This commit adds a new sysctl accept_ra_rt_info_min_plen that
defines the minimum acceptable prefix length of Route Information
Options. The new sysctl is intended to be used together with
accept_ra_rt_info_max_plen to configure a range of acceptable
prefix lengths. It is useful to prevent misconfigurations from
unintentionally blackholing too much of the IPv6 address space
(e.g., home routers announcing RIOs for fc00::/7, which is
incorrect).
Signed-off-by: Joel Scherpelz <jscherpelz@google.com>
Acked-by: Lorenzo Colitti <lorenzo@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Jakub Kicinski says:
====================
nfp: allow concurrency in core and minor fixes
The first 10 patches of this series prepare nfpcore for concurrent
accesses. This will be needed by upcoming hwmon and devlink patches.
Most locking is already in place, the patches in this series iron out
a few bugs.
Last 5 patches are fixes and cleanups to the netdev code, including
removal of doorbell pointers used only on old versions of the chip,
removal of unnecessarily defensive code and flushing xmit_more more
carefully on error paths.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Since we no longer need to keep the FW enabled for .ndo_close()
to work we can always stop FW after reconfiguration failure.
This seems to make most FWs more resilient to faults (at least
in error injection scenarios).
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Device open and close handlers check if the device is already
in the desired state. Thanks to our reconfig infrastructure
this should not be necessary, there doesn't seem to be any
code in the driver which depends on it.
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
In case of ring full or DMA mapping error remember to flush xmit_more
delayed kicks.
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
NFP6000 doesn't use queue pointers/doorbells for RX, it uses
'done' bit in descriptors. Remove the pointers from data structures.
Since we are saving space in rx_ring structure make fields we
previously compressed to 16bits word size again.
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
When acquiring an area fails we can't call function doing both
release and free.
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Core should detect when someone is trying to request an access
window which is too large for a given type of access. Otherwise
the requester will be put on a wait queue for ever without any
error message.
Add const qualifiers to clarify that we are only looking at read-
-only members in relevant functions.
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
When signal interrupts waiting for an area to become available
we assume success. Pay attention to the return code. Unpack
the code a little bit to make it more readable.
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
msleep_interruptible() returns time left to wait, not error
code. Return ERESTARTSYS when interrupted.
While at it correct a comment and make the polling a bit
more aggressive.
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
We shouldn't access area_cache_list without its lock even
to check if it's empty.
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
After mutex cache removal we can put the mutex code in a separate
source file. This makes it clear it doesn't play with internals
of struct nfp_cpp any more.
No functional changes.
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
CPP mutex cache was introduced to work around the fact that the
same host could successfully acquire a lock multiple times. It
used to collapse multiple users to the same struct nfp_cpp_mutex
and track use count. Unfortunately it's racy. Since we now force
all nfp_mutex_lock() callers within the host to actually succeed
at acquiring the lock we no longer need the cache, let's remove it.
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The global device lock is acquired to search the resource table.
The lock is actually itself part of the table (entry 0).
Therefore if someone asks for resource 0 we would deadlock since
double locking is no longer allowed.
Currently the driver doesn't try to lock that resource so let's
simply make sure we fail graciously and not add special handling
of this case until really need. Hide the relevant defines in
the source file.
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
NFP can be connected to multiple machines via PCI or other buses.
Access to hardware resources is arbitrated using locks residing
in device memory. Currently nfpcore only respects the mutexes
when it comes to inter-host locking, but if we try to acquire
the same lock again, on one host - it will simply return success
because owner of the lock is already set to that host.
This makes the locks useless for arbitration within one host
and unfair because whichever host grabbed the lock will have
a chance to reacquire it without others getting a shot.
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The dma_mapping_error() returns true if there is an error but we want
to return -ENOMEM and not 1.
Fixes: 65e0ace2c5 ("net: dwc-xlgmac: Initial driver for DesignWare Enterprise Ethernet")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Jie Deng <jiedeng@synopsys.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Use the rtnl_dump_all to dump all netconf handlers that have been
registered. Allows userspace to send a dump request for PF_UNSPEC
and get all families.
Cc: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David Ahern <dsa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Russell King says:
====================
Clean up PHY MMD accessors
This series cleans up phylib's MMD accessors, so that we have a common
way of accessing the Clause 45 register set.
The current situation is far from ideal - we have phy_(read|write)_mmd()
which accesses Clause 45 registers over Clause 45 accesses, and we have
phy_(read|write)_mmd_indirect(), which accesses Clause 45 registers via
Clause 22 register 13/14.
Generic code uses the indirect methods to access standard Clause 45
features, and when we come to add Clause 45 PHY support to phylib, we
would need to make these conditional upon the PHY type, or duplicate
these functions.
An alternative solution is to merge these accessors together, and select
the appropriate access method depending upon the 802.3 clause that the
PHY conforms with. The result is that we have a single set of
phy_(read|write)_mmd() accessors.
For cases which require special handling, we still allow PHY drivers to
override all MMD accesses - except rather than just overriding the
indirect accesses. This keeps existing overrides working.
Combining the two also has another beneficial side effect - we get rid
of similar functions that take arguments in different orders. The
old direct accessors took the phy structure, devad and register number,
whereas the indirect accessors took the phy structure, register number
and devad in that order. Care must be taken when updating future
drivers that the argument order is correct, and the function name is
not merely replaced.
This patch set is against net-next.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Make mmd_phy_indirect() use the same terminology as the rest of the
code, making clear what each address is - phy address, devad, and
register number.
While here, remove the "inline" from this static function, leaving
it to the compiler to decide whether to inline this function, and
get rid of unnecessary parens.
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
Convert micrel to the new read_mmd/write_mmd driver methods. This
Clause 22 PHY does not support any MMD access method.
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
Switch everyone over to using phy_read_mmd() and phy_write_mmd() now
that they are able to handle both Clause 22 indirect addressing and
Clause 45 direct addressing methods to the MMD registers.
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
lan78xx appears to use phylib in a rather weird way, accessing the PHY
partly through phylib, and partly by making direct accesses to it,
including to the Clause 45 registers. As the indirect MMD accessors are
going away, update this driver to use the plain phy_(read|write)_mmd()
accessors instead.
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Acked-by: Woojung Huh <Woojung.Huh@microchip.com>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
Joel Scherpelz
David S. Miller
Jakub Kicinski
Dan Carpenter
David Ahern
Russell King