From b7aa0bf70c4afb9e38be25f5c0922498d0f8684c Mon Sep 17 00:00:00 2001 From: Eric Dumazet Date: Thu, 19 Apr 2007 16:16:32 -0700 Subject: [NET]: convert network timestamps to ktime_t We currently use a special structure (struct skb_timeval) and plain 'struct timeval' to store packet timestamps in sk_buffs and struct sock. This has some drawbacks : - Fixed resolution of micro second. - Waste of space on 64bit platforms where sizeof(struct timeval)=16 I suggest using ktime_t that is a nice abstraction of high resolution time services, currently capable of nanosecond resolution. As sizeof(ktime_t) is 8 bytes, using ktime_t in 'struct sock' permits a 8 byte shrink of this structure on 64bit architectures. Some other structures also benefit from this size reduction (struct ipq in ipv4/ip_fragment.c, struct frag_queue in ipv6/reassembly.c, ...) Once this ktime infrastructure adopted, we can more easily provide nanosecond resolution on top of it. (ioctl SIOCGSTAMPNS and/or SO_TIMESTAMPNS/SCM_TIMESTAMPNS) Note : this patch includes a bug correction in compat_sock_get_timestamp() where a "err = 0;" was missing (so this syscall returned -ENOENT instead of 0) Signed-off-by: Eric Dumazet CC: Stephen Hemminger CC: John find Signed-off-by: David S. Miller --- net/sunrpc/svcsock.c | 10 +++------- 1 file changed, 3 insertions(+), 7 deletions(-) (limited to 'net/sunrpc') diff --git a/net/sunrpc/svcsock.c b/net/sunrpc/svcsock.c index 2772fee..22f61ae 100644 --- a/net/sunrpc/svcsock.c +++ b/net/sunrpc/svcsock.c @@ -798,16 +798,12 @@ svc_udp_recvfrom(struct svc_rqst *rqstp) dprintk("svc: recvfrom returned error %d\n", -err); } rqstp->rq_addrlen = sizeof(rqstp->rq_addr); - if (skb->tstamp.off_sec == 0) { - struct timeval tv; - - tv.tv_sec = xtime.tv_sec; - tv.tv_usec = xtime.tv_nsec / NSEC_PER_USEC; - skb_set_timestamp(skb, &tv); + if (skb->tstamp.tv64 == 0) { + skb->tstamp = ktime_get_real(); /* Don't enable netstamp, sunrpc doesn't need that much accuracy */ } - skb_get_timestamp(skb, &svsk->sk_sk->sk_stamp); + svsk->sk_sk->sk_stamp = skb->tstamp; set_bit(SK_DATA, &svsk->sk_flags); /* there may be more data... */ /* -- cgit v1.1 From 604763722c655c7e3f31ecf6f7b4dafcd26a7a15 Mon Sep 17 00:00:00 2001 From: Herbert Xu Date: Mon, 9 Apr 2007 11:59:39 -0700 Subject: [NET]: Treat CHECKSUM_PARTIAL as CHECKSUM_UNNECESSARY When a transmitted packet is looped back directly, CHECKSUM_PARTIAL maps to the semantics of CHECKSUM_UNNECESSARY. Therefore we should treat it as such in the stack. Signed-off-by: Herbert Xu Signed-off-by: David S. Miller --- net/sunrpc/socklib.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'net/sunrpc') diff --git a/net/sunrpc/socklib.c b/net/sunrpc/socklib.c index 634885b..1d377d1 100644 --- a/net/sunrpc/socklib.c +++ b/net/sunrpc/socklib.c @@ -154,7 +154,7 @@ int csum_partial_copy_to_xdr(struct xdr_buf *xdr, struct sk_buff *skb) desc.offset = sizeof(struct udphdr); desc.count = skb->len - desc.offset; - if (skb->ip_summed == CHECKSUM_UNNECESSARY) + if (skb_csum_unnecessary(skb)) goto no_checksum; desc.csum = csum_partial(skb->data, desc.offset, skb->csum); -- cgit v1.1 From 14690fc649f4c59712f497135f7323eb8ceceaaf Mon Sep 17 00:00:00 2001 From: Martin Peschke Date: Thu, 26 Apr 2007 01:03:43 -0700 Subject: [SUNRPC]: cleanup: use seq_release_private() where appropriate We can save some lines of code by using seq_release_private(). Signed-off-by: Martin Peschke Acked-by: Neil Brown Signed-off-by: Andrew Morton Signed-off-by: David S. Miller --- net/sunrpc/cache.c | 10 +--------- 1 file changed, 1 insertion(+), 9 deletions(-) (limited to 'net/sunrpc') diff --git a/net/sunrpc/cache.c b/net/sunrpc/cache.c index f02f24a..543b085 100644 --- a/net/sunrpc/cache.c +++ b/net/sunrpc/cache.c @@ -1237,20 +1237,12 @@ static int content_open(struct inode *inode, struct file *file) return res; } -static int content_release(struct inode *inode, struct file *file) -{ - struct seq_file *m = (struct seq_file *)file->private_data; - struct handle *han = m->private; - kfree(han); - m->private = NULL; - return seq_release(inode, file); -} static const struct file_operations content_file_operations = { .open = content_open, .read = seq_read, .llseek = seq_lseek, - .release = content_release, + .release = seq_release_private, }; static ssize_t read_flush(struct file *file, char __user *buf, -- cgit v1.1