src/sys/dev/netmap/netmap_generic.c, branch release/12.2.0

MFC r349966

2019-07-15T20:12:54Z

netmap: fix bug introduced by r349752 r349752 introduced a NULL pointer reference bug in the emulated netmap code. Reported by: lwhsu

MFC r349752

2019-07-11T20:13:51Z

netmap: fix kernel pointer printing in netmap_generic.c Print the adapter name rather than the address of the adapter to avoid kernel address leakage. PR: Bug 238642 Submitted by: Fuqian Huang Reviewed by: vmaffione

MFC r343772, r343867

2019-02-12T09:07:46Z

netmap: refactor logging macros and pipes Changelist: - Replace ND, D and RD macros with nm_prdis, nm_prinf, nm_prerr and nm_prlim, to avoid possible naming conflicts. - Add netmap_krings_mode_commit() helper function and use that to reduce code duplication. - Refactor pipes control code to export some functions that can be reused by the veth driver (on Linux) and epair(4). - Add check to reject API requests with version less than 11. - Small code refactoring for the null adapter.

MFC r341516, r341589

2018-12-11T11:31:13Z

netmap: align codebase to the current upstream (760279cfb2730a585) Changelist: - Replace netmap passthrough host support with a more general mechanism to call TXSYNC/RXSYNC from an in-kernel event-loop. No kernel threads are used to use this feature: the application is required to spawn a thread (or a process) and issue a SYNC_KLOOP_START (NIOCCTRL) command in the thread body. The kernel loop is executed by the ioctl implementation, which returns to userspace only when a different thread calls SYNC_KLOOP_STOP or the netmap file descriptor is closed. - Update the if_ptnet driver to cope with the new data structures, and prune all the obsolete ptnetmap code. - Add support for "null" netmap ports, useful to allocate netmap_if, netmap_ring and netmap buffers to be used by specialized applications (e.g. hypervisors). TXSYNC/RXSYNC on these ports have no effect. - Various fixes and code refactoring. Sponsored by: Sunny Valley Networks Differential Revision: https://reviews.freebsd.org/D18015

MFC r339639:

2018-10-30T08:36:36Z

netmap: align codebase to the current upstream (sha 8374e1a7e6941) Changelist: - Move large parts of VALE code to a new file and header netmap_bdg.[ch]. This is useful to reuse the code within upcoming projects. - Improvements and bug fixes to pipes and monitors. - Introduce nm_os_onattach(), nm_os_onenter() and nm_os_onexit() to handle differences between FreeBSD and Linux. - Introduce some new helper functions to handle more host rings and fake rings (netmap_all_rings(), netmap_real_rings(), ...) - Added new sysctl to enable/disable hw checksum in emulated netmap mode. - nm_inject: add support for NS_MOREFRAG Approved by: re (gjb)

netmap: pull fix for 32-bit support from upstream

2018-05-18T03:38:17Z

Approved by: sbruno

netmap: align codebase to the current upstream (commit id 3fb001303718146)

2018-04-12T07:20:50Z

Changelist: - Turn tx_rings and rx_rings arrays into arrays of pointers to kring structs. This patch includes fixes for ixv, ixl, ix, re, cxgbe, iflib, vtnet and ptnet drivers to cope with the change. - Generalize the nm_config() callback to accept a struct containing many parameters. - Introduce NKR_FAKERING to support buffers sharing (used for netmap pipes) - Improved API for external VALE modules. - Various bug fixes and improvements to the netmap memory allocator, including support for externally (userspace) allocated memory. - Refactoring of netmap pipes: now linked rings share the same netmap buffers, with a separate set of kring pointers (rhead, rcur, rtail). Buffer swapping does not need to happen anymore. - Large refactoring of the control API towards an extensible solution; the goal is to allow the addition of more commands and extension of existing ones (with new options) without the need of hacks or the risk of running out of configuration space. A new NIOCCTRL ioctl has been added to handle all the requests of the new control API, which cover all the functionalities so far supported. The netmap API bumps from 11 to 12 with this patch. Full backward compatibility is provided for the old control command (NIOCREGIF), by means of a new netmap_legacy module. Many parts of the old netmap.h header has now been moved to netmap_legacy.h (included by netmap.h). Approved by: hrs (mentor)

netmap: align codebase to upstream version v11.4

2018-04-09T09:24:26Z

Changelist: - remove unused nkr_slot_flags - new nm_intr adapter callback to enable/disable interrupts - remove unused sysctls and document the other sysctls - new infrastructure to support NS_MOREFRAG for NIC ports - support for external memory allocator (for now linux-only), including linux-specific changes in common headers - optimizations within netmap pipes datapath - improvements on VALE control API - new nm_parse() helper function in netmap_user.h - various bug fixes and code clean up Approved by: hrs (mentor)

sys/dev: further adoption of SPDX licensing ID tags.

2017-11-27T14:52:40Z

Mainly focus on files that use BSD 2-Clause license, however the tool I was using misidentified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts.

Shorten list of arguments to mbuf external storage freeing function.

2017-10-09T20:35:31Z

All of these arguments are stored in m_ext, so there is no reason to pass them in the argument list. Not all functions need the second argument, some don't even need the first one. The second argument lives in next cache line, so not dereferencing it is a performance gain. This was discovered in sendfile(2), which will be covered by next commits. The second goal of this commit is to bring even more flexibility to m_ext mbufs, allowing to create more fields in m_ext, opaque to the generic mbuf code, and potentially set and dereferenced by subsystems. Reviewed by: gallatin, kbowling Differential Revision: https://reviews.freebsd.org/D12615