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cifs: implement CIFSFormatMFSymlink()

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Signed-off-by: Stefan Metzmacher <metze@samba.org>
Signed-off-by: Steve French <sfrench@us.ibm.com>
This commit is contained in:
Stefan Metzmacher 2010-08-03 11:24:22 +02:00 committed by Steve French
parent 0fd43ae475
commit 18bddd1059
1 changed files with 41 additions and 0 deletions
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41
fs/cifs/link.c
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@ -92,6 +92,47 @@ CIFSParseMFSymlink(const u8 *buf,
}
static int
CIFSFormatMFSymlink(u8 *buf, unsigned int buf_len, const char *link_str)
{
unsigned int link_len;
unsigned int ofs;
struct MD5Context md5_ctx;
u8 md5_hash[16];
if (buf_len != CIFS_MF_SYMLINK_FILE_SIZE)
return -EINVAL;
link_len = strlen(link_str);
if (link_len > CIFS_MF_SYMLINK_LINK_MAXLEN)
return -ENAMETOOLONG;
cifs_MD5_init(&md5_ctx);
cifs_MD5_update(&md5_ctx, (const u8 *)link_str, link_len);
cifs_MD5_final(md5_hash, &md5_ctx);
snprintf(buf, buf_len,
CIFS_MF_SYMLINK_LEN_FORMAT CIFS_MF_SYMLINK_MD5_FORMAT,
link_len,
CIFS_MF_SYMLINK_MD5_ARGS(md5_hash));
ofs = CIFS_MF_SYMLINK_LINK_OFFSET;
memcpy(buf + ofs, link_str, link_len);
ofs += link_len;
if (ofs < CIFS_MF_SYMLINK_FILE_SIZE) {
buf[ofs] = '\n';
ofs++;
}
while (ofs < CIFS_MF_SYMLINK_FILE_SIZE) {
buf[ofs] = ' ';
ofs++;
}
return 0;
}
CIFSQueryMFSymLink(const int xid, struct cifsTconInfo *tcon,
const unsigned char *searchName, char **symlinkinfo,
const struct nls_table *nls_codepage, int remap)