From: Christoph Hellwig <hch@lst.de>
To: Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
Amir Goldstein <amir73il@gmail.com>,
linux-fsdevel@vger.kernel.org
Cc: Shaohua Li <shli@kernel.org>,
Dan Williams <dan.j.williams@intel.com>,
David Howells <dhowells@redhat.com>,
Steven Whitehouse <swhiteho@redhat.com>,
Mimi Zohar <zohar@linux.vnet.ibm.com>,
linux-xfs@vger.kernel.org, linux-raid@vger.kernel.org,
linux-nvdimm@lists.01.org, linux-kernel@vger.kernel.org,
linux-block@vger.kernel.org, Hugh Dickins <hughd@google.com>,
Andrew Morton <akpm@linux-foundation.org>
Subject: [PATCH 23/24] tmpfs: generate random sb->s_uuid
Date: Wed, 31 May 2017 18:18:25 +0200 [thread overview]
Message-ID: <20170531161826.23243-24-hch@lst.de> (raw)
In-Reply-To: <20170531161826.23243-1-hch@lst.de>
From: Amir Goldstein <amir73il@gmail.com>
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(+)
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
next prev parent reply other threads:[~2017-05-31 16:18 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-05-31 16:18 cleanup UUID types V6 Christoph Hellwig
2017-05-31 16:18 ` [PATCH 01/24] uuid,afs: move struct uuid_v1 back into afs Christoph Hellwig
2017-05-31 16:18 ` [PATCH 02/24] xfs: use uuid_copy() helper to abstract uuid_t Christoph Hellwig
2017-05-31 16:18 ` [PATCH 03/24] xfs: use uuid_be to implement the uuid_t type Christoph Hellwig
2017-05-31 16:18 ` [PATCH 04/24] md: namespace private helper names Christoph Hellwig
2017-05-31 16:18 ` [PATCH 05/24] uuid: remove uuid_be defintions from the uapi header Christoph Hellwig
2017-05-31 16:18 ` [PATCH 06/24] uuid: rename uuid types Christoph Hellwig
2017-05-31 16:18 ` [PATCH 07/24] nfsd: namespace-prefix uuid_parse Christoph Hellwig
2017-05-31 16:18 ` [PATCH 08/24] uuid: rename uuid_to_bin to uuid_parse Christoph Hellwig
2017-05-31 18:14 ` Andy Shevchenko
2017-05-31 19:40 ` Christoph Hellwig
2017-05-31 16:18 ` [PATCH 09/24] uuid: don't export guid_index and uuid_index Christoph Hellwig
2017-05-31 16:18 ` [PATCH 10/24] uuid: hoist helpers uuid_equal() and uuid_copy() from xfs Christoph Hellwig
2017-05-31 16:18 ` [PATCH 11/24] uuid: hoist uuid_is_null() helper from libnvdimm Christoph Hellwig
2017-05-31 16:18 ` [PATCH 12/24] S390/sysinfo: use uuid_is_null instead of opencoding it Christoph Hellwig
2017-05-31 16:18 ` [PATCH 13/24] xfs: remove uuid_getnodeuniq and xfs_uu_t Christoph Hellwig
2017-05-31 16:18 ` [PATCH 14/24] xfs: use the common helper uuid_is_null() Christoph Hellwig
2017-05-31 16:18 ` [PATCH 15/24] block: remove blk_part_pack_uuid Christoph Hellwig
2017-05-31 18:16 ` Andy Shevchenko
2017-05-31 19:39 ` Christoph Hellwig
2017-05-31 16:18 ` [PATCH 16/24] ima/policy: switch to use uuid_t Christoph Hellwig
2017-05-31 16:18 ` [PATCH 17/24] fs: switch ->s_uuid to uuid_t Christoph Hellwig
2017-05-31 16:18 ` [PATCH 18/24] overlayfs: use uuid_t instead of uuid_be Christoph Hellwig
2017-05-31 16:18 ` [PATCH 19/24] partitions/ldm: switch to use uuid_t Christoph Hellwig
2017-05-31 16:18 ` [PATCH 20/24] sysctl: " Christoph Hellwig
2017-05-31 16:18 ` [PATCH 21/24] nvme: switch to uuid_t Christoph Hellwig
2017-05-31 16:18 ` [PATCH 22/24] scsi_debug: " Christoph Hellwig
2017-05-31 16:18 ` Christoph Hellwig [this message]
2017-05-31 16:18 ` [PATCH 24/24] MAINTAINERS: add uuid entry Christoph Hellwig
2017-05-31 18:25 ` [PATCH 01/24] uuid,afs: move struct uuid_v1 back into afs David Howells
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