From: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
To: Max Reitz <mreitz@redhat.com>,
"qemu-block@nongnu.org" <qemu-block@nongnu.org>
Cc: Kevin Wolf <kwolf@redhat.com>,
"qemu-devel@nongnu.org" <qemu-devel@nongnu.org>
Subject: Re: [Qemu-devel] [PATCH v6 30/42] qemu-img: Use child access functions
Date: Wed, 14 Aug 2019 16:04:06 +0000 [thread overview]
Message-ID: <ba7a8a5a-8df4-4765-f1f9-4ce4582582f4@virtuozzo.com> (raw)
In-Reply-To: <20190809161407.11920-31-mreitz@redhat.com>
09.08.2019 19:13, Max Reitz wrote:
> This changes iotest 204's output, because blkdebug on top of a COW node
> used to make qemu-img map disregard the rest of the backing chain (the
> backing chain was broken by the filter). With this patch, the
> allocation in the base image is reported correctly.
>
> Signed-off-by: Max Reitz <mreitz@redhat.com>
> ---
> qemu-img.c | 33 ++++++++++++++++++++-------------
> tests/qemu-iotests/204.out | 1 +
> 2 files changed, 21 insertions(+), 13 deletions(-)
>
> diff --git a/qemu-img.c b/qemu-img.c
> index 79983772de..3b30c5ae70 100644
> --- a/qemu-img.c
> +++ b/qemu-img.c
> @@ -1012,7 +1012,7 @@ static int img_commit(int argc, char **argv)
> /* This is different from QMP, which by default uses the deepest file in
> * the backing chain (i.e., the very base); however, the traditional
> * behavior of qemu-img commit is using the immediate backing file. */
> - base_bs = backing_bs(bs);
> + base_bs = bdrv_backing_chain_next(bs);
> if (!base_bs) {
> error_setg(&local_err, "Image does not have a backing file");
> goto done;
> @@ -1632,18 +1632,20 @@ static int convert_iteration_sectors(ImgConvertState *s, int64_t sector_num)
> if (s->sector_next_status <= sector_num) {
> uint64_t offset = (sector_num - src_cur_offset) * BDRV_SECTOR_SIZE;
> int64_t count;
> + BlockDriverState *src_bs = blk_bs(s->src[src_cur]);
> + BlockDriverState *base;
> +
> + if (s->target_has_backing) {
> + base = bdrv_filtered_cow_bs(bdrv_skip_rw_filters(src_bs));
> + } else {
> + base = NULL;
> + }
>
> do {
> count = n * BDRV_SECTOR_SIZE;
>
> - if (s->target_has_backing) {
> - ret = bdrv_block_status(blk_bs(s->src[src_cur]), offset,
> - count, &count, NULL, NULL);
> - } else {
> - ret = bdrv_block_status_above(blk_bs(s->src[src_cur]), NULL,
> - offset, count, &count, NULL,
> - NULL);
> - }
> + ret = bdrv_block_status_above(src_bs, base, offset, count, &count,
> + NULL, NULL);
>
> if (ret < 0) {
> if (s->salvage) {
> @@ -2490,7 +2492,8 @@ static int img_convert(int argc, char **argv)
> * s.target_backing_sectors has to be negative, which it will
> * be automatically). The backing file length is used only
> * for optimizations, so such a case is not fatal. */
> - s.target_backing_sectors = bdrv_nb_sectors(out_bs->backing->bs);
> + s.target_backing_sectors =
> + bdrv_nb_sectors(bdrv_filtered_cow_bs(out_bs));
bdrv_nb_sectors(bdrv_backing_chain_next(out_bs))
> } else {
> s.target_backing_sectors = -1;
> }
> @@ -2853,6 +2856,7 @@ static int get_block_status(BlockDriverState *bs, int64_t offset,
>
> depth = 0;
> for (;;) {
> + bs = bdrv_skip_rw_filters(bs);
> ret = bdrv_block_status(bs, offset, bytes, &bytes, &map, &file);
> if (ret < 0) {
> return ret;
> @@ -2861,7 +2865,7 @@ static int get_block_status(BlockDriverState *bs, int64_t offset,
> if (ret & (BDRV_BLOCK_ZERO|BDRV_BLOCK_DATA)) {
> break;
> }
> - bs = backing_bs(bs);
> + bs = bdrv_filtered_cow_bs(bs);
> if (bs == NULL) {
> ret = 0;
> break;
> @@ -3216,6 +3220,7 @@ static int img_rebase(int argc, char **argv)
> uint8_t *buf_old = NULL;
> uint8_t *buf_new = NULL;
> BlockDriverState *bs = NULL, *prefix_chain_bs = NULL;
> + BlockDriverState *unfiltered_bs;
> char *filename;
> const char *fmt, *cache, *src_cache, *out_basefmt, *out_baseimg;
> int c, flags, src_flags, ret;
> @@ -3350,6 +3355,8 @@ static int img_rebase(int argc, char **argv)
> }
> bs = blk_bs(blk);
>
> + unfiltered_bs = bdrv_skip_rw_filters(bs);
> +
> if (out_basefmt != NULL) {
> if (bdrv_find_format(out_basefmt) == NULL) {
> error_report("Invalid format name: '%s'", out_basefmt);
> @@ -3361,7 +3368,7 @@ static int img_rebase(int argc, char **argv)
> /* For safe rebasing we need to compare old and new backing file */
> if (!unsafe) {
> QDict *options = NULL;
> - BlockDriverState *base_bs = backing_bs(bs);
> + BlockDriverState *base_bs = bdrv_filtered_cow_bs(unfiltered_bs);
>
> if (base_bs) {
> blk_old_backing = blk_new(qemu_get_aio_context(),
> @@ -3517,7 +3524,7 @@ static int img_rebase(int argc, char **argv)
> * If cluster wasn't changed since prefix_chain, we don't need
> * to take action
> */
> - ret = bdrv_is_allocated_above(backing_bs(bs), prefix_chain_bs,
> + ret = bdrv_is_allocated_above(unfiltered_bs, prefix_chain_bs,
s/unfiltered_bs/bdrv_filtered_cow_bs(unfiltered_bs)/
> false, offset, n, &n);
> if (ret < 0) {
> error_report("error while reading image metadata: %s",
> diff --git a/tests/qemu-iotests/204.out b/tests/qemu-iotests/204.out
> index f3a10fbe90..684774d763 100644
> --- a/tests/qemu-iotests/204.out
> +++ b/tests/qemu-iotests/204.out
> @@ -59,5 +59,6 @@ Offset Length File
> 0x900000 0x2400000 TEST_DIR/t.IMGFMT
> 0x3c00000 0x1100000 TEST_DIR/t.IMGFMT
> 0x6a00000 0x400000 TEST_DIR/t.IMGFMT
> +0x6e00000 0x1200000 TEST_DIR/t.IMGFMT.base
> No errors were found on the image.
> *** done
>
With two fixes:
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
--
Best regards,
Vladimir
next prev parent reply other threads:[~2019-08-14 16:05 UTC|newest]
Thread overview: 136+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-09 16:13 [Qemu-devel] [PATCH v6 00/42] block: Deal with filters Max Reitz
2019-08-09 16:13 ` [Qemu-devel] [PATCH v6 01/42] block: Mark commit and mirror as filter drivers Max Reitz
2019-08-09 16:13 ` [Qemu-devel] [PATCH v6 02/42] copy-on-read: Support compressed writes Max Reitz
2019-08-09 16:13 ` [Qemu-devel] [PATCH v6 03/42] throttle: " Max Reitz
2019-08-09 16:13 ` [Qemu-devel] [PATCH v6 04/42] block: Add child access functions Max Reitz
2019-08-09 16:56 ` Eric Blake
2019-09-04 16:16 ` Kevin Wolf
2019-09-09 7:56 ` Max Reitz
2019-09-09 9:36 ` Kevin Wolf
2019-09-09 14:04 ` Max Reitz
2019-09-09 16:13 ` Kevin Wolf
2019-09-10 9:14 ` Max Reitz
2019-09-10 10:47 ` Kevin Wolf
2019-09-10 11:36 ` Max Reitz
2019-09-10 12:48 ` Kevin Wolf
2019-09-10 12:59 ` Max Reitz
2019-09-10 13:10 ` Kevin Wolf
2019-08-09 16:13 ` [Qemu-devel] [PATCH v6 05/42] block: Add chain helper functions Max Reitz
2019-08-09 17:01 ` Eric Blake
2019-08-09 16:13 ` [Qemu-devel] [PATCH v6 06/42] qcow2: Implement .bdrv_storage_child() Max Reitz
2019-08-09 17:07 ` Eric Blake
2019-08-09 16:13 ` [Qemu-devel] [PATCH v6 07/42] block: *filtered_cow_child() for *has_zero_init() Max Reitz
2019-08-09 16:13 ` [Qemu-devel] [PATCH v6 08/42] block: bdrv_set_backing_hd() is about bs->backing Max Reitz
2019-08-09 16:13 ` [Qemu-devel] [PATCH v6 09/42] block: Include filters when freezing backing chain Max Reitz
2019-08-10 13:32 ` Vladimir Sementsov-Ogievskiy
2019-08-12 12:56 ` Max Reitz
2019-09-05 13:05 ` Kevin Wolf
2019-09-09 8:02 ` Max Reitz
2019-09-09 9:40 ` Kevin Wolf
2019-08-09 16:13 ` [Qemu-devel] [PATCH v6 10/42] block: Drop bdrv_is_encrypted() Max Reitz
2019-08-10 13:42 ` Vladimir Sementsov-Ogievskiy
2019-08-09 16:13 ` [Qemu-devel] [PATCH v6 11/42] block: Add bdrv_supports_compressed_writes() Max Reitz
2019-09-05 13:11 ` Kevin Wolf
2019-09-09 8:09 ` Max Reitz
2019-08-09 16:13 ` [Qemu-devel] [PATCH v6 12/42] block: Use bdrv_filtered_rw* where obvious Max Reitz
2019-08-09 16:13 ` [Qemu-devel] [PATCH v6 13/42] block: Use CAFs in block status functions Max Reitz
2019-08-09 16:13 ` [Qemu-devel] [PATCH v6 14/42] block: Use CAFs when working with backing chains Max Reitz
2019-08-10 15:19 ` Vladimir Sementsov-Ogievskiy
2019-09-05 14:05 ` Kevin Wolf
2019-09-09 8:25 ` Max Reitz
2019-09-09 9:55 ` Kevin Wolf
2019-09-09 14:08 ` Max Reitz
2019-08-09 16:13 ` [Qemu-devel] [PATCH v6 15/42] block: Re-evaluate backing file handling in reopen Max Reitz
2019-08-10 16:05 ` Vladimir Sementsov-Ogievskiy
2019-08-09 16:13 ` [Qemu-devel] [PATCH v6 16/42] block: Flush all children in generic code Max Reitz
2019-08-10 15:36 ` Vladimir Sementsov-Ogievskiy
2019-08-12 12:58 ` Max Reitz
2019-09-05 16:24 ` Kevin Wolf
2019-09-09 8:31 ` Max Reitz
2019-09-09 10:01 ` Kevin Wolf
2019-09-09 14:15 ` Max Reitz
2019-08-09 16:13 ` [Qemu-devel] [PATCH v6 17/42] block: Use CAFs in bdrv_refresh_limits() Max Reitz
2019-08-09 16:13 ` [Qemu-devel] [PATCH v6 18/42] block: Use CAFs in bdrv_refresh_filename() Max Reitz
2019-08-10 16:22 ` Vladimir Sementsov-Ogievskiy
2019-08-09 16:13 ` [Qemu-devel] [PATCH v6 19/42] block: Use CAF in bdrv_co_rw_vmstate() Max Reitz
2019-08-09 16:13 ` [Qemu-devel] [PATCH v6 20/42] block/snapshot: Fix fallback Max Reitz
2019-08-10 16:34 ` Vladimir Sementsov-Ogievskiy
2019-08-12 13:06 ` Max Reitz
2019-09-10 11:56 ` Kevin Wolf
2019-09-10 12:04 ` Max Reitz
2019-09-10 12:49 ` Kevin Wolf
2019-09-10 13:06 ` Max Reitz
2019-08-09 16:13 ` [Qemu-devel] [PATCH v6 21/42] block: Use CAFs for debug breakpoints Max Reitz
2019-08-09 16:13 ` [Qemu-devel] [PATCH v6 22/42] block: Fix bdrv_get_allocated_file_size's fallback Max Reitz
2019-08-10 16:41 ` Vladimir Sementsov-Ogievskiy
2019-08-12 13:09 ` Max Reitz
2019-08-12 17:14 ` Vladimir Sementsov-Ogievskiy
2019-08-12 19:15 ` Max Reitz
2019-09-10 14:52 ` Kevin Wolf
2019-09-11 6:20 ` Max Reitz
2019-09-11 6:55 ` Kevin Wolf
2019-09-11 7:37 ` Max Reitz
2019-09-11 8:27 ` Kevin Wolf
2019-09-11 10:00 ` Max Reitz
2019-09-11 10:31 ` Kevin Wolf
2019-09-11 11:00 ` Max Reitz
2019-09-12 10:34 ` Kevin Wolf
2019-11-14 13:11 ` Max Reitz
2019-08-09 16:13 ` [Qemu-devel] [PATCH v6 23/42] blockdev: Use CAF in external_snapshot_prepare() Max Reitz
2019-09-10 15:02 ` Kevin Wolf
2019-09-11 6:21 ` Max Reitz
2019-08-09 16:13 ` [Qemu-devel] [PATCH v6 24/42] block: Use child access functions for QAPI queries Max Reitz
2019-08-10 16:57 ` Vladimir Sementsov-Ogievskiy
2019-08-09 16:13 ` [Qemu-devel] [PATCH v6 25/42] mirror: Deal with filters Max Reitz
2019-08-12 11:09 ` Vladimir Sementsov-Ogievskiy
2019-08-12 13:26 ` Max Reitz
2019-08-14 15:17 ` Vladimir Sementsov-Ogievskiy
2019-08-31 9:57 ` Vladimir Sementsov-Ogievskiy
2019-09-02 14:35 ` Max Reitz
2019-09-03 8:32 ` Vladimir Sementsov-Ogievskiy
2019-09-09 7:41 ` Max Reitz
2019-09-13 12:55 ` Kevin Wolf
2019-09-16 10:26 ` Max Reitz
2019-08-09 16:13 ` [Qemu-devel] [PATCH v6 26/42] backup: " Max Reitz
2019-08-09 16:13 ` [Qemu-devel] [PATCH v6 27/42] commit: " Max Reitz
2019-08-31 10:44 ` Vladimir Sementsov-Ogievskiy
2019-09-02 14:55 ` Max Reitz
2019-08-09 16:13 ` [Qemu-devel] [PATCH v6 28/42] stream: " Max Reitz
2019-08-12 11:55 ` Vladimir Sementsov-Ogievskiy
2019-09-13 14:16 ` Kevin Wolf
2019-09-16 9:52 ` Max Reitz
2019-09-16 14:47 ` Kevin Wolf
2019-12-11 12:52 ` Max Reitz
2019-12-11 15:52 ` Kevin Wolf
2019-12-11 16:12 ` Max Reitz
2019-12-11 16:35 ` Kevin Wolf
2019-08-09 16:13 ` [Qemu-devel] [PATCH v6 29/42] nbd: Use CAF when looking for dirty bitmap Max Reitz
2019-08-09 16:13 ` [Qemu-devel] [PATCH v6 30/42] qemu-img: Use child access functions Max Reitz
2019-08-12 12:14 ` Vladimir Sementsov-Ogievskiy
2019-08-12 13:28 ` Max Reitz
2019-08-14 16:04 ` Vladimir Sementsov-Ogievskiy [this message]
2019-08-09 16:13 ` [Qemu-devel] [PATCH v6 31/42] block: Drop backing_bs() Max Reitz
2019-08-09 16:13 ` [Qemu-devel] [PATCH v6 32/42] block: Make bdrv_get_cumulative_perm() public Max Reitz
2019-08-09 16:13 ` [Qemu-devel] [PATCH v6 33/42] blockdev: Fix active commit choice Max Reitz
2019-08-09 16:13 ` [Qemu-devel] [PATCH v6 34/42] block: Inline bdrv_co_block_status_from_*() Max Reitz
2019-08-09 16:14 ` [Qemu-devel] [PATCH v6 35/42] block: Fix check_to_replace_node() Max Reitz
2019-08-15 15:21 ` Vladimir Sementsov-Ogievskiy
2019-08-15 17:01 ` Max Reitz
2019-08-16 11:01 ` Vladimir Sementsov-Ogievskiy
2019-08-16 13:30 ` Max Reitz
2019-08-16 14:24 ` Vladimir Sementsov-Ogievskiy
2019-08-09 16:14 ` [Qemu-devel] [PATCH v6 36/42] iotests: Add tests for mirror @replaces loops Max Reitz
2019-08-09 16:14 ` [Qemu-devel] [PATCH v6 37/42] block: Leave BDS.backing_file constant Max Reitz
2019-08-16 16:16 ` Vladimir Sementsov-Ogievskiy
2019-08-09 16:14 ` [Qemu-devel] [PATCH v6 38/42] iotests: Let complete_and_wait() work with commit Max Reitz
2019-08-23 5:59 ` Vladimir Sementsov-Ogievskiy
2019-08-09 16:14 ` [Qemu-devel] [PATCH v6 39/42] iotests: Add filter commit test cases Max Reitz
2019-08-31 11:41 ` Vladimir Sementsov-Ogievskiy
2019-09-02 15:06 ` Max Reitz
2019-08-31 12:35 ` Vladimir Sementsov-Ogievskiy
2019-09-02 15:09 ` Max Reitz
2019-08-09 16:14 ` [Qemu-devel] [PATCH v6 40/42] iotests: Add filter mirror " Max Reitz
2019-08-31 12:35 ` Vladimir Sementsov-Ogievskiy
2019-08-09 16:14 ` [Qemu-devel] [PATCH v6 41/42] iotests: Add test for commit in sub directory Max Reitz
2019-08-09 16:14 ` [Qemu-devel] [PATCH v6 42/42] iotests: Test committing to overridden backing Max Reitz
2019-09-03 9:18 ` Vladimir Sementsov-Ogievskiy
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