linux/fs/ecryptfs
Denis V. Lunev cd40b7d398 [NET]: make netlink user -> kernel interface synchronious
This patch make processing netlink user -> kernel messages synchronious.
This change was inspired by the talk with Alexey Kuznetsov about current
netlink messages processing. He says that he was badly wrong when introduced 
asynchronious user -> kernel communication.

The call netlink_unicast is the only path to send message to the kernel
netlink socket. But, unfortunately, it is also used to send data to the
user.

Before this change the user message has been attached to the socket queue
and sk->sk_data_ready was called. The process has been blocked until all
pending messages were processed. The bad thing is that this processing
may occur in the arbitrary process context.

This patch changes nlk->data_ready callback to get 1 skb and force packet
processing right in the netlink_unicast.

Kernel -> user path in netlink_unicast remains untouched.

EINTR processing for in netlink_run_queue was changed. It forces rtnl_lock
drop, but the process remains in the cycle until the message will be fully
processed. So, there is no need to use this kludges now.

Signed-off-by: Denis V. Lunev <den@openvz.org>
Acked-by: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-10 21:15:29 -07:00
..
crypto.c [PATCH] eCryptfs: open-code flag checking and manipulation 2007-02-12 09:48:37 -08:00
debug.c [PATCH] eCryptfs: open-code flag checking and manipulation 2007-02-12 09:48:37 -08:00
dentry.c [PATCH] eCryptfs: fix possible NULL ptr deref in ecryptfs_d_release() 2007-03-16 19:25:05 -07:00
ecryptfs_kernel.h eCryptfs: fix write zeros behavior 2007-06-28 11:34:53 -07:00
file.c sendfile: remove .sendfile from filesystems that use generic_file_sendfile() 2007-07-10 08:04:13 +02:00
inode.c revert "eCryptfs: fix lookup error for special files" 2007-08-31 01:42:22 -07:00
keystore.c [PATCH] eCryptfs: Reduce stack usage in ecryptfs_generate_key_packet_set() 2007-02-16 08:14:01 -08:00
main.c eCryptfs: fix error handling in ecryptfs_init 2007-08-11 15:47:40 -07:00
Makefile [PATCH] eCryptfs: Public key; packet management 2007-02-12 09:48:36 -08:00
messaging.c Detach sched.h from mm.h 2007-05-21 09:18:19 -07:00
mmap.c eCryptfs: fix possible fault in ecryptfs_sync_page 2007-08-31 01:42:23 -07:00
netlink.c [NET]: make netlink user -> kernel interface synchronious 2007-10-10 21:15:29 -07:00
super.c [PATCH] Mark struct super_operations const 2007-02-12 09:48:47 -08:00