diff options
| author | Chunyan Liu <cyliu@suse.com> | 2014-07-30 10:55:06 +0800 |
|---|---|---|
| committer | Kevin Wolf <kwolf@redhat.com> | 2014-08-15 15:07:14 +0200 |
| commit | 000c4dfff4d7686e2fba3066a477a1290ed60622 (patch) | |
| tree | 43834bc051157a10c42d55ac31263c633a829c23 /block | |
| parent | c6ac36e14569794b3f3e66f796dea19bc0f0b8d3 (diff) | |
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>
Diffstat (limited to 'block')
| -rw-r--r-- | block/qapi.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/block/qapi.c b/block/qapi.c index 28ebb62c8e..79d1e6a9f4 100644 --- a/block/qapi.c +++ b/block/qapi.c @@ -28,6 +28,13 @@ #include "qapi-visit.h" #include "qapi/qmp-output-visitor.h" #include "qapi/qmp/types.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) { @@ -172,6 +179,9 @@ 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) { @@ -201,6 +211,18 @@ 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); @@ -631,4 +653,8 @@ 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"); + } } |