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authorJosh Poimboeuf <jpoimboe@redhat.com>2017-02-13 19:42:41 -0600
committerJiri Kosina <jkosina@suse.cz>2017-03-08 09:38:19 +0100
commit7c23b330011690705613a66a8239d2ca64a41d4d (patch)
tree272edb45a2674e0df61c4a27e72b7bffc110b8fd /fs/proc
parentd83a7cb375eec21f04c83542395d08b2f6641da2 (diff)
downloadlinux-7c23b330011690705613a66a8239d2ca64a41d4d.tar.bz2
livepatch: add /proc/<pid>/patch_state
Expose the per-task patch state value so users can determine which tasks are holding up completion of a patching operation. Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com> Reviewed-by: Petr Mladek <pmladek@suse.com> Reviewed-by: Miroslav Benes <mbenes@suse.cz> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'fs/proc')
-rw-r--r--fs/proc/base.c15
1 files changed, 15 insertions, 0 deletions
diff --git a/fs/proc/base.c b/fs/proc/base.c
index c87b6b9a8a76..9e3ac5c11780 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -2834,6 +2834,15 @@ static int proc_pid_personality(struct seq_file *m, struct pid_namespace *ns,
return err;
}
+#ifdef CONFIG_LIVEPATCH
+static int proc_pid_patch_state(struct seq_file *m, struct pid_namespace *ns,
+ struct pid *pid, struct task_struct *task)
+{
+ seq_printf(m, "%d\n", task->patch_state);
+ return 0;
+}
+#endif /* CONFIG_LIVEPATCH */
+
/*
* Thread groups
*/
@@ -2933,6 +2942,9 @@ static const struct pid_entry tgid_base_stuff[] = {
REG("timers", S_IRUGO, proc_timers_operations),
#endif
REG("timerslack_ns", S_IRUGO|S_IWUGO, proc_pid_set_timerslack_ns_operations),
+#ifdef CONFIG_LIVEPATCH
+ ONE("patch_state", S_IRUSR, proc_pid_patch_state),
+#endif
};
static int proc_tgid_base_readdir(struct file *file, struct dir_context *ctx)
@@ -3315,6 +3327,9 @@ static const struct pid_entry tid_base_stuff[] = {
REG("projid_map", S_IRUGO|S_IWUSR, proc_projid_map_operations),
REG("setgroups", S_IRUGO|S_IWUSR, proc_setgroups_operations),
#endif
+#ifdef CONFIG_LIVEPATCH
+ ONE("patch_state", S_IRUSR, proc_pid_patch_state),
+#endif
};
static int proc_tid_base_readdir(struct file *file, struct dir_context *ctx)