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fusefs: fix the FUSE_INTERRUPT tests when data_cache_mode==2

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Replace most write operations with mkdir so they won't be affected by the
setting of vfs.fusefs.data_cache_mode.

Sponsored by:	The FreeBSD Foundation
This commit is contained in:
Alan Somers 2019-04-24 14:25:35 +00:00
parent 21d4686c5c
commit 9a17702912
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/projects/fuse2/; revision=346637
1 changed files with 113 additions and 230 deletions
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343
tests/sys/fs/fusefs/interrupt.cc
View File

@ -45,6 +45,10 @@ using namespace testing;
/* Initial size of files used by these tests */
const off_t FILESIZE = 1000;
/* Access mode used by all directories in these tests */
const mode_t MODE = 0755;
const char FULLDIRPATH0[] = "mountpoint/some_dir";
const char RELDIRPATH0[] = "some_dir";
static sem_t *signaled_semaphore;
@ -82,6 +86,23 @@ void expect_lookup(const char *relpath, uint64_t ino)
FuseTest::expect_lookup(relpath, ino, S_IFREG | 0644, FILESIZE, 1);
}
/*
* Expect a FUSE_MKDIR but don't reply. Instead, just record the unique value
* to the provided pointer
*/
void expect_mkdir(uint64_t *mkdir_unique)
{
EXPECT_CALL(*m_mock, process(
ResultOf([=](auto in) {
return (in->header.opcode == FUSE_MKDIR);
}, Eq(true)),
_)
).WillOnce(Invoke([=](auto in, auto &out __unused) {
*mkdir_unique = in->header.unique;
}));
}
/*
* Expect a FUSE_READ but don't reply. Instead, just record the unique value
* to the provided pointer
@ -149,32 +170,27 @@ void TearDown() {
/* https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=236530 */
TEST_F(Interrupt, already_complete)
{
const char FULLPATH[] = "mountpoint/some_file.txt";
const char RELPATH[] = "some_file.txt";
const char *CONTENTS = "abcdefgh";
uint64_t ino = 42;
int fd;
ssize_t bufsize = strlen(CONTENTS);
pthread_t self;
uint64_t write_unique = 0;
uint64_t mkdir_unique = 0;
self = pthread_self();
expect_lookup(RELPATH, ino);
expect_open(ino, 0, 1);
expect_write(ino, &write_unique);
EXPECT_LOOKUP(1, RELDIRPATH0).WillOnce(Invoke(ReturnErrno(ENOENT)));
expect_mkdir(&mkdir_unique);
EXPECT_CALL(*m_mock, process(
ResultOf([&](auto in) {
return (in->header.opcode == FUSE_INTERRUPT &&
in->body.interrupt.unique == write_unique);
in->body.interrupt.unique == mkdir_unique);
}, Eq(true)),
_)
).WillOnce(Invoke([&](auto in, auto &out) {
// First complete the write request
// First complete the mkdir request
auto out0 = new mockfs_buf_out;
out0->header.unique = write_unique;
SET_OUT_HEADER_LEN(out0, write);
out0->body.write.size = bufsize;
out0->header.unique = mkdir_unique;
SET_OUT_HEADER_LEN(out0, entry);
out0->body.create.entry.attr.mode = S_IFDIR | MODE;
out0->body.create.entry.nodeid = ino;
out.push_back(out0);
// Then, respond EAGAIN to the interrupt request
@ -185,13 +201,8 @@ TEST_F(Interrupt, already_complete)
out.push_back(out1);
}));
fd = open(FULLPATH, O_WRONLY);
ASSERT_LE(0, fd) << strerror(errno);
setup_interruptor(self);
EXPECT_EQ(bufsize, write(fd, CONTENTS, bufsize)) << strerror(errno);
/* Deliberately leak fd. close(2) will be tested in release.cc */
EXPECT_EQ(0, mkdir(FULLDIRPATH0, MODE)) << strerror(errno);
}
/*
@ -200,45 +211,31 @@ TEST_F(Interrupt, already_complete)
*/
TEST_F(Interrupt, fatal_signal)
{
const char FULLPATH[] = "mountpoint/some_file.txt";
const char *CONTENTS = "abcdefgh";
const char RELPATH[] = "some_file.txt";
ssize_t bufsize = strlen(CONTENTS);
uint64_t ino = 42;
int status;
pthread_t self;
uint64_t write_unique;
uint64_t mkdir_unique;
self = pthread_self();
expect_lookup(RELPATH, ino);
expect_open(ino, 0, 1);
expect_write(ino, &write_unique);
EXPECT_LOOKUP(1, RELDIRPATH0).WillOnce(Invoke(ReturnErrno(ENOENT)));
expect_mkdir(&mkdir_unique);
EXPECT_CALL(*m_mock, process(
ResultOf([&](auto in) {
return (in->header.opcode == FUSE_INTERRUPT &&
in->body.interrupt.unique == write_unique);
in->body.interrupt.unique == mkdir_unique);
}, Eq(true)),
_)
).WillOnce(Invoke([&](auto in __unused, auto &out __unused) {
/* Don't respond. The process should exit anyway */
}));
expect_flush(ino, 1, ReturnErrno(0));
expect_release(ino, FH);
fork(false, &status, [&] {
}, [&]() {
struct sigaction sa;
int fd, r;
int r;
pthread_t killer_th;
pthread_t self;
fd = open(FULLPATH, O_WRONLY);
if (fd < 0) {
perror("open");
return 1;
}
/* SIGUSR2 terminates the process by default */
bzero(&sa, sizeof(sa));
sa.sa_handler = SIG_DFL;
@ -254,12 +251,10 @@ TEST_F(Interrupt, fatal_signal)
return 1;
}
write(fd, CONTENTS, bufsize);
mkdir(FULLDIRPATH0, MODE);
return 1;
});
ASSERT_EQ(SIGUSR2, WTERMSIG(status));
/* Deliberately leak fd. close(2) will be tested in release.cc */
}
/*
@ -269,45 +264,45 @@ TEST_F(Interrupt, fatal_signal)
/* https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=236530 */
TEST_F(Interrupt, ignore)
{
const char FULLPATH[] = "mountpoint/some_file.txt";
const char RELPATH[] = "some_file.txt";
const char *CONTENTS = "abcdefgh";
uint64_t ino = 42;
int fd;
ssize_t bufsize = strlen(CONTENTS);
pthread_t self;
uint64_t write_unique;
uint64_t mkdir_unique;
self = pthread_self();
expect_lookup(RELPATH, ino);
expect_open(ino, 0, 1);
expect_write(ino, &write_unique);
EXPECT_LOOKUP(1, RELDIRPATH0).WillOnce(Invoke(ReturnErrno(ENOENT)));
expect_mkdir(&mkdir_unique);
EXPECT_CALL(*m_mock, process(
ResultOf([&](auto in) {
return (in->header.opcode == FUSE_INTERRUPT &&
in->body.interrupt.unique == write_unique);
in->body.interrupt.unique == mkdir_unique);
}, Eq(true)),
_)
).WillOnce(Invoke([&](auto in __unused, auto &out) {
// Ignore FUSE_INTERRUPT; respond to the FUSE_WRITE
auto out0 = new mockfs_buf_out;
out0->header.unique = write_unique;
SET_OUT_HEADER_LEN(out0, write);
out0->body.write.size = bufsize;
out0->header.unique = mkdir_unique;
SET_OUT_HEADER_LEN(out0, entry);
out0->body.create.entry.attr.mode = S_IFDIR | MODE;
out0->body.create.entry.nodeid = ino;
out.push_back(out0);
}));
fd = open(FULLPATH, O_WRONLY);
ASSERT_LE(0, fd) << strerror(errno);
setup_interruptor(self);
ASSERT_EQ(bufsize, write(fd, CONTENTS, bufsize)) << strerror(errno);
/* Deliberately leak fd. close(2) will be tested in release.cc */
ASSERT_EQ(0, mkdir(FULLDIRPATH0, MODE)) << strerror(errno);
}
void* write0(void* arg) {
void* mkdir0(void* arg __unused) {
ssize_t r;
r = mkdir(FULLDIRPATH0, MODE);
if (r >= 0)
return 0;
else
return (void*)(intptr_t)errno;
}
void* setxattr0(void* arg) {
const char *CONTENTS = "abcdefgh";
ssize_t bufsize = strlen(CONTENTS);
int fd = (int)(intptr_t)arg;
@ -333,75 +328,6 @@ void* read1(void* arg) {
return (void*)(intptr_t)errno;
}
/*
* An operation that hasn't yet been sent to userland can be interrupted
* without sending FUSE_INTERRUPT
*/
TEST_F(Interrupt, in_kernel)
{
const char FULLPATH0[] = "mountpoint/some_file.txt";
const char RELPATH0[] = "some_file.txt";
const char FULLPATH1[] = "mountpoint/other_file.txt";
const char RELPATH1[] = "other_file.txt";
const char *CONTENTS = "ijklmnop";
ssize_t bufsize = strlen(CONTENTS);
uint64_t ino0 = 42, ino1 = 43;
int fd0, fd1;
pthread_t self, th0;
sem_t sem0, sem1;
void *thr0_value;
ASSERT_EQ(0, sem_init(&sem0, 0, 0)) << strerror(errno);
ASSERT_EQ(0, sem_init(&sem1, 0, 0)) << strerror(errno);
self = pthread_self();
expect_lookup(RELPATH0, ino0);
expect_open(ino0, 0, 1);
expect_lookup(RELPATH1, ino1);
expect_open(ino1, 0, 1);
EXPECT_CALL(*m_mock, process(
ResultOf([=](auto in) {
return (in->header.opcode == FUSE_WRITE &&
in->header.nodeid == ino0);
}, Eq(true)),
_)
).WillOnce(Invoke(ReturnImmediate([&](auto in, auto out) {
/* Let the next write proceed */
sem_post(&sem1);
/* Pause the daemon thread so it won't read the next op */
sem_wait(&sem0);
SET_OUT_HEADER_LEN(out, write);
out->body.write.size = in->body.write.size;
})));
fd0 = open(FULLPATH0, O_WRONLY);
ASSERT_LE(0, fd0) << strerror(errno);
fd1 = open(FULLPATH1, O_WRONLY);
ASSERT_LE(0, fd1) << strerror(errno);
/* Use a separate thread for the first write */
ASSERT_EQ(0, pthread_create(&th0, NULL, write0, (void*)(intptr_t)fd0))
<< strerror(errno);
setup_interruptor(self);
sem_wait(&sem1); /* Sequence the two writes */
ASSERT_EQ(-1, write(fd1, CONTENTS, bufsize));
EXPECT_EQ(EINTR, errno);
/* Unstick the daemon */
ASSERT_EQ(0, sem_post(&sem0)) << strerror(errno);
/* Wait awhile to make sure the signal generates no FUSE_INTERRUPT */
usleep(250'000);
pthread_join(th0, &thr0_value);
EXPECT_EQ(0, (intptr_t)thr0_value);
sem_destroy(&sem1);
sem_destroy(&sem0);
}
/*
* A restartable operation (basically, anything except write or setextattr)
* that hasn't yet been sent to userland can be interrupted without sending
@ -409,12 +335,10 @@ TEST_F(Interrupt, in_kernel)
*/
TEST_F(Interrupt, in_kernel_restartable)
{
const char FULLPATH0[] = "mountpoint/some_file.txt";
const char RELPATH0[] = "some_file.txt";
const char FULLPATH1[] = "mountpoint/other_file.txt";
const char RELPATH1[] = "other_file.txt";
uint64_t ino0 = 42, ino1 = 43;
int fd0, fd1;
int fd1;
pthread_t self, th0, th1;
sem_t sem0, sem1;
void *thr0_value, *thr1_value;
@ -423,34 +347,31 @@ TEST_F(Interrupt, in_kernel_restartable)
ASSERT_EQ(0, sem_init(&sem1, 0, 0)) << strerror(errno);
self = pthread_self();
expect_lookup(RELPATH0, ino0);
expect_open(ino0, 0, 1);
EXPECT_LOOKUP(1, RELDIRPATH0).WillOnce(Invoke(ReturnErrno(ENOENT)));
expect_lookup(RELPATH1, ino1);
expect_open(ino1, 0, 1);
EXPECT_CALL(*m_mock, process(
ResultOf([=](auto in) {
return (in->header.opcode == FUSE_WRITE &&
in->header.nodeid == ino0);
return (in->header.opcode == FUSE_MKDIR);
}, Eq(true)),
_)
).WillOnce(Invoke(ReturnImmediate([&](auto in, auto out) {
).WillOnce(Invoke(ReturnImmediate([&](auto in __unused, auto out) {
/* Let the next write proceed */
sem_post(&sem1);
/* Pause the daemon thread so it won't read the next op */
sem_wait(&sem0);
SET_OUT_HEADER_LEN(out, write);
out->body.write.size = in->body.write.size;
SET_OUT_HEADER_LEN(out, entry);
out->body.create.entry.attr.mode = S_IFDIR | MODE;
out->body.create.entry.nodeid = ino0;
})));
FuseTest::expect_read(ino1, 0, FILESIZE, 0, NULL);
fd0 = open(FULLPATH0, O_WRONLY);
ASSERT_LE(0, fd0) << strerror(errno);
fd1 = open(FULLPATH1, O_RDONLY);
ASSERT_LE(0, fd1) << strerror(errno);
/* Use a separate thread for each operation */
ASSERT_EQ(0, pthread_create(&th0, NULL, write0, (void*)(intptr_t)fd0))
ASSERT_EQ(0, pthread_create(&th0, NULL, mkdir0, NULL))
<< strerror(errno);
sem_wait(&sem1); /* Sequence the two operations */
@ -476,21 +397,20 @@ TEST_F(Interrupt, in_kernel_restartable)
sem_destroy(&sem0);
}
/*
* Like FUSE_WRITE, FUSE_SETXATTR is non-restartable because it calls uiomove
* before blocking in fticket_wait_answ
/*
* An operation that hasn't yet been sent to userland can be interrupted
* without sending FUSE_INTERRUPT. If it's a non-restartable operation (write
* or setextattr) it will return EINTR.
*/
TEST_F(Interrupt, in_kernel_setxattr)
TEST_F(Interrupt, in_kernel_nonrestartable)
{
const char FULLPATH0[] = "mountpoint/some_file.txt";
const char RELPATH0[] = "some_file.txt";
const char FULLPATH1[] = "mountpoint/other_file.txt";
const char RELPATH1[] = "other_file.txt";
const char value[] = "whatever";
ssize_t value_len = strlen(value) + 1;
uint64_t ino0 = 42, ino1 = 43;
int ns = EXTATTR_NAMESPACE_USER;
int fd0, fd1;
int fd1;
pthread_t self, th0;
sem_t sem0, sem1;
void *thr0_value;
@ -500,33 +420,30 @@ TEST_F(Interrupt, in_kernel_setxattr)
ASSERT_EQ(0, sem_init(&sem1, 0, 0)) << strerror(errno);
self = pthread_self();
expect_lookup(RELPATH0, ino0);
expect_open(ino0, 0, 1);
EXPECT_LOOKUP(1, RELDIRPATH0).WillOnce(Invoke(ReturnErrno(ENOENT)));
expect_lookup(RELPATH1, ino1);
expect_open(ino1, 0, 1);
EXPECT_CALL(*m_mock, process(
ResultOf([=](auto in) {
return (in->header.opcode == FUSE_WRITE &&
in->header.nodeid == ino0);
return (in->header.opcode == FUSE_MKDIR);
}, Eq(true)),
_)
).WillOnce(Invoke(ReturnImmediate([&](auto in, auto out) {
).WillOnce(Invoke(ReturnImmediate([&](auto in __unused, auto out) {
/* Let the next write proceed */
sem_post(&sem1);
/* Pause the daemon thread so it won't read the next op */
sem_wait(&sem0);
SET_OUT_HEADER_LEN(out, write);
out->body.write.size = in->body.write.size;
SET_OUT_HEADER_LEN(out, entry);
out->body.create.entry.attr.mode = S_IFDIR | MODE;
out->body.create.entry.nodeid = ino0;
})));
fd0 = open(FULLPATH0, O_WRONLY);
ASSERT_LE(0, fd0) << strerror(errno);
fd1 = open(FULLPATH1, O_WRONLY);
ASSERT_LE(0, fd1) << strerror(errno);
/* Use a separate thread for the first write */
ASSERT_EQ(0, pthread_create(&th0, NULL, write0, (void*)(intptr_t)fd0))
ASSERT_EQ(0, pthread_create(&th0, NULL, mkdir0, NULL))
<< strerror(errno);
setup_interruptor(self);
@ -556,42 +473,30 @@ TEST_F(Interrupt, in_kernel_setxattr)
/* https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=236530 */
TEST_F(Interrupt, in_progress)
{
const char FULLPATH[] = "mountpoint/some_file.txt";
const char RELPATH[] = "some_file.txt";
const char *CONTENTS = "abcdefgh";
uint64_t ino = 42;
int fd;
ssize_t bufsize = strlen(CONTENTS);
pthread_t self;
uint64_t write_unique;
uint64_t mkdir_unique;
self = pthread_self();
expect_lookup(RELPATH, ino);
expect_open(ino, 0, 1);
expect_write(ino, &write_unique);
EXPECT_LOOKUP(1, RELDIRPATH0).WillOnce(Invoke(ReturnErrno(ENOENT)));
expect_mkdir(&mkdir_unique);
EXPECT_CALL(*m_mock, process(
ResultOf([&](auto in) {
return (in->header.opcode == FUSE_INTERRUPT &&
in->body.interrupt.unique == write_unique);
in->body.interrupt.unique == mkdir_unique);
}, Eq(true)),
_)
).WillOnce(Invoke([&](auto in __unused, auto &out) {
auto out0 = new mockfs_buf_out;
out0->header.error = -EINTR;
out0->header.unique = write_unique;
out0->header.unique = mkdir_unique;
out0->header.len = sizeof(out0->header);
out.push_back(out0);
}));
fd = open(FULLPATH, O_WRONLY);
ASSERT_LE(0, fd) << strerror(errno);
setup_interruptor(self);
ASSERT_EQ(-1, write(fd, CONTENTS, bufsize));
ASSERT_EQ(-1, mkdir(FULLDIRPATH0, MODE));
EXPECT_EQ(EINTR, errno);
/* Deliberately leak fd. close(2) will be tested in release.cc */
}
/* Reads should also be interruptible */
@ -638,16 +543,11 @@ TEST_F(Interrupt, in_progress_read)
/* FUSE_INTERRUPT operations should take priority over other pending ops */
TEST_F(Interrupt, priority)
{
const char FULLPATH0[] = "mountpoint/some_file.txt";
const char RELPATH0[] = "some_file.txt";
const char FULLPATH1[] = "mountpoint/other_file.txt";
const char RELPATH1[] = "other_file.txt";
const char *CONTENTS = "ijklmnop";
const char FULLPATH1[] = "mountpoint/other_dir";
const char RELPATH1[] = "other_dir";
Sequence seq;
ssize_t bufsize = strlen(CONTENTS);
uint64_t ino0 = 42, ino1 = 43;
int fd0, fd1;
uint64_t write_unique;
uint64_t ino1 = 43;
uint64_t mkdir_unique;
pthread_t self, th0;
sem_t sem0, sem1;
@ -655,21 +555,19 @@ TEST_F(Interrupt, priority)
ASSERT_EQ(0, sem_init(&sem1, 0, 0)) << strerror(errno);
self = pthread_self();
expect_lookup(RELPATH0, ino0);
expect_open(ino0, 0, 1);
expect_lookup(RELPATH1, ino1);
expect_open(ino1, 0, 1);
EXPECT_LOOKUP(1, RELDIRPATH0).WillOnce(Invoke(ReturnErrno(ENOENT)));
EXPECT_LOOKUP(1, RELPATH1).WillOnce(Invoke(ReturnErrno(ENOENT)));
//expect_mkdir(&mkdir_unique);
EXPECT_CALL(*m_mock, process(
ResultOf([=](auto in) {
return (in->header.opcode == FUSE_WRITE &&
in->header.nodeid == ino0);
return (in->header.opcode == FUSE_MKDIR);
}, Eq(true)),
_)
).InSequence(seq)
.WillOnce(Invoke(ReturnImmediate([&](auto in, auto out) {
write_unique = in->header.unique;
mkdir_unique = in->header.unique;
/* Let the next write proceed */
/* Let the next mkdir proceed */
sem_post(&sem1);
/* Pause the daemon thread so it won't read the next op */
@ -677,47 +575,42 @@ TEST_F(Interrupt, priority)
/* Finally, interrupt the original op */
out->header.error = -EINTR;
out->header.unique = write_unique;
out->header.unique = mkdir_unique;
out->header.len = sizeof(out->header);
})));
/*
* FUSE_INTERRUPT should be received before the second FUSE_WRITE, even
* FUSE_INTERRUPT should be received before the second FUSE_MKDIR, even
* though it was generated later
*/
EXPECT_CALL(*m_mock, process(
ResultOf([&](auto in) {
return (in->header.opcode == FUSE_INTERRUPT &&
in->body.interrupt.unique == write_unique);
in->body.interrupt.unique == mkdir_unique);
}, Eq(true)),
_)
).InSequence(seq)
.WillOnce(Invoke(ReturnErrno(EAGAIN)));
EXPECT_CALL(*m_mock, process(
ResultOf([&](auto in) {
return (in->header.opcode == FUSE_WRITE &&
in->header.nodeid == ino1);
return (in->header.opcode == FUSE_MKDIR);
}, Eq(true)),
_)
).InSequence(seq)
.WillOnce(Invoke(ReturnImmediate([=](auto in , auto out) {
SET_OUT_HEADER_LEN(out, write);
out->body.write.size = in->body.write.size;
.WillOnce(Invoke(ReturnImmediate([=](auto in __unused, auto out) {
SET_OUT_HEADER_LEN(out, entry);
out->body.create.entry.attr.mode = S_IFDIR | MODE;
out->body.create.entry.nodeid = ino1;
})));
fd0 = open(FULLPATH0, O_WRONLY);
ASSERT_LE(0, fd0) << strerror(errno);
fd1 = open(FULLPATH1, O_WRONLY);
ASSERT_LE(0, fd1) << strerror(errno);
/* Use a separate thread for the first write */
ASSERT_EQ(0, pthread_create(&th0, NULL, write0, (void*)(intptr_t)fd0))
/* Use a separate thread for the first mkdir */
ASSERT_EQ(0, pthread_create(&th0, NULL, mkdir0, NULL))
<< strerror(errno);
signaled_semaphore = &sem0;
sem_wait(&sem1); /* Sequence the two writes */
sem_wait(&sem1); /* Sequence the two mkdirs */
setup_interruptor(th0);
ASSERT_EQ(bufsize, write(fd1, CONTENTS, bufsize)) << strerror(errno);
ASSERT_EQ(0, mkdir(FULLPATH1, MODE)) << strerror(errno);
/* Wait awhile to make sure the signal generates no FUSE_INTERRUPT */
usleep(250'000);
@ -740,26 +633,19 @@ TEST_F(Interrupt, priority)
/* https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=236530 */
TEST_F(Interrupt, too_soon)
{
const char FULLPATH[] = "mountpoint/some_file.txt";
const char RELPATH[] = "some_file.txt";
const char *CONTENTS = "abcdefgh";
Sequence seq;
uint64_t ino = 42;
int fd;
ssize_t bufsize = strlen(CONTENTS);
pthread_t self;
uint64_t write_unique;
uint64_t mkdir_unique;
self = pthread_self();
expect_lookup(RELPATH, ino);
expect_open(ino, 0, 1);
expect_write(ino, &write_unique);
EXPECT_LOOKUP(1, RELDIRPATH0).WillOnce(Invoke(ReturnErrno(ENOENT)));
expect_mkdir(&mkdir_unique);
EXPECT_CALL(*m_mock, process(
ResultOf([&](auto in) {
return (in->header.opcode == FUSE_INTERRUPT &&
in->body.interrupt.unique == write_unique);
in->body.interrupt.unique == mkdir_unique);
}, Eq(true)),
_)
).InSequence(seq)
@ -768,23 +654,20 @@ TEST_F(Interrupt, too_soon)
EXPECT_CALL(*m_mock, process(
ResultOf([&](auto in) {
return (in->header.opcode == FUSE_INTERRUPT &&
in->body.interrupt.unique == write_unique);
in->body.interrupt.unique == mkdir_unique);
}, Eq(true)),
_)
).InSequence(seq)
.WillOnce(Invoke([&](auto in __unused, auto &out __unused) {
auto out0 = new mockfs_buf_out;
out0->header.error = -EINTR;
out0->header.unique = write_unique;
out0->header.unique = mkdir_unique;
out0->header.len = sizeof(out0->header);
out.push_back(out0);
}));
fd = open(FULLPATH, O_WRONLY);
ASSERT_LE(0, fd) << strerror(errno);
setup_interruptor(self);
ASSERT_EQ(-1, write(fd, CONTENTS, bufsize));
ASSERT_EQ(-1, mkdir(FULLDIRPATH0, MODE));
EXPECT_EQ(EINTR, errno);
/* Deliberately leak fd. close(2) will be tested in release.cc */