From c9933d0856d6d0ede6b4b30e5e7330614f5203af Mon Sep 17 00:00:00 2001 From: Mitchell Blank Jr Date: Tue, 29 Nov 2005 16:13:32 -0800 Subject: [ATM]: always return the first interface for ATM_ITF_ANY From: Mitchell Blank Jr Signed-off-by: Chas Williams Signed-off-by: David S. Miller --- net/atm/common.c | 30 ++++++++++-------------------- 1 file changed, 10 insertions(+), 20 deletions(-) (limited to 'net/atm/common.c') diff --git a/net/atm/common.c b/net/atm/common.c index 63feea49fb13..83454e12317d 100644 --- a/net/atm/common.c +++ b/net/atm/common.c @@ -423,33 +423,23 @@ int vcc_connect(struct socket *sock, int itf, short vpi, int vci) if (vcc->qos.txtp.traffic_class == ATM_ANYCLASS || vcc->qos.rxtp.traffic_class == ATM_ANYCLASS) return -EINVAL; - if (itf != ATM_ITF_ANY) { + if (likely(itf != ATM_ITF_ANY)) { dev = atm_dev_lookup(itf); - if (!dev) - return -ENODEV; - error = __vcc_connect(vcc, dev, vpi, vci); - if (error) { - atm_dev_put(dev); - return error; - } } else { - struct list_head *p, *next; - dev = NULL; spin_lock(&atm_dev_lock); - list_for_each_safe(p, next, &atm_devs) { - dev = list_entry(p, struct atm_dev, dev_list); + if (!list_empty(&atm_devs)) { + dev = list_entry(atm_devs.next, struct atm_dev, dev_list); atm_dev_hold(dev); - spin_unlock(&atm_dev_lock); - if (!__vcc_connect(vcc, dev, vpi, vci)) - break; - atm_dev_put(dev); - dev = NULL; - spin_lock(&atm_dev_lock); } spin_unlock(&atm_dev_lock); - if (!dev) - return -ENODEV; + } + if (!dev) + return -ENODEV; + error = __vcc_connect(vcc, dev, vpi, vci); + if (error) { + atm_dev_put(dev); + return error; } if (vpi == ATM_VPI_UNSPEC || vci == ATM_VCI_UNSPEC) set_bit(ATM_VF_PARTIAL,&vcc->flags); -- cgit v1.2.2 From 50accc9c428273501dd2a6295c84a533dd1fe645 Mon Sep 17 00:00:00 2001 From: Mitchell Blank Jr Date: Tue, 29 Nov 2005 16:15:18 -0800 Subject: [ATM]: attempt to autoload atm drivers From: Mitchell Blank Jr Signed-off-by: Chas Williams Signed-off-by: David S. Miller --- net/atm/common.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'net/atm/common.c') diff --git a/net/atm/common.c b/net/atm/common.c index 83454e12317d..db9318fc6031 100644 --- a/net/atm/common.c +++ b/net/atm/common.c @@ -424,7 +424,7 @@ int vcc_connect(struct socket *sock, int itf, short vpi, int vci) vcc->qos.rxtp.traffic_class == ATM_ANYCLASS) return -EINVAL; if (likely(itf != ATM_ITF_ANY)) { - dev = atm_dev_lookup(itf); + dev = try_then_request_module(atm_dev_lookup(itf), "atm-device-%d", itf); } else { dev = NULL; spin_lock(&atm_dev_lock); -- cgit v1.2.2 From aaaaaadbe7a663d110814db50fcbe7d320eb4c32 Mon Sep 17 00:00:00 2001 From: Stanislaw Gruszka Date: Tue, 29 Nov 2005 16:16:21 -0800 Subject: [ATM]: avoid race conditions related to atm_devs list Use semaphore to protect atm_devs list, as no one need access to it from interrupt context. Avoid race conditions between atm_dev_register(), atm_dev_lookup() and atm_dev_deregister(). Fix double spin_unlock() bug. Signed-off-by: Stanislaw Gruszka Signed-off-by: Chas Williams Signed-off-by: David S. Miller --- net/atm/common.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'net/atm/common.c') diff --git a/net/atm/common.c b/net/atm/common.c index db9318fc6031..9e016f404e14 100644 --- a/net/atm/common.c +++ b/net/atm/common.c @@ -427,12 +427,12 @@ int vcc_connect(struct socket *sock, int itf, short vpi, int vci) dev = try_then_request_module(atm_dev_lookup(itf), "atm-device-%d", itf); } else { dev = NULL; - spin_lock(&atm_dev_lock); + down(&atm_dev_mutex); if (!list_empty(&atm_devs)) { dev = list_entry(atm_devs.next, struct atm_dev, dev_list); atm_dev_hold(dev); } - spin_unlock(&atm_dev_lock); + up(&atm_dev_mutex); } if (!dev) return -ENODEV; -- cgit v1.2.2 From 64bf69ddff7637b7ed7acf9b2a823cc0ee519439 Mon Sep 17 00:00:00 2001 From: Stanislaw Gruszka Date: Tue, 29 Nov 2005 16:16:41 -0800 Subject: [ATM]: deregistration removes device from atm_devs list immediately atm_dev_deregister() removes device from atm_dev list immediately to prevent operations on a phantom device. Decision to free device based only on ->refcnt now. Remove shutdown_atm_dev() use atm_dev_deregister() instead. atm_dev_deregister() also asynchronously releases all vccs related to device. Signed-off-by: Stanislaw Gruszka Signed-off-by: Chas Williams Signed-off-by: David S. Miller --- net/atm/common.c | 30 +++++++++++++++++++++++++++--- 1 file changed, 27 insertions(+), 3 deletions(-) (limited to 'net/atm/common.c') diff --git a/net/atm/common.c b/net/atm/common.c index 9e016f404e14..6656b111cc05 100644 --- a/net/atm/common.c +++ b/net/atm/common.c @@ -221,6 +221,29 @@ void vcc_release_async(struct atm_vcc *vcc, int reply) EXPORT_SYMBOL(vcc_release_async); +void atm_dev_release_vccs(struct atm_dev *dev) +{ + int i; + + write_lock_irq(&vcc_sklist_lock); + for (i = 0; i < VCC_HTABLE_SIZE; i++) { + struct hlist_head *head = &vcc_hash[i]; + struct hlist_node *node, *tmp; + struct sock *s; + struct atm_vcc *vcc; + + sk_for_each_safe(s, node, tmp, head) { + vcc = atm_sk(s); + if (vcc->dev == dev) { + vcc_release_async(vcc, -EPIPE); + sk_del_node_init(s); + } + } + } + write_unlock_irq(&vcc_sklist_lock); +} + + static int adjust_tp(struct atm_trafprm *tp,unsigned char aal) { int max_sdu; @@ -332,12 +355,13 @@ static int __vcc_connect(struct atm_vcc *vcc, struct atm_dev *dev, short vpi, return -EINVAL; if (vci > 0 && vci < ATM_NOT_RSV_VCI && !capable(CAP_NET_BIND_SERVICE)) return -EPERM; - error = 0; + error = -ENODEV; if (!try_module_get(dev->ops->owner)) - return -ENODEV; + return error; vcc->dev = dev; write_lock_irq(&vcc_sklist_lock); - if ((error = find_ci(vcc, &vpi, &vci))) { + if (test_bit(ATM_DF_REMOVED, &dev->flags) || + (error = find_ci(vcc, &vpi, &vci))) { write_unlock_irq(&vcc_sklist_lock); goto fail_module_put; } -- cgit v1.2.2