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From dab127e2324fdfbaf5d595144ccf0d0bfcf73074 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= <marcandre.lureau@redhat.com>
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Date: Sun, 4 Nov 2018 15:45:27 +0000
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Subject: [PATCH 02/35] qga: linux: report disk serial number
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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RH-Author: Marc-André Lureau <marcandre.lureau@redhat.com>
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Message-id: <20181104154528.19241-3-marcandre.lureau@redhat.com>
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Patchwork-id: 82927
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O-Subject: [RHEL8/rhel qemu-kvm PATCH 2/3] qga: linux: report disk serial number
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Bugzilla: 1636185
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RH-Acked-by: Laurent Vivier <lvivier@redhat.com>
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RH-Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
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RH-Acked-by: Markus Armbruster <armbru@redhat.com>
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From: Tomáš Golembiovský <tgolembi@redhat.com>
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Add reporting of disk serial number on Linux guests. The feature depends
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on libudev.
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Example:
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    {
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      "name": "dm-2",
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      "mountpoint": "/",
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      ...
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      "disk": [
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        {
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          "serial": "SAMSUNG_MZ7LN512HCHP-000L1_S1ZKNXAG822493",
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          ...
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        }
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      ],
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    }
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Signed-off-by: Tomáš Golembiovský <tgolembi@redhat.com>
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Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
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BZ: https://bugzilla.redhat.com/show_bug.cgi?id=1636185
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(cherry picked from commit b616105a904bc350a409e12c39af0ae210900124)
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Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
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Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>
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---
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 qga/Makefile.objs    |  1 +
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 qga/commands-posix.c | 32 ++++++++++++++++++++++++++++++--
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 qga/qapi-schema.json |  4 +++-
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 3 files changed, 34 insertions(+), 3 deletions(-)
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diff --git a/qga/Makefile.objs b/qga/Makefile.objs
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index ed08c59..80e6bb3 100644
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--- a/qga/Makefile.objs
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+++ b/qga/Makefile.objs
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@@ -1,3 +1,4 @@
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+commands-posix.o-libs := $(LIBUDEV_LIBS)
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 qga-obj-y = commands.o guest-agent-command-state.o main.o
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 qga-obj-$(CONFIG_POSIX) += commands-posix.o channel-posix.o
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 qga-obj-$(CONFIG_WIN32) += commands-win32.o channel-win32.o service-win32.o
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diff --git a/qga/commands-posix.c b/qga/commands-posix.c
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index 0dc219d..c151891 100644
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--- a/qga/commands-posix.c
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+++ b/qga/commands-posix.c
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@@ -47,6 +47,10 @@ extern char **environ;
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 #include <sys/socket.h>
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 #include <net/if.h>
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+#ifdef CONFIG_LIBUDEV
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+#include <libudev.h>
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+#endif
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+
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 #ifdef FIFREEZE
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 #define CONFIG_FSFREEZE
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 #endif
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@@ -871,6 +875,10 @@ static void build_guest_fsinfo_for_real_device(char const *syspath,
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     GuestDiskAddressList *list = NULL;
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     bool has_ata = false, has_host = false, has_tgt = false;
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     char *p, *q, *driver = NULL;
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+#ifdef CONFIG_LIBUDEV
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+    struct udev *udev = NULL;
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+    struct udev_device *udevice = NULL;
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+#endif
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     p = strstr(syspath, "/devices/pci");
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     if (!p || sscanf(p + 12, "%*x:%*x/%x:%x:%x.%x%n",
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@@ -919,6 +927,21 @@ static void build_guest_fsinfo_for_real_device(char const *syspath,
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     list = g_malloc0(sizeof(*list));
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     list->value = disk;
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+#ifdef CONFIG_LIBUDEV
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+    udev = udev_new();
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+    udevice = udev_device_new_from_syspath(udev, syspath);
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+    if (udev == NULL || udevice == NULL) {
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+        g_debug("failed to query udev");
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+    } else {
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+        const char *serial;
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+        serial = udev_device_get_property_value(udevice, "ID_SERIAL");
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+        if (serial != NULL && *serial != 0) {
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+            disk->serial = g_strdup(serial);
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+            disk->has_serial = true;
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+        }
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+    }
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+#endif
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+
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     if (strcmp(driver, "ata_piix") == 0) {
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         /* a host per ide bus, target*:0:<unit>:0 */
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         if (!has_host || !has_tgt) {
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@@ -978,14 +1001,19 @@ static void build_guest_fsinfo_for_real_device(char const *syspath,
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     list->next = fs->disk;
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     fs->disk = list;
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-    g_free(driver);
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-    return;
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+    goto out;
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 cleanup:
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     if (list) {
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         qapi_free_GuestDiskAddressList(list);
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     }
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+out:
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     g_free(driver);
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+#ifdef CONFIG_LIBUDEV
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+    udev_unref(udev);
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+    udev_device_unref(udevice);
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+#endif
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+    return;
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 }
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 static void build_guest_fsinfo_for_device(char const *devpath,
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diff --git a/qga/qapi-schema.json b/qga/qapi-schema.json
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index 17884c7..426528c 100644
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--- a/qga/qapi-schema.json
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+++ b/qga/qapi-schema.json
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@@ -832,13 +832,15 @@
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 # @bus: bus id
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 # @target: target id
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 # @unit: unit id
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+# @serial: serial number (since: 3.1)
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 #
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 # Since: 2.2
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 ##
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 { 'struct': 'GuestDiskAddress',
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   'data': {'pci-controller': 'GuestPCIAddress',
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            'bus-type': 'GuestDiskBusType',
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-           'bus': 'int', 'target': 'int', 'unit': 'int'} }
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+           'bus': 'int', 'target': 'int', 'unit': 'int',
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+           '*serial': 'str'} }
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 ##
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 # @GuestFilesystemInfo:
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-- 
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1.8.3.1
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