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Diffstat (limited to 'fs/afs/callback.c')
-rw-r--r--fs/afs/callback.c44
1 files changed, 42 insertions, 2 deletions
diff --git a/fs/afs/callback.c b/fs/afs/callback.c
index 7d9b23d981bf..1b4d5809808d 100644
--- a/fs/afs/callback.c
+++ b/fs/afs/callback.c
@@ -21,6 +21,37 @@
#include "internal.h"
/*
+ * Handle invalidation of an mmap'd file. We invalidate all the PTEs referring
+ * to the pages in this file's pagecache, forcing the kernel to go through
+ * ->fault() or ->page_mkwrite() - at which point we can handle invalidation
+ * more fully.
+ */
+void afs_invalidate_mmap_work(struct work_struct *work)
+{
+ struct afs_vnode *vnode = container_of(work, struct afs_vnode, cb_work);
+
+ unmap_mapping_pages(vnode->vfs_inode.i_mapping, 0, 0, false);
+}
+
+void afs_server_init_callback_work(struct work_struct *work)
+{
+ struct afs_server *server = container_of(work, struct afs_server, initcb_work);
+ struct afs_vnode *vnode;
+ struct afs_cell *cell = server->cell;
+
+ down_read(&cell->fs_open_mmaps_lock);
+
+ list_for_each_entry(vnode, &cell->fs_open_mmaps, cb_mmap_link) {
+ if (vnode->cb_server == server) {
+ clear_bit(AFS_VNODE_CB_PROMISED, &vnode->flags);
+ queue_work(system_unbound_wq, &vnode->cb_work);
+ }
+ }
+
+ up_read(&cell->fs_open_mmaps_lock);
+}
+
+/*
* Allow the fileserver to request callback state (re-)initialisation.
* Unfortunately, UUIDs are not guaranteed unique.
*/
@@ -29,8 +60,11 @@ void afs_init_callback_state(struct afs_server *server)
rcu_read_lock();
do {
server->cb_s_break++;
- server = rcu_dereference(server->uuid_next);
- } while (0);
+ atomic_inc(&server->cell->fs_s_break);
+ if (!list_empty(&server->cell->fs_open_mmaps))
+ queue_work(system_unbound_wq, &server->initcb_work);
+
+ } while ((server = rcu_dereference(server->uuid_next)));
rcu_read_unlock();
}
@@ -44,11 +78,17 @@ void __afs_break_callback(struct afs_vnode *vnode, enum afs_cb_break_reason reas
clear_bit(AFS_VNODE_NEW_CONTENT, &vnode->flags);
if (test_and_clear_bit(AFS_VNODE_CB_PROMISED, &vnode->flags)) {
vnode->cb_break++;
+ vnode->cb_v_break = vnode->volume->cb_v_break;
afs_clear_permits(vnode);
if (vnode->lock_state == AFS_VNODE_LOCK_WAITING_FOR_CB)
afs_lock_may_be_available(vnode);
+ if (reason != afs_cb_break_for_deleted &&
+ vnode->status.type == AFS_FTYPE_FILE &&
+ atomic_read(&vnode->cb_nr_mmap))
+ queue_work(system_unbound_wq, &vnode->cb_work);
+
trace_afs_cb_break(&vnode->fid, vnode->cb_break, reason, true);
} else {
trace_afs_cb_break(&vnode->fid, vnode->cb_break, reason, false);