(2006-08-06) rescue-bootcd

extra/linux-2.6.10/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_ */