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authorNikolay Aleksandrov <nikolay@redhat.com>2014-08-01 12:29:45 +0200
committerDavid S. Miller <davem@davemloft.net>2014-08-02 15:31:31 -0700
commit1ab1934ed80aa90b268a62a561f8fdc60812793c (patch)
tree54871d634248ce8a9d330f2395bf39fef482644a /include/net
parent06aa8b8a0345c78f4d9a1fb3f852952b12a0e40c (diff)
downloadlinux-1ab1934ed80aa90b268a62a561f8fdc60812793c.tar.bz2
inet: frags: enum the flag definitions and add descriptions
Move the flags to an enum definion, swap FIRST_IN/LAST_IN to be in increasing order and add comments explaining each flag and the inet_frag_queue struct members. Signed-off-by: Nikolay Aleksandrov <nikolay@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net')
-rw-r--r--include/net/inet_frag.h46
1 files changed, 35 insertions, 11 deletions
diff --git a/include/net/inet_frag.h b/include/net/inet_frag.h
index 5024d6c20407..90015c47b447 100644
--- a/include/net/inet_frag.h
+++ b/include/net/inet_frag.h
@@ -15,25 +15,49 @@ struct netns_frags {
int low_thresh;
};
+/**
+ * fragment queue flags
+ *
+ * @INET_FRAG_FIRST_IN: first fragment has arrived
+ * @INET_FRAG_LAST_IN: final fragment has arrived
+ * @INET_FRAG_COMPLETE: frag queue has been processed and is due for destruction
+ * @INET_FRAG_EVICTED: frag queue is being evicted
+ */
+enum {
+ INET_FRAG_FIRST_IN = BIT(0),
+ INET_FRAG_LAST_IN = BIT(1),
+ INET_FRAG_COMPLETE = BIT(2),
+ INET_FRAG_EVICTED = BIT(3)
+};
+
+/**
+ * struct inet_frag_queue - fragment queue
+ *
+ * @lock: spinlock protecting the queue
+ * @timer: queue expiration timer
+ * @list: hash bucket list
+ * @refcnt: reference count of the queue
+ * @fragments: received fragments head
+ * @fragments_tail: received fragments tail
+ * @stamp: timestamp of the last received fragment
+ * @len: total length of the original datagram
+ * @meat: length of received fragments so far
+ * @flags: fragment queue flags
+ * @max_size: (ipv4 only) maximum received fragment size with IP_DF set
+ * @net: namespace that this frag belongs to
+ */
struct inet_frag_queue {
spinlock_t lock;
- struct timer_list timer; /* when will this queue expire? */
+ struct timer_list timer;
struct hlist_node list;
atomic_t refcnt;
- struct sk_buff *fragments; /* list of received fragments */
+ struct sk_buff *fragments;
struct sk_buff *fragments_tail;
ktime_t stamp;
- int len; /* total length of orig datagram */
+ int len;
int meat;
- __u8 flags; /* first/last segment arrived? */
-
-#define INET_FRAG_EVICTED 8
-#define INET_FRAG_COMPLETE 4
-#define INET_FRAG_FIRST_IN 2
-#define INET_FRAG_LAST_IN 1
-
+ __u8 flags;
u16 max_size;
-
struct netns_frags *net;
};