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net/smc: Add link counters for IB device ports

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Add link counters to the structure of the smc ib device, one counter per
ib port. Increase/decrease the counters as needed in the corresponding
routines.

Signed-off-by: Guvenc Gulce <guvenc@linux.ibm.com>
Signed-off-by: Karsten Graul <kgraul@linux.ibm.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Guvenc Gulce 2020-12-01 20:20:39 +01:00 committed by Jakub Kicinski
parent 07d51580ff
commit ddc992866f
2 changed files with 15 additions and 0 deletions
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13
net/smc/smc_core.c
View file

@ -63,6 +63,16 @@ static inline struct list_head *smc_lgr_list_head(struct smc_link_group *lgr,
return &smc_lgr_list.list;
}
static void smc_ibdev_cnt_inc(struct smc_link *lnk)
{
atomic_inc(&lnk->smcibdev->lnk_cnt_by_port[lnk->ibport - 1]);
}
static void smc_ibdev_cnt_dec(struct smc_link *lnk)
{
atomic_dec(&lnk->smcibdev->lnk_cnt_by_port[lnk->ibport - 1]);
}
static void smc_lgr_schedule_free_work(struct smc_link_group *lgr)
{
/* client link group creation always follows the server link group
@ -316,6 +326,7 @@ int smcr_link_init(struct smc_link_group *lgr, struct smc_link *lnk,
lnk->link_idx = link_idx;
lnk->smcibdev = ini->ib_dev;
lnk->ibport = ini->ib_port;
smc_ibdev_cnt_inc(lnk);
lnk->path_mtu = ini->ib_dev->pattr[ini->ib_port - 1].active_mtu;
atomic_set(&lnk->conn_cnt, 0);
smc_llc_link_set_uid(lnk);
@ -359,6 +370,7 @@ int smcr_link_init(struct smc_link_group *lgr, struct smc_link *lnk,
clear_llc_lnk:
smc_llc_link_clear(lnk, false);
out:
smc_ibdev_cnt_dec(lnk);
put_device(&ini->ib_dev->ibdev->dev);
memset(lnk, 0, sizeof(struct smc_link));
lnk->state = SMC_LNK_UNUSED;
@ -749,6 +761,7 @@ void smcr_link_clear(struct smc_link *lnk, bool log)
smc_ib_destroy_queue_pair(lnk);
smc_ib_dealloc_protection_domain(lnk);
smc_wr_free_link_mem(lnk);
smc_ibdev_cnt_dec(lnk);
put_device(&lnk->smcibdev->ibdev->dev);
smcibdev = lnk->smcibdev;
memset(lnk, 0, sizeof(struct smc_link));

2
net/smc/smc_ib.h
View file

@ -53,6 +53,8 @@ struct smc_ib_device { /* ib-device infos for smc */
atomic_t lnk_cnt; /* number of links on ibdev */
wait_queue_head_t lnks_deleted; /* wait 4 removal of all links*/
struct mutex mutex; /* protect dev setup+cleanup */
atomic_t lnk_cnt_by_port[SMC_MAX_PORTS];
/* number of links per port */
};
struct smc_buf_desc;