linux-toradex.git/include/linux/proc_fs.h, branch v3.0.3

mm: extract exe_file handling from procfs

2011-05-27T00:12:36+00:00

Setup and cleanup of mm_struct->exe_file is currently done in fs/proc/.
This was because exe_file was needed only for /proc//exe.  Since we
will need the exe_file functionality also for core dumps (so core name can
contain full binary path), built this functionality always into the
kernel.

To achieve that move that out of proc FS to the kernel/ where in fact it
should belong.  By doing that we can make dup_mm_exe_file static.  Also we
can drop linux/proc_fs.h inclusion in fs/exec.c and kernel/fork.c.

Signed-off-by: Jiri Slaby 
Cc: Alexander Viro 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Merge git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/linux-2.6-nsfd

2011-05-26T01:10:16+00:00

* git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/linux-2.6-nsfd:
  net: fix get_net_ns_by_fd for !CONFIG_NET_NS
  ns proc: Return -ENOENT for a nonexistent /proc/self/ns/ entry.
  ns: Declare sys_setns in syscalls.h
  net: Allow setting the network namespace by fd
  ns proc: Add support for the ipc namespace
  ns proc: Add support for the uts namespace
  ns proc: Add support for the network namespace.
  ns: Introduce the setns syscall
  ns: proc files for namespace naming policy.

proc: make struct proc_maps_private truly private

2011-05-25T15:39:35+00:00

Now that mm/mempolicy.c is no longer implementing /proc/pid/numa_maps
there is no need to export struct proc_maps_private to the world.  Move it
to fs/proc/internal.h instead.

Signed-off-by: Stephen Wilson 
Reviewed-by: KOSAKI Motohiro 
Cc: Hugh Dickins 
Cc: David Rientjes 
Cc: Lee Schermerhorn 
Cc: Alexey Dobriyan 
Cc: Christoph Lameter 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

procfs: add stub for proc_mkdir_mode()

2011-05-18T09:55:24+00:00

Provide a stub for proc_mkdir_mode() when CONFIG_PROC_FS is not
enabled, just like the stub for proc_mkdir().

Fixes this linux-next build error:

  drivers/net/wireless/airo.c:4504: error: implicit declaration of function 'proc_mkdir_mode'

Signed-off-by: Randy Dunlap 
Cc: Stephen Rothwell 
Cc: Alexey Dobriyan 
Cc: "John W. Linville" 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

ns proc: Add support for the ipc namespace

2011-05-10T21:35:47+00:00

Acked-by: Daniel Lezcano 
Signed-off-by: Eric W. Biederman

ns proc: Add support for the uts namespace

2011-05-10T21:35:35+00:00

Acked-by: Daniel Lezcano 
Signed-off-by: Eric W. Biederman

ns proc: Add support for the network namespace.

2011-05-10T21:34:26+00:00

Implementing file descriptors for the network namespace
is simple and straight forward.

Acked-by: David S. Miller 
Acked-by: Daniel Lezcano 
Signed-off-by: Eric W. Biederman

ns: proc files for namespace naming policy.

2011-05-10T21:31:44+00:00

Create files under /proc//ns/ to allow controlling the
namespaces of a process.

This addresses three specific problems that can make namespaces hard to
work with.
- Namespaces require a dedicated process to pin them in memory.
- It is not possible to use a namespace unless you are the child
  of the original creator.
- Namespaces don't have names that userspace can use to talk about
  them.

The namespace files under /proc//ns/ can be opened and the
file descriptor can be used to talk about a specific namespace, and
to keep the specified namespace alive.

A namespace can be kept alive by either holding the file descriptor
open or bind mounting the file someplace else.  aka:
mount --bind /proc/self/ns/net /some/filesystem/path
mount --bind /proc/self/fd/ /some/filesystem/path

This allows namespaces to be named with userspace policy.

It requires additional support to make use of these filedescriptors
and that will be comming in the following patches.

Acked-by: Daniel Lezcano 
Signed-off-by: Eric W. Biederman

proc: make struct proc_dir_entry::namelen unsigned int

2011-03-24T02:46:37+00:00

1. namelen is declared "unsigned short" which hints for "maybe space savings".
   Indeed in 2.4 struct proc_dir_entry looked like:

        struct proc_dir_entry {
                unsigned short low_ino;
                unsigned short namelen;

   Now, low_ino is "unsigned int", all savings were gone for a long time.
   "struct proc_dir_entry" is not that countless to worry about it's size,
   anyway.

2. converting from unsigned short to int/unsigned int can only create
   problems, we better play it safe.

Space is not really conserved, because of natural alignment for the next
field.  sizeof(struct proc_dir_entry) remains the same.

Signed-off-by: Alexey Dobriyan 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

kcore: register vmemmap range

2009-09-23T14:39:41+00:00

Benjamin Herrenschmidt  pointed out that vmemmap
range is not included in KCORE_RAM, KCORE_VMALLOC ....

This adds KCORE_VMEMMAP if SPARSEMEM_VMEMMAP is used.  By this, vmemmap
can be readable via /proc/kcore

Because it's not vmalloc area, vread/vwrite cannot be used.  But the range
is static against the memory layout, this patch handles vmemmap area by
the same scheme with physical memory.

This patch assumes SPARSEMEM_VMEMMAP range is not in VMALLOC range.  It's
correct now.

[akpm@linux-foundation.org: fix typo]
Signed-off-by: KAMEZAWA Hiroyuki 
Cc: Jiri Slaby 
Cc: Ralf Baechle 
Cc: Benjamin Herrenschmidt 
Cc: WANG Cong 
Cc: Benjamin Herrenschmidt 
Cc: Randy Dunlap 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds