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Eric W. Biederman 077130c0cf [NET]: Fix race when opening a proc file while a network namespace is exiting. ... The problem: proc_net files remember which network namespace the are against but do not remember hold a reference count (as that would pin the network namespace). So we currently have a small window where the reference count on a network namespace may be incremented when opening a /proc file when it has already gone to zero. To fix this introduce maybe_get_net and get_proc_net. maybe_get_net increments the network namespace reference count only if it is greater then zero, ensuring we don't increment a reference count after it has gone to zero. get_proc_net handles all of the magic to go from a proc inode to the network namespace instance and call maybe_get_net on it. PROC_NET the old accessor is removed so that we don't get confused and use the wrong helper function. Then I fix up the callers to use get_proc_net and handle the case case where get_proc_net returns NULL. In that case I return -ENXIO because effectively the network namespace has already gone away so the files we are trying to access don't exist anymore. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Acked-by: Paul E. McKenney <paulmck@us.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>		18 years ago
..
Makefile	[NET]: Basic network namespace infrastructure.	18 years ago
datagram.c	[NET]: Do not dereference iov if length is zero	18 years ago
dev.c	[NET]: Fix race when opening a proc file while a network namespace is exiting.	18 years ago
dev_mcast.c	[NET]: Fix race when opening a proc file while a network namespace is exiting.	18 years ago
dst.c	[PATCH] NET : convert IP route cache garbage collection from softirq processing to a workqueue	18 years ago
ethtool.c	[NET]: Make the device list and device lookups per namespace.	18 years ago
fib_rules.c	[NET]: Make the device list and device lookups per namespace.	18 years ago
filter.c	[SK_BUFF]: Convert skb->tail to sk_buff_data_t	18 years ago
flow.c	mm: Remove slab destructors from kmem_cache_create().	18 years ago
gen_estimator.c	[NET]: gen_estimator deadlock fix	18 years ago
gen_stats.c	[SK_BUFF]: Convert skb->tail to sk_buff_data_t	18 years ago
iovec.c	[PATCH] remove many unneeded #includes of sched.h	18 years ago
kmap_skb.h	[PATCH] severing skbuff.h -> highmem.h	18 years ago
link_watch.c	[NET] link_watch: Always schedule urgent events	18 years ago
neighbour.c	[NET]: Make the device list and device lookups per namespace.	18 years ago
net-sysfs.c	[NET]: Make NAPI polling independent of struct net_device objects.	18 years ago
net_namespace.c	[NET]: #if 0 out net_alloc() for now.	18 years ago
netevent.c	[NET]: net/core/netevent.c should #include <net/netevent.h>	18 years ago
netpoll.c	[NET]: Make the device list and device lookups per namespace.	18 years ago
pktgen.c	[NET]: Make the device list and device lookups per namespace.	18 years ago
request_sock.c	[NET]: Size listen hash tables using backlog hint	18 years ago
rtnetlink.c	[NET]: netlink support for moving devices between network namespaces.	18 years ago
scm.c	O_CLOEXEC for SCM_RIGHTS	18 years ago
skbuff.c	mm: Remove slab destructors from kmem_cache_create().	18 years ago
sock.c	[NET]: Make the device list and device lookups per namespace.	18 years ago
stream.c	[NET] CORE: Fix whitespace errors.	18 years ago
sysctl_net_core.c	[XFRM]: Allow XFRM_ACQ_EXPIRES to be tunable via sysctl.	18 years ago
user_dma.c	[NET]: Revert sk_buff walker cleanups.	18 years ago
utils.c	[NET] net/core/utils: fix sparse warning	18 years ago