https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=234713
Bug ID: 234713
Summary: under linux emulation listxattr returns incorrect
result
Product: Base System
Version: 11.2-RELEASE
Hardware: Any
OS: Any
Status: New
Severity: Affects Only Me
Priority: ---
Component: kern
Assignee: b...@freebsd.org
Reporter: we...@uni-mainz.de
after upgrade from 11.1 to 11.2 release tivoli storage manager client (TSM)
fails due to incorrect listxattr implementation.
listxattr should return error -EOPNOTSUPP if file system does not support
extended attributes and no error and result 0 if file does not have
extended attributes. With 11.2 listxattr returns -ENODATA in the
second case.
On linux output of strace of listxattr of directory ./nano without
extended attributes:
listxattr(".nano/", NULL, 0) = 0
On FreeBSD output of ktrace of listxattr of directory without
extended attributes:
54332 dsmc RET linux_llistxattr -1 errno -61 Attribute not found
Following change in code between 11.1 and 11.2 led to the emergence of the bug.
In 11.1 EOPNOTSUPP was returned instead of ENODATA. This change may seem
correct for other linux xattr calls, but not for listxattr.
*** linux32_sysvec.c Mon Jan 7 18:30:21 2019
--- linux32_sysvec.c-11.2 Fri Jun 22 01:02:23 2018
***************
*** 146,152 ****
-100,-101,-102,-103,-104,-105,-106,-107,-108,-109,
-110,-111, -40, -36,-112,-113, -39, -11, -87,-122,
-116, -66, -6, -6, -6, -6, -6, -37, -38, -9,
! -6, -6, -43, -42, -75,-125, -84, -95, -16, -74,
-72, -67, -71
};
--- 146,152 ----
-100,-101,-102,-103,-104,-105,-106,-107,-108,-109,
-110,-111, -40, -36,-112,-113, -39, -11, -87,-122,
-116, -66, -6, -6, -6, -6, -6, -37, -38, -9,
! -6, -6, -43, -42, -75,-125, -84, -61, -16, -74,
-72, -67, -71
};
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