hw/9pfs: Add new virtfs option writeout=immediate skip host page cache
writeout=immediate implies the after pwritev we do a sync_file_range.
Reviewed-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
diff --git a/fsdev/qemu-fsdev.c b/fsdev/qemu-fsdev.c
index 768819f..946bad7 100644
--- a/fsdev/qemu-fsdev.c
+++ b/fsdev/qemu-fsdev.c
@@ -34,6 +34,8 @@
const char *fstype = qemu_opt_get(opts, "fstype");
const char *path = qemu_opt_get(opts, "path");
const char *sec_model = qemu_opt_get(opts, "security_model");
+ const char *writeout = qemu_opt_get(opts, "writeout");
+
if (!fsdev_id) {
fprintf(stderr, "fsdev: No id specified\n");
@@ -72,10 +74,14 @@
fsle->fse.path = g_strdup(path);
fsle->fse.security_model = g_strdup(sec_model);
fsle->fse.ops = FsTypes[i].ops;
-
+ fsle->fse.export_flags = 0;
+ if (writeout) {
+ if (!strcmp(writeout, "immediate")) {
+ fsle->fse.export_flags = V9FS_IMMEDIATE_WRITEOUT;
+ }
+ }
QTAILQ_INSERT_TAIL(&fstype_entries, fsle, next);
return 0;
-
}
FsTypeEntry *get_fsdev_fsentry(char *id)