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| author | Matt Fleming <matt.fleming@intel.com> | 2013-02-01 11:02:28 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-03-04 06:03:40 +0800 |
| commit | 688289c4b745c018b3449b4b4c5a2030083c8eaf (patch) | |
| tree | 547b7b2971c3ed40a450559d0fd68578b4c79d6e /fs/xfs/xfs_bmap.c | |
| parent | 70afdfc6b4e4fec67bd07a5af56e0f8f7ecc7f46 (diff) | |
efivarfs: guid part of filenames are case-insensitive
commit da27a24383b2b10bf6ebd0db29b325548aafecb4 upstream.
It makes no sense to treat the following filenames as unique,
VarName-abcdefab-abcd-abcd-abcd-abcdefabcdef
VarName-ABCDEFAB-ABCD-ABCD-ABCD-ABCDEFABCDEF
VarName-ABcDEfAB-ABcD-ABcD-ABcD-ABcDEfABcDEf
VarName-aBcDEfAB-aBcD-aBcD-aBcD-aBcDEfaBcDEf
... etc ...
since the guid will be converted into a binary representation, which
has no case.
Roll our own dentry operations so that we can treat the variable name
part of filenames ("VarName" in the above example) as case-sensitive,
but the guid portion as case-insensitive. That way, efivarfs will
refuse to create the above files if any one already exists.
Reported-by: Lingzhu Xiang <lxiang@redhat.com>
Cc: Matthew Garrett <mjg59@srcf.ucam.org>
Cc: Jeremy Kerr <jeremy.kerr@canonical.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs/xfs/xfs_bmap.c')
0 files changed, 0 insertions, 0 deletions