ocfs2: implement i_op->permission
Implement .permission() in ocfs2_file_iops, ocfs2_special_file_iops and
ocfs2_dir_iops.
This helps us avoid some multi-node races with mode change and vfs
operations.
Signed-off-by: Tiger Yang <tiger.yang@oracle.com>
Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c
index b64ef7c6..8786b3c 100644
--- a/fs/ocfs2/file.c
+++ b/fs/ocfs2/file.c
@@ -945,6 +945,28 @@
return err;
}
+int ocfs2_permission(struct inode *inode, int mask, struct nameidata *nd)
+{
+ int ret;
+
+ mlog_entry_void();
+
+ ret = ocfs2_meta_lock(inode, NULL, 0);
+ if (ret) {
+ mlog_errno(ret);
+ goto out;
+ }
+
+ ret = generic_permission(inode, mask, NULL);
+ if (ret)
+ mlog_errno(ret);
+
+ ocfs2_meta_unlock(inode, 0);
+out:
+ mlog_exit(ret);
+ return ret;
+}
+
static int ocfs2_write_remove_suid(struct inode *inode)
{
int ret;
@@ -1329,11 +1351,13 @@
struct inode_operations ocfs2_file_iops = {
.setattr = ocfs2_setattr,
.getattr = ocfs2_getattr,
+ .permission = ocfs2_permission,
};
struct inode_operations ocfs2_special_file_iops = {
.setattr = ocfs2_setattr,
.getattr = ocfs2_getattr,
+ .permission = ocfs2_permission,
};
const struct file_operations ocfs2_fops = {
diff --git a/fs/ocfs2/file.h b/fs/ocfs2/file.h
index 475ed8a..601a453 100644
--- a/fs/ocfs2/file.h
+++ b/fs/ocfs2/file.h
@@ -48,6 +48,8 @@
int ocfs2_setattr(struct dentry *dentry, struct iattr *attr);
int ocfs2_getattr(struct vfsmount *mnt, struct dentry *dentry,
struct kstat *stat);
+int ocfs2_permission(struct inode *inode, int mask,
+ struct nameidata *nd);
int ocfs2_set_inode_size(handle_t *handle,
struct inode *inode,
diff --git a/fs/ocfs2/namei.c b/fs/ocfs2/namei.c
index 583bffe..21db45d 100644
--- a/fs/ocfs2/namei.c
+++ b/fs/ocfs2/namei.c
@@ -2311,4 +2311,5 @@
.rename = ocfs2_rename,
.setattr = ocfs2_setattr,
.getattr = ocfs2_getattr,
+ .permission = ocfs2_permission,
};