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Btrfs: selinux support

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Add call to LSM security initialization and save
resulting security xattr for new inodes.

Add xattr support to symlink inode ops.

Set inode->i_op for existing special files.

Signed-off-by: jim owens <jowens@hp.com>
This commit is contained in:
Jim Owens
2009-02-04 09:29:13 -05:00
committed by Chris Mason
parent bef62ef339
commit 0279b4cd86
3 changed files with 53 additions and 4 deletions
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32
fs/btrfs/xattr.c
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@@ -21,6 +21,7 @@
#include <linux/slab.h>
#include <linux/rwsem.h>
#include <linux/xattr.h>
#include <linux/security.h>
#include "ctree.h"
#include "btrfs_inode.h"
#include "transaction.h"
@@ -330,3 +331,34 @@ int btrfs_removexattr(struct dentry *dentry, const char *name)
return -EOPNOTSUPP;
return __btrfs_setxattr(dentry->d_inode, name, NULL, 0, XATTR_REPLACE);
}
int btrfs_xattr_security_init(struct inode *inode, struct inode *dir)
{
int err;
size_t len;
void *value;
char *suffix;
char *name;
err = security_inode_init_security(inode, dir, &suffix, &value, &len);
if (err) {
if (err == -EOPNOTSUPP)
return 0;
return err;
}
name = kmalloc(XATTR_SECURITY_PREFIX_LEN + strlen(suffix) + 1,
GFP_NOFS);
if (!name) {
err = -ENOMEM;
} else {
strcpy(name, XATTR_SECURITY_PREFIX);
strcpy(name + XATTR_SECURITY_PREFIX_LEN, suffix);
err = __btrfs_setxattr(inode, name, value, len, 0);
kfree(name);
}
kfree(suffix);
kfree(value);
return err;
}