1. 09 12月, 2006 1 次提交
  2. 08 12月, 2006 1 次提交
  3. 03 10月, 2006 1 次提交
    • D
      [PATCH] VFS: Make filldir_t and struct kstat deal in 64-bit inode numbers · afefdbb2
      David Howells 提交于
      These patches make the kernel pass 64-bit inode numbers internally when
      communicating to userspace, even on a 32-bit system.  They are required
      because some filesystems have intrinsic 64-bit inode numbers: NFS3+ and XFS
      for example.  The 64-bit inode numbers are then propagated to userspace
      automatically where the arch supports it.
      
      Problems have been seen with userspace (eg: ld.so) using the 64-bit inode
      number returned by stat64() or getdents64() to differentiate files, and
      failing because the 64-bit inode number space was compressed to 32-bits, and
      so overlaps occur.
      
      This patch:
      
      Make filldir_t take a 64-bit inode number and struct kstat carry a 64-bit
      inode number so that 64-bit inode numbers can be passed back to userspace.
      
      The stat functions then returns the full 64-bit inode number where
      available and where possible.  If it is not possible to represent the inode
      number supplied by the filesystem in the field provided by userspace, then
      error EOVERFLOW will be issued.
      
      Similarly, the getdents/readdir functions now pass the full 64-bit inode
      number to userspace where possible, returning EOVERFLOW instead when a
      directory entry is encountered that can't be properly represented.
      
      Note that this means that some inodes will not be stat'able on a 32-bit
      system with old libraries where they were before - but it does mean that
      there will be no ambiguity over what a 32-bit inode number refers to.
      
      Note similarly that directory scans may be cut short with an error on a
      32-bit system with old libraries where the scan would work before for the
      same reasons.
      
      It is judged unlikely that this situation will occur because modern glibc
      uses 64-bit capable versions of stat and getdents class functions
      exclusively, and that older systems are unlikely to encounter
      unrepresentable inode numbers anyway.
      
      [akpm: alpha build fix]
      Signed-off-by: NDavid Howells <dhowells@redhat.com>
      Cc: Trond Myklebust <trond.myklebust@fys.uio.no>
      Cc: Al Viro <viro@zeniv.linux.org.uk>
      Signed-off-by: NAndrew Morton <akpm@osdl.org>
      Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
      afefdbb2
  4. 27 9月, 2006 1 次提交
  5. 01 7月, 2006 1 次提交
  6. 28 4月, 2006 1 次提交
  7. 12 2月, 2006 1 次提交
    • U
      [PATCH] fstatat64 support · cff2b760
      Ulrich Drepper 提交于
      The *at patches introduced fstatat and, due to inusfficient research, I
      used the newfstat functions generally as the guideline.  The result is that
      on 32-bit platforms we don't have all the information needed to implement
      fstatat64.
      
      This patch modifies the code to pass up 64-bit information if
      __ARCH_WANT_STAT64 is defined.  I renamed the syscall entry point to make
      this clear.  Other archs will continue to use the existing code.  On x86-64
      the compat code is implemented using a new sys32_ function.  this is what
      is done for the other stat syscalls as well.
      
      This patch might break some other archs (those which define
      __ARCH_WANT_STAT64 and which already wired up the syscall).  Yet others
      might need changes to accomodate the compatibility mode.  I really don't
      want to do that work because all this stat handling is a mess (more so in
      glibc, but the kernel is also affected).  It should be done by the arch
      maintainers.  I'll provide some stand-alone test shortly.  Those who are
      eager could compile glibc and run 'make check' (no installation needed).
      
      The patch below has been tested on x86 and x86-64.
      Signed-off-by: NUlrich Drepper <drepper@redhat.com>
      Cc: Christoph Hellwig <hch@lst.de>
      Cc: Andi Kleen <ak@muc.de>
      Signed-off-by: NAndrew Morton <akpm@osdl.org>
      Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
      cff2b760
  8. 19 1月, 2006 1 次提交
    • U
      [PATCH] vfs: *at functions: core · 5590ff0d
      Ulrich Drepper 提交于
      Here is a series of patches which introduce in total 13 new system calls
      which take a file descriptor/filename pair instead of a single file
      name.  These functions, openat etc, have been discussed on numerous
      occasions.  They are needed to implement race-free filesystem traversal,
      they are necessary to implement a virtual per-thread current working
      directory (think multi-threaded backup software), etc.
      
      We have in glibc today implementations of the interfaces which use the
      /proc/self/fd magic.  But this code is rather expensive.  Here are some
      results (similar to what Jim Meyering posted before).
      
      The test creates a deep directory hierarchy on a tmpfs filesystem.  Then
      rm -fr is used to remove all directories.  Without syscall support I get
      this:
      
      real    0m31.921s
      user    0m0.688s
      sys     0m31.234s
      
      With syscall support the results are much better:
      
      real    0m20.699s
      user    0m0.536s
      sys     0m20.149s
      
      The interfaces are for obvious reasons currently not much used.  But they'll
      be used.  coreutils (and Jeff's posixutils) are already using them.
      Furthermore, code like ftw/fts in libc (maybe even glob) will also start using
      them.  I expect a patch to make follow soon.  Every program which is walking
      the filesystem tree will benefit.
      Signed-off-by: NUlrich Drepper <drepper@redhat.com>
      Signed-off-by: NAlexey Dobriyan <adobriyan@gmail.com>
      Cc: Christoph Hellwig <hch@lst.de>
      Cc: Al Viro <viro@ftp.linux.org.uk>
      Acked-by: NIngo Molnar <mingo@elte.hu>
      Cc: Michael Kerrisk <mtk-manpages@gmx.net>
      Signed-off-by: NAndrew Morton <akpm@osdl.org>
      Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
      5590ff0d
  9. 17 4月, 2005 1 次提交
    • L
      Linux-2.6.12-rc2 · 1da177e4
      Linus Torvalds 提交于
      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