109 	struct fifoinfo *fip;  in fifo_cleanup()  local
112 	fip = vp->v_fifoinfo;  in fifo_cleanup()
113 	if (fip->fi_readers == 0 && fip->fi_writers == 0) {  in fifo_cleanup()
115 		pipe_dtor(fip->fi_pipe);  in fifo_cleanup()
116 		free(fip, M_VNODE);  in fifo_cleanup()
131 	struct fifoinfo *fip;  in fifo_open()  local
142 	if ((fip = vp->v_fifoinfo) == NULL) {  in fifo_open()
146 		fip = malloc(sizeof(*fip), M_VNODE, M_WAITOK | M_ZERO);  in fifo_open()
147 		fip->fi_pipe = fpipe;  in fifo_open()
150 		vp->v_fifoinfo = fip;  in fifo_open()
152 	fpipe = fip->fi_pipe;  in fifo_open()
162 		fip->fi_readers++;  in fifo_open()
163 		fip->fi_rgen++;  in fifo_open()
164 		if (fip->fi_readers == 1) {  in fifo_open()
166 			if (fip->fi_writers > 0) {  in fifo_open()
167 				wakeup(&fip->fi_writers);  in fifo_open()
171 		fp->f_pipegen = fpipe->pipe_wgen - fip->fi_writers;  in fifo_open()
174 		if ((ap->a_mode & O_NONBLOCK) && fip->fi_readers == 0) {  in fifo_open()
176 			if (fip->fi_writers == 0)  in fifo_open()
180 		fip->fi_writers++;  in fifo_open()
181 		fip->fi_wgen++;  in fifo_open()
182 		if (fip->fi_writers == 1) {  in fifo_open()
184 			if (fip->fi_readers > 0) {  in fifo_open()
185 				wakeup(&fip->fi_readers);  in fifo_open()
191 		if ((ap->a_mode & FREAD) && fip->fi_writers == 0) {  in fifo_open()
192 			gen = fip->fi_wgen;  in fifo_open()
195 			error = msleep(&fip->fi_readers, PIPE_MTX(fpipe),  in fifo_open()
199 			if (error != 0 && gen == fip->fi_wgen) {  in fifo_open()
200 				fip->fi_readers--;  in fifo_open()
201 				if (fip->fi_readers == 0) {  in fifo_open()
219 		if ((ap->a_mode & FWRITE) && fip->fi_readers == 0) {  in fifo_open()
220 			gen = fip->fi_rgen;  in fifo_open()
223 			error = msleep(&fip->fi_writers, PIPE_MTX(fpipe),  in fifo_open()
227 			if (error != 0 && gen == fip->fi_rgen) {  in fifo_open()
228 				fip->fi_writers--;  in fifo_open()
229 				if (fip->fi_writers == 0) {  in fifo_open()
264 	struct fifoinfo *fip;  in fifo_close()  local
269 	fip = vp->v_fifoinfo;  in fifo_close()
279 	if (fip == NULL)  in fifo_close()
282 	cpipe = fip->fi_pipe;  in fifo_close()
284 		fip->fi_readers--;  in fifo_close()
285 		if (fip->fi_readers == 0) {  in fifo_close()
297 		fip->fi_writers--;  in fifo_close()
298 		if (fip->fi_writers == 0) {  in fifo_close()
320 	struct fifoinfo *fip = vp->v_fifoinfo;  in fifo_printinfo()  local
322 	if (fip == NULL){  in fifo_printinfo()
327 		fip->fi_readers, fip->fi_writers);  in fifo_printinfo()