1 files changed, 108 insertions, 0 deletions

diff --git a/include/linux/shm.h b/include/linux/shm.h
new file mode 100644
index 000000000000..80113a1f60bc
--- /dev/null
+++ b/include/linux/shm.h
@@ -0,0 +1,108 @@
+#ifndef _LINUX_SHM_H_
+#define _LINUX_SHM_H_
+
+#include <linux/ipc.h>
+#include <linux/errno.h>
+#include <asm/page.h>
+
+/*
+ * SHMMAX, SHMMNI and SHMALL are upper limits are defaults which can
+ * be increased by sysctl
+ */
+
+#define SHMMAX 0x2000000                 /* max shared seg size (bytes) */
+#define SHMMIN 1                         /* min shared seg size (bytes) */
+#define SHMMNI 4096                      /* max num of segs system wide */
+#define SHMALL (SHMMAX/PAGE_SIZE*(SHMMNI/16)) /* max shm system wide (pages) */
+#define SHMSEG SHMMNI                    /* max shared segs per process */
+
+#include <asm/shmparam.h>
+
+/* Obsolete, used only for backwards compatibility and libc5 compiles */
+struct shmid_ds {
+        struct ipc_perm         shm_perm;       /* operation perms */
+        int                     shm_segsz;      /* size of segment (bytes) */
+        __kernel_time_t         shm_atime;      /* last attach time */
+        __kernel_time_t         shm_dtime;      /* last detach time */
+        __kernel_time_t         shm_ctime;      /* last change time */
+        __kernel_ipc_pid_t      shm_cpid;       /* pid of creator */
+        __kernel_ipc_pid_t      shm_lpid;       /* pid of last operator */
+        unsigned short          shm_nattch;     /* no. of current attaches */
+        unsigned short          shm_unused;     /* compatibility */
+        void                    *shm_unused2;   /* ditto - used by DIPC */
+        void                    *shm_unused3;   /* unused */
+};
+
+/* Include the definition of shmid64_ds and shminfo64 */
+#include <asm/shmbuf.h>
+
+/* permission flag for shmget */
+#define SHM_R           0400    /* or S_IRUGO from <linux/stat.h> */
+#define SHM_W           0200    /* or S_IWUGO from <linux/stat.h> */
+
+/* mode for attach */
+#define SHM_RDONLY      010000  /* read-only access */
+#define SHM_RND         020000  /* round attach address to SHMLBA boundary */
+#define SHM_REMAP       040000  /* take-over region on attach */
+#define SHM_EXEC        0100000 /* execution access */
+
+/* super user shmctl commands */
+#define SHM_LOCK        11
+#define SHM_UNLOCK      12
+
+/* ipcs ctl commands */
+#define SHM_STAT        13
+#define SHM_INFO        14
+
+/* Obsolete, used only for backwards compatibility */
+struct  shminfo {
+        int shmmax;
+        int shmmin;
+        int shmmni;
+        int shmseg;
+        int shmall;
+};
+
+struct shm_info {
+        int used_ids;
+        unsigned long shm_tot;  /* total allocated shm */
+        unsigned long shm_rss;  /* total resident shm */
+        unsigned long shm_swp;  /* total swapped shm */
+        unsigned long swap_attempts;
+        unsigned long swap_successes;
+};
+
+#ifdef __KERNEL__
+struct shmid_kernel /* private to the kernel */
+{       
+        struct kern_ipc_perm    shm_perm;
+        struct file *           shm_file;
+        int                     id;
+        unsigned long           shm_nattch;
+        unsigned long           shm_segsz;
+        time_t                  shm_atim;
+        time_t                  shm_dtim;
+        time_t                  shm_ctim;
+        pid_t                   shm_cprid;
+        pid_t                   shm_lprid;
+        struct user_struct      *mlock_user;
+};
+
+/* shm_mode upper byte flags */
+#define SHM_DEST        01000   /* segment will be destroyed on last detach */
+#define SHM_LOCKED      02000   /* segment will not be swapped */
+#define SHM_HUGETLB     04000   /* segment will use huge TLB pages */
+
+#ifdef CONFIG_SYSVIPC
+long do_shmat(int shmid, char __user *shmaddr, int shmflg, unsigned long *addr);
+#else
+static inline long do_shmat(int shmid, char __user *shmaddr,
+                                int shmflg, unsigned long *addr)
+{
+        return -ENOSYS;
+}
+#endif
+
+#endif /* __KERNEL__ */
+
+#endif /* _LINUX_SHM_H_ */