[libvirt PATCH v2 07/16] qemu: use file cache for nbdkit caps

[Jonathon Jongsma <jjongsma@xxxxxxxxxx>]

Switch to using the virFileCache implementation for nbdkit capabilities
so that we have persistent caching and re-load capabilities whenever
something changes.

Signed-off-by: Jonathon Jongsma <jjongsma@xxxxxxxxxx>
---
 src/qemu/qemu_conf.h   |  2 +-
 src/qemu/qemu_driver.c |  2 +-
 src/qemu/qemu_nbdkit.c | 24 ------------------------
 src/qemu/qemu_nbdkit.h |  2 --
 4 files changed, 2 insertions(+), 28 deletions(-)

diff --git a/src/qemu/qemu_conf.h b/src/qemu/qemu_conf.h
index d05c715400..414bcfb8a2 100644
--- a/src/qemu/qemu_conf.h
+++ b/src/qemu/qemu_conf.h
@@ -308,7 +308,7 @@ struct _virQEMUDriver {
     /* Immutable pointer, self-locking APIs */
     virHashAtomic *migrationErrors;
 
-    qemuNbdkitCaps *nbdkitCaps;
+    virFileCache *nbdkitCapsCache;
 };
 
 virQEMUDriverConfig *virQEMUDriverConfigNew(bool privileged,
diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index 943fa8621d..dce3ba1a32 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -833,7 +833,7 @@ qemuStateInitialize(bool privileged,
         goto error;
 
     /* find whether nbdkit is available and query its capabilities */
-    qemu_driver->nbdkitCaps = qemuQueryNbdkitCaps();
+    qemu_driver->nbdkitCapsCache = qemuNbdkitCapsCacheNew(cfg->cacheDir);
 
     /* If hugetlbfs is present, then we need to create a sub-directory within
      * it, since we can't assume the root mount point has permissions that
diff --git a/src/qemu/qemu_nbdkit.c b/src/qemu/qemu_nbdkit.c
index ac498b948c..fc83f80f1f 100644
--- a/src/qemu/qemu_nbdkit.c
+++ b/src/qemu/qemu_nbdkit.c
@@ -225,30 +225,6 @@ qemuNbdkitCapsQuery(qemuNbdkitCaps *caps)
 }
 
 
-qemuNbdkitCaps *
-qemuQueryNbdkitCaps(void)
-{
-    qemuNbdkitCaps *caps = NULL;
-    g_autofree char *path = virFindFileInPath("nbdkit");
-
-    if (!path)
-        return NULL;
-
-    if (!virFileIsExecutable(path)) {
-        virReportError(VIR_ERR_INTERNAL_ERROR, _("nbdkit '%s' is not executable"),
-                       path);
-        return NULL;
-    }
-
-    VIR_DEBUG("found nbdkit executable '%s'", path);
-
-    caps = qemuNbdkitCapsNew(path);
-    qemuNbdkitCapsQuery(caps);
-
-    return caps;
-}
-
-
 bool
 qemuNbdkitCapsGet(qemuNbdkitCaps *nbdkitCaps,
                   qemuNbdkitCapsFlags flag)
diff --git a/src/qemu/qemu_nbdkit.h b/src/qemu/qemu_nbdkit.h
index b65e76895b..3e34403d90 100644
--- a/src/qemu/qemu_nbdkit.h
+++ b/src/qemu/qemu_nbdkit.h
@@ -40,8 +40,6 @@ typedef enum {
 
 VIR_ENUM_DECL(qemuNbdkitCaps);
 
-qemuNbdkitCaps* qemuQueryNbdkitCaps(void);
-
 qemuNbdkitCaps* qemuNbdkitCapsNew(const char *path);
 
 virFileCache* qemuNbdkitCapsCacheNew(const char *cachedir);
-- 
2.37.1