aha/fs/afs
Alexey Dobriyan 99b7623380 proc 2/2: remove struct proc_dir_entry::owner
Setting ->owner as done currently (pde->owner = THIS_MODULE) is racy
as correctly noted at bug #12454. Someone can lookup entry with NULL
->owner, thus not pinning enything, and release it later resulting
in module refcount underflow.

We can keep ->owner and supply it at registration time like ->proc_fops
and ->data.

But this leaves ->owner as easy-manipulative field (just one C assignment)
and somebody will forget to unpin previous/pin current module when
switching ->owner. ->proc_fops is declared as "const" which should give
some thoughts.

->read_proc/->write_proc were just fixed to not require ->owner for
protection.

rmmod'ed directories will be empty and return "." and ".." -- no harm.
And directories with tricky enough readdir and lookup shouldn't be modular.
We definitely don't want such modular code.

Removing ->owner will also make PDE smaller.

So, let's nuke it.

Kudos to Jeff Layton for reminding about this, let's say, oversight.

http://bugzilla.kernel.org/show_bug.cgi?id=12454

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
2009-03-31 01:14:44 +04:00
..
afs.h
afs_cm.h
afs_fs.h
afs_vl.h
cache.c
cache.h
callback.c
cell.c
cmservice.c
dir.c constify dentry_operations: AFS 2009-03-27 14:44:00 -04:00
file.c afs: convert to new aops 2008-10-16 11:21:48 -07:00
flock.c
fsclient.c
inode.c
internal.h afs: convert to new aops 2008-10-16 11:21:48 -07:00
Kconfig fs/Kconfig: move afs out 2009-01-22 13:16:01 +03:00
main.c
Makefile
misc.c
mntpt.c [PATCH] pass struct path * to do_add_mount() 2008-08-01 11:25:32 -04:00
netdevices.c
proc.c proc 2/2: remove struct proc_dir_entry::owner 2009-03-31 01:14:44 +04:00
rxrpc.c
security.c [PATCH] sanitize ->permission() prototype 2008-07-26 20:53:14 -04:00
server.c fs: replace NIPQUAD() 2008-10-31 00:56:28 -07:00
super.c vfs: Use const for kernel parser table 2008-10-13 10:10:37 -07:00
vlclient.c
vlocation.c
vnode.c
volume.c
write.c fs: symlink write_begin allocation context fix 2009-01-04 13:33:20 -08:00