luck/tmp_suning_uos_patched
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Allow conversion of characters in Mac remap range (part 2)

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The previous patch allowed remapping reserved characters from directory
listenings, this patch adds conversion the other direction, allowing
opening of files with any of the seven reserved characters.

Signed-off-by: Steve French <smfrench@gmail.com>
Reviewed-by: Shirish Pargaonkar <shirishpargaonkar@gmail.com>
This commit is contained in:
Steve French 2014-09-25 14:01:34 -05:00
parent b693855fe6
commit a4153cb1d3
2 changed files with 83 additions and 26 deletions
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97
fs/cifs/cifs_unicode.c
View File

@ -319,6 +319,66 @@ cifs_strndup_from_utf16(const char *src, const int maxlen,
return dst;
}
static __le16 convert_to_sfu_char(char src_char)
{
__le16 dest_char;
switch (src_char) {
case ':':
dest_char = cpu_to_le16(UNI_COLON);
break;
case '*':
dest_char = cpu_to_le16(UNI_ASTERISK);
break;
case '?':
dest_char = cpu_to_le16(UNI_QUESTION);
break;
case '<':
dest_char = cpu_to_le16(UNI_LESSTHAN);
break;
case '>':
dest_char = cpu_to_le16(UNI_GRTRTHAN);
break;
case '|':
dest_char = cpu_to_le16(UNI_PIPE);
break;
default:
dest_char = 0;
}
return dest_char;
}
static __le16 convert_to_sfm_char(char src_char)
{
__le16 dest_char;
switch (src_char) {
case ':':
dest_char = cpu_to_le16(SFM_COLON);
break;
case '*':
dest_char = cpu_to_le16(SFM_ASTERISK);
break;
case '?':
dest_char = cpu_to_le16(SFM_QUESTION);
break;
case '<':
dest_char = cpu_to_le16(SFM_LESSTHAN);
break;
case '>':
dest_char = cpu_to_le16(SFM_GRTRTHAN);
break;
case '|':
dest_char = cpu_to_le16(SFM_PIPE);
break;
default:
dest_char = 0;
}
return dest_char;
}
/*
* Convert 16 bit Unicode pathname to wire format from string in current code
* page. Conversion may involve remapping up the six characters that are
@ -327,7 +387,7 @@ cifs_strndup_from_utf16(const char *src, const int maxlen,
*/
int
cifsConvertToUTF16(__le16 *target, const char *source, int srclen,
const struct nls_table *cp, int mapChars)
const struct nls_table *cp, int map_chars)
{
int i, charlen;
int j = 0;
@ -335,39 +395,30 @@ cifsConvertToUTF16(__le16 *target, const char *source, int srclen,
__le16 dst_char;
wchar_t tmp;
if (!mapChars)
if (map_chars == NO_MAP_UNI_RSVD)
return cifs_strtoUTF16(target, source, PATH_MAX, cp);
for (i = 0; i < srclen; j++) {
src_char = source[i];
charlen = 1;
switch (src_char) {
case 0:
/* check if end of string */
if (src_char == 0)
goto ctoUTF16_out;
case ':':
dst_char = cpu_to_le16(UNI_COLON);
break;
case '*':
dst_char = cpu_to_le16(UNI_ASTERISK);
break;
case '?':
dst_char = cpu_to_le16(UNI_QUESTION);
break;
case '<':
dst_char = cpu_to_le16(UNI_LESSTHAN);
break;
case '>':
dst_char = cpu_to_le16(UNI_GRTRTHAN);
break;
case '|':
dst_char = cpu_to_le16(UNI_PIPE);
break;
/* see if we must remap this char */
if (map_chars == SFU_MAP_UNI_RSVD)
dst_char = convert_to_sfu_char(src_char);
else if (map_chars == SFM_MAP_UNI_RSVD)
dst_char = convert_to_sfm_char(src_char);
else
dst_char = 0;
/*
* FIXME: We can not handle remapping backslash (UNI_SLASH)
* until all the calls to build_path_from_dentry are modified,
* as they use backslash as separator.
*/
default:
if (dst_char == 0) {
charlen = cp->char2uni(source + i, srclen - i, &tmp);
dst_char = cpu_to_le16(tmp);

12
fs/cifs/smb2misc.c
View File

@ -379,6 +379,14 @@ cifs_convert_path_to_utf16(const char *from, struct cifs_sb_info *cifs_sb)
int len;
const char *start_of_path;
__le16 *to;
int map_type;
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SFM_CHR)
map_type = SFM_MAP_UNI_RSVD;
else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR)
map_type = SFU_MAP_UNI_RSVD;
else
map_type = NO_MAP_UNI_RSVD;
/* Windows doesn't allow paths beginning with \ */
if (from[0] == '\\')
@ -386,9 +394,7 @@ cifs_convert_path_to_utf16(const char *from, struct cifs_sb_info *cifs_sb)
else
start_of_path = from;
to = cifs_strndup_to_utf16(start_of_path, PATH_MAX, &len,
cifs_sb->local_nls,
cifs_sb->mnt_cifs_flags &
CIFS_MOUNT_MAP_SPECIAL_CHR);
cifs_sb->local_nls, map_type);
return to;
}