executable has to be compiled for the
# host system
bintoc: bintoc.c
$(CC) -o $@ bintoc.c
image: proto mtab rc $(PROGRAMS)
mkfs -B1024 image proto || { rm -f image; false; }
at_wini: ../../at_wini/at_wini
install -s ../../$@/$@ $@
../../at_wini/at_wini:
cd ../../at_wini && make
bios_wini: ../../bios_wini/bios_wini
install -s ../../$@/$@ $@
../../bios_wini/bios_wini:
cd ../../bios_wini && make
floppy: ../../floppy/floppy
install -s ../../$@/$@ $@
../../floppy/floppy:
cd ../../floppy && make
cdprobe: ../../../commands/simple/cdprobe
install -s ../../../commands/simple/$@ $@
../../../commands/simple/cdprobe:
cd ../../../commands/simple && make cdprobe
dev2name: ../../../commands/simple/dev2name
install -s ../../../commands/simple/$@ $@
../../../commands/simple/dev2name:
cd ../../../commands/simple && make dev2name
loadramdisk: ../../../commands/simple/loadramdisk
install -s ../../../commands/simple/$@ $@
../../../commands/simple/loadramdisk:
cd ../../../commands/simple && make loadramdisk
newroot: ../../../commands/simple/newroot
install -s ../../../commands/simple/$@ $@
../../../commands/simple/newroot:
cd ../../../commands/simple && make newroot
sysenv: ../../../commands/simple/sysenv
install -s ../../../commands/simple/$@ $@
../../../commands/simple/sysenv:
cd ../../../commands/simple && make sysenv
sh: ../../../commands/ash/sh
install -s ../../../commands/ash/$@ $@
../../../commands/ash/sh:
cd ../../../commands/ash && make sh
service: ../../../servers/rs/service
install -s ../../../servers/rs/$@ $@
../../../servers/rs/service:
cd ../../../servers/rs && make service

129
drivers/memory/ramdisk/bintoc.c Normal file
View file

@ -0,0 +1,129 @@
/*
bintoc.c
Convert a (binary) file to a series of comma separated hex values suitable
for initializing a character array in C.
*/
#define _POSIX_C_SOURCE 2
#include <errno.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
char *progname;
unsigned char buf[1024];
static void fatal(char *fmt, ...);
static void usage(void);
int main(int argc, char *argv[])
{
int c, i, r, first;
FILE *file_in, *file_out;
char *in_name;
char *o_arg;
(progname=strrchr(argv[0],'/')) ? progname++ : (progname=argv[0]);
o_arg= NULL;
while (c= getopt(argc, argv, "?o:"), c != -1)
{
switch(c)
{
case '?': usage();
case 'o': o_arg= optarg; break;
default: fatal("getopt failed: '%c'\n", c);
}
}
if (o_arg)
{
file_out= fopen(o_arg, "w");
if (file_out == NULL)
{
fatal("unable to create '%s': %s\n",
o_arg, strerror(errno));
exit(1);
}
}
else
file_out= stdout;
if (optind < argc)
{
in_name= argv[optind];
optind++;
file_in= fopen(in_name, "r");
if (file_in == NULL)
{
fatal("unable to open '%s': %s",
in_name, strerror(errno));
}
}
else
{
in_name= "(stdin)";
file_in= stdin;
}
if (optind != argc)
usage();
first= 1;
for (;;)
{
r= fread(buf, 1, sizeof(buf), file_in);
if (r == 0)
break;
for (i= 0; i<r; i++)
{
if ((i % 8) == 0)
{
if (first)
{
fprintf(file_out, "\t");
first= 0;
}
else
fprintf(file_out, ",\n\t");
}
else
fprintf(file_out, ", ");
fprintf(file_out, "0x%02x", buf[i]);
}
}
if (ferror(file_in))
{
fatal("read error on %s: %s\n",
in_name, strerror(errno));
}
fprintf(file_out, "\n");
exit(0);
}
static void fatal(char *fmt, ...)
{
va_list ap;
fprintf(stderr, "%s: ", progname);
va_start(ap, fmt);
vfprintf(stderr, fmt, ap);
va_end(ap);
fprintf(stderr, "\n");
exit(1);
}
static void usage(void)
{
fprintf(stderr, "Usage: bintoc [-o <out-file>] [<in-file>]\n");
exit(1);
}

1
drivers/memory/ramdisk/mtab Executable file
View file

@ -0,0 +1 @@
/dev/imgrd / 3 rw

66
drivers/memory/ramdisk/proto Normal file
View file

@ -0,0 +1,66 @@
boot
200 100
d--755 0 0
bin d--755 0 0
at_wini ---755 0 0 at_wini
bios_wini ---755 0 0 bios_wini
cdprobe ---755 0 0 cdprobe
dev2name ---755 0 0 dev2name
floppy ---755 0 0 floppy
loadramdisk ---755 0 0 loadramdisk
newroot ---755 0 0 newroot
sh ---755 0 0 sh
service ---755 0 0 service
sysenv ---755 0 0 sysenv
$
dev d--755 0 0
c0d0 b--222 0 0 3 0
c0d1 b--222 0 0 3 5
c0d2 b--222 0 0 3 10
c0d3 b--222 0 0 3 15
c0d0p0 b--222 0 0 3 1
c0d0p1 b--222 0 0 3 2
c0d0p2 b--222 0 0 3 3
c0d0p3 b--222 0 0 3 4
c0d1p0 b--222 0 0 3 6
c0d1p1 b--222 0 0 3 7
c0d1p2 b--222 0 0 3 8
c0d1p3 b--222 0 0 3 9
c0d2p0 b--222 0 0 3 11
c0d2p1 b--222 0 0 3 12
c0d2p2 b--222 0 0 3 13
c0d2p3 b--222 0 0 3 14
c0d3p0 b--222 0 0 3 16
c0d3p1 b--222 0 0 3 17
c0d3p2 b--222 0 0 3 18
c0d3p3 b--222 0 0 3 19
c0d0p0s0 b--222 0 0 3 128
c0d0p1s0 b--222 0 0 3 132
c0d0p2s0 b--222 0 0 3 136
c0d0p3s0 b--222 0 0 3 140
c0d1p0s0 b--222 0 0 3 144
c0d1p1s0 b--222 0 0 3 148
c0d1p2s0 b--222 0 0 3 152
c0d1p3s0 b--222 0 0 3 156
c0d2p0s0 b--222 0 0 3 160
c0d2p1s0 b--222 0 0 3 164
c0d2p2s0 b--222 0 0 3 168
c0d2p3s0 b--222 0 0 3 172
c0d3p0s0 b--222 0 0 3 176
c0d3p1s0 b--222 0 0 3 180
c0d3p2s0 b--222 0 0 3 184
c0d3p3s0 b--222 0 0 3 188
fd0 b--222 0 0 2 0
fd0p0 b--222 0 0 2 112
fd0p1 b--222 0 0 2 116
fd0p2 b--222 0 0 2 120
fd0p3 b--222 0 0 2 124
log c--222 0 0 4 15
null c--666 0 0 1 3
ram b--600 0 0 1 0
$
etc d--755 0 0
mtab ---644 0 0 mtab
rc ---755 0 0 rc
$
$

37
drivers/memory/ramdisk/rc Normal file
View file

@ -0,0 +1,37 @@
#!/bin/sh
set -e
/bin/service up /bin/floppy -dev /dev/fd0
if [ X`/bin/sysenv bios_wini` = Xyes ]
then
echo Using bios_wini.
/bin/service up /bin/bios_wini -dev /dev/c0d0
else
/bin/service up /bin/at_wini -dev /dev/c0d0
fi
rootdev=`sysenv rootdev` || echo 'No rootdev?'
rootdevname=`/bin/dev2name "$rootdev"` ||
{ echo 'No device name for root device'; exit 1; }
if sysenv cdproberoot >/dev/null
then
echo
echo 'Looking for boot CD. This may take a minute.'
echo 'Please ignore any error messages.'
echo
cddev=`cdprobe` || { echo 'No CD found'; exit 1; }
export cddev
echo "Loading ramdisk from ${cddev}p1"
loadramdisk "$cddev"p1
elif [ "$rootdevname" = "/dev/ram" ]
then
ramimagedev=`sysenv ramimagedev` ||
{ echo 'ramimagedev not found'; exit 1; }
ramimagename=`/bin/dev2name "$ramimagedev"` ||
{ echo 'No device name for ramimagedev'; exit 1; }
echo "Loading ramdisk from $ramimagename"
loadramdisk "$ramimagename"
fi
echo "Root device name is $rootdevname"
/bin/newroot "$rootdevname"
exec /bin/sh /etc/rc start

9
etc/binary_sizes.big
View file

@ -1,7 +1,10 @@
/usr/lib/cpp.ansi 1416004
/usr/lib/cv 1738570
/usr/lib/em_cemcom.ansi 4683676
/usr/lib/em_led 3078088
/usr/lib/cv 3738570
/usr/lib/em_cemcom.ansi 10683676
/usr/lib/em_led 4078088
/usr/lib/em_opt 1370162
/usr/lib/i386/as 1239922
/usr/lib/i386/cg 1285513
/usr/bin/make 2000000
/bin/sh 1000000
/usr/bin/lex 1000000

6
etc/rc
View file

@ -86,10 +86,10 @@ start)
# where it is based on sysenv (set by FS when probing for CD).
if [ "$bootcd" = 1 ]
then
imagedev="`/bin/sysenv cdproberoot`"
usrdev="`expr $imagedev + 1`"
#imagedev="`/bin/sysenv cdproberoot`"
#usrdev="`expr $imagedev + 1`"
usr_roflag="-r"
usr="`/bin/dev2name $usrdev`"
usr="$cddev"p2
echo "Setting /usr on cd is $usr"
fi

7
include/minix/com.h
View file

@ -37,10 +37,9 @@
#define MEM_PROC_NR 3 /* memory driver (RAM disk, null, etc.) */
#define LOG_PROC_NR 4 /* log device driver */
#define TTY_PROC_NR 5 /* terminal (TTY) driver */
#define DRVR_PROC_NR 6 /* device driver for boot medium */
#define DS_PROC_NR 7 /* data store server */
#define PCI_PROC_NR 8 /* driver for PCI controllers */
#define INIT_PROC_NR 9 /* init -- goes multiuser */
#define DS_PROC_NR 6 /* data store server */
#define PCI_PROC_NR 7 /* driver for PCI controllers */
#define INIT_PROC_NR 8 /* init -- goes multiuser */
/* Number of processes contained in the system image. */
#define NR_BOOT_PROCS (NR_TASKS + INIT_PROC_NR + 1)

2
include/minix/dmap.h
View file

@ -41,12 +41,14 @@ extern struct dmap {
# define NULL_DEV 3 /* minor device for /dev/null */
# define BOOT_DEV 4 /* minor device for /dev/boot */
# define ZERO_DEV 5 /* minor device for /dev/zero */
# define IMGRD_DEV 6 /* minor device for /dev/imgrd */
#define CTRLR(n) ((n)==0 ? 3 : (8 + 2*((n)-1))) /* magic formula */
/* Full device numbers that are special to the boot monitor and FS. */
# define DEV_RAM 0x0100 /* device number of /dev/ram */
# define DEV_BOOT 0x0104 /* device number of /dev/boot */
# define DEV_IMGRD 0x0106 /* device number of /dev/imgrd */
#define FLOPPY_MAJOR 2 /* major device for floppy disks */
#define TTY_MAJOR 4 /* major device for ttys */

2
kernel/table.c
View file

@ -107,7 +107,9 @@ PUBLIC struct boot_image image[] = {
{ TTY_PROC_NR, 0, SRV_F, 4, 1, 0, SRV_T, SYS_M, TTY_C, "tty" },
{ MEM_PROC_NR, 0, SRV_F, 4, 2, 0, SRV_T, SYS_M, MEM_C, "memory"},
{ LOG_PROC_NR, 0, SRV_F, 4, 2, 0, SRV_T, SYS_M, DRV_C, "log" },
#if 0
{ DRVR_PROC_NR, 0, SRV_F, 4, 2, 0, SRV_T, SYS_M, DRV_C, "driver"},
#endif
{ PCI_PROC_NR, 0, SRV_F, 4, 2, 0, SRV_T, SYS_M, PCI_C, "pci"},
{ INIT_PROC_NR, 0, USR_F, 8, USER_Q, 0, USR_T, USR_M, 0, "init" },
};

2
servers/fs/dmap.c
View file

@ -185,6 +185,7 @@ PUBLIC void build_dmap()
}
}
#if 0
/* Get settings of 'controller' and 'driver' at the boot monitor. */
if ((s = env_get_param("label", driver, sizeof(driver))) != OK)
panic(__FILE__,"couldn't get boot monitor parameter 'driver'", s);
@ -209,6 +210,7 @@ PUBLIC void build_dmap()
panic(__FILE__,"map_driver failed",s);
printf("Boot medium driver: %s driver mapped onto controller %s.\n",
driver, controller);
#endif
}
/*===========================================================================*

8
servers/fs/main.c
View file

@ -277,6 +277,7 @@ PRIVATE void load_ram(void)
/* Get some boot environment variables. */
root_dev = igetenv("rootdev", 0);
root_dev = DEV_IMGRD;
image_dev = igetenv("ramimagedev", 0);
ram_size_kb = igetenv("ramsize", 0);
@ -284,6 +285,7 @@ PRIVATE void load_ram(void)
if (dev_open(root_dev, FS_PROC_NR, R_BIT|W_BIT) != OK)
panic(__FILE__,"Cannot open root device",NO_NUM);
#if 0
/* If we must initialize a ram disk, get details from the image device. */
if (root_dev == DEV_RAM) {
u32_t fsmax, probedev;
@ -329,6 +331,7 @@ PRIVATE void load_ram(void)
if (ram_size_kb*1024 > fsmax*sp->s_block_size)
ram_size_kb = fsmax*sp->s_block_size/1024;
}
#endif
/* Tell RAM driver how big the RAM disk must be. */
m_out.m_type = DEV_IOCTL;
@ -336,6 +339,7 @@ PRIVATE void load_ram(void)
m_out.DEVICE = RAM_DEV;
m_out.REQUEST = MIOCRAMSIZE; /* I/O control to use */
m_out.POSITION = (ram_size_kb * 1024); /* request in bytes */
#if 0
if ((s=sendrec(MEM_PROC_NR, &m_out)) != OK)
panic("FS","sendrec from MEM failed", s);
else if (m_out.REP_STATUS != OK) {
@ -347,6 +351,7 @@ PRIVATE void load_ram(void)
panic(__FILE__,"can't set RAM disk size", m_out.REP_STATUS);
}
}
#endif
#if ENABLE_CACHE2
/* The RAM disk is a second level block cache while not otherwise used. */
@ -357,6 +362,8 @@ PRIVATE void load_ram(void)
if (root_dev != DEV_RAM)
return;
#if 0
/* Copy the blocks one at a time from the image to the RAM disk. */
printf("Loading RAM disk onto /dev/ram:\33[23CLoaded: 0 KB");
@ -424,6 +431,7 @@ PRIVATE void load_ram(void)
sbbuf, SUPER_BLOCK_BYTES, _MIN_BLOCK_SIZE, 0) != _MIN_BLOCK_SIZE) {
printf("WARNING: ramdisk write for resizing failed\n");
}
#endif
}
/*===========================================================================*

141
servers/fs/mount.c
View file

@ -7,6 +7,7 @@
#include "fs.h"
#include <fcntl.h>
#include <string.h>
#include <minix/com.h>
#include <sys/stat.h>
#include "buf.h"
@ -16,6 +17,9 @@
#include "param.h"
#include "super.h"
/* Allow the root to be replaced before the first 'real' mount. */
PRIVATE int allow_newroot= 1;
FORWARD _PROTOTYPE( dev_t name_to_dev, (char *path) );
/*===========================================================================*
@ -30,7 +34,8 @@ PUBLIC int do_mount()
dev_t dev;
mode_t bits;
int rdir, mdir; /* TRUE iff {root|mount} file is dir */
int r, found;
int i, r, found;
struct fproc *tfp;
/* Only the super-user may do MOUNT. */
if (!super_user) return(EPERM);
@ -43,10 +48,87 @@ PUBLIC int do_mount()
sp = NIL_SUPER;
found = FALSE;
for (xp = &super_block[0]; xp < &super_block[NR_SUPERS]; xp++) {
if (xp->s_dev == dev) found = TRUE; /* is it mounted already? */
if (xp->s_dev == dev)
{
/* is it mounted already? */
found = TRUE;
sp= xp;
break;
}
if (xp->s_dev == NO_DEV) sp = xp; /* record free slot */
}
if (found) return(EBUSY); /* already mounted */
if (found)
{
printf(
"do_mount: s_imount = 0x%x (%x, %d), s_isup = 0x%x (%x, %d), fp_rootdir = 0x%x\n",
xp->s_imount, xp->s_imount->i_dev, xp->s_imount->i_num,
xp->s_isup, xp->s_isup->i_dev, xp->s_isup->i_num,
fproc[FS_PROC_NR].fp_rootdir);
/* It is possible that we have an old root lying around that
* needs to be remounted.
*/
if (xp->s_imount != xp->s_isup ||
xp->s_isup == fproc[FS_PROC_NR].fp_rootdir)
{
/* Normally, s_imount refers to the mount point. For a root
* filesystem, s_imount is equal to the root inode. We assume
* that the root of FS is always the real root. If the two
* inodes are different or if the root of FS is equal two the
* root of the filesystem we found, we found a filesystem that
* is in use.
*/
return(EBUSY); /* already mounted */
}
if (root_dev == xp->s_dev)
{
panic("fs", "inconsistency remounting old root",
NO_NUM);
}
/* Now get the inode of the file to be mounted on. */
if (fetch_name(m_in.name2, m_in.name2_length, M1) != OK) {
return(err_code);
}
if ( (rip = eat_path(user_path)) == NIL_INODE) {
return(err_code);
}
r = OK;
/* It may not be special. */
bits = rip->i_mode & I_TYPE;
if (bits == I_BLOCK_SPECIAL || bits == I_CHAR_SPECIAL)
r = ENOTDIR;
/* Get the root inode of the mounted file system. */
root_ip= sp->s_isup;
/* File types of 'rip' and 'root_ip' may not conflict. */
if (r == OK) {
mdir = ((rip->i_mode & I_TYPE) == I_DIRECTORY);
/* TRUE iff dir */
rdir = ((root_ip->i_mode & I_TYPE) == I_DIRECTORY);
if (!mdir && rdir) r = EISDIR;
}
/* If error, return the mount point. */
if (r != OK) {
put_inode(rip);
return(r);
}
/* Nothing else can go wrong. Perform the mount. */
rip->i_mount = I_MOUNT; /* this bit says the inode is
* mounted on
*/
put_inode(sp->s_imount);
sp->s_imount = rip;
sp->s_rd_only = m_in.rd_only;
allow_newroot= 0; /* The root is now fixed */
return(OK);
}
if (sp == NIL_SUPER) return(ENFILE); /* no super block available */
/* Open the device the file system lives on. */
@ -74,6 +156,58 @@ PUBLIC int do_mount()
sp->s_dev = NO_DEV;
return(err_code);
}
if (strcmp(user_path, "/") == 0 && allow_newroot)
{
printf("Replacing root\n");
/* Get the root inode of the mounted file system. */
if ( (root_ip = get_inode(dev, ROOT_INODE)) == NIL_INODE) r = err_code;
if (root_ip != NIL_INODE && root_ip->i_mode == 0) {
r = EINVAL;
}
/* If error, return the super block and both inodes; release the
* maps.
*/
if (r != OK) {
put_inode(root_ip);
(void) do_sync();
invalidate(dev);
dev_close(dev);
sp->s_dev = NO_DEV;
return(r);
}
/* Nothing else can go wrong. Perform the mount. */
sp->s_imount = root_ip;
dup_inode(root_ip);
sp->s_isup = root_ip;
sp->s_rd_only = m_in.rd_only;
root_dev= dev;
/* Replace all root and working directories */
for (i= 0, tfp= fproc; i<NR_PROCS; i++, tfp++)
{
if (tfp->fp_pid == PID_FREE)
continue;
if (tfp->fp_rootdir == NULL)
panic("fs", "do_mount: null rootdir", i);
put_inode(tfp->fp_rootdir);
dup_inode(root_ip);
tfp->fp_rootdir= root_ip;
if (tfp->fp_workdir == NULL)
panic("fs", "do_mount: null workdir", i);
put_inode(tfp->fp_workdir);
dup_inode(root_ip);
tfp->fp_workdir= root_ip;
}
/* Leave the old filesystem lying around. */
return(OK);
}
if ( (rip = eat_path(user_path)) == NIL_INODE) {
dev_close(dev);
sp->s_dev = NO_DEV;
@ -120,6 +254,7 @@ PUBLIC int do_mount()
sp->s_imount = rip;
sp->s_isup = root_ip;
sp->s_rd_only = m_in.rd_only;
allow_newroot= 0; /* The root is now fixed */
return(OK);
}

25
servers/fs/path.c
View file

@ -299,19 +299,18 @@ char string[NAME_MAX]; /* component name to look for */
if (rip->i_num == ROOT_INODE)
if (dirp->i_num == ROOT_INODE) {
if (string[1] == '.') {
for (sp = &super_block[1]; sp < &super_block[NR_SUPERS]; sp++){
if (sp->s_dev == rip->i_dev) {
/* Release the root inode. Replace by the
* inode mounted on. Update parent.
*/
put_inode(rip);
put_inode(dirp);
mnt_dev = sp->s_imount->i_dev;
inumb = (int) sp->s_imount->i_num;
dirp = *pdirp = get_inode(mnt_dev, inumb);
rip = advance(pdirp, string);
break;
}
sp= rip->i_sp;
if (sp->s_imount != sp->s_isup)
{
/* Release the root inode. Replace by the
* inode mounted on. Update parent.
*/
put_inode(rip);
put_inode(dirp);
mnt_dev = sp->s_imount->i_dev;
inumb = (int) sp->s_imount->i_num;
dirp = *pdirp = get_inode(mnt_dev, inumb);
rip = advance(pdirp, string);
}
}
}

7
tools/Makefile
View file

@ -19,13 +19,8 @@ PROGRAMS= ../kernel/kernel \
../drivers/tty/tty \
../drivers/memory/memory \
../drivers/log/log \
AT:../drivers/at_wini/at_wini \
BIOS:../drivers/bios_wini/bios_wini \
FLOPPY:../drivers/floppy/floppy \
../drivers/pci/pci \
../servers/init/init \
# bootdev.img
../servers/init/init
usage:
@echo " " >&2