Blame view
ipc/util.h
5.28 KB
1da177e4c Linux-2.6.12-rc2 |
1 2 3 4 |
/* * linux/ipc/util.h * Copyright (C) 1999 Christoph Rohland * |
624dffcbc correct email add... |
5 |
* ipc helper functions (c) 1999 Manfred Spraul <manfred@colorfullife.com> |
73ea41302 [PATCH] IPC names... |
6 7 |
* namespaces support. 2006 OpenVZ, SWsoft Inc. * Pavel Emelianov <xemul@openvz.org> |
1da177e4c Linux-2.6.12-rc2 |
8 9 10 11 |
*/ #ifndef _IPC_UTIL_H #define _IPC_UTIL_H |
232086b19 ipc: unbreak 32-b... |
12 |
#include <linux/unistd.h> |
023a53557 ipc: integrate ip... |
13 |
#include <linux/err.h> |
7ca7e564e ipc: store ipcs i... |
14 |
|
1da177e4c Linux-2.6.12-rc2 |
15 16 17 18 19 |
#define SEQ_MULTIPLIER (IPCMNI) void sem_init (void); void msg_init (void); void shm_init (void); |
ae5e1b22f namespaces: move ... |
20 |
struct ipc_namespace; |
614b84cf4 namespaces: mqueu... |
21 |
#ifdef CONFIG_POSIX_MQUEUE |
7eafd7c74 namespaces: ipc n... |
22 23 |
extern void mq_clear_sbinfo(struct ipc_namespace *ns); extern void mq_put_mnt(struct ipc_namespace *ns); |
614b84cf4 namespaces: mqueu... |
24 |
#else |
7eafd7c74 namespaces: ipc n... |
25 26 |
static inline void mq_clear_sbinfo(struct ipc_namespace *ns) { } static inline void mq_put_mnt(struct ipc_namespace *ns) { } |
614b84cf4 namespaces: mqueu... |
27 28 29 |
#endif #ifdef CONFIG_SYSVIPC |
ed2ddbf88 IPC: make struct ... |
30 31 32 |
void sem_init_ns(struct ipc_namespace *ns); void msg_init_ns(struct ipc_namespace *ns); void shm_init_ns(struct ipc_namespace *ns); |
73ea41302 [PATCH] IPC names... |
33 34 35 36 |
void sem_exit_ns(struct ipc_namespace *ns); void msg_exit_ns(struct ipc_namespace *ns); void shm_exit_ns(struct ipc_namespace *ns); |
614b84cf4 namespaces: mqueu... |
37 38 39 40 41 42 43 44 45 |
#else static inline void sem_init_ns(struct ipc_namespace *ns) { } static inline void msg_init_ns(struct ipc_namespace *ns) { } static inline void shm_init_ns(struct ipc_namespace *ns) { } static inline void sem_exit_ns(struct ipc_namespace *ns) { } static inline void msg_exit_ns(struct ipc_namespace *ns) { } static inline void shm_exit_ns(struct ipc_namespace *ns) { } #endif |
73ea41302 [PATCH] IPC names... |
46 |
|
7748dbfaa ipc: unify the sy... |
47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 |
/* * Structure that holds the parameters needed by the ipc operations * (see after) */ struct ipc_params { key_t key; int flg; union { size_t size; /* for shared memories */ int nsems; /* for semaphores */ } u; /* holds the getnew() specific param */ }; /* * Structure that holds some ipc operations. This structure is used to unify * the calls to sys_msgget(), sys_semget(), sys_shmget() * . routine to call to create a new ipc object. Can be one of newque, * newary, newseg |
f4566f048 ipc: fix wrong co... |
65 |
* . routine to call to check permissions for a new ipc object. |
7748dbfaa ipc: unify the sy... |
66 67 68 69 70 71 |
* Can be one of security_msg_associate, security_sem_associate, * security_shm_associate * . routine to call for an extra check if needed */ struct ipc_ops { int (*getnew) (struct ipc_namespace *, struct ipc_params *); |
03f02c765 Storing ipcs into... |
72 73 |
int (*associate) (struct kern_ipc_perm *, int); int (*more_checks) (struct kern_ipc_perm *, struct ipc_params *); |
7748dbfaa ipc: unify the sy... |
74 |
}; |
ae7817745 [PATCH] ipc: add ... |
75 |
struct seq_file; |
ed2ddbf88 IPC: make struct ... |
76 |
struct ipc_ids; |
7d69a1f4a remove CONFIG_UTS... |
77 |
|
7ca7e564e ipc: store ipcs i... |
78 |
void ipc_init_ids(struct ipc_ids *); |
ae7817745 [PATCH] ipc: add ... |
79 80 |
#ifdef CONFIG_PROC_FS void __init ipc_init_proc_interface(const char *path, const char *header, |
73ea41302 [PATCH] IPC names... |
81 |
int ids, int (*show)(struct seq_file *, void *)); |
ae7817745 [PATCH] ipc: add ... |
82 83 84 |
#else #define ipc_init_proc_interface(path, header, ids, show) do {} while (0) #endif |
1da177e4c Linux-2.6.12-rc2 |
85 |
|
73ea41302 [PATCH] IPC names... |
86 87 88 |
#define IPC_SEM_IDS 0 #define IPC_MSG_IDS 1 #define IPC_SHM_IDS 2 |
ce621f5ba ipc: introduce th... |
89 |
#define ipcid_to_idx(id) ((id) % SEQ_MULTIPLIER) |
3e148c799 fix idr_find() lo... |
90 |
/* must be called with ids->rw_mutex acquired for writing */ |
7ca7e564e ipc: store ipcs i... |
91 |
int ipc_addid(struct ipc_ids *, struct kern_ipc_perm *, int); |
3e148c799 fix idr_find() lo... |
92 93 |
/* must be called with ids->rw_mutex acquired for reading */ |
7ca7e564e ipc: store ipcs i... |
94 |
int ipc_get_maxid(struct ipc_ids *); |
1da177e4c Linux-2.6.12-rc2 |
95 96 |
/* must be called with both locks acquired. */ |
7ca7e564e ipc: store ipcs i... |
97 |
void ipc_rmid(struct ipc_ids *, struct kern_ipc_perm *); |
1da177e4c Linux-2.6.12-rc2 |
98 |
|
f4566f048 ipc: fix wrong co... |
99 |
/* must be called with ipcp locked */ |
b0e77598f userns: user name... |
100 |
int ipcperms(struct ipc_namespace *ns, struct kern_ipc_perm *ipcp, short flg); |
1da177e4c Linux-2.6.12-rc2 |
101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 |
/* for rare, potentially huge allocations. * both function can sleep */ void* ipc_alloc(int size); void ipc_free(void* ptr, int size); /* * For allocation that need to be freed by RCU. * Objects are reference counted, they start with reference count 1. * getref increases the refcount, the putref call that reduces the recount * to 0 schedules the rcu destruction. Caller must guarantee locking. */ void* ipc_rcu_alloc(int size); void ipc_rcu_getref(void *ptr); void ipc_rcu_putref(void *ptr); |
023a53557 ipc: integrate ip... |
117 |
struct kern_ipc_perm *ipc_lock(struct ipc_ids *, int); |
1da177e4c Linux-2.6.12-rc2 |
118 119 120 |
void kernel_to_ipc64_perm(struct kern_ipc_perm *in, struct ipc64_perm *out); void ipc64_perm_to_ipc_perm(struct ipc64_perm *in, struct ipc_perm *out); |
8f4a3809c IPC: introduce ip... |
121 |
void ipc_update_perm(struct ipc64_perm *in, struct kern_ipc_perm *out); |
b0e77598f userns: user name... |
122 123 |
struct kern_ipc_perm *ipcctl_pre_down(struct ipc_namespace *ns, struct ipc_ids *ids, int id, int cmd, |
a5f75e7f2 IPC: consolidate ... |
124 |
struct ipc64_perm *perm, int extra_perm); |
1da177e4c Linux-2.6.12-rc2 |
125 |
|
31a985fbb ipc: use __ARCH_W... |
126 |
#ifndef __ARCH_WANT_IPC_PARSE_VERSION |
1da177e4c Linux-2.6.12-rc2 |
127 128 129 130 131 132 133 134 135 |
/* On IA-64, we always use the "64-bit version" of the IPC structures. */ # define ipc_parse_version(cmd) IPC_64 #else int ipc_parse_version (int *cmd); #endif extern void free_msg(struct msg_msg *msg); extern struct msg_msg *load_msg(const void __user *src, int len); extern int store_msg(void __user *dest, struct msg_msg *msg, int len); |
7748dbfaa ipc: unify the sy... |
136 |
|
b6b337ad1 ipc: recompute ms... |
137 |
extern void recompute_msgmni(struct ipc_namespace *); |
1b531f213 ipc: remove unnee... |
138 |
static inline int ipc_buildid(int id, int seq) |
280283131 ipc: inline ipc_b... |
139 140 141 |
{ return SEQ_MULTIPLIER * seq + id; } |
f4566f048 ipc: fix wrong co... |
142 143 144 |
/* * Must be called with ipcp locked */ |
1b531f213 ipc: remove unnee... |
145 |
static inline int ipc_checkid(struct kern_ipc_perm *ipcp, int uid) |
023a53557 ipc: integrate ip... |
146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 |
{ if (uid / SEQ_MULTIPLIER != ipcp->seq) return 1; return 0; } static inline void ipc_lock_by_ptr(struct kern_ipc_perm *perm) { rcu_read_lock(); spin_lock(&perm->lock); } static inline void ipc_unlock(struct kern_ipc_perm *perm) { spin_unlock(&perm->lock); rcu_read_unlock(); } |
b2d75cddc ipc: uninline som... |
163 164 165 |
struct kern_ipc_perm *ipc_lock_check(struct ipc_ids *ids, int id); int ipcget(struct ipc_namespace *ns, struct ipc_ids *ids, struct ipc_ops *ops, struct ipc_params *params); |
665c7741f ipcns: move free_... |
166 167 |
void free_ipcs(struct ipc_namespace *ns, struct ipc_ids *ids, void (*free)(struct ipc_namespace *, struct kern_ipc_perm *)); |
1da177e4c Linux-2.6.12-rc2 |
168 |
#endif |