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authorFabio Massimo Di Nitto <fabbione@ubuntu.com>2007-02-10 23:50:00 -0800
committerDavid S. Miller <davem@davemloft.net>2007-02-10 23:50:00 -0800
commitd18d7682c18b617f523df6beea5ea0bd396ed0bd (patch)
tree8e005fee2e13134e9ebdd1a3b71ef72b84351b19 /fs
parent66efc5a7e3061c3597ac43a8bb1026488d57e66b (diff)
[PARTITION]: Add whole_disk attribute.
Some partitioning systems create special partitions that span the entire disk. One example are Sun partitions, and this whole-disk partition exists to tell the firmware the extent of the entire device so it can load the boot block and do other things. Such partitions should not be treated as normal partitions, because all the other partitions overlap this whole-disk one. So we'd see multiple instances of the same UUID etc. which we do not want. udev and friends can thus search for this 'whole_disk' attribute and use it to decide to ignore the partition. Signed-off-by: Fabio Massimo Di Nitto <fabbione@ubuntu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'fs')
-rw-r--r--fs/partitions/check.c15
-rw-r--r--fs/partitions/msdos.c2
-rw-r--r--fs/partitions/sgi.c2
-rw-r--r--fs/partitions/sun.c5
4 files changed, 18 insertions, 6 deletions
diff --git a/fs/partitions/check.c b/fs/partitions/check.c
index 3d73d94d93a..ac32a2e8540 100644
--- a/fs/partitions/check.c
+++ b/fs/partitions/check.c
@@ -365,7 +365,7 @@ void delete_partition(struct gendisk *disk, int part)
kobject_put(&p->kobj);
}
-void add_partition(struct gendisk *disk, int part, sector_t start, sector_t len)
+void add_partition(struct gendisk *disk, int part, sector_t start, sector_t len, int flags)
{
struct hd_struct *p;
@@ -390,6 +390,15 @@ void add_partition(struct gendisk *disk, int part, sector_t start, sector_t len)
if (!disk->part_uevent_suppress)
kobject_uevent(&p->kobj, KOBJ_ADD);
sysfs_create_link(&p->kobj, &block_subsys.kset.kobj, "subsystem");
+ if (flags & ADDPART_FLAG_WHOLEDISK) {
+ static struct attribute addpartattr = {
+ .name = "whole_disk",
+ .mode = S_IRUSR | S_IRGRP | S_IROTH,
+ .owner = THIS_MODULE,
+ };
+
+ sysfs_create_file(&p->kobj, &addpartattr);
+ }
partition_sysfs_add_subdir(p);
disk->part[part-1] = p;
}
@@ -543,9 +552,9 @@ int rescan_partitions(struct gendisk *disk, struct block_device *bdev)
printk(" %s: p%d exceeds device capacity\n",
disk->disk_name, p);
}
- add_partition(disk, p, from, size);
+ add_partition(disk, p, from, size, state->parts[p].flags);
#ifdef CONFIG_BLK_DEV_MD
- if (state->parts[p].flags)
+ if (state->parts[p].flags & ADDPART_FLAG_RAID)
md_autodetect_dev(bdev->bd_dev+p);
#endif
}
diff --git a/fs/partitions/msdos.c b/fs/partitions/msdos.c
index 8c7af177781..d964d1f90de 100644
--- a/fs/partitions/msdos.c
+++ b/fs/partitions/msdos.c
@@ -155,7 +155,7 @@ parse_extended(struct parsed_partitions *state, struct block_device *bdev,
put_partition(state, state->next, next, size);
if (SYS_IND(p) == LINUX_RAID_PARTITION)
- state->parts[state->next].flags = 1;
+ state->parts[state->next].flags = ADDPART_FLAG_RAID;
loopct = 0;
if (++state->next == state->limit)
goto done;
diff --git a/fs/partitions/sgi.c b/fs/partitions/sgi.c
index 6fa4ff89510..ed5ac83fe83 100644
--- a/fs/partitions/sgi.c
+++ b/fs/partitions/sgi.c
@@ -72,7 +72,7 @@ int sgi_partition(struct parsed_partitions *state, struct block_device *bdev)
if (blocks) {
put_partition(state, slot, start, blocks);
if (be32_to_cpu(p->type) == LINUX_RAID_PARTITION)
- state->parts[slot].flags = 1;
+ state->parts[slot].flags = ADDPART_FLAG_RAID;
}
slot++;
}
diff --git a/fs/partitions/sun.c b/fs/partitions/sun.c
index 0a5927c806c..123f8b46c8b 100644
--- a/fs/partitions/sun.c
+++ b/fs/partitions/sun.c
@@ -80,8 +80,11 @@ int sun_partition(struct parsed_partitions *state, struct block_device *bdev)
num_sectors = be32_to_cpu(p->num_sectors);
if (num_sectors) {
put_partition(state, slot, st_sector, num_sectors);
+ state->parts[slot].flags = 0;
if (label->infos[i].id == LINUX_RAID_PARTITION)
- state->parts[slot].flags = 1;
+ state->parts[slot].flags |= ADDPART_FLAG_RAID;
+ if (label->infos[i].id == SUN_WHOLE_DISK)
+ state->parts[slot].flags |= ADDPART_FLAG_WHOLEDISK;
}
slot++;
}