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add iscsi_force_reconnect()

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If a connection attempt is hung, then iscsi_reconnect() won't do anything. This
makes sense if we'd just re-try to connect to the same target, but if (for
example) login redirect might point us to a different, healthy, target, it
should be possible to restart the full connection process on request.

Signed-off-by: John Levon <john.levon@nutanix.com>
This commit is contained in:
John Levon
2022-01-17 11:21:56 +00:00
committed by Bart Van Assche
parent 314aa26576
commit 30dd7c6429
5 changed files with 60 additions and 3 deletions
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27
include/iscsi.h
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@@ -492,6 +492,33 @@ EXTERN int iscsi_reconnect(struct iscsi_context *iscsi);
*/
EXTERN int iscsi_reconnect_sync(struct iscsi_context *iscsi);
/*
* Disconnect a connection to a target and try to reconnect (async version).
* This call returns immediately and the reconnect is processed in the
* background. Commands send to this connection will be queued and not
* processed until we have successfully reconnected.
*
* This will re-start connection (to the configured original portal) even if a
* pending reconnection is already underway, which may be useful if the current
* connection is not progressing. It does not over-ride any existing re-try
* backoff or max retries state.
*
* Returns:
* 0 reconnect was successful
* <0 error
*/
EXTERN int iscsi_force_reconnect(struct iscsi_context *iscsi);
/*
* Disconnect a connection to a target and try to force reconnection (sync
* version). This call will block until the connection is reestablished.
*
* Returns:
* 0 reconnect was successful
* <0 error
*/
EXTERN int iscsi_force_reconnect_sync(struct iscsi_context *iscsi);
/*
* Asynchronous call to perform an ISCSI login.
*