Bluetooth: Ensure that HCI sysfs add/del is preempt safe

[pandora-kernel.git] / fs / reiserfs / xattr_security.c

diff --git a/fs/reiserfs/xattr_security.c b/fs/reiserfs/xattr_security.c
index 2aacf1f..4d3c20e 100644 (file)
--- a/fs/reiserfs/xattr_security.c
+++ b/fs/reiserfs/xattr_security.c
@@ -4,6 +4,7 @@
 #include <linux/pagemap.h>
 #include <linux/xattr.h>
 #include <linux/reiserfs_xattr.h>
+#include <linux/security.h>
 #include <asm/uaccess.h>
 
 static int
@@ -47,6 +48,59 @@ static size_t security_list(struct inode *inode, char *list, size_t list_len,
        return len;
 }
 
+/* Initializes the security context for a new inode and returns the number
+ * of blocks needed for the transaction. If successful, reiserfs_security
+ * must be released using reiserfs_security_free when the caller is done. */
+int reiserfs_security_init(struct inode *dir, struct inode *inode,
+                          struct reiserfs_security_handle *sec)
+{
+       int blocks = 0;
+       int error = security_inode_init_security(inode, dir, &sec->name,
+                                                &sec->value, &sec->length);
+       if (error) {
+               if (error == -EOPNOTSUPP)
+                       error = 0;
+
+               sec->name = NULL;
+               sec->value = NULL;
+               sec->length = 0;
+               return error;
+       }
+
+       if (sec->length) {
+               blocks = reiserfs_xattr_jcreate_nblocks(inode) +
+                        reiserfs_xattr_nblocks(inode, sec->length);
+               /* We don't want to count the directories twice if we have
+                * a default ACL. */
+               REISERFS_I(inode)->i_flags |= i_has_xattr_dir;
+       }
+       return blocks;
+}
+
+int reiserfs_security_write(struct reiserfs_transaction_handle *th,
+                           struct inode *inode,
+                           struct reiserfs_security_handle *sec)
+{
+       int error;
+       if (strlen(sec->name) < sizeof(XATTR_SECURITY_PREFIX))
+               return -EINVAL;
+
+       error = reiserfs_xattr_set_handle(th, inode, sec->name, sec->value,
+                                         sec->length, XATTR_CREATE);
+       if (error == -ENODATA || error == -EOPNOTSUPP)
+               error = 0;
+
+       return error;
+}
+
+void reiserfs_security_free(struct reiserfs_security_handle *sec)
+{
+       kfree(sec->name);
+       kfree(sec->value);
+       sec->name = NULL;
+       sec->value = NULL;
+}
+
 struct xattr_handler reiserfs_xattr_security_handler = {
        .prefix = XATTR_SECURITY_PREFIX,
        .get = security_get,