Commit Graph

58 Commits

Author SHA1 Message Date
Eric Sandeen 3a59c94c4b [XFS] Clean up function name handling in tracing code
Remove the hardcoded "fnames" for tracing, and just embed them in tracing
macros via __FUNCTION__. Kills a lot of #ifdefs too.

SGI-PV: 967353
SGI-Modid: xfs-linux-melb:xfs-kern:29099a

Signed-off-by: Eric Sandeen <sandeen@sandeen.net>
Signed-off-by: David Chinner <dgc@sgi.com>
Signed-off-by: Tim Shimmin <tes@sgi.com>
2007-07-14 15:41:24 +10:00
David Chinner b11f94d537 [XFS] Quota inode has no parent.
Avoid using a special "zero inode" as the parent of the quota inode as
this can confuse the filestreams code into thinking the quota inode has a
parent. We do not want the quota inode to follow filestreams allocation
rules, so pass a NULL as the parent inode and detect this condition when
doing stream associations.

SGI-PV: 964469
SGI-Modid: xfs-linux-melb:xfs-kern:29098a

Signed-off-by: David Chinner <dgc@sgi.com>
Signed-off-by: Tim Shimmin <tes@sgi.com>
2007-07-14 15:41:12 +10:00
David Chinner 2a82b8be8a [XFS] Concurrent Multi-File Data Streams
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: David Chinner <dgc@sgi.com>
Signed-off-by: Barry Naujok <bnaujok@sgi.com>
Signed-off-by: Donald Douwsma <donaldd@sgi.com>
Signed-off-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Tim Shimmin <tes@sgi.com>
Signed-off-by: Vlad Apostolov <vapo@sgi.com>
2007-07-14 15:40:53 +10:00
Vignesh Babu 16a087d8e1 [XFS] Use is_power_of_2 instead of open coding checks
SGI-PV: 966576
SGI-Modid: xfs-linux-melb:xfs-kern:28950a

Signed-off-by: Vignesh Babu <vignesh.babu@wipro.com>
Signed-off-by: David Chinner <dgc@sgi.com>
Signed-off-by: Tim Shimmin <tes@sgi.com>
2007-07-14 15:37:12 +10:00
Lachlan McIlroy ba87ea699e [XFS] Fix to prevent the notorious 'NULL files' problem after a crash.
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: Lachlan McIlroy <lachlan@sgi.com>
Signed-off-by: David Chinner <dgc@sgi.com>
Signed-off-by: Tim Shimmin <tes@sgi.com>
2007-05-08 13:49:46 +10:00
Lachlan McIlroy d3cf209476 [XFS] propogate return codes from flush routines
This patch handles error return values in fs_flush_pages and
fs_flushinval_pages. It changes the prototype of fs_flushinval_pages so we
can propogate the errors and handle them at higher layers. I also modified
xfs_itruncate_start so that it could propogate the error further.

SGI-PV: 961990
SGI-Modid: xfs-linux-melb:xfs-kern:28231a

Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>
Signed-off-by: Stewart Smith <stewart@flamingspork.com>
Signed-off-by: Tim Shimmin <tes@sgi.com>
2007-05-08 13:49:27 +10:00
Eric Sandeen 1c72bf9003 [XFS] The last argument "lsn" of xfs_trans_commit() is always called with
NULL.

Patch provided by Eric Sandeen.

SGI-PV: 961693
SGI-Modid: xfs-linux-melb:xfs-kern:28199a

Signed-off-by: Eric Sandeen <sandeen@sandeen.net>
Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>
Signed-off-by: Tim Shimmin <tes@sgi.com>
2007-05-08 13:48:42 +10:00
Eric Sandeen 7bc5306d74 [XFS] Remove unused header files for MAC and CAP checking functionality.
xfs_mac.h and xfs_cap.h provide definitions and macros that aren't used
anywhere in XFS at all. They are left-overs from "to be implement at some
point in the future" functionality that Irix XFS has. If this
functionality ever goes into Linux, it will be provided at a different
layer, most likely through the security hooks in the kernel so we will
never need this functionality in XFS.

Patch provided by Eric Sandeen (sandeen@sandeen.net).

SGI-PV: 960895
SGI-Modid: xfs-linux-melb:xfs-kern:28036a

Signed-off-by: Eric Sandeen <sandeen@sandeen.net>
Signed-off-by: David Chinner <dgc@sgi.com>
Signed-off-by: Tim Shimmin <tes@sgi.com>
2007-02-10 18:37:28 +11:00
Eric Sandeen f7c99b6fc7 [XFS] Remove unused argument to xfs_bmap_finish
The firstblock argument to xfs_bmap_finish is not used by that function.
Remove it and cleanup the code a bit.

Patch provided by Eric Sandeen.

SGI-PV: 960196
SGI-Modid: xfs-linux-melb:xfs-kern:28034a

Signed-off-by: Eric Sandeen <sandeen@sandeen.net>
Signed-off-by: David Chinner <dgc@sgi.com>
Signed-off-by: Tim Shimmin <tes@sgi.com>
2007-02-10 18:37:16 +11:00
Lachlan McIlroy 6816016137 [XFS] Fix callers of xfs_iozero() to zero the correct range.
The problem is the two callers of xfs_iozero() are rounding out the range
to be zeroed to the end of a fsb and in some cases this extends past the
new eof. The call to commit_write() in xfs_iozero() will cause the Linux
inode's file size to be set too high.

SGI-PV: 960788
SGI-Modid: xfs-linux-melb:xfs-kern:28013a

Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>
Signed-off-by: David Chinner <dgc@sgi.com>
Signed-off-by: Tim Shimmin <tes@sgi.com>
2007-02-10 18:36:47 +11:00
David Chinner f74eaf59b3 [XFS] Fix inode log item use-after-free on forced shutdown
SGI-PV: 959388
SGI-Modid: xfs-linux-melb:xfs-kern:27805a

Signed-off-by: David Chinner <dgc@sgi.com>
Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>
Signed-off-by: Tim Shimmin <tes@sgi.com>
2007-02-10 18:36:04 +11:00
David Chinner 7989cb8ef5 [XFS] Keep stack usage down for 4k stacks by using noinline.
gcc-4.1 and more recent aggressively inline static functions which
increases XFS stack usage by ~15% in critical paths. Prevent this from
occurring by adding noinline to the STATIC definition.

Also uninline some functions that are too large to be inlined and were
causing problems with CONFIG_FORCED_INLINING=y.

Finally, clean up all the different users of inline, __inline and
__inline__ and put them under one STATIC_INLINE macro. For debug kernels
the STATIC_INLINE macro uninlines those functions.

SGI-PV: 957159
SGI-Modid: xfs-linux-melb:xfs-kern:27585a

Signed-off-by: David Chinner <dgc@sgi.com>
Signed-off-by: David Chatterton <chatz@sgi.com>
Signed-off-by: Tim Shimmin <tes@sgi.com>
2007-02-10 18:34:56 +11:00
David Chinner e5ffd2bb62 [XFS] Stale the correct inode when freeing clusters.
SGI-PV: 958376
SGI-Modid: xfs-linux-melb:xfs-kern:27503a

Signed-off-by: David Chinner <dgc@sgi.com>
Signed-off-by: Tim Shimmin <tes@sgi.com>
2006-11-21 18:55:33 +11:00
David Chinner 4c60658e0f [XFS] Prevent a deadlock when xfslogd unpins inodes.
The previous fixes for the use after free in xfs_iunpin left a nasty log
deadlock when xfslogd unpinned the inode and dropped the last reference to
the inode. the ->clear_inode() method can issue transactions, and if the
log was full, the transaction could push on the log and get stuck trying
to push the inode it was currently unpinning.

To fix this, we provide xfs_iunpin a guarantee that it will always have a
valid xfs_inode <-> linux inode link or a particular flag will be set on
the inode. We then use log forces during lookup to ensure transactions are
completed before we recycle the inode. This ensures that xfs_iunpin will
never use the linux inode after it is being freed, and any lookup on an
inode on the reclaim list will wait until it is safe to attach a new linux
inode to the xfs inode.

SGI-PV: 956832
SGI-Modid: xfs-linux-melb:xfs-kern:27359a

Signed-off-by: David Chinner <dgc@sgi.com>
Signed-off-by: Shailendra Tripathi <stripathi@agami.com>
Signed-off-by: Takenori Nagano <t-nagano@ah.jp.nec.com>
Signed-off-by: Tim Shimmin <tes@sgi.com>
2006-11-11 18:05:00 +11:00
David Chinner 7a18c38607 [XFS] Clean up i_flags and i_flags_lock handling.
SGI-PV: 956832
SGI-Modid: xfs-linux-melb:xfs-kern:27358a

Signed-off-by: David Chinner <dgc@sgi.com>
Signed-off-by: Nathan Scott <nscott@aconex.com>
Signed-off-by: Tim Shimmin <tes@sgi.com>
2006-11-11 18:04:54 +11:00
David Chinner f273ab848b [XFS] Really fix use after free in xfs_iunpin.
The previous attempts to fix the linux inode use-after-free in xfs_iunpin
simply made the problem harder to hit. We actually need complete exclusion
between xfs_reclaim and xfs_iunpin, as well as ensuring that the i_flags
are consistent during both of these functions. Introduce a new spinlock
for exclusion and the i_flags, and fix up xfs_iunpin to use igrab before
marking the inode dirty.

SGI-PV: 952967
SGI-Modid: xfs-linux-melb:xfs-kern:26964a

Signed-off-by: David Chinner <dgc@sgi.com>
Signed-off-by: Tim Shimmin <tes@sgi.com>
2006-09-28 11:06:03 +10:00
Nathan Scott 745b1f47fc [XFS] Remove last bulkstat false-positives with debug kernels.
SGI-PV: 953819
SGI-Modid: xfs-linux-melb:xfs-kern:26628a

Signed-off-by: Nathan Scott <nathans@sgi.com>
Signed-off-by: Tim Shimmin <tes@sgi.com>
2006-09-28 11:02:23 +10:00
Nathan Scott 41ff715abc [XFS] Ensure bulkstat from an invalid inode number gets caught always with
EINVAL.

SGI-PV: 953819
SGI-Modid: xfs-linux-melb:xfs-kern:26629a

Signed-off-by: Nathan Scott <nathans@sgi.com>
2006-07-28 17:05:51 +10:00
Nathan Scott 6fdf8ccc09 [XFS] Rework code snippets slightly to remove remaining recent-gcc
warnings.

SGI-PV: 904196
SGI-Modid: xfs-linux-melb:xfs-kern:26364a

Signed-off-by: Nathan Scott <nathans@sgi.com>
2006-06-28 10:13:52 +10:00
Nathan Scott f6c2d1fa63 [XFS] Remove version 1 directory code. Never functioned on Linux, just
pure bloat.

SGI-PV: 952969
SGI-Modid: xfs-linux-melb:xfs-kern:26251a

Signed-off-by: Nathan Scott <nathans@sgi.com>
2006-06-20 13:04:51 +10:00
Al Viro 0d8fee3270 [XFS] Kill direct access to ->count in valusema(); all we ever use it for
is check if semaphore is actually locked, which can be trivially done in
portable way. Code gets more reabable, while we are at it... 

SGI-PV: 953915
SGI-Modid: xfs-linux-melb:xfs-kern:26274a

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Nathan Scott <nathans@sgi.com>
2006-06-19 08:41:30 +10:00
Nathan Scott 4d1a2ed3d8 [XFS] Fix up debug code so that bulkstat wont generate thousands of
fsstress warnings.

SGI-PV: 904196
SGI-Modid: xfs-linux-melb:xfs-kern:26111a

Signed-off-by: Nathan Scott <nathans@sgi.com>
2006-06-09 17:12:28 +10:00
Nathan Scott a916e2bd15 [XFS] Remove unused parameter from di2xflags routine.
SGI-PV: 904192
SGI-Modid: xfs-linux-melb:xfs-kern:26110a

Signed-off-by: Nathan Scott <nathans@sgi.com>
2006-06-09 17:12:17 +10:00
Nathan Scott 67fcaa73ad [XFS] Resolve a namespace collision on vnode/vnodeops for FreeBSD porters.
SGI-PV: 953338
SGI-Modid: xfs-linux-melb:xfs-kern:26107a

Signed-off-by: Nathan Scott <nathans@sgi.com>
2006-06-09 17:00:52 +10:00
Nathan Scott b83bd13881 [XFS] Resolve a namespace collision on vfs/vfsops for FreeBSD porters.
SGI-PV: 9533338
SGI-Modid: xfs-linux-melb:xfs-kern:26106a

Signed-off-by: Nathan Scott <nathans@sgi.com>
2006-06-09 16:48:30 +10:00
Nathan Scott b65745205f [XFS] Portability changes: remove prdev, stick to one diagnostic
interface.

SGI-PV: 953338
SGI-Modid: xfs-linux-melb:xfs-kern:26103a

Signed-off-by: Nathan Scott <nathans@sgi.com>
2006-06-09 15:29:40 +10:00
Nathan Scott 7d04a335b6 [XFS] Shutdown the filesystem if all device paths have gone. Made
shutdown vop flags consistent with sync vop flags declarations too.

SGI-PV: 939911
SGI-Modid: xfs-linux-melb:xfs-kern:26096a

Signed-off-by: Nathan Scott <nathans@sgi.com>
2006-06-09 14:58:38 +10:00
David Chinner 714250879e [XFS] Stop a BUG from occurring in generic_delete_inode by preventing
transaction completion from marking the inode dirty while it is being
cleaned up on it's way out of the system.

SGI-PV: 952967
SGI-Modid: xfs-linux-melb:xfs-kern:26040a

Signed-off-by: David Chinner <dgc@sgi.com>
Signed-off-by: Nathan Scott <nathans@sgi.com>
2006-06-09 14:55:52 +10:00
Barry Naujok d3446eac3f [XFS] Add degframentation exclusion support
SGI-PV: 953061
SGI-Modid: xfs-linux-melb:xfs-kern:25986a

Signed-off-by: Barry Naujok <bnaujok@sgi.com>
Signed-off-by: Nathan Scott <nathans@sgi.com>
2006-06-09 14:54:19 +10:00
Mandy Kirkconnell fe6c1e7240 [XFS] Fix size argument in kmem_free().
SGI-PV: 952291
SGI-Modid: xfs-linux-melb:xfs-kern:209807a

Signed-off-by: Mandy Kirkconnell <alkirkco@sgi.com>
Signed-off-by: Nathan Scott <nathans@sgi.com>
2006-06-09 14:51:25 +10:00
Olaf Weber 3e57ecf640 [XFS] Add parameters to xfs_bmapi() and xfs_bunmapi() to have them report
the range spanned by modifications to the in-core extent map.  Add
XFS_BUNMAPI() and XFS_SWAP_EXTENTS() macros that call xfs_bunmapi() and
xfs_swap_extents() via the ioops vector. Change all calls that may modify
the in-core extent map for the data fork to go through the ioops vector. 
This allows a cache of extent map data to be kept in sync.

SGI-PV: 947615
SGI-Modid: xfs-linux-melb:xfs-kern:209226a

Signed-off-by: Olaf Weber <olaf@sgi.com>
Signed-off-by: Nathan Scott <nathans@sgi.com>
2006-06-09 14:48:12 +10:00
David Chinner 58829e490e [XFS] Fix an inode use-after-free durin an unpin. When reclaiming inodes
that have been unlinked, we may need to execute transactions during
reclaim. By the time the transaction has hit the disk, the linux inode and
xfs vnode may already have been freed so we can't reference them safely.
Use the known xfs inode state to determine if it is safe to reference the
vnode and linux inode during the unpin operation.

SGI-PV: 946321
SGI-Modid: xfs-linux-melb:xfs-kern:25687a

Signed-off-by: David Chinner <dgc@sgi.com>
Signed-off-by: Nathan Scott <nathans@sgi.com>
2006-04-11 15:11:20 +10:00
Nathan Scott c41564b5af [XFS] We really suck at spulling. Thanks to Chris Pascoe for fixing all
these typos.

SGI-PV: 904196
SGI-Modid: xfs-linux-melb:xfs-kern:25539a

Signed-off-by: Nathan Scott <nathans@sgi.com>
2006-03-29 08:55:14 +10:00
David Chinner 38e2299a64 [XFS] Explain the race closed by the addition of vn_iowait() to the start
of xfs_itruncate_start().

SGI-PV: 947420
SGI-Modid: xfs-linux-melb:xfs-kern:25527a

Signed-off-by: David Chinner <dgc@sgi.com>
Signed-off-by: Nathan Scott <nathans@sgi.com>
2006-03-22 12:47:15 +11:00
Yingping Lu 9fa8046f50 [XFS] Fixing the error caused by the conflict between DIO Write's
conversion and concurrent truncate operations. Use vn_iowait to wait for
the completion of any pending DIOs. Since the truncate requires exclusive
IOLOCK, so this blocks any further DIO operations since DIO write also
needs exclusive IOBLOCK. This serves as a barrier and prevent any
potential starvation.

SGI-PV: 947420
SGI-Modid: xfs-linux-melb:xfs-kern:208088a

Signed-off-by: Yingping Lu <yingping@sgi.com>
Signed-off-by: Nathan Scott <nathans@sgi.com>
2006-03-22 12:44:35 +11:00
Yingping Lu f1fdc848aa [XFS] Fixing KDB's xrwtrc command, also added the current process id into
the trace.

SGI-PV: 948300
SGI-Modid: xfs-linux-melb:xfs-kern:208069a

Signed-off-by: Yingping Lu <yingping@sgi.com>
Signed-off-by: Nathan Scott <nathans@sgi.com>
2006-03-22 12:44:15 +11:00
Nathan Scott 3b244aa81e [XFS] endianess annotations for xfs_attr_shortform_t
SGI-PV: 943272
SGI-Modid: xfs-linux-melb:xfs-kern:25501a

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nathan Scott <nathans@sgi.com>
2006-03-17 17:29:25 +11:00
Nathan Scott b12dd34298 [XFS] Fix an infinite loop issue in bulkstat when a corrupt inode is
detected.  Thanks to Roger Willcocks.

SGI-PV: 951054
SGI-Modid: xfs-linux-melb:xfs-kern:25477a

Signed-off-by: Nathan Scott <nathans@sgi.com>
2006-03-17 17:26:04 +11:00
Nathan Scott ec86dc02fd [XFS] Complete transition away from linvfs naming convention, finally.
SGI-PV: 947038
SGI-Modid: xfs-linux-melb:xfs-kern:25474a

Signed-off-by: Nathan Scott <nathans@sgi.com>
2006-03-17 17:25:36 +11:00
Mandy Kirkconnell 8867bc9bf0 [XFS] There are a few problems with the new
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: Mandy Kirkconnell <alkirkco@sgi.com>
Signed-off-by: Nathan Scott <nathans@sgi.com>
2006-03-17 17:25:04 +11:00
Mandy Kirkconnell 0293ce3a9f [XFS] 929045 567344 This mod introduces multi-level in-core file extent
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: Mandy Kirkconnell <alkirkco@sgi.com>
Signed-off-by: Nathan Scott <nathans@sgi.com>
2006-03-14 13:30:23 +11:00
Mandy Kirkconnell 4eea22f01b [XFS] 929045 567344 This mod re-organizes some of the in-core file extent
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: Mandy Kirkconnell <alkirkco@sgi.com>
Signed-off-by: Nathan Scott <nathans@sgi.com>
2006-03-14 13:29:52 +11:00
Nathan Scott 3762ec6bf7 [XFS] Merge in trivial changes, sync up headers with userspace
equivalents.

SGI-PV: 907752
SGI-Modid: xfs-linux-melb:xfs-kern:24961a

Signed-off-by: Nathan Scott <nathans@sgi.com>
2006-01-12 10:29:53 +11:00
Christoph Hellwig 42fe2b1f7f [XFS] fix, speedup and simplify atime handling let the VFS handle atime
updates and only sync back to the xfs inode when nessecary

SGI-PV: 946679
SGI-Modid: xfs-linux-melb:xfs-kern:203362a

Signed-off-by: Christoph Hellwig <hch@sgi.com>
Signed-off-by: Nathan Scott <nathans@sgi.com>
2006-01-11 15:35:17 +11:00
Eric Sandeen 24ee80882d [XFS] remove unused vars, args, & unneeded intermediate vars from zeroing
code

SGI-PV: 946641
SGI-Modid: xfs-linux-melb:xfs-kern:203328a

Signed-off-by: Eric Sandeen <sandeen@sgi.com>
Signed-off-by: Nathan Scott <nathans@sgi.com>
2006-01-11 15:34:32 +11:00
Nathan Scott dd9f438e32 [XFS] Implement the di_extsize allocator hint for non-realtime files as
well.  Also provides a mechanism for inheriting this property from the
parent directory for new files.

SGI-PV: 945264
SGI-Modid: xfs-linux-melb:xfs-kern:24367a

Signed-off-by: Nathan Scott <nathans@sgi.com>
2006-01-11 15:28:28 +11:00
Christoph Hellwig 16259e7d95 [XFS] Endianess annotations for various allocator data structures
SGI-PV: 943272
SGI-Modid: xfs-linux:xfs-kern:201006a

Signed-off-by: Christoph Hellwig <hch@sgi.com>
Signed-off-by: Nathan Scott <nathans@sgi.com>
2005-11-02 15:11:25 +11:00
Nathan Scott 7b71876980 [XFS] Update license/copyright notices to match the prefered SGI
boilerplate.

SGI-PV: 913862
SGI-Modid: xfs-linux:xfs-kern:23903a

Signed-off-by: Nathan Scott <nathans@sgi.com>
2005-11-02 14:58:39 +11:00
Nathan Scott a844f4510d [XFS] Remove xfs_macros.c, xfs_macros.h, rework headers a whole lot.
SGI-PV: 943122
SGI-Modid: xfs-linux:xfs-kern:23901a

Signed-off-by: Nathan Scott <nathans@sgi.com>
2005-11-02 14:38:42 +11:00
Nathan Scott 4aeb664c25 [XFS] Improve buffered read throughput by removing unnecessary timer calls
that showed in ´kernel profiles.

SGI-PV: 925163
SGI-Modid: xfs-linux:xfs-kern:23861a

Signed-off-by: Nathan Scott <nathans@sgi.com>
2005-11-02 11:43:58 +11:00