1. 22 Aug, 2018 1 commit
  2. 18 May, 2018 1 commit
    • David Howells's avatar
      proc: Add a way to make network proc files writable · 564def71
      David Howells authored
      Provide two extra functions, proc_create_net_data_write() and
      proc_create_net_single_write() that act like their non-write versions but
      also set a write method in the proc_dir_entry struct.
      
      An internal simple write function is provided that will copy its buffer and
      hand it to the pde->write() method if available (or give an error if not).
      The buffer may be modified by the write method.
      Signed-off-by: default avatarDavid Howells <dhowells@redhat.com>
      564def71
  3. 16 May, 2018 6 commits
  4. 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
  5. 09 Sep, 2017 1 commit
  6. 17 Nov, 2016 1 commit
  7. 31 Oct, 2016 1 commit
    • Andrey Vagin's avatar
      net: add an ioctl to get a socket network namespace · c62cce2c
      Andrey Vagin authored
      Each socket operates in a network namespace where it has been created,
      so if we want to dump and restore a socket, we have to know its network
      namespace.
      
      We have a socket_diag to get information about sockets, it doesn't
      report sockets which are not bound or connected.
      
      This patch introduces a new socket ioctl, which is called SIOCGSKNS
      and used to get a file descriptor for a socket network namespace.
      
      A task must have CAP_NET_ADMIN in a target network namespace to
      use this ioctl.
      
      Cc: "David S. Miller" <davem@davemloft.net>
      Cc: Eric W. Biederman <ebiederm@xmission.com>
      Signed-off-by: default avatarAndrei Vagin <avagin@openvz.org>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      c62cce2c
  8. 17 Sep, 2014 1 commit
  9. 04 Jun, 2014 1 commit
  10. 01 May, 2013 9 commits
  11. 29 Apr, 2013 3 commits
  12. 09 Apr, 2013 6 commits
  13. 19 Feb, 2013 1 commit
    • Gao feng's avatar
      net: proc: fix build failed when procfs is not configured · 4fc1a601
      Gao feng authored
      commit d4beaa66
      "net: proc: change proc_net_fops_create to proc_create"
      uses proc_create to replace proc_net_fops_create, when
      CONFIG_PROC isn't configured, some build error will
      occurs.
      
      net/packet/af_packet.c: In function 'packet_net_init':
      net/packet/af_packet.c:3831:48: error: 'packet_seq_fops' undeclared (first use in this function)
      net/packet/af_packet.c:3831:48: note: each undeclared identifier is reported only once for each function it appears in
      
      There may be other build fails like above,this patch
      change proc_create from function to macros when CONFIG_PROC
      is not configured,just like what proc_net_fops_create did
      before this commit.
      Reported-by: default avatarFengguang Wu <fengguang.wu@intel.com>
      Signed-off-by: default avatarGao feng <gaofeng@cn.fujitsu.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      4fc1a601
  14. 18 Feb, 2013 2 commits
  15. 19 Jan, 2013 1 commit
    • Joe Millenbach US's avatar
      tty: Added a CONFIG_TTY option to allow removal of TTY · 4f73bc4d
      Joe Millenbach US authored
      The option allows you to remove TTY and compile without errors. This
      saves space on systems that won't support TTY interfaces anyway.
      bloat-o-meter output is below.
      
      The bulk of this patch consists of Kconfig changes adding "depends on
      TTY" to various serial devices and similar drivers that require the TTY
      layer.  Ideally, these dependencies would occur on a common intermediate
      symbol such as SERIO, but most drivers "select SERIO" rather than
      "depends on SERIO", and "select" does not respect dependencies.
      
      bloat-o-meter output comparing our previous minimal to new minimal by
      removing TTY.  The list is filtered to not show removed entries with awk
      '$3 != "-"' as the list was very long.
      
      add/remove: 0/226 grow/shrink: 2/14 up/down: 6/-35356 (-35350)
      function                                     old     new   delta
      chr_dev_init                                 166     170      +4
      allow_signal                                  80      82      +2
      static.__warned                              143     142      -1
      disallow_signal                               63      62      -1
      __set_special_pids                            95      94      -1
      unregister_console                           126     121      -5
      start_kernel                                 546     541      -5
      register_console                             593     588      -5
      copy_from_user                                45      40      -5
      sys_setsid                                   128     120      -8
      sys_vhangup                                   32      19     -13
      do_exit                                     1543    1526     -17
      bitmap_zero                                   60      40     -20
      arch_local_irq_save                          137     117     -20
      release_task                                 674     652     -22
      static.spin_unlock_irqrestore                308     260     -48
      Signed-off-by: Joe Millenbach US's avatarJoe Millenbach <jmillenbach@gmail.com>
      Reviewed-by: Jamey Sharp's avatarJamey Sharp <jamey@minilop.net>
      Reviewed-by: Josh Triplett's avatarJosh Triplett <josh@joshtriplett.org>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      4f73bc4d
  16. 18 Dec, 2012 1 commit
    • Cyrill Gorcunov's avatar
      fs, epoll: add procfs fdinfo helper · 138d22b5
      Cyrill Gorcunov authored
      This allows us to print out eventpoll target file descriptor, events and
      data, the /proc/pid/fdinfo/fd consists of
      
       | pos:	0
       | flags:	02
       | tfd:        5 events:       1d data: ffffffffffffffff enabled: 1
      
      [avagin@: fix for unitialized ret variable]
      Signed-off-by: default avatarCyrill Gorcunov <gorcunov@openvz.org>
      Acked-by: default avatarPavel Emelyanov <xemul@parallels.com>
      Cc: Oleg Nesterov <oleg@redhat.com>
      Cc: Andrey Vagin <avagin@openvz.org>
      Cc: Al Viro <viro@ZenIV.linux.org.uk>
      Cc: Alexey Dobriyan <adobriyan@gmail.com>
      Cc: James Bottomley <jbottomley@parallels.com>
      Cc: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
      Cc: Alexey Dobriyan <adobriyan@gmail.com>
      Cc: Matthew Helsley <matt.helsley@gmail.com>
      Cc: "J. Bruce Fields" <bfields@fieldses.org>
      Cc: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
      Cc: Tvrtko Ursulin <tvrtko.ursulin@onelan.co.uk>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      138d22b5
  17. 20 Nov, 2012 3 commits
    • Eric W. Biederman's avatar
      proc: Usable inode numbers for the namespace file descriptors. · 98f842e6
      Eric W. Biederman authored
      Assign a unique proc inode to each namespace, and use that
      inode number to ensure we only allocate at most one proc
      inode for every namespace in proc.
      
      A single proc inode per namespace allows userspace to test
      to see if two processes are in the same namespace.
      
      This has been a long requested feature and only blocked because
      a naive implementation would put the id in a global space and
      would ultimately require having a namespace for the names of
      namespaces, making migration and certain virtualization tricks
      impossible.
      
      We still don't have per superblock inode numbers for proc, which
      appears necessary for application unaware checkpoint/restart and
      migrations (if the application is using namespace file descriptors)
      but that is now allowd by the design if it becomes important.
      
      I have preallocated the ipc and uts initial proc inode numbers so
      their structures can be statically initialized.
      Signed-off-by: default avatarEric W. Biederman <ebiederm@xmission.com>
      98f842e6
    • Eric W. Biederman's avatar
      proc: Generalize proc inode allocation · 33d6dce6
      Eric W. Biederman authored
      Generalize the proc inode allocation so that it can be
      used without having to having to create a proc_dir_entry.
      
      This will allow namespace file descriptors to remain light
      weight entitities but still have the same inode number
      when the backing namespace is the same.
      Acked-by: default avatarSerge E. Hallyn <serge.hallyn@ubuntu.com>
      Signed-off-by: default avatarEric W. Biederman <ebiederm@xmission.com>
      33d6dce6
    • Eric W. Biederman's avatar
      userns: Implent proc namespace operations · cde1975b
      Eric W. Biederman authored
      This allows entering a user namespace, and the ability
      to store a reference to a user namespace with a bind
      mount.
      
      Addition of missing userns_ns_put in userns_install
      from Gao feng <gaofeng@cn.fujitsu.com>
      Acked-by: default avatarSerge Hallyn <serge.hallyn@canonical.com>
      Signed-off-by: default avatar"Eric W. Biederman" <ebiederm@xmission.com>
      cde1975b