1. 20 11月, 2011 3 次提交
    • J
      btrfs: mirror_num should be int, not u64 · 32240a91
      Jan Schmidt 提交于
      My previous patch introduced some u64 for failed_mirror variables, this one
      makes it consistent again.
      Signed-off-by: NJan Schmidt <list.btrfs@jan-o-sch.net>
      Signed-off-by: NChris Mason <chris.mason@oracle.com>
      32240a91
    • J
      btrfs: Fix up 32/64-bit compatibility for new ioctls · 745c4d8e
      Jeff Mahoney 提交于
       This patch casts to unsigned long before casting to a pointer and fixes
       the following warnings:
      fs/btrfs/extent_io.c:2289:20: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
      fs/btrfs/ioctl.c:2933:37: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
      fs/btrfs/ioctl.c:2937:21: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
      fs/btrfs/ioctl.c:3020:21: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
      fs/btrfs/scrub.c:275:4: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
      fs/btrfs/backref.c:686:27: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
      Signed-off-by: NJeff Mahoney <jeffm@suse.com>
      Signed-off-by: NChris Mason <chris.mason@oracle.com>
      745c4d8e
    • C
      Btrfs: fix barrier flushes · 387125fc
      Chris Mason 提交于
      When btrfs is writing the super blocks, it send barrier flushes to make
      sure writeback caching drives get all the metadata on disk in the
      right order.
      
      But, we have two bugs in the way these are sent down.  When doing
      full commits (not via the tree log), we are sending the barrier down
      before the last super when it should be going down before the first.
      
      In multi-device setups, we should be waiting for the barriers to
      complete on all devices before writing any of the supers.
      
      Both of these bugs can cause corruptions on power failures.  We fix it
      with some new code to send down empty barriers to all devices before
      writing the first super.
      
      Alexandre Oliva found the multi-device bug.  Arne Jansen did the async
      barrier loop.
      Signed-off-by: NChris Mason <chris.mason@oracle.com>
      Reported-by: NAlexandre Oliva <oliva@lsd.ic.unicamp.br>
      387125fc
  2. 15 11月, 2011 1 次提交
    • L
      Btrfs: fix tree corruption after multi-thread snapshots and inode_cache flush · f1ebcc74
      Liu Bo 提交于
      The btrfs snapshotting code requires that once a root has been
      snapshotted, we don't change it during a commit.
      
      But there are two cases to lead to tree corruptions:
      
      1) multi-thread snapshots can commit serveral snapshots in a transaction,
         and this may change the src root when processing the following pending
         snapshots, which lead to the former snapshots corruptions;
      
      2) the free inode cache was changing the roots when it root the cache,
         which lead to corruptions.
      
      This fixes things by making sure we force COW the block after we create a
      snapshot during commiting a transaction, then any changes to the roots
      will result in COW, and we get all the fs roots and snapshot roots to be
      consistent.
      Signed-off-by: NLiu Bo <liubo2009@cn.fujitsu.com>
      Signed-off-by: NMiao Xie <miaox@cn.fujitsu.com>
      Signed-off-by: NChris Mason <chris.mason@oracle.com>
      f1ebcc74
  3. 11 11月, 2011 11 次提交
    • D
      btrfs: rename the option to nospace_cache · 8965593e
      David Sterba 提交于
      Rename no_space_cache option to nospace_cache to be more consistent with
      the rest, where the simple prefix 'no' is used to negate an option.
      
      The option has been introduced during the -rc1 cycle and there are has not been
      widely used, so it's safe.
      Signed-off-by: NDavid Sterba <dsterba@suse.cz>
      Signed-off-by: NChris Mason <chris.mason@oracle.com>
      8965593e
    • A
      Btrfs: handle bio_add_page failure gracefully in scrub · 69f4cb52
      Arne Jansen 提交于
      Currently scrub fails with ENOMEM when bio_add_page fails. Unfortunately
      dm based targets accept only one page per bio, thus making scrub always
      fails. This patch just submits the current bio when an error is encountered
      and starts a new one.
      Signed-off-by: NArne Jansen <sensille@gmx.net>
      Signed-off-by: NChris Mason <chris.mason@oracle.com>
      69f4cb52
    • M
      Btrfs: fix deadlock caused by the race between relocation · 62f30c54
      Miao Xie 提交于
      We can not do flushable reservation for the relocation when we create snapshot,
      because it may make the transaction commit task and the flush task wait for
      each other and the deadlock happens.
      Signed-off-by: NMiao Xie <miaox@cn.fujitsu.com>
      Signed-off-by: NChris Mason <chris.mason@oracle.com>
      62f30c54
    • J
      Btrfs: only map pages if we know we need them when reading the space cache · 2f120c05
      Josef Bacik 提交于
      People have been running into a warning when loading space cache because the
      page is already mapped when trying to read in a bitmap.  The way we read in
      entries and pages is kind of convoluted, so fix it so that io_ctl_read_entry
      maps the entries if it needs to, and if it hits the end of the page it simply
      unmaps the page.  That way we can unconditionally unmap the io_ctl before
      reading in the bitmap and we should stop hitting these warnings.  Thanks,
      Signed-off-by: NJosef Bacik <josef@redhat.com>
      Signed-off-by: NChris Mason <chris.mason@oracle.com>
      2f120c05
    • M
      Btrfs: fix orphan backref nodes · 76b9e23d
      Miao Xie 提交于
      If the root node of a fs/file tree is in the block group that is
      being relocated, but the others are not in the other block groups.
      when we create a snapshot for this tree between the relocation tree
      creation ends and ->create_reloc_tree is set to 0, Btrfs will create
      some backref nodes that are the lowest nodes of the backrefs cache.
      But we forget to add them into ->leaves list of the backref cache
      and deal with them, and at last, they will triggered BUG_ON().
      
        kernel BUG at fs/btrfs/relocation.c:239!
      
      This patch fixes it by adding them into ->leaves list of backref cache.
      Signed-off-by: NMiao Xie <miaox@cn.fujitsu.com>
      Signed-off-by: NChris Mason <chris.mason@oracle.com>
      76b9e23d
    • M
      Btrfs: Abstract similar code for btrfs_block_rsv_add{, _noflush} · 61b520a9
      Miao Xie 提交于
      btrfs_block_rsv_add{, _noflush}() have similar code, so abstract that code.
      Signed-off-by: NMiao Xie <miaox@cn.fujitsu.com>
      Signed-off-by: NChris Mason <chris.mason@oracle.com>
      61b520a9
    • M
      Btrfs: fix unreleased path in btrfs_orphan_cleanup() · 3254c876
      Miao Xie 提交于
      When we did stress test for the space relocation, the deadlock happened.
      By debugging, We found it was caused by the carelessness that we forgot
      to unlock the read lock of the extent buffers in btrfs_orphan_cleanup()
      before we end the transaction handle, so the transaction commit task waited
      the task, which called btrfs_orphan_cleanup(), to unlock the extent buffer,
      but that task waited the commit task to end the transaction commit, and
      the deadlock happened. Fix it.
      Signed-ff-by: NMiao Xie <miaox@cn.fujitsu.com>
      Signed-off-by: NChris Mason <chris.mason@oracle.com>
      3254c876
    • M
      Btrfs: fix no reserved space for writing out inode cache · ba38eb4d
      Miao Xie 提交于
      I-node cache forgets to reserve the space when writing out it. And when
      we do some stress test, such as synctest, it will trigger WARN_ON() in
      use_block_rsv().
      
      WARNING: at fs/btrfs/extent-tree.c:5718 btrfs_alloc_free_block+0xbf/0x281 [btrfs]()
      ...
      Call Trace:
       [<ffffffff8104df86>] warn_slowpath_common+0x80/0x98
       [<ffffffff8104dfb3>] warn_slowpath_null+0x15/0x17
       [<ffffffffa0369c60>] btrfs_alloc_free_block+0xbf/0x281 [btrfs]
       [<ffffffff810cbcb8>] ? __set_page_dirty_nobuffers+0xfe/0x108
       [<ffffffffa035c040>] __btrfs_cow_block+0x118/0x3b5 [btrfs]
       [<ffffffffa035c7ba>] btrfs_cow_block+0x103/0x14e [btrfs]
       [<ffffffffa035e4c4>] btrfs_search_slot+0x249/0x6a4 [btrfs]
       [<ffffffffa036d086>] btrfs_lookup_inode+0x2a/0x8a [btrfs]
       [<ffffffffa03788b7>] btrfs_update_inode+0xaa/0x141 [btrfs]
       [<ffffffffa036d7ec>] btrfs_save_ino_cache+0xea/0x202 [btrfs]
       [<ffffffffa03a761e>] ? btrfs_update_reloc_root+0x17e/0x197 [btrfs]
       [<ffffffffa0373867>] commit_fs_roots+0xaa/0x158 [btrfs]
       [<ffffffffa03746a6>] btrfs_commit_transaction+0x405/0x731 [btrfs]
       [<ffffffff810690df>] ? wake_up_bit+0x25/0x25
       [<ffffffffa039d652>] ? btrfs_log_dentry_safe+0x43/0x51 [btrfs]
       [<ffffffffa0381c5f>] btrfs_sync_file+0x16a/0x198 [btrfs]
       [<ffffffff81122806>] ? mntput+0x21/0x23
       [<ffffffff8112d150>] vfs_fsync_range+0x18/0x21
       [<ffffffff8112d170>] vfs_fsync+0x17/0x19
       [<ffffffff8112d316>] do_fsync+0x29/0x3e
       [<ffffffff8112d348>] sys_fsync+0xb/0xf
       [<ffffffff81468352>] system_call_fastpath+0x16/0x1b
      
      Sometimes it causes BUG_ON() in the reservation code of the delayed inode
      is triggered.
      
      So we must reserve enough space for inode cache.
      
      Note: If we can not reserve the enough space for inode cache, we will
      give up writing out it.
      Signed-off-by: NMiao Xie <miaox@cn.fujitsu.com>
      Signed-off-by: NChris Mason <chris.mason@oracle.com>
      ba38eb4d
    • M
      Btrfs: fix nocow when deleting the item · 924cd8fb
      Miao Xie 提交于
      btrfs_previous_item() just search the b+ tree, do not COW the nodes or leaves,
      if we modify the result of it, the meta-data will be broken. fix it.
      Signed-off-by: NMiao Xie <miaox@cn.fujitsu.com>
      Signed-off-by: NChris Mason <chris.mason@oracle.com>
      924cd8fb
    • C
    • C
      Btrfs: tweak the delayed inode reservations again · 2115133f
      Chris Mason 提交于
      Josef sent along an incremental to the inode reservation
      code to make sure we try and fall back to directly updating
      the inode item if things go horribly wrong.
      
      This reworks that patch slightly, adding a fallback function
      that will always try to update the inode item directly without
      going through the delayed_inode code.
      Signed-off-by: NChris Mason <chris.mason@oracle.com>
      2115133f
  4. 10 11月, 2011 5 次提交
  5. 09 11月, 2011 2 次提交
    • J
      Btrfs: fix our reservations for updating an inode when completing io · 7fd2ae21
      Josef Bacik 提交于
      People have been reporting ENOSPC crashes in finish_ordered_io.  This is because
      we try to steal from the delalloc block rsv to satisfy a reservation to update
      the inode.  The problem with this is we don't explicitly save space for updating
      the inode when doing delalloc.  This is kind of a problem and we've gotten away
      with this because way back when we just stole from the delalloc reserve without
      any questions, and this worked out fine because generally speaking the leaf had
      been modified either by the mtime update when we did the original write or
      because we just updated the leaf when we inserted the file extent item, only on
      rare occasions had the leaf not actually been modified, and that was still ok
      because we'd just use a block or two out of the over-reservation that is
      delalloc.
      
      Then came the delayed inode stuff.  This is amazing, except it wants a full
      reservation for updating the inode since it may do it at some point down the
      road after we've written the blocks and we have to recow everything again.  This
      worked out because the delayed inode stuff just stole from the global reserve,
      that is until recently when I changed that because it caused other problems.
      
      So here we are, we're doing everything right and being screwed for it.  So take
      an extra reservation for the inode at delalloc reservation time and carry it
      through the life of the delalloc reservation.  If we need it we can steal it in
      the delayed inode stuff.  If we have already stolen it try and do a normal
      metadata reservation.  If that fails try to steal from the delalloc reservation.
      If _that_ fails we'll get a WARN_ON() so I can start thinking of a better way to
      solve this and in the meantime we'll steal from the global reserve.
      
      With this patch I ran xfstests 13 in a loop for a couple of hours and didn't see
      any problems.
      Signed-off-by: NJosef Bacik <josef@redhat.com>
      Signed-off-by: NChris Mason <chris.mason@oracle.com>
      7fd2ae21
    • C
      Btrfs: fix oops on NULL trans handle in btrfs_truncate · 917c16b2
      Chris Mason 提交于
      If we fail to reserve space in the transaction during truncate, we can
      error out with a NULL trans handle.  The cleanup code needs an extra
      check to make sure we aren't trying to use the bad handle.
      Signed-off-by: NChris Mason <chris.mason@oracle.com>
      917c16b2
  6. 08 11月, 2011 1 次提交
    • S
      btrfs: fix double-free 'tree_root' in 'btrfs_mount()' · 45ea6095
      slyich@gmail.com 提交于
      On error path 'tree_root' is treed in 'free_fs_info()'.
      No need to free it explicitely. Noticed by SLUB in debug mode:
      
      Complete reproducer under usermode linux (discovered on real
      machine):
      
          bdev=/dev/ubda
          btr_root=/btr
          /mkfs.btrfs $bdev
          mount $bdev $btr_root
          mkdir $btr_root/subvols/
          cd $btr_root/subvols/
          /btrfs su cr foo
          /btrfs su cr bar
          mount $bdev -osubvol=subvols/foo $btr_root/subvols/bar
          umount $btr_root/subvols/bar
      
      which gives
      
      device fsid 4d55aa28-45b1-474b-b4ec-da912322195e devid 1 transid 7 /dev/ubda
      =============================================================================
      BUG kmalloc-2048: Object already free
      -----------------------------------------------------------------------------
      
      INFO: Allocated in btrfs_mount+0x389/0x7f0 age=0 cpu=0 pid=277
      INFO: Freed in btrfs_mount+0x51c/0x7f0 age=0 cpu=0 pid=277
      INFO: Slab 0x0000000062886200 objects=15 used=9 fp=0x0000000070b4d2d0 flags=0x4081
      INFO: Object 0x0000000070b4d2d0 @offset=21200 fp=0x0000000070b4a968
      ...
      Call Trace:
      70b31948:  [<6008c522>] print_trailer+0xe2/0x130
      70b31978:  [<6008c5aa>] object_err+0x3a/0x50
      70b319a8:  [<6008e242>] free_debug_processing+0x142/0x2a0
      70b319e0:  [<600ebf6f>] btrfs_mount+0x55f/0x7f0
      70b319f8:  [<6008e5c1>] __slab_free+0x221/0x2d0
      Signed-off-by: NSergei Trofimovich <slyfox@gentoo.org>
      Cc: Arne Jansen <sensille@gmx.net>
      Cc: Chris Mason <chris.mason@oracle.com>
      Cc: David Sterba <dsterba@suse.cz>
      Signed-off-by: NChris Mason <chris.mason@oracle.com>
      45ea6095
  7. 07 11月, 2011 1 次提交
  8. 06 11月, 2011 16 次提交