<div dir="ltr">Merged.<div>Thanks.</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Tue, Aug 16, 2016 at 10:08 PM, Bart Van Assche <span dir="ltr"><<a href="mailto:bart.vanassche@sandisk.com" target="_blank">bart.vanassche@sandisk.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">The behavior we want is as follows:<br>
* If stdout or stderr is closed then SIGPIPE causes termination.<br>
* Sending data to a socket that has been closed by the receiver<br>
does not cause multipathd to stop.<br>
<br>
Hence unblock SIGPIPE and use MSG_NOSIGNAL when sending data over<br>
a socket.<br>
<br>
Signed-off-by: Bart Van Assche <<a href="mailto:bart.vanassche@sandisk.com">bart.vanassche@sandisk.com</a>><br>
Cc: Benjamin Marzinski <<a href="mailto:bmarzins@redhat.com">bmarzins@redhat.com</a>><br>
Cc: Gris Ge <<a href="mailto:fge@redhat.com">fge@redhat.com</a>><br>
---<br>
libmpathcmd/mpath_cmd.c | 4 ++--<br>
libmultipath/uxsock.c | 17 ++---------------<br>
multipathd/main.c | 8 +-------<br>
3 files changed, 5 insertions(+), 24 deletions(-)<br>
<br>
diff --git a/libmpathcmd/mpath_cmd.c b/libmpathcmd/mpath_cmd.c<br>
index c058479..667a2dc 100644<br>
--- a/libmpathcmd/mpath_cmd.c<br>
+++ b/libmpathcmd/mpath_cmd.c<br>
@@ -33,7 +33,7 @@ static ssize_t read_all(int fd, void *buf, size_t len, unsigned int timeout)<br>
return -1;<br>
} else if (!pfd.revents & POLLIN)<br>
continue;<br>
- n = read(fd, buf, len);<br>
+ n = recv(fd, buf, len, 0);<br>
if (n < 0) {<br>
if ((errno == EINTR) || (errno == EAGAIN))<br>
continue;<br>
@@ -56,7 +56,7 @@ static size_t write_all(int fd, const void *buf, size_t len)<br>
size_t total = 0;<br>
<br>
while (len) {<br>
- ssize_t n = write(fd, buf, len);<br>
+ ssize_t n = send(fd, buf, len, MSG_NOSIGNAL);<br>
if (n < 0) {<br>
if ((errno == EINTR) || (errno == EAGAIN))<br>
continue;<br>
diff --git a/libmultipath/uxsock.c b/libmultipath/uxsock.c<br>
index 775e278..880257f 100644<br>
--- a/libmultipath/uxsock.c<br>
+++ b/libmultipath/uxsock.c<br>
@@ -81,7 +81,7 @@ size_t write_all(int fd, const void *buf, size_t len)<br>
size_t total = 0;<br>
<br>
while (len) {<br>
- ssize_t n = write(fd, buf, len);<br>
+ ssize_t n = send(fd, buf, len, MSG_NOSIGNAL);<br>
if (n < 0) {<br>
if ((errno == EINTR) || (errno == EAGAIN))<br>
continue;<br>
@@ -138,20 +138,7 @@ ssize_t read_all(int fd, void *buf, size_t len, unsigned int timeout)<br>
*/<br>
int send_packet(int fd, const char *buf)<br>
{<br>
- int ret = 0;<br>
- sigset_t set, old;<br>
-<br>
- /* Block SIGPIPE */<br>
- sigemptyset(&set);<br>
- sigaddset(&set, SIGPIPE);<br>
- pthread_sigmask(SIG_BLOCK, &set, &old);<br>
-<br>
- ret = mpath_send_cmd(fd, buf);<br>
-<br>
- /* And unblock it again */<br>
- pthread_sigmask(SIG_SETMASK, &old, NULL);<br>
-<br>
- return ret;<br>
+ return mpath_send_cmd(fd, buf);<br>
}<br>
<br>
/*<br>
diff --git a/multipathd/main.c b/multipathd/main.c<br>
index 54abfef..2be6cb2 100644<br>
--- a/multipathd/main.c<br>
+++ b/multipathd/main.c<br>
@@ -2125,18 +2125,12 @@ sigusr2 (int sig)<br>
static void<br>
signal_init(void)<br>
{<br>
- sigset_t set;<br>
-<br>
- sigemptyset(&set);<br>
- sigaddset(&set, SIGPIPE);<br>
- pthread_sigmask(SIG_SETMASK, &set, NULL);<br>
-<br>
signal_set(SIGHUP, sighup);<br>
signal_set(SIGUSR1, sigusr1);<br>
signal_set(SIGUSR2, sigusr2);<br>
signal_set(SIGINT, sigend);<br>
signal_set(SIGTERM, sigend);<br>
- signal(SIGPIPE, SIG_IGN);<br>
+ signal_set(SIGPIPE, sigend);<br>
}<br>
<br>
static void<br>
<span class="HOEnZb"><font color="#888888">--<br>
2.9.2<br>
<br>
<br>
</font></span></blockquote></div><br></div>