From: Cyrill Gorcunov <gorcunov@openvz.org>
To: linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org,
Al Viro <viro@zeniv.linux.org.uk>
Cc: Alexey Dobriyan <adobriyan@gmail.com>,
Andrew Morton <akpm@linux-foundation.org>,
Pavel Emelyanov <xemul@parallels.com>,
James Bottomley <jbottomley@parallels.com>,
Matthew Helsley <matt.helsley@gmail.com>,
aneesh.kumar@linux.vnet.ibm.com, bfields@fieldses.org,
Cyrill Gorcunov <gorcunov@openvz.org>,
Al Viro <viro@zeniv.linux.org.uk>
Subject: [patch 7/7] fdinfo: Show sigmask for signalfd fd v2
Date: Thu, 13 Sep 2012 01:29:13 +0400 [thread overview]
Message-ID: <20120912213507.817386985@openvz.org> (raw)
In-Reply-To: 20120912212906.407242774@openvz.org
[-- Attachment #1: seq-fdinfo-signalfd-3 --]
[-- Type: text/plain, Size: 3312 bytes --]
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
CC: Al Viro <viro@ZenIV.linux.org.uk>
CC: Alexey Dobriyan <adobriyan@gmail.com>
CC: Andrew Morton <akpm@linux-foundation.org>
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>
---
fs/proc/array.c | 2 +-
fs/signalfd.c | 26 ++++++++++++++++++++++++++
include/linux/proc_fs.h | 3 +++
3 files changed, 30 insertions(+), 1 deletion(-)
Index: linux-2.6.git/fs/proc/array.c
===================================================================
--- linux-2.6.git.orig/fs/proc/array.c
+++ linux-2.6.git/fs/proc/array.c
@@ -220,7 +220,7 @@ static inline void task_state(struct seq
seq_putc(m, '\n');
}
-static void render_sigset_t(struct seq_file *m, const char *header,
+void render_sigset_t(struct seq_file *m, const char *header,
sigset_t *set)
{
int i;
Index: linux-2.6.git/fs/signalfd.c
===================================================================
--- linux-2.6.git.orig/fs/signalfd.c
+++ linux-2.6.git/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)
{
@@ -46,6 +47,7 @@ void signalfd_cleanup(struct sighand_str
}
struct signalfd_ctx {
+ seqcount_t cnt;
sigset_t sigmask;
};
@@ -227,7 +229,28 @@ static ssize_t signalfd_read(struct file
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;
+ unsigned seq;
+
+ do {
+ seq = read_seqcount_begin(&ctx->cnt);
+ sigmask = ctx->sigmask;
+ } while (read_seqcount_retry(&ctx->cnt, seq));
+
+ 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,
@@ -259,6 +282,7 @@ SYSCALL_DEFINE4(signalfd4, int, ufd, sig
return -ENOMEM;
ctx->sigmask = sigmask;
+ seqcount_init(&ctx->cnt);
/*
* When we call this, the initialization must be complete, since
@@ -279,7 +303,9 @@ SYSCALL_DEFINE4(signalfd4, int, ufd, sig
return -EINVAL;
}
spin_lock_irq(¤t->sighand->siglock);
+ write_seqcount_begin(&ctx->cnt);
ctx->sigmask = sigmask;
+ write_seqcount_end(&ctx->cnt);
spin_unlock_irq(¤t->sighand->siglock);
wake_up(¤t->sighand->signalfd_wqh);
Index: linux-2.6.git/include/linux/proc_fs.h
===================================================================
--- linux-2.6.git.orig/include/linux/proc_fs.h
+++ linux-2.6.git/include/linux/proc_fs.h
@@ -290,4 +290,7 @@ static inline struct net *PDE_NET(struct
return pde->parent->data;
}
+#include <asm/signal.h>
+
+void render_sigset_t(struct seq_file *m, const char *header, sigset_t *set);
#endif /* _LINUX_PROC_FS_H */
next prev parent reply other threads:[~2012-09-12 21:35 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-12 21:29 [patch 0/7] auxiliary fdinfo, new round Cyrill Gorcunov
2012-09-12 21:29 ` [patch 1/7] procfs: Add ability to plug in auxiliary fdinfo providers Cyrill Gorcunov
2012-09-17 18:18 ` Cyrill Gorcunov
2012-09-27 13:00 ` Pavel Emelyanov
2012-09-12 21:29 ` [patch 2/7] fs, exportfs: Escape nil dereference if no s_export_op present Cyrill Gorcunov
2012-09-12 21:29 ` [patch 3/7] fs, notify: Add file handle entry into inotify_inode_mark Cyrill Gorcunov
2012-09-12 21:29 ` [patch 4/7] fs, notify: Add procfs fdinfo helper v4 Cyrill Gorcunov
2012-09-12 21:29 ` [patch 5/7] fs, eventfd: Add procfs fdinfo helper Cyrill Gorcunov
2012-09-12 21:29 ` [patch 6/7] fs, epoll: Add procfs fdinfo helper v2 Cyrill Gorcunov
2012-09-12 21:29 ` Cyrill Gorcunov [this message]
-- strict thread matches above, loose matches on Subject: below --
2012-11-12 10:14 [patch 0/7] Providing additional information in fdinfo sufficient for c/r Cyrill Gorcunov
2012-11-12 10:14 ` [patch 7/7] fdinfo: Show sigmask for signalfd fd v2 Cyrill Gorcunov
2012-11-13 1:05 ` Andrew Morton
2012-08-16 16:34 [patch 0/7] procfs, fdinfo reworked, attempts N-th Cyrill Gorcunov
2012-08-16 16:34 ` [patch 7/7] fdinfo: Show sigmask for signalfd fd v2 Cyrill Gorcunov
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