[PATCH] cifs: Add new mount parm mapchars

For handling seven special characters that shells use for filenames.

This first parts implements conversions from Unicode. 

Signed-off-by: Steve French
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 13 insertions, 2 deletions

diff --git a/fs/cifs/readdir.c b/fs/cifs/readdir.c
index 07838a5ba3a1..4a33add24d53 100644
--- a/fs/cifs/readdir.c
+++ b/fs/cifs/readdir.c
@@ -600,7 +600,14 @@ static int cifs_get_name_from_search_buf(struct qstr *pqst,
         if(unicode) {
                 /* BB fixme - test with long names */
                 /* Note converted filename can be longer than in unicode */
-                pqst->len = cifs_strfromUCS_le((char *)pqst->name,(wchar_t *)filename,len/2,nlt);
+#ifdef CONFIG_CIFS_EXPERIMENTAL
+                if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR)
+                        pqst->len = cifs_convertUCSpath((char *)pqst->name,
+                                        (__le16 *)filename, len/2, nlt);
+                else
+#endif /* CIFS_EXPERIMENTAL */
+                        pqst->len = cifs_strfromUCS_le((char *)pqst->name,
+                                        (wchar_t *)filename,len/2,nlt);
         } else {
                 pqst->name = filename;
                 pqst->len = len;
@@ -829,7 +836,11 @@ int cifs_readdir(struct file *file, void *direntry, filldir_t filldir)
                 end_of_smb = cifsFile->srch_inf.ntwrk_buf_start +
                         smbCalcSize((struct smb_hdr *)
                                     cifsFile->srch_inf.ntwrk_buf_start);
-                tmp_buf = kmalloc(NAME_MAX+1,GFP_KERNEL);
+                /* To be safe - for UCS to UTF-8 with strings loaded
+                with the rare long characters alloc more to account for
+                such multibyte target UTF-8 characters. cifs_unicode.c,
+                which actually does the conversion, has the same limit */
+                tmp_buf = kmalloc((2 * NAME_MAX) + 4, GFP_KERNEL);
                 for(i=0;(i<num_to_fill) && (rc == 0);i++) {
                         if(current_entry == NULL) {
                                 /* evaluate whether this case is an error */