diff options
| author | Alex Elder <elder@inktank.com> | 2012-06-20 22:53:53 -0400 |
|---|---|---|
| committer | Sage Weil <sage@inktank.com> | 2012-07-06 00:14:32 -0400 |
| commit | bc18f4b1c850ab355e38373fbb60fd28568d84b5 (patch) | |
| tree | be5f51233f281d329bc7648fbcf216deb4511b01 /net/ceph | |
| parent | 5821bd8ccdf5d17ab2c391c773756538603838c3 (diff) | |
libceph: add some fine ASCII art
Sage liked the state diagram I put in my commit description so
I'm putting it in with the code.
Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Sage Weil <sage@inktank.com>
Diffstat (limited to 'net/ceph')
| -rw-r--r-- | net/ceph/messenger.c | 42 |
1 files changed, 41 insertions, 1 deletions
diff --git a/net/ceph/messenger.c b/net/ceph/messenger.c index 4578e99bbef1..dcc50e4cd5cd 100644 --- a/net/ceph/messenger.c +++ b/net/ceph/messenger.c | |||
| @@ -29,7 +29,47 @@ | |||
| 29 | * the sender. | 29 | * the sender. |
| 30 | */ | 30 | */ |
| 31 | 31 | ||
| 32 | /* State values for ceph_connection->sock_state; NEW is assumed to be 0 */ | 32 | /* |
| 33 | * We track the state of the socket on a given connection using | ||
| 34 | * values defined below. The transition to a new socket state is | ||
| 35 | * handled by a function which verifies we aren't coming from an | ||
| 36 | * unexpected state. | ||
| 37 | * | ||
| 38 | * -------- | ||
| 39 | * | NEW* | transient initial state | ||
| 40 | * -------- | ||
| 41 | * | con_sock_state_init() | ||
| 42 | * v | ||
| 43 | * ---------- | ||
| 44 | * | CLOSED | initialized, but no socket (and no | ||
| 45 | * ---------- TCP connection) | ||
| 46 | * ^ \ | ||
| 47 | * | \ con_sock_state_connecting() | ||
| 48 | * | ---------------------- | ||
| 49 | * | \ | ||
| 50 | * + con_sock_state_closed() \ | ||
| 51 | * |\ \ | ||
| 52 | * | \ \ | ||
| 53 | * | ----------- \ | ||
| 54 | * | | CLOSING | socket event; \ | ||
| 55 | * | ----------- await close \ | ||
| 56 | * | ^ | | ||
| 57 | * | | | | ||
| 58 | * | + con_sock_state_closing() | | ||
| 59 | * | / \ | | ||
| 60 | * | / --------------- | | ||
| 61 | * | / \ v | ||
| 62 | * | / -------------- | ||
| 63 | * | / -----------------| CONNECTING | socket created, TCP | ||
| 64 | * | | / -------------- connect initiated | ||
| 65 | * | | | con_sock_state_connected() | ||
| 66 | * | | v | ||
| 67 | * ------------- | ||
| 68 | * | CONNECTED | TCP connection established | ||
| 69 | * ------------- | ||
| 70 | * | ||
| 71 | * State values for ceph_connection->sock_state; NEW is assumed to be 0. | ||
| 72 | */ | ||
| 33 | 73 | ||
| 34 | #define CON_SOCK_STATE_NEW 0 /* -> CLOSED */ | 74 | #define CON_SOCK_STATE_NEW 0 /* -> CLOSED */ |
| 35 | #define CON_SOCK_STATE_CLOSED 1 /* -> CONNECTING */ | 75 | #define CON_SOCK_STATE_CLOSED 1 /* -> CONNECTING */ |