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feat: add iscsi_reset_next_reconnect interface

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When an iSCSI connection enters the reconnection phase, the backoff
time (next_reconnect) increases with reconnection retry_cnt. However,
if the client detects that the target has recovered before reaching
next_reconnect, calling iscsi_reconnect/iscsi_force_reconnect has no
any effect, making fast reconnection impossible.

This patch introduces an interface to reset next_reconnect, so that
the client can reset the backoff time upon detecting target recovery
and achieve faster reconnection.

Resolves: https://github.com/sahlberg/libiscsi/issues/428

Signed-off-by: raywang <honglei.wang@smartx.com>
This commit is contained in:
hongleiwang
2024-10-30 17:12:07 +08:00
parent f5b7a6d0ce
commit 29e626c0f4
4 changed files with 13 additions and 0 deletions
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5
include/iscsi.h
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@@ -542,6 +542,11 @@ EXTERN int iscsi_force_reconnect(struct iscsi_context *iscsi);
*/
EXTERN int iscsi_force_reconnect_sync(struct iscsi_context *iscsi);
/*
* Reset iscsi auto reconnect next_reconnect time to the current time.
*/
EXTERN void iscsi_reset_next_reconnect(struct iscsi_context *iscsi);
/*
* Asynchronous call to perform an ISCSI login.
*

6
lib/connect.c
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@@ -494,3 +494,9 @@ int iscsi_force_reconnect(struct iscsi_context *iscsi)
{
return reconnect(iscsi, 1);
}
void iscsi_reset_next_reconnect(struct iscsi_context *iscsi)
{
ISCSI_LOG(iscsi, 1, "reset iscsi next_reconnect");
iscsi->next_reconnect = time(NULL);
}

1
lib/libiscsi.def
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@@ -90,6 +90,7 @@ iscsi_extended_copy_task
iscsi_receive_copy_results_sync
iscsi_receive_copy_results_task
iscsi_reconnect
iscsi_reset_next_reconnect
iscsi_sanitize_sync
iscsi_sanitize_task
iscsi_sanitize_block_erase_sync

1
lib/libiscsi.syms.in
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@@ -98,6 +98,7 @@ iscsi_reportluns_sync
iscsi_reportluns_task
iscsi_reserve6_sync
iscsi_reserve6_task
iscsi_reset_next_reconnect
iscsi_sanitize_block_erase_sync
iscsi_sanitize_block_erase_task
iscsi_sanitize_crypto_erase_sync