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authorSerge E. Hallyn <serue@us.ibm.com>2009-04-06 19:01:08 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2009-04-07 08:31:09 -0700
commit614b84cf4e4a920d2af32b8f147ea1e3b8c27ea6 (patch)
tree52478e38cd400042bd89f123c4101c95943ae492 /include/linux/ipc_namespace.h
parent909e6d94795654040ed416ac69858d5d2ce66dd3 (diff)
namespaces: mqueue ns: move mqueue_mnt into struct ipc_namespace
Move mqueue vfsmount plus a few tunables into the ipc_namespace struct. The CONFIG_IPC_NS boolean and the ipc_namespace struct will serve both the posix message queue namespaces and the SYSV ipc namespaces. The sysctl code will be fixed separately in patch 3. After just this patch, making a change to posix mqueue tunables always changes the values in the initial ipc namespace. Signed-off-by: Cedric Le Goater <clg@fr.ibm.com> Signed-off-by: Serge E. Hallyn <serue@us.ibm.com> Cc: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/ipc_namespace.h')
-rw-r--r--include/linux/ipc_namespace.h39
1 files changed, 35 insertions, 4 deletions
diff --git a/include/linux/ipc_namespace.h b/include/linux/ipc_namespace.h
index ea330f9e710..3e6fcacebe8 100644
--- a/include/linux/ipc_namespace.h
+++ b/include/linux/ipc_namespace.h
@@ -44,24 +44,55 @@ struct ipc_namespace {
int shm_tot;
struct notifier_block ipcns_nb;
+
+ /* The kern_mount of the mqueuefs sb. We take a ref on it */
+ struct vfsmount *mq_mnt;
+
+ /* # queues in this ns, protected by mq_lock */
+ unsigned int mq_queues_count;
+
+ /* next fields are set through sysctl */
+ unsigned int mq_queues_max; /* initialized to DFLT_QUEUESMAX */
+ unsigned int mq_msg_max; /* initialized to DFLT_MSGMAX */
+ unsigned int mq_msgsize_max; /* initialized to DFLT_MSGSIZEMAX */
+
};
extern struct ipc_namespace init_ipc_ns;
extern atomic_t nr_ipc_ns;
-#ifdef CONFIG_SYSVIPC
+#if defined(CONFIG_POSIX_MQUEUE) || defined(CONFIG_SYSVIPC)
#define INIT_IPC_NS(ns) .ns = &init_ipc_ns,
+#else
+#define INIT_IPC_NS(ns)
+#endif
+#ifdef CONFIG_SYSVIPC
extern int register_ipcns_notifier(struct ipc_namespace *);
extern int cond_register_ipcns_notifier(struct ipc_namespace *);
extern void unregister_ipcns_notifier(struct ipc_namespace *);
extern int ipcns_notify(unsigned long);
-
#else /* CONFIG_SYSVIPC */
-#define INIT_IPC_NS(ns)
+static inline int register_ipcns_notifier(struct ipc_namespace *ns)
+{ return 0; }
+static inline int cond_register_ipcns_notifier(struct ipc_namespace *ns)
+{ return 0; }
+static inline void unregister_ipcns_notifier(struct ipc_namespace *ns) { }
+static inline int ipcns_notify(unsigned long l) { return 0; }
#endif /* CONFIG_SYSVIPC */
-#if defined(CONFIG_SYSVIPC) && defined(CONFIG_IPC_NS)
+#ifdef CONFIG_POSIX_MQUEUE
+extern void mq_init_ns(struct ipc_namespace *ns);
+/* default values */
+#define DFLT_QUEUESMAX 256 /* max number of message queues */
+#define DFLT_MSGMAX 10 /* max number of messages in each queue */
+#define HARD_MSGMAX (131072/sizeof(void *))
+#define DFLT_MSGSIZEMAX 8192 /* max message size */
+#else
+#define mq_init_ns(ns) ((void) 0)
+#endif
+
+#if defined(CONFIG_IPC_NS)
extern void free_ipc_ns(struct kref *kref);
extern struct ipc_namespace *copy_ipcs(unsigned long flags,
struct ipc_namespace *ns);