diff options
Diffstat (limited to 'block')
| -rw-r--r-- | block/qcow2-bitmap.c | 11 | ||||
| -rw-r--r-- | block/qcow2-cluster.c | 24 | ||||
| -rw-r--r-- | block/qcow2-refcount.c | 89 | ||||
| -rw-r--r-- | block/qcow2-snapshot.c | 20 | ||||
| -rw-r--r-- | block/qcow2.c | 27 | ||||
| -rw-r--r-- | block/qcow2.h | 6 |
6 files changed, 94 insertions, 83 deletions
diff --git a/block/qcow2-bitmap.c b/block/qcow2-bitmap.c index 8c34b2aef7..d7a31a8ddc 100644 --- a/block/qcow2-bitmap.c +++ b/block/qcow2-bitmap.c @@ -42,6 +42,9 @@ #define BME_MIN_GRANULARITY_BITS 9 #define BME_MAX_NAME_SIZE 1023 +/* Size of bitmap table entries */ +#define BME_TABLE_ENTRY_SIZE (sizeof(uint64_t)) + QEMU_BUILD_BUG_ON(BME_MAX_NAME_SIZE != BDRV_BITMAP_MAX_NAME_SIZE); #if BME_MAX_TABLE_SIZE * 8ULL > INT_MAX @@ -232,7 +235,7 @@ static int bitmap_table_load(BlockDriverState *bs, Qcow2BitmapTable *tb, assert(tb->size <= BME_MAX_TABLE_SIZE); ret = bdrv_pread(bs->file, tb->offset, - table, tb->size * sizeof(uint64_t)); + table, tb->size * BME_TABLE_ENTRY_SIZE); if (ret < 0) { goto fail; } @@ -265,7 +268,7 @@ static int free_bitmap_clusters(BlockDriverState *bs, Qcow2BitmapTable *tb) } clear_bitmap_table(bs, bitmap_table, tb->size); - qcow2_free_clusters(bs, tb->offset, tb->size * sizeof(uint64_t), + qcow2_free_clusters(bs, tb->offset, tb->size * BME_TABLE_ENTRY_SIZE, QCOW2_DISCARD_OTHER); g_free(bitmap_table); @@ -690,7 +693,7 @@ int qcow2_check_bitmaps_refcounts(BlockDriverState *bs, BdrvCheckResult *res, ret = qcow2_inc_refcounts_imrt(bs, res, refcount_table, refcount_table_size, bm->table.offset, - bm->table.size * sizeof(uint64_t)); + bm->table.size * BME_TABLE_ENTRY_SIZE); if (ret < 0) { goto out; } @@ -1797,7 +1800,7 @@ uint64_t qcow2_get_persistent_dirty_bitmap_size(BlockDriverState *in_bs, /* Assume the entire bitmap is allocated */ bitmaps_size += bmclusters * cluster_size; /* Also reserve space for the bitmap table entries */ - bitmaps_size += ROUND_UP(bmclusters * sizeof(uint64_t), + bitmaps_size += ROUND_UP(bmclusters * BME_TABLE_ENTRY_SIZE, cluster_size); /* And space for contribution to bitmap directory size */ bitmap_dir_size += calc_dir_entry_size(strlen(name), 0); diff --git a/block/qcow2-cluster.c b/block/qcow2-cluster.c index fcdf7af8e6..4530e5e471 100644 --- a/block/qcow2-cluster.c +++ b/block/qcow2-cluster.c @@ -47,8 +47,8 @@ int qcow2_shrink_l1_table(BlockDriverState *bs, uint64_t exact_size) BLKDBG_EVENT(bs->file, BLKDBG_L1_SHRINK_WRITE_TABLE); ret = bdrv_pwrite_zeroes(bs->file, s->l1_table_offset + - new_l1_size * sizeof(uint64_t), - (s->l1_size - new_l1_size) * sizeof(uint64_t), 0); + new_l1_size * L1E_SIZE, + (s->l1_size - new_l1_size) * L1E_SIZE, 0); if (ret < 0) { goto fail; } @@ -76,7 +76,7 @@ fail: * l1_table in memory to avoid possible image corruption. */ memset(s->l1_table + new_l1_size, 0, - (s->l1_size - new_l1_size) * sizeof(uint64_t)); + (s->l1_size - new_l1_size) * L1E_SIZE); return ret; } @@ -96,7 +96,7 @@ int qcow2_grow_l1_table(BlockDriverState *bs, uint64_t min_size, /* Do a sanity check on min_size before trying to calculate new_l1_size * (this prevents overflows during the while loop for the calculation of * new_l1_size) */ - if (min_size > INT_MAX / sizeof(uint64_t)) { + if (min_size > INT_MAX / L1E_SIZE) { return -EFBIG; } @@ -114,7 +114,7 @@ int qcow2_grow_l1_table(BlockDriverState *bs, uint64_t min_size, } QEMU_BUILD_BUG_ON(QCOW_MAX_L1_SIZE > INT_MAX); - if (new_l1_size > QCOW_MAX_L1_SIZE / sizeof(uint64_t)) { + if (new_l1_size > QCOW_MAX_L1_SIZE / L1E_SIZE) { return -EFBIG; } @@ -123,7 +123,7 @@ int qcow2_grow_l1_table(BlockDriverState *bs, uint64_t min_size, s->l1_size, new_l1_size); #endif - new_l1_size2 = sizeof(uint64_t) * new_l1_size; + new_l1_size2 = L1E_SIZE * new_l1_size; new_l1_table = qemu_try_blockalign(bs->file->bs, new_l1_size2); if (new_l1_table == NULL) { return -ENOMEM; @@ -131,7 +131,7 @@ int qcow2_grow_l1_table(BlockDriverState *bs, uint64_t min_size, memset(new_l1_table, 0, new_l1_size2); if (s->l1_size) { - memcpy(new_l1_table, s->l1_table, s->l1_size * sizeof(uint64_t)); + memcpy(new_l1_table, s->l1_table, s->l1_size * L1E_SIZE); } /* write new table (align to cluster) */ @@ -180,7 +180,7 @@ int qcow2_grow_l1_table(BlockDriverState *bs, uint64_t min_size, s->l1_table = new_l1_table; old_l1_size = s->l1_size; s->l1_size = new_l1_size; - qcow2_free_clusters(bs, old_l1_table_offset, old_l1_size * sizeof(uint64_t), + qcow2_free_clusters(bs, old_l1_table_offset, old_l1_size * L1E_SIZE, QCOW2_DISCARD_OTHER); return 0; fail: @@ -225,9 +225,9 @@ int qcow2_write_l1_entry(BlockDriverState *bs, int l1_index) BDRVQcow2State *s = bs->opaque; int l1_start_index; int i, ret; - int bufsize = MAX(sizeof(uint64_t), + int bufsize = MAX(L1E_SIZE, MIN(bs->file->bs->bl.request_alignment, s->cluster_size)); - int nentries = bufsize / sizeof(uint64_t); + int nentries = bufsize / L1E_SIZE; g_autofree uint64_t *buf = g_try_new0(uint64_t, nentries); if (buf == NULL) { @@ -2410,7 +2410,7 @@ int qcow2_expand_zero_clusters(BlockDriverState *bs, Error *local_err = NULL; ret = qcow2_validate_table(bs, s->snapshots[i].l1_table_offset, - s->snapshots[i].l1_size, sizeof(uint64_t), + s->snapshots[i].l1_size, L1E_SIZE, QCOW_MAX_L1_SIZE, "Snapshot L1 table", &local_err); if (ret < 0) { @@ -2418,7 +2418,7 @@ int qcow2_expand_zero_clusters(BlockDriverState *bs, goto fail; } - l1_size2 = s->snapshots[i].l1_size * sizeof(uint64_t); + l1_size2 = s->snapshots[i].l1_size * L1E_SIZE; new_l1_table = g_try_realloc(l1_table, l1_size2); if (!new_l1_table) { diff --git a/block/qcow2-refcount.c b/block/qcow2-refcount.c index aae52607eb..51e9778ed8 100644 --- a/block/qcow2-refcount.c +++ b/block/qcow2-refcount.c @@ -105,8 +105,8 @@ int qcow2_refcount_init(BlockDriverState *bs) s->get_refcount = get_refcount_funcs[s->refcount_order]; s->set_refcount = set_refcount_funcs[s->refcount_order]; - assert(s->refcount_table_size <= INT_MAX / sizeof(uint64_t)); - refcount_table_size2 = s->refcount_table_size * sizeof(uint64_t); + assert(s->refcount_table_size <= INT_MAX / REFTABLE_ENTRY_SIZE); + refcount_table_size2 = s->refcount_table_size * REFTABLE_ENTRY_SIZE; s->refcount_table = g_try_malloc(refcount_table_size2); if (s->refcount_table_size > 0) { @@ -434,8 +434,8 @@ static int alloc_refcount_block(BlockDriverState *bs, if (refcount_table_index < s->refcount_table_size) { uint64_t data64 = cpu_to_be64(new_block); BLKDBG_EVENT(bs->file, BLKDBG_REFBLOCK_ALLOC_HOOKUP); - ret = bdrv_pwrite_sync(bs->file, - s->refcount_table_offset + refcount_table_index * sizeof(uint64_t), + ret = bdrv_pwrite_sync(bs->file, s->refcount_table_offset + + refcount_table_index * REFTABLE_ENTRY_SIZE, &data64, sizeof(data64)); if (ret < 0) { goto fail; @@ -562,8 +562,8 @@ int64_t qcow2_refcount_area(BlockDriverState *bs, uint64_t start_offset, DIV_ROUND_UP(total_refblock_count, 2); } /* The qcow2 file can only store the reftable size in number of clusters */ - table_size = ROUND_UP(table_size, s->cluster_size / sizeof(uint64_t)); - table_clusters = (table_size * sizeof(uint64_t)) / s->cluster_size; + table_size = ROUND_UP(table_size, s->cluster_size / REFTABLE_ENTRY_SIZE); + table_clusters = (table_size * REFTABLE_ENTRY_SIZE) / s->cluster_size; if (table_size > QCOW_MAX_REFTABLE_SIZE) { return -EFBIG; @@ -581,13 +581,13 @@ int64_t qcow2_refcount_area(BlockDriverState *bs, uint64_t start_offset, if (table_size > s->max_refcount_table_index) { /* We're actually growing the reftable */ memcpy(new_table, s->refcount_table, - (s->max_refcount_table_index + 1) * sizeof(uint64_t)); + (s->max_refcount_table_index + 1) * REFTABLE_ENTRY_SIZE); } else { /* Improbable case: We're shrinking the reftable. However, the caller * has assured us that there is only empty space beyond @start_offset, * so we can simply drop all of the refblocks that won't fit into the * new reftable. */ - memcpy(new_table, s->refcount_table, table_size * sizeof(uint64_t)); + memcpy(new_table, s->refcount_table, table_size * REFTABLE_ENTRY_SIZE); } if (new_refblock_offset) { @@ -682,7 +682,7 @@ int64_t qcow2_refcount_area(BlockDriverState *bs, uint64_t start_offset, BLKDBG_EVENT(bs->file, BLKDBG_REFBLOCK_ALLOC_WRITE_TABLE); ret = bdrv_pwrite_sync(bs->file, table_offset, new_table, - table_size * sizeof(uint64_t)); + table_size * REFTABLE_ENTRY_SIZE); if (ret < 0) { goto fail; } @@ -717,7 +717,8 @@ int64_t qcow2_refcount_area(BlockDriverState *bs, uint64_t start_offset, update_max_refcount_table_index(s); /* Free old table. */ - qcow2_free_clusters(bs, old_table_offset, old_table_size * sizeof(uint64_t), + qcow2_free_clusters(bs, old_table_offset, + old_table_size * REFTABLE_ENTRY_SIZE, QCOW2_DISCARD_OTHER); return end_offset; @@ -1253,7 +1254,7 @@ int qcow2_update_snapshot_refcount(BlockDriverState *bs, l2_slice = NULL; l1_table = NULL; - l1_size2 = l1_size * sizeof(uint64_t); + l1_size2 = l1_size * L1E_SIZE; slice_size2 = s->l2_slice_size * l2_entry_size(s); n_slices = s->cluster_size / slice_size2; @@ -1784,7 +1785,7 @@ static int check_refcounts_l1(BlockDriverState *bs, uint64_t *l1_table = NULL, l2_offset, l1_size2; int i, ret; - l1_size2 = l1_size * sizeof(uint64_t); + l1_size2 = l1_size * L1E_SIZE; /* Mark L1 table as used */ ret = qcow2_inc_refcounts_imrt(bs, res, refcount_table, refcount_table_size, @@ -2146,7 +2147,7 @@ static int calculate_refcounts(BlockDriverState *bs, BdrvCheckResult *res, res->corruptions++; continue; } - if (sn->l1_size > QCOW_MAX_L1_SIZE / sizeof(uint64_t)) { + if (sn->l1_size > QCOW_MAX_L1_SIZE / L1E_SIZE) { fprintf(stderr, "ERROR snapshot %s (%s) l1_size=%#" PRIx32 ": " "L1 table is too large; snapshot table entry corrupted\n", sn->id_str, sn->name, sn->l1_size); @@ -2169,7 +2170,8 @@ static int calculate_refcounts(BlockDriverState *bs, BdrvCheckResult *res, /* refcount data */ ret = qcow2_inc_refcounts_imrt(bs, res, refcount_table, nb_clusters, s->refcount_table_offset, - s->refcount_table_size * sizeof(uint64_t)); + s->refcount_table_size * + REFTABLE_ENTRY_SIZE); if (ret < 0) { return ret; } @@ -2390,11 +2392,11 @@ write_refblocks: uint32_t old_reftable_size = reftable_size; uint64_t *new_on_disk_reftable; - reftable_size = ROUND_UP((refblock_index + 1) * sizeof(uint64_t), - s->cluster_size) / sizeof(uint64_t); + reftable_size = ROUND_UP((refblock_index + 1) * REFTABLE_ENTRY_SIZE, + s->cluster_size) / REFTABLE_ENTRY_SIZE; new_on_disk_reftable = g_try_realloc(on_disk_reftable, reftable_size * - sizeof(uint64_t)); + REFTABLE_ENTRY_SIZE); if (!new_on_disk_reftable) { res->check_errors++; ret = -ENOMEM; @@ -2403,7 +2405,7 @@ write_refblocks: on_disk_reftable = new_on_disk_reftable; memset(on_disk_reftable + old_reftable_size, 0, - (reftable_size - old_reftable_size) * sizeof(uint64_t)); + (reftable_size - old_reftable_size) * REFTABLE_ENTRY_SIZE); /* The offset we have for the reftable is now no longer valid; * this will leak that range, but we can easily fix that by running @@ -2420,7 +2422,7 @@ write_refblocks: reftable_offset < 0) { uint64_t reftable_clusters = size_to_clusters(s, reftable_size * - sizeof(uint64_t)); + REFTABLE_ENTRY_SIZE); reftable_offset = alloc_clusters_imrt(bs, reftable_clusters, refcount_table, nb_clusters, &first_free_cluster); @@ -2460,8 +2462,8 @@ write_refblocks: uint64_t post_refblock_start, reftable_clusters; post_refblock_start = ROUND_UP(*nb_clusters, s->refcount_block_size); - reftable_clusters = size_to_clusters(s, - reftable_size * sizeof(uint64_t)); + reftable_clusters = + size_to_clusters(s, reftable_size * REFTABLE_ENTRY_SIZE); /* Not pretty but simple */ if (first_free_cluster < post_refblock_start) { first_free_cluster = post_refblock_start; @@ -2485,16 +2487,16 @@ write_refblocks: } ret = qcow2_pre_write_overlap_check(bs, 0, reftable_offset, - reftable_size * sizeof(uint64_t), + reftable_size * REFTABLE_ENTRY_SIZE, false); if (ret < 0) { fprintf(stderr, "ERROR writing reftable: %s\n", strerror(-ret)); goto fail; } - assert(reftable_size < INT_MAX / sizeof(uint64_t)); + assert(reftable_size < INT_MAX / REFTABLE_ENTRY_SIZE); ret = bdrv_pwrite(bs->file, reftable_offset, on_disk_reftable, - reftable_size * sizeof(uint64_t)); + reftable_size * REFTABLE_ENTRY_SIZE); if (ret < 0) { fprintf(stderr, "ERROR writing reftable: %s\n", strerror(-ret)); goto fail; @@ -2503,7 +2505,7 @@ write_refblocks: /* Enter new reftable into the image header */ reftable_offset_and_clusters.reftable_offset = cpu_to_be64(reftable_offset); reftable_offset_and_clusters.reftable_clusters = - cpu_to_be32(size_to_clusters(s, reftable_size * sizeof(uint64_t))); + cpu_to_be32(size_to_clusters(s, reftable_size * REFTABLE_ENTRY_SIZE)); ret = bdrv_pwrite_sync(bs->file, offsetof(QCowHeader, refcount_table_offset), &reftable_offset_and_clusters, @@ -2693,14 +2695,14 @@ int qcow2_check_metadata_overlap(BlockDriverState *bs, int ign, int64_t offset, offset = start_of_cluster(s, offset); if ((chk & QCOW2_OL_ACTIVE_L1) && s->l1_size) { - if (overlaps_with(s->l1_table_offset, s->l1_size * sizeof(uint64_t))) { + if (overlaps_with(s->l1_table_offset, s->l1_size * L1E_SIZE)) { return QCOW2_OL_ACTIVE_L1; } } if ((chk & QCOW2_OL_REFCOUNT_TABLE) && s->refcount_table_size) { if (overlaps_with(s->refcount_table_offset, - s->refcount_table_size * sizeof(uint64_t))) { + s->refcount_table_size * REFTABLE_ENTRY_SIZE)) { return QCOW2_OL_REFCOUNT_TABLE; } } @@ -2715,7 +2717,7 @@ int qcow2_check_metadata_overlap(BlockDriverState *bs, int ign, int64_t offset, for (i = 0; i < s->nb_snapshots; i++) { if (s->snapshots[i].l1_size && overlaps_with(s->snapshots[i].l1_table_offset, - s->snapshots[i].l1_size * sizeof(uint64_t))) { + s->snapshots[i].l1_size * L1E_SIZE)) { return QCOW2_OL_INACTIVE_L1; } } @@ -2749,11 +2751,11 @@ int qcow2_check_metadata_overlap(BlockDriverState *bs, int ign, int64_t offset, for (i = 0; i < s->nb_snapshots; i++) { uint64_t l1_ofs = s->snapshots[i].l1_table_offset; uint32_t l1_sz = s->snapshots[i].l1_size; - uint64_t l1_sz2 = l1_sz * sizeof(uint64_t); + uint64_t l1_sz2 = l1_sz * L1E_SIZE; uint64_t *l1; int ret; - ret = qcow2_validate_table(bs, l1_ofs, l1_sz, sizeof(uint64_t), + ret = qcow2_validate_table(bs, l1_ofs, l1_sz, L1E_SIZE, QCOW_MAX_L1_SIZE, "", NULL); if (ret < 0) { return ret; @@ -2877,8 +2879,8 @@ static int alloc_refblock(BlockDriverState *bs, uint64_t **reftable, uint64_t new_reftable_size; new_reftable_size = ROUND_UP(reftable_index + 1, - s->cluster_size / sizeof(uint64_t)); - if (new_reftable_size > QCOW_MAX_REFTABLE_SIZE / sizeof(uint64_t)) { + s->cluster_size / REFTABLE_ENTRY_SIZE); + if (new_reftable_size > QCOW_MAX_REFTABLE_SIZE / REFTABLE_ENTRY_SIZE) { error_setg(errp, "This operation would make the refcount table grow " "beyond the maximum size supported by QEMU, aborting"); @@ -2886,14 +2888,14 @@ static int alloc_refblock(BlockDriverState *bs, uint64_t **reftable, } new_reftable = g_try_realloc(*reftable, new_reftable_size * - sizeof(uint64_t)); + REFTABLE_ENTRY_SIZE); if (!new_reftable) { error_setg(errp, "Failed to increase reftable buffer size"); return -ENOMEM; } memset(new_reftable + *reftable_size, 0, - (new_reftable_size - *reftable_size) * sizeof(uint64_t)); + (new_reftable_size - *reftable_size) * REFTABLE_ENTRY_SIZE); *reftable = new_reftable; *reftable_size = new_reftable_size; @@ -3164,13 +3166,14 @@ int qcow2_change_refcount_order(BlockDriverState *bs, int refcount_order, if (new_allocation) { if (new_reftable_offset) { - qcow2_free_clusters(bs, new_reftable_offset, - allocated_reftable_size * sizeof(uint64_t), - QCOW2_DISCARD_NEVER); + qcow2_free_clusters( + bs, new_reftable_offset, + allocated_reftable_size * REFTABLE_ENTRY_SIZE, + QCOW2_DISCARD_NEVER); } new_reftable_offset = qcow2_alloc_clusters(bs, new_reftable_size * - sizeof(uint64_t)); + REFTABLE_ENTRY_SIZE); if (new_reftable_offset < 0) { error_setg_errno(errp, -new_reftable_offset, "Failed to allocate the new reftable"); @@ -3196,7 +3199,7 @@ int qcow2_change_refcount_order(BlockDriverState *bs, int refcount_order, /* Write the new reftable */ ret = qcow2_pre_write_overlap_check(bs, 0, new_reftable_offset, - new_reftable_size * sizeof(uint64_t), + new_reftable_size * REFTABLE_ENTRY_SIZE, false); if (ret < 0) { error_setg_errno(errp, -ret, "Overlap check failed"); @@ -3208,7 +3211,7 @@ int qcow2_change_refcount_order(BlockDriverState *bs, int refcount_order, } ret = bdrv_pwrite(bs->file, new_reftable_offset, new_reftable, - new_reftable_size * sizeof(uint64_t)); + new_reftable_size * REFTABLE_ENTRY_SIZE); for (i = 0; i < new_reftable_size; i++) { be64_to_cpus(&new_reftable[i]); @@ -3285,7 +3288,7 @@ done: if (new_reftable_offset > 0) { qcow2_free_clusters(bs, new_reftable_offset, - new_reftable_size * sizeof(uint64_t), + new_reftable_size * REFTABLE_ENTRY_SIZE, QCOW2_DISCARD_OTHER); } } @@ -3374,7 +3377,7 @@ int qcow2_shrink_reftable(BlockDriverState *bs) { BDRVQcow2State *s = bs->opaque; uint64_t *reftable_tmp = - g_malloc(s->refcount_table_size * sizeof(uint64_t)); + g_malloc(s->refcount_table_size * REFTABLE_ENTRY_SIZE); int i, ret; for (i = 0; i < s->refcount_table_size; i++) { @@ -3412,7 +3415,7 @@ int qcow2_shrink_reftable(BlockDriverState *bs) } ret = bdrv_pwrite_sync(bs->file, s->refcount_table_offset, reftable_tmp, - s->refcount_table_size * sizeof(uint64_t)); + s->refcount_table_size * REFTABLE_ENTRY_SIZE); /* * If the write in the reftable failed the image may contain a partially * overwritten reftable. In this case it would be better to clear the diff --git a/block/qcow2-snapshot.c b/block/qcow2-snapshot.c index 2756b37d24..9b68690f56 100644 --- a/block/qcow2-snapshot.c +++ b/block/qcow2-snapshot.c @@ -659,7 +659,7 @@ int qcow2_snapshot_create(BlockDriverState *bs, QEMUSnapshotInfo *sn_info) sn->extra_data_size = sizeof(QCowSnapshotExtraData); /* Allocate the L1 table of the snapshot and copy the current one there. */ - l1_table_offset = qcow2_alloc_clusters(bs, s->l1_size * sizeof(uint64_t)); + l1_table_offset = qcow2_alloc_clusters(bs, s->l1_size * L1E_SIZE); if (l1_table_offset < 0) { ret = l1_table_offset; goto fail; @@ -679,13 +679,13 @@ int qcow2_snapshot_create(BlockDriverState *bs, QEMUSnapshotInfo *sn_info) } ret = qcow2_pre_write_overlap_check(bs, 0, sn->l1_table_offset, - s->l1_size * sizeof(uint64_t), false); + s->l1_size * L1E_SIZE, false); if (ret < 0) { goto fail; } ret = bdrv_pwrite(bs->file, sn->l1_table_offset, l1_table, - s->l1_size * sizeof(uint64_t)); + s->l1_size * L1E_SIZE); if (ret < 0) { goto fail; } @@ -768,7 +768,7 @@ int qcow2_snapshot_goto(BlockDriverState *bs, const char *snapshot_id) sn = &s->snapshots[snapshot_index]; ret = qcow2_validate_table(bs, sn->l1_table_offset, sn->l1_size, - sizeof(uint64_t), QCOW_MAX_L1_SIZE, + L1E_SIZE, QCOW_MAX_L1_SIZE, "Snapshot L1 table", &local_err); if (ret < 0) { error_report_err(local_err); @@ -803,8 +803,8 @@ int qcow2_snapshot_goto(BlockDriverState *bs, const char *snapshot_id) goto fail; } - cur_l1_bytes = s->l1_size * sizeof(uint64_t); - sn_l1_bytes = sn->l1_size * sizeof(uint64_t); + cur_l1_bytes = s->l1_size * L1E_SIZE; + sn_l1_bytes = sn->l1_size * L1E_SIZE; /* * Copy the snapshot L1 table to the current L1 table. @@ -917,7 +917,7 @@ int qcow2_snapshot_delete(BlockDriverState *bs, sn = s->snapshots[snapshot_index]; ret = qcow2_validate_table(bs, sn.l1_table_offset, sn.l1_size, - sizeof(uint64_t), QCOW_MAX_L1_SIZE, + L1E_SIZE, QCOW_MAX_L1_SIZE, "Snapshot L1 table", errp); if (ret < 0) { return ret; @@ -953,7 +953,7 @@ int qcow2_snapshot_delete(BlockDriverState *bs, error_setg_errno(errp, -ret, "Failed to free the cluster and L1 table"); return ret; } - qcow2_free_clusters(bs, sn.l1_table_offset, sn.l1_size * sizeof(uint64_t), + qcow2_free_clusters(bs, sn.l1_table_offset, sn.l1_size * L1E_SIZE, QCOW2_DISCARD_SNAPSHOT); /* must update the copied flag on the current cluster offsets */ @@ -1030,12 +1030,12 @@ int qcow2_snapshot_load_tmp(BlockDriverState *bs, /* Allocate and read in the snapshot's L1 table */ ret = qcow2_validate_table(bs, sn->l1_table_offset, sn->l1_size, - sizeof(uint64_t), QCOW_MAX_L1_SIZE, + L1E_SIZE, QCOW_MAX_L1_SIZE, "Snapshot L1 table", errp); if (ret < 0) { return ret; } - new_l1_bytes = sn->l1_size * sizeof(uint64_t); + new_l1_bytes = sn->l1_size * L1E_SIZE; new_l1_table = qemu_try_blockalign(bs->file->bs, new_l1_bytes); if (new_l1_table == NULL) { return -ENOMEM; diff --git a/block/qcow2.c b/block/qcow2.c index da56b1a4df..ef9a45e82f 100644 --- a/block/qcow2.c +++ b/block/qcow2.c @@ -1543,7 +1543,7 @@ static int coroutine_fn qcow2_do_open(BlockDriverState *bs, QDict *options, /* read the level 1 table */ ret = qcow2_validate_table(bs, header.l1_table_offset, - header.l1_size, sizeof(uint64_t), + header.l1_size, L1E_SIZE, QCOW_MAX_L1_SIZE, "Active L1 table", errp); if (ret < 0) { goto fail; @@ -1568,15 +1568,14 @@ static int coroutine_fn qcow2_do_open(BlockDriverState *bs, QDict *options, } if (s->l1_size > 0) { - s->l1_table = qemu_try_blockalign(bs->file->bs, - s->l1_size * sizeof(uint64_t)); + s->l1_table = qemu_try_blockalign(bs->file->bs, s->l1_size * L1E_SIZE); if (s->l1_table == NULL) { error_setg(errp, "Could not allocate L1 table"); ret = -ENOMEM; goto fail; } ret = bdrv_pread(bs->file, s->l1_table_offset, s->l1_table, - s->l1_size * sizeof(uint64_t)); + s->l1_size * L1E_SIZE); if (ret < 0) { error_setg_errno(errp, -ret, "Could not read L1 table"); goto fail; @@ -3213,7 +3212,7 @@ int64_t qcow2_refcount_metadata_size(int64_t clusters, size_t cluster_size, * where no further refcount blocks or table clusters are required to * reference count every cluster. */ - int64_t blocks_per_table_cluster = cluster_size / sizeof(uint64_t); + int64_t blocks_per_table_cluster = cluster_size / REFTABLE_ENTRY_SIZE; int64_t refcounts_per_block = cluster_size * 8 / (1 << refcount_order); int64_t table = 0; /* number of refcount table clusters */ int64_t blocks = 0; /* number of refcount block clusters */ @@ -3270,8 +3269,8 @@ static int64_t qcow2_calc_prealloc_size(int64_t total_size, /* total size of L1 tables */ nl1e = nl2e * l2e_size / cluster_size; - nl1e = ROUND_UP(nl1e, cluster_size / sizeof(uint64_t)); - meta_size += nl1e * sizeof(uint64_t); + nl1e = ROUND_UP(nl1e, cluster_size / L1E_SIZE); + meta_size += nl1e * L1E_SIZE; /* total size of refcount table and blocks */ meta_size += qcow2_refcount_metadata_size( @@ -4460,7 +4459,7 @@ static int coroutine_fn qcow2_co_truncate(BlockDriverState *bs, int64_t offset, /* write updated header.size */ offset = cpu_to_be64(offset); ret = bdrv_pwrite_sync(bs->file, offsetof(QCowHeader, size), - &offset, sizeof(uint64_t)); + &offset, sizeof(offset)); if (ret < 0) { error_setg_errno(errp, -ret, "Failed to update the image size"); goto fail; @@ -4700,8 +4699,8 @@ static int make_completely_empty(BlockDriverState *bs) BLKDBG_EVENT(bs->file, BLKDBG_L1_UPDATE); - l1_clusters = DIV_ROUND_UP(s->l1_size, s->cluster_size / sizeof(uint64_t)); - l1_size2 = (uint64_t)s->l1_size * sizeof(uint64_t); + l1_clusters = DIV_ROUND_UP(s->l1_size, s->cluster_size / L1E_SIZE); + l1_size2 = (uint64_t)s->l1_size * L1E_SIZE; /* After this call, neither the in-memory nor the on-disk refcount * information accurately describe the actual references */ @@ -4747,14 +4746,14 @@ static int make_completely_empty(BlockDriverState *bs) s->l1_table_offset = 3 * s->cluster_size; - new_reftable = g_try_new0(uint64_t, s->cluster_size / sizeof(uint64_t)); + new_reftable = g_try_new0(uint64_t, s->cluster_size / REFTABLE_ENTRY_SIZE); if (!new_reftable) { ret = -ENOMEM; goto fail_broken_refcounts; } s->refcount_table_offset = s->cluster_size; - s->refcount_table_size = s->cluster_size / sizeof(uint64_t); + s->refcount_table_size = s->cluster_size / REFTABLE_ENTRY_SIZE; s->max_refcount_table_index = 0; g_free(s->refcount_table); @@ -4826,7 +4825,7 @@ static int qcow2_make_empty(BlockDriverState *bs) int step = QEMU_ALIGN_DOWN(INT_MAX, s->cluster_size); int l1_clusters, ret = 0; - l1_clusters = DIV_ROUND_UP(s->l1_size, s->cluster_size / sizeof(uint64_t)); + l1_clusters = DIV_ROUND_UP(s->l1_size, s->cluster_size / L1E_SIZE); if (s->qcow_version >= 3 && !s->snapshots && !s->nb_bitmaps && 3 + l1_clusters <= s->refcount_block_size && @@ -4957,7 +4956,7 @@ static BlockMeasureInfo *qcow2_measure(QemuOpts *opts, BlockDriverState *in_bs, l2e_size = extended_l2 ? L2E_SIZE_EXTENDED : L2E_SIZE_NORMAL; l2_tables = DIV_ROUND_UP(virtual_size / cluster_size, cluster_size / l2e_size); - if (l2_tables * sizeof(uint64_t) > QCOW_MAX_L1_SIZE) { + if (l2_tables * L1E_SIZE > QCOW_MAX_L1_SIZE) { error_setg(&local_err, "The image size is too large " "(try using a larger cluster size)"); goto err; diff --git a/block/qcow2.h b/block/qcow2.h index 065ec3df0b..83cfa0c391 100644 --- a/block/qcow2.h +++ b/block/qcow2.h @@ -99,6 +99,12 @@ #define L2E_SIZE_NORMAL (sizeof(uint64_t)) #define L2E_SIZE_EXTENDED (sizeof(uint64_t) * 2) +/* Size of L1 table entries */ +#define L1E_SIZE (sizeof(uint64_t)) + +/* Size of reftable entries */ +#define REFTABLE_ENTRY_SIZE (sizeof(uint64_t)) + #define MIN_CLUSTER_BITS 9 #define MAX_CLUSTER_BITS 21 |