1. 14 2月, 2012 1 次提交
  2. 09 12月, 2011 1 次提交
  3. 24 3月, 2011 1 次提交
  4. 07 4月, 2009 2 次提交
    • S
      namespaces: ipc namespaces: implement support for posix msqueues · 7eafd7c7
      Serge E. Hallyn 提交于
      Implement multiple mounts of the mqueue file system, and link it to usage
      of CLONE_NEWIPC.
      
      Each ipc ns has a corresponding mqueuefs superblock.  When a user does
      clone(CLONE_NEWIPC) or unshare(CLONE_NEWIPC), the unshare will cause an
      internal mount of a new mqueuefs sb linked to the new ipc ns.
      
      When a user does 'mount -t mqueue mqueue /dev/mqueue', he mounts the
      mqueuefs superblock.
      
      Posix message queues can be worked with both through the mq_* system calls
      (see mq_overview(7)), and through the VFS through the mqueue mount.  Any
      usage of mq_open() and friends will work with the acting task's ipc
      namespace.  Any actions through the VFS will work with the mqueuefs in
      which the file was created.  So if a user doesn't remount mqueuefs after
      unshare(CLONE_NEWIPC), mq_open("/ab") will not be reflected in "ls
      /dev/mqueue".
      
      If task a mounts mqueue for ipc_ns:1, then clones task b with a new ipcns,
      ipcns:2, and then task a is the last task in ipc_ns:1 to exit, then (1)
      ipc_ns:1 will be freed, (2) it's superblock will live on until task b
      umounts the corresponding mqueuefs, and vfs actions will continue to
      succeed, but (3) sb->s_fs_info will be NULL for the sb corresponding to
      the deceased ipc_ns:1.
      
      To make this happen, we must protect the ipc reference count when
      
      a) a task exits and drops its ipcns->count, since it might be dropping
         it to 0 and freeing the ipcns
      
      b) a task accesses the ipcns through its mqueuefs interface, since it
         bumps the ipcns refcount and might race with the last task in the ipcns
         exiting.
      
      So the kref is changed to an atomic_t so we can use
      atomic_dec_and_lock(&ns->count,mq_lock), and every access to the ipcns
      through ns = mqueuefs_sb->s_fs_info is protected by the same lock.
      Signed-off-by: NCedric Le Goater <clg@fr.ibm.com>
      Signed-off-by: NSerge E. Hallyn <serue@us.ibm.com>
      Cc: Alexey Dobriyan <adobriyan@gmail.com>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      7eafd7c7
    • S
      namespaces: mqueue ns: move mqueue_mnt into struct ipc_namespace · 614b84cf
      Serge E. Hallyn 提交于
      Move mqueue vfsmount plus a few tunables into the ipc_namespace struct.
      The CONFIG_IPC_NS boolean and the ipc_namespace struct will serve both the
      posix message queue namespaces and the SYSV ipc namespaces.
      
      The sysctl code will be fixed separately in patch 3.  After just this
      patch, making a change to posix mqueue tunables always changes the values
      in the initial ipc namespace.
      Signed-off-by: NCedric Le Goater <clg@fr.ibm.com>
      Signed-off-by: NSerge E. Hallyn <serue@us.ibm.com>
      Cc: Alexey Dobriyan <adobriyan@gmail.com>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      614b84cf
  5. 14 12月, 2006 1 次提交
    • R
      [PATCH] getting rid of all casts of k[cmz]alloc() calls · 5cbded58
      Robert P. J. Day 提交于
      Run this:
      
      	#!/bin/sh
      	for f in $(grep -Erl "\([^\)]*\) *k[cmz]alloc" *) ; do
      	  echo "De-casting $f..."
      	  perl -pi -e "s/ ?= ?\([^\)]*\) *(k[cmz]alloc) *\(/ = \1\(/" $f
      	done
      
      And then go through and reinstate those cases where code is casting pointers
      to non-pointers.
      
      And then drop a few hunks which conflicted with outstanding work.
      
      Cc: Russell King <rmk@arm.linux.org.uk>, Ian Molton <spyro@f2s.com>
      Cc: Mikael Starvik <starvik@axis.com>
      Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
      Cc: Roman Zippel <zippel@linux-m68k.org>
      Cc: Geert Uytterhoeven <geert@linux-m68k.org>
      Cc: Ralf Baechle <ralf@linux-mips.org>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Kyle McMartin <kyle@mcmartin.ca>
      Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
      Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
      Cc: "David S. Miller" <davem@davemloft.net>
      Cc: Jeff Dike <jdike@addtoit.com>
      Cc: Greg KH <greg@kroah.com>
      Cc: Jens Axboe <jens.axboe@oracle.com>
      Cc: Paul Fulghum <paulkf@microgate.com>
      Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
      Cc: Karsten Keil <kkeil@suse.de>
      Cc: Mauro Carvalho Chehab <mchehab@infradead.org>
      Cc: Jeff Garzik <jeff@garzik.org>
      Cc: James Bottomley <James.Bottomley@steeleye.com>
      Cc: Ian Kent <raven@themaw.net>
      Cc: Steven French <sfrench@us.ibm.com>
      Cc: David Woodhouse <dwmw2@infradead.org>
      Cc: Neil Brown <neilb@cse.unsw.edu.au>
      Cc: Jaroslav Kysela <perex@suse.cz>
      Cc: Takashi Iwai <tiwai@suse.de>
      Signed-off-by: NAndrew Morton <akpm@osdl.org>
      Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
      5cbded58
  6. 04 10月, 2006 1 次提交
  7. 17 4月, 2005 1 次提交
    • L
      Linux-2.6.12-rc2 · 1da177e4
      Linus Torvalds 提交于
      Initial git repository build. I'm not bothering with the full history,
      even though we have it. We can create a separate "historical" git
      archive of that later if we want to, and in the meantime it's about
      3.2GB when imported into git - space that would just make the early
      git days unnecessarily complicated, when we don't have a lot of good
      infrastructure for it.
      
      Let it rip!
      1da177e4