chiark / gitweb /
path_id: update SCSI handling
authorKay Sievers <kay.sievers@vrfy.org>
Sat, 6 Jun 2009 18:30:56 +0000 (20:30 +0200)
committerKay Sievers <kay.sievers@vrfy.org>
Sat, 6 Jun 2009 18:30:56 +0000 (20:30 +0200)
extras/path_id/path_id.c

index 872f0c9..603e108 100644 (file)
@@ -134,35 +134,88 @@ out:
        return number;
 }
 
-static struct udev_device *handle_scsi(struct udev_device *dev, char **path)
+static struct udev_device *handle_fc(struct udev_device *parent, char **path)
+{
+       path_prepend(path, "fc-PATH_ID_NOT_IMPLEMENTED");
+       return parent;
+}
+
+static struct udev_device *handle_sas(struct udev_device *parent, char **path)
+{
+       path_prepend(path, "sas-PATH_ID_NOT_IMPLEMENTED");
+       return parent;
+}
+
+static struct udev_device *handle_iscsi(struct udev_device *parent, char **path)
+{
+       path_prepend(path, "ip-PATH_ID_NOT_IMPLEMENTED");
+       return parent;
+}
+
+static struct udev_device *handle_scsi(struct udev_device *parent, char **path)
 {
-       const char *devtype;
        struct udev_device *hostdev;
-       const char *name;
        int host, bus, target, lun;
+       const char *name;
        int base;
 
-       devtype = udev_device_get_devtype(dev);
-       if (devtype == NULL || strcmp(devtype, "scsi_device") != 0)
-               return dev;
-
-       hostdev = udev_device_get_parent_with_subsystem_devtype(dev, "scsi", "scsi_host");
+       hostdev = udev_device_get_parent_with_subsystem_devtype(parent, "scsi", "scsi_host");
        if (hostdev == NULL)
-               return dev;
+               return parent;
 
-       name = udev_device_get_sysname(dev);
+       name = udev_device_get_sysname(parent);
        if (sscanf(name, "%d:%d:%d:%d", &host, &bus, &target, &lun) != 4)
-               return dev;
+               return parent;
 
        /* rebase host offset to get the local relative number */
        base = base_number(udev_device_get_syspath(hostdev), "host");
        if (base < 0)
-               return dev;
+               return parent;
        host -= base;
 
        path_prepend(path, "scsi-%u:%u:%u:%u", host, bus, target, lun);
-       dev = skip_subsystem(dev, "scsi");
-       return dev;
+       return hostdev;
+}
+
+static struct udev_device *handle_scsi_lun(struct udev_device *parent, char **path)
+{
+       const char *devtype;
+       const char *name;
+       const char *id;
+
+       devtype = udev_device_get_devtype(parent);
+       if (devtype == NULL || strcmp(devtype, "scsi_device") != 0)
+               return parent;
+
+       /* firewire */
+       id = udev_device_get_sysattr_value(parent, "ieee1394_id");
+       if (id != NULL) {
+               path_prepend(path, "ieee1394-0x%s", id);
+               goto out;
+       }
+
+       name = udev_device_get_syspath(parent);
+
+       /* fibre channel */
+       if (strstr(name, "/rport-") != NULL) {
+               parent = handle_fc(parent, path);
+               goto out;
+       }
+
+       /* sas */
+       if (strstr(name, "/end_device-") != NULL) {
+               parent = handle_sas(parent, path);
+               goto out;
+       }
+
+       if (strstr(name, "/session") != NULL) {
+               parent = handle_iscsi(parent, path);
+               goto out;
+       }
+
+       parent = handle_scsi(parent, path);
+out:
+       return parent;
 }
 
 static void handle_scsi_tape(struct udev_device *dev, char **suffix)
@@ -176,41 +229,30 @@ static void handle_scsi_tape(struct udev_device *dev, char **suffix)
                asprintf(suffix, "st%c", name[2]);
 }
 
-static struct udev_device *handle_usb(struct udev_device *dev, char **path)
+static struct udev_device *handle_usb(struct udev_device *parent, char **path)
 {
        const char *devtype;
        const char *str;
        const char *port;
 
-       devtype = udev_device_get_devtype(dev);
+       devtype = udev_device_get_devtype(parent);
        if (devtype == NULL || strcmp(devtype, "usb_interface") != 0)
-               return dev;
+               return parent;
 
-       str = udev_device_get_sysname(dev);
+       str = udev_device_get_sysname(parent);
        port = strchr(str, '-');
        if (port == NULL)
-               return dev;
+               return parent;
        port++;
 
-       dev = skip_subsystem(dev, "usb");
+       parent = skip_subsystem(parent, "usb");
        path_prepend(path, "usb-0:%s", port);
-       return dev;
+       return parent;
 }
 
-static struct udev_device *handle_firewire(struct udev_device *parent, struct udev_device *dev, char **path)
+static struct udev_device *handle_cciss(struct udev_device *parent, char **path)
 {
-       struct udev_device *scsi_dev;
-
-       scsi_dev = udev_device_get_parent_with_subsystem_devtype(dev, "scsi", "scsi_device");
-       if (scsi_dev != NULL) {
-               const char *id;
-
-               id = udev_device_get_sysattr_value(scsi_dev, "ieee1394_id");
-               if (id != NULL)
-                       path_prepend(path, "ieee1394-0x%s", id);
-       }
-
-       parent = skip_subsystem(parent, "firewire");
+       path_prepend(path, "cciss-PATH_ID_NOT_IMPLEMENTED");
        return parent;
 }
 
@@ -303,6 +345,14 @@ int main(int argc, char **argv)
        path = NULL;
        path_suffix = NULL;
 
+       /* S390 ccw bus */
+       parent = udev_device_get_parent_with_subsystem_devtype(dev, "ccw", NULL);
+       if (parent != NULL) {
+               handle_ccw(parent, dev, &path);
+               goto out;
+       }
+
+       /* walk up the chain of devices and compose path */
        parent = dev;
        while (parent != NULL) {
                const char *subsys;
@@ -314,24 +364,14 @@ int main(int argc, char **argv)
                } else if (strcmp(subsys, "scsi_tape") == 0) {
                        handle_scsi_tape(parent, &path_suffix);
                } else if (strcmp(subsys, "scsi") == 0) {
-                       parent = handle_scsi(parent, &path);
-               } else if (strcmp(subsys, "fc_transport") == 0) {
-                       ; //handle_fc();
-               } else if (strcmp(subsys, "sas_end_device") == 0) {
-                       ; //handle_sas();
-               } else if (strcmp(subsys, "iscsi_session") == 0) {
-                       ; //handle_iscsi()
-               } else if (strcmp(subsys, "ccw") == 0) {
-                       handle_ccw(parent, dev, &path);
+                       parent = handle_scsi_lun(parent, &path);
                } else if (strcmp(subsys, "cciss") == 0) {
-                       ; //handle_cciss();
+                       handle_cciss(parent, &path);
                } else if (strcmp(subsys, "usb") == 0) {
                        parent = handle_usb(parent, &path);
                } else if (strcmp(subsys, "serio") == 0) {
                        path_prepend(&path, "serio-%s", udev_device_get_sysnum(parent));
                        parent = skip_subsystem(parent, "serio");
-               } else if (strcmp(subsys, "firewire") == 0 || strcmp(subsys, "ieee1394") == 0) {
-                       parent = handle_firewire(parent, dev, &path);
                } else if (strcmp(subsys, "pci") == 0) {
                        path_prepend(&path, "pci-%s", udev_device_get_sysname(parent));
                        parent = skip_subsystem(parent, "pci");
@@ -345,7 +385,7 @@ int main(int argc, char **argv)
 
                parent = udev_device_get_parent(parent);
        }
-
+out:
        if (path != NULL) {
                if (path_suffix != NULL) {
                        printf("ID_PATH=%s%s\n", path, path_suffix);