Cachefiles: Fix up scripted S_ISDIR/S_ISREG/S_ISLNK conversions

Fix up the following scripted S_ISDIR/S_ISREG/S_ISLNK conversions (or lack
thereof) in cachefiles:

 (1) Cachefiles mostly wants to use d_can_lookup() rather than d_is_dir() as
     it doesn't want to deal with automounts in its cache.

 (2) Coccinelle didn't find S_IS* expressions in ASSERT() statements in
     cachefiles.
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

fs/cachefiles/daemon.c

@@ -574,7 +574,7 @@ static int cachefiles_daemon_cull(struct cachefiles_cache *cache, char *args)
 	/* extract the directory dentry from the cwd */
 	get_fs_pwd(current->fs, &path);
 
-	if (!d_is_dir(path.dentry))
+	if (!d_can_lookup(path.dentry))
 		goto notdir;
 
 	cachefiles_begin_secure(cache, &saved_cred);
@@ -646,7 +646,7 @@ static int cachefiles_daemon_inuse(struct cachefiles_cache *cache, char *args)
 	/* extract the directory dentry from the cwd */
 	get_fs_pwd(current->fs, &path);
 
-	if (!d_is_dir(path.dentry))
+	if (!d_can_lookup(path.dentry))
 		goto notdir;
 
 	cachefiles_begin_secure(cache, &saved_cred);

fs/cachefiles/interface.c

@@ -437,7 +437,7 @@ static int cachefiles_attr_changed(struct fscache_object *_object)
 	if (!object->backer)
 		return -ENOBUFS;
 
-	ASSERT(S_ISREG(object->backer->d_inode->i_mode));
+	ASSERT(d_is_reg(object->backer));
 
 	fscache_set_store_limit(&object->fscache, ni_size);
 
@@ -501,7 +501,7 @@ static void cachefiles_invalidate_object(struct fscache_operation *op)
 	       op->object->debug_id, (unsigned long long)ni_size);
 
 	if (object->backer) {
-		ASSERT(S_ISREG(object->backer->d_inode->i_mode));
+		ASSERT(d_is_reg(object->backer));
 
 		fscache_set_store_limit(&object->fscache, ni_size);
 

fs/cachefiles/namei.c

@@ -323,7 +323,7 @@ static int cachefiles_bury_object(struct cachefiles_cache *cache,
 		return 0;
 	}
 
-	if (!d_is_dir(cache->graveyard)) {
+	if (!d_can_lookup(cache->graveyard)) {
 		unlock_rename(cache->graveyard, dir);
 		cachefiles_io_error(cache, "Graveyard no longer a directory");
 		return -EIO;
@@ -539,7 +539,7 @@ int cachefiles_walk_to_object(struct cachefiles_object *parent,
 			_debug("mkdir -> %p{%p{ino=%lu}}",
 			       next, next->d_inode, next->d_inode->i_ino);
 
-		} else if (!d_is_dir(next)) {
+		} else if (!d_can_lookup(next)) {
 			pr_err("inode %lu is not a directory\n",
 			       next->d_inode->i_ino);
 			ret = -ENOBUFS;
@@ -568,7 +568,7 @@ int cachefiles_walk_to_object(struct cachefiles_object *parent,
 			_debug("create -> %p{%p{ino=%lu}}",
 			       next, next->d_inode, next->d_inode->i_ino);
 
-		} else if (!d_is_dir(next) &&
+		} else if (!d_can_lookup(next) &&
 			   !d_is_reg(next)
 			   ) {
 			pr_err("inode %lu is not a file or directory\n",
@@ -763,7 +763,7 @@ struct dentry *cachefiles_get_directory(struct cachefiles_cache *cache,
 	/* we need to make sure the subdir is a directory */
 	ASSERT(subdir->d_inode);
 
-	if (!d_is_dir(subdir)) {
+	if (!d_can_lookup(subdir)) {
 		pr_err("%s is not a directory\n", dirname);
 		ret = -EIO;
 		goto check_error;

fs/cachefiles/rdwr.c

@@ -900,7 +900,7 @@ int cachefiles_write_page(struct fscache_storage *op, struct page *page)
 		return -ENOBUFS;
 	}
 
-	ASSERT(S_ISREG(object->backer->d_inode->i_mode));
+	ASSERT(d_is_reg(object->backer));
 
 	cache = container_of(object->fscache.cache,
 			     struct cachefiles_cache, cache);