diff options
| -rw-r--r-- | block.c | 3 | ||||
| -rw-r--r-- | block/qcow2-refcount.c | 120 | ||||
| -rw-r--r-- | block/qcow2.c | 4 | ||||
| -rw-r--r-- | block/qcow2.h | 2 | ||||
| -rw-r--r-- | block/vdi.c | 10 | ||||
| -rw-r--r-- | block_int.h | 7 |
6 files changed, 79 insertions, 67 deletions
@@ -721,8 +721,7 @@ int bdrv_check(BlockDriverState *bs, BdrvCheckResult *res) } memset(res, 0, sizeof(*res)); - res->corruptions = bs->drv->bdrv_check(bs); - return res->corruptions < 0 ? res->corruptions : 0; + return bs->drv->bdrv_check(bs, res); } /* commit COW file into the raw image */ diff --git a/block/qcow2-refcount.c b/block/qcow2-refcount.c index 4a96d986c9..4c19e7ebd8 100644 --- a/block/qcow2-refcount.c +++ b/block/qcow2-refcount.c @@ -884,9 +884,10 @@ int qcow2_update_snapshot_refcount(BlockDriverState *bs, * This is used to construct a temporary refcount table out of L1 and L2 tables * which can be compared the the refcount table saved in the image. * - * Returns the number of errors in the image that were found + * Modifies the number of errors in res. */ -static int inc_refcounts(BlockDriverState *bs, +static void inc_refcounts(BlockDriverState *bs, + BdrvCheckResult *res, uint16_t *refcount_table, int refcount_table_size, int64_t offset, int64_t size) @@ -894,30 +895,32 @@ static int inc_refcounts(BlockDriverState *bs, BDRVQcowState *s = bs->opaque; int64_t start, last, cluster_offset; int k; - int errors = 0; if (size <= 0) - return 0; + return; start = offset & ~(s->cluster_size - 1); last = (offset + size - 1) & ~(s->cluster_size - 1); for(cluster_offset = start; cluster_offset <= last; cluster_offset += s->cluster_size) { k = cluster_offset >> s->cluster_bits; - if (k < 0 || k >= refcount_table_size) { + if (k < 0) { fprintf(stderr, "ERROR: invalid cluster offset=0x%" PRIx64 "\n", cluster_offset); - errors++; + res->corruptions++; + } else if (k >= refcount_table_size) { + fprintf(stderr, "Warning: cluster offset=0x%" PRIx64 " is after " + "the end of the image file, can't properly check refcounts.\n", + cluster_offset); + res->check_errors++; } else { if (++refcount_table[k] == 0) { fprintf(stderr, "ERROR: overflow cluster offset=0x%" PRIx64 "\n", cluster_offset); - errors++; + res->corruptions++; } } } - - return errors; } /* @@ -928,14 +931,13 @@ static int inc_refcounts(BlockDriverState *bs, * Returns the number of errors found by the checks or -errno if an internal * error occurred. */ -static int check_refcounts_l2(BlockDriverState *bs, +static int check_refcounts_l2(BlockDriverState *bs, BdrvCheckResult *res, uint16_t *refcount_table, int refcount_table_size, int64_t l2_offset, int check_copied) { BDRVQcowState *s = bs->opaque; uint64_t *l2_table, offset; int i, l2_size, nb_csectors, refcount; - int errors = 0; /* Read L2 table from disk */ l2_size = s->l2_size * sizeof(uint64_t); @@ -955,16 +957,15 @@ static int check_refcounts_l2(BlockDriverState *bs, "copied flag must never be set for compressed " "clusters\n", offset >> s->cluster_bits); offset &= ~QCOW_OFLAG_COPIED; - errors++; + res->corruptions++; } /* Mark cluster as used */ nb_csectors = ((offset >> s->csize_shift) & s->csize_mask) + 1; offset &= s->cluster_offset_mask; - errors += inc_refcounts(bs, refcount_table, - refcount_table_size, - offset & ~511, nb_csectors * 512); + inc_refcounts(bs, res, refcount_table, refcount_table_size, + offset & ~511, nb_csectors * 512); } else { /* QCOW_OFLAG_COPIED must be set iff refcount == 1 */ if (check_copied) { @@ -974,35 +975,35 @@ static int check_refcounts_l2(BlockDriverState *bs, if (refcount < 0) { fprintf(stderr, "Can't get refcount for offset %" PRIx64 ": %s\n", entry, strerror(-refcount)); + goto fail; } if ((refcount == 1) != ((entry & QCOW_OFLAG_COPIED) != 0)) { fprintf(stderr, "ERROR OFLAG_COPIED: offset=%" PRIx64 " refcount=%d\n", entry, refcount); - errors++; + res->corruptions++; } } /* Mark cluster as used */ offset &= ~QCOW_OFLAG_COPIED; - errors += inc_refcounts(bs, refcount_table, - refcount_table_size, - offset, s->cluster_size); + inc_refcounts(bs, res, refcount_table,refcount_table_size, + offset, s->cluster_size); /* Correct offsets are cluster aligned */ if (offset & (s->cluster_size - 1)) { fprintf(stderr, "ERROR offset=%" PRIx64 ": Cluster is not " "properly aligned; L2 entry corrupted.\n", offset); - errors++; + res->corruptions++; } } } } qemu_free(l2_table); - return errors; + return 0; fail: - fprintf(stderr, "ERROR: I/O error in check_refcounts_l1\n"); + fprintf(stderr, "ERROR: I/O error in check_refcounts_l2\n"); qemu_free(l2_table); return -EIO; } @@ -1016,6 +1017,7 @@ fail: * error occurred. */ static int check_refcounts_l1(BlockDriverState *bs, + BdrvCheckResult *res, uint16_t *refcount_table, int refcount_table_size, int64_t l1_table_offset, int l1_size, @@ -1024,13 +1026,12 @@ static int check_refcounts_l1(BlockDriverState *bs, BDRVQcowState *s = bs->opaque; uint64_t *l1_table, l2_offset, l1_size2; int i, refcount, ret; - int errors = 0; l1_size2 = l1_size * sizeof(uint64_t); /* Mark L1 table as used */ - errors += inc_refcounts(bs, refcount_table, refcount_table_size, - l1_table_offset, l1_size2); + inc_refcounts(bs, res, refcount_table, refcount_table_size, + l1_table_offset, l1_size2); /* Read L1 table entries from disk */ if (l1_size2 == 0) { @@ -1055,42 +1056,41 @@ static int check_refcounts_l1(BlockDriverState *bs, if (refcount < 0) { fprintf(stderr, "Can't get refcount for l2_offset %" PRIx64 ": %s\n", l2_offset, strerror(-refcount)); + goto fail; } if ((refcount == 1) != ((l2_offset & QCOW_OFLAG_COPIED) != 0)) { fprintf(stderr, "ERROR OFLAG_COPIED: l2_offset=%" PRIx64 " refcount=%d\n", l2_offset, refcount); - errors++; + res->corruptions++; } } /* Mark L2 table as used */ l2_offset &= ~QCOW_OFLAG_COPIED; - errors += inc_refcounts(bs, refcount_table, - refcount_table_size, - l2_offset, - s->cluster_size); + inc_refcounts(bs, res, refcount_table, refcount_table_size, + l2_offset, s->cluster_size); /* L2 tables are cluster aligned */ if (l2_offset & (s->cluster_size - 1)) { fprintf(stderr, "ERROR l2_offset=%" PRIx64 ": Table is not " "cluster aligned; L1 entry corrupted\n", l2_offset); - errors++; + res->corruptions++; } /* Process and check L2 entries */ - ret = check_refcounts_l2(bs, refcount_table, refcount_table_size, - l2_offset, check_copied); + ret = check_refcounts_l2(bs, res, refcount_table, + refcount_table_size, l2_offset, check_copied); if (ret < 0) { goto fail; } - errors += ret; } } qemu_free(l1_table); - return errors; + return 0; fail: fprintf(stderr, "ERROR: I/O error in check_refcounts_l1\n"); + res->check_errors++; qemu_free(l1_table); return -EIO; } @@ -1101,44 +1101,47 @@ fail: * Returns 0 if no errors are found, the number of errors in case the image is * detected as corrupted, and -errno when an internal error occured. */ -int qcow2_check_refcounts(BlockDriverState *bs) +int qcow2_check_refcounts(BlockDriverState *bs, BdrvCheckResult *res) { BDRVQcowState *s = bs->opaque; int64_t size; int nb_clusters, refcount1, refcount2, i; QCowSnapshot *sn; uint16_t *refcount_table; - int ret, errors = 0; + int ret; size = bdrv_getlength(bs->file); nb_clusters = size_to_clusters(s, size); refcount_table = qemu_mallocz(nb_clusters * sizeof(uint16_t)); /* header */ - errors += inc_refcounts(bs, refcount_table, nb_clusters, - 0, s->cluster_size); + inc_refcounts(bs, res, refcount_table, nb_clusters, + 0, s->cluster_size); /* current L1 table */ - ret = check_refcounts_l1(bs, refcount_table, nb_clusters, + ret = check_refcounts_l1(bs, res, refcount_table, nb_clusters, s->l1_table_offset, s->l1_size, 1); if (ret < 0) { return ret; } - errors += ret; /* snapshots */ for(i = 0; i < s->nb_snapshots; i++) { sn = s->snapshots + i; - check_refcounts_l1(bs, refcount_table, nb_clusters, - sn->l1_table_offset, sn->l1_size, 0); + ret = check_refcounts_l1(bs, res, refcount_table, nb_clusters, + sn->l1_table_offset, sn->l1_size, 0); + if (ret < 0) { + return ret; + } } - errors += inc_refcounts(bs, refcount_table, nb_clusters, - s->snapshots_offset, s->snapshots_size); + inc_refcounts(bs, res, refcount_table, nb_clusters, + s->snapshots_offset, s->snapshots_size); /* refcount data */ - errors += inc_refcounts(bs, refcount_table, nb_clusters, - s->refcount_table_offset, - s->refcount_table_size * sizeof(uint64_t)); + inc_refcounts(bs, res, refcount_table, nb_clusters, + s->refcount_table_offset, + s->refcount_table_size * sizeof(uint64_t)); + for(i = 0; i < s->refcount_table_size; i++) { uint64_t offset, cluster; offset = s->refcount_table[i]; @@ -1148,22 +1151,23 @@ int qcow2_check_refcounts(BlockDriverState *bs) if (offset & (s->cluster_size - 1)) { fprintf(stderr, "ERROR refcount block %d is not " "cluster aligned; refcount table entry corrupted\n", i); - errors++; + res->corruptions++; continue; } if (cluster >= nb_clusters) { fprintf(stderr, "ERROR refcount block %d is outside image\n", i); - errors++; + res->corruptions++; continue; } if (offset != 0) { - errors += inc_refcounts(bs, refcount_table, nb_clusters, - offset, s->cluster_size); + inc_refcounts(bs, res, refcount_table, nb_clusters, + offset, s->cluster_size); if (refcount_table[cluster] != 1) { fprintf(stderr, "ERROR refcount block %d refcount=%d\n", i, refcount_table[cluster]); + res->corruptions++; } } } @@ -1174,19 +1178,25 @@ int qcow2_check_refcounts(BlockDriverState *bs) if (refcount1 < 0) { fprintf(stderr, "Can't get refcount for cluster %d: %s\n", i, strerror(-refcount1)); + res->check_errors++; continue; } refcount2 = refcount_table[i]; if (refcount1 != refcount2) { - fprintf(stderr, "ERROR cluster %d refcount=%d reference=%d\n", + fprintf(stderr, "%s cluster %d refcount=%d reference=%d\n", + refcount1 < refcount2 ? "ERROR" : "Leaked", i, refcount1, refcount2); - errors++; + if (refcount1 < refcount2) { + res->corruptions++; + } else { + res->leaks++; + } } } qemu_free(refcount_table); - return errors; + return 0; } diff --git a/block/qcow2.c b/block/qcow2.c index 9ee34b6dd0..a53014dbda 100644 --- a/block/qcow2.c +++ b/block/qcow2.c @@ -1239,9 +1239,9 @@ static int qcow_get_info(BlockDriverState *bs, BlockDriverInfo *bdi) } -static int qcow_check(BlockDriverState *bs) +static int qcow_check(BlockDriverState *bs, BdrvCheckResult *result) { - return qcow2_check_refcounts(bs); + return qcow2_check_refcounts(bs, result); } #if 0 diff --git a/block/qcow2.h b/block/qcow2.h index c59b827da8..3ff162efcd 100644 --- a/block/qcow2.h +++ b/block/qcow2.h @@ -185,7 +185,7 @@ void qcow2_create_refcount_update(QCowCreateState *s, int64_t offset, int qcow2_update_snapshot_refcount(BlockDriverState *bs, int64_t l1_table_offset, int l1_size, int addend); -int qcow2_check_refcounts(BlockDriverState *bs); +int qcow2_check_refcounts(BlockDriverState *bs, BdrvCheckResult *res); /* qcow2-cluster.c functions */ int qcow2_grow_l1_table(BlockDriverState *bs, int min_size); diff --git a/block/vdi.c b/block/vdi.c index ee8cc7b1aa..f72633cf19 100644 --- a/block/vdi.c +++ b/block/vdi.c @@ -291,11 +291,10 @@ static void vdi_header_print(VdiHeader *header) } #endif -static int vdi_check(BlockDriverState *bs) +static int vdi_check(BlockDriverState *bs, BdrvCheckResult *res) { /* TODO: additional checks possible. */ BDRVVdiState *s = (BDRVVdiState *)bs->opaque; - int n_errors = 0; uint32_t blocks_allocated = 0; uint32_t block; uint32_t *bmap; @@ -315,11 +314,12 @@ static int vdi_check(BlockDriverState *bs) } else { fprintf(stderr, "ERROR: block index %" PRIu32 " also used by %" PRIu32 "\n", bmap[bmap_entry], bmap_entry); + res->corruptions++; } } else { fprintf(stderr, "ERROR: block index %" PRIu32 " too large, is %" PRIu32 "\n", block, bmap_entry); - n_errors++; + res->corruptions++; } } } @@ -327,12 +327,12 @@ static int vdi_check(BlockDriverState *bs) fprintf(stderr, "ERROR: allocated blocks mismatch, is %" PRIu32 ", should be %" PRIu32 "\n", blocks_allocated, s->header.blocks_allocated); - n_errors++; + res->corruptions++; } qemu_free(bmap); - return n_errors; + return 0; } static int vdi_get_info(BlockDriverState *bs, BlockDriverInfo *bdi) diff --git a/block_int.h b/block_int.h index a94b80152f..877e1e5943 100644 --- a/block_int.h +++ b/block_int.h @@ -119,8 +119,11 @@ struct BlockDriver { QEMUOptionParameter *create_options; - /* Returns number of errors in image, -errno for internal errors */ - int (*bdrv_check)(BlockDriverState* bs); + /* + * Returns 0 for completed check, -errno for internal errors. + * The check results are stored in result. + */ + int (*bdrv_check)(BlockDriverState* bs, BdrvCheckResult *result); void (*bdrv_debug_event)(BlockDriverState *bs, BlkDebugEvent event); |