+++ /dev/null
-/*
- * probe disks for filesystems and partitions
- *
- * Copyright (C) 2011 Kay Sievers <kay@vrfy.org>
- * Copyright (C) 2011 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 <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <errno.h>
-#include <fcntl.h>
-#include <getopt.h>
-#include <sys/stat.h>
-#include <blkid/blkid.h>
-
-#include "sd-id128.h"
-#include "gpt.h"
-#include "efivars.h"
-#include "udev.h"
-
-static void print_property(struct udev_device *dev, bool test, const char *name, const char *value) {
- char s[256];
-
- s[0] = '\0';
-
- if (streq(name, "TYPE")) {
- udev_builtin_add_property(dev, test, "ID_FS_TYPE", value);
-
- } else if (streq(name, "USAGE")) {
- udev_builtin_add_property(dev, test, "ID_FS_USAGE", value);
-
- } else if (streq(name, "VERSION")) {
- udev_builtin_add_property(dev, test, "ID_FS_VERSION", value);
-
- } else if (streq(name, "UUID")) {
- blkid_safe_string(value, s, sizeof(s));
- udev_builtin_add_property(dev, test, "ID_FS_UUID", s);
- blkid_encode_string(value, s, sizeof(s));
- udev_builtin_add_property(dev, test, "ID_FS_UUID_ENC", s);
-
- } else if (streq(name, "UUID_SUB")) {
- blkid_safe_string(value, s, sizeof(s));
- udev_builtin_add_property(dev, test, "ID_FS_UUID_SUB", s);
- blkid_encode_string(value, s, sizeof(s));
- udev_builtin_add_property(dev, test, "ID_FS_UUID_SUB_ENC", s);
-
- } else if (streq(name, "LABEL")) {
- blkid_safe_string(value, s, sizeof(s));
- udev_builtin_add_property(dev, test, "ID_FS_LABEL", s);
- blkid_encode_string(value, s, sizeof(s));
- udev_builtin_add_property(dev, test, "ID_FS_LABEL_ENC", s);
-
- } else if (streq(name, "PTTYPE")) {
- udev_builtin_add_property(dev, test, "ID_PART_TABLE_TYPE", value);
-
- } else if (streq(name, "PTUUID")) {
- udev_builtin_add_property(dev, test, "ID_PART_TABLE_UUID", value);
-
- } else if (streq(name, "PART_ENTRY_NAME")) {
- blkid_encode_string(value, s, sizeof(s));
- udev_builtin_add_property(dev, test, "ID_PART_ENTRY_NAME", s);
-
- } else if (streq(name, "PART_ENTRY_TYPE")) {
- blkid_encode_string(value, s, sizeof(s));
- udev_builtin_add_property(dev, test, "ID_PART_ENTRY_TYPE", s);
-
- } else if (startswith(name, "PART_ENTRY_")) {
- strscpyl(s, sizeof(s), "ID_", name, NULL);
- udev_builtin_add_property(dev, test, s, value);
-
- } else if (streq(name, "SYSTEM_ID")) {
- blkid_encode_string(value, s, sizeof(s));
- udev_builtin_add_property(dev, test, "ID_FS_SYSTEM_ID", s);
-
- } else if (streq(name, "PUBLISHER_ID")) {
- blkid_encode_string(value, s, sizeof(s));
- udev_builtin_add_property(dev, test, "ID_FS_PUBLISHER_ID", s);
-
- } else if (streq(name, "APPLICATION_ID")) {
- blkid_encode_string(value, s, sizeof(s));
- udev_builtin_add_property(dev, test, "ID_FS_APPLICATION_ID", s);
-
- } else if (streq(name, "BOOT_SYSTEM_ID")) {
- blkid_encode_string(value, s, sizeof(s));
- udev_builtin_add_property(dev, test, "ID_FS_BOOT_SYSTEM_ID", s);
- }
-}
-
-static int find_gpt_root(struct udev_device *dev, blkid_probe pr, bool test) {
-
-#if defined(GPT_ROOT_NATIVE) && defined(ENABLE_EFI)
-
- _cleanup_free_ char *root_id = NULL;
- bool found_esp = false;
- blkid_partlist pl;
- int i, nvals, r;
-
- assert(pr);
-
- /* Iterate through the partitions on this disk, and see if the
- * EFI ESP we booted from is on it. If so, find the first root
- * disk, and add a property indicating its partition UUID. */
-
- errno = 0;
- pl = blkid_probe_get_partitions(pr);
- if (!pl)
- return errno ? -errno : -ENOMEM;
-
- nvals = blkid_partlist_numof_partitions(pl);
- for (i = 0; i < nvals; i++) {
- blkid_partition pp;
- const char *stype, *sid;
- sd_id128_t type;
-
- pp = blkid_partlist_get_partition(pl, i);
- if (!pp)
- continue;
-
- sid = blkid_partition_get_uuid(pp);
- if (!sid)
- continue;
-
- stype = blkid_partition_get_type_string(pp);
- if (!stype)
- continue;
-
- if (sd_id128_from_string(stype, &type) < 0)
- continue;
-
- if (sd_id128_equal(type, GPT_ESP)) {
- sd_id128_t id, esp;
-
- /* We found an ESP, let's see if it matches
- * the ESP we booted from. */
-
- if (sd_id128_from_string(sid, &id) < 0)
- continue;
-
- r = efi_loader_get_device_part_uuid(&esp);
- if (r < 0)
- return r;
-
- if (sd_id128_equal(id, esp))
- found_esp = true;
-
- } else if (sd_id128_equal(type, GPT_ROOT_NATIVE)) {
-
- /* We found a suitable root partition, let's
- * remember the first one. */
-
- if (!root_id) {
- root_id = strdup(sid);
- if (!root_id)
- return -ENOMEM;
- }
- }
- }
-
- /* We found the ESP on this disk, and also found a root
- * partition, nice! Let's export its UUID */
- if (found_esp && root_id)
- udev_builtin_add_property(dev, test, "ID_PART_GPT_AUTO_ROOT_UUID", root_id);
-#endif
-
- return 0;
-}
-
-static int probe_superblocks(blkid_probe pr) {
- struct stat st;
- int rc;
-
- if (fstat(blkid_probe_get_fd(pr), &st))
- return -1;
-
- blkid_probe_enable_partitions(pr, 1);
-
- if (!S_ISCHR(st.st_mode) &&
- blkid_probe_get_size(pr) <= 1024 * 1440 &&
- blkid_probe_is_wholedisk(pr)) {
- /*
- * check if the small disk is partitioned, if yes then
- * don't probe for filesystems.
- */
- blkid_probe_enable_superblocks(pr, 0);
-
- rc = blkid_do_fullprobe(pr);
- if (rc < 0)
- return rc; /* -1 = error, 1 = nothing, 0 = success */
-
- if (blkid_probe_lookup_value(pr, "PTTYPE", NULL, NULL) == 0)
- return 0; /* partition table detected */
- }
-
- blkid_probe_set_partitions_flags(pr, BLKID_PARTS_ENTRY_DETAILS);
- blkid_probe_enable_superblocks(pr, 1);
-
- return blkid_do_safeprobe(pr);
-}
-
-static int builtin_blkid(struct udev_device *dev, int argc, char *argv[], bool test) {
- const char *root_partition;
- int64_t offset = 0;
- bool noraid = false;
- _cleanup_close_ int fd = -1;
- blkid_probe pr;
- const char *data;
- const char *name;
- const char *prtype = NULL;
- int nvals;
- int i;
- int err = 0;
- bool is_gpt = false;
-
- static const struct option options[] = {
- { "offset", optional_argument, NULL, 'o' },
- { "noraid", no_argument, NULL, 'R' },
- {}
- };
-
- for (;;) {
- int option;
-
- option = getopt_long(argc, argv, "oR", options, NULL);
- if (option == -1)
- break;
-
- switch (option) {
- case 'o':
- offset = strtoull(optarg, NULL, 0);
- break;
- case 'R':
- noraid = true;
- break;
- }
- }
-
- pr = blkid_new_probe();
- if (!pr)
- return EXIT_FAILURE;
-
- blkid_probe_set_superblocks_flags(pr,
- BLKID_SUBLKS_LABEL | BLKID_SUBLKS_UUID |
- BLKID_SUBLKS_TYPE | BLKID_SUBLKS_SECTYPE |
- BLKID_SUBLKS_USAGE | BLKID_SUBLKS_VERSION |
- BLKID_SUBLKS_BADCSUM);
-
- if (noraid)
- blkid_probe_filter_superblocks_usage(pr, BLKID_FLTR_NOTIN, BLKID_USAGE_RAID);
-
- fd = open(udev_device_get_devnode(dev), O_RDONLY|O_CLOEXEC);
- if (fd < 0) {
- fprintf(stderr, "error: %s: %m\n", udev_device_get_devnode(dev));
- goto out;
- }
-
- err = blkid_probe_set_device(pr, fd, offset, 0);
- if (err < 0)
- goto out;
-
- log_debug("probe %s %sraid offset=%"PRIi64,
- udev_device_get_devnode(dev),
- noraid ? "no" : "", offset);
-
- err = probe_superblocks(pr);
- if (err < 0)
- goto out;
- if (blkid_probe_has_value(pr, "SBBADCSUM")) {
- if (!blkid_probe_lookup_value(pr, "TYPE", &prtype, NULL))
- log_warning("incorrect %s checksum on %s",
- prtype, udev_device_get_devnode(dev));
- else
- log_warning("incorrect checksum on %s",
- udev_device_get_devnode(dev));
- goto out;
- }
-
- /* If we are a partition then our parent passed on the root
- * partition UUID to us */
- root_partition = udev_device_get_property_value(dev, "ID_PART_GPT_AUTO_ROOT_UUID");
-
- nvals = blkid_probe_numof_values(pr);
- for (i = 0; i < nvals; i++) {
- if (blkid_probe_get_value(pr, i, &name, &data, NULL))
- continue;
-
- print_property(dev, test, name, data);
-
- /* Is this a disk with GPT partition table? */
- if (streq(name, "PTTYPE") && streq(data, "gpt"))
- is_gpt = true;
-
- /* Is this a partition that matches the root partition
- * property we inherited from our parent? */
- if (root_partition && streq(name, "PART_ENTRY_UUID") && streq(data, root_partition))
- udev_builtin_add_property(dev, test, "ID_PART_GPT_AUTO_ROOT", "1");
- }
-
- if (is_gpt)
- find_gpt_root(dev, pr, test);
-
- blkid_free_probe(pr);
-out:
- if (err < 0)
- return EXIT_FAILURE;
-
- return EXIT_SUCCESS;
-}
-
-const struct udev_builtin udev_builtin_blkid = {
- .name = "blkid",
- .cmd = builtin_blkid,
- .help = "Filesystem and partition probing",
- .run_once = true,
-};
~ianmdlvl / elogind.git / blobdiff