1. 29 3月, 2006 3 次提交
    • A
      [NETFILTER]: Rename init functions. · 65b4b4e8
      Andrew Morton 提交于
      Every netfilter module uses `init' for its module_init() function and
      `fini' or `cleanup' for its module_exit() function.
      
      Problem is, this creates uninformative initcall_debug output and makes
      ctags rather useless.
      
      So go through and rename them all to $(filename)_init and
      $(filename)_fini.
      Signed-off-by: NAndrew Morton <akpm@osdl.org>
      Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      65b4b4e8
    • S
      [TCP]: Fix RFC2465 typo. · c3e5d877
      S P 提交于
      Signed-off-by: NS P <speattle@yahoo.com>
      Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      c3e5d877
    • H
      [INET]: Introduce tunnel4/tunnel6 · d2acc347
      Herbert Xu 提交于
      Basically this patch moves the generic tunnel protocol stuff out of
      xfrm4_tunnel/xfrm6_tunnel and moves it into the new files of tunnel4.c
      and tunnel6 respectively.
      
      The reason for this is that the problem that Hugo uncovered is only
      the tip of the iceberg.  The real problem is that when we removed the
      dependency of ipip on xfrm4_tunnel we didn't really consider the module
      case at all.
      
      For instance, as it is it's possible to build both ipip and xfrm4_tunnel
      as modules and if the latter is loaded then ipip simply won't load.
      
      After considering the alternatives I've decided that the best way out of
      this is to restore the dependency of ipip on the non-xfrm-specific part
      of xfrm4_tunnel.  This is acceptable IMHO because the intention of the
      removal was really to be able to use ipip without the xfrm subsystem.
      This is still preserved by this patch.
      
      So now both ipip/xfrm4_tunnel depend on the new tunnel4.c which handles
      the arbitration between the two.  The order of processing is determined
      by a simple integer which ensures that ipip gets processed before
      xfrm4_tunnel.
      
      The situation for ICMP handling is a little bit more complicated since
      we may not have enough information to determine who it's for.  It's not
      a big deal at the moment since the xfrm ICMP handlers are basically
      no-ops.  In future we can deal with this when we look at ICMP caching
      in general.
      
      The user-visible change to this is the removal of the TUNNEL Kconfig
      prompts.  This makes sense because it can only be used through IPCOMP
      as it stands.
      
      The addition of the new modules shouldn't introduce any problems since
      module dependency will cause them to be loaded.
      
      Oh and I also turned some unnecessary pskb's in IPv6 related to this
      patch to skb's.
      Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>
      Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      d2acc347
  2. 28 3月, 2006 1 次提交
    • A
      [PATCH] Notifier chain update: API changes · e041c683
      Alan Stern 提交于
      The kernel's implementation of notifier chains is unsafe.  There is no
      protection against entries being added to or removed from a chain while the
      chain is in use.  The issues were discussed in this thread:
      
          http://marc.theaimsgroup.com/?l=linux-kernel&m=113018709002036&w=2
      
      We noticed that notifier chains in the kernel fall into two basic usage
      classes:
      
      	"Blocking" chains are always called from a process context
      	and the callout routines are allowed to sleep;
      
      	"Atomic" chains can be called from an atomic context and
      	the callout routines are not allowed to sleep.
      
      We decided to codify this distinction and make it part of the API.  Therefore
      this set of patches introduces three new, parallel APIs: one for blocking
      notifiers, one for atomic notifiers, and one for "raw" notifiers (which is
      really just the old API under a new name).  New kinds of data structures are
      used for the heads of the chains, and new routines are defined for
      registration, unregistration, and calling a chain.  The three APIs are
      explained in include/linux/notifier.h and their implementation is in
      kernel/sys.c.
      
      With atomic and blocking chains, the implementation guarantees that the chain
      links will not be corrupted and that chain callers will not get messed up by
      entries being added or removed.  For raw chains the implementation provides no
      guarantees at all; users of this API must provide their own protections.  (The
      idea was that situations may come up where the assumptions of the atomic and
      blocking APIs are not appropriate, so it should be possible for users to
      handle these things in their own way.)
      
      There are some limitations, which should not be too hard to live with.  For
      atomic/blocking chains, registration and unregistration must always be done in
      a process context since the chain is protected by a mutex/rwsem.  Also, a
      callout routine for a non-raw chain must not try to register or unregister
      entries on its own chain.  (This did happen in a couple of places and the code
      had to be changed to avoid it.)
      
      Since atomic chains may be called from within an NMI handler, they cannot use
      spinlocks for synchronization.  Instead we use RCU.  The overhead falls almost
      entirely in the unregister routine, which is okay since unregistration is much
      less frequent that calling a chain.
      
      Here is the list of chains that we adjusted and their classifications.  None
      of them use the raw API, so for the moment it is only a placeholder.
      
        ATOMIC CHAINS
        -------------
      arch/i386/kernel/traps.c:		i386die_chain
      arch/ia64/kernel/traps.c:		ia64die_chain
      arch/powerpc/kernel/traps.c:		powerpc_die_chain
      arch/sparc64/kernel/traps.c:		sparc64die_chain
      arch/x86_64/kernel/traps.c:		die_chain
      drivers/char/ipmi/ipmi_si_intf.c:	xaction_notifier_list
      kernel/panic.c:				panic_notifier_list
      kernel/profile.c:			task_free_notifier
      net/bluetooth/hci_core.c:		hci_notifier
      net/ipv4/netfilter/ip_conntrack_core.c:	ip_conntrack_chain
      net/ipv4/netfilter/ip_conntrack_core.c:	ip_conntrack_expect_chain
      net/ipv6/addrconf.c:			inet6addr_chain
      net/netfilter/nf_conntrack_core.c:	nf_conntrack_chain
      net/netfilter/nf_conntrack_core.c:	nf_conntrack_expect_chain
      net/netlink/af_netlink.c:		netlink_chain
      
        BLOCKING CHAINS
        ---------------
      arch/powerpc/platforms/pseries/reconfig.c:	pSeries_reconfig_chain
      arch/s390/kernel/process.c:		idle_chain
      arch/x86_64/kernel/process.c		idle_notifier
      drivers/base/memory.c:			memory_chain
      drivers/cpufreq/cpufreq.c		cpufreq_policy_notifier_list
      drivers/cpufreq/cpufreq.c		cpufreq_transition_notifier_list
      drivers/macintosh/adb.c:		adb_client_list
      drivers/macintosh/via-pmu.c		sleep_notifier_list
      drivers/macintosh/via-pmu68k.c		sleep_notifier_list
      drivers/macintosh/windfarm_core.c	wf_client_list
      drivers/usb/core/notify.c		usb_notifier_list
      drivers/video/fbmem.c			fb_notifier_list
      kernel/cpu.c				cpu_chain
      kernel/module.c				module_notify_list
      kernel/profile.c			munmap_notifier
      kernel/profile.c			task_exit_notifier
      kernel/sys.c				reboot_notifier_list
      net/core/dev.c				netdev_chain
      net/decnet/dn_dev.c:			dnaddr_chain
      net/ipv4/devinet.c:			inetaddr_chain
      
      It's possible that some of these classifications are wrong.  If they are,
      please let us know or submit a patch to fix them.  Note that any chain that
      gets called very frequently should be atomic, because the rwsem read-locking
      used for blocking chains is very likely to incur cache misses on SMP systems.
      (However, if the chain's callout routines may sleep then the chain cannot be
      atomic.)
      
      The patch set was written by Alan Stern and Chandra Seetharaman, incorporating
      material written by Keith Owens and suggestions from Paul McKenney and Andrew
      Morton.
      
      [jes@sgi.com: restructure the notifier chain initialization macros]
      Signed-off-by: NAlan Stern <stern@rowland.harvard.edu>
      Signed-off-by: NChandra Seetharaman <sekharan@us.ibm.com>
      Signed-off-by: NJes Sorensen <jes@sgi.com>
      Signed-off-by: NAndrew Morton <akpm@osdl.org>
      Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
      e041c683
  3. 27 3月, 2006 1 次提交
  4. 26 3月, 2006 1 次提交
    • D
      [PATCH] POLLRDHUP/EPOLLRDHUP handling for half-closed devices notifications · f348d70a
      Davide Libenzi 提交于
      Implement the half-closed devices notifiation, by adding a new POLLRDHUP
      (and its alias EPOLLRDHUP) bit to the existing poll/select sets.  Since the
      existing POLLHUP handling, that does not report correctly half-closed
      devices, was feared to be changed, this implementation leaves the current
      POLLHUP reporting unchanged and simply add a new bit that is set in the few
      places where it makes sense.  The same thing was discussed and conceptually
      agreed quite some time ago:
      
      http://lkml.org/lkml/2003/7/12/116
      
      Since this new event bit is added to the existing Linux poll infrastruture,
      even the existing poll/select system calls will be able to use it.  As far
      as the existing POLLHUP handling, the patch leaves it as is.  The
      pollrdhup-2.6.16.rc5-0.10.diff defines the POLLRDHUP for all the existing
      archs and sets the bit in the six relevant files.  The other attached diff
      is the simple change required to sys/epoll.h to add the EPOLLRDHUP
      definition.
      
      There is "a stupid program" to test POLLRDHUP delivery here:
      
       http://www.xmailserver.org/pollrdhup-test.c
      
      It tests poll(2), but since the delivery is same epoll(2) will work equally.
      Signed-off-by: NDavide Libenzi <davidel@xmailserver.org>
      Cc: "David S. Miller" <davem@davemloft.net>
      Cc: Michael Kerrisk <mtk-manpages@gmx.net>
      Signed-off-by: NAndrew Morton <akpm@osdl.org>
      Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
      f348d70a
  5. 25 3月, 2006 3 次提交
  6. 24 3月, 2006 1 次提交
  7. 23 3月, 2006 7 次提交
  8. 21 3月, 2006 23 次提交