bybrooklyn/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-04-18 23:03:57 -04:00
Code Issues Packages Projects Releases Wiki Activity

kernel/ksysfs.c: export kernel cpu byteorder

Browse Source 
Certain files in procfs are formatted in byteorder-dependent formats.
For example the IP addresses in /proc/net/udp.

When using emulation like qemu-user, applications are not guaranteed to
be using the same byteorder as the kernel.
Therefore the kernel needs to provide a way for applications to discover
the byteorder used in API-filesystems.
Using systemcalls is not enough because these are intercepted and
translated by the emulation.

Also this makes it easier for non-compiled applications like
shellscripts to discover the byteorder.

Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Link: https://lore.kernel.org/r/20221103152407.3348-1-linux@weissschuh.net
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Thomas Weißschuh
2022-11-03 16:24:07 +01:00
committed by Greg Kroah-Hartman
parent 52c4d11f1d
commit d3d76fbde1
2 changed files with 30 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

12
Documentation/ABI/testing/sysfs-kernel-cpu_byteorder Normal file
View File

@@ -0,0 +1,12 @@
What: /sys/kernel/cpu_byteorder
Date: February 2023
KernelVersion: 6.2
Contact: Thomas Weißschuh <linux@weissschuh.net>
Description:
The endianness of the running kernel.
Access: Read
Valid values:
"little", "big"
Users: util-linux