| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-Id: <11926678783362-git-send-email-fubar@us.ibm.com>
Date: Wed, 17 Oct 2007 17:37:50 -0700
From: Jay Vosburgh <fubar@...ibm.com>
To: netdev@...r.kernel.org, jgarzik@...ox.com
Cc: andy@...yhouse.net, Jay Vosburgh <fubar@...ibm.com>
Subject: [PATCH 5/6] Convert more locks to _bh, acquire rtnl, for new locking
Convert more lock acquisitions to _bh flavor to avoid deadlock
with workqueue activity and add acquisition of RTNL in appropriate places.
Affects ALB mode, as well as core bonding functions and sysfs.
Signed-off-by: Andy Gospodarek <andy@...yhouse.net>
Signed-off-by: Jay Vosburgh <fubar@...ibm.com>
---
drivers/net/bonding/bond_alb.c | 16 ++++++++--------
drivers/net/bonding/bond_main.c | 20 ++++++++++----------
drivers/net/bonding/bond_sysfs.c | 16 +++++++++++-----
3 files changed, 29 insertions(+), 23 deletions(-)
diff --git a/drivers/net/bonding/bond_alb.c b/drivers/net/bonding/bond_alb.c
index f2e2872..6db5d76 100644
--- a/drivers/net/bonding/bond_alb.c
+++ b/drivers/net/bonding/bond_alb.c
@@ -128,12 +128,12 @@ static inline u8 _simple_hash(const u8 *hash_start, int hash_size)
static inline void _lock_tx_hashtbl(struct bonding *bond)
{
- spin_lock(&(BOND_ALB_INFO(bond).tx_hashtbl_lock));
+ spin_lock_bh(&(BOND_ALB_INFO(bond).tx_hashtbl_lock));
}
static inline void _unlock_tx_hashtbl(struct bonding *bond)
{
- spin_unlock(&(BOND_ALB_INFO(bond).tx_hashtbl_lock));
+ spin_unlock_bh(&(BOND_ALB_INFO(bond).tx_hashtbl_lock));
}
/* Caller must hold tx_hashtbl lock */
@@ -305,12 +305,12 @@ static struct slave *tlb_choose_channel(struct bonding *bond, u32 hash_index, u3
/*********************** rlb specific functions ***************************/
static inline void _lock_rx_hashtbl(struct bonding *bond)
{
- spin_lock(&(BOND_ALB_INFO(bond).rx_hashtbl_lock));
+ spin_lock_bh(&(BOND_ALB_INFO(bond).rx_hashtbl_lock));
}
static inline void _unlock_rx_hashtbl(struct bonding *bond)
{
- spin_unlock(&(BOND_ALB_INFO(bond).rx_hashtbl_lock));
+ spin_unlock_bh(&(BOND_ALB_INFO(bond).rx_hashtbl_lock));
}
/* when an ARP REPLY is received from a client update its info
@@ -472,13 +472,13 @@ static void rlb_clear_slave(struct bonding *bond, struct slave *slave)
_unlock_rx_hashtbl(bond);
- write_lock(&bond->curr_slave_lock);
+ write_lock_bh(&bond->curr_slave_lock);
if (slave != bond->curr_active_slave) {
rlb_teach_disabled_mac_on_primary(bond, slave->dev->dev_addr);
}
- write_unlock(&bond->curr_slave_lock);
+ write_unlock_bh(&bond->curr_slave_lock);
}
static void rlb_update_client(struct rlb_client_info *client_info)
@@ -1519,11 +1519,11 @@ int bond_alb_init_slave(struct bonding *bond, struct slave *slave)
/* caller must hold the bond lock for write since the mac addresses
* are compared and may be swapped.
*/
- write_lock_bh(&bond->lock);
+ read_lock(&bond->lock);
res = alb_handle_addr_collision_on_attach(bond, slave);
- write_unlock_bh(&bond->lock);
+ read_unlock(&bond->lock);
if (res) {
return res;
diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
index 15c1f7a..6909bec 100644
--- a/drivers/net/bonding/bond_main.c
+++ b/drivers/net/bonding/bond_main.c
@@ -1846,9 +1846,9 @@ int bond_release(struct net_device *bond_dev, struct net_device *slave_dev)
*/
void bond_destroy(struct bonding *bond)
{
+ unregister_netdevice(bond->dev);
bond_deinit(bond->dev);
bond_destroy_sysfs_entry(bond);
- unregister_netdevice(bond->dev);
}
/*
@@ -2057,9 +2057,9 @@ static int bond_info_query(struct net_device *bond_dev, struct ifbond *info)
info->bond_mode = bond->params.mode;
info->miimon = bond->params.miimon;
- read_lock_bh(&bond->lock);
+ read_lock(&bond->lock);
info->num_slaves = bond->slave_cnt;
- read_unlock_bh(&bond->lock);
+ read_unlock(&bond->lock);
return 0;
}
@@ -2074,7 +2074,7 @@ static int bond_slave_info_query(struct net_device *bond_dev, struct ifslave *in
return -ENODEV;
}
- read_lock_bh(&bond->lock);
+ read_lock(&bond->lock);
bond_for_each_slave(bond, slave, i) {
if (i == (int)info->slave_id) {
@@ -2083,7 +2083,7 @@ static int bond_slave_info_query(struct net_device *bond_dev, struct ifslave *in
}
}
- read_unlock_bh(&bond->lock);
+ read_unlock(&bond->lock);
if (found) {
strcpy(info->slave_name, slave->dev->name);
@@ -3078,7 +3078,7 @@ static void *bond_info_seq_start(struct seq_file *seq, loff_t *pos)
/* make sure the bond won't be taken away */
read_lock(&dev_base_lock);
- read_lock_bh(&bond->lock);
+ read_lock(&bond->lock);
if (*pos == 0) {
return SEQ_START_TOKEN;
@@ -3112,7 +3112,7 @@ static void bond_info_seq_stop(struct seq_file *seq, void *v)
{
struct bonding *bond = seq->private;
- read_unlock_bh(&bond->lock);
+ read_unlock(&bond->lock);
read_unlock(&dev_base_lock);
}
@@ -3821,13 +3821,13 @@ static int bond_do_ioctl(struct net_device *bond_dev, struct ifreq *ifr, int cmd
if (mii->reg_num == 1) {
struct bonding *bond = bond_dev->priv;
mii->val_out = 0;
- read_lock_bh(&bond->lock);
+ read_lock(&bond->lock);
read_lock(&bond->curr_slave_lock);
if (netif_carrier_ok(bond->dev)) {
mii->val_out = BMSR_LSTATUS;
}
read_unlock(&bond->curr_slave_lock);
- read_unlock_bh(&bond->lock);
+ read_unlock(&bond->lock);
}
return 0;
@@ -4473,8 +4473,8 @@ static void bond_free_all(void)
bond_mc_list_destroy(bond);
/* Release the bonded slaves */
bond_release_all(bond_dev);
- bond_deinit(bond_dev);
unregister_netdevice(bond_dev);
+ bond_deinit(bond_dev);
}
#ifdef CONFIG_PROC_FS
diff --git a/drivers/net/bonding/bond_sysfs.c b/drivers/net/bonding/bond_sysfs.c
index ffa62a7..e3b12e5 100644
--- a/drivers/net/bonding/bond_sysfs.c
+++ b/drivers/net/bonding/bond_sysfs.c
@@ -229,7 +229,7 @@ static ssize_t bonding_show_slaves(struct device *d,
int i, res = 0;
struct bonding *bond = to_bond(d);
- read_lock_bh(&bond->lock);
+ read_lock(&bond->lock);
bond_for_each_slave(bond, slave, i) {
if (res > (PAGE_SIZE - IFNAMSIZ)) {
/* not enough space for another interface name */
@@ -240,7 +240,7 @@ static ssize_t bonding_show_slaves(struct device *d,
}
res += sprintf(buf + res, "%s ", slave->dev->name);
}
- read_unlock_bh(&bond->lock);
+ read_unlock(&bond->lock);
res += sprintf(buf + res, "\n");
res++;
return res;
@@ -282,18 +282,18 @@ static ssize_t bonding_store_slaves(struct device *d,
/* Got a slave name in ifname. Is it already in the list? */
found = 0;
- read_lock_bh(&bond->lock);
+ read_lock(&bond->lock);
bond_for_each_slave(bond, slave, i)
if (strnicmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
printk(KERN_ERR DRV_NAME
": %s: Interface %s is already enslaved!\n",
bond->dev->name, ifname);
ret = -EPERM;
- read_unlock_bh(&bond->lock);
+ read_unlock(&bond->lock);
goto out;
}
- read_unlock_bh(&bond->lock);
+ read_unlock(&bond->lock);
printk(KERN_INFO DRV_NAME ": %s: Adding slave %s.\n",
bond->dev->name, ifname);
dev = dev_get_by_name(&init_net, ifname);
@@ -1133,6 +1133,9 @@ static ssize_t bonding_store_primary(struct device *d,
}
out:
write_unlock_bh(&bond->lock);
+
+ rtnl_unlock();
+
return count;
}
static DEVICE_ATTR(primary, S_IRUGO | S_IWUSR, bonding_show_primary, bonding_store_primary);
@@ -1190,6 +1193,7 @@ static ssize_t bonding_show_active_slave(struct device *d,
struct bonding *bond = to_bond(d);
int count;
+ rtnl_lock();
read_lock(&bond->curr_slave_lock);
curr = bond->curr_active_slave;
@@ -1269,6 +1273,8 @@ static ssize_t bonding_store_active_slave(struct device *d,
}
out:
write_unlock_bh(&bond->lock);
+ rtnl_unlock();
+
return count;
}
--
1.5.3.4.206.g58ba4-dirty
-
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Powered by blists - more mailing lists