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authorLennart Poettering <lennart@poettering.net>2015-09-09 08:05:53 +0200
committerLennart Poettering <lennart@poettering.net>2015-09-09 08:05:53 +0200
commit7aa5f9b61bf4ed1c379147a690eaac083fb6dae2 (patch)
treed07679446ea21fa088ef9fa95213ad80bee26459 /src
parent977dce7e5e37574e8c94d0f884f27776b9468774 (diff)
parentba86822db70d9ffd02ad78cd02b237ff8c569c7a (diff)
Merge pull request #1206 from davidmilburn/ata-by-path
udev: build by-path identifiers for ATA devices.
Diffstat (limited to 'src')
-rw-r--r--src/udev/udev-builtin-path_id.c46
1 files changed, 34 insertions, 12 deletions
diff --git a/src/udev/udev-builtin-path_id.c b/src/udev/udev-builtin-path_id.c
index f529ffcf25..01e2c659ae 100644
--- a/src/udev/udev-builtin-path_id.c
+++ b/src/udev/udev-builtin-path_id.c
@@ -317,6 +317,39 @@ out:
return parent;
}
+static struct udev_device *handle_scsi_ata(struct udev_device *parent, char **path) {
+ struct udev *udev = udev_device_get_udev(parent);
+ struct udev_device *targetdev;
+ struct udev_device *target_parent;
+ struct udev_device *atadev;
+ const char *port_no;
+
+ assert(parent);
+ assert(path);
+
+ targetdev = udev_device_get_parent_with_subsystem_devtype(parent, "scsi", "scsi_host");
+ if (!targetdev)
+ return NULL;
+
+ target_parent = udev_device_get_parent(targetdev);
+ if (!target_parent)
+ return NULL;
+
+ atadev = udev_device_new_from_subsystem_sysname(udev, "ata_port", udev_device_get_sysname(target_parent));
+ if (!atadev)
+ return NULL;
+
+ port_no = udev_device_get_sysattr_value(atadev, "port_no");
+ if (!port_no) {
+ parent = NULL;
+ goto out;
+ }
+ path_prepend(path, "ata-%s", port_no);
+out:
+ udev_device_unref(atadev);
+ return parent;
+}
+
static struct udev_device *handle_scsi_default(struct udev_device *parent, char **path) {
struct udev_device *hostdev;
int host, bus, target, lun;
@@ -482,19 +515,8 @@ static struct udev_device *handle_scsi(struct udev_device *parent, char **path,
goto out;
}
- /*
- * We do not support the ATA transport class, it uses global counters
- * to name the ata devices which numbers spread across multiple
- * controllers.
- *
- * The real link numbers are not exported. Also, possible chains of ports
- * behind port multipliers cannot be composed that way.
- *
- * Until all that is solved at the kernel level, there are no by-path/
- * links for ATA devices.
- */
if (strstr(name, "/ata") != NULL) {
- parent = NULL;
+ parent = handle_scsi_ata(parent, path);
goto out;
}