[PATCH] wait_for_sysfs debug cleanup

> Sorry, I left my debug code in.

Oops, just realized it now. You've applied a older version and not the
latest. Here is a new patch to catch up.
This commit is contained in:
kay.sievers@vrfy.org 2004-10-06 23:45:30 -07:00 committed by Greg KH
parent 12901d995f
commit e629ca3f49
2 changed files with 72 additions and 30 deletions

View file

@ -399,7 +399,7 @@ install: install-initscript install-config install-man install-dev.d all
$(INSTALL_PROGRAM) -D $(WAIT) $(DESTDIR)$(sbindir)/$(WAIT)
- ln -f -s $(sbindir)/udev $(DESTDIR)$(sbindir)/$(STARTER)
- ln -f -s $(sbindir)/$(SENDER) $(DESTDIR)$(hotplugdir)/10-udev.hotplug
- ln -f -s $(sbindir)/$(WAIT) $(DESTDIR)$(hotplugdir)/00-wait_for_sysfs.hotplug
- ln -f -s $(sbindir)/$(WAIT) $(DESTDIR)$(hotplugdir)/05-wait_for_sysfs.hotplug
ifndef DESTDIR
- killall udevd
- rm -f $(udevdir)/.udev.tdb
@ -412,7 +412,7 @@ endif
uninstall: uninstall-man uninstall-dev.d
- rm $(hotplugdir)/10-udev.hotplug
- rm $(hotplugdir)/00-wait_for_sysfs.hotplug
- rm $(hotplugdir)/05-wait_for_sysfs.hotplug
- rm $(configdir)/rules.d/50-udev.rules
- rm $(configdir)/permissions.d/50-udev.permissions
- rm $(configdir)/udev.conf

View file

@ -1,7 +1,7 @@
/*
* wait_for_sysfs.c - small program to delay the execution
* of /etc/hotplug.d/ programs, until sysfs
* is populated by the kernel. Depending on
* is fully populated by the kernel. Depending on
* the type of device, we wait for all expected
* directories and then just exit.
*
@ -49,6 +49,7 @@ void log_message(int level, const char *format, ...)
#define WAIT_MAX_SECONDS 5
#define WAIT_LOOP_PER_SECOND 20
/* wait for specific file to show up, normally the "dev"-file */
static int wait_for_class_device_attributes(struct sysfs_class_device *class_dev)
{
static struct class_file {
@ -56,8 +57,10 @@ static int wait_for_class_device_attributes(struct sysfs_class_device *class_dev
char *file;
} class_files[] = {
{ .subsystem = "net", .file = "ifindex" },
{ .subsystem = "scsi_host", .file = "unique_id" },
{ .subsystem = "scsi_device", .file = NULL },
{ .subsystem = "pcmcia_socket", .file = "card_type" },
{ .subsystem = "usb_host", .file = NULL },
{ .subsystem = "pcmcia_socket", .file = NULL },
{ NULL, NULL }
};
struct class_file *classfile;
@ -83,16 +86,17 @@ static int wait_for_class_device_attributes(struct sysfs_class_device *class_dev
dbg("class '%s' specific file '%s' found", class_dev->classname, file);
return 0;
}
usleep(1000 * 1000 / WAIT_LOOP_PER_SECOND);
}
dbg("error: getting bus '%s' specific file '%s'", class_dev->classname, file);
dbg("error: getting class '%s' specific file '%s'", class_dev->classname, file);
return -1;
}
/* skip waiting for physical device */
static int class_device_expect_no_device_link(struct sysfs_class_device *class_dev)
{
char **device;
static char *devices_without_link[] = {
"nb",
"ram",
@ -120,6 +124,7 @@ static int class_device_expect_no_device_link(struct sysfs_class_device *class_d
"ttyS",
NULL
};
char **device;
for (device = devices_without_link; *device != NULL; device++) {
int len = strlen(*device);
@ -140,6 +145,26 @@ static int class_device_expect_no_device_link(struct sysfs_class_device *class_d
return 0;
}
/* skip waiting for the bus */
static int class_device_expect_no_bus(struct sysfs_class_device *class_dev)
{
static char *devices_without_bus[] = {
"scsi_host",
NULL
};
char **device;
for (device = devices_without_bus; *device != NULL; device++) {
int len = strlen(*device);
if (strncmp(class_dev->classname, *device, len) == 0)
return 1;
}
return 0;
}
/* wait for the bus and for a bus specific file to show up */
static int wait_for_bus_device(struct sysfs_device *device_dev)
{
static struct bus_file {
@ -152,6 +177,7 @@ static int wait_for_bus_device(struct sysfs_device *device_dev)
{ .bus = "usb-serial", .file = "detach_state" },
{ .bus = "ide", .file = "detach_state" },
{ .bus = "pci", .file = "vendor" },
{ .bus = "platform", .file = "detach_state" },
{ NULL }
};
struct bus_file *busfile;
@ -174,19 +200,24 @@ static int wait_for_bus_device(struct sysfs_device *device_dev)
/* wait for a bus specific file to show up */
loop = WAIT_MAX_SECONDS * WAIT_LOOP_PER_SECOND;
while (--loop) {
int found = 0;
for (busfile = bus_files; busfile->bus != NULL; busfile++) {
if (strcmp(device_dev->bus, busfile->bus) == 0) {
found = 1;
dbg("looking at bus '%s' for specific file '%s'", device_dev->bus, busfile->file);
if (sysfs_get_device_attr(device_dev, busfile->file) != NULL) {
dbg("bus '%s' specific file '%s' found", device_dev->bus, busfile->file);
return 0;
}
if (busfile->bus == NULL) {
info("error: unknown bus, update the build-in list '%s'", device_dev->bus);
return -1;
}
}
}
if (found == 0) {
info("error: unknown bus, please report to "
"<linux-hotplug-devel@lists.sourceforge.net> '%s'", device_dev->bus);
return -1;
}
usleep(1000 * 1000 / WAIT_LOOP_PER_SECOND);
}
dbg("error: getting bus '%s' specific file '%s'", device_dev->bus, busfile->file);
@ -206,6 +237,8 @@ int main(int argc, char *argv[], char *envp[])
int loop;
int rc = 0;
init_logging("wait_for_sysfs");
if (argc != 2) {
dbg("error: subsystem");
return 1;
@ -224,6 +257,7 @@ int main(int argc, char *argv[], char *envp[])
return 1;
}
/* we only wait on an add event */
if (strcmp(action, "add") != 0)
return 0;
@ -242,20 +276,25 @@ int main(int argc, char *argv[], char *envp[])
class_dev = sysfs_open_class_device_path(filename);
if (class_dev)
break;
usleep(1000 * 1000 / WAIT_LOOP_PER_SECOND);
}
if (class_dev == NULL) {
dbg("error: getting class_device");
rc = 4;
rc = 3;
goto exit;
}
dbg("class_device opened '%s'", filename);
wait_for_class_device_attributes(class_dev);
if (wait_for_class_device_attributes(class_dev) != 0) {
rc = 4;
goto exit_class;
}
/* skip devices without /device-link */
if (class_device_expect_no_device_link(class_dev)) {
dbg("no device symlink expected");
sysfs_close_class_device(class_dev);
goto exit;
dbg("no device symlink expected for '%s', ", class_dev->name);
goto exit_class;
}
/* the symlink may be on the parent device */
@ -279,19 +318,21 @@ int main(int argc, char *argv[], char *envp[])
}
if (device_dev == NULL) {
dbg("error: getting /device-device");
sysfs_close_class_device(class_dev);
rc = 5;
goto exit;
goto exit_class;
}
dbg("device symlink found pointing to '%s'", device_dev->path);
/* wait for the bus value */
if (wait_for_bus_device(device_dev) != 0)
rc = 6;
sysfs_close_class_device(class_dev);
if (class_device_expect_no_bus(class_dev)) {
dbg("no bus device expected for '%s', ", class_dev->classname);
} else {
if (wait_for_bus_device(device_dev) != 0)
rc = 6;
}
/* finished */
goto exit;
exit_class:
sysfs_close_class_device(class_dev);
} else if ((strncmp(devpath, "/devices/", 9) == 0)) {
/* open the path we are called for */
@ -303,32 +344,33 @@ int main(int argc, char *argv[], char *envp[])
device_dev = sysfs_open_device_path(filename);
if (device_dev)
break;
usleep(1000 * 1000 / WAIT_LOOP_PER_SECOND);
}
if (device_dev == NULL) {
dbg("error: getting /device-device");
rc = 4;
rc = 7;
goto exit;
}
dbg("device_device opened '%s'", filename);
/* wait for the bus value */
if (wait_for_bus_device(device_dev) != 0)
rc = 9;
rc = 8;
sysfs_close_device(device_dev);
/* finished */
goto exit;
} else {
dbg("unhandled sysfs path, no need to wait");
}
exit:
if (rc == 0)
info("result: waiting for sysfs successful '%s'", devpath);
dbg("result: waiting for sysfs successful '%s'", devpath);
else
info("result: waiting for sysfs failed '%s'", devpath);
info("error: wait_for_sysfs needs an update to handle the device '%s' "
"properly, please report to <linux-hotplug-devel@lists.sourceforge.net>",
devpath);
return rc;
}