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[src/netbsd-7]: src/sys/ufs/ufs Pull up following revision(s) (requested by m...
details: https://anonhg.NetBSD.org/src/rev/8714854a36c3
branches: netbsd-7
changeset: 798738:8714854a36c3
user: msaitoh <msaitoh%NetBSD.org@localhost>
date: Mon Dec 22 03:32:23 2014 +0000
description:
Pull up following revision(s) (requested by manu in ticket #350):
sys/ufs/ufs/extattr.h: revision 1.11
Bump UFS1 extended attribute max name length to 256
For extended attribute name max length, kernel filesystem-independant
code use either EXTATTR_MAXNAMELEN (BSD API) or XATTR_NAME_MAX (Linux
API),
which are both defined as KERNEL_NAME_MAX and fits Linux limit of 255
without training \0.
UFS1 code had a lower limit that broke Linux compatibility. We can bump
the limit without sacrifying backward compatibility, because:
1) There is no API exposing this limit outside the kernel. Upper kernel
layers have a larger limit handle the increase without a hitch
2) Each attribute has its own backing store in the fileystem, the name
of the backing store matching the attribute name. A newer kernel can
create/read/write backing store for longer attribute names and will
have no problem with existing shorter names.
diffstat:
sys/ufs/ufs/extattr.h | 4 ++--
1 files changed, 2 insertions(+), 2 deletions(-)
diffs (18 lines):
diff -r 6f99b4de2e93 -r 8714854a36c3 sys/ufs/ufs/extattr.h
--- a/sys/ufs/ufs/extattr.h Mon Dec 22 03:28:32 2014 +0000
+++ b/sys/ufs/ufs/extattr.h Mon Dec 22 03:32:23 2014 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: extattr.h,v 1.10 2011/10/09 21:15:34 chs Exp $ */
+/* $NetBSD: extattr.h,v 1.10.28.1 2014/12/22 03:32:23 msaitoh Exp $ */
/*-
* Copyright (c) 1999-2001 Robert N. M. Watson
@@ -43,7 +43,7 @@
#define UFS_EXTATTR_FSROOTSUBDIR ".attribute"
#define UFS_EXTATTR_SUBDIR_SYSTEM "system"
#define UFS_EXTATTR_SUBDIR_USER "user"
-#define UFS_EXTATTR_MAXEXTATTRNAME 65 /* including null */
+#define UFS_EXTATTR_MAXEXTATTRNAME 256 /* including null */
#define UFS_EXTATTR_ATTR_FLAG_INUSE 0x00000001 /* attr has been set */
#define UFS_EXTATTR_PERM_KERNEL 0x00000000
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