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-rw-r--r--test/syscalls/linux/BUILD5
-rw-r--r--test/syscalls/linux/inotify.cc176
2 files changed, 168 insertions, 13 deletions
diff --git a/test/syscalls/linux/BUILD b/test/syscalls/linux/BUILD
index 5acdb8438..f4b5de18d 100644
--- a/test/syscalls/linux/BUILD
+++ b/test/syscalls/linux/BUILD
@@ -951,6 +951,7 @@ cc_binary(
"//test/util:epoll_util",
"//test/util:file_descriptor",
"//test/util:fs_util",
+ "//test/util:posix_error",
"//test/util:temp_path",
"//test/util:test_main",
"//test/util:test_util",
@@ -1382,7 +1383,7 @@ cc_binary(
srcs = ["partial_bad_buffer.cc"],
linkstatic = 1,
deps = [
- "//test/syscalls/linux:socket_test_util",
+ ":socket_test_util",
"//test/util:file_descriptor",
"//test/util:fs_util",
"@com_google_absl//absl/time",
@@ -3461,7 +3462,7 @@ cc_binary(
deps = [
":socket_test_util",
gtest,
- "//test/syscalls/linux:socket_netlink_route_util",
+ ":socket_netlink_route_util",
"//test/util:capability_util",
"//test/util:file_descriptor",
"//test/util:fs_util",
diff --git a/test/syscalls/linux/inotify.cc b/test/syscalls/linux/inotify.cc
index 0e13ad190..e4565467b 100644
--- a/test/syscalls/linux/inotify.cc
+++ b/test/syscalls/linux/inotify.cc
@@ -33,6 +33,7 @@
#include "test/util/epoll_util.h"
#include "test/util/file_descriptor.h"
#include "test/util/fs_util.h"
+#include "test/util/posix_error.h"
#include "test/util/temp_path.h"
#include "test/util/test_util.h"
#include "test/util/thread_util.h"
@@ -335,6 +336,11 @@ TEST(Inotify, InotifyFdNotWritable) {
EXPECT_THAT(write(fd.get(), "x", 1), SyscallFailsWithErrno(EBADF));
}
+TEST(Inotify, InitFlags) {
+ EXPECT_THAT(inotify_init1(IN_NONBLOCK | IN_CLOEXEC), SyscallSucceeds());
+ EXPECT_THAT(inotify_init1(12345), SyscallFailsWithErrno(EINVAL));
+}
+
TEST(Inotify, NonBlockingReadReturnsEagain) {
const FileDescriptor fd =
ASSERT_NO_ERRNO_AND_VALUE(InotifyInit1(IN_NONBLOCK));
@@ -395,7 +401,7 @@ TEST(Inotify, CanDeleteFileAfterRemovingWatch) {
file1.reset();
}
-TEST(Inotify, CanRemoveWatchAfterDeletingFile) {
+TEST(Inotify, RemoveWatchAfterDeletingFileFails) {
const TempPath root = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir());
TempPath file1 =
ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFileIn(root.path()));
@@ -491,17 +497,23 @@ TEST(Inotify, DeletingChildGeneratesEvents) {
Event(IN_DELETE, root_wd, Basename(file1_path))}));
}
+// Creating a file in "parent/child" should generate events for child, but not
+// parent.
TEST(Inotify, CreatingFileGeneratesEvents) {
- const TempPath root = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir());
+ const TempPath parent = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir());
+ const TempPath child =
+ ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDirIn(parent.path()));
const FileDescriptor fd =
ASSERT_NO_ERRNO_AND_VALUE(InotifyInit1(IN_NONBLOCK));
+ ASSERT_NO_ERRNO_AND_VALUE(
+ InotifyAddWatch(fd.get(), parent.path(), IN_ALL_EVENTS));
const int wd = ASSERT_NO_ERRNO_AND_VALUE(
- InotifyAddWatch(fd.get(), root.path(), IN_ALL_EVENTS));
+ InotifyAddWatch(fd.get(), child.path(), IN_ALL_EVENTS));
// Create a new file in the directory.
const TempPath file1 =
- ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFileIn(root.path()));
+ ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFileIn(child.path()));
const std::vector<Event> events =
ASSERT_NO_ERRNO_AND_VALUE(DrainEvents(fd.get()));
@@ -554,6 +566,47 @@ TEST(Inotify, WritingFileGeneratesModifyEvent) {
ASSERT_THAT(events, Are({Event(IN_MODIFY, wd, Basename(file1.path()))}));
}
+TEST(Inotify, SizeZeroReadWriteGeneratesNothing) {
+ const TempPath root = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir());
+ const FileDescriptor fd =
+ ASSERT_NO_ERRNO_AND_VALUE(InotifyInit1(IN_NONBLOCK));
+ const TempPath file1 =
+ ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFileIn(root.path()));
+
+ const FileDescriptor file1_fd =
+ ASSERT_NO_ERRNO_AND_VALUE(Open(file1.path(), O_RDWR));
+ ASSERT_NO_ERRNO_AND_VALUE(
+ InotifyAddWatch(fd.get(), root.path(), IN_ALL_EVENTS));
+
+ // Read from the empty file.
+ int val;
+ ASSERT_THAT(read(file1_fd.get(), &val, sizeof(val)),
+ SyscallSucceedsWithValue(0));
+
+ // Write zero bytes.
+ ASSERT_THAT(write(file1_fd.get(), "", 0), SyscallSucceedsWithValue(0));
+
+ const std::vector<Event> events =
+ ASSERT_NO_ERRNO_AND_VALUE(DrainEvents(fd.get()));
+ ASSERT_THAT(events, Are({}));
+}
+
+TEST(Inotify, FailedFileCreationGeneratesNoEvents) {
+ const TempPath dir = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir());
+ const FileDescriptor fd =
+ ASSERT_NO_ERRNO_AND_VALUE(InotifyInit1(IN_NONBLOCK));
+ ASSERT_NO_ERRNO_AND_VALUE(
+ InotifyAddWatch(fd.get(), dir.path(), IN_ALL_EVENTS));
+
+ const char* p = dir.path().c_str();
+ ASSERT_THAT(mkdir(p, 0777), SyscallFails());
+ ASSERT_THAT(mknod(p, S_IFIFO, 0777), SyscallFails());
+ ASSERT_THAT(symlink(p, p), SyscallFails());
+ ASSERT_THAT(link(p, p), SyscallFails());
+ std::vector<Event> events = ASSERT_NO_ERRNO_AND_VALUE(DrainEvents(fd.get()));
+ ASSERT_THAT(events, Are({}));
+}
+
TEST(Inotify, WatchSetAfterOpenReportsCloseFdEvent) {
const TempPath root = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir());
const FileDescriptor fd =
@@ -602,7 +655,7 @@ TEST(Inotify, ChildrenDeletionInWatchedDirGeneratesEvent) {
Event(IN_DELETE | IN_ISDIR, wd, Basename(dir1_path))}));
}
-TEST(Inotify, WatchTargetDeletionGeneratesEvent) {
+TEST(Inotify, RmdirOnWatchedTargetGeneratesEvent) {
const TempPath root = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir());
const FileDescriptor fd =
ASSERT_NO_ERRNO_AND_VALUE(InotifyInit1(IN_NONBLOCK));
@@ -1228,7 +1281,7 @@ TEST(Inotify, LinkGeneratesAttribAndCreateEvents) {
InotifyAddWatch(fd.get(), file1.path(), IN_ALL_EVENTS));
const int rc = link(file1.path().c_str(), link1.path().c_str());
- // link(2) is only supported on tmpfs in the sandbox.
+ // NOTE(b/34861058): link(2) is only supported on tmpfs in the sandbox.
SKIP_IF(IsRunningOnGvisor() && rc != 0 &&
(errno == EPERM || errno == ENOENT));
ASSERT_THAT(rc, SyscallSucceeds());
@@ -1322,21 +1375,27 @@ TEST(Inotify, HardlinksReuseSameWatch) {
Event(IN_DELETE, root_wd, Basename(file1_path))}));
}
+// Calling mkdir within "parent/child" should generate an event for child, but
+// not parent.
TEST(Inotify, MkdirGeneratesCreateEventWithDirFlag) {
- const TempPath root = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir());
+ const TempPath parent = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir());
+ const TempPath child =
+ ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDirIn(parent.path()));
const FileDescriptor fd =
ASSERT_NO_ERRNO_AND_VALUE(InotifyInit1(IN_NONBLOCK));
- const int root_wd = ASSERT_NO_ERRNO_AND_VALUE(
- InotifyAddWatch(fd.get(), root.path(), IN_ALL_EVENTS));
+ ASSERT_NO_ERRNO_AND_VALUE(
+ InotifyAddWatch(fd.get(), parent.path(), IN_ALL_EVENTS));
+ const int child_wd = ASSERT_NO_ERRNO_AND_VALUE(
+ InotifyAddWatch(fd.get(), child.path(), IN_ALL_EVENTS));
- const TempPath dir1(NewTempAbsPathInDir(root.path()));
+ const TempPath dir1(NewTempAbsPathInDir(child.path()));
ASSERT_THAT(mkdir(dir1.path().c_str(), 0777), SyscallSucceeds());
const std::vector<Event> events =
ASSERT_NO_ERRNO_AND_VALUE(DrainEvents(fd.get()));
ASSERT_THAT(
events,
- Are({Event(IN_CREATE | IN_ISDIR, root_wd, Basename(dir1.path()))}));
+ Are({Event(IN_CREATE | IN_ISDIR, child_wd, Basename(dir1.path()))}));
}
TEST(Inotify, MultipleInotifyInstancesAndWatchesAllGetEvents) {
@@ -1597,6 +1656,8 @@ TEST(Inotify, EpollNoDeadlock) {
}
TEST(Inotify, SpliceEvent) {
+ // TODO(gvisor.dev/issue/138): Implement splice in VFS2.
+ SKIP_IF(IsRunningOnGvisor() && !IsRunningWithVFS1());
int pipes[2];
ASSERT_THAT(pipe2(pipes, O_NONBLOCK), SyscallSucceeds());
@@ -1624,6 +1685,99 @@ TEST(Inotify, SpliceEvent) {
ASSERT_THAT(events, Are({Event(IN_ACCESS, watcher)}));
}
+// Watches on a parent should not be triggered by actions on a hard link to one
+// of its children that has a different parent.
+TEST(Inotify, LinkOnOtherParent) {
+ const TempPath dir1 = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir());
+ const TempPath dir2 = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir());
+ const TempPath file =
+ ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFileIn(dir1.path()));
+ std::string link_path = NewTempAbsPathInDir(dir2.path());
+
+ const int rc = link(file.path().c_str(), link_path.c_str());
+ // NOTE(b/34861058): link(2) is only supported on tmpfs in the sandbox.
+ SKIP_IF(IsRunningOnGvisor() && rc != 0 &&
+ (errno == EPERM || errno == ENOENT));
+ ASSERT_THAT(rc, SyscallSucceeds());
+
+ const FileDescriptor inotify_fd =
+ ASSERT_NO_ERRNO_AND_VALUE(InotifyInit1(IN_NONBLOCK));
+ ASSERT_NO_ERRNO_AND_VALUE(
+ InotifyAddWatch(inotify_fd.get(), dir1.path(), IN_ALL_EVENTS));
+
+ // Perform various actions on the link outside of dir1, which should trigger
+ // no inotify events.
+ const FileDescriptor fd =
+ ASSERT_NO_ERRNO_AND_VALUE(Open(link_path.c_str(), O_RDWR));
+ int val = 0;
+ ASSERT_THAT(write(fd.get(), &val, sizeof(val)), SyscallSucceeds());
+ ASSERT_THAT(read(fd.get(), &val, sizeof(val)), SyscallSucceeds());
+ ASSERT_THAT(ftruncate(fd.get(), 12345), SyscallSucceeds());
+ ASSERT_THAT(unlink(link_path.c_str()), SyscallSucceeds());
+ const std::vector<Event> events =
+ ASSERT_NO_ERRNO_AND_VALUE(DrainEvents(inotify_fd.get()));
+ EXPECT_THAT(events, Are({}));
+}
+
+TEST(Inotify, Exec) {
+ const TempPath dir = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir());
+ const TempPath bin = ASSERT_NO_ERRNO_AND_VALUE(
+ TempPath::CreateSymlinkTo(dir.path(), "/bin/true"));
+
+ const FileDescriptor fd =
+ ASSERT_NO_ERRNO_AND_VALUE(InotifyInit1(IN_NONBLOCK));
+ const int wd = ASSERT_NO_ERRNO_AND_VALUE(
+ InotifyAddWatch(fd.get(), bin.path(), IN_ALL_EVENTS));
+
+ // Perform exec.
+ ScopedThread t([&bin]() {
+ ASSERT_THAT(execl(bin.path().c_str(), bin.path().c_str(), (char*)nullptr),
+ SyscallSucceeds());
+ });
+ t.Join();
+
+ std::vector<Event> events = ASSERT_NO_ERRNO_AND_VALUE(DrainEvents(fd.get()));
+ EXPECT_THAT(events, Are({Event(IN_OPEN, wd), Event(IN_ACCESS, wd)}));
+}
+
+// Watches without IN_EXCL_UNLINK, should continue to emit events for file
+// descriptors after their corresponding files have been unlinked.
+//
+// We need to disable S/R because there are filesystems where we cannot re-open
+// fds to an unlinked file across S/R, e.g. gofer-backed filesytems.
+TEST(Inotify, IncludeUnlinkedFile_NoRandomSave) {
+ const DisableSave ds;
+
+ const TempPath dir = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir());
+ const TempPath file = ASSERT_NO_ERRNO_AND_VALUE(
+ TempPath::CreateFileWith(dir.path(), "123", TempPath::kDefaultFileMode));
+
+ const FileDescriptor fd =
+ ASSERT_NO_ERRNO_AND_VALUE(Open(file.path(), O_RDWR));
+
+ const FileDescriptor inotify_fd =
+ ASSERT_NO_ERRNO_AND_VALUE(InotifyInit1(IN_NONBLOCK));
+ const int dir_wd = ASSERT_NO_ERRNO_AND_VALUE(
+ InotifyAddWatch(inotify_fd.get(), dir.path(), IN_ALL_EVENTS));
+ const int file_wd = ASSERT_NO_ERRNO_AND_VALUE(
+ InotifyAddWatch(inotify_fd.get(), file.path(), IN_ALL_EVENTS));
+
+ ASSERT_THAT(unlink(file.path().c_str()), SyscallSucceeds());
+ int val = 0;
+ ASSERT_THAT(read(fd.get(), &val, sizeof(val)), SyscallSucceeds());
+ ASSERT_THAT(write(fd.get(), &val, sizeof(val)), SyscallSucceeds());
+ const std::vector<Event> events =
+ ASSERT_NO_ERRNO_AND_VALUE(DrainEvents(inotify_fd.get()));
+ EXPECT_THAT(events, Are({
+ Event(IN_ATTRIB, file_wd),
+ Event(IN_DELETE, dir_wd, Basename(file.path())),
+ Event(IN_ACCESS, dir_wd, Basename(file.path())),
+ Event(IN_ACCESS, file_wd),
+ Event(IN_MODIFY, dir_wd, Basename(file.path())),
+ Event(IN_MODIFY, file_wd),
+ }));
+}
+
} // namespace
} // namespace testing
} // namespace gvisor
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-06 12:32:37 +0000