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  1. 14 7月, 2007 2 次提交
  3. 08 5月, 2007 3 次提交
    • L
      [XFS] Fix to prevent the notorious 'NULL files' problem after a crash. · ba87ea69
      由 Lachlan McIlroy 提交于 
      The problem that has been addressed is that of synchronising updates of
the file size with writes that extend a file. Without the fix the update
of a file's size, as a result of a write beyond eof, is independent of
when the cached data is flushed to disk. Often the file size update would
be written to the filesystem log before the data is flushed to disk. When
a system crashes between these two events and the filesystem log is
replayed on mount the file's size will be set but since the contents never
made it to disk the file is full of holes. If some of the cached data was
flushed to disk then it may just be a section of the file at the end that
has holes.

There are existing fixes to help alleviate this problem, particularly in
the case where a file has been truncated, that force cached data to be
flushed to disk when the file is closed. If the system crashes while the
file(s) are still open then this flushing will never occur.

The fix that we have implemented is to introduce a second file size,
called the in-memory file size, that represents the current file size as
viewed by the user. The existing file size, called the on-disk file size,
is the one that get's written to the filesystem log and we only update it
when it is safe to do so. When we write to a file beyond eof we only
update the in- memory file size in the write operation. Later when the I/O
operation, that flushes the cached data to disk completes, an I/O
completion routine will update the on-disk file size. The on-disk file
size will be updated to the maximum offset of the I/O or to the value of
the in-memory file size if the I/O includes eof.

SGI-PV: 958522
SGI-Modid: xfs-linux-melb:xfs-kern:28322a
Signed-off-by: NLachlan McIlroy <lachlan@sgi.com>
Signed-off-by: NDavid Chinner <dgc@sgi.com>
Signed-off-by: NTim Shimmin <tes@sgi.com>
      ba87ea69
    • E
      [XFS] remove more misc. unused args · e9ed9d22
      由 Eric Sandeen 提交于 
      Patch provided by Eric Sandeen.

SGI-PV: 961695
SGI-Modid: xfs-linux-melb:xfs-kern:28205a
Signed-off-by: NEric Sandeen <sandeen@sandeen.net>
Signed-off-by: NLachlan McIlroy <lachlan@sgi.com>
Signed-off-by: NTim Shimmin <tes@sgi.com>
      e9ed9d22
    • E
      [XFS] The last argument "lsn" of xfs_trans_commit() is always called with · 1c72bf90
      由 Eric Sandeen 提交于 
      NULL.

Patch provided by Eric Sandeen.

SGI-PV: 961693
SGI-Modid: xfs-linux-melb:xfs-kern:28199a
Signed-off-by: NEric Sandeen <sandeen@sandeen.net>
Signed-off-by: NLachlan McIlroy <lachlan@sgi.com>
Signed-off-by: NTim Shimmin <tes@sgi.com>
      1c72bf90
  5. 10 2月, 2007 5 次提交
  7. 21 11月, 2006 1 次提交
  9. 28 9月, 2006 4 次提交
  11. 30 8月, 2006 1 次提交
  13. 20 6月, 2006 1 次提交
  15. 19 6月, 2006 1 次提交
  17. 09 6月, 2006 4 次提交
  19. 31 3月, 2006 1 次提交
  21. 29 3月, 2006 1 次提交
  23. 17 3月, 2006 1 次提交
    • M
      [XFS] There are a few problems with the new · 8867bc9b
      由 Mandy Kirkconnell 提交于 
      xfs_bmap_search_multi_extents() wrapper function that I introduced in mod
xfs-linux:xfs-kern:207393a. The function was added as a wrapper around
xfs_bmap_do_search_extents() to avoid breaking the top-of-tree CXFS
interface.  The idea of the function was basically to extract the target
extent buffer (if muli- level extent allocation mode), then call
xfs_bmap_do_search_extents() with either a pointer to the first extent in
the target buffer or a pointer to the first extent in the file, depending
on which extent mode was being used.  However, in addition to locating the
target extent record for block bno, xfs_bmap_do_search_extents() also sets
four parameters needed by the caller: *lastx, *eofp, *gotp, *prevp. 
Passing only the target extent buffer to xfs_bmap_do_search_extents()
causes *eofp to be set incorrectly if the extent is at the end of the
target list but there are actually more extents in the next er_extbuf.
Likewise, if the extent is the first one in the buffer but NOT the first
in the file, *prevp is incorrectly set to NULL.  Adding the needed
functionality to xfs_bmap_search_multi_extents() to re-set any incorrectly
set fields is redundant and makes the call to xfs_bmap_do_search_extents()
not make much sense when multi-level extent allocation mode is being used.
 This mod basically extracts the two functional components from
xfs_bmap_do_search_extents(), with the intent of obsoleting/removing
xfs_bmap_do_search_extents() after the CXFS mult-level in-core extent
changes are checked in.  The two components are:  1) The binary search to
locate the target extent record, and 2) Setting the four parameters needed
by the caller (*lastx, *eofp, *gotp, *prevp).  Component 1: I created a
new function in xfs_inode.c called xfs_iext_bno_to_ext(), which executes
the binary search to find the target extent record.
xfs_bmap_search_multi_extents() has been modified to call
xfs_iext_bno_to_ext() rather than xfs_bmap_do_search_extents().  Component
2: The parameter setting functionality has been added to
xfs_bmap_search_multi_extents(), eliminating the need for
xfs_bmap_do_search_extents().  These changes make the removal of
xfs_bmap_do_search_extents() trival once the CXFS changes are in place. 
They also allow us to maintain the current XFS interface, using the new
search function introduced in mod xfs-linux:xfs-kern:207393a.

SGI-PV: 928864
SGI-Modid: xfs-linux-melb:xfs-kern:207866a
Signed-off-by: NMandy Kirkconnell <alkirkco@sgi.com>
Signed-off-by: NNathan Scott <nathans@sgi.com>
      8867bc9b
  25. 14 3月, 2006 5 次提交
    • M
      [XFS] Fix assert to check that in-core extents are inline only. · f020b67f
      由 Mandy Kirkconnell 提交于 
      SGI-PV: 950678
SGI-Modid: xfs-linux-melb:xfs-kern:207634a
Signed-off-by: NMandy Kirkconnell <alkirkco@sgi.com>
Signed-off-by: NNathan Scott <nathans@sgi.com>
      f020b67f
    • N
      [XFS] Reduce stack usage within xfs_bmapi by rearranging some code, · a365bdd5
      由 Nathan Scott 提交于 
      splitting realtime/btree allocators apart.  Based on Glens original
patches.

SGI-PV: 947312
SGI-Modid: xfs-linux-melb:xfs-kern:25372a
Signed-off-by: NNathan Scott <nathans@sgi.com>
      a365bdd5
    • N
      [XFS] Reduce xfs_bmapi stack use by removing some local state variables, · 39269e29
      由 Nathan Scott 提交于 
      and directly testing flags instead.

SGI-PV: 947312
SGI-Modid: xfs-linux-melb:xfs-kern:25370a
Signed-off-by: NNathan Scott <nathans@sgi.com>
      39269e29
    • M
      [XFS] 929045 567344 This mod introduces multi-level in-core file extent · 0293ce3a
      由 Mandy Kirkconnell 提交于 
      functionality, building upon the new layout introduced in mod
xfs-linux:xfs-kern:207390a.  The new multi-level extent allocations are
only required for heavily fragmented files, so the old-style linear extent
list is used on files until the extents reach a pre-determined size of 4k.
4k buffers are used because this is the system page size on Linux i386 and
systems with larger page sizes don't seem to gain much, if anything, by
using their native page size as the extent buffer size. Also, using 4k
extent buffers everywhere provides a consistent interface for CXFS across
different platforms.  The 4k extent buffers are managed by an indirection
array (xfs_ext_irec_t) which is basically just a pointer array with a bit
of extra information to keep track of the number of extents in each buffer
as well as the extent offset of each buffer.  Major changes include:  -
Add multi-level in-core file extent functionality to the xfs_iext_  
subroutines introduced in mod:	xfs-linux:xfs-kern:207390a  - Introduce 13
new subroutines which add functionality for multi-level   in-core file
extents:	 xfs_iext_add_indirect_multi()	      
xfs_iext_remove_indirect()	   xfs_iext_realloc_indirect()	      
xfs_iext_indirect_to_direct()	      xfs_iext_bno_to_irec()	    
xfs_iext_idx_to_irec()	       xfs_iext_irec_init()	   
xfs_iext_irec_new()	    xfs_iext_irec_remove()	  
xfs_iext_irec_compact() 	xfs_iext_irec_compact_pages()	     
xfs_iext_irec_compact_full()	     xfs_iext_irec_update_extoffs()

SGI-PV: 928864
SGI-Modid: xfs-linux-melb:xfs-kern:207393a
Signed-off-by: NMandy Kirkconnell <alkirkco@sgi.com>
Signed-off-by: NNathan Scott <nathans@sgi.com>
      0293ce3a
    • M
      [XFS] 929045 567344 This mod re-organizes some of the in-core file extent · 4eea22f0
      由 Mandy Kirkconnell 提交于 
      code to prepare for an upcoming mod which will introduce multi-level
in-core extent allocations. Although the in-core extent management is
using a new code path in this mod, the functionality remains the same. 
Major changes include:	- Introduce 10 new subroutines which re-orgainze
the existing code but	do NOT change functionality:	    
xfs_iext_get_ext()	   xfs_iext_insert()	     xfs_iext_add()	  
 xfs_iext_remove()	   xfs_iext_remove_inline()	   
xfs_iext_remove_direct()	 xfs_iext_realloc_direct()	  
xfs_iext_direct_to_inline()	    xfs_iext_inline_to_direct()        
xfs_iext_destroy() - Remove 2 subroutines (functionality moved to new
subroutines above):	    xfs_iext_realloc() -replaced by xfs_iext_add()
and xfs_iext_remove()	      xfs_bmap_insert_exlist() - replaced by
xfs_iext_insert()	  xfs_bmap_delete_exlist() - replaced by
xfs_iext_remove() - Replace all hard-coded (indexed) extent assignments
with a call to	 xfs_iext_get_ext() - Replace all extent record pointer
arithmetic (ep++, ep--, base + lastx,..)   with calls to
xfs_iext_get_ext() - Update comments to remove the idea of a single
"extent list" and   introduce "extent record" terminology instead

SGI-PV: 928864
SGI-Modid: xfs-linux-melb:xfs-kern:207390a
Signed-off-by: NMandy Kirkconnell <alkirkco@sgi.com>
Signed-off-by: NNathan Scott <nathans@sgi.com>
      4eea22f0
  27. 12 1月, 2006 1 次提交
  29. 11 1月, 2006 3 次提交
  31. 02 11月, 2005 6 次提交