diff options
| -rw-r--r-- | fs/cifs/cifs_unicode.c | 31 | ||||
| -rw-r--r-- | fs/cifs/cifs_unicode.h | 2 | ||||
| -rw-r--r-- | fs/cifs/cifssmb.c | 25 |
3 files changed, 35 insertions, 23 deletions
diff --git a/fs/cifs/cifs_unicode.c b/fs/cifs/cifs_unicode.c index 8389f359b03d..614512573c67 100644 --- a/fs/cifs/cifs_unicode.c +++ b/fs/cifs/cifs_unicode.c @@ -26,6 +26,37 @@ #include "cifs_debug.h" /* + * cifs_ucs2_bytes - how long will a string be after conversion? + * @ucs - pointer to input string + * @maxbytes - don't go past this many bytes of input string + * @codepage - destination codepage + * + * Walk a ucs2le 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. + */ +int +cifs_ucs2_bytes(const __le16 *from, int maxbytes, + const struct nls_table *codepage) +{ + int i; + int charlen, outlen = 0; + int maxwords = maxbytes / 2; + char tmp[NLS_MAX_CHARSET_SIZE]; + + for (i = 0; from[i] && i < maxwords; i++) { + charlen = codepage->uni2char(le16_to_cpu(from[i]), tmp, + NLS_MAX_CHARSET_SIZE); + if (charlen > 0) + outlen += charlen; + else + outlen++; + } + + return outlen; +} + +/* * cifs_mapchar - convert a little-endian char to proper char in codepage * @target - where converted character should be copied * @src_char - 2 byte little-endian source character diff --git a/fs/cifs/cifs_unicode.h b/fs/cifs/cifs_unicode.h index 6aa6533e49fa..1857f5ff9337 100644 --- a/fs/cifs/cifs_unicode.h +++ b/fs/cifs/cifs_unicode.h @@ -74,6 +74,8 @@ extern struct UniCaseRange UniLowerRange[]; #ifdef __KERNEL__ int cifs_from_ucs2(char *to, const __le16 *from, int tolen, int fromlen, const struct nls_table *codepage, bool mapchar); +int cifs_ucs2_bytes(const __le16 *from, int maxbytes, + const struct nls_table *codepage); int cifs_strfromUCS_le(char *, const __le16 *, int, const struct nls_table *); int cifs_strtoUCS(__le16 *, const char *, int, const struct nls_table *); #endif diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c index a02c43b3faf5..cadacae46b82 100644 --- a/fs/cifs/cifssmb.c +++ b/fs/cifs/cifssmb.c @@ -3928,27 +3928,6 @@ GetInodeNumOut: return rc; } -/* computes length of UCS string converted to host codepage - * @src: UCS string - * @maxlen: length of the input string in UCS characters - * (not in bytes) - * - * return: size of input string in host codepage - */ -static int hostlen_fromUCS(const __le16 *src, const int maxlen, - const struct nls_table *nls_codepage) { - int i; - int hostlen = 0; - char to[4]; - int charlen; - for (i = 0; (i < maxlen) && src[i]; ++i) { - charlen = nls_codepage->uni2char(le16_to_cpu(src[i]), - to, NLS_MAX_CHARSET_SIZE); - hostlen += charlen > 0 ? charlen : 1; - } - return hostlen; -} - /* parses DFS refferal V3 structure * caller is responsible for freeing target_nodes * returns: @@ -4016,8 +3995,8 @@ parse_DFS_referrals(TRANSACTION2_GET_DFS_REFER_RSP *pSMBr, GFP_KERNEL); cifsConvertToUCS((__le16 *) tmp, searchName, PATH_MAX, nls_codepage, remap); - node->path_consumed = hostlen_fromUCS(tmp, - le16_to_cpu(pSMBr->PathConsumed)/2, + node->path_consumed = cifs_ucs2_bytes(tmp, + le16_to_cpu(pSMBr->PathConsumed), nls_codepage); kfree(tmp); } else |