[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>
diff --git a/fs/cifs/misc.c b/fs/cifs/misc.c
index 7b38d30..f2a0260 100644
--- a/fs/cifs/misc.c
+++ b/fs/cifs/misc.c
@@ -514,3 +514,72 @@
printk( " | %s\n", debug_line);
return;
}
+
+#ifdef CONFIG_CIFS_EXPERIMENTAL
+/* Windows maps these to the user defined 16 bit Unicode range since they are
+ reserved symbols (along with \ and /), otherwise illegal to store
+ in filenames in NTFS */
+#define UNI_ASTERIK cpu_to_le16('*' + 0xF000)
+#define UNI_QUESTION cpu_to_le16('?' + 0xF000)
+#define UNI_COLON cpu_to_le16(':' + 0xF000)
+#define UNI_GRTRTHAN cpu_to_le16('>' + 0xF000)
+#define UNI_LESSTHAN cpu_to_le16('<' + 0xF000)
+#define UNI_PIPE cpu_to_le16('|' + 0xF000)
+#define UNI_SLASH cpu_to_le16('\\' + 0xF000)
+
+/* Convert 16 bit Unicode pathname from wire format to string in current code
+ page. Conversion may involve remapping up the seven characters that are
+ only legal in POSIX-like OS (if they are present in the string). Path
+ names are little endian 16 bit Unicode on the wire */
+int
+cifs_convertUCSpath(char *target, const __le16 * source, int maxlen,
+ const struct nls_table * cp)
+{
+ int i,j,len;
+ wchar_t src_char;
+
+ for(i = 0, j = 0; i < maxlen; i++) {
+ src_char = le16_to_cpu(source[i]);
+ switch (src_char) {
+ case 0:
+ goto cUCS_out; /* BB check this BB */
+ case UNI_COLON:
+ target[j] = ':';
+ break;
+ case UNI_ASTERIK:
+ target[j] = '*';
+ break;
+ case UNI_QUESTION:
+ target[j] = '?';
+ break;
+ case UNI_SLASH:
+ target[j] = '\\'; /* BB check this - is there risk here of converting path sep BB */
+ break;
+ case UNI_PIPE:
+ target[j] = '|';
+ break;
+ case UNI_GRTRTHAN:
+ target[j] = '>';
+ break;
+ case UNI_LESSTHAN:
+ target[j] = '<';
+ default:
+ len = cp->uni2char(src_char, &target[j],
+ NLS_MAX_CHARSET_SIZE);
+ if(len > 0) {
+ j += len;
+ continue;
+ } else {
+ target[j] = '?';
+ }
+ }
+ j++;
+ /* check to make sure we do not overrun callers allocated temp buffer */
+ if(j >= (2 * NAME_MAX))
+ break;
+ }
+cUCS_out:
+ target[j] = 0;
+ return j;
+}
+#endif /* CIFS_EXPERIMENTAL */