- 13 Apr, 2019 13 commits
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David S. Miller authored
NeilBrown says: ==================== Fix rhashtable bit-locking for m68k As reported by Guenter Roeck, the new rhashtable bit-locking doesn't work on m68k as it only requires 2-byte alignment, so BIT(1) is addresses is not unused. We current use BIT(0) to identify a NULLS marker, but that is only needed in ->next pointers. The bucket head does not need a NULLS marker, so the lsb there can be used for locking. the first 4 patches make some small improvements and re-arrange some code. The final patch converts to using only BIT(0) for these two different special purposes. I had previously suggested dropping the series until I fix it. Given that this was fairly easy, I retract that I think it best simply to add these patches to fix the code. ==================== Tested-by:
Guenter Roeck <linux@roeck-us.net> Signed-off-by:
David S. Miller <davem@davemloft.net>
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NeilBrown authored
As reported by Guenter Roeck, the new bit-locking using BIT(1) doesn't work on the m68k architecture. m68k only requires 2-byte alignment for words and longwords, so there is only one unused bit in pointers to structs - We current use two, one for the NULLS marker at the end of the linked list, and one for the bit-lock in the head of the list. The two uses don't need to conflict as we never need the head of the list to be a NULLS marker - the marker is only needed to check if an object has moved to a different table, and the bucket head cannot move. The NULLS marker is only needed in a ->next pointer. As we already have different types for the bucket head pointer (struct rhash_lock_head) and the ->next pointers (struct rhash_head), it is fairly easy to treat the lsb differently in each. So: Initialize buckets heads to NULL, and use the lsb for locking. When loading the pointer from the bucket head, if it is NULL (ignoring the lock big), report as being the expected NULLS marker. When storing a value into a bucket head, if it is a NULLS marker, store NULL instead. And convert all places that used bit 1 for locking, to use bit 0. Fixes: 8f0db018 ("rhashtable: use bit_spin_locks to protect hash bucket.") Reported-by:
NeilBrown <neilb@suse.com> Signed-off-by:
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NeilBrown authored
The only times rht_ptr_locked() is used, it is to store a new value in a bucket-head. This is the only time it makes sense to use it too. So replace it by a function which does the whole task: Sets the lock bit and assigns to a bucket head. Signed-off-by:
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NeilBrown authored
Rather than dereferencing a pointer to a bucket and then passing the result to rht_ptr(), we now pass in the pointer and do the dereference in rht_ptr(). This requires that we pass in the tbl and hash as well to support RCU checks, and means that the various rht_for_each functions can expect a pointer that can be dereferenced without further care. There are two places where we dereference a bucket pointer where there is no testable protection - in each case we know that we much have exclusive access without having taken a lock. The previous code used rht_dereference() to pretend that holding the mutex provided protects, but holding the mutex never provides protection for accessing buckets. So instead introduce rht_ptr_exclusive() that can be used when there is known to be exclusive access without holding any locks. Signed-off-by:
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NeilBrown authored
This patch only moves some code around, it doesn't change the code at all. A subsequent patch will benefit from this as it needs to add calls to functions which are now defined before the call-site, but weren't before. Signed-off-by:
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NeilBrown authored
With these annotations, the rhashtable now gets no warnings when compiled with "C=1" for sparse checking. Signed-off-by:
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Gustavo A. R. Silva authored
One of the more common cases of allocation size calculations is finding the size of a structure that has a zero-sized array at the end, along with memory for some number of elements for that array. For example: struct foo { int stuff; struct boo entry[]; }; size = sizeof(struct foo) + count * sizeof(struct boo); instance = kvzalloc(size, GFP_KERNEL); Instead of leaving these open-coded and prone to type mistakes, we can now use the new struct_size() helper: instance = kvzalloc(struct_size(instance, entry, count), GFP_KERNEL); This code was detected with the help of Coccinelle. Signed-off-by:Gustavo A. R. Silva <gustavo@embeddedor.com> Signed-off-by:
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David S. Miller authored
Jakub Kicinski says: ==================== nfp: update to control structures This series prepares NFP control structures for crypto offloads. So far we mostly dealt with configuration requests under rtnl lock. This will no longer be the case with crypto. Additionally we will try to reuse the BPF control message format, so we move common code out of BPF. ==================== Signed-off-by: -
Jakub Kicinski authored
BPF's control message handler seems like a good base to built on for request-reply control messages. Split it out to allow for reuse. Signed-off-by:
Jakub Kicinski <jakub.kicinski@netronome.com> Reviewed-by:
Dirk van der Merwe <dirk.vandermerwe@netronome.com> Signed-off-by:
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Jakub Kicinski authored
During probe we clear vNIC configuration in case the device wasn't closed cleanly by previous driver. Move that code before netdev init, so netdev init can already try to apply its config parameters. Signed-off-by:
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Jakub Kicinski authored
Soon we will try to write to the vNIC mailbox without RTNL held. Add a new mutex to protect access to specific parts of the PCI control BAR. Move the mailbox size checking to the mailbox lock() helper, where it can be more effective (happen prior to potential overwrite of other data). Signed-off-by:
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Dirk van der Merwe authored
If the reconfig was a quick update, we could have results available from firmware within 200us. Signed-off-by:
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David Ahern authored
In the review of 0b34eb00 ("ipv6: Refactor __ip6_route_redirect"), Martin noted that the flowi6_oif compare is moved to the new helper and should be removed from __ip6_route_redirect. Fix the oversight. Fixes: 0b34eb00 ("ipv6: Refactor __ip6_route_redirect") Reported-by:
Martin Lau <kafai@fb.com> Signed-off-by:
David Ahern <dsahern@gmail.com> Signed-off-by:
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- 12 Apr, 2019 27 commits
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David S. Miller authored
Jiri Pirko says: ==================== netdevsim: Mostly cleanup in sdev/bpf iface area This patches does mainly internal netdevsim code shuffle. Nothing serious, just small changes to help readability and preparations for future work. ==================== Signed-off-by: -
Jiri Pirko authored
In order to improve readability and prepare for future code changes, move sdev specific init/uninit code into separate functions. Signed-off-by:
Jiri Pirko <jiri@mellanox.com> Signed-off-by:
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Jiri Pirko authored
offload dev is stored in sdev struct. However, first netdevsim instance is used as a priv. Change this to be sdev to as it is shared among multiple netdevsim instances. Signed-off-by:
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Jiri Pirko authored
Some netdevsim bpf debugfs files are per-sdev, yet they are defined per netdevsim instance. Move them under sdev directory. Signed-off-by:
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Jiri Pirko authored
To make code easier to read, move shared dev bits into a separate file. Signed-off-by:
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Ioana Ciornei authored
This patch also performs some minor adjustments such as numbering for the receive path sequence, conversion of keywords to inline literals and adding an index page so it looks better in the output of 'make htmldocs'. Signed-off-by:
Ioana Ciornei <ciorneiioana@gmail.com> Signed-off-by:
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Julian Wiedmann authored
For reporting the common set of SW timestamping capabilities, use ethtool_op_get_ts_info() instead of re-implementing it. Signed-off-by:
Julian Wiedmann <jwi@linux.ibm.com> Signed-off-by:
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Julian Wiedmann authored
For reporting the common set of SW timestamping capabilities, use ethtool_op_get_ts_info() instead of re-implementing it. Signed-off-by:
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Julian Wiedmann authored
For reporting the common set of SW timestamping capabilities, use ethtool_op_get_ts_info() instead of re-implementing it. Signed-off-by:
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David S. Miller authored
Ursula Braun says: ==================== net/smc: patches 2019-04-12 here are patches for SMC: * patch 1 improves behavior of non-blocking connect * patches 2, 3, 5, 7, and 8 improve connecting return codes * patches 4 and 6 are a cleanups without functional change ==================== Signed-off-by: -
Karsten Graul authored
Rework smc_conn_create() to always return a valid DECLINE reason code. This removes the need to translate the return codes on 4 different places and allows to easily add more detailed return codes by changing smc_conn_create() only. Signed-off-by:
Karsten Graul <kgraul@linux.ibm.com> Signed-off-by:
Ursula Braun <ubraun@linux.ibm.com> Signed-off-by:
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Karsten Graul authored
Rework smc_listen_work() to provide improved reason codes when an SMC connection is declined. This allows better debugging on user side. This also adds 3 more detailed reason codes in smc_clc.h to indicate what type of device was not found (ism or rdma or both), or if ism cannot talk to the peer. Signed-off-by:
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Karsten Graul authored
In smc_listen_work() the variables rc and reason_code are defined which have the same meaning. Eliminate reason_code in favor of the shorter name rc. No functional changes. Rename the functions smc_check_ism() and smc_check_rdma() into smc_find_ism_device() and smc_find_rdma_device() to make there purpose more clear. No functional changes. Signed-off-by:
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Karsten Graul authored
The vlan_id of the underlying CLC socket was retrieved two times during processing of the listen handshaking. Change this to get the vlan id one time in connect and in listen processing, and reuse the id. And add a new CLC DECLINE return code for the case when the retrieval of the vlan id failed. Signed-off-by:
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Karsten Graul authored
During initialization of an SMC socket a lot of function parameters need to get passed down the function call path. Consolidate the parameters in a helper struct so there are less enough parameters to get all passed by register. Signed-off-by:
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Karsten Graul authored
The check for a matching ip prefix and subnet was only done for SMC-R in smc_listen_rdma_check() but not when an SMC-D connection was possible. Rename the function into smc_listen_prfx_check() and move its call to a place where it is called for both SMC variants. And add a new CLC DECLINE reason for the case when the IP prefix or subnet check fails so the reason for the failing SMC connection can be found out more easily. Signed-off-by:
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Karsten Graul authored
Correct the CLC decline reason codes for internal problems to not have the sign bit set, negative reason codes are interpreted as not eligible for TCP fallback. Signed-off-by:
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Ursula Braun authored
For nonblocking sockets move the kernel_connect() from the connect worker into the initial smc_connect part to return kernel_connect() errors other than -EINPROGRESS to user space. Reviewed-by:
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Dongli Zhang authored
During coredump analysis, it is not easy to obtain the address of backend_info in xen-netback. So far there are two ways to obtain backend_info: 1. Do what xenbus_device_find() does for vmcore to find the xenbus_device and then derive it from dev_get_drvdata(). 2. Extract backend_info from callstack of xenwatch (e.g., netback_remove() or frontend_changed()). This patch adds a reference from xenvif to backend_info so that it would be much more easier to obtain backend_info during coredump analysis. Signed-off-by:
Dongli Zhang <dongli.zhang@oracle.com> Acked-by:
Wei Liu <wei.liu2@citrix.com> Signed-off-by:
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David S. Miller authored
David Miller says: ==================== SCTP: Event skb list overhaul. This patch series eliminates the explicit reference to the skb list implementation via skb->prev dereferences. The approach used is to pass a non-empty skb list around instead of an event skb object which may or may not be on a list. I'd like to thank Marcelo Leitner, Xin Long, and Neil Horman for reviewing previous versions of this series. Testing would be very much appreciated, in addition to the review of course. v4 --> v5: Rebase to net-next v3 --> v4: Fix the logic in patch #4 so that we don't miss cases where we should add event to the on-stack temp list. ==================== Signed-off-by: -
David Miller authored
Now the SKB list implementation assumption can be removed. And now that we know that the list head is always non-NULL we can remove the code blocks dealing with that as well. Signed-off-by:
Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Signed-off-by:
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David Miller authored
Pass this, instead of an event. Then everything trickles down and we always have events a non-empty list. Then we needs a list creating stub to place into .enqueue_event for sctp_stream_interleave_1. Signed-off-by:
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David Miller authored
This way we can make sure events sent this way to sctp_ulpq_tail_event() are on a list as well. Now all such code paths are fully covered. Signed-off-by:
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David Miller authored
This way we can simplify the logic and remove assumptions about the implementation of skb lists. Signed-off-by:
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David Miller authored
Inside the loop, we always start with event non-NULL. Signed-off-by:
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Vlad Buslov authored
Fix net reference counting in fl_change() and remove redundant call to tcf_exts_get_net() from __fl_delete(). __fl_put() already tries to get net before releasing exts and deallocating a filter, so this code caused flower classifier to obtain net twice per filter that is being deleted. Implementation of __fl_delete() called tcf_exts_get_net() to pass its result as 'async' flag to fl_mask_put(). However, 'async' flag is redundant and only complicates fl_mask_put() implementation. This functionality seems to be copied from filter cleanup code, where it was added by Cong with following explanation: This patchset tries to fix the race between call_rcu() and cleanup_net() again. Without holding the netns refcnt the tc_action_net_exit() in netns workqueue could be called before filter destroy works in tc filter workqueue. This patchset moves the netns refcnt from tc actions to tcf_exts, without breaking per-netns tc actions. This doesn't apply to flower mask, which doesn't call any tc action code during cleanup. Simplify fl_mask_put() by removing the flag parameter and always use tcf_queue_work() to free mask objects. Fixes: 06177558 ("net: sched: flower: introduce reference counting for filters") Fixes: 1f17f774 ("net: sched: flower: insert filter to ht before offloading it to hw") Fixes: 05cd271f ("cls_flower: Support multiple masks per priority") Reported-by:Ido Schimmel <idosch@mellanox.com> Signed-off-by:
Vlad Buslov <vladbu@mellanox.com> Signed-off-by:
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David Ahern authored
pmtu.sh script runs a number of tests and dumps a summary of pass/fail. If a test fails, it is near impossible to debug why. For example: TEST: ipv6: PMTU exceptions [FAIL] There are a lot of commands run behind the scenes for this test. Which one is failing? Add a VERBOSE option to show commands that are run and any output from those commands. Add a PAUSE_ON_FAIL option to halt the script if a test fails allowing users to poke around with the setup in the failed state. In the process, rename tracing to TRACING and move declaration to top with the new variables. Signed-off-by:Stefano Brivio <sbrivio@redhat.com> Signed-off-by:
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