erofs: make the size of read data stored in buffer_ofs

Since now xattr_iter structures have been unified, make the size of the
read data stored in buffer_ofs.  Don't bother reusing buffer_size for
this use, which may be confusing.

This is in preparation for the following further cleanup.

Signed-off-by: Jingbo Xu <jefflexu@linux.alibaba.com>
Reviewed-by: Gao Xiang <hsiangkao@linux.alibaba.com>
Link: https://lore.kernel.org/r/20230613074114.120115-4-jefflexu@linux.alibaba.com
Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>

diff --git a/fs/erofs/xattr.c b/fs/erofs/xattr.c
index b2802121e3aa7f7e4089af7961ea340d2d9b4395..8a114c7b6c662117cf313715ab500c53c239de30 100644 (file)
--- a/fs/erofs/xattr.c
+++ b/fs/erofs/xattr.c
@@ -315,7 +315,7 @@ static int xattr_checkbuffer(struct erofs_xattr_iter *it,
 {
        int err = it->buffer_size < value_sz ? -ERANGE : 0;
 
-       it->buffer_size = value_sz;
+       it->buffer_ofs = value_sz;
        return !it->buffer ? 1 : err;
 }
 
@@ -348,7 +348,7 @@ static int inline_getxattr(struct inode *inode, struct erofs_xattr_iter *it)
                if (ret != -ENOATTR)
                        break;
        }
-       return ret ? ret : it->buffer_size;
+       return ret ? ret : it->buffer_ofs;
 }
 
 static int shared_getxattr(struct inode *inode, struct erofs_xattr_iter *it)
@@ -371,7 +371,7 @@ static int shared_getxattr(struct inode *inode, struct erofs_xattr_iter *it)
                if (ret != -ENOATTR)
                        break;
        }
-       return ret ? ret : it->buffer_size;
+       return ret ? ret : it->buffer_ofs;
 }
 
 static bool erofs_xattr_user_list(struct dentry *dentry)