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| author | Peter Rajnoha | 2012-09-20 09:39:57 +0200 |
|---|---|---|
| committer | Karel Zak | 2012-09-21 12:21:30 +0200 |
| commit | 857db7f53c03ca363de50682a4958ae9f1f77391 (patch) | |
| tree | d488ec54412bda11ff651382bfc9bcd0993c5818 /lib/sysfs.c | |
| parent | setterm: make error message more informative (diff) | |
| download | kernel-qcow2-util-linux-857db7f53c03ca363de50682a4958ae9f1f77391.tar.gz kernel-qcow2-util-linux-857db7f53c03ca363de50682a4958ae9f1f77391.tar.xz kernel-qcow2-util-linux-857db7f53c03ca363de50682a4958ae9f1f77391.zip | |
lib/sysfs: fix sysfs_devname_to_devno for dm partitions
Partitions mapped by device-mapper are not like real partitions where
there's a /sys/block/<parent>/<name>/dev sysfs path. We need to look
at /sys/block/<name>/dev like we do for any other non-partition devices.
The mapped partition is not found otherwise.
For example, this bug shows up in lsblk while specifying a device
on command line while that device is a dm mapping over a partition:
$lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 128M 0 disk
`-test (dm-0) 253:0 0 128M 0 dm
`-test1 (dm-1) 253:1 0 127M 0 part
Before this patch:
$lsblk /dev/mapper/test1
lsblk: dm-1: unknown device name
With this patch:
$lsblk /dev/mapper/test1
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
test1 (dm-1) 253:1 0 127M 0 part
Diffstat (limited to 'lib/sysfs.c')
| -rw-r--r-- | lib/sysfs.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/sysfs.c b/lib/sysfs.c index d1eccb585..1384acda6 100644 --- a/lib/sysfs.c +++ b/lib/sysfs.c @@ -58,7 +58,7 @@ dev_t sysfs_devname_to_devno(const char *name, const char *parent) name += 5; /* unaccesible, or not node in /dev */ } - if (!dev && parent) { + if (!dev && parent && strncmp("dm-", name, 3)) { /* * Create path to /sys/block/<parent>/<name>/dev */ |