[PATCH 23/24] tmpfs: generate random sb->s_uuid
From: Christoph Hellwig <hidden>
Date: 2017-05-31 16:18:25
Also in:
linux-block, linux-fsdevel, linux-xfs, lkml, nvdimm
Subsystem:
memory management, the rest, tmpfs (shmem filesystem) · Maintainers:
Andrew Morton, Linus Torvalds, Hugh Dickins
From: Amir Goldstein <redacted> This is used by overlayfs to encode intrasystem unique file handles. Suggested-by: Miklos Szeredi <redacted> Cc: Hugh Dickins <redacted> Cc: Andrew Morton <akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org> Signed-off-by: Amir Goldstein <redacted> Signed-off-by: Christoph Hellwig <redacted> --- mm/shmem.c | 2 ++ 1 file changed, 2 insertions(+)
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)
--
2.11.0