vfs: Add some logging to the core users of the fs_context log

Add some logging to the core users of the fs_context log so that information can be extracted from them as to the reason for failure. Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
mariux64 · Feb 28, 2019 · 06a2ae5 · 06a2ae5
1 parent e7582e1
commit 06a2ae5
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Showing 2 changed files with 4 additions and 2 deletions.
diff --git a/fs/super.c b/fs/super.c
@@ -1467,8 +1467,10 @@ int vfs_get_tree(struct fs_context *fc)
 	struct super_block *sb;
 	int error;
 
-	if (fc->fs_type->fs_flags & FS_REQUIRES_DEV && !fc->source)
+	if (fc->fs_type->fs_flags & FS_REQUIRES_DEV && !fc->source) {
+		errorf(fc, "Filesystem requires source device");
 		return -ENOENT;
+	}
 
 	if (fc->root)
 		return -EBUSY;

diff --git a/kernel/cgroup/cgroup-v1.c b/kernel/cgroup/cgroup-v1.c
@@ -17,7 +17,7 @@
 
 #include <trace/events/cgroup.h>
 
-#define cg_invalf(fc, fmt, ...) ({ pr_err(fmt, ## __VA_ARGS__); -EINVAL; })
+#define cg_invalf(fc, fmt, ...) invalf(fc, fmt, ## __VA_ARGS__)
 
 /*
  * pidlists linger the following amount before being destroyed.  The goal