cifs: implement CIFSCreateMFSymLink()

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

1 files changed, 45 insertions, 0 deletions

diff --git a/fs/cifs/link.c b/fs/cifs/link.c
index 0473a86031a5..1b2a8c971995 100644
--- 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)