1 files changed, 251 insertions, 0 deletions

diff --git a/security/keys/proc.c b/security/keys/proc.c
new file mode 100644
index 000000000000..91343b85c39c
--- /dev/null
+++ b/security/keys/proc.c
@@ -0,0 +1,251 @@
+/* proc.c: proc files for key database enumeration
+ *
+ * Copyright (C) 2004 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/fs.h>
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
+#include <asm/errno.h>
+#include "internal.h"
+
+#ifdef CONFIG_KEYS_DEBUG_PROC_KEYS
+static int proc_keys_open(struct inode *inode, struct file *file);
+static void *proc_keys_start(struct seq_file *p, loff_t *_pos);
+static void *proc_keys_next(struct seq_file *p, void *v, loff_t *_pos);
+static void proc_keys_stop(struct seq_file *p, void *v);
+static int proc_keys_show(struct seq_file *m, void *v);
+
+static struct seq_operations proc_keys_ops = {
+        .start  = proc_keys_start,
+        .next   = proc_keys_next,
+        .stop   = proc_keys_stop,
+        .show   = proc_keys_show,
+};
+
+static struct file_operations proc_keys_fops = {
+        .open           = proc_keys_open,
+        .read           = seq_read,
+        .llseek         = seq_lseek,
+        .release        = seq_release,
+};
+#endif
+
+static int proc_key_users_open(struct inode *inode, struct file *file);
+static void *proc_key_users_start(struct seq_file *p, loff_t *_pos);
+static void *proc_key_users_next(struct seq_file *p, void *v, loff_t *_pos);
+static void proc_key_users_stop(struct seq_file *p, void *v);
+static int proc_key_users_show(struct seq_file *m, void *v);
+
+static struct seq_operations proc_key_users_ops = {
+        .start  = proc_key_users_start,
+        .next   = proc_key_users_next,
+        .stop   = proc_key_users_stop,
+        .show   = proc_key_users_show,
+};
+
+static struct file_operations proc_key_users_fops = {
+        .open           = proc_key_users_open,
+        .read           = seq_read,
+        .llseek         = seq_lseek,
+        .release        = seq_release,
+};
+
+/*****************************************************************************/
+/*
+ * declare the /proc files
+ */
+static int __init key_proc_init(void)
+{
+        struct proc_dir_entry *p;
+
+#ifdef CONFIG_KEYS_DEBUG_PROC_KEYS
+        p = create_proc_entry("keys", 0, NULL);
+        if (!p)
+                panic("Cannot create /proc/keys\n");
+
+        p->proc_fops = &proc_keys_fops;
+#endif
+
+        p = create_proc_entry("key-users", 0, NULL);
+        if (!p)
+                panic("Cannot create /proc/key-users\n");
+
+        p->proc_fops = &proc_key_users_fops;
+
+        return 0;
+
+} /* end key_proc_init() */
+
+__initcall(key_proc_init);
+
+/*****************************************************************************/
+/*
+ * implement "/proc/keys" to provides a list of the keys on the system
+ */
+#ifdef CONFIG_KEYS_DEBUG_PROC_KEYS
+
+static int proc_keys_open(struct inode *inode, struct file *file)
+{
+        return seq_open(file, &proc_keys_ops);
+
+}
+
+static void *proc_keys_start(struct seq_file *p, loff_t *_pos)
+{
+        struct rb_node *_p;
+        loff_t pos = *_pos;
+
+        spin_lock(&key_serial_lock);
+
+        _p = rb_first(&key_serial_tree);
+        while (pos > 0 && _p) {
+                pos--;
+                _p = rb_next(_p);
+        }
+
+        return _p;
+
+}
+
+static void *proc_keys_next(struct seq_file *p, void *v, loff_t *_pos)
+{
+        (*_pos)++;
+        return rb_next((struct rb_node *) v);
+
+}
+
+static void proc_keys_stop(struct seq_file *p, void *v)
+{
+        spin_unlock(&key_serial_lock);
+}
+
+static int proc_keys_show(struct seq_file *m, void *v)
+{
+        struct rb_node *_p = v;
+        struct key *key = rb_entry(_p, struct key, serial_node);
+        struct timespec now;
+        unsigned long timo;
+        char xbuf[12];
+
+        now = current_kernel_time();
+
+        read_lock(&key->lock);
+
+        /* come up with a suitable timeout value */
+        if (key->expiry == 0) {
+                memcpy(xbuf, "perm", 5);
+        }
+        else if (now.tv_sec >= key->expiry) {
+                memcpy(xbuf, "expd", 5);
+        }
+        else {
+                timo = key->expiry - now.tv_sec;
+
+                if (timo < 60)
+                        sprintf(xbuf, "%lus", timo);
+                else if (timo < 60*60)
+                        sprintf(xbuf, "%lum", timo / 60);
+                else if (timo < 60*60*24)
+                        sprintf(xbuf, "%luh", timo / (60*60));
+                else if (timo < 60*60*24*7)
+                        sprintf(xbuf, "%lud", timo / (60*60*24));
+                else
+                        sprintf(xbuf, "%luw", timo / (60*60*24*7));
+        }
+
+        seq_printf(m, "%08x %c%c%c%c%c%c %5d %4s %06x %5d %5d %-9.9s ",
+                   key->serial,
+                   key->flags & KEY_FLAG_INSTANTIATED   ? 'I' : '-',
+                   key->flags & KEY_FLAG_REVOKED        ? 'R' : '-',
+                   key->flags & KEY_FLAG_DEAD           ? 'D' : '-',
+                   key->flags & KEY_FLAG_IN_QUOTA       ? 'Q' : '-',
+                   key->flags & KEY_FLAG_USER_CONSTRUCT ? 'U' : '-',
+                   key->flags & KEY_FLAG_NEGATIVE       ? 'N' : '-',
+                   atomic_read(&key->usage),
+                   xbuf,
+                   key->perm,
+                   key->uid,
+                   key->gid,
+                   key->type->name);
+
+        if (key->type->describe)
+                key->type->describe(key, m);
+        seq_putc(m, '\n');
+
+        read_unlock(&key->lock);
+
+        return 0;
+
+}
+
+#endif /* CONFIG_KEYS_DEBUG_PROC_KEYS */
+
+/*****************************************************************************/
+/*
+ * implement "/proc/key-users" to provides a list of the key users
+ */
+static int proc_key_users_open(struct inode *inode, struct file *file)
+{
+        return seq_open(file, &proc_key_users_ops);
+
+}
+
+static void *proc_key_users_start(struct seq_file *p, loff_t *_pos)
+{
+        struct rb_node *_p;
+        loff_t pos = *_pos;
+
+        spin_lock(&key_user_lock);
+
+        _p = rb_first(&key_user_tree);
+        while (pos > 0 && _p) {
+                pos--;
+                _p = rb_next(_p);
+        }
+
+        return _p;
+
+}
+
+static void *proc_key_users_next(struct seq_file *p, void *v, loff_t *_pos)
+{
+        (*_pos)++;
+        return rb_next((struct rb_node *) v);
+
+}
+
+static void proc_key_users_stop(struct seq_file *p, void *v)
+{
+        spin_unlock(&key_user_lock);
+}
+
+static int proc_key_users_show(struct seq_file *m, void *v)
+{
+        struct rb_node *_p = v;
+        struct key_user *user = rb_entry(_p, struct key_user, node);
+
+        seq_printf(m, "%5u: %5d %d/%d %d/%d %d/%d\n",
+                   user->uid,
+                   atomic_read(&user->usage),
+                   atomic_read(&user->nkeys),
+                   atomic_read(&user->nikeys),
+                   user->qnkeys,
+                   KEYQUOTA_MAX_KEYS,
+                   user->qnbytes,
+                   KEYQUOTA_MAX_BYTES
+                   );
+
+        return 0;
+
+}