The patch titled
Subject: fdinfo: show sigmask for signalfd fd
has been added to the -mm tree. Its filename is
fdinfo-show-sigmask-for-signalfd-fd.patch
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*** Remember to use Documentation/SubmitChecklist when testing your code ***
The -mm tree is included into linux-next and is updated
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------------------------------------------------------
From: Cyrill Gorcunov <gorcunov@xxxxxxxxxx>
Subject: fdinfo: show sigmask for signalfd fd
Signed-off-by: Pavel Emelyanov <xemul@xxxxxxxxxxxxx>
Signed-off-by: Cyrill Gorcunov <gorcunov@xxxxxxxxxx>
Cc: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
Cc: Alexey Dobriyan <adobriyan@xxxxxxxxx>
Cc: James Bottomley <jbottomley@xxxxxxxxxxxxx>
Cc: "Aneesh Kumar K.V" <aneesh.kumar@xxxxxxxxxxxxxxxxxx>
Cc: Alexey Dobriyan <adobriyan@xxxxxxxxx>
Cc: Matthew Helsley <matt.helsley@xxxxxxxxx>
Cc: "J. Bruce Fields" <bfields@xxxxxxxxxxxx>
Cc: "Aneesh Kumar K.V" <aneesh.kumar@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/proc/array.c | 2 +-
fs/signalfd.c | 26 ++++++++++++++++++++++++++
include/linux/proc_fs.h | 3 +++
3 files changed, 30 insertions(+), 1 deletion(-)
diff -puN fs/proc/array.c~fdinfo-show-sigmask-for-signalfd-fd fs/proc/array.c
--- a/fs/proc/array.c~fdinfo-show-sigmask-for-signalfd-fd
+++ a/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;
diff -puN fs/signalfd.c~fdinfo-show-sigmask-for-signalfd-fd fs/signalfd.c
--- a/fs/signalfd.c~fdinfo-show-sigmask-for-signalfd-fd
+++ a/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
@@ -278,7 +302,9 @@ 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);
diff -puN include/linux/proc_fs.h~fdinfo-show-sigmask-for-signalfd-fd include/linux/proc_fs.h
--- a/include/linux/proc_fs.h~fdinfo-show-sigmask-for-signalfd-fd
+++ a/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 */
_
Patches currently in -mm which might be from gorcunov@xxxxxxxxxx are
linux-next.patch
proc-check-vma-vm_file-before-dereferencing.patch
procfs-add-vmflags-field-in-smaps-output-v4.patch
procfs-add-vmflags-field-in-smaps-output-v4-fix.patch
proc-pid-status-add-seccomp-field.patch
procfs-add-ability-to-plug-in-auxiliary-fdinfo-providers.patch
procfs-add-ability-to-plug-in-auxiliary-fdinfo-providers-fix.patch
fs-exportfs-avoid-nil-dereference-if-no-s_export_op-present.patch
fs-notify-add-file-handle-entry-into-inotify_inode_mark.patch
fs-notify-add-procfs-fdinfo-helper.patch
fs-eventfd-add-procfs-fdinfo-helper.patch
fs-epoll-add-procfs-fdinfo-helper.patch
fdinfo-show-sigmask-for-signalfd-fd.patch
tools-testing-selftests-kcmp-kcmp_testc-print-reason-for-failure-in-kcmp_test.patch
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