813e678364
This patch fixes some minor bugs introduced by the previous patch (remove old syscalls). Both patches remove the obsolete syscalls. The changes in this patch were suggested by Arnd Bergmann. The vmlinux.lds.S changes are required for the latest gcc/binutils. Signed-off-by: Chris Zankel <chris@zankel.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
82 lines
2.3 KiB
C
82 lines
2.3 KiB
C
/*
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* linux/ipc/util.h
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* Copyright (C) 1999 Christoph Rohland
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*
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* ipc helper functions (c) 1999 Manfred Spraul <manfreds@colorfullife.com>
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*/
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#ifndef _IPC_UTIL_H
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#define _IPC_UTIL_H
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#define USHRT_MAX 0xffff
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#define SEQ_MULTIPLIER (IPCMNI)
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void sem_init (void);
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void msg_init (void);
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void shm_init (void);
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struct ipc_id_ary {
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int size;
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struct kern_ipc_perm *p[0];
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};
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struct ipc_ids {
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int in_use;
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int max_id;
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unsigned short seq;
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unsigned short seq_max;
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struct semaphore sem;
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struct ipc_id_ary nullentry;
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struct ipc_id_ary* entries;
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};
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void __init ipc_init_ids(struct ipc_ids* ids, int size);
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/* must be called with ids->sem acquired.*/
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int ipc_findkey(struct ipc_ids* ids, key_t key);
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int ipc_addid(struct ipc_ids* ids, struct kern_ipc_perm* new, int size);
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/* must be called with both locks acquired. */
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struct kern_ipc_perm* ipc_rmid(struct ipc_ids* ids, int id);
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int ipcperms (struct kern_ipc_perm *ipcp, short flg);
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/* for rare, potentially huge allocations.
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* both function can sleep
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*/
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void* ipc_alloc(int size);
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void ipc_free(void* ptr, int size);
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/*
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* For allocation that need to be freed by RCU.
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* Objects are reference counted, they start with reference count 1.
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* getref increases the refcount, the putref call that reduces the recount
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* to 0 schedules the rcu destruction. Caller must guarantee locking.
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*/
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void* ipc_rcu_alloc(int size);
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void ipc_rcu_getref(void *ptr);
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void ipc_rcu_putref(void *ptr);
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struct kern_ipc_perm* ipc_get(struct ipc_ids* ids, int id);
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struct kern_ipc_perm* ipc_lock(struct ipc_ids* ids, int id);
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void ipc_lock_by_ptr(struct kern_ipc_perm *ipcp);
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void ipc_unlock(struct kern_ipc_perm* perm);
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int ipc_buildid(struct ipc_ids* ids, int id, int seq);
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int ipc_checkid(struct ipc_ids* ids, struct kern_ipc_perm* ipcp, int uid);
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void kernel_to_ipc64_perm(struct kern_ipc_perm *in, struct ipc64_perm *out);
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void ipc64_perm_to_ipc_perm(struct ipc64_perm *in, struct ipc_perm *out);
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#if defined(__ia64__) || defined(__x86_64__) || defined(__hppa__) || defined(__XTENSA__)
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/* On IA-64, we always use the "64-bit version" of the IPC structures. */
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# define ipc_parse_version(cmd) IPC_64
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#else
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int ipc_parse_version (int *cmd);
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#endif
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extern void free_msg(struct msg_msg *msg);
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extern struct msg_msg *load_msg(const void __user *src, int len);
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extern int store_msg(void __user *dest, struct msg_msg *msg, int len);
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#endif
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