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MINOR: peers: Reorder and slightly rename PEER flags

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There are too many holes in peer flags. So let's reorder them. In addition,
PEER_F_RESYNC_REQUESTED flag was renamed to PEER_F_DBG_RESYNC_REQUESTED to
clearly state it is a flag set for debugging purpose.

Finally, PEER_TEACH_RESET was replaced by PEER_TEACH_FLAGS and the bitwise
complement operator is now used on lines updating the peer flags. It is a
far more common way to do (in HAProxy code at least) and less surprising.
This commit is contained in:
Christopher Faulet 2024-04-25 08:43:21 +02:00
parent 9934eebc19
commit 17c4030aaa
1 changed files with 16 additions and 25 deletions
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41
src/peers.c
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@ -50,10 +50,6 @@
#include <haproxy/trace.h>
/*******************************/
/* Current peer learning state */
/*******************************/
/******************************/
/* Current peers section resync state */
/******************************/
@ -87,25 +83,20 @@
#define SHTABLE_F_TEACH_STAGE2 0x00000002 /* Teach state 2 complete */
/******************************/
/* Remote peer teaching state */
/* Peer flags */
/******************************/
#define PEER_F_TEACH_PROCESS 0x00000001 /* Teach a lesson to current peer */
/* unused : 0x00000002..0x00000004 */
#define PEER_F_TEACH_FINISHED 0x00000008 /* Teach conclude, (wait for confirm) */
#define PEER_F_LOCAL_TEACH_COMPLETE 0x00000010 /* All that we know already taught to current peer, used only for a local peer */
/* unused : 0x00000020..0x00000100 */
#define PEER_F_LEARN_NOTUP2DATE 0x00000200 /* Learn from peer finished but peer is not up to date */
/* unused : 0x00000400..0x00008000 */
#define PEER_F_RESYNC_REQUESTED 0x00010000 /* A resnyc was explicitly requested */
#define PEER_F_TEACH_FINISHED 0x00000002 /* Teach conclude, (wait for confirm) */
#define PEER_F_LOCAL_TEACH_COMPLETE 0x00000004 /* The old local peer taught all that it known to new one */
#define PEER_F_LEARN_NOTUP2DATE 0x00000008 /* Learn from peer finished but peer is not up to date */
#define PEER_F_WAIT_SYNCTASK_ACK 0x00000010 /* Stop all processing waiting for the sync task acknowledgement when the applet state changes */
#define PEER_F_ALIVE 0x00000020 /* Used to flag a peer a alive. */
#define PEER_F_HEARTBEAT 0x00000040 /* Heartbeat message to send. */
#define PEER_F_DWNGRD 0x00000080 /* When this flag is enabled, we must downgrade the supported version announced during peer sessions. */
/* unused 0x00000100..0x00080000 */
#define PEER_F_DBG_RESYNC_REQUESTED 0x00100000 /* A resnyc was explicitly requested at least once (for debugging purpose) */
#define PEER_F_WAIT_SYNCTASK_ACK 0x00020000 /* Stop all processing waiting for the sync task acknowledgement when the applet state changes */
/* unused : 0x00020000..0x10000000 */
#define PEER_F_ALIVE 0x20000000 /* Used to flag a peer a alive. */
#define PEER_F_HEARTBEAT 0x40000000 /* Heartbeat message to send. */
#define PEER_F_DWNGRD 0x80000000 /* When this flag is enabled, we must downgrade the supported version announced during peer sessions. */
#define PEER_TEACH_RESET ~(PEER_F_TEACH_PROCESS|PEER_F_TEACH_FINISHED)
#define PEER_TEACH_FLAGS (PEER_F_TEACH_PROCESS|PEER_F_TEACH_FINISHED)
#define PEER_RESYNC_TIMEOUT 5000 /* 5 seconds */
@ -1101,7 +1092,7 @@ void __peer_session_deinit(struct peer *peer)
peer->appctx = NULL;
/* reset teaching flags to 0 */
peer->flags &= PEER_TEACH_RESET;
peer->flags &= ~PEER_TEACH_FLAGS;
/* Mark the peer as stopping and wait for the sync task */
peer->flags |= PEER_F_WAIT_SYNCTASK_ACK;
@ -2524,10 +2515,10 @@ static inline int peer_treat_awaited_msg(struct appctx *appctx, struct peer *pee
}
/* reset teaching flags to 0 */
peer->flags &= PEER_TEACH_RESET;
peer->flags &= ~PEER_TEACH_FLAGS;
/* flag to start to teach lesson */
peer->flags |= (PEER_F_TEACH_PROCESS|PEER_F_RESYNC_REQUESTED);
peer->flags |= (PEER_F_TEACH_PROCESS|PEER_F_DBG_RESYNC_REQUESTED);
}
else if (msg_head[1] == PEER_MSG_CTRL_RESYNCFINISHED) {
TRACE_PROTO("received control message", PEERS_EV_CTRLMSG,
@ -2567,7 +2558,7 @@ static inline int peer_treat_awaited_msg(struct appctx *appctx, struct peer *pee
}
/* reset teaching flags to 0 */
peer->flags &= PEER_TEACH_RESET;
peer->flags &= ~PEER_TEACH_FLAGS;
}
else if (msg_head[1] == PEER_MSG_CTRL_HEARTBEAT) {
TRACE_PROTO("received control message", PEERS_EV_CTRLMSG,
@ -2907,7 +2898,7 @@ static inline void init_connected_peer(struct peer *peer, struct peers *peers)
peer->confirm = 0;
/* reset teaching flags to 0 */
peer->flags &= PEER_TEACH_RESET;
peer->flags &= ~PEER_TEACH_FLAGS;
if (peer->local && !(appctx_is_back(peer->appctx))) {
/* If the local peer has established the connection (appctx is