From 85787090a21eb749d8b347eaf9ff1a455637473c Mon Sep 17 00:00:00 2001
From: Christoph Hellwig <hch@lst.de>
Date: Wed, 10 May 2017 15:06:33 +0200
Subject: fs: switch ->s_uuid to uuid_t
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For some file systems we still memcpy into it, but in various places this
already allows us to use the proper uuid helpers.  More to come..

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Amir Goldstein <amir73il@gmail.com>
Acked-by: Mimi Zohar <zohar@linux.vnet.ibm.com> (Changes to IMA/EVM)
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
 mm/cleancache.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'mm')

diff --git a/mm/cleancache.c b/mm/cleancache.c
index ba5d8f3e6d68..f7b9fdc79d97 100644
--- a/mm/cleancache.c
+++ b/mm/cleancache.c
@@ -130,7 +130,7 @@ void __cleancache_init_shared_fs(struct super_block *sb)
 	int pool_id = CLEANCACHE_NO_BACKEND_SHARED;
 
 	if (cleancache_ops) {
-		pool_id = cleancache_ops->init_shared_fs(sb->s_uuid, PAGE_SIZE);
+		pool_id = cleancache_ops->init_shared_fs(&sb->s_uuid, PAGE_SIZE);
 		if (pool_id < 0)
 			pool_id = CLEANCACHE_NO_POOL;
 	}
-- 
cgit v1.2.3


From 2b4db79618ade14a9566455cbbea339f74674789 Mon Sep 17 00:00:00 2001
From: Amir Goldstein <amir73il@gmail.com>
Date: Thu, 18 May 2017 15:29:33 +0300
Subject: tmpfs: generate random sb->s_uuid

This is used by overlayfs to encode intrasystem unique file handles.

Suggested-by: Miklos Szeredi <mszeredi@redhat.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 mm/shmem.c | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'mm')

diff --git a/mm/shmem.c b/mm/shmem.c
index e67d6ba4e98e..391f2dcca727 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -75,6 +75,7 @@ static struct vfsmount *shm_mnt;
 #include <uapi/linux/memfd.h>
 #include <linux/userfaultfd_k.h>
 #include <linux/rmap.h>
+#include <linux/uuid.h>
 
 #include <linux/uaccess.h>
 #include <asm/pgtable.h>
@@ -3761,6 +3762,7 @@ int shmem_fill_super(struct super_block *sb, void *data, int silent)
 #ifdef CONFIG_TMPFS_POSIX_ACL
 	sb->s_flags |= MS_POSIXACL;
 #endif
+	uuid_gen(&sb->s_uuid);
 
 	inode = shmem_get_inode(sb, NULL, S_IFDIR | sbinfo->mode, 0, VM_NORESERVE);
 	if (!inode)
-- 
cgit v1.2.3