Merge branch 'overlayfs-current' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs into for-linus

"The biggest change is to rename the filesystem from "overlayfs" to "overlay".
This will allow legacy overlayfs to be easily carried by distros alongside the
new mainline one.  Also fix a couple of copy-up races and allow escaping comma
character in filenames."

The last bit is about commas in pathname mount options...

1 files changed, 70 insertions, 14 deletions

diff --git a/include/linux/of.h b/include/linux/of.h
index 6545e7aec7bb..29f0adc5f3e4 100644
--- a/include/linux/of.h
+++ b/include/linux/of.h
@@ -267,14 +267,12 @@ extern int of_property_read_u64(const struct device_node *np,
 extern int of_property_read_string(struct device_node *np,
                                    const char *propname,
                                    const char **out_string);
-extern int of_property_read_string_index(struct device_node *np,
-                                         const char *propname,
-                                         int index, const char **output);
 extern int of_property_match_string(struct device_node *np,
                                     const char *propname,
                                     const char *string);
-extern int of_property_count_strings(struct device_node *np,
-                                     const char *propname);
+extern int of_property_read_string_helper(struct device_node *np,
+                                              const char *propname,
+                                              const char **out_strs, size_t sz, int index);
 extern int of_device_is_compatible(const struct device_node *device,
                                    const char *);
 extern int of_device_is_available(const struct device_node *device);
@@ -486,15 +484,9 @@ static inline int of_property_read_string(struct device_node *np,
         return -ENOSYS;
 }
 
-static inline int of_property_read_string_index(struct device_node *np,
-                                                const char *propname, int index,
-                                                const char **out_string)
-{
-        return -ENOSYS;
-}
-
-static inline int of_property_count_strings(struct device_node *np,
-                                            const char *propname)
+static inline int of_property_read_string_helper(struct device_node *np,
+                                                 const char *propname,
+                                                 const char **out_strs, size_t sz, int index)
 {
         return -ENOSYS;
 }
@@ -668,6 +660,70 @@ static inline int of_property_count_u64_elems(const struct device_node *np,
 }
 
 /**
+ * of_property_read_string_array() - Read an array of strings from a multiple
+ * strings property.
+ * @np:         device node from which the property value is to be read.
+ * @propname:   name of the property to be searched.
+ * @out_strs:   output array of string pointers.
+ * @sz:         number of array elements to read.
+ *
+ * Search for a property in a device tree node and retrieve a list of
+ * terminated string values (pointer to data, not a copy) in that property.
+ *
+ * If @out_strs is NULL, the number of strings in the property is returned.
+ */
+static inline int of_property_read_string_array(struct device_node *np,
+                                                const char *propname, const char **out_strs,
+                                                size_t sz)
+{
+        return of_property_read_string_helper(np, propname, out_strs, sz, 0);
+}
+
+/**
+ * of_property_count_strings() - Find and return the number of strings from a
+ * multiple strings property.
+ * @np:         device node from which the property value is to be read.
+ * @propname:   name of the property to be searched.
+ *
+ * Search for a property in a device tree node and retrieve the number of null
+ * terminated string contain in it. Returns the number of strings on
+ * success, -EINVAL if the property does not exist, -ENODATA if property
+ * does not have a value, and -EILSEQ if the string is not null-terminated
+ * within the length of the property data.
+ */
+static inline int of_property_count_strings(struct device_node *np,
+                                            const char *propname)
+{
+        return of_property_read_string_helper(np, propname, NULL, 0, 0);
+}
+
+/**
+ * of_property_read_string_index() - Find and read a string from a multiple
+ * strings property.
+ * @np:         device node from which the property value is to be read.
+ * @propname:   name of the property to be searched.
+ * @index:      index of the string in the list of strings
+ * @out_string: pointer to null terminated return string, modified only if
+ *              return value is 0.
+ *
+ * Search for a property in a device tree node and retrieve a null
+ * terminated string value (pointer to data, not a copy) in the list of strings
+ * contained in that property.
+ * Returns 0 on success, -EINVAL if the property does not exist, -ENODATA if
+ * property does not have a value, and -EILSEQ if the string is not
+ * null-terminated within the length of the property data.
+ *
+ * The out_string pointer is modified only if a valid string can be decoded.
+ */
+static inline int of_property_read_string_index(struct device_node *np,
+                                                const char *propname,
+                                                int index, const char **output)
+{
+        int rc = of_property_read_string_helper(np, propname, output, 1, index);
+        return rc < 0 ? rc : 0;
+}
+
+/**
  * of_property_read_bool - Findfrom a property
  * @np:         device node from which the property value is to be read.
  * @propname:   name of the property to be searched.