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diff -up util-linux-2.23.2/include/loopdev.h.kzak util-linux-2.23.2/include/loopdev.h
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--- util-linux-2.23.2/include/loopdev.h.kzak 2013-06-13 09:46:10.397650425 +0200
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+++ util-linux-2.23.2/include/loopdev.h 2014-01-14 11:11:48.427643690 +0100
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@@ -149,6 +149,7 @@ extern void loopcxt_enable_debug(struct
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extern int loopcxt_set_device(struct loopdev_cxt *lc, const char *device)
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__attribute__ ((warn_unused_result));
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extern int loopcxt_has_device(struct loopdev_cxt *lc);
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+extern int loopcxt_add_device(struct loopdev_cxt *lc);
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extern char *loopcxt_strdup_device(struct loopdev_cxt *lc);
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extern const char *loopcxt_get_device(struct loopdev_cxt *lc);
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extern struct sysfs_cxt *loopcxt_get_sysfs(struct loopdev_cxt *lc);
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diff -up util-linux-2.23.2/lib/loopdev.c.kzak util-linux-2.23.2/lib/loopdev.c
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--- util-linux-2.23.2/lib/loopdev.c.kzak 2013-07-30 11:19:20.143600300 +0200
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+++ util-linux-2.23.2/lib/loopdev.c 2014-01-14 11:11:48.428643700 +0100
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@@ -1298,6 +1298,36 @@ int loopcxt_delete_device(struct loopdev
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return 0;
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}
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+int loopcxt_add_device(struct loopdev_cxt *lc)
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+{
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+ int rc = -EINVAL;
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+ int ctl, nr = -1;
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+ const char *p, *dev = loopcxt_get_device(lc);
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+
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+ if (!dev)
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+ goto done;
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+
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+ if (!(lc->flags & LOOPDEV_FL_CONTROL)) {
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+ rc = -ENOSYS;
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+ goto done;
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+ }
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+
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+ p = strrchr(dev, '/');
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+ if (!p || (sscanf(p, "/loop%d", &nr) != 1 && sscanf(p, "/%d", &nr) != 1)
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+ || nr < 0)
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+ goto done;
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+
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+ ctl = open(_PATH_DEV_LOOPCTL, O_RDWR|O_CLOEXEC);
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+ if (ctl >= 0) {
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+ DBG(lc, loopdev_debug("add_device %d", nr));
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+ rc = ioctl(ctl, LOOP_CTL_ADD, nr);
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+ close(ctl);
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+ }
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+done:
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+ DBG(lc, loopdev_debug("add_device done [rc=%d]", rc));
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+ return rc;
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+}
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+
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/*
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* Note that LOOP_CTL_GET_FREE ioctl is supported since kernel 3.1. In older
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* kernels we have to check all loop devices to found unused one.
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diff -up util-linux-2.23.2/sys-utils/losetup.c.kzak util-linux-2.23.2/sys-utils/losetup.c
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--- util-linux-2.23.2/sys-utils/losetup.c.kzak 2013-07-30 11:20:16.987117853 +0200
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+++ util-linux-2.23.2/sys-utils/losetup.c 2014-01-14 11:11:48.428643700 +0100
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@@ -600,6 +600,8 @@ int main(int argc, char **argv)
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{
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int hasdev = loopcxt_has_device(&lc);
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+ if (hasdev && !is_loopdev(loopcxt_get_device(&lc)))
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+ loopcxt_add_device(&lc);
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do {
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const char *errpre;
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