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-rw-r--r--ipc/util.h12
1 files changed, 12 insertions, 0 deletions
diff --git a/ipc/util.h b/ipc/util.h
index 51853dc2f340..acc5159e96d0 100644
--- a/ipc/util.h
+++ b/ipc/util.h
@@ -15,6 +15,7 @@
#include <linux/err.h>
#include <linux/ipc_namespace.h>
+#define IPCMNI 32768 /* <= MAX_INT limit for ipc arrays (including sysctl changes) */
#define SEQ_MULTIPLIER (IPCMNI)
int sem_init(void);
@@ -22,6 +23,7 @@ int msg_init(void);
void shm_init(void);
struct ipc_namespace;
+struct pid_namespace;
#ifdef CONFIG_POSIX_MQUEUE
extern void mq_clear_sbinfo(struct ipc_namespace *ns);
@@ -85,6 +87,7 @@ int ipc_init_ids(struct ipc_ids *);
#ifdef CONFIG_PROC_FS
void __init ipc_init_proc_interface(const char *path, const char *header,
int ids, int (*show)(struct seq_file *, void *));
+struct pid_namespace *ipc_seq_pid_ns(struct seq_file *);
#else
#define ipc_init_proc_interface(path, header, ids, show) do {} while (0)
#endif
@@ -149,6 +152,15 @@ struct kern_ipc_perm *ipcctl_pre_down_nolock(struct ipc_namespace *ns,
struct ipc_ids *ids, int id, int cmd,
struct ipc64_perm *perm, int extra_perm);
+static inline void ipc_update_pid(struct pid **pos, struct pid *pid)
+{
+ struct pid *old = *pos;
+ if (old != pid) {
+ *pos = get_pid(pid);
+ put_pid(old);
+ }
+}
+
#ifndef CONFIG_ARCH_WANT_IPC_PARSE_VERSION
/* On IA-64, we always use the "64-bit version" of the IPC structures. */
# define ipc_parse_version(cmd) IPC_64