---
- branch: MAIN
  date: Mon Aug 28 00:46:07 UTC 2017
  files:
  - new: '1.108'
    old: '1.107'
    path: src/bin/ps/ps.1
    pathrev: src/bin/ps/ps.1@1.108
    type: modified
  - new: '1.29'
    old: '1.28'
    path: src/doc/TODO.ptrace
    pathrev: src/doc/TODO.ptrace@1.29
    type: modified
  - new: '1.36'
    old: '1.35'
    path: src/sbin/mount_procfs/mount_procfs.8
    pathrev: src/sbin/mount_procfs/mount_procfs.8@1.36
    type: modified
  - new: '1.109'
    old: '1.108'
    path: src/share/man/man9/kauth.9
    pathrev: src/share/man/man9/kauth.9@1.109
    type: modified
  - new: '1.20'
    old: '1.19'
    path: src/sys/compat/linux/arch/arm/linux_ptrace.c
    pathrev: src/sys/compat/linux/arch/arm/linux_ptrace.c@1.20
    type: modified
  - new: '1.32'
    old: '1.31'
    path: src/sys/compat/linux/arch/i386/linux_ptrace.c
    pathrev: src/sys/compat/linux/arch/i386/linux_ptrace.c@1.32
    type: modified
  - new: '1.30'
    old: '1.29'
    path: src/sys/compat/linux/arch/powerpc/linux_ptrace.c
    pathrev: src/sys/compat/linux/arch/powerpc/linux_ptrace.c@1.30
    type: modified
  - new: '1.269'
    old: '1.268'
    path: src/sys/kern/kern_exit.c
    pathrev: src/sys/kern/kern_exit.c@1.269
    type: modified
  - new: '1.207'
    old: '1.206'
    path: src/sys/kern/kern_proc.c
    pathrev: src/sys/kern/kern_proc.c@1.207
    type: modified
  - new: '1.337'
    old: '1.336'
    path: src/sys/kern/kern_sig.c
    pathrev: src/sys/kern/kern_sig.c@1.337
    type: modified
  - new: '1.23'
    old: '1.22'
    path: src/sys/kern/sys_ptrace_common.c
    pathrev: src/sys/kern/sys_ptrace_common.c@1.23
    type: modified
  - new: '1.12'
    old: '1.11'
    path: src/sys/miscfs/procfs/files.procfs
    pathrev: src/sys/miscfs/procfs/files.procfs@1.12
    type: modified
  - new: '1.72'
    old: '1.71'
    path: src/sys/miscfs/procfs/procfs.h
    pathrev: src/sys/miscfs/procfs/procfs.h@1.72
    type: modified
  - new: '0'
    old: '1.48'
    path: src/sys/miscfs/procfs/procfs_ctl.c
    pathrev: src/sys/miscfs/procfs/procfs_ctl.c@0
    type: deleted
  - new: '1.109'
    old: '1.108'
    path: src/sys/miscfs/procfs/procfs_subr.c
    pathrev: src/sys/miscfs/procfs/procfs_subr.c@1.109
    type: modified
  - new: '1.98'
    old: '1.97'
    path: src/sys/miscfs/procfs/procfs_vfsops.c
    pathrev: src/sys/miscfs/procfs/procfs_vfsops.c@1.98
    type: modified
  - new: '1.198'
    old: '1.197'
    path: src/sys/miscfs/procfs/procfs_vnops.c
    pathrev: src/sys/miscfs/procfs/procfs_vnops.c@1.198
    type: modified
  - new: '1.4'
    old: '1.3'
    path: src/sys/modules/procfs/Makefile
    pathrev: src/sys/modules/procfs/Makefile@1.4
    type: modified
  - new: '1.75'
    old: '1.74'
    path: src/sys/sys/kauth.h
    pathrev: src/sys/sys/kauth.h@1.75
    type: modified
  - new: '1.342'
    old: '1.341'
    path: src/sys/sys/proc.h
    pathrev: src/sys/sys/proc.h@1.342
    type: modified
  - new: '1.224'
    old: '1.223'
    path: src/sys/sys/sysctl.h
    pathrev: src/sys/sys/sysctl.h@1.224
    type: modified
  id: 20170828T004607Z.873dfbc27454421ed76c4d2eecffe36dff1c2383
  log: |
    Remove the filesystem tracing feature

    This is a legacy interface from 4.4BSD, and it was
    introduced to overcome shortcomings of ptrace(2) at that time, which are
    no longer relevant (performance). Today /proc/#/ctl offers a narrow
    subset of ptrace(2) commands and is not applicable for modern
    applications use beyond simplistic tracing scenarios.

    This removal will simplify kernel internals. Users will still be able to
    use all the other /proc files.

    This change won't affect other procfs files neither Linux compat
    features within mount_procfs(8). /proc/#/ctl isn't available on Linux.

    Remove:
     - /proc/#/ctl from mount_procfs(8)
     - P_FSTRACE note from the documentation of ps(1)
     - /proc/#/ctl and filesystem tracing documentation from mount_procfs(8)
     - KAUTH_REQ_PROCESS_PROCFS_CTL documentation from kauth(9)
     - source code file miscfs/procfs/procfs_ctl.c
     - PFSctl and procfs_doctl() from sys/miscfs/procfs/procfs.h
     - KAUTH_REQ_PROCESS_PROCFS_CTL from sys/sys/kauth.h
     - PSL_FSTRACE (0x00010000) from sys/sys/proc.h
     - P_FSTRACE (0x00010000) from sys/sys/sysctl.h

    Reduce code complexity after removal of this functionality.

    Update TODO.ptrace accordingly: remove two entries about /proc tracing.

    Do not keep legacy notes as comments in the headers about removed
    PSL_FSTRACE / P_FSTRACE, as this interface had little number of users
    (close or equal to zero).

    Proposed on tech-kern@.

    All filesystem tracing utility users are encouraged to switch to ptrace(2).

    Sponsored by <The NetBSD Foundation>
  module: src
  subject: 'CVS commit: src'
  unixtime: '1503881167'
  user: kamil