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-rw-r--r--fs/9p/Kconfig13
-rw-r--r--fs/9p/Makefile4
-rw-r--r--fs/9p/xattr.c4
-rw-r--r--fs/9p/xattr.h2
-rw-r--r--fs/9p/xattr_security.c80
-rw-r--r--fs/9p/xattr_trusted.c80
6 files changed, 182 insertions, 1 deletions
diff --git a/fs/9p/Kconfig b/fs/9p/Kconfig
index 55abfd62654a..6489e1fc1afd 100644
--- a/fs/9p/Kconfig
+++ b/fs/9p/Kconfig
@@ -31,3 +31,16 @@ config 9P_FS_POSIX_ACL
If you don't know what Access Control Lists are, say N
endif
+
+
+config 9P_FS_SECURITY
+ bool "9P Security Labels"
+ depends on 9P_FS
+ help
+ Security labels support alternative access control models
+ implemented by security modules like SELinux. This option
+ enables an extended attribute handler for file security
+ labels in the 9P filesystem.
+
+ If you are not using a security module that requires using
+ extended attributes for file security labels, say N.
diff --git a/fs/9p/Makefile b/fs/9p/Makefile
index ab8c12780634..ff7be98f84f2 100644
--- a/fs/9p/Makefile
+++ b/fs/9p/Makefile
@@ -11,7 +11,9 @@ obj-$(CONFIG_9P_FS) := 9p.o
v9fs.o \
fid.o \
xattr.o \
- xattr_user.o
+ xattr_user.o \
+ xattr_trusted.o
9p-$(CONFIG_9P_FSCACHE) += cache.o
9p-$(CONFIG_9P_FS_POSIX_ACL) += acl.o
+9p-$(CONFIG_9P_FS_SECURITY) += xattr_security.o
diff --git a/fs/9p/xattr.c b/fs/9p/xattr.c
index c45e016b190f..3c28cdfb8c47 100644
--- a/fs/9p/xattr.c
+++ b/fs/9p/xattr.c
@@ -167,9 +167,13 @@ ssize_t v9fs_listxattr(struct dentry *dentry, char *buffer, size_t buffer_size)
const struct xattr_handler *v9fs_xattr_handlers[] = {
&v9fs_xattr_user_handler,
+ &v9fs_xattr_trusted_handler,
#ifdef CONFIG_9P_FS_POSIX_ACL
&v9fs_xattr_acl_access_handler,
&v9fs_xattr_acl_default_handler,
#endif
+#ifdef CONFIG_9P_FS_SECURITY
+ &v9fs_xattr_security_handler,
+#endif
NULL
};
diff --git a/fs/9p/xattr.h b/fs/9p/xattr.h
index eec348a3df71..d3e2ea3840be 100644
--- a/fs/9p/xattr.h
+++ b/fs/9p/xattr.h
@@ -20,6 +20,8 @@
extern const struct xattr_handler *v9fs_xattr_handlers[];
extern struct xattr_handler v9fs_xattr_user_handler;
+extern struct xattr_handler v9fs_xattr_trusted_handler;
+extern struct xattr_handler v9fs_xattr_security_handler;
extern const struct xattr_handler v9fs_xattr_acl_access_handler;
extern const struct xattr_handler v9fs_xattr_acl_default_handler;
diff --git a/fs/9p/xattr_security.c b/fs/9p/xattr_security.c
new file mode 100644
index 000000000000..cb247a142a6e
--- /dev/null
+++ b/fs/9p/xattr_security.c
@@ -0,0 +1,80 @@
+/*
+ * Copyright IBM Corporation, 2010
+ * Author Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of version 2.1 of the GNU Lesser General Public License
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it would be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ */
+
+
+#include <linux/module.h>
+#include <linux/string.h>
+#include <linux/fs.h>
+#include <linux/slab.h>
+#include "xattr.h"
+
+static int v9fs_xattr_security_get(struct dentry *dentry, const char *name,
+ void *buffer, size_t size, int type)
+{
+ int retval;
+ char *full_name;
+ size_t name_len;
+ size_t prefix_len = XATTR_SECURITY_PREFIX_LEN;
+
+ if (name == NULL)
+ return -EINVAL;
+
+ if (strcmp(name, "") == 0)
+ return -EINVAL;
+
+ name_len = strlen(name);
+ full_name = kmalloc(prefix_len + name_len + 1 , GFP_KERNEL);
+ if (!full_name)
+ return -ENOMEM;
+ memcpy(full_name, XATTR_SECURITY_PREFIX, prefix_len);
+ memcpy(full_name+prefix_len, name, name_len);
+ full_name[prefix_len + name_len] = '\0';
+
+ retval = v9fs_xattr_get(dentry, full_name, buffer, size);
+ kfree(full_name);
+ return retval;
+}
+
+static int v9fs_xattr_security_set(struct dentry *dentry, const char *name,
+ const void *value, size_t size, int flags, int type)
+{
+ int retval;
+ char *full_name;
+ size_t name_len;
+ size_t prefix_len = XATTR_SECURITY_PREFIX_LEN;
+
+ if (name == NULL)
+ return -EINVAL;
+
+ if (strcmp(name, "") == 0)
+ return -EINVAL;
+
+ name_len = strlen(name);
+ full_name = kmalloc(prefix_len + name_len + 1 , GFP_KERNEL);
+ if (!full_name)
+ return -ENOMEM;
+ memcpy(full_name, XATTR_SECURITY_PREFIX, prefix_len);
+ memcpy(full_name + prefix_len, name, name_len);
+ full_name[prefix_len + name_len] = '\0';
+
+ retval = v9fs_xattr_set(dentry, full_name, value, size, flags);
+ kfree(full_name);
+ return retval;
+}
+
+struct xattr_handler v9fs_xattr_security_handler = {
+ .prefix = XATTR_SECURITY_PREFIX,
+ .get = v9fs_xattr_security_get,
+ .set = v9fs_xattr_security_set,
+};
diff --git a/fs/9p/xattr_trusted.c b/fs/9p/xattr_trusted.c
new file mode 100644
index 000000000000..e30d33b8a3fb
--- /dev/null
+++ b/fs/9p/xattr_trusted.c
@@ -0,0 +1,80 @@
+/*
+ * Copyright IBM Corporation, 2010
+ * Author Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of version 2.1 of the GNU Lesser General Public License
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it would be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ */
+
+
+#include <linux/module.h>
+#include <linux/string.h>
+#include <linux/fs.h>
+#include <linux/slab.h>
+#include "xattr.h"
+
+static int v9fs_xattr_trusted_get(struct dentry *dentry, const char *name,
+ void *buffer, size_t size, int type)
+{
+ int retval;
+ char *full_name;
+ size_t name_len;
+ size_t prefix_len = XATTR_TRUSTED_PREFIX_LEN;
+
+ if (name == NULL)
+ return -EINVAL;
+
+ if (strcmp(name, "") == 0)
+ return -EINVAL;
+
+ name_len = strlen(name);
+ full_name = kmalloc(prefix_len + name_len + 1 , GFP_KERNEL);
+ if (!full_name)
+ return -ENOMEM;
+ memcpy(full_name, XATTR_TRUSTED_PREFIX, prefix_len);
+ memcpy(full_name+prefix_len, name, name_len);
+ full_name[prefix_len + name_len] = '\0';
+
+ retval = v9fs_xattr_get(dentry, full_name, buffer, size);
+ kfree(full_name);
+ return retval;
+}
+
+static int v9fs_xattr_trusted_set(struct dentry *dentry, const char *name,
+ const void *value, size_t size, int flags, int type)
+{
+ int retval;
+ char *full_name;
+ size_t name_len;
+ size_t prefix_len = XATTR_TRUSTED_PREFIX_LEN;
+
+ if (name == NULL)
+ return -EINVAL;
+
+ if (strcmp(name, "") == 0)
+ return -EINVAL;
+
+ name_len = strlen(name);
+ full_name = kmalloc(prefix_len + name_len + 1 , GFP_KERNEL);
+ if (!full_name)
+ return -ENOMEM;
+ memcpy(full_name, XATTR_TRUSTED_PREFIX, prefix_len);
+ memcpy(full_name + prefix_len, name, name_len);
+ full_name[prefix_len + name_len] = '\0';
+
+ retval = v9fs_xattr_set(dentry, full_name, value, size, flags);
+ kfree(full_name);
+ return retval;
+}
+
+struct xattr_handler v9fs_xattr_trusted_handler = {
+ .prefix = XATTR_TRUSTED_PREFIX,
+ .get = v9fs_xattr_trusted_get,
+ .set = v9fs_xattr_trusted_set,
+};
generated by cgit v1.2.3 (git 2.0.4) at 2024-11-09 15:25:14 +0000