This patch ports the per-thread interface list list to the in-kernel linked
list implementation. In the general, the resulting code is a bit simpler.
Signed-off-by: Luiz Capitulino <[email protected]>
---
net/core/pktgen.c | 92 +++++++++++++++++++++++++----------------------------
1 files changed, 44 insertions(+), 48 deletions(-)
31bc49027940cd679fff67215c72c82fe958ad20
diff --git a/net/core/pktgen.c b/net/core/pktgen.c
index 89480e3..5d13626 100644
--- a/net/core/pktgen.c
+++ b/net/core/pktgen.c
@@ -210,7 +210,7 @@ struct pktgen_dev {
char result[512];
struct pktgen_thread *pg_thread; /* the owner */
- struct pktgen_dev *next; /* Used for chaining in the thread's run-queue */
+ struct list_head list; /* Used for chaining in the thread's run-queue */
int running; /* if this changes to false, the test will stop */
@@ -330,7 +330,7 @@ struct pktgen_hdr {
struct pktgen_thread {
spinlock_t if_lock;
- struct pktgen_dev *if_list; /* All device here */
+ struct list_head if_list; /* All device here */
struct list_head th_list;
int removed;
char name[32];
@@ -1378,7 +1378,7 @@ static struct file_operations pktgen_if_
static int pktgen_thread_show(struct seq_file *seq, void *v)
{
struct pktgen_thread *t = seq->private;
- struct pktgen_dev *pkt_dev = NULL;
+ struct pktgen_dev *pkt_dev;
BUG_ON(!t);
@@ -1388,13 +1388,13 @@ static int pktgen_thread_show(struct seq
seq_printf(seq, "Running: ");
if_lock(t);
- for (pkt_dev = t->if_list; pkt_dev; pkt_dev = pkt_dev->next)
+ list_for_each_entry(pkt_dev, &t->if_list, list)
if (pkt_dev->running)
seq_printf(seq, "%s ", pkt_dev->ifname);
seq_printf(seq, "\nStopped: ");
- for (pkt_dev = t->if_list; pkt_dev; pkt_dev = pkt_dev->next)
+ list_for_each_entry(pkt_dev, &t->if_list, list)
if (!pkt_dev->running)
seq_printf(seq, "%s ", pkt_dev->ifname);
@@ -2421,13 +2421,13 @@ static void pktgen_clear_counters(struct
static void pktgen_run(struct pktgen_thread *t)
{
- struct pktgen_dev *pkt_dev = NULL;
+ struct pktgen_dev *pkt_dev;
int started = 0;
PG_DEBUG(printk("pktgen: entering pktgen_run. %p\n", t));
if_lock(t);
- for (pkt_dev = t->if_list; pkt_dev; pkt_dev = pkt_dev->next) {
+ list_for_each_entry(pkt_dev, &t->if_list, list) {
/*
* setup odev and create initial packet.
@@ -2468,15 +2468,14 @@ static void pktgen_stop_all_threads_ifs(
static int thread_is_running(struct pktgen_thread *t)
{
- struct pktgen_dev *next;
+ struct pktgen_dev *pkt_dev;
int res = 0;
- for (next = t->if_list; next; next = next->next) {
- if (next->running) {
+ list_for_each_entry(pkt_dev, &t->if_list, list)
+ if (pkt_dev->running) {
res = 1;
break;
}
- }
return res;
}
@@ -2597,17 +2596,17 @@ static int pktgen_stop_device(struct pkt
static struct pktgen_dev *next_to_run(struct pktgen_thread *t)
{
- struct pktgen_dev *next, *best = NULL;
+ struct pktgen_dev *pkt_dev, *best = NULL;
if_lock(t);
- for (next = t->if_list; next; next = next->next) {
- if (!next->running)
+ list_for_each_entry(pkt_dev, &t->if_list, list) {
+ if (!pkt_dev->running)
continue;
if (best == NULL)
- best = next;
- else if (next->next_tx_us < best->next_tx_us)
- best = next;
+ best = pkt_dev;
+ else if (pkt_dev->next_tx_us < best->next_tx_us)
+ best = pkt_dev;
}
if_unlock(t);
return best;
@@ -2615,18 +2614,18 @@ static struct pktgen_dev *next_to_run(st
static void pktgen_stop(struct pktgen_thread *t)
{
- struct pktgen_dev *next = NULL;
+ struct pktgen_dev *pkt_dev;
PG_DEBUG(printk("pktgen: entering pktgen_stop\n"));
if_lock(t);
- for (next = t->if_list; next; next = next->next) {
- pktgen_stop_device(next);
- if (next->skb)
- kfree_skb(next->skb);
+ list_for_each_entry(pkt_dev, &t->if_list, list) {
+ pktgen_stop_device(pkt_dev);
+ if (pkt_dev->skb)
+ kfree_skb(pkt_dev->skb);
- next->skb = NULL;
+ pkt_dev->skb = NULL;
}
if_unlock(t);
@@ -2638,14 +2637,15 @@ static void pktgen_stop(struct pktgen_th
*/
static void pktgen_rem_one_if(struct pktgen_thread *t)
{
- struct pktgen_dev *cur, *next = NULL;
+ struct list_head *q, *n;
+ struct pktgen_dev *cur;
PG_DEBUG(printk("pktgen: entering pktgen_rem_one_if\n"));
if_lock(t);
- for (cur = t->if_list; cur; cur = next) {
- next = cur->next;
+ list_for_each_safe(q, n, &t->if_list) {
+ cur = list_entry(q, struct pktgen_dev, list);
if (!cur->removal_mark)
continue;
@@ -2664,15 +2664,16 @@ static void pktgen_rem_one_if(struct pkt
static void pktgen_rem_all_ifs(struct pktgen_thread *t)
{
- struct pktgen_dev *cur, *next = NULL;
+ struct list_head *q, *n;
+ struct pktgen_dev *cur;
/* Remove all devices, free mem */
PG_DEBUG(printk("pktgen: entering pktgen_rem_all_ifs\n"));
if_lock(t);
- for (cur = t->if_list; cur; cur = next) {
- next = cur->next;
+ list_for_each_safe(q, n, &t->if_list) {
+ cur = list_entry(q, struct pktgen_dev, list);
if (cur->skb)
kfree_skb(cur->skb);
@@ -2959,14 +2960,14 @@ static void pktgen_thread_worker(struct
static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
const char *ifname)
{
- struct pktgen_dev *pkt_dev = NULL;
+ struct pktgen_dev *p, *pkt_dev = NULL;
if_lock(t);
- for (pkt_dev = t->if_list; pkt_dev; pkt_dev = pkt_dev->next) {
- if (strncmp(pkt_dev->ifname, ifname, IFNAMSIZ) == 0) {
+ list_for_each_entry(p, &t->if_list, list)
+ if (strncmp(p->ifname, ifname, IFNAMSIZ) == 0) {
+ pkt_dev = p;
break;
}
- }
if_unlock(t);
PG_DEBUG(printk("pktgen: find_dev(%s) returning %p\n", ifname, pkt_dev));
@@ -2989,8 +2990,8 @@ static int add_dev_to_thread(struct pktg
rv = -EBUSY;
goto out;
}
- pkt_dev->next = t->if_list;
- t->if_list = pkt_dev;
+
+ list_add(&pkt_dev->list, &t->if_list);
pkt_dev->pg_thread = t;
pkt_dev->running = 0;
@@ -3117,6 +3118,8 @@ static int __init pktgen_create_thread(c
pe->proc_fops = &pktgen_thread_fops;
pe->data = t;
+ INIT_LIST_HEAD(&t->if_list);
+
list_add_tail(&t->th_list, &pktgen_threads);
t->removed = 0;
@@ -3140,20 +3143,13 @@ static int __init pktgen_create_thread(c
static void _rem_dev_from_if_list(struct pktgen_thread *t,
struct pktgen_dev *pkt_dev)
{
- struct pktgen_dev *i, *prev = NULL;
-
- i = t->if_list;
+ struct list_head *q, *n;
+ struct pktgen_dev *p;
- while (i) {
- if (i == pkt_dev) {
- if (prev)
- prev->next = i->next;
- else
- t->if_list = NULL;
- break;
- }
- prev = i;
- i = i->next;
+ list_for_each_safe(q, n, &t->if_list) {
+ p = list_entry(q, struct pktgen_dev, list);
+ if (p == pkt_dev)
+ list_del(&p->list);
}
}
--
1.2.1.g3397f9
--
Luiz Fernando N. Capitulino