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author | Pavel Shilovsky <piastry@etersoft.ru> | 2011-12-26 22:58:46 +0400 |
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committer | Pavel Shilovsky <pshilovsky@samba.org> | 2012-07-24 21:55:05 +0400 |
commit | 2503a0dba989486c59523a947a1dcb50ad90fee9 (patch) | |
tree | 1e79a740d744cee1a1981e4d0a355303ffc9a4d2 /fs/cifs/cifs_unicode.c | |
parent | 68889f269b16a11866f4ec71e8177bdd0c184a3f (diff) | |
download | linux-stable-2503a0dba989486c59523a947a1dcb50ad90fee9.tar.gz linux-stable-2503a0dba989486c59523a947a1dcb50ad90fee9.tar.bz2 linux-stable-2503a0dba989486c59523a947a1dcb50ad90fee9.zip |
CIFS: Add SMB2 support for is_path_accessible
that needs for a successful mount through SMB2 protocol.
Signed-off-by: Pavel Shilovsky <piastry@etersoft.ru>
Signed-off-by: Steve French <smfrench@gmail.com>
Diffstat (limited to 'fs/cifs/cifs_unicode.c')
-rw-r--r-- | fs/cifs/cifs_unicode.c | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/fs/cifs/cifs_unicode.c b/fs/cifs/cifs_unicode.c index 97c1d4210869..7dab9c04ad52 100644 --- a/fs/cifs/cifs_unicode.c +++ b/fs/cifs/cifs_unicode.c @@ -330,3 +330,64 @@ cifsConvertToUTF16(__le16 *target, const char *source, int srclen, ctoUTF16_out: return i; } + +#ifdef CONFIG_CIFS_SMB2 +/* + * cifs_local_to_utf16_bytes - how long will a string be after conversion? + * @from - pointer to input string + * @maxbytes - don't go past this many bytes of input string + * @codepage - source codepage + * + * Walk a string and return the number of bytes that the string will + * be after being converted to the given charset, not including any null + * termination required. Don't walk past maxbytes in the source buffer. + */ + +static int +cifs_local_to_utf16_bytes(const char *from, int len, + const struct nls_table *codepage) +{ + int charlen; + int i; + wchar_t wchar_to; + + for (i = 0; len && *from; i++, from += charlen, len -= charlen) { + charlen = codepage->char2uni(from, len, &wchar_to); + /* Failed conversion defaults to a question mark */ + if (charlen < 1) + charlen = 1; + } + return 2 * i; /* UTF16 characters are two bytes */ +} + +/* + * cifs_strndup_to_utf16 - copy a string to wire format from the local codepage + * @src - source string + * @maxlen - don't walk past this many bytes in the source string + * @utf16_len - the length of the allocated string in bytes (including null) + * @cp - source codepage + * @remap - map special chars + * + * Take a string convert it from the local codepage to UTF16 and + * put it in a new buffer. Returns a pointer to the new string or NULL on + * error. + */ +__le16 * +cifs_strndup_to_utf16(const char *src, const int maxlen, int *utf16_len, + const struct nls_table *cp, int remap) +{ + int len; + __le16 *dst; + + len = cifs_local_to_utf16_bytes(src, maxlen, cp); + len += 2; /* NULL */ + dst = kmalloc(len, GFP_KERNEL); + if (!dst) { + *utf16_len = 0; + return NULL; + } + cifsConvertToUTF16(dst, src, strlen(src), cp, remap); + *utf16_len = len; + return dst; +} +#endif /* CONFIG_CIFS_SMB2 */ |