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319 Commits

Author SHA1 Message Date
Chris Mason
ecbe2402cb Btrfs: Keep fs_mutex during reads done by snapshot deletion 
There was an optimization to drop the fs_mutex when doing snapshot deletion
reads, but this can lead to false positives on checksumming errors.  Keep
the lock for now.

Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2008-09-25 11:04:01 -04:00
Chris Mason
593060d756 Btrfs: Implement raid0 when multiple devices are present 
Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2008-09-25 11:04:01 -04:00
Chris Mason
239b14b32d Btrfs: Bring back mount -o ssd optimizations 
Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2008-09-25 11:04:01 -04:00
Chris Mason
a9218f6b00 Add /dev/btrfs-control for device scanning ioctls 
Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2008-09-25 11:04:01 -04:00
Chris Mason
7d1660d411 Btrfs: Bring back find_free_extent CPU usage optimizations 
Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2008-09-25 11:04:01 -04:00
Chris Mason
6324fbf334 Btrfs: Dynamic chunk and block group allocation 
Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2008-09-25 11:04:01 -04:00
Chris Mason
0b86a832a1 Btrfs: Add support for multiple devices per filesystem 
Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2008-09-25 11:04:00 -04:00
Chris Mason
7f93bf8d27 Match the extent tree code to btrfs-progs for multi-device merging 
Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2008-09-25 11:04:00 -04:00
Chris Mason
952fccac50 Btrfs: Remove extent back refs in batches, and avoid duplicate searches 
Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2008-09-25 11:04:00 -04:00
Chris Mason
d7fc640e6f Btrfs: Allocator improvements 
Reduce CPU time searching for free blocks by optimizing find_first_extent_bit

Fix find_free_extent to make better use of the last_alloc hint.  Before it
was often finding blocks just before the hint.

Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2008-09-25 11:04:00 -04:00
Chris Mason
9afbb0b752 Btrfs: Disable tree defrag in SSD mode 
Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2008-09-25 11:04:00 -04:00
Chris Mason
5d196fc15d Btrfs: Use 2MB as the empty_size for clustered allocations 
Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2008-09-25 11:04:00 -04:00
Chris Mason
068fe39fa1 Btrfs: Add checks for last byte in disk to allocator grouping 
Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2008-09-25 11:04:00 -04:00
Chris Mason
f594706643 Btrfs: Add debugging for block group update failure 
Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2008-09-25 11:04:00 -04:00
Chris Mason
60cde612c8 Btrfs: Use last_alloc optimizations for metadata, even without -o ssd 
Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2008-09-25 11:04:00 -04:00
Chris Mason
21a4989d26 Btrfs: Hash in the offset and owner for file extent backref keys 
This makes searches for backrefs and backref insertion much more efficient
when there are many backrefs for a single extent

Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2008-09-25 11:04:00 -04:00
Chris Mason
47e4bb988c Btrfs: Insert extent record and the first backref in a single balance 
Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2008-09-25 11:04:00 -04:00
Chris Mason
4529ba495c Btrfs: Add data block hints to SSD mode too 
Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2008-09-25 11:04:00 -04:00
Chris Mason
291d673e6a Btrfs: Do delalloc accounting via hooks in the extent_state code 
Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2008-09-25 11:04:00 -04:00
Chris Mason
bea495e5b4 Btrfs: Tune readahead during defrag to avoid reading too much at once 
Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2008-09-25 11:03:59 -04:00
Chris Mason
d1310b2e0c Btrfs: Split the extent_map code into two parts 
There is now extent_map for mapping offsets in the file to disk and
extent_io for state tracking, IO submission and extent_bufers.

The new extent_map code shifts from [start,end] pairs to [start,len], and
pushes the locking out into the caller.  This allows a few performance
optimizations and is easier to use.

A number of extent_map usage bugs were fixed, mostly with failing
to remove extent_map entries when changing the file.

Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2008-09-25 11:03:59 -04:00
Chris Mason
e18e4809b1 Btrfs: Add mount -o ssd, which includes optimizations for seek free storage 
Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2008-09-25 11:03:59 -04:00
Chris Mason
55c69072d6 Btrfs: Fix extent_buffer usage when nodesize != leafsize 
Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2008-09-25 11:03:59 -04:00
Chris Mason
c31f8830f0 Btrfs: online shrinking fixes 
While shrinking the FS, the allocation functions need to make sure
they don't try to allocate bytes past the end of the FS.

nodatacow needed an extra check to force cows when the existing extents are
past the end of the FS.

Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2008-09-25 11:03:59 -04:00
Chris Mason
b0331a4c4c Btrfs: Disable btree reada during extent backref lookups. 
This reada is generally not effective.

Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2008-09-25 11:03:59 -04:00
Chris Mason
dc17ff8f11 Btrfs: Add data=ordered support 
This forces file data extents down the disk along with the metadata that
references them.  The current implementation is fairly simple, and just
writes out all of the dirty pages in an inode before the commit.

Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2008-09-25 11:03:59 -04:00
Chris Mason
725c8463ea Btrfs: resizer: don't hold the fs_mutex for long periods of time 
Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2008-09-25 11:03:59 -04:00
Chris Mason
1372f8e609 Properly call btrfs_search_slot while shrinking 
The shrinking code used btrfs_next_leaf to find the next item, but
this does not cow the blocks it touches.  This fix calls search_slot after
finding the next item to do appropriate cow and balancing.

Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2008-09-25 11:03:59 -04:00
Yan
73e48b277a Btrfs: Properly handle overlapping extent in shrink_extent_tree 
The patch fixes the overlapping extent issue in shrink_extent_tree.
It checks whether there is an overlapping extent by using
find_previous_extent. If there is an overlapping extent, it setups
key.objectid and cur_byte properly.

---

Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2008-09-25 11:03:58 -04:00
Yan
d548ee5182 Btrfs: Add a helper that finds previous extent item 
Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2008-09-25 11:03:58 -04:00
Chris Mason
bd09835d9a count_snapshots: Properly update the leaf pointer after btrfs_next_leaf 
Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2008-09-25 11:03:58 -04:00
Chris Mason
98ed51747b Btrfs: Force inlining off in a few places to save stack usage 
Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2008-09-25 11:03:58 -04:00
Chris Mason
f9ef6604ac Btrfs: 32 bit compile fixes for the resizer and enospc checks 
Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2008-09-25 11:03:58 -04:00
Chris Mason
4313b3994d Btrfs: Reduce stack usage in the resizer, fix 32 bit compiles 
Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2008-09-25 11:03:58 -04:00
Chris Mason
56b453c92f Btrfs: Explicitly send a root objectid to count_snapshots_in_path 
Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2008-09-25 11:03:58 -04:00
Chris Mason
8f662a76c6 Btrfs: Add readahead to the online shrinker, and a mount -o alloc_start= for testing 
Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2008-09-25 11:03:58 -04:00
Chris Mason
e52ec0eb62 Btrfs: Fix NULL block groups on reading the inode 
Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2008-09-25 11:03:58 -04:00
Chris Mason
edbd8d4efe Btrfs: Support for online FS resize (grow and shrink) 
Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2008-09-25 11:03:58 -04:00
Chris Mason
be20aa9dba Btrfs: Add mount option to turn off data cow 
A number of workloads do not require copy on write data or checksumming.
mount -o nodatasum to disable checksums and -o nodatacow to disable
both copy on write and checksumming.

In nodatacow mode, copy on write is still performed when a given extent
is under snapshot.

Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2008-09-25 11:03:58 -04:00
Chris Mason
f6dbff55d7 Btrfs: Reorder extent back refs to differentiate btree blocks from file data 
Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2008-09-25 11:03:58 -04:00
Chris Mason
6caab489c5 Fix btrfs_inc_ref to add backref hints 
Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2008-09-25 11:03:58 -04:00
Chris Mason
70b043f0c7 Btrfs: Extra NULL block group checks in find_free_extent 
Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2008-09-25 11:03:58 -04:00
Chris Mason
d8d5f3e16d Btrfs: Add lowest key information to back refs for extent tree blocks as well. 
Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2008-09-25 11:03:58 -04:00
Chris Mason
7bb86316c3 Btrfs: Add back pointers from extents to the btree or file referencing them 
Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2008-09-25 11:03:58 -04:00
Chris Mason
74493f7a59 Btrfs: Implement generation numbers in block pointers 
Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2008-09-25 11:03:58 -04:00
Chris Mason
1a2b2ac78a Btrfs: Fix extent allocation for btree blocks as the disk fills 
Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2008-09-25 11:03:58 -04:00
Chris Mason
87ee04eb0f Btrfs: Add simple stripe size parameter 
Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2008-09-25 11:03:58 -04:00
Chris Mason
00f5c795fc btrfs_drop_extents: make sure the item is getting smaller before truncate 
Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2008-09-25 11:03:58 -04:00
Chris Mason
015a739c7c Btrfs: Handle writeback under high memory pressure better 
Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2008-09-25 11:03:58 -04:00
Chris Mason
0e4de58432 Btrfs: Add check for null block group to find_search_start 
Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2008-09-25 11:03:58 -04:00