X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=udevd.c;h=3c29c2be6e1ef67cefc37f2fe15b9b3913962051;hb=87da5b2c65e0a889093c27189212505328aea4ab;hp=2337493f1ebdf00c37f431b1397f73d8f23fc2b0;hpb=f602ccf0723f116c2c3a77e057a0540027aa38b8;p=elogind.git

diff --git a/udevd.c b/udevd.c
index 2337493f1..3c29c2be6 100644
--- a/udevd.c
+++ b/udevd.c
@@ -38,8 +38,8 @@
 
 #include "list.h"
 #include "udev.h"
-#include "udev_lib.h"
 #include "udev_version.h"
+#include "udev_utils.h"
 #include "udevd.h"
 #include "logging.h"
 
@@ -64,7 +64,6 @@ static void reap_sigchilds(void);
 char *udev_bin;
 
 #ifdef LOG
-unsigned char logname[LOGNAME_SIZE];
 void log_message (int level, const char *format, ...)
 {
 	va_list	args;
@@ -124,6 +123,7 @@ static void msg_queue_insert(struct hotplug_msg *msg)
 /* forks event and removes event from run queue when finished */
 static void udev_run(struct hotplug_msg *msg)
 {
+	char *const argv[] = { "udev", msg->subsystem, NULL };
 	pid_t pid;
 
 	pid = fork();
@@ -132,7 +132,7 @@ static void udev_run(struct hotplug_msg *msg)
 		/* child */
 		close(udevsendsock);
 		logging_close();
-		execle(udev_bin, "udev", msg->subsystem, NULL, msg->envp);
+		execve(udev_bin, argv, msg->envp);
 		dbg("exec of child failed");
 		_exit(1);
 		break;
@@ -150,22 +150,40 @@ static void udev_run(struct hotplug_msg *msg)
 	}
 }
 
-/* returns already running task with devpath */
+/* returns still running task for the same event sequence */
 static struct hotplug_msg *running_with_devpath(struct hotplug_msg *msg)
 {
 	struct hotplug_msg *loop_msg;
+	int i;
+
 	list_for_each_entry(loop_msg, &running_list, list) {
 		if (loop_msg->devpath == NULL || msg->devpath == NULL)
 			continue;
 
-		if (strcmp(loop_msg->devpath, msg->devpath) == 0)
-			return loop_msg;
+		/* is a parent or child device event still running */
+		for (i = 0; i < DEVPATH_SIZE; i++) {
+			if (loop_msg->devpath[i] == '\0' || msg->devpath[i] == '\0')
+				return loop_msg;
+
+			if (loop_msg->devpath[i] != msg->devpath[i])
+				break;
+		}
+
+		/* is the physical device event still running on an add sequence */
+		if (msg->physdevpath && msg->action && strcmp(msg->action, "add") == 0)
+			for (i = 0; i < DEVPATH_SIZE; i++) {
+				if (loop_msg->devpath[i] == '\0' || msg->physdevpath[i] == '\0')
+					return loop_msg;
+
+				if (loop_msg->devpath[i] != msg->physdevpath[i])
+					break;
+			}
 	}
 
 	return NULL;
 }
 
-/* exec queue management routine executes the events and delays events for the same devpath */
+/* exec queue management routine executes the events and serializes events in the same sequence */
 static void exec_queue_manager(void)
 {
 	struct hotplug_msg *loop_msg;
@@ -180,8 +198,8 @@ static void exec_queue_manager(void)
 			udev_run(loop_msg);
 			dbg("moved seq %llu to running list", loop_msg->seqnum);
 		} else {
-			dbg("delay seq %llu, cause seq %llu already working on '%s'",
-				loop_msg->seqnum, msg->seqnum, msg->devpath);
+			dbg("delay seq %llu (%s), cause seq %llu (%s) is still running",
+			    loop_msg->seqnum, loop_msg->devpath, msg->seqnum, msg->devpath);
 		}
 	}
 }
@@ -291,7 +309,7 @@ static void handle_udevsend_msg(int sock)
 	/* copy environment buffer and reconstruct envp */
 	memcpy(msg->envbuf, usend_msg.envbuf, envbuf_size);
 	bufpos = 0;
-	for (i = 0; (bufpos < envbuf_size) && (i < HOTPLUG_NUM_ENVP-1); i++) {
+	for (i = 0; (bufpos < envbuf_size) && (i < HOTPLUG_NUM_ENVP-2); i++) {
 		int keylen;
 		char *key;
 
@@ -313,7 +331,11 @@ static void handle_udevsend_msg(int sock)
 
 		if (strncmp(key, "SEQNUM=", 7) == 0)
 			msg->seqnum = strtoull(&key[7], NULL, 10);
+
+		if (strncmp(key, "PHYSDEVPATH=", 12) == 0)
+			msg->physdevpath = &key[12];
 	}
+	msg->envp[i++] = "UDEVD_EVENT=1";
 	msg->envp[i] = NULL;
 
 	/* if no seqnum is given, we move straight to exec queue */