Add an Error ** parameter to bdrv_create and its associated functions to
allow more specific error messages.
Signed-off-by: Max Reitz <mre...@redhat.com>
---
block.c | 72 +++++++++++++++++++++++++++++++++------------------
block/cow.c | 2 +-
block/qcow.c | 2 +-
block/qcow2.c | 2 +-
block/qed.c | 2 +-
block/raw_bsd.c | 2 +-
block/vvfat.c | 2 +-
include/block/block.h | 5 ++--
qemu-img.c | 16 ++++--------
9 files changed, 61 insertions(+), 44 deletions(-)
diff --git a/block.c b/block.c
index 8da32b2..d734265 100644
--- a/block.c
+++ b/block.c
@@ -367,18 +367,26 @@ typedef struct CreateCo {
char *filename;
QEMUOptionParameter *options;
int ret;
+ Error *err;
} CreateCo;
static void coroutine_fn bdrv_create_co_entry(void *opaque)
{
+ Error *local_err = NULL;
+ int ret;
+
CreateCo *cco = opaque;
assert(cco->drv);
- cco->ret = cco->drv->bdrv_create(cco->filename, cco->options, NULL);
+ ret = cco->drv->bdrv_create(cco->filename, cco->options, &local_err);
+ if (error_is_set(&local_err)) {
+ error_propagate(&cco->err, local_err);
+ }
+ cco->ret = ret;
}
int bdrv_create(BlockDriver *drv, const char* filename,
- QEMUOptionParameter *options)
+ QEMUOptionParameter *options, Error **errp)
{
int ret;
@@ -388,9 +396,11 @@ int bdrv_create(BlockDriver *drv, const char* filename,
.filename = g_strdup(filename),
.options = options,
.ret = NOT_DONE,
+ .err = NULL,
};
if (!drv->bdrv_create) {
+ error_setg(errp, "Driver '%s' does not support image creation",
drv->format_name);
ret = -ENOTSUP;
goto out;
}
@@ -407,22 +417,37 @@ int bdrv_create(BlockDriver *drv, const char* filename,
}
ret = cco.ret;
+ if (ret < 0) {
+ if (error_is_set(&cco.err)) {
+ error_propagate(errp, cco.err);
+ } else {
+ error_setg_errno(errp, -ret, "Could not create image");
+ }
+ }
out:
g_free(cco.filename);
return ret;
}
-int bdrv_create_file(const char* filename, QEMUOptionParameter *options)
+int bdrv_create_file(const char* filename, QEMUOptionParameter *options,
+ Error **errp)
{
BlockDriver *drv;
+ Error *local_err = NULL;
+ int ret;
drv = bdrv_find_protocol(filename, true);
if (drv == NULL) {
+ error_setg(errp, "Could not find protocol for file '%s'", filename);
return -ENOENT;
}
- return bdrv_create(drv, filename, options);
+ ret = bdrv_create(drv, filename, options, &local_err);
+ if (error_is_set(&local_err)) {
+ error_propagate(errp, local_err);
+ }
+ return ret;
}
/*
@@ -1053,11 +1078,9 @@ int bdrv_open(BlockDriverState *bs, const char
*filename, QDict *options,
drv->format_name);
}
- ret = bdrv_create(bdrv_qcow2, tmp_filename, create_options);
+ ret = bdrv_create(bdrv_qcow2, tmp_filename, create_options,
&local_err);
free_option_parameters(create_options);
if (ret < 0) {
- error_setg_errno(errp, -ret, "Could not create temporary overlay "
- "'%s'", tmp_filename);
goto fail;
}
@@ -4553,6 +4576,7 @@ void bdrv_img_create(const char *filename, const char
*fmt,
BlockDriverState *bs = NULL;
BlockDriver *drv, *proto_drv;
BlockDriver *backing_drv = NULL;
+ Error *local_err = NULL;
int ret = 0;
/* Find driver and parse its options */
@@ -4639,10 +4663,8 @@ void bdrv_img_create(const char *filename, const char
*fmt,
bs = bdrv_new("");
ret = bdrv_open(bs, backing_file->value.s, NULL, back_flags,
- backing_drv, NULL);
+ backing_drv, &local_err);
if (ret < 0) {
- error_setg_errno(errp, -ret, "Could not open '%s'",
- backing_file->value.s);
goto out;
}
bdrv_get_geometry(bs, &size);
@@ -4661,22 +4683,19 @@ void bdrv_img_create(const char *filename, const char
*fmt,
print_option_parameters(param);
puts("");
}
- ret = bdrv_create(drv, filename, param);
- if (ret < 0) {
- if (ret == -ENOTSUP) {
- error_setg(errp,"Formatting or formatting option not supported for
"
- "file format '%s'", fmt);
- } else if (ret == -EFBIG) {
- const char *cluster_size_hint = "";
- if (get_option_parameter(create_options, BLOCK_OPT_CLUSTER_SIZE)) {
- cluster_size_hint = " (try using a larger cluster size)";
- }
- error_setg(errp, "The image size is too large for file format
'%s'%s",
- fmt, cluster_size_hint);
- } else {
- error_setg(errp, "%s: error while creating %s: %s", filename, fmt,
- strerror(-ret));
+ ret = bdrv_create(drv, filename, param, &local_err);
+ if (ret == -EFBIG) {
+ /* This is generally a better message than whatever the driver would
+ * deliver (especially because of the cluster_size_hint), since that
+ * is most probably not much different from "image too large". */
+ const char *cluster_size_hint = "";
+ if (get_option_parameter(create_options, BLOCK_OPT_CLUSTER_SIZE)) {
+ cluster_size_hint = " (try using a larger cluster size)";
}
+ error_setg(errp, "The image size is too large for file format '%s'"
+ "%s", fmt, cluster_size_hint);
+ error_free(local_err);
+ local_err = NULL;
}
out:
@@ -4686,6 +4705,9 @@ out:
if (bs) {
bdrv_delete(bs);
}
+ if (error_is_set(&local_err)) {
+ error_propagate(errp, local_err);
+ }
}
AioContext *bdrv_get_aio_context(BlockDriverState *bs)
diff --git a/block/cow.c b/block/cow.c
index f890db0..1c12996 100644
--- a/block/cow.c
+++ b/block/cow.c
@@ -276,7 +276,7 @@ static int cow_create(const char *filename,
QEMUOptionParameter *options,
options++;
}
- ret = bdrv_create_file(filename, options);
+ ret = bdrv_create_file(filename, options, NULL);
if (ret < 0) {
return ret;
}
diff --git a/block/qcow.c b/block/qcow.c
index ab3f1ab..50c6657 100644
--- a/block/qcow.c
+++ b/block/qcow.c
@@ -676,7 +676,7 @@ static int qcow_create(const char *filename,
QEMUOptionParameter *options,
options++;
}
- ret = bdrv_create_file(filename, options);
+ ret = bdrv_create_file(filename, options, NULL);
if (ret < 0) {
return ret;
}
diff --git a/block/qcow2.c b/block/qcow2.c
index 8692931..e16d352 100644
--- a/block/qcow2.c
+++ b/block/qcow2.c
@@ -1354,7 +1354,7 @@ static int qcow2_create2(const char *filename, int64_t
total_size,
uint8_t* refcount_table;
int ret;
- ret = bdrv_create_file(filename, options);
+ ret = bdrv_create_file(filename, options, NULL);
if (ret < 0) {
return ret;
}
diff --git a/block/qed.c b/block/qed.c
index ba1f9d8..3552daf 100644
--- a/block/qed.c
+++ b/block/qed.c
@@ -554,7 +554,7 @@ static int qed_create(const char *filename, uint32_t
cluster_size,
int ret = 0;
BlockDriverState *bs = NULL;
- ret = bdrv_create_file(filename, NULL);
+ ret = bdrv_create_file(filename, NULL, NULL);
if (ret < 0) {
return ret;
}
diff --git a/block/raw_bsd.c b/block/raw_bsd.c
index 793121a..0f1b677 100644
--- a/block/raw_bsd.c
+++ b/block/raw_bsd.c
@@ -133,7 +133,7 @@ static int raw_has_zero_init(BlockDriverState *bs)
static int raw_create(const char *filename, QEMUOptionParameter *options,
Error **errp)
{
- return bdrv_create_file(filename, options);
+ return bdrv_create_file(filename, options, NULL);
}
static int raw_open(BlockDriverState *bs, QDict *options, int flags,
diff --git a/block/vvfat.c b/block/vvfat.c
index 76a30a5..65e5bd0 100644
--- a/block/vvfat.c
+++ b/block/vvfat.c
@@ -2926,7 +2926,7 @@ static int enable_write_target(BDRVVVFATState *s)
set_option_parameter_int(options, BLOCK_OPT_SIZE, s->sector_count * 512);
set_option_parameter(options, BLOCK_OPT_BACKING_FILE, "fat:");
- ret = bdrv_create(bdrv_qcow, s->qcow_filename, options);
+ ret = bdrv_create(bdrv_qcow, s->qcow_filename, options, NULL);
if (ret < 0) {
goto err;
}
diff --git a/include/block/block.h b/include/block/block.h
index efafd7a..15e226d 100644
--- a/include/block/block.h
+++ b/include/block/block.h
@@ -117,8 +117,9 @@ BlockDriver *bdrv_find_format(const char *format_name);
BlockDriver *bdrv_find_whitelisted_format(const char *format_name,
bool readonly);
int bdrv_create(BlockDriver *drv, const char* filename,
- QEMUOptionParameter *options);
-int bdrv_create_file(const char* filename, QEMUOptionParameter *options);
+ QEMUOptionParameter *options, Error **errp);
+int bdrv_create_file(const char* filename, QEMUOptionParameter *options,
+ Error **errp);
BlockDriverState *bdrv_new(const char *device_name);
void bdrv_make_anon(BlockDriverState *bs);
void bdrv_swap(BlockDriverState *bs_new, BlockDriverState *bs_old);
diff --git a/qemu-img.c b/qemu-img.c
index 607981e..a0c400b 100644
--- a/qemu-img.c
+++ b/qemu-img.c
@@ -1136,6 +1136,7 @@ static int img_convert(int argc, char **argv)
float local_progress = 0;
int min_sparse = 8; /* Need at least 4k of zeros for sparse detection */
bool quiet = false;
+ Error *local_err = NULL;
fmt = NULL;
out_fmt = "raw";
@@ -1333,18 +1334,11 @@ static int img_convert(int argc, char **argv)
}
/* Create the new image */
- ret = bdrv_create(drv, out_filename, param);
+ ret = bdrv_create(drv, out_filename, param, &local_err);
if (ret < 0) {
- if (ret == -ENOTSUP) {
- error_report("Formatting not supported for file format '%s'",
- out_fmt);
- } else if (ret == -EFBIG) {
- error_report("The image size is too large for file format '%s'",
- out_fmt);
- } else {
- error_report("%s: error while converting %s: %s",
- out_filename, out_fmt, strerror(-ret));
- }
+ error_report("%s: error while converting %s: %s",
+ out_filename, out_fmt, error_get_pretty(local_err));
+ error_free(local_err);
goto out;
}
--
1.8.3.1
