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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>
This commit is contained in:
Christoph Hellwig
2017-05-10 15:06:33 +02:00
parent 787d8c530a
commit 85787090a2
14 changed files with 23 additions and 36 deletions
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5
fs/overlayfs/copy_up.c
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@@ -284,7 +284,6 @@ static int ovl_set_origin(struct dentry *dentry, struct dentry *lower,
struct dentry *upper)
{
struct super_block *sb = lower->d_sb;
uuid_be *uuid = (uuid_be *) &sb->s_uuid;
const struct ovl_fh *fh = NULL;
int err;
@@ -294,8 +293,8 @@ static int ovl_set_origin(struct dentry *dentry, struct dentry *lower,
* up and a pure upper inode.
*/
if (sb->s_export_op && sb->s_export_op->fh_to_dentry &&
uuid_be_cmp(*uuid, NULL_UUID_BE)) {
fh = ovl_encode_fh(lower, uuid);
!uuid_is_null(&sb->s_uuid)) {
fh = ovl_encode_fh(lower, &sb->s_uuid);
if (IS_ERR(fh))
return PTR_ERR(fh);
}