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author | jhb <jhb@FreeBSD.org> | 2016-04-27 16:33:17 +0000 |
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committer | jhb <jhb@FreeBSD.org> | 2016-04-27 16:33:17 +0000 |
commit | eb8279b76064de06310530338834d34a265edd1c (patch) | |
tree | 9d890003db3954532ce3e8f39ed0184a8e9983dc /sys/kern/subr_bus.c | |
parent | c97e88d8d27379822b48e87c286771f02ec6230b (diff) | |
download | FreeBSD-src-eb8279b76064de06310530338834d34a265edd1c.zip FreeBSD-src-eb8279b76064de06310530338834d34a265edd1c.tar.gz |
Add 'devctl delete' that calls device_delete_child().
'devctl delete' can be used to delete a device that is no longer present.
As an anti-foot-shooting measure, 'delete' will not delete a device
unless it's parent bus says it is no longer present. This can be
overridden by passing the force ('-f') flag.
Note that this command should be used with care. If a device is deleted
that is actually present it can't be resurrected unless the parent bus
device's driver supports rescans.
Differential Revision: https://reviews.freebsd.org/D6019
Diffstat (limited to 'sys/kern/subr_bus.c')
-rw-r--r-- | sys/kern/subr_bus.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/sys/kern/subr_bus.c b/sys/kern/subr_bus.c index d9c2ac1..968cb99 100644 --- a/sys/kern/subr_bus.c +++ b/sys/kern/subr_bus.c @@ -5204,6 +5204,7 @@ devctl2_ioctl(struct cdev *cdev, u_long cmd, caddr_t data, int fflag, case DEV_RESUME: case DEV_SET_DRIVER: case DEV_RESCAN: + case DEV_DELETE: error = priv_check(td, PRIV_DRIVER); if (error == 0) error = find_device(req, &dev); @@ -5374,6 +5375,24 @@ devctl2_ioctl(struct cdev *cdev, u_long cmd, caddr_t data, int fflag, } error = BUS_RESCAN(dev); break; + case DEV_DELETE: { + device_t parent; + + parent = device_get_parent(dev); + if (parent == NULL) { + error = EINVAL; + break; + } + if (!(req->dr_flags & DEVF_FORCE_DELETE)) { + if (bus_child_present(dev) != 0) { + error = EBUSY; + break; + } + } + + error = device_delete_child(parent, dev); + break; + } } mtx_unlock(&Giant); return (error); |