diff options
| author | Karsten Graul <kgraul@linux.ibm.com> | 2018-05-03 17:57:38 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-05-03 14:47:31 -0400 |
| commit | a6920d1d130c3de039be982eba42542d329dc64c (patch) | |
| tree | eb06c1cdb7a9867644730d86ab9e13e12be17b41 /net/smc | |
| parent | e63a5f8c19d7807823d68830ebe8cfbd4419ab13 (diff) | |
| download | linux-a6920d1d130c3de039be982eba42542d329dc64c.tar.bz2 | |
net/smc: handle unregistered buffers
When smc_wr_reg_send() fails then tag (regerr) the affected buffer and
free it in smc_buf_unuse().
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')
| -rw-r--r-- | net/smc/af_smc.c | 4 | ||||
| -rw-r--r-- | net/smc/smc_core.c | 22 | ||||
| -rw-r--r-- | net/smc/smc_core.h | 3 |
3 files changed, 24 insertions, 5 deletions
diff --git a/net/smc/af_smc.c b/net/smc/af_smc.c index fdb2976117bd..d03b8d29ffc0 100644 --- a/net/smc/af_smc.c +++ b/net/smc/af_smc.c @@ -296,8 +296,10 @@ static void smc_copy_sock_settings_to_smc(struct smc_sock *smc) static int smc_reg_rmb(struct smc_link *link, struct smc_buf_desc *rmb_desc) { /* register memory region for new rmb */ - if (smc_wr_reg_send(link, rmb_desc->mr_rx[SMC_SINGLE_LINK])) + if (smc_wr_reg_send(link, rmb_desc->mr_rx[SMC_SINGLE_LINK])) { + rmb_desc->regerr = 1; return -EFAULT; + } return 0; } diff --git a/net/smc/smc_core.c b/net/smc/smc_core.c index f44f6803f7ff..d4bd01bb44e1 100644 --- a/net/smc/smc_core.c +++ b/net/smc/smc_core.c @@ -32,6 +32,9 @@ static u32 smc_lgr_num; /* unique link group number */ +static void smc_buf_free(struct smc_buf_desc *buf_desc, struct smc_link *lnk, + bool is_rmb); + static void smc_lgr_schedule_free_work(struct smc_link_group *lgr) { /* client link group creation always follows the server link group @@ -234,9 +237,22 @@ static void smc_buf_unuse(struct smc_connection *conn) conn->sndbuf_size = 0; } if (conn->rmb_desc) { - conn->rmb_desc->reused = true; - conn->rmb_desc->used = 0; - conn->rmbe_size = 0; + if (!conn->rmb_desc->regerr) { + conn->rmb_desc->reused = 1; + conn->rmb_desc->used = 0; + conn->rmbe_size = 0; + } else { + /* buf registration failed, reuse not possible */ + struct smc_link_group *lgr = conn->lgr; + struct smc_link *lnk; + + write_lock_bh(&lgr->rmbs_lock); + list_del(&conn->rmb_desc->list); + write_unlock_bh(&lgr->rmbs_lock); + + lnk = &lgr->lnk[SMC_SINGLE_LINK]; + smc_buf_free(conn->rmb_desc, lnk, true); + } } } diff --git a/net/smc/smc_core.h b/net/smc/smc_core.h index 07e2a393e6d9..5dfcb15d529f 100644 --- a/net/smc/smc_core.h +++ b/net/smc/smc_core.h @@ -123,7 +123,8 @@ struct smc_buf_desc { */ u32 order; /* allocation order */ u32 used; /* currently used / unused */ - bool reused; /* new created / reused */ + u8 reused : 1; /* new created / reused */ + u8 regerr : 1; /* err during registration */ }; struct smc_rtoken { /* address/key of remote RMB */ |