From 66547b0251b0b62dcb637631f566410a0e1e47a8 Mon Sep 17 00:00:00 2001 From: Stanislav Kinsbursky Date: Wed, 25 Jul 2012 16:56:43 +0400 Subject: LockD: manage grace period per network namespace Signed-off-by: Stanislav Kinsbursky Signed-off-by: J. Bruce Fields --- fs/lockd/svc.c | 17 +++++++++++------ 1 file changed, 11 insertions(+), 6 deletions(-) (limited to 'fs/lockd/svc.c') diff --git a/fs/lockd/svc.c b/fs/lockd/svc.c index 80938fda67e..70c417758eb 100644 --- a/fs/lockd/svc.c +++ b/fs/lockd/svc.c @@ -95,21 +95,22 @@ static void grace_ender(struct work_struct *not_used) locks_end_grace(&lockd_manager); } -static DECLARE_DELAYED_WORK(grace_period_end, grace_ender); - static void set_grace_period(void) { unsigned long grace_period = get_lockd_grace_period(); + struct lockd_net *ln = net_generic(&init_net, lockd_net_id); locks_start_grace(&lockd_manager); - cancel_delayed_work_sync(&grace_period_end); - schedule_delayed_work(&grace_period_end, grace_period); + cancel_delayed_work_sync(&ln->grace_period_end); + schedule_delayed_work(&ln->grace_period_end, grace_period); } static void restart_grace(void) { if (nlmsvc_ops) { - cancel_delayed_work_sync(&grace_period_end); + struct lockd_net *ln = net_generic(&init_net, lockd_net_id); + + cancel_delayed_work_sync(&ln->grace_period_end); locks_end_grace(&lockd_manager); nlmsvc_invalidate_all(); set_grace_period(); @@ -124,6 +125,7 @@ lockd(void *vrqstp) { int err = 0, preverr = 0; struct svc_rqst *rqstp = vrqstp; + struct lockd_net *ln = net_generic(&init_net, lockd_net_id); /* try_to_freeze() is called from svc_recv() */ set_freezable(); @@ -184,7 +186,7 @@ lockd(void *vrqstp) svc_process(rqstp); } flush_signals(current); - cancel_delayed_work_sync(&grace_period_end); + cancel_delayed_work_sync(&ln->grace_period_end); locks_end_grace(&lockd_manager); if (nlmsvc_ops) nlmsvc_invalidate_all(); @@ -589,6 +591,9 @@ module_param(nlm_max_connections, uint, 0644); static int lockd_init_net(struct net *net) { + struct lockd_net *ln = net_generic(net, lockd_net_id); + + INIT_DELAYED_WORK(&ln->grace_period_end, grace_ender); return 0; } -- cgit v1.2.3 From 08d44a35a9e71a132c8e8abb0451b7b5e5b3dfee Mon Sep 17 00:00:00 2001 From: Stanislav Kinsbursky Date: Wed, 25 Jul 2012 16:56:50 +0400 Subject: LockD: make lockd manager allocated per network namespace Signed-off-by: Stanislav Kinsbursky Signed-off-by: J. Bruce Fields --- fs/lockd/svc.c | 18 ++++++++++-------- 1 file changed, 10 insertions(+), 8 deletions(-) (limited to 'fs/lockd/svc.c') diff --git a/fs/lockd/svc.c b/fs/lockd/svc.c index 70c417758eb..a9c436bc450 100644 --- a/fs/lockd/svc.c +++ b/fs/lockd/svc.c @@ -87,12 +87,14 @@ static unsigned long get_lockd_grace_period(void) return nlm_timeout * 5 * HZ; } -static struct lock_manager lockd_manager = { -}; - -static void grace_ender(struct work_struct *not_used) +static void grace_ender(struct work_struct *grace) { - locks_end_grace(&lockd_manager); + struct delayed_work *dwork = container_of(grace, struct delayed_work, + work); + struct lockd_net *ln = container_of(dwork, struct lockd_net, + grace_period_end); + + locks_end_grace(&ln->lockd_manager); } static void set_grace_period(void) @@ -100,7 +102,7 @@ static void set_grace_period(void) unsigned long grace_period = get_lockd_grace_period(); struct lockd_net *ln = net_generic(&init_net, lockd_net_id); - locks_start_grace(&lockd_manager); + locks_start_grace(&ln->lockd_manager); cancel_delayed_work_sync(&ln->grace_period_end); schedule_delayed_work(&ln->grace_period_end, grace_period); } @@ -111,7 +113,7 @@ static void restart_grace(void) struct lockd_net *ln = net_generic(&init_net, lockd_net_id); cancel_delayed_work_sync(&ln->grace_period_end); - locks_end_grace(&lockd_manager); + locks_end_grace(&ln->lockd_manager); nlmsvc_invalidate_all(); set_grace_period(); } @@ -187,7 +189,7 @@ lockd(void *vrqstp) } flush_signals(current); cancel_delayed_work_sync(&ln->grace_period_end); - locks_end_grace(&lockd_manager); + locks_end_grace(&ln->lockd_manager); if (nlmsvc_ops) nlmsvc_invalidate_all(); nlm_shutdown_hosts(); -- cgit v1.2.3 From db9c4553412d72c6a05e0168d1d487f66e0660b3 Mon Sep 17 00:00:00 2001 From: Stanislav Kinsbursky Date: Wed, 25 Jul 2012 16:57:13 +0400 Subject: LockD: manage grace list per network namespace Signed-off-by: Stanislav Kinsbursky Signed-off-by: J. Bruce Fields --- fs/lockd/svc.c | 1 + 1 file changed, 1 insertion(+) (limited to 'fs/lockd/svc.c') diff --git a/fs/lockd/svc.c b/fs/lockd/svc.c index a9c436bc450..834dfe2ed2e 100644 --- a/fs/lockd/svc.c +++ b/fs/lockd/svc.c @@ -596,6 +596,7 @@ static int lockd_init_net(struct net *net) struct lockd_net *ln = net_generic(net, lockd_net_id); INIT_DELAYED_WORK(&ln->grace_period_end, grace_ender); + INIT_LIST_HEAD(&ln->grace_list); return 0; } -- cgit v1.2.3 From 5ccb0066f2d561549cc4d73d7f56b4ce3ca7a8a1 Mon Sep 17 00:00:00 2001 From: Stanislav Kinsbursky Date: Wed, 25 Jul 2012 16:57:22 +0400 Subject: LockD: pass actual network namespace to grace period management functions Passed network namespace replaced hard-coded init_net Signed-off-by: Stanislav Kinsbursky Signed-off-by: J. Bruce Fields --- fs/lockd/svc.c | 16 +++++++++------- 1 file changed, 9 insertions(+), 7 deletions(-) (limited to 'fs/lockd/svc.c') diff --git a/fs/lockd/svc.c b/fs/lockd/svc.c index 834dfe2ed2e..68271c206bd 100644 --- a/fs/lockd/svc.c +++ b/fs/lockd/svc.c @@ -97,12 +97,12 @@ static void grace_ender(struct work_struct *grace) locks_end_grace(&ln->lockd_manager); } -static void set_grace_period(void) +static void set_grace_period(struct net *net) { unsigned long grace_period = get_lockd_grace_period(); - struct lockd_net *ln = net_generic(&init_net, lockd_net_id); + struct lockd_net *ln = net_generic(net, lockd_net_id); - locks_start_grace(&ln->lockd_manager); + locks_start_grace(net, &ln->lockd_manager); cancel_delayed_work_sync(&ln->grace_period_end); schedule_delayed_work(&ln->grace_period_end, grace_period); } @@ -110,12 +110,13 @@ static void set_grace_period(void) static void restart_grace(void) { if (nlmsvc_ops) { - struct lockd_net *ln = net_generic(&init_net, lockd_net_id); + struct net *net = &init_net; + struct lockd_net *ln = net_generic(net, lockd_net_id); cancel_delayed_work_sync(&ln->grace_period_end); locks_end_grace(&ln->lockd_manager); nlmsvc_invalidate_all(); - set_grace_period(); + set_grace_period(net); } } @@ -127,7 +128,8 @@ lockd(void *vrqstp) { int err = 0, preverr = 0; struct svc_rqst *rqstp = vrqstp; - struct lockd_net *ln = net_generic(&init_net, lockd_net_id); + struct net *net = &init_net; + struct lockd_net *ln = net_generic(net, lockd_net_id); /* try_to_freeze() is called from svc_recv() */ set_freezable(); @@ -141,7 +143,7 @@ lockd(void *vrqstp) nlm_timeout = LOCKD_DFLT_TIMEO; nlmsvc_timeout = nlm_timeout * HZ; - set_grace_period(); + set_grace_period(net); /* * The main request loop. We don't terminate until the last -- cgit v1.2.3 From 5630f7fa97e8dfa2b3c6e7370c1702180336e493 Mon Sep 17 00:00:00 2001 From: Stanislav Kinsbursky Date: Wed, 25 Jul 2012 16:57:29 +0400 Subject: Lockd: move grace period management from lockd() to per-net functions Signed-off-by: Stanislav Kinsbursky Signed-off-by: J. Bruce Fields --- fs/lockd/svc.c | 9 +++------ 1 file changed, 3 insertions(+), 6 deletions(-) (limited to 'fs/lockd/svc.c') diff --git a/fs/lockd/svc.c b/fs/lockd/svc.c index 68271c206bd..31a63f87b80 100644 --- a/fs/lockd/svc.c +++ b/fs/lockd/svc.c @@ -128,8 +128,6 @@ lockd(void *vrqstp) { int err = 0, preverr = 0; struct svc_rqst *rqstp = vrqstp; - struct net *net = &init_net; - struct lockd_net *ln = net_generic(net, lockd_net_id); /* try_to_freeze() is called from svc_recv() */ set_freezable(); @@ -143,8 +141,6 @@ lockd(void *vrqstp) nlm_timeout = LOCKD_DFLT_TIMEO; nlmsvc_timeout = nlm_timeout * HZ; - set_grace_period(net); - /* * The main request loop. We don't terminate until the last * NFS mount or NFS daemon has gone away. @@ -190,8 +186,6 @@ lockd(void *vrqstp) svc_process(rqstp); } flush_signals(current); - cancel_delayed_work_sync(&ln->grace_period_end); - locks_end_grace(&ln->lockd_manager); if (nlmsvc_ops) nlmsvc_invalidate_all(); nlm_shutdown_hosts(); @@ -272,6 +266,7 @@ static int lockd_up_net(struct svc_serv *serv, struct net *net) error = make_socks(serv, net); if (error < 0) goto err_socks; + set_grace_period(net); dprintk("lockd_up_net: per-net data created; net=%p\n", net); return 0; @@ -289,6 +284,8 @@ static void lockd_down_net(struct svc_serv *serv, struct net *net) if (ln->nlmsvc_users) { if (--ln->nlmsvc_users == 0) { nlm_shutdown_hosts_net(net); + cancel_delayed_work_sync(&ln->grace_period_end); + locks_end_grace(&ln->lockd_manager); svc_shutdown_net(serv, net); dprintk("lockd_down_net: per-net data destroyed; net=%p\n", net); } -- cgit v1.2.3 From 5b444cc9a4c979aa0fa185c8ddca221462a34b7a Mon Sep 17 00:00:00 2001 From: "J. Bruce Fields" Date: Fri, 17 Aug 2012 21:47:53 -0400 Subject: svcrpc: remove handling of unknown errors from svc_recv svc_recv() returns only -EINTR or -EAGAIN. If we really want to worry about the case where it has a bug that causes it to return something else, we could stick a WARN() in svc_recv. But it's silly to require every caller to have all this boilerplate to handle that case. Signed-off-by: J. Bruce Fields --- fs/lockd/svc.c | 17 ++--------------- 1 file changed, 2 insertions(+), 15 deletions(-) (limited to 'fs/lockd/svc.c') diff --git a/fs/lockd/svc.c b/fs/lockd/svc.c index 31a63f87b80..e515569f0f8 100644 --- a/fs/lockd/svc.c +++ b/fs/lockd/svc.c @@ -126,7 +126,7 @@ static void restart_grace(void) static int lockd(void *vrqstp) { - int err = 0, preverr = 0; + int err = 0; struct svc_rqst *rqstp = vrqstp; /* try_to_freeze() is called from svc_recv() */ @@ -165,21 +165,8 @@ lockd(void *vrqstp) * recvfrom routine. */ err = svc_recv(rqstp, timeout); - if (err == -EAGAIN || err == -EINTR) { - preverr = err; + if (err == -EAGAIN || err == -EINTR) continue; - } - if (err < 0) { - if (err != preverr) { - printk(KERN_WARNING "%s: unexpected error " - "from svc_recv (%d)\n", __func__, err); - preverr = err; - } - schedule_timeout_interruptible(HZ); - continue; - } - preverr = err; - dprintk("lockd: request from %s\n", svc_print_addr(rqstp, buf, sizeof(buf))); -- cgit v1.2.3 From e9406db20fecbfcab646bad157b4cfdc7cadddfb Mon Sep 17 00:00:00 2001 From: Stanislav Kinsbursky Date: Tue, 18 Sep 2012 13:37:12 +0400 Subject: lockd: per-net NSM client creation and destruction helpers introduced NSM RPC client can be required on NFSv3 umount, when child reaper is dying (and destroying it's mount namespace). It means, that current nsproxy is set to NULL already, but creation of RPC client requires UTS namespace for gaining hostname string. This patch introduces reference counted NFS RPC clients creation and destruction helpers (similar to RPCBIND RPC clients). Signed-off-by: Stanislav Kinsbursky Cc: Signed-off-by: Trond Myklebust --- fs/lockd/svc.c | 1 + 1 file changed, 1 insertion(+) (limited to 'fs/lockd/svc.c') diff --git a/fs/lockd/svc.c b/fs/lockd/svc.c index 31a63f87b80..7e355870d51 100644 --- a/fs/lockd/svc.c +++ b/fs/lockd/svc.c @@ -596,6 +596,7 @@ static int lockd_init_net(struct net *net) INIT_DELAYED_WORK(&ln->grace_period_end, grace_ender); INIT_LIST_HEAD(&ln->grace_list); + spin_lock_init(&ln->nsm_clnt_lock); return 0; } -- cgit v1.2.3