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Revert "qemu-img info: show nocow info" 

This reverts commit 000c4dfff4.

The main reason for reverting this commit before the 2.2 release is that
it adds a QAPI interface that we don't want to keep: The 'nocow' flag
doesn't generally make sense for block nodes, but only for the raw-posix
driver. It should therefore be part of ImageInfoSpecific rather than
ImageInfo.

The commit contains more problems, but unlike the API stability issue
they wouldn't justify reverting it.

Conflicts:
	block/qapi.c

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Kevin Wolf 2014-11-21 17:43:57 +01:00
parent 0e88f47850
commit 24bf10dac3
2 changed files with 1 additions and 30 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

26
block/qapi.c
View File

@ -29,13 +29,6 @@
#include "qapi/qmp-output-visitor.h"
#include "qapi/qmp/types.h"
#include "sysemu/block-backend.h"
#ifdef __linux__
#include <linux/fs.h>
#include <sys/ioctl.h>
#ifndef FS_NOCOW_FL
#define FS_NOCOW_FL 0x00800000 /* Do not cow file */
#endif
#endif
BlockDeviceInfo *bdrv_block_device_info(BlockDriverState *bs)
{
@ -180,9 +173,6 @@ void bdrv_query_image_info(BlockDriverState *bs,
int ret;
Error *err = NULL;
ImageInfo *info;
#ifdef __linux__
int fd, attr;
#endif
size = bdrv_getlength(bs);
if (size < 0) {
@ -212,18 +202,6 @@ void bdrv_query_image_info(BlockDriverState *bs,
info->format_specific = bdrv_get_specific_info(bs);
info->has_format_specific = info->format_specific != NULL;
#ifdef __linux__
/* get NOCOW info */
fd = qemu_open(bs->filename, O_RDONLY | O_NONBLOCK);
if (fd >= 0) {
if (ioctl(fd, FS_IOC_GETFLAGS, &attr) == 0 && (attr & FS_NOCOW_FL)) {
info->has_nocow = true;
info->nocow = true;
}
qemu_close(fd);
}
#endif
backing_filename = bs->backing_file;
if (backing_filename[0] != '\0') {
info->backing_filename = g_strdup(backing_filename);
@ -655,8 +633,4 @@ void bdrv_image_info_dump(fprintf_function func_fprintf, void *f,
func_fprintf(f, "Format specific information:\n");
bdrv_image_info_specific_dump(func_fprintf, f, info->format_specific);
}
if (info->has_nocow && info->nocow) {
func_fprintf(f, "NOCOW flag: set\n");
}
}

5
qapi/block-core.json
View File

@ -119,8 +119,6 @@
# @format-specific: #optional structure supplying additional format-specific
# information (since 1.7)
#
# @nocow: #optional info of whether NOCOW flag is set or not. (since 2.2)
#
# Since: 1.3
#
##
@ -132,8 +130,7 @@
'*backing-filename': 'str', '*full-backing-filename': 'str',
'*backing-filename-format': 'str', '*snapshots': ['SnapshotInfo'],
'*backing-image': 'ImageInfo',
'*format-specific': 'ImageInfoSpecific',
'*nocow': 'bool' } }
'*format-specific': 'ImageInfoSpecific' } }
##
# @ImageCheck: