diff options
author | Kevin Wolf <kwolf@redhat.com> | 2015-06-17 14:55:21 +0200 |
---|---|---|
committer | Kevin Wolf <kwolf@redhat.com> | 2015-10-16 15:34:29 +0200 |
commit | 760e006384ecd5b8b8b1b91b5c85ff8fdcb3a21f (patch) | |
tree | 506ef3c27944a2f97069327493f875a2def3d90a /block | |
parent | b26e90f56ad3a494ee6337d2075f4dc55b62b3c6 (diff) | |
download | qemu-760e006384ecd5b8b8b1b91b5c85ff8fdcb3a21f.zip qemu-760e006384ecd5b8b8b1b91b5c85ff8fdcb3a21f.tar.gz qemu-760e006384ecd5b8b8b1b91b5c85ff8fdcb3a21f.tar.bz2 |
block: Convert bs->backing_hd to BdrvChild
This is the final step in converting all of the BlockDriverState
pointers that block drivers use to BdrvChild.
After this patch, bs->children contains the full list of child nodes
that are referenced by a given BDS, and these children are only
referenced through BdrvChild, so that updating the pointer in there is
enough for changing edges in the graph.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Alberto Garcia <berto@igalia.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Diffstat (limited to 'block')
-rw-r--r-- | block/io.c | 24 | ||||
-rw-r--r-- | block/mirror.c | 6 | ||||
-rw-r--r-- | block/qapi.c | 8 | ||||
-rw-r--r-- | block/qcow.c | 4 | ||||
-rw-r--r-- | block/qcow2-cluster.c | 4 | ||||
-rw-r--r-- | block/qcow2.c | 6 | ||||
-rw-r--r-- | block/qed.c | 12 | ||||
-rw-r--r-- | block/stream.c | 8 | ||||
-rw-r--r-- | block/vmdk.c | 21 | ||||
-rw-r--r-- | block/vvfat.c | 6 |
10 files changed, 50 insertions, 49 deletions
@@ -170,24 +170,24 @@ void bdrv_refresh_limits(BlockDriverState *bs, Error **errp) bs->bl.opt_mem_alignment = getpagesize(); } - if (bs->backing_hd) { - bdrv_refresh_limits(bs->backing_hd, &local_err); + if (bs->backing) { + bdrv_refresh_limits(bs->backing->bs, &local_err); if (local_err) { error_propagate(errp, local_err); return; } bs->bl.opt_transfer_length = MAX(bs->bl.opt_transfer_length, - bs->backing_hd->bl.opt_transfer_length); + bs->backing->bs->bl.opt_transfer_length); bs->bl.max_transfer_length = MIN_NON_ZERO(bs->bl.max_transfer_length, - bs->backing_hd->bl.max_transfer_length); + bs->backing->bs->bl.max_transfer_length); bs->bl.opt_mem_alignment = MAX(bs->bl.opt_mem_alignment, - bs->backing_hd->bl.opt_mem_alignment); + bs->backing->bs->bl.opt_mem_alignment); bs->bl.min_mem_alignment = MAX(bs->bl.min_mem_alignment, - bs->backing_hd->bl.min_mem_alignment); + bs->backing->bs->bl.min_mem_alignment); } /* Then let the driver override it */ @@ -227,7 +227,7 @@ static bool bdrv_requests_pending(BlockDriverState *bs) if (bs->file && bdrv_requests_pending(bs->file->bs)) { return true; } - if (bs->backing_hd && bdrv_requests_pending(bs->backing_hd)) { + if (bs->backing && bdrv_requests_pending(bs->backing->bs)) { return true; } return false; @@ -1505,8 +1505,8 @@ static int64_t coroutine_fn bdrv_co_get_block_status(BlockDriverState *bs, } else { if (bdrv_unallocated_blocks_are_zero(bs)) { ret |= BDRV_BLOCK_ZERO; - } else if (bs->backing_hd) { - BlockDriverState *bs2 = bs->backing_hd; + } else if (bs->backing) { + BlockDriverState *bs2 = bs->backing->bs; int64_t nb_sectors2 = bdrv_nb_sectors(bs2); if (nb_sectors2 >= 0 && sector_num >= nb_sectors2) { ret |= BDRV_BLOCK_ZERO; @@ -1551,7 +1551,7 @@ static int64_t coroutine_fn bdrv_co_get_block_status_above(BlockDriverState *bs, int64_t ret = 0; assert(bs != base); - for (p = bs; p != base; p = p->backing_hd) { + for (p = bs; p != base; p = backing_bs(p)) { ret = bdrv_co_get_block_status(p, sector_num, nb_sectors, pnum); if (ret < 0 || ret & BDRV_BLOCK_ALLOCATED) { break; @@ -1614,7 +1614,7 @@ int64_t bdrv_get_block_status(BlockDriverState *bs, int64_t sector_num, int nb_sectors, int *pnum) { - return bdrv_get_block_status_above(bs, bs->backing_hd, + return bdrv_get_block_status_above(bs, backing_bs(bs), sector_num, nb_sectors, pnum); } @@ -1672,7 +1672,7 @@ int bdrv_is_allocated_above(BlockDriverState *top, n = pnum_inter; } - intermediate = intermediate->backing_hd; + intermediate = backing_bs(intermediate); } *pnum = n; diff --git a/block/mirror.c b/block/mirror.c index 1ca4aa0..5d3b8bb 100644 --- a/block/mirror.c +++ b/block/mirror.c @@ -371,7 +371,7 @@ static void mirror_exit(BlockJob *job, void *opaque) if (s->common.driver->job_type == BLOCK_JOB_TYPE_COMMIT) { /* drop the bs loop chain formed by the swap: break the loop then * trigger the unref from the top one */ - BlockDriverState *p = s->base->backing_hd; + BlockDriverState *p = backing_bs(s->base); bdrv_set_backing_hd(s->base, NULL); bdrv_unref(p); } @@ -431,7 +431,7 @@ static void coroutine_fn mirror_run(void *opaque) */ bdrv_get_backing_filename(s->target, backing_filename, sizeof(backing_filename)); - if (backing_filename[0] && !s->target->backing_hd) { + if (backing_filename[0] && !s->target->backing) { ret = bdrv_get_info(s->target, &bdi); if (ret < 0) { goto immediate_exit; @@ -766,7 +766,7 @@ void mirror_start(BlockDriverState *bs, BlockDriverState *target, return; } is_none_mode = mode == MIRROR_SYNC_MODE_NONE; - base = mode == MIRROR_SYNC_MODE_TOP ? bs->backing_hd : NULL; + base = mode == MIRROR_SYNC_MODE_TOP ? backing_bs(bs) : NULL; mirror_start_job(bs, target, replaces, speed, granularity, buf_size, on_source_error, on_target_error, unmap, cb, opaque, errp, diff --git a/block/qapi.c b/block/qapi.c index 0c4654e..355ba32 100644 --- a/block/qapi.c +++ b/block/qapi.c @@ -110,8 +110,8 @@ BlockDeviceInfo *bdrv_block_device_info(BlockDriverState *bs, Error **errp) qapi_free_BlockDeviceInfo(info); return NULL; } - if (bs0->drv && bs0->backing_hd) { - bs0 = bs0->backing_hd; + if (bs0->drv && bs0->backing) { + bs0 = bs0->backing->bs; (*p_image_info)->has_backing_image = true; p_image_info = &((*p_image_info)->backing_image); } else { @@ -362,9 +362,9 @@ static BlockStats *bdrv_query_stats(const BlockDriverState *bs, s->parent = bdrv_query_stats(bs->file->bs, query_backing); } - if (query_backing && bs->backing_hd) { + if (query_backing && bs->backing) { s->has_backing = true; - s->backing = bdrv_query_stats(bs->backing_hd, query_backing); + s->backing = bdrv_query_stats(bs->backing->bs, query_backing); } return s; diff --git a/block/qcow.c b/block/qcow.c index 42f888c..635085e 100644 --- a/block/qcow.c +++ b/block/qcow.c @@ -597,13 +597,13 @@ static coroutine_fn int qcow_co_readv(BlockDriverState *bs, int64_t sector_num, } if (!cluster_offset) { - if (bs->backing_hd) { + if (bs->backing) { /* read from the base image */ hd_iov.iov_base = (void *)buf; hd_iov.iov_len = n * 512; qemu_iovec_init_external(&hd_qiov, &hd_iov, 1); qemu_co_mutex_unlock(&s->lock); - ret = bdrv_co_readv(bs->backing_hd, sector_num, + ret = bdrv_co_readv(bs->backing->bs, sector_num, n, &hd_qiov); qemu_co_mutex_lock(&s->lock); if (ret < 0) { diff --git a/block/qcow2-cluster.c b/block/qcow2-cluster.c index a2f3efc..67be0ce 100644 --- a/block/qcow2-cluster.c +++ b/block/qcow2-cluster.c @@ -1473,7 +1473,7 @@ static int discard_single_l2(BlockDriverState *bs, uint64_t offset, */ switch (qcow2_get_cluster_type(old_l2_entry)) { case QCOW2_CLUSTER_UNALLOCATED: - if (full_discard || !bs->backing_hd) { + if (full_discard || !bs->backing) { continue; } break; @@ -1707,7 +1707,7 @@ static int expand_zero_clusters_in_l1(BlockDriverState *bs, uint64_t *l1_table, } if (!preallocated) { - if (!bs->backing_hd) { + if (!bs->backing) { /* not backed; therefore we can simply deallocate the * cluster */ l2_table[j] = 0; diff --git a/block/qcow2.c b/block/qcow2.c index 38b2797..bacc4f2 100644 --- a/block/qcow2.c +++ b/block/qcow2.c @@ -1369,9 +1369,9 @@ static coroutine_fn int qcow2_co_readv(BlockDriverState *bs, int64_t sector_num, switch (ret) { case QCOW2_CLUSTER_UNALLOCATED: - if (bs->backing_hd) { + if (bs->backing) { /* read from the base image */ - n1 = qcow2_backing_read1(bs->backing_hd, &hd_qiov, + n1 = qcow2_backing_read1(bs->backing->bs, &hd_qiov, sector_num, cur_nr_sectors); if (n1 > 0) { QEMUIOVector local_qiov; @@ -1382,7 +1382,7 @@ static coroutine_fn int qcow2_co_readv(BlockDriverState *bs, int64_t sector_num, BLKDBG_EVENT(bs->file, BLKDBG_READ_BACKING_AIO); qemu_co_mutex_unlock(&s->lock); - ret = bdrv_co_readv(bs->backing_hd, sector_num, + ret = bdrv_co_readv(bs->backing->bs, sector_num, n1, &local_qiov); qemu_co_mutex_lock(&s->lock); diff --git a/block/qed.c b/block/qed.c index d953f8c..0af81dc 100644 --- a/block/qed.c +++ b/block/qed.c @@ -772,8 +772,8 @@ static void qed_read_backing_file(BDRVQEDState *s, uint64_t pos, /* If there is a backing file, get its length. Treat the absence of a * backing file like a zero length backing file. */ - if (s->bs->backing_hd) { - int64_t l = bdrv_getlength(s->bs->backing_hd); + if (s->bs->backing) { + int64_t l = bdrv_getlength(s->bs->backing->bs); if (l < 0) { cb(opaque, l); return; @@ -802,7 +802,7 @@ static void qed_read_backing_file(BDRVQEDState *s, uint64_t pos, qemu_iovec_concat(*backing_qiov, qiov, 0, size); BLKDBG_EVENT(s->bs->file, BLKDBG_READ_BACKING_AIO); - bdrv_aio_readv(s->bs->backing_hd, pos / BDRV_SECTOR_SIZE, + bdrv_aio_readv(s->bs->backing->bs, pos / BDRV_SECTOR_SIZE, *backing_qiov, size / BDRV_SECTOR_SIZE, cb, opaque); } @@ -1081,7 +1081,7 @@ static void qed_aio_write_main(void *opaque, int ret) if (acb->find_cluster_ret == QED_CLUSTER_FOUND) { next_fn = qed_aio_next_io; } else { - if (s->bs->backing_hd) { + if (s->bs->backing) { next_fn = qed_aio_write_flush_before_l2_update; } else { next_fn = qed_aio_write_l2_update_cb; @@ -1139,7 +1139,7 @@ static void qed_aio_write_prefill(void *opaque, int ret) static bool qed_should_set_need_check(BDRVQEDState *s) { /* The flush before L2 update path ensures consistency */ - if (s->bs->backing_hd) { + if (s->bs->backing) { return false; } @@ -1443,7 +1443,7 @@ static int coroutine_fn bdrv_qed_co_write_zeroes(BlockDriverState *bs, struct iovec iov; /* Refuse if there are untouched backing file sectors */ - if (bs->backing_hd) { + if (bs->backing) { if (qed_offset_into_cluster(s, sector_num * BDRV_SECTOR_SIZE) != 0) { return -ENOTSUP; } diff --git a/block/stream.c b/block/stream.c index ab0bd05..ba535c5 100644 --- a/block/stream.c +++ b/block/stream.c @@ -56,7 +56,7 @@ static void close_unused_images(BlockDriverState *top, BlockDriverState *base, const char *base_id) { BlockDriverState *intermediate; - intermediate = top->backing_hd; + intermediate = backing_bs(top); /* Must assign before bdrv_delete() to prevent traversing dangling pointer * while we delete backing image instances. @@ -72,7 +72,7 @@ static void close_unused_images(BlockDriverState *top, BlockDriverState *base, } unused = intermediate; - intermediate = intermediate->backing_hd; + intermediate = backing_bs(intermediate); bdrv_set_backing_hd(unused, NULL); bdrv_unref(unused); } @@ -121,7 +121,7 @@ static void coroutine_fn stream_run(void *opaque) int n = 0; void *buf; - if (!bs->backing_hd) { + if (!bs->backing) { block_job_completed(&s->common, 0); return; } @@ -166,7 +166,7 @@ wait: } else if (ret >= 0) { /* Copy if allocated in the intermediate images. Limit to the * known-unallocated area [sector_num, sector_num+n). */ - ret = bdrv_is_allocated_above(bs->backing_hd, base, + ret = bdrv_is_allocated_above(backing_bs(bs), base, sector_num, n, &n); /* Finish early if end of backing file has been reached */ diff --git a/block/vmdk.c b/block/vmdk.c index 9f7e7db..0effb7d 100644 --- a/block/vmdk.c +++ b/block/vmdk.c @@ -308,10 +308,11 @@ static int vmdk_write_cid(BlockDriverState *bs, uint32_t cid) static int vmdk_is_cid_valid(BlockDriverState *bs) { BDRVVmdkState *s = bs->opaque; - BlockDriverState *p_bs = bs->backing_hd; uint32_t cur_pcid; - if (!s->cid_checked && p_bs) { + if (!s->cid_checked && bs->backing) { + BlockDriverState *p_bs = bs->backing->bs; + cur_pcid = vmdk_read_cid(p_bs, 0); if (s->parent_cid != cur_pcid) { /* CID not valid */ @@ -1006,7 +1007,7 @@ static int get_whole_cluster(BlockDriverState *bs, cluster_bytes = extent->cluster_sectors << BDRV_SECTOR_BITS; whole_grain = qemu_blockalign(bs, cluster_bytes); - if (!bs->backing_hd) { + if (!bs->backing) { memset(whole_grain, 0, skip_start_sector << BDRV_SECTOR_BITS); memset(whole_grain + (skip_end_sector << BDRV_SECTOR_BITS), 0, cluster_bytes - (skip_end_sector << BDRV_SECTOR_BITS)); @@ -1015,15 +1016,15 @@ static int get_whole_cluster(BlockDriverState *bs, assert(skip_end_sector <= extent->cluster_sectors); /* we will be here if it's first write on non-exist grain(cluster). * try to read from parent image, if exist */ - if (bs->backing_hd && !vmdk_is_cid_valid(bs)) { + if (bs->backing && !vmdk_is_cid_valid(bs)) { ret = VMDK_ERROR; goto exit; } /* Read backing data before skip range */ if (skip_start_sector > 0) { - if (bs->backing_hd) { - ret = bdrv_read(bs->backing_hd, sector_num, + if (bs->backing) { + ret = bdrv_read(bs->backing->bs, sector_num, whole_grain, skip_start_sector); if (ret < 0) { ret = VMDK_ERROR; @@ -1039,8 +1040,8 @@ static int get_whole_cluster(BlockDriverState *bs, } /* Read backing data after skip range */ if (skip_end_sector < extent->cluster_sectors) { - if (bs->backing_hd) { - ret = bdrv_read(bs->backing_hd, sector_num + skip_end_sector, + if (bs->backing) { + ret = bdrv_read(bs->backing->bs, sector_num + skip_end_sector, whole_grain + (skip_end_sector << BDRV_SECTOR_BITS), extent->cluster_sectors - skip_end_sector); if (ret < 0) { @@ -1433,11 +1434,11 @@ static int vmdk_read(BlockDriverState *bs, int64_t sector_num, } if (ret != VMDK_OK) { /* if not allocated, try to read from parent image, if exist */ - if (bs->backing_hd && ret != VMDK_ZEROED) { + if (bs->backing && ret != VMDK_ZEROED) { if (!vmdk_is_cid_valid(bs)) { return -EINVAL; } - ret = bdrv_read(bs->backing_hd, sector_num, buf, n); + ret = bdrv_read(bs->backing->bs, sector_num, buf, n); if (ret < 0) { return ret; } diff --git a/block/vvfat.c b/block/vvfat.c index 7ddc962..7c4b0f5 100644 --- a/block/vvfat.c +++ b/block/vvfat.c @@ -2972,9 +2972,9 @@ static int enable_write_target(BDRVVVFATState *s, Error **errp) #endif bdrv_set_backing_hd(s->bs, bdrv_new()); - s->bs->backing_hd->drv = &vvfat_write_target; - s->bs->backing_hd->opaque = g_new(void *, 1); - *(void**)s->bs->backing_hd->opaque = s; + s->bs->backing->bs->drv = &vvfat_write_target; + s->bs->backing->bs->opaque = g_new(void *, 1); + *(void**)s->bs->backing->bs->opaque = s; return 0; |