1. 23 Jun, 2006 2 commits
    • David Howells's avatar
      [PATCH] VFS: Permit filesystem to perform statfs with a known root dentry · 726c3342
      David Howells authored
      
      
      Give the statfs superblock operation a dentry pointer rather than a superblock
      pointer.
      
      This complements the get_sb() patch.  That reduced the significance of
      sb->s_root, allowing NFS to place a fake root there.  However, NFS does
      require a dentry to use as a target for the statfs operation.  This permits
      the root in the vfsmount to be used instead.
      
      linux/mount.h has been added where necessary to make allyesconfig build
      successfully.
      
      Interest has also been expressed for use with the FUSE and XFS filesystems.
      Signed-off-by: default avatarDavid Howells <dhowells@redhat.com>
      Acked-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
      Cc: Nathan Scott <nathans@sgi.com>
      Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
      726c3342
    • David Howells's avatar
      [PATCH] VFS: Permit filesystem to override root dentry on mount · 454e2398
      David Howells authored
      
      
      Extend the get_sb() filesystem operation to take an extra argument that
      permits the VFS to pass in the target vfsmount that defines the mountpoint.
      
      The filesystem is then required to manually set the superblock and root dentry
      pointers.  For most filesystems, this should be done with simple_set_mnt()
      which will set the superblock pointer and then set the root dentry to the
      superblock's s_root (as per the old default behaviour).
      
      The get_sb() op now returns an integer as there's now no need to return the
      superblock pointer.
      
      This patch permits a superblock to be implicitly shared amongst several mount
      points, such as can be done with NFS to avoid potential inode aliasing.  In
      such a case, simple_set_mnt() would not be called, and instead the mnt_root
      and mnt_sb would be set directly.
      
      The patch also makes the following changes:
      
       (*) the get_sb_*() convenience functions in the core kernel now take a vfsmount
           pointer argument and return an integer, so most filesystems have to change
           very little.
      
       (*) If one of the convenience function is not used, then get_sb() should
           normally call simple_set_mnt() to instantiate the vfsmount. This will
           always return 0, and so can be tail-called from get_sb().
      
       (*) generic_shutdown_super() now calls shrink_dcache_sb() to clean up the
           dcache upon superblock destruction rather than shrink_dcache_anon().
      
           This is required because the superblock may now have multiple trees that
           aren't actually bound to s_root, but that still need to be cleaned up. The
           currently called functions assume that the whole tree is rooted at s_root,
           and that anonymous dentries are not the roots of trees which results in
           dentries being left unculled.
      
           However, with the way NFS superblock sharing are currently set to be
           implemented, these assumptions are violated: the root of the filesystem is
           simply a dummy dentry and inode (the real inode for '/' may well be
           inaccessible), and all the vfsmounts are rooted on anonymous[*] dentries
           with child trees.
      
           [*] Anonymous until discovered from another tree.
      
       (*) The documentation has been adjusted, including the additional bit of
           changing ext2_* into foo_* in the documentation.
      
      [akpm@osdl.org: convert ipath_fs, do other stuff]
      Signed-off-by: default avatarDavid Howells <dhowells@redhat.com>
      Acked-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
      Cc: Nathan Scott <nathans@sgi.com>
      Cc: Roland Dreier <rolandd@cisco.com>
      Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
      454e2398
  2. 25 Mar, 2006 1 commit
  3. 24 Mar, 2006 3 commits
    • Paul Jackson's avatar
      [PATCH] cpuset memory spread: slab cache format · fffb60f9
      Paul Jackson authored
      
      
      Rewrap the overly long source code lines resulting from the previous
      patch's addition of the slab cache flag SLAB_MEM_SPREAD.  This patch
      contains only formatting changes, and no function change.
      Signed-off-by: default avatarPaul Jackson <pj@sgi.com>
      Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
      fffb60f9
    • Paul Jackson's avatar
      [PATCH] cpuset memory spread: slab cache filesystems · 4b6a9316
      Paul Jackson authored
      
      
      Mark file system inode and similar slab caches subject to SLAB_MEM_SPREAD
      memory spreading.
      
      If a slab cache is marked SLAB_MEM_SPREAD, then anytime that a task that's
      in a cpuset with the 'memory_spread_slab' option enabled goes to allocate
      from such a slab cache, the allocations are spread evenly over all the
      memory nodes (task->mems_allowed) allowed to that task, instead of favoring
      allocation on the node local to the current cpu.
      
      The following inode and similar caches are marked SLAB_MEM_SPREAD:
      
          file                               cache
          ====                               =====
          fs/adfs/super.c                    adfs_inode_cache
          fs/affs/super.c                    affs_inode_cache
          fs/befs/linuxvfs.c                 befs_inode_cache
          fs/bfs/inode.c                     bfs_inode_cache
          fs/block_dev.c                     bdev_cache
          fs/cifs/cifsfs.c                   cifs_inode_cache
          fs/coda/inode.c                    coda_inode_cache
          fs/dquot.c                         dquot
          fs/efs/super.c                     efs_inode_cache
          fs/ext2/super.c                    ext2_inode_cache
          fs/ext2/xattr.c (fs/mbcache.c)     ext2_xattr
          fs/ext3/super.c                    ext3_inode_cache
          fs/ext3/xattr.c (fs/mbcache.c)     ext3_xattr
          fs/fat/cache.c                     fat_cache
          fs/fat/inode.c                     fat_inode_cache
          fs/freevxfs/vxfs_super.c           vxfs_inode
          fs/hpfs/super.c                    hpfs_inode_cache
          fs/isofs/inode.c                   isofs_inode_cache
          fs/jffs/inode-v23.c                jffs_fm
          fs/jffs2/super.c                   jffs2_i
          fs/jfs/super.c                     jfs_ip
          fs/minix/inode.c                   minix_inode_cache
          fs/ncpfs/inode.c                   ncp_inode_cache
          fs/nfs/direct.c                    nfs_direct_cache
          fs/nfs/inode.c                     nfs_inode_cache
          fs/ntfs/super.c                    ntfs_big_inode_cache_name
          fs/ntfs/super.c                    ntfs_inode_cache
          fs/ocfs2/dlm/dlmfs.c               dlmfs_inode_cache
          fs/ocfs2/super.c                   ocfs2_inode_cache
          fs/proc/inode.c                    proc_inode_cache
          fs/qnx4/inode.c                    qnx4_inode_cache
          fs/reiserfs/super.c                reiser_inode_cache
          fs/romfs/inode.c                   romfs_inode_cache
          fs/smbfs/inode.c                   smb_inode_cache
          fs/sysv/inode.c                    sysv_inode_cache
          fs/udf/super.c                     udf_inode_cache
          fs/ufs/super.c                     ufs_inode_cache
          net/socket.c                       sock_inode_cache
          net/sunrpc/rpc_pipe.c              rpc_inode_cache
      
      The choice of which slab caches to so mark was quite simple.  I marked
      those already marked SLAB_RECLAIM_ACCOUNT, except for fs/xfs, dentry_cache,
      inode_cache, and buffer_head, which were marked in a previous patch.  Even
      though SLAB_RECLAIM_ACCOUNT is for a different purpose, it marks the same
      potentially large file system i/o related slab caches as we need for memory
      spreading.
      
      Given that the rule now becomes "wherever you would have used a
      SLAB_RECLAIM_ACCOUNT slab cache flag before (usually the inode cache), use
      the SLAB_MEM_SPREAD flag too", this should be easy enough to maintain.
      Future file system writers will just copy one of the existing file system
      slab cache setups and tend to get it right without thinking.
      Signed-off-by: default avatarPaul Jackson <pj@sgi.com>
      Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
      4b6a9316
    • Adrian Bunk's avatar
      [PATCH] fs/ext2/: proper ext2_get_parent() prototype · 2c221290
      Adrian Bunk authored
      
      
      Add a proper prototype for ext2_get_parent().
      Signed-off-by: default avatarAdrian Bunk <bunk@stusta.de>
      Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
      2c221290
  4. 03 Feb, 2006 1 commit
  5. 09 Jan, 2006 1 commit
  6. 14 Nov, 2005 1 commit
  7. 09 Nov, 2005 1 commit
  8. 07 Sep, 2005 1 commit
    • Mark Bellon's avatar
      [PATCH] disk quotas fail when /etc/mtab is symlinked to /proc/mounts · 8fc2751b
      Mark Bellon authored
      
      
      If /etc/mtab is a regular file all of the mount options (of a file system)
      are written to /etc/mtab by the mount command.  The quota tools look there
      for the quota strings for their operation.  If, however, /etc/mtab is a
      symlink to /proc/mounts (a "good thing" in some environments) the tools
      don't write anything - they assume the kernel will take care of things.
      
      While the quota options are sent down to the kernel via the mount system
      call and the file system codes handle them properly unfortunately there is
      no code to echo the quota strings into /proc/mounts and the quota tools
      fail in the symlink case.
      
      The attached patchs modify the EXT[2|3] and JFS codes to add the necessary
      hooks.  The show_options function of each file system in these patches
      currently deal with only those things that seemed related to quotas;
      especially in the EXT3 case more can be done (later?).
      
      Jan Kara also noted the difficulty in moving these changes above the FS
      codes responding similarly to myself to Andrew's comment about possible
      VFS migration. Issue summary:
      
       - FS codes have to process the entire string of options anyway.
      
       - Only FS codes that use quotas must have a show_options function (for
         quotas to work properly) however quotas are only used in a small number
         of FS.
      
       - Since most of the quota using FS support other options these FS codes
         should have the a show_options function to show those options - and the
         quota echoing becomes virtually negligible.
      
      Based on feedback I have modified my patches from the original:
      
         JFS a missing patch has been restored to the posting
         EXT[2|3] and JFS always use the show_options function
             - Each FS has at least one FS specific option displayed
             - QUOTA output is under a CONFIG_QUOTA ifdef
             - a follow-on patch will add a multitude of options for each FS
         EXT[2|3] and JFS "quota" is treated as "usrquota"
         EXT3 journalled data check for journalled quota removed
         EXT[2|3] mount when quota specified but not compiled in
      
       - no changes from my original patch.  I tested the patch and the codes
         warn but
      
       - still mount.  With all due respection I believe the comments
         otherwise were a
      
       - misread of the patch.  Please reread/test and comment.  XFS patch
         removed - the XFS team already made the necessary changes EXT3 mixing
         old and new quotas are handled differently (not purely exclusive)
      
       - if old and new quotas for the same type are used together the old
         type is silently depricated for compatability (e.g.  usrquota and
         usrjquota)
      
       - mixing of old and new quotas is an error (e.g.  usrjquota and
         grpquota)
      Signed-off-by: default avatarMark Bellon <mbellon@mvista.com>
      Acked-by: default avatarDave Kleikamp <shaggy@austin.ibm.com>
      Cc: Jan Kara <jack@ucw.cz>
      Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
      8fc2751b
  9. 12 Jul, 2005 1 commit
  10. 24 Jun, 2005 1 commit
  11. 16 Apr, 2005 2 commits
    • Bernard Blackham's avatar
      [PATCH] ext2 corruption - regression between 2.6.9 and 2.6.10 · e072c6f2
      Bernard Blackham authored
      
      
      Whilst trying to stress test a Promise SX8 card, we stumbled across
      some nasty filesystem corruption in ext2. Our tests involved
      creating an ext2 partition, mounting, running several concurrent
      fsx's over it, umounting, and fsck'ing, all scripted[1]. The fsck
      would always return with errors.
      
      This regression was traced back to a change between 2.6.9 and
      2.6.10, which moves the functionality of ext2_put_inode into
      ext2_clear_inode.  The attached patch reverses this change, and
      eliminated the source of corruption.
      
      Mingming Cao <cmm@us.ibm.com> said:
      
      I think his patch for ext2 is correct.  The corruption on ext3 is not the same
      issue he saw on ext2.  I believe that's the race between discard reservation
      and reservation in-use that we already fixed it in 2.6.12- rc1.
      
      For the problem related to ext2, at the time when we design reservation for
      ext3, we decide we only need to discard the reservation at the last file
      close, so we have ext3_discard_reservation on iput_final- >ext3_clear_inode.
      
      The ext2 handle discard preallocation differently at that time, it discard the
      preallocation at each iput(), not in input_final(), so we think it's
      unnecessary to thrash it so frequently, and the right thing to do, as we did
      for ext3 reservation, discard preallocation on last iput().  So we moved the
      ext2_discard_preallocation from ext2_put_inode(0 to ext2_clear_inode.
      
      Since ext2 preallocation is doing pre-allocation on disk, so it is possible
      that at the unmount time, someone is still hold the reference of the inode, so
      the preallocation for a file is not discard yet, so we still mark those blocks
      allocated on disk, while they are not actually in the inode's block map, so
      fsck will catch/fix that error later.
      
      This is not a issue for ext3, as ext3 reservation(pre-allocation) is done in
      memory.
      Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
      e072c6f2
    • Linus Torvalds's avatar
      Linux-2.6.12-rc2 · 1da177e4
      Linus Torvalds authored
      Initial git repository build. I'm not bothering with the full history,
      even though we have it. We can create a separate "historical" git
      archive of that later if we want to, and in the meantime it's about
      3.2GB when imported into git - space that would just make the early
      git days unnecessarily complicated, when we don't have a lot of good
      infrastructure for it.
      
      Let it rip!
      1da177e4