This partially reverts r361053 since there have been reports
by users that this breaks some functionality for em(4)
devices; it seems at first glance that some sort of interface
restart is required for those cards.
This isn't a proper fix; this unbreaks those users until a proper
fix is found for their issues.
PR: 240818
Reported by: Marek Zarychta <zarychtam@plan-b.pwste.edu.pl>
MFC after: 3 days
Add EXAMPLES covering options I, J, L, n, P.
While here, fix warning (STYLE: no blank before trailing delimiter: Fl P,)
Bumping .Dd
Approved by: bcr@
Differential Revision: https://reviews.freebsd.org/D25214
With this change all ZVOL updates are initiated from the SPA sync
context instead of a mix of the sync and open contexts. The updates are
queued to be applied by a dedicated thread in the original order. This
should ensure that ZVOLs always accurately reflect the corresponding
datasets. ZFS ioctl operations wait on the mentioned thread to complete
its work. Thus, the illusion of the synchronous ZVOL update is
preserved. At the same time, the SPA sync thread never blocks on ZVOL
related operations avoiding problems like reported in bug 203864.
This change is based on earlier work in the same direction: D7179 and
D14669 by Anthoine Bourgeois. D7179 tried to perform ZVOL operations
in the open context and that opened races between them. D14669 uses a
design very similar to this change but with different implementation
details.
This change also heavily borrows from similar code in ZoL, but there are
many differences too. See:
- a0bd735adb
- https://github.com/zfsonlinux/zfs/issues/3681
- https://github.com/zfsonlinux/zfs/issues/2217
PR: 203864
MFC after: 5 weeks
Sponsored by: CyberSecure
Differential Revision: https://reviews.freebsd.org/D23478
Allow the TCP header to reside in the mbuf following the IP header.
Else such packets will get dropped.
Backtrace:
mlx5e_sq_xmit()
mlx5e_xmit()
ether_output_frame()
ether_output()
ip_output_send()
ip_output()
rip_output()
sosend_generic()
sosend()
kern_sendit()
sendit()
sys_sendto()
amd64_syscall()
fast_syscall_common()
MFC after: 1 week
Sponsored by: Mellanox Technologies
Typically the TCP/IP headers fit within the first mbuf and should not
trigger any of the error cases. Use unlikely() for these cases.
No functional change.
MFC after: 1 week
Sponsored by: Mellanox Technologies
When parsing the TCP/IP header in the fast path, make it clear by using
the const keyword, no fields are to be modified inside the transmitted
packet.
No functional change.
MFC after: 1 week
Sponsored by: Mellanox Technologies
I2C_SET was quite inflexible, it used too long delays as well as some
unnecessary delays. The new building blocks are iicbb_clockin and
iicbb_clockout. The former sets SDA and starts the high period of SCL,
the latter executes the low period of SCL. What happens during the high
phase depends on the operation. For writes we just hold both lines, for
reads we poll SDA. S, Sr and P change SDA in the middle of the high
period.
Also, the calculation of udelay has been updated, so that the resulting
period more closely corresponds the requested bus frequency. There is a
new knob, io_delay, that allows to further adjust udelay based on the
estimated latency of pin toggling operations.
Finally, I slightly changed debug tracing and added error indicators to
it. The debug prints are compiled in but disabled by default. This can
be of use if there is any fallout from this change.
Some ideas for further improvements:
- add a function for sub-microsecond delays (e.g., in units of 1/10th of
a microsecond) and use it for more precise timing of short delays;
- account for the actual time spent in the pin I/O.
Some sample debug output with the new code follows.
Reading temperature and humidity from HTU21 in the bus hold mode:
<<w80+ we3+ <w81+ .....r6d+ rac+ r94- >>
<<w80+ we5+ <w81+ .............r47+ re2+ r84- >>
where '<<' is S, '<' is Sr, '>>' is P, '.' is one millisecond of clock
stretching by the slave.
Reading temperature and humidity in the no-hold mode:
<<w80+ wf3+ >>
<<w81- >>
<<w81+ r6d+ r54+ raf- >>
<<w80+ wf5+ >>
<<w81- >>
<<w81+ r48+ r4e+ r9c- >>
where '+' is Ack and '-' is NoAck.
We see that first read attempts are not acknowledged.
MFC after: 4 weeks
Differential Revision: https://reviews.freebsd.org/D22206
Like every other firmware image in the tree, the makefile will need to
be updated to point to the newest import.
Reviewed by: erj, imp (previous version)
Differential Revision: https://reviews.freebsd.org/D25222
- Use the same definition of free memory as Linux.
- Rename the totalbig and freebig fields to match the corresponding
names on Linux.
Discussed with: alc
MFC after: 1 week
The firmware module arbitrarily limits us to at most 50 images. It is
possible to hit this limit on platforms that preload many firmware
images, or link all of the firmware images for a set of devices into the
kernel.
Convert the table into a linked list, removing the limit.
Reported by: Steve Wheeler
Reviewed by: rpokala
MFC after: 1 week
Sponsored by: Rubicon Communications, LLC (Netgate)
Differential Revision: https://reviews.freebsd.org/D25161
After r361988 fixed the reference count leak on booke64, it became possible
for an iteration somewhere in the middle of a page to become stale, with the
page vanishing (correctly) due to all PTEs on that page going away.
pte_find_next() would start at that iterator, and move along 'higher' order
directory pages until it finds a valid one, without zeroing out the lower
order pages. For instance:
/* Find next pte at or above 0x10002000. */
pte = pte_find_next(pmap, &(0x10002000));
pte_remove(pmap, pte);
/* This pte was the last reference in the page table page, page is
* gone.
*/
pte = pte_find_next(pmap, 0x10002000);
/* pte_find_next will see 0x10002000's page is gone, and jump to the
* next one, but starting iteration at the '0x2000' slot, skipping
* 0x0000 and 0x1000.
*/
This caused some processes, like git, to trip the KASSERT() in
pmap_release().
Fix this by zeroing all lower order iterators at each level.
It seems that second call does not add any useful state change for all
implemented timecounters.
Discussed with: bde
Sponsored by: The FreeBSD Foundation
MFC after: 3 weeks
pthread_get_name_np() and pthread_set_name_np().
This re-applies r361770 after compatibility fixes.
Reviewed by: antoine, jkim, markj
Tested by: antoine (exp-run)
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D25117
Right now code first flushes all local TLB entries that needs to be
flushed, then signals IPI to remote cores, and then waits for
acknowledgements while spinning idle. In the VMWare article 'Don’t
shoot down TLB shootdowns!' it was noted that the time spent spinning
is lost, and can be more usefully used doing local TLB invalidation.
We could use the same invalidation handler for local TLB as for
remote, but typically for pmap == curpmap we can use INVLPG for locals
instead of INVPCID on remotes, since we cannot control context
switches on them. Due to that, keep the local code and provide the
callbacks to be called from smp_targeted_tlb_shootdown() after IPIs
are fired but before spin wait starts.
Reviewed by: alc, cem, markj, Anton Rang <rang at acm.org>
Tested by: pho
Sponsored by: The FreeBSD Foundation
MFC after: 2 weeks
Differential revision: https://reviews.freebsd.org/D25188
- Configure ipu1_di0 tob e sourced from the VIDEO_PLL(PLL5) and hardcode
frequency to (455000000/3)Mhz. This value, further divided, can yield
frequencies close enough to support 1080p, 720p, 1024x768, and 640x480
modes. This is not ideal but it's an improvement comparing to the only
hardcoded 1024x768 mode.
- Fix memory leaks if attach method failed
- Print EDID when -v passed to the kernel
Writing segment id to I2C device 0x30 only required if the segment is
non-zero. On the devices without E-DCC support writing to that address
fails and whole transaction then fails too. To avoid this do
not attempt write to the segment selection device unless required.
MFC after: 2 weeks
- crypto_apply() is only used for reading a buffer to compute a
digest, so change the data pointer to a const pointer.
- To better match m_apply(), change the data pointer type to void *
and the length from uint16_t to u_int. The length field in
particular matters as none of the apply logic was splitting requests
larger than UINT16_MAX.
- Adjust the auth_xform Update callback to match the function
prototype passed to crypto_apply() and crypto_apply_buf(). This
removes the needs for casts when using the Update callback.
- Change the Reinit and Setkey callbacks to also use a u_int length
instead of uint16_t.
- Update auth transforms for the changes. While here, use C99
initializers for auth_hash structures and avoid casts on callbacks.
Reviewed by: cem
Sponsored by: Chelsio Communications
Differential Revision: https://reviews.freebsd.org/D25171
The original PCIe hot-plug code required a couple of things which cause
PCI probing errors on the QEMU Q35 system and possibly physical systems
(Dell R6515).
Allocate the hot-plug interrupt as shared to support INTx interrupts.
The hot-plug interrupt mechanism should normally be MSI as PCIe mandates
MSI support, but QEMU's Q35 bridge only provides INTx interrupts.
Second, the code required the Electromechanical Interlock (Slot Status
EIS) to be engaged if present (Slot Capability EIP). Some platforms
including QEMU Q35 set EIP but not EIS. Fix by deleting the check.
Reviewed by: imp, mav, jhb
MFC after: 2 weeks
Differential Revision: https://reviews.freebsd.org/D24877
This patch teaches sed to interpret a "-" in a special way when given
as an argument to the -f flag.
This behavior is also present in GNU sed.
PR: 244872
Tested by: antoine (exp-run)
Reviewed by: pfg, tobik (older version)
Approved by: pfg (src)
Relnotes: yes
MFC after: 2 weeks
Differential Revision: https://reviews.freebsd.org/D24079
Somewhere in net80211 if_xname is checked against NULL but it doesn't trigger
a compiler warning, but this does. So DTRT for FreeBSD and the other if_xname
derefences can be converted to this function at a later time.
applications, which often depend on this being the case. There's a new
sysctl, compat.linux.default_openfiles, to control this behaviour.
Reviewed by: kevans, emaste, bcr (manpages)
MFC after: 2 weeks
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D25177
standard SO_SNDBUF/SO_RCVBUF. Mostly cosmetics, to get rid
of the warning during 'apt upgrade'.
MFC after: 2 weeks
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D25173
On some UEFI implementations the ConsOut EFI variable is not a device
path end type so we never move to the next node. Fix this by always
incrementing the device path node pointer, with a sanity check that
the node length is large enough so no two nodes overlap.
While here return failure on malloc failure rather than a NULL pointer
dereference.
Reviewed by: tsoome, imp (previous version)
Sponsored by: Innovate UK
Differential Revision: https://reviews.freebsd.org/D25202
This simplifies the code and allows to further split rtentry and nexthop,
removing one of the blockers for multipath code introduction, described in
D24141.
Reviewed by: ae
Differential Revision: https://reviews.freebsd.org/D25192
Cubic calculates the new cwnd based on absolute time
elapsed since the start of an epoch. A cubic epoch is
started on congestion events, or once the congestion
avoidance phase is started, after slow-start has
completed.
When a sender is application limited for an extended
amount of time and subsequently a larger volume of data
becomes ready for sending, Cubic recalculates cwnd
with a lingering cubic epoch. This recalculation
of the cwnd can induce a massive increase in cwnd,
causing a burst of data to be sent at line rate by
the sender.
This adds a flag to reset the cubic epoch once a
session transitions from app-limited to cwnd-limited
to prevent the above effect.
Reviewed by: chengc_netapp.com, tuexen (mentor)
Approved by: tuexen (mentor), rgrimes (mentor)
MFC after: 3 weeks
Sponsored by: NetApp, Inc.
Differential Revision: https://reviews.freebsd.org/D25065
vmem quantum cache is only needed when doing a lot of concurrent allocations,
which doesn't happen when allocating MSIs. This wastes memory for the cache
zones. Avoid this waste and don't use the quantum cache.
Reported by: markj
These two functions are needed by nfs-over-tls, but could also be
useful for other purposes.
mb_alloc_ext_plus_pages() - Allocates a M_EXTPG mbuf and enough anonymous
pages to store "len" data bytes.
mb_mapped_to_unmapped() - Copies the data from a list of mapped (non-M_EXTPG)
mbufs into a list of M_EXTPG mbufs allocated with anonymous pages.
This is roughly the inverse of mb_unmapped_to_ext().
Reviewed by: gallatin
Differential Revision: https://reviews.freebsd.org/D25182
Some environments in which execvPe may be called have a limited amount of
stack available. Currently, it avoidably allocates a segment on the stack
large enough to hold PATH so that it may be mutated and use strsep() for
easy parsing. This logic is now rewritten to just operate on the immutable
string passed in and do the necessary math to extract individual paths,
since it will be copying out those segments to another buffer anyways and
piecing them together with the name for a full path.
Additional size is also needed for the stack in posix_spawnp(), because it
may need to push all of argv to the stack and rebuild the command with sh in
front of it. We'll make sure it's properly aligned for the new thread, but
future work should likely make rfork_thread a little easier to use by
ensuring proper alignment.
Some trivial cleanup has been done with a couple of error writes, moving
strings into char arrays for use with the less fragile sizeof().
Reported by: Andrew Gierth <andrew_tao173.riddles.org.uk>
Reviewed by: jilles, kib, Andrew Gierth
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D25038
If execve fails with ENOEXEC, execvp is expected to rebuild the command
with /bin/sh instead and try again.
The previous version did this, but overlooked two details:
argv[0] can conceivably be NULL, in which case memp would never get
terminated. We must allocate no less than three * sizeof(char *) so we can
properly terminate at all times. For the non-NULL argv standard case, we
count all the non-NULL elements and actually skip the first argument, so we
end up capturing the NULL terminator in our bcopy().
The second detail is that the spec is actually worded such that we should
have been preserving argv[0] as passed to execvp:
"[...] executed command shall be as if the process invoked the sh utility
using execl() as follows:
execl(<shell path>, arg0, file, arg1, ..., (char *)0);
where <shell path> is an unspecified pathname for the sh utility, file is
the process image file, and for execvp(), where arg0, arg1, and so on
correspond to the values passed to execvp() in argv[0], argv[1], and so on."
So we make this change at this time as well, while we're already touching
it. We decidedly can't preserve a NULL argv[0] as this would be incredibly,
incredibly fragile, so we retain our legacy behavior of using "sh" for
argv[] in this specific instance.
Some light tests are added to try and detect some components of handling the
ENOEXEC fallback; posix_spawnp_enoexec_fallback_null_argv0 is likely not
100% reliable, but it at least won't raise false-alarms and it did result in
useful failures with pre-change libc on my machine.
This is a secondary change in D25038.
Reported by: Andrew Gierth <andrew_tao173.riddles.org.uk>
Reviewed by: jilles, kib, Andrew Gierth
MFC after: 1 week
