about vnode reclamation. Typical use is for the bypass mounts like
nullfs to get a notification about lower vnode going away.
Now, vgone() calls new VFS op vfs_reclaim_lowervp() with an argument
lowervp which is reclaimed. It is possible to register several
reclamation event listeners, to correctly handle the case of several
nullfs mounts over the same directory.
For the filesystem not having nullfs mounts over it, the overhead
added is a single mount interlock lock/unlock in the vnode reclamation
path.
In collaboration with: pho
MFC after: 3 weeks
lookup code that dotdot lookups shall override any shared lock
requests with the exclusive one. The flag is useful for filesystems
which sometimes need to upgrade shared lock to exclusive inside the
VOP_LOOKUP or later, which cannot be done safely for dotdot, due to
dvp also locked and causing LOR.
In collaboration with: pho
MFC after: 3 weeks
The DWC OTG host mode support should still be considered
experimental. Isochronous support for DWC OTG is not
fully implemented. Some code added derives from
Aleksandr Rybalko's dotg.c driver.
IP_SENDSRCADDR control with datagram message we reply with. This makes
bsnmpd reply from exactly same address that request was sent to, thus
successfully bypassing stateful firewalls or other kinds of strict checking.
PR: bin/171279
ath_buf and when forming a non-aggregate frame.
The non-11n setds function is called when TXing aggregate frames (and
yes, I should fix this!) and the non-11n TX aggregation code doesn't clear
the delimiter field. I figure it's nicer to do that.
Specifically document that an incomplete ports tree is not supported.
Remove useless comment about sendmail.
Reviewed by: yuri.pankov@gmail.com
Approved by: cperciva (implicit)
MFC after: 1 week
X-MFC-With: r240252
TDP_NOSLEEPING leaking from syscallret() to userret() so that also
trap handling is covered. Also, the check on td_locks is not duplicated
between the two functions.
Reported by: avg
Reviewed by: kib
MFC after: 1 week
Avoid re-walking the page table from the root for every PTE examined.
Tidy up some of pmap_remove()'s helper functions.
pmap_enter:
Set PV_TABLE_REF whenever the physical page being mapped is managed, not
just when it is writeable.
Only call pmap_update_page() when the old mapping was valid. If there was
no prior valid mapping, then pmap_update_page() serves no useful purpose.
However, it will interrupt every processor that has the pmap active.
pmap_enter_quick_locked:
Always set PTE_RO.
pmap_emulate_modified:
Don't set PV_TABLE_REF.
Eliminate a nonsensical comment.
from the control message, actually never worked. This means check_priv()
didn't work for local dgram sockets.
The SCM_CREDS control messages is received only in two cases:
1) If we did setsockopt(LOCAL_CREDS) on our socket, and in this case
the message is struct sockcred.
2) If sender did supplied SCM_CREDS control message in his sendmsg()
syscall. In this case the message is struct cmsgcred.
We can't rely on 2), so we will use 1) for dgram sockets. For stream
sockets it is more reliable to obtain accept-time credentials, since
SCM_CREDS control message is attached only on first read. Thus:
o Do setsockopt(LOCAL_CREDS) on local dgram sockets.
o Split check_priv() into check_priv_stream() and check_priv_dgram(),
and call them from recv_stream() and recv_dgram() respectively.
o Don't provide space for SCM_CREDS control message in recv_stream().
o Provide space for SCM_CREDS control message in recv_dgram(), but there
is no need to initialize anything in it.
o In recv_dgram() do not blindly expect that first message is SCM_CREDS,
instead use correct search cycle through control messages.
This had the side effect of clearing HAL_TXDESC_CLRDMASK for a bunch of
frames, meaning they'd end up being potentially filtered if there were
an error. This is fine in the previous world as they'd just be
software retried but now that I'm working on filtered frames, these
descriptors would be endlessly retried until another valid frame would
come along that had CLRDMASK set.
do a BUS_DMASYNC_POSTWRITE over the DMA map. The way it currently is would
only do POSTREAD for read transactions.
Submitted by: Sascha Wildner
MFC after: 1 month
current link points to a irrelevant catchall site.
PR: docs/171411
Submitted by: Mark Martinec <Mark.Martinec@ijs.si> (pr), me (patch)
Approved by: joel (mentor)
MFC after: 2 weeks
