24  * Allow the fileserver to request callback state (re-)initialisation.
31 		server->cb_s_break++;  in afs_init_callback_state()
32 		server = rcu_dereference(server->uuid_next);  in afs_init_callback_state()
44 	clear_bit(AFS_VNODE_NEW_CONTENT, &vnode->flags);  in __afs_break_callback()
45 	if (test_and_clear_bit(AFS_VNODE_CB_PROMISED, &vnode->flags)) {  in __afs_break_callback()
46 		vnode->cb_break++;  in __afs_break_callback()
49 		if (vnode->lock_state == AFS_VNODE_LOCK_WAITING_FOR_CB)  in __afs_break_callback()
52 		trace_afs_cb_break(&vnode->fid, vnode->cb_break, reason, true);  in __afs_break_callback()
54 		trace_afs_cb_break(&vnode->fid, vnode->cb_break, reason, false);  in __afs_break_callback()
60 	write_seqlock(&vnode->cb_lock);  in afs_break_callback()
62 	write_sequnlock(&vnode->cb_lock);  in afs_break_callback()
68 static struct afs_volume *afs_lookup_volume_rcu(struct afs_cell *cell,  in afs_lookup_volume_rcu()  argument
81 		read_seqbegin_or_lock(&cell->volume_lock, &seq);  in afs_lookup_volume_rcu()
83 		p = rcu_dereference_raw(cell->volumes.rb_node);  in afs_lookup_volume_rcu()
87 			if (volume->vid < vid)  in afs_lookup_volume_rcu()
88 				p = rcu_dereference_raw(p->rb_left);  in afs_lookup_volume_rcu()
89 			else if (volume->vid > vid)  in afs_lookup_volume_rcu()
90 				p = rcu_dereference_raw(p->rb_right);  in afs_lookup_volume_rcu()
96 	} while (need_seqretry(&cell->volume_lock, seq));  in afs_lookup_volume_rcu()
98 	done_seqretry(&cell->volume_lock, seq);  in afs_lookup_volume_rcu()
104  * - happens when
105  *   - the backing file is changed
106  *   - a lock is released
115 	if (fid->vnode == 0 && fid->unique == 0) {  in afs_break_one_callback()
117 		write_lock(&volume->cb_v_break_lock);  in afs_break_one_callback()
118 		volume->cb_v_break++;  in afs_break_one_callback()
119 		trace_afs_cb_break(fid, volume->cb_v_break,  in afs_break_one_callback()
121 		write_unlock(&volume->cb_v_break_lock);  in afs_break_one_callback()
125 	/* See if we can find a matching inode - even an I_NEW inode needs to  in afs_break_one_callback()
129 	sb = rcu_dereference(volume->sb);  in afs_break_one_callback()
133 	inode = find_inode_rcu(sb, fid->vnode, afs_ilookup5_test_by_fid, fid);  in afs_break_one_callback()
148 	afs_volid_t vid = cbb->fid.vid;  in afs_break_some_callbacks()
151 	volume = afs_lookup_volume_rcu(server->cell, vid);  in afs_break_some_callbacks()
157 	for (i = *_count; i > 0; cbb++, i--) {  in afs_break_some_callbacks()
158 		if (cbb->fid.vid == vid) {  in afs_break_some_callbacks()
159 			_debug("- Fid { vl=%08llx n=%llu u=%u }",  in afs_break_some_callbacks()
160 			       cbb->fid.vid,  in afs_break_some_callbacks()
161 			       cbb->fid.vnode,  in afs_break_some_callbacks()
162 			       cbb->fid.unique);  in afs_break_some_callbacks()
163 			--*_count;  in afs_break_some_callbacks()
165 				afs_break_one_callback(volume, &cbb->fid);  in afs_break_some_callbacks()
175 void afs_break_callbacks(struct afs_server *server, size_t count,  in afs_break_callbacks()  argument
178 	_enter("%p,%zu,", server, count);  in afs_break_callbacks()
184 	while (count > 0)  in afs_break_callbacks()
185 		afs_break_some_callbacks(server, callbacks, &count);  in afs_break_callbacks()