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Commit 9c2db007 authored by Eric W. Biederman's avatar Eric W. Biederman
Browse files

signal: Pass pid type into send_sigio_to_task & send_sigurg_to_task 



This information is already present and using it directly simplifies the logic
of the code.

Signed-off-by: default avatar"Eric W. Biederman" <ebiederm@xmission.com>
parent 01024980

fs/fcntl.c

+9 −17
Original line number Diff line number Diff line
@@ -723,7 +723,7 @@ static inline int sigio_perm(struct task_struct *p, 


static void send_sigio_to_task(struct task_struct *p,

			       struct fown_struct *fown,

			       int fd, int reason, int group)

			       int fd, int reason, enum pid_type type)

{

	/*

	 * F_SETSIG can change ->signum lockless in parallel, make
@@ -767,11 +767,11 @@ static void send_sigio_to_task(struct task_struct *p, 
			else

				si.si_band = mangle_poll(band_table[reason - POLL_IN]);

			si.si_fd    = fd;

			if (!do_send_sig_info(signum, &si, p, group))

			if (!do_send_sig_info(signum, &si, p, type != PIDTYPE_PID))

				break;

		/* fall-through: fall back on the old plain SIGIO signal */

		case 0:

			do_send_sig_info(SIGIO, SEND_SIG_PRIV, p, group);

			do_send_sig_info(SIGIO, SEND_SIG_PRIV, p, type != PIDTYPE_PID);

	}

}
@@ -780,14 +780,10 @@ void send_sigio(struct fown_struct *fown, int fd, int band) 
	struct task_struct *p;

	enum pid_type type;

	struct pid *pid;

	int group = 1;

	

	read_lock(&fown->lock);



	type = fown->pid_type;

	if (type == PIDTYPE_PID)

		group = 0;



	pid = fown->pid;

	if (!pid)

		goto out_unlock_fown;
@@ -795,12 +791,12 @@ void send_sigio(struct fown_struct *fown, int fd, int band) 
	if (type <= PIDTYPE_TGID) {

		rcu_read_lock();

		p = pid_task(pid, PIDTYPE_PID);

		send_sigio_to_task(p, fown, fd, band, group);

		send_sigio_to_task(p, fown, fd, band, type);

		rcu_read_unlock();

	} else {

		read_lock(&tasklist_lock);

		do_each_pid_task(pid, type, p) {

			send_sigio_to_task(p, fown, fd, band, group);

			send_sigio_to_task(p, fown, fd, band, type);

		} while_each_pid_task(pid, type, p);

		read_unlock(&tasklist_lock);

	}
@@ -809,10 +805,10 @@ void send_sigio(struct fown_struct *fown, int fd, int band) 
}



static void send_sigurg_to_task(struct task_struct *p,

				struct fown_struct *fown, int group)

				struct fown_struct *fown, enum pid_type type)

{

	if (sigio_perm(p, fown, SIGURG))

		do_send_sig_info(SIGURG, SEND_SIG_PRIV, p, group);

		do_send_sig_info(SIGURG, SEND_SIG_PRIV, p, type != PIDTYPE_PID);

}



int send_sigurg(struct fown_struct *fown)
@@ -820,15 +816,11 @@ int send_sigurg(struct fown_struct *fown) 
	struct task_struct *p;

	enum pid_type type;

	struct pid *pid;

	int group = 1;

	int ret = 0;

	

	read_lock(&fown->lock);



	type = fown->pid_type;

	if (type == PIDTYPE_PID)

		group = 0;



	pid = fown->pid;

	if (!pid)

		goto out_unlock_fown;
@@ -838,12 +830,12 @@ int send_sigurg(struct fown_struct *fown) 
	if (type <= PIDTYPE_TGID) {

		rcu_read_lock();

		p = pid_task(pid, PIDTYPE_PID);

		send_sigurg_to_task(p, fown, group);

		send_sigurg_to_task(p, fown, type);

		rcu_read_unlock();

	} else {

		read_lock(&tasklist_lock);

		do_each_pid_task(pid, type, p) {

			send_sigurg_to_task(p, fown, group);

			send_sigurg_to_task(p, fown, type);

		} while_each_pid_task(pid, type, p);

		read_unlock(&tasklist_lock);

	}