diff options
| -rw-r--r-- | block/io.c | 9 | ||||
| -rw-r--r-- | block/qcow2-refcount.c | 32 | ||||
| -rw-r--r-- | block/qcow2.c | 11 | ||||
| -rw-r--r-- | block/qcow2.h | 4 | ||||
| -rw-r--r-- | include/block/block.h | 8 | ||||
| -rwxr-xr-x | tests/qemu-iotests/102 | 2 | ||||
| -rw-r--r-- | tests/qemu-iotests/102.out | 3 | ||||
| -rw-r--r-- | tests/qemu-iotests/141.out | 2 | ||||
| -rw-r--r-- | tests/qemu-iotests/144.out | 2 |
9 files changed, 67 insertions, 6 deletions
@@ -2092,6 +2092,12 @@ static int coroutine_fn bdrv_co_block_status(BlockDriverState *bs, */ assert(*pnum && QEMU_IS_ALIGNED(*pnum, align) && align > offset - aligned_offset); + if (ret & BDRV_BLOCK_RECURSE) { + assert(ret & BDRV_BLOCK_DATA); + assert(ret & BDRV_BLOCK_OFFSET_VALID); + assert(!(ret & BDRV_BLOCK_ZERO)); + } + *pnum -= offset - aligned_offset; if (*pnum > bytes) { *pnum = bytes; @@ -2122,7 +2128,8 @@ static int coroutine_fn bdrv_co_block_status(BlockDriverState *bs, } } - if (want_zero && local_file && local_file != bs && + if (want_zero && ret & BDRV_BLOCK_RECURSE && + local_file && local_file != bs && (ret & BDRV_BLOCK_DATA) && !(ret & BDRV_BLOCK_ZERO) && (ret & BDRV_BLOCK_OFFSET_VALID)) { int64_t file_pnum; diff --git a/block/qcow2-refcount.c b/block/qcow2-refcount.c index 4c1794f..3a2c673 100644 --- a/block/qcow2-refcount.c +++ b/block/qcow2-refcount.c @@ -3444,3 +3444,35 @@ int64_t qcow2_get_last_cluster(BlockDriverState *bs, int64_t size) "There are no references in the refcount table."); return -EIO; } + +int qcow2_detect_metadata_preallocation(BlockDriverState *bs) +{ + BDRVQcow2State *s = bs->opaque; + int64_t i, end_cluster, cluster_count = 0, threshold; + int64_t file_length, real_allocation, real_clusters; + + file_length = bdrv_getlength(bs->file->bs); + if (file_length < 0) { + return file_length; + } + + real_allocation = bdrv_get_allocated_file_size(bs->file->bs); + if (real_allocation < 0) { + return real_allocation; + } + + real_clusters = real_allocation / s->cluster_size; + threshold = MAX(real_clusters * 10 / 9, real_clusters + 2); + + end_cluster = size_to_clusters(s, file_length); + for (i = 0; i < end_cluster && cluster_count < threshold; i++) { + uint64_t refcount; + int ret = qcow2_get_refcount(bs, i, &refcount); + if (ret < 0) { + return ret; + } + cluster_count += !!refcount; + } + + return cluster_count >= threshold; +} diff --git a/block/qcow2.c b/block/qcow2.c index f2cb131..14f9141 100644 --- a/block/qcow2.c +++ b/block/qcow2.c @@ -1895,6 +1895,12 @@ static int coroutine_fn qcow2_co_block_status(BlockDriverState *bs, unsigned int bytes; int status = 0; + if (!s->metadata_preallocation_checked) { + ret = qcow2_detect_metadata_preallocation(bs); + s->metadata_preallocation = (ret == 1); + s->metadata_preallocation_checked = true; + } + bytes = MIN(INT_MAX, count); qemu_co_mutex_lock(&s->lock); ret = qcow2_get_cluster_offset(bs, offset, &bytes, &cluster_offset); @@ -1917,6 +1923,11 @@ static int coroutine_fn qcow2_co_block_status(BlockDriverState *bs, } else if (ret != QCOW2_CLUSTER_UNALLOCATED) { status |= BDRV_BLOCK_DATA; } + if (s->metadata_preallocation && (status & BDRV_BLOCK_DATA) && + (status & BDRV_BLOCK_OFFSET_VALID)) + { + status |= BDRV_BLOCK_RECURSE; + } return status; } diff --git a/block/qcow2.h b/block/qcow2.h index 567375e..fc1b0d3 100644 --- a/block/qcow2.h +++ b/block/qcow2.h @@ -356,6 +356,9 @@ typedef struct BDRVQcow2State { int nb_threads; BdrvChild *data_file; + + bool metadata_preallocation_checked; + bool metadata_preallocation; } BDRVQcow2State; typedef struct Qcow2COWRegion { @@ -655,6 +658,7 @@ int qcow2_change_refcount_order(BlockDriverState *bs, int refcount_order, void *cb_opaque, Error **errp); int qcow2_shrink_reftable(BlockDriverState *bs); int64_t qcow2_get_last_cluster(BlockDriverState *bs, int64_t size); +int qcow2_detect_metadata_preallocation(BlockDriverState *bs); /* qcow2-cluster.c functions */ int qcow2_grow_l1_table(BlockDriverState *bs, uint64_t min_size, diff --git a/include/block/block.h b/include/block/block.h index 9b083e2..531cf59 100644 --- a/include/block/block.h +++ b/include/block/block.h @@ -156,10 +156,15 @@ typedef struct HDGeometry { * BDRV_BLOCK_EOF: the returned pnum covers through end of file for this * layer, set by block layer * - * Internal flag: + * Internal flags: * BDRV_BLOCK_RAW: for use by passthrough drivers, such as raw, to request * that the block layer recompute the answer from the returned * BDS; must be accompanied by just BDRV_BLOCK_OFFSET_VALID. + * BDRV_BLOCK_RECURSE: request that the block layer will recursively search for + * zeroes in file child of current block node inside + * returned region. Only valid together with both + * BDRV_BLOCK_DATA and BDRV_BLOCK_OFFSET_VALID. Should not + * appear with BDRV_BLOCK_ZERO. * * If BDRV_BLOCK_OFFSET_VALID is set, the map parameter represents the * host offset within the returned BDS that is allocated for the @@ -184,6 +189,7 @@ typedef struct HDGeometry { #define BDRV_BLOCK_RAW 0x08 #define BDRV_BLOCK_ALLOCATED 0x10 #define BDRV_BLOCK_EOF 0x20 +#define BDRV_BLOCK_RECURSE 0x40 #define BDRV_BLOCK_OFFSET_MASK BDRV_SECTOR_MASK typedef QSIMPLEQ_HEAD(BlockReopenQueue, BlockReopenQueueEntry) BlockReopenQueue; diff --git a/tests/qemu-iotests/102 b/tests/qemu-iotests/102 index 749ff66..b898df4 100755 --- a/tests/qemu-iotests/102 +++ b/tests/qemu-iotests/102 @@ -55,7 +55,7 @@ $QEMU_IO -c 'write 0 64k' "$TEST_IMG" | _filter_qemu_io $QEMU_IMG resize -f raw --shrink "$TEST_IMG" $((5 * 64 * 1024)) $QEMU_IO -c map "$TEST_IMG" -$QEMU_IMG map "$TEST_IMG" +$QEMU_IMG map "$TEST_IMG" | _filter_qemu_img_map echo echo '=== Testing map on an image file truncated outside of qemu ===' diff --git a/tests/qemu-iotests/102.out b/tests/qemu-iotests/102.out index 4401b08..cd2fdc7 100644 --- a/tests/qemu-iotests/102.out +++ b/tests/qemu-iotests/102.out @@ -7,7 +7,8 @@ wrote 65536/65536 bytes at offset 0 64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) Image resized. 64 KiB (0x10000) bytes allocated at offset 0 bytes (0x0) -Offset Length Mapped to File +Offset Length File +0 0x10000 TEST_DIR/t.IMGFMT === Testing map on an image file truncated outside of qemu === diff --git a/tests/qemu-iotests/141.out b/tests/qemu-iotests/141.out index 41c7291..4d71d9d 100644 --- a/tests/qemu-iotests/141.out +++ b/tests/qemu-iotests/141.out @@ -42,9 +42,9 @@ Formatting 'TEST_DIR/o.IMGFMT', fmt=IMGFMT size=1048576 backing_file=TEST_DIR/t. {"return": {}} {"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "created", "id": "job0"}} {"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "running", "id": "job0"}} +{"return": {}} {"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "ready", "id": "job0"}} {"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "BLOCK_JOB_READY", "data": {"device": "job0", "len": 0, "offset": 0, "speed": 0, "type": "commit"}} -{"return": {}} {"error": {"class": "GenericError", "desc": "Node 'drv0' is busy: block device is in use by block job: commit"}} {"return": {}} {"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "waiting", "id": "job0"}} diff --git a/tests/qemu-iotests/144.out b/tests/qemu-iotests/144.out index 5529920..a9a8216 100644 --- a/tests/qemu-iotests/144.out +++ b/tests/qemu-iotests/144.out @@ -14,10 +14,10 @@ Formatting 'TEST_DIR/tmp.qcow2', fmt=qcow2 size=536870912 backing_file=TEST_DIR/ {"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "created", "id": "virtio0"}} {"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "running", "id": "virtio0"}} +{"return": {}} {"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "ready", "id": "virtio0"}} {"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "BLOCK_JOB_READY", "data": {"device": "virtio0", "len": 0, "offset": 0, "speed": 0, "type": "commit"}} {"return": {}} -{"return": {}} {"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "waiting", "id": "virtio0"}} {"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "pending", "id": "virtio0"}} {"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "BLOCK_JOB_COMPLETED", "data": {"device": "virtio0", "len": 0, "offset": 0, "speed": 0, "type": "commit"}} |