Signed-off-by: Stefan Metzmacher <metze@xxxxxxxxx>
---
fs/cifs/link.c | 42 ++++++++++++++++++++++++++++++++++++++++++
1 files changed, 42 insertions(+), 0 deletions(-)
diff --git a/fs/cifs/link.c b/fs/cifs/link.c
index 6d00712..89e09da 100644
--- a/fs/cifs/link.c
+++ b/fs/cifs/link.c
@@ -92,6 +92,48 @@ 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;
+}
+
+static int
CIFSCreateMFSymLink(const int xid, struct cifsTconInfo *tcon,
const char *fromName, const char *toName,
const struct nls_table *nls_codepage)
--
1.7.0.4
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