From: Harald Hoyer <harald@xxxxxxxxxx>
based on code by Jim Garlick.
---
extras/path_id/path_id.c | 64 +++++++++++++++++++++++++++++++++++++++++++++-
1 files changed, 63 insertions(+), 1 deletions(-)
diff --git a/extras/path_id/path_id.c b/extras/path_id/path_id.c
index dcee378..c3d241b 100644
--- a/extras/path_id/path_id.c
+++ b/extras/path_id/path_id.c
@@ -121,7 +121,69 @@ out:
static struct udev_device *handle_scsi_sas(struct udev_device *parent, char **path)
{
- return NULL;
+ struct udev *udev = udev_device_get_udev(parent);
+ struct udev_device *end_dev;
+ struct udev_device *sasdev;
+ struct udev_device *phydev;
+ struct udev_device *parent_dev;
+ struct udev_device *child_dev;
+ char syspath[UTIL_PATH_SIZE], *base;
+ char phy_path[UTIL_PATH_SIZE];
+ const char *end_name, *name, *enc, *bay;
+ const char *port_path;
+ int scsi_host;
+ int num_phys = 8;
+ int i;
+
+ parent_dev = parent;
+ while (1) {
+ child_dev = parent_dev;
+ parent_dev = udev_device_get_parent(child_dev);
+ if (parent_dev == NULL)
+ return NULL;
+ name = udev_device_get_sysname(parent_dev);
+ if (strstr(name, "end_device-")) {
+ end_dev = parent_dev;
+ end_name = name;
+ } else if (sscanf(name, "host%d", &scsi_host)) {
+ port_path = udev_device_get_syspath(child_dev);
+ break;
+ }
+ }
+
+ base = strdup(udev_device_get_syspath(end_dev));
+ if (!base)
+ return NULL;
+ snprintf(syspath, sizeof(syspath), "%s/sas_device/%s", base, end_name);
+ free(base);
+
+ for (i = 0 ; i < num_phys ; i++) {
+ snprintf(phy_path, sizeof(phy_path), "%s/phy-%d:%d",
+ port_path, scsi_host, i);
+ if (phydev = udev_device_new_from_syspath(udev, phy_path)) {
+ udev_device_unref(phydev);
+ break;
+ }
+ }
+ if (i == num_phys)
+ return NULL;
+
+ sasdev = udev_device_new_from_syspath(udev, syspath);
+ if (sasdev == NULL) {
+ fprintf(stderr, "unable to access '%s'\n", syspath);
+ return NULL;
+ }
+ enc = udev_device_get_sysattr_value(sasdev, "enclosure_identifier");
+ bay = udev_device_get_sysattr_value(sasdev, "bay_identifier");
+ if (bay == NULL) {
+ parent = NULL;
+ goto out;
+ }
+
+ path_prepend(path, "sas-%s-%s-%s", strrchr(phy_path, '/') + 1, enc ? enc : "unknown", bay);
+out:
+ udev_device_unref(sasdev);
+ return parent;
}
static struct udev_device *handle_scsi_iscsi(struct udev_device *parent, char **path)
--
1.7.0.1
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