From 2903ff019b346ab8d36ebbf54853c3aaf6590608 Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Tue, 28 Aug 2012 12:52:22 -0400
Subject: switch simple cases of fget_light to fdget

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
 fs/signalfd.c | 13 ++++++-------
 1 file changed, 6 insertions(+), 7 deletions(-)

(limited to 'fs/signalfd.c')

diff --git a/fs/signalfd.c b/fs/signalfd.c
index 9f35a37173d..8bee4e57091 100644
--- a/fs/signalfd.c
+++ b/fs/signalfd.c
@@ -269,13 +269,12 @@ SYSCALL_DEFINE4(signalfd4, int, ufd, sigset_t __user *, user_mask,
 		if (ufd < 0)
 			kfree(ctx);
 	} else {
-		int fput_needed;
-		struct file *file = fget_light(ufd, &fput_needed);
-		if (!file)
+		struct fd f = fdget(ufd);
+		if (!f.file)
 			return -EBADF;
-		ctx = file->private_data;
-		if (file->f_op != &signalfd_fops) {
-			fput_light(file, fput_needed);
+		ctx = f.file->private_data;
+		if (f.file->f_op != &signalfd_fops) {
+			fdput(f);
 			return -EINVAL;
 		}
 		spin_lock_irq(&current->sighand->siglock);
@@ -283,7 +282,7 @@ SYSCALL_DEFINE4(signalfd4, int, ufd, sigset_t __user *, user_mask,
 		spin_unlock_irq(&current->sighand->siglock);
 
 		wake_up(&current->sighand->signalfd_wqh);
-		fput_light(file, fput_needed);
+		fdput(f);
 	}
 
 	return ufd;
-- 
cgit v1.2.3


From 138d22b58696c506799f8de759804083ff9effae Mon Sep 17 00:00:00 2001
From: Cyrill Gorcunov <gorcunov@openvz.org>
Date: Mon, 17 Dec 2012 16:05:02 -0800
Subject: fs, epoll: add procfs fdinfo helper

This allows us to print out eventpoll target file descriptor, events and
data, the /proc/pid/fdinfo/fd consists of

 | pos:	0
 | flags:	02
 | tfd:        5 events:       1d data: ffffffffffffffff enabled: 1

[avagin@: fix for unitialized ret variable]

Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Acked-by: Pavel Emelyanov <xemul@parallels.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Andrey Vagin <avagin@openvz.org>
Cc: Al Viro <viro@ZenIV.linux.org.uk>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Cc: James Bottomley <jbottomley@parallels.com>
Cc: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Matthew Helsley <matt.helsley@gmail.com>
Cc: "J. Bruce Fields" <bfields@fieldses.org>
Cc: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@onelan.co.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 fs/signalfd.c | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

(limited to 'fs/signalfd.c')

diff --git a/fs/signalfd.c b/fs/signalfd.c
index 8bee4e57091..b5348696173 100644
--- a/fs/signalfd.c
+++ b/fs/signalfd.c
@@ -29,6 +29,7 @@
 #include <linux/anon_inodes.h>
 #include <linux/signalfd.h>
 #include <linux/syscalls.h>
+#include <linux/proc_fs.h>
 
 void signalfd_cleanup(struct sighand_struct *sighand)
 {
@@ -227,7 +228,24 @@ static ssize_t signalfd_read(struct file *file, char __user *buf, size_t count,
 	return total ? total: ret;
 }
 
+#ifdef CONFIG_PROC_FS
+static int signalfd_show_fdinfo(struct seq_file *m, struct file *f)
+{
+	struct signalfd_ctx *ctx = f->private_data;
+	sigset_t sigmask;
+
+	sigmask = ctx->sigmask;
+	signotset(&sigmask);
+	render_sigset_t(m, "sigmask:\t", &sigmask);
+
+	return 0;
+}
+#endif
+
 static const struct file_operations signalfd_fops = {
+#ifdef CONFIG_PROC_FS
+	.show_fdinfo	= signalfd_show_fdinfo,
+#endif
 	.release	= signalfd_release,
 	.poll		= signalfd_poll,
 	.read		= signalfd_read,
-- 
cgit v1.2.3