diff options
| author | Kevin Wolf <kwolf@redhat.com> | 2016-09-12 19:08:31 +0200 |
|---|---|---|
| committer | Kevin Wolf <kwolf@redhat.com> | 2016-09-29 14:13:39 +0200 |
| commit | b85114f8cfbede8b153db68875973ef0790bf296 (patch) | |
| tree | f145eb5c7d45e3e2ad8eefb5c06ac5bf72d20883 | |
| parent | 692e01a27ccde4120f1371227d4011f668d67a76 (diff) | |
| download | qemu-b85114f8cfbede8b153db68875973ef0790bf296.zip qemu-b85114f8cfbede8b153db68875973ef0790bf296.tar.gz qemu-b85114f8cfbede8b153db68875973ef0790bf296.tar.bz2 | |
block: Use 'detect-zeroes' option for 'blockdev-change-medium'
Instead of modifying the new BDS after it has been opened, use the newly
supported 'detect-zeroes' option in bdrv_open_common() so that all
requirements are checked (detect-zeroes=unmap requires discard=unmap).
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
| -rw-r--r-- | block/block-backend.c | 9 | ||||
| -rw-r--r-- | blockdev.c | 9 | ||||
| -rw-r--r-- | include/sysemu/block-backend.h | 2 |
3 files changed, 11 insertions, 9 deletions
diff --git a/block/block-backend.c b/block/block-backend.c index f34bad5..639294b 100644 --- a/block/block-backend.c +++ b/block/block-backend.c @@ -1592,13 +1592,12 @@ void blk_update_root_state(BlockBackend *blk) } /* - * Applies the information in the root state to the given BlockDriverState. This - * does not include the flags which have to be specified for bdrv_open(), use - * blk_get_open_flags_from_root_state() to inquire them. + * Returns the detect-zeroes setting to be used for bdrv_open() of a + * BlockDriverState which is supposed to inherit the root state. */ -void blk_apply_root_state(BlockBackend *blk, BlockDriverState *bs) +bool blk_get_detect_zeroes_from_root_state(BlockBackend *blk) { - bs->detect_zeroes = blk->root_state.detect_zeroes; + return blk->root_state.detect_zeroes; } /* @@ -2546,6 +2546,7 @@ void qmp_blockdev_change_medium(bool has_device, const char *device, BlockBackend *blk; BlockDriverState *medium_bs = NULL; int bdrv_flags; + bool detect_zeroes; int rc; QDict *options = NULL; Error *err = NULL; @@ -2585,8 +2586,12 @@ void qmp_blockdev_change_medium(bool has_device, const char *device, abort(); } + options = qdict_new(); + detect_zeroes = blk_get_detect_zeroes_from_root_state(blk); + qdict_put(options, "detect-zeroes", + qstring_from_str(detect_zeroes ? "on" : "off")); + if (has_format) { - options = qdict_new(); qdict_put(options, "driver", qstring_from_str(format)); } @@ -2623,8 +2628,6 @@ void qmp_blockdev_change_medium(bool has_device, const char *device, goto fail; } - blk_apply_root_state(blk, medium_bs); - qmp_blockdev_close_tray(has_device, device, has_id, id, errp); fail: diff --git a/include/sysemu/block-backend.h b/include/sysemu/block-backend.h index 24d1d85..a7993af 100644 --- a/include/sysemu/block-backend.h +++ b/include/sysemu/block-backend.h @@ -198,7 +198,7 @@ void blk_io_unplug(BlockBackend *blk); BlockAcctStats *blk_get_stats(BlockBackend *blk); BlockBackendRootState *blk_get_root_state(BlockBackend *blk); void blk_update_root_state(BlockBackend *blk); -void blk_apply_root_state(BlockBackend *blk, BlockDriverState *bs); +bool blk_get_detect_zeroes_from_root_state(BlockBackend *blk); int blk_get_open_flags_from_root_state(BlockBackend *blk); void *blk_aio_get(const AIOCBInfo *aiocb_info, BlockBackend *blk, |