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author | Linus Torvalds <torvalds@linux-foundation.org> | 2011-05-26 01:10:16 (GMT) |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-05-26 01:10:16 (GMT) |
commit | 14d74e0cab7a7779a7ff0c3863c04c8a8e507106 (patch) | |
tree | 5e27d7495f8f7ce178b637d588ec42bd7b4173d8 /ipc/namespace.c | |
parent | 49a78d085fa6b44d6ed791923c7172a6433589c2 (diff) | |
parent | 956c920786694f51601a0ef7ee12956fd6aa216e (diff) | |
download | linux-14d74e0cab7a7779a7ff0c3863c04c8a8e507106.tar.xz |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/linux-2.6-nsfd
* git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/linux-2.6-nsfd:
net: fix get_net_ns_by_fd for !CONFIG_NET_NS
ns proc: Return -ENOENT for a nonexistent /proc/self/ns/ entry.
ns: Declare sys_setns in syscalls.h
net: Allow setting the network namespace by fd
ns proc: Add support for the ipc namespace
ns proc: Add support for the uts namespace
ns proc: Add support for the network namespace.
ns: Introduce the setns syscall
ns: proc files for namespace naming policy.
Diffstat (limited to 'ipc/namespace.c')
-rw-r--r-- | ipc/namespace.c | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/ipc/namespace.c b/ipc/namespace.c index 8054c8e..ce0a647 100644 --- a/ipc/namespace.c +++ b/ipc/namespace.c @@ -12,6 +12,7 @@ #include <linux/fs.h> #include <linux/mount.h> #include <linux/user_namespace.h> +#include <linux/proc_fs.h> #include "util.h" @@ -140,3 +141,39 @@ void put_ipc_ns(struct ipc_namespace *ns) free_ipc_ns(ns); } } + +static void *ipcns_get(struct task_struct *task) +{ + struct ipc_namespace *ns = NULL; + struct nsproxy *nsproxy; + + rcu_read_lock(); + nsproxy = task_nsproxy(task); + if (nsproxy) + ns = get_ipc_ns(nsproxy->ipc_ns); + rcu_read_unlock(); + + return ns; +} + +static void ipcns_put(void *ns) +{ + return put_ipc_ns(ns); +} + +static int ipcns_install(struct nsproxy *nsproxy, void *ns) +{ + /* Ditch state from the old ipc namespace */ + exit_sem(current); + put_ipc_ns(nsproxy->ipc_ns); + nsproxy->ipc_ns = get_ipc_ns(ns); + return 0; +} + +const struct proc_ns_operations ipcns_operations = { + .name = "ipc", + .type = CLONE_NEWIPC, + .get = ipcns_get, + .put = ipcns_put, + .install = ipcns_install, +}; |