[libvirt] [PATCH 5/6] qemu: Allow suppressing errors from qemuStorageLimitsRefresh

[Peter Krempa]

qemuStorageLimitsRefresh uses qemuDomainStorageOpenStat internally and
there are callers which don't care about the error. Propagate the
skipInaccessible flag so that we can log less errors.

Callers currently don't care about the return value change.

Signed-off-by: Peter Krempa <pkrempa at redhat.com>
---
 src/qemu/qemu_driver.c | 20 +++++++++++++-------
 1 file changed, 13 insertions(+), 7 deletions(-)

diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index 2dffef9642..243a8ac4cf 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -12363,6 +12363,7 @@ qemuDomainStorageUpdatePhysical(virQEMUDriverPtr driver,
  * @cfg: driver configuration data
  * @vm: domain object
  * @src: storage source data
+ * @skipInaccessible: Suppress reporting of common errors when accessing @src
  *
  * Refresh the capacity and allocation limits of a given storage source.
  *
@@ -12384,22 +12385,27 @@ qemuDomainStorageUpdatePhysical(virQEMUDriverPtr driver,
  * is sparse, but the amount of sparseness changes due to writes or
  * punching holes), and physical size of a non-raw file can change.
  *
- * Returns 0 on success, -1 on failure
+ * Returns 1 if @src was successfully updated, 0 if @src can't be opened and
+ * @skipInaccessible is true (no errors are reported) or -1 otherwise (errors
+ * are reported).
  */
 static int
 qemuStorageLimitsRefresh(virQEMUDriverPtr driver,
                          virQEMUDriverConfigPtr cfg,
                          virDomainObjPtr vm,
-                         virStorageSourcePtr src)
+                         virStorageSourcePtr src,
+                         bool skipInaccessible)
 {
+    int rc;
     int ret = -1;
     int fd = -1;
     struct stat sb;
     char *buf = NULL;
     ssize_t len;

-    if (qemuDomainStorageOpenStat(driver, cfg, vm, src, &fd, &sb, false) < 0)
-        goto cleanup;
+    if ((rc = qemuDomainStorageOpenStat(driver, cfg, vm, src, &fd, &sb,
+                                        skipInaccessible)) <= 0)
+        return rc;

     if (virStorageSourceIsLocalStorage(src)) {
         if ((len = virFileReadHeaderFD(fd, VIR_STORAGE_MAX_HEADER, &buf)) < 0) {
@@ -12427,7 +12433,7 @@ qemuStorageLimitsRefresh(virQEMUDriverPtr driver,
         S_ISBLK(sb.st_mode))
         src->allocation = 0;

-    ret = 0;
+    ret = 1;

  cleanup:
     VIR_FREE(buf);
@@ -12477,7 +12483,7 @@ qemuDomainGetBlockInfo(virDomainPtr dom,

     /* for inactive domains we have to peek into the files */
     if (!virDomainObjIsActive(vm)) {
-        if ((qemuStorageLimitsRefresh(driver, cfg, vm, disk->src)) < 0)
+        if ((qemuStorageLimitsRefresh(driver, cfg, vm, disk->src, false)) < 0)
             goto endjob;

         info->capacity = disk->src->capacity;
@@ -21295,7 +21301,7 @@ qemuDomainGetStatsOneBlockFallback(virQEMUDriverPtr driver,
     if (virStorageSourceIsEmpty(src))
         return 0;

-    if (qemuStorageLimitsRefresh(driver, cfg, dom, src) < 0) {
+    if (qemuStorageLimitsRefresh(driver, cfg, dom, src, false) < 0) {
         virResetLastError();
         return 0;
     }
-- 
2.21.0