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-rw-r--r--sys-utils/blkzone.c506
1 files changed, 506 insertions, 0 deletions
diff --git a/sys-utils/blkzone.c b/sys-utils/blkzone.c
new file mode 100644
index 0000000..04e2660
--- /dev/null
+++ b/sys-utils/blkzone.c
@@ -0,0 +1,506 @@
+/*
+ * blkzone.c -- the block device zone commands
+ *
+ * Copyright (C) 2015,2016 Seagate Technology PLC
+ * Written by Shaun Tancheff <shaun.tancheff@seagate.com>
+ *
+ * Copyright (C) 2017 Karel Zak <kzak@redhat.com>
+ *
+ * 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/>.
+ */
+#include <string.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <stdint.h>
+#include <stdbool.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 "blkdev.h"
+#include "sysfs.h"
+#include "optutils.h"
+
+/*
+ * These ioctls are defined in linux/blkzoned.h starting with kernel 5.5.
+ */
+#ifndef BLKOPENZONE
+#define BLKOPENZONE _IOW(0x12, 134, struct blk_zone_range)
+#endif
+#ifndef BLKCLOSEZONE
+#define BLKCLOSEZONE _IOW(0x12, 135, struct blk_zone_range)
+#endif
+#ifndef BLKFINISHZONE
+#define BLKFINISHZONE _IOW(0x12, 136, struct blk_zone_range)
+#endif
+
+struct blkzone_control;
+
+static int blkzone_report(struct blkzone_control *ctl);
+static int blkzone_action(struct blkzone_control *ctl);
+
+struct blkzone_command {
+ const char *name;
+ int (*handler)(struct blkzone_control *);
+ unsigned long ioctl_cmd;
+ const char *ioctl_name;
+ const char *help;
+};
+
+struct blkzone_control {
+ const char *devname;
+ const struct blkzone_command *command;
+
+ uint64_t total_sectors;
+ int secsize;
+
+ uint64_t offset;
+ uint64_t length;
+ uint32_t count;
+
+ unsigned int force : 1;
+ unsigned int verbose : 1;
+};
+
+static const struct blkzone_command commands[] = {
+ {
+ .name = "report",
+ .handler = blkzone_report,
+ .help = N_("Report zone information about the given device")
+ },{
+ .name = "capacity",
+ .handler = blkzone_report,
+ .help = N_("Report sum of zone capacities for the given device")
+ },{
+ .name = "reset",
+ .handler = blkzone_action,
+ .ioctl_cmd = BLKRESETZONE,
+ .ioctl_name = "BLKRESETZONE",
+ .help = N_("Reset a range of zones.")
+ },{
+ .name = "open",
+ .handler = blkzone_action,
+ .ioctl_cmd = BLKOPENZONE,
+ .ioctl_name = "BLKOPENZONE",
+ .help = N_("Open a range of zones.")
+ },{
+ .name = "close",
+ .handler = blkzone_action,
+ .ioctl_cmd = BLKCLOSEZONE,
+ .ioctl_name = "BLKCLOSEZONE",
+ .help = N_("Close a range of zones.")
+ },{
+ .name = "finish",
+ .handler = blkzone_action,
+ .ioctl_cmd = BLKFINISHZONE,
+ .ioctl_name = "BLKFINISHZONE",
+ .help = N_("Set a range of zones to Full.")
+ }
+};
+
+static const struct blkzone_command *name_to_command(const char *name)
+{
+ size_t i;
+
+ for (i = 0; i < ARRAY_SIZE(commands); i++) {
+ if (strcmp(commands[i].name, name) == 0)
+ return &commands[i];
+ }
+
+ return NULL;
+}
+
+static int init_device(struct blkzone_control *ctl, int mode)
+{
+ struct stat sb;
+ int fd;
+
+ fd = open(ctl->devname, mode);
+ if (fd < 0)
+ err(EXIT_FAILURE, _("cannot open %s"), ctl->devname);
+
+ if (fstat(fd, &sb) == -1)
+ err(EXIT_FAILURE, _("stat of %s failed"), ctl->devname);
+ if (!S_ISBLK(sb.st_mode))
+ errx(EXIT_FAILURE, _("%s: not a block device"), ctl->devname);
+
+ if (blkdev_get_sectors(fd, (unsigned long long *) &ctl->total_sectors))
+ err(EXIT_FAILURE, _("%s: blkdev_get_sectors ioctl failed"), ctl->devname);
+
+ if (blkdev_get_sector_size(fd, &ctl->secsize))
+ err(EXIT_FAILURE, _("%s: BLKSSZGET ioctl failed"), ctl->devname);
+
+ return fd;
+}
+
+/*
+ * Get the device zone size indicated by chunk sectors).
+ */
+static unsigned long blkdev_chunk_sectors(const char *dname)
+{
+ struct path_cxt *pc = NULL;
+ dev_t devno = sysfs_devname_to_devno(dname);
+ dev_t disk;
+ uint64_t sz = 0;
+ int rc;
+
+ /*
+ * Mapping /dev/sdXn -> /sys/block/sdX to read the chunk_size entry.
+ * This method masks off the partition specified by the minor device
+ * component.
+ */
+ pc = ul_new_sysfs_path(devno, NULL, NULL);
+ if (!pc)
+ return 0;
+
+ rc = sysfs_blkdev_get_wholedisk(pc, NULL, 0, &disk);
+ if (rc != 0)
+ goto done;
+
+ /* if @pc is not while-disk device, switch to disk */
+ if (devno != disk) {
+ rc = sysfs_blkdev_init_path(pc, disk, NULL);
+ if (rc != 0)
+ goto done;
+ }
+
+ rc = ul_path_read_u64(pc, &sz, "queue/chunk_sectors");
+done:
+ ul_unref_path(pc);
+ return rc == 0 ? sz : 0;
+}
+
+#if HAVE_DECL_BLK_ZONE_REP_CAPACITY
+#define has_zone_capacity(zi) ((zi)->flags & BLK_ZONE_REP_CAPACITY)
+#define zone_capacity(z) (z)->capacity
+#else
+#define has_zone_capacity(zi) (false)
+#define zone_capacity(z) (z)->len
+#endif
+
+/*
+ * blkzone report
+ */
+#define DEF_REPORT_LEN (1U << 12) /* 4k zones per report (256k kzalloc) */
+
+static const char *type_text[] = {
+ "RESERVED",
+ "CONVENTIONAL",
+ "SEQ_WRITE_REQUIRED",
+ "SEQ_WRITE_PREFERRED",
+};
+
+static const char *condition_str[] = {
+ "nw", /* Not write pointer */
+ "em", /* Empty */
+ "oi", /* Implicitly opened */
+ "oe", /* Explicitly opened */
+ "cl", /* Closed */
+ "x5", "x6", "x7", "x8", "x9", "xA", "xB", "xC", /* xN: reserved */
+ "ro", /* Read only */
+ "fu", /* Full */
+ "of" /* Offline */
+};
+
+static int blkzone_report(struct blkzone_control *ctl)
+{
+ bool only_capacity_sum = !strcmp(ctl->command->name, "capacity");
+ uint64_t capacity_sum = 0;
+ struct blk_zone_report *zi;
+ unsigned long zonesize;
+ uint32_t i, nr_zones;
+ int fd;
+
+ fd = init_device(ctl, O_RDONLY);
+
+ if (ctl->offset >= ctl->total_sectors)
+ errx(EXIT_FAILURE,
+ _("%s: offset is greater than or equal to device size"), ctl->devname);
+
+ zonesize = blkdev_chunk_sectors(ctl->devname);
+ if (!zonesize)
+ errx(EXIT_FAILURE, _("%s: unable to determine zone size"), ctl->devname);
+
+ if (ctl->count)
+ nr_zones = ctl->count;
+ else if (ctl->length)
+ nr_zones = (ctl->length + zonesize - 1) / zonesize;
+ else
+ nr_zones = 1 + (ctl->total_sectors - ctl->offset) / zonesize;
+
+ zi = xmalloc(sizeof(struct blk_zone_report) +
+ (DEF_REPORT_LEN * sizeof(struct blk_zone)));
+
+ while (nr_zones && ctl->offset < ctl->total_sectors) {
+
+ zi->nr_zones = min(nr_zones, DEF_REPORT_LEN);
+ zi->sector = ctl->offset;
+
+ if (ioctl(fd, BLKREPORTZONE, zi) == -1)
+ err(EXIT_FAILURE, _("%s: BLKREPORTZONE ioctl failed"), ctl->devname);
+
+ if (ctl->verbose)
+ printf(_("Found %d zones from 0x%"PRIx64"\n"),
+ zi->nr_zones, ctl->offset);
+
+ if (!zi->nr_zones)
+ break;
+
+ for (i = 0; i < zi->nr_zones; i++) {
+/*
+ * blk_zone_report hasn't been packed since https://github.com/torvalds/linux/commit/b3e7e7d2d668de0102264302a4d10dd9d4438a42
+ * was merged. See https://github.com/util-linux/util-linux/issues/1083
+ */
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Waddress-of-packed-member"
+ const struct blk_zone *entry = &zi->zones[i];
+#pragma GCC diagnostic pop
+ 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;
+ uint64_t cap;
+
+ if (!len) {
+ nr_zones = 0;
+ break;
+ }
+
+ if (has_zone_capacity(zi))
+ cap = zone_capacity(entry);
+ else
+ cap = entry->len;
+
+ if (only_capacity_sum) {
+ capacity_sum += cap;
+ } else if (has_zone_capacity(zi)) {
+ printf(_(" start: 0x%09"PRIx64", len 0x%06"PRIx64
+ ", cap 0x%06"PRIx64", wptr 0x%06"PRIx64
+ " reset:%u non-seq:%u, zcond:%2u(%s) [type: %u(%s)]\n"),
+ start, len, cap, (type == 0x1) ? 0 : wp - start,
+ entry->reset, entry->non_seq,
+ cond, condition_str[cond & (ARRAY_SIZE(condition_str) - 1)],
+ type, type_text[type]);
+ } else {
+ printf(_(" start: 0x%09"PRIx64", len 0x%06"PRIx64
+ ", wptr 0x%06"PRIx64
+ " reset:%u non-seq:%u, zcond:%2u(%s) [type: %u(%s)]\n"),
+ start, len, (type == 0x1) ? 0 : wp - start,
+ entry->reset, entry->non_seq,
+ cond, condition_str[cond & (ARRAY_SIZE(condition_str) - 1)],
+ type, type_text[type]);
+ }
+
+ nr_zones--;
+ ctl->offset = start + len;
+ }
+
+ }
+
+ if (only_capacity_sum)
+ printf(_("0x%09"PRIx64"\n"), capacity_sum);
+
+ free(zi);
+ close(fd);
+
+ return 0;
+}
+
+/*
+ * blkzone reset, open, close, and finish.
+ */
+static int blkzone_action(struct blkzone_control *ctl)
+{
+ struct blk_zone_range za = { .sector = 0 };
+ unsigned long zonesize;
+ uint64_t zlen;
+ int fd;
+
+ zonesize = blkdev_chunk_sectors(ctl->devname);
+ if (!zonesize)
+ errx(EXIT_FAILURE, _("%s: unable to determine zone size"), ctl->devname);
+
+ fd = init_device(ctl, O_WRONLY | (ctl->force ? 0 : O_EXCL));
+
+ if (ctl->offset & (zonesize - 1))
+ errx(EXIT_FAILURE, _("%s: offset %" PRIu64 " is not aligned "
+ "to zone size %lu"),
+ ctl->devname, ctl->offset, zonesize);
+
+ if (ctl->offset > ctl->total_sectors)
+ errx(EXIT_FAILURE, _("%s: offset is greater than device size"), ctl->devname);
+
+ if (ctl->count)
+ zlen = ctl->count * zonesize;
+ else if (ctl->length)
+ zlen = ctl->length;
+ else
+ zlen = ctl->total_sectors;
+ if (ctl->offset + zlen > ctl->total_sectors)
+ zlen = ctl->total_sectors - ctl->offset;
+
+ if (ctl->length &&
+ (zlen & (zonesize - 1)) &&
+ ctl->offset + zlen != ctl->total_sectors)
+ errx(EXIT_FAILURE, _("%s: number of sectors %" PRIu64 " is not aligned "
+ "to zone size %lu"),
+ ctl->devname, ctl->length, zonesize);
+
+ za.sector = ctl->offset;
+ za.nr_sectors = zlen;
+
+ if (ioctl(fd, ctl->command->ioctl_cmd, &za) == -1)
+ err(EXIT_FAILURE, _("%s: %s ioctl failed"),
+ ctl->devname, ctl->command->ioctl_name);
+ else if (ctl->verbose)
+ printf(_("%s: successful %s of zones in range from %" PRIu64 ", to %" PRIu64),
+ ctl->devname,
+ ctl->command->name,
+ ctl->offset,
+ ctl->offset + zlen);
+ close(fd);
+ return 0;
+}
+
+static void __attribute__((__noreturn__)) usage(void)
+{
+ FILE *out = stdout;
+ size_t i;
+
+ fputs(USAGE_HEADER, out);
+ fprintf(out, _(" %s <command> [options] <device>\n"), program_invocation_short_name);
+
+ fputs(USAGE_SEPARATOR, out);
+ fputs(_("Run zone command on the given block device.\n"), out);
+
+ fputs(USAGE_COMMANDS, out);
+ for (i = 0; i < ARRAY_SIZE(commands); i++)
+ fprintf(out, " %-11s %s\n", commands[i].name, _(commands[i].help));
+
+ fputs(USAGE_OPTIONS, out);
+ fputs(_(" -o, --offset <sector> start sector of zone to act (in 512-byte sectors)\n"), out);
+ fputs(_(" -l, --length <sectors> maximum sectors to act (in 512-byte sectors)\n"), out);
+ fputs(_(" -c, --count <number> maximum number of zones\n"), out);
+ fputs(_(" -f, --force enforce on block devices used by the system\n"), out);
+ fputs(_(" -v, --verbose display more details\n"), out);
+ fputs(USAGE_SEPARATOR, out);
+ printf(USAGE_HELP_OPTIONS(24));
+
+ fputs(USAGE_ARGUMENTS, out);
+ printf(USAGE_ARG_SIZE(_("<sector> and <sectors>")));
+
+ printf(USAGE_MAN_TAIL("blkzone(8)"));
+ exit(EXIT_SUCCESS);
+}
+
+int main(int argc, char **argv)
+{
+ int c;
+ struct blkzone_control ctl = {
+ .devname = NULL
+ };
+
+ static const struct option longopts[] = {
+ { "help", no_argument, NULL, 'h' },
+ { "count", required_argument, NULL, 'c' }, /* max #of zones to operate on */
+ { "length", required_argument, NULL, 'l' }, /* max of sectors to operate on */
+ { "offset", required_argument, NULL, 'o' }, /* starting LBA */
+ { "force", no_argument, NULL, 'f' },
+ { "verbose", no_argument, NULL, 'v' },
+ { "version", no_argument, NULL, 'V' },
+ { NULL, 0, NULL, 0 }
+ };
+ static const ul_excl_t excl[] = { /* rows and cols in ASCII order */
+ { 'c', 'l' },
+ { 0 }
+ };
+ int excl_st[ARRAY_SIZE(excl)] = UL_EXCL_STATUS_INIT;
+
+
+ setlocale(LC_ALL, "");
+ bindtextdomain(PACKAGE, LOCALEDIR);
+ textdomain(PACKAGE);
+ close_stdout_atexit();
+
+ if (argc >= 2 && *argv[1] != '-') {
+ ctl.command = name_to_command(argv[1]);
+ if (!ctl.command)
+ errx(EXIT_FAILURE, _("%s is not valid command name"), argv[1]);
+ argv++;
+ argc--;
+ }
+
+ while ((c = getopt_long(argc, argv, "hc:l:o:fvV", longopts, NULL)) != -1) {
+
+ err_exclusive_options(c, longopts, excl, excl_st);
+
+ switch (c) {
+ case 'c':
+ ctl.count = strtou32_or_err(optarg,
+ _("failed to parse number of zones"));
+ break;
+ case 'l':
+ ctl.length = strtosize_or_err(optarg,
+ _("failed to parse number of sectors"));
+ break;
+ case 'o':
+ ctl.offset = strtosize_or_err(optarg,
+ _("failed to parse zone offset"));
+ break;
+ case 'f':
+ ctl.force = 1;
+ break;
+ case 'v':
+ ctl.verbose = 1;
+ break;
+
+ case 'h':
+ usage();
+ case 'V':
+ print_version(EXIT_SUCCESS);
+ default:
+ errtryhelp(EXIT_FAILURE);
+ }
+ }
+
+ if (!ctl.command)
+ errx(EXIT_FAILURE, _("no command specified"));
+
+ if (optind == argc)
+ errx(EXIT_FAILURE, _("no device specified"));
+ ctl.devname = argv[optind++];
+
+ if (optind != argc)
+ errx(EXIT_FAILURE,_("unexpected number of arguments"));
+
+ if (ctl.command->handler(&ctl) < 0)
+ return EXIT_FAILURE;
+
+ return EXIT_SUCCESS;
+
+}
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