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sctp: convert to genradix

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This also makes sctp_stream_alloc_(out|in) saner, in that they no longer
allocate new flex_arrays/genradixes, they just preallocate more
elements.

This code does however have a suspicious lack of locking.

Link: http://lkml.kernel.org/r/20181217131929.11727-7-kent.overstreet@gmail.com
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Cc: Vlad Yasevich <vyasevich@gmail.com>
Cc: Neil Horman <nhorman@tuxdriver.com>
Cc: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Eric Paris <eparis@parisplace.org>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Paul Moore <paul@paul-moore.com>
Cc: Pravin B Shelar <pshelar@ovn.org>
Cc: Shaohua Li <shli@kernel.org>
Cc: Stephen Smalley <sds@tycho.nsa.gov>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Kent Overstreet
2019-03-11 23:31:22 -07:00
committed by Linus Torvalds
parent 94f8f3b02e
commit 2075e50caf
3 changed files with 28 additions and 114 deletions
Download Patch File Download Diff File Expand all files Collapse all files

15
include/net/sctp/structs.h
View File

@@ -48,6 +48,7 @@
#define __sctp_structs_h__
#include <linux/ktime.h>
#include <linux/generic-radix-tree.h>
#include <linux/rhashtable-types.h>
#include <linux/socket.h> /* linux/in.h needs this!! */
#include <linux/in.h> /* We get struct sockaddr_in. */
@@ -57,7 +58,6 @@
#include <linux/atomic.h> /* This gets us atomic counters. */
#include <linux/skbuff.h> /* We need sk_buff_head. */
#include <linux/workqueue.h> /* We need tq_struct. */
#include <linux/flex_array.h> /* We need flex_array. */
#include <linux/sctp.h> /* We need sctp* header structs. */
#include <net/sctp/auth.h> /* We need auth specific structs */
#include <net/ip.h> /* For inet_skb_parm */
@@ -1449,8 +1449,9 @@ struct sctp_stream_in {
};
struct sctp_stream {
struct flex_array *out;
struct flex_array *in;
GENRADIX(struct sctp_stream_out) out;
GENRADIX(struct sctp_stream_in) in;
__u16 outcnt;
__u16 incnt;
/* Current stream being sent, if any */
@@ -1473,17 +1474,17 @@ struct sctp_stream {
};
static inline struct sctp_stream_out *sctp_stream_out(
const struct sctp_stream *stream,
struct sctp_stream *stream,
__u16 sid)
{
return flex_array_get(stream->out, sid);
return genradix_ptr(&stream->out, sid);
}
static inline struct sctp_stream_in *sctp_stream_in(
const struct sctp_stream *stream,
struct sctp_stream *stream,
__u16 sid)
{
return flex_array_get(stream->in, sid);
return genradix_ptr(&stream->in, sid);
}
#define SCTP_SO(s, i) sctp_stream_out((s), (i))