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| author | Simon Rettberg | 2017-11-02 13:41:35 +0100 |
|---|---|---|
| committer | Simon Rettberg | 2017-11-02 13:41:35 +0100 |
| commit | 1587f73c38c9228a1a93889aae6351eff891cbe8 (patch) | |
| tree | 4a43804793d1c5c3a1d0566c827e7cde8bac3c6b /src/shared | |
| parent | [FUSE] Fix printf warning for logadd call (diff) | |
| download | dnbd3-1587f73c38c9228a1a93889aae6351eff891cbe8.tar.gz dnbd3-1587f73c38c9228a1a93889aae6351eff891cbe8.tar.xz dnbd3-1587f73c38c9228a1a93889aae6351eff891cbe8.zip | |
[SERVER] Support finer control over replication when a proxy connects to a proxy
Introduce new flag in "select image" message to tell the uplink server
whether we have background replication enabled or not. Also reject
a connecting proxy if the connecting proxy uses BGR but we don't, as this
would basically force the image to be replicated locally too.
Diffstat (limited to 'src/shared')
| -rw-r--r-- | src/shared/protocol.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/src/shared/protocol.h b/src/shared/protocol.h index 561e5a1..1665e70 100644 --- a/src/shared/protocol.h +++ b/src/shared/protocol.h @@ -11,11 +11,17 @@ #include <sys/socket.h> #include <sys/uio.h> +// Client tells server that it is another server #define FLAGS8_SERVER (1) +// Client (which is a proxy) tells server that it has background-replication enabled +#define FLAGS8_BG_REP (2) // 2017-10-16: We now support hop-counting, macro to pass hop count conditinally to a function #define COND_HOPCOUNT(vers,hopcount) ( (vers) >= 3 ? (hopcount) : 0 ) +// 2017-11-02: Macro to set flags in select image message properly if we're a server, as BG_REP depends on global var +#define SI_SERVER_FLAGS ( FLAGS8_SERVER | (_backgroundReplication ? FLAGS8_BG_REP : 0) ) + #define REPLY_OK (0) #define REPLY_ERRNO (-1) #define REPLY_AGAIN (-2) |