Check in gVisor.

PiperOrigin-RevId: 194583126
Change-Id: Ica1d8821a90f74e7e745962d71801c598c652463

1 files changed, 97 insertions, 0 deletions

diff --git a/pkg/abi/linux/inotify.go b/pkg/abi/linux/inotify.go
new file mode 100644
index 000000000..072a2d146
--- /dev/null
+++ b/pkg/abi/linux/inotify.go
@@ -0,0 +1,97 @@
+// Copyright 2018 Google Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package linux
+
+// Inotify events observable by userspace. These directly correspond to
+// filesystem operations and there may only be a single of them per inotify
+// event read from an inotify fd.
+const (
+	// IN_ACCESS indicates a file was accessed.
+	IN_ACCESS = 0x00000001
+	// IN_MODIFY indicates a file was modified.
+	IN_MODIFY = 0x00000002
+	// IN_ATTRIB indicates a watch target's metadata changed.
+	IN_ATTRIB = 0x00000004
+	// IN_CLOSE_WRITE indicates a writable file was closed.
+	IN_CLOSE_WRITE = 0x00000008
+	// IN_CLOSE_NOWRITE indicates a non-writable file was closed.
+	IN_CLOSE_NOWRITE = 0x00000010
+	// IN_OPEN indicates a file was opened.
+	IN_OPEN = 0x00000020
+	// IN_MOVED_FROM indicates a file was moved from X.
+	IN_MOVED_FROM = 0x00000040
+	// IN_MOVED_TO indicates a file was moved to Y.
+	IN_MOVED_TO = 0x00000080
+	// IN_CREATE indicates a file was created in a watched directory.
+	IN_CREATE = 0x00000100
+	// IN_DELETE indicates a file was deleted in a watched directory.
+	IN_DELETE = 0x00000200
+	// IN_DELETE_SELF indicates a watch target itself was deleted.
+	IN_DELETE_SELF = 0x00000400
+	// IN_MOVE_SELF indicates a watch target itself was moved.
+	IN_MOVE_SELF = 0x00000800
+	// IN_ALL_EVENTS is a mask for all observable userspace events.
+	IN_ALL_EVENTS = 0x00000fff
+)
+
+// Inotify control events. These may be present in their own events, or ORed
+// with other observable events.
+const (
+	// IN_UNMOUNT indicates the backing filesystem was unmounted.
+	IN_UNMOUNT = 0x00002000
+	// IN_Q_OVERFLOW indicates the event queued overflowed.
+	IN_Q_OVERFLOW = 0x00004000
+	// IN_IGNORED indicates a watch was removed, either implicitly or through
+	// inotify_rm_watch(2).
+	IN_IGNORED = 0x00008000
+	// IN_ISDIR indicates the subject of an event was a directory.
+	IN_ISDIR = 0x40000000
+)
+
+// Feature flags for inotify_add_watch(2).
+const (
+	// IN_ONLYDIR indicates that a path should be watched only if it's a
+	// directory.
+	IN_ONLYDIR = 0x01000000
+	// IN_DONT_FOLLOW indicates that the watch path shouldn't be resolved if
+	// it's a symlink.
+	IN_DONT_FOLLOW = 0x02000000
+	// IN_EXCL_UNLINK indicates events to this watch from unlinked objects
+	// should be filtered out.
+	IN_EXCL_UNLINK = 0x04000000
+	// IN_MASK_ADD indicates the provided mask should be ORed into any existing
+	// watch on the provided path.
+	IN_MASK_ADD = 0x20000000
+	// IN_ONESHOT indicates the watch should be removed after one event.
+	IN_ONESHOT = 0x80000000
+)
+
+// Feature flags for inotify_init1(2).
+const (
+	// IN_CLOEXEC is an alias for O_CLOEXEC. It indicates that the inotify
+	// fd should be closed on exec(2) and friends.
+	IN_CLOEXEC = 0x00080000
+	// IN_NONBLOCK is an alias for O_NONBLOCK. It indicates I/O syscall on the
+	// inotify fd should not block.
+	IN_NONBLOCK = 0x00000800
+)
+
+// ALL_INOTIFY_BITS contains all the bits for all possible inotify events. It's
+// defined in the Linux source at "include/linux/inotify.h".
+const ALL_INOTIFY_BITS = IN_ACCESS | IN_MODIFY | IN_ATTRIB | IN_CLOSE_WRITE |
+	IN_CLOSE_NOWRITE | IN_OPEN | IN_MOVED_FROM | IN_MOVED_TO | IN_CREATE |
+	IN_DELETE | IN_DELETE_SELF | IN_MOVE_SELF | IN_UNMOUNT | IN_Q_OVERFLOW |
+	IN_IGNORED | IN_ONLYDIR | IN_DONT_FOLLOW | IN_EXCL_UNLINK | IN_MASK_ADD |
+	IN_ISDIR | IN_ONESHOT