Commit Graph

269385 Commits

Author SHA1 Message Date
Gordon Bergling
80abcfbdfe bxe(4): Fix a few common typos in source code comments
- s/controled/controlled/
- s/allignment/alignment/

MFC after:	3 days
2021-10-27 06:15:06 +02:00
Adrian Chadd
d524e370c4 iwm: Update SCD register accesses
This brings it inline with what's in openbsd.  I tested it locally
with 2G and 5G association; it seems to work.

Tested: Intel 7260 AC, hw 0x140, STA mode, 2G/5G

Differential Revision: https://reviews.freebsd.org/D32627
Subscribers: imp
Obtainde from: OpenBSD
2021-10-26 20:28:55 -07:00
Adrian Chadd
355c15130a iwm: update if_iwmreg.h to the latest (as of today) openbsd changes
Summary:
This updates the if_iwmreg.h definitions to;

OpenBSD: if_iwmreg.h,v 1.65 2021/10/11 09:03:22 stsp Exp

A few things haven't been fully converted, namely:

* I left a couple things as enums for now just to reduce the
  other diffs needed; but they're the same values

* The IWM_SCD_QUEUE_* macros have different offsets which I
  didn't update in case they broke things / changed based on later
  firmware.  But they also may be real bugfixes which are needed
  for later chips.  It'll need more testing before flipping this on.

The c file updates are:

* Use the newer names for things if the name changed but the semantics
  didn't
* Explicitly use the earlier firmware structs which maintain compat
  with the current firmware and code.  The newer ones are in here and
  they'll get converted when more openbsd code is merged into this tree.
* Use the older iwm rate table for now, which has entries for legacy
  rates, HT and VHT.  Our code works with that right now, updating it
  to openbsd's err, "different" version can be done at a later date
  when HT/VHT support is added.

Notably, a bunch of definitions were deleted that weren't used.
They're not used either in the openbsd/dfbsd drivers so I think it's
safe to delete them in the long run.

Test Plan: 7260 hw 0x140

Subscribers: imp
Differential Revision: https://reviews.freebsd.org/D32627
Reviewed by: md5
Obtained From: OpenBSD
2021-10-26 20:28:54 -07:00
Steve Kargl
ca3d8cb087 lib/msun: Move the files to appropriate locations in the Makefile
Fixes:	dce5f3abed
PR:	218514
MFC after:	1 week
2021-10-27 01:34:12 +03:00
Konstantin Belousov
6312d14461 lib/msun/ld128/s_tanpil.c: make it compile.
Declare local, add missed ';'.
Name function properly.

Fixes:	dce5f3abed
Reviewed by:	kargl
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
2021-10-27 01:34:12 +03:00
John Baldwin
7ef7b252ad ctld: Always declare MaxRecvDataSegmentLength.
This key is Declarative and should always be sent even if the
initiator did not send it's own limit.  This is similar to the fix in
fc79cf4fea but for the target side.  However, unlike that fix,
failure to send the key simply results in reduced performance.

PR:		259439
Reviewed by:	mav, emaste
Sponsored by:	Chelsio Communications
Differential Revision:	https://reviews.freebsd.org/D32651
2021-10-26 14:52:40 -07:00
John Baldwin
cdbc4a074b Further refine the ExpDataSN checks for SCSI Response PDUs.
According to 11.4.8 in RFC 7143, ExpDataSN MUST be 0 if the response
code is not Command Completed, but we were requiring it to always be
the count of DataIn PDUs regardless of the response code.

In addition, at least one target (OCI Oracle iSCSI block device)
returns an ExpDataSN of 0 when returning a valid completion with an
error status (Check Condition) in response to a SCSI Inquiry.  As a
workaround for this target, only warn without resetting the connection
for a 0 ExpDataSN for responses with a non-zero error status.

PR:		259152
Reported by:	dch
Reviewed by:	dch, mav, emaste
Fixes:		4f0f5bf995 iscsi: Validate DataSN values in Data-In PDUs in the initiator.
Sponsored by:	Chelsio Communications
Differential Revision:	https://reviews.freebsd.org/D32650
2021-10-26 14:50:05 -07:00
Ed Maste
93942379cc Avoid building libfido2 if WITHOUT_USB
libfido2 requires USB, so disable it if not available.

Reported by:	peterj
Fixes:		7b1e19ad78 ("Add libfido2 to the build")
Sponsored by:	The FreeBSD Foundation
2021-10-26 17:17:56 -04:00
Ed Maste
48cb3fee25 Retire obsolete iscsi_initiator(4)
The new iSCSI initiator iscsi(4) was introduced with FreeBSD 10.0, and
the old intiator was marked obsolete shortly thereafter (in commit
d32789d95c, MFC'd to stable/10 in ba54910169).  Remove it now.

Reviewed by:	jhb, mav
Relnotes:	yes
Sponsored by:	The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D32673
2021-10-26 16:17:35 -04:00
Randall Stewart
12752978d3 tcp: The rack stack can incorrectly have an overflow when calculating a burst delay.
If the congestion window is very large the fact that we multiply it by 1000 (for microseconds) can
cause the uint32_t to overflow and we incorrectly calculate a very small divisor. This will then
cause the burst timer to be very large when it should be 0. Instead lets make the three variables
uint64_t and avoid the issue.

Reviewed by: Michael Tuexen
Sponsored by: Netflix Inc.
Differential Revision: https://reviews.freebsd.org/D32668
2021-10-26 13:17:58 -04:00
Katsuyuki Miyoshi
bb4c691299 lualoader: fix the autoboot_delay countdown message
When the timer drops from double to single digits, a spare 'e' is left
on the end of the line as we don't overwrite it. Include an extra space
at the end to account for this and overwrite the leftover character.

PR:		259429
MFC after:	3 days
Reviewed by:	emaste
2021-10-26 11:24:29 -05:00
Wolfram Schneider
8019068d7c /etc/periodic/weekly/310.locate must read /etc/locate.rc
PR:             160225
Reported by:    Hiroaki Abe
Reviewed by:    se
Approved by:    se
Differential Revision: https://reviews.freebsd.org/D32646
2021-10-26 14:59:39 +00:00
Ka Ho Ng
fcfa64801a sh: Set PATH envvar after setting HOME in dotfile
In single-user mode, all env vars are absent, so exptilde() would not be
able to expand ~ correctly.
Place the lines setting PATH below HOME, so exptilde() would work as
expected.

Sponsored by:	The FreeBSD Foundation
MFC after:	3 days
Reviewed by:	jilles, emaste
Differential Revision:	https://reviews.freebsd.org/D27003
2021-10-26 22:50:09 +08:00
Mark Johnston
426682b05a bpf: Fix the write filter for detached descriptors
A BPF descriptor only has an associated interface descriptor once it is
attached to an interface, e.g., with BIOCSETIF.  Avoid dereferencing a
NULL pointer in filt_bpfwrite() if the BPF descriptor is not attached.

Reviewed by:	ae
Reported by:	syzbot+ae45d5166afe15a5a21d@syzkaller.appspotmail.com
Fixes:	ded77e0237 ("Allow the BPF to be select for write.")
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D32561
2021-10-26 10:00:39 -04:00
Baptiste Daroussin
c0cf36bc02 ncurses: rework static linker script generation
Rework the generation of the linker script to make it in par with
ldscript, this also forces the regeneration of the .aldscript in the obj
dir which might in the past have ended up empty.

Tested by:	manu
2021-10-26 15:57:29 +02:00
Konstantin Belousov
57e5da2c98 Augment systat(1) -swap to display large swap space processes
This change updates the systat(1) -swap display to use libprocstat to
obtain and display per-process swap space usage infomation following its
existing swap devise/file statistics. It also incorporates the disk I/O
information from the -vmstat display.

The new screen looks like below with 'systat -swap':
                    /0   /1   /2   /3   /4   /5   /6   /7   /8   /9 /10
     Load Average   |

Device/Path       Size  Used |0%  /10  /20  /30  /40  / 60\  70\  80\ 90\ 100|
ada0s1b          2048M 2034M
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
zvol/sys/tempora 1024M 1015M
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
zvol/sys/swap    1024M 1014M
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
Total            4096M 4063M
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

Pid    Username   Command     Swap/Total Per-Process    Per-System
 24153 hiro       seamonkey   98M /   1G  7%              2%
 23677 hiro       xfce4-pane  28M /  81M 34% XXX          0%
 23629 hiro       xfce4-sess  25M / 118M 21% XX           0%
 23681 hiro       xfdesktop   20M /  58M 34% XXX          0%
 23678 hiro       thunar      15M /  43M 36% XXX          0%
 23658 hiro       at-spi-bus  14M /  23M 63% XXXXXX       0%
 23660 hiro       gvfsd       12M /  21M 56% XXXXX        0%

Disks  ada0  ada1  ada2   cd0 pass0 pass1 pass2 pass3
KB/t   8.00  0.00  0.00  0.00  0.00  0.00  0.00  0.00
tps       0     0     0     0     1     0     0     0
MB/s   0.00  0.00  0.00  0.00  0.00  0.00  0.00  0.00
%busy     0     0     0     0     0     0     0     0

Submitted by:	Yoshihiro Ota
MFC after:	1 week
Differential revision:	https://reviews.freebsd.org/D29754
2021-10-26 15:50:29 +03:00
Konstantin Belousov
f2069331e5 libutil: add kinfo_getswapvmobject(3)
which is the wrapper around the vm.swap_objects sysctl, same as
kinfo_getvmobject(3) wraps vm.objects.

Submitted by:	Yoshihiro Ota
MFC after:	1 week
Differential revision:	https://reviews.freebsd.org/D29754
2021-10-26 15:50:29 +03:00
Wei Hu
1833cf1373 Mana: move mana polling from EQ to CQ
-Each CQ start task queue to poll when completion happens.
    This means every rx and tx queue has its own cleanup task
    thread to poll the completion.
    - Arm EQ everytime no matter it is mana or hwc. CQ arming
    depends on the budget.
    - Fix a warning in mana_poll_tx_cq() when cqe_read is 0.
    - Move cqe_poll from EQ to CQ struct.
    - Support EQ sharing up to 8 vPorts.
    - Ease linkdown message from mana_info to mana_dbg.

Tested by:	whu
MFC after:	2 weeks
Sponsored by:	Microsoft
2021-10-26 12:25:22 +00:00
Peter Holm
cbc3ecb7ef stress2: Added two syzkaller reproducers 2021-10-26 09:59:04 +00:00
Rick Macklem
23024f004a nfscl: Add a missing delegation lock release
There was a case in nfscl_doiods() where the function would return
without releasing the delegation shared lock, if it was aquired by
the call to nfscl_getstateid().  This patch adds that release.

I have never observed a failure due to this missing release, so I
do not know if it ever happens in practice.  However, since the pNFS
client is not yet heavily used, it might be the case.

Found by code inspection during a recent NFSv4 IETF working group
testing event.

MFC after:	2 week
2021-10-25 19:11:45 -07:00
Steve Kargl
dce5f3abed [LIBM] implementations of sinpi[fl], cospi[fl], and tanpi[fl]
Both IEEE-754 2008 and ISO/IEC TS 18661-4 define the half-cycle
trignometric functions cospi, sinpi, and tanpi.  The attached
patch implements cospi[fl], sinpi[fl], and tanpi[fl].  Limited
testing on the cospi and sinpi reveal a max ULP less than 0.89;
while tanpi is more problematic with a max ULP less than 2.01
in the interval [0,0.5].  The algorithms used in these functions
are documented in {ks}_cospi.c, {ks}_sinpi.c, and s_tanpi.c.

Note.  I no longer have access to a system with ld128 and
adequate support to compile and test the ld128 implementations
of these functions.  Given the almost complete lack of input from
others on improvements to libm, I doubt that anyone cares.  If
someone does care, the ld128 files contain a number of FIXME comments,
and in particular, while the polynomial coefficients are given
I did not update the polynomial algorithms to properly use the
coefficients.

PR:	218514
MFC after:	2 weeks
2021-10-26 02:50:20 +03:00
Ed Maste
179219ea04 strip/objcopy: handle empty file as unknown
Previously strip reported a somewhat cryptic error for empty files:

    strip: elf_begin() failed: Invalid argument

Add a special case to treat empty files as with an unknown file format.
This is consistent with llvm-strip.  GNU strip produces no output which
does not seem like useful behaviour (but it does exit with status 1).

Reported by:	andrew
Reviewed by:	markj
MFC after:	2 weeks
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D32648
2021-10-25 17:28:41 -04:00
Michael Tuexen
b15b053596 tcp: allow new reno functions to be called from other CC modules
Some new reno functions use the internal data, but are also called
from functions of other CC modules. Ensure that in this case, the
internal data is not accessed.

Reported by:		syzbot+1d219ea351caa5109d4b@syzkaller.appspotmail.com
Reported by:    	syzbot+b08144f8cad9c67258c5@syzkaller.appspotmail.com
Reviewed by:		rrs
Sponsored by:		Netflix, Inc.
Differential Revision:	https://reviews.freebsd.org/D32649
2021-10-25 22:53:49 +02:00
Bjoern A. Zeeb
c5eec7b57c LinuxKPI: module.h add MODULE_SUPPORTED_DEVICE()
Add a dummy MODULE_SUPPORTED_DEVICE define as we do for other
MODULE_* macros.  This is needed by a wireless driver.

MFC after:	3 days
Differential Revision: https://reviews.freebsd.org/D32641
2021-10-25 20:26:01 +00:00
Ed Maste
fc79cf4fea iscsid: set max_recv_data_segment_length to what we advertise
Previously we updated the conection's conn_max_recv_data_segment_length
only when we received a response containing MaxRecvDataSegmentLength
from the target.  If the target did not send MaxRecvDataSegmentLength
then we left conn_max_recv_data_segment_length at the default (i.e.,
8192).  A target could then send more data than that defult (up to our
advertised maximum), and we would drop the connection.

RFC 7143 specifies that MaxRecvDataSegmentLength is Declarative, not
negotiated.  Just set conn_max_recv_data_segment_length to our
advertised value in login_negotiate().

PR:		259355
Reviewed by:	mav
MFC after:	1 week
Fixes:		a15fbc904a ("Alike to r312190 decouple iSCSI...")
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D32605
2021-10-25 16:25:15 -04:00
Bjoern A. Zeeb
548ada00e5 LinuxKPI: add bcd.h
Add bcd2bin() as linuxkpi_bcd2bin().  Libkern does provide a bcd2bin()
which cannot be used leaving us with a conflict (see comment in file).
Fortunately this is only seen in one driver so far and it seems easier
to drop this in and change a single line in the driver than to add this
inline in the driver.

MFC after:	3 days
Reviewed by:	hselasky
Differential Revision: https://reviews.freebsd.org/D32647
2021-10-25 20:20:53 +00:00
Bjoern A. Zeeb
cf89934842 LinuxKPI: pci.h / linux_pci.c rename pci_driver field
Rename the struct pci_driver {} field got the list_head from links
to node as a driver is actually initialsing this to {} which seems
questionable but it will at least make us match the Linux structure
field name.

MFC after:	3 days
Reviewed by:	manu, hselasky
Differential Revision: https://reviews.freebsd.org/D32645
2021-10-25 20:19:24 +00:00
Bjoern A. Zeeb
ed5600f532 LinuxKPI: pci.h make pci_dev argument const for pci_{read,write}_config*()
Make the struct pci_dev argument to the pci_{read,write}_config*()
functions "const" to match the Linux definition as some drivers
try to pass in a const argument which we currently fail to honor.

Sponsored by:	The FreeBSD Foundation
MFC after:	3 days
Reviewed by:	hselasky
Differential Revision: https://reviews.freebsd.org/D32644
2021-10-25 20:17:56 +00:00
Bjoern A. Zeeb
490f9d8f0e LinuxKPI: add netdev_features.h
Add netdev_features.h as a spearate file from the future netdevice.h
implementation to avoid include problems with a future skbuff.h.

Sponsored by:	The FreeBSD Foundation
MFC after:	3 days
Reviewed by:	hselasky
Differential Revision: https://reviews.freebsd.org/D32643
2021-10-25 20:16:23 +00:00
Bjoern A. Zeeb
41dee251ee LinuxKPI: add simple_open() to fs.h
Add a dummy simple_open() to fs.h as we have for other
(unsupported) functions.
This is needed by a wireless driver.

MFC after:	3 days
Reviewed by:	hselasky
Differential Revision: https://reviews.freebsd.org/D32642
2021-10-25 20:14:42 +00:00
Bjoern A. Zeeb
9d593d5a76 mlx4: rename conflicting netdev_priv() to mlx4_netdev_priv()
netdev_priv() is a LinuxKPI function which was used with the old ifnet
linux/netdevice.h implementation which was not adaptable to modern
Linux drviers unless rewriting them for ifnet in first place which
defeats the purpose.
Rename the netdev_priv() calls in mlx4 to mlx4_netdev_priv()
returning the ifnet softc to avoid conflicting symbol names
with different implementations in the future.

MFC after:	3 days
Reviewed by:	hselasky, kib
Differential Revision: https://reviews.freebsd.org/D32640
2021-10-25 20:12:32 +00:00
Mateusz Guzik
ea14af2d3c Inline critical enter/exit for "tied" kernel modules
Sponsored by:	Rubicon Communications, LLC ("Netgate")
2021-10-25 20:07:06 +00:00
Mateusz Guzik
e2493f4912 arm: fix a typo in nvidia/drm2/tegra_bo.c
Unbreaks building TEGRA124

Sponsored by:	Rubicon Communications, LLC ("Netgate")
2021-10-25 18:42:10 +00:00
Gleb Smirnoff
f2d266f3b0 Don't run ip_ctloutput() for divert socket.
It was here since divert(4) was introduced, probably just came with a
protocol definition boilerplate.  There is no useful socket option
that can be set or get for a divert socket.

Reviewed by:		donner
Differential Revision:	https://reviews.freebsd.org/D32608
2021-10-25 11:16:59 -07:00
Gleb Smirnoff
d89c820b0d Remove div_ctlinput().
This function does nothing since 97d8d152c2. It was introduced
in 252f24a2cf with a sidenote "may not be needed".

Reviewed by:		donner
Differential Revision:	https://reviews.freebsd.org/D32608
2021-10-25 11:16:49 -07:00
Konstantin Belousov
40ddde6ef9 rtld: Print currently configured search path for libraries for -v
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
2021-10-25 20:41:53 +03:00
Konstantin Belousov
350fc36b4c sysctl vm.objects: yield if hog
Reviewed by:	markj
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
Differential revision:	https://reviews.freebsd.org/D31163
2021-10-25 20:34:02 +03:00
Konstantin Belousov
7738118e9a vm.objects_swap: disable reporting some information
For making the call faster, do not count active/inactive object queues,
and do not report vnode info if any (for tmpfs).

Reviewed by:	markj
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
Differential revision:	https://reviews.freebsd.org/D31163
2021-10-25 20:34:01 +03:00
Konstantin Belousov
42812ccc96 Add vm.swap_objects sysctl
Reviewed by:	markj
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
Differential revision:	https://reviews.freebsd.org/D31163
2021-10-25 20:34:01 +03:00
Konstantin Belousov
1b610624fd vm_object_list: split sysctl handler in separate function
Reviewed by:	markj
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
Differential revision:	https://reviews.freebsd.org/D31163
2021-10-25 20:34:01 +03:00
Mark Johnston
9ef7df022a hyperv: Register hyperv_timecounter later during boot
Previously the MSR-based timecounter was registered during
SI_SUB_HYPERVISOR, i.e., very early during boot, and before SI_SUB_LOCK.
After commit 621fd9dcb2 this triggers a panic since the timecounter
list lock is not yet initialized.

The hyperv timecounter does not need to be registered so early, so defer
that to SI_SUB_DRIVERS, at the same time the hyperv TSC timecounter is
registered.

Reported by:	whu
Approved by:	whu
Fixes:		621fd9dcb2 ("timecounter: Lock the timecounter list")
MFC after:	1 week
Sponsored by:	The FreeBSD Foundation
2021-10-25 13:25:01 -04:00
Bjoern A. Zeeb
a5e2a27dca LinuxKPI: add strreplace() to string.h
Add strreplace() needed by a driver.
MFC after:	3 days

Reviewed by:	hselasky
Differential Revision: https://reviews.freebsd.org/D32597
2021-10-25 16:12:10 +00:00
Bjoern A. Zeeb
b382b78503 LinuxKPI: add kstrtou8() and kstrtou8_from_user() to kernel.h
Analogous to the other sized version of kstrto[u]<type>() and
kstrtobool_from_user() add the "u8" versions needed by a driver.

MFC after:	3 days
Reviewed by:	hselasky
Differential Revision: https://reviews.freebsd.org/D32598
2021-10-25 16:10:48 +00:00
Mateusz Piotrowski
eab5358b90 Makefile.inc1: Remove mentions of removed target "update"
This is follow-up to commits e290182bcf and 1f7d11e636.
2021-10-24 21:07:45 +02:00
Hans Petter Selasky
aad0c65d6b usb(4): Fix for use after free in combination with EVDEV_SUPPORT.
When EVDEV_SUPPORT was introduced, the USB transfers may be running
after the main FIFO is closed. In connection to this a race may appear
which can lead to use-after-free scenarios. Fix this for all FIFO
consumers by initializing and resetting the FIFO queues under the
lock used by the client. Then the client driver will see an empty
queue in all cases a race may appear.

Found by:	pho@
MFC after:	1 week
Sponsored by:	NVIDIA Networking
2021-10-24 19:37:17 +02:00
Hans Petter Selasky
790b526488 mixer(3): Fix spelling in comment.
s/MIX_STATUS_XXX/MIX_MODE_XXX/g

Differential Revision:	https://reviews.freebsd.org/D32548
Submitted by:	christos@
Sponsored by:	NVIDIA Networking
2021-10-24 19:37:17 +02:00
Jason A. Harmening
fd8ad2128d unionfs: implement vnode-based cache lookup
unionfs uses a per-directory hashtable to cache subdirectory nodes.
Currently this hashtable is looked up using the directory name, but
since unionfs nodes aren't removed from the cache until they're
reclaimed, this poses some problems.  For example, if a directory is
created on a unionfs mount shortly after deleting a previous directory
with the same path, the cache may end up reusing the node for the
previous directory, including its upper/lower FS vnodes.  Operations
against those vnodes with then likely fail because the vnodes
represent deleted files; for example UFS will reject VOP_MKDIR()
against such a vnode because its effective link count is 0.  This may
then manifest as e.g. mkdir(2) or open(2) returning ENOENT for an
attempt to create a file under the re-created directory.

While it would be possible to fix this by explicitly managing the
name-based cache during delete or rename operations, or by rejecting
cache hits if the underlying FS vnodes don't match those passed to
unionfs_nodeget(), it seems cleaner to instead hash the unionfs nodes
based on their underlying FS vnodes.  Since unionfs prefers to operate
against the upper vnode if one is present, the lower vnode will only
be used for hashing as long as the upper vnode is NULL.  This should
also make hashing faster by eliminating string traversal and using
the already-computed hash index stored in each vnode.

While here, fix a couple of other cache-related issues:

--Remove 8 bytes of unnecessary baggage from each unionfs node by
  getting rid of the stored hash mask field.  The mask is knowable
  at compile time.

--When a matching node is found in the cache, reference its vnode
  using vrefl() while still holding the vnode interlock.  Previously
  unionfs_nodeget() would vref() the vnode after the interlock was
  dropped, but the vnode may be reclaimed during that window.  This
  caused intermittent panics from vn_lock(9) during unionfs stress
  testing.

Reviewed by:	kib, markj
Tested by:	pho
Differential Revision:	https://reviews.freebsd.org/D32533
2021-10-24 10:05:50 -07:00
Kirk McKusick
dfd704b7fb Allow biodone() to be used as a completion routine.
An ordered series of BIO_READ and BIO_WRITE operations are
typically done as:

	while (work to do) {
		setup bp for I/O
		g_io_request(bp, consumer);
		biowait(bp);
	}

Here you need to have biodone() called at the completion of
the I/O to set the BIO_DONE flag and awaken the biowait(). The
obvious way to do this would be to set bio_done = biodone, but
biodone() will only take the desired action if bio_done == NULL.
The relevant code at the end of biodone() is:

	done = bp->bio_done;
	if (done == NULL) {
		mtxp = mtx_pool_find(mtxpool_sleep, bp);
		mtx_lock(mtxp);
		bp->bio_flags |= BIO_DONE;
		wakeup(bp);
		mtx_unlock(mtxp);
	} else
		done(bp);

This code would infinitely recurse if biodone() is specified as the
routine to use at completion. So before this change, a wrapper done
function had to be written:

static void
g_io_done(struct bio *bp)
{

	bp->bio_done = NULL;
	biodone(bp);
	bp->bio_done = g_io_done;
}

This commit changes

	if (done == NULL)

to

	if (done == NULL || done == biodone)

which eliminates the need for the wrapper function.

Reviewed by:  kib
Sponsored by: Netflix
2021-10-23 14:11:57 -07:00
Robert Wing
311b95bbcd sys/mount.h: remove dead prototype
vfs_getrootfsid() was removed in 245efbba4d

Reviewed by:	mjg
Differential Revision:	https://reviews.freebsd.org/D32606
2021-10-23 16:13:20 -08:00
Edward Tomasz Napierala
2ec26ae402 linux: Improve debug for PTRACE_GETEVENTMSG
No functional changes.

Sponsored By:	EPSRC
2021-10-23 19:53:12 +01:00