CIFS: Add SMB2 support for rename operation
Signed-off-by: Pavel Shilovsky <piastryyy@gmail.com>
Signed-off-by: Steve French <smfrench@gmail.com>
diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c
index 30c92c8..1dc11ce 100644
--- a/fs/cifs/smb2pdu.c
+++ b/fs/cifs/smb2pdu.c
@@ -1602,3 +1602,110 @@
}
return rc;
}
+
+static int
+send_set_info(const unsigned int xid, struct cifs_tcon *tcon,
+ u64 persistent_fid, u64 volatile_fid, int info_class,
+ unsigned int num, void **data, unsigned int *size)
+{
+ struct smb2_set_info_req *req;
+ struct smb2_set_info_rsp *rsp = NULL;
+ struct kvec *iov;
+ int rc = 0;
+ int resp_buftype;
+ unsigned int i;
+ struct TCP_Server_Info *server;
+ struct cifs_ses *ses = tcon->ses;
+
+ if (ses && (ses->server))
+ server = ses->server;
+ else
+ return -EIO;
+
+ if (!num)
+ return -EINVAL;
+
+ iov = kmalloc(sizeof(struct kvec) * num, GFP_KERNEL);
+ if (!iov)
+ return -ENOMEM;
+
+ rc = small_smb2_init(SMB2_SET_INFO, tcon, (void **) &req);
+ if (rc) {
+ kfree(iov);
+ return rc;
+ }
+
+ req->InfoType = SMB2_O_INFO_FILE;
+ req->FileInfoClass = info_class;
+ req->PersistentFileId = persistent_fid;
+ req->VolatileFileId = volatile_fid;
+
+ /* 4 for RFC1001 length and 1 for Buffer */
+ req->BufferOffset =
+ cpu_to_le16(sizeof(struct smb2_set_info_req) - 1 - 4);
+ req->BufferLength = cpu_to_le32(*size);
+
+ inc_rfc1001_len(req, *size - 1 /* Buffer */);
+
+ memcpy(req->Buffer, *data, *size);
+
+ iov[0].iov_base = (char *)req;
+ /* 4 for RFC1001 length */
+ iov[0].iov_len = get_rfc1002_length(req) + 4;
+
+ for (i = 1; i < num; i++) {
+ inc_rfc1001_len(req, size[i]);
+ le32_add_cpu(&req->BufferLength, size[i]);
+ iov[i].iov_base = (char *)data[i];
+ iov[i].iov_len = size[i];
+ }
+
+ rc = SendReceive2(xid, ses, iov, num, &resp_buftype, 0);
+ rsp = (struct smb2_set_info_rsp *)iov[0].iov_base;
+
+ if (rc != 0) {
+ cifs_stats_fail_inc(tcon, SMB2_SET_INFO_HE);
+ goto out;
+ }
+
+ if (rsp == NULL) {
+ rc = -EIO;
+ goto out;
+ }
+
+out:
+ free_rsp_buf(resp_buftype, rsp);
+ kfree(iov);
+ return rc;
+}
+
+int
+SMB2_rename(const unsigned int xid, struct cifs_tcon *tcon,
+ u64 persistent_fid, u64 volatile_fid, __le16 *target_file)
+{
+ struct smb2_file_rename_info info;
+ void **data;
+ unsigned int size[2];
+ int rc;
+ int len = (2 * UniStrnlen((wchar_t *)target_file, PATH_MAX));
+
+ data = kmalloc(sizeof(void *) * 2, GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+
+ info.ReplaceIfExists = 1; /* 1 = replace existing target with new */
+ /* 0 = fail if target already exists */
+ info.RootDirectory = 0; /* MBZ for network ops (why does spec say?) */
+ info.FileNameLength = cpu_to_le32(len);
+
+ data[0] = &info;
+ size[0] = sizeof(struct smb2_file_rename_info);
+
+ data[1] = target_file;
+ size[1] = len + 2 /* null */;
+
+ rc = send_set_info(xid, tcon, persistent_fid, volatile_fid,
+ FILE_RENAME_INFORMATION, 2, data, size);
+ kfree(data);
+ return rc;
+}