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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 02:42:50 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 02:42:50 +0000 |
commit | 8cb83eee5a58b1fad74c34094ce3afb9e430b5a4 (patch) | |
tree | a9b2e7baeca1be40eb734371e3c8b11b02294497 /sys-utils/blkzone.c | |
parent | Initial commit. (diff) | |
download | util-linux-upstream/2.33.1.tar.xz util-linux-upstream/2.33.1.zip |
Adding upstream version 2.33.1.upstream/2.33.1upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | sys-utils/blkzone.c | 416 |
1 files changed, 416 insertions, 0 deletions
diff --git a/sys-utils/blkzone.c b/sys-utils/blkzone.c new file mode 100644 index 0000000..1dcbdf5 --- /dev/null +++ b/sys-utils/blkzone.c @@ -0,0 +1,416 @@ +/* + * 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 <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" + +struct blkzone_control; + +static int blkzone_report(struct blkzone_control *ctl); +static int blkzone_reset(struct blkzone_control *ctl); + +struct blkzone_command { + const char *name; + int (*handler)(struct blkzone_control *); + 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 verbose : 1; +}; + +static const struct blkzone_command commands[] = { + { "report", blkzone_report, N_("Report zone information about the given device") }, + { "reset", blkzone_reset, N_("Reset a range of zones.") } +}; + +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; +} + +/* + * 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) +{ + 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) { + nr_zones = 0; + break; + } + + for (i = 0; i < zi->nr_zones; i++) { + const struct blk_zone *entry = &zi->zones[i]; + 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) { + nr_zones = 0; + break; + } + + 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; + + } + + } + + free(zi); + close(fd); + + return 0; +} + +/* + * blkzone reset + */ +static int blkzone_reset(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); + + 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, BLKRESETZONE, &za) == -1) + err(EXIT_FAILURE, _("%s: BLKRESETZONE ioctl failed"), ctl->devname); + else if (ctl->verbose) + printf(_("%s: successfully reset in range from %" PRIu64 ", to %" PRIu64), + ctl->devname, + 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(_(" -v, --verbose display more details\n"), out); + fputs(USAGE_SEPARATOR, out); + printf(USAGE_HELP_OPTIONS(24)); + + printf(USAGE_MAN_TAIL("blkzone(8)")); + exit(EXIT_SUCCESS); +} + +int main(int argc, char **argv) +{ + int c; + struct blkzone_control ctl = { + .devname = NULL, + .offset = 0, + .count = 0, + .length = 0 + }; + + 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 */ + { "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); + atexit(close_stdout); + + 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:vV", longopts, NULL)) != -1) { + + err_exclusive_options(c, longopts, excl, excl_st); + + switch (c) { + case 'h': + usage(); + break; + 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 'v': + ctl.verbose = 1; + break; + case 'V': + printf(UTIL_LINUX_VERSION); + return 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; + +} |