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authorStephen Hemminger <shemminger@linux-foundation.org>2007-03-04 16:11:51 -0800
committerDavid S. Miller <davem@sunset.davemloft.net>2007-04-25 22:23:31 -0700
commit39df232f1a9ba48d41c68ee7d4046756e709cf91 (patch)
tree8778c69e9b70f55d9c3161674887f3de217a0d6a
parent[PKTGEN]: don't use __constant_htonl() (diff)
downloadlinux-dev-39df232f1a9ba48d41c68ee7d4046756e709cf91.tar.xz
linux-dev-39df232f1a9ba48d41c68ee7d4046756e709cf91.zip
[PKTGEN]: fix device name handling
Since devices can change name and other wierdness, don't hold onto a copy of device name, instead use pointer to output device. Fix a couple of leaks in error handling path as well. Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org> Signed-off-by: Robert Olsson <robert.olsson@its.uu.se> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--net/core/pktgen.c137
1 files changed, 70 insertions, 67 deletions
diff --git a/net/core/pktgen.c b/net/core/pktgen.c
index edf46fbb27d1..895739fdfac3 100644
--- a/net/core/pktgen.c
+++ b/net/core/pktgen.c
@@ -211,15 +211,11 @@ struct flow_state {
};
struct pktgen_dev {
-
/*
* Try to keep frequent/infrequent used vars. separated.
*/
-
- char ifname[IFNAMSIZ];
- char result[512];
-
- struct pktgen_thread *pg_thread; /* the owner */
+ struct proc_dir_entry *entry; /* proc file */
+ struct pktgen_thread *pg_thread;/* the owner */
struct list_head list; /* Used for chaining in the thread's run-queue */
int running; /* if this changes to false, the test will stop */
@@ -346,6 +342,8 @@ struct pktgen_dev {
unsigned cflows; /* Concurrent flows (config) */
unsigned lflow; /* Flow length (config) */
unsigned nflows; /* accumulated flows (stats) */
+
+ char result[512];
};
struct pktgen_hdr {
@@ -498,7 +496,7 @@ static void pktgen_stop_all_threads_ifs(void);
static int pktgen_stop_device(struct pktgen_dev *pkt_dev);
static void pktgen_stop(struct pktgen_thread *t);
static void pktgen_clear_counters(struct pktgen_dev *pkt_dev);
-static int pktgen_mark_device(const char *ifname);
+
static unsigned int scan_ip6(const char *s, char ip[16]);
static unsigned int fmt_ip6(char *s, const char ip[16]);
@@ -592,7 +590,7 @@ static int pktgen_if_show(struct seq_file *seq, void *v)
" frags: %d delay: %u clone_skb: %d ifname: %s\n",
pkt_dev->nfrags,
1000 * pkt_dev->delay_us + pkt_dev->delay_ns,
- pkt_dev->clone_skb, pkt_dev->ifname);
+ pkt_dev->clone_skb, pkt_dev->odev->name);
seq_printf(seq, " flows: %u flowlen: %u\n", pkt_dev->cflows,
pkt_dev->lflow);
@@ -1683,13 +1681,13 @@ static int pktgen_thread_show(struct seq_file *seq, void *v)
if_lock(t);
list_for_each_entry(pkt_dev, &t->if_list, list)
if (pkt_dev->running)
- seq_printf(seq, "%s ", pkt_dev->ifname);
+ seq_printf(seq, "%s ", pkt_dev->odev->name);
seq_printf(seq, "\nStopped: ");
list_for_each_entry(pkt_dev, &t->if_list, list)
if (!pkt_dev->running)
- seq_printf(seq, "%s ", pkt_dev->ifname);
+ seq_printf(seq, "%s ", pkt_dev->odev->name);
if (t->result[0])
seq_printf(seq, "\nResult: %s\n", t->result);
@@ -1835,12 +1833,11 @@ static struct pktgen_dev *__pktgen_NN_threads(const char *ifname, int remove)
/*
* mark a device for removal
*/
-static int pktgen_mark_device(const char *ifname)
+static void pktgen_mark_device(const char *ifname)
{
struct pktgen_dev *pkt_dev = NULL;
const int max_tries = 10, msec_per_try = 125;
int i = 0;
- int ret = 0;
mutex_lock(&pktgen_thread_lock);
pr_debug("pktgen: pktgen_mark_device marking %s for removal\n", ifname);
@@ -1861,32 +1858,49 @@ static int pktgen_mark_device(const char *ifname)
printk("pktgen_mark_device: timed out after waiting "
"%d msec for device %s to be removed\n",
msec_per_try * i, ifname);
- ret = 1;
break;
}
}
mutex_unlock(&pktgen_thread_lock);
+}
- return ret;
+static void pktgen_change_name(struct net_device *dev)
+{
+ struct pktgen_thread *t;
+
+ list_for_each_entry(t, &pktgen_threads, th_list) {
+ struct pktgen_dev *pkt_dev;
+
+ list_for_each_entry(pkt_dev, &t->if_list, list) {
+ if (pkt_dev->odev != dev)
+ continue;
+
+ remove_proc_entry(pkt_dev->entry->name, pg_proc_dir);
+
+ pkt_dev->entry = create_proc_entry(dev->name, 0600,
+ pg_proc_dir);
+ if (!pkt_dev->entry)
+ printk(KERN_ERR "pktgen: can't move proc "
+ " entry for '%s'\n", dev->name);
+ break;
+ }
+ }
}
static int pktgen_device_event(struct notifier_block *unused,
unsigned long event, void *ptr)
{
- struct net_device *dev = (struct net_device *)(ptr);
+ struct net_device *dev = ptr;
/* It is OK that we do not hold the group lock right now,
* as we run under the RTNL lock.
*/
switch (event) {
- case NETDEV_CHANGEADDR:
- case NETDEV_GOING_DOWN:
- case NETDEV_DOWN:
- case NETDEV_UP:
- /* Ignore for now */
+ case NETDEV_CHANGENAME:
+ pktgen_change_name(dev);
break;
case NETDEV_UNREGISTER:
@@ -1899,41 +1913,36 @@ static int pktgen_device_event(struct notifier_block *unused,
/* Associate pktgen_dev with a device. */
-static struct net_device *pktgen_setup_dev(struct pktgen_dev *pkt_dev)
+static int pktgen_setup_dev(struct pktgen_dev *pkt_dev, const char *ifname)
{
struct net_device *odev;
+ int err;
/* Clean old setups */
-
if (pkt_dev->odev) {
dev_put(pkt_dev->odev);
pkt_dev->odev = NULL;
}
- odev = dev_get_by_name(pkt_dev->ifname);
-
+ odev = dev_get_by_name(ifname);
if (!odev) {
- printk("pktgen: no such netdevice: \"%s\"\n", pkt_dev->ifname);
- goto out;
+ printk("pktgen: no such netdevice: \"%s\"\n", ifname);
+ return -ENODEV;
}
+
if (odev->type != ARPHRD_ETHER) {
- printk("pktgen: not an ethernet device: \"%s\"\n",
- pkt_dev->ifname);
- goto out_put;
- }
- if (!netif_running(odev)) {
- printk("pktgen: device is down: \"%s\"\n", pkt_dev->ifname);
- goto out_put;
+ printk("pktgen: not an ethernet device: \"%s\"\n", ifname);
+ err = -EINVAL;
+ } else if (!netif_running(odev)) {
+ printk("pktgen: device is down: \"%s\"\n", ifname);
+ err = -ENETDOWN;
+ } else {
+ pkt_dev->odev = odev;
+ return 0;
}
- pkt_dev->odev = odev;
- return pkt_dev->odev;
-
-out_put:
dev_put(odev);
-out:
- return NULL;
-
+ return err;
}
/* Read pkt_dev from the interface and set up internal pktgen_dev
@@ -1941,10 +1950,6 @@ out:
*/
static void pktgen_setup_inject(struct pktgen_dev *pkt_dev)
{
- /* Try once more, just in case it works now. */
- if (!pkt_dev->odev)
- pktgen_setup_dev(pkt_dev);
-
if (!pkt_dev->odev) {
printk("pktgen: ERROR: pkt_dev->odev == NULL in setup_inject.\n");
sprintf(pkt_dev->result,
@@ -2988,7 +2993,7 @@ static int pktgen_stop_device(struct pktgen_dev *pkt_dev)
if (!pkt_dev->running) {
printk("pktgen: interface: %s is already stopped\n",
- pkt_dev->ifname);
+ pkt_dev->odev->name);
return -EINVAL;
}
@@ -3340,7 +3345,7 @@ static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
if_lock(t);
list_for_each_entry(p, &t->if_list, list)
- if (strncmp(p->ifname, ifname, IFNAMSIZ) == 0) {
+ if (strncmp(p->odev->name, ifname, IFNAMSIZ) == 0) {
pkt_dev = p;
break;
}
@@ -3381,7 +3386,7 @@ out:
static int pktgen_add_device(struct pktgen_thread *t, const char *ifname)
{
struct pktgen_dev *pkt_dev;
- struct proc_dir_entry *pe;
+ int err;
/* We don't allow a device to be on several threads */
@@ -3423,29 +3428,28 @@ static int pktgen_add_device(struct pktgen_thread *t, const char *ifname)
pkt_dev->svlan_cfi = 0;
pkt_dev->svlan_id = 0xffff;
- strncpy(pkt_dev->ifname, ifname, IFNAMSIZ);
-
- if (!pktgen_setup_dev(pkt_dev)) {
- printk("pktgen: ERROR: pktgen_setup_dev failed.\n");
- if (pkt_dev->flows)
- vfree(pkt_dev->flows);
- kfree(pkt_dev);
- return -ENODEV;
- }
+ err = pktgen_setup_dev(pkt_dev, ifname);
+ if (err)
+ goto out1;
- pe = create_proc_entry(ifname, 0600, pg_proc_dir);
- if (!pe) {
+ pkt_dev->entry = create_proc_entry(ifname, 0600, pg_proc_dir);
+ if (!pkt_dev->entry) {
printk("pktgen: cannot create %s/%s procfs entry.\n",
PG_PROC_DIR, ifname);
- if (pkt_dev->flows)
- vfree(pkt_dev->flows);
- kfree(pkt_dev);
- return -EINVAL;
+ err = -EINVAL;
+ goto out2;
}
- pe->proc_fops = &pktgen_if_fops;
- pe->data = pkt_dev;
+ pkt_dev->entry->proc_fops = &pktgen_if_fops;
+ pkt_dev->entry->data = pkt_dev;
return add_dev_to_thread(t, pkt_dev);
+out2:
+ dev_put(pkt_dev->odev);
+out1:
+ if (pkt_dev->flows)
+ vfree(pkt_dev->flows);
+ kfree(pkt_dev);
+ return err;
}
static int __init pktgen_create_thread(int cpu)
@@ -3533,9 +3537,8 @@ static int pktgen_remove_device(struct pktgen_thread *t,
_rem_dev_from_if_list(t, pkt_dev);
- /* Clean up proc file system */
-
- remove_proc_entry(pkt_dev->ifname, pg_proc_dir);
+ if (pkt_dev->entry)
+ remove_proc_entry(pkt_dev->entry->name, pg_proc_dir);
if (pkt_dev->flows)
vfree(pkt_dev->flows);