1 files changed, 23 insertions, 0 deletions

diff --git a/fs/fat/dir.c b/fs/fat/dir.c
index 165012ef363a..7a6f02caf286 100644
--- a/fs/fat/dir.c
+++ b/fs/fat/dir.c
@@ -964,6 +964,29 @@ int fat_scan(struct inode *dir, const unsigned char *name,
 }
 EXPORT_SYMBOL_GPL(fat_scan);
 
+/*
+ * Scans a directory for a given logstart.
+ * Returns an error code or zero.
+ */
+int fat_scan_logstart(struct inode *dir, int i_logstart,
+                      struct fat_slot_info *sinfo)
+{
+        struct super_block *sb = dir->i_sb;
+
+        sinfo->slot_off = 0;
+        sinfo->bh = NULL;
+        while (fat_get_short_entry(dir, &sinfo->slot_off, &sinfo->bh,
+                                   &sinfo->de) >= 0) {
+                if (fat_get_start(MSDOS_SB(sb), sinfo->de) == i_logstart) {
+                        sinfo->slot_off -= sizeof(*sinfo->de);
+                        sinfo->nr_slots = 1;
+                        sinfo->i_pos = fat_make_i_pos(sb, sinfo->bh, sinfo->de);
+                        return 0;
+                }
+        }
+        return -ENOENT;
+}
+
 static int __fat_remove_entries(struct inode *dir, loff_t pos, int nr_slots)
 {
         struct super_block *sb = dir->i_sb;