/*
* ----------------------------------------------------------------------------
* "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 <sys/param.h>
#include <sys/devicestat.h>
#include <sys/ioctl.h>
#include <sys/linker.h>
#include <sys/mdioctl.h>
#include <sys/module.h>
#include <sys/resource.h>
#include <sys/stat.h>
#include <assert.h>
#include <devstat.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <inttypes.h>
#include <libgeom.h>
#include <libutil.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
static struct md_ioctl mdio;
static enum {UNSET, ATTACH, DETACH, LIST} action = UNSET;
static int nflag;
static void usage(void);
static int md_find(char *, const char *);
static int md_query(char *name);
static int md_list(char *units, int opt);
static char *geom_config_get(struct gconf *g, char *name);
static void md_prthumanval(char *length);
#define OPT_VERBOSE 0x01
#define OPT_UNIT 0x02
#define OPT_DONE 0x04
#define OPT_LIST 0x10
#define CLASS_NAME_MD "MD"
static void
usage()
{
fprintf(stderr,
"usage: mdconfig -a -t type [-n] [-o [no]option] ... [-f file]\n"
" [-s size] [-S sectorsize] [-u unit]\n"
" [-x sectors/track] [-y heads/cyl]\n"
" mdconfig -d -u unit\n"
" mdconfig -l [-n] [-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), %%db (B),\n");
fprintf(stderr, "\t\t %%dk (kB), %%dm (MB), %%dg (GB) or\n");
fprintf(stderr, "\t\t %%dt (TB)\n");
exit(1);
}
int
main(int argc, char **argv)
{
int ch, fd, i;
char *p;
int cmdline = 0;
char *mdunit;
bzero(&mdio, sizeof(mdio));
mdio.md_file = malloc(PATH_MAX);
if (mdio.md_file == NULL)
err(1, "could not allocate memory");
bzero(mdio.md_file, PATH_MAX);
for (;;) {
ch = getopt(argc, argv, "ab:df:lno:s:S:t:u:x:y:");
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 'n':
nflag = 1;
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 != 0 && cmdline != 1 && cmdline != 2)
usage();
if (cmdline == 0) {
action = ATTACH;
cmdline = 1;
}
if (cmdline == 1) {
/* Imply ``-t vnode'' */
mdio.md_type = MD_VNODE;
mdio.md_options = MD_CLUSTER | MD_AUTOUNIT | MD_COMPRESS;
cmdline = 2;
}
if (realpath(optarg, mdio.md_file) == NULL) {
err(1, "could not find full path for %s",
optarg);
}
fd = open(mdio.md_file, O_RDONLY);
if (fd < 0)
err(1, "could not open %s", optarg);
else if (mdio.md_mediasize == 0) {
struct stat sb;
if (fstat(fd, &sb) == -1)
err(1, "could not stat %s", optarg);
mdio.md_mediasize = sb.st_size;
}
close(fd);
break;
case 'o':
if (cmdline != 2)
usage();
if (!strcmp(optarg, "async"))
mdio.md_options |= MD_ASYNC;
else if (!strcmp(optarg, "noasync"))
mdio.md_options &= ~MD_ASYNC;
else 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, "readonly"))
mdio.md_options |= MD_READONLY;
else if (!strcmp(optarg, "noreadonly"))
mdio.md_options &= ~MD_READONLY;
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: %s.", optarg);
break;
case 'S':
if (cmdline != 2)
usage();
mdio.md_sectorsize = strtoul(optarg, &p, 0);
break;
case 's':
if (cmdline != 2)
usage();
mdio.md_mediasize = (off_t)strtoumax(optarg, &p, 0);
if (p == NULL || *p == '\0')
mdio.md_mediasize *= DEV_BSIZE;
else if (*p == 'b' || *p == 'B')
; /* do nothing */
else if (*p == 'k' || *p == 'K')
mdio.md_mediasize <<= 10;
else if (*p == 'm' || *p == 'M')
mdio.md_mediasize <<= 20;
else if (*p == 'g' || *p == 'G')
mdio.md_mediasize <<= 30;
else if (*p == 't' || *p == 'T') {
mdio.md_mediasize <<= 30;
mdio.md_mediasize <<= 10;
} 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 (mdio.md_unit == (unsigned)ULONG_MAX || *p != '\0')
errx(1, "bad unit: %s", optarg);
mdunit = optarg;
mdio.md_options &= ~MD_AUTOUNIT;
break;
case 'x':
if (cmdline != 2)
usage();
mdio.md_fwsectors = strtoul(optarg, &p, 0);
break;
case 'y':
if (cmdline != 2)
usage();
mdio.md_fwheads = strtoul(optarg, &p, 0);
break;
default:
usage();
}
}
mdio.md_version = MDIOVERSION;
if (!kld_isloaded("g_md") && kld_load("geom_md") == -1)
err(1, "failed to load geom_md module");
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_mediasize == 0)
errx(1, "must specify -s for -t malloc or -t swap");
if (cmdline == 2 && mdio.md_type == MD_VNODE)
if (mdio.md_file[0] == '\0')
errx(1, "must specify -f for -t vnode");
if (mdio.md_type == MD_VNODE &&
(mdio.md_options & MD_READONLY) == 0) {
if (access(mdio.md_file, W_OK) < 0 &&
(errno == EACCES || errno == EPERM || errno == EROFS)) {
fprintf(stderr,
"WARNING: opening backing store: %s readonly\n",
mdio.md_file);
mdio.md_options |= MD_READONLY;
}
}
if (action == LIST) {
if (mdio.md_options & MD_AUTOUNIT) {
/*
* Listing all devices. This is why we pass NULL
* together with OPT_LIST.
*/
md_list(NULL, OPT_LIST);
} else {
md_query(mdunit);
}
} else if (action == ATTACH) {
if (cmdline < 2)
usage();
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", nflag ? "" : 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);
}
/*
* Lists md(4) disks. Is used also as a query routine, since it handles XML
* interface. 'units' can be NULL for listing memory disks. It might be
* coma-separated string containing md(4) disk names. 'opt' distinguished
* between list and query mode.
*/
static int
md_list(char *units, int opt)
{
struct gmesh gm;
struct gprovider *pp;
struct gconf *gc;
struct gident *gid;
struct devstat *gsp;
struct ggeom *gg;
struct gclass *gcl;
void *sq;
int retcode;
char *type, *file, *length;
type = file = length = NULL;
retcode = geom_gettree(&gm);
if (retcode != 0)
return (-1);
retcode = geom_stats_open();
if (retcode != 0)
return (-1);
sq = geom_stats_snapshot_get();
if (sq == NULL)
return (-1);
while ((gsp = geom_stats_snapshot_next(sq)) != NULL) {
gid = geom_lookupid(&gm, gsp->id);
if (gid == NULL)
continue;
if (gid->lg_what == ISPROVIDER) {
pp = gid->lg_ptr;
gg = pp->lg_geom;
gcl = gg->lg_class;
if (strcmp(gcl->lg_name, CLASS_NAME_MD) != 0)
continue;
if ((opt & OPT_UNIT) && (units != NULL)) {
retcode = md_find(units, pp->lg_name);
if (retcode != 1)
continue;
}
gc = &pp->lg_config;
printf("%s", pp->lg_name);
if (opt & OPT_VERBOSE || opt & OPT_UNIT) {
type = geom_config_get(gc, "type");
if (strcmp(type, "vnode") == 0)
file = geom_config_get(gc, "file");
length = geom_config_get(gc, "length");
if (length == NULL)
length = "<a>";
printf("\t%s\t", type);
md_prthumanval(length);
if (file != NULL) {
printf("\t%s", file);
file = NULL;
}
}
opt |= OPT_DONE;
if (opt & OPT_LIST)
printf(" ");
else
printf("\n");
}
}
if ((opt & OPT_LIST) && (opt & OPT_DONE))
printf("\n");
/* XXX: Check if it's enough to clean everything. */
geom_stats_snapshot_free(sq);
return (-1);
}
/*
* Returns value of 'name' from gconfig structure.
*/
static char *
geom_config_get(struct gconf *g, char *name)
{
struct gconfig *gce;
LIST_FOREACH(gce, g, lg_config) {
if (strcmp(gce->lg_name, name) == 0)
return (gce->lg_val);
}
return (NULL);
}
/*
* List is comma separated list of MD disks. name is a
* device name we look for. Returns 1 if found and 0
* otherwise.
*/
static int
md_find(char *list, const char *name)
{
int ret;
char num[16];
char *ptr, *p, *u;
ret = 0;
ptr = strdup(list);
if (ptr == NULL)
return (-1);
for (p = ptr; (u = strsep(&p, ",")) != NULL;) {
if (strncmp(u, "/dev/", 5) == 0)
u += 5;
/* Just in case user specified number instead of full name */
snprintf(num, sizeof(num), "md%s", u);
if (strcmp(u, name) == 0 || strcmp(num, name) == 0) {
ret = 1;
break;
}
}
free(ptr);
return (ret);
}
static void
md_prthumanval(char *length)
{
char buf[6];
uint64_t bytes;
char *endptr;
bytes = strtoul(length, &endptr, 10);
if (bytes == (unsigned)ULONG_MAX || *endptr != '\0')
return;
humanize_number(buf, sizeof(buf) - (bytes < 0 ? 0 : 1),
bytes, "", HN_AUTOSCALE, HN_B | HN_NOSPACE | HN_DECIMAL);
(void)printf("%6s", buf);
}
int
md_query(char *name)
{
return (md_list(name, OPT_UNIT));
}
