- 19 Nov, 2010 3 commits
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Eric Dumazet authored
At compile time, we can replace the DIV_K instruction (divide by a constant value) by a reciprocal divide. At exec time, the expensive divide is replaced by a multiply, a less expensive operation on most processors. Signed-off-by:
Eric Dumazet <eric.dumazet@gmail.com> Acked-by:
Changli Gao <xiaosuo@gmail.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Eric Dumazet authored
Starting the translated instruction to 1 instead of 0 allows us to remove one descrement at check time and makes codes[] array init cleaner. Signed-off-by:
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Eric Dumazet authored
Remove pc variable to avoid arithmetic to compute fentry at each filter instruction. Jumps directly manipulate fentry pointer. As the last instruction of filter[] is guaranteed to be a RETURN, and all jumps are before the last instruction, we dont need to check filter bounds (number of instructions in filter array) at each iteration, so we remove it from sk_run_filter() params. On x86_32 remove f_k var introduced in commit 57fe93b3 (filter: make sure filters dont read uninitialized memory) Note : We could use a CONFIG_ARCH_HAS_{FEW|MANY}_REGISTERS in order to avoid too many ifdefs in this code. This helps compiler to use cpu registers to hold fentry and A accumulator. On x86_32, this saves 401 bytes, and more important, sk_run_filter() runs much faster because less register pressure (One less conditional branch per BPF instruction) # size net/core/filter.o net/core/filter_pre.o text data bss dec hex filename 2948 0 0 2948 b84 net/core/filter.o 3349 0 0 3349 d15 net/core/filter_pre.o on x86_64 : # size net/core/filter.o net/core/filter_pre.o text data bss dec hex filename 5173 0 0 5173 1435 net/core/filter.o 5224 0 0 5224 1468 net/core/filter_pre.o Signed-off-by:
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- 18 Nov, 2010 9 commits
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Tomoya authored
Replace bit assignment value to BIT(X). For easy to readable/identifiable, replace all bit assigned macros to BIT(X) Signed-off-by:
Tomoya MORINAGA <tomoya-linux@dsn.okisemi.com> Acked-by:
Marc Kleine-Budde <mkl@pengutronix.de> Signed-off-by:
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Tomoya authored
For easy to readable/identifiable, add prefix "PCH_" to all of #define macros. Signed-off-by:
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David S. Miller authored
GCC (rightfully) complains that: drivers/atm/fore200e.c:614:5: warning: operation on 'cmdq->head' may be undefined This is due to the FORE200E_NEXT_ENTRY macro, which essentially evaluates to: i = ++i % m Make it what's explicitly intended here which is: i = (i + 1) % m and the warning goes away. Signed-off-by: -
Eric Dumazet authored
IGMP allocates MTU sized skbs. This may fail for large MTU (order-2 allocations), so add a fallback to try lower sizes. Signed-off-by:
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Changli Gao authored
BPF_S_* are used internally, should not be exposed to the others. Signed-off-by:
Hagen Paul Pfeifer <hagen@jauu.net> Signed-off-by:
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Tetsuo Handa authored
Since repeating u16 value to u8 value conversion using switch() clause's case statement is wasteful, this patch introduces u16 to u8 mapping table and removes most of case statements. As a result, the size of net/core/filter.o is reduced by about 29% on x86. Signed-off-by:
Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Acked-by:
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John Fastabend authored
Add option to set skb priority to pktgen. Useful for testing QOS features. Also by running pktgen on the vlan device the qdisc on the real device can be tested. Signed-off-by:
John Fastabend <john.r.fastabend@intel.com> Acked-by:
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Gerrit Renker authored
This fixes whitespace noise introduced in commit "dccp ccid-2: Algorithm to update buffer state", 5753fdfe, 14 Nov 2010. Signed-off-by:
Gerrit Renker <gerrit@erg.abdn.ac.uk> Signed-off-by:
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Eric Dumazet authored
Instead of iterating in_dev->mc_list from bonding driver, its better to call a helper function provided by igmp.c Details of implementation (locking) are private to igmp code. ip_mc_rejoin_group(struct ip_mc_list *im) becomes ip_mc_rejoin_groups(struct in_device *in_dev); Signed-off-by:
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- 17 Nov, 2010 28 commits
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Vasiliy Kulikov authored
snprintf() returns number of bytes that were copied if there is no overflow. This code uses return value as number of copied bytes. Theoretically format string '%lu.%09lu %pI4:%u %pI4:%u %d %#x %#x %u %u %u %u\n' may be expanded up to 163 bytes. In reality tv.tv_sec is just few bytes instead of 20, 2 ports are just 5 bytes each instead of 10, length is 5 bytes instead of 10. The rest is an unstrusted input. Theoretically if tv_sec is big then copy_to_user() would overflow tbuf. tbuf was increased to fit in 163 bytes. snprintf() is used to follow return value semantic. Signed-off-by:
Vasiliy Kulikov <segoon@openwall.com> Signed-off-by:
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John Fastabend authored
netif_set_real_num_rx_queues() can decrement and increment the number of rx queues. For example ixgbe does this as features and offloads are toggled. Presumably this could also happen across down/up on most devices if the available resources changed (cpu offlined). The kobject needs to be zero'd in this case so that the state is not preserved across kobject_put()/kobject_init_and_add(). This resolves the following error report. ixgbe 0000:03:00.0: eth2: NIC Link is Up 10 Gbps, Flow Control: RX/TX kobject (ffff880324b83210): tried to init an initialized object, something is seriously wrong. Pid: 1972, comm: lldpad Not tainted 2.6.37-rc18021qaz+ #169 Call Trace: [<ffffffff8121c940>] kobject_init+0x3a/0x83 [<ffffffff8121cf77>] kobject_init_and_add+0x23/0x57 [<ffffffff8107b800>] ? mark_lock+0x21/0x267 [<ffffffff813c6d11>] net_rx_queue_update_kobjects+0x63/0xc6 [<ffffffff813b5e0e>] netif_set_real_num_rx_queues+0x5f/0x78 [<ffffffffa0261d49>] ixgbe_set_num_queues+0x1c6/0x1ca [ixgbe] [<ffffffffa0262509>] ixgbe_init_interrupt_scheme+0x1e/0x79c [ixgbe] [<ffffffffa0274596>] ixgbe_dcbnl_set_state+0x167/0x189 [ixgbe] Signed-off-by:
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Changli Gao authored
Use the macros defined for the members of flowi to clean the code up. Signed-off-by:
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Philippe De Muyter authored
indentation for TSI108_ETH entry was too big. Signed-off-by:
Philippe De Muyter <phdm@macqel.be> Signed-off-by:
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Joe Perches authored
Using %pR standardizes the struct resource output. Signed-off-by:
Joe Perches <joe@perches.com> Signed-off-by:
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Joe Perches authored
Signed-off-by:
Jon Mason <jon.mason@exar.com> Signed-off-by:
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Joe Perches authored
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Anirban Chakraborty authored
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Anirban Chakraborty <anirban.chakraborty@qlogic.com> Signed-off-by:
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Sony Chacko authored
Log LRO off message while disabling rx checksum only when LRO is already enabled. Signed-off-by:
Sony Chacko <sony.chacko@qlogic.com> Signed-off-by:
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Sritej Velaga authored
Add description for CN1000Q adapter Signed-off-by:
Sritej Velaga <sritej.velaga@qlogic.com> Signed-off-by:
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Rajesh Borundia authored
In case of kdump environment the function may be in unknown state. Reset the function using PCI FLR before initializing it. Signed-off-by:
Rajesh Borundia <rajesh.borundia@qlogic.com> Signed-off-by:
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Sucheta Chakraborty authored
Allow minimum bandwidth to be set zero Signed-off-by:
Sucheta Chakraborty <sucheta.chakraborty@qlogic.com> Signed-off-by:
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Thomas Graf authored
IPv6 already exposes some address family data via netlink in the IFLA_PROTINFO attribute if RTM_GETLINK request is sent with the address family set to AF_INET6. We take over this format and reuse all the code. Signed-off-by:
Thomas Graf <tgraf@infradead.org> Cc: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by:
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Thomas Graf authored
Implements the AF_INET link address family exposing the per device configuration settings via netlink using the attribute IFLA_INET_CONF. The format of IFLA_INET_CONF differs depending on the direction the attribute is sent. The attribute sent by the kernel consists of a u32 array, basically a 1:1 copy of in_device->cnf.data[]. The attribute expected by the kernel must consist of a sequence of nested u32 attributes, each representing a change request, e.g. [IFLA_INET_CONF] = { [IPV4_DEVCONF_FORWARDING] = 1, [IPV4_DEVCONF_NOXFRM] = 0, } libnl userspace API documentation and example available from: http://www.infradead.org/~tgr/libnl/doc-git/group__link__inet.htmlSigned-off-by: -
Thomas Graf authored
Define IPV4_DEVCONF_MAX to get rid of MAX - 1 notation. Signed-off-by:
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Thomas Graf authored
Each net_device contains address family specific data such as per device settings and statistics. We already expose this data via procfs/sysfs and partially netlink. The netlink method requires the requester to send one RTM_GETLINK request for each address family it wishes to receive data of and then merge this data itself. This patch implements a new API which combines all address family specific link data in a new netlink attribute IFLA_AF_SPEC. IFLA_AF_SPEC contains a sequence of nested attributes, one for each address family which in turn defines the structure of its own attribute. Example: [IFLA_AF_SPEC] = { [AF_INET] = { [IFLA_INET_CONF] = ..., }, [AF_INET6] = { [IFLA_INET6_FLAGS] = ..., [IFLA_INET6_CONF] = ..., } } The API also allows for address families to implement a function which parses the IFLA_AF_SPEC attribute sent by userspace to implement address family specific link options. Signed-off-by: -
Jeremy Eder authored
This patch helps clarify documentation for net.ipv4.igmp_max_memberships by providing a formula for calculating the maximum number of multicast groups that can be subscribed to, plus defining the theoretical limit. Signed-off-by:
Jiri Pirko <jpirko@redhat.com> Signed-off-by:
Jeremy Eder <jeder@redhat.com> Signed-off-by:
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Joe Perches authored
Add __attribute__((format... to several functins Make formats and arguments match. Signed-off-by:
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Eric Paris authored
The SELinux netfilter hooks just return NF_DROP if they drop a packet. We want to signal that a drop in this hook is a permanant fatal error and is not transient. If we do this the error will be passed back up the stack in some places and applications will get a faster interaction that something went wrong. Signed-off-by:
Eric Paris <eparis@redhat.com> Signed-off-by:
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Eric Paris authored
The current tcp_connect code completely ignores errors from sending an skb. This makes sense in many situations (like -ENOBUFFS) but I want to be able to immediately fail connections if they are denied by the SELinux netfilter hook. Netfilter does not normally return ECONNREFUSED when it drops a packet so we respect that error code as a final and fatal error that can not be recovered. Based-on-patch-by:
Patrick McHardy <kaber@trash.net> Signed-off-by:
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Eric Paris authored
SELinux would like to pass certain fatal errors back up the stack. This patch implements the generic netfilter support for this functionality. Based-on-patch-by:
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Joe Perches authored
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Joe Perches authored
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Joe Perches authored
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Joe Perches authored
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Joe Perches authored
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Joe Perches authored
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Joe Perches authored
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