[PATCH 07/18] fs: fat: pass shortname to fill_dir_slot

[Heinrich Schuchardt]

Currently we pass the short name via the directory iterator.
Pass it explicitly as a parameter.

This removes the requirement to set the short name in the iterator before
writing the long name.

Signed-off-by: Heinrich Schuchardt <xypron.g...@gmx.de>
---
 fs/fat/fat_write.c | 20 ++++++++++++--------
 1 file changed, 12 insertions(+), 8 deletions(-)

diff --git a/fs/fat/fat_write.c b/fs/fat/fat_write.c
index 058b566629..7e8886791c 100644
--- a/fs/fat/fat_write.c
+++ b/fs/fat/fat_write.c
@@ -278,12 +278,16 @@ name11_12:
 static int new_dir_table(fat_itr *itr);
 static int flush_dir(fat_itr *itr);

-/*
- * Fill dir_slot entries with appropriate name, id, and attr
- * 'itr' will point to a next entry
+/**
+ * fill_dir_slot() - fill directory entries for long name
+ *
+ * @itr:       directory iterator
+ * @l_name:    long name
+ * @shortname: short name
+ * Return:     0 for success, -errno otherwise
  */
 static int
-fill_dir_slot(fat_itr *itr, const char *l_name)
+fill_dir_slot(fat_itr *itr, const char *l_name, const char *shortname)
 {
        __u8 temp_dir_slot_buffer[MAX_LFN_SLOT * sizeof(dir_slot)];
        dir_slot *slotptr = (dir_slot *)temp_dir_slot_buffer;
@@ -291,7 +295,7 @@ fill_dir_slot(fat_itr *itr, const char *l_name)
        int idx = 0, ret;

        /* Get short file name checksum value */
-       checksum = mkcksum(itr->dent->name, itr->dent->ext);
+       checksum = mkcksum(shortname, shortname + 8);

        do {
                memset(slotptr, 0x00, sizeof(dir_slot));
@@ -317,7 +321,7 @@ fill_dir_slot(fat_itr *itr, const char *l_name)
                if (!fat_itr_next(itr) && !itr->dent)
                        if ((itr->is_root && itr->fsdata->fatsize != 32) ||
                            new_dir_table(itr))
-                               return -1;
+                               return -EIO;
        }

        return 0;
@@ -1241,7 +1245,7 @@ int file_fat_write_at(const char *filename, loff_t pos, 
void *buffer,
                        goto exit;
                if (ret > 1) {
                        /* Set long name entries */
-                       ret = fill_dir_slot(itr, filename);
+                       ret = fill_dir_slot(itr, filename, itr->dent->name);
                        if (ret)
                                goto exit;
                }
@@ -1503,7 +1507,7 @@ int fat_mkdir(const char *new_dirname)
                        goto exit;
                if (ret > 1) {
                        /* Set long name entries */
-                       ret = fill_dir_slot(itr, dirname);
+                       ret = fill_dir_slot(itr, dirname, itr->dent->name);
                        if (ret)
                                goto exit;
                }
--
2.29.2