[Virtio-fs] [PATCH 15/24] DAX: virtiofsd: Perform an unmap on destroy
Dr. David Alan Gilbert (git)
dgilbert at redhat.com
Tue Feb 9 19:02:15 UTC 2021
From: "Dr. David Alan Gilbert" <dgilbert at redhat.com>
Force unmap all remaining dax cache entries on a destroy.
Signed-off-by: Dr. David Alan Gilbert <dgilbert at redhat.com>
---
tools/virtiofsd/passthrough_ll.c | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/tools/virtiofsd/passthrough_ll.c b/tools/virtiofsd/passthrough_ll.c
index badac23fef..21ddb434ae 100644
--- a/tools/virtiofsd/passthrough_ll.c
+++ b/tools/virtiofsd/passthrough_ll.c
@@ -2947,6 +2947,17 @@ static void lo_destroy(void *userdata, struct fuse_session *se)
{
struct lo_data *lo = (struct lo_data *)userdata;
+ if (fuse_lowlevel_is_virtio(se)) {
+ VhostUserFSSlaveMsg msg = { 0 };
+
+ msg.len[0] = ~(uint64_t)0; /* Special: means 'all' */
+ msg.c_offset[0] = 0;
+ if (fuse_virtio_unmap(se, &msg)) {
+ fuse_log(FUSE_LOG_ERR, "%s: unmap during destroy failed\n",
+ __func__);
+ }
+ }
+
pthread_mutex_lock(&lo->mutex);
while (true) {
GHashTableIter iter;
--
2.29.2
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