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[PATCH v4 2/2] error handling: Use RETRY_ON_EINTR() macro where applicab
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From: |
Nikita Ivanov |
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Subject: |
[PATCH v4 2/2] error handling: Use RETRY_ON_EINTR() macro where applicable |
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Date: |
Sun, 23 Oct 2022 12:04:22 +0300 |
There is a defined RETRY_ON_EINTR() macro in qemu/osdep.h
which handles the same while loop.
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/415
Signed-off-by: Nikita Ivanov <nivanov@cloudlinux.com>
---
block/file-posix.c | 37 ++++++++++++++++---------------------
chardev/char-pty.c | 4 +---
hw/9pfs/9p-local.c | 8 ++------
net/l2tpv3.c | 17 +++++------------
net/socket.c | 16 +++++++---------
net/tap.c | 8 ++------
qga/commands-posix.c | 4 +---
semihosting/syscalls.c | 4 +---
tests/qtest/libqtest.c | 12 +++++-------
tests/vhost-user-bridge.c | 4 +---
util/main-loop.c | 4 +---
util/osdep.c | 4 +---
util/vfio-helpers.c | 12 ++++++------
13 files changed, 49 insertions(+), 85 deletions(-)
diff --git a/block/file-posix.c b/block/file-posix.c
index 23acffb9a4..8f7a22e3e4 100644
--- a/block/file-posix.c
+++ b/block/file-posix.c
@@ -1229,9 +1229,7 @@ static int hdev_get_max_segments(int fd, struct stat *st)
ret = -errno;
goto out;
}
- do {
- ret = read(sysfd, buf, sizeof(buf) - 1);
- } while (ret == -1 && errno == EINTR);
+ ret = RETRY_ON_EINTR(read(sysfd, buf, sizeof(buf) - 1));
if (ret < 0) {
ret = -errno;
goto out;
@@ -1379,9 +1377,9 @@ static int handle_aiocb_ioctl(void *opaque)
RawPosixAIOData *aiocb = opaque;
int ret;
- do {
- ret = ioctl(aiocb->aio_fildes, aiocb->ioctl.cmd, aiocb->ioctl.buf);
- } while (ret == -1 && errno == EINTR);
+ ret = RETRY_ON_EINTR(
+ ioctl(aiocb->aio_fildes, aiocb->ioctl.cmd, aiocb->ioctl.buf)
+ );
if (ret == -1) {
return -errno;
}
@@ -1463,18 +1461,17 @@ static ssize_t handle_aiocb_rw_vector(RawPosixAIOData
*aiocb)
{
ssize_t len;
- do {
- if (aiocb->aio_type & QEMU_AIO_WRITE)
- len = qemu_pwritev(aiocb->aio_fildes,
- aiocb->io.iov,
- aiocb->io.niov,
- aiocb->aio_offset);
- else
- len = qemu_preadv(aiocb->aio_fildes,
- aiocb->io.iov,
- aiocb->io.niov,
- aiocb->aio_offset);
- } while (len == -1 && errno == EINTR);
+ len = RETRY_ON_EINTR(
+ (aiocb->aio_type & QEMU_AIO_WRITE) ?
+ qemu_pwritev(aiocb->aio_fildes,
+ aiocb->io.iov,
+ aiocb->io.niov,
+ aiocb->aio_offset) :
+ qemu_preadv(aiocb->aio_fildes,
+ aiocb->io.iov,
+ aiocb->io.niov,
+ aiocb->aio_offset)
+ );
if (len == -1) {
return -errno;
@@ -1899,9 +1896,7 @@ static int allocate_first_block(int fd, size_t max_size)
buf = qemu_memalign(max_align, write_size);
memset(buf, 0, write_size);
- do {
- n = pwrite(fd, buf, write_size, 0);
- } while (n == -1 && errno == EINTR);
+ n = RETRY_ON_EINTR(pwrite(fd, buf, write_size, 0));
ret = (n == -1) ? -errno : 0;
diff --git a/chardev/char-pty.c b/chardev/char-pty.c
index 53f25c6bbd..92fd33c854 100644
--- a/chardev/char-pty.c
+++ b/chardev/char-pty.c
@@ -93,9 +93,7 @@ static void pty_chr_update_read_handler(Chardev *chr)
pfd.fd = fioc->fd;
pfd.events = G_IO_OUT;
pfd.revents = 0;
- do {
- rc = g_poll(&pfd, 1, 0);
- } while (rc == -1 && errno == EINTR);
+ rc = RETRY_ON_EINTR(g_poll(&pfd, 1, 0));
assert(rc >= 0);
if (pfd.revents & G_IO_HUP) {
diff --git a/hw/9pfs/9p-local.c b/hw/9pfs/9p-local.c
index d42ce6d8b8..bb3187244f 100644
--- a/hw/9pfs/9p-local.c
+++ b/hw/9pfs/9p-local.c
@@ -470,9 +470,7 @@ static ssize_t local_readlink(FsContext *fs_ctx, V9fsPath
*fs_path,
if (fd == -1) {
return -1;
}
- do {
- tsize = read(fd, (void *)buf, bufsz);
- } while (tsize == -1 && errno == EINTR);
+ tsize = RETRY_ON_EINTR(read(fd, (void *)buf, bufsz));
close_preserve_errno(fd);
} else if ((fs_ctx->export_flags & V9FS_SM_PASSTHROUGH) ||
(fs_ctx->export_flags & V9FS_SM_NONE)) {
@@ -908,9 +906,7 @@ static int local_symlink(FsContext *fs_ctx, const char
*oldpath,
}
/* Write the oldpath (target) to the file. */
oldpath_size = strlen(oldpath);
- do {
- write_size = write(fd, (void *)oldpath, oldpath_size);
- } while (write_size == -1 && errno == EINTR);
+ write_size = RETRY_ON_EINTR(write(fd, (void *)oldpath, oldpath_size));
close_preserve_errno(fd);
if (write_size != oldpath_size) {
diff --git a/net/l2tpv3.c b/net/l2tpv3.c
index af373e5c30..e0726f5f89 100644
--- a/net/l2tpv3.c
+++ b/net/l2tpv3.c
@@ -240,9 +240,7 @@ static ssize_t net_l2tpv3_receive_dgram_iov(NetClientState
*nc,
message.msg_control = NULL;
message.msg_controllen = 0;
message.msg_flags = 0;
- do {
- ret = sendmsg(s->fd, &message, 0);
- } while ((ret == -1) && (errno == EINTR));
+ ret = RETRY_ON_EINTR(sendmsg(s->fd, &message, 0));
if (ret > 0) {
ret -= s->offset;
} else if (ret == 0) {
@@ -285,9 +283,7 @@ static ssize_t net_l2tpv3_receive_dgram(NetClientState *nc,
message.msg_control = NULL;
message.msg_controllen = 0;
message.msg_flags = 0;
- do {
- ret = sendmsg(s->fd, &message, 0);
- } while ((ret == -1) && (errno == EINTR));
+ ret = RETRY_ON_EINTR(sendmsg(s->fd, &message, 0));
if (ret > 0) {
ret -= s->offset;
} else if (ret == 0) {
@@ -434,12 +430,9 @@ static void net_l2tpv3_send(void *opaque)
msgvec = s->msgvec + s->queue_head;
if (target_count > 0) {
- do {
- count = recvmmsg(
- s->fd,
- msgvec,
- target_count, MSG_DONTWAIT, NULL);
- } while ((count == -1) && (errno == EINTR));
+ count = RETRY_ON_EINTR(
+ recvmmsg(s->fd, msgvec, target_count, MSG_DONTWAIT, NULL)
+ );
if (count < 0) {
/* Recv error - we still need to flush packets here,
* (re)set queue head to current position
diff --git a/net/socket.c b/net/socket.c
index bfd8596250..00f8a88531 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -117,15 +117,13 @@ static ssize_t net_socket_receive_dgram(NetClientState
*nc, const uint8_t *buf,
NetSocketState *s = DO_UPCAST(NetSocketState, nc, nc);
ssize_t ret;
- do {
- if (s->dgram_dst.sin_family != AF_UNIX) {
- ret = sendto(s->fd, buf, size, 0,
- (struct sockaddr *)&s->dgram_dst,
- sizeof(s->dgram_dst));
- } else {
- ret = send(s->fd, buf, size, 0);
- }
- } while (ret == -1 && errno == EINTR);
+ ret = RETRY_ON_EINTR(
+ s->dgram_dst.sin_family != AF_UNIX ?
+ sendto(s->fd, buf, size, 0,
+ (struct sockaddr *)&s->dgram_dst,
+ sizeof(s->dgram_dst)) :
+ send(s->fd, buf, size, 0)
+ );
if (ret == -1 && errno == EAGAIN) {
net_socket_write_poll(s, true);
diff --git a/net/tap.c b/net/tap.c
index e090d14203..4c90f70b7e 100644
--- a/net/tap.c
+++ b/net/tap.c
@@ -102,9 +102,7 @@ static ssize_t tap_write_packet(TAPState *s, const struct
iovec *iov, int iovcnt
{
ssize_t len;
- do {
- len = writev(s->fd, iov, iovcnt);
- } while (len == -1 && errno == EINTR);
+ len = RETRY_ON_EINTR(writev(s->fd, iov, iovcnt));
if (len == -1 && errno == EAGAIN) {
tap_write_poll(s, true);
@@ -577,9 +575,7 @@ static int net_bridge_run_helper(const char *helper, const
char *bridge,
close(sv[1]);
- do {
- fd = recv_fd(sv[0]);
- } while (fd == -1 && errno == EINTR);
+ fd = RETRY_ON_EINTR(recv_fd(sv[0]));
saved_errno = errno;
close(sv[0]);
diff --git a/qga/commands-posix.c b/qga/commands-posix.c
index eea819cff0..95753f7c96 100644
--- a/qga/commands-posix.c
+++ b/qga/commands-posix.c
@@ -68,9 +68,7 @@ static void ga_wait_child(pid_t pid, int *status, Error
**errp)
*status = 0;
- do {
- rpid = waitpid(pid, status, 0);
- } while (rpid == -1 && errno == EINTR);
+ rpid = RETRY_ON_EINTR(waitpid(pid, status, 0));
if (rpid == -1) {
error_setg_errno(errp, errno, "failed to wait for child (pid: %d)",
diff --git a/semihosting/syscalls.c b/semihosting/syscalls.c
index 508a0ad88c..5893c760c5 100644
--- a/semihosting/syscalls.c
+++ b/semihosting/syscalls.c
@@ -317,9 +317,7 @@ static void host_read(CPUState *cs, gdb_syscall_complete_cb
complete,
complete(cs, -1, EFAULT);
return;
}
- do {
- ret = read(gf->hostfd, ptr, len);
- } while (ret == -1 && errno == EINTR);
+ ret = RETRY_ON_EINTR(read(gf->hostfd, ptr, len));
if (ret == -1) {
complete(cs, -1, errno);
unlock_user(ptr, buf, 0);
diff --git a/tests/qtest/libqtest.c b/tests/qtest/libqtest.c
index 90648eb8d1..5abb29cb9e 100644
--- a/tests/qtest/libqtest.c
+++ b/tests/qtest/libqtest.c
@@ -101,10 +101,10 @@ static int socket_accept(int sock)
return -1;
}
- do {
- addrlen = sizeof(addr);
- ret = accept(sock, (struct sockaddr *)&addr, &addrlen);
- } while (ret == -1 && errno == EINTR);
+ ret = RETRY_ON_EINTR((
+ addrlen = sizeof(addr),
+ accept(sock, (struct sockaddr *)&addr, &addrlen)
+ ));
if (ret == -1) {
fprintf(stderr, "%s failed: %s\n", __func__, strerror(errno));
}
@@ -574,9 +574,7 @@ int qtest_socket_server(const char *socket_path)
addr.sun_family = AF_UNIX;
snprintf(addr.sun_path, sizeof(addr.sun_path), "%s", socket_path);
- do {
- ret = bind(sock, (struct sockaddr *)&addr, sizeof(addr));
- } while (ret == -1 && errno == EINTR);
+ ret = RETRY_ON_EINTR(bind(sock, (struct sockaddr *)&addr, sizeof(addr)));
g_assert_cmpint(ret, !=, -1);
ret = listen(sock, 1);
g_assert_cmpint(ret, !=, -1);
diff --git a/tests/vhost-user-bridge.c b/tests/vhost-user-bridge.c
index fecdf915e7..a5c711b1de 100644
--- a/tests/vhost-user-bridge.c
+++ b/tests/vhost-user-bridge.c
@@ -331,9 +331,7 @@ vubr_backend_recv_cb(int sock, void *ctx)
.msg_iovlen = num,
.msg_flags = MSG_DONTWAIT,
};
- do {
- ret = recvmsg(vubr->backend_udp_sock, &msg, 0);
- } while (ret == -1 && (errno == EINTR));
+ ret = RETRY_ON_EINTR(recvmsg(vubr->backend_udp_sock, &msg, 0));
if (i == 0) {
iov_restore_front(elem->in_sg, sg, hdrlen);
diff --git a/util/main-loop.c b/util/main-loop.c
index f00a25451b..63bd5d123d 100644
--- a/util/main-loop.c
+++ b/util/main-loop.c
@@ -64,9 +64,7 @@ static void sigfd_handler(void *opaque)
ssize_t len;
while (1) {
- do {
- len = read(fd, &info, sizeof(info));
- } while (len == -1 && errno == EINTR);
+ len = RETRY_ON_EINTR(read(fd, &info, sizeof(info)));
if (len == -1 && errno == EAGAIN) {
break;
diff --git a/util/osdep.c b/util/osdep.c
index 746d5f7d71..aa358bd65e 100644
--- a/util/osdep.c
+++ b/util/osdep.c
@@ -244,9 +244,7 @@ static int qemu_lock_fcntl(int fd, int64_t start, int64_t
len, int fl_type)
.l_type = fl_type,
};
qemu_probe_lock_ops();
- do {
- ret = fcntl(fd, fcntl_op_setlk, &fl);
- } while (ret == -1 && errno == EINTR);
+ ret = RETRY_ON_EINTR(fcntl(fd, fcntl_op_setlk, &fl));
return ret == -1 ? -errno : 0;
}
diff --git a/util/vfio-helpers.c b/util/vfio-helpers.c
index 5ba01177bf..1a9b338cf9 100644
--- a/util/vfio-helpers.c
+++ b/util/vfio-helpers.c
@@ -240,9 +240,9 @@ static int qemu_vfio_pci_read_config(QEMUVFIOState *s, void
*buf,
s->config_region_info.offset,
s->config_region_info.size);
assert(QEMU_IS_ALIGNED(s->config_region_info.offset + ofs, size));
- do {
- ret = pread(s->device, buf, size, s->config_region_info.offset + ofs);
- } while (ret == -1 && errno == EINTR);
+ ret = RETRY_ON_EINTR(
+ pread(s->device, buf, size, s->config_region_info.offset + ofs)
+ );
return ret == size ? 0 : -errno;
}
@@ -254,9 +254,9 @@ static int qemu_vfio_pci_write_config(QEMUVFIOState *s,
void *buf, int size, int
s->config_region_info.offset,
s->config_region_info.size);
assert(QEMU_IS_ALIGNED(s->config_region_info.offset + ofs, size));
- do {
- ret = pwrite(s->device, buf, size, s->config_region_info.offset + ofs);
- } while (ret == -1 && errno == EINTR);
+ ret = RETRY_ON_EINTR(
+ pwrite(s->device, buf, size, s->config_region_info.offset + ofs)
+ );
return ret == size ? 0 : -errno;
}
--
2.37.3