RDMA/cma: Always set static rate to 0 for RoCE

Set static rate to 0 as it should be discovered by path query and
has no meaning for RoCE.
This also avoid of using the rtnl lock and ethtool API, whic

RDMA/cma: Always set static rate to 0 for RoCE

Set static rate to 0 as it should be discovered by path query and
has no meaning for RoCE.
This also avoid of using the rtnl lock and ethtool API, which is
a bottleneck when try to setup many rdma-cm connections at the same
time, especially with multiple processes.

Fixes: 3c86aa70bf67 ("RDMA/cm: Add RDMA CM support for IBoE devices")
Signed-off-by: Mark Zhang <[email protected]>
Link: https://lore.kernel.org/r/f72a4f8b667b803aee9fa794069f61afb5839ce4.1685960567.git.leon@kernel.org
Signed-off-by: Leon Romanovsky <[email protected]>

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net: don't include ethtool.h from netdevice.h

linux/netdevice.h is included in very many places, touching any
of its dependecies causes large incremental builds.

Drop the linux/ethtool.h include, l

net: don't include ethtool.h from netdevice.h

linux/netdevice.h is included in very many places, touching any
of its dependecies causes large incremental builds.

Drop the linux/ethtool.h include, linux/netdevice.h just needs
a forward declaration of struct ethtool_ops.

Fix all the places which made use of this implicit include.

Acked-by: Johannes Berg <[email protected]>
Acked-by: Shannon Nelson <[email protected]>
Reviewed-by: Jesse Brandeburg <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>

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RDMA/include: Replace license text with SPDX tags

The header files in RDMA subsystem are dual licensed and can be
described by simple SPDX tag, so replace all of them at once
together with making th

RDMA/include: Replace license text with SPDX tags

The header files in RDMA subsystem are dual licensed and can be
described by simple SPDX tag, so replace all of them at once
together with making them use the same coding style for header
guard defines.

Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Leon Romanovsky <[email protected]>
Signed-off-by: Jason Gunthorpe <[email protected]>

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RDMA/core: Annotate timeout as unsigned long

The ucma users supply timeout in u32 format, it means that any number
with most significant bit set will be converted to negative value
by various rdma_*

RDMA/core: Annotate timeout as unsigned long

The ucma users supply timeout in u32 format, it means that any number
with most significant bit set will be converted to negative value
by various rdma_*, cma_* and sa_query functions, which treat timeout
as int.

In the lowest level, the timeout is converted back to be unsigned long.
Remove this ambiguous conversion by updating all function signatures to
receive unsigned long.

Reported-by: Noa Osherovich <[email protected]>
Signed-off-by: Leon Romanovsky <[email protected]>
Signed-off-by: Doug Ledford <[email protected]>

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RDMA/core: Align multiple functions to kernel coding style

This patch changes the small number of functions to be aligned to kernel
coding style. It is needed to minimize the diffstat of the followi

RDMA/core: Align multiple functions to kernel coding style

This patch changes the small number of functions to be aligned to kernel
coding style. It is needed to minimize the diffstat of the following
patch. It doesn't change any functionality.

Signed-off-by: Leon Romanovsky <[email protected]>
Signed-off-by: Doug Ledford <[email protected]>

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RDMA: Remove duplicated include from ib_addr.h

Remove duplicated include.

Signed-off-by: YueHaibing <[email protected]>
Reviewed-by: Leon Romanovsky <[email protected]>
Signed-off-by: Doug Le

RDMA: Remove duplicated include from ib_addr.h

Remove duplicated include.

Signed-off-by: YueHaibing <[email protected]>
Reviewed-by: Leon Romanovsky <[email protected]>
Signed-off-by: Doug Ledford <[email protected]>

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RDMA/core: Consider net ns of gid attribute for RoCE

When resolving destination address or route, when net namespace is
unavailable, refer to the net namespace of the netdevice of the SGID
attribute

RDMA/core: Consider net ns of gid attribute for RoCE

When resolving destination address or route, when net namespace is
unavailable, refer to the net namespace of the netdevice of the SGID
attribute. This is typically the case for requests arriving from the
network for RoCE ports.

Signed-off-by: Parav Pandit <[email protected]>
Signed-off-by: Leon Romanovsky <[email protected]>
Signed-off-by: Jason Gunthorpe <[email protected]>

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RDMA/core: Rename rdma_copy_addr to rdma_copy_src_l2_addr

Now that rdma_copy_addr() only copies the source addresses and all callers
are interested in copying only source addresses, simplify it to d

RDMA/core: Rename rdma_copy_addr to rdma_copy_src_l2_addr

Now that rdma_copy_addr() only copies the source addresses and all callers
are interested in copying only source addresses, simplify it to drop the
destination address argument.

Given that it only copies source layer2 addresses, rename it to
rdma_copy_src_l2_addr for better code readability.

Signed-off-by: Parav Pandit <[email protected]>
Reviewed-by: Daniel Jurgens <[email protected]>
Signed-off-by: Leon Romanovsky <[email protected]>
Signed-off-by: Jason Gunthorpe <[email protected]>

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RDMA/core: Constify dst_addr argument

Following APIs are not supposed to modify addr or dest_addr contents.
Therefore make those function argument const for better code
readability.

1. rdma_resolve

RDMA/core: Constify dst_addr argument

Following APIs are not supposed to modify addr or dest_addr contents.
Therefore make those function argument const for better code
readability.

1. rdma_resolve_ip()
2. rdma_addr_size()
3. rdma_resolve_addr()

Signed-off-by: Parav Pandit <[email protected]>
Reviewed-by: Daniel Jurgens <[email protected]>
Signed-off-by: Leon Romanovsky <[email protected]>
Signed-off-by: Jason Gunthorpe <[email protected]>

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IB/cm: Keep track of the sgid_attr that created the cm id

Hold reference to the the sgid_attr which is used in a cm_id until the
cm_id is destroyed.

Signed-off-by: Parav Pandit <[email protected]>

IB/cm: Keep track of the sgid_attr that created the cm id

Hold reference to the the sgid_attr which is used in a cm_id until the
cm_id is destroyed.

Signed-off-by: Parav Pandit <[email protected]>
Signed-off-by: Jason Gunthorpe <[email protected]>
Signed-off-by: Leon Romanovsky <[email protected]>

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RDMA/rdma_cm: Delete rdma_addr_client

The only thing it does is block module unload while work is posted from
rdma_resolve_ip().

However, this is not the right place to do this. The users of
rdma_r

RDMA/rdma_cm: Delete rdma_addr_client

The only thing it does is block module unload while work is posted from
rdma_resolve_ip().

However, this is not the right place to do this. The users of
rdma_resolve_ip() must ensure their own module does not unload until
rdma_resolve_ip() calls the callback, or until rdma_addr_cancel() is
called.

Similarly callers to rdma_addr_find_l2_eth_by_grh() must ensure their
module does not unload while they are calling code.

The only two users are already safe, so there is no need for this.

Signed-off-by: Leon Romanovsky <[email protected]>
Signed-off-by: Jason Gunthorpe <[email protected]>

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RDMA/ucma: Introduce safer rdma_addr_size() variants

There are several places in the ucma ABI where userspace can pass in a
sockaddr but set the address family to AF_IB. When that happens,
rdma_add

RDMA/ucma: Introduce safer rdma_addr_size() variants

There are several places in the ucma ABI where userspace can pass in a
sockaddr but set the address family to AF_IB. When that happens,
rdma_addr_size() will return a size bigger than sizeof struct sockaddr_in6,
and the ucma kernel code might end up copying past the end of a buffer
not sized for a struct sockaddr_ib.

Fix this by introducing new variants

int rdma_addr_size_in6(struct sockaddr_in6 *addr);
int rdma_addr_size_kss(struct __kernel_sockaddr_storage *addr);

that are type-safe for the types used in the ucma ABI and return 0 if the
size computed is bigger than the size of the type passed in. We can use
these new variants to check what size userspace has passed in before
copying any addresses.

Reported-by: <[email protected]>
Signed-off-by: Roland Dreier <[email protected]>
Signed-off-by: Jason Gunthorpe <[email protected]>

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IB/core: Move rdma_addr_find_l2_eth_by_grh to core_priv.h

Before commit [1], rdma_addr_find_l2_eth_by_grh() was an exported function
and therefore declaration in include/rdma/ib_addr.h was fine.

Bu

IB/core: Move rdma_addr_find_l2_eth_by_grh to core_priv.h

Before commit [1], rdma_addr_find_l2_eth_by_grh() was an exported function
and therefore declaration in include/rdma/ib_addr.h was fine.

But now that its scope is limited to ib_core module, its better to have it
in core_priv.h.

[1] commit 1060f8653414 ("IB/{core/cm}: Fix generating a return AH for
RoCEE")

Reviewed-by: Daniel Jurgens <[email protected]>
Signed-off-by: Parav Pandit <[email protected]>
Signed-off-by: Leon Romanovsky <[email protected]>
Signed-off-by: Jason Gunthorpe <[email protected]>

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IB/core: Remove rdma_resolve_ip_route() as exported symbol

rdma_resolve_ip_route() is used only by ib_core module. Therefore it is
removed as an exported symbol.

Reviewed-by: Daniel Jurgens <daniel

IB/core: Remove rdma_resolve_ip_route() as exported symbol

rdma_resolve_ip_route() is used only by ib_core module. Therefore it is
removed as an exported symbol.

Reviewed-by: Daniel Jurgens <[email protected]>
Signed-off-by: Parav Pandit <[email protected]>
Signed-off-by: Leon Romanovsky <[email protected]>
Signed-off-by: Jason Gunthorpe <[email protected]>

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RDMA/core: Simplify rdma_addr_get_sgid() to not support RoCE

Now that all callers who care about RoCE addresses have been
converted to use rdma_read_gids() simplify rdma_addr_get_sgid()
to only supp

RDMA/core: Simplify rdma_addr_get_sgid() to not support RoCE

Now that all callers who care about RoCE addresses have been
converted to use rdma_read_gids() simplify rdma_addr_get_sgid()
to only support real GID addresses.

Callers should only use it for OPA and IB transports.

The now deleted implementation for RoCE has several bugs related to IPv6
support and incorrect/inconsistent 'GID' addresses compared to the CM
paths.

Signed-off-by: Parav Pandit <[email protected]>
Reviewed-by: Daniel Jurgens <[email protected]>
Signed-off-by: Leon Romanovsky <[email protected]>
Signed-off-by: Jason Gunthorpe <[email protected]>

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RDMA/{core, cma}: Simplify rdma_translate_ip

Since no caller needs vlan, rdma_translate_ip is simplified to avoid
vlan pointer.

Signed-off-by: Parav Pandit <[email protected]>
Reviewed-by: Daniel

RDMA/{core, cma}: Simplify rdma_translate_ip

Since no caller needs vlan, rdma_translate_ip is simplified to avoid
vlan pointer.

Signed-off-by: Parav Pandit <[email protected]>
Reviewed-by: Daniel Jurgens <[email protected]>
Signed-off-by: Leon Romanovsky <[email protected]>
Signed-off-by: Jason Gunthorpe <[email protected]>

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IB/core: Removed unused function

rdma_addr_find_smac_by_sgid() is exported symbol not used by any kernel
module. Therefore its removed.

Signed-off-by: Parav Pandit <[email protected]>
Reviewed-by:

IB/core: Removed unused function

rdma_addr_find_smac_by_sgid() is exported symbol not used by any kernel
module. Therefore its removed.

Signed-off-by: Parav Pandit <[email protected]>
Reviewed-by: Daniel Jurgens <[email protected]>
Signed-off-by: Leon Romanovsky <[email protected]>
Signed-off-by: Jason Gunthorpe <[email protected]>

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IB/{core/cm}: Fix generating a return AH for RoCEE

When computing a UD reverse path (return AH) from a WC the code was not
doing a route lookup anchored in a specific netdevice. This caused several

IB/{core/cm}: Fix generating a return AH for RoCEE

When computing a UD reverse path (return AH) from a WC the code was not
doing a route lookup anchored in a specific netdevice. This caused several
bugs, including broken IPv6 link-local address support in RoCEv2. [1]

This fixes the lookup by determining the GID table entry that the HW
matched to the SGID for the WC and then using the netdevice from that
entry to perform the route and ND lookup for the 'DGID' to build a return
AH.

RoCE GID table management ensures that right upper netdevices of the
physical netdevices are added. Therefore init_ah_from_wc doesn't need to
perform such check.

Now that route lookup is done based on the netdevice of the GID entry,
simplify code to not have ifindex and vlan pointers. As part of that,
refactor to have netdevice as input parameter. This is already discussed
at [2].

Finally ib_init_ah_from_wc resolves dmac for unicast GID in similar way as
what ib_resolve_eth_dmac() does. So ib_resolve_eth_dmac is refactored to
split for unicast and non unicast GIDs, so that it can be reused by
ib_init_ah_from_wc.

While we are at refactoring ib_resolve_eth_dmac(), it is further
simplified

(a) to avoid hoplimit as optional parameter, as there is only one
user who always queries hoplimit.
(b) for empty line.
(c) avoided zero initialization of ret.
(d) removed as exported symbol as only ib core uses it.

For IPv6, this is tested using simple rping test as below.
rping -sv -a ::0
rping -c -a fe80::268a:7ff:fe55:4661%ens2f1 -C 1 -v -d

[1] https://www.spinics.net/lists/linux-rdma/msg45690.html
[2] https://www.spinics.net/lists/linux-rdma/msg45710.html

Signed-off-by: Parav Pandit <[email protected]>
Reviewed-by: Matan Barak <[email protected]>
Reviewed-by: Mark Bloch <[email protected]>
Reported-by: Roland Dreier <[email protected]>
Signed-off-by: Leon Romanovsky <[email protected]>
Signed-off-by: Jason Gunthorpe <[email protected]>

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RDMA/core: Make function rdma_copy_addr return void

Function returns zero - make it void.

While there make struct net_device const.

Signed-off-by: Yuval Shaia <[email protected]>
Reviewed-by:

RDMA/core: Make function rdma_copy_addr return void

Function returns zero - make it void.

While there make struct net_device const.

Signed-off-by: Yuval Shaia <[email protected]>
Reviewed-by: Parav Pandit <[email protected]>
Reviewed-by: Leon Romanovsky <[email protected]>
Signed-off-by: Doug Ledford <[email protected]>

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IB/core: Fix calculation of maximum RoCE MTU

The original code only took into consideration the largest header
possible after the IB_BTH_BYTES. This was incorrect, as the largest
possible header si

IB/core: Fix calculation of maximum RoCE MTU

The original code only took into consideration the largest header
possible after the IB_BTH_BYTES. This was incorrect, as the largest
possible header size is the largest possible combination of headers we
might run into. The new code accounts for all possible headers in the
largest possible combination and subtracts that from the MTU to make
sure that all packets will fit on the wire.

Link: https://www.spinics.net/lists/linux-rdma/msg54558.html
Fixes: 3c86aa70bf67 ("RDMA/cm: Add RDMA CM support for IBoE devices")
Signed-off-by: Parav Pandit <[email protected]>
Reviewed-by: Daniel Jurgens <[email protected]>
Reported-by: Roland Dreier <[email protected]>
Signed-off-by: Leon Romanovsky <[email protected]>
Signed-off-by: Doug Ledford <[email protected]>

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IB/core: Fix endianness annotation in rdma_is_multicast_addr()

Since ipv4_addr is a big endian 32-bit number, annotate it as such.

Fixes: commit be1d325a3358 ("IB/core: Set RoCEv2 MGID according to

IB/core: Fix endianness annotation in rdma_is_multicast_addr()

Since ipv4_addr is a big endian 32-bit number, annotate it as such.

Fixes: commit be1d325a3358 ("IB/core: Set RoCEv2 MGID according to spec")
Signed-off-by: Bart Van Assche <[email protected]>
Reviewed-by: Leon Romanovsky <[email protected]>
Signed-off-by: Doug Ledford <[email protected]>

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infiniband: avoid overflow warning

A sockaddr_in structure on the stack getting passed into rdma_ip2gid
triggers this warning, since we memcpy into a larger sockaddr_in6
structure:

In function 'mem

infiniband: avoid overflow warning

A sockaddr_in structure on the stack getting passed into rdma_ip2gid
triggers this warning, since we memcpy into a larger sockaddr_in6
structure:

In function 'memcpy',
inlined from 'rdma_ip2gid' at include/rdma/ib_addr.h:175:3,
inlined from 'addr_event.isra.4.constprop' at drivers/infiniband/core/roce_gid_mgmt.c:693:2,
inlined from 'inetaddr_event' at drivers/infiniband/core/roce_gid_mgmt.c:716:9:
include/linux/string.h:305:4: error: call to '__read_overflow2' declared with attribute error: detected read beyond size of object passed as 2nd parameter

The warning seems appropriate here, but the code is also clearly
correct, so we really just want to shut up this instance of the
output.

The best way I found so far is to avoid the memcpy() call and instead
replace it with a struct assignment.

Fixes: 6974f0c4555e ("include/linux/string.h: add the option of fortified string.h functions")
Cc: Daniel Micay <[email protected]>
Cc: Kees Cook <[email protected]>
Signed-off-by: Arnd Bergmann <[email protected]>
Signed-off-by: Doug Ledford <[email protected]>

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IB/core: Set RoCEv2 MGID according to spec

RoCEv2 Annex states that for RoCEv2 over IPv4, the corresponding
IPv4 address is encoded into the GID according to the following rule:
GID= :ffff:<IPv4 add

IB/core: Set RoCEv2 MGID according to spec

RoCEv2 Annex states that for RoCEv2 over IPv4, the corresponding
IPv4 address is encoded into the GID according to the following rule:
GID= :ffff:<IPv4 address>

Remove the 0xff0e prefix for RoCEv2 packets with IPv4 and leave it
zeroed and change rdma_is_multicast_addr() to consider the new logic.

Signed-off-by: Noa Osherovich <[email protected]>
Reviewed-by: Moni Shoua <[email protected]>
Signed-off-by: Leon Romanovsky <[email protected]>
Signed-off-by: Doug Ledford <[email protected]>

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IB/cma: Fix reference count leak when no ipv4 addresses are set

Once in_dev_get is called to receive in_device pointer, the
in_device reference counter is increased, but if there are
no ipv4 address

IB/cma: Fix reference count leak when no ipv4 addresses are set

Once in_dev_get is called to receive in_device pointer, the
in_device reference counter is increased, but if there are
no ipv4 addresses configured on the net-device the ifa_list
will be null, resulting in a flow that doesn't call in_dev_put
to decrease the ref_cnt.
This was exposed when running RoCE over ipv6 without any ipv4
addresses configured

Fixes: commit 8e3867310c90 ("IB/cma: Fix a race condition in iboe_addr_get_sgid()")

Signed-off-by: Michal Kalderon <[email protected]>
Signed-off-by: Ariel Elior <[email protected]>
Signed-off-by: Doug Ledford <[email protected]>

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net-next: treewide use is_vlan_dev() helper function.

This patch makes use of is_vlan_dev() function instead of flag
comparison which is exactly done by is_vlan_dev() helper function.

Signed-off-by

net-next: treewide use is_vlan_dev() helper function.

This patch makes use of is_vlan_dev() function instead of flag
comparison which is exactly done by is_vlan_dev() helper function.

Signed-off-by: Parav Pandit <[email protected]>
Reviewed-by: Daniel Jurgens <[email protected]>
Acked-by: Stephen Hemminger <[email protected]>
Acked-by: Jon Maxwell <[email protected]>
Acked-by: Johannes Thumshirn <[email protected]>
Acked-by: Haiyang Zhang <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

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