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authorTejun Heo <tj@kernel.org>2013-11-24 02:40:02 +0400
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2013-12-04 19:34:45 +0400
commit2322392b020badfe49730f1529b9c1a15248c387 (patch)
treeda17c0d183045351ae25f8173f2c0cfd7c7b8a55 /fs/kernfs/symlink.c
parent9a8049affd55a2c857a89faece27b878416fbf91 (diff)
downloadlinux-2322392b020badfe49730f1529b9c1a15248c387.tar.xz
kernfs: implement "trusted.*" xattr support
kernfs inherited "security.*" xattr support from sysfs. This patch extends xattr support to "trusted.*" using simple_xattr_*(). As trusted xattrs are restricted to CAP_SYS_ADMIN, simple_xattr_*() which uses kernel memory for storage shouldn't be problematic. Note that the existing "security.*" support doesn't implement get/remove/list and the this patch only implements those ops for "trusted.*". We probably want to extend those ops to include support for "security.*". This patch will allow using kernfs from cgroup which requires "trusted.*" xattr support. Signed-off-by: Tejun Heo <tj@kernel.org> Cc: David P. Quigley <dpquigl@tycho.nsa.gov> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs/kernfs/symlink.c')
-rw-r--r--fs/kernfs/symlink.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/kernfs/symlink.c b/fs/kernfs/symlink.c
index 12569a738837..adf28755b0ee 100644
--- a/fs/kernfs/symlink.c
+++ b/fs/kernfs/symlink.c
@@ -140,6 +140,9 @@ static void sysfs_put_link(struct dentry *dentry, struct nameidata *nd,
const struct inode_operations sysfs_symlink_inode_operations = {
.setxattr = sysfs_setxattr,
+ .removexattr = sysfs_removexattr,
+ .getxattr = sysfs_getxattr,
+ .listxattr = sysfs_listxattr,
.readlink = generic_readlink,
.follow_link = sysfs_follow_link,
.put_link = sysfs_put_link,