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| author | Karsten Graul <kgraul@linux.ibm.com> | 2018-07-25 16:35:33 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-07-26 07:25:53 +0200 |
| commit | 0d18a0cb4b1585d9e5a3b300d5df9ed866561ffb (patch) | |
| tree | 1c854a0d55d1e3636aa7f75674712c233eabb36c /net/smc/smc_llc.c | |
| parent | net/smc: provide fallback reason code (diff) | |
| download | linux-0d18a0cb4b1585d9e5a3b300d5df9ed866561ffb.tar.xz linux-0d18a0cb4b1585d9e5a3b300d5df9ed866561ffb.zip | |
net/smc: improve delete link processing
Send an orderly DELETE LINK request before termination of a link group,
add support for client triggered DELETE LINK processing. And send a
disorderly DELETE LINK before module is unloaded.
Signed-off-by: Karsten Graul <kgraul@linux.ibm.com>
Signed-off-by: Ursula Braun <ubraun@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/smc/smc_llc.c')
| -rw-r--r-- | net/smc/smc_llc.c | 30 |
1 files changed, 19 insertions, 11 deletions
diff --git a/net/smc/smc_llc.c b/net/smc/smc_llc.c index a88c01029fa6..9c916c709ca7 100644 --- a/net/smc/smc_llc.c +++ b/net/smc/smc_llc.c @@ -278,7 +278,7 @@ int smc_llc_send_add_link(struct smc_link *link, u8 mac[], u8 gid[], /* prepare a delete link message */ static void smc_llc_prep_delete_link(struct smc_llc_msg_del_link *delllc, struct smc_link *link, - enum smc_llc_reqresp reqresp) + enum smc_llc_reqresp reqresp, bool orderly) { memset(delllc, 0, sizeof(*delllc)); delllc->hd.common.type = SMC_LLC_DELETE_LINK; @@ -287,13 +287,14 @@ static void smc_llc_prep_delete_link(struct smc_llc_msg_del_link *delllc, delllc->hd.flags |= SMC_LLC_FLAG_RESP; /* DEL_LINK_ALL because only 1 link supported */ delllc->hd.flags |= SMC_LLC_FLAG_DEL_LINK_ALL; - delllc->hd.flags |= SMC_LLC_FLAG_DEL_LINK_ORDERLY; + if (orderly) + delllc->hd.flags |= SMC_LLC_FLAG_DEL_LINK_ORDERLY; delllc->link_num = link->link_id; } /* send DELETE LINK request or response */ int smc_llc_send_delete_link(struct smc_link *link, - enum smc_llc_reqresp reqresp) + enum smc_llc_reqresp reqresp, bool orderly) { struct smc_llc_msg_del_link *delllc; struct smc_wr_tx_pend_priv *pend; @@ -304,7 +305,7 @@ int smc_llc_send_delete_link(struct smc_link *link, if (rc) return rc; delllc = (struct smc_llc_msg_del_link *)wr_buf; - smc_llc_prep_delete_link(delllc, link, reqresp); + smc_llc_prep_delete_link(delllc, link, reqresp, orderly); /* send llc message */ rc = smc_wr_tx_send(link, pend); return rc; @@ -438,17 +439,19 @@ static void smc_llc_rx_delete_link(struct smc_link *link, if (llc->hd.flags & SMC_LLC_FLAG_RESP) { if (lgr->role == SMC_SERV) - smc_lgr_terminate(lgr); + smc_lgr_schedule_free_work_fast(lgr); } else { + smc_lgr_forget(lgr); + smc_llc_link_deleting(link); if (lgr->role == SMC_SERV) { - smc_lgr_forget(lgr); - smc_llc_prep_delete_link(llc, link, SMC_LLC_REQ); - smc_llc_send_message(link, llc, sizeof(*llc)); + /* client asks to delete this link, send request */ + smc_llc_prep_delete_link(llc, link, SMC_LLC_REQ, true); } else { - smc_llc_prep_delete_link(llc, link, SMC_LLC_RESP); - smc_llc_send_message(link, llc, sizeof(*llc)); - smc_lgr_terminate(lgr); + /* server requests to delete this link, send response */ + smc_llc_prep_delete_link(llc, link, SMC_LLC_RESP, true); } + smc_llc_send_message(link, llc, sizeof(*llc)); + smc_lgr_schedule_free_work_fast(lgr); } } @@ -622,6 +625,11 @@ void smc_llc_link_active(struct smc_link *link, int testlink_time) } } +void smc_llc_link_deleting(struct smc_link *link) +{ + link->state = SMC_LNK_DELETING; +} + /* called in tasklet context */ void smc_llc_link_inactive(struct smc_link *link) { |