Re: [RFC][PATCH] extended attributes

[Nathan Scott <nathans@sgi.com>]

On Wed, Nov 07, 2001 at 02:32:18AM +0100, Andi Kleen wrote:
> On Wed, Nov 07, 2001 at 11:12:24AM +1100, Nathan Scott wrote:
> > A manual page describing the system call interface can be found here[4].
> > We're very interested in feedback on this.  In particular, Linus - would
> 
> The cursor support looks quite complicated.  ...
> Stateless cursors are just nasty!
> ...

hi folks,

We've removed the cursor operations, and gone back to Andreas'
original, simpler list approach.  Revised versions of the two
extattr man pages are in the XFS CVS repository, or use:
	http://acl.bestbits.at/man/extattr.2.html
	http://acl.bestbits.at/man/extattr.5.html

I notice that 2.4.15-pre3 doesn't have the patch below - Linus,
Alan, could you please apply it? - it will help us a great deal.
This would be useful to the ext2/ext3, InterMezzo/SnapFS, NTFS,
XFS, JFS and BeFS filesystem implementations for Linux, and to
any other filesystems planning to support extended attributes
in the future as well.

many thanks.

-- 
Nathan


diff -Naur 2.4.14-pristine/arch/i386/kernel/entry.S 2.4.14-reserved/arch/i386/kernel/entry.S
--- 2.4.14-pristine/arch/i386/kernel/entry.S	Sat Nov  3 12:18:49 2001
+++ 2.4.14-reserved/arch/i386/kernel/entry.S	Wed Nov  7 10:02:59 2001
@@ -622,6 +622,9 @@
 	.long SYMBOL_NAME(sys_ni_syscall)	/* Reserved for Security */
 	.long SYMBOL_NAME(sys_gettid)
 	.long SYMBOL_NAME(sys_readahead)	/* 225 */
+	.long SYMBOL_NAME(sys_ni_syscall)	/* reserved for extattr  */
+	.long SYMBOL_NAME(sys_ni_syscall)	/* reserved for lextattr */
+	.long SYMBOL_NAME(sys_ni_syscall)	/* reserved for fextattr */
 
 	.rept NR_syscalls-(.-sys_call_table)/4
 		.long SYMBOL_NAME(sys_ni_syscall)
diff -Naur 2.4.14-pristine/include/asm-i386/unistd.h 2.4.14-reserved/include/asm-i386/unistd.h
--- 2.4.14-pristine/include/asm-i386/unistd.h	Thu Oct 18 03:03:03 2001
+++ 2.4.14-reserved/include/asm-i386/unistd.h	Wed Nov  7 10:02:59 2001
@@ -230,6 +230,9 @@
 #define __NR_security		223	/* syscall for security modules */
 #define __NR_gettid		224
 #define __NR_readahead		225
+#define __NR_extattr		226	/* syscall for extended attributes */
+#define __NR_lextattr		227	/* syscall for extended attributes */
+#define __NR_fextattr		228	/* syscall for extended attributes */
 
 /* user-visible error numbers are in the range -1 - -124: see <asm-i386/errno.h> */