Lines Matching +full:ipc +full:- +full:3

1 /* SPDX-License-Identifier: GPL-2.0 */
3  * linux/ipc/util.h
6  * ipc helper functions (c) 1999 Manfred Spraul <manfred@colorfullife.com>
19  * The IPC ID contains 2 separate numbers - index and sequence number.
21  *   bits  0-14: index (32k, 15 bits)
22  *   bits 15-30: sequence number (64k, 16 bits)
25  *   bits  0-23: index (16M, 24 bits)
26  *   bits 24-30: sequence number (128, 7 bits)
40 #define IPCMNI_IDX_MASK		((1 << ipc_mni_shift) - 1)
47 #define IPCMNI_IDX_MASK		((1 << IPCMNI_SHIFT) - 1)
84  * Structure that holds the parameters needed by the ipc operations
97  * Structure that holds some ipc operations. This structure is used to unify
99  *      . routine to call to create a new ipc object. Can be one of newque,
101  *      . routine to call to check permissions for a new ipc object.
132 /* must be called with ids->rwsem acquired for writing */
145  * ipc_get_maxidx - get the highest assigned index
146  * @ids: ipc identifier set
155 	if (ids->in_use == 0)  in ipc_get_maxidx()
156 		return -1;  in ipc_get_maxidx()
158 	if (ids->in_use == ipc_mni)  in ipc_get_maxidx()
159 		return ipc_mni - 1;  in ipc_get_maxidx()
161 	return ids->max_idx;  in ipc_get_maxidx()
206 	return ipcid_to_seqx(id) != ipcp->seq;  in ipc_checkid()
211 	spin_lock(&perm->lock);  in ipc_lock_object()
216 	spin_unlock(&perm->lock);  in ipc_unlock_object()
221 	assert_spin_locked(&perm->lock);  in ipc_assert_locked_object()
231  * ipc_valid_object() - helper to sort out IPC_RMID races for codepaths
233  * Checks whether the ipc object is still around or if it's gone already, as
234  * ipc_rmid() may have already freed the ID while the ipc lock was spinning.
235  * Needs to be called with kern_ipc_perm.lock held -- exception made for one
240 	return !perm->deleted;  in ipc_valid_object()
254 	return ((ns->sem_ctls[3] < 0) || (ns->sem_ctls[3] > ipc_mni))  in sem_check_semmni()
255 		? -ERANGE : 0;  in sem_check_semmni()