Bug 16259

Summary:	Uses in-kernel uuid translation: open /dev/sdd failed
Product:	File System	Reporter:	Bastian Blank (waldi)
Component:	btrfs	Assignee:	fs_btrfs (fs_btrfs)
Status:	RESOLVED OBSOLETE
Severity:	high	CC:	josef
Priority:	P1
Hardware:	All
OS:	Linux
Kernel Version:	2.6.32	Subsystem:
Regression:	No	Bisected commit-id:

Description Bastian Blank 2010-06-20 15:17:55 UTC

The btrfs module uses a in-kernel uuid to device translation. As the device names are not nearly static during the runtime of the kernel, the leads to a DoS, where a filesystem is not longer mountable.

[272268.496957] device fsid 6746742515f05f59-7702ee31ff5c53ac devid 1 transid 130 /dev/sde
[272268.497019] open /dev/sdd failed

# file -s /dev/sde
/dev/sde: BTRFS Filesystem sectorsize 4096, nodesize 4096, leafsize 4096)
# file -s /dev/sdd
/dev/sdd: x86 boot sector; partition 1: ID=0x83, starthead 1, startsector 63, 625137282 sectors, extended partition table (last)\011, code offset 0x0

Such translations belongs to userspace, in the form of a mount helper for multi-device support.

Comment 1 Josef Bacik 2013-04-30 15:59:19 UTC

Closing, if this is still affecting you on a newer kernel please reopen.