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authorAmir Goldstein <amir73il@gmail.com>2018-06-23 17:54:49 +0300
committerJan Kara <jack@suse.cz>2018-06-27 13:45:05 +0200
commit36f10f55ff1d2867bfc48ed898a9cc0dc6b49dd2 (patch)
tree0b7a840c5c8e0b2bd44aeca2c21a144b25d89457 /fs/notify/mark.c
parentb812a9f5896379b6cff2ac168ddb5b89037d8e78 (diff)
downloadlinux-36f10f55ff1d2867bfc48ed898a9cc0dc6b49dd2.tar.bz2
fsnotify: let connector point to an abstract object
Make the code to attach/detach a connector to object more generic by letting the fsnotify connector point to an abstract fsnotify_connp_t. Code that needs to dereference an inode or mount object now uses the helpers fsnotify_conn_{inode,mount}. Signed-off-by: Amir Goldstein <amir73il@gmail.com> Signed-off-by: Jan Kara <jack@suse.cz>
Diffstat (limited to 'fs/notify/mark.c')
-rw-r--r--fs/notify/mark.c32
1 files changed, 16 insertions, 16 deletions
diff --git a/fs/notify/mark.c b/fs/notify/mark.c
index 7abb73b5beba..959bc73aaae7 100644
--- a/fs/notify/mark.c
+++ b/fs/notify/mark.c
@@ -120,14 +120,14 @@ static void __fsnotify_recalc_mask(struct fsnotify_mark_connector *conn)
new_mask |= mark->mask;
}
if (conn->type == FSNOTIFY_OBJ_TYPE_INODE)
- conn->inode->i_fsnotify_mask = new_mask;
+ fsnotify_conn_inode(conn)->i_fsnotify_mask = new_mask;
else if (conn->type == FSNOTIFY_OBJ_TYPE_VFSMOUNT)
- real_mount(conn->mnt)->mnt_fsnotify_mask = new_mask;
+ fsnotify_conn_mount(conn)->mnt_fsnotify_mask = new_mask;
}
/*
* Calculate mask of events for a list of marks. The caller must make sure
- * connector and connector->inode cannot disappear under us. Callers achieve
+ * connector and connector->obj cannot disappear under us. Callers achieve
* this by holding a mark->lock or mark->group->mark_mutex for a mark on this
* list.
*/
@@ -140,7 +140,8 @@ void fsnotify_recalc_mask(struct fsnotify_mark_connector *conn)
__fsnotify_recalc_mask(conn);
spin_unlock(&conn->lock);
if (conn->type == FSNOTIFY_OBJ_TYPE_INODE)
- __fsnotify_update_child_dentry_flags(conn->inode);
+ __fsnotify_update_child_dentry_flags(
+ fsnotify_conn_inode(conn));
}
/* Free all connectors queued for freeing once SRCU period ends */
@@ -166,20 +167,20 @@ static struct inode *fsnotify_detach_connector_from_object(
{
struct inode *inode = NULL;
+ if (conn->type == FSNOTIFY_OBJ_TYPE_DETACHED)
+ return NULL;
+
if (conn->type == FSNOTIFY_OBJ_TYPE_INODE) {
- inode = conn->inode;
- rcu_assign_pointer(inode->i_fsnotify_marks, NULL);
+ inode = fsnotify_conn_inode(conn);
inode->i_fsnotify_mask = 0;
- conn->inode = NULL;
- conn->type = FSNOTIFY_OBJ_TYPE_DETACHED;
} else if (conn->type == FSNOTIFY_OBJ_TYPE_VFSMOUNT) {
- rcu_assign_pointer(real_mount(conn->mnt)->mnt_fsnotify_marks,
- NULL);
- real_mount(conn->mnt)->mnt_fsnotify_mask = 0;
- conn->mnt = NULL;
- conn->type = FSNOTIFY_OBJ_TYPE_DETACHED;
+ fsnotify_conn_mount(conn)->mnt_fsnotify_mask = 0;
}
+ rcu_assign_pointer(*(conn->obj), NULL);
+ conn->obj = NULL;
+ conn->type = FSNOTIFY_OBJ_TYPE_DETACHED;
+
return inode;
}
@@ -448,10 +449,9 @@ static int fsnotify_attach_connector_to_object(fsnotify_connp_t *connp,
spin_lock_init(&conn->lock);
INIT_HLIST_HEAD(&conn->list);
conn->type = type;
+ conn->obj = connp;
if (conn->type == FSNOTIFY_OBJ_TYPE_INODE)
- inode = conn->inode = igrab(fsnotify_obj_inode(connp));
- else if (conn->type == FSNOTIFY_OBJ_TYPE_VFSMOUNT)
- conn->mnt = &fsnotify_obj_mount(connp)->mnt;
+ inode = igrab(fsnotify_conn_inode(conn));
/*
* cmpxchg() provides the barrier so that readers of *connp can see
* only initialized structure