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git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs
* 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs: (26 commits)
9p: add more conservative locking
9p: fix oops in protocol stat parsing error path.
9p: fix device file handling
9p: Improve debug support
9p: eliminate depricated conv functions
9p: rework client code to use new protocol support functions
9p: remove unnecessary tag field from p9_req_t structure
9p: remove 9p fcall debug prints
9p: add new protocol support code
9p: encapsulate version function
9p: move dirread to fs layer
9p: adjust 9p vfs write operation
9p: move readn meta-function from client to fs layer
9p: consolidate read/write functions
9p: drop broken unused error path from p9_conn_create()
9p: make rpc code common and rework flush code
9p: use the rcall structure passed in the request in trans_fd read_work
9p: apply common request code to trans_fd
9p: apply common tagpool handling to trans_fd
9p: move request management to client code
...
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During the reorganization some of the multi-theaded locking assumptions were
accidently relaxed. This patch moves us back towards a more conservative
locking strategy.
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
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When we get an error on parsing a stat due to a protocol bug,
we can generate an oops during cleanup because we didn't
initialize the string pointers in the stat structure.
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
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The new debug support lacks some of the information that the previous fcprint
code provided -- this patch focuses on better presentation of debug data along
with more helpful debug along error paths.
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
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Remove depricated conv functions which have been replaced with new
protocol routines.
This patch also reworks the one instance of the file-system code which
directly calls conversion routines (to accomplish unpacking dirreads).
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
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Now that the new protocol functions are in place, this patch switches
the client code to using the new support code.
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
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This removes the vestigial tag field from the p9_req_t structure.
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
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One of the current debug options allows users to get a verbose dump of fcalls.
This isn't really necessary as correctly parsed protocol frames can be printed
as part of the code in the client functions. The consolidated printfcalls
structure would require new entries to be added for every extension. This
patch removes the debug print methods and their use.
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
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This adds a new protocol processing support code based on Anthony Liguori's
9p library code. This code performs protocol marshalling/unmarshalling using
printf like strings to represent protocol elements. It is my intent to use
them to replace the current functions in conv.c as well as the
p9_create_* functions.
This should make the client implementation much more clear, and also make it
much easier to add new protocol extensions by limiting the number of places
in which changes need to be made.
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
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Alsmot all 9P client wire functions have their own (set of) functions.
Tversion is an exception as its encapsulated into the client_create code.
This patch moves the protocol specifics of this to a function to match the
rest of the code.
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
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Currently reading a directory is implemented in the client code.
This function is not actually a wire operation, but a meta operation
which calls read operations and processes the results.
This patch moves this functionality to the fs layer and calls component
wire operations instead of constructing their packets. This provides a
cleaner separation and will help when we reorganize the client functions
and protocol processing methods.
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
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There are a couple of methods in the client code which aren't actually
wire operations. To keep things organized cleaner, these operations are
being moved to the fs layer.
This patch moves the readn meta-function (which executes multiple wire
reads until a buffer is full) to the fs layer.
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
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Currently there are two separate versions of read and write. One for
dealing with user buffers and the other for dealing with kernel buffers.
There is a tremendous amount of code duplication in the otherwise
identical versions of these functions. This patch adds an additional
user buffer parameter to read and write and conditionalizes handling of
the buffer on whether the kernel buffer or the user buffer is populated.
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
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Post p9_fd_poll() error path which checks m->poll_waddr[i] for PTR_ERR
value has the following problems.
* It's completely unused. Error value is set iff NULL @wait_address
has been specified to p9_pollwait() which is guaranteed not to
happen.
* It dereferences @m after deallocating it (introduced by 571ffeaf and
spotted by Raja R Harinath.
* It returned the wrong value on error. It should return
poll_waddr[i] but it returnes poll_waddr (introduced by 571ffeaf).
* p9_mux_poll_stop() doesn't handle PTR_ERR value. It will try to
operate on the PTR_ERR value as if it's a normal pointer and cause
oops.
As the error path is bogus in the first place, there's no reason to
hold onto it. Kill it.
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
Cc: Raja R Harinath <harinath@hurrynot.org>
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This code moves the rpc function to the common client base,
reorganizes the flush code to be more simple and stable, and
makes the necessary adjustments to the underlying transports
to adapt to the new structure.
This reduces the overall amount of code duplication between the
transports and should make adding new transports more straightforward.
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
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This patch reworks the read_work function to enable it to directly use a passed
in rcall structure. This should help allow us to remove unnecessary copies
in the future.
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
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Apply the now common p9_req_t structure to the fd transport.
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
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Simplify trans_fd by using new common client tagpool structure.
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
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The virtio transport uses a simplified request management system
that I want to use for all transports. This patch adapts and moves the
exisiting code for managing requests to the client common code.
Later patches will apply these mechanisms to the other transports.
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
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The current trans_fd rpc mechanisms use a dynamic callback mechanism which
introduces a lot of complexity which only accomodates a single special case.
This patch removes much of that complexity in favor of a simple exception
mechanism to deal with flushes.
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
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Currently, trans_fd has two structures (p9_req and p9_mux-rpc)
which contain mostly duplicate data.
This patch consolidates these two structures and removes p9_mux_rpc.
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
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Cleanup files by reordering functions in order to remove need for
unnecessary function prototypes.
There are no code changes here, just functions being moved around and
prototypes being eliminated.
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
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Now that we are passing client state into the transport modules, remove
duplicate state which is present in transport private structures.
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
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Right now there is a transport module structure which provides per-transport
type functions and data and a transport structure which contains per-instance
public data as well as function pointers to instance specific functions.
This patch moves public transport visible instance data to the client
structure (which in some cases had duplicate data) and consolidates the
functions into the transport module structure.
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
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trans_fd used pool of upto 100 pollers to monitor the r/w fds. The
approach makes sense in userspace back when the only available
interfaces were poll(2) and select(2). As each event monitor -
trigger - handling iteration took O(n) where `n' is the number of
watched fds, it makes sense to spread them to many pollers such that
the `n' can be divided by the number of pollers. However, this
doesn't make any sense in kernel because persistent edge triggered
event monitoring is how the whole thing is implemented in the kernel
in the first place.
This patch converts trans_fd to use single poller which watches all
the fds instead of the poll of pollers approach. All the fds are
registered for monitoring on creation and only the fds with pending
events are scanned when something happens much like how epoll is
implemented.
This change makes trans_fd fd monitoring more efficient and simpler.
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
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* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6:
netfilter: replace old NF_ARP calls with NFPROTO_ARP
netfilter: fix compilation error with NAT=n
netfilter: xt_recent: use proc_create_data()
netfilter: snmp nat leaks memory in case of failure
netfilter: xt_iprange: fix range inversion match
netfilter: netns: use NFPROTO_NUMPROTO instead of NUMPROTO for tables array
netfilter: ctnetlink: remove obsolete NAT dependency from Kconfig
pkt_sched: sch_generic: Fix oops in sch_teql
dccp: Port redirection support for DCCP
tcp: Fix IPv6 fallout from 'Port redirection support for TCP'
netdev: change name dropping error codes
ipvs: Update CONFIG_IP_VS_IPV6 description and help text
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(Supplements: ee999d8b9573df1b547aacdc6d79f86eb79c25cd)
NFPROTO_ARP actually has a different value from NF_ARP, so ensure all
callers use the new value so that packets _do_ get delivered to the
registered hooks.
Signed-off-by: Jan Engelhardt <jengelh@medozas.de>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
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This patch fixes the compilation of ctnetlink when the NAT support
is not enabled.
/home/benh/kernels/linux-powerpc/net/netfilter/nf_conntrack_netlink.c:819: warning: enum nf_nat_manip_type\u2019 declared inside parameter list
/home/benh/kernels/linux-powerpc/net/netfilter/nf_conntrack_netlink.c:819: warning: its scope is only this definition or declaration, which is probably not what you want
Reported-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Reported by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Fixes a crash in recent_seq_start:
BUG: unable to handle kernel NULL pointer dereference at 0000000000000100
IP: [<ffffffffa002119c>] recent_seq_start+0x4c/0x90 [xt_recent]
PGD 17d33c067 PUD 107afe067 PMD 0
Oops: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC
CPU 0
Modules linked in: ipt_LOG xt_recent af_packet iptable_nat nf_nat nf_conntrack_ipv4 nf_conntrack nf_defrag_ipv4 xt_tcpudp iptable_filter ip_tables x_tables ext2 nls_utf8 fuse sr_mod cdrom [last unloaded: ntfs]
Pid: 32373, comm: cat Not tainted 2.6.27-04ab591808565f968d4406f6435090ad671ebdab #6
RIP: 0010:[<ffffffffa002119c>] [<ffffffffa002119c>] recent_seq_start+0x4c/0x90 [xt_recent]
RSP: 0018:ffff88015fed7e28 EFLAGS: 00010246
...
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Inverted IPv4 v1 and IPv6 v0 matches don't match anything since 2.6.25-rc1!
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Acked-by: Jan Engelhardt <jengelh@medozas.de>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Now that ctnetlink doesn't have any NAT module depenencies anymore,
we can also remove them from Kconfig.
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
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After these commands:
# modprobe sch_teql
# tc qdisc add dev eth0 root teql0
# tc qdisc del dev eth0 root
we get an oops in teql_destroy() when spin_lock is taken from a null
qdisc_sleeping pointer. It's because at the moment teql0 dev haven't
been activated yet, and a qdisc_root_sleeping() is pointing to noop
qdisc's netdev_queue with qdisc_sleeping uninitialized. This patch
fixes this both for noop and noqueue netdev_queues to avoid similar
problems in the future.
Signed-off-by: Jarek Poplawski <jarkao2@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Commit a3116ac5c216fc3c145906a46df9ce542ff7dcf2 from 1st October ("tcp: Port
redirection support for TCP") broke DCCP skb lookup by changing inet_csk_clone,
which is used by DCCP to generate the child socket after the handshake.
This patch updates DCCP to use 'loc_port' instead of 'sport', which fixes the
problem, and thus inheriting port redirection support via the new interface.
Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk>
Signed-off-by: KOVACS Krisztian <hidden@sch.bme.hu>
Acked-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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'tcp: Port redirection support for TCP' (a3116ac5c) added a new member
to inet_request_sock() which inet_csk_clone() makes use of but failed
to add proper initialization to the IPv6 syncookie code and missed a
couple of places where the new member should be used instead of
inet_sk(sk)->sport.
Signed-off-by: KOVACS Krisztian <hidden@sch.bme.hu>
Signed-off-by: David S. Miller <davem@davemloft.net>
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If changename notifier returns an error code, it gets incorrectly
cleared during rollback so the error is never returned to the user.
Found while testing similar code for MTU changes.
Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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This adds a URL to further info to the CONFIG_IP_VS_IPV6 Kconfig help
text. Also, I think it should be ok to remove the "DANGEROUS" label in the
description line at this point to get people to try it out and find all
the bugs ;) It's still marked as experimental, of course.
Signed-off-by: Julius Volz <juliusv@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6:
net: Remove CONFIG_KMOD from net/ (towards removing CONFIG_KMOD entirely)
ipv4: Add a missing rcu_assign_pointer() in routing cache.
[netdrvr] ibmtr: PCMCIA IBMTR is ok on 64bit
xen-netfront: Avoid unaligned accesses to IP header
lmc: copy_*_user under spinlock
[netdrvr] myri10ge, ixgbe: remove broken select INTEL_IOATDMA
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Some code here depends on CONFIG_KMOD to not try to load
protocol modules or similar, replace by CONFIG_MODULES
where more than just request_module depends on CONFIG_KMOD
and and also use try_then_request_module in ebtables.
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
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rt_intern_hash() is doing an update of a RCU guarded hash chain
without using rcu_assign_pointer() or equivalent barrier.
Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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* git://git.linux-nfs.org/projects/trondmy/nfs-2.6: (53 commits)
NFS: Fix a resolution problem with nfs_inode->cache_change_attribute
NFS: Fix the resolution problem with nfs_inode_attrs_need_update()
NFS: Changes to inode->i_nlinks must set the NFS_INO_INVALID_ATTR flag
RPC/RDMA: ensure connection attempt is complete before signalling.
RPC/RDMA: correct the reconnect timer backoff
RPC/RDMA: optionally emit useful transport info upon connect/disconnect.
RPC/RDMA: reformat a debug printk to keep lines together.
RPC/RDMA: harden connection logic against missing/late rdma_cm upcalls.
RPC/RDMA: fix connect/reconnect resource leak.
RPC/RDMA: return a consistent error, when connect fails.
RPC/RDMA: adhere to protocol for unpadded client trailing write chunks.
RPC/RDMA: avoid an oops due to disconnect racing with async upcalls.
RPC/RDMA: maintain the RPC task bytes-sent statistic.
RPC/RDMA: suppress retransmit on RPC/RDMA clients.
RPC/RDMA: fix connection IRD/ORD setting
RPC/RDMA: support FRMR client memory registration.
RPC/RDMA: check selected memory registration mode at runtime.
RPC/RDMA: add data types and new FRMR memory registration enum.
RPC/RDMA: refactor the inline memory registration code.
NFS: fix nfs_parse_ip_address() corner case
...
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The RPC/RDMA connection logic could return early from reconnection
attempts, leading to additional spurious retries.
Signed-off-by: Tom Talpey <talpey@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
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The RPC/RDMA code had a constant 5-second reconnect backoff, and
always performed it, even when re-establishing a connection to a
server after the RPC layer closed it due to being idle. Make it
an geometric backoff (up to 30 seconds), and don't delay idle
reconnect.
Signed-off-by: Tom Talpey <talpey@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
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Signed-off-by: Tom Talpey <talpey@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
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The send marshaling code split a particular dprintk across two
lines, which makes it hard to extract from logfiles.
Signed-off-by: Tom Talpey <talpey@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
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Add defensive timeouts to wait_for_completion() calls in RDMA
address resolution, and make them interruptible. Fix the timeout
units to milliseconds (formerly jiffies) and move to private header.
Signed-off-by: Tom Talpey <talpey@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
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The RPC/RDMA code can leak RDMA connection manager endpoints in
certain error cases on connect. Don't signal unwanted events,
and be certain to destroy any allocated qp.
Signed-off-by: Tom Talpey <talpey@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
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The xprt_connect call path does not expect such errors as ECONNREFUSED
to be returned from failed transport connection attempts, otherwise it
translates them to EIO and signals fatal errors. For example, mount.nfs
prints simply "internal error". Translate all such errors to ENOTCONN
from RPC/RDMA to match sockets behavior.
Signed-off-by: Tom Talpey <talpey@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
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The RPC/RDMA protocol allows clients and servers to avoid RDMA
operations for data which is purely the result of XDR padding.
On the client, automatically insert the necessary padding for
such server replies, and optionally don't marshal such chunks.
Signed-off-by: Tom Talpey <talpey@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
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