Btrfs: selinux support

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>

1 files changed, 19 insertions, 4 deletions

diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 2bb65e9b1448..4a79e1c5ebd0 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -90,6 +90,16 @@ static noinline int cow_file_range(struct inode *inode,
                                    u64 start, u64 end, int *page_started,
                                    unsigned long *nr_written, int unlock);
 
+static int btrfs_init_inode_security(struct inode *inode,  struct inode *dir)
+{
+        int err;
+
+        err = btrfs_init_acl(inode, dir);
+        if (!err)
+                err = btrfs_xattr_security_init(inode, dir);
+        return err;
+}
+
 /*
  * a very lame attempt at stopping writes when the FS is 85% full.  There
  * are countless ways this is incorrect, but it is better than nothing.
@@ -2037,6 +2047,7 @@ void btrfs_read_locked_inode(struct inode *inode)
                 inode->i_mapping->backing_dev_info = &root->fs_info->bdi;
                 break;
         default:
+                inode->i_op = &btrfs_special_inode_operations;
                 init_special_inode(inode, inode->i_mode, rdev);
                 break;
         }
@@ -3584,7 +3595,7 @@ static int btrfs_mknod(struct inode *dir, struct dentry *dentry,
         if (IS_ERR(inode))
                 goto out_unlock;
 
-        err = btrfs_init_acl(inode, dir);
+        err = btrfs_init_inode_security(inode, dir);
         if (err) {
                 drop_inode = 1;
                 goto out_unlock;
@@ -3647,7 +3658,7 @@ static int btrfs_create(struct inode *dir, struct dentry *dentry,
         if (IS_ERR(inode))
                 goto out_unlock;
 
-        err = btrfs_init_acl(inode, dir);
+        err = btrfs_init_inode_security(inode, dir);
         if (err) {
                 drop_inode = 1;
                 goto out_unlock;
@@ -3770,7 +3781,7 @@ static int btrfs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
 
         drop_on_err = 1;
 
-        err = btrfs_init_acl(inode, dir);
+        err = btrfs_init_inode_security(inode, dir);
         if (err)
                 goto out_fail;
 
@@ -4732,7 +4743,7 @@ static int btrfs_symlink(struct inode *dir, struct dentry *dentry,
         if (IS_ERR(inode))
                 goto out_unlock;
 
-        err = btrfs_init_acl(inode, dir);
+        err = btrfs_init_inode_security(inode, dir);
         if (err) {
                 drop_inode = 1;
                 goto out_unlock;
@@ -5043,4 +5054,8 @@ static struct inode_operations btrfs_symlink_inode_operations = {
         .follow_link    = page_follow_link_light,
         .put_link       = page_put_link,
         .permission     = btrfs_permission,
+        .setxattr       = btrfs_setxattr,
+        .getxattr       = btrfs_getxattr,
+        .listxattr      = btrfs_listxattr,
+        .removexattr    = btrfs_removexattr,
 };