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D21299.id60956.diff
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Index: kern/vfs_default.c
===================================================================
--- kern/vfs_default.c
+++ kern/vfs_default.c
@@ -43,6 +43,7 @@
#include <sys/buf.h>
#include <sys/conf.h>
#include <sys/event.h>
+#include <sys/filio.h>
#include <sys/kernel.h>
#include <sys/limits.h>
#include <sys/lock.h>
@@ -86,6 +87,7 @@
static int vop_stdcopy_file_range(struct vop_copy_file_range_args *ap);
static int vop_stdfdatasync(struct vop_fdatasync_args *ap);
static int vop_stdgetpages_async(struct vop_getpages_async_args *ap);
+static int vop_stdioctl(struct vop_ioctl_args *ap);
/*
* This vnode table stores what we want to do if the filesystem doesn't
@@ -118,7 +120,7 @@
.vop_getpages_async = vop_stdgetpages_async,
.vop_getwritemount = vop_stdgetwritemount,
.vop_inactive = VOP_NULL,
- .vop_ioctl = VOP_ENOTTY,
+ .vop_ioctl = vop_stdioctl,
.vop_kqfilter = vop_stdkqfilter,
.vop_islocked = vop_stdislocked,
.vop_lock1 = vop_stdlock,
@@ -1131,6 +1133,41 @@
error = 0;
}
VI_UNLOCK(vp);
+ return (error);
+}
+
+static int
+vop_stdioctl(struct vop_ioctl_args *ap)
+{
+ struct vnode *vp;
+ struct vattr va;
+ off_t *offp;
+ int error;
+
+ switch (ap->a_command) {
+ case FIOSEEKDATA:
+ case FIOSEEKHOLE:
+ vp = ap->a_vp;
+ error = vn_lock(vp, LK_SHARED);
+ if (error != 0)
+ return (EBADF);
+ if (vp->v_type == VREG)
+ error = VOP_GETATTR(vp, &va, ap->a_cred);
+ else
+ error = ENOTTY;
+ if (error == 0) {
+ offp = ap->a_data;
+ if (*offp < 0 || *offp >= va.va_size)
+ error = ENXIO;
+ else if (ap->a_command == FIOSEEKHOLE)
+ *offp = va.va_size;
+ }
+ VOP_UNLOCK(vp, 0);
+ break;
+ default:
+ error = ENOTTY;
+ break;
+ }
return (error);
}

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