linux-imx

/* SPDX-License-Identifier: GPL-2.0 */

#ifndef DRBD_STATE_H

#define DRBD_STATE_H

​

struct drbd_device;

struct drbd_connection;

​

/**

 * DOC: DRBD State macros

 *

 * These macros are used to express state changes in easily readable form.

 *

 * The NS macros expand to a mask and a value, that can be bit ored onto the

 * current state as soon as the spinlock (req_lock) was taken.

 *

 * The _NS macros are used for state functions that get called with the

 * spinlock. These macros expand directly to the new state value.

 *

 * Besides the basic forms NS() and _NS() additional _?NS[23] are defined

 * to express state changes that affect more than one aspect of the state.

 *

 * E.g. NS2(conn, C_CONNECTED, peer, R_SECONDARY)

 * Means that the network connection was established and that the peer

 * is in secondary role.

 */

#define role_MASK R_MASK

#define peer_MASK R_MASK

#define disk_MASK D_MASK

#define pdsk_MASK D_MASK

#define conn_MASK C_MASK

#define susp_MASK 1

#define user_isp_MASK 1

#define aftr_isp_MASK 1

#define susp_nod_MASK 1

#define susp_fen_MASK 1

​

#define NS(T, S) \

    ({ union drbd_state mask; mask.i = 0; mask.T = T##_MASK; mask; }), \

    ({ union drbd_state val; val.i = 0; val.T = (S); val; })

#define NS2(T1, S1, T2, S2) \

    ({ union drbd_state mask; mask.i = 0; mask.T1 = T1##_MASK; \

      mask.T2 = T2##_MASK; mask; }), \

    ({ union drbd_state val; val.i = 0; val.T1 = (S1); \

      val.T2 = (S2); val; })

#define NS3(T1, S1, T2, S2, T3, S3) \

    ({ union drbd_state mask; mask.i = 0; mask.T1 = T1##_MASK; \

      mask.T2 = T2##_MASK; mask.T3 = T3##_MASK; mask; }), \

    ({ union drbd_state val;  val.i = 0; val.T1 = (S1); \

      val.T2 = (S2); val.T3 = (S3); val; })

​

#define _NS(D, T, S) \

    D, ({ union drbd_state __ns; __ns = drbd_read_state(D); __ns.T = (S); __ns; })

#define _NS2(D, T1, S1, T2, S2) \

    D, ({ union drbd_state __ns; __ns = drbd_read_state(D); __ns.T1 = (S1); \

    __ns.T2 = (S2); __ns; })

#define _NS3(D, T1, S1, T2, S2, T3, S3) \

    D, ({ union drbd_state __ns; __ns = drbd_read_state(D); __ns.T1 = (S1); \

    __ns.T2 = (S2); __ns.T3 = (S3); __ns; })

​

enum chg_state_flags {

    CS_HARD          = 1 << 0,

    CS_VERBOSE       = 1 << 1,

    CS_WAIT_COMPLETE = 1 << 2,