[PATCH] cifs: finish up of special character mapping capable unicode conversion routine part 2 of 3

Signed-off-by: Steve French (sfrench@us.ibm.com)
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 75 insertions, 5 deletions

diff --git a/fs/cifs/misc.c b/fs/cifs/misc.c
index f2a026073b6..6d7bb427e4f 100644
--- a/fs/cifs/misc.c
+++ b/fs/cifs/misc.c
@@ -28,6 +28,7 @@
 #include "cifs_debug.h"
 #include "smberr.h"
 #include "nterr.h"
+#include "cifs_unicode.h"
 
 extern mempool_t *cifs_sm_req_poolp;
 extern mempool_t *cifs_req_poolp;
@@ -515,7 +516,6 @@ dump_smb(struct smb_hdr *smb_buf, int smb_buf_length)
 	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 */
@@ -552,9 +552,12 @@ cifs_convertUCSpath(char *target, const __le16 * source, int maxlen,
 			case UNI_QUESTION:
 				target[j] = '?';
 				break;
-			case UNI_SLASH:
-				target[j] = '\\'; /* BB check this - is there risk here of converting path sep BB */
-				break;
+			/* BB We can not handle remapping slash until
+			   all the calls to build_path_from_dentry
+			   are modified, as they use slash as separator BB */
+			/* case UNI_SLASH:
+				target[j] = '\\';
+				break;*/
 			case UNI_PIPE:
 				target[j] = '|';
 				break;
@@ -582,4 +585,71 @@ cUCS_out:
 	target[j] = 0;
 	return j;
 }
-#endif /* CIFS_EXPERIMENTAL */
+
+/* Convert 16 bit Unicode pathname to wire format from 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
+cifsConvertToUCS(__le16 * target, const char *source, int maxlen, 
+		 const struct nls_table * cp, int mapChars)
+{
+	int i,j,charlen;
+	int len_remaining = maxlen;
+	char src_char;
+
+	if(!mapChars) 
+		return cifs_strtoUCS((wchar_t *) target, source, PATH_MAX, cp);	
+
+	for(i = 0, j = 0; i < maxlen; j++) {
+		src_char = source[i];
+		switch (src_char) {
+			case 0:
+				goto ctoUCS_out;
+			case ':':
+				target[j] = cpu_to_le16(UNI_COLON);
+				break;
+			case '*':
+				target[j] = cpu_to_le16(UNI_ASTERIK);
+				break;
+			case '?':
+				target[j] = cpu_to_le16(UNI_QUESTION);
+				break;
+			case '<':
+				target[j] = cpu_to_le16(UNI_LESSTHAN);
+				break;
+			case '>':
+				target[j] = cpu_to_le16(UNI_GRTRTHAN);
+				break;
+			case '|':
+				target[j] = cpu_to_le16(UNI_PIPE);
+				break;			
+			/* BB We can not handle remapping slash until
+			   all the calls to build_path_from_dentry
+			   are modified, as they use slash as separator BB */
+			/* case '\\':
+				target[j] = cpu_to_le16(UNI_SLASH);
+				break;*/
+			default:
+				charlen = cp->char2uni(source+i,
+					len_remaining, target+j);
+				/* if no match, use question mark, which
+				at least in some cases servers as wild card */
+				if(charlen < 1) {
+					target[j] = cpu_to_le16(0x003f);
+					charlen = 1;
+				}
+				len_remaining -= charlen;
+				/* character may take more than one byte in the
+				   the source string, but will take exactly two
+				   bytes in the target string */
+				i+= charlen;
+				continue;
+		}
+		i++; /* move to next char in source string */
+		len_remaining--;
+	}
+
+ctoUCS_out:
+	return i;
+}