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-rw-r--r--init/do_mounts.c219
1 files changed, 0 insertions, 219 deletions
diff --git a/init/do_mounts.c b/init/do_mounts.c
index 0b36a5f39ee8..780546a6cbfb 100644
--- a/init/do_mounts.c
+++ b/init/do_mounts.c
@@ -59,225 +59,6 @@ static int __init readwrite(char *str)
__setup("ro", readonly);
__setup("rw", readwrite);
-#ifdef CONFIG_BLOCK
-struct uuidcmp {
- const char *uuid;
- int len;
-};
-
-/**
- * match_dev_by_uuid - callback for finding a partition using its uuid
- * @dev: device passed in by the caller
- * @data: opaque pointer to the desired struct uuidcmp to match
- *
- * Returns 1 if the device matches, and 0 otherwise.
- */
-static int match_dev_by_uuid(struct device *dev, const void *data)
-{
- struct block_device *bdev = dev_to_bdev(dev);
- const struct uuidcmp *cmp = data;
-
- if (!bdev->bd_meta_info ||
- strncasecmp(cmp->uuid, bdev->bd_meta_info->uuid, cmp->len))
- return 0;
- return 1;
-}
-
-/**
- * devt_from_partuuid - looks up the dev_t of a partition by its UUID
- * @uuid_str: char array containing ascii UUID
- *
- * The function will return the first partition which contains a matching
- * UUID value in its partition_meta_info struct. This does not search
- * by filesystem UUIDs.
- *
- * If @uuid_str is followed by a "/PARTNROFF=%d", then the number will be
- * extracted and used as an offset from the partition identified by the UUID.
- *
- * Returns the matching dev_t on success or 0 on failure.
- */
-static int devt_from_partuuid(const char *uuid_str, dev_t *devt)
-{
- struct uuidcmp cmp;
- struct device *dev = NULL;
- int offset = 0;
- char *slash;
-
- cmp.uuid = uuid_str;
-
- slash = strchr(uuid_str, '/');
- /* Check for optional partition number offset attributes. */
- if (slash) {
- char c = 0;
-
- /* Explicitly fail on poor PARTUUID syntax. */
- if (sscanf(slash + 1, "PARTNROFF=%d%c", &offset, &c) != 1)
- goto out_invalid;
- cmp.len = slash - uuid_str;
- } else {
- cmp.len = strlen(uuid_str);
- }
-
- if (!cmp.len)
- goto out_invalid;
-
- dev = class_find_device(&block_class, NULL, &cmp, &match_dev_by_uuid);
- if (!dev)
- return -ENODEV;
-
- if (offset) {
- /*
- * Attempt to find the requested partition by adding an offset
- * to the partition number found by UUID.
- */
- *devt = part_devt(dev_to_disk(dev),
- dev_to_bdev(dev)->bd_partno + offset);
- } else {
- *devt = dev->devt;
- }
-
- put_device(dev);
- return 0;
-
-out_invalid:
- pr_err("VFS: PARTUUID= is invalid.\n"
- "Expected PARTUUID=<valid-uuid-id>[/PARTNROFF=%%d]\n");
- return -EINVAL;
-}
-
-/**
- * match_dev_by_label - callback for finding a partition using its label
- * @dev: device passed in by the caller
- * @data: opaque pointer to the label to match
- *
- * Returns 1 if the device matches, and 0 otherwise.
- */
-static int match_dev_by_label(struct device *dev, const void *data)
-{
- struct block_device *bdev = dev_to_bdev(dev);
- const char *label = data;
-
- if (!bdev->bd_meta_info || strcmp(label, bdev->bd_meta_info->volname))
- return 0;
- return 1;
-}
-
-static int devt_from_partlabel(const char *label, dev_t *devt)
-{
- struct device *dev;
-
- dev = class_find_device(&block_class, NULL, label, &match_dev_by_label);
- if (!dev)
- return -ENODEV;
- *devt = dev->devt;
- put_device(dev);
- return 0;
-}
-
-static int devt_from_devname(const char *name, dev_t *devt)
-{
- int part;
- char s[32];
- char *p;
-
- if (strlen(name) > 31)
- return -EINVAL;
- strcpy(s, name);
- for (p = s; *p; p++) {
- if (*p == '/')
- *p = '!';
- }
-
- *devt = blk_lookup_devt(s, 0);
- if (*devt)
- return 0;
-
- /*
- * Try non-existent, but valid partition, which may only exist after
- * opening the device, like partitioned md devices.
- */
- while (p > s && isdigit(p[-1]))
- p--;
- if (p == s || !*p || *p == '0')
- return -EINVAL;
-
- /* try disk name without <part number> */
- part = simple_strtoul(p, NULL, 10);
- *p = '\0';
- *devt = blk_lookup_devt(s, part);
- if (*devt)
- return 0;
-
- /* try disk name without p<part number> */
- if (p < s + 2 || !isdigit(p[-2]) || p[-1] != 'p')
- return -EINVAL;
- p[-1] = '\0';
- *devt = blk_lookup_devt(s, part);
- if (*devt)
- return 0;
- return -EINVAL;
-}
-
-static int devt_from_devnum(const char *name, dev_t *devt)
-{
- unsigned maj, min, offset;
- char *p, dummy;
-
- if (sscanf(name, "%u:%u%c", &maj, &min, &dummy) == 2 ||
- sscanf(name, "%u:%u:%u:%c", &maj, &min, &offset, &dummy) == 3) {
- *devt = MKDEV(maj, min);
- if (maj != MAJOR(*devt) || min != MINOR(*devt))
- return -EINVAL;
- } else {
- *devt = new_decode_dev(simple_strtoul(name, &p, 16));
- if (*p)
- return -EINVAL;
- }
-
- return 0;
-}
-
-/*
- * Convert a name into device number. We accept the following variants:
- *
- * 1) <hex_major><hex_minor> device number in hexadecimal represents itself
- * no leading 0x, for example b302.
- * 3) /dev/<disk_name> represents the device number of disk
- * 4) /dev/<disk_name><decimal> represents the device number
- * of partition - device number of disk plus the partition number
- * 5) /dev/<disk_name>p<decimal> - same as the above, that form is
- * used when disk name of partitioned disk ends on a digit.
- * 6) PARTUUID=00112233-4455-6677-8899-AABBCCDDEEFF representing the
- * unique id of a partition if the partition table provides it.
- * The UUID may be either an EFI/GPT UUID, or refer to an MSDOS
- * partition using the format SSSSSSSS-PP, where SSSSSSSS is a zero-
- * filled hex representation of the 32-bit "NT disk signature", and PP
- * is a zero-filled hex representation of the 1-based partition number.
- * 7) PARTUUID=<UUID>/PARTNROFF=<int> to select a partition in relation to
- * a partition with a known unique id.
- * 8) <major>:<minor> major and minor number of the device separated by
- * a colon.
- * 9) PARTLABEL=<name> with name being the GPT partition label.
- * MSDOS partitions do not support labels!
- *
- * If name doesn't have fall into the categories above, we return (0,0).
- * block_class is used to check if something is a disk name. If the disk
- * name contains slashes, the device name has them replaced with
- * bangs.
- */
-int early_lookup_bdev(const char *name, dev_t *devt)
-{
- if (strncmp(name, "PARTUUID=", 9) == 0)
- return devt_from_partuuid(name + 9, devt);
- if (strncmp(name, "PARTLABEL=", 10) == 0)
- return devt_from_partlabel(name + 10, devt);
- if (strncmp(name, "/dev/", 5) == 0)
- return devt_from_devname(name + 5, devt);
- return devt_from_devnum(name, devt);
-}
-EXPORT_SYMBOL_GPL(early_lookup_bdev);
-#endif
-
static int __init root_dev_setup(char *line)
{
strscpy(saved_root_name, line, sizeof(saved_root_name));
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-25 12:50:24 +0300