From: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
To: qemu-block@nongnu.org
Cc: qemu-devel@nongnu.org, mreitz@redhat.com, kwolf@redhat.com,
vsementsov@virtuozzo.com, den@openvz.org, ktkhai@virtuozzo.com,
eblake@redhat.com, berto@igalia.com
Subject: [PATCH v2 08/10] qcow2-refcount: improve style of check_refcounts_l1()
Date: Wed, 5 May 2021 09:59:53 +0300 [thread overview]
Message-ID: <20210505065955.13964-9-vsementsov@virtuozzo.com> (raw)
In-Reply-To: <20210505065955.13964-1-vsementsov@virtuozzo.com>
- use g_autofree for l1_table
- better name for size in bytes variable
- reduce code blocks nesting
- whitespaces, braces, newlines
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
---
block/qcow2-refcount.c | 98 +++++++++++++++++++++---------------------
1 file changed, 50 insertions(+), 48 deletions(-)
diff --git a/block/qcow2-refcount.c b/block/qcow2-refcount.c
index 47cc82449b..69294a94fe 100644
--- a/block/qcow2-refcount.c
+++ b/block/qcow2-refcount.c
@@ -1864,71 +1864,73 @@ static int check_refcounts_l1(BlockDriverState *bs,
int flags, BdrvCheckMode fix, bool active)
{
BDRVQcow2State *s = bs->opaque;
- uint64_t *l1_table = NULL, l2_offset, l1_size2;
+ size_t l1_size_bytes = l1_size * L1E_SIZE;
+ g_autofree uint64_t *l1_table = NULL;
+ uint64_t l2_offset;
int i, ret;
- l1_size2 = l1_size * L1E_SIZE;
+ if (!l1_size) {
+ return 0;
+ }
/* Mark L1 table as used */
ret = qcow2_inc_refcounts_imrt(bs, res, refcount_table, refcount_table_size,
- l1_table_offset, l1_size2);
+ l1_table_offset, l1_size_bytes);
if (ret < 0) {
- goto fail;
+ return ret;
+ }
+
+ l1_table = g_try_malloc(l1_size_bytes);
+ if (l1_table == NULL) {
+ res->check_errors++;
+ return -ENOMEM;
}
/* Read L1 table entries from disk */
- if (l1_size2 > 0) {
- l1_table = g_try_malloc(l1_size2);
- if (l1_table == NULL) {
- ret = -ENOMEM;
- res->check_errors++;
- goto fail;
- }
- ret = bdrv_pread(bs->file, l1_table_offset, l1_table, l1_size2);
- if (ret < 0) {
- fprintf(stderr, "ERROR: I/O error in check_refcounts_l1\n");
- res->check_errors++;
- goto fail;
- }
- for(i = 0;i < l1_size; i++)
- be64_to_cpus(&l1_table[i]);
+ ret = bdrv_pread(bs->file, l1_table_offset, l1_table, l1_size_bytes);
+ if (ret < 0) {
+ fprintf(stderr, "ERROR: I/O error in check_refcounts_l1\n");
+ res->check_errors++;
+ return ret;
+ }
+
+ for (i = 0; i < l1_size; i++) {
+ be64_to_cpus(&l1_table[i]);
}
/* Do the actual checks */
- for(i = 0; i < l1_size; i++) {
- l2_offset = l1_table[i];
- if (l2_offset) {
- /* Mark L2 table as used */
- l2_offset &= L1E_OFFSET_MASK;
- ret = qcow2_inc_refcounts_imrt(bs, res,
- refcount_table, refcount_table_size,
- l2_offset, s->cluster_size);
- if (ret < 0) {
- goto fail;
- }
+ for (i = 0; i < l1_size; i++) {
+ if (!l1_table[i]) {
+ continue;
+ }
- /* L2 tables are cluster aligned */
- if (offset_into_cluster(s, l2_offset)) {
- fprintf(stderr, "ERROR l2_offset=%" PRIx64 ": Table is not "
- "cluster aligned; L1 entry corrupted\n", l2_offset);
- res->corruptions++;
- }
+ l2_offset = l1_table[i] & L1E_OFFSET_MASK;
- /* Process and check L2 entries */
- ret = check_refcounts_l2(bs, res, refcount_table,
- refcount_table_size, l2_offset, flags,
- fix, active);
- if (ret < 0) {
- goto fail;
- }
+ /* Mark L2 table as used */
+ ret = qcow2_inc_refcounts_imrt(bs, res,
+ refcount_table, refcount_table_size,
+ l2_offset, s->cluster_size);
+ if (ret < 0) {
+ return ret;
+ }
+
+ /* L2 tables are cluster aligned */
+ if (offset_into_cluster(s, l2_offset)) {
+ fprintf(stderr, "ERROR l2_offset=%" PRIx64 ": Table is not "
+ "cluster aligned; L1 entry corrupted\n", l2_offset);
+ res->corruptions++;
+ }
+
+ /* Process and check L2 entries */
+ ret = check_refcounts_l2(bs, res, refcount_table,
+ refcount_table_size, l2_offset, flags,
+ fix, active);
+ if (ret < 0) {
+ return ret;
}
}
- g_free(l1_table);
- return 0;
-fail:
- g_free(l1_table);
- return ret;
+ return 0;
}
/*
--
2.29.2
next prev parent reply other threads:[~2021-05-05 7:08 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-05 6:59 [PATCH v2 00/10] qcow2 check: check some reserved bits and subcluster bitmaps Vladimir Sementsov-Ogievskiy
2021-05-05 6:59 ` [PATCH v2 01/10] qcow2-refcount: improve style of check_refcounts_l2() Vladimir Sementsov-Ogievskiy
2021-05-05 6:59 ` [PATCH v2 02/10] qcow2: compressed read: simplify cluster descriptor passing Vladimir Sementsov-Ogievskiy
2021-05-10 15:36 ` Alberto Garcia
2021-05-05 6:59 ` [PATCH v2 03/10] qcow2: introduce qcow2_parse_compressed_l2_entry() helper Vladimir Sementsov-Ogievskiy
2021-05-05 6:59 ` [PATCH v2 04/10] qcow2-refcount: introduce fix_l2_entry_by_zero() Vladimir Sementsov-Ogievskiy
2021-05-05 6:59 ` [PATCH v2 05/10] qcow2-refcount: fix_l2_entry_by_zero(): also zero L2 entry bitmap Vladimir Sementsov-Ogievskiy
2021-05-05 6:59 ` [PATCH v2 06/10] qcow2-refcount: check_refcounts_l2(): check l2_bitmap Vladimir Sementsov-Ogievskiy
2021-05-11 16:49 ` Kirill Tkhai
2021-05-05 6:59 ` [PATCH v2 07/10] qcow2-refcount: check_refcounts_l2(): check reserved bits Vladimir Sementsov-Ogievskiy
2021-05-11 16:54 ` Kirill Tkhai
2021-05-05 6:59 ` Vladimir Sementsov-Ogievskiy [this message]
2021-05-05 6:59 ` [PATCH v2 09/10] qcow2-refcount: check_refcounts_l1(): " Vladimir Sementsov-Ogievskiy
2021-05-11 16:55 ` Kirill Tkhai
2021-05-05 6:59 ` [PATCH v2 10/10] qcow2-refcount: check_refblocks(): add separate message for reserved Vladimir Sementsov-Ogievskiy
2021-05-11 17:09 ` Kirill Tkhai
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