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fs: fat: remember the starting cluster number of directory

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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>
This commit is contained in:
AKASHI Takahiro 2018-09-11 15:59:09 +09:00 committed by Alexander Graf
parent e7074cffb8
commit 3a10e07234
1 changed files with 3 additions and 0 deletions
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3
fs/fat/fat.c
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@ -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;