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qga: add mountpoint usage info to GuestFilesystemInfo 

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>
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
This commit is contained in:
Chen Hanxiao 2018-06-14 16:06:06 +08:00 committed by Michael Roth
parent 141b197408
commit 25b5ff1a86
2 changed files with 18 additions and 0 deletions
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15
qga/commands-posix.c
View File

@ -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;
}

3
qga/qapi-schema.json
View File

@ -848,6 +848,8 @@
# @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
#
@ -855,6 +857,7 @@
##
{ 'struct': 'GuestFilesystemInfo',
'data': {'name': 'str', 'mountpoint': 'str', 'type': 'str',
'*used-bytes': 'uint64', '*total-bytes': 'uint64',
'disk': ['GuestDiskAddress']} }
##