[Qemu-devel] [PATCH v5.2 0/2] qga: report the usage of fs in guests

[Qemu-devel] [PATCH v5.2 0/2] qga: report the usage of fs in guests

[Chen Hanxiao]

This series report the usage of guest's fs
by "used_bytes" and "total_bytes" in guest-get-fsinfo.

Chen Hanxiao (2):
  qga: add mountpoint usage info to GuestFilesystemInfo
  qga-win: add driver path usage to GuestFilesystemInfo

 qga/commands-posix.c | 15 +++++++++++++++
 qga/commands-win32.c | 12 ++++++++++++
 qga/qapi-schema.json |  3 +++
 3 files changed, 30 insertions(+)

-- 
2.17.1

[Qemu-devel] [PATCH v5.2 1/2] qga: add mountpoint usage info to GuestFilesystemInfo

[Chen Hanxiao]

From: Chen Hanxiao <chenhanxiao@gmail.com>

This patch adds support for getting the usage of mounted
filesystem.
The usage of fs stored as used_bytes and total_bytes.
It's very useful when we try to monitor guest's filesystem.

Cc: Michael Roth <mdroth@linux.vnet.ibm.com>
Cc: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Chen Hanxiao <chenhanxiao@gmail.com>
---
v2:
   add description in qapi-schema and version numbers
v3:
   use float for usage to get more precision.
v4:
   make usage a best-effort query and mark it as optional.
v5:
   report used-bytes and total-bytes in usage
v5.1:
   unpack usage as used-bytes and total-bytes
v5.2:
   remove useless assigments and fix doc

 qga/commands-posix.c | 15 +++++++++++++++
 qga/qapi-schema.json |  3 +++
 2 files changed, 18 insertions(+)

diff --git a/qga/commands-posix.c b/qga/commands-posix.c
index eae817191b..e0e7993bcf 100644
--- a/qga/commands-posix.c
+++ b/qga/commands-posix.c
@@ -46,6 +46,7 @@ extern char **environ;
 #include <arpa/inet.h>
 #include <sys/socket.h>
 #include <net/if.h>
+#include <sys/statvfs.h>
 
 #ifdef FIFREEZE
 #define CONFIG_FSFREEZE
@@ -1072,6 +1073,8 @@ static GuestFilesystemInfo *build_guest_fsinfo(struct FsMount *mount,
                                                Error **errp)
 {
     GuestFilesystemInfo *fs = g_malloc0(sizeof(*fs));
+    struct statvfs buf;
+    unsigned long used, nonroot_total, fr_size;
     char *devpath = g_strdup_printf("/sys/dev/block/%u:%u",
                                     mount->devmajor, mount->devminor);
 
@@ -1079,7 +1082,19 @@ static GuestFilesystemInfo *build_guest_fsinfo(struct FsMount *mount,
     fs->type = g_strdup(mount->devtype);
     build_guest_fsinfo_for_device(devpath, fs, errp);
 
+    if (statvfs(fs->mountpoint, &buf) == 0) {
+        fr_size = buf.f_frsize;
+        used = buf.f_blocks - buf.f_bfree;
+        nonroot_total = used + buf.f_bavail;
+        fs->used_bytes = used * fr_size;
+        fs->total_bytes = nonroot_total * fr_size;
+
+        fs->has_total_bytes = true;
+        fs->has_used_bytes = true;
+    }
+
     g_free(devpath);
+
     return fs;
 }
 
diff --git a/qga/qapi-schema.json b/qga/qapi-schema.json
index 17884c7c70..b1bbb78c59 100644
--- a/qga/qapi-schema.json
+++ b/qga/qapi-schema.json
@@ -846,6 +846,8 @@
 # @name: disk name
 # @mountpoint: mount point path
 # @type: file system type string
+# @used-bytes: file system used bytes (since 3.0)
+# @total-bytes: non-root file system total bytes (since 3.0)
 # @disk: an array of disk hardware information that the volume lies on,
 #        which may be empty if the disk type is not supported
 #
@@ -853,6 +855,7 @@
 ##
 { 'struct': 'GuestFilesystemInfo',
   'data': {'name': 'str', 'mountpoint': 'str', 'type': 'str',
+           '*used-bytes': 'uint64', '*total-bytes': 'uint64',
            'disk': ['GuestDiskAddress']} }
 
 ##
-- 
2.17.1

[Qemu-devel] [PATCH v5.2 2/2] qga-win: add driver path usage to GuestFilesystemInfo

[Chen Hanxiao]

From: Chen Hanxiao <chenhanxiao@gmail.com>

This patch adds support for getting the usage of
windows driver path.
The usage of fs stored as used_bytes and total_bytes.

Cc: Michael Roth <mdroth@linux.vnet.ibm.com>
Signed-off-by: Chen Hanxiao <chenhanxiao@gmail.com>
---
v2:
  unpack usage as used-bytes and total-bytes

 qga/commands-win32.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/qga/commands-win32.c b/qga/commands-win32.c
index 70ee5379f6..0103c0695c 100644
--- a/qga/commands-win32.c
+++ b/qga/commands-win32.c
@@ -670,6 +670,7 @@ static GuestFilesystemInfo *build_guest_fsinfo(char *guid, Error **errp)
     char fs_name[32];
     char vol_info[MAX_PATH+1];
     size_t len;
+    uint64_t i64FreeBytesToCaller, i64TotalBytes, i64FreeBytes;
     GuestFilesystemInfo *fs = NULL;
 
     GetVolumePathNamesForVolumeName(guid, (LPCH)&mnt, 0, &info_size);
@@ -699,10 +700,21 @@ static GuestFilesystemInfo *build_guest_fsinfo(char *guid, Error **errp)
     fs_name[sizeof(fs_name) - 1] = 0;
     fs = g_malloc(sizeof(*fs));
     fs->name = g_strdup(guid);
+    fs->has_total_bytes = false;
+    fs->has_used_bytes = false;
     if (len == 0) {
         fs->mountpoint = g_strdup("System Reserved");
     } else {
         fs->mountpoint = g_strndup(mnt_point, len);
+        if (GetDiskFreeSpaceEx(fs->mountpoint,
+                               (PULARGE_INTEGER) & i64FreeBytesToCaller,
+                               (PULARGE_INTEGER) & i64TotalBytes,
+                               (PULARGE_INTEGER) & i64FreeBytes)) {
+            fs->used_bytes = i64TotalBytes - i64FreeBytes;
+            fs->total_bytes = i64TotalBytes;
+            fs->has_total_bytes = true;
+            fs->has_used_bytes = true;
+        }
     }
     fs->type = g_strdup(fs_name);
     fs->disk = build_guest_disk_info(guid, errp);
-- 
2.17.1