46 #include <sys/proc.h>
89 pfs_visible_proc(struct thread *td, struct pfs_node *pn, struct proc *proc)  in pfs_visible_proc()  argument
92 	if (proc == NULL)  in pfs_visible_proc()
95 	PROC_LOCK_ASSERT(proc, MA_OWNED);  in pfs_visible_proc()
97 	if ((proc->p_flag & P_WEXIT) != 0)  in pfs_visible_proc()
99 	if (p_cansee(td, proc) != 0)  in pfs_visible_proc()
101 	return (pn_vis(td, proc, pn));  in pfs_visible_proc()
106     struct proc **p)  in pfs_visible()
108 	struct proc *proc;  in pfs_visible()  local
117 	proc = pfind(pid);  in pfs_visible()
118 	if (proc == NULL)  in pfs_visible()
120 	if (pfs_visible_proc(td, pn, proc)) {  in pfs_visible()
122 			*p = proc;  in pfs_visible()
124 			PROC_UNLOCK(proc);  in pfs_visible()
127 	PROC_UNLOCK(proc);  in pfs_visible()
132 pfs_lookup_proc(pid_t pid, struct proc **p)  in pfs_lookup_proc()
134 	struct proc *proc;  in pfs_lookup_proc()  local
136 	proc = pfind(pid);  in pfs_lookup_proc()
137 	if (proc == NULL)  in pfs_lookup_proc()
139 	if ((proc->p_flag & P_WEXIT) != 0) {  in pfs_lookup_proc()
140 		PROC_UNLOCK(proc);  in pfs_lookup_proc()
143 	_PHOLD(proc);  in pfs_lookup_proc()
144 	PROC_UNLOCK(proc);  in pfs_lookup_proc()
145 	*p = proc;  in pfs_lookup_proc()
180 	struct proc *proc;  in pfs_close()  local
194 		proc = pfind(pvd->pvd_pid);  in pfs_close()
196 		proc = NULL;  in pfs_close()
199 	error = pn_close(va->a_td, proc, pn);  in pfs_close()
201 	if (proc != NULL)  in pfs_close()
202 		PROC_UNLOCK(proc);  in pfs_close()
217 	struct proc *proc;  in pfs_getattr()  local
223 	if (!pfs_visible(curthread, pn, pvd->pvd_pid, &proc))  in pfs_getattr()
258 	if (proc != NULL) {  in pfs_getattr()
259 		vap->va_uid = proc->p_ucred->cr_ruid;  in pfs_getattr()
260 		vap->va_gid = proc->p_ucred->cr_rgid;  in pfs_getattr()
267 		error = pn_attr(curthread, proc, pn, vap);  in pfs_getattr()
269 	if(proc != NULL)  in pfs_getattr()
270 		PROC_UNLOCK(proc);  in pfs_getattr()
284 	struct proc *proc;  in pfs_ioctl()  local
314 	if (!pfs_visible(curthread, pn, pvd->pvd_pid, &proc)) {  in pfs_ioctl()
319 	error = pn_ioctl(curthread, proc, pn, va->a_command, va->a_data);  in pfs_ioctl()
321 	if (proc != NULL)  in pfs_ioctl()
322 		PROC_UNLOCK(proc);  in pfs_ioctl()
337 	struct proc *proc;  in pfs_getextattr()  local
347 	if (!pfs_visible(curthread, pn, pvd->pvd_pid, &proc))  in pfs_getextattr()
353 		error = pn_getextattr(curthread, proc, pn,  in pfs_getextattr()
357 	if (proc != NULL)  in pfs_getextattr()
358 		PROC_UNLOCK(proc);  in pfs_getextattr()
674 	struct proc *proc;  in pfs_read()  local
697 	if (!pfs_visible(curthread, pn, pvd->pvd_pid, &proc))  in pfs_read()
699 	if (proc != NULL) {  in pfs_read()
700 		_PHOLD(proc);  in pfs_read()
701 		PROC_UNLOCK(proc);  in pfs_read()
710 		error = pn_fill(curthread, proc, pn, NULL, uio);  in pfs_read()
744 	error = pn_fill(curthread, proc, pn, sb, uio);  in pfs_read()
777 	if (proc != NULL)  in pfs_read()
778 		PRELE(proc);  in pfs_read()
786 pfs_iterate(struct thread *td, struct proc *proc, struct pfs_node *pd,  in pfs_iterate()  argument
787 	    struct pfs_node **pn, struct proc **p)  in pfs_iterate()
820 	} else if (proc != NULL) {  in pfs_iterate()
821 		visible = pfs_visible_proc(td, *pn, proc);  in pfs_iterate()
848 	struct proc *p, *proc;  in pfs_readdir()  local
877 	proc = NULL;  in pfs_readdir()
878 	if (pid != NO_PID && !pfs_lookup_proc(pid, &proc))  in pfs_readdir()
884 	KASSERT(pid == NO_PID || proc != NULL,  in pfs_readdir()
888 		PROC_LOCK(proc);  in pfs_readdir()
891 		if (!pfs_visible_proc(curthread, pd, proc)) {  in pfs_readdir()
892 			_PRELE(proc);  in pfs_readdir()
893 			PROC_UNLOCK(proc);  in pfs_readdir()
902 		if (pfs_iterate(curthread, proc, pd, &pn, &p) == -1) {  in pfs_readdir()
904 			if (proc != NULL) {  in pfs_readdir()
905 				_PRELE(proc);  in pfs_readdir()
906 				PROC_UNLOCK(proc);  in pfs_readdir()
915 	while (pfs_iterate(curthread, proc, pd, &pn, &p) != -1 &&  in pfs_readdir()
958 	if (proc != NULL) {  in pfs_readdir()
959 		_PRELE(proc);  in pfs_readdir()
960 		PROC_UNLOCK(proc);  in pfs_readdir()
985 	struct proc *proc = NULL;  in pfs_readlink()  local
1001 		if ((proc = pfind(pvd->pvd_pid)) == NULL)  in pfs_readlink()
1003 		if (proc->p_flag & P_WEXIT) {  in pfs_readlink()
1004 			PROC_UNLOCK(proc);  in pfs_readlink()
1007 		_PHOLD(proc);  in pfs_readlink()
1008 		PROC_UNLOCK(proc);  in pfs_readlink()
1017 	error = pn_fill(curthread, proc, pn, &sb, NULL);  in pfs_readlink()
1019 	if (proc != NULL)  in pfs_readlink()
1020 		PRELE(proc);  in pfs_readlink()
1082 	struct proc *proc;  in pfs_write()  local
1106 	if (!pfs_visible(curthread, pn, pvd->pvd_pid, &proc))  in pfs_write()
1108 	if (proc != NULL) {  in pfs_write()
1109 		_PHOLD(proc);  in pfs_write()
1110 		PROC_UNLOCK(proc);  in pfs_write()
1114 		error = pn_fill(curthread, proc, pn, NULL, uio);  in pfs_write()
1115 		if (proc != NULL)  in pfs_write()
1116 			PRELE(proc);  in pfs_write()
1122 		if (proc != NULL)  in pfs_write()
1123 			PRELE(proc);  in pfs_write()
1127 	error = pn_fill(curthread, proc, pn, &sb, uio);  in pfs_write()
1130 	if (proc != NULL)  in pfs_write()
1131 		PRELE(proc);  in pfs_write()