mirror of
https://github.com/torvalds/linux.git
synced 2024-12-01 00:21:32 +00:00
88ee9d571b
The Hurd gained[0] support for moving the translator and author
fields out of the inode and into the "gnu.*" xattr namespace.
In anticipation of that, an xattr INDEX was reserved[1]. The Hurd has
now been brought into compliance[2] with that.
This patch adds support for reading and writing such attributes from
Linux; you can now do something like
mkdir -p hurd-root/servers/socket
touch hurd-root/servers/socket/1
setfattr --name=gnu.translator --value='"/hurd/pflocal\0"' \
hurd-root/servers/socket/1
getfattr --name=gnu.translator hurd-root/servers/socket/1
# file: 1
gnu.translator="/hurd/pflocal"
to setup a pipe translator, which is being used to create[3] a
vm-image for the Hurd from GNU Guix.
[0] https://summerofcode.withgoogle.com/projects/#5869799859027968
[1] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3980bd3b406addb327d858aebd19e229ea340b9a
[2] https://git.savannah.gnu.org/cgit/hurd/hurd.git/commit/?id=a04c7bf83172faa7cb080fbe3b6c04a8415ca645
[3] https://git.savannah.gnu.org/cgit/guix.git/log/?h=wip-hurd-vm
Signed-off-by: Jan Nieuwenhuizen <janneke@gnu.org>
Link: https://lore.kernel.org/r/20200525193940.878-1-janneke@gnu.org
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
52 lines
1.3 KiB
C
52 lines
1.3 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* linux/fs/ext4/xattr_hurd.c
|
|
* Handler for extended gnu attributes for the Hurd.
|
|
*
|
|
* Copyright (C) 2001 by Andreas Gruenbacher, <a.gruenbacher@computer.org>
|
|
* Copyright (C) 2020 by Jan (janneke) Nieuwenhuizen, <janneke@gnu.org>
|
|
*/
|
|
|
|
#include <linux/init.h>
|
|
#include <linux/string.h>
|
|
#include "ext4.h"
|
|
#include "xattr.h"
|
|
|
|
static bool
|
|
ext4_xattr_hurd_list(struct dentry *dentry)
|
|
{
|
|
return test_opt(dentry->d_sb, XATTR_USER);
|
|
}
|
|
|
|
static int
|
|
ext4_xattr_hurd_get(const struct xattr_handler *handler,
|
|
struct dentry *unused, struct inode *inode,
|
|
const char *name, void *buffer, size_t size)
|
|
{
|
|
if (!test_opt(inode->i_sb, XATTR_USER))
|
|
return -EOPNOTSUPP;
|
|
|
|
return ext4_xattr_get(inode, EXT4_XATTR_INDEX_HURD,
|
|
name, buffer, size);
|
|
}
|
|
|
|
static int
|
|
ext4_xattr_hurd_set(const struct xattr_handler *handler,
|
|
struct dentry *unused, struct inode *inode,
|
|
const char *name, const void *value,
|
|
size_t size, int flags)
|
|
{
|
|
if (!test_opt(inode->i_sb, XATTR_USER))
|
|
return -EOPNOTSUPP;
|
|
|
|
return ext4_xattr_set(inode, EXT4_XATTR_INDEX_HURD,
|
|
name, value, size, flags);
|
|
}
|
|
|
|
const struct xattr_handler ext4_xattr_hurd_handler = {
|
|
.prefix = XATTR_HURD_PREFIX,
|
|
.list = ext4_xattr_hurd_list,
|
|
.get = ext4_xattr_hurd_get,
|
|
.set = ext4_xattr_hurd_set,
|
|
};
|