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| author | Karsten Graul <kgraul@linux.ibm.com> | 2020-05-01 12:48:05 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2020-05-01 16:20:04 -0700 |
| commit | d550066776aae3bb31e0240cab24f62e33c47fd3 (patch) | |
| tree | 00ec1288640766d1124baa26c72ec2f0a16638aa /net/smc/smc_core.h | |
| parent | fbed3b37c89633eb602f4ec8e30186e601b793e5 (diff) | |
| download | linux-d550066776aae3bb31e0240cab24f62e33c47fd3.tar.bz2 | |
net/smc: mutex to protect the lgr against parallel reconfigurations
Introduce llc_conf_mutex in the link group which is used to protect the
buffers and lgr states against parallel link reconfiguration.
This ensures that new connections do not start to register buffers with
the links of a link group when link creation or termination is running.
Signed-off-by: Karsten Graul <kgraul@linux.ibm.com>
Reviewed-by: Ursula Braun <ubraun@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/smc/smc_core.h')
| -rw-r--r-- | net/smc/smc_core.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/net/smc/smc_core.h b/net/smc/smc_core.h index 61ddb5264936..aa198dd0f0e4 100644 --- a/net/smc/smc_core.h +++ b/net/smc/smc_core.h @@ -248,6 +248,8 @@ struct smc_link_group { /* queue for llc events */ spinlock_t llc_event_q_lock; /* protects llc_event_q */ + struct mutex llc_conf_mutex; + /* protects lgr reconfig. */ struct work_struct llc_event_work; /* llc event worker */ wait_queue_head_t llc_waiter; |