From 3a10e07234e5f545ca70088e99f27d6098201449 Mon Sep 17 00:00:00 2001
From: AKASHI Takahiro <takahiro.akashi@linaro.org>
Date: Tue, 11 Sep 2018 15:59:09 +0900
Subject: [PATCH] fs: fat: remember the starting cluster number of directory
The starting cluster number of directory is needed to initialize ".."
(parent directory) entry when creating a new directory.
Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
Signed-off-by: Alexander Graf <agraf@suse.de>
---
fs/fat/fat.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/fs/fat/fat.c b/fs/fat/fat.c
index 6d7012c841..73ffdeae63 100644
--- a/fs/fat/fat.c
+++ b/fs/fat/fat.c
@@ -631,6 +631,7 @@ static int get_fs_info(fsdata *mydata)
typedef struct {
fsdata *fsdata; /* filesystem parameters */
+ unsigned start_clust; /* first cluster */
unsigned clust; /* current cluster */
unsigned next_clust; /* next cluster if remaining == 0 */
int last_cluster; /* set once we've read last cluster */
@@ -663,6 +664,7 @@ static int fat_itr_root(fat_itr *itr, fsdata *fsdata)
return -ENXIO;
itr->fsdata = fsdata;
+ itr->start_clust = 0;
itr->clust = fsdata->root_cluster;
itr->next_clust = fsdata->root_cluster;
itr->dent = NULL;
@@ -698,6 +700,7 @@ static void fat_itr_child(fat_itr *itr, fat_itr *parent)
assert(fat_itr_isdir(parent));
itr->fsdata = parent->fsdata;
+ itr->start_clust = clustnum;
if (clustnum > 0) {
itr->clust = clustnum;
itr->next_clust = clustnum;
--
2.39.5