[PATCH] Make inode_ops->setxattr value parameter const

Patch from Andreas Gruenbacher <agruen@suse.de>

The setxattr inode operation is defined like this in 2.4 and 2.5:

        int (*setxattr) (struct dentry *dentry, const char *name,
                         void *value, size_t size, int flags);

the original type of the value parameter was `const void *'; the const
obviously has been lost at some point. The definition should be:

        int (*setxattr) (struct dentry *dentry, const char *name,
                         const void *value, size_t size, int flags);

fs/ext2/xattr.c

@@ -230,7 +230,7 @@ ext2_listxattr(struct dentry *dentry, char *buffer, size_t size)
  */
 int
 ext2_setxattr(struct dentry *dentry, const char *name,
-	      void *value, size_t size, int flags)
+	      const void *value, size_t size, int flags)
 {
 	struct ext2_xattr_handler *handler;
 	struct inode *inode = dentry->d_inode;

fs/ext2/xattr.h

@@ -67,7 +67,7 @@ struct ext2_xattr_handler {
 extern int ext2_xattr_register(int, struct ext2_xattr_handler *);
 extern void ext2_xattr_unregister(int, struct ext2_xattr_handler *);
 
-extern int ext2_setxattr(struct dentry *, const char *, void *, size_t, int);
+extern int ext2_setxattr(struct dentry *, const char *, const void *, size_t, int);
 extern ssize_t ext2_getxattr(struct dentry *, const char *, void *, size_t);
 extern ssize_t ext2_listxattr(struct dentry *, char *, size_t);
 extern int ext2_removexattr(struct dentry *, const char *);

fs/ext3/xattr.c

@@ -223,7 +223,7 @@ ext3_listxattr(struct dentry *dentry, char *buffer, size_t size)
  */
 int
 ext3_setxattr(struct dentry *dentry, const char *name,
-	      void *value, size_t size, int flags)
+	      const void *value, size_t size, int flags)
 {
 	struct ext3_xattr_handler *handler;
 	struct inode *inode = dentry->d_inode;

fs/ext3/xattr.h

@@ -66,7 +66,7 @@ struct ext3_xattr_handler {
 extern int ext3_xattr_register(int, struct ext3_xattr_handler *);
 extern void ext3_xattr_unregister(int, struct ext3_xattr_handler *);
 
-extern int ext3_setxattr(struct dentry *, const char *, void *, size_t, int);
+extern int ext3_setxattr(struct dentry *, const char *, const void *, size_t, int);
 extern ssize_t ext3_getxattr(struct dentry *, const char *, void *, size_t);
 extern ssize_t ext3_listxattr(struct dentry *, char *, size_t);
 extern int ext3_removexattr(struct dentry *, const char *);

fs/jfs/jfs_xattr.h

@@ -52,9 +52,9 @@ struct jfs_ea_list {
 #define	END_EALIST(ealist) \
 	((struct jfs_ea *) (((char *) (ealist)) + EALIST_SIZE(ealist)))
 
-extern int __jfs_setxattr(struct inode *, const char *, void *, size_t,
-			int);
-extern int jfs_setxattr(struct dentry *, const char *, void *, size_t,
+extern int __jfs_setxattr(struct inode *, const char *, const void *, size_t,
+			  int);
+extern int jfs_setxattr(struct dentry *, const char *, const void *, size_t,
 			int);
 extern ssize_t __jfs_getxattr(struct inode *, const char *, void *, size_t);
 extern ssize_t jfs_getxattr(struct dentry *, const char *, void *, size_t);

fs/jfs/xattr.c

@@ -706,7 +706,7 @@ static int can_set_system_xattr(struct inode *inode, const char *name,
 }
 
 static int can_set_xattr(struct inode *inode, const char *name,
-			 void *value, size_t value_len)
+			 const void *value, size_t value_len)
 {
 	if (IS_RDONLY(inode))
 		return -EROFS;
@@ -735,7 +735,7 @@ static int can_set_xattr(struct inode *inode, const char *name,
 #endif
 }
 
-int __jfs_setxattr(struct inode *inode, const char *name, void *value,
+int __jfs_setxattr(struct inode *inode, const char *name, const void *value,
 		   size_t value_len, int flags)
 {
 	struct jfs_ea_list *ealist;
@@ -874,7 +874,7 @@ int __jfs_setxattr(struct inode *inode, const char *name, void *value,
 	return rc;
 }
 
-int jfs_setxattr(struct dentry *dentry, const char *name, void *value,
+int jfs_setxattr(struct dentry *dentry, const char *name, const void *value,
 		 size_t value_len, int flags)
 {
 	if (value == NULL) {	/* empty EA, do not remove */

include/linux/fs.h

@@ -781,7 +781,7 @@ struct inode_operations {
 	int (*permission) (struct inode *, int);
 	int (*setattr) (struct dentry *, struct iattr *);
 	int (*getattr) (struct vfsmount *mnt, struct dentry *, struct kstat *);
-	int (*setxattr) (struct dentry *, const char *, void *, size_t, int);
+	int (*setxattr) (struct dentry *, const char *,const void *,size_t,int);
 	ssize_t (*getxattr) (struct dentry *, const char *, void *, size_t);
 	ssize_t (*listxattr) (struct dentry *, char *, size_t);
 	int (*removexattr) (struct dentry *, const char *);