return NULL;
}
+static u64 nfs_access_login_time(const struct task_struct *task,
+ const struct cred *cred)
+{
+ const struct task_struct *parent;
+ u64 ret;
+
+ rcu_read_lock();
+ for (;;) {
+ parent = rcu_dereference(task->real_parent);
+ if (parent == task || cred_fscmp(parent->cred, cred) != 0)
+ break;
+ task = parent;
+ }
+ ret = task->start_time;
+ rcu_read_unlock();
+ return ret;
+}
+
static int nfs_access_get_cached_locked(struct inode *inode, const struct cred *cred, u32 *mask, bool may_block)
{
struct nfs_inode *nfsi = NFS_I(inode);
+ u64 login_time = nfs_access_login_time(current, cred);
struct nfs_access_entry *cache;
bool retry = true;
int err;
spin_lock(&inode->i_lock);
retry = false;
}
+ err = -ENOENT;
+ if ((s64)(login_time - cache->timestamp) > 0)
+ goto out;
*mask = cache->mask;
list_move_tail(&cache->lru, &nfsi->access_cache_entry_lru);
err = 0;
else
goto found;
}
+ set->timestamp = ktime_get_ns();
rb_link_node(&set->rb_node, parent, p);
rb_insert_color(&set->rb_node, root_node);
list_add_tail(&set->lru, &nfsi->access_cache_entry_lru);