diff options
Diffstat (limited to 'fs/overlayfs')
| -rw-r--r-- | fs/overlayfs/file.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/fs/overlayfs/file.c b/fs/overlayfs/file.c index 4c8bf77e048f..58b37fec133d 100644 --- a/fs/overlayfs/file.c +++ b/fs/overlayfs/file.c @@ -286,6 +286,29 @@ static int ovl_mmap(struct file *file, struct vm_area_struct *vma) return ret; } +static long ovl_fallocate(struct file *file, int mode, loff_t offset, loff_t len) +{ + struct inode *inode = file_inode(file); + struct fd real; + const struct cred *old_cred; + int ret; + + ret = ovl_real_fdget(file, &real); + if (ret) + return ret; + + old_cred = ovl_override_creds(file_inode(file)->i_sb); + ret = vfs_fallocate(real.file, mode, offset, len); + revert_creds(old_cred); + + /* Update size */ + ovl_copyattr(ovl_inode_real(inode), inode); + + fdput(real); + + return ret; +} + const struct file_operations ovl_file_operations = { .open = ovl_open, .release = ovl_release, @@ -294,4 +317,5 @@ const struct file_operations ovl_file_operations = { .write_iter = ovl_write_iter, .fsync = ovl_fsync, .mmap = ovl_mmap, + .fallocate = ovl_fallocate, }; |