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From 956212c9a226d9192e4b3c085e917fe59f6d5cb9 Mon Sep 17 00:00:00 2001
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From: Maurizio Lombardi <mlombard@redhat.com>
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Date: Tue, 2 Jun 2015 17:26:25 +0200
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Subject: [PATCH] udev: also create old sas paths
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RHEL-only
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Resolves: #957112
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---
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 rules/60-persistent-storage.rules |  2 ++
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 src/udev/udev-builtin-path_id.c   | 33 ++++++++++++++++++++++++++-------
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 2 files changed, 28 insertions(+), 7 deletions(-)
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diff --git a/rules/60-persistent-storage.rules b/rules/60-persistent-storage.rules
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index 25b44a5..71ab974 100644
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--- a/rules/60-persistent-storage.rules
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+++ b/rules/60-persistent-storage.rules
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@@ -54,7 +54,9 @@ KERNEL=="mspblk[0-9]p[0-9]", ENV{ID_NAME}=="?*", ENV{ID_SERIAL}=="?*", SYMLINK+=
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 # by-path (parent device path)
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 ENV{DEVTYPE}=="disk", DEVPATH!="*/virtual/*", IMPORT{builtin}="path_id"
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 ENV{DEVTYPE}=="disk", ENV{ID_PATH}=="?*", SYMLINK+="disk/by-path/$env{ID_PATH}"
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+ENV{DEVTYPE}=="disk", ENV{ID_SAS_PATH}=="?*", SYMLINK+="disk/by-path/$env{ID_SAS_PATH}"
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 ENV{DEVTYPE}=="partition", ENV{ID_PATH}=="?*", SYMLINK+="disk/by-path/$env{ID_PATH}-part%n"
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+ENV{DEVTYPE}=="partition", ENV{ID_SAS_PATH}=="?*", SYMLINK+="disk/by-path/$env{ID_SAS_PATH}-part%n"
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 # skip unpartitioned removable media devices from drivers which do not send "change" events
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 ENV{DEVTYPE}=="disk", KERNEL!="sd*|sr*", ATTR{removable}=="1", GOTO="persistent_storage_end"
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diff --git a/src/udev/udev-builtin-path_id.c b/src/udev/udev-builtin-path_id.c
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index bb0a624..025392d 100644
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--- a/src/udev/udev-builtin-path_id.c
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+++ b/src/udev/udev-builtin-path_id.c
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@@ -154,7 +154,7 @@ out:
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         return parent;
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 }
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-static struct udev_device *handle_scsi_sas(struct udev_device *parent, char **path)
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+static struct udev_device *handle_scsi_sas(struct udev_device *parent, bool enable_new_sas_path, char **path, bool *new_sas_path)
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 {
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         struct udev *udev  = udev_device_get_udev(parent);
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         struct udev_device *targetdev;
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@@ -169,6 +169,8 @@ static struct udev_device *handle_scsi_sas(struct udev_device *parent, char **pa
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         const char *phy_count;
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         char *lun = NULL;
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+        *new_sas_path = false;
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+
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         targetdev = udev_device_get_parent_with_subsystem_devtype(parent, "scsi", "scsi_target");
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         if (targetdev == NULL)
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                 return NULL;
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@@ -201,7 +203,7 @@ static struct udev_device *handle_scsi_sas(struct udev_device *parent, char **pa
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         }
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         /* Check if we are simple disk */
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-        if (strncmp(phy_count, "1", 2) != 0) {
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+        if (strncmp(phy_count, "1", 2) != 0 || !enable_new_sas_path) {
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                  parent = handle_scsi_sas_wide_port(parent, path);
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                  goto out;
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         }
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@@ -241,6 +243,8 @@ static struct udev_device *handle_scsi_sas(struct udev_device *parent, char **pa
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         if (lun)
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                 free(lun);
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+
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+        *new_sas_path = true;
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 out:
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         udev_device_unref(target_sasdev);
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         udev_device_unref(expander_sasdev);
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@@ -466,7 +470,7 @@ out:
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         return hostdev;
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 }
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-static struct udev_device *handle_scsi(struct udev_device *parent, char **path, bool *supported_parent) {
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+static struct udev_device *handle_scsi(struct udev_device *parent, bool enable_new_sas_path, char **path, bool *supported_parent, bool *new_sas_path) {
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         const char *devtype;
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         const char *name;
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         const char *id;
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@@ -494,7 +498,7 @@ static struct udev_device *handle_scsi(struct udev_device *parent, char **path,
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         }
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         if (strstr(name, "/end_device-") != NULL) {
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-                parent = handle_scsi_sas(parent, path);
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+                parent = handle_scsi_sas(parent, enable_new_sas_path, path, new_sas_path);
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                 *supported_parent = true;
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                 goto out;
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         }
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@@ -610,6 +614,8 @@ static int builtin_path_id(struct udev_device *dev, int argc, char *argv[], bool
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         char *path = NULL;
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         bool supported_transport = false;
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         bool supported_parent = false;
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+        bool new_sas_path = false;
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+        bool enable_new_sas_path = true;
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         /* S390 ccw bus */
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         parent = udev_device_get_parent_with_subsystem_devtype(dev, "ccw", NULL);
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@@ -618,6 +624,8 @@ static int builtin_path_id(struct udev_device *dev, int argc, char *argv[], bool
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                 goto out;
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         }
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+restart:
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+        ;
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         /* walk up the chain of devices and compose path */
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         parent = dev;
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         while (parent != NULL) {
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@@ -629,7 +637,7 @@ static int builtin_path_id(struct udev_device *dev, int argc, char *argv[], bool
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                 } else if (streq(subsys, "scsi_tape")) {
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                         handle_scsi_tape(parent, &path);
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                 } else if (streq(subsys, "scsi")) {
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-                        parent = handle_scsi(parent, &path, &supported_parent);
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+                        parent = handle_scsi(parent, enable_new_sas_path, &path, &supported_parent, &new_sas_path);
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                         supported_transport = true;
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                 } else if (streq(subsys, "cciss")) {
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                         parent = handle_cciss(parent, &path);
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@@ -721,9 +729,20 @@ out:
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                         i--;
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                 tag[i] = '\0';
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-                udev_builtin_add_property(dev, test, "ID_PATH", path);
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-                udev_builtin_add_property(dev, test, "ID_PATH_TAG", tag);
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+                if (new_sas_path) {
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+                        udev_builtin_add_property(dev, test, "ID_SAS_PATH", path);
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+                } else {
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+                        udev_builtin_add_property(dev, test, "ID_PATH", path);
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+                        udev_builtin_add_property(dev, test, "ID_PATH_TAG", tag);
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+                }
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+
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                 free(path);
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+
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+                if (new_sas_path) {
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+                        enable_new_sas_path = false;
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+                        goto restart;
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+                }
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+
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                 return EXIT_SUCCESS;
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         }
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         return EXIT_FAILURE;