bbeb641c3e
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
112 lines
3.7 KiB
C
112 lines
3.7 KiB
C
#ifndef DRBD_STATE_H
|
|
#define DRBD_STATE_H
|
|
|
|
struct drbd_conf;
|
|
struct drbd_tconn;
|
|
|
|
/**
|
|
* 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.i = D->state.i; __ns.T = (S); __ns; })
|
|
#define _NS2(D, T1, S1, T2, S2) \
|
|
D, ({ union drbd_state __ns; __ns.i = D->state.i; __ns.T1 = (S1); \
|
|
__ns.T2 = (S2); __ns; })
|
|
#define _NS3(D, T1, S1, T2, S2, T3, S3) \
|
|
D, ({ union drbd_state __ns; __ns.i = D->state.i; __ns.T1 = (S1); \
|
|
__ns.T2 = (S2); __ns.T3 = (S3); __ns; })
|
|
|
|
enum chg_state_flags {
|
|
CS_HARD = 1,
|
|
CS_VERBOSE = 2,
|
|
CS_WAIT_COMPLETE = 4,
|
|
CS_SERIALIZE = 8,
|
|
CS_ORDERED = CS_WAIT_COMPLETE + CS_SERIALIZE,
|
|
CS_NO_CSTATE_CHG = 16, /* Do not display changes in cstate. Internal to drbd_state.c */
|
|
};
|
|
|
|
extern enum drbd_state_rv drbd_change_state(struct drbd_conf *mdev,
|
|
enum chg_state_flags f,
|
|
union drbd_state mask,
|
|
union drbd_state val);
|
|
extern void drbd_force_state(struct drbd_conf *, union drbd_state,
|
|
union drbd_state);
|
|
extern enum drbd_state_rv _drbd_request_state(struct drbd_conf *,
|
|
union drbd_state,
|
|
union drbd_state,
|
|
enum chg_state_flags);
|
|
extern enum drbd_state_rv __drbd_set_state(struct drbd_conf *, union drbd_state,
|
|
enum chg_state_flags,
|
|
struct completion *done);
|
|
extern void print_st_err(struct drbd_conf *, union drbd_state,
|
|
union drbd_state, int);
|
|
|
|
enum drbd_state_rv
|
|
_conn_request_state(struct drbd_tconn *tconn, union drbd_state mask, union drbd_state val,
|
|
enum chg_state_flags flags);
|
|
|
|
enum drbd_state_rv
|
|
conn_request_state(struct drbd_tconn *tconn, union drbd_state mask, union drbd_state val,
|
|
enum chg_state_flags flags);
|
|
|
|
extern void drbd_resume_al(struct drbd_conf *mdev);
|
|
|
|
/**
|
|
* drbd_request_state() - Reqest a state change
|
|
* @mdev: DRBD device.
|
|
* @mask: mask of state bits to change.
|
|
* @val: value of new state bits.
|
|
*
|
|
* This is the most graceful way of requesting a state change. It is verbose
|
|
* quite verbose in case the state change is not possible, and all those
|
|
* state changes are globally serialized.
|
|
*/
|
|
static inline int drbd_request_state(struct drbd_conf *mdev,
|
|
union drbd_state mask,
|
|
union drbd_state val)
|
|
{
|
|
return _drbd_request_state(mdev, mask, val, CS_VERBOSE + CS_ORDERED);
|
|
}
|
|
|
|
#endif
|