2 * linux/ipc/namespace.c
3 * Copyright (C) 2006 Pavel Emelyanov <xemul@openvz.org> OpenVZ, SWsoft Inc.
8 #include <linux/ipc_namespace.h>
9 #include <linux/rcupdate.h>
10 #include <linux/nsproxy.h>
11 #include <linux/slab.h>
15 static struct ipc_namespace
*clone_ipc_ns(struct ipc_namespace
*old_ns
)
17 struct ipc_namespace
*ns
;
19 ns
= kmalloc(sizeof(struct ipc_namespace
), GFP_KERNEL
);
21 return ERR_PTR(-ENOMEM
);
23 atomic_inc(&nr_ipc_ns
);
33 struct ipc_namespace
*copy_ipcs(unsigned long flags
, struct ipc_namespace
*ns
)
35 struct ipc_namespace
*new_ns
;
40 if (!(flags
& CLONE_NEWIPC
))
43 new_ns
= clone_ipc_ns(ns
);
50 * free_ipcs - free all ipcs of one type
51 * @ns: the namespace to remove the ipcs from
52 * @ids: the table of ipcs to free
53 * @free: the function called to free each individual ipc
55 * Called for each kind of ipc when an ipc_namespace exits.
57 void free_ipcs(struct ipc_namespace
*ns
, struct ipc_ids
*ids
,
58 void (*free
)(struct ipc_namespace
*, struct kern_ipc_perm
*))
60 struct kern_ipc_perm
*perm
;
64 down_write(&ids
->rw_mutex
);
68 for (total
= 0, next_id
= 0; total
< in_use
; next_id
++) {
69 perm
= idr_find(&ids
->ipcs_idr
, next_id
);
72 ipc_lock_by_ptr(perm
);
76 up_write(&ids
->rw_mutex
);
79 void free_ipc_ns(struct kref
*kref
)
81 struct ipc_namespace
*ns
;
83 ns
= container_of(kref
, struct ipc_namespace
, kref
);
88 atomic_dec(&nr_ipc_ns
);
This page took 0.033576 seconds and 6 git commands to generate.