112 lines
2.0 KiB
C
112 lines
2.0 KiB
C
/**
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* \file shm.h
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* License details are found in the file LICENSE.
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* \brief
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* header file for System V shared memory
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* \author Gou Nakamura <go.nakamura.yw@hitachi-solutions.com> \par
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* Copyright (C) 2014 - 2015 RIKEN AICS
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*/
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/*
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* HISTORY:
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*/
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#ifndef HEADER_SHM_H
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#define HEADER_SHM_H
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#include <list.h>
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#include <memobj.h>
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#include <arch/shm.h>
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enum {
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/* for key_t */
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IPC_PRIVATE = 0,
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/* for shmflg */
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IPC_CREAT = 01000,
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IPC_EXCL = 02000,
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SHM_HUGETLB = 04000,
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SHM_RDONLY = 010000,
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SHM_RND = 020000,
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SHM_REMAP = 040000,
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SHM_EXEC = 0100000,
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/* for shm_mode */
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SHM_DEST = 01000,
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SHM_LOCKED = 02000,
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/* for cmd of shmctl() */
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IPC_RMID = 0,
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IPC_SET = 1,
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IPC_STAT = 2,
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IPC_INFO = 3,
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SHM_LOCK = 11,
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SHM_UNLOCK = 12,
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SHM_STAT = 13,
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SHM_INFO = 14,
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};
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struct shmlock_user;
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struct shmobj {
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struct memobj memobj; /* must be first */
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int index;
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int pgshift;
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size_t real_segsz;
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struct shmlock_user * user;
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struct shmid_ds ds;
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struct list_head page_list;
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struct list_head chain; /* shmobj_list */
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};
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struct shminfo {
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uint64_t shmmax;
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uint64_t shmmin;
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uint64_t shmmni;
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uint64_t shmseg;
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uint64_t shmall;
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uint8_t padding[32];
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};
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struct shm_info {
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int32_t used_ids;
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uint8_t padding[4];
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uint64_t shm_tot;
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uint64_t shm_rss;
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uint64_t shm_swp;
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uint64_t swap_attempts;
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uint64_t swap_successes;
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};
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struct shmlock_user {
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uid_t ruid;
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int padding;
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size_t locked;
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struct list_head chain;
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};
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extern ihk_spinlock_t shmlock_users_lock_body;
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static inline void shmlock_users_lock(void)
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{
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ihk_mc_spinlock_lock_noirq(&shmlock_users_lock_body);
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return;
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}
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static inline void shmlock_users_unlock(void)
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{
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ihk_mc_spinlock_unlock_noirq(&shmlock_users_lock_body);
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return;
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}
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void shmobj_list_lock(void);
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void shmobj_list_unlock(void);
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int shmobj_create_indexed(struct shmid_ds *ds, struct shmobj **objp);
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void shmobj_destroy(struct shmobj *obj);
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void shmlock_user_free(struct shmlock_user *user);
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int shmlock_user_get(uid_t ruid, struct shmlock_user **userp);
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#endif /* HEADER_SHM_H */
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