Re: [libvirt PATCH v3 08/18] qemu: Add qemuNbdkitProcess

An object for storing information about a nbdkit process that is serving a specific virStorageSource. At the moment, this information is just stored in the private data of virStorageSource and not used at all. Future commits will use this data to actually start a nbdkit process. Signed-off-by: Jonathon Jongsma <jjongsma(a)redhat.com&gt; --- src/qemu/qemu_conf.c | 23 ++++++++++++ src/qemu/qemu_conf.h | 3 ++ src/qemu/qemu_domain.c | 31 ++++++++++++++++ src/qemu/qemu_domain.h | 4 +++ src/qemu/qemu_nbdkit.c | 82 ++++++++++++++++++++++++++++++++++++++++++ src/qemu/qemu_nbdkit.h | 26 ++++++++++++++ 6 files changed, 169 insertions(+) diff --git a/src/qemu/qemu_conf.c b/src/qemu/qemu_conf.c index ae5bbcd138..0370429da0 100644 --- a/src/qemu/qemu_conf.c +++ b/src/qemu/qemu_conf.c @@ -1641,3 +1641,26 @@ qemuHugepageMakeBasedir(virQEMUDriver *driver, return 0; } + + +/* + * qemuGetNbdkitCaps: + * @driver: the qemu driver + * + * Gets the capabilities for Nbdkit for the specified driver. These can be used + * to determine whether a particular disk source can be served by nbdkit or + * not. + * + * Returns: a reference to qemuNbdkitCaps or NULL + */ +qemuNbdkitCaps* +qemuGetNbdkitCaps(virQEMUDriver *driver) +{ + if (!driver->nbdkitBinary) + driver->nbdkitBinary = virFindFileInPath("nbdkit"); + + if (driver->nbdkitBinary) + return virFileCacheLookup(driver->nbdkitCapsCache, driver->nbdkitBinary); + + return NULL; +} diff --git a/src/qemu/qemu_conf.h b/src/qemu/qemu_conf.h index 95c05e6888..8b4f6ce669 100644 --- a/src/qemu/qemu_conf.h +++ b/src/qemu/qemu_conf.h @@ -323,6 +323,7 @@ struct _virQEMUDriver { /* Immutable pointer, self-locking APIs */ virFileCache *nbdkitCapsCache; + char *nbdkitBinary;