acrn-kernel/lib
Eric W. Biederman b592fcfe7f sysfs: Shadow directory support
The problem.  When implementing a network namespace I need to be able
to have multiple network devices with the same name.  Currently this
is a problem for /sys/class/net/*. 

What I want is a separate /sys/class/net directory in sysfs for each
network namespace, and I want to name each of them /sys/class/net.

I looked and the VFS actually allows that.  All that is needed is
for /sys/class/net to implement a follow link method to redirect
lookups to the real directory you want. 

Implementing a follow link method that is sensitive to the current
network namespace turns out to be 3 lines of code so it looks like a
clean approach.  Modifying sysfs so it doesn't get in my was is a bit
trickier. 

I am calling the concept of multiple directories all at the same path
in the filesystem shadow directories.  With the directory entry really
at that location the shadow master. 

The following patch modifies sysfs so it can handle a directory
structure slightly different from the kobject tree so I can implement
the shadow directories for handling /sys/class/net/.

Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Cc: Maneesh Soni <maneesh@in.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-02-07 10:37:14 -08:00
..
reed_solomon
zlib_deflate
zlib_inflate
.gitignore
Kconfig [PATCH] uml problems with linux/io.h 2006-12-13 09:05:52 -08:00
Kconfig.debug Remove stack unwinder for now 2006-12-15 08:47:51 -08:00
Makefile [PATCH] uml problems with linux/io.h 2006-12-13 09:05:52 -08:00
audit.c
bitmap.c
bitrev.c [PATCH] add MODULE_* attributes to bit reversal library 2006-12-10 10:07:52 -08:00
bug.c [PATCH] Generic BUG implementation 2006-12-08 08:28:39 -08:00
bust_spinlocks.c
cmdline.c [PATCH] get_options to allow a hypenated range for isolcpus 2006-12-07 08:39:35 -08:00
cpumask.c
crc-ccitt.c
crc16.c
crc32.c [PATCH] crc32: replace bitreverse by bitrev32 2006-12-08 08:28:39 -08:00
crc32defs.h
ctype.c
debug_locks.c
dec_and_lock.c
div64.c
dump_stack.c
extable.c
fault-inject.c Remove stack unwinder for now 2006-12-15 08:47:51 -08:00
find_next_bit.c
gen_crc32table.c
genalloc.c
halfmd4.c
hweight.c
idr.c [PATCH] slab: remove kmem_cache_t 2006-12-07 08:39:25 -08:00
inflate.c
int_sqrt.c
iomap.c [PATCH] Arch provides generic iomap missing accessors 2006-12-04 15:59:52 +11:00
iomap_copy.c
ioremap.c [PATCH] uml problems with linux/io.h 2006-12-13 09:05:52 -08:00
irq_regs.c
kernel_lock.c
klist.c
kobject.c sysfs: Shadow directory support 2007-02-07 10:37:14 -08:00
kobject_uevent.c kobject: kobject_uevent() returns manageable value 2006-12-20 10:56:44 -08:00
kref.c kref refcnt and false positives 2006-12-20 10:56:43 -08:00
libcrc32c.c
list_debug.c [PATCH] More list debugging context 2006-12-07 08:39:35 -08:00
locking-selftest-hardirq.h
locking-selftest-mutex.h
locking-selftest-rlock-hardirq.h
locking-selftest-rlock-softirq.h
locking-selftest-rlock.h
locking-selftest-rsem.h
locking-selftest-softirq.h
locking-selftest-spin-hardirq.h
locking-selftest-spin-softirq.h
locking-selftest-spin.h
locking-selftest-wlock-hardirq.h
locking-selftest-wlock-softirq.h
locking-selftest-wlock.h
locking-selftest-wsem.h
locking-selftest.c [PATCH] lockdep: show more details about self-test failures 2006-12-07 08:39:43 -08:00
parser.c
percpu_counter.c
plist.c
prio_tree.c
radix-tree.c [PATCH] hotplug CPU: clean up hotcpu_notifier() use 2006-12-07 08:39:39 -08:00
random32.c [PATCH] severing module.h->sched.h 2006-12-04 02:00:22 -05:00
rbtree.c
reciprocal_div.c [PATCH] SLAB: use a multiply instead of a divide in obj_to_index() 2006-12-13 09:05:49 -08:00
rwsem-spinlock.c
rwsem.c
semaphore-sleepers.c
sha1.c
smp_processor_id.c
sort.c
spinlock_debug.c [PATCH] x86: all cpu backtrace 2006-12-07 02:14:01 +01:00
string.c [PATCH] strstrip remove last blank fix 2006-10-28 11:30:54 -07:00
swiotlb.c [IA64] swiotlb abstraction (e.g. for Xen) 2007-02-05 18:53:04 -08:00
textsearch.c Fix typos in doc and comments 2006-11-30 05:32:19 +01:00
ts_bm.c
ts_fsm.c
ts_kmp.c
vsprintf.c