This patch adds:
- blkreset to issue Reset (Write Pointer) zone commands
- blkreport to retrieve drive zone information
Signed-off-by: Shaun Tancheff <shaun@xxxxxxxxxxxx>
---
Changes for v2:
- Configure changes to require linux/blkzoned.h [Linux v4.10]
- Cleanup of man pages
- Removed redundant fall-back for missing linux/blkzoned.h
- Removed unused report option (not yet implemented by Linux kernel.
- Change report length to be (maximum) number of zones returned.
---
.gitignore | 2 +
configure.ac | 11 +++
include/strutils.h | 2 +
lib/strutils.c | 7 +-
sys-utils/Makemodule.am | 17 ++++
sys-utils/blkreport.8 | 68 ++++++++++++++
sys-utils/blkreport.c | 245 ++++++++++++++++++++++++++++++++++++++++++++++++
sys-utils/blkreset.8 | 61 ++++++++++++
sys-utils/blkreset.c | 192 +++++++++++++++++++++++++++++++++++++
9 files changed, 600 insertions(+), 5 deletions(-)
create mode 100644 sys-utils/blkreport.8
create mode 100644 sys-utils/blkreport.c
create mode 100644 sys-utils/blkreset.8
create mode 100644 sys-utils/blkreset.c
diff --git a/.gitignore b/.gitignore
index 2658dcd..c1e983b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -62,6 +62,8 @@ update.log
/addpart
/agetty
/blkdiscard
+/blkreport
+/blkreset
/blkid
/blockdev
/cal
diff --git a/configure.ac b/configure.ac
index fa3e6c8..da721e4 100644
--- a/configure.ac
+++ b/configure.ac
@@ -276,6 +276,8 @@ AC_CHECK_HEADERS([security/pam_misc.h],
#endif
])
+AC_CHECK_HEADERS([linux/blkzoned.h])
+
AC_CHECK_HEADERS([security/openpam.h], [], [], [
#ifdef HAVE_SECURITY_PAM_APPL_H
#include <security/pam_appl.h>
@@ -288,6 +290,7 @@ AC_CHECK_HEADERS([langinfo.h],
dnl Convert some ac_cv_header_* variables to have_*
dnl
+have_linux_blkzoned_h=$ac_cv_header_linux_blkzoned_h
have_linux_btrfs_h=$ac_cv_header_linux_btrfs_h
have_linux_raw_h=$ac_cv_header_linux_raw_h
have_linux_securebits_h=$ac_cv_header_linux_securebits_h
@@ -1564,6 +1567,14 @@ UL_BUILD_INIT([blkdiscard], [check])
UL_REQUIRES_LINUX([blkdiscard])
AM_CONDITIONAL([BUILD_BLKDISCARD], [test "x$build_blkdiscard" = xyes])
+UL_BUILD_INIT([blkreport], [check])
+UL_REQUIRES_HAVE([blkreport], [linux_blkzoned_h], [linux/blkzoned.h header])
+AM_CONDITIONAL([BUILD_BLKREPORT], [test "x$build_blkreport" = xyes])
+
+UL_BUILD_INIT([blkreset], [check])
+UL_REQUIRES_HAVE([blkreset], [linux_blkzoned_h], [linux/blkzoned.h header])
+AM_CONDITIONAL([BUILD_BLKRESET], [test "x$build_blkreset" = xyes])
+
UL_BUILD_INIT([ldattach], [check])
UL_REQUIRES_LINUX([ldattach])
AM_CONDITIONAL([BUILD_LDATTACH], [test "x$build_ldattach" = xyes])
diff --git a/include/strutils.h b/include/strutils.h
index aa31fc9..9e13b2b 100644
--- a/include/strutils.h
+++ b/include/strutils.h
@@ -26,10 +26,12 @@ extern uint16_t strtox16_or_err(const char *str, const char *errmesg);
extern int32_t strtos32_or_err(const char *str, const char *errmesg);
extern uint32_t strtou32_or_err(const char *str, const char *errmesg);
extern uint32_t strtox32_or_err(const char *str, const char *errmesg);
+extern uint32_t _strtou32_or_err(const char *str, const char *errmesg, int base);
extern int64_t strtos64_or_err(const char *str, const char *errmesg);
extern uint64_t strtou64_or_err(const char *str, const char *errmesg);
extern uint64_t strtox64_or_err(const char *str, const char *errmesg);
+extern uint64_t _strtou64_or_err(const char *str, const char *errmesg, int base);
extern double strtod_or_err(const char *str, const char *errmesg);
diff --git a/lib/strutils.c b/lib/strutils.c
index d3daa36..2f6285d 100644
--- a/lib/strutils.c
+++ b/lib/strutils.c
@@ -264,9 +264,6 @@ char *strndup(const char *s, size_t n)
}
#endif
-static uint32_t _strtou32_or_err(const char *str, const char *errmesg, int base);
-static uint64_t _strtou64_or_err(const char *str, const char *errmesg, int base);
-
int16_t strtos16_or_err(const char *str, const char *errmesg)
{
int32_t num = strtos32_or_err(str, errmesg);
@@ -310,7 +307,7 @@ int32_t strtos32_or_err(const char *str, const char *errmesg)
return num;
}
-static uint32_t _strtou32_or_err(const char *str, const char *errmesg, int base)
+uint32_t _strtou32_or_err(const char *str, const char *errmesg, int base)
{
uint64_t num = _strtou64_or_err(str, errmesg, base);
@@ -352,7 +349,7 @@ err:
errx(STRTOXX_EXIT_CODE, "%s: '%s'", errmesg, str);
}
-static uint64_t _strtou64_or_err(const char *str, const char *errmesg, int base)
+uint64_t _strtou64_or_err(const char *str, const char *errmesg, int base)
{
uintmax_t num;
char *end = NULL;
diff --git a/sys-utils/Makemodule.am b/sys-utils/Makemodule.am
index be643c9..3b6097d 100644
--- a/sys-utils/Makemodule.am
+++ b/sys-utils/Makemodule.am
@@ -126,6 +126,23 @@ blkdiscard_SOURCES = sys-utils/blkdiscard.c lib/monotonic.c
blkdiscard_LDADD = $(LDADD) libcommon.la $(REALTIME_LIBS)
endif
+if BUILD_BLKREPORT
+sbin_PROGRAMS += blkreport
+dist_man_MANS += sys-utils/blkreport.8
+blkreport_SOURCES = sys-utils/blkreport.c
+blkreport_LDADD = $(LDADD) libcommon.la $(REALTIME_LIBS)
+endif
+
+if BUILD_BLKRESET
+sbin_PROGRAMS += blkreset
+dist_man_MANS += sys-utils/blkreset.8
+blkreset_SOURCES = sys-utils/blkreset.c
+blkreset_LDADD = $(LDADD) libcommon.la $(REALTIME_LIBS)
+if HAVE_UDEV
+blkreset_LDADD += -ludev
+endif
+endif
+
if BUILD_LDATTACH
usrsbin_exec_PROGRAMS += ldattach
dist_man_MANS += sys-utils/ldattach.8
diff --git a/sys-utils/blkreport.8 b/sys-utils/blkreport.8
new file mode 100644
index 0000000..2e65e39
--- /dev/null
+++ b/sys-utils/blkreport.8
@@ -0,0 +1,68 @@
+.TH BLKREPORT 5 "March 2016" "util-linux" "System Administration"
+.SH NAME
+blkreport \- report zones on a device
+.SH SYNOPSIS
+.B blkreport
+[options]
+.RB [ \-z
+.IR zone ]
+.RB [ \-c
+.IR count ]
+.I device
+.SH DESCRIPTION
+.B blkreport
+is used to report device zone information. This is useful for
+zoned devices that support the ZAC or ZBC command set.
+.PP
+By default,
+.B blkreport
+will report on up to 4k zones from the start of the block device.
+Options may be used to modify this behavior based on the starting zone or
+size of the report, as explained below.
+.PP
+The
+.I device
+argument is the pathname of the block device.
+.PP
+.SH OPTIONS
+The
+.I zone
+and
+.I count
+arguments may be followed by the multiplicative suffixes KiB (=1024),
+MiB (=1024*1024), and so on for GiB, TiB, PiB, EiB, ZiB and YiB (the "iB" is
+optional, e.g., "K" has the same meaning as "KiB") or the suffixes
+KB (=1000), MB (=1000*1000), and so on for GB, TB, PB, EB, ZB and YB.
+Additionally the common 0x prefix can be used to specify zone and length in hex.
+.TP
+.BR \-z , " \-\-zone \fIoffset", " \-\-offset \fIoffset"
+The starting zone of the report specified as a sector offset.
+The provided offset in sector units (512 bytes) should match the start of a zone.
+The default value is zero.
+.TP
+.BR \-c , " \-\-count \fIcount", " \-\-length \fIcount"
+The maximum number of zones to be returned by the report from the block device.
+Default is 4006, max is 65536
+.TP
+.BR \-v , " \-\-verbose"
+Display the number of zones returned in the report.
+.I offset
+and
+.IR length .
+.TP
+.BR \-V , " \-\-version"
+Display version information and exit.
+.TP
+.BR \-h , " \-\-help"
+Display help text and exit.
+.SH AUTHOR
+.MT shaun@xxxxxxxxxxxx
+Shaun Tancheff
+.ME
+.SH SEE ALSO
+.BR sg_rep_zones (8)
+.SH AVAILABILITY
+The blkreport command is part of the util-linux package and is available
+.UR ftp://\:ftp.kernel.org\:/pub\:/linux\:/utils\:/util-linux/
+Linux Kernel Archive
+.UE .
diff --git a/sys-utils/blkreport.c b/sys-utils/blkreport.c
new file mode 100644
index 0000000..46c0377
--- /dev/null
+++ b/sys-utils/blkreport.c
@@ -0,0 +1,245 @@
+/*
+ * blkreport.c -- request a zone report on part (or all) of the block device.
+ *
+ * Copyright (C) 2015,2016 Seagate Technology PLC
+ * Written by Shaun Tancheff <shaun.tancheff@xxxxxxxxxxx>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ * This program uses BLKREPORT ioctl to query zone information about part of
+ * or a whole block device, if the device supports it.
+ * You can specify range (start and length) to be queried.
+ */
+
+#include <string.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <stdint.h>
+#include <fcntl.h>
+#include <limits.h>
+#include <getopt.h>
+#include <time.h>
+
+#include <sys/ioctl.h>
+#include <sys/stat.h>
+#include <sys/time.h>
+#include <linux/fs.h>
+#include <linux/blkzoned.h>
+
+#include "nls.h"
+#include "strutils.h"
+#include "xalloc.h"
+#include "c.h"
+#include "closestream.h"
+#include "monotonic.h"
+
+static const char * type_text[] = {
+ "RESERVED",
+ "CONVENTIONAL",
+ "SEQ_WRITE_REQUIRED",
+ "SEQ_WRITE_PREFERRED",
+};
+
+#define ARRAY_COUNT(x) (sizeof((x))/sizeof((*x)))
+
+const char * condition_str[] = {
+ "cv", /* conventional zone */
+ "e0", /* empty */
+ "Oi", /* open implicit */
+ "Oe", /* open explicit */
+ "Cl", /* closed */
+ "x5", "x6", "x7", "x8", "x9", "xA", "xB", /* xN: reserved */
+ "ro", /* read only */
+ "fu", /* full */
+ "OL" /* offline */
+ };
+
+static const char * zone_condition_str(uint8_t cond)
+{
+ return condition_str[cond & 0x0f];
+}
+
+static void print_zones(struct blk_zone *info, uint32_t count)
+{
+ uint32_t iter;
+
+ printf(_("Zones returned: %u\n"), count);
+
+ for (iter = 0; iter < count; iter++ ) {
+ struct blk_zone * entry = &info[iter];
+ unsigned int type = entry->type;
+ uint64_t start = entry->start;
+ uint64_t wp = entry->wp;
+ uint8_t cond = entry->cond;
+ uint64_t len = entry->len;
+
+ if (!len)
+ break;
+
+ printf(_(" start: %9lx, len %6lx, wptr %6lx"
+ " reset:%u non-seq:%u, zcond:%2u(%s) [type: %u(%s)]\n"),
+ start, len, wp - start,
+ entry->reset, entry->non_seq,
+ cond, zone_condition_str(cond),
+ type, type_text[type]);
+ }
+}
+
+static int do_report(int fd, uint64_t lba, uint32_t len, int verbose)
+{
+ int rc = -4;
+ struct blk_zone_report *zi;
+
+ zi = xmalloc(sizeof(struct blk_zone_report) + (len * sizeof(struct blk_zone)));
+ zi->nr_zones = len;
+ zi->sector = lba; /* maybe shift 4Kn -> 512e */
+ rc = ioctl(fd, BLKREPORTZONE, zi);
+ if (rc != -1) {
+ if (verbose)
+ printf(_("Found %d zones\n"), zi->nr_zones);
+ print_zones(zi->zones, zi->nr_zones);
+ } else {
+ warn(_("ERR: %d -> %s"), errno, strerror(errno));
+ }
+ free(zi);
+
+ return rc;
+}
+
+static void __attribute__((__noreturn__)) usage(FILE *out)
+{
+ fputs(USAGE_HEADER, out);
+ fprintf(out,
+ _(" %s [options] <device>\n"), program_invocation_short_name);
+
+ fputs(USAGE_SEPARATOR, out);
+ fputs(_("Discard the content of sectors on a device.\n"), out);
+
+ fputs(USAGE_OPTIONS, out);
+ fputs(_(" -z, --zone <num> zone lba in 512 byte sectors\n"
+ " --offset <num> zone lba in 512 byte sectors\n"
+ " -c, --count <num> maximum number of zones in report\n"
+ " --length <num> maximum number of zones in report\n"
+ " -v, --verbose print aligned length and offset"),
+ out);
+ fputs(USAGE_SEPARATOR, out);
+ fputs(USAGE_HELP, out);
+ fputs(USAGE_VERSION, out);
+ fprintf(out, USAGE_MAN_TAIL("blkreport(8)"));
+ exit(out == stderr ? EXIT_FAILURE : EXIT_SUCCESS);
+}
+
+#define DEF_REPORT_LEN (1 << 12) /* 4k zones (256k kzalloc) */
+#define MAX_REPORT_LEN (1 << 16) /* 64k zones */
+
+int main(int argc, char **argv)
+{
+ char *path;
+ int c;
+ int fd;
+ int secsize;
+ uint64_t blksize;
+ struct stat sb;
+ int verbose = 0;
+ uint64_t offset = 0ul;
+ uint32_t length = DEF_REPORT_LEN;
+ static const struct option longopts[] = {
+ { "help", 0, 0, 'h' },
+ { "version", 0, 0, 'V' },
+ { "zone", 1, 0, 'z' }, /* starting LBA */
+ { "offset", 1, 0, 'z' }, /* alias for zone */
+ { "count", 1, 0, 'c' }, /* max #of zones (entries) for result */
+ { "length", 1, 0, 'c' }, /* max #of zones (entries) for result */
+ { "verbose", 0, 0, 'v' },
+ { NULL, 0, 0, 0 }
+ };
+ const char *options = "hVc:z:v";
+
+ setlocale(LC_ALL, "");
+ bindtextdomain(PACKAGE, LOCALEDIR);
+ textdomain(PACKAGE);
+ atexit(close_stdout);
+
+ while ((c = getopt_long(argc, argv, options, longopts, NULL)) != -1) {
+ switch(c) {
+ case 'h':
+ usage(stdout);
+ break;
+ case 'V':
+ printf(UTIL_LINUX_VERSION);
+ return EXIT_SUCCESS;
+ case 'c':
+ length = _strtou32_or_err(optarg,
+ _("failed to parse report count"), 0);
+ break;
+ case 'z':
+ offset = _strtou64_or_err(optarg,
+ _("failed to parse zone offset"), 0);
+ break;
+ case 'v':
+ verbose = 1;
+ break;
+ default:
+ usage(stderr);
+ break;
+ }
+ }
+
+ if (optind == argc)
+ errx(EXIT_FAILURE, _("no device specified"));
+
+ path = argv[optind++];
+
+ if (optind != argc) {
+ warnx(_("unexpected number of arguments"));
+ usage(stderr);
+ }
+
+ fd = open(path, O_RDONLY);
+ if (fd < 0)
+ err(EXIT_FAILURE, _("cannot open %s"), path);
+
+ if (fstat(fd, &sb) == -1)
+ err(EXIT_FAILURE, _("stat of %s failed"), path);
+ if (!S_ISBLK(sb.st_mode))
+ errx(EXIT_FAILURE, _("%s: not a block device"), path);
+
+ if (ioctl(fd, BLKGETSIZE64, &blksize))
+ err(EXIT_FAILURE, _("%s: BLKGETSIZE64 ioctl failed"), path);
+ if (ioctl(fd, BLKSSZGET, &secsize))
+ err(EXIT_FAILURE, _("%s: BLKSSZGET ioctl failed"), path);
+
+ /* check offset alignment to the sector size */
+ if (offset % secsize)
+ errx(EXIT_FAILURE, _("%s: offset %" PRIu64 " is not aligned "
+ "to sector size %i"), path, offset, secsize);
+
+ /* is the range end behind the end of the device ?*/
+ if (offset > blksize)
+ errx(EXIT_FAILURE, _("%s: offset is greater than device size"), path);
+
+ if (length < 1)
+ length = 1;
+ if (length > MAX_REPORT_LEN) {
+ length = MAX_REPORT_LEN;
+ warnx(_("limiting report to %u entries"), length);
+ }
+
+ if (do_report(fd, offset, length, verbose))
+ err(EXIT_FAILURE, _("%s: BLKREPORTZONE ioctl failed"), path);
+
+ close(fd);
+ return EXIT_SUCCESS;
+}
diff --git a/sys-utils/blkreset.8 b/sys-utils/blkreset.8
new file mode 100644
index 0000000..2c6c0a6
--- /dev/null
+++ b/sys-utils/blkreset.8
@@ -0,0 +1,61 @@
+.TH BLKRESET 5 "October 2016" "util-linux" "System Administration"
+.SH NAME
+blkreset \- Reset a range of zones
+.SH SYNOPSIS
+.B blkreset
+[options]
+.RB [ \-z
+.IR zone ]
+.RB [ \-c
+.IR count ]
+.SH DESCRIPTION
+.B blkreset
+is used to reset one or more zones. This is useful for
+zoned devices that support the ZAC or ZBC command set.
+Unlike
+.BR sg_reset_wp (8) ,
+this command operates from the block layer and can reset a range of zones.
+.PP
+By default,
+.B blkreset
+will operate on the zone at device logical sector 0. Options may be used to
+modify this behavior as well as specify the operation to be performed on
+the zone, as explained below.
+.PP
+The
+.I device
+argument is the pathname of the block device.
+.PP
+.SH OPTIONS
+The
+.I zone
+argument may be followed by the multiplicative suffixes KiB (=1024),
+MiB (=1024*1024), and so on for GiB, TiB, PiB, EiB, ZiB and YiB (the "iB" is
+optional, e.g., "K" has the same meaning as "KiB") or the suffixes
+KB (=1000), MB (=1000*1000), and so on for GB, TB, PB, EB, ZB and YB.
+Additionally the common 0x prefix can be used to specify zone and length in hex.
+.TP
+.BR \-z , " \-\-zone \fIoffset" , " \-\-offset \fIoffset"
+The starting zone to be operated upon specified as a sector offset.
+The provided offset in sector units (512 bytes) should match the start of a zone.
+The default value is zero.
+.TP
+.BR \-c , " \-\-count \fIcount" , " \-\-length \fIcount"
+The number of zones to be reset starting from offset. Default is 1 zone.
+.TP
+.BR \-V , " \-\-version"
+Display version information and exit.
+.TP
+.BR \-h , " \-\-help"
+Display help text and exit.
+.SH AUTHOR
+.MT shaun@xxxxxxxxxxxx
+Shaun Tancheff
+.ME
+.SH SEE ALSO
+.BR sg_reset_wp (8)
+.SH AVAILABILITY
+The blkreset command is part of the util-linux package and is available
+.UR ftp://\:ftp.kernel.org\:/pub\:/linux\:/utils\:/util-linux/
+Linux Kernel Archive
+.UE .
diff --git a/sys-utils/blkreset.c b/sys-utils/blkreset.c
new file mode 100644
index 0000000..217b112
--- /dev/null
+++ b/sys-utils/blkreset.c
@@ -0,0 +1,192 @@
+/*
+ * blkreset.c -- Reset the WP on a range of zones.
+ *
+ * Copyright (C) 2015,2016 Seagate Technology PLC
+ * Written by Shaun Tancheff <shaun.tancheff@xxxxxxxxxxx>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ * This program uses BLKREPORT ioctl to query zone information about part of
+ * or a whole block device, if the device supports it.
+ * You can specify range (start and length) to be queried.
+ */
+
+#include <string.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <stdint.h>
+#include <fcntl.h>
+#include <limits.h>
+#include <getopt.h>
+#include <time.h>
+#include <ctype.h>
+
+#include <sys/ioctl.h>
+#include <sys/stat.h>
+#include <sys/time.h>
+#include <linux/fs.h>
+#include <linux/major.h>
+#include <linux/blkzoned.h>
+
+#include "sysfs.h"
+#include "nls.h"
+#include "strutils.h"
+#include "c.h"
+#include "closestream.h"
+#include "monotonic.h"
+
+static unsigned long get_zone_size(const char *dname)
+{
+ struct sysfs_cxt cxt = UL_SYSFSCXT_EMPTY;
+ dev_t devno = sysfs_devname_to_devno(dname, NULL);
+ int major_no = major(devno);
+ int block_no = minor(devno) & ~0x0f;
+ uint64_t sz;
+
+ /*
+ * Mapping /dev/sdXn -> /sys/block/sdX to read the chunk_size entry.
+ * This method masks off the partition specified by the minor device
+ * component.
+ */
+ devno = makedev(major_no, block_no);
+ if (sysfs_init(&cxt, devno, NULL))
+ return 0;
+
+ if (sysfs_read_u64(&cxt, "queue/chunk_sectors", &sz) != 0)
+ warnx(_("%s: failed to read chunk size"), dname);
+
+ sysfs_deinit(&cxt);
+ return sz;
+}
+
+static void __attribute__((__noreturn__)) usage(FILE *out)
+{
+ fputs(USAGE_HEADER, out);
+ fprintf(out,
+ _(" %s [options] <device>\n"), program_invocation_short_name);
+
+ fputs(USAGE_SEPARATOR, out);
+ fputs(_("Discard the content of sectors on a device.\n"), out);
+
+ fputs(USAGE_OPTIONS, out);
+ fputs(_(" -z, --zone <num> lba of start of zone to act upon\n"
+ " -c, --count number of zones to reset (default = 1)"),
+ out);
+ fputs(USAGE_SEPARATOR, out);
+ fputs(USAGE_HELP, out);
+ fputs(USAGE_VERSION, out);
+ fprintf(out, USAGE_MAN_TAIL("blkreset(8)"));
+ exit(out == stderr ? EXIT_FAILURE : EXIT_SUCCESS);
+}
+
+
+int main(int argc, char **argv)
+{
+ char *path;
+ int c, fd;
+ uint64_t blksize;
+ uint64_t blksectors;
+ struct stat sb;
+ struct blk_zone_range za;
+ uint64_t zsector = 0ul;
+ uint64_t zlen = 0;
+ uint64_t zcount = 1;
+ unsigned long zsize;
+ int rc = 0;
+
+ static const struct option longopts[] = {
+ { "help", 0, 0, 'h' },
+ { "version", 0, 0, 'V' },
+ { "zone", 1, 0, 'z' },
+ { "count", 1, 0, 'c' },
+ { NULL, 0, 0, 0 }
+ };
+
+ setlocale(LC_ALL, "");
+ bindtextdomain(PACKAGE, LOCALEDIR);
+ textdomain(PACKAGE);
+ atexit(close_stdout);
+
+ while ((c = getopt_long(argc, argv, "hVz:c:", longopts, NULL)) != -1) {
+ switch(c) {
+ case 'h':
+ usage(stdout);
+ break;
+ case 'V':
+ printf(UTIL_LINUX_VERSION);
+ return EXIT_SUCCESS;
+ case 'z':
+ zsector = _strtou64_or_err(optarg,
+ _("failed to parse zone offset"), 0);
+ break;
+ case 'c':
+ zcount = _strtou64_or_err(optarg,
+ _("failed to parse number of zones"), 0);
+ break;
+ default:
+ usage(stderr);
+ break;
+ }
+ }
+
+ if (optind == argc)
+ errx(EXIT_FAILURE, _("no device specified"));
+
+ path = argv[optind++];
+
+ if (optind != argc) {
+ warnx(_("unexpected number of arguments"));
+ usage(stderr);
+ }
+
+ zsize = get_zone_size(path);
+ if (zsize == 0)
+ err(EXIT_FAILURE, _("%s: Unable to determine zone size"), path);
+
+ fd = open(path, O_WRONLY);
+ if (fd < 0)
+ err(EXIT_FAILURE, _("cannot open %s"), path);
+
+ if (fstat(fd, &sb) == -1)
+ err(EXIT_FAILURE, _("stat of %s failed"), path);
+ if (!S_ISBLK(sb.st_mode))
+ errx(EXIT_FAILURE, _("%s: not a block device"), path);
+
+ if (ioctl(fd, BLKGETSIZE64, &blksize))
+ err(EXIT_FAILURE, _("%s: BLKGETSIZE64 ioctl failed"), path);
+
+ blksectors = blksize << 9;
+
+ /* check offset alignment to the chunk size */
+ if (zsector & (zsize - 1))
+ errx(EXIT_FAILURE, _("%s: zone %" PRIu64 " is not aligned "
+ "to zone size %" PRIu64), path, zsector, zsize);
+ if (zsector > blksectors)
+ errx(EXIT_FAILURE, _("%s: zone %" PRIu64 " is too large "
+ "for device %" PRIu64), path, zsector, blksectors);
+
+ zlen = zcount * zsize;
+ if (zsector + zlen > blksectors)
+ zlen = blksectors - zsector;
+
+ za.sector = zsector;
+ za.nr_sectors = zlen;
+ rc = ioctl(fd, BLKRESETZONE, &za);
+ if (rc == -1)
+ err(EXIT_FAILURE, _("%s: BLKRESETZONE ioctl failed"), path);
+
+ close(fd);
+ return EXIT_SUCCESS;
+}
--
2.7.4
--
To unsubscribe from this list: send the line "unsubscribe util-linux" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
