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  1. 04 7月, 2006 1 次提交
  3. 24 6月, 2006 1 次提交
  5. 22 6月, 2006 1 次提交
  7. 15 6月, 2006 1 次提交
    • S
      [GFS2] Fix unlinked file handling · feaa7bba
      由 Steven Whitehouse 提交于 
      This patch fixes the way we have been dealing with unlinked,
but still open files. It removes all limits (other than memory
for inodes, as per every other filesystem) on numbers of these
which we can support on GFS2. It also means that (like other
fs) its the responsibility of the last process to close the file
to deallocate the storage, rather than the person who did the
unlinking. Note that with GFS2, those two events might take place
on different nodes.

Also there are a number of other changes:

 o We use the Linux inode subsystem as it was intended to be
used, wrt allocating GFS2 inodes
 o The Linux inode cache is now the point which we use for
local enforcement of only holding one copy of the inode in
core at once (previous to this we used the glock layer).
 o We no longer use the unlinked "special" file. We just ignore it
completely. This makes unlinking more efficient.
 o We now use the 4th block allocation state. The previously unused
state is used to track unlinked but still open inodes.
 o gfs2_inoded is no longer needed
 o Several fields are now no longer needed (and removed) from the in
core struct gfs2_inode
 o Several fields are no longer needed (and removed) from the in core
superblock

There are a number of future possible optimisations and clean ups
which have been made possible by this patch.
Signed-off-by: NSteven Whitehouse <swhiteho@redhat.com>
      feaa7bba
  9. 19 5月, 2006 2 次提交
  11. 13 5月, 2006 1 次提交
  13. 26 4月, 2006 1 次提交
  15. 07 4月, 2006 1 次提交
    • S
      [GFS2] Fix a ref count bug and other clean ups · b09e593d
      由 Steven Whitehouse 提交于 
      This fixes a ref count bug that sometimes showed up a umount time
(causing it to hang) but it otherwise mostly harmless. At the same
time there are some clean ups including making the log operations
structures const, moving a memory allocation so that its not done
in the fast path of checking to see if there is an outstanding
transaction related to a particular glock.

Removes the sd_log_wrap varaible which was updated, but never actually
used anywhere. Updates the gfs2 ioctl() to run without the kernel lock
(which it never needed anyway). Removes the "invalidate inodes" loop
from GFS2's put_super routine. This is done in kill super anyway so
we don't need to do it here. The loop was also bogus in that if there
are any inodes "stuck" at this point its a bug and we need to know
about it rather than hide it by hanging forever.
Signed-off-by: NSteven Whitehouse <swhiteho@redhat.com>
      b09e593d
  17. 05 4月, 2006 1 次提交
  19. 01 4月, 2006 2 次提交
    • S
      [GFS2] Update GFS2 for the recent pull from Linus · 8628de05
      由 Steven Whitehouse 提交于 
      Some interfaces have changed. In particular one of the posix
locking functions has changed prototype, along with the
address space operation invalidatepage and the block getting
callback to the direct IO function.

In addition add the splice file operations. These will need to
be updated to support AOP_TRUNCATED_PAGE before they will be
of much use to us.
Signed-off-by: NSteven Whitehouse <swhiteho@redhat.com>
      8628de05
    • S
      [GFS2] Update ioctl() to new interface · 7ea9ea83
      由 Steven Whitehouse 提交于 
      This is designed as a fs independent way to set flags on a
particular inode. The values of the ioctl() and flags are
designed to be identical to the ext2/3 values. Assuming that
this plan is acceptable to people in general, the plan is to
then move other fs across to using the same set of #defines,
etc.
Signed-off-by: NSteven Whitehouse <swhiteho@redhat.com>
      7ea9ea83
  21. 29 3月, 2006 1 次提交
    • S
      [GFS2] Further updates to dir and logging code · 71b86f56
      由 Steven Whitehouse 提交于 
      This reduces the size of the directory code by about 3k and gets
readdir() to use the functions which were introduced in the previous
directory code update.

Two memory allocations are merged into one. Eliminates zeroing of some
buffers which were never used before they were initialised by
other data.

There is still scope for further improvement in the directory code.

On the logging side, a hand created mutex has been replaced by a
standard Linux mutex in the log allocation code.
Signed-off-by: NSteven Whitehouse <swhiteho@redhat.com>
      71b86f56
  23. 22 3月, 2006 1 次提交
  25. 28 2月, 2006 2 次提交
  27. 23 2月, 2006 2 次提交
  29. 21 2月, 2006 1 次提交
  31. 15 2月, 2006 1 次提交
    • S
      [GFS2] Fix for lock recursion problem for internal files · 61a30dcb
      由 Steven Whitehouse 提交于 
      Two internal files which are read through the gfs2_internal_read()
routine were already locked when the routine was called and this
do not need locking at the redapages level.

This patch introduces a struct file which is used as a sentinal
so that readpage will only perform locking in the case that the
struct file passed to it is _not_ equal to this sentinal.

Since the comments in the generic kernel code indicate that the
struct file will never be used for anything other than passing
straight through to readpage(), this should be ok.
Signed-off-by: NSteven Whitehouse <swhiteho@redhat.com>
      61a30dcb
  33. 14 2月, 2006 1 次提交
    • S
      [GFS2] Put back O_DIRECT support · d1665e41
      由 Steven Whitehouse 提交于 
      This patch adds back O_DIRECT support with various caveats
attached:

 1. Journaled data can be read via O_DIRECT since its now the
    same on disk format as normal data files.
 2. Journaled data writes with O_DIRECT will be failed sliently
    back to normal writes (should we really do this I wonder or
    should we return an error instead?)
 3. Stuffed files will be failed back to normal buffered I/O
 4. All the usual corner cases (write beyond current end of file,
    write to an unallocated block) will also revert to normal buffered I/O.

The I/O path is slightly odd as reads arrive at the page cache layer
with the lock for the file already held, but writes arrive unlocked.
Signed-off-by: NSteven Whitehouse <swhiteho@redhat.com>
      d1665e41
  35. 08 2月, 2006 1 次提交
    • S
      [GFS2] Make journaled data files identical to normal files on disk · 18ec7d5c
      由 Steven Whitehouse 提交于 
      This is a very large patch, with a few still to be resolved issues
so you might want to check out the previous head of the tree since
this is known to be unstable. Fixes for the various bugs will be
forthcoming shortly.

This patch removes the special data format which has been used
up till now for journaled data files. Directories still retain the
old format so that they will remain on disk compatible with earlier
releases. As a result you can now do the following with journaled
data files:

 1) mmap them
 2) export them over NFS
 3) convert to/from normal files whenever you want to (the zero length
    restriction is gone)

In addition the level at which GFS' locking is done has changed for all
files (since they all now use the page cache) such that the locking is
done at the page cache level rather than the level of the fs operations.
This should mean that things like loopback mounts and other things which
touch the page cache directly should now work.

Current known issues:

 1. There is a lock mode inversion problem related to the resource
    group hold function which needs to be resolved.
 2. Any significant amount of I/O causes an oops with an offset of hex 320
    (NULL pointer dereference) which appears to be related to a journaled data
    buffer appearing on a list where it shouldn't be.
 3. Direct I/O writes are disabled for the time being (will reappear later)
 4. There is probably a deadlock between the page lock and GFS' locks under
    certain combinations of mmap and fs operation I/O.
 5. Issue relating to ref counting on internally used inodes causes a hang
    on umount (discovered before this patch, and not fixed by it)
 6. One part of the directory metadata is different from GFS1 and will need
    to be resolved before next release.
Signed-off-by: NSteven Whitehouse <swhiteho@redhat.com>
      18ec7d5c
  37. 18 1月, 2006 2 次提交
  39. 17 1月, 2006 1 次提交