linux/fs/proc
Eric W. Biederman 98f842e675 proc: Usable inode numbers for the namespace file descriptors.
Assign a unique proc inode to each namespace, and use that
inode number to ensure we only allocate at most one proc
inode for every namespace in proc.

A single proc inode per namespace allows userspace to test
to see if two processes are in the same namespace.

This has been a long requested feature and only blocked because
a naive implementation would put the id in a global space and
would ultimately require having a namespace for the names of
namespaces, making migration and certain virtualization tricks
impossible.

We still don't have per superblock inode numbers for proc, which
appears necessary for application unaware checkpoint/restart and
migrations (if the application is using namespace file descriptors)
but that is now allowd by the design if it becomes important.

I have preallocated the ipc and uts initial proc inode numbers so
their structures can be statically initialized.

Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2012-11-20 04:19:49 -08:00
..
array.c procfs: Print task uids and gids in the userns that opened the proc file 2012-11-20 04:18:15 -08:00
base.c pidns: Make the pidns proc mount/umount logic obvious. 2012-11-19 05:59:10 -08:00
cmdline.c
consoles.c
cpuinfo.c
devices.c
fd.c
fd.h
generic.c proc: Generalize proc inode allocation 2012-11-20 04:19:19 -08:00
inode.c proc: Fix the namespace inode permission checks. 2012-11-20 04:19:48 -08:00
internal.h procfs: Use the proc generic infrastructure for proc/self. 2012-11-19 03:09:34 -08:00
interrupts.c
Kconfig
kcore.c
kmsg.c
loadavg.c
Makefile procfs: Use the proc generic infrastructure for proc/self. 2012-11-19 03:09:34 -08:00
meminfo.c
mmu.c
namespaces.c proc: Usable inode numbers for the namespace file descriptors. 2012-11-20 04:19:49 -08:00
nommu.c
page.c kpageflags: fix wrong KPF_THP on non-huge compound pages 2012-10-09 16:23:00 +09:00
proc_devtree.c
proc_net.c
proc_sysctl.c rbtree: fix incorrect rbtree node insertion in fs/proc/proc_sysctl.c 2012-10-09 16:22:32 +09:00
proc_tty.c
root.c userns: Allow unprivilged mounts of proc and sysfs 2012-11-20 04:19:18 -08:00
self.c procfs: Use the proc generic infrastructure for proc/self. 2012-11-19 03:09:34 -08:00
softirqs.c
stat.c nohz: Fix idle ticks in cpu summary line of /proc/stat 2012-10-10 14:05:21 +02:00
task_mmu.c hold task->mempolicy while numa_maps scans. 2012-10-19 14:32:10 -07:00
task_nommu.c
uptime.c
version.c
vmcore.c