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net/smc: Correct smc link connection counter in case of smc client

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[ Upstream commit 64513d269e ]

SMC clients may be assigned to a different link after the initial
connection between two peers was established. In such a case,
the connection counter was not correctly set.

Update the connection counter correctly when a smc client connection
is assigned to a different smc link.

Fixes: 07d51580ff ("net/smc: Add connection counters for links")
Signed-off-by: Guvenc Gulce <guvenc@linux.ibm.com>
Tested-by: Karsten Graul <kgraul@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Guvenc Gulce 2021-08-09 11:05:57 +02:00 committed by Greg Kroah-Hartman
parent 9b8f136b88
commit e04669e14c
3 changed files with 5 additions and 3 deletions
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2
net/smc/af_smc.c
View File

@ -757,7 +757,7 @@ static int smc_connect_rdma(struct smc_sock *smc,
reason_code = SMC_CLC_DECL_NOSRVLINK;
goto connect_abort;
}
smc->conn.lnk = link;
smc_switch_link_and_count(&smc->conn, link);
}
/* create send buffer and rmb */

2
net/smc/smc_core.c
View File

@ -916,7 +916,7 @@ static int smc_switch_cursor(struct smc_sock *smc, struct smc_cdc_tx_pend *pend,
return rc;
}
static void smc_switch_link_and_count(struct smc_connection *conn,
void smc_switch_link_and_count(struct smc_connection *conn,
struct smc_link *to_lnk)
{
atomic_dec(&conn->lnk->conn_cnt);

2
net/smc/smc_core.h
View File

@ -446,6 +446,8 @@ void smc_core_exit(void);
int smcr_link_init(struct smc_link_group *lgr, struct smc_link *lnk,
u8 link_idx, struct smc_init_info *ini);
void smcr_link_clear(struct smc_link *lnk, bool log);
void smc_switch_link_and_count(struct smc_connection *conn,
struct smc_link *to_lnk);
int smcr_buf_map_lgr(struct smc_link *lnk);
int smcr_buf_reg_lgr(struct smc_link *lnk);
void smcr_lgr_set_type(struct smc_link_group *lgr, enum smc_lgr_type new_type);