TOMOYO: Cleanup part 1.

In order to synchronize with TOMOYO 1.8's syntax,

(1) Remove special handling for allow_read/write permission.
(2) Replace deny_rewrite/allow_rewrite permission with allow_append permission.
(3) Remove file_pattern keyword.
(4) Remove allow_read permission from exception policy.
(5) Allow creating domains in enforcing mode without calling supervisor.
(6) Add permission check for opening directory for reading.
(7) Add permission check for stat() operation.
(8) Make "cat < /sys/kernel/security/tomoyo/self_domain" behave as if
    "cat /sys/kernel/security/tomoyo/self_domain".

Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: James Morris <jmorris@namei.org>

1 files changed, 10 insertions, 83 deletions

diff --git a/security/tomoyo/common.h b/security/tomoyo/common.h
index 7c66bd898782..a5d6e212b18f 100644
--- a/security/tomoyo/common.h
+++ b/security/tomoyo/common.h
@@ -52,9 +52,6 @@ enum tomoyo_policy_id {
         TOMOYO_ID_NUMBER_GROUP,
         TOMOYO_ID_TRANSITION_CONTROL,
         TOMOYO_ID_AGGREGATOR,
-        TOMOYO_ID_GLOBALLY_READABLE,
-        TOMOYO_ID_PATTERN,
-        TOMOYO_ID_NO_REWRITE,
         TOMOYO_ID_MANAGER,
         TOMOYO_ID_NAME,
         TOMOYO_ID_ACL,
@@ -73,8 +70,6 @@ enum tomoyo_group_id {
 #define TOMOYO_KEYWORD_ALLOW_MOUNT               "allow_mount "
 #define TOMOYO_KEYWORD_ALLOW_READ                "allow_read "
 #define TOMOYO_KEYWORD_DELETE                    "delete "
-#define TOMOYO_KEYWORD_DENY_REWRITE              "deny_rewrite "
-#define TOMOYO_KEYWORD_FILE_PATTERN              "file_pattern "
 #define TOMOYO_KEYWORD_INITIALIZE_DOMAIN         "initialize_domain "
 #define TOMOYO_KEYWORD_KEEP_DOMAIN               "keep_domain "
 #define TOMOYO_KEYWORD_NO_INITIALIZE_DOMAIN      "no_initialize_domain "
@@ -83,7 +78,6 @@ enum tomoyo_group_id {
 #define TOMOYO_KEYWORD_NUMBER_GROUP              "number_group "
 #define TOMOYO_KEYWORD_SELECT                    "select "
 #define TOMOYO_KEYWORD_USE_PROFILE               "use_profile "
-#define TOMOYO_KEYWORD_IGNORE_GLOBAL_ALLOW_READ  "ignore_global_allow_read"
 #define TOMOYO_KEYWORD_QUOTA_EXCEEDED            "quota_exceeded"
 #define TOMOYO_KEYWORD_TRANSITION_FAILED         "transition_failed"
 /* A domain definition starts with <kernel>. */
@@ -115,35 +109,21 @@ enum tomoyo_acl_entry_type_index {
 };
 
 /* Index numbers for File Controls. */
-
-/*
- * TOMOYO_TYPE_READ_WRITE is special. TOMOYO_TYPE_READ_WRITE is automatically
- * set if both TOMOYO_TYPE_READ and TOMOYO_TYPE_WRITE are set.
- * Both TOMOYO_TYPE_READ and TOMOYO_TYPE_WRITE are automatically set if
- * TOMOYO_TYPE_READ_WRITE is set.
- * TOMOYO_TYPE_READ_WRITE is automatically cleared if either TOMOYO_TYPE_READ
- * or TOMOYO_TYPE_WRITE is cleared.
- * Both TOMOYO_TYPE_READ and TOMOYO_TYPE_WRITE are automatically cleared if
- * TOMOYO_TYPE_READ_WRITE is cleared.
- */
-
 enum tomoyo_path_acl_index {
-        TOMOYO_TYPE_READ_WRITE,
         TOMOYO_TYPE_EXECUTE,
         TOMOYO_TYPE_READ,
         TOMOYO_TYPE_WRITE,
+        TOMOYO_TYPE_APPEND,
         TOMOYO_TYPE_UNLINK,
+        TOMOYO_TYPE_GETATTR,
         TOMOYO_TYPE_RMDIR,
         TOMOYO_TYPE_TRUNCATE,
         TOMOYO_TYPE_SYMLINK,
-        TOMOYO_TYPE_REWRITE,
         TOMOYO_TYPE_CHROOT,
         TOMOYO_TYPE_UMOUNT,
         TOMOYO_MAX_PATH_OPERATION
 };
 
-#define TOMOYO_RW_MASK ((1 << TOMOYO_TYPE_READ) | (1 << TOMOYO_TYPE_WRITE))
-
 enum tomoyo_mkdev_acl_index {
         TOMOYO_TYPE_MKBLOCK,
         TOMOYO_TYPE_MKCHAR,
@@ -187,13 +167,13 @@ enum tomoyo_mac_index {
         TOMOYO_MAC_FILE_OPEN,
         TOMOYO_MAC_FILE_CREATE,
         TOMOYO_MAC_FILE_UNLINK,
+        TOMOYO_MAC_FILE_GETATTR,
         TOMOYO_MAC_FILE_MKDIR,
         TOMOYO_MAC_FILE_RMDIR,
         TOMOYO_MAC_FILE_MKFIFO,
         TOMOYO_MAC_FILE_MKSOCK,
         TOMOYO_MAC_FILE_TRUNCATE,
         TOMOYO_MAC_FILE_SYMLINK,
-        TOMOYO_MAC_FILE_REWRITE,
         TOMOYO_MAC_FILE_MKBLOCK,
         TOMOYO_MAC_FILE_MKCHAR,
         TOMOYO_MAC_FILE_LINK,
@@ -388,9 +368,7 @@ struct tomoyo_acl_info {
  *      "deleted", false otherwise.
  *  (6) "quota_warned" is a bool which is used for suppressing warning message
  *      when learning mode learned too much entries.
- *  (7) "ignore_global_allow_read" is a bool which is true if this domain
- *      should ignore "allow_read" directive in exception policy.
- *  (8) "transition_failed" is a bool which is set to true when this domain was
+ *  (7) "transition_failed" is a bool which is set to true when this domain was
  *      unable to create a new domain at tomoyo_find_next_domain() because the
  *      name of the domain to be created was too long or it could not allocate
  *      memory. If set to true, more than one process continued execve()
@@ -415,7 +393,6 @@ struct tomoyo_domain_info {
         u8 profile;        /* Profile number to use. */
         bool is_deleted;   /* Delete flag.           */
         bool quota_warned; /* Quota warnning flag.   */
-        bool ignore_global_allow_read; /* Ignore "allow_read" flag. */
         bool transition_failed; /* Domain transition failed flag. */
         atomic_t users; /* Number of referring credentials. */
 };
@@ -429,10 +406,9 @@ struct tomoyo_domain_info {
  *  (2) "perm" which is a bitmask of permitted operations.
  *  (3) "name" is the pathname.
  *
- * Directives held by this structure are "allow_read/write", "allow_execute",
- * "allow_read", "allow_write", "allow_unlink", "allow_rmdir",
- * "allow_truncate", "allow_symlink", "allow_rewrite", "allow_chroot" and
- * "allow_unmount".
+ * Directives held by this structure are "allow_execute", "allow_read",
+ * "allow_write", "allow_append", "allow_unlink", "allow_rmdir",
+ * "allow_truncate", "allow_symlink", "allow_chroot" and "allow_unmount".
  */
 struct tomoyo_path_acl {
         struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_PATH_ACL */
@@ -574,47 +550,6 @@ struct tomoyo_io_buffer {
 };
 
 /*
- * tomoyo_readable_file is a structure which is used for holding
- * "allow_read" entries.
- * It has following fields.
- *
- *  (1) "head" is "struct tomoyo_acl_head".
- *  (2) "filename" is a pathname which is allowed to open(O_RDONLY).
- */
-struct tomoyo_readable_file {
-        struct tomoyo_acl_head head;
-        const struct tomoyo_path_info *filename;
-};
-
-/*
- * tomoyo_no_pattern is a structure which is used for holding
- * "file_pattern" entries.
- * It has following fields.
- *
- *  (1) "head" is "struct tomoyo_acl_head".
- *  (2) "pattern" is a pathname pattern which is used for converting pathnames
- *      to pathname patterns during learning mode.
- */
-struct tomoyo_no_pattern {
-        struct tomoyo_acl_head head;
-        const struct tomoyo_path_info *pattern;
-};
-
-/*
- * tomoyo_no_rewrite is a structure which is used for holding
- * "deny_rewrite" entries.
- * It has following fields.
- *
- *  (1) "head" is "struct tomoyo_acl_head".
- *  (2) "pattern" is a pathname which is by default not permitted to modify
- *      already existing content.
- */
-struct tomoyo_no_rewrite {
-        struct tomoyo_acl_head head;
-        const struct tomoyo_path_info *pattern;
-};
-
-/*
  * tomoyo_transition_control is a structure which is used for holding
  * "initialize_domain"/"no_initialize_domain"/"keep_domain"/"no_keep_domain"
  * entries.
@@ -764,23 +699,17 @@ int tomoyo_write_aggregator(char *data, const bool is_delete);
 int tomoyo_write_transition_control(char *data, const bool is_delete,
                                     const u8 type);
 /*
- * Create "allow_read/write", "allow_execute", "allow_read", "allow_write",
+ * Create "allow_execute", "allow_read", "allow_write", "allow_append",
  * "allow_create", "allow_unlink", "allow_mkdir", "allow_rmdir",
  * "allow_mkfifo", "allow_mksock", "allow_mkblock", "allow_mkchar",
- * "allow_truncate", "allow_symlink", "allow_rewrite", "allow_rename" and
- * "allow_link" entry in domain policy.
+ * "allow_truncate", "allow_symlink", "allow_rename" and "allow_link" entry
+ * in domain policy.
  */
 int tomoyo_write_file(char *data, struct tomoyo_domain_info *domain,
                       const bool is_delete);
-/* Create "allow_read" entry in exception policy. */
-int tomoyo_write_globally_readable(char *data, const bool is_delete);
 /* Create "allow_mount" entry in domain policy. */
 int tomoyo_write_mount(char *data, struct tomoyo_domain_info *domain,
                        const bool is_delete);
-/* Create "deny_rewrite" entry in exception policy. */
-int tomoyo_write_no_rewrite(char *data, const bool is_delete);
-/* Create "file_pattern" entry in exception policy. */
-int tomoyo_write_pattern(char *data, const bool is_delete);
 /* Create "path_group"/"number_group" entry in exception policy. */
 int tomoyo_write_group(char *data, const bool is_delete, const u8 type);
 int tomoyo_supervisor(struct tomoyo_request_info *r, const char *fmt, ...)
@@ -819,8 +748,6 @@ char *tomoyo_realpath_nofollow(const char *pathname);
  * ignores chroot'ed root and the pathname is already solved.
  */
 char *tomoyo_realpath_from_path(struct path *path);
-/* Get patterned pathname. */
-const char *tomoyo_pattern(const struct tomoyo_path_info *filename);
 
 /* Check memory quota. */
 bool tomoyo_memory_ok(void *ptr);