- Dec 09, 2014
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Eli Cohen authored
1. Add required __acquire/__release statements to balance spinlock usage. 2. Change the index parameter of begin_wqe() to be unsigned to match supplied argument type. Signed-off-by:
Eli Cohen <eli@mellanox.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Eli Cohen authored
Add ConnectX-4LX to the list of supported devices as well as their virtual functions. Signed-off-by:
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Majd Dibbiny authored
The outbox should be cleared before executing the command. Signed-off-by:
Majd Dibbiny <majd@mellanox.com> Signed-off-by:
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Eli Cohen authored
Useful for debugging purposes. Signed-off-by:
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Eli Cohen authored
These enumerations are not used so remove them. Signed-off-by:
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Eli Cohen authored
Command queue descriptor page size is 4KB and not the page size used by the kernel. Signed-off-by:
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Eli Cohen authored
mlx5 requires at least one interrupt vector for completions so fix the minvec argument to pci_enable_msix_range() accordingly. Signed-off-by:
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Eli Cohen authored
Call request module on mlx5_ib so it will be available for applications requiring it, such as installers that require boot over IB. Signed-off-by:
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David S. Miller authored
Chunhao Lin says: ==================== r8169:change hardware setting This patch series contains two hardware setting modification to prevent hardware become abnormal. ==================== Signed-off-by: -
Chun-Hao Lin authored
Cmac engine is the bridge between driver and dash firmware. Other os may not disable cmac when leave. And r8169 did not allocate any resources for cmac engine. Disable it to prevent abnormal system behavior. Signed-off-by:
Chunhao Lin <hau@realtek.com> Signed-off-by:
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Chun-Hao Lin authored
For RTL8168G/GU/H/EP and RTL8411B remove enable tx/rx from its own hw_start function. This will prevent enable tx/rx before complete hardware tx/rx setting. Tx/Rx will be enabled in the end of function rtl_hw_start_8168. Signed-off-by:
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David S. Miller authored
Ying Xue says: ==================== tipc: convert name table read-write lock to RCU Now TIPC name table is statically allocated and is protected with a Read-Write lock. To enhance the performance of TIPC name table lookup, we are going to involve RCU lock to protect the name table. As a consequence, it becomes lockless to concurrently look up name table on read side. However, before the conversion can be successfully made, the following two things must be first done: - change allocation way of name table from static to dynamic - fix several incorrect locking policy issues ==================== Signed-off-by: -
Ying Xue authored
Convert tipc name table read-write lock to RCU. After this change, a new spin lock is used to protect name table on write side while RCU is applied on read side. Signed-off-by:
Ying Xue <ying.xue@windriver.com> Reviewed-by:
Erik Hugne <erik.hugne@ericsson.com> Reviewed-by:
Jon Maloy <jon.maloy@ericsson.com> Tested-by:
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Ying Xue authored
When a list_head variable is seen as a new entry to be added to a list head, it's unnecessary to be initialized with INIT_LIST_HEAD(). Signed-off-by:
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Ying Xue authored
When tipc name sequence is published, name table lock is released before name sequence buffer is delivered to remote nodes through its underlying unicast links. However, when name sequence is withdrawn, the name table lock is held until the transmission of the removal message of name sequence is finished. During the process, node lock is nested in name table lock. To prevent node lock from being nested in name table lock, while withdrawing name, we should adopt the same locking policy of publishing name sequence: name table lock should be released before message is sent. Signed-off-by:
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Ying Xue authored
As tipc_nametbl_lock is used to protect name_table structure, the lock must be held while all members of name_table structure are accessed. However, the lock is not obtained while a member of name_table structure - local_publ_count is read in tipc_nametbl_publish(), as a consequence, an inconsistent value of local_publ_count might be got. Signed-off-by:
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Ying Xue authored
TIPC internally created a name table which is used to store name sequences. Now there is a read-write lock - tipc_nametbl_lock to protect the table, and each name sequence saved in the table is protected with its private lock. When a name sequence is inserted or removed to or from the table, its members might need to change. Therefore, in normal case, the two locks must be held while TIPC operates the table. However, there are still several places where we only hold tipc_nametbl_lock without proprerly obtaining name sequence lock, which might cause the corruption of name sequence. Signed-off-by:
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Ying Xue authored
As TIPC subscriber server is terminated before name table, no user depends on subscription list of name sequence when name table is stopped. Therefore, all name sequences stored in name table should be released whatever their subscriptions lists are empty or not, otherwise, memory leak might happen. Signed-off-by:
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Ying Xue authored
Name table locking policy is going to be adjusted from read-write lock protection to RCU lock protection in the future commits. But its essential precondition is to convert the allocation way of name table from static to dynamic mode. Signed-off-by:
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Ying Xue authored
The size variable is introduced in publ_list struct to help us exactly calculate SKB buffer sizes needed by publications when all publications in name table are delivered in bulk in named_distribute(). But if publication SKB buffer size is assumed to MTU, the size variable in publ_list struct can be completely eliminated at the cost of wasting a bit memory space for last SKB. Signed-off-by:
Tero Aho <tero.aho@coriant.com> Reviewed-by:
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Joe Perches authored
The compute_score functions are a bit difficult to read. Neaten them a bit to reduce object sizes and make them a bit more intelligible. Return early to avoid indentation and avoid unnecessary initializations. (allyesconfig, but w/ -O2 and no profiling) $ size net/ipv[46]/udp.o.* text data bss dec hex filename 28680 1184 25 29889 74c1 net/ipv4/udp.o.new 28756 1184 25 29965 750d net/ipv4/udp.o.old 17600 1010 2 18612 48b4 net/ipv6/udp.o.new 17632 1010 2 18644 48d4 net/ipv6/udp.o.old Signed-off-by:
Joe Perches <joe@perches.com> Acked-by:
Eric Dumazet <edumazet@google.com> Signed-off-by:
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Petri Gynther authored
Modify bcmgenet driver so that it can be used on Broadcom 7xxx MIPS-based STB platforms without a device tree. Signed-off-by:
Petri Gynther <pgynther@google.com> Acked-by:
Florian Fainelli <f.fainelli@gmail.com> Signed-off-by:
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Haiyang Zhang authored
This patch adds proper handling of the vNIC hot removal event, which includes a rescind-channel-offer message from the host side that triggers vNIC close and removal. In this case, the notices to the host during close and removal is not necessary because the channel is rescinded. This patch blocks these unnecessary messages, and lets vNIC removal process complete normally. Signed-off-by:
Haiyang Zhang <haiyangz@microsoft.com> Reviewed-by:
K. Y. Srinivasan <kys@microsoft.com> Signed-off-by:
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Denis Kirjanov authored
Expand DIV_KX to use BPF_MOD operation in the DIV_KX bpf 'classic' test. CC: Alexei Starovoitov <ast@plumgrid.com> Signed-off-by:
Denis Kirjanov <kda@linux-powerpc.org> Signed-off-by:
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David S. Miller authored
Willem de Bruijn says: ==================== timestamping updates The main goal for this patchset is to allow correlating timestamps with the egress interface. Also introduce a warning, as discussed previously, and update the tests to verify the new feature. ==================== Signed-off-by: -
Willem de Bruijn authored
Documentation: expand explanation of timestamp counter Test: new: flag -I requests and prints PKTINFO new: flag -x prints payload (possibly truncated) fix: remove pretty print that breaks common flag '-l 1' Signed-off-by:
Willem de Bruijn <willemb@google.com> Signed-off-by:
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Willem de Bruijn authored
Allow reading of timestamps and cmsg at the same time on all relevant socket families. One use is to correlate timestamps with egress device, by asking for cmsg IP_PKTINFO. on AF_INET sockets, call the relevant function (ip_cmsg_recv). To avoid changing legacy expectations, only do so if the caller sets a new timestamping flag SOF_TIMESTAMPING_OPT_CMSG. on AF_INET6 sockets, IPV6_PKTINFO and all other recv cmsg are already returned for all origins. only change is to set ifindex, which is not initialized for all error origins. In both cases, only generate the pktinfo message if an ifindex is known. This is not the case for ACK timestamps. The difference between the protocol families is probably a historical accident as a result of the different conditions for generating cmsg in the relevant ip(v6)_recv_error function: ipv4: if (serr->ee.ee_origin == SO_EE_ORIGIN_ICMP) { ipv6: if (serr->ee.ee_origin != SO_EE_ORIGIN_LOCAL) { At one time, this was the same test bar for the ICMP/ICMP6 distinction. This is no longer true. Signed-off-by: -
Willem de Bruijn authored
One line change, in response to catching an occurrence of this bug. See also fix f4713a3d ("net-timestamp: make tcp_recvmsg call ...") Signed-off-by:
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- Dec 06, 2014
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David S. Miller authored
Alexei Starovoitov says: ==================== allow eBPF programs to be attached to sockets V1->V2: fixed comments in sample code to state clearly that packet data is accessed with LD_ABS instructions and not internal skb fields. Also replaced constants in: BPF_LD_ABS(BPF_B, 14 + 9 /* R0 = ip->proto */), with: BPF_LD_ABS(BPF_B, ETH_HLEN + offsetof(struct iphdr, protocol) /* R0 = ip->proto */), V1 cover: Introduce BPF_PROG_TYPE_SOCKET_FILTER type of eBPF programs that can be attached to sockets with setsockopt(). Allow such programs to access maps via lookup/update/delete helpers. This feature was previewed by bpf manpage in commit b4fc1a46("Merge branch 'bpf-next'") Now it can actually run. 1st patch adds LD_ABS/LD_IND instruction verification and 2nd patch adds new setsockopt() flag. Patches 3-6 are examples in assembler and in C. Though native eBPF programs are way more powerful than classic filters (attachable through similar setsockopt() call), they don't have skb field accessors yet. Like skb->pkt_type, skb->dev->ifindex are not accessible. There are sevaral ways to achieve that. That will be in the next set of patches. So in this set native eBPF programs can only read data from packet and access maps. The most powerful example is sockex2_kern.c from patch 6 where ~200 lines of C are compiled into ~300 of eBPF instructions. It shows how quite complex packet parsing can be done. LLVM used to build examples is at https://github.com/iovisor/llvm which is fork of llvm trunk that I'm cleaning up for upstreaming. ==================== Signed-off-by:
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Alexei Starovoitov authored
sockex2_kern.c is purposefully large eBPF program in C. llvm compiles ~200 lines of C code into ~300 eBPF instructions. It's similar to __skb_flow_dissect() to demonstrate that complex packet parsing can be done by eBPF. Then it uses (struct flow_keys)->dst IP address (or hash of ipv6 dst) to keep stats of number of packets per IP. User space loads eBPF program, attaches it to loopback interface and prints dest_ip->#packets stats every second. Usage: $sudo samples/bpf/sockex2 ip 127.0.0.1 count 19 ip 127.0.0.1 count 178115 ip 127.0.0.1 count 369437 ip 127.0.0.1 count 559841 ip 127.0.0.1 count 750539 Signed-off-by:
Alexei Starovoitov <ast@plumgrid.com> Signed-off-by:
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Alexei Starovoitov authored
this example does the same task as previous socket example in assembler, but this one does it in C. eBPF program in kernel does: /* assume that packet is IPv4, load one byte of IP->proto */ int index = load_byte(skb, ETH_HLEN + offsetof(struct iphdr, protocol)); long *value; value = bpf_map_lookup_elem(&my_map, &index); if (value) __sync_fetch_and_add(value, 1); Corresponding user space reads map[tcp], map[udp], map[icmp] and prints protocol stats every second Signed-off-by: -
Alexei Starovoitov authored
simple .o parser and loader using BPF syscall. .o is a standard ELF generated by LLVM backend It parses elf file compiled by llvm .c->.o - parses 'maps' section and creates maps via BPF syscall - parses 'license' section and passes it to syscall - parses elf relocations for BPF maps and adjusts BPF_LD_IMM64 insns by storing map_fd into insn->imm and marking such insns as BPF_PSEUDO_MAP_FD - loads eBPF programs via BPF syscall One ELF file can contain multiple BPF programs. int load_bpf_file(char *path); populates prog_fd[] and map_fd[] with FDs received from bpf syscall bpf_helpers.h - helper functions available to eBPF programs written in C Signed-off-by:
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Alexei Starovoitov authored
this socket filter example does: - creates arraymap in kernel with key 4 bytes and value 8 bytes - loads eBPF program which assumes that packet is IPv4 and loads one byte of IP->proto from the packet and uses it as a key in a map r0 = skb->data[ETH_HLEN + offsetof(struct iphdr, protocol)]; *(u32*)(fp - 4) = r0; value = bpf_map_lookup_elem(map_fd, fp - 4); if (value) (*(u64*)value) += 1; - attaches this program to raw socket - every second user space reads map[IPPROTO_TCP], map[IPPROTO_UDP], map[IPPROTO_ICMP] to see how many packets of given protocol were seen on loopback interface Usage: $sudo samples/bpf/sock_example TCP 0 UDP 0 ICMP 0 packets TCP 187600 UDP 0 ICMP 4 packets TCP 376504 UDP 0 ICMP 8 packets TCP 563116 UDP 0 ICMP 12 packets TCP 753144 UDP 0 ICMP 16 packets Signed-off-by: -
Alexei Starovoitov authored
introduce new setsockopt() command: setsockopt(sock, SOL_SOCKET, SO_ATTACH_BPF, &prog_fd, sizeof(prog_fd)) where prog_fd was received from syscall bpf(BPF_PROG_LOAD, attr, ...) and attr->prog_type == BPF_PROG_TYPE_SOCKET_FILTER setsockopt() calls bpf_prog_get() which increments refcnt of the program, so it doesn't get unloaded while socket is using the program. The same eBPF program can be attached to multiple sockets. User task exit automatically closes socket which calls sk_filter_uncharge() which decrements refcnt of eBPF program Signed-off-by:
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Alexei Starovoitov authored
introduce program type BPF_PROG_TYPE_SOCKET_FILTER that is used for attaching programs to sockets where ctx == skb. add verifier checks for ABS/IND instructions which can only be seen in socket filters, therefore the check: if (env->prog->aux->prog_type != BPF_PROG_TYPE_SOCKET_FILTER) verbose("BPF_LD_ABS|IND instructions are only allowed in socket filters\n"); Signed-off-by: -
Jason Wang authored
To be more friendly with drop monitor, we should only call kfree_skb() when the packets were dropped and use consume_skb() in other cases. Cc: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by:
Jason Wang <jasowang@redhat.com> Acked-by:
Michael S. Tsirkin <mst@redhat.com> Signed-off-by:
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Markus Elfring authored
The pci_dev_put() function tests whether its argument is NULL and then returns immediately. Thus the test around the call is not needed. This issue was detected by using the Coccinelle software. Signed-off-by:
Markus Elfring <elfring@users.sourceforge.net> Acked-by:
Olof Johansson <olof@lixom.net> Acked-by:
Luis R. Rodriguez <mcgrof@suse.com> Signed-off-by:
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Markus Elfring authored
The free_percpu() function tests whether its argument is NULL and then returns immediately. Thus the test around the call is not needed. This issue was detected by using the Coccinelle software. Signed-off-by:
Mahesh Bandewar <maheshb@google.com> Signed-off-by:
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Markus Elfring authored
The vfree() function performs also input parameter validation. Thus the test around the call is not needed. This issue was detected by using the Coccinelle software. Signed-off-by:
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Andy Shevchenko authored
Instead of using global variables we are going to use dynamically allocated memory. It allows to append a support of more than one ethernet adapter which might have different settings simultaniously. Signed-off-by:
Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by:
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