10 Dec, 2014
1 commit
-
Note that the code _using_ ->msg_iter at that point will be very
unhappy with anything other than unshifted iovec-backed iov_iter.
We still need to convert users to proper primitives.Signed-off-by: Al Viro
24 Nov, 2014
1 commit
-
... and make it handle multi-segment iovecs - deals with that
"fix this later" issue for free. A bit of shame, really - it
had been there since 2.3.15pre3 when the whole thing went into the
tree, practically a historical artefact by now...Signed-off-by: Al Viro
06 Nov, 2014
1 commit
-
This encapsulates all of the skb_copy_datagram_iovec() callers
with call argument signature "skb, offset, msghdr->msg_iov, length".When we move to iov_iters in the networking, the iov_iter object will
sit in the msghdr.Having a helper like this means there will be less places to touch
during that transformation.Based upon descriptions and patch from Al Viro.
Signed-off-by: David S. Miller
08 Oct, 2014
1 commit
-
Testing xmit_more support with netperf and connected UDP sockets,
I found strange dst refcount false sharing.Current handling of IFF_XMIT_DST_RELEASE is not optimal.
Dropping dst in validate_xmit_skb() is certainly too late in case
packet was queued by cpu X but dequeued by cpu YThe logical point to take care of drop/force is in __dev_queue_xmit()
before even taking qdisc lock.As Julian Anastasov pointed out, need for skb_dst() might come from some
packet schedulers or classifiers.This patch adds new helper to cleanly express needs of various drivers
or qdiscs/classifiers.Drivers that need skb_dst() in their ndo_start_xmit() should call
following helper in their setup instead of the prior :dev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
->
netif_keep_dst(dev);Instead of using a single bit, we use two bits, one being
eventually rebuilt in bonding/team drivers.The other one, is permanent and blocks IFF_XMIT_DST_RELEASE being
rebuilt in bonding/team. Eventually, we could add something
smarter later.Signed-off-by: Eric Dumazet
Cc: Julian Anastasov
Signed-off-by: David S. Miller
11 Sep, 2014
1 commit
-
Use the more common pr_warn.
Signed-off-by: Joe Perches
Signed-off-by: David S. Miller
02 Sep, 2014
1 commit
-
For now it will always be false.
Signed-off-by: David S. Miller
25 Aug, 2014
1 commit
-
Signed-off-by: David S. Miller
22 Aug, 2014
1 commit
-
The LECS response contains the MTU that should be used. Correctly
synchronize with other layers when updating.Signed-off-by: Chas Williams - CONTRACTOR
Signed-off-by: David S. Miller
14 Aug, 2014
2 commits
-
b67bfe0d42cac56c512dd5da4b1b347a23f4b70a (hlist: drop the node
parameter from iterators) dropped the node parameter from
iterators which lec_tbl_walk() was using to iterate the list.Signed-off-by: Chas Williams
Signed-off-by: David S. Miller -
One should not call blocking primitives inside a wait loop, since both
require task_struct::state to sleep, so the inner will destroy the
outer state.sigd_enq() will possibly sleep for alloc_skb(). Move sigd_enq() before
prepare_to_wait() to avoid sleeping while waiting interruptibly. You do
not actually need to call sigd_enq() after the initial prepare_to_wait()
because we test the termination condition before calling schedule().Based on suggestions from Peter Zijlstra.
Signed-off-by: Chas Williams
Acked-by: Peter Zijlstra
Signed-off-by: David S. Miller
16 Jul, 2014
1 commit
-
Extend alloc_netdev{,_mq{,s}}() to take name_assign_type as argument, and convert
all users to pass NET_NAME_UNKNOWN.Coccinelle patch:
@@
expression sizeof_priv, name, setup, txqs, rxqs, count;
@@(
-alloc_netdev_mqs(sizeof_priv, name, setup, txqs, rxqs)
+alloc_netdev_mqs(sizeof_priv, name, NET_NAME_UNKNOWN, setup, txqs, rxqs)
|
-alloc_netdev_mq(sizeof_priv, name, setup, count)
+alloc_netdev_mq(sizeof_priv, name, NET_NAME_UNKNOWN, setup, count)
|
-alloc_netdev(sizeof_priv, name, setup)
+alloc_netdev(sizeof_priv, name, NET_NAME_UNKNOWN, setup)
)v9: move comments here from the wrong commit
Signed-off-by: Tom Gundersen
Reviewed-by: David Herrmann
Signed-off-by: David S. Miller
13 Jun, 2014
1 commit
-
Pull networking updates from David Miller:
1) Seccomp BPF filters can now be JIT'd, from Alexei Starovoitov.
2) Multiqueue support in xen-netback and xen-netfront, from Andrew J
Benniston.3) Allow tweaking of aggregation settings in cdc_ncm driver, from Bjørn
Mork.4) BPF now has a "random" opcode, from Chema Gonzalez.
5) Add more BPF documentation and improve test framework, from Daniel
Borkmann.6) Support TCP fastopen over ipv6, from Daniel Lee.
7) Add software TSO helper functions and use them to support software
TSO in mvneta and mv643xx_eth drivers. From Ezequiel Garcia.8) Support software TSO in fec driver too, from Nimrod Andy.
9) Add Broadcom SYSTEMPORT driver, from Florian Fainelli.
10) Handle broadcasts more gracefully over macvlan when there are large
numbers of interfaces configured, from Herbert Xu.11) Allow more control over fwmark used for non-socket based responses,
from Lorenzo Colitti.12) Do TCP congestion window limiting based upon measurements, from Neal
Cardwell.13) Support busy polling in SCTP, from Neal Horman.
14) Allow RSS key to be configured via ethtool, from Venkata Duvvuru.
15) Bridge promisc mode handling improvements from Vlad Yasevich.
16) Don't use inetpeer entries to implement ID generation any more, it
performs poorly, from Eric Dumazet.* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1522 commits)
rtnetlink: fix userspace API breakage for iproute2 < v3.9.0
tcp: fixing TLP's FIN recovery
net: fec: Add software TSO support
net: fec: Add Scatter/gather support
net: fec: Increase buffer descriptor entry number
net: fec: Factorize feature setting
net: fec: Enable IP header hardware checksum
net: fec: Factorize the .xmit transmit function
bridge: fix compile error when compiling without IPv6 support
bridge: fix smatch warning / potential null pointer dereference
via-rhine: fix full-duplex with autoneg disable
bnx2x: Enlarge the dorq threshold for VFs
bnx2x: Check for UNDI in uncommon branch
bnx2x: Fix 1G-baseT link
bnx2x: Fix link for KR with swapped polarity lane
sctp: Fix sk_ack_backlog wrap-around problem
net/core: Add VF link state control policy
net/fsl: xgmac_mdio is dependent on OF_MDIO
net/fsl: Make xgmac_mdio read error message useful
net_sched: drr: warn when qdisc is not work conserving
...
31 May, 2014
1 commit
-
This preprocessor check is commented out ever since this file was added
during the v2.3 development cycle. It is unclear what it purpose might
have been. Whatever it was, it can safely be removed now.Signed-off-by: Paul Bolle
Signed-off-by: David S. Miller
18 Apr, 2014
1 commit
-
Mostly scripted conversion of the smp_mb__* barriers.
Signed-off-by: Peter Zijlstra
Acked-by: Paul E. McKenney
Link: http://lkml.kernel.org/n/tip-55dhyhocezdw1dg7u19hmh1u@git.kernel.org
Cc: Linus Torvalds
Cc: linux-arch@vger.kernel.org
Signed-off-by: Ingo Molnar
12 Apr, 2014
1 commit
-
Several spots in the kernel perform a sequence like:
skb_queue_tail(&sk->s_receive_queue, skb);
sk->sk_data_ready(sk, skb->len);But at the moment we place the SKB onto the socket receive queue it
can be consumed and freed up. So this skb->len access is potentially
to freed up memory.Furthermore, the skb->len can be modified by the consumer so it is
possible that the value isn't accurate.And finally, no actual implementation of this callback actually uses
the length argument. And since nobody actually cared about it's
value, lots of call sites pass arbitrary values in such as '0' and
even '1'.So just remove the length argument from the callback, that way there
is no confusion whatsoever and all of these use-after-free cases get
fixed as a side effect.Based upon a patch by Eric Dumazet and his suggestion to audit this
issue tree-wide.Signed-off-by: David S. Miller
28 Mar, 2014
1 commit
-
Use del_timer_sync to ensure that the timer is stopped on all CPUs before
the driver exists.This change was suggested by Thomas Gleixner.
The semantic patch that makes this change is as follows:
(http://coccinelle.lip6.fr/)//
@r@
declarer name module_exit;
identifier ex;
@@module_exit(ex);
@@
identifier r.ex;
@@ex(...) {
}
//Signed-off-by: Julia Lawall
Signed-off-by: David S. Miller
22 Jan, 2014
2 commits
-
net/appletalk/aarp.c: In function ‘__aarp_send_query’:
net/appletalk/aarp.c:137:2: error: implicit declaration of function ‘ether_addr_copy’ [-Werror=implicit-function-declaration]
...
net/atm/lec.c: In function ‘send_to_lecd’:
net/atm/lec.c:524:3: warning: passing argument 1 of ‘ether_addr_copy’ from incompatible pointer type [enabled by default]
In file included from net/atm/lec.c:17:0:
include/linux/etherdevice.h:227:20: note: expected ‘u8 *’ but argument is of type ‘unsigned char (*)[6]’
...
net/caif/caif_usb.c: In function ‘cfusbl_create’:
net/caif/caif_usb.c:108:2: error: implicit declaration of function ‘ether_addr_copy’ [-Werror=implicit-function-declaration]Signed-off-by: David S. Miller
-
Use ether_addr_copy instead of memcpy(a, b, ETH_ALEN) to
save some cycles on arm and powerpc.Signed-off-by: Joe Perches
Signed-off-by: David S. Miller
21 Nov, 2013
1 commit
-
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
set msg_namelen to the proper size
Suggested-by: Eric Dumazet
Signed-off-by: Hannes Frederic Sowa
Signed-off-by: David S. Miller
29 May, 2013
2 commits
-
commit 351638e7deeed2ec8ce451b53d3 (net: pass info struct via netdevice notifier)
breaks booting of my KVM guest, this is due to we still forget to pass
struct netdev_notifier_info in several places. This patch completes it.Cc: Jiri Pirko
Cc: David S. Miller
Signed-off-by: Cong Wang
Signed-off-by: David S. Miller -
So far, only net_device * could be passed along with netdevice notifier
event. This patch provides a possibility to pass custom structure
able to provide info that event listener needs to know.Signed-off-by: Jiri Pirko
v2->v3: fix typo on simeth
shortened dev_getter
shortened notifier_info struct name
v1->v2: fix notifier_call parameter in call_netdevice_notifier()
Signed-off-by: David S. Miller
02 May, 2013
1 commit
-
Pull VFS updates from Al Viro,
Misc cleanups all over the place, mainly wrt /proc interfaces (switch
create_proc_entry to proc_create(), get rid of the deprecated
create_proc_read_entry() in favor of using proc_create_data() and
seq_file etc).7kloc removed.
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (204 commits)
don't bother with deferred freeing of fdtables
proc: Move non-public stuff from linux/proc_fs.h to fs/proc/internal.h
proc: Make the PROC_I() and PDE() macros internal to procfs
proc: Supply a function to remove a proc entry by PDE
take cgroup_open() and cpuset_open() to fs/proc/base.c
ppc: Clean up scanlog
ppc: Clean up rtas_flash driver somewhat
hostap: proc: Use remove_proc_subtree()
drm: proc: Use remove_proc_subtree()
drm: proc: Use minor->index to label things, not PDE->name
drm: Constify drm_proc_list[]
zoran: Don't print proc_dir_entry data in debug
reiserfs: Don't access the proc_dir_entry in r_open(), r_start() r_show()
proc: Supply an accessor for getting the data from a PDE's parent
airo: Use remove_proc_subtree()
rtl8192u: Don't need to save device proc dir PDE
rtl8187se: Use a dir under /proc/net/r8180/
proc: Add proc_mkdir_data()
proc: Move some bits from linux/proc_fs.h to linux/{of.h,signal.h,tty.h}
proc: Move PDE_NET() to fs/proc/proc_net.c
...
10 Apr, 2013
1 commit
-
The only part of proc_dir_entry the code outside of fs/proc
really cares about is PDE(inode)->data. Provide a helper
for that; static inline for now, eventually will be moved
to fs/proc, along with the knowledge of struct proc_dir_entry
layout.Signed-off-by: Al Viro
08 Apr, 2013
2 commits
-
Conflicts:
drivers/nfc/microread/mei.c
net/netfilter/nfnetlink_queue_core.cPull in 'net' to get Eric Biederman's AF_UNIX fix, upon which
some cleanups are going to go on-top.Signed-off-by: David S. Miller
-
The current code does not fill the msg_name member in case it is set.
It also does not set the msg_namelen member to 0 and therefore makes
net/socket.c leak the local, uninitialized sockaddr_storage variable
to userland -- 128 bytes of kernel stack memory.Fix that by simply setting msg_namelen to 0 as obviously nobody cared
about vcc_recvmsg() not filling the msg_name in case it was set.Signed-off-by: Mathias Krause
Signed-off-by: David S. Miller
28 Mar, 2013
1 commit
-
Add a new constant ETH_P_802_3_MIN, the minimum ethernet type for
an 802.3 frame. Frames with a lower value in the ethernet type field
are Ethernet II.Also update all the users of this value that David Miller and
I could find to use the new constant.Also correct a bug in util.c. The comparison with ETH_P_802_3_MIN
should be >= not >.As suggested by Jesse Gross.
Compile tested only.
Cc: David Miller
Cc: Jesse Gross
Cc: Karsten Keil
Cc: John W. Linville
Cc: Johannes Berg
Cc: Bart De Schuymer
Cc: Stephen Hemminger
Cc: Patrick McHardy
Cc: Marcel Holtmann
Cc: Gustavo Padovan
Cc: Johan Hedberg
Cc: linux-bluetooth@vger.kernel.org
Cc: netfilter-devel@vger.kernel.org
Cc: bridge@lists.linux-foundation.org
Cc: linux-wireless@vger.kernel.org
Cc: linux1394-devel@lists.sourceforge.net
Cc: linux-media@vger.kernel.org
Cc: netdev@vger.kernel.org
Cc: dev@openvswitch.org
Acked-by: Mauro Carvalho Chehab
Acked-by: Stefan Richter
Signed-off-by: Simon Horman
Signed-off-by: David S. Miller
28 Feb, 2013
1 commit
-
I'm not sure why, but the hlist for each entry iterators were conceived
list_for_each_entry(pos, head, member)
The hlist ones were greedy and wanted an extra parameter:
hlist_for_each_entry(tpos, pos, head, member)
Why did they need an extra pos parameter? I'm not quite sure. Not only
they don't really need it, it also prevents the iterator from looking
exactly like the list iterator, which is unfortunate.Besides the semantic patch, there was some manual work required:
- Fix up the actual hlist iterators in linux/list.h
- Fix up the declaration of other iterators based on the hlist ones.
- A very small amount of places were using the 'node' parameter, this
was modified to use 'obj->member' instead.
- Coccinelle didn't handle the hlist_for_each_entry_safe iterator
properly, so those had to be fixed up manually.The semantic patch which is mostly the work of Peter Senna Tschudin is here:
@@
iterator name hlist_for_each_entry, hlist_for_each_entry_continue, hlist_for_each_entry_from, hlist_for_each_entry_rcu, hlist_for_each_entry_rcu_bh, hlist_for_each_entry_continue_rcu_bh, for_each_busy_worker, ax25_uid_for_each, ax25_for_each, inet_bind_bucket_for_each, sctp_for_each_hentry, sk_for_each, sk_for_each_rcu, sk_for_each_from, sk_for_each_safe, sk_for_each_bound, hlist_for_each_entry_safe, hlist_for_each_entry_continue_rcu, nr_neigh_for_each, nr_neigh_for_each_safe, nr_node_for_each, nr_node_for_each_safe, for_each_gfn_indirect_valid_sp, for_each_gfn_sp, for_each_host;type T;
expression a,c,d,e;
identifier b;
statement S;
@@-T b;
[akpm@linux-foundation.org: drop bogus change from net/ipv4/raw.c]
[akpm@linux-foundation.org: drop bogus hunk from net/ipv6/raw.c]
[akpm@linux-foundation.org: checkpatch fixes]
[akpm@linux-foundation.org: fix warnings]
[akpm@linux-foudnation.org: redo intrusive kvm changes]
Tested-by: Peter Senna Tschudin
Acked-by: Paul E. McKenney
Signed-off-by: Sasha Levin
Cc: Wu Fengguang
Cc: Marcelo Tosatti
Cc: Gleb Natapov
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
27 Feb, 2013
1 commit
-
Pull vfs pile (part one) from Al Viro:
"Assorted stuff - cleaning namei.c up a bit, fixing ->d_name/->d_parent
locking violations, etc.The most visible changes here are death of FS_REVAL_DOT (replaced with
"has ->d_weak_revalidate()") and a new helper getting from struct file
to inode. Some bits of preparation to xattr method interface changes.Misc patches by various people sent this cycle *and* ocfs2 fixes from
several cycles ago that should've been upstream right then.PS: the next vfs pile will be xattr stuff."
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (46 commits)
saner proc_get_inode() calling conventions
proc: avoid extra pde_put() in proc_fill_super()
fs: change return values from -EACCES to -EPERM
fs/exec.c: make bprm_mm_init() static
ocfs2/dlm: use GFP_ATOMIC inside a spin_lock
ocfs2: fix possible use-after-free with AIO
ocfs2: Fix oops in ocfs2_fast_symlink_readpage() code path
get_empty_filp()/alloc_file() leave both ->f_pos and ->f_version zero
target: writev() on single-element vector is pointless
export kernel_write(), convert open-coded instances
fs: encode_fh: return FILEID_INVALID if invalid fid_type
kill f_vfsmnt
vfs: kill FS_REVAL_DOT by adding a d_weak_revalidate dentry op
nfsd: handle vfs_getattr errors in acl protocol
switch vfs_getattr() to struct path
default SET_PERSONALITY() in linux/elf.h
ceph: prepopulate inodes only when request is aborted
d_hash_and_lookup(): export, switch open-coded instances
9p: switch v9fs_set_create_acl() to inode+fid, do it before d_instantiate()
9p: split dropping the acls from v9fs_set_create_acl()
...
23 Feb, 2013
1 commit
-
Signed-off-by: Al Viro
19 Feb, 2013
1 commit
-
proc_net_remove is only used to remove proc entries
that under /proc/net,it's not a general function for
removing proc entries of netns. if we want to remove
some proc entries which under /proc/net/stat/, we still
need to call remove_proc_entry.this patch use remove_proc_entry to replace proc_net_remove.
we can remove proc_net_remove after this patch.Signed-off-by: Gao feng
Signed-off-by: David S. Miller
18 Dec, 2012
1 commit
-
As reported by Chen Gang , we should ensure there
is enough space when formatting the sysfs buffers.Signed-off-by: Chas Williams
Signed-off-by: David S. Miller
02 Dec, 2012
6 commits
-
We don't need to schedule the wakeup tasklet on *every* unlock; only if we
actually blocked the channel in the first place.Signed-off-by: David Woodhouse
Acked-by: Krzysztof Mazur -
The br2684 does not check if used vcc is in connected state,
causing potential Oops in pppoatm_send() when vcc->send() is called
on not fully connected socket.Now br2684 can be assigned only on connected sockets; otherwise
-EINVAL error is returned.Signed-off-by: Krzysztof Mazur
Signed-off-by: David Woodhouse -
The br2684 code used module_put() during unassignment from vcc with
hope that we have BKL. This assumption is no longer true.Now owner field in atmvcc is used to move this module_put()
to vcc_destroy_socket().Signed-off-by: David Woodhouse
Acked-by: Krzysztof Mazur -
Now that we can return zero from pppoatm_send() for reasons *other* than
the queue being full, that means we can't depend on a subsequent call to
pppoatm_pop() waking the queue, and we might leave it stalled
indefinitely.Use the ->release_cb() callback to wake the queue after the sock is
unlocked.Signed-off-by: David Woodhouse
Acked-by: Krzysztof Mazur -
Avoid submitting packets to a vcc which is being closed. Things go badly
wrong when the ->pop method gets later called after everything's been
torn down.Use the ATM socket lock for synchronisation with vcc_destroy_socket(),
which clears the ATM_VF_READY bit under the same lock. Otherwise, we
could end up submitting a packet to the device driver even after its
->ops->close method has been called. And it could call the vcc's ->pop
method after the protocol has been shut down. Which leads to a panic.Signed-off-by: David Woodhouse
Acked-by: Krzysztof Mazur -
The immediate use case for this is that it will allow us to ensure that a
pppoatm queue is woken after it has to drop a packet due to the sock being
locked.Note that 'release_cb' is called when the socket is *unlocked*. This is
not to be confused with vcc_release() — which probably ought to be called
vcc_close().Signed-off-by: David Woodhouse
Acked-by: Krzysztof Mazur
30 Nov, 2012
2 commits
-
The pppoatm_may_send() is quite heavy and it's called three times
in pppoatm_send() and inlining costs more than 200 bytes of code
(more than 10% of total pppoatm driver code size).add/remove: 1/0 grow/shrink: 0/1 up/down: 132/-367 (-235)
function old new delta
pppoatm_may_send - 132 +132
pppoatm_send 900 533 -367Signed-off-by: Krzysztof Mazur
Signed-off-by: David Woodhouse -
The vcc_destroy_socket() closes vcc before the protocol is detached
from vcc by calling vcc->push() with NULL skb. This leaves some time
window, where the protocol may call vcc->send() on closed vcc
and crash.Now pppoatm_send(), like vcc_sendmsg(), checks for vcc flags that
indicate that vcc is not ready. If the vcc is not ready we just
drop frame. Queueing frames is much more complicated because we
don't have callbacks that inform us about vcc flags changes.Signed-off-by: Krzysztof Mazur
Signed-off-by: David Woodhouse
28 Nov, 2012
1 commit
-
The pppoatm_send() does not take any lock that will prevent concurrent
vcc_sendmsg(). This causes two problems:- there is no locking between checking the send queue size
with atm_may_send() and incrementing sk_wmem_alloc,
and the real queue size can be a little higher than sk_sndbuf- the vcc->sendmsg() can be called concurrently. I'm not sure
if it's allowed. Some drivers (eni, nicstar, ...) seem
to assume it will never happen.Now pppoatm_send() takes ATM socket lock, the same that is used
in vcc_sendmsg() and other ATM socket functions. The pppoatm_send()
is called with BH disabled, so bh_lock_sock() is used instead
of lock_sock().Signed-off-by: Krzysztof Mazur
Cc: Chas Williams - CONTRACTOR
Signed-off-by: David Woodhouse