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freebsd-nq/sbin/mdconfig/mdconfig.c
Mike Barcroft 40dcc8608d Revert 1.20: 
Memory disks may be used for other purposes besides newfs(8), so it
isn't helpful to require the minimum size meet newfs(8)'s criteria.
2002-03-21 12:03:09 +00:00

317 lines
7.9 KiB
C
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/*
* ----------------------------------------------------------------------------
* "THE BEER-WARE LICENSE" (Revision 42):
* <phk@FreeBSD.ORG> wrote this file. As long as you retain this notice you
* can do whatever you want with this stuff. If we meet some day, and you think
* this stuff is worth it, you can buy me a beer in return. Poul-Henning Kamp
* ----------------------------------------------------------------------------
*
* $FreeBSD$
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <unistd.h>
#include <string.h>
#include <err.h>
#include <sys/ioctl.h>
#include <sys/param.h>
#include <sys/module.h>
#include <sys/linker.h>
#include <sys/mdioctl.h>
#include <sys/sysctl.h>
#include <sys/queue.h>
int list(const int);
void mdmaybeload(void);
int query(const int, const int);
void usage(void);
struct md_ioctl mdio;
enum {UNSET, ATTACH, DETACH, LIST} action = UNSET;
void
usage()
{
fprintf(stderr, "Usage:\n");
fprintf(stderr, "\tmdconfig -a -t type [-o [no]option]... [ -f file] [-s size] [-u unit]\n");
fprintf(stderr, "\tmdconfig -d -u unit\n");
fprintf(stderr, "\tmdconfig -l [-u unit]\n");
fprintf(stderr, "\t\ttype = {malloc, preload, vnode, swap}\n");
fprintf(stderr, "\t\toption = {cluster, compress, reserve}\n");
fprintf(stderr, "\t\tsize = %%d (512 byte blocks), %%dk (kB), %%dm (MB) or %%dg (GB)\n");
exit(1);
}
int
main(int argc, char **argv)
{
int ch, fd, i;
char *p;
int cmdline = 0;
for (;;) {
ch = getopt(argc, argv, "ab:df:lo:s:t:u:");
if (ch == -1)
break;
switch (ch) {
case 'a':
if (cmdline != 0)
usage();
action = ATTACH;
cmdline = 1;
break;
case 'd':
if (cmdline != 0)
usage();
action = DETACH;
mdio.md_options = MD_AUTOUNIT;
cmdline = 3;
break;
case 'l':
if (cmdline != 0)
usage();
action = LIST;
mdio.md_options = MD_AUTOUNIT;
cmdline = 3;
break;
case 't':
if (cmdline != 1)
usage();
if (!strcmp(optarg, "malloc")) {
mdio.md_type = MD_MALLOC;
mdio.md_options = MD_AUTOUNIT | MD_COMPRESS;
} else if (!strcmp(optarg, "preload")) {
mdio.md_type = MD_PRELOAD;
mdio.md_options = 0;
} else if (!strcmp(optarg, "vnode")) {
mdio.md_type = MD_VNODE;
mdio.md_options = MD_CLUSTER | MD_AUTOUNIT | MD_COMPRESS;
} else if (!strcmp(optarg, "swap")) {
mdio.md_type = MD_SWAP;
mdio.md_options = MD_CLUSTER | MD_AUTOUNIT | MD_COMPRESS;
} else {
usage();
}
cmdline=2;
break;
case 'f':
if (cmdline != 1 && cmdline != 2)
usage();
if (cmdline == 1) {
/* Imply ``-t vnode'' */
mdio.md_type = MD_VNODE;
mdio.md_options = MD_CLUSTER | MD_AUTOUNIT | MD_COMPRESS;
}
mdio.md_file = optarg;
break;
case 'o':
if (cmdline != 2)
usage();
if (!strcmp(optarg, "cluster"))
mdio.md_options |= MD_CLUSTER;
else if (!strcmp(optarg, "nocluster"))
mdio.md_options &= ~MD_CLUSTER;
else if (!strcmp(optarg, "compress"))
mdio.md_options |= MD_COMPRESS;
else if (!strcmp(optarg, "nocompress"))
mdio.md_options &= ~MD_COMPRESS;
else if (!strcmp(optarg, "force"))
mdio.md_options |= MD_FORCE;
else if (!strcmp(optarg, "noforce"))
mdio.md_options &= ~MD_FORCE;
else if (!strcmp(optarg, "reserve"))
mdio.md_options |= MD_RESERVE;
else if (!strcmp(optarg, "noreserve"))
mdio.md_options &= ~MD_RESERVE;
else
errx(1, "Unknown option.");
break;
case 's':
if (cmdline != 2)
usage();
mdio.md_size = strtoul(optarg, &p, 0);
if (p == NULL || *p == '\0')
;
else if (*p == 'k' || *p == 'K')
mdio.md_size *= (1024 / DEV_BSIZE);
else if (*p == 'm' || *p == 'M')
mdio.md_size *= (1024 * 1024 / DEV_BSIZE);
else if (*p == 'g' || *p == 'G')
mdio.md_size *= (1024 * 1024 * 1024 / DEV_BSIZE);
else
errx(1, "Unknown suffix on -s argument");
break;
case 'u':
if (cmdline != 2 && cmdline != 3)
usage();
if (!strncmp(optarg, "/dev/", 5))
optarg += 5;
if (!strncmp(optarg, MD_NAME, sizeof(MD_NAME) - 1))
optarg += sizeof(MD_NAME) - 1;
mdio.md_unit = strtoul(optarg, &p, 0);
if ((unsigned)mdio.md_unit == ULONG_MAX || *p != '\0')
errx(1, "bad unit: %s", optarg);
mdio.md_options &= ~MD_AUTOUNIT;
break;
default:
usage();
}
}
mdio.md_version = MDIOVERSION;
mdmaybeload();
fd = open("/dev/" MDCTL_NAME, O_RDWR, 0);
if (fd < 0)
err(1, "open(/dev/%s)", MDCTL_NAME);
if (cmdline == 2
&& (mdio.md_type == MD_MALLOC || mdio.md_type == MD_SWAP))
if (mdio.md_size == 0)
errx(1, "must specify -s for -t malloc or -t swap");
if (action == LIST) {
if (mdio.md_options & MD_AUTOUNIT)
list(fd);
else
query(fd, mdio.md_unit);
} else if (action == ATTACH) {
i = ioctl(fd, MDIOCATTACH, &mdio);
if (i < 0)
err(1, "ioctl(/dev/%s)", MDCTL_NAME);
if (mdio.md_options & MD_AUTOUNIT)
printf("%s%d\n", MD_NAME, mdio.md_unit);
} else if (action == DETACH) {
if (mdio.md_options & MD_AUTOUNIT)
usage();
i = ioctl(fd, MDIOCDETACH, &mdio);
if (i < 0)
err(1, "ioctl(/dev/%s)", MDCTL_NAME);
} else
usage();
close (fd);
return (0);
}
struct dl {
int unit;
SLIST_ENTRY(dl) slist;
};
SLIST_HEAD(, dl) dlist = SLIST_HEAD_INITIALIZER(&dlist);
int
list(const int fd)
{
char *disklist, *p, *p2, *p3;
int unit;
size_t dll;
struct dl *dp, *di, *dn;
if (sysctlbyname("kern.disks", NULL, &dll, NULL, 0) == -1)
err(1, "sysctlbyname: kern.disks");
if ( (disklist = malloc(dll)) == NULL)
err(1, "malloc");
if (sysctlbyname("kern.disks", disklist, &dll, NULL, NULL) == -1)
err(1, "sysctlbyname: kern.disks");
for (p = disklist;
(p2 = strsep(&p, " ")) != NULL;) {
if (strncmp(p2, MD_NAME, sizeof(MD_NAME) - 1) != 0)
continue;
p2 += sizeof(MD_NAME) - 1;
unit = strtoul(p2, &p3, 10);
if (p2 == p3)
continue;
dp = calloc(sizeof *dp, 1);
dp->unit = unit;
dn = SLIST_FIRST(&dlist);
if (dn == NULL || dn->unit > unit) {
SLIST_INSERT_HEAD(&dlist, dp, slist);
} else {
SLIST_FOREACH(di, &dlist, slist) {
dn = SLIST_NEXT(di, slist);
if (dn == NULL || dn->unit > unit) {
SLIST_INSERT_AFTER(di, dp, slist);
break;
}
}
}
}
SLIST_FOREACH(di, &dlist, slist)
query(fd, di->unit);
while (!SLIST_EMPTY(&dlist)) {
di = SLIST_FIRST(&dlist);
SLIST_REMOVE_HEAD(&dlist, slist);
free(di);
}
free(disklist);
return (0);
}
int
query(const int fd, const int unit)
{
mdio.md_version = MDIOVERSION;
mdio.md_unit = unit;
if (ioctl(fd, MDIOCQUERY, &mdio) < 0)
err(1, "ioctl(/dev/%s)", MDCTL_NAME);
switch (mdio.md_type) {
case MD_MALLOC:
(void)printf("%s%d\tmalloc\t%d KBytes\n", MD_NAME,
mdio.md_unit, mdio.md_size / 2);
break;
case MD_PRELOAD:
(void)printf("%s%d\tpreload\t%d KBytes\n", MD_NAME,
mdio.md_unit, mdio.md_size / 2);
break;
case MD_SWAP:
(void)printf("%s%d\tswap\t%d KBytes\n", MD_NAME,
mdio.md_unit, mdio.md_size / 2);
break;
case MD_VNODE:
(void)printf("%s%d\tvnode\t%d KBytes\n", MD_NAME,
mdio.md_unit, mdio.md_size / 2);
break;
}
return (0);
}
void
mdmaybeload(void)
{
struct module_stat mstat;
int fileid, modid;
const char *name;
char *cp;
name = MD_NAME;
/* scan files in kernel */
mstat.version = sizeof(struct module_stat);
for (fileid = kldnext(0); fileid > 0; fileid = kldnext(fileid)) {
/* scan modules in file */
for (modid = kldfirstmod(fileid); modid > 0;
modid = modfnext(modid)) {
if (modstat(modid, &mstat) < 0)
continue;
/* strip bus name if present */
if ((cp = strchr(mstat.name, '/')) != NULL) {
cp++;
} else {
cp = mstat.name;
}
/* already loaded? */
if (!strcmp(name, cp))
return;
}
}
/* not present, we should try to load it */
kldload(name);
}
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