audit: use macros for unset inode and device values

Clean up a number of places were casted magic numbers are used to represent
unset inode and device numbers in preparation for the audit by executable path
patch set.

Signed-off-by: Richard Guy Briggs <rgb@redhat.com>
[PM: enclosed the _UNSET macros in parentheses for ./scripts/checkpatch]
Signed-off-by: Paul Moore <pmoore@redhat.com>

4 files changed, 11 insertions, 8 deletions

diff --git a/include/linux/audit.h b/include/linux/audit.h
index c2e7e3a83965..759feb0e9d13 100644
--- a/include/linux/audit.h
+++ b/include/linux/audit.h
@@ -27,6 +27,9 @@
 #include <linux/ptrace.h>
 #include <uapi/linux/audit.h>
 
+#define AUDIT_INO_UNSET ((unsigned long)-1)
+#define AUDIT_DEV_UNSET ((dev_t)-1)
+
 struct audit_sig_info {
         uid_t           uid;
         pid_t           pid;
diff --git a/kernel/audit.c b/kernel/audit.c
index 7497a5a0fac0..060153dc47d4 100644
--- a/kernel/audit.c
+++ b/kernel/audit.c
@@ -1759,7 +1759,7 @@ void audit_log_name(struct audit_context *context, struct audit_names *n,
         } else
                 audit_log_format(ab, " name=(null)");
 
-        if (n->ino != (unsigned long)-1) {
+        if (n->ino != AUDIT_INO_UNSET) {
                 audit_log_format(ab, " inode=%lu"
                                  " dev=%02x:%02x mode=%#ho"
                                  " ouid=%u ogid=%u rdev=%02x:%02x",
diff --git a/kernel/audit_watch.c b/kernel/audit_watch.c
index b81ad5bc7485..645c6884cee5 100644
--- a/kernel/audit_watch.c
+++ b/kernel/audit_watch.c
@@ -138,7 +138,7 @@ char *audit_watch_path(struct audit_watch *watch)
 
 int audit_watch_compare(struct audit_watch *watch, unsigned long ino, dev_t dev)
 {
-        return (watch->ino != (unsigned long)-1) &&
+        return (watch->ino != AUDIT_INO_UNSET) &&
                 (watch->ino == ino) &&
                 (watch->dev == dev);
 }
@@ -179,8 +179,8 @@ static struct audit_watch *audit_init_watch(char *path)
         INIT_LIST_HEAD(&watch->rules);
         atomic_set(&watch->count, 1);
         watch->path = path;
-        watch->dev = (dev_t)-1;
-        watch->ino = (unsigned long)-1;
+        watch->dev = AUDIT_DEV_UNSET;
+        watch->ino = AUDIT_INO_UNSET;
 
         return watch;
 }
@@ -493,7 +493,7 @@ static int audit_watch_handle_event(struct fsnotify_group *group,
         if (mask & (FS_CREATE|FS_MOVED_TO) && inode)
                 audit_update_watch(parent, dname, inode->i_sb->s_dev, inode->i_ino, 0);
         else if (mask & (FS_DELETE|FS_MOVED_FROM))
-                audit_update_watch(parent, dname, (dev_t)-1, (unsigned long)-1, 1);
+                audit_update_watch(parent, dname, AUDIT_DEV_UNSET, AUDIT_INO_UNSET, 1);
         else if (mask & (FS_DELETE_SELF|FS_UNMOUNT|FS_MOVE_SELF))
                 audit_remove_parent_watches(parent);
 
diff --git a/kernel/auditsc.c b/kernel/auditsc.c
index f6bc31e7dca9..ea3fe2b748a8 100644
--- a/kernel/auditsc.c
+++ b/kernel/auditsc.c
@@ -180,7 +180,7 @@ static int audit_match_filetype(struct audit_context *ctx, int val)
                 return 0;
 
         list_for_each_entry(n, &ctx->names_list, list) {
-                if ((n->ino != -1) &&
+                if ((n->ino != AUDIT_INO_UNSET) &&
                     ((n->mode & S_IFMT) == mode))
                         return 1;
         }
@@ -1681,7 +1681,7 @@ static struct audit_names *audit_alloc_name(struct audit_context *context,
                 aname->should_free = true;
         }
 
-        aname->ino = (unsigned long)-1;
+        aname->ino = AUDIT_INO_UNSET;
         aname->type = type;
         list_add_tail(&aname->list, &context->names_list);
 
@@ -1923,7 +1923,7 @@ void __audit_inode_child(const struct inode *parent,
         if (inode)
                 audit_copy_inode(found_child, dentry, inode);
         else
-                found_child->ino = (unsigned long)-1;
+                found_child->ino = AUDIT_INO_UNSET;
 }
 EXPORT_SYMBOL_GPL(__audit_inode_child);