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  1. 09 2月, 2009 1 次提交
  3. 01 12月, 2008 2 次提交
  5. 30 10月, 2008 2 次提交
  7. 14 8月, 2008 1 次提交
    • D
      CRED: Introduce credential access wrappers · 9e2b2dc4
      由 David Howells 提交于 
      The patches that are intended to introduce copy-on-write credentials for 2.6.28
require abstraction of access to some fields of the task structure,
particularly for the case of one task accessing another's credentials where RCU
will have to be observed.

Introduced here are trivial no-op versions of the desired accessors for current
and other tasks so that other subsystems can start to be converted over more
easily.

Wrappers are introduced into a new header (linux/cred.h) for UID/GID,
EUID/EGID, SUID/SGID, FSUID/FSGID, cap_effective and current's subscribed
user_struct.  These wrappers are macros because the ordering between header
files mitigates against making them inline functions.

linux/cred.h is #included from linux/sched.h.

Further, XFS is modified such that it no longer defines and uses parameterised
versions of current_fs[ug]id(), thus getting rid of the namespace collision
otherwise incurred.
Signed-off-by: NDavid Howells <dhowells@redhat.com>
Signed-off-by: NJames Morris <jmorris@namei.org>
      9e2b2dc4
  9. 13 8月, 2008 3 次提交
  11. 28 7月, 2008 2 次提交
    • E
      [XFS] Pack some shortform dir2 structures for the ARM old ABI · ae23a5e8
      由 Eric Sandeen 提交于 
      architecture.

This should fix the longstanding issues with xfs and old ABI arm boxes,
which lead to various asserts and xfs shutdowns, and for which an
(incorrect) patch has been floating around for years.

I've verified this patch by comparing the on-disk structure layouts using
pahole from the dwarves package, as well as running through a bit of xfsqa
under qemu-arm, modified so that the check/repair phase after each test
actually executes check/repair from the x86 host, on the filesystem
populated by the arm emulator. Thus far it all looks good.

There are 2 other structures with extra padding at the end, but they don't
seem to cause trouble. I suppose they could be packed as well:
xfs_dir2_data_unused_t and xfs_dir2_sf_t.

Note that userspace needs a similar treatment, and any filesystems which
were running with the previous rogue "fix" will now see corruption (either
in the kernel, or during xfs_repair) with this fix properly in place; it
may be worth teaching xfs_repair to identify and fix that specific issue.

SGI-PV: 982930

SGI-Modid: xfs-linux-melb:xfs-kern:31280a
Signed-off-by: NEric Sandeen <sandeen@sandeen.net>
Signed-off-by: NTim Shimmin <tes@sgi.com>
Signed-off-by: NLachlan McIlroy <lachlan@sgi.com>
      ae23a5e8
    • B
      [XFS] XFS: ASCII case-insensitive support · 189f4bf2
      由 Barry Naujok 提交于 
      Implement ASCII case-insensitive support. It's primary purpose is for
supporting existing filesystems that already use this case-insensitive
mode migrated from IRIX. But, if you only need ASCII-only case-insensitive
support (ie. English only) and will never use another language, then this
mode is perfectly adequate.

ASCII-CI is implemented by generating hashes based on lower-case letters
and doing lower-case compares. It implements a new xfs_nameops vector for
doing the hashes and comparisons for all filename operations.

To create a filesystem with this CI mode, use: # mkfs.xfs -n version=ci
<device>

SGI-PV: 981516
SGI-Modid: xfs-linux-melb:xfs-kern:31209a
Signed-off-by: NBarry Naujok <bnaujok@sgi.com>
Signed-off-by: NChristoph Hellwig <hch@infradead.org>
      189f4bf2
  13. 30 4月, 2008 2 次提交
  15. 29 4月, 2008 1 次提交
  17. 18 4月, 2008 1 次提交
  19. 07 2月, 2008 3 次提交
  21. 16 10月, 2007 1 次提交
  23. 15 10月, 2007 2 次提交
  25. 14 7月, 2007 1 次提交
    • D
      [XFS] Concurrent Multi-File Data Streams · 2a82b8be
      由 David Chinner 提交于 
      In media spaces, video is often stored in a frame-per-file format. When
dealing with uncompressed realtime HD video streams in this format, it is
crucial that files do not get fragmented and that multiple files a placed
contiguously on disk.

When multiple streams are being ingested and played out at the same time,
it is critical that the filesystem does not cross the streams and
interleave them together as this creates seek and readahead cache miss
latency and prevents both ingest and playout from meeting frame rate
targets.

This patch set creates a "stream of files" concept into the allocator to
place all the data from a single stream contiguously on disk so that RAID
array readahead can be used effectively. Each additional stream gets
placed in different allocation groups within the filesystem, thereby
ensuring that we don't cross any streams. When an AG fills up, we select a
new AG for the stream that is not in use.

The core of the functionality is the stream tracking - each inode that we
create in a directory needs to be associated with the directories' stream.
Hence every time we create a file, we look up the directories' stream
object and associate the new file with that object.

Once we have a stream object for a file, we use the AG that the stream
object point to for allocations. If we can't allocate in that AG (e.g. it
is full) we move the entire stream to another AG. Other inodes in the same
stream are moved to the new AG on their next allocation (i.e. lazy
update).

Stream objects are kept in a cache and hold a reference on the inode.
Hence the inode cannot be reclaimed while there is an outstanding stream
reference. This means that on unlink we need to remove the stream
association and we also need to flush all the associations on certain
events that want to reclaim all unreferenced inodes (e.g. filesystem
freeze).

SGI-PV: 964469
SGI-Modid: xfs-linux-melb:xfs-kern:29096a
Signed-off-by: NDavid Chinner <dgc@sgi.com>
Signed-off-by: NBarry Naujok <bnaujok@sgi.com>
Signed-off-by: NDonald Douwsma <donaldd@sgi.com>
Signed-off-by: NChristoph Hellwig <hch@infradead.org>
Signed-off-by: NTim Shimmin <tes@sgi.com>
Signed-off-by: NVlad Apostolov <vapo@sgi.com>
      2a82b8be
  27. 10 7月, 2007 1 次提交
  29. 13 2月, 2007 1 次提交
  31. 28 9月, 2006 2 次提交
  33. 11 7月, 2006 1 次提交
  35. 01 7月, 2006 1 次提交
  37. 27 6月, 2006 1 次提交
  39. 20 6月, 2006 1 次提交
  41. 09 6月, 2006 2 次提交
  43. 31 3月, 2006 1 次提交
  45. 17 3月, 2006 1 次提交
  47. 14 3月, 2006 4 次提交
  49. 11 1月, 2006 2 次提交