1 /* SPDX-License-Identifier: GPL-2.0 */
12 #include <linux/rhashtable-types.h>
55 	/* The kern_mount of the mqueuefs sb.  We take a ref on it */
58 	/* # queues in this ns, protected by mq_lock */
74 	/* user_ns which owns the ipc ns */
80 	struct ns_common ns;  member
87 extern void shm_destroy_orphaned(struct ipc_namespace *ns);
89 static inline void shm_destroy_orphaned(struct ipc_namespace *ns) {}  in shm_destroy_orphaned()  argument
93 extern int mq_init_ns(struct ipc_namespace *ns);
102  *   on CAP_SYS_RESOURCE apps as well making them inviolate (so make them
106  *   Per app minimum openable message queues - 8.  This does not map well
107  *     to the fact that we limit the number of queues on a per namespace
110  *   Minimum maximum for HARD_MSGMAX - 32767.  I bumped this to 65536.
111  *   Minimum maximum for HARD_MSGSIZEMAX - POSIX is silent on this.  However,
112  *     we have run into a situation where running applications in the wild
128 static inline int mq_init_ns(struct ipc_namespace *ns) { return 0; }  in mq_init_ns()  argument
133 	struct user_namespace *user_ns, struct ipc_namespace *ns);
135 static inline struct ipc_namespace *get_ipc_ns(struct ipc_namespace *ns)  in get_ipc_ns()  argument
137 	if (ns)  in get_ipc_ns()
138 		refcount_inc(&ns->ns.count);  in get_ipc_ns()
139 	return ns;  in get_ipc_ns()
142 static inline struct ipc_namespace *get_ipc_ns_not_zero(struct ipc_namespace *ns)  in get_ipc_ns_not_zero()  argument
144 	if (ns) {  in get_ipc_ns_not_zero()
145 		if (refcount_inc_not_zero(&ns->ns.count))  in get_ipc_ns_not_zero()
146 			return ns;  in get_ipc_ns_not_zero()
152 extern void put_ipc_ns(struct ipc_namespace *ns);
155 	struct user_namespace *user_ns, struct ipc_namespace *ns)  in copy_ipcs()  argument
158 		return ERR_PTR(-EINVAL);  in copy_ipcs()
160 	return ns;  in copy_ipcs()
163 static inline struct ipc_namespace *get_ipc_ns(struct ipc_namespace *ns)  in get_ipc_ns()  argument
165 	return ns;  in get_ipc_ns()
168 static inline struct ipc_namespace *get_ipc_ns_not_zero(struct ipc_namespace *ns)  in get_ipc_ns_not_zero()  argument
170 	return ns;  in get_ipc_ns_not_zero()
173 static inline void put_ipc_ns(struct ipc_namespace *ns)  in put_ipc_ns()  argument
180 void retire_mq_sysctls(struct ipc_namespace *ns);
181 bool setup_mq_sysctls(struct ipc_namespace *ns);
185 static inline void retire_mq_sysctls(struct ipc_namespace *ns)  in retire_mq_sysctls()  argument
189 static inline bool setup_mq_sysctls(struct ipc_namespace *ns)  in setup_mq_sysctls()  argument
198 bool setup_ipc_sysctls(struct ipc_namespace *ns);
199 void retire_ipc_sysctls(struct ipc_namespace *ns);
203 static inline void retire_ipc_sysctls(struct ipc_namespace *ns)  in retire_ipc_sysctls()  argument
207 static inline bool setup_ipc_sysctls(struct ipc_namespace *ns)  in setup_ipc_sysctls()  argument