cifs: implement CIFSCreateMFSymLink()

Signed-off-by: Stefan Metzmacher <metze@samba.org>
Signed-off-by: Steve French <sfrench@us.ibm.com>

diff --git a/fs/cifs/link.c b/fs/cifs/link.c
index 0473a86031a5ea189cb66e236b06deeb27d94332..1b2a8c97199541ace5dc9aba230780d7bcf5cca4 100644 (file)
--- a/fs/cifs/link.c
+++ b/fs/cifs/link.c
@@ -133,6 +133,51 @@ CIFSFormatMFSymlink(u8 *buf, unsigned int buf_len, const char *link_str)
        return 0;
 }
 
+static int
+CIFSCreateMFSymLink(const int xid, struct cifsTconInfo *tcon,
+                   const char *fromName, const char *toName,
+                   const struct nls_table *nls_codepage, int remap)
+{
+       int rc;
+       int oplock = 0;
+       __u16 netfid = 0;
+       u8 *buf;
+       unsigned int bytes_written = 0;
+
+       buf = kmalloc(CIFS_MF_SYMLINK_FILE_SIZE, GFP_KERNEL);
+       if (!buf)
+               return -ENOMEM;
+
+       rc = CIFSFormatMFSymlink(buf, CIFS_MF_SYMLINK_FILE_SIZE, toName);
+       if (rc != 0) {
+               kfree(buf);
+               return rc;
+       }
+
+       rc = CIFSSMBOpen(xid, tcon, fromName, FILE_CREATE, GENERIC_WRITE,
+                        CREATE_NOT_DIR, &netfid, &oplock, NULL,
+                        nls_codepage, remap);
+       if (rc != 0) {
+               kfree(buf);
+               return rc;
+       }
+
+       rc = CIFSSMBWrite(xid, tcon, netfid,
+                         CIFS_MF_SYMLINK_FILE_SIZE /* length */,
+                         0 /* offset */,
+                         &bytes_written, buf, NULL, 0);
+       CIFSSMBClose(xid, tcon, netfid);
+       kfree(buf);
+       if (rc != 0)
+               return rc;
+
+       if (bytes_written != CIFS_MF_SYMLINK_FILE_SIZE)
+               return -EIO;
+
+       return 0;
+}
+
+static int
 CIFSQueryMFSymLink(const int xid, struct cifsTconInfo *tcon,
                   const unsigned char *searchName, char **symlinkinfo,
                   const struct nls_table *nls_codepage, int remap)