diff options
Diffstat (limited to 'fs/overlayfs/file.c')
| -rw-r--r-- | fs/overlayfs/file.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/fs/overlayfs/file.c b/fs/overlayfs/file.c index c144183a7e09..4d53d3b7e5fe 100644 --- a/fs/overlayfs/file.c +++ b/fs/overlayfs/file.c @@ -571,6 +571,26 @@ static loff_t ovl_remap_file_range(struct file *file_in, loff_t pos_in, remap_flags, op); } +static int ovl_flush(struct file *file, fl_owner_t id) +{ + struct fd real; + const struct cred *old_cred; + int err; + + err = ovl_real_fdget(file, &real); + if (err) + return err; + + if (real.file->f_op->flush) { + old_cred = ovl_override_creds(file_inode(file)->i_sb); + err = real.file->f_op->flush(real.file, id); + revert_creds(old_cred); + } + fdput(real); + + return err; +} + const struct file_operations ovl_file_operations = { .open = ovl_open, .release = ovl_release, @@ -581,6 +601,7 @@ const struct file_operations ovl_file_operations = { .mmap = ovl_mmap, .fallocate = ovl_fallocate, .fadvise = ovl_fadvise, + .flush = ovl_flush, .splice_read = generic_file_splice_read, .splice_write = iter_file_splice_write, |