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fs: fat: set start cluster for root directory

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When iterating over a child directory we set itr->start_clust.
Do the same when over the root directory.

When looking for deleted directory entries or existing short names we will
have to iterate over directories a second and third time. With this patch
we do not need any special logic for the root directory.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
This commit is contained in:
Heinrich Schuchardt
2020-11-22 16:04:47 +01:00
parent 27ed690382
commit 7557c84855
1 changed files with 3 additions and 1 deletions
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4
fs/fat/fat.c
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@@ -734,7 +734,7 @@ static int fat_itr_root(fat_itr *itr, fsdata *fsdata)
return -ENXIO; return -ENXIO;
itr->fsdata = fsdata; itr->fsdata = fsdata;
itr->start_clust = 0; itr->start_clust = fsdata->root_cluster;
itr->clust = fsdata->root_cluster; itr->clust = fsdata->root_cluster;
itr->next_clust = fsdata->root_cluster; itr->next_clust = fsdata->root_cluster;
itr->dent = NULL; itr->dent = NULL;
@@ -778,6 +778,7 @@ static void fat_itr_child(fat_itr *itr, fat_itr *parent)
} else { } else {
itr->clust = parent->fsdata->root_cluster; itr->clust = parent->fsdata->root_cluster;
itr->next_clust = parent->fsdata->root_cluster; itr->next_clust = parent->fsdata->root_cluster;
itr->start_clust = parent->fsdata->root_cluster;
itr->is_root = 1; itr->is_root = 1;
} }
itr->dent = NULL; itr->dent = NULL;
@@ -1067,6 +1068,7 @@ static int fat_itr_resolve(fat_itr *itr, const char *path, unsigned type)
/* point back to itself */ /* point back to itself */
itr->clust = itr->fsdata->root_cluster; itr->clust = itr->fsdata->root_cluster;
itr->next_clust = itr->fsdata->root_cluster; itr->next_clust = itr->fsdata->root_cluster;
itr->start_clust = itr->fsdata->root_cluster;
itr->dent = NULL; itr->dent = NULL;
itr->remaining = 0; itr->remaining = 0;
itr->last_cluster = 0; itr->last_cluster = 0;