Gerrit Renker
0c86962076
[DCCP]: Integrate state transitions for passive-close ...
This adds the necessary state transitions for the two forms of passive-close
* PASSIVE_CLOSE - which is entered when a host receives a Close;
* PASSIVE_CLOSEREQ - which is entered when a client receives a CloseReq.
Here is a detailed account of what the patch does in each state.
1) Receiving CloseReq
The pseudo-code in 8.5 says:
Step 13: Process CloseReq
If P.type == CloseReq and S.state < CLOSEREQ,
Generate Close
S.state := CLOSING
Set CLOSING timer.
This means we need to address what to do in CLOSED, LISTEN, REQUEST, RESPOND, PARTOPEN, and OPEN.
* CLOSED: silently ignore - it may be a late or duplicate CloseReq;
* LISTEN/RESPOND: will not appear, since Step 7 is performed first (we know we are the client);
* REQUEST: perform Step 13 directly (no need to enqueue packet);
* OPEN/PARTOPEN: enter PASSIVE_CLOSEREQ so that the application has a chance to process unread data.
When already in PASSIVE_CLOSEREQ, no second CloseReq is enqueued. In any other state, the CloseReq is ignored.
I think that this offers some robustness against rare and pathological cases: e.g. a simultaneous close where
the client sends a Close and the server a CloseReq. The client will then be retransmitting its Close until it
gets the Reset, so ignoring the CloseReq while in state CLOSING is sane.
2) Receiving Close
The code below from 8.5 is unconditional.
Step 14: Process Close
If P.type == Close,
Generate Reset(Closed)
Tear down connection
Drop packet and return
Thus we need to consider all states:
* CLOSED: silently ignore, since this can happen when a retransmitted or late Close arrives;
* LISTEN: dccp_rcv_state_process() will generate a Reset ("No Connection");
* REQUEST: perform Step 14 directly (no need to enqueue packet);
* RESPOND: dccp_check_req() will generate a Reset ("Packet Error") -- left it at that;
* OPEN/PARTOPEN: enter PASSIVE_CLOSE so that application has a chance to process unread data;
* CLOSEREQ: server performed active-close -- perform Step 14;
* CLOSING: simultaneous-close: use a tie-breaker to avoid message ping-pong (see comment);
* PASSIVE_CLOSEREQ: ignore - the peer has a bug (sending first a CloseReq and now a Close);
* TIMEWAIT: packet is ignored.
Note that the condition of receiving a packet in state CLOSED here is different from the condition "there
is no socket for such a connection": the socket still exists, but its state indicates it is unusable.
Last, dccp_finish_passive_close sets either DCCP_CLOSED or DCCP_CLOSING = TCP_CLOSING, so that
sk_stream_wait_close() will wait for the final Reset (which will trigger CLOSING => CLOSED).
Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28 14:55:13 -08:00
[CAN]: Add missing Kbuild entries
2008-01-28 14:54:13 -08:00
i2c/tps65010: move header to <linux/i2c/...>
2008-01-27 18:14:49 +01:00
mmc: remove unused 'mode' from the mmc_host structure
2007-12-12 20:01:01 +01:00
[NETFILTER]: Introduce NF_INET_ hook values
2008-01-28 14:53:55 -08:00
[NETFILTER]: Introduce NF_INET_ hook values
2008-01-28 14:53:55 -08:00
[NETFILTER]: Introduce NF_INET_ hook values
2008-01-28 14:53:55 -08:00
SUNRPC: make sunrpc/xprtsock.c:xs_setup_{udp,tcp}() static
2007-11-26 16:24:50 -05:00
[NET] tc_nat: header install
2007-12-26 19:36:35 -08:00
ACPI: make _OSI(Linux) console messages smarter
2008-01-23 21:26:15 -05:00
Remove struct task_struct::io_wait
2007-10-18 14:37:20 -07:00
apm_event{,info}_t are userspace types
2007-12-17 19:28:16 -08:00
libata annotations and fixes
2008-01-23 05:24:15 -05:00
[SCSI] attribute_container: update to use the group interface
2008-01-23 11:29:17 -06:00
[PATCH] audit: watching subtrees
2007-10-21 02:37:45 -04:00
bit_spin_lock: use lock bitops
2007-10-18 14:37:29 -07:00
remove BITS_TO_TYPE macro
2007-10-19 11:53:42 -07:00
remove BITS_TO_TYPE macro
2007-10-19 11:53:42 -07:00
Merge branch 'for-2.6.25' of git://git.kernel.dk/linux-2.6-block
2008-01-29 08:51:56 +11:00
blktrace: Add blktrace ioctls to SCSI generic devices
2008-01-28 10:04:46 +01:00
Revert "x86_64: allocate sparsemem memmap above 4G"
2007-10-29 14:05:37 -07:00
[CAN]: Add PF_CAN core module
2008-01-28 14:54:10 -08:00
capabilities: clean up file capability reading
2007-10-22 08:13:18 -07:00
cdrom: add more GPCMD_* constants
2008-01-23 05:24:14 -05:00
Add cgroupstats
2007-10-19 11:53:36 -07:00
sched: cpu accounting controller (V2)
2007-12-02 20:04:49 +01:00
Add cgroupstats
2007-10-19 11:53:36 -07:00
Fix discrepancy between VDSO based gettimeofday() and sys_gettimeofday().
2007-10-18 14:37:20 -07:00
Replace __attribute_pure__ with __pure
2007-10-18 14:37:32 -07:00
Permit silencing of __deprecated warnings.
2007-10-25 15:10:17 -07:00
sched: fix fastcall mismatch in completion APIs
2007-10-24 18:23:48 +02:00
cpu-hotplug: fix build on !CONFIG_SMP
2008-01-25 21:08:02 +01:00
cpuidle: fix HP nx6125 regression
2007-11-19 21:43:22 -05:00
CPU hotplug: fix cpu_is_offline() on !CONFIG_HOTPLUG_CPU
2008-01-06 12:39:42 -08:00
hotplug cpu: migrate a task within its cpuset
2007-10-19 11:53:44 -07:00
[CRYPTO] api: Set default CRYPTO_MINALIGN to unsigned long long
2008-01-11 08:17:01 +11:00
Char: cyclades, fix some -W warnings
2007-10-18 14:37:26 -07:00
[PATCH] audit: watching subtrees
2007-10-21 02:37:45 -04:00
[DCCP]: Integrate state transitions for passive-close
2008-01-28 14:55:13 -08:00
softlockup: automatically detect hung TASK_UNINTERRUPTIBLE tasks
2008-01-25 21:08:02 +01:00
Add cgroupstats
2007-10-19 11:53:36 -07:00
dm: merge max_hw_sector
2007-12-20 17:32:12 +00:00
Driver core: fix coding style issues in device.h
2008-01-24 21:04:46 -08:00
dlm: Split lock mode and flag constants into a sharable header.
2008-01-25 14:46:04 -08:00
dlm: Split lock mode and flag constants into a sharable header.
2008-01-25 14:46:04 -08:00
dm io:ctl use constant struct size
2007-10-20 02:00:58 +01:00
stop using DMA_xxBIT_MASK
2007-10-18 14:37:21 -07:00
DMA: Convert from class_device to device for DMA engine
2008-01-24 20:40:05 -08:00
Intel IOMMU: DMAR fault handling support
2007-10-22 08:13:19 -07:00
DMI: create dmi_get_slot()
2008-01-23 21:23:13 -05:00
Make asm-x86/bootparam.h includable from userspace.
2007-10-23 15:49:47 +10:00
kexec: add BSS to resource tree
2007-10-22 08:13:19 -07:00
efs: new export ops
2007-10-22 08:13:20 -07:00
block: let elv_register() return void
2007-12-18 08:29:28 +01:00
x86 merge fallout: uml
2007-10-29 07:41:32 -07:00
exportfs: update documentation
2007-10-22 08:13:21 -07:00
fix up ext2_fs.h for userspace after reservations backport
2007-11-29 09:24:53 -08:00
Fix 64KB blocksize in ext3 directories
2007-11-14 18:45:43 -08:00
hwmon: (f75375s) Allow setting up fans with platform_data
2007-11-08 08:42:46 -05:00
kobject: convert main fs kobject to use kobject_create
2008-01-24 20:40:13 -08:00
[PATCH] pass dentry to audit_inode()/audit_inode_child()
2007-10-21 02:37:18 -04:00
fuse: pass open flags to read and write
2007-11-29 09:24:54 -08:00
sched, futex: detach sched.h and futex.h
2008-01-25 21:08:34 +01:00
Driver core: convert block from raw kobjects to core devices
2008-01-24 20:40:36 -08:00
sched: remove the !PREEMPT_BKL code
2008-01-25 21:08:33 +01:00
ide: remove 'command_type' field from ide_task_t
2008-01-25 22:17:14 +01:00
HID: Support Samsung IR remote
2008-01-28 14:51:22 +01:00
hrtimer: fixup the HRTIMER_CB_IRQSAFE_NO_SOFTIRQ fallback
2008-01-25 21:08:31 +01:00
Revert "hugetlb: Add hugetlb_dynamic_pool sysctl"
2007-12-17 19:28:17 -08:00
[HWRNG]: move status polling loop to data_present callbacks
2008-01-11 08:16:16 +11:00
i2c: Discard unused driver IDs
2008-01-27 18:14:50 +01:00
i2c: Add i2c_new_dummy() utility
2008-01-27 18:14:52 +01:00
Input: i8042 - export i8042_command()
2007-10-22 00:56:52 -04:00
ide: switch set_xfer_rate() to use REQ_TYPE_ATA_TASKFILE requests
2008-01-26 20:13:12 +01:00
mac80211: adding 802.11n definitions in ieee80211.h
2008-01-28 14:54:38 -08:00
[IPV6]: Add RFC4214 support
2008-01-28 14:55:09 -08:00
[IPV6] ADDRCONF: Support RFC3484 configurable address selection policy table.
2008-01-28 14:53:58 -08:00
[CAN]: Allocate protocol numbers for PF_CAN
2008-01-28 14:54:09 -08:00
bonding: Add new layer2+3 hash for xor/802.3ad modes
2007-12-07 15:00:32 -05:00
[CAN]: Allocate protocol numbers for PF_CAN
2008-01-28 14:54:09 -08:00
[IPV6]: Add RFC4214 support
2008-01-28 14:55:09 -08:00
[IPV6]: Add RFC4214 support
2008-01-28 14:55:09 -08:00
[LRO]: fix lro_gen_skb() alignment
2007-12-05 05:37:32 -08:00
ioprio: move io priority from task_struct to io_context
2008-01-28 10:50:29 +01:00
[PATCH] new helper - inotify_evict_watch()
2007-10-21 02:37:38 -04:00
Input: adds the context menu key (HUT GenDesc 0x84)
2007-11-27 00:47:04 -05:00
Preempt-RCU: Use softirq instead of tasklets for
2008-01-25 21:08:23 +01:00
block: cfq: make the io contect sharing lockless
2008-01-28 10:50:33 +01:00
ioprio: move io priority from task_struct to io_context
2008-01-28 10:50:29 +01:00
virtualization of sysv msg queues is incomplete
2007-10-19 11:53:48 -07:00
IPMI: add polled interface
2007-10-18 14:37:32 -07:00
IPMI: fix comparison in demangle_device_id
2007-10-30 08:06:55 -07:00
genirq: add unlocked version of set_irq_handler()
2007-12-18 18:05:58 +01:00
jbd: Fix assertion failure in fs/jbd/checkpoint.c
2007-12-05 09:21:20 -08:00
timers: don't #error on higher HZ values
2008-01-25 21:08:34 +01:00
Missing include file in kallsyms.h
2007-11-05 15:12:32 -08:00
[CAN]: Add missing Kbuild entries
2008-01-28 14:54:13 -08:00
Fix <linux/kd.h> usage in userspace
2007-11-29 09:24:52 -08:00
sched: do not do cond_resched() when CONFIG_PREEMPT
2008-01-25 21:08:28 +01:00
Add scaled time to taskstats based process accounting
2007-10-18 14:37:28 -07:00
Extended crashkernel command line
2007-10-19 11:53:49 -07:00
KEYS: fix macro
2008-01-08 16:10:35 -08:00
Console keyboard events and accessibility
2007-10-19 11:53:33 -07:00
Kobject: fix coding style issues in kobject.h
2008-01-24 21:27:06 -08:00
kref: add kref_set()
2008-01-24 20:40:05 -08:00
sched: latencytop support
2008-01-25 21:08:34 +01:00
leds: Fix led trigger locking bugs
2007-12-07 09:06:53 +00:00
lguest: documentation update
2007-10-25 15:02:50 +10:00
lguest: documentation update
2007-10-25 15:02:50 +10:00
libata: factor out ata_pci_activate_sff_host() from ata_pci_one()
2008-01-23 05:24:16 -05:00
add WEAK() for creating weak asm labels
2007-10-22 08:13:17 -07:00
kernel-api docbook: fix content problems
2007-10-19 11:53:35 -07:00
workqueue: debug flushing deadlocks with lockdep
2007-10-19 11:53:38 -07:00
Task Control Groups: basic task cgroup framework
2007-10-19 11:53:36 -07:00
Linux Kernel Markers - Samples
2007-10-19 11:53:55 -07:00
rtc: fall back to requesting only the ports we actually use
2007-11-14 18:45:41 -08:00
memory hotplug: make kmem_cache_node for SLUB on memory online avoid panic
2007-10-22 08:13:17 -07:00
Task Control Groups: make cpusets a client of cgroups
2007-10-19 11:53:36 -07:00
Security: remove security.h include from mm.h
2008-01-25 11:29:49 +11:00
Virtio interface
2007-10-23 15:49:54 +10:00
Driver core: move the driver specific module code into the driver core
2008-01-24 20:40:35 -08:00
[IPV4]: Clean the ip_sockglue.c from some ugly ifdefs
2007-11-07 04:08:55 -08:00
ipc: store ipcs into IDRs
2007-10-19 11:53:44 -07:00
[I2C] Split mv643xx I2C platform support
2008-01-26 15:03:59 +00:00
mv643xx_eth: Fix MV643XX_ETH offsets used by Pegasos 2
2007-10-30 14:32:16 -04:00
[I2C] i2c-mv64xxx: Don't set i2c_adapter.retries
2008-01-26 15:04:01 +00:00
[NET]: Name magic constants in sock_wake_async()
2008-01-28 14:55:03 -08:00
[NET]: Add NAPI_STATE_DISABLE.
2008-01-08 23:30:07 -08:00
[NETFILTER]: Introduce NF_INET_ hook values
2008-01-28 14:53:55 -08:00
[NETFILTER]: bridge: fix missing link layer headers on outgoing routed packets
2007-12-14 13:54:39 -08:00
[NETFILTER]: Introduce NF_INET_ hook values
2008-01-28 14:53:55 -08:00
[NETFILTER]: Introduce NF_INET_ hook values
2008-01-28 14:53:55 -08:00
[NETLINK]: Fix unicast timeouts
2007-11-07 04:15:12 -08:00
[NETPOLL]: Don't need rx_flags.
2008-01-28 14:54:18 -08:00
NFS: make nfs_wb_page_priority() static
2007-11-26 16:24:48 -05:00
cpu-hotplug: replace per-subsystem mutexes with get_online_cpus()
2008-01-25 21:08:02 +01:00
Make access to task's nsproxy lighter
2007-10-19 11:53:37 -07:00
remove asm/bitops.h includes
2007-10-19 11:53:41 -07:00
[PARPORT] Remove unused 'irq' argument from parport irq functions
2007-10-23 19:53:16 -04:00
PCI: Add Kconfig option to disable deprecated pci_find_* API
2007-11-05 13:35:17 -08:00
kset: convert pci hotplug to use kset_create_and_add
2008-01-24 20:40:14 -08:00
ata_generic: Cenatek support
2008-01-23 05:24:17 -05:00
[PCOUNTER] Fix build error without CONFIG_SMP
2008-01-28 14:54:50 -08:00
Misc: phantom, improved data passing
2007-10-19 11:53:41 -07:00
PHY: Add the phy_device_release device method.
2007-12-04 15:06:33 -05:00
Uninline find_pid etc set of functions
2007-10-19 11:53:41 -07:00
pidns: Place under CONFIG_EXPERIMENTAL
2007-11-14 18:45:43 -08:00
pktcdvd: Convert from class_device to device for block/pktcdvd
2008-01-24 20:40:06 -08:00
Driver Core: constify the name passed to platform_device_register_simple
2008-01-24 20:40:43 -08:00
PM: ACPI and APM must not be enabled at the same time
2008-01-11 12:26:47 -05:00
PM: ACPI and APM must not be enabled at the same time
2008-01-11 12:26:47 -05:00
increase PNP_MAX_PORT to 40 from 24
2007-12-27 23:55:13 -05:00
x86 & generic: change to __builtin_prefetch()
2007-10-19 20:35:04 +02:00
Fix cpusets update_cpumask
2007-10-19 11:53:41 -07:00
proc: fix proc_dir_entry refcounting
2007-12-05 09:21:20 -08:00
restrict reading from /proc/<pid>/maps to those who share ->mm or can ptrace pid
2008-01-02 13:13:27 -08:00
quicklists: do not release off node pages early
2007-12-23 12:54:36 -08:00
Preempt-RCU: implementation
2008-01-25 21:08:24 +01:00
Preempt-RCU: implementation
2008-01-25 21:08:24 +01:00
Preempt-RCU: implementation
2008-01-25 21:08:24 +01:00
Preempt-RCU: implementation
2008-01-25 21:08:24 +01:00
reiserfs: new export ops
2007-10-22 08:13:20 -07:00
reiserfs: remove first_zero_hint
2007-10-19 11:53:35 -07:00
RTC: convert mutex to bitfield
2007-11-29 09:24:54 -08:00
[NET]: Make rtnetlink infrastructure network namespace aware (v3)
2008-01-28 14:54:25 -08:00
SG: work with the SCSI fixed maximum allocations.
2008-01-28 10:54:49 +01:00
kernel: add CLONE_IO to specifically request sharing of IO contexts
2008-01-28 10:50:36 +01:00
x86_64 EFI boot support: EFI frame buffer driver
2007-11-29 09:24:54 -08:00
security/selinux: constify function pointer tables and fields
2008-01-25 11:29:54 +11:00
SELinux: return EOPNOTSUPP not ENOTSUPP
2007-11-17 10:38:16 +11:00
ipc: store ipcs into IDRs
2007-10-19 11:53:44 -07:00
[NET]: Consolidate net namespace related proc files creation.
2008-01-28 14:54:28 -08:00
IP22ZILOG: fix lockup and sysrq
2007-11-29 09:24:53 -08:00
ipc: store ipcs into IDRs
2007-10-19 11:53:44 -07:00
[TCP]: Splice receive support.
2008-01-28 14:53:31 -08:00
Unify /proc/slabinfo configuration
2008-01-02 13:04:48 -08:00
Unify /proc/slabinfo configuration
2008-01-02 13:04:48 -08:00
Unify /proc/slabinfo configuration
2008-01-02 13:04:48 -08:00
KVM: fix !SMP build error
2007-11-09 22:39:38 +01:00
sched: remove the !PREEMPT_BKL code
2008-01-25 21:08:33 +01:00
[CAN]: Allocate protocol numbers for PF_CAN
2008-01-28 14:54:09 -08:00
[SPLICE]: Don't assume regular pages in splice_to_pipe()
2008-01-28 14:53:30 -08:00
sched: latencytop support
2008-01-25 21:08:34 +01:00
[TIPC]: Fix headercheck wrt. tipc_config.h
2007-10-30 21:44:00 -07:00
Hibernation: Check if ACPI is enabled during restore in the right place
2007-10-18 14:37:20 -07:00
[S390] appldata: remove unused binary sysctls.
2007-11-20 11:13:45 +01:00
Driver core: change sysdev classes to use dynamic kobject names
2008-01-24 20:40:40 -08:00
[SCSI] sysfs: add filter function to groups
2008-01-23 11:29:18 -06:00
add-scaled-time-to-taskstats-based-process-accounting fix
2007-10-18 14:37:28 -07:00
[TCP]: Rewrite SACK block processing & sack_recv_cache use
2008-01-28 14:54:07 -08:00
futex: fix for futex_wait signal stack corruption
2007-12-05 15:46:09 +01:00
tifm: Convert from class_device to device for TI flash media
2008-01-24 20:40:06 -08:00
time: add ADJ_OFFSET_SS_READ
2007-11-26 20:42:19 +01:00
sched: whitespace cleanups in topology.h
2008-01-25 21:08:20 +01:00
[CAN]: Allocate protocol numbers for PF_CAN
2008-01-28 14:54:09 -08:00
fix abuses of ptrdiff_t
2007-10-29 07:41:33 -07:00
get rid of input BIT* duplicate defines
2007-10-19 11:53:42 -07:00
UIO: fix kobject usage
2008-01-24 20:40:26 -08:00
usb.h: fix kernel-doc warning
2007-12-17 10:47:15 -08:00
usb-storage: Fix devices that cannot handle 32k transfers
2007-12-17 10:47:14 -08:00
USB: Fix signr comment in usbdevice_fs.h
2007-11-28 13:58:34 -08:00
[VETH]: move veth.h to include/linux
2007-12-26 19:36:35 -08:00
V4L/DVB (6320): v4l core: remove the unused .hardware V4L1 field
2007-10-22 12:01:24 -02:00
V4L/DVB (6321): Remove obsolete VIDIOC_S/G_MPEGCOMP ioctls
2007-10-22 12:01:30 -02:00
Virtio interface
2007-10-23 15:49:54 +10:00
9p: add virtio transport
2007-10-23 13:47:31 -05:00
Block driver using virtio.
2007-10-23 15:49:54 +10:00
Virtio interface
2007-10-23 15:49:54 +10:00
Virtio console driver
2007-10-23 15:49:55 +10:00
Net driver using virtio
2007-10-23 15:49:54 +10:00
virtio: Force use of power-of-two for descriptor ring sizes
2007-11-12 13:59:40 +11:00
Console events and accessibility
2007-10-19 11:53:34 -07:00
lockdep: fix workqueue creation API lockdep interaction
2008-01-16 09:51:58 +01:00
Revert "writeback: introduce writeback_control.more_io to indicate more io"
2008-01-14 21:21:29 -08:00
0c86962076