ext4: export inline xattr functions

The inline data feature will need some inline xattr functions, so
export them from fs/ext4/xattr.c so that inline.c can use them.

Signed-off-by: Tao Ma <boyu.mt@taobao.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>

diff --git a/fs/ext4/xattr.c b/fs/ext4/xattr.c
index b1adda1..a47dc38 100644 (file)
--- a/fs/ext4/xattr.c
+++ b/fs/ext4/xattr.c
@@ -61,11 +61,6 @@
 #include "xattr.h"
 #include "acl.h"
 
-#define BHDR(bh) ((struct ext4_xattr_header *)((bh)->b_data))
-#define ENTRY(ptr) ((struct ext4_xattr_entry *)(ptr))
-#define BFIRST(bh) ENTRY(BHDR(bh)+1)
-#define IS_LAST_ENTRY(entry) (*(__u32 *)(entry) == 0)
-
 #ifdef EXT4_XATTR_DEBUG
 # define ea_idebug(inode, f...) do { \
                printk(KERN_DEBUG "inode %s:%lu: ", \
@@ -312,7 +307,7 @@ cleanup:
        return error;
 }
 
-static int
+int
 ext4_xattr_ibody_get(struct inode *inode, int name_index, const char *name,
                     void *buffer, size_t buffer_size)
 {
@@ -581,21 +576,6 @@ static size_t ext4_xattr_free_space(struct ext4_xattr_entry *last,
        return (*min_offs - ((void *)last - base) - sizeof(__u32));
 }
 
-struct ext4_xattr_info {
-       int name_index;
-       const char *name;
-       const void *value;
-       size_t value_len;
-};
-
-struct ext4_xattr_search {
-       struct ext4_xattr_entry *first;
-       void *base;
-       void *end;
-       struct ext4_xattr_entry *here;
-       int not_found;
-};
-
 static int
 ext4_xattr_set_entry(struct ext4_xattr_info *i, struct ext4_xattr_search *s)
 {
@@ -949,14 +929,8 @@ bad_block:
 #undef header
 }
 
-struct ext4_xattr_ibody_find {
-       struct ext4_xattr_search s;
-       struct ext4_iloc iloc;
-};
-
-static int
-ext4_xattr_ibody_find(struct inode *inode, struct ext4_xattr_info *i,
-                     struct ext4_xattr_ibody_find *is)
+int ext4_xattr_ibody_find(struct inode *inode, struct ext4_xattr_info *i,
+                         struct ext4_xattr_ibody_find *is)
 {
        struct ext4_xattr_ibody_header *header;
        struct ext4_inode *raw_inode;
@@ -984,10 +958,9 @@ ext4_xattr_ibody_find(struct inode *inode, struct ext4_xattr_info *i,
        return 0;
 }
 
-static int
-ext4_xattr_ibody_set(handle_t *handle, struct inode *inode,
-                    struct ext4_xattr_info *i,
-                    struct ext4_xattr_ibody_find *is)
+int ext4_xattr_ibody_set(handle_t *handle, struct inode *inode,
+                        struct ext4_xattr_info *i,
+                        struct ext4_xattr_ibody_find *is)
 {
        struct ext4_xattr_ibody_header *header;
        struct ext4_xattr_search *s = &is->s;

diff --git a/fs/ext4/xattr.h b/fs/ext4/xattr.h
index 91f31ca..40ca7a6 100644 (file)
--- a/fs/ext4/xattr.h
+++ b/fs/ext4/xattr.h
@@ -65,6 +65,32 @@ struct ext4_xattr_entry {
                EXT4_I(inode)->i_extra_isize))
 #define IFIRST(hdr) ((struct ext4_xattr_entry *)((hdr)+1))
 
+#define BHDR(bh) ((struct ext4_xattr_header *)((bh)->b_data))
+#define ENTRY(ptr) ((struct ext4_xattr_entry *)(ptr))
+#define BFIRST(bh) ENTRY(BHDR(bh)+1)
+#define IS_LAST_ENTRY(entry) (*(__u32 *)(entry) == 0)
+
+
+struct ext4_xattr_info {
+       int name_index;
+       const char *name;
+       const void *value;
+       size_t value_len;
+};
+
+struct ext4_xattr_search {
+       struct ext4_xattr_entry *first;
+       void *base;
+       void *end;
+       struct ext4_xattr_entry *here;
+       int not_found;
+};
+
+struct ext4_xattr_ibody_find {
+       struct ext4_xattr_search s;
+       struct ext4_iloc iloc;
+};
+
 # ifdef CONFIG_EXT4_FS_XATTR
 
 extern const struct xattr_handler ext4_xattr_user_handler;
@@ -90,6 +116,15 @@ extern void ext4_exit_xattr(void);
 
 extern const struct xattr_handler *ext4_xattr_handlers[];
 
+extern int ext4_xattr_ibody_find(struct inode *inode, struct ext4_xattr_info *i,
+                                struct ext4_xattr_ibody_find *is);
+extern int ext4_xattr_ibody_get(struct inode *inode, int name_index,
+                               const char *name,
+                               void *buffer, size_t buffer_size);
+extern int ext4_xattr_ibody_set(handle_t *handle, struct inode *inode,
+                               struct ext4_xattr_info *i,
+                               struct ext4_xattr_ibody_find *is);
+
 # else  /* CONFIG_EXT4_FS_XATTR */
 
 static inline int
@@ -143,6 +178,29 @@ ext4_expand_extra_isize_ea(struct inode *inode, int new_extra_isize,
 
 #define ext4_xattr_handlers    NULL
 
+static inline int
+ext4_xattr_ibody_find(struct inode *inode, struct ext4_xattr_info *i,
+                     struct ext4_xattr_ibody_find *is)
+{
+       return -EOPNOTSUPP;
+}
+
+static inline int
+ext4_xattr_ibody_set(handle_t *handle, struct inode *inode,
+                    struct ext4_xattr_info *i,
+                    struct ext4_xattr_ibody_find *is)
+{
+       return -EOPNOTSUPP;
+}
+
+static inline int
+ext4_xattr_ibody_get(struct inode *inode, int name_index,
+                    const char *name,
+                    void *buffer, size_t buffer_size)
+{
+       return -EOPNOTSUPP;
+}
+
 # endif  /* CONFIG_EXT4_FS_XATTR */
 
 #ifdef CONFIG_EXT4_FS_SECURITY