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implement System V shared memory for LTP syscalls

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NAKAMURA Gou
2015-03-11 11:18:17 +09:00
parent f5d935b703
commit 4698bc40c2
7 changed files with 842 additions and 79 deletions
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89
kernel/include/shm.h
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@@ -12,38 +12,71 @@
#ifndef HEADER_SHM_H
#define HEADER_SHM_H
/* begin types.h */
typedef int32_t key_t;
typedef uint32_t uid_t;
typedef uint32_t gid_t;
typedef int64_t time_t;
typedef int32_t pid_t;
/* end types.h */
#include <list.h>
#include <memobj.h>
#include <arch/shm.h>
typedef uint64_t shmatt_t;
enum {
/* for key_t */
IPC_PRIVATE = 0,
struct ipc_perm {
key_t key;
uid_t uid;
gid_t gid;
uid_t cuid;
gid_t cgid;
uint16_t mode;
uint8_t padding[2];
uint16_t seq;
uint8_t padding2[22];
/* for shmflg */
IPC_CREAT = 01000,
IPC_EXCL = 02000,
SHM_RDONLY = 010000,
SHM_RND = 020000,
SHM_REMAP = 040000,
SHM_EXEC = 0100000,
/* for shm_mode */
SHM_DEST = 01000,
SHM_LOCKED = 02000,
/* for cmd of shmctl() */
IPC_RMID = 0,
IPC_SET = 1,
IPC_STAT = 2,
IPC_INFO = 3,
SHM_LOCK = 11,
SHM_UNLOCK = 12,
SHM_STAT = 13,
SHM_INFO = 14,
};
struct shmid_ds {
struct ipc_perm shm_perm;
size_t shm_segsz;
time_t shm_atime;
time_t shm_dtime;
time_t shm_ctime;
pid_t shm_cpid;
pid_t shm_lpid;
shmatt_t shm_nattch;
uint8_t padding[16];
struct shmobj {
struct memobj memobj; /* must be first */
int index;
uint8_t padding[4];
size_t real_segsz;
struct shmid_ds ds;
struct list_head page_list;
struct list_head chain; /* shmobj_list */
};
struct shminfo {
uint64_t shmmax;
uint64_t shmmin;
uint64_t shmmni;
uint64_t shmseg;
uint64_t shmall;
uint8_t padding[32];
};
struct shm_info {
int32_t used_ids;
uint8_t padding[4];
uint64_t shm_tot;
uint64_t shm_rss;
uint64_t shm_swp;
uint64_t swap_attempts;
uint64_t swap_successes;
};
void shmobj_list_lock(void);
void shmobj_list_unlock(void);
int shmobj_create_indexed(struct shmid_ds *ds, struct shmobj **objp);
void shmobj_destroy(struct shmobj *obj);
#endif /* HEADER_SHM_H */