1. 22 Sep, 2016 1 commit
  2. 03 Aug, 2016 2 commits
  3. 05 Jul, 2016 1 commit
  4. 29 May, 2016 1 commit
  5. 10 Apr, 2016 1 commit
  6. 09 Jan, 2016 1 commit
  7. 08 Jan, 2016 1 commit
  8. 30 Dec, 2015 1 commit
  9. 09 Dec, 2015 1 commit
    • Al Viro's avatar
      replace ->follow_link() with new method that could stay in RCU mode · 6b255391
      Al Viro authored
      new method: ->get_link(); replacement of ->follow_link().  The differences
      are:
      	* inode and dentry are passed separately
      	* might be called both in RCU and non-RCU mode;
      the former is indicated by passing it a NULL dentry.
      	* when called that way it isn't allowed to block
      and should return ERR_PTR(-ECHILD) if it needs to be called
      in non-RCU mode.
      
      It's a flagday change - the old method is gone, all in-tree instances
      converted.  Conversion isn't hard; said that, so far very few instances
      do not immediately bail out when called in RCU mode.  That'll change
      in the next commits.
      Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
      6b255391
  10. 08 Dec, 2015 1 commit
    • Al Viro's avatar
      9p: ->evict_inode() should kick out ->i_data, not ->i_mapping · 4ad78628
      Al Viro authored
      For block devices the pagecache is associated with the inode
      on bdevfs, not with the aliasing ones on the mountable filesystems.
      The latter have its own ->i_data empty and ->i_mapping pointing
      to the (unique per major/minor) bdevfs inode.  That guarantees
      cache coherence between all block device inodes with the same
      device number.
      
      Eviction of an alias inode has no business trying to evict the
      pages belonging to bdevfs one; moreover, ->i_mapping is only
      safe to access when the thing is opened.  At the time of
      ->evict_inode() the victim is definitely *not* opened.  We are
      about to kill the address space embedded into struct inode
      (inode->i_data) and that's what we need to empty of any pages.
      
      9p instance tries to empty inode->i_mapping instead, which is
      both unsafe and bogus - if we have several device nodes with
      the same device number in different places, closing one of them
      should not try to empty the (shared) page cache.
      
      Fortunately, other instances in the tree are OK; they are
      evicting from &inode->i_data instead, as 9p one should.
      
      Cc: stable@vger.kernel.org # v2.6.32+, ones prior to 2.6.36 need only half of that
      Reported-by: default avatar"Suzuki K. Poulose" <Suzuki.Poulose@arm.com>
      Tested-by: default avatar"Suzuki K. Poulose" <Suzuki.Poulose@arm.com>
      Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
      4ad78628
  11. 09 Nov, 2015 1 commit
  12. 12 Jul, 2015 1 commit
  13. 15 May, 2015 1 commit
  14. 11 May, 2015 4 commits
  15. 15 Apr, 2015 1 commit
  16. 22 Feb, 2015 1 commit
    • David Howells's avatar
      VFS: (Scripted) Convert S_ISLNK/DIR/REG(dentry->d_inode) to d_is_*(dentry) · e36cb0b8
      David Howells authored
      Convert the following where appropriate:
      
       (1) S_ISLNK(dentry->d_inode) to d_is_symlink(dentry).
      
       (2) S_ISREG(dentry->d_inode) to d_is_reg(dentry).
      
       (3) S_ISDIR(dentry->d_inode) to d_is_dir(dentry).  This is actually more
           complicated than it appears as some calls should be converted to
           d_can_lookup() instead.  The difference is whether the directory in
           question is a real dir with a ->lookup op or whether it's a fake dir with
           a ->d_automount op.
      
      In some circumstances, we can subsume checks for dentry->d_inode not being
      NULL into this, provided we the code isn't in a filesystem that expects
      d_inode to be NULL if the dirent really *is* negative (ie. if we're going to
      use d_inode() rather than d_backing_inode() to get the inode pointer).
      
      Note that the dentry type field may be set to something other than
      DCACHE_MISS_TYPE when d_inode is NULL in the case of unionmount, where the VFS
      manages the fall-through from a negative dentry to a lower layer.  In such a
      case, the dentry type of the negative union dentry is set to the same as the
      type of the lower dentry.
      
      However, if you know d_inode is not NULL at the call site, then you can use
      the d_is_xxx() functions even in a filesystem.
      
      There is one further complication: a 0,0 chardev dentry may be labelled
      DCACHE_WHITEOUT_TYPE rather than DCACHE_SPECIAL_TYPE.  Strictly, this was
      intended for special directory entry types that don't have attached inodes.
      
      The following perl+coccinelle script was used:
      
      use strict;
      
      my @callers;
      open($fd, 'git grep -l \'S_IS[A-Z].*->d_inode\' |') ||
          die "Can't grep for S_ISDIR and co. callers";
      @callers = <$fd>;
      close($fd);
      unless (@callers) {
          print "No matches\n";
          exit(0);
      }
      
      my @cocci = (
          '@@',
          'expression E;',
          '@@',
          '',
          '- S_ISLNK(E->d_inode->i_mode)',
          '+ d_is_symlink(E)',
          '',
          '@@',
          'expression E;',
          '@@',
          '',
          '- S_ISDIR(E->d_inode->i_mode)',
          '+ d_is_dir(E)',
          '',
          '@@',
          'expression E;',
          '@@',
          '',
          '- S_ISREG(E->d_inode->i_mode)',
          '+ d_is_reg(E)' );
      
      my $coccifile = "tmp.sp.cocci";
      open($fd, ">$coccifile") || die $coccifile;
      print($fd "$_\n") || die $coccifile foreach (@cocci);
      close($fd);
      
      foreach my $file (@callers) {
          chomp $file;
          print "Processing ", $file, "\n";
          system("spatch", "--sp-file", $coccifile, $file, "--in-place", "--no-show-diff") == 0 ||
      	die "spatch failed";
      }
      
      [AV: overlayfs parts skipped]
      Signed-off-by: default avatarDavid Howells <dhowells@redhat.com>
      Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
      e36cb0b8
  17. 19 Nov, 2014 1 commit
  18. 09 Oct, 2014 1 commit
  19. 04 Jun, 2014 1 commit
  20. 01 Jun, 2014 1 commit
  21. 03 Apr, 2014 1 commit
    • Johannes Weiner's avatar
      mm + fs: store shadow entries in page cache · 91b0abe3
      Johannes Weiner authored
      Reclaim will be leaving shadow entries in the page cache radix tree upon
      evicting the real page.  As those pages are found from the LRU, an
      iput() can lead to the inode being freed concurrently.  At this point,
      reclaim must no longer install shadow pages because the inode freeing
      code needs to ensure the page tree is really empty.
      
      Add an address_space flag, AS_EXITING, that the inode freeing code sets
      under the tree lock before doing the final truncate.  Reclaim will check
      for this flag before installing shadow pages.
      Signed-off-by: default avatarJohannes Weiner <hannes@cmpxchg.org>
      Reviewed-by: default avatarRik van Riel <riel@redhat.com>
      Reviewed-by: default avatarMinchan Kim <minchan@kernel.org>
      Cc: Andrea Arcangeli <aarcange@redhat.com>
      Cc: Bob Liu <bob.liu@oracle.com>
      Cc: Christoph Hellwig <hch@infradead.org>
      Cc: Dave Chinner <david@fromorbit.com>
      Cc: Greg Thelen <gthelen@google.com>
      Cc: Hugh Dickins <hughd@google.com>
      Cc: Jan Kara <jack@suse.cz>
      Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
      Cc: Luigi Semenzato <semenzato@google.com>
      Cc: Mel Gorman <mgorman@suse.de>
      Cc: Metin Doslu <metin@citusdata.com>
      Cc: Michel Lespinasse <walken@google.com>
      Cc: Ozgun Erdogan <ozgun@citusdata.com>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Roman Gushchin <klamm@yandex-team.ru>
      Cc: Ryan Mallon <rmallon@gmail.com>
      Cc: Tejun Heo <tj@kernel.org>
      Cc: Vlastimil Babka <vbabka@suse.cz>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      91b0abe3
  22. 10 Jan, 2014 1 commit
  23. 23 Nov, 2013 2 commits
  24. 25 Oct, 2013 1 commit
  25. 30 Jul, 2013 1 commit
  26. 08 Jul, 2013 1 commit
  27. 28 Feb, 2013 4 commits
  28. 12 Feb, 2013 1 commit
    • Eric W. Biederman's avatar
      9p: Modify the stat structures to use kuid_t and kgid_t · 447c5094
      Eric W. Biederman authored
      9p has thre strucrtures that can encode inode stat information.  Modify
      all of those structures to contain kuid_t and kgid_t values.  Modify
      he wire encoders and decoders of those structures to use 'u' and 'g' instead of
      'd' in the format string where uids and gids are present.
      
      This results in all kuid and kgid conversion to and from on the wire values
      being performed by the same code in protocol.c where the client is known
      at the time of the conversion.
      
      Cc: Eric Van Hensbergen <ericvh@gmail.com>
      Cc: Ron Minnich <rminnich@gmail.com>
      Cc: Latchesar Ionkov <lucho@ionkov.net>
      Signed-off-by: default avatarEric W. Biederman <ebiederm@xmission.com>
      447c5094
  29. 10 Feb, 2013 1 commit
  30. 06 Sep, 2012 1 commit
  31. 14 Jul, 2012 2 commits