Kyle Evans c83651445b tun(4): Don't allow open of open or dying devices ... Previously, a pid check was used to prevent open of the tun(4); this works, but may not make the most sense as we don't prevent the owner process from opening the tun device multiple times. The potential race described near tun_pid should not be an issue: if a tun(4) is to be handed off, its fd has to have been sent via control message or some other mechanism that duplicates the fd to the receiving process so that it may set the pid. Otherwise, the pid gets cleared when the original process closes it and you have no effective handoff mechanism. Close up another potential issue with handing a tun(4) off by not clobbering state if the closer isn't the controller anymore. If we want some state to be cleared, we should do that a little more surgically. Additionally, nothing prevents a dying tun(4) from being "reopened" in the middle of tun_destroy as soon as the mutex is unlocked, quickly leading to a bad time. Return EBUSY if we're marked for destruction, as well, and the consumer will need to deal with it. The associated character device will be destroyed in short order. MFC after: 2 weeks Differential Revision: https://reviews.freebsd.org/D20033		2019-04-25 13:46:12 +00:00
..
altq	Reduce the time it takes the kernel to install a new PF config containing a large number of queues	2019-02-11 05:17:31 +00:00
bpf_buffer.c	sys: further adoption of SPDX licensing ID tags.	2017-11-20 19:43:44 +00:00
bpf_buffer.h	sys: general adoption of SPDX licensing ID tags.	2017-11-27 15:23:17 +00:00
bpf_filter.c	sys: further adoption of SPDX licensing ID tags.	2017-11-20 19:43:44 +00:00
bpf_jitter.c	Make UMA and malloc(9) return non-executable memory in most cases.	2018-06-13 17:04:41 +00:00
bpf_jitter.h	Make UMA and malloc(9) return non-executable memory in most cases.	2018-06-13 17:04:41 +00:00
bpf_zerocopy.c	sys: general adoption of SPDX licensing ID tags.	2017-11-27 15:23:17 +00:00
bpf_zerocopy.h	sys: general adoption of SPDX licensing ID tags.	2017-11-27 15:23:17 +00:00
bpf.c	Convert allocation of bpf_if in bpfattach2 from M_NOWAIT to M_WAITOK	2019-03-19 10:29:32 +00:00
bpf.h	sys: further adoption of SPDX licensing ID tags.	2017-11-20 19:43:44 +00:00
bpfdesc.h	Move BPFIF_* macro definitions into .c file, where struct bpf_if is	2018-06-19 10:34:45 +00:00
bridgestp.c	bridge: Fix panic if the STP root is removed	2019-03-15 11:21:20 +00:00
bridgestp.h	sys: general adoption of SPDX licensing ID tags.	2017-11-27 15:23:17 +00:00
dlt.h	Re-apply r190640.	2018-05-31 09:11:21 +00:00
ethernet.h	net: adjust randomized address bits	2019-04-17 17:18:43 +00:00
firewire.h	sys: general adoption of SPDX licensing ID tags.	2017-11-27 15:23:17 +00:00
ieee8023ad_lacp.c	if_media: Add new 2.5G/5G/25G/40G/50G/100G/200G/400G media types	2018-08-22 18:19:56 +00:00
ieee8023ad_lacp.h	sys: general adoption of SPDX licensing ID tags.	2017-11-27 15:23:17 +00:00
ieee_oui.h	net: adjust randomized address bits	2019-04-17 17:18:43 +00:00
if_arp.h	Improve ARP logging.	2019-03-09 01:12:59 +00:00
if_bridge.c	net: adjust randomized address bits	2019-04-17 17:18:43 +00:00
if_bridgevar.h	Allow different bridge types to coexist	2018-05-11 05:00:40 +00:00
if_clone.c	Use the new VNET_DEFINE_STATIC macro when we are defining static VNET	2018-07-24 16:35:52 +00:00
if_clone.h	iflib(9): Add support for cloning pseudo interfaces	2018-05-11 20:08:28 +00:00
if_dead.c	sys: general adoption of SPDX licensing ID tags.	2017-11-27 15:23:17 +00:00
if_debug.c	sys: general adoption of SPDX licensing ID tags.	2017-11-27 15:23:17 +00:00
if_disc.c	Use the new VNET_DEFINE_STATIC macro when we are defining static VNET	2018-07-24 16:35:52 +00:00
if_dl.h	sys: further adoption of SPDX licensing ID tags.	2017-11-20 19:43:44 +00:00
if_edsc.c	Use the new VNET_DEFINE_STATIC macro when we are defining static VNET	2018-07-24 16:35:52 +00:00
if_enc.c	New pfil(9) KPI together with newborn pfil API and control utility.	2019-01-31 23:01:03 +00:00
if_enc.h	sys: general adoption of SPDX licensing ID tags.	2017-11-27 15:23:17 +00:00
if_epair.c	Use the new VNET_DEFINE_STATIC macro when we are defining static VNET	2018-07-24 16:35:52 +00:00
if_ethersubr.c	net: adjust randomized address bits	2019-04-17 17:18:43 +00:00
if_fwsubr.c	Improve copy-and-pasted versions of SIOCGIFADDR.	2018-03-27 20:51:49 +00:00
if_gif.c	Add handling for appearing/disappearing of ingress addresses to if_gif(4).	2018-10-21 18:06:15 +00:00
if_gif.h	Add handling for appearing/disappearing of ingress addresses to if_gif(4).	2018-10-21 18:06:15 +00:00
if_gre.c	Add GRE-in-UDP encapsulation support as defined in RFC8086.	2019-04-24 09:05:45 +00:00
if_gre.h	Add GRE-in-UDP encapsulation support as defined in RFC8086.	2019-04-24 09:05:45 +00:00
if_ipsec.c	Allow configuration of several ipsec interfaces with the same tunnel	2018-11-16 14:21:57 +00:00
if_ipsec.h
if_lagg.c	Use a dedicated malloc type for lagg(4)'s structures.	2019-03-28 21:00:54 +00:00
if_lagg.h	CK: update consumers to use CK macros across the board	2018-05-24 23:21:23 +00:00
if_llatbl.c	Mechanical cleanup of epoch(9) usage in network stack.	2019-01-09 01:11:19 +00:00
if_llatbl.h	CK: update consumers to use CK macros across the board	2018-05-24 23:21:23 +00:00
if_llc.h	sys: further adoption of SPDX licensing ID tags.	2017-11-20 19:43:44 +00:00
if_loop.c	Use the new VNET_DEFINE_STATIC macro when we are defining static VNET	2018-07-24 16:35:52 +00:00
if_me.c	Add the check that current VNET is ready and access to srchash is allowed.	2018-10-23 13:11:45 +00:00
if_media.c	Finish removing FDDI and tokenring media support.	2018-04-23 21:10:33 +00:00
if_media.h	if_media: Add new 2.5G/5G/25G/40G/50G/100G/200G/400G media types	2018-08-22 18:19:56 +00:00
if_mib.c
if_mib.h
if_pflog.h	sys: general adoption of SPDX licensing ID tags.	2017-11-27 15:23:17 +00:00
if_pfsync.h	sys: general adoption of SPDX licensing ID tags.	2017-11-27 15:23:17 +00:00
if_sppp.h
if_spppfr.c
if_spppsubr.c	Replace read_random(9) with more appropriate arc4rand(9) KPIs	2019-04-04 01:02:50 +00:00
if_stf.c	Do not perform DAD on stf(4) interfaces.	2019-03-30 18:00:44 +00:00
if_tap.c	tun/tap: close race between destroy/ioctl handler	2019-04-25 12:44:08 +00:00
if_tap.h	sys: general adoption of SPDX licensing ID tags.	2017-11-27 15:23:17 +00:00
if_tapvar.h	sys: general adoption of SPDX licensing ID tags.	2017-11-27 15:23:17 +00:00
if_tun.c	tun(4): Don't allow open of open or dying devices	2019-04-25 13:46:12 +00:00
if_tun.h
if_types.h	sys: further adoption of SPDX licensing ID tags.	2017-11-20 19:43:44 +00:00
if_var.h	Track device's NUMA domain in ifnet & alloc ifnet from NUMA local memory	2019-04-22 19:24:21 +00:00
if_vlan_var.h	Add the ability to look up the 3b PCP of a VLAN interface. Use it in	2018-08-16 23:46:38 +00:00
if_vlan.c	This commit adds the missing release mechanism for the	2019-02-13 14:57:59 +00:00
if_vxlan.c	net: adjust randomized address bits	2019-04-17 17:18:43 +00:00
if_vxlan.h	Add support for IPv6 scoped addresses to vxlan	2017-12-30 04:03:53 +00:00
if.c	Track device's NUMA domain in ifnet & alloc ifnet from NUMA local memory	2019-04-22 19:24:21 +00:00
if.h	Plug routing sysctl leaks.	2018-11-26 13:42:18 +00:00
ifdi_if.m	iflib(9): Add support for cloning pseudo interfaces	2018-05-11 20:08:28 +00:00
iflib_clone.c	iflib(9): Add support for cloning pseudo interfaces	2018-05-11 20:08:28 +00:00
iflib_private.h	Use busdma unconditionally in iflib	2018-11-27 20:01:05 +00:00
iflib.c	iflib: Add pfil hooks	2019-04-24 13:32:04 +00:00
iflib.h	iflib: mark isc_driver_version as constant	2019-03-19 23:44:26 +00:00
ifq.h	sys: further adoption of SPDX licensing ID tags.	2017-11-20 19:43:44 +00:00
mp_ring.c	mp_ring: avoid items offset difference between iflib and mp_ring	2019-01-03 23:06:05 +00:00
mp_ring.h	mp_ring: avoid items offset difference between iflib and mp_ring	2019-01-03 23:06:05 +00:00
mppc.h
mppcc.c
mppcd.c
netisr_internal.h	sys: general adoption of SPDX licensing ID tags.	2017-11-27 15:23:17 +00:00
netisr.c	Use the new VNET_DEFINE_STATIC macro when we are defining static VNET	2018-07-24 16:35:52 +00:00
netisr.h	sys: general adoption of SPDX licensing ID tags.	2017-11-27 15:23:17 +00:00
netmap_legacy.h	netmap: add support for multiple host rings	2019-03-18 12:22:23 +00:00
netmap_user.h	netmap: add support for multiple host rings	2019-03-18 12:22:23 +00:00
netmap_virt.h	netmap: align codebase to the current upstream (760279cfb2730a585)	2018-12-05 11:57:16 +00:00
netmap.h	netmap: add support for multiple host rings	2019-03-18 12:22:23 +00:00
paravirt.h
pfil.c	Most Ethernet drivers that potentially can run a pfil(9) hook with	2019-03-10 17:20:09 +00:00
pfil.h	Most Ethernet drivers that potentially can run a pfil(9) hook with	2019-03-10 17:20:09 +00:00
pfkeyv2.h	sys: further adoption of SPDX licensing ID tags.	2017-11-20 19:43:44 +00:00
pfvar.h	pf :Use counter(9) in pf tables.	2019-03-15 11:08:44 +00:00
ppp_defs.h
radix_mpath.c	Switch RIB and RADIX_NODE_HEAD lock from rwlock(9) to rmlock(9).	2018-06-16 08:26:23 +00:00
radix_mpath.h	sys: further adoption of SPDX licensing ID tags.	2017-11-20 19:43:44 +00:00
radix.c	Switch RIB and RADIX_NODE_HEAD lock from rwlock(9) to rmlock(9).	2018-06-16 08:26:23 +00:00
radix.h	Fix typo.	2018-06-16 19:21:09 +00:00
raw_cb.c	sys: further adoption of SPDX licensing ID tags.	2017-11-20 19:43:44 +00:00
raw_cb.h	sys: further adoption of SPDX licensing ID tags.	2017-11-20 19:43:44 +00:00
raw_usrreq.c	sys: further adoption of SPDX licensing ID tags.	2017-11-20 19:43:44 +00:00
rndis.h
route_var.h	Switch RIB and RADIX_NODE_HEAD lock from rwlock(9) to rmlock(9).	2018-06-16 08:26:23 +00:00
route.c	Mechanical cleanup of epoch(9) usage in network stack.	2019-01-09 01:11:19 +00:00
route.h	Plug routing sysctl leaks.	2018-11-26 13:42:18 +00:00
rss_config.c
rss_config.h
rtsock.c	When sending a routing message, don't allow the user to set the	2019-04-14 10:18:14 +00:00
sff8436.h
sff8472.h	ifconfig(8): Display extended compliance code string for SFP transceivers	2017-12-05 18:42:07 +00:00
slcompress.c	sys: further adoption of SPDX licensing ID tags.	2017-11-20 19:43:44 +00:00
slcompress.h	sys: further adoption of SPDX licensing ID tags.	2017-11-20 19:43:44 +00:00
toeplitz.c
toeplitz.h
vnet.c	With more excessive use of modules, more kernel parts working with	2018-10-30 20:45:15 +00:00
vnet.h	Don't mark module data as static on RISC-V.	2018-09-12 08:05:33 +00:00