request_key.c (41be702a542a0d14bb0b1c16e824fa9ed27616ec) request_key.c (743162013d40ca612b4cb53d3a200dff2d9ab26e)
1/* Request a key from userspace
2 *
3 * Copyright (C) 2004-2007 Red Hat, Inc. All Rights Reserved.
4 * Written by David Howells (dhowells@redhat.com)
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version

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16#include <linux/kmod.h>
17#include <linux/err.h>
18#include <linux/keyctl.h>
19#include <linux/slab.h>
20#include "internal.h"
21
22#define key_negative_timeout 60 /* default timeout on a negative key's existence */
23
1/* Request a key from userspace
2 *
3 * Copyright (C) 2004-2007 Red Hat, Inc. All Rights Reserved.
4 * Written by David Howells (dhowells@redhat.com)
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version

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16#include <linux/kmod.h>
17#include <linux/err.h>
18#include <linux/keyctl.h>
19#include <linux/slab.h>
20#include "internal.h"
21
22#define key_negative_timeout 60 /* default timeout on a negative key's existence */
23
24/*
25 * wait_on_bit() sleep function for uninterruptible waiting
26 */
27static int key_wait_bit(void *flags)
28{
29 schedule();
30 return 0;
31}
32
33/*
34 * wait_on_bit() sleep function for interruptible waiting
35 */
36static int key_wait_bit_intr(void *flags)
37{
38 schedule();
39 return signal_pending(current) ? -ERESTARTSYS : 0;
40}
41
42/**
43 * complete_request_key - Complete the construction of a key.
44 * @cons: The key construction record.
45 * @error: The success or failute of the construction.
46 *
47 * Complete the attempt to construct a key. The key will be negated
48 * if an error is indicated. The authorisation key will be revoked
49 * unconditionally.

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587 * if the key was negated; or -EKEYREVOKED or -EKEYEXPIRED if the key was
588 * revoked or expired.
589 */
590int wait_for_key_construction(struct key *key, bool intr)
591{
592 int ret;
593
594 ret = wait_on_bit(&key->flags, KEY_FLAG_USER_CONSTRUCT,
24/**
25 * complete_request_key - Complete the construction of a key.
26 * @cons: The key construction record.
27 * @error: The success or failute of the construction.
28 *
29 * Complete the attempt to construct a key. The key will be negated
30 * if an error is indicated. The authorisation key will be revoked
31 * unconditionally.

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569 * if the key was negated; or -EKEYREVOKED or -EKEYEXPIRED if the key was
570 * revoked or expired.
571 */
572int wait_for_key_construction(struct key *key, bool intr)
573{
574 int ret;
575
576 ret = wait_on_bit(&key->flags, KEY_FLAG_USER_CONSTRUCT,
595 intr ? key_wait_bit_intr : key_wait_bit,
596 intr ? TASK_INTERRUPTIBLE : TASK_UNINTERRUPTIBLE);
577 intr ? TASK_INTERRUPTIBLE : TASK_UNINTERRUPTIBLE);
597 if (ret < 0)
598 return ret;
578 if (ret)
579 return -ERESTARTSYS;
599 if (test_bit(KEY_FLAG_NEGATIVE, &key->flags)) {
600 smp_rmb();
601 return key->type_data.reject_error;
602 }
603 return key_validate(key);
604}
605EXPORT_SYMBOL(wait_for_key_construction);
606

--- 122 unchanged lines hidden --- 		580 if (test_bit(KEY_FLAG_NEGATIVE, &key->flags)) {
581 smp_rmb();
582 return key->type_data.reject_error;
583 }
584 return key_validate(key);
585}
586EXPORT_SYMBOL(wait_for_key_construction);
587

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