451 lines
11 KiB
C
451 lines
11 KiB
C
/*
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* ----------------------------------------------------------------------------
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* "THE BEER-WARE LICENSE" (Revision 42):
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* <phk@FreeBSD.ORG> wrote this file. As long as you retain this notice you
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* can do whatever you want with this stuff. If we meet some day, and you think
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* this stuff is worth it, you can buy me a beer in return. Poul-Henning Kamp
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* ----------------------------------------------------------------------------
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*
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* $FreeBSD$
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*
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*/
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#include <sys/param.h>
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#include <sys/devicestat.h>
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#include <sys/ioctl.h>
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#include <sys/linker.h>
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#include <sys/mdioctl.h>
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#include <sys/module.h>
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#include <sys/resource.h>
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#include <sys/stat.h>
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#include <assert.h>
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#include <devstat.h>
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#include <err.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <inttypes.h>
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#include <libgeom.h>
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#include <libutil.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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static struct md_ioctl mdio;
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static enum {UNSET, ATTACH, DETACH, LIST} action = UNSET;
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static int nflag;
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static void usage(void);
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static int md_find(char *, const char *);
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static int md_query(char *name);
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static int md_list(char *units, int opt);
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static char *geom_config_get(struct gconf *g, char *name);
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static void md_prthumanval(char *length);
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#define OPT_VERBOSE 0x01
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#define OPT_UNIT 0x02
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#define OPT_DONE 0x04
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#define OPT_LIST 0x10
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#define CLASS_NAME_MD "MD"
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static void
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usage()
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{
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fprintf(stderr,
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"usage: mdconfig -a -t type [-n] [-o [no]option] ... [-f file]\n"
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" [-s size] [-S sectorsize] [-u unit]\n"
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" [-x sectors/track] [-y heads/cyl]\n"
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" mdconfig -d -u unit\n"
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" mdconfig -l [-n] [-u unit]\n");
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fprintf(stderr, "\t\ttype = {malloc, preload, vnode, swap}\n");
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fprintf(stderr, "\t\toption = {cluster, compress, reserve}\n");
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fprintf(stderr, "\t\tsize = %%d (512 byte blocks), %%db (B),\n");
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fprintf(stderr, "\t\t %%dk (kB), %%dm (MB), %%dg (GB) or\n");
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fprintf(stderr, "\t\t %%dt (TB)\n");
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exit(1);
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}
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int
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main(int argc, char **argv)
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{
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int ch, fd, i;
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char *p;
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int cmdline = 0;
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char *mdunit;
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bzero(&mdio, sizeof(mdio));
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mdio.md_file = malloc(PATH_MAX);
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if (mdio.md_file == NULL)
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err(1, "could not allocate memory");
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bzero(mdio.md_file, PATH_MAX);
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for (;;) {
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ch = getopt(argc, argv, "ab:df:lno:s:S:t:u:x:y:");
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if (ch == -1)
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break;
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switch (ch) {
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case 'a':
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if (cmdline != 0)
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usage();
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action = ATTACH;
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cmdline = 1;
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break;
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case 'd':
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if (cmdline != 0)
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usage();
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action = DETACH;
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mdio.md_options = MD_AUTOUNIT;
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cmdline = 3;
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break;
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case 'l':
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if (cmdline != 0)
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usage();
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action = LIST;
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mdio.md_options = MD_AUTOUNIT;
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cmdline = 3;
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break;
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case 'n':
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nflag = 1;
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break;
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case 't':
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if (cmdline != 1)
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usage();
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if (!strcmp(optarg, "malloc")) {
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mdio.md_type = MD_MALLOC;
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mdio.md_options = MD_AUTOUNIT | MD_COMPRESS;
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} else if (!strcmp(optarg, "preload")) {
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mdio.md_type = MD_PRELOAD;
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mdio.md_options = 0;
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} else if (!strcmp(optarg, "vnode")) {
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mdio.md_type = MD_VNODE;
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mdio.md_options = MD_CLUSTER | MD_AUTOUNIT | MD_COMPRESS;
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} else if (!strcmp(optarg, "swap")) {
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mdio.md_type = MD_SWAP;
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mdio.md_options = MD_CLUSTER | MD_AUTOUNIT | MD_COMPRESS;
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} else {
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usage();
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}
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cmdline=2;
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break;
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case 'f':
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if (cmdline == 0) {
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action = ATTACH;
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cmdline = 1;
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}
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if (cmdline == 1) {
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/* Imply ``-t vnode'' */
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mdio.md_type = MD_VNODE;
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mdio.md_options = MD_CLUSTER | MD_AUTOUNIT | MD_COMPRESS;
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cmdline = 2;
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}
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if (cmdline != 2)
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usage();
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if (realpath(optarg, mdio.md_file) == NULL) {
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err(1, "could not find full path for %s",
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optarg);
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}
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fd = open(mdio.md_file, O_RDONLY);
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if (fd < 0)
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err(1, "could not open %s", optarg);
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else if (mdio.md_mediasize == 0) {
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struct stat sb;
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if (fstat(fd, &sb) == -1)
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err(1, "could not stat %s", optarg);
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mdio.md_mediasize = sb.st_size;
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}
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close(fd);
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break;
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case 'o':
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if (cmdline != 2)
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usage();
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if (!strcmp(optarg, "async"))
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mdio.md_options |= MD_ASYNC;
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else if (!strcmp(optarg, "noasync"))
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mdio.md_options &= ~MD_ASYNC;
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else if (!strcmp(optarg, "cluster"))
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mdio.md_options |= MD_CLUSTER;
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else if (!strcmp(optarg, "nocluster"))
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mdio.md_options &= ~MD_CLUSTER;
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else if (!strcmp(optarg, "compress"))
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mdio.md_options |= MD_COMPRESS;
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else if (!strcmp(optarg, "nocompress"))
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mdio.md_options &= ~MD_COMPRESS;
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else if (!strcmp(optarg, "force"))
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mdio.md_options |= MD_FORCE;
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else if (!strcmp(optarg, "noforce"))
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mdio.md_options &= ~MD_FORCE;
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else if (!strcmp(optarg, "readonly"))
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mdio.md_options |= MD_READONLY;
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else if (!strcmp(optarg, "noreadonly"))
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mdio.md_options &= ~MD_READONLY;
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else if (!strcmp(optarg, "reserve"))
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mdio.md_options |= MD_RESERVE;
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else if (!strcmp(optarg, "noreserve"))
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mdio.md_options &= ~MD_RESERVE;
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else
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errx(1, "Unknown option: %s.", optarg);
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break;
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case 'S':
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if (cmdline != 2)
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usage();
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mdio.md_sectorsize = strtoul(optarg, &p, 0);
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break;
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case 's':
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if (cmdline == 0) {
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/* Imply ``-a'' */
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action = ATTACH;
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cmdline = 1;
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}
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if (cmdline == 1) {
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/* Imply ``-t swap'' */
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mdio.md_type = MD_SWAP;
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mdio.md_options = MD_CLUSTER | MD_AUTOUNIT | MD_COMPRESS;
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cmdline = 2;
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}
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if (cmdline != 2)
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usage();
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mdio.md_mediasize = (off_t)strtoumax(optarg, &p, 0);
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if (p == NULL || *p == '\0')
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mdio.md_mediasize *= DEV_BSIZE;
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else if (*p == 'b' || *p == 'B')
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; /* do nothing */
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else if (*p == 'k' || *p == 'K')
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mdio.md_mediasize <<= 10;
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else if (*p == 'm' || *p == 'M')
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mdio.md_mediasize <<= 20;
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else if (*p == 'g' || *p == 'G')
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mdio.md_mediasize <<= 30;
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else if (*p == 't' || *p == 'T') {
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mdio.md_mediasize <<= 30;
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mdio.md_mediasize <<= 10;
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} else
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errx(1, "Unknown suffix on -s argument");
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break;
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case 'u':
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if (cmdline != 2 && cmdline != 3)
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usage();
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if (!strncmp(optarg, "/dev/", 5))
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optarg += 5;
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if (!strncmp(optarg, MD_NAME, sizeof(MD_NAME) - 1))
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optarg += sizeof(MD_NAME) - 1;
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mdio.md_unit = strtoul(optarg, &p, 0);
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if (mdio.md_unit == (unsigned)ULONG_MAX || *p != '\0')
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errx(1, "bad unit: %s", optarg);
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mdunit = optarg;
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mdio.md_options &= ~MD_AUTOUNIT;
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break;
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case 'x':
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if (cmdline != 2)
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usage();
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mdio.md_fwsectors = strtoul(optarg, &p, 0);
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break;
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case 'y':
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if (cmdline != 2)
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usage();
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mdio.md_fwheads = strtoul(optarg, &p, 0);
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break;
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default:
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usage();
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}
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}
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mdio.md_version = MDIOVERSION;
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if (!kld_isloaded("g_md") && kld_load("geom_md") == -1)
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err(1, "failed to load geom_md module");
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fd = open("/dev/" MDCTL_NAME, O_RDWR, 0);
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if (fd < 0)
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err(1, "open(/dev/%s)", MDCTL_NAME);
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if (cmdline == 2
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&& (mdio.md_type == MD_MALLOC || mdio.md_type == MD_SWAP))
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if (mdio.md_mediasize == 0)
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errx(1, "must specify -s for -t malloc or -t swap");
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if (cmdline == 2 && mdio.md_type == MD_VNODE)
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if (mdio.md_file[0] == '\0')
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errx(1, "must specify -f for -t vnode");
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if (mdio.md_type == MD_VNODE &&
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(mdio.md_options & MD_READONLY) == 0) {
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if (access(mdio.md_file, W_OK) < 0 &&
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(errno == EACCES || errno == EPERM || errno == EROFS)) {
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fprintf(stderr,
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"WARNING: opening backing store: %s readonly\n",
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mdio.md_file);
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mdio.md_options |= MD_READONLY;
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}
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}
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if (action == LIST) {
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if (mdio.md_options & MD_AUTOUNIT) {
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/*
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* Listing all devices. This is why we pass NULL
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* together with OPT_LIST.
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*/
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md_list(NULL, OPT_LIST);
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} else {
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md_query(mdunit);
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}
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} else if (action == ATTACH) {
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if (cmdline < 2)
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usage();
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i = ioctl(fd, MDIOCATTACH, &mdio);
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if (i < 0)
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err(1, "ioctl(/dev/%s)", MDCTL_NAME);
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if (mdio.md_options & MD_AUTOUNIT)
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printf("%s%d\n", nflag ? "" : MD_NAME, mdio.md_unit);
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} else if (action == DETACH) {
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if (mdio.md_options & MD_AUTOUNIT)
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usage();
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i = ioctl(fd, MDIOCDETACH, &mdio);
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if (i < 0)
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err(1, "ioctl(/dev/%s)", MDCTL_NAME);
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} else
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usage();
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close (fd);
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return (0);
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}
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/*
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* Lists md(4) disks. Is used also as a query routine, since it handles XML
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* interface. 'units' can be NULL for listing memory disks. It might be
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* coma-separated string containing md(4) disk names. 'opt' distinguished
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* between list and query mode.
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*/
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static int
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md_list(char *units, int opt)
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{
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struct gmesh gm;
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struct gprovider *pp;
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struct gconf *gc;
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struct gident *gid;
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struct devstat *gsp;
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struct ggeom *gg;
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struct gclass *gcl;
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void *sq;
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int retcode;
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char *type, *file, *length;
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type = file = length = NULL;
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retcode = geom_gettree(&gm);
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if (retcode != 0)
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return (-1);
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retcode = geom_stats_open();
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if (retcode != 0)
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return (-1);
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sq = geom_stats_snapshot_get();
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if (sq == NULL)
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return (-1);
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while ((gsp = geom_stats_snapshot_next(sq)) != NULL) {
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gid = geom_lookupid(&gm, gsp->id);
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if (gid == NULL)
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continue;
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if (gid->lg_what == ISPROVIDER) {
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pp = gid->lg_ptr;
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gg = pp->lg_geom;
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gcl = gg->lg_class;
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if (strcmp(gcl->lg_name, CLASS_NAME_MD) != 0)
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continue;
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if ((opt & OPT_UNIT) && (units != NULL)) {
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retcode = md_find(units, pp->lg_name);
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if (retcode != 1)
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continue;
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}
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gc = &pp->lg_config;
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printf("%s", pp->lg_name);
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if (opt & OPT_VERBOSE || opt & OPT_UNIT) {
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type = geom_config_get(gc, "type");
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if (strcmp(type, "vnode") == 0)
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file = geom_config_get(gc, "file");
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length = geom_config_get(gc, "length");
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if (length == NULL)
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length = "<a>";
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printf("\t%s\t", type);
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md_prthumanval(length);
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if (file != NULL) {
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printf("\t%s", file);
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file = NULL;
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}
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}
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opt |= OPT_DONE;
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if (opt & OPT_LIST)
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printf(" ");
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else
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printf("\n");
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}
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}
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if ((opt & OPT_LIST) && (opt & OPT_DONE))
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printf("\n");
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/* XXX: Check if it's enough to clean everything. */
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geom_stats_snapshot_free(sq);
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return (-1);
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}
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/*
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* Returns value of 'name' from gconfig structure.
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*/
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static char *
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geom_config_get(struct gconf *g, char *name)
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{
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struct gconfig *gce;
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LIST_FOREACH(gce, g, lg_config) {
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if (strcmp(gce->lg_name, name) == 0)
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return (gce->lg_val);
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}
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return (NULL);
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}
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/*
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* List is comma separated list of MD disks. name is a
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* device name we look for. Returns 1 if found and 0
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* otherwise.
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*/
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static int
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md_find(char *list, const char *name)
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{
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int ret;
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char num[16];
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char *ptr, *p, *u;
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ret = 0;
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ptr = strdup(list);
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if (ptr == NULL)
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return (-1);
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for (p = ptr; (u = strsep(&p, ",")) != NULL;) {
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if (strncmp(u, "/dev/", 5) == 0)
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u += 5;
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/* Just in case user specified number instead of full name */
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snprintf(num, sizeof(num), "md%s", u);
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if (strcmp(u, name) == 0 || strcmp(num, name) == 0) {
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ret = 1;
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break;
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}
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}
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free(ptr);
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return (ret);
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}
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static void
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md_prthumanval(char *length)
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{
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char buf[6];
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uint64_t bytes;
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char *endptr;
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bytes = strtoul(length, &endptr, 10);
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if (bytes == (unsigned)ULONG_MAX || *endptr != '\0')
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return;
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humanize_number(buf, sizeof(buf) - (bytes < 0 ? 0 : 1),
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bytes, "", HN_AUTOSCALE, HN_B | HN_NOSPACE | HN_DECIMAL);
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(void)printf("%6s", buf);
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}
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int
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md_query(char *name)
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{
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return (md_list(name, OPT_UNIT));
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}
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