aboutsummaryrefslogtreecommitdiffstats
path: root/net/dccp/ccids/lib/loss_interval.c
diff options
context:
space:
mode:
Diffstat (limited to 'net/dccp/ccids/lib/loss_interval.c')
-rw-r--r--net/dccp/ccids/lib/loss_interval.c92
1 files changed, 31 insertions, 61 deletions
diff --git a/net/dccp/ccids/lib/loss_interval.c b/net/dccp/ccids/lib/loss_interval.c
index 28eac9b..e6b1f0c 100644
--- a/net/dccp/ccids/lib/loss_interval.c
+++ b/net/dccp/ccids/lib/loss_interval.c
@@ -18,71 +18,26 @@
#include "packet_history.h"
#include "tfrc.h"
-struct dccp_li_hist *dccp_li_hist_new(const char *name)
-{
- struct dccp_li_hist *hist = kmalloc(sizeof(*hist), GFP_ATOMIC);
- static const char dccp_li_hist_mask[] = "li_hist_%s";
- char *slab_name;
-
- if (hist == NULL)
- goto out;
-
- slab_name = kmalloc(strlen(name) + sizeof(dccp_li_hist_mask) - 1,
- GFP_ATOMIC);
- if (slab_name == NULL)
- goto out_free_hist;
-
- sprintf(slab_name, dccp_li_hist_mask, name);
- hist->dccplih_slab = kmem_cache_create(slab_name,
- sizeof(struct dccp_li_hist_entry),
- 0, SLAB_HWCACHE_ALIGN,
- NULL, NULL);
- if (hist->dccplih_slab == NULL)
- goto out_free_slab_name;
-out:
- return hist;
-out_free_slab_name:
- kfree(slab_name);
-out_free_hist:
- kfree(hist);
- hist = NULL;
- goto out;
-}
-
-EXPORT_SYMBOL_GPL(dccp_li_hist_new);
-
-void dccp_li_hist_delete(struct dccp_li_hist *hist)
-{
- const char* name = kmem_cache_name(hist->dccplih_slab);
-
- kmem_cache_destroy(hist->dccplih_slab);
- kfree(name);
- kfree(hist);
-}
-
-EXPORT_SYMBOL_GPL(dccp_li_hist_delete);
+struct kmem_cache *dccp_li_cachep __read_mostly;
-static inline struct dccp_li_hist_entry *
- dccp_li_hist_entry_new(struct dccp_li_hist *hist,
- const gfp_t prio)
+static inline struct dccp_li_hist_entry *dccp_li_hist_entry_new(const gfp_t prio)
{
- return kmem_cache_alloc(hist->dccplih_slab, prio);
+ return kmem_cache_alloc(dccp_li_cachep, prio);
}
-static inline void dccp_li_hist_entry_delete(struct dccp_li_hist *hist,
- struct dccp_li_hist_entry *entry)
+static inline void dccp_li_hist_entry_delete(struct dccp_li_hist_entry *entry)
{
if (entry != NULL)
- kmem_cache_free(hist->dccplih_slab, entry);
+ kmem_cache_free(dccp_li_cachep, entry);
}
-void dccp_li_hist_purge(struct dccp_li_hist *hist, struct list_head *list)
+void dccp_li_hist_purge(struct list_head *list)
{
struct dccp_li_hist_entry *entry, *next;
list_for_each_entry_safe(entry, next, list, dccplih_node) {
list_del_init(&entry->dccplih_node);
- kmem_cache_free(hist->dccplih_slab, entry);
+ kmem_cache_free(dccp_li_cachep, entry);
}
}
@@ -134,17 +89,16 @@ u32 dccp_li_hist_calc_i_mean(struct list_head *list)
EXPORT_SYMBOL_GPL(dccp_li_hist_calc_i_mean);
-static int dccp_li_hist_interval_new(struct dccp_li_hist *hist,
- struct list_head *list,
+static int dccp_li_hist_interval_new(struct list_head *list,
const u64 seq_loss, const u8 win_loss)
{
struct dccp_li_hist_entry *entry;
int i;
for (i = 0; i < DCCP_LI_HIST_IVAL_F_LENGTH; i++) {
- entry = dccp_li_hist_entry_new(hist, GFP_ATOMIC);
+ entry = dccp_li_hist_entry_new(GFP_ATOMIC);
if (entry == NULL) {
- dccp_li_hist_purge(hist, list);
+ dccp_li_hist_purge(list);
DCCP_BUG("loss interval list entry is NULL");
return 0;
}
@@ -260,7 +214,7 @@ found:
return 1000000 / p;
}
-void dccp_li_update_li(struct sock *sk, struct dccp_li_hist *li_hist,
+void dccp_li_update_li(struct sock *sk,
struct list_head *li_hist_list,
struct list_head *hist_list,
struct timeval *last_feedback, u16 s, u32 bytes_recv,
@@ -270,8 +224,8 @@ void dccp_li_update_li(struct sock *sk, struct dccp_li_hist *li_hist,
u64 seq_temp;
if (list_empty(li_hist_list)) {
- if (!dccp_li_hist_interval_new(li_hist, li_hist_list,
- seq_loss, win_loss))
+ if (!dccp_li_hist_interval_new(li_hist_list, seq_loss,
+ win_loss))
return;
head = list_entry(li_hist_list->next, struct dccp_li_hist_entry,
@@ -293,7 +247,7 @@ void dccp_li_update_li(struct sock *sk, struct dccp_li_hist *li_hist,
/* new loss event detected */
/* calculate last interval length */
seq_temp = dccp_delta_seqno(head->dccplih_seqno, seq_loss);
- entry = dccp_li_hist_entry_new(li_hist, GFP_ATOMIC);
+ entry = dccp_li_hist_entry_new(GFP_ATOMIC);
if (entry == NULL) {
DCCP_BUG("out of memory - can not allocate entry");
@@ -304,7 +258,7 @@ void dccp_li_update_li(struct sock *sk, struct dccp_li_hist *li_hist,
tail = li_hist_list->prev;
list_del(tail);
- kmem_cache_free(li_hist->dccplih_slab, tail);
+ kmem_cache_free(dccp_li_cachep, tail);
/* Create the newest interval */
entry->dccplih_seqno = seq_loss;
@@ -314,3 +268,19 @@ void dccp_li_update_li(struct sock *sk, struct dccp_li_hist *li_hist,
}
EXPORT_SYMBOL_GPL(dccp_li_update_li);
+
+static __init int dccp_li_init(void)
+{
+ dccp_li_cachep = kmem_cache_create("dccp_li_hist",
+ sizeof(struct dccp_li_hist_entry),
+ 0, SLAB_HWCACHE_ALIGN, NULL, NULL);
+ return dccp_li_cachep == NULL ? -ENOBUFS : 0;
+}
+
+static __exit void dccp_li_exit(void)
+{
+ kmem_cache_destroy(dccp_li_cachep);
+}
+
+module_init(dccp_li_init);
+module_exit(dccp_li_exit);