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Message-ID: <20171102171530.7627-2-guro@fb.com>
Date: Thu, 2 Nov 2017 13:15:26 -0400
From: Roman Gushchin <guro@...com>
To: <netdev@...r.kernel.org>
CC: Tejun Heo <tj@...nel.org>, Alexei Starovoitov <ast@...nel.org>,
Daniel Borkmann <daniel@...earbox.net>,
<linux-kernel@...r.kernel.org>, <kernel-team@...com>,
Roman Gushchin <guro@...com>,
"David S . Miller" <davem@...emloft.net>
Subject: [PATCH v3 net-next 1/5] device_cgroup: add DEVCG_ prefix to ACC_* and DEV_* constants
Rename device type and access type constants defined in
security/device_cgroup.c by adding the DEVCG_ prefix.
The reason behind this renaming is to make them global namespace
friendly, as they will be moved to the corresponding header file
by following patches.
Signed-off-by: Roman Gushchin <guro@...com>
Cc: David S. Miller <davem@...emloft.net>
Cc: Tejun Heo <tj@...nel.org>
Cc: Alexei Starovoitov <ast@...nel.org>
Cc: Daniel Borkmann <daniel@...earbox.net>
---
security/device_cgroup.c | 72 ++++++++++++++++++++++++------------------------
1 file changed, 36 insertions(+), 36 deletions(-)
diff --git a/security/device_cgroup.c b/security/device_cgroup.c
index 03c1652c9a1f..76cc0cbbb10d 100644
--- a/security/device_cgroup.c
+++ b/security/device_cgroup.c
@@ -14,14 +14,14 @@
#include <linux/rcupdate.h>
#include <linux/mutex.h>
-#define ACC_MKNOD 1
-#define ACC_READ 2
-#define ACC_WRITE 4
-#define ACC_MASK (ACC_MKNOD | ACC_READ | ACC_WRITE)
+#define DEVCG_ACC_MKNOD 1
+#define DEVCG_ACC_READ 2
+#define DEVCG_ACC_WRITE 4
+#define DEVCG_ACC_MASK (DEVCG_ACC_MKNOD | DEVCG_ACC_READ | DEVCG_ACC_WRITE)
-#define DEV_BLOCK 1
-#define DEV_CHAR 2
-#define DEV_ALL 4 /* this represents all devices */
+#define DEVCG_DEV_BLOCK 1
+#define DEVCG_DEV_CHAR 2
+#define DEVCG_DEV_ALL 4 /* this represents all devices */
static DEFINE_MUTEX(devcgroup_mutex);
@@ -245,21 +245,21 @@ static void set_access(char *acc, short access)
{
int idx = 0;
memset(acc, 0, ACCLEN);
- if (access & ACC_READ)
+ if (access & DEVCG_ACC_READ)
acc[idx++] = 'r';
- if (access & ACC_WRITE)
+ if (access & DEVCG_ACC_WRITE)
acc[idx++] = 'w';
- if (access & ACC_MKNOD)
+ if (access & DEVCG_ACC_MKNOD)
acc[idx++] = 'm';
}
static char type_to_char(short type)
{
- if (type == DEV_ALL)
+ if (type == DEVCG_DEV_ALL)
return 'a';
- if (type == DEV_CHAR)
+ if (type == DEVCG_DEV_CHAR)
return 'c';
- if (type == DEV_BLOCK)
+ if (type == DEVCG_DEV_BLOCK)
return 'b';
return 'X';
}
@@ -286,10 +286,10 @@ static int devcgroup_seq_show(struct seq_file *m, void *v)
* This way, the file remains as a "whitelist of devices"
*/
if (devcgroup->behavior == DEVCG_DEFAULT_ALLOW) {
- set_access(acc, ACC_MASK);
+ set_access(acc, DEVCG_ACC_MASK);
set_majmin(maj, ~0);
set_majmin(min, ~0);
- seq_printf(m, "%c %s:%s %s\n", type_to_char(DEV_ALL),
+ seq_printf(m, "%c %s:%s %s\n", type_to_char(DEVCG_DEV_ALL),
maj, min, acc);
} else {
list_for_each_entry_rcu(ex, &devcgroup->exceptions, list) {
@@ -308,10 +308,10 @@ static int devcgroup_seq_show(struct seq_file *m, void *v)
/**
* match_exception - iterates the exception list trying to find a complete match
* @exceptions: list of exceptions
- * @type: device type (DEV_BLOCK or DEV_CHAR)
+ * @type: device type (DEVCG_DEV_BLOCK or DEVCG_DEV_CHAR)
* @major: device file major number, ~0 to match all
* @minor: device file minor number, ~0 to match all
- * @access: permission mask (ACC_READ, ACC_WRITE, ACC_MKNOD)
+ * @access: permission mask (DEVCG_ACC_READ, DEVCG_ACC_WRITE, DEVCG_ACC_MKNOD)
*
* It is considered a complete match if an exception is found that will
* contain the entire range of provided parameters.
@@ -324,9 +324,9 @@ static bool match_exception(struct list_head *exceptions, short type,
struct dev_exception_item *ex;
list_for_each_entry_rcu(ex, exceptions, list) {
- if ((type & DEV_BLOCK) && !(ex->type & DEV_BLOCK))
+ if ((type & DEVCG_DEV_BLOCK) && !(ex->type & DEVCG_DEV_BLOCK))
continue;
- if ((type & DEV_CHAR) && !(ex->type & DEV_CHAR))
+ if ((type & DEVCG_DEV_CHAR) && !(ex->type & DEVCG_DEV_CHAR))
continue;
if (ex->major != ~0 && ex->major != major)
continue;
@@ -343,10 +343,10 @@ static bool match_exception(struct list_head *exceptions, short type,
/**
* match_exception_partial - iterates the exception list trying to find a partial match
* @exceptions: list of exceptions
- * @type: device type (DEV_BLOCK or DEV_CHAR)
+ * @type: device type (DEVCG_DEV_BLOCK or DEVCG_DEV_CHAR)
* @major: device file major number, ~0 to match all
* @minor: device file minor number, ~0 to match all
- * @access: permission mask (ACC_READ, ACC_WRITE, ACC_MKNOD)
+ * @access: permission mask (DEVCG_ACC_READ, DEVCG_ACC_WRITE, DEVCG_ACC_MKNOD)
*
* It is considered a partial match if an exception's range is found to
* contain *any* of the devices specified by provided parameters. This is
@@ -361,9 +361,9 @@ static bool match_exception_partial(struct list_head *exceptions, short type,
struct dev_exception_item *ex;
list_for_each_entry_rcu(ex, exceptions, list) {
- if ((type & DEV_BLOCK) && !(ex->type & DEV_BLOCK))
+ if ((type & DEVCG_DEV_BLOCK) && !(ex->type & DEVCG_DEV_BLOCK))
continue;
- if ((type & DEV_CHAR) && !(ex->type & DEV_CHAR))
+ if ((type & DEVCG_DEV_CHAR) && !(ex->type & DEVCG_DEV_CHAR))
continue;
/*
* We must be sure that both the exception and the provided
@@ -646,10 +646,10 @@ static int devcgroup_update_access(struct dev_cgroup *devcgroup,
}
return 0;
case 'b':
- ex.type = DEV_BLOCK;
+ ex.type = DEVCG_DEV_BLOCK;
break;
case 'c':
- ex.type = DEV_CHAR;
+ ex.type = DEVCG_DEV_CHAR;
break;
default:
return -EINVAL;
@@ -702,13 +702,13 @@ static int devcgroup_update_access(struct dev_cgroup *devcgroup,
for (b++, count = 0; count < 3; count++, b++) {
switch (*b) {
case 'r':
- ex.access |= ACC_READ;
+ ex.access |= DEVCG_ACC_READ;
break;
case 'w':
- ex.access |= ACC_WRITE;
+ ex.access |= DEVCG_ACC_WRITE;
break;
case 'm':
- ex.access |= ACC_MKNOD;
+ ex.access |= DEVCG_ACC_MKNOD;
break;
case '\n':
case '\0':
@@ -805,7 +805,7 @@ struct cgroup_subsys devices_cgrp_subsys = {
* @type: device type
* @major: device major number
* @minor: device minor number
- * @access: combination of ACC_WRITE, ACC_READ and ACC_MKNOD
+ * @access: combination of DEVCG_ACC_WRITE, DEVCG_ACC_READ and DEVCG_ACC_MKNOD
*
* returns 0 on success, -EPERM case the operation is not permitted
*/
@@ -838,13 +838,13 @@ int __devcgroup_inode_permission(struct inode *inode, int mask)
short type, access = 0;
if (S_ISBLK(inode->i_mode))
- type = DEV_BLOCK;
+ type = DEVCG_DEV_BLOCK;
if (S_ISCHR(inode->i_mode))
- type = DEV_CHAR;
+ type = DEVCG_DEV_CHAR;
if (mask & MAY_WRITE)
- access |= ACC_WRITE;
+ access |= DEVCG_ACC_WRITE;
if (mask & MAY_READ)
- access |= ACC_READ;
+ access |= DEVCG_ACC_READ;
return __devcgroup_check_permission(type, imajor(inode), iminor(inode),
access);
@@ -858,11 +858,11 @@ int devcgroup_inode_mknod(int mode, dev_t dev)
return 0;
if (S_ISBLK(mode))
- type = DEV_BLOCK;
+ type = DEVCG_DEV_BLOCK;
else
- type = DEV_CHAR;
+ type = DEVCG_DEV_CHAR;
return __devcgroup_check_permission(type, MAJOR(dev), MINOR(dev),
- ACC_MKNOD);
+ DEVCG_ACC_MKNOD);
}
--
2.13.6
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