qemu-img info: show nocow info
Add nocow info in 'qemu-img info' output to show whether the file currently has NOCOW flag set or not. Signed-off-by: Chunyan Liu <cyliu@suse.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
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parent
c6ac36e145
commit
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26
block/qapi.c
26
block/qapi.c
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@ -28,6 +28,13 @@
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#include "qapi-visit.h"
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#include "qapi-visit.h"
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#include "qapi/qmp-output-visitor.h"
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#include "qapi/qmp-output-visitor.h"
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#include "qapi/qmp/types.h"
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#include "qapi/qmp/types.h"
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#ifdef __linux__
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#include <linux/fs.h>
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#include <sys/ioctl.h>
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#ifndef FS_NOCOW_FL
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#define FS_NOCOW_FL 0x00800000 /* Do not cow file */
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#endif
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#endif
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BlockDeviceInfo *bdrv_block_device_info(BlockDriverState *bs)
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BlockDeviceInfo *bdrv_block_device_info(BlockDriverState *bs)
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{
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{
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@ -172,6 +179,9 @@ void bdrv_query_image_info(BlockDriverState *bs,
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int ret;
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int ret;
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Error *err = NULL;
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Error *err = NULL;
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ImageInfo *info;
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ImageInfo *info;
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#ifdef __linux__
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int fd, attr;
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#endif
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size = bdrv_getlength(bs);
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size = bdrv_getlength(bs);
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if (size < 0) {
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if (size < 0) {
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@ -201,6 +211,18 @@ void bdrv_query_image_info(BlockDriverState *bs,
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info->format_specific = bdrv_get_specific_info(bs);
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info->format_specific = bdrv_get_specific_info(bs);
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info->has_format_specific = info->format_specific != NULL;
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info->has_format_specific = info->format_specific != NULL;
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#ifdef __linux__
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/* get NOCOW info */
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fd = qemu_open(bs->filename, O_RDONLY | O_NONBLOCK);
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if (fd >= 0) {
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if (ioctl(fd, FS_IOC_GETFLAGS, &attr) == 0 && (attr & FS_NOCOW_FL)) {
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info->has_nocow = true;
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info->nocow = true;
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}
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qemu_close(fd);
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}
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#endif
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backing_filename = bs->backing_file;
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backing_filename = bs->backing_file;
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if (backing_filename[0] != '\0') {
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if (backing_filename[0] != '\0') {
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info->backing_filename = g_strdup(backing_filename);
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info->backing_filename = g_strdup(backing_filename);
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@ -631,4 +653,8 @@ void bdrv_image_info_dump(fprintf_function func_fprintf, void *f,
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func_fprintf(f, "Format specific information:\n");
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func_fprintf(f, "Format specific information:\n");
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bdrv_image_info_specific_dump(func_fprintf, f, info->format_specific);
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bdrv_image_info_specific_dump(func_fprintf, f, info->format_specific);
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}
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}
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if (info->has_nocow && info->nocow) {
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func_fprintf(f, "NOCOW flag: set\n");
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}
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}
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}
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@ -115,6 +115,8 @@
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# @format-specific: #optional structure supplying additional format-specific
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# @format-specific: #optional structure supplying additional format-specific
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# information (since 1.7)
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# information (since 1.7)
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#
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#
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# @nocow: #optional info of whether NOCOW flag is set or not. (since 2.2)
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#
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# Since: 1.3
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# Since: 1.3
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#
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#
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##
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##
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@ -126,7 +128,8 @@
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'*backing-filename': 'str', '*full-backing-filename': 'str',
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'*backing-filename': 'str', '*full-backing-filename': 'str',
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'*backing-filename-format': 'str', '*snapshots': ['SnapshotInfo'],
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'*backing-filename-format': 'str', '*snapshots': ['SnapshotInfo'],
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'*backing-image': 'ImageInfo',
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'*backing-image': 'ImageInfo',
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'*format-specific': 'ImageInfoSpecific' } }
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'*format-specific': 'ImageInfoSpecific',
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'*nocow': 'bool' } }
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##
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##
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# @ImageCheck:
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# @ImageCheck:
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