diff options
| author | Karsten Graul <kgraul@linux.ibm.com> | 2020-04-29 18:10:43 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2020-04-29 22:26:32 +0300 |
| commit | d854fcbfaeda9748c85de296fbe07b7763a1939c (patch) | |
| tree | c056b8e27021556cc3b69dae521c3b1ef5ccfc63 /net/smc/smc_core.h | |
| parent | e07d31dc16b0d77ff6b3f71cafe3a825fb80bed4 (diff) | |
| download | linux-d854fcbfaeda9748c85de296fbe07b7763a1939c.tar.xz | |
net/smc: add new link state and related helpers
Before a link can be reused it must have been cleared. Lowest current
link state is INACTIVE, which does not mean that the link is already
cleared.
Add a new state UNUSED that is set when the link is cleared and can be
reused.
Add helper smc_llc_usable_link() to find an active link in a link group,
and smc_link_usable() to determine if a link is usable.
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 | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/net/smc/smc_core.h b/net/smc/smc_core.h index f68ba187ecf8..2b1960c8c8ce 100644 --- a/net/smc/smc_core.h +++ b/net/smc/smc_core.h @@ -32,6 +32,7 @@ enum smc_lgr_role { /* possible roles of a link group */ }; enum smc_link_state { /* possible states of a link */ + SMC_LNK_UNUSED, /* link is unused */ SMC_LNK_INACTIVE, /* link is inactive */ SMC_LNK_ACTIVATING, /* link is being activated */ SMC_LNK_ACTIVE, /* link is active */ @@ -295,6 +296,14 @@ static inline struct smc_connection *smc_lgr_find_conn( return res; } +/* returns true if the specified link is usable */ +static inline bool smc_link_usable(struct smc_link *lnk) +{ + if (lnk->state == SMC_LNK_UNUSED || lnk->state == SMC_LNK_INACTIVE) + return false; + return true; +} + struct smc_sock; struct smc_clc_msg_accept_confirm; struct smc_clc_msg_local; |