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diff --git a/sbin/mount_fusefs/mount_fusefs.c b/sbin/mount_fusefs/mount_fusefs.c
--- a/sbin/mount_fusefs/mount_fusefs.c
+++ b/sbin/mount_fusefs/mount_fusefs.c
@@ -84,6 +84,8 @@
{ "automounted", 0, ALTF_AUTOMOUNTED, 1 },
#define ALTF_INTR 0x200
{ "intr", 0, ALTF_INTR, 1 },
+ #define ALTF_AUTOUNMOUNT 0x400
+ { "auto_unmount", 0, ALTF_AUTOUNMOUNT, 1 },
/* Linux specific options, we silently ignore them */
{ "fd=", 0, 0x00, 1 },
{ "rootmode=", 0, 0x00, 1 },
diff --git a/sys/fs/fuse/fuse_device.c b/sys/fs/fuse/fuse_device.c
--- a/sys/fs/fuse/fuse_device.c
+++ b/sys/fs/fuse/fuse_device.c
@@ -65,7 +65,6 @@
#include <sys/module.h>
#include <sys/systm.h>
#include <sys/errno.h>
-#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/conf.h>
#include <sys/uio.h>
@@ -177,6 +176,11 @@
fuse_lck_mtx_unlock(fdata->ms_mtx);
FUSE_UNLOCK();
+ if (fdata->mp && fdata->dataflags & FSESS_AUTO_UNMOUNT) {
+ vfs_ref(fdata->mp);
+ dounmount(fdata->mp, MNT_FORCE, curthread);
+ }
+
fdata_trydestroy(fdata);
}
diff --git a/sys/fs/fuse/fuse_ipc.h b/sys/fs/fuse/fuse_ipc.h
--- a/sys/fs/fuse/fuse_ipc.h
+++ b/sys/fs/fuse/fuse_ipc.h
@@ -240,9 +240,10 @@
#define FSESS_WARN_READLINK_EMBEDDED_NUL 0x1000000 /* corrupt READLINK output */
#define FSESS_WARN_DOT_LOOKUP 0x2000000 /* Inconsistent . LOOKUP response */
#define FSESS_WARN_INODE_MISMATCH 0x4000000 /* ino != nodeid */
+#define FSESS_AUTO_UNMOUNT 0x8000000 /* perform unmount when server dies */
#define FSESS_MNTOPTS_MASK ( \
FSESS_DAEMON_CAN_SPY | FSESS_PUSH_SYMLINKS_IN | \
- FSESS_DEFAULT_PERMISSIONS | FSESS_INTR)
+ FSESS_DEFAULT_PERMISSIONS | FSESS_INTR | FSESS_AUTO_UNMOUNT)
extern int fuse_data_cache_mode;
diff --git a/sys/fs/fuse/fuse_vfsops.c b/sys/fs/fuse/fuse_vfsops.c
--- a/sys/fs/fuse/fuse_vfsops.c
+++ b/sys/fs/fuse/fuse_vfsops.c
@@ -337,6 +337,7 @@
FUSE_FLAGOPT(push_symlinks_in, FSESS_PUSH_SYMLINKS_IN);
FUSE_FLAGOPT(default_permissions, FSESS_DEFAULT_PERMISSIONS);
FUSE_FLAGOPT(intr, FSESS_INTR);
+ FUSE_FLAGOPT(auto_unmount, FSESS_AUTO_UNMOUNT);
(void)vfs_scanopt(opts, "max_read=", "%u", &max_read);
(void)vfs_scanopt(opts, "linux_errnos", "%d", &linux_errnos);

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