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-rw-r--r--disk-utils/blockdev.c505
1 files changed, 505 insertions, 0 deletions
diff --git a/disk-utils/blockdev.c b/disk-utils/blockdev.c
new file mode 100644
index 0000000..5122460
--- /dev/null
+++ b/disk-utils/blockdev.c
@@ -0,0 +1,505 @@
+/*
+ * blockdev.c --- Do various simple block device ioctls from the command line
+ * aeb, 991028
+ */
+
+#include <stdio.h>
+#include <fcntl.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/ioctl.h>
+#include <errno.h>
+
+#include "c.h"
+#include "nls.h"
+#include "blkdev.h"
+#include "pathnames.h"
+#include "closestream.h"
+#include "sysfs.h"
+
+struct bdc {
+ long ioc; /* ioctl code */
+ const char *iocname; /* ioctl name (e.g. BLKROSET) */
+ long argval; /* default argument */
+
+ const char *name; /* --setfoo */
+ const char *argname; /* argument name or NULL */
+
+ const char *help;
+
+ int argtype;
+ int flags;
+};
+
+/* command flags */
+enum {
+ FL_NOPTR = (1 << 1), /* does not assume pointer (ARG_INT only)*/
+ FL_NORESULT = (1 << 2) /* does not return any data */
+};
+
+/* ioctl argument types */
+enum {
+ ARG_NONE,
+ ARG_USHRT,
+ ARG_INT,
+ ARG_UINT,
+ ARG_LONG,
+ ARG_ULONG,
+ ARG_LLONG,
+ ARG_ULLONG
+};
+
+#define IOCTL_ENTRY( io ) .ioc = io, .iocname = # io
+
+static const struct bdc bdcms[] =
+{
+ {
+ IOCTL_ENTRY(BLKROSET),
+ .name = "--setro",
+ .argtype = ARG_INT,
+ .argval = 1,
+ .flags = FL_NORESULT,
+ .help = N_("set read-only")
+ },{
+ IOCTL_ENTRY(BLKROSET),
+ .name = "--setrw",
+ .argtype = ARG_INT,
+ .argval = 0,
+ .flags = FL_NORESULT,
+ .help = N_("set read-write")
+ },{
+ IOCTL_ENTRY(BLKROGET),
+ .name = "--getro",
+ .argtype = ARG_INT,
+ .argval = -1,
+ .help = N_("get read-only")
+ },{
+ IOCTL_ENTRY(BLKDISCARDZEROES),
+ .name = "--getdiscardzeroes",
+ .argtype = ARG_UINT,
+ .argval = -1,
+ .help = N_("get discard zeroes support status")
+ },{
+ IOCTL_ENTRY(BLKSSZGET),
+ .name = "--getss",
+ .argtype = ARG_INT,
+ .argval = -1,
+ .help = N_("get logical block (sector) size")
+ },{
+ IOCTL_ENTRY(BLKPBSZGET),
+ .name = "--getpbsz",
+ .argtype = ARG_UINT,
+ .argval = -1,
+ .help = N_("get physical block (sector) size")
+ },{
+ IOCTL_ENTRY(BLKIOMIN),
+ .name = "--getiomin",
+ .argtype = ARG_UINT,
+ .argval = -1,
+ .help = N_("get minimum I/O size")
+ },{
+ IOCTL_ENTRY(BLKIOOPT),
+ .name = "--getioopt",
+ .argtype = ARG_UINT,
+ .argval = -1,
+ .help = N_("get optimal I/O size")
+ },{
+ IOCTL_ENTRY(BLKALIGNOFF),
+ .name = "--getalignoff",
+ .argtype = ARG_INT,
+ .argval = -1,
+ .help = N_("get alignment offset in bytes")
+ },{
+ IOCTL_ENTRY(BLKSECTGET),
+ .name = "--getmaxsect",
+ .argtype = ARG_USHRT,
+ .argval = -1,
+ .help = N_("get max sectors per request")
+ },{
+ IOCTL_ENTRY(BLKBSZGET),
+ .name = "--getbsz",
+ .argtype = ARG_INT,
+ .argval = -1,
+ .help = N_("get blocksize")
+ },{
+ IOCTL_ENTRY(BLKBSZSET),
+ .name = "--setbsz",
+ .argname = "<bytes>",
+ .argtype = ARG_INT,
+ .flags = FL_NORESULT,
+ .help = N_("set blocksize on file descriptor opening the block device")
+ },{
+ IOCTL_ENTRY(BLKGETSIZE),
+ .name = "--getsize",
+ .argtype = ARG_ULONG,
+ .argval = -1,
+ .help = N_("get 32-bit sector count (deprecated, use --getsz)")
+ },{
+ IOCTL_ENTRY(BLKGETSIZE64),
+ .name = "--getsize64",
+ .argtype = ARG_ULLONG,
+ .argval = -1,
+ .help = N_("get size in bytes")
+ },{
+ IOCTL_ENTRY(BLKRASET),
+ .name = "--setra",
+ .argname = "<sectors>",
+ .argtype = ARG_INT,
+ .flags = FL_NOPTR | FL_NORESULT,
+ .help = N_("set readahead")
+ },{
+ IOCTL_ENTRY(BLKRAGET),
+ .name = "--getra",
+ .argtype = ARG_LONG,
+ .argval = -1,
+ .help = N_("get readahead")
+ },{
+ IOCTL_ENTRY(BLKFRASET),
+ .name = "--setfra",
+ .argname = "<sectors>",
+ .argtype = ARG_INT,
+ .flags = FL_NOPTR | FL_NORESULT,
+ .help = N_("set filesystem readahead")
+ },{
+ IOCTL_ENTRY(BLKFRAGET),
+ .name = "--getfra",
+ .argtype = ARG_LONG,
+ .argval = -1,
+ .help = N_("get filesystem readahead")
+ },{
+ IOCTL_ENTRY(BLKFLSBUF),
+ .name = "--flushbufs",
+ .help = N_("flush buffers")
+ },{
+ IOCTL_ENTRY(BLKRRPART),
+ .name = "--rereadpt",
+ .help = N_("reread partition table")
+ }
+};
+
+static void __attribute__((__noreturn__)) usage(void)
+{
+ size_t i;
+
+ fputs(USAGE_HEADER, stdout);
+ printf(_(
+ " %1$s [-v|-q] commands devices\n"
+ " %1$s --report [devices]\n"
+ " %1$s -h|-V\n"
+ ), program_invocation_short_name);
+
+ fputs(USAGE_SEPARATOR, stdout);
+ puts( _("Call block device ioctls from the command line."));
+
+ fputs(USAGE_OPTIONS, stdout);
+ puts( _(" -q quiet mode"));
+ puts( _(" -v verbose mode"));
+ puts( _(" --report print report for specified (or all) devices"));
+ fputs(USAGE_SEPARATOR, stdout);
+ printf(USAGE_HELP_OPTIONS(16));
+
+ fputs(USAGE_SEPARATOR, stdout);
+ puts( _("Available commands:"));
+ printf(_(" %-25s get size in 512-byte sectors\n"), "--getsz");
+ for (i = 0; i < ARRAY_SIZE(bdcms); i++) {
+ if (bdcms[i].argname)
+ printf(" %s %-*s %s\n", bdcms[i].name,
+ (int)(24 - strlen(bdcms[i].name)),
+ bdcms[i].argname, _(bdcms[i].help));
+ else
+ printf(" %-25s %s\n", bdcms[i].name,
+ _(bdcms[i].help));
+ }
+
+ printf(USAGE_MAN_TAIL("blockdev(8)"));
+ exit(EXIT_SUCCESS);
+}
+
+static int find_cmd(char *s)
+{
+ size_t j;
+
+ for (j = 0; j < ARRAY_SIZE(bdcms); j++)
+ if (!strcmp(s, bdcms[j].name))
+ return j;
+ return -1;
+}
+
+static void do_commands(int fd, char **argv, int d);
+static void report_header(void);
+static void report_device(char *device, int quiet);
+static void report_all_devices(void);
+
+int main(int argc, char **argv)
+{
+ int fd, d, j, k;
+
+ setlocale(LC_ALL, "");
+ bindtextdomain(PACKAGE, LOCALEDIR);
+ textdomain(PACKAGE);
+ atexit(close_stdout);
+
+ if (argc < 2) {
+ warnx(_("not enough arguments"));
+ errtryhelp(EXIT_FAILURE);
+ }
+
+ /* -V not together with commands */
+ if (!strcmp(argv[1], "-V") || !strcmp(argv[1], "--version")) {
+ printf(UTIL_LINUX_VERSION);
+ return EXIT_SUCCESS;
+ }
+ if (!strcmp(argv[1], "-h") || !strcmp(argv[1], "--help"))
+ usage();
+
+ /* --report not together with other commands */
+ if (!strcmp(argv[1], "--report")) {
+ report_header();
+ if (argc > 2) {
+ for (d = 2; d < argc; d++)
+ report_device(argv[d], 0);
+ } else {
+ report_all_devices();
+ }
+ return EXIT_SUCCESS;
+ }
+
+ /* do each of the commands on each of the devices */
+ /* devices start after last command */
+ for (d = 1; d < argc; d++) {
+ j = find_cmd(argv[d]);
+ if (j >= 0) {
+ if (bdcms[j].argname)
+ d++;
+ continue;
+ }
+ if (!strcmp(argv[d], "--getsz"))
+ continue;
+ if (!strcmp(argv[d], "--")) {
+ d++;
+ break;
+ }
+ if (argv[d][0] != '-')
+ break;
+ }
+
+ if (d >= argc) {
+ warnx(_("no device specified"));
+ errtryhelp(EXIT_FAILURE);
+ }
+
+ for (k = d; k < argc; k++) {
+ fd = open(argv[k], O_RDONLY, 0);
+ if (fd < 0)
+ err(EXIT_FAILURE, _("cannot open %s"), argv[k]);
+ do_commands(fd, argv, d);
+ close(fd);
+ }
+ return EXIT_SUCCESS;
+}
+
+static void do_commands(int fd, char **argv, int d)
+{
+ int res, i, j;
+ int iarg = 0;
+ unsigned int uarg = 0;
+ unsigned short huarg = 0;
+ long larg = 0;
+ long long llarg = 0;
+ unsigned long lu = 0;
+ unsigned long long llu = 0;
+ int verbose = 0;
+
+ for (i = 1; i < d; i++) {
+ if (!strcmp(argv[i], "-v")) {
+ verbose = 1;
+ continue;
+ }
+ if (!strcmp(argv[i], "-q")) {
+ verbose = 0;
+ continue;
+ }
+
+ if (!strcmp(argv[i], "--getsz")) {
+ res = blkdev_get_sectors(fd, &llu);
+ if (res == 0)
+ printf("%lld\n", llu);
+ else
+ errx(EXIT_FAILURE,
+ _("could not get device size"));
+ continue;
+ }
+
+ j = find_cmd(argv[i]);
+ if (j == -1) {
+ warnx(_("Unknown command: %s"), argv[i]);
+ errtryhelp(EXIT_FAILURE);
+ }
+
+ switch (bdcms[j].argtype) {
+ default:
+ case ARG_NONE:
+ res = ioctl(fd, bdcms[j].ioc, 0);
+ break;
+ case ARG_USHRT:
+ huarg = bdcms[j].argval;
+ res = ioctl(fd, bdcms[j].ioc, &huarg);
+ break;
+ case ARG_INT:
+ if (bdcms[j].argname) {
+ if (i == d - 1) {
+ warnx(_("%s requires an argument"),
+ bdcms[j].name);
+ errtryhelp(EXIT_FAILURE);
+ }
+ iarg = atoi(argv[++i]);
+ } else
+ iarg = bdcms[j].argval;
+
+ res = bdcms[j].flags & FL_NOPTR ?
+ ioctl(fd, bdcms[j].ioc, iarg) :
+ ioctl(fd, bdcms[j].ioc, &iarg);
+ break;
+ case ARG_UINT:
+ uarg = bdcms[j].argval;
+ res = ioctl(fd, bdcms[j].ioc, &uarg);
+ break;
+ case ARG_LONG:
+ larg = bdcms[j].argval;
+ res = ioctl(fd, bdcms[j].ioc, &larg);
+ break;
+ case ARG_LLONG:
+ llarg = bdcms[j].argval;
+ res = ioctl(fd, bdcms[j].ioc, &llarg);
+ break;
+ case ARG_ULONG:
+ lu = bdcms[j].argval;
+ res = ioctl(fd, bdcms[j].ioc, &lu);
+ break;
+ case ARG_ULLONG:
+ llu = bdcms[j].argval;
+ res = ioctl(fd, bdcms[j].ioc, &llu);
+ break;
+ }
+
+ if (res == -1) {
+ warn(_("ioctl error on %s"), bdcms[j].iocname);
+ if (verbose)
+ printf(_("%s failed.\n"), _(bdcms[j].help));
+ exit(EXIT_FAILURE);
+ }
+
+ if (bdcms[j].argtype == ARG_NONE ||
+ (bdcms[j].flags & FL_NORESULT)) {
+ if (verbose)
+ printf(_("%s succeeded.\n"), _(bdcms[j].help));
+ continue;
+ }
+
+ if (verbose)
+ printf("%s: ", _(bdcms[j].help));
+
+ switch (bdcms[j].argtype) {
+ case ARG_USHRT:
+ printf("%hu\n", huarg);
+ break;
+ case ARG_INT:
+ printf("%d\n", iarg);
+ break;
+ case ARG_UINT:
+ printf("%u\n", uarg);
+ break;
+ case ARG_LONG:
+ printf("%ld\n", larg);
+ break;
+ case ARG_LLONG:
+ printf("%lld\n", llarg);
+ break;
+ case ARG_ULONG:
+ printf("%lu\n", lu);
+ break;
+ case ARG_ULLONG:
+ printf("%llu\n", llu);
+ break;
+ }
+ }
+}
+
+static void report_all_devices(void)
+{
+ FILE *procpt;
+ char line[200];
+ char ptname[200 + 1];
+ char device[210];
+ int ma, mi, sz;
+
+ procpt = fopen(_PATH_PROC_PARTITIONS, "r");
+ if (!procpt)
+ err(EXIT_FAILURE, _("cannot open %s"), _PATH_PROC_PARTITIONS);
+
+ while (fgets(line, sizeof(line), procpt)) {
+ if (sscanf(line, " %d %d %d %200[^\n ]",
+ &ma, &mi, &sz, ptname) != 4)
+ continue;
+
+ sprintf(device, "/dev/%s", ptname);
+ report_device(device, 1);
+ }
+
+ fclose(procpt);
+}
+
+static void report_device(char *device, int quiet)
+{
+ int fd;
+ int ro, ssz, bsz;
+ long ra;
+ unsigned long long bytes;
+ uint64_t start = 0;
+ struct stat st;
+
+ fd = open(device, O_RDONLY | O_NONBLOCK);
+ if (fd < 0) {
+ if (!quiet)
+ warn(_("cannot open %s"), device);
+ return;
+ }
+
+ ro = ssz = bsz = 0;
+ ra = 0;
+ if (fstat(fd, &st) == 0) {
+ dev_t disk;
+ struct path_cxt *pc;
+
+ pc = ul_new_sysfs_path(st.st_rdev, NULL, NULL);
+ if (pc &&
+ sysfs_blkdev_get_wholedisk(pc, NULL, 0, &disk) == 0 &&
+ disk != st.st_rdev) {
+
+ if (ul_path_read_u64(pc, &start, "start") != 0)
+ err(EXIT_FAILURE,
+ _("%s: failed to read partition start from sysfs"),
+ device);
+ }
+ ul_unref_path(pc);
+ }
+ if (ioctl(fd, BLKROGET, &ro) == 0 &&
+ ioctl(fd, BLKRAGET, &ra) == 0 &&
+ ioctl(fd, BLKSSZGET, &ssz) == 0 &&
+ ioctl(fd, BLKBSZGET, &bsz) == 0 &&
+ blkdev_get_size(fd, &bytes) == 0) {
+ printf("%s %5ld %5d %5d %10ju %15lld %s\n",
+ ro ? "ro" : "rw", ra, ssz, bsz, start, bytes, device);
+ } else {
+ if (!quiet)
+ warnx(_("ioctl error on %s"), device);
+ }
+
+ close(fd);
+}
+
+static void report_header(void)
+{
+ printf(_("RO RA SSZ BSZ StartSec Size Device\n"));
+}
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