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-rw-r--r--fs/hpfs/map.c26
1 files changed, 26 insertions, 0 deletions
diff --git a/fs/hpfs/map.c b/fs/hpfs/map.c
index 442770edcdc7..a69bbc1e87f8 100644
--- a/fs/hpfs/map.c
+++ b/fs/hpfs/map.c
@@ -130,6 +130,32 @@ __le32 *hpfs_load_bitmap_directory(struct super_block *s, secno bmp)
return b;
}
+void hpfs_load_hotfix_map(struct super_block *s, struct hpfs_spare_block *spareblock)
+{
+ struct quad_buffer_head qbh;
+ u32 *directory;
+ u32 n_hotfixes, n_used_hotfixes;
+ unsigned i;
+
+ n_hotfixes = le32_to_cpu(spareblock->n_spares);
+ n_used_hotfixes = le32_to_cpu(spareblock->n_spares_used);
+
+ if (n_hotfixes > 256 || n_used_hotfixes > n_hotfixes) {
+ hpfs_error(s, "invalid number of hotfixes: %u, used: %u", n_hotfixes, n_used_hotfixes);
+ return;
+ }
+ if (!(directory = hpfs_map_4sectors(s, le32_to_cpu(spareblock->hotfix_map), &qbh, 0))) {
+ hpfs_error(s, "can't load hotfix map");
+ return;
+ }
+ for (i = 0; i < n_used_hotfixes; i++) {
+ hpfs_sb(s)->hotfix_from[i] = le32_to_cpu(directory[i]);
+ hpfs_sb(s)->hotfix_to[i] = le32_to_cpu(directory[n_hotfixes + i]);
+ }
+ hpfs_sb(s)->n_hotfixes = n_used_hotfixes;
+ hpfs_brelse4(&qbh);
+}
+
/*
* Load fnode to memory
*/

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