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| author | J. Bruce Fields <bfields@citi.umich.edu> | 2010-03-22 15:37:17 -0400 |
|---|---|---|
| committer | J. Bruce Fields <bfields@redhat.com> | 2010-10-01 19:29:44 -0400 |
| commit | edc7a894034acb4c7ff8305716ca5df8aaf8e642 (patch) | |
| tree | 7db61c8c76fc3e58e499989665f2f26987c058a1 /net/sunrpc/svc_xprt.c | |
| parent | c7662518c781edc8059cd9737d18168154bf7510 (diff) | |
| download | lwn-edc7a894034acb4c7ff8305716ca5df8aaf8e642.tar.gz lwn-edc7a894034acb4c7ff8305716ca5df8aaf8e642.zip | |
nfsd: provide callbacks on svc_xprt deletion
NFSv4.1 needs warning when a client tcp connection goes down, if that
connection is being used as a backchannel, so that it can warn the
client that it has lost the backchannel connection.
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
Diffstat (limited to 'net/sunrpc/svc_xprt.c')
| -rw-r--r-- | net/sunrpc/svc_xprt.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/net/sunrpc/svc_xprt.c b/net/sunrpc/svc_xprt.c index 678b6ee4da7b..12025eedc781 100644 --- a/net/sunrpc/svc_xprt.c +++ b/net/sunrpc/svc_xprt.c @@ -156,6 +156,7 @@ void svc_xprt_init(struct svc_xprt_class *xcl, struct svc_xprt *xprt, INIT_LIST_HEAD(&xprt->xpt_list); INIT_LIST_HEAD(&xprt->xpt_ready); INIT_LIST_HEAD(&xprt->xpt_deferred); + INIT_LIST_HEAD(&xprt->xpt_users); mutex_init(&xprt->xpt_mutex); spin_lock_init(&xprt->xpt_lock); set_bit(XPT_BUSY, &xprt->xpt_flags); @@ -881,6 +882,19 @@ static void svc_age_temp_xprts(unsigned long closure) mod_timer(&serv->sv_temptimer, jiffies + svc_conn_age_period * HZ); } +static void call_xpt_users(struct svc_xprt *xprt) +{ + struct svc_xpt_user *u; + + spin_lock(&xprt->xpt_lock); + while (!list_empty(&xprt->xpt_users)) { + u = list_first_entry(&xprt->xpt_users, struct svc_xpt_user, list); + list_del(&u->list); + u->callback(u); + } + spin_unlock(&xprt->xpt_lock); +} + /* * Remove a dead transport */ @@ -913,6 +927,7 @@ void svc_delete_xprt(struct svc_xprt *xprt) while ((dr = svc_deferred_dequeue(xprt)) != NULL) kfree(dr); + call_xpt_users(xprt); svc_xprt_put(xprt); } |