From 8b6aa69365ca6e9bbc3bf557a6ccc5ed2b468bec Mon Sep 17 00:00:00 2001 From: Nikita Ivanov Date: Sun, 23 Oct 2022 12:04:21 +0300 Subject: [PATCH] Refactoring: refactor TFR() macro to RETRY_ON_EINTR() MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Rename macro name to more transparent one and refactor it to expression. Signed-off-by: Nikita Ivanov Message-Id: <20221023090422.242617-2-nivanov@cloudlinux.com> Reviewed-by: Marc-André Lureau Reviewed-by: Bin Meng Reviewed-by: Christian Schoenebeck Signed-off-by: Thomas Huth --- chardev/char-fd.c | 2 +- chardev/char-pipe.c | 8 +++++--- include/qemu/osdep.h | 8 +++++++- net/tap-bsd.c | 6 +++--- net/tap-linux.c | 2 +- net/tap-solaris.c | 8 ++++---- net/tap.c | 2 +- os-posix.c | 2 +- tests/qtest/libqtest.c | 2 +- 9 files changed, 24 insertions(+), 16 deletions(-) diff --git a/chardev/char-fd.c b/chardev/char-fd.c index cf78454841..d2c4923359 100644 --- a/chardev/char-fd.c +++ b/chardev/char-fd.c @@ -198,7 +198,7 @@ int qmp_chardev_open_file_source(char *src, int flags, Error **errp) { int fd = -1; - TFR(fd = qemu_open_old(src, flags, 0666)); + fd = RETRY_ON_EINTR(qemu_open_old(src, flags, 0666)); if (fd == -1) { error_setg_file_open(errp, errno, src); } diff --git a/chardev/char-pipe.c b/chardev/char-pipe.c index 66d3b85091..5ad30bcc59 100644 --- a/chardev/char-pipe.c +++ b/chardev/char-pipe.c @@ -131,8 +131,8 @@ static void qemu_chr_open_pipe(Chardev *chr, filename_in = g_strdup_printf("%s.in", filename); filename_out = g_strdup_printf("%s.out", filename); - TFR(fd_in = qemu_open_old(filename_in, O_RDWR | O_BINARY)); - TFR(fd_out = qemu_open_old(filename_out, O_RDWR | O_BINARY)); + fd_in = RETRY_ON_EINTR(qemu_open_old(filename_in, O_RDWR | O_BINARY)); + fd_out = RETRY_ON_EINTR(qemu_open_old(filename_out, O_RDWR | O_BINARY)); g_free(filename_in); g_free(filename_out); if (fd_in < 0 || fd_out < 0) { @@ -142,7 +142,9 @@ static void qemu_chr_open_pipe(Chardev *chr, if (fd_out >= 0) { close(fd_out); } - TFR(fd_in = fd_out = qemu_open_old(filename, O_RDWR | O_BINARY)); + fd_in = fd_out = RETRY_ON_EINTR( + qemu_open_old(filename, O_RDWR | O_BINARY) + ); if (fd_in < 0) { error_setg_file_open(errp, errno, filename); return; diff --git a/include/qemu/osdep.h b/include/qemu/osdep.h index b9c4307779..7d059ad526 100644 --- a/include/qemu/osdep.h +++ b/include/qemu/osdep.h @@ -251,7 +251,13 @@ void QEMU_ERROR("code path is reachable") #define ESHUTDOWN 4099 #endif -#define TFR(expr) do { if ((expr) != -1) break; } while (errno == EINTR) +#define RETRY_ON_EINTR(expr) \ + (__extension__ \ + ({ typeof(expr) __result; \ + do { \ + __result = (expr); \ + } while (__result == -1 && errno == EINTR); \ + __result; })) /* time_t may be either 32 or 64 bits depending on the host OS, and * can be either signed or unsigned, so we can't just hardcode a diff --git a/net/tap-bsd.c b/net/tap-bsd.c index 005ce05c6e..4c98fdd337 100644 --- a/net/tap-bsd.c +++ b/net/tap-bsd.c @@ -56,7 +56,7 @@ int tap_open(char *ifname, int ifname_size, int *vnet_hdr, } else { snprintf(dname, sizeof dname, "/dev/tap%d", i); } - TFR(fd = open(dname, O_RDWR)); + fd = RETRY_ON_EINTR(open(dname, O_RDWR)); if (fd >= 0) { break; } @@ -111,7 +111,7 @@ static int tap_open_clone(char *ifname, int ifname_size, Error **errp) int fd, s, ret; struct ifreq ifr; - TFR(fd = open(PATH_NET_TAP, O_RDWR)); + fd = RETRY_ON_EINTR(open(PATH_NET_TAP, O_RDWR)); if (fd < 0) { error_setg_errno(errp, errno, "could not open %s", PATH_NET_TAP); return -1; @@ -159,7 +159,7 @@ int tap_open(char *ifname, int ifname_size, int *vnet_hdr, if (ifname[0] != '\0') { char dname[100]; snprintf(dname, sizeof dname, "/dev/%s", ifname); - TFR(fd = open(dname, O_RDWR)); + fd = RETRY_ON_EINTR(open(dname, O_RDWR)); if (fd < 0 && errno != ENOENT) { error_setg_errno(errp, errno, "could not open %s", dname); return -1; diff --git a/net/tap-linux.c b/net/tap-linux.c index 304ff45071..f54f308d35 100644 --- a/net/tap-linux.c +++ b/net/tap-linux.c @@ -45,7 +45,7 @@ int tap_open(char *ifname, int ifname_size, int *vnet_hdr, int len = sizeof(struct virtio_net_hdr); unsigned int features; - TFR(fd = open(PATH_NET_TUN, O_RDWR)); + fd = RETRY_ON_EINTR(open(PATH_NET_TUN, O_RDWR)); if (fd < 0) { error_setg_errno(errp, errno, "could not open %s", PATH_NET_TUN); return -1; diff --git a/net/tap-solaris.c b/net/tap-solaris.c index a44f8805c2..38e15028bf 100644 --- a/net/tap-solaris.c +++ b/net/tap-solaris.c @@ -84,13 +84,13 @@ static int tap_alloc(char *dev, size_t dev_size, Error **errp) if( ip_fd ) close(ip_fd); - TFR(ip_fd = open("/dev/udp", O_RDWR, 0)); + ip_fd = RETRY_ON_EINTR(open("/dev/udp", O_RDWR, 0)); if (ip_fd < 0) { error_setg(errp, "Can't open /dev/ip (actually /dev/udp)"); return -1; } - TFR(tap_fd = open("/dev/tap", O_RDWR, 0)); + tap_fd = RETRY_ON_EINTR(open("/dev/tap", O_RDWR, 0)); if (tap_fd < 0) { error_setg(errp, "Can't open /dev/tap"); return -1; @@ -104,7 +104,7 @@ static int tap_alloc(char *dev, size_t dev_size, Error **errp) if ((ppa = ioctl (tap_fd, I_STR, &strioc_ppa)) < 0) error_report("Can't assign new interface"); - TFR(if_fd = open("/dev/tap", O_RDWR, 0)); + if_fd = RETRY_ON_EINTR(open("/dev/tap", O_RDWR, 0)); if (if_fd < 0) { error_setg(errp, "Can't open /dev/tap (2)"); return -1; @@ -137,7 +137,7 @@ static int tap_alloc(char *dev, size_t dev_size, Error **errp) if (ioctl (ip_fd, I_PUSH, "arp") < 0) error_report("Can't push ARP module (3)"); /* Open arp_fd */ - TFR(arp_fd = open ("/dev/tap", O_RDWR, 0)); + arp_fd = RETRY_ON_EINTR(open("/dev/tap", O_RDWR, 0)); if (arp_fd < 0) error_report("Can't open %s", "/dev/tap"); diff --git a/net/tap.c b/net/tap.c index e28ceb078f..bd85c56a04 100644 --- a/net/tap.c +++ b/net/tap.c @@ -650,7 +650,7 @@ static int net_tap_init(const NetdevTapOptions *tap, int *vnet_hdr, vnet_hdr_required = 0; } - TFR(fd = tap_open(ifname, ifname_sz, vnet_hdr, vnet_hdr_required, + fd = RETRY_ON_EINTR(tap_open(ifname, ifname_sz, vnet_hdr, vnet_hdr_required, mq_required, errp)); if (fd < 0) { return -1; diff --git a/os-posix.c b/os-posix.c index 4858650c3e..5adc69f560 100644 --- a/os-posix.c +++ b/os-posix.c @@ -272,7 +272,7 @@ void os_setup_post(void) error_report("not able to chdir to /: %s", strerror(errno)); exit(1); } - TFR(fd = qemu_open_old("/dev/null", O_RDWR)); + fd = RETRY_ON_EINTR(qemu_open_old("/dev/null", O_RDWR)); if (fd == -1) { exit(1); } diff --git a/tests/qtest/libqtest.c b/tests/qtest/libqtest.c index 2fbc3b88f3..f9c8987678 100644 --- a/tests/qtest/libqtest.c +++ b/tests/qtest/libqtest.c @@ -203,7 +203,7 @@ void qtest_wait_qemu(QTestState *s) #ifndef _WIN32 pid_t pid; - TFR(pid = waitpid(s->qemu_pid, &s->wstatus, 0)); + pid = RETRY_ON_EINTR(waitpid(s->qemu_pid, &s->wstatus, 0)); assert(pid == s->qemu_pid); #else DWORD ret;