Adding upstream version 247.3.upstream/247.3upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 317 insertions, 0 deletions

diff --git a/src/udev/udev-builtin-blkid.c b/src/udev/udev-builtin-blkid.c
new file mode 100644
index 0000000..3f64548
--- /dev/null
+++ b/src/udev/udev-builtin-blkid.c
@@ -0,0 +1,317 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * probe disks for filesystems and partitions
+ *
+ * Copyright © 2011 Karel Zak <kzak@redhat.com>
+ */
+
+#include <errno.h>
+#include <fcntl.h>
+#include <getopt.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/stat.h>
+
+#include "sd-id128.h"
+
+#include "alloc-util.h"
+#include "blkid-util.h"
+#include "device-util.h"
+#include "efi-loader.h"
+#include "errno-util.h"
+#include "fd-util.h"
+#include "gpt.h"
+#include "parse-util.h"
+#include "string-util.h"
+#include "strxcpyx.h"
+#include "udev-builtin.h"
+
+static void print_property(sd_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(sd_device *dev, blkid_probe pr, bool test) {
+
+#if defined(GPT_ROOT_NATIVE) && 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_or_else(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)) {
+                        unsigned long long flags;
+
+                        flags = blkid_partition_get_flags(pp);
+                        if (flags & GPT_FLAG_NO_AUTO)
+                                continue;
+
+                        /* 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;
+
+        /* TODO: Return negative errno. */
+
+        if (fstat(blkid_probe_get_fd(pr), &st))
+                return -errno;
+
+        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(sd_device *dev, int argc, char *argv[], bool test) {
+        const char *devnode, *root_partition = NULL, *data, *name;
+        _cleanup_(blkid_free_probep) blkid_probe pr = NULL;
+        bool noraid = false, is_gpt = false;
+        _cleanup_close_ int fd = -1;
+        int64_t offset = 0;
+        int nvals, i, r;
+
+        static const struct option options[] = {
+                { "offset", required_argument, NULL, 'o' },
+                { "noraid", no_argument, NULL, 'R' },
+                {}
+        };
+
+        for (;;) {
+                int option;
+
+                option = getopt_long(argc, argv, "o:R", options, NULL);
+                if (option == -1)
+                        break;
+
+                switch (option) {
+                case 'o':
+                        r = safe_atoi64(optarg, &offset);
+                        if (r < 0)
+                                return log_device_error_errno(dev, r, "Failed to parse '%s' as an integer: %m", optarg);
+                        if (offset < 0)
+                                return log_device_error_errno(dev, SYNTHETIC_ERRNO(ERANGE), "Invalid offset %"PRIi64": %m", offset);
+                        break;
+                case 'R':
+                        noraid = true;
+                        break;
+                }
+        }
+
+        errno = 0;
+        pr = blkid_new_probe();
+        if (!pr)
+                return log_device_debug_errno(dev, errno > 0 ? errno : ENOMEM, "Failed to create blkid prober: %m");
+
+        blkid_probe_set_superblocks_flags(pr,
+                BLKID_SUBLKS_LABEL | BLKID_SUBLKS_UUID |
+                BLKID_SUBLKS_TYPE | BLKID_SUBLKS_SECTYPE |
+                BLKID_SUBLKS_USAGE | BLKID_SUBLKS_VERSION);
+
+        if (noraid)
+                blkid_probe_filter_superblocks_usage(pr, BLKID_FLTR_NOTIN, BLKID_USAGE_RAID);
+
+        r = sd_device_get_devname(dev, &devnode);
+        if (r < 0)
+                return log_device_debug_errno(dev, r, "Failed to get device name: %m");
+
+        fd = open(devnode, O_RDONLY|O_CLOEXEC|O_NONBLOCK);
+        if (fd < 0)
+                return log_device_debug_errno(dev, errno, "Failed to open block device %s: %m", devnode);
+
+        errno = 0;
+        r = blkid_probe_set_device(pr, fd, offset, 0);
+        if (r < 0)
+                return log_device_debug_errno(dev, errno > 0 ? errno : ENOMEM, "Failed to set device to blkid prober: %m");
+
+        log_device_debug(dev, "Probe %s with %sraid and offset=%"PRIi64, devnode, noraid ? "no" : "", offset);
+
+        r = probe_superblocks(pr);
+        if (r < 0)
+                return log_device_debug_errno(dev, r, "Failed to probe superblocks: %m");
+
+        /* If the device is a partition then its parent passed the root partition UUID to the device */
+        (void) sd_device_get_property_value(dev, "ID_PART_GPT_AUTO_ROOT_UUID", &root_partition);
+
+        errno = 0;
+        nvals = blkid_probe_numof_values(pr);
+        if (nvals < 0)
+                return log_device_debug_errno(dev, errno > 0 ? errno : ENOMEM, "Failed to get number of probed values: %m");
+
+        for (i = 0; i < nvals; i++) {
+                if (blkid_probe_get_value(pr, i, &name, &data, NULL) < 0)
+                        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 inherited from the 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);
+
+        return 0;
+}
+
+const UdevBuiltin udev_builtin_blkid = {
+        .name = "blkid",
+        .cmd = builtin_blkid,
+        .help = "Filesystem and partition probing",
+        .run_once = true,
+};