xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

ovl: check if upperdir fs supports O_TMPFILE

Browse Source 
This is needed for choosing between concurrent copyup
using O_TMPFILE and legacy copyup using workdir+rename.

Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
This commit is contained in:
Amir Goldstein
2017-01-17 06:34:53 +02:00
committed by Miklos Szeredi
parent bfe219d373
commit e7f52429b4
3 changed files with 20 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
fs/overlayfs/super.c
View File

@@ -825,6 +825,8 @@ static int ovl_fill_super(struct super_block *sb, void *data, int silent)
* creation of workdir in previous step.
*/
if (ufs->workdir) {
struct dentry *temp;
err = ovl_check_d_type_supported(&workpath);
if (err < 0)
goto out_put_workdir;
@@ -836,6 +838,14 @@ static int ovl_fill_super(struct super_block *sb, void *data, int silent)
*/
if (!err)
pr_warn("overlayfs: upper fs needs to support d_type.\n");
/* Check if upper/work fs supports O_TMPFILE */
temp = ovl_do_tmpfile(ufs->workdir, S_IFREG | 0);
ufs->tmpfile = !IS_ERR(temp);
if (ufs->tmpfile)
dput(temp);
else
pr_warn("overlayfs: upper fs does not support tmpfile.\n");
}
}