1. 08 Apr, 2015 2 commits
    • Nicholas Bellinger's avatar
      target: Add protected fabric + unprotected device support · 38b57f82
      Nicholas Bellinger authored
      This patch adds a new target_core_fabric_ops callback for allowing fabric
      drivers to expose a TPG attribute for signaling when a T10-PI protected
      fabric wants to function with an un-protected device without T10-PI.
      
      This specifically is to allow LIO to perform WRITE_STRIP + READ_INSERT
      operations when functioning with non T10-PI enabled devices, seperate
      from any available hw offloads the fabric supports.
      
      This is done using a new se_sess->sess_prot_type that is set at fabric
      session creation time based upon the TPG attribute.  It currently cannot
      be changed for individual sessions after initial creation.
      
      Also, update existing target_core_sbc.c code to honor sess_prot_type when
      setting up cmd->prot_op + cmd->prot_type assignments.
      
      (Add unlikely and !! boolean conversion in sbc_check_prot - Sagi)
      
      Cc: Martin Petersen <martin.petersen@oracle.com>
      Cc: Sagi Grimberg <sagig@mellanox.com>
      Cc: Christoph Hellwig <hch@lst.de>
      Cc: Doug Gilbert <dgilbert@interlog.com>
      Signed-off-by: default avatarNicholas Bellinger <nab@linux-iscsi.org>
      38b57f82
    • Nicholas Bellinger's avatar
      target: Convert DIF emulation to use cmd->prot_type · 823ddd87
      Nicholas Bellinger authored
      This patch changes existing DIF emulation to check the command descriptor's
      prot_type, instead of what the backend device is exposing in pi_prot_type.
      
      Since this value is already set in sbc_check_prot(), go ahead and use it to
      allow protected fabrics to function with unprotected devices.
      Reviewed-by: default avatarMartin Petersen <martin.petersen@oracle.com>
      Reviewed-by: default avatarSagi Grimberg <sagig@mellanox.com>
      Cc: Christoph Hellwig <hch@lst.de>
      Signed-off-by: default avatarNicholas Bellinger <nab@linux-iscsi.org>
      823ddd87
  2. 26 Mar, 2015 9 commits
  3. 20 Mar, 2015 2 commits
  4. 07 Mar, 2015 3 commits
  5. 27 Feb, 2015 2 commits
  6. 23 Feb, 2015 3 commits
    • Linus Torvalds's avatar
      Linux 4.0-rc1 · c517d838
      Linus Torvalds authored
      .. after extensive statistical analysis of my G+ polling, I've come to
      the inescapable conclusion that internet polls are bad.
      
      Big surprise.
      
      But "Hurr durr I'ma sheep" trounced "I like online polls" by a 62-to-38%
      margin, in a poll that people weren't even supposed to participate in.
      Who can argue with solid numbers like that? 5,796 votes from people who
      can't even follow the most basic directions?
      
      In contrast, "v4.0" beat out "v3.20" by a slimmer margin of 56-to-44%,
      but with a total of 29,110 votes right now.
      
      Now, arguably, that vote spread is only about 3,200 votes, which is less
      than the almost six thousand votes that the "please ignore" poll got, so
      it could be considered noise.
      
      But hey, I asked, so I'll honor the votes.
      c517d838
    • Linus Torvalds's avatar
      Merge tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4 · feaf2229
      Linus Torvalds authored
      Pull ext4 fixes from Ted Ts'o:
       "Ext4 bug fixes.
      
        We also reserved code points for encryption and read-only images (for
        which the implementation is mostly just the reserved code point for a
        read-only feature :-)"
      
      * tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
        ext4: fix indirect punch hole corruption
        ext4: ignore journal checksum on remount; don't fail
        ext4: remove duplicate remount check for JOURNAL_CHECKSUM change
        ext4: fix mmap data corruption in nodelalloc mode when blocksize < pagesize
        ext4: support read-only images
        ext4: change to use setup_timer() instead of init_timer()
        ext4: reserve codepoints used by the ext4 encryption feature
        jbd2: complain about descriptor block checksum errors
      feaf2229
    • Linus Torvalds's avatar
      Merge branch 'for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs · be5e6616
      Linus Torvalds authored
      Pull more vfs updates from Al Viro:
       "Assorted stuff from this cycle.  The big ones here are multilayer
        overlayfs from Miklos and beginning of sorting ->d_inode accesses out
        from David"
      
      * 'for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (51 commits)
        autofs4 copy_dev_ioctl(): keep the value of ->size we'd used for allocation
        procfs: fix race between symlink removals and traversals
        debugfs: leave freeing a symlink body until inode eviction
        Documentation/filesystems/Locking: ->get_sb() is long gone
        trylock_super(): replacement for grab_super_passive()
        fanotify: Fix up scripted S_ISDIR/S_ISREG/S_ISLNK conversions
        Cachefiles: Fix up scripted S_ISDIR/S_ISREG/S_ISLNK conversions
        VFS: (Scripted) Convert S_ISLNK/DIR/REG(dentry->d_inode) to d_is_*(dentry)
        SELinux: Use d_is_positive() rather than testing dentry->d_inode
        Smack: Use d_is_positive() rather than testing dentry->d_inode
        TOMOYO: Use d_is_dir() rather than d_inode and S_ISDIR()
        Apparmor: Use d_is_positive/negative() rather than testing dentry->d_inode
        Apparmor: mediated_filesystem() should use dentry->d_sb not inode->i_sb
        VFS: Split DCACHE_FILE_TYPE into regular and special types
        VFS: Add a fallthrough flag for marking virtual dentries
        VFS: Add a whiteout dentry type
        VFS: Introduce inode-getting helpers for layered/unioned fs environments
        Infiniband: Fix potential NULL d_inode dereference
        posix_acl: fix reference leaks in posix_acl_create
        autofs4: Wrong format for printing dentry
        ...
      be5e6616
  7. 22 Feb, 2015 19 commits
    • Linus Torvalds's avatar
      Merge branch 'fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm · 90c453ca
      Linus Torvalds authored
      Pull ARM fix from Russell King:
       "Just one fix this time around.  __iommu_alloc_buffer() can cause a
        BUG() if dma_alloc_coherent() is called with either __GFP_DMA32 or
        __GFP_HIGHMEM set.  The patch from Alexandre addresses this"
      
      * 'fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm:
        ARM: 8305/1: DMA: Fix kzalloc flags in __iommu_alloc_buffer()
      90c453ca
    • Al Viro's avatar
      autofs4 copy_dev_ioctl(): keep the value of ->size we'd used for allocation · 0a280962
      Al Viro authored
      X-Coverup: just ask spender
      Cc: stable@vger.kernel.org
      Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
      0a280962
    • Al Viro's avatar
      procfs: fix race between symlink removals and traversals · 7e0e953b
      Al Viro authored
      use_pde()/unuse_pde() in ->follow_link()/->put_link() resp.
      
      Cc: stable@vger.kernel.org
      Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
      7e0e953b
    • Al Viro's avatar
      debugfs: leave freeing a symlink body until inode eviction · 0db59e59
      Al Viro authored
      As it is, we have debugfs_remove() racing with symlink traversals.
      Supply ->evict_inode() and do freeing there - inode will remain
      pinned until we are done with the symlink body.
      
      And rip the idiocy with checking if dentry is positive right after
      we'd verified debugfs_positive(), which is a stronger check...
      
      Cc: stable@vger.kernel.org
      Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
      0db59e59
    • Al Viro's avatar
      dca11178
    • Konstantin Khlebnikov's avatar
      trylock_super(): replacement for grab_super_passive() · eb6ef3df
      Konstantin Khlebnikov authored
      I've noticed significant locking contention in memory reclaimer around
      sb_lock inside grab_super_passive(). Grab_super_passive() is called from
      two places: in icache/dcache shrinkers (function super_cache_scan) and
      from writeback (function __writeback_inodes_wb). Both are required for
      progress in memory allocator.
      
      Grab_super_passive() acquires sb_lock to increment sb->s_count and check
      sb->s_instances. It seems sb->s_umount locked for read is enough here:
      super-block deactivation always runs under sb->s_umount locked for write.
      Protecting super-block itself isn't a problem: in super_cache_scan() sb
      is protected by shrinker_rwsem: it cannot be freed if its slab shrinkers
      are still active. Inside writeback super-block comes from inode from bdi
      writeback list under wb->list_lock.
      
      This patch removes locking sb_lock and checks s_instances under s_umount:
      generic_shutdown_super() unlinks it under sb->s_umount locked for write.
      New variant is called trylock_super() and since it only locks semaphore,
      callers must call up_read(&sb->s_umount) instead of drop_super(sb) when
      they're done.
      Signed-off-by: default avatarKonstantin Khlebnikov <khlebnikov@yandex-team.ru>
      Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
      eb6ef3df
    • David Howells's avatar
      fanotify: Fix up scripted S_ISDIR/S_ISREG/S_ISLNK conversions · 54f2a2f4
      David Howells authored
      Fanotify probably doesn't want to watch autodirs so make it use d_can_lookup()
      rather than d_is_dir() when checking a dir watch and give an error on fake
      directories.
      Signed-off-by: default avatarDavid Howells <dhowells@redhat.com>
      Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
      54f2a2f4
    • David Howells's avatar
      Cachefiles: Fix up scripted S_ISDIR/S_ISREG/S_ISLNK conversions · ce40fa78
      David Howells authored
      Fix up the following scripted S_ISDIR/S_ISREG/S_ISLNK conversions (or lack
      thereof) in cachefiles:
      
       (1) Cachefiles mostly wants to use d_can_lookup() rather than d_is_dir() as
           it doesn't want to deal with automounts in its cache.
      
       (2) Coccinelle didn't find S_IS* expressions in ASSERT() statements in
           cachefiles.
      Signed-off-by: default avatarDavid Howells <dhowells@redhat.com>
      Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
      ce40fa78
    • 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
    • David Howells's avatar
      SELinux: Use d_is_positive() rather than testing dentry->d_inode · 2c616d4d
      David Howells authored
      Use d_is_positive() rather than testing dentry->d_inode in SELinux to get rid
      of direct references to d_inode outside of the VFS.
      Signed-off-by: default avatarDavid Howells <dhowells@redhat.com>
      Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
      2c616d4d
    • David Howells's avatar
      Smack: Use d_is_positive() rather than testing dentry->d_inode · 8802565b
      David Howells authored
      Use d_is_positive() rather than testing dentry->d_inode in Smack to get rid of
      direct references to d_inode outside of the VFS.
      Signed-off-by: default avatarDavid Howells <dhowells@redhat.com>
      Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
      8802565b
    • David Howells's avatar
      TOMOYO: Use d_is_dir() rather than d_inode and S_ISDIR() · e656a8eb
      David Howells authored
      Use d_is_dir() rather than d_inode and S_ISDIR().  Note that this will include
      fake directories such as automount triggers.
      Signed-off-by: default avatarDavid Howells <dhowells@redhat.com>
      Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
      e656a8eb
    • David Howells's avatar
      Apparmor: Use d_is_positive/negative() rather than testing dentry->d_inode · 729b8a3d
      David Howells authored
      Use d_is_positive(dentry) or d_is_negative(dentry) rather than testing
      dentry->d_inode as the dentry may cover another layer that has an inode when
      the top layer doesn't or may hold a 0,0 chardev that's actually a whiteout.
      Signed-off-by: default avatarDavid Howells <dhowells@redhat.com>
      Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
      729b8a3d
    • David Howells's avatar
      Apparmor: mediated_filesystem() should use dentry->d_sb not inode->i_sb · 7ac2856d
      David Howells authored
      mediated_filesystem() should use dentry->d_sb not dentry->d_inode->i_sb and
      should avoid file_inode() also since it is really dealing with the path.
      Signed-off-by: default avatarDavid Howells <dhowells@redhat.com>
      Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
      7ac2856d
    • David Howells's avatar
      VFS: Split DCACHE_FILE_TYPE into regular and special types · 44bdb5e5
      David Howells authored
      Split DCACHE_FILE_TYPE into DCACHE_REGULAR_TYPE (dentries representing regular
      files) and DCACHE_SPECIAL_TYPE (representing blockdev, chardev, FIFO and
      socket files).
      
      d_is_reg() and d_is_special() are added to detect these subtypes and
      d_is_file() is left as the union of the two.
      
      This allows a number of places that use S_ISREG(dentry->d_inode->i_mode) to
      use d_is_reg(dentry) instead.
      Signed-off-by: default avatarDavid Howells <dhowells@redhat.com>
      Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
      44bdb5e5
    • David Howells's avatar
      VFS: Add a fallthrough flag for marking virtual dentries · df1a085a
      David Howells authored
      Add a DCACHE_FALLTHRU flag to indicate that, in a layered filesystem, this is
      a virtual dentry that covers another one in a lower layer that should be used
      instead.  This may be recorded on medium if directory integration is stored
      there.
      
      The flag can be set with d_set_fallthru() and tested with d_is_fallthru().
      
      Original-author: Valerie Aurora <vaurora@redhat.com>
      Signed-off-by: default avatarDavid Howells <dhowells@redhat.com>
      Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
      df1a085a
    • David Howells's avatar
      VFS: Add a whiteout dentry type · e7f7d225
      David Howells authored
      Add DCACHE_WHITEOUT_TYPE and provide a d_is_whiteout() accessor function.  A
      d_is_miss() accessor is also added for ordinary cache misses and
      d_is_negative() is modified to indicate either an ordinary miss or an enforced
      miss (whiteout).
      Signed-off-by: default avatarDavid Howells <dhowells@redhat.com>
      Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
      e7f7d225
    • David Howells's avatar
      VFS: Introduce inode-getting helpers for layered/unioned fs environments · 155e35d4
      David Howells authored
      Introduce some function for getting the inode (and also the dentry) in an
      environment where layered/unioned filesystems are in operation.
      
      The problem is that we have places where we need *both* the union dentry and
      the lower source or workspace inode or dentry available, but we can only have
      a handle on one of them.  Therefore we need to derive the handle to the other
      from that.
      
      The idea is to introduce an extra field in struct dentry that allows the union
      dentry to refer to and pin the lower dentry.
      Signed-off-by: default avatarDavid Howells <dhowells@redhat.com>
      Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
      155e35d4
    • Linus Torvalds's avatar
      Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus · a135c717
      Linus Torvalds authored
      Pull MIPS updates from Ralf Baechle:
       "This is the main pull request for MIPS:
      
         - a number of fixes that didn't make the 3.19 release.
      
         - a number of cleanups.
      
         - preliminary support for Cavium's Octeon 3 SOCs which feature up to
           48 MIPS64 R3 cores with FPU and hardware virtualization.
      
         - support for MIPS R6 processors.
      
           Revision 6 of the MIPS architecture is a major revision of the MIPS
           architecture which does away with many of original sins of the
           architecture such as branch delay slots.  This and other changes in
           R6 require major changes throughout the entire MIPS core
           architecture code and make up for the lion share of this pull
           request.
      
         - finally some preparatory work for eXtendend Physical Address
           support, which allows support of up to 40 bit of physical address
           space on 32 bit processors"
      
           [ Ahh, MIPS can't leave the PAE brain damage alone.  It's like
             every CPU architect has to make that mistake, but pee in the snow
             by changing the TLA.  But whether it's called PAE, LPAE or XPA,
             it's horrid crud   - Linus ]
      
      * 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus: (114 commits)
        MIPS: sead3: Corrected get_c0_perfcount_int
        MIPS: mm: Remove dead macro definitions
        MIPS: OCTEON: irq: add CIB and other fixes
        MIPS: OCTEON: Don't do acknowledge operations for level triggered irqs.
        MIPS: OCTEON: More OCTEONIII support
        MIPS: OCTEON: Remove setting of processor specific CVMCTL icache bits.
        MIPS: OCTEON: Core-15169 Workaround and general CVMSEG cleanup.
        MIPS: OCTEON: Update octeon-model.h code for new SoCs.
        MIPS: OCTEON: Implement DCache errata workaround for all CN6XXX
        MIPS: OCTEON: Add little-endian support to asm/octeon/octeon.h
        MIPS: OCTEON: Implement the core-16057 workaround
        MIPS: OCTEON: Delete unused COP2 saving code
        MIPS: OCTEON: Use correct instruction to read 64-bit COP0 register
        MIPS: OCTEON: Save and restore CP2 SHA3 state
        MIPS: OCTEON: Fix FP context save.
        MIPS: OCTEON: Save/Restore wider multiply registers in OCTEON III CPUs
        MIPS: boot: Provide more uImage options
        MIPS: Remove unneeded #ifdef __KERNEL__ from asm/processor.h
        MIPS: ip22-gio: Remove legacy suspend/resume support
        mips: pci: Add ifdef around pci_proc_domain
        ...
      a135c717