ext2: convert to new i_version API

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Reviewed-by: Jan Kara <jack@suse.cz>

fs/ext2/dir.c

@@ -26,6 +26,7 @@
 #include <linux/buffer_head.h>
 #include <linux/pagemap.h>
 #include <linux/swap.h>
+#include <linux/iversion.h>
 
 typedef struct ext2_dir_entry_2 ext2_dirent;
 
@@ -92,7 +93,7 @@ static int ext2_commit_chunk(struct page *page, loff_t pos, unsigned len)
 	struct inode *dir = mapping->host;
 	int err = 0;
 
-	dir->i_version++;
+	inode_inc_iversion(dir);
 	block_write_end(NULL, mapping, pos, len, len, page, NULL);
 
 	if (pos+len > dir->i_size) {
@@ -293,7 +294,7 @@ ext2_readdir(struct file *file, struct dir_context *ctx)
 	unsigned long npages = dir_pages(inode);
 	unsigned chunk_mask = ~(ext2_chunk_size(inode)-1);
 	unsigned char *types = NULL;
-	int need_revalidate = file->f_version != inode->i_version;
+	bool need_revalidate = inode_cmp_iversion(inode, file->f_version);
 
 	if (pos > inode->i_size - EXT2_DIR_REC_LEN(1))
 		return 0;
@@ -319,8 +320,8 @@ ext2_readdir(struct file *file, struct dir_context *ctx)
 				offset = ext2_validate_entry(kaddr, offset, chunk_mask);
 				ctx->pos = (n<<PAGE_SHIFT) + offset;
 			}
-			file->f_version = inode->i_version;
-			need_revalidate = 0;
+			file->f_version = inode_query_iversion(inode);
+			need_revalidate = false;
 		}
 		de = (ext2_dirent *)(kaddr+offset);
 		limit = kaddr + ext2_last_byte(inode, n) - EXT2_DIR_REC_LEN(1);

fs/ext2/super.c

@@ -33,6 +33,7 @@
 #include <linux/quotaops.h>
 #include <linux/uaccess.h>
 #include <linux/dax.h>
+#include <linux/iversion.h>
 #include "ext2.h"
 #include "xattr.h"
 #include "acl.h"
@@ -184,7 +185,7 @@ static struct inode *ext2_alloc_inode(struct super_block *sb)
 	if (!ei)
 		return NULL;
 	ei->i_block_alloc_info = NULL;
-	ei->vfs_inode.i_version = 1;
+	inode_set_iversion(&ei->vfs_inode, 1);
 #ifdef CONFIG_QUOTA
 	memset(&ei->i_dquot, 0, sizeof(ei->i_dquot));
 #endif
@@ -1569,7 +1570,7 @@ static ssize_t ext2_quota_write(struct super_block *sb, int type,
 		return err;
 	if (inode->i_size < off+len-towrite)
 		i_size_write(inode, off+len-towrite);
-	inode->i_version++;
+	inode_inc_iversion(inode);
 	inode->i_mtime = inode->i_ctime = current_time(inode);
 	mark_inode_dirty(inode);
 	return len - towrite;