1. 21 Jul, 2018 9 commits
    • Eric W. Biederman's avatar
      signal: Pass pid and pid type into send_sigqueue · 24122c7f
      Eric W. Biederman authored
      Make the code more maintainable by performing more of the signal
      related work in send_sigqueue.
      
      A quick inspection of do_timer_create will show that this code path
      does not lookup a thread group by a thread's pid.  Making it safe
      to find the task pointed to by it_pid with "pid_task(it_pid, type)";
      
      This supports the changes needed in fork to tell if a signal was sent
      to a single process or a group of processes.
      
      Having the pid to task transition in signal.c will also make it easier
      to sort out races with de_thread and and the thread group leader
      exiting when it comes time to address that.
      Signed-off-by: default avatar"Eric W. Biederman" <ebiederm@xmission.com>
      24122c7f
    • Eric W. Biederman's avatar
      posix-timers: Noralize good_sigevent · 2118e1f5
      Eric W. Biederman authored
      In good_sigevent directly compute the default return value as
      "task_tgid(current)".  This is exactly the same as
      "task_pid(current->group_leader)" but written more clearly.
      
      In the thread case first compute the thread's pid.  Then veify that
      attached to that pid is a thread of the current thread group.
      
      This has the net effect of making the code a little clearer, and
      making it obvious that posix timers never look up a process by a the
      pid of a thread.
      Signed-off-by: default avatar"Eric W. Biederman" <ebiederm@xmission.com>
      2118e1f5
    • Eric W. Biederman's avatar
      signal: Use PIDTYPE_TGID to clearly store where file signals will be sent · 01919134
      Eric W. Biederman authored
      When f_setown is called a pid and a pid type are stored.  Replace the use
      of PIDTYPE_PID with PIDTYPE_TGID as PIDTYPE_TGID goes to the entire thread
      group.  Replace the use of PIDTYPE_MAX with PIDTYPE_PID as PIDTYPE_PID now
      is only for a thread.
      
      Update the users of __f_setown to use PIDTYPE_TGID instead of
      PIDTYPE_PID.
      
      For now the code continues to capture task_pid (when task_tgid would
      really be appropriate), and iterate on PIDTYPE_PID (even when type ==
      PIDTYPE_TGID) out of an abundance of caution to preserve existing
      behavior.
      
      Oleg Nesterov suggested using the test to ensure we use PIDTYPE_PID
      for tgid lookup also be used to avoid taking the tasklist lock.
      Suggested-by: default avatarOleg Nesterov <oleg@redhat.com>
      Signed-off-by: default avatar"Eric W. Biederman" <ebiederm@xmission.com>
      01919134
    • Eric W. Biederman's avatar
      pid: Implement PIDTYPE_TGID · 6883f81a
      Eric W. Biederman authored
      Everywhere except in the pid array we distinguish between a tasks pid and
      a tasks tgid (thread group id).  Even in the enumeration we want that
      distinction sometimes so we have added __PIDTYPE_TGID.  With leader_pid
      we almost have an implementation of PIDTYPE_TGID in struct signal_struct.
      
      Add PIDTYPE_TGID as a first class member of the pid_type enumeration and
      into the pids array.  Then remove the __PIDTYPE_TGID special case and the
      leader_pid in signal_struct.
      
      The net size increase is just an extra pointer added to struct pid and
      an extra pair of pointers of an hlist_node added to task_struct.
      
      The effect on code maintenance is the removal of a number of special
      cases today and the potential to remove many more special cases as
      PIDTYPE_TGID gets used to it's fullest.  The long term potential
      is allowing zombie thread group leaders to exit, which will remove
      a lot more special cases in the code.
      Signed-off-by: default avatar"Eric W. Biederman" <ebiederm@xmission.com>
      6883f81a
    • Eric W. Biederman's avatar
      pids: Move the pgrp and session pid pointers from task_struct to signal_struct · 2c470475
      Eric W. Biederman authored
      To access these fields the code always has to go to group leader so
      going to signal struct is no loss and is actually a fundamental simplification.
      
      This saves a little bit of memory by only allocating the pid pointer array
      once instead of once for every thread, and even better this removes a
      few potential races caused by the fact that group_leader can be changed
      by de_thread, while signal_struct can not.
      Signed-off-by: default avatar"Eric W. Biederman" <ebiederm@xmission.com>
      2c470475
    • Eric W. Biederman's avatar
    • Eric W. Biederman's avatar
      pids: Compute task_tgid using signal->leader_pid · 7a36094d
      Eric W. Biederman authored
      The cost is the the same and this removes the need
      to worry about complications that come from de_thread
      and group_leader changing.
      
      __task_pid_nr_ns has been updated to take advantage of this change.
      Signed-off-by: default avatar"Eric W. Biederman" <ebiederm@xmission.com>
      7a36094d
    • Eric W. Biederman's avatar
      pids: Move task_pid_type into sched/signal.h · 1fb53567
      Eric W. Biederman authored
      The function is general and inline so there is no need
      to hide it inside of exit.c
      Signed-off-by: default avatar"Eric W. Biederman" <ebiederm@xmission.com>
      1fb53567
    • Eric W. Biederman's avatar
      pids: Initialize leader_pid in init_task · 2896b0f0
      Eric W. Biederman authored
      This is cheap and no cost so we might as well.
      Signed-off-by: default avatar"Eric W. Biederman" <ebiederm@xmission.com>
      2896b0f0
  2. 16 Jun, 2018 8 commits
    • Linus Torvalds's avatar
      Linux 4.18-rc1 · ce397d21
      Linus Torvalds authored
      ce397d21
    • Linus Torvalds's avatar
      Merge tag 'for-linus-20180616' of git://git.kernel.dk/linux-block · 265c5596
      Linus Torvalds authored
      Pull block fixes from Jens Axboe:
       "A collection of fixes that should go into -rc1. This contains:
      
         - bsg_open vs bsg_unregister race fix (Anatoliy)
      
         - NVMe pull request from Christoph, with fixes for regressions in
           this window, FC connect/reconnect path code unification, and a
           trace point addition.
      
         - timeout fix (Christoph)
      
         - remove a few unused functions (Christoph)
      
         - blk-mq tag_set reinit fix (Roman)"
      
      * tag 'for-linus-20180616' of git://git.kernel.dk/linux-block:
        bsg: fix race of bsg_open and bsg_unregister
        block: remov blk_queue_invalidate_tags
        nvme-fabrics: fix and refine state checks in __nvmf_check_ready
        nvme-fabrics: handle the admin-only case properly in nvmf_check_ready
        nvme-fabrics: refactor queue ready check
        blk-mq: remove blk_mq_tagset_iter
        nvme: remove nvme_reinit_tagset
        nvme-fc: fix nulling of queue data on reconnect
        nvme-fc: remove reinit_request routine
        blk-mq: don't time out requests again that are in the timeout handler
        nvme-fc: change controllers first connect to use reconnect path
        nvme: don't rely on the changed namespace list log
        nvmet: free smart-log buffer after use
        nvme-rdma: fix error flow during mapping request data
        nvme: add bio remapping tracepoint
        nvme: fix NULL pointer dereference in nvme_init_subsystem
        blk-mq: reinit q->tag_set_list entry only after grace period
      265c5596
    • Linus Torvalds's avatar
      Merge tag 'docs-broken-links' of git://linuxtv.org/mchehab/experimental · 5e7b9212
      Linus Torvalds authored
      Pull documentation fixes from Mauro Carvalho Chehab:
       "This solves a series of broken links for files under Documentation,
        and improves a script meant to detect such broken links (see
        scripts/documentation-file-ref-check).
      
        The changes on this series are:
      
         - can.rst: fix a footnote reference;
      
         - crypto_engine.rst: Fix two parsing warnings;
      
         - Fix a lot of broken references to Documentation/*;
      
         - improve the scripts/documentation-file-ref-check script, in order
           to help detecting/fixing broken references, preventing
           false-positives.
      
        After this patch series, only 33 broken references to doc files are
        detected by scripts/documentation-file-ref-check"
      
      * tag 'docs-broken-links' of git://linuxtv.org/mchehab/experimental: (26 commits)
        fix a series of Documentation/ broken file name references
        Documentation: rstFlatTable.py: fix a broken reference
        ABI: sysfs-devices-system-cpu: remove a broken reference
        devicetree: fix a series of wrong file references
        devicetree: fix name of pinctrl-bindings.txt
        devicetree: fix some bindings file names
        MAINTAINERS: fix location of DT npcm files
        MAINTAINERS: fix location of some display DT bindings
        kernel-parameters.txt: fix pointers to sound parameters
        bindings: nvmem/zii: Fix location of nvmem.txt
        docs: Fix more broken references
        scripts/documentation-file-ref-check: check tools/*/Documentation
        scripts/documentation-file-ref-check: get rid of false-positives
        scripts/documentation-file-ref-check: hint: dash or underline
        scripts/documentation-file-ref-check: add a fix logic for DT
        scripts/documentation-file-ref-check: accept more wildcards at filenames
        scripts/documentation-file-ref-check: fix help message
        media: max2175: fix location of driver's companion documentation
        media: v4l: fix broken video4linux docs locations
        media: dvb: point to the location of the old README.dvb-usb file
        ...
      5e7b9212
    • Linus Torvalds's avatar
      Merge tag 'fsnotify_for_v4.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs · dbb2816f
      Linus Torvalds authored
      Pull fsnotify updates from Jan Kara:
       "fsnotify cleanups unifying handling of different watch types.
      
        This is the shortened fsnotify series from Amir with the last five
        patches pulled out. Amir has modified those patches to not change
        struct inode but obviously it's too late for those to go into this
        merge window"
      
      * tag 'fsnotify_for_v4.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs:
        fsnotify: add fsnotify_add_inode_mark() wrappers
        fanotify: generalize fanotify_should_send_event()
        fsnotify: generalize send_to_group()
        fsnotify: generalize iteration of marks by object type
        fsnotify: introduce marks iteration helpers
        fsnotify: remove redundant arguments to handle_event()
        fsnotify: use type id to identify connector object type
      dbb2816f
    • Linus Torvalds's avatar
      Merge tag 'fbdev-v4.18' of git://github.com/bzolnier/linux · 644f2639
      Linus Torvalds authored
      Pull fbdev updates from Bartlomiej Zolnierkiewicz:
       "There is nothing really major here, few small fixes, some cleanups and
        dead drivers removal:
      
         - mark omapfb drivers as orphans in MAINTAINERS file (Tomi Valkeinen)
      
         - add missing module license tags to omap/omapfb driver (Arnd
           Bergmann)
      
         - add missing GPIOLIB dependendy to omap2/omapfb driver (Arnd
           Bergmann)
      
         - convert savagefb, aty128fb & radeonfb drivers to use msleep & co.
           (Jia-Ju Bai)
      
         - allow COMPILE_TEST build for viafb driver (media part was reviewed
           by media subsystem Maintainer)
      
         - remove unused MERAM support from sh_mobile_lcdcfb and shmob-drm
           drivers (drm parts were acked by shmob-drm driver Maintainer)
      
         - remove unused auo_k190xfb drivers
      
         - misc cleanups (Souptick Joarder, Wolfram Sang, Markus Elfring, Andy
           Shevchenko, Colin Ian King)"
      
      * tag 'fbdev-v4.18' of git://github.com/bzolnier/linux: (26 commits)
        fb_omap2: add gpiolib dependency
        video/omap: add module license tags
        MAINTAINERS: make omapfb orphan
        video: fbdev: pxafb: match_string() conversion fixup
        video: fbdev: nvidia: fix spelling mistake: "scaleing" -> "scaling"
        video: fbdev: fix spelling mistake: "frambuffer" -> "framebuffer"
        video: fbdev: pxafb: Convert to use match_string() helper
        video: fbdev: via: allow COMPILE_TEST build
        video: fbdev: remove unused sh_mobile_meram driver
        drm: shmobile: remove unused MERAM support
        video: fbdev: sh_mobile_lcdcfb: remove unused MERAM support
        video: fbdev: remove unused auo_k190xfb drivers
        video: omap: Improve a size determination in omapfb_do_probe()
        video: sm501fb: Improve a size determination in sm501fb_probe()
        video: fbdev-MMP: Improve a size determination in path_init()
        video: fbdev-MMP: Delete an error message for a failed memory allocation in two functions
        video: auo_k190x: Delete an error message for a failed memory allocation in auok190x_common_probe()
        video: sh_mobile_lcdcfb: Delete an error message for a failed memory allocation in two functions
        video: sh_mobile_meram: Delete an error message for a failed memory allocation in sh_mobile_meram_probe()
        video: fbdev: sh_mobile_meram: Drop SUPERH platform dependency
        ...
      644f2639
    • Linus Torvalds's avatar
      Merge branch 'afs-proc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs · 35773c93
      Linus Torvalds authored
      Pull AFS updates from Al Viro:
       "Assorted AFS stuff - ended up in vfs.git since most of that consists
        of David's AFS-related followups to Christoph's procfs series"
      
      * 'afs-proc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
        afs: Optimise callback breaking by not repeating volume lookup
        afs: Display manually added cells in dynamic root mount
        afs: Enable IPv6 DNS lookups
        afs: Show all of a server's addresses in /proc/fs/afs/servers
        afs: Handle CONFIG_PROC_FS=n
        proc: Make inline name size calculation automatic
        afs: Implement network namespacing
        afs: Mark afs_net::ws_cell as __rcu and set using rcu functions
        afs: Fix a Sparse warning in xdr_decode_AFSFetchStatus()
        proc: Add a way to make network proc files writable
        afs: Rearrange fs/afs/proc.c to remove remaining predeclarations.
        afs: Rearrange fs/afs/proc.c to move the show routines up
        afs: Rearrange fs/afs/proc.c by moving fops and open functions down
        afs: Move /proc management functions to the end of the file
      35773c93
    • Linus Torvalds's avatar
      Merge branch 'work.compat' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs · 29d6849d
      Linus Torvalds authored
      Pull compat updates from Al Viro:
       "Some biarch patches - getting rid of assorted (mis)uses of
        compat_alloc_user_space().
      
        Not much in that area this cycle..."
      
      * 'work.compat' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
        orangefs: simplify compat ioctl handling
        signalfd: lift sigmask copyin and size checks to callers of do_signalfd4()
        vmsplice(): lift importing iovec into vmsplice(2) and compat counterpart
      29d6849d
    • Linus Torvalds's avatar
      Merge branch 'work.aio' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs · a5b729ea
      Linus Torvalds authored
      Pull aio fixes from Al Viro:
       "Assorted AIO followups and fixes"
      
      * 'work.aio' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
        eventpoll: switch to ->poll_mask
        aio: only return events requested in poll_mask() for IOCB_CMD_POLL
        eventfd: only return events requested in poll_mask()
        aio: mark __aio_sigset::sigmask const
      a5b729ea
  3. 15 Jun, 2018 23 commits