TOMOYO: Use callback for permission check.
We can use callback function since parameters are passed via
"const struct tomoyo_request_info".
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: James Morris <jmorris@namei.org>
diff --git a/security/tomoyo/file.c b/security/tomoyo/file.c
index 32661df..18969e7 100644
--- a/security/tomoyo/file.c
+++ b/security/tomoyo/file.c
@@ -218,6 +218,108 @@
return false;
}
+/**
+ * tomoyo_audit_path_log - Audit path request log.
+ *
+ * @r: Pointer to "struct tomoyo_request_info".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int tomoyo_audit_path_log(struct tomoyo_request_info *r)
+{
+ const char *operation = tomoyo_path_keyword[r->param.path.operation];
+ const struct tomoyo_path_info *filename = r->param.path.filename;
+ if (r->granted)
+ return 0;
+ tomoyo_warn_log(r, "%s %s", operation, filename->name);
+ return tomoyo_supervisor(r, "allow_%s %s\n", operation,
+ tomoyo_file_pattern(filename));
+}
+
+/**
+ * tomoyo_audit_path2_log - Audit path/path request log.
+ *
+ * @r: Pointer to "struct tomoyo_request_info".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int tomoyo_audit_path2_log(struct tomoyo_request_info *r)
+{
+ const char *operation = tomoyo_path2_keyword[r->param.path2.operation];
+ const struct tomoyo_path_info *filename1 = r->param.path2.filename1;
+ const struct tomoyo_path_info *filename2 = r->param.path2.filename2;
+ if (r->granted)
+ return 0;
+ tomoyo_warn_log(r, "%s %s %s", operation, filename1->name,
+ filename2->name);
+ return tomoyo_supervisor(r, "allow_%s %s %s\n", operation,
+ tomoyo_file_pattern(filename1),
+ tomoyo_file_pattern(filename2));
+}
+
+/**
+ * tomoyo_audit_mkdev_log - Audit path/number/number/number request log.
+ *
+ * @r: Pointer to "struct tomoyo_request_info".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int tomoyo_audit_mkdev_log(struct tomoyo_request_info *r)
+{
+ const char *operation = tomoyo_path_number32keyword(r->param.mkdev.
+ operation);
+ const struct tomoyo_path_info *filename = r->param.mkdev.filename;
+ const unsigned int major = r->param.mkdev.major;
+ const unsigned int minor = r->param.mkdev.minor;
+ const unsigned int mode = r->param.mkdev.mode;
+ if (r->granted)
+ return 0;
+ tomoyo_warn_log(r, "%s %s 0%o %u %u", operation, filename->name, mode,
+ major, minor);
+ return tomoyo_supervisor(r, "allow_%s %s 0%o %u %u\n", operation,
+ tomoyo_file_pattern(filename), mode, major,
+ minor);
+}
+
+/**
+ * tomoyo_audit_path_number_log - Audit path/number request log.
+ *
+ * @r: Pointer to "struct tomoyo_request_info".
+ * @error: Error code.
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int tomoyo_audit_path_number_log(struct tomoyo_request_info *r)
+{
+ const u8 type = r->param.path_number.operation;
+ u8 radix;
+ const struct tomoyo_path_info *filename = r->param.path_number.filename;
+ const char *operation = tomoyo_path_number_keyword[type];
+ char buffer[64];
+ if (r->granted)
+ return 0;
+ switch (type) {
+ case TOMOYO_TYPE_CREATE:
+ case TOMOYO_TYPE_MKDIR:
+ case TOMOYO_TYPE_MKFIFO:
+ case TOMOYO_TYPE_MKSOCK:
+ case TOMOYO_TYPE_CHMOD:
+ radix = TOMOYO_VALUE_TYPE_OCTAL;
+ break;
+ case TOMOYO_TYPE_IOCTL:
+ radix = TOMOYO_VALUE_TYPE_HEXADECIMAL;
+ break;
+ default:
+ radix = TOMOYO_VALUE_TYPE_DECIMAL;
+ break;
+ }
+ tomoyo_print_ulong(buffer, sizeof(buffer), r->param.path_number.number,
+ radix);
+ tomoyo_warn_log(r, "%s %s %s", operation, filename->name, buffer);
+ return tomoyo_supervisor(r, "allow_%s %s %s\n", operation,
+ tomoyo_file_pattern(filename), buffer);
+}
+
static int tomoyo_update_path2_acl(const u8 type, const char *filename1,
const char *filename2,
struct tomoyo_domain_info *const domain,
@@ -637,37 +739,52 @@
return done;
}
-/**
- * tomoyo_path_acl - Check permission for single path operation.
- *
- * @r: Pointer to "struct tomoyo_request_info".
- * @filename: Filename to check.
- * @perm: Permission.
- *
- * Returns 0 on success, -EPERM otherwise.
- *
- * Caller holds tomoyo_read_lock().
- */
-static int tomoyo_path_acl(const struct tomoyo_request_info *r,
- const struct tomoyo_path_info *filename,
- const u32 perm)
+static bool tomoyo_check_path_acl(const struct tomoyo_request_info *r,
+ const struct tomoyo_acl_info *ptr)
{
- struct tomoyo_domain_info *domain = r->domain;
- struct tomoyo_acl_info *ptr;
- int error = -EPERM;
+ const struct tomoyo_path_acl *acl = container_of(ptr, typeof(*acl),
+ head);
+ return (acl->perm & (1 << r->param.path.operation)) &&
+ tomoyo_compare_name_union(r->param.path.filename, &acl->name);
+}
- list_for_each_entry_rcu(ptr, &domain->acl_info_list, list) {
- struct tomoyo_path_acl *acl;
- if (ptr->type != TOMOYO_TYPE_PATH_ACL)
- continue;
- acl = container_of(ptr, struct tomoyo_path_acl, head);
- if (!(acl->perm & perm) ||
- !tomoyo_compare_name_union(filename, &acl->name))
- continue;
- error = 0;
- break;
- }
- return error;
+static bool tomoyo_check_path_number_acl(const struct tomoyo_request_info *r,
+ const struct tomoyo_acl_info *ptr)
+{
+ const struct tomoyo_path_number_acl *acl =
+ container_of(ptr, typeof(*acl), head);
+ return (acl->perm & (1 << r->param.path_number.operation)) &&
+ tomoyo_compare_number_union(r->param.path_number.number,
+ &acl->number) &&
+ tomoyo_compare_name_union(r->param.path_number.filename,
+ &acl->name);
+}
+
+static bool tomoyo_check_path2_acl(const struct tomoyo_request_info *r,
+ const struct tomoyo_acl_info *ptr)
+{
+ const struct tomoyo_path2_acl *acl =
+ container_of(ptr, typeof(*acl), head);
+ return (acl->perm & (1 << r->param.path2.operation)) &&
+ tomoyo_compare_name_union(r->param.path2.filename1, &acl->name1)
+ && tomoyo_compare_name_union(r->param.path2.filename2,
+ &acl->name2);
+}
+
+static bool tomoyo_check_mkdev_acl(const struct tomoyo_request_info *r,
+ const struct tomoyo_acl_info *ptr)
+{
+ const struct tomoyo_path_number3_acl *acl =
+ container_of(ptr, typeof(*acl), head);
+ return (acl->perm & (1 << r->param.mkdev.operation)) &&
+ tomoyo_compare_number_union(r->param.mkdev.mode,
+ &acl->mode) &&
+ tomoyo_compare_number_union(r->param.mkdev.major,
+ &acl->major) &&
+ tomoyo_compare_number_union(r->param.mkdev.minor,
+ &acl->minor) &&
+ tomoyo_compare_name_union(r->param.mkdev.filename,
+ &acl->name);
}
static bool tomoyo_same_path_acl(const struct tomoyo_acl_info *a,
@@ -870,88 +987,6 @@
}
/**
- * tomoyo_path_number3_acl - Check permission for path/number/number/number operation.
- *
- * @r: Pointer to "struct tomoyo_request_info".
- * @filename: Filename to check.
- * @perm: Permission.
- * @mode: Create mode.
- * @major: Device major number.
- * @minor: Device minor number.
- *
- * Returns 0 on success, -EPERM otherwise.
- *
- * Caller holds tomoyo_read_lock().
- */
-static int tomoyo_path_number3_acl(struct tomoyo_request_info *r,
- const struct tomoyo_path_info *filename,
- const u16 perm, const unsigned int mode,
- const unsigned int major,
- const unsigned int minor)
-{
- struct tomoyo_domain_info *domain = r->domain;
- struct tomoyo_acl_info *ptr;
- int error = -EPERM;
- list_for_each_entry_rcu(ptr, &domain->acl_info_list, list) {
- struct tomoyo_path_number3_acl *acl;
- if (ptr->type != TOMOYO_TYPE_PATH_NUMBER3_ACL)
- continue;
- acl = container_of(ptr, struct tomoyo_path_number3_acl, head);
- if (!tomoyo_compare_number_union(mode, &acl->mode))
- continue;
- if (!tomoyo_compare_number_union(major, &acl->major))
- continue;
- if (!tomoyo_compare_number_union(minor, &acl->minor))
- continue;
- if (!(acl->perm & perm))
- continue;
- if (!tomoyo_compare_name_union(filename, &acl->name))
- continue;
- error = 0;
- break;
- }
- return error;
-}
-
-/**
- * tomoyo_path2_acl - Check permission for double path operation.
- *
- * @r: Pointer to "struct tomoyo_request_info".
- * @type: Type of operation.
- * @filename1: First filename to check.
- * @filename2: Second filename to check.
- *
- * Returns 0 on success, -EPERM otherwise.
- *
- * Caller holds tomoyo_read_lock().
- */
-static int tomoyo_path2_acl(const struct tomoyo_request_info *r, const u8 type,
- const struct tomoyo_path_info *filename1,
- const struct tomoyo_path_info *filename2)
-{
- const struct tomoyo_domain_info *domain = r->domain;
- struct tomoyo_acl_info *ptr;
- const u8 perm = 1 << type;
- int error = -EPERM;
-
- list_for_each_entry_rcu(ptr, &domain->acl_info_list, list) {
- struct tomoyo_path2_acl *acl;
- if (ptr->type != TOMOYO_TYPE_PATH2_ACL)
- continue;
- acl = container_of(ptr, struct tomoyo_path2_acl, head);
- if (!(acl->perm & perm))
- continue;
- if (!tomoyo_compare_name_union(filename1, &acl->name1))
- continue;
- if (!tomoyo_compare_name_union(filename2, &acl->name2))
- continue;
- error = 0;
- break;
- }
- return error;
-}
-
-/**
* tomoyo_path_permission - Check permission for single path operation.
*
* @r: Pointer to "struct tomoyo_request_info".
@@ -965,7 +1000,6 @@
int tomoyo_path_permission(struct tomoyo_request_info *r, u8 operation,
const struct tomoyo_path_info *filename)
{
- const char *msg;
int error;
next:
@@ -977,17 +1011,12 @@
r->param.path.filename = filename;
r->param.path.operation = operation;
do {
- error = tomoyo_path_acl(r, filename, 1 << operation);
- if (error && operation == TOMOYO_TYPE_READ &&
+ tomoyo_check_acl(r, tomoyo_check_path_acl);
+ if (!r->granted && operation == TOMOYO_TYPE_READ &&
!r->domain->ignore_global_allow_read &&
tomoyo_is_globally_readable_file(filename))
- error = 0;
- if (!error)
- break;
- msg = tomoyo_path2keyword(operation);
- tomoyo_warn_log(r, "%s %s", msg, filename->name);
- error = tomoyo_supervisor(r, "allow_%s %s\n", msg,
- tomoyo_file_pattern(filename));
+ r->granted = true;
+ error = tomoyo_audit_path_log(r);
/*
* Do not retry for execute request, for alias may have
* changed.
@@ -1007,42 +1036,6 @@
return error;
}
-/**
- * tomoyo_path_number_acl - Check permission for ioctl/chmod/chown/chgrp operation.
- *
- * @r: Pointer to "struct tomoyo_request_info".
- * @type: Operation.
- * @filename: Filename to check.
- * @number: Number.
- *
- * Returns 0 on success, -EPERM otherwise.
- *
- * Caller holds tomoyo_read_lock().
- */
-static int tomoyo_path_number_acl(struct tomoyo_request_info *r, const u8 type,
- const struct tomoyo_path_info *filename,
- const unsigned long number)
-{
- struct tomoyo_domain_info *domain = r->domain;
- struct tomoyo_acl_info *ptr;
- const u8 perm = 1 << type;
- int error = -EPERM;
- list_for_each_entry_rcu(ptr, &domain->acl_info_list, list) {
- struct tomoyo_path_number_acl *acl;
- if (ptr->type != TOMOYO_TYPE_PATH_NUMBER_ACL)
- continue;
- acl = container_of(ptr, struct tomoyo_path_number_acl,
- head);
- if (!(acl->perm & perm) ||
- !tomoyo_compare_number_union(number, &acl->number) ||
- !tomoyo_compare_name_union(filename, &acl->name))
- continue;
- error = 0;
- break;
- }
- return error;
-}
-
static bool tomoyo_same_path_number_acl(const struct tomoyo_acl_info *a,
const struct tomoyo_acl_info *b)
{
@@ -1123,42 +1116,17 @@
const struct tomoyo_path_info *filename,
const unsigned long number)
{
- char buffer[64];
int error;
- u8 radix;
- const char *msg;
if (!filename)
return 0;
- switch (type) {
- case TOMOYO_TYPE_CREATE:
- case TOMOYO_TYPE_MKDIR:
- case TOMOYO_TYPE_MKFIFO:
- case TOMOYO_TYPE_MKSOCK:
- case TOMOYO_TYPE_CHMOD:
- radix = TOMOYO_VALUE_TYPE_OCTAL;
- break;
- case TOMOYO_TYPE_IOCTL:
- radix = TOMOYO_VALUE_TYPE_HEXADECIMAL;
- break;
- default:
- radix = TOMOYO_VALUE_TYPE_DECIMAL;
- break;
- }
- tomoyo_print_ulong(buffer, sizeof(buffer), number, radix);
r->param_type = TOMOYO_TYPE_PATH_NUMBER_ACL;
r->param.path_number.operation = type;
r->param.path_number.filename = filename;
r->param.path_number.number = number;
do {
- error = tomoyo_path_number_acl(r, type, filename, number);
- if (!error)
- break;
- msg = tomoyo_path_number2keyword(type);
- tomoyo_warn_log(r, "%s %s %s", msg, filename->name, buffer);
- error = tomoyo_supervisor(r, "allow_%s %s %s\n", msg,
- tomoyo_file_pattern(filename),
- buffer);
+ tomoyo_check_acl(r, tomoyo_check_path_number_acl);
+ error = tomoyo_audit_path_number_log(r);
} while (error == TOMOYO_RETRY_REQUEST);
return error;
}
@@ -1311,47 +1279,6 @@
}
/**
- * tomoyo_path_number3_perm2 - Check permission for path/number/number/number operation.
- *
- * @r: Pointer to "struct tomoyo_request_info".
- * @operation: Type of operation.
- * @filename: Filename to check.
- * @mode: Create mode.
- * @dev: Device number.
- *
- * Returns 0 on success, negative value otherwise.
- *
- * Caller holds tomoyo_read_lock().
- */
-static int tomoyo_path_number3_perm2(struct tomoyo_request_info *r,
- const u8 operation,
- const struct tomoyo_path_info *filename,
- const unsigned int mode,
- const unsigned int dev)
-{
- int error;
- const char *msg;
- const unsigned int major = MAJOR(dev);
- const unsigned int minor = MINOR(dev);
-
- do {
- error = tomoyo_path_number3_acl(r, filename, 1 << operation,
- mode, major, minor);
- if (!error)
- break;
- msg = tomoyo_path_number32keyword(operation);
- tomoyo_warn_log(r, "%s %s 0%o %u %u", msg, filename->name,
- mode, major, minor);
- error = tomoyo_supervisor(r, "allow_%s %s 0%o %u %u\n", msg,
- tomoyo_file_pattern(filename), mode,
- major, minor);
- } while (error == TOMOYO_RETRY_REQUEST);
- if (r->mode != TOMOYO_CONFIG_ENFORCING)
- error = 0;
- return error;
-}
-
-/**
* tomoyo_path_number3_perm - Check permission for "mkblock" and "mkchar".
*
* @operation: Type of operation. (TOMOYO_TYPE_MKCHAR or TOMOYO_TYPE_MKBLOCK)
@@ -1383,8 +1310,8 @@
r.param.mkdev.mode = mode;
r.param.mkdev.major = MAJOR(dev);
r.param.mkdev.minor = MINOR(dev);
- error = tomoyo_path_number3_perm2(&r, operation, &buf, mode,
- dev);
+ tomoyo_check_acl(&r, tomoyo_check_mkdev_acl);
+ error = tomoyo_audit_mkdev_log(&r);
kfree(buf.name);
}
tomoyo_read_unlock(idx);
@@ -1406,7 +1333,6 @@
struct path *path2)
{
int error = -ENOMEM;
- const char *msg;
struct tomoyo_path_info buf1;
struct tomoyo_path_info buf2;
struct tomoyo_request_info r;
@@ -1440,15 +1366,9 @@
r.param.path2.filename1 = &buf1;
r.param.path2.filename2 = &buf2;
do {
- error = tomoyo_path2_acl(&r, operation, &buf1, &buf2);
- if (!error)
- break;
- msg = tomoyo_path22keyword(operation);
- tomoyo_warn_log(&r, "%s %s %s", msg, buf1.name, buf2.name);
- error = tomoyo_supervisor(&r, "allow_%s %s %s\n", msg,
- tomoyo_file_pattern(&buf1),
- tomoyo_file_pattern(&buf2));
- } while (error == TOMOYO_RETRY_REQUEST);
+ tomoyo_check_acl(&r, tomoyo_check_path2_acl);
+ error = tomoyo_audit_path2_log(&r);
+ } while (error == TOMOYO_RETRY_REQUEST);
out:
kfree(buf1.name);
kfree(buf2.name);