ocfs2: Move trusted and user attribute support into xattr.c

[linux-2.6-omap-h63xx.git] / fs / ocfs2 / xattr.c

diff --git a/fs/ocfs2/xattr.c b/fs/ocfs2/xattr.c
index e21a1a8b42578959a459ac071ca4d38ac31c1858..0f556b00235e695a7487ff098a7fe8f78a5c61c0 100644 (file)
--- a/fs/ocfs2/xattr.c
+++ b/fs/ocfs2/xattr.c
@@ -37,6 +37,9 @@
 #include <linux/writeback.h>
 #include <linux/falloc.h>
 #include <linux/sort.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/string.h>
 
 #define MLOG_MASK_PREFIX ML_XATTR
 #include <cluster/masklog.h>
@@ -4740,3 +4743,110 @@ static int ocfs2_delete_xattr_index_block(struct inode *inode,
 out:
        return ret;
 }
+
+/*
+ * 'trusted' attributes support
+ */
+
+#define XATTR_TRUSTED_PREFIX "trusted."
+
+static size_t ocfs2_xattr_trusted_list(struct inode *inode, char *list,
+                                      size_t list_size, const char *name,
+                                      size_t name_len)
+{
+       const size_t prefix_len = sizeof(XATTR_TRUSTED_PREFIX) - 1;
+       const size_t total_len = prefix_len + name_len + 1;
+
+       if (list && total_len <= list_size) {
+               memcpy(list, XATTR_TRUSTED_PREFIX, prefix_len);
+               memcpy(list + prefix_len, name, name_len);
+               list[prefix_len + name_len] = '\0';
+       }
+       return total_len;
+}
+
+static int ocfs2_xattr_trusted_get(struct inode *inode, const char *name,
+                                  void *buffer, size_t size)
+{
+       if (strcmp(name, "") == 0)
+               return -EINVAL;
+       return ocfs2_xattr_get(inode, OCFS2_XATTR_INDEX_TRUSTED, name,
+                              buffer, size);
+}
+
+static int ocfs2_xattr_trusted_set(struct inode *inode, const char *name,
+                                  const void *value, size_t size, int flags)
+{
+       if (strcmp(name, "") == 0)
+               return -EINVAL;
+
+       return ocfs2_xattr_set(inode, OCFS2_XATTR_INDEX_TRUSTED, name, value,
+                              size, flags);
+}
+
+struct xattr_handler ocfs2_xattr_trusted_handler = {
+       .prefix = XATTR_TRUSTED_PREFIX,
+       .list   = ocfs2_xattr_trusted_list,
+       .get    = ocfs2_xattr_trusted_get,
+       .set    = ocfs2_xattr_trusted_set,
+};
+
+
+/*
+ * 'user' attributes support
+ */
+
+#define XATTR_USER_PREFIX "user."
+
+static size_t ocfs2_xattr_user_list(struct inode *inode, char *list,
+                                   size_t list_size, const char *name,
+                                   size_t name_len)
+{
+       const size_t prefix_len = sizeof(XATTR_USER_PREFIX) - 1;
+       const size_t total_len = prefix_len + name_len + 1;
+       struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
+
+       if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR)
+               return 0;
+
+       if (list && total_len <= list_size) {
+               memcpy(list, XATTR_USER_PREFIX, prefix_len);
+               memcpy(list + prefix_len, name, name_len);
+               list[prefix_len + name_len] = '\0';
+       }
+       return total_len;
+}
+
+static int ocfs2_xattr_user_get(struct inode *inode, const char *name,
+                               void *buffer, size_t size)
+{
+       struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
+
+       if (strcmp(name, "") == 0)
+               return -EINVAL;
+       if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR)
+               return -EOPNOTSUPP;
+       return ocfs2_xattr_get(inode, OCFS2_XATTR_INDEX_USER, name,
+                              buffer, size);
+}
+
+static int ocfs2_xattr_user_set(struct inode *inode, const char *name,
+                               const void *value, size_t size, int flags)
+{
+       struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
+
+       if (strcmp(name, "") == 0)
+               return -EINVAL;
+       if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR)
+               return -EOPNOTSUPP;
+
+       return ocfs2_xattr_set(inode, OCFS2_XATTR_INDEX_USER, name, value,
+                              size, flags);
+}
+
+struct xattr_handler ocfs2_xattr_user_handler = {
+       .prefix = XATTR_USER_PREFIX,
+       .list   = ocfs2_xattr_user_list,
+       .get    = ocfs2_xattr_user_get,
+       .set    = ocfs2_xattr_user_set,
+};