Release 4.18 security/selinux/selinuxfs.c

/* Updated: Karl MacMillan <kmacmillan@tresys.com>
 *
 *      Added conditional policy language extensions
 *
 *  Updated: Hewlett-Packard <paul@paul-moore.com>
 *
 *      Added support for the policy capability bitmap
 *
 * Copyright (C) 2007 Hewlett-Packard Development Company, L.P.
 * Copyright (C) 2003 - 2004 Tresys Technology, LLC
 * Copyright (C) 2004 Red Hat, Inc., James Morris <jmorris@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, version 2.
 */

#include <linux/kernel.h>
#include <linux/pagemap.h>
#include <linux/slab.h>
#include <linux/vmalloc.h>
#include <linux/fs.h>
#include <linux/mount.h>
#include <linux/mutex.h>
#include <linux/init.h>
#include <linux/string.h>
#include <linux/security.h>
#include <linux/major.h>
#include <linux/seq_file.h>
#include <linux/percpu.h>
#include <linux/audit.h>
#include <linux/uaccess.h>
#include <linux/kobject.h>
#include <linux/ctype.h>

/* selinuxfs pseudo filesystem for exporting the security policy API.
   Based on the proc code and the fs/nfsd/nfsctl.c code. */

#include "flask.h"
#include "avc.h"
#include "avc_ss.h"
#include "security.h"
#include "objsec.h"
#include "conditional.h"


enum sel_inos {
	
SEL_ROOT_INO = 2,
	
SEL_LOAD,	/* load policy */
	
SEL_ENFORCE,	/* get or set enforcing status */
	
SEL_CONTEXT,	/* validate context */
	
SEL_ACCESS,	/* compute access decision */
	
SEL_CREATE,	/* compute create labeling decision */
	
SEL_RELABEL,	/* compute relabeling decision */
	
SEL_USER,	/* compute reachable user contexts */
	
SEL_POLICYVERS,	/* return policy version for this kernel */
	
SEL_COMMIT_BOOLS, /* commit new boolean values */
	
SEL_MLS,	/* return if MLS policy is enabled */
	
SEL_DISABLE,	/* disable SELinux until next reboot */
	
SEL_MEMBER,	/* compute polyinstantiation membership decision */
	
SEL_CHECKREQPROT, /* check requested protection, not kernel-applied one */
	
SEL_COMPAT_NET,	/* whether to use old compat network packet controls */
	
SEL_REJECT_UNKNOWN, /* export unknown reject handling to userspace */
	
SEL_DENY_UNKNOWN, /* export unknown deny handling to userspace */
	
SEL_STATUS,	/* export current status using mmap() */
	
SEL_POLICY,	/* allow userspace to read the in kernel policy */
	
SEL_VALIDATE_TRANS, /* compute validatetrans decision */
	
SEL_INO_NEXT,	/* The next inode number to use */
};


struct selinux_fs_info {
	
struct dentry *bool_dir;
	
unsigned int bool_num;
	
char **bool_pending_names;
	
unsigned int *bool_pending_values;
	
struct dentry *class_dir;
	
unsigned long last_class_ino;
	
bool policy_opened;
	
struct dentry *policycap_dir;
	
struct mutex mutex;
	
unsigned long last_ino;
	
struct selinux_state *state;
	
struct super_block *sb;
};



static int selinux_fs_info_create(struct super_block *sb)
{
	struct selinux_fs_info *fsi;

	fsi = kzalloc(sizeof(*fsi), GFP_KERNEL);
	if (!fsi)
		return -ENOMEM;

	mutex_init(&fsi->mutex);
	fsi->last_ino = SEL_INO_NEXT - 1;
	fsi->state = &selinux_state;
	fsi->sb = sb;
	sb->s_fs_info = fsi;
	return 0;
}

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73
96.05%
1
50.00%
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3
3.95%
1
50.00%
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76
100.00%
2
100.00%



static void selinux_fs_info_free(struct super_block *sb)
{
	struct selinux_fs_info *fsi = sb->s_fs_info;
	int i;

	if (fsi) {
		for (i = 0; i < fsi->bool_num; i++)
			kfree(fsi->bool_pending_names[i]);
		kfree(fsi->bool_pending_names);
		kfree(fsi->bool_pending_values);
	}
	kfree(sb->s_fs_info);
	sb->s_fs_info = NULL;
}

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Stephen D. Smalley
80
98.77%
1
50.00%
James Carter
1
1.23%
1
50.00%
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81
100.00%
2
100.00%


#define SEL_INITCON_INO_OFFSET		0x01000000

#define SEL_BOOL_INO_OFFSET		0x02000000

#define SEL_CLASS_INO_OFFSET		0x04000000

#define SEL_POLICYCAP_INO_OFFSET	0x08000000

#define SEL_INO_MASK			0x00ffffff


#define TMPBUFLEN	12


static ssize_t sel_read_enforce(struct file *filp, char __user *buf,
				size_t count, loff_t *ppos)
{
	struct selinux_fs_info *fsi = file_inode(filp)->i_sb->s_fs_info;
	char tmpbuf[TMPBUFLEN];
	ssize_t length;

	length = scnprintf(tmpbuf, TMPBUFLEN, "%d",
			   enforcing_enabled(fsi->state));
	return simple_read_from_buffer(buf, count, ppos, tmpbuf, length);
}

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Andrew Morton
45
57.69%
2
28.57%
Stephen D. Smalley
19
24.36%
2
28.57%
Chris Wright
12
15.38%
1
14.29%
Paul Moore
1
1.28%
1
14.29%
Al Viro
1
1.28%
1
14.29%
Total
78
100.00%
7
100.00%

#ifdef CONFIG_SECURITY_SELINUX_DEVELOP


static ssize_t sel_write_enforce(struct file *file, const char __user *buf,
				 size_t count, loff_t *ppos)

{
	struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info;
	struct selinux_state *state = fsi->state;
	char *page = NULL;
	ssize_t length;
	int old_value, new_value;

	if (count >= PAGE_SIZE)
		return -ENOMEM;

	/* No partial writes. */
	if (*ppos != 0)
		return -EINVAL;

	page = memdup_user_nul(buf, count);
	if (IS_ERR(page))
		return PTR_ERR(page);

	length = -EINVAL;
	if (sscanf(page, "%d", &new_value) != 1)
		goto out;

	new_value = !!new_value;

	old_value = enforcing_enabled(state);
	if (new_value != old_value) {
		length = avc_has_perm(&selinux_state,
				      current_sid(), SECINITSID_SECURITY,
				      SECCLASS_SECURITY, SECURITY__SETENFORCE,
				      NULL);
		if (length)
			goto out;
		audit_log(audit_context(), GFP_KERNEL, AUDIT_MAC_STATUS,
			"enforcing=%d old_enforcing=%d auid=%u ses=%u"
			" enabled=%d old-enabled=%d lsm=selinux res=1",
			new_value, old_value,
			from_kuid(&init_user_ns, audit_get_loginuid(current)),
			audit_get_sessionid(current),
			selinux_enabled, selinux_enabled);
		enforcing_set(state, new_value);
		if (new_value)
			avc_ss_reset(state->avc, 0);
		selnl_notify_setenforce(new_value);
		selinux_status_update_setenforce(state, new_value);
		if (!new_value)
			call_lsm_notifier(LSM_POLICY_CHANGE, NULL);
	}
	length = count;
out:
	kfree(page);
	return length;
}
Contributors
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Andrew Morton
125
46.47%
1
5.26%
Stephen D. Smalley
65
24.16%
5
26.32%
Al Viro
19
7.06%
2
10.53%
Steve Grubb
18
6.69%
1
5.26%
Daniel Jurgens
11
4.09%
1
5.26%
Eric Paris
8
2.97%
2
10.53%
Richard Guy Briggs
6
2.23%
2
10.53%
Eric W. Biedermann
6
2.23%
1
5.26%
KaiGai Kohei
4
1.49%
1
5.26%
James Morris
4
1.49%
1
5.26%
Paul Moore
2
0.74%
1
5.26%
Joe Perches
1
0.37%
1
5.26%
Total
269
100.00%
19
100.00%

#else

#define sel_write_enforce NULL
#endif


static const struct file_operations sel_enforce_ops = {
	.read		= sel_read_enforce,
	.write		= sel_write_enforce,
	.llseek		= generic_file_llseek,
};



static ssize_t sel_read_handle_unknown(struct file *filp, char __user *buf,
					size_t count, loff_t *ppos)
{
	struct selinux_fs_info *fsi = file_inode(filp)->i_sb->s_fs_info;
	struct selinux_state *state = fsi->state;
	char tmpbuf[TMPBUFLEN];
	ssize_t length;
	ino_t ino = file_inode(filp)->i_ino;
	int handle_unknown = (ino == SEL_REJECT_UNKNOWN) ?
		security_get_reject_unknown(state) :
		!security_get_allow_unknown(state);

	length = scnprintf(tmpbuf, TMPBUFLEN, "%d", handle_unknown);
	return simple_read_from_buffer(buf, count, ppos, tmpbuf, length);
}

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Eric Paris
80
71.43%
1
25.00%
Stephen D. Smalley
29
25.89%
2
50.00%
Al Viro
3
2.68%
1
25.00%
Total
112
100.00%
4
100.00%


static const struct file_operations sel_handle_unknown_ops = {
	.read		= sel_read_handle_unknown,
	.llseek		= generic_file_llseek,
};



static int sel_open_handle_status(struct inode *inode, struct file *filp)
{
	struct selinux_fs_info *fsi = file_inode(filp)->i_sb->s_fs_info;
	struct page    *status = selinux_kernel_status_page(fsi->state);

	if (!status)
		return -ENOMEM;

	filp->private_data = status;

	return 0;
}

Contributors
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KaiGai Kohei
41
68.33%
1
33.33%
Stephen D. Smalley
19
31.67%
2
66.67%
Total
60
100.00%
3
100.00%



static ssize_t sel_read_handle_status(struct file *filp, char __user *buf,
				      size_t count, loff_t *ppos)
{
	struct page    *status = filp->private_data;

	BUG_ON(!status);

	return simple_read_from_buffer(buf, count, ppos,
				       page_address(status),
				       sizeof(struct selinux_kernel_status));
}

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CommitProp
KaiGai Kohei
59
100.00%
1
100.00%
Total
59
100.00%
1
100.00%



static int sel_mmap_handle_status(struct file *filp,
				  struct vm_area_struct *vma)
{
	struct page    *status = filp->private_data;
	unsigned long	size = vma->vm_end - vma->vm_start;

	BUG_ON(!status);

	/* only allows one page from the head */
	if (vma->vm_pgoff > 0 || size != PAGE_SIZE)
		return -EIO;
	/* disallow writable mapping */
	if (vma->vm_flags & VM_WRITE)
		return -EPERM;
	/* disallow mprotect() turns it into writable */
	vma->vm_flags &= ~VM_MAYWRITE;

	return remap_pfn_range(vma, vma->vm_start,
			       page_to_pfn(status),
			       size, vma->vm_page_prot);
}

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KaiGai Kohei
102
100.00%
1
100.00%
Total
102
100.00%
1
100.00%


static const struct file_operations sel_handle_status_ops = {
	.open		= sel_open_handle_status,
	.read		= sel_read_handle_status,
	.mmap		= sel_mmap_handle_status,
	.llseek		= generic_file_llseek,
};

#ifdef CONFIG_SECURITY_SELINUX_DISABLE


static ssize_t sel_write_disable(struct file *file, const char __user *buf,
				 size_t count, loff_t *ppos)

{
	struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info;
	char *page;
	ssize_t length;
	int new_value;
	int enforcing;

	if (count >= PAGE_SIZE)
		return -ENOMEM;

	/* No partial writes. */
	if (*ppos != 0)
		return -EINVAL;

	page = memdup_user_nul(buf, count);
	if (IS_ERR(page))
		return PTR_ERR(page);

	length = -EINVAL;
	if (sscanf(page, "%d", &new_value) != 1)
		goto out;

	if (new_value) {
		enforcing = enforcing_enabled(fsi->state);
		length = selinux_disable(fsi->state);
		if (length)
			goto out;
		audit_log(audit_context(), GFP_KERNEL, AUDIT_MAC_STATUS,
			"enforcing=%d old_enforcing=%d auid=%u ses=%u"
			" enabled=%d old-enabled=%d lsm=selinux res=1",
			enforcing, enforcing,
			from_kuid(&init_user_ns, audit_get_loginuid(current)),
			audit_get_sessionid(current), 0, 1);
	}

	length = count;
out:
	kfree(page);
	return length;
}
Contributors
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Andrew Morton
112
56.28%
1
10.00%
Richard Guy Briggs
23
11.56%
2
20.00%
Al Viro
19
9.55%
2
20.00%
Stephen D. Smalley
19
9.55%
2
20.00%
Steve Grubb
15
7.54%
1
10.00%
Eric W. Biedermann
6
3.02%
1
10.00%
Eric Paris
5
2.51%
1
10.00%
Total
199
100.00%
10
100.00%

#else

#define sel_write_disable NULL
#endif


static const struct file_operations sel_disable_ops = {
	.write		= sel_write_disable,
	.llseek		= generic_file_llseek,
};



static ssize_t sel_read_policyvers(struct file *filp, char __user *buf,
				   size_t count, loff_t *ppos)
{
	char tmpbuf[TMPBUFLEN];
	ssize_t length;

	length = scnprintf(tmpbuf, TMPBUFLEN, "%u", POLICYDB_VERSION_MAX);
	return simple_read_from_buffer(buf, count, ppos, tmpbuf, length);
}

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Chris Wright
40
67.80%
1
50.00%
Andrew Morton
19
32.20%
1
50.00%
Total
59
100.00%
2
100.00%


static const struct file_operations sel_policyvers_ops = {
	.read		= sel_read_policyvers,
	.llseek		= generic_file_llseek,
};

/* declaration for sel_write_load */
static int sel_make_bools(struct selinux_fs_info *fsi);
static int sel_make_classes(struct selinux_fs_info *fsi);
static int sel_make_policycap(struct selinux_fs_info *fsi);

/* declaration for sel_make_class_dirs */
static struct dentry *sel_make_dir(struct dentry *dir, const char *name,
			unsigned long *ino);



static ssize_t sel_read_mls(struct file *filp, char __user *buf,
				size_t count, loff_t *ppos)
{
	struct selinux_fs_info *fsi = file_inode(filp)->i_sb->s_fs_info;
	char tmpbuf[TMPBUFLEN];
	ssize_t length;

	length = scnprintf(tmpbuf, TMPBUFLEN, "%d",
			   security_mls_enabled(fsi->state));
	return simple_read_from_buffer(buf, count, ppos, tmpbuf, length);
}

Contributors
Person
Tokens
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CommitProp
Andrew Morton
45
57.69%
2
28.57%
Stephen D. Smalley
19
24.36%
2
28.57%
Chris Wright
12
15.38%
1
14.29%
Al Viro
1
1.28%
1
14.29%
Guido Trentalancia
1
1.28%
1
14.29%
Total
78
100.00%
7
100.00%


static const struct file_operations sel_mls_ops = {
	.read		= sel_read_mls,
	.llseek		= generic_file_llseek,
};


struct policy_load_memory {
	
size_t len;
	
void *data;
};



static int sel_open_policy(struct inode *inode, struct file *filp)
{
	struct selinux_fs_info *fsi = inode->i_sb->s_fs_info;
	struct selinux_state *state = fsi->state;
	struct policy_load_memory *plm = NULL;
	int rc;

	BUG_ON(filp->private_data);

	mutex_lock(&fsi->mutex);

	rc = avc_has_perm(&selinux_state,
			  current_sid(), SECINITSID_SECURITY,
			  SECCLASS_SECURITY, SECURITY__READ_POLICY, NULL);
	if (rc)
		goto err;

	rc = -EBUSY;
	if (fsi->policy_opened)
		goto err;

	rc = -ENOMEM;
	plm = kzalloc(sizeof(*plm), GFP_KERNEL);
	if (!plm)
		goto err;

	if (i_size_read(inode) != security_policydb_len(state)) {
		inode_lock(inode);
		i_size_write(inode, security_policydb_len(state));
		inode_unlock(inode);
	}

	rc = security_read_policy(state, &plm->data, &plm->len);
	if (rc)
		goto err;

	fsi->policy_opened = 1;

	filp->private_data = plm;

	mutex_unlock(&fsi->mutex);

	return 0;
err:
	mutex_unlock(&fsi->mutex);

	if (plm)
		vfree(plm->data);
	kfree(plm);
	return rc;
}

Contributors
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Eric Paris
181
76.37%
1
16.67%
Stephen D. Smalley
54
22.78%
4
66.67%
Al Viro
2
0.84%
1
16.67%
Total
237
100.00%
6
100.00%



static int sel_release_policy(struct inode *inode, struct file *filp)
{
	struct selinux_fs_info *fsi = inode->i_sb->s_fs_info;
	struct policy_load_memory *plm = filp->private_data;

	BUG_ON(!plm);

	fsi->policy_opened = 0;

	vfree(plm->data);
	kfree(plm);

	return 0;
}

Contributors
Person
Tokens
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Eric Paris
50
79.37%
1
50.00%
Stephen D. Smalley
13
20.63%
1
50.00%
Total
63
100.00%
2
100.00%



static ssize_t sel_read_policy(struct file *filp, char __user *buf,
			       size_t count, loff_t *ppos)
{
	struct policy_load_memory *plm = filp->private_data;
	int ret;

	ret = avc_has_perm(&selinux_state,
			   current_sid(), SECINITSID_SECURITY,
			  SECCLASS_SECURITY, SECURITY__READ_POLICY, NULL);
	if (ret)
		return ret;

	return simple_read_from_buffer(buf, count, ppos, plm->data, plm->len);
}

Contributors
Person
Tokens
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CommitProp
Eric Paris
64
81.01%
1
25.00%
Stephen D. Smalley
12
15.19%
2
50.00%
Jann Horn
3
3.80%
1
25.00%
Total
79
100.00%
4
100.00%



static vm_fault_t sel_mmap_policy_fault(struct vm_fault *vmf)
{
	struct policy_load_memory *plm = vmf->vma->vm_file->private_data;
	unsigned long offset;
	struct page *page;

	if (vmf->flags & (FAULT_FLAG_MKWRITE | FAULT_FLAG_WRITE))
		return VM_FAULT_SIGBUS;

	offset = vmf->pgoff << PAGE_SHIFT;
	if (offset >= roundup(plm->len, PAGE_SIZE))
		return VM_FAULT_SIGBUS;

	page = vmalloc_to_page(plm->data + offset);
	get_page(page);

	vmf->page = page;

	return 0;
}

Contributors
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Tokens
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CommitProp
Eric Paris
94
96.91%
1
33.33%
Dave Jiang
2
2.06%
1
33.33%
Souptick Joarder
1
1.03%
1
33.33%
Total
97
100.00%
3
100.00%


static const struct vm_operations_struct sel_mmap_policy_ops = {
	.fault = sel_mmap_policy_fault,
	.page_mkwrite = sel_mmap_policy_fault,
};



static int sel_mmap_policy(struct file *filp, struct vm_area_struct *vma)
{
	if (vma->vm_flags & VM_SHARED) {
		/* do not allow mprotect to make mapping writable */
		vma->vm_flags &= ~VM_MAYWRITE;

		if (vma->vm_flags & VM_WRITE)
			return -EACCES;
	}

	vma->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
	vma->vm_ops = &sel_mmap_policy_ops;

	return 0;
}

Contributors
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Eric Paris
60
93.75%
1
33.33%
Konstantin Khlebnikov
3
4.69%
1
33.33%
James Morris
1
1.56%
1
33.33%
Total
64
100.00%
3
100.00%


static const struct file_operations sel_policy_ops = {
	.open		= sel_open_policy,
	.read		= sel_read_policy,
	.mmap		= sel_mmap_policy,
	.release	= sel_release_policy,
	.llseek		= generic_file_llseek,
};



static int sel_make_policy_nodes(struct selinux_fs_info *fsi)
{
	int ret;

	ret = sel_make_bools(fsi);
	if (ret) {
		pr_err("SELinux: failed to load policy booleans\n");
		return ret;
	}

	ret = sel_make_classes(fsi);
	if (ret) {
		pr_err("SELinux: failed to load policy classes\n");
		return ret;
	}

	ret = sel_make_policycap(fsi);
	if (ret) {
		pr_err("SELinux: failed to load policy capabilities\n");
		return ret;
	}

	return 0;
}

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80
100.00%
1
100.00%
Total
80
100.00%
1
100.00%



static ssize_t sel_write_load(struct file *file, const char __user *buf,
			      size_t count, loff_t *ppos)

{
	struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info;
	ssize_t length;
	void *data = NULL;

	mutex_lock(&fsi->mutex);

	length = avc_has_perm(&selinux_state,
			      current_sid(), SECINITSID_SECURITY,
			      SECCLASS_SECURITY, SECURITY__LOAD_POLICY, NULL);
	if (length)
		goto out;

	/* No partial writes. */
	length = -EINVAL;
	if (*ppos != 0)
		goto out;

	length = -EFBIG;
	if (count > 64 * 1024 * 1024)
		goto out;

	length = -ENOMEM;
	data = vmalloc(count);
	if (!data)
		goto out;

	length = -EFAULT;
	if (copy_from_user(data, buf, count) != 0)
		goto out;

	length = security_load_policy(fsi->state, data, count);
	if (length) {
		pr_warn_ratelimited("SELinux: failed to load policy\n");
		goto out;
	}

	length = sel_make_policy_nodes(fsi);
	if (length)
		goto out1;

	length = count;

out1:
	audit_log(audit_context(), GFP_KERNEL, AUDIT_MAC_POLICY_LOAD,
		"auid=%u ses=%u lsm=selinux res=1",
		from_kuid(&init_user_ns, audit_get_loginuid(current)),
		audit_get_sessionid(current));
out:
	mutex_unlock(&fsi->mutex);
	vfree(data);
	return length;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Andrew Morton
137
55.02%
2
11.76%
Stephen D. Smalley
38
15.26%
4
23.53%
Eric Paris
34
13.65%
2
11.76%
Steve Grubb
15
6.02%
1
5.88%
Gary Tierney
10
4.02%
1
5.88%
Eric W. Biedermann
6
2.41%
1
5.88%
Christopher J. PeBenito
2
0.80%
1
5.88%
Ingo Molnar
2
0.80%
1
5.88%
Paul Moore
2
0.80%
1
5.88%
Richard Guy Briggs
2
0.80%
2
11.76%
Al Viro
1
0.40%
1
5.88%
Total
249
100.00%
17
100.00%


static const struct file_operations sel_load_ops = {
	.write		= sel_write_load,
	.llseek		= generic_file_llseek,
};



static ssize_t sel_write_context(struct file *file, char *buf, size_t size)
{
	struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info;
	struct selinux_state *state = fsi->state;
	char *canon = NULL;
	u32 sid, len;
	ssize_t length;

	length = avc_has_perm(&selinux_state,
			      current_sid(), SECINITSID_SECURITY,
			      SECCLASS_SECURITY, SECURITY__CHECK_CONTEXT, NULL);
	if (length)
		goto out;

	length = security_context_to_sid(state, buf, size, &sid, GFP_KERNEL);
	if (length)
		goto out;

	length = security_sid_to_context(state, sid, &canon, &len);
	if (length)
		goto out;

	length = -ERANGE;
	if (len > SIMPLE_TRANSACTION_LIMIT) {
		printk(KERN_ERR "SELinux: %s:  context size (%u) exceeds "
			"payload max\n", __func__, len);
		goto out;
	}

	memcpy(buf, canon, len);
	length = len;
out:
	kfree(canon);
	return length;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Stephen D. Smalley
83
47.16%
5
50.00%
Andrew Morton
73
41.48%
1
10.00%
Eric Paris
17
9.66%
2
20.00%
Nikolay Aleksandrov
2
1.14%
1
10.00%
Harvey Harrison
1
0.57%
1
10.00%
Total
176
100.00%
10
100.00%



static ssize_t sel_read_checkreqprot(struct file *filp, char __user *buf,
				     size_t count, loff_t *ppos)
{
	struct selinux_fs_info *fsi = file_inode(filp)->i_sb->s_fs_info;
	char tmpbuf[TMPBUFLEN];
	ssize_t length;

	length = scnprintf(tmpbuf, TMPBUFLEN, "%u", fsi->state->checkreqprot);
	return simple_read_from_buffer(buf, count, ppos, tmpbuf, length);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Stephen D. Smalley
77
100.00%
3
100.00%
Total
77
100.00%
3
100.00%



static ssize_t sel_write_checkreqprot(struct file *file, const char __user *buf,
				      size_t count, loff_t *ppos)
{
	struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info;
	char *page;
	ssize_t length;
	unsigned int new_value;

	length = avc_has_perm(&selinux_state,
			      current_sid(), SECINITSID_SECURITY,
			      SECCLASS_SECURITY, SECURITY__SETCHECKREQPROT,
			      NULL);
	if (length)
		return length;

	if (count >= PAGE_SIZE)
		return -ENOMEM;

	/* No partial writes. */
	if (*ppos != 0)
		return -EINVAL;

	page = memdup_user_nul(buf, count);
	if (IS_ERR(page))
		return PTR_ERR(page);

	length = -EINVAL;
	if (sscanf(page, "%u", &new_value) != 1)
		goto out;

	fsi->state->checkreqprot = new_value ? 1 : 0;
	length = count;
out:
	kfree(page);
	return length;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Stephen D. Smalley
147
88.02%
5
83.33%
Al Viro
20
11.98%
1
16.67%
Total
167
100.00%
6
100.00%


static const struct file_operations sel_checkreqprot_ops = {
	.read		= sel_read_checkreqprot,
	.write		= sel_write_checkreqprot,
	.llseek		= generic_file_llseek,
};



static ssize_t sel_write_validatetrans(struct file *file,
					const char __user *buf,
					size_t count, loff_t *ppos)
{
	struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info;
	struct selinux_state *state = fsi->state;
	char *oldcon = NULL, *newcon = NULL, *taskcon = NULL;
	char *req = NULL;
	u32 osid, nsid, tsid;
	u16 tclass;
	int rc;

	rc = avc_has_perm(&selinux_state,
			  current_sid(), SECINITSID_SECURITY,
			  SECCLASS_SECURITY, SECURITY__VALIDATE_TRANS, NULL);
	if (rc)
		goto out;

	rc = -ENOMEM;
	if (count >= PAGE_SIZE)
		goto out;

	/* No partial writes. */
	rc = -EINVAL;
	if (*ppos != 0)
		goto out;

	req = memdup_user_nul(buf, count);
	if (IS_ERR(req)) {
		rc = PTR_ERR(req);
		req = NULL;
		goto out;
	}

	rc = -ENOMEM;
	oldcon = kzalloc(count + 1, GFP_KERNEL);
	if (!oldcon)
		goto out;

	newcon = kzalloc(count + 1, GFP_KERNEL);
	if (!newcon)
		goto out;

	taskcon = kzalloc(count + 1, GFP_KERNEL);
	if (!taskcon)
		goto out;

	rc = -EINVAL;
	if (sscanf(req, "%s %s %hu %s", oldcon, newcon, &tclass, taskcon) != 4)
		goto out;

	rc = security_context_str_to_sid(state, oldcon, &osid, GFP_KERNEL);
	if (rc)
		goto out;

	rc = security_context_str_to_sid(state, newcon, &nsid, GFP_KERNEL);
	if (rc)
		goto out;

	rc = security_context_str_to_sid(state, taskcon, &tsid, GFP_KERNEL);
	if (rc)
		goto out;

	rc = security_validate_transition_user(state, osid, nsid, tsid, tclass);
	if (!rc)
		rc = count;
out:
	kfree(req);
	kfree(oldcon);
	kfree(newcon);
	kfree(taskcon);
	return rc;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Andrew Perepechko
315
84.68%
1
16.67%
Stephen D. Smalley
43
11.56%
4
66.67%
Al Viro
14
3.76%
1
16.67%
Total
372
100.00%
6
100.00%


static const struct file_operations sel_transition_ops = {
	.write		= sel_write_validatetrans,
	.llseek		= generic_file_llseek,
};

/*
 * Remaining nodes use transaction based IO methods like nfsd/nfsctl.c
 */
static ssize_t sel_write_access(struct file *file, char *buf, size_t size);
static ssize_t sel_write_create(struct file *file, char *buf, size_t size);
static ssize_t sel_write_relabel(struct file *file, char *buf, size_t size);
static ssize_t sel_write_user(struct file *file, char *buf, size_t size);
static ssize_t sel_write_member(struct file *file, char *buf, size_t size);


static ssize_t (*write_op[])(struct file *, char *, size_t) = {
	[SEL_ACCESS] = sel_write_access,
	[SEL_CREATE] = sel_write_create,
	[SEL_RELABEL] = sel_write_relabel,
	[SEL_USER] = sel_write_user,
	[SEL_MEMBER] = sel_write_member,
	[SEL_CONTEXT] = sel_write_context,

};


static ssize_t selinux_transaction_write(struct file *file, const char __user *buf, size_t size, loff_t *pos)
{
	ino_t ino = file_inode(file)->i_ino;
	char *data;
	ssize_t rv;

	if (ino >= ARRAY_SIZE(write_op) || !write_op[ino])
		return -EINVAL;

	data = simple_transaction_get(file, buf, size);
	if (IS_ERR(data))
		return PTR_ERR(data);

	rv = write_op[ino](file, data, size);
	if (rv > 0) {
		simple_transaction_set(file, rv);
		rv = size;
	}
	return rv;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Andrew Morton
102
84.30%
1
20.00%
James Morris
14
11.57%
1
20.00%
Al Viro
4
3.31%
2
40.00%
Nicolas Kaiser
1
0.83%
1
20.00%
Total
121
100.00%
5
100.00%


static const struct file_operations transaction_ops = {
	.write		= selinux_transaction_write,
	.read		= simple_transaction_read,
	.release	= simple_transaction_release,
	.llseek		= generic_file_llseek,
};

/*
 * payload - write methods
 * If the method has a response, the response should be put in buf,
 * and the length returned.  Otherwise return 0 or and -error.
 */



static ssize_t sel_write_access(struct file *file, char *buf, size_t size)
{
	struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info;
	struct selinux_state *state = fsi->state;
	char *scon = NULL, *tcon = NULL;
	u32 ssid, tsid;
	u16 tclass;
	struct av_decision avd;
	ssize_t length;

	length = avc_has_perm(&selinux_state,
			      current_sid(), SECINITSID_SECURITY,
			      SECCLASS_SECURITY, SECURITY__COMPUTE_AV, NULL);
	if (length)
		goto out;

	length = -ENOMEM;
	scon = kzalloc(size + 1, GFP_KERNEL);
	if (!scon)
		goto out;

	length = -ENOMEM;
	tcon = kzalloc(size + 1, GFP_KERNEL);
	if (!tcon)
		goto out;

	length = -EINVAL;
	if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3)
		goto out;

	length = security_context_str_to_sid(state, scon, &ssid, GFP_KERNEL);
	if (length)
		goto out;

	length = security_context_str_to_sid(state, tcon, &tsid, GFP_KERNEL);
	if (length)
		goto out;

	security_compute_av_user(state, ssid, tsid, tclass, &avd);

	length = scnprintf(buf, SIMPLE_TRANSACTION_LIMIT,
			  "%x %x %x %x %u %x",
			  avd.allowed, 0xffffffff,
			  avd.auditallow, avd.auditdeny,
			  avd.seqno, avd.flags);
out:
	kfree(tcon);
	kfree(scon);
	return length;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Andrew Morton
194
71.59%
2
13.33%
Stephen D. Smalley
44
16.24%
6
40.00%
Eric Paris
19
7.01%
2
13.33%
KaiGai Kohei
5
1.85%
1
6.67%
Nikolay Aleksandrov
4
1.48%
1
6.67%
James Morris
3
1.11%
2
13.33%
Rasmus Villemoes
2
0.74%
1
6.67%
Total
271
100.00%
15
100.00%



static ssize_t sel_write_create(struct file *file, char *buf, size_t size)
{
	struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info;
	struct selinux_state *state = fsi->state;
	char *scon = NULL, *tcon = NULL;
	char *namebuf = NULL, *objname = NULL;
	u32 ssid, tsid, newsid;
	u16 tclass;
	ssize_t length;
	char *newcon = NULL;
	u32 len;
	int nargs;

	length = avc_has_perm(&selinux_state,
			      current_sid(), SECINITSID_SECURITY,
			      SECCLASS_SECURITY, SECURITY__COMPUTE_CREATE,
			      NULL);
	if (length)
		goto out;

	length = -ENOMEM;
	scon = kzalloc(size + 1, GFP_KERNEL);
	if (!scon)
		goto out;

	length = -ENOMEM;
	tcon = kzalloc(size + 1, GFP_KERNEL);
	if (!tcon)
		goto out;

	length = -ENOMEM;
	namebuf = kzalloc(size + 1, GFP_KERNEL);
	if (!namebuf)
		goto out;

	length = -EINVAL;
	nargs = sscanf(buf, "%s %s %hu %s", scon, tcon, &tclass, namebuf);
	if (nargs < 3 || nargs > 4)
		goto out;
	if (nargs == 4) {
		/*
                 * If and when the name of new object to be queried contains
                 * either whitespace or multibyte characters, they shall be
                 * encoded based on the percentage-encoding rule.
                 * If not encoded, the sscanf logic picks up only left-half
                 * of the supplied name; splitted by a whitespace unexpectedly.
                 */
		char   *r, *w;
		int     c1, c2;

		r = w = namebuf;
		do {
			c1 = *r++;
			if (c1 == '+')
				c1 = ' ';
			else if (c1 == '%') {
				c1 = hex_to_bin(*r++);
				if (c1 < 0)
					goto out;
				c2 = hex_to_bin(*r++);
				if (c2 < 0)
					goto out;
				c1 = (c1 << 4) | c2;
			}
			*w++ = c1;
		} while (c1 != '\0');

		objname = namebuf;
	}

	length = security_context_str_to_sid(state, scon, &ssid, GFP_KERNEL);
	if (length)
		goto out;

	length = security_context_str_to_sid(state, tcon, &tsid, GFP_KERNEL);
	if (length)
		goto out;

	length = security_transition_sid_user(state, ssid, tsid, tclass,
					      objname, &newsid);
	if (length)
		goto out;

	length = security_sid_to_context(state, newsid, &newcon, &len);
	if (length)
		goto out;

	length = -ERANGE;
	if (len > SIMPLE_TRANSACTION_LIMIT) {
		printk(KERN_ERR "SELinux: %s:  context size (%u) exceeds "
			"payload max\n", __func__, len);
		goto out;
	}

	memcpy(buf, newcon, len);
	length = len;
out:
	kfree(newcon);
	kfree(namebuf);
	kfree(tcon);
	kfree(scon);
	return length;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Andrew Morton
234
47.37%
1
6.25%
Kohei Kaigai
166
33.60%
2
12.50%
Stephen D. Smalley
44
8.91%
5
31.25%
Eric Paris
30
6.07%
2
12.50%
Andy Shevchenko
10
2.02%
1
6.25%
Nikolay Aleksandrov
4
0.81%
1
6.25%
James Morris
3
0.61%
2
12.50%
Rasmus Villemoes
2
0.40%
1
6.25%
Harvey Harrison
1
0.20%
1
6.25%
Total
494
100.00%
16
100.00%



static ssize_t sel_write_relabel(struct file *file, char *buf, size_t size)
{
	struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info;
	struct selinux_state *state = fsi->state;
	char *scon = NULL, *tcon = NULL;
	u32 ssid, tsid, newsid;
	u16 tclass;
	ssize_t length;
	char *newcon = NULL;
	u32 len;

	length = avc_has_perm(&selinux_state,
			      current_sid(), SECINITSID_SECURITY,
			      SECCLASS_SECURITY, SECURITY__COMPUTE_RELABEL,
			      NULL);
	if (length)
		goto out;

	length = -ENOMEM;
	scon = kzalloc(size + 1, GFP_KERNEL);
	if (!scon)
		goto out;

	length = -ENOMEM;
	tcon = kzalloc(size + 1, GFP_KERNEL);
	if (!tcon)
		goto out;

	length = -EINVAL;
	if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3)
		goto out;

	length = security_context_str_to_sid(state, scon, &ssid, GFP_KERNEL);
	if (length)
		goto out;

	length = security_context_str_to_sid(state, tcon, &tsid, GFP_KERNEL);
	if (length)
		goto out;

	length = security_change_sid(state, ssid, tsid, tclass, &newsid);
	if (length)
		goto out;

	length = security_sid_to_context(state, newsid, &newcon, &len);
	if (length)
		goto out;

	length = -ERANGE;
	if (len > SIMPLE_TRANSACTION_LIMIT)
		goto out;

	memcpy(buf, newcon, len);
	length = len;
out:
	kfree(newcon);
	kfree(tcon);
	kfree(scon);
	return length;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Andrew Morton
228
74.03%
1
10.00%
Stephen D. Smalley
43
13.96%
4
40.00%
Eric Paris
28
9.09%
1
10.00%
Nikolay Aleksandrov
4
1.30%
1
10.00%
James Morris
3
0.97%
2
20.00%
Rasmus Villemoes
2
0.65%
1
10.00%
Total
308
100.00%
10
100.00%



static ssize_t sel_write_user(struct file *file, char *buf, size_t size)
{
	struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info;
	struct selinux_state *state = fsi->state;
	char *con = NULL, *user = NULL, *ptr;
	u32 sid, *sids = NULL;
	ssize_t length;
	char *newcon;
	int i, rc;
	u32 len, nsids;

	length = avc_has_perm(&selinux_state,
			      current_sid(), SECINITSID_SECURITY,
			      SECCLASS_SECURITY, SECURITY__COMPUTE_USER,
			      NULL);
	if (length)
		goto out;

	length = -ENOMEM;
	con = kzalloc(size + 1, GFP_KERNEL);
	if (!con)
		goto out;

	length = -ENOMEM;
	user = kzalloc(size + 1, GFP_KERNEL);
	if (!user)
		goto out;

	length = -EINVAL;
	if (sscanf(buf, "%s %s", con, user) != 2)
		goto out;

	length = security_context_str_to_sid(state, con, &sid, GFP_KERNEL);
	if (length)
		goto out;

	length = security_get_user_sids(state, sid, user, &sids, &nsids);
	if (length)
		goto out;

	length = sprintf(buf, "%u", nsids) + 1;
	ptr = buf + length;
	for (i = 0; i < nsids; i++) {
		rc = security_sid_to_context(state, sids[i], &newcon, &len);
		if (rc) {
			length = rc;
			goto out;
		}
		if ((length + len) >= SIMPLE_TRANSACTION_LIMIT) {
			kfree(newcon);
			length = -ERANGE;
			goto out;
		}
		memcpy(ptr, newcon, len);
		kfree(newcon);
		ptr += len;
		length += len;
	}
out:
	kfree(sids);
	kfree(user);
	kfree(con);
	return length;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Andrew Morton
285
80.51%
1
10.00%
Stephen D. Smalley
41
11.58%
4
40.00%
Eric Paris
22
6.21%
1
10.00%
James Morris
3
0.85%
2
20.00%
Nikolay Aleksandrov
2
0.56%
1
10.00%
Rasmus Villemoes
1
0.28%
1
10.00%
Total
354
100.00%
10
100.00%



static ssize_t sel_write_member(struct file *file, char *buf, size_t size)
{
	struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info;
	struct selinux_state *state = fsi->state;
	char *scon = NULL, *tcon = NULL;
	u32 ssid, tsid, newsid;
	u16 tclass;
	ssize_t length;
	char *newcon = NULL;
	u32 len;

	length = avc_has_perm(&selinux_state,
			      current_sid(), SECINITSID_SECURITY,
			      SECCLASS_SECURITY, SECURITY__COMPUTE_MEMBER,
			      NULL);
	if (length)
		goto out;

	length = -ENOMEM;
	scon = kzalloc(size + 1, GFP_KERNEL);
	if (!scon)
		goto out;

	length = -ENOMEM;
	tcon = kzalloc(size + 1, GFP_KERNEL);
	if (!tcon)
		goto out;

	length = -EINVAL;
	if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3)
		goto out;

	length = security_context_str_to_sid(state, scon, &ssid, GFP_KERNEL);
	if (length)
		goto out;

	length = security_context_str_to_sid(state, tcon, &tsid, GFP_KERNEL);
	if (length)
		goto out;

	length = security_member_sid(state, ssid, tsid, tclass, &newsid);
	if (length)
		goto out;

	length = security_sid_to_context(state, newsid, &newcon, &len);
	if (length)
		goto out;

	length = -ERANGE;
	if (len > SIMPLE_TRANSACTION_LIMIT) {
		printk(KERN_ERR "SELinux: %s:  context size (%u) exceeds "
			"payload max\n", __func__, len);
		goto out;
	}

	memcpy(buf, newcon, len);
	length = len;
out:
	kfree(newcon);
	kfree(tcon);
	kfree(scon);
	return length;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Stephen D. Smalley
282
87.85%
5
45.45%
Eric Paris
30
9.35%
2
18.18%
Nikolay Aleksandrov
4
1.25%
1
9.09%
James Morris
2
0.62%
1
9.09%
Rasmus Villemoes
2
0.62%
1
9.09%
Harvey Harrison
1
0.31%
1
9.09%
Total
321
100.00%
11
100.00%



static struct inode *sel_make_inode(struct super_block *sb, int mode)
{
	struct inode *ret = new_inode(sb);

	if (ret) {
		ret->i_mode = mode;
		ret->i_atime = ret->i_mtime = ret->i_ctime = current_time(ret);
	}
	return ret;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Andrew Morton
54
93.10%
2
66.67%
Deepa Dinamani
4
6.90%
1
33.33%
Total
58
100.00%
3
100.00%



static ssize_t sel_read_bool(struct file *filep, char __user *buf,
			     size_t count, loff_t *ppos)
{
	struct selinux_fs_info *fsi = file_inode(filep)->i_sb->s_fs_info;
	char *page = NULL;
	ssize_t length;
	ssize_t ret;
	int cur_enforcing;
	unsigned index = file_inode(filep)->i_ino & SEL_INO_MASK;
	const char *name = filep->f_path.dentry->d_name.name;

	mutex_lock(&fsi->mutex);

	ret = -EINVAL;
	if (index >= fsi->bool_num || strcmp(name,
					     fsi->bool_pending_names[index]))
		goto out_unlock;

	ret = -ENOMEM;
	page = (char *)get_zeroed_page(GFP_KERNEL);
	if (!page)
		goto out_unlock;

	cur_enforcing = security_get_bool_value(fsi->state, index);
	if (cur_enforcing < 0) {
		ret = cur_enforcing;
		goto out_unlock;
	}
	length = scnprintf(page, PAGE_SIZE, "%d %d", cur_enforcing,
			  fsi->bool_pending_values[index]);
	mutex_unlock(&fsi->mutex);
	ret = simple_read_from_buffer(buf, count, ppos, page, length);
out_free:
	free_page((unsigned long)page);
	return ret;

out_unlock:
	mutex_unlock(&fsi->mutex);
	goto out_free;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Andrew Morton
117
49.79%
1
8.33%
Stephen D. Smalley
73
31.06%
4
33.33%
Jann Horn
25
10.64%
1
8.33%
Eric Paris
13
5.53%
2
16.67%
Al Viro
5
2.13%
2
16.67%
Ingo Molnar
1
0.43%
1
8.33%
Chris Wright
1
0.43%
1
8.33%
Total
235
100.00%
12
100.00%



static ssize_t sel_write_bool(struct file *filep, const char __user *buf,
			      size_t count, loff_t *ppos)
{
	struct selinux_fs_info *fsi = file_inode(filep)->i_sb->s_fs_info;
	char *page = NULL;
	ssize_t length;
	int new_value;
	unsigned index = file_inode(filep)->i_ino & SEL_INO_MASK;
	const char *name = filep->f_path.dentry->d_name.name;

	if (count >= PAGE_SIZE)
		return -ENOMEM;

	/* No partial writes. */
	if (*ppos != 0)
		return -EINVAL;

	page = memdup_user_nul(buf, count);
	if (IS_ERR(page))
		return PTR_ERR(page);

	mutex_lock(&fsi->mutex);

	length = avc_has_perm(&selinux_state,
			      current_sid(), SECINITSID_SECURITY,
			      SECCLASS_SECURITY, SECURITY__SETBOOL,
			      NULL);
	if (length)
		goto out;

	length = -EINVAL;
	if (index >= fsi->bool_num || strcmp(name,
					     fsi->bool_pending_names[index]))
		goto out;

	length = -EINVAL;
	if (sscanf(page, "%d", &new_value) != 1)
		goto out;

	if (new_value)
		new_value = 1;

	fsi->bool_pending_values[index] = new_value;
	length = count;

out:
	mutex_unlock(&fsi->mutex);
	kfree(page);
	return length;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Andrew Morton
106
43.44%
1
9.09%
Stephen D. Smalley
78
31.97%
4
36.36%
Jann Horn
44
18.03%
1
9.09%
Eric Paris
8
3.28%
1
9.09%
Al Viro
6
2.46%
3
27.27%
Ingo Molnar
2
0.82%
1
9.09%
Total
244
100.00%
11
100.00%


static const struct file_operations sel_bool_ops = {
	.read		= sel_read_bool,
	.write		= sel_write_bool,
	.llseek		= generic_file_llseek,
};



static ssize_t sel_commit_bools_write(struct file *filep,
				      const char __user *buf,
				      size_t count, loff_t *ppos)
{
	struct selinux_fs_info *fsi = file_inode(filep)->i_sb->s_fs_info;
	char *page = NULL;
	ssize_t length;
	int new_value;

	if (count >= PAGE_SIZE)
		return -ENOMEM;

	/* No partial writes. */
	if (*ppos != 0)
		return -EINVAL;

	page = memdup_user_nul(buf, count);
	if (IS_ERR(page))
		return PTR_ERR(page);

	mutex_lock(&fsi->mutex);

	length = avc_has_perm(&selinux_state,
			      current_sid(), SECINITSID_SECURITY,
			      SECCLASS_SECURITY, SECURITY__SETBOOL,
			      NULL);
	if (length)
		goto out;

	length = -EINVAL;
	if (sscanf(page, "%d", &new_value) != 1)
		goto out;

	length = 0;
	if (new_value && fsi->bool_pending_values)
		length = security_set_bools(fsi->state, fsi->bool_num,
					    fsi->bool_pending_values);

	if (!length)
		length = count;

out:
	mutex_unlock(&fsi->mutex);
	kfree(page);
	return length;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Andrew Morton
114
55.34%
1
11.11%
Jann Horn
37
17.96%
1
11.11%
Stephen D. Smalley
27
13.11%
2
22.22%
Al Viro
14
6.80%
2
22.22%
Eric Paris
11
5.34%
1
11.11%
Davi Arnaut
2
0.97%
1
11.11%
Ingo Molnar
1
0.49%
1
11.11%
Total
206
100.00%
9
100.00%


static const struct file_operations sel_commit_bools_ops = {
	.write		= sel_commit_bools_write,
	.llseek		= generic_file_llseek,
};



static void sel_remove_entries(struct dentry *de)
{
	d_genocide(de);
	shrink_dcache_parent(de);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Andrew Morton
16
76.19%
1
25.00%
Al Viro
2
9.52%
1
25.00%
Nicholas Piggin
2
9.52%
1
25.00%
Christopher J. PeBenito
1
4.76%
1
25.00%
Total
21
100.00%
4
100.00%


#define BOOL_DIR_NAME "booleans"



static int sel_make_bools(struct selinux_fs_info *fsi)
{
	int i, ret;
	ssize_t len;
	struct dentry *dentry = NULL;
	struct dentry *dir = fsi->bool_dir;
	struct inode *inode = NULL;
	struct inode_security_struct *isec;
	char **names = NULL, *page;
	int num;
	int *values = NULL;
	u32 sid;

	/* remove any existing files */
	for (i = 0; i < fsi->bool_num; i++)
		kfree(fsi->bool_pending_names[i]);
	kfree(fsi->bool_pending_names);
	kfree(fsi->bool_pending_values);
	fsi->bool_num = 0;
	fsi->bool_pending_names = NULL;
	fsi->bool_pending_values = NULL;

	sel_remove_entries(dir);

	ret = -ENOMEM;
	page = (char *)get_zeroed_page(GFP_KERNEL);
	if (!page)
		goto out;

	ret = security_get_bools(fsi->state, &num, &names, &values);
	if (ret)
		goto out;

	for (i = 0; i < num; i++) {
		ret = -ENOMEM;
		dentry = d_alloc_name(dir, names[i]);
		if (!dentry)
			goto out;

		ret = -ENOMEM;
		inode = sel_make_inode(dir->d_sb, S_IFREG | S_IRUGO | S_IWUSR);
		if (!inode)
			goto out;

		ret = -ENAMETOOLONG;
		len = snprintf(page, PAGE_SIZE, "/%s/%s", BOOL_DIR_NAME, names[i]);
		if (len >= PAGE_SIZE)
			goto out;

		isec = (struct inode_security_struct *)inode->i_security;
		ret = security_genfs_sid(fsi->state, "selinuxfs", page,
					 SECCLASS_FILE, &sid);
		if (ret) {
			pr_warn_ratelimited("SELinux: no sid found, defaulting to security isid for %s\n",
					   page);
			sid = SECINITSID_SECURITY;
		}

		isec->sid = sid;
		isec->initialized = LABEL_INITIALIZED;
		inode->i_fop = &sel_bool_ops;
		inode->i_ino = i|SEL_BOOL_INO_OFFSET;
		d_add(dentry, inode);
	}
	fsi->bool_num = num;
	fsi->bool_pending_names = names;
	fsi->bool_pending_values = values;

	free_page((unsigned long)page);
	return 0;
out:
	free_page((unsigned long)page);

	if (names) {
		for (i = 0; i < num; i++)
			kfree(names[i]);
		kfree(names);
	}
	kfree(values);
	sel_remove_entries(dir);

	return ret;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Andrew Morton
289
64.65%
1
5.88%
Stephen D. Smalley
62
13.87%
3
17.65%
Eric Paris
44
9.84%
3
17.65%
Xiaotian Feng
21
4.70%
1
5.88%
Gary Tierney
13
2.91%
2
11.76%
Davi Arnaut
7
1.57%
1
5.88%
James Morris
5
1.12%
1
5.88%
James Carter
2
0.45%
1
5.88%
Al Viro
1
0.22%
1
5.88%
Christopher J. PeBenito
1
0.22%
1
5.88%
Chris Wright
1
0.22%
1
5.88%
Andreas Gruenbacher
1
0.22%
1
5.88%
Total
447
100.00%
17
100.00%



static ssize_t sel_read_avc_cache_threshold(struct file *filp, char __user *buf,
					    size_t count, loff_t *ppos)
{
	struct selinux_fs_info *fsi = file_inode(filp)->i_sb->s_fs_info;
	struct selinux_state *state = fsi->state;
	char tmpbuf[TMPBUFLEN];
	ssize_t length;

	length = scnprintf(tmpbuf, TMPBUFLEN, "%u",
			   avc_get_cache_threshold(state->avc));
	return simple_read_from_buffer(buf, count, ppos, tmpbuf, length);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
James Morris
47
54.02%
1
33.33%
Stephen D. Smalley
29
33.33%
1
33.33%
Andrew Morton
11
12.64%
1
33.33%
Total
87
100.00%
3
100.00%



static ssize_t sel_write_avc_cache_threshold(struct file *file,
					     const char __user *buf,
					     size_t count, loff_t *ppos)

{
	struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info;
	struct selinux_state *state = fsi->state;
	char *page;
	ssize_t ret;
	unsigned int new_value;

	ret = avc_has_perm(&selinux_state,
			   current_sid(), SECINITSID_SECURITY,
			   SECCLASS_SECURITY, SECURITY__SETSECPARAM,
			   NULL);
	if (ret)
		return ret;

	if (count >= PAGE_SIZE)
		return -ENOMEM;

	/* No partial writes. */
	if (*ppos != 0)
		return -EINVAL;

	page = memdup_user_nul(buf, count);
	if (IS_ERR(page))
		return PTR_ERR(page);

	ret = -EINVAL;
	if (sscanf(page, "%u", &new_value) != 1)
		goto out;

	avc_set_cache_threshold(state->avc, new_value);

	ret = count;
out:
	kfree(page);
	return ret;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
James Morris
88
50.87%
1
11.11%
Stephen D. Smalley
44
25.43%
3
33.33%
Al Viro
20
11.56%
1
11.11%
Eric Paris
17
9.83%
1
11.11%
Andrew Morton
3
1.73%
2
22.22%
Heinrich Schuchardt
1
0.58%
1
11.11%
Total
173
100.00%
9
100.00%



static ssize_t sel_read_avc_hash_stats(struct file *filp, char __user *buf,
				       size_t count, loff_t *ppos)
{
	struct selinux_fs_info *fsi = file_inode(filp)->i_sb->s_fs_info;
	struct selinux_state *state = fsi->state;
	char *page;
	ssize_t length;

	page = (char *)__get_free_page(GFP_KERNEL);
	if (!page)
		return -ENOMEM;

	length = avc_get_hash_stats(state->avc, page);
	if (length >= 0)
		length = simple_read_from_buffer(buf, count, ppos, page, length);
	free_page((unsigned long)page);

	return length;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
James Morris
82
70.09%
1
33.33%
Stephen D. Smalley
27
23.08%
1
33.33%
Eric Paris
8
6.84%
1
33.33%
Total
117
100.00%
3
100.00%


static const struct file_operations sel_avc_cache_threshold_ops = {
	.read		= sel_read_avc_cache_threshold,
	.write		= sel_write_avc_cache_threshold,
	.llseek		= generic_file_llseek,
};


static const struct file_operations sel_avc_hash_stats_ops = {
	.read		= sel_read_avc_hash_stats,
	.llseek		= generic_file_llseek,
};

#ifdef CONFIG_SECURITY_SELINUX_AVC_STATS


static struct avc_cache_stats *sel_avc_get_stat_idx(loff_t *idx)
{
	int cpu;

	for (cpu = *idx; cpu < nr_cpu_ids; ++cpu) {
		if (!cpu_possible(cpu))
			continue;
		*idx = cpu + 1;
		return &per_cpu(avc_cache_stats, cpu);
	}
	return NULL;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
James Morris
58
98.31%
1
50.00%
Rusty Russell
1
1.69%
1
50.00%
Total
59
100.00%
2
100.00%



static void *sel_avc_stats_seq_start(struct seq_file *seq, loff_t *pos)
{
	loff_t n = *pos - 1;

	if (*pos == 0)
		return SEQ_START_TOKEN;

	return sel_avc_get_stat_idx(&n);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
James Morris
41
100.00%
1
100.00%
Total
41
100.00%
1
100.00%



static void *sel_avc_stats_seq_next(struct seq_file *seq, void *v, loff_t *pos)
{
	return sel_avc_get_stat_idx(pos);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
James Morris
26
100.00%
1
100.00%
Total
26
100.00%
1
100.00%



static int sel_avc_stats_seq_show(struct seq_file *seq, void *v)
{
	struct avc_cache_stats *st = v;

	if (v == SEQ_START_TOKEN) {
		seq_puts(seq,
			 "lookups hits misses allocations reclaims frees\n");
	} else {
		unsigned int lookups = st->lookups;
		unsigned int misses = st->misses;
		unsigned int hits = lookups - misses;
		seq_printf(seq, "%u %u %u %u %u %u\n", lookups,
			   hits, misses, st->allocations,
			   st->reclaims, st->frees);
	}
	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
James Morris
62
67.39%
1
33.33%
Linus Torvalds
26
28.26%
1
33.33%
SF Markus Elfring
4
4.35%
1
33.33%
Total
92
100.00%
3
100.00%



static void sel_avc_stats_seq_stop(struct seq_file *seq, void *v)
{ }

Contributors
Person
Tokens
Prop
Commits
CommitProp
James Morris
14
100.00%
1
100.00%
Total
14
100.00%
1
100.00%


static const struct seq_operations sel_avc_cache_stats_seq_ops = {
	.start		= sel_avc_stats_seq_start,
	.next		= sel_avc_stats_seq_next,
	.show		= sel_avc_stats_seq_show,
	.stop		= sel_avc_stats_seq_stop,
};



static int sel_open_avc_cache_stats(struct inode *inode, struct file *file)
{
	return seq_open(file, &sel_avc_cache_stats_seq_ops);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
James Morris
25
100.00%
1
100.00%
Total
25
100.00%
1
100.00%


static const struct file_operations sel_avc_cache_stats_ops = {
	.open		= sel_open_avc_cache_stats,
	.read		= seq_read,
	.llseek		= seq_lseek,
	.release	= seq_release,
};
#endif



static int sel_make_avc_files(struct dentry *dir)
{
	struct super_block *sb = dir->d_sb;
	struct selinux_fs_info *fsi = sb->s_fs_info;
	int i;
	static const struct tree_descr files[] = {
		{ "cache_threshold",
		  &sel_avc_cache_threshold_ops, S_IRUGO|S_IWUSR },
		{ "hash_stats", &sel_avc_hash_stats_ops, S_IRUGO },
#ifdef CONFIG_SECURITY_SELINUX_AVC_STATS
		{ "cache_stats", &sel_avc_cache_stats_ops, S_IRUGO },
#endif
	};

	for (i = 0; i < ARRAY_SIZE(files); i++) {
		struct inode *inode;
		struct dentry *dentry;

		dentry = d_alloc_name(dir, files[i].name);
		if (!dentry)
			return -ENOMEM;

		inode = sel_make_inode(dir->d_sb, S_IFREG|files[i].mode);
		if (!inode)
			return -ENOMEM;

		inode->i_fop = files[i].ops;
		inode->i_ino = ++fsi->last_ino;
		d_add(dentry, inode);
	}

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
James Morris
150
81.52%
1
16.67%
Stephen D. Smalley
21
11.41%
1
16.67%
James Carter
6
3.26%
1
16.67%
Eric Paris
5
2.72%
1
16.67%
Eric Biggers
1
0.54%
1
16.67%
Nicolas Kaiser
1
0.54%
1
16.67%
Total
184
100.00%
6
100.00%



static ssize_t sel_read_initcon(struct file *file, char __user *buf,
				size_t count, loff_t *ppos)
{
	struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info;
	char *con;
	u32 sid, len;
	ssize_t ret;

	sid = file_inode(file)->i_ino&SEL_INO_MASK;
	ret = security_sid_to_context(fsi->state, sid, &con, &len);
	if (ret)
		return ret;

	ret = simple_read_from_buffer(buf, count, ppos, con, len);
	kfree(con);
	return ret;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
James Carter
85
79.44%
1
25.00%
Stephen D. Smalley
18
16.82%
2
50.00%
Al Viro
4
3.74%
1
25.00%
Total
107
100.00%
4
100.00%


static const struct file_operations sel_initcon_ops = {
	.read		= sel_read_initcon,
	.llseek		= generic_file_llseek,
};



static int sel_make_initcon_files(struct dentry *dir)
{
	int i;

	for (i = 1; i <= SECINITSID_NUM; i++) {
		struct inode *inode;
		struct dentry *dentry;
		dentry = d_alloc_name(dir, security_get_initial_sid_context(i));
		if (!dentry)
			return -ENOMEM;

		inode = sel_make_inode(dir->d_sb, S_IFREG|S_IRUGO);
		if (!inode)
			return -ENOMEM;

		inode->i_fop = &sel_initcon_ops;
		inode->i_ino = i|SEL_INITCON_INO_OFFSET;
		d_add(dentry, inode);
	}

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
James Carter
102
95.33%
1
50.00%
Eric Paris
5
4.67%
1
50.00%
Total
107
100.00%
2
100.00%



static inline unsigned long sel_class_to_ino(u16 class)
{
	return (class * (SEL_VEC_MAX + 1)) | SEL_CLASS_INO_OFFSET;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Christopher J. PeBenito
24
100.00%
2
100.00%
Total
24
100.00%
2
100.00%



static inline u16 sel_ino_to_class(unsigned long ino)
{
	return (ino & SEL_INO_MASK) / (SEL_VEC_MAX + 1);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Christopher J. PeBenito
17
70.83%
1
33.33%
Eric Paris
5
20.83%
1
33.33%
James Morris
2
8.33%
1
33.33%
Total
24
100.00%
3
100.00%



static inline unsigned long sel_perm_to_ino(u16 class, u32 perm)
{
	return (class * (SEL_VEC_MAX + 1) + perm) | SEL_CLASS_INO_OFFSET;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Christopher J. PeBenito
24
82.76%
1
50.00%
James Morris
5
17.24%
1
50.00%
Total
29
100.00%
2
100.00%



static inline u32 sel_ino_to_perm(unsigned long ino)
{
	return (ino & SEL_INO_MASK) % (SEL_VEC_MAX + 1);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Christopher J. PeBenito
24
100.00%
1
100.00%
Total
24
100.00%
1
100.00%



static ssize_t sel_read_class(struct file *file, char __user *buf,
				size_t count, loff_t *ppos)
{
	unsigned long ino = file_inode(file)->i_ino;
	char res[TMPBUFLEN];
	ssize_t len = snprintf(res, sizeof(res), "%d", sel_ino_to_class(ino));
	return simple_read_from_buffer(buf, count, ppos, res, len);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Christopher J. PeBenito
56
75.68%
1
33.33%
Al Viro
18
24.32%
2
66.67%
Total
74
100.00%
3
100.00%


static const struct file_operations sel_class_ops = {
	.read		= sel_read_class,
	.llseek		= generic_file_llseek,
};



static ssize_t sel_read_perm(struct file *file, char __user *buf,
				size_t count, loff_t *ppos)
{
	unsigned long ino = file_inode(file)->i_ino;
	char res[TMPBUFLEN];
	ssize_t len = snprintf(res, sizeof(res), "%d", sel_ino_to_perm(ino));
	return simple_read_from_buffer(buf, count, ppos, res, len);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Christopher J. PeBenito
56
75.68%
1
33.33%
Al Viro
18
24.32%
2
66.67%
Total
74
100.00%
3
100.00%


static const struct file_operations sel_perm_ops = {
	.read		= sel_read_perm,
	.llseek		= generic_file_llseek,
};



static ssize_t sel_read_policycap(struct file *file, char __user *buf,
				  size_t count, loff_t *ppos)
{
	struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info;
	int value;
	char tmpbuf[TMPBUFLEN];
	ssize_t length;
	unsigned long i_ino = file_inode(file)->i_ino;

	value = security_policycap_supported(fsi->state, i_ino & SEL_INO_MASK);
	length = scnprintf(tmpbuf, TMPBUFLEN, "%d", value);

	return simple_read_from_buffer(buf, count, ppos, tmpbuf, length);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Paul Moore
79
79.00%
1
25.00%
Stephen D. Smalley
18
18.00%
2
50.00%
Al Viro
3
3.00%
1
25.00%
Total
100
100.00%
4
100.00%


static const struct file_operations sel_policycap_ops = {
	.read		= sel_read_policycap,
	.llseek		= generic_file_llseek,
};



static int sel_make_perm_files(char *objclass, int classvalue,
				struct dentry *dir)
{
	struct selinux_fs_info *fsi = dir->d_sb->s_fs_info;
	int i, rc, nperms;
	char **perms;

	rc = security_get_permissions(fsi->state, objclass, &perms, &nperms);
	if (rc)
		return rc;

	for (i = 0; i < nperms; i++) {
		struct inode *inode;
		struct dentry *dentry;

		rc = -ENOMEM;
		dentry = d_alloc_name(dir, perms[i]);
		if (!dentry)
			goto out;

		rc = -ENOMEM;
		inode = sel_make_inode(dir->d_sb, S_IFREG|S_IRUGO);
		if (!inode)
			goto out;

		inode->i_fop = &sel_perm_ops;
		/* i+1 since perm values are 1-indexed */
		inode->i_ino = sel_perm_to_ino(classvalue, i + 1);
		d_add(dentry, inode);
	}
	rc = 0;
out:
	for (i = 0; i < nperms; i++)
		kfree(perms[i]);
	kfree(perms);
	return rc;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Christopher J. PeBenito
172
84.31%
1
25.00%
Eric Paris
17
8.33%
1
25.00%
Stephen D. Smalley
15
7.35%
2
50.00%
Total
204
100.00%
4
100.00%



static int sel_make_class_dir_entries(char *classname, int index,
					struct dentry *dir)
{
	struct super_block *sb = dir->d_sb;
	struct selinux_fs_info *fsi = sb->s_fs_info;
	struct dentry *dentry = NULL;
	struct inode *inode = NULL;
	int rc;

	dentry = d_alloc_name(dir, "index");
	if (!dentry)
		return -ENOMEM;

	inode = sel_make_inode(dir->d_sb, S_IFREG|S_IRUGO);
	if (!inode)
		return -ENOMEM;

	inode->i_fop = &sel_class_ops;
	inode->i_ino = sel_class_to_ino(index);
	d_add(dentry, inode);

	dentry = sel_make_dir(dir, "perms", &fsi->last_class_ino);
	if (IS_ERR(dentry))
		return PTR_ERR(dentry);

	rc = sel_make_perm_files(classname, index, dentry);

	return rc;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Christopher J. PeBenito
123
78.34%
1
25.00%
Stephen D. Smalley
20
12.74%
1
25.00%
Al Viro
8
5.10%
1
25.00%
Eric Paris
6
3.82%
1
25.00%
Total
157
100.00%
4
100.00%



static int sel_make_classes(struct selinux_fs_info *fsi)
{

	int rc, nclasses, i;
	char **classes;

	/* delete any existing entries */
	sel_remove_entries(fsi->class_dir);

	rc = security_get_classes(fsi->state, &classes, &nclasses);
	if (rc)
		return rc;

	/* +2 since classes are 1-indexed */
	fsi->last_class_ino = sel_class_to_ino(nclasses + 2);

	for (i = 0; i < nclasses; i++) {
		struct dentry *class_name_dir;

		class_name_dir = sel_make_dir(fsi->class_dir, classes[i],
					      &fsi->last_class_ino);
		if (IS_ERR(class_name_dir)) {
			rc = PTR_ERR(class_name_dir);
			goto out;
		}

		/* i+1 since class values are 1-indexed */
		rc = sel_make_class_dir_entries(classes[i], i + 1,
				class_name_dir);
		if (rc)
			goto out;
	}
	rc = 0;
out:
	for (i = 0; i < nclasses; i++)
		kfree(classes[i]);
	kfree(classes);
	return rc;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Christopher J. PeBenito
141
77.47%
1
16.67%
Stephen D. Smalley
17
9.34%
2
33.33%
Al Viro
14
7.69%
2
33.33%
Eric Paris
10
5.49%
1
16.67%
Total
182
100.00%
6
100.00%



static int sel_make_policycap(struct selinux_fs_info *fsi)
{
	unsigned int iter;
	struct dentry *dentry = NULL;
	struct inode *inode = NULL;

	sel_remove_entries(fsi->policycap_dir);

	for (iter = 0; iter <= POLICYDB_CAPABILITY_MAX; iter++) {
		if (iter < ARRAY_SIZE(selinux_policycap_names))
			dentry = d_alloc_name(fsi->policycap_dir,
					      selinux_policycap_names[iter]);
		else
			dentry = d_alloc_name(fsi->policycap_dir, "unknown");

		if (dentry == NULL)
			return -ENOMEM;

		inode = sel_make_inode(fsi->sb, S_IFREG | 0444);
		if (inode == NULL)
			return -ENOMEM;

		inode->i_fop = &sel_policycap_ops;
		inode->i_ino = iter | SEL_POLICYCAP_INO_OFFSET;
		d_add(dentry, inode);
	}

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Paul Moore
129
89.58%
1
33.33%
Stephen D. Smalley
15
10.42%
2
66.67%
Total
144
100.00%
3
100.00%



static struct dentry *sel_make_dir(struct dentry *dir, const char *name,
			unsigned long *ino)
{
	struct dentry *dentry = d_alloc_name(dir, name);
	struct inode *inode;

	if (!dentry)
		return ERR_PTR(-ENOMEM);

	inode = sel_make_inode(dir->d_sb, S_IFDIR | S_IRUGO | S_IXUGO);
	if (!inode) {
		dput(dentry);
		return ERR_PTR(-ENOMEM);
	}

	inode->i_op = &simple_dir_inode_operations;
	inode->i_fop = &simple_dir_operations;
	inode->i_ino = ++(*ino);
	/* directory inodes start off with i_nlink == 2 (for "." entry) */
	inc_nlink(inode);
	d_add(dentry, inode);
	/* bump link count on parent directory, too */
	inc_nlink(d_inode(dir));

	return dentry;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Christopher J. PeBenito
86
63.70%
1
25.00%
Al Viro
44
32.59%
1
25.00%
David Howells
3
2.22%
1
25.00%
Eric Paris
2
1.48%
1
25.00%
Total
135
100.00%
4
100.00%


#define NULL_FILE_NAME "null"



static int sel_fill_super(struct super_block *sb, void *data, int silent)
{
	struct selinux_fs_info *fsi;
	int ret;
	struct dentry *dentry;
	struct inode *inode;
	struct inode_security_struct *isec;

	static const struct tree_descr selinux_files[] = {
		[SEL_LOAD] = {"load", &sel_load_ops, S_IRUSR|S_IWUSR},
		[SEL_ENFORCE] = {"enforce", &sel_enforce_ops, S_IRUGO|S_IWUSR},
		[SEL_CONTEXT] = {"context", &transaction_ops, S_IRUGO|S_IWUGO},
		[SEL_ACCESS] = {"access", &transaction_ops, S_IRUGO|S_IWUGO},
		[SEL_CREATE] = {"create", &transaction_ops, S_IRUGO|S_IWUGO},
		[SEL_RELABEL] = {"relabel", &transaction_ops, S_IRUGO|S_IWUGO},
		[SEL_USER] = {"user", &transaction_ops, S_IRUGO|S_IWUGO},
		[SEL_POLICYVERS] = {"policyvers", &sel_policyvers_ops, S_IRUGO},
		[SEL_COMMIT_BOOLS] = {"commit_pending_bools", &sel_commit_bools_ops, S_IWUSR},
		[SEL_MLS] = {"mls", &sel_mls_ops, S_IRUGO},
		[SEL_DISABLE] = {"disable", &sel_disable_ops, S_IWUSR},
		[SEL_MEMBER] = {"member", &transaction_ops, S_IRUGO|S_IWUGO},
		[SEL_CHECKREQPROT] = {"checkreqprot", &sel_checkreqprot_ops, S_IRUGO|S_IWUSR},
		[SEL_REJECT_UNKNOWN] = {"reject_unknown", &sel_handle_unknown_ops, S_IRUGO},
		[SEL_DENY_UNKNOWN] = {"deny_unknown", &sel_handle_unknown_ops, S_IRUGO},
		[SEL_STATUS] = {"status", &sel_handle_status_ops, S_IRUGO},
		[SEL_POLICY] = {"policy", &sel_policy_ops, S_IRUGO},
		[SEL_VALIDATE_TRANS] = {"validatetrans", &sel_transition_ops,
					S_IWUGO},
		/* last one */ {""}
	};

	ret = selinux_fs_info_create(sb);
	if (ret)
		goto err;

	ret = simple_fill_super(sb, SELINUX_MAGIC, selinux_files);
	if (ret)
		goto err;

	fsi = sb->s_fs_info;
	fsi->bool_dir = sel_make_dir(sb->s_root, BOOL_DIR_NAME, &fsi->last_ino);
	if (IS_ERR(fsi->bool_dir)) {
		ret = PTR_ERR(fsi->bool_dir);
		fsi->bool_dir = NULL;
		goto err;
	}

	ret = -ENOMEM;
	dentry = d_alloc_name(sb->s_root, NULL_FILE_NAME);
	if (!dentry)
		goto err;

	ret = -ENOMEM;
	inode = sel_make_inode(sb, S_IFCHR | S_IRUGO | S_IWUGO);
	if (!inode)
		goto err;

	inode->i_ino = ++fsi->last_ino;
	isec = (struct inode_security_struct *)inode->i_security;
	isec->sid = SECINITSID_DEVNULL;
	isec->sclass = SECCLASS_CHR_FILE;
	isec->initialized = LABEL_INITIALIZED;

	init_special_inode(inode, S_IFCHR | S_IRUGO | S_IWUGO, MKDEV(MEM_MAJOR, 3));
	d_add(dentry, inode);

	dentry = sel_make_dir(sb->s_root, "avc", &fsi->last_ino);
	if (IS_ERR(dentry)) {
		ret = PTR_ERR(dentry);
		goto err;
	}

	ret = sel_make_avc_files(dentry);
	if (ret)
		goto err;

	dentry = sel_make_dir(sb->s_root, "initial_contexts", &fsi->last_ino);
	if (IS_ERR(dentry)) {
		ret = PTR_ERR(dentry);
		goto err;
	}

	ret = sel_make_initcon_files(dentry);
	if (ret)
		goto err;

	fsi->class_dir = sel_make_dir(sb->s_root, "class", &fsi->last_ino);
	if (IS_ERR(fsi->class_dir)) {
		ret = PTR_ERR(fsi->class_dir);
		fsi->class_dir = NULL;
		goto err;
	}

	fsi->policycap_dir = sel_make_dir(sb->s_root, "policy_capabilities",
					  &fsi->last_ino);
	if (IS_ERR(fsi->policycap_dir)) {
		ret = PTR_ERR(fsi->policycap_dir);
		fsi->policycap_dir = NULL;
		goto err;
	}

	ret = sel_make_policy_nodes(fsi);
	if (ret)
		goto err;
	return 0;
err:
	printk(KERN_ERR "SELinux: %s:  failed while creating inodes\n",
		__func__);

	selinux_fs_info_free(sb);

	return ret;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Stephen D. Smalley
207
28.28%
5
17.24%
James Morris
136
18.58%
5
17.24%
Andrew Morton
120
16.39%
4
13.79%
Al Viro
66
9.02%
1
3.45%
Christopher J. PeBenito
59
8.06%
1
3.45%
Eric Paris
52
7.10%
5
17.24%
James Carter
43
5.87%
2
6.90%
Paul Moore
20
2.73%
1
3.45%
Andrew Perepechko
13
1.78%
1
3.45%
KaiGai Kohei
13
1.78%
1
3.45%
Eric Biggers
1
0.14%
1
3.45%
Harvey Harrison
1
0.14%
1
3.45%
Andreas Gruenbacher
1
0.14%
1
3.45%
Total
732
100.00%
29
100.00%



static struct dentry *sel_mount(struct file_system_type *fs_type,
		      int flags, const char *dev_name, void *data)
{
	return mount_single(fs_type, flags, data, sel_fill_super);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Andrew Morton
32
86.49%
1
50.00%
Al Viro
5
13.51%
1
50.00%
Total
37
100.00%
2
100.00%



static void sel_kill_sb(struct super_block *sb)
{
	selinux_fs_info_free(sb);
	kill_litter_super(sb);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Stephen D. Smalley
21
100.00%
1
100.00%
Total
21
100.00%
1
100.00%


static struct file_system_type sel_fs_type = {
	.name		= "selinuxfs",
	.mount		= sel_mount,
	.kill_sb	= sel_kill_sb,
};


struct vfsmount *selinuxfs_mount;

struct path selinux_null;



static int __init init_sel_fs(void)
{
	struct qstr null_name = QSTR_INIT(NULL_FILE_NAME,
					  sizeof(NULL_FILE_NAME)-1);
	int err;

	if (!selinux_enabled)
		return 0;

	err = sysfs_create_mount_point(fs_kobj, "selinux");
	if (err)
		return err;

	err = register_filesystem(&sel_fs_type);
	if (err) {
		sysfs_remove_mount_point(fs_kobj, "selinux");
		return err;
	}

	selinux_null.mnt = selinuxfs_mount = kern_mount(&sel_fs_type);
	if (IS_ERR(selinuxfs_mount)) {
		printk(KERN_ERR "selinuxfs:  could not mount!\n");
		err = PTR_ERR(selinuxfs_mount);
		selinuxfs_mount = NULL;
	}
	selinux_null.dentry = d_hash_and_lookup(selinux_null.mnt->mnt_root,
						&null_name);
	if (IS_ERR(selinux_null.dentry)) {
		pr_err("selinuxfs:  could not lookup null!\n");
		err = PTR_ERR(selinux_null.dentry);
		selinux_null.dentry = NULL;
	}

	return err;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Stephen D. Smalley
116
70.73%
2
25.00%
Andrew Morton
16
9.76%
2
25.00%
Greg Kroah-Hartman
15
9.15%
1
12.50%
Eric W. Biedermann
10
6.10%
1
12.50%
Al Viro
4
2.44%
1
12.50%
Eric Paris
3
1.83%
1
12.50%
Total
164
100.00%
8
100.00%

__initcall(init_sel_fs);

#ifdef CONFIG_SECURITY_SELINUX_DISABLE


void exit_sel_fs(void)
{
	sysfs_remove_mount_point(fs_kobj, "selinux");
	dput(selinux_null.dentry);
	kern_unmount(selinuxfs_mount);
	unregister_filesystem(&sel_fs_type);
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Andrew Morton
13
40.62%
1
20.00%
Stephen D. Smalley
7
21.88%
1
20.00%
Tim Chen
5
15.62%
1
20.00%
Eric W. Biedermann
4
12.50%
1
20.00%
Greg Kroah-Hartman
3
9.38%
1
20.00%
Total
32
100.00%
5
100.00%

#endif
Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
Andrew Morton
2858
28.38%
6
5.66%
Stephen D. Smalley
2276
22.60%
15
14.15%
Eric Paris
1013
10.06%
13
12.26%
James Morris
875
8.69%
9
8.49%
Christopher J. PeBenito
838
8.32%
3
2.83%
Andrew Perepechko
349
3.47%
1
0.94%
Al Viro
325
3.23%
10
9.43%
James Carter
272
2.70%
3
2.83%
Paul Moore
257
2.55%
3
2.83%
KaiGai Kohei
255
2.53%
2
1.89%
Kohei Kaigai
169
1.68%
2
1.89%
Jann Horn
109
1.08%
1
0.94%
Arnd Bergmann
80
0.79%
1
0.94%
Chris Wright
70
0.70%
1
0.94%
Steve Grubb
51
0.51%
1
0.94%
Eric W. Biedermann
32
0.32%
2
1.89%
Richard Guy Briggs
31
0.31%
3
2.83%
Linus Torvalds
26
0.26%
1
0.94%
Gary Tierney
23
0.23%
2
1.89%
Xiaotian Feng
21
0.21%
1
0.94%
Greg Kroah-Hartman
21
0.21%
1
0.94%
Nikolay Aleksandrov
20
0.20%
1
0.94%
Arjan van de Ven
12
0.12%
1
0.94%
Daniel Jurgens
11
0.11%
1
0.94%
Andy Shevchenko
10
0.10%
1
0.94%
Davi Arnaut
9
0.09%
1
0.94%
Ingo Molnar
9
0.09%
1
0.94%
Rasmus Villemoes
9
0.09%
1
0.94%
Tim Chen
5
0.05%
1
0.94%
SF Markus Elfring
4
0.04%
1
0.94%
Harvey Harrison
4
0.04%
1
0.94%
Deepa Dinamani
4
0.04%
1
0.94%
David Howells
3
0.03%
1
0.94%
Konstantin Khlebnikov
3
0.03%
1
0.94%
Andreas Gruenbacher
2
0.02%
1
0.94%
Dave Jiang
2
0.02%
1
0.94%
Nicholas Piggin
2
0.02%
1
0.94%
Eric Biggers
2
0.02%
1
0.94%
Nicolas Kaiser
2
0.02%
1
0.94%
Souptick Joarder
1
0.01%
1
0.94%
Joe Perches
1
0.01%
1
0.94%
Guido Trentalancia
1
0.01%
1
0.94%
Jan Engelhardt
1
0.01%
1
0.94%
Heinrich Schuchardt
1
0.01%
1
0.94%
Rusty Russell
1
0.01%
1
0.94%
Kirill A. Shutemov
1
0.01%
1
0.94%
Total
10071
100.00%
106
100.00%
Directory: security/selinux

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