search for: tot_len

Hi: Here are the patches I used for testing KVM with virtio-net using TSO. There are three patches for the tun device which are basically Rusty's patches with the mmap turned into copying (for correctness). Two patches are for the virtio-net frontend, one required to support receiving SG/TSO, and the other useful for testing SG per se. The other patch is to the KVM backend to make all this

Hi: Here are the patches I used for testing KVM with virtio-net using TSO. There are three patches for the tun device which are basically Rusty's patches with the mmap turned into copying (for correctness). Two patches are for the virtio-net frontend, one required to support receiving SG/TSO, and the other useful for testing SG per se. The other patch is to the KVM backend to make all this

1) Turn GSO on virtio net into an all-or-nothing (keep checksumming separate). Having multiple bits is a pain: if you can't support something you should handle it in software, which is still a performance win. 2) Make VIRTIO_NET_HDR_GSO_ECN a flag in the header, so it can apply to IPv6 or v4. 3) Rename VIRTIO_NET_F_NO_CSUM to VIRTIO_NET_F_CSUM (ie. means we do checksumming). 4)

1) Turn GSO on virtio net into an all-or-nothing (keep checksumming separate). Having multiple bits is a pain: if you can't support something you should handle it in software, which is still a performance win. 2) Make VIRTIO_NET_HDR_GSO_ECN a flag in the header, so it can apply to IPv6 or v4. 3) Rename VIRTIO_NET_F_NO_CSUM to VIRTIO_NET_F_CSUM (ie. means we do checksumming). 4)

Il 19/06/2013 10:24, Michael S. Tsirkin ha scritto: >> > 2) We introduce VIRTIO_NET_F_ANY_LAYOUT and VIRTIO_BLK_F_ANY_LAYOUT >> > specifically for net and block (note the new names). So why not a transport feature? Is it just because the SCSI commands for virtio-blk also require a config space field? Sorry if I missed this upthread. Paolo >> > 3) I note the

Il 19/06/2013 10:24, Michael S. Tsirkin ha scritto: >> > 2) We introduce VIRTIO_NET_F_ANY_LAYOUT and VIRTIO_BLK_F_ANY_LAYOUT >> > specifically for net and block (note the new names). So why not a transport feature? Is it just because the SCSI commands for virtio-blk also require a config space field? Sorry if I missed this upthread. Paolo >> > 3) I note the

....c index d6bd607..35b877e 100644 --- a/fs/btrfs/snappy.c +++ b/fs/btrfs/snappy.c @@ -392,12 +392,16 @@ static int btrfs_snappy_decompress(struct list_head *ws, unsigned char *data_in, struct workspace *workspace = list_entry(ws, struct workspace, list); size_t in_len; size_t out_len; + size_t tot_len; int ret = 0; char *kaddr; unsigned long bytes; BUG_ON(srclen < SNAPPY_LEN); + tot_len = read_compress_length(data_in); + data_in += SNAPPY_LEN; + in_len = read_compress_length(data_in); data_in += SNAPPY_LEN; -- 1.7.3.1 -- To unsubscribe from this list: send the line "un...

...eq = 16; break; case IPPROTO_UDP: case IPPROTO_ICMP: size_req = 8; break; default: size_req = 0; } offset = (ntohs(ip->tot_len) < (ip->ihl<<2)+size_req); } As mentioned above, fragments with an offset of 0, that are too short to provide a full transport protocol header, are treated like non-first fragments. This allows an attacker to perform the following port rewriting attack: 1. Attacker sends a fra...

...\ + do { BUG_ON(!(_vq)->in_use); (_vq)->in_use = 0; } while(0) + +static bool device_torture; +module_param(device_torture, bool, 0644); + +struct torture { + unsigned int orig_out, orig_in; + void *orig_data; + struct scatterlist sg[4]; + struct scatterlist orig_sg[]; +}; + +static unsigned tot_len(struct scatterlist sg[], unsigned num) +{ + unsigned len, i; + + for (len = 0, i = 0; i < num; i++) + len += sg[i].length; + + return len; +} + +static void copy_sg_data(const struct scatterlist *dst, unsigned dnum, + const struct scatterlist *src, unsigned snum) +{ + unsigned len; + struct...

Hi, I made a patch against branch-1.0 for SHA256 password hashing support for Dovecot. Courier Authlib supports this hashing scheme and in order to migrate from Courier to Dovecot, I've added SHA256 support to Dovecot. The attached patch is based on BSD licensed code from Olivier Gay (http://www.ouah.org/ogay/sha2/). Changes made by me in Olivier's sha2{.h,.c} code: - Prototype for

I am currently blocking out netbios UDP port 137 on my firewall and was wondering what the following means in terms of security: Jul 9 16:19:05 oscar kernel: IP fw-in rej eth0 UDP SOMEONES_IP:137 MY_IP:137 L=78 S=0x00 I=46484 F=0x0000 T=111 I have gottena few 100 of these and was wondering if there are some vulnerabilties related to netbios out there?? What do the S/I/F/L fields stand for?? I

...while(0) > + > +static bool device_torture; > +module_param(device_torture, bool, 0644); > + > +struct torture { > + unsigned int orig_out, orig_in; > + void *orig_data; > + struct scatterlist sg[4]; > + struct scatterlist orig_sg[]; > +}; > + > +static unsigned tot_len(struct scatterlist sg[], unsigned num) > +{ > + unsigned len, i; > + > + for (len = 0, i = 0; i < num; i++) > + len += sg[i].length; > + > + return len; > +} > + > +static void copy_sg_data(const struct scatterlist *dst, unsigned dnum, > + const struct scatte...

...while(0) > + > +static bool device_torture; > +module_param(device_torture, bool, 0644); > + > +struct torture { > + unsigned int orig_out, orig_in; > + void *orig_data; > + struct scatterlist sg[4]; > + struct scatterlist orig_sg[]; > +}; > + > +static unsigned tot_len(struct scatterlist sg[], unsigned num) > +{ > + unsigned len, i; > + > + for (len = 0, i = 0; i < num; i++) > + len += sg[i].length; > + > + return len; > +} > + > +static void copy_sg_data(const struct scatterlist *dst, unsigned dnum, > + const struct scatte...

Hi, so here it is, LZ4 compression method inside btrfs. The patchset is based on top of current Chris'' for-linus + Andi''s snappy implementation + the fixes from Li Zefan. Passes xfstests and stresstests. I haven''t measured performance on wide range of hardware or workloads, rather wanted to publish the patches before I get distracted again. I''d like to ask

Thinking about Sasha's patches, we can reduce ring usage for virtio net small packets dramatically if we put virtio net header inline with the data. This can be done for free in case guest net stack allocated extra head room for the packet, and I don't see why would this have any downsides. Even though with my recent patches qemu no longer requires header to be the first s/g element, we

Thinking about Sasha's patches, we can reduce ring usage for virtio net small packets dramatically if we put virtio net header inline with the data. This can be done for free in case guest net stack allocated extra head room for the packet, and I don't see why would this have any downsides. Even though with my recent patches qemu no longer requires header to be the first s/g element, we

...er, If I execute ipconfig the second time (or more times), since my TP-LINK TL-R402M router will give an icmp(ping) packet before DHCPOFFER, the ipconfig will fail after it receive the packet and tries unpack teh packet in packet_recv() since we have a packet form checking there: if (ntohs(ip->tot_len) > ret || ip->protocol != IPPROTO_UDP) goto free_pkt; ip config will fall in a loop and always got the icmp packet instead of DHCPOFFER packet in this situation. If I change the retrun value of packet_peek and make a packet form checking in more early stage, I can avoiding ipconfig fall...

...urn false; if (keys.ip_proto != IPPROTO_TCP) return false; then check __skb_get_poff() how to get th, and check if there is some payload... > + if ((skb->protocol == htons(ETH_P_IP)) && > + hdr.ipv4->protocol == IPPROTO_TCP) { > + payload_len = ntohs(hdr.ipv4->tot_len) - hdr.ipv4->ihl * 4 - > + th->doff * 4; > + } else if ((skb->protocol == htons(ETH_P_IPV6) || > + hdr.ipv6->nexthdr == IPPROTO_TCP)) { > + payload_len = ntohs(hdr.ipv6->payload_len) - th->doff * 4; > + } else { > + return false; > + } > + &gt...

...tcp_hdr(skb); > + u16 payload_len; > + > + hdr.network = skb_network_header(skb); > + > + /* Only IPv4/IPv6 with TCP is supported */ > + if ((skb->protocol == htons(ETH_P_IP)) && > + hdr.ipv4->protocol == IPPROTO_TCP) { > + payload_len = ntohs(hdr.ipv4->tot_len) - hdr.ipv4->ihl * 4 - > + th->doff * 4; > + } else if ((skb->protocol == htons(ETH_P_IPV6) || > + hdr.ipv6->nexthdr == IPPROTO_TCP)) { > + payload_len = ntohs(hdr.ipv6->payload_len) - th->doff * 4; > + } else { > + return false; > + } > + &gt...

https://bugzilla.netfilter.org/show_bug.cgi?id=845 Summary: checking for LIBNFNETLINK... configure: error: Package requirements (libnfnetlink >= 0.0.41) were not met: Product: libnetfilter_queue Version: unspecified Platform: i386 OS/Version: RedHat Linux Status: NEW Severity: normal