From 5e385a0e49a520550a83299632be175857b63f19 Mon Sep 17 00:00:00 2001

From: Hanna Reitz <hreitz@redhat.com>

Date: Tue, 5 Apr 2022 15:46:52 +0200

Subject: [PATCH 06/16] qcow2: Add errp to rebuild_refcount_structure()

RH-Author: Hanna Reitz <hreitz@redhat.com>

RH-MergeRequest: 96: qcow2: Improve refcount structure rebuilding

RH-Commit: [3/4] 937b89a7eab6ec6b18618d59bc1526976ad03290 (hreitz/qemu-kvm-c-9-s)

RH-Bugzilla: 2072379

RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>

RH-Acked-by: Eric Blake <eblake@redhat.com>

RH-Acked-by: Stefan Hajnoczi <stefanha@redhat.com>

Instead of fprint()-ing error messages in rebuild_refcount_structure()

and its rebuild_refcounts_write_refblocks() helper, pass them through an

Error object to qcow2_check_refcounts() (which will then print it).

Suggested-by: Eric Blake <eblake@redhat.com>

Signed-off-by: Hanna Reitz <hreitz@redhat.com>

Message-Id: <20220405134652.19278-4-hreitz@redhat.com>

Reviewed-by: Eric Blake <eblake@redhat.com>

(cherry picked from commit 0423f75351ab83b844a31349218b0eadd830e07a)

Signed-off-by: Hanna Reitz <hreitz@redhat.com>

---

 block/qcow2-refcount.c | 33 +++++++++++++++++++--------------

 1 file changed, 19 insertions(+), 14 deletions(-)

diff --git a/block/qcow2-refcount.c b/block/qcow2-refcount.c

index c5669eaa51..ed0ecfaa89 100644

--- a/block/qcow2-refcount.c

+++ b/block/qcow2-refcount.c

@@ -2465,7 +2465,8 @@ static int64_t alloc_clusters_imrt(BlockDriverState *bs,

 static int rebuild_refcounts_write_refblocks(

         BlockDriverState *bs, void **refcount_table, int64_t *nb_clusters,

         int64_t first_cluster, int64_t end_cluster,

-        uint64_t **on_disk_reftable_ptr, uint32_t *on_disk_reftable_entries_ptr

+        uint64_t **on_disk_reftable_ptr, uint32_t *on_disk_reftable_entries_ptr,

+        Error **errp

     )

 {

     BDRVQcow2State *s = bs->opaque;

@@ -2516,8 +2517,8 @@ static int rebuild_refcounts_write_refblocks(

                                                   nb_clusters,

                                                   &first_free_cluster);

             if (refblock_offset < 0) {

-                fprintf(stderr, "ERROR allocating refblock: %s\n",

-                        strerror(-refblock_offset));

+                error_setg_errno(errp, -refblock_offset,

+                                 "ERROR allocating refblock");

                 return refblock_offset;

             }

@@ -2539,6 +2540,7 @@ static int rebuild_refcounts_write_refblocks(

                                   on_disk_reftable_entries *

                                   REFTABLE_ENTRY_SIZE);

                 if (!on_disk_reftable) {

+                    error_setg(errp, "ERROR allocating reftable memory");

                     return -ENOMEM;

                 }

@@ -2562,7 +2564,7 @@ static int rebuild_refcounts_write_refblocks(

         ret = qcow2_pre_write_overlap_check(bs, 0, refblock_offset,

                                             s->cluster_size, false);

         if (ret < 0) {

-            fprintf(stderr, "ERROR writing refblock: %s\n", strerror(-ret));

+            error_setg_errno(errp, -ret, "ERROR writing refblock");

             return ret;

         }

@@ -2578,7 +2580,7 @@ static int rebuild_refcounts_write_refblocks(

         ret = bdrv_pwrite(bs->file, refblock_offset, on_disk_refblock,

                           s->cluster_size);

         if (ret < 0) {

-            fprintf(stderr, "ERROR writing refblock: %s\n", strerror(-ret));

+            error_setg_errno(errp, -ret, "ERROR writing refblock");

             return ret;

         }

@@ -2601,7 +2603,8 @@ static int rebuild_refcounts_write_refblocks(

 static int rebuild_refcount_structure(BlockDriverState *bs,

                                       BdrvCheckResult *res,

                                       void **refcount_table,

-                                      int64_t *nb_clusters)

+                                      int64_t *nb_clusters,

+                                      Error **errp)

 {

     BDRVQcow2State *s = bs->opaque;

     int64_t reftable_offset = -1;

@@ -2652,7 +2655,7 @@ static int rebuild_refcount_structure(BlockDriverState *bs,

         rebuild_refcounts_write_refblocks(bs, refcount_table, nb_clusters,

                                           0, *nb_clusters,

                                           &on_disk_reftable,

-                                          &on_disk_reftable_entries);

+                                          &on_disk_reftable_entries, errp);

     if (reftable_size_changed < 0) {

         res->check_errors++;

         ret = reftable_size_changed;

@@ -2676,8 +2679,8 @@ static int rebuild_refcount_structure(BlockDriverState *bs,

                                               refcount_table, nb_clusters,

                                               &first_free_cluster);

         if (reftable_offset < 0) {

-            fprintf(stderr, "ERROR allocating reftable: %s\n",

-                    strerror(-reftable_offset));

+            error_setg_errno(errp, -reftable_offset,

+                             "ERROR allocating reftable");

             res->check_errors++;

             ret = reftable_offset;

             goto fail;

@@ -2695,7 +2698,7 @@ static int rebuild_refcount_structure(BlockDriverState *bs,

                                               reftable_start_cluster,

                                               reftable_end_cluster,

                                               &on_disk_reftable,

-                                              &on_disk_reftable_entries);

+                                              &on_disk_reftable_entries, errp);

         if (reftable_size_changed < 0) {

             res->check_errors++;

             ret = reftable_size_changed;

@@ -2725,7 +2728,7 @@ static int rebuild_refcount_structure(BlockDriverState *bs,

     ret = qcow2_pre_write_overlap_check(bs, 0, reftable_offset, reftable_length,

                                         false);

     if (ret < 0) {

-        fprintf(stderr, "ERROR writing reftable: %s\n", strerror(-ret));

+        error_setg_errno(errp, -ret, "ERROR writing reftable");

         goto fail;

     }

@@ -2733,7 +2736,7 @@ static int rebuild_refcount_structure(BlockDriverState *bs,

     ret = bdrv_pwrite(bs->file, reftable_offset, on_disk_reftable,

                       reftable_length);

     if (ret < 0) {

-        fprintf(stderr, "ERROR writing reftable: %s\n", strerror(-ret));

+        error_setg_errno(errp, -ret, "ERROR writing reftable");

         goto fail;

     }

@@ -2746,7 +2749,7 @@ static int rebuild_refcount_structure(BlockDriverState *bs,

                            &reftable_offset_and_clusters,

                            sizeof(reftable_offset_and_clusters));

     if (ret < 0) {

-        fprintf(stderr, "ERROR setting reftable: %s\n", strerror(-ret));

+        error_setg_errno(errp, -ret, "ERROR setting reftable");

         goto fail;

     }

@@ -2814,11 +2817,13 @@ int qcow2_check_refcounts(BlockDriverState *bs, BdrvCheckResult *res,

     if (rebuild && (fix & BDRV_FIX_ERRORS)) {

         BdrvCheckResult old_res = *res;

         int fresh_leaks = 0;

+        Error *local_err = NULL;

         fprintf(stderr, "Rebuilding refcount structure\n");

         ret = rebuild_refcount_structure(bs, res, &refcount_table,

-                                         &nb_clusters);

+                                         &nb_clusters, &local_err);

         if (ret < 0) {

+            error_report_err(local_err);

             goto fail;

         }

-- 

2.31.1