[libvirt] [PATCH 1/2] storage: split off code for calling rbd_list
Ján Tomko
jtomko at redhat.com
Mon Mar 18 12:46:02 UTC 2019
On Mon, Mar 18, 2019 at 12:20:17PM +0000, Daniel P. Berrangé wrote:
>The rbd_list method has a quite unpleasant signature returning an
>array of strings in a single buffer instead of an array. It is
>being deprecated in favour of rbd_list2. To maintain clarity of
>code when supporting both APIs in parallel, split the rbd_list
>code out into a separate method.
>
Also change the VIR_WARN to report a proper error.
>Signed-off-by: Daniel P. Berrangé <berrange at redhat.com>
>---
> src/storage/storage_backend_rbd.c | 84 ++++++++++++++++++++++---------
> 1 file changed, 59 insertions(+), 25 deletions(-)
>
>diff --git a/src/storage/storage_backend_rbd.c b/src/storage/storage_backend_rbd.c
>index 3eae780c44..24ddbc8f69 100644
>--- a/src/storage/storage_backend_rbd.c
>+++ b/src/storage/storage_backend_rbd.c
>@@ -565,19 +565,68 @@ volStorageBackendRBDRefreshVolInfo(virStorageVolDefPtr vol,
> return ret;
> }
>
>+
>+static char **
>+virStorageBackendRBDGetVolNames(virStorageBackendRBDStatePtr ptr)
>+{
>+ char **names = NULL;
>+ size_t nnames = 0;
>+ int ret;
We usually use 'ret' for the return value of the current function and
'rc' for the values returned by callees.
>+ size_t max_size = 1024;
>+ VIR_AUTOFREE(char *) namebuf = NULL;
>+ const char *name;
>+
>+ while (true) {
>+ if (VIR_ALLOC_N(namebuf, max_size) < 0)
>+ goto error;
>+
>+ ret = rbd_list(ptr->ioctx, namebuf, &max_size);
>+ if (ret >= 0)
>+ break;
>+ if (ret != -ERANGE) {
>+ virReportSystemError(-ret, "%s", _("Unable to list RBD images"));
>+ goto error;
>+ }
>+ VIR_FREE(namebuf);
>+ }
>+
>+ for (name = namebuf; name < namebuf + max_size;) {
Strange, this line is winking at me.
>+ VIR_AUTOFREE(char *) namedup = NULL;
>+
>+ if (STREQ(name, ""))
>+ break;
>+
>+ if (VIR_STRDUP(namedup, name) < 0)
>+ goto error;
>+
>+ if (VIR_APPEND_ELEMENT(names, nnames, namedup) < 0)
>+ goto error;
>+
>+ name += strlen(name) + 1;
>+ }
>+
[...]
>- for (name = names; name < names + max_size;) {
>+ for (i = 0; names[i] != NULL; i++) {
> VIR_AUTOPTR(virStorageVolDef) vol = NULL;
>
>- if (STREQ(name, ""))
>- break;
>-
> if (VIR_ALLOC(vol) < 0)
> goto cleanup;
>
>- if (VIR_STRDUP(vol->name, name) < 0)
>- goto cleanup;
>-
>- name += strlen(name) + 1;
>+ vol->name = names[i];
>+ names[i] = NULL;
This can be:
VIR_STEAL_PTR(vol->name, names[i]);
>
> r = volStorageBackendRBDRefreshVolInfo(vol, pool, ptr);
>
Reviewed-by: Ján Tomko <jtomko at redhat.com>
Jano
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 488 bytes
Desc: Digital signature
URL: <http://listman.redhat.com/archives/libvir-list/attachments/20190318/2afecd9e/attachment-0001.sig>
More information about the libvir-list
mailing list