1. 02 Nov, 2017 1 commit
    • Greg Kroah-Hartman's avatar
      License cleanup: add SPDX GPL-2.0 license identifier to files with no license · b2441318
      Greg Kroah-Hartman authored
      Many source files in the tree are missing licensing information, which
      makes it harder for compliance tools to determine the correct license.
      
      By default all files without license information are under the default
      license of the kernel, which is GPL version 2.
      
      Update the files which contain no license information with the 'GPL-2.0'
      SPDX license identifier.  The SPDX identifier is a legally binding
      shorthand, which can be used instead of the full boiler plate text.
      
      This patch is based on work done by Thomas Gleixner and Kate Stewart and
      Philippe Ombredanne.
      
      How this work was done:
      
      Patches were generated and checked against linux-4.14-rc6 for a subset of
      the use cases:
       - file had no licensing information it it.
       - file was a */uapi/* one with no licensing information in it,
       - file was a */uapi/* one with existing licensing information,
      
      Further patches will be generated in subsequent months to fix up cases
      where non-standard license headers were used, and references to license
      had to be inferred by heuristics based on keywords.
      
      The analysis to determine which SPDX License Identifier to be applied to
      a file was done in a spreadsheet of side by side results from of the
      output of two independent scanners (ScanCode & Windriver) producing SPDX
      tag:value files created by Philippe Ombredanne.  Philippe prepared the
      base worksheet, and did an initial spot review of a few 1000 files.
      
      The 4.13 kernel was the starting point of the analysis with 60,537 files
      assessed.  Kate Stewart did a file by file comparison of the scanner
      results in the spreadsheet to determine which SPDX license identifier(s)
      to be applied to the file. She confirmed any determination that was not
      immediately clear with lawyers working with the Linux Foundation.
      
      Criteria used to select files for SPDX license identifier tagging was:
       - Files considered eligible had to be source code files.
       - Make and config files were included as candidates if they contained >5
         lines of source
       - File already had some variant of a license header in it (even if <5
         lines).
      
      All documentation files were explicitly excluded.
      
      The following heuristics were used to determine which SPDX license
      identifiers to apply.
      
       - when both scanners couldn't find any license traces, file was
         considered to have no license information in it, and the top level
         COPYING file license applied.
      
         For non */uapi/* files that summary was:
      
         SPDX license identifier                            # files
         ---------------------------------------------------|-------
         GPL-2.0                                              11139
      
         and resulted in the first patch in this series.
      
         If that file was a */uapi/* path one, it was "GPL-2.0 WITH
         Linux-syscall-note" otherwise it was "GPL-2.0".  Results of that was:
      
         SPDX license identifier                            # files
         ---------------------------------------------------|-------
         GPL-2.0 WITH Linux-syscall-note                        930
      
         and resulted in the second patch in this series.
      
       - if a file had some form of licensing information in it, and was one
         of the */uapi/* ones, it was denoted with the Linux-syscall-note if
         any GPL family license was found in the file or had no licensing in
         it (per prior point).  Results summary:
      
         SPDX license identifier                            # files
         ---------------------------------------------------|------
         GPL-2.0 WITH Linux-syscall-note                       270
         GPL-2.0+ WITH Linux-syscall-note                      169
         ((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause)    21
         ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause)    17
         LGPL-2.1+ WITH Linux-syscall-note                      15
         GPL-1.0+ WITH Linux-syscall-note                       14
         ((GPL-2.0+ WITH Linux-syscall-note) OR BSD-3-Clause)    5
         LGPL-2.0+ WITH Linux-syscall-note                       4
         LGPL-2.1 WITH Linux-syscall-note                        3
         ((GPL-2.0 WITH Linux-syscall-note) OR MIT)              3
         ((GPL-2.0 WITH Linux-syscall-note) AND MIT)             1
      
         and that resulted in the third patch in this series.
      
       - when the two scanners agreed on the detected license(s), that became
         the concluded license(s).
      
       - when there was disagreement between the two scanners (one detected a
         license but the other didn't, or they both detected different
         licenses) a manual inspection of the file occurred.
      
       - In most cases a manual inspection of the information in the file
         resulted in a clear resolution of the license that should apply (and
         which scanner probably needed to revisit its heuristics).
      
       - When it was not immediately clear, the license identifier was
         confirmed with lawyers working with the Linux Foundation.
      
       - If there was any question as to the appropriate license identifier,
         the file was flagged for further research and to be revisited later
         in time.
      
      In total, over 70 hours of logged manual review was done on the
      spreadsheet to determine the SPDX license identifiers to apply to the
      source files by Kate, Philippe, Thomas and, in some cases, confirmation
      by lawyers working with the Linux Foundation.
      
      Kate also obtained a third independent scan of the 4.13 code base from
      FOSSology, and compared selected files where the other two scanners
      disagreed against that SPDX file, to see if there was new insights.  The
      Windriver scanner is based on an older version of FOSSology in part, so
      they are related.
      
      Thomas did random spot checks in about 500 files from the spreadsheets
      for the uapi headers and agreed with SPDX license identifier in the
      files he inspected. For the non-uapi files Thomas did random spot checks
      in about 15000 files.
      
      In initial set of patches against 4.14-rc6, 3 files were found to have
      copy/paste license identifier errors, and have been fixed to reflect the
      correct identifier.
      
      Additionally Philippe spent 10 hours this week doing a detailed manual
      inspection and review of the 12,461 patched files from the initial patch
      version early this week with:
       - a full scancode scan run, collecting the matched texts, detected
         license ids and scores
       - reviewing anything where there was a license detected (about 500+
         files) to ensure that the applied SPDX license was correct
       - reviewing anything where there was no detection but the patch license
         was not GPL-2.0 WITH Linux-syscall-note to ensure that the applied
         SPDX license was correct
      
      This produced a worksheet with 20 files needing minor correction.  This
      worksheet was then exported into 3 different .csv files for the
      different types of files to be modified.
      
      These .csv files were then reviewed by Greg.  Thomas wrote a script to
      parse the csv files and add the proper SPDX tag to the file, in the
      format that the file expected.  This script was further refined by Greg
      based on the output to detect more types of files automatically and to
      distinguish between header and source .c files (which need different
      comment types.)  Finally Greg ran the script using the .csv files to
      generate the patches.
      Reviewed-by: default avatarKate Stewart <kstewart@linuxfoundation.org>
      Reviewed-by: default avatarPhilippe Ombredanne <pombredanne@nexb.com>
      Reviewed-by: default avatarThomas Gleixner <tglx@linutronix.de>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      b2441318
  2. 07 Jan, 2017 1 commit
    • Xin Long's avatar
      sctp: prepare asoc stream for stream reconf · a8386317
      Xin Long authored
      sctp stream reconf, described in RFC 6525, needs a structure to
      save per stream information in assoc, like stream state.
      
      In the future, sctp stream scheduler also needs it to save some
      stream scheduler params and queues.
      
      This patchset is to prepare the stream array in assoc for stream
      reconf. It defines sctp_stream that includes stream arrays inside
      to replace ssnmap.
      
      Note that we use different structures for IN and OUT streams, as
      the members in per OUT stream will get more and more different
      from per IN stream.
      
      v1->v2:
        - put these patches into a smaller group.
      v2->v3:
        - define sctp_stream to contain stream arrays, and create stream.c
          to put stream-related functions.
        - merge 3 patches into 1, as new sctp_stream has the same name
          with before.
      Signed-off-by: default avatarXin Long <lucien.xin@gmail.com>
      Reviewed-by: default avatarMarcelo Ricardo Leitner <marcelo.leitner@gmail.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      a8386317
  3. 03 Jun, 2016 1 commit
    • Marcelo Ricardo Leitner's avatar
      sctp: Add GSO support · 90017acc
      Marcelo Ricardo Leitner authored
      SCTP has this pecualiarity that its packets cannot be just segmented to
      (P)MTU. Its chunks must be contained in IP segments, padding respected.
      So we can't just generate a big skb, set gso_size to the fragmentation
      point and deliver it to IP layer.
      
      This patch takes a different approach. SCTP will now build a skb as it
      would be if it was received using GRO. That is, there will be a cover
      skb with protocol headers and children ones containing the actual
      segments, already segmented to a way that respects SCTP RFCs.
      
      With that, we can tell skb_segment() to just split based on frag_list,
      trusting its sizes are already in accordance.
      
      This way SCTP can benefit from GSO and instead of passing several
      packets through the stack, it can pass a single large packet.
      
      v2:
      - Added support for receiving GSO frames, as requested by Dave Miller.
      - Clear skb->cb if packet is GSO (otherwise it's not used by SCTP)
      - Added heuristics similar to what we have in TCP for not generating
        single GSO packets that fills cwnd.
      v3:
      - consider sctphdr size in skb_gso_transport_seglen()
      - rebased due to 5c7cdf33 ("gso: Remove arbitrary checks for
        unsupported GSO")
      Signed-off-by: default avatarMarcelo Ricardo Leitner <marcelo.leitner@gmail.com>
      Tested-by: default avatarXin Long <lucien.xin@gmail.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      90017acc
  4. 15 Apr, 2016 1 commit
    • Xin Long's avatar
      sctp: add the sctp_diag.c file · 8f840e47
      Xin Long authored
      This one will implement all the interface of inet_diag, inet_diag_handler.
      which includes sctp_diag_dump, sctp_diag_dump_one and sctp_diag_get_info.
      
      It will work as a module, and register inet_diag_handler when loading.
      
      v2->v3:
      - fix the mistake in inet_assoc_attr_size().
      
      - change inet_diag_msg_laddrs_fill() name to inet_diag_msg_sctpladdrs_fill.
      
      - change inet_diag_msg_paddrs_fill() name to inet_diag_msg_sctpaddrs_fill.
      
      - add inet_diag_msg_sctpinfo_fill() to make asoc/ep fill code clearer.
      
      - add inet_diag_msg_sctpasoc_fill() to make asoc fill code clearer.
      
      - merge inet_asoc_diag_fill() and inet_ep_diag_fill() to
        inet_sctp_diag_fill().
      
      - call sctp_diag_get_info() directly, instead by handler, cause the caller
        is in the same file with it.
      
      - call lock_sock in sctp_tsp_dump_one() to make sure we call get sctp info
        safely.
      
      - after lock_sock(sk), we should check sk != assoc->base.sk.
      
      - change mem[SK_MEMINFO_WMEM_ALLOC] to asoc->sndbuf_used for asoc dump when
        asoc->ep->sndbuf_policy is set. don't use INET_DIAG_MEMINFO attr any more.
      Signed-off-by: default avatarXin Long <lucien.xin@gmail.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      8f840e47
  5. 08 Jul, 2014 1 commit
  6. 01 May, 2010 1 commit
    • Wei Yongjun's avatar
      sctp: implement sctp association probing module · 787a51a0
      Wei Yongjun authored
      This patch implement sctp association probing module, the module
      will be called sctp_probe.
      
      This module allows for capturing the changes to SCTP association
      state in response to incoming packets. It is used for debugging
      SCTP congestion control algorithms.
      
      Usage:
        $ modprobe sctp_probe [full=n] [port=n] [bufsize=n]
        $ cat /proc/net/sctpprobe
      
        The output format is:
          TIME     ASSOC     LPORT RPORT MTU    RWND  UNACK <REMOTE-ADDR   STATE  CWND   SSTHRESH  INFLIGHT  PARTIAL_BYTES_ACKED MTU> ...
      
        The output will be like this:
          9.226086 c4064c48  9000  8000  1500    53352     1 *192.168.0.19  1     4380    54784     1252        0     1500
          9.287195 c4064c48  9000  8000  1500    45144     5 *192.168.0.19  1     5880    54784     6500        0     1500
          9.289130 c4064c48  9000  8000  1500    42724     5 *192.168.0.19  1     7380    54784     6500        0     1500
          9.620332 c4064c48  9000  8000  1500    48284     4 *192.168.0.19  1     8880    54784     5200        0     1500
          ......
      Signed-off-by: default avatarWei Yongjun <yjwei@cn.fujitsu.com>
      Signed-off-by: default avatarVlad Yasevich <vladislav.yasevich@hp.com>
      787a51a0
  7. 19 Jul, 2008 1 commit
  8. 28 Jan, 2008 1 commit
  9. 10 Oct, 2007 1 commit
  10. 16 Apr, 2005 1 commit
    • Linus Torvalds's avatar
      Linux-2.6.12-rc2 · 1da177e4
      Linus Torvalds authored
      Initial git repository build. I'm not bothering with the full history,
      even though we have it. We can create a separate "historical" git
      archive of that later if we want to, and in the meantime it's about
      3.2GB when imported into git - space that would just make the early
      git days unnecessarily complicated, when we don't have a lot of good
      infrastructure for it.
      
      Let it rip!
      1da177e4