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145 commits

Author SHA1 Message Date
Chris Mason
1259ab75c6 Btrfs: Handle write errors on raid1 and raid10 
When duplicate copies exist, writes are allowed to fail to one of those
copies.  This changeset includes a few changes that allow the FS to
continue even when some IOs fail.

It also adds verification of the parent generation number for btree blocks.
This generation is stored in the pointer to a block, and it ensures
that missed writes to are detected.

Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2008-09-25 11:04:03 -04:00
Chris Mason
ca7a79ad8d Btrfs: Pass down the expected generation number when reading tree blocks 
Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2008-09-25 11:04:03 -04:00
Chris Mason
44b8bd7edd Btrfs: Create a work queue for bio writes 
This allows checksumming to happen in parallel among many cpus, and
keeps us from bogging down pdflush with the checksumming code.

Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2008-09-25 11:04:01 -04:00
Chris Mason
f29844623d Btrfs: Write out all super blocks on commit, and bring back proper barrier support 
Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2008-09-25 11:04:01 -04:00
Chris Mason
22c599485b Btrfs: Handle data block end_io through the async work queue 
Before it was done by the bio end_io routine, the work queue code is able
to scale much better with faster IO subsystems.

Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2008-09-25 11:04:01 -04:00
Chris Mason
0999df54f8 Btrfs: Verify checksums on tree blocks found without read_tree_block 
Checksums were only verified by btrfs_read_tree_block, which meant the
functions to probe the page cache for blocks were not validating checksums.
Normally this is fine because the buffers will only be in cache if they
have already been validated.

But, there is a window while the buffer is being read from disk where
it could be up to date in the cache but not yet verified.  This patch
makes sure all buffers go through checksum verification before they
are used.

This is safer, and it prevents modification of buffers before they go
through the csum code.

Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2008-09-25 11:04:01 -04:00
Chris Mason
8a4b83cc8b Btrfs: Add support for device scanning and detection ioctls 
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
e2008b6140 Btrfs: Add some simple throttling to wait for data=ordered and snapshot deletion 
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
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
ff79f8190b Btrfs: Add back file data checksumming 
Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2008-09-25 11:03:57 -04:00
Chris Mason
6b80053d02 Btrfs: Add back the online defragging code 
Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2008-09-25 11:03:56 -04:00
Chris Mason
db94535db7 Btrfs: Allow tree blocks larger than the page size 
Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2008-09-25 11:03:56 -04:00
Chris Mason
5f39d397df Btrfs: Create extent_buffer interface for large blocksizes 
Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2008-09-25 11:03:56 -04:00
Chris Mason
d3c2fdcf7b Btrfs: Use balance_dirty_pages_nr on btree blocks 
btrfs_btree_balance_dirty is changed to pass the number of pages dirtied
for more accurate dirty throttling.  This lets the VM make better decisions
about when to force some writeback.

Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2008-09-25 11:00:48 -04:00
Chris Mason
86479a04ee Add support for defragging files via btrfsctl -d. Avoid OOM on extent tree 
defrag.

Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2007-09-10 19:58:16 -04:00
Josef Bacik
58176a9604 Btrfs: Add per-root block accounting and sysfs entries 
Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2007-08-29 15:47:34 -04:00
Chris Mason
a52d9a8033 Btrfs: Extent based page cache code. This uses an rbtree of extents and tests 
instead of buffer heads.

Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2007-08-27 16:49:44 -04:00
Chris Mason
f2183bde1a Btrfs: Add BH_Defrag to mark buffers that are in need of defragging 
This allows the tree walking code to defrag only the newly allocated
buffers, it seems to be a good balance between perfect defragging and the
performance hit of repeatedly reallocating blocks.

Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2007-08-10 14:42:37 -04:00
Chris Mason
ccd467d60e Btrfs: crash recovery fixes 
Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2007-06-28 15:57:36 -04:00
Chris Mason
5eda7b5e9b Btrfs: Add the ability to find and remove dead roots after a crash. 
Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2007-06-22 14:16:25 -04:00
Chris Mason
6cbd557078 Btrfs: add GPLv2 
Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2007-06-12 09:07:21 -04:00
Chris Mason
35b7e47610 Btrfs: fix page cache memory leak 
Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2007-05-02 15:53:43 -04:00
Chris Mason
090d18753c Btrfs: directory readahead 
Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2007-05-01 08:53:32 -04:00
Chris Mason
b4100d6424 Btrfs: add a device id to device items 
Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2007-04-12 12:14:00 -04:00
Chris Mason
8352d8a473 Btrfs: add disk ioctl, mostly working 
Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2007-04-12 10:43:05 -04:00
Chris Mason
7eccb903a8 Btrfs: create a logical->phsyical block number mapping scheme 
Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2007-04-11 15:53:25 -04:00
Chris Mason
0f7d52f443 Btrfs: groundwork for subvolume and snapshot roots 
Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2007-04-09 10:42:37 -04:00
Chris Mason
2c90e5d658 Btrfs: still corruption hunting 
Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2007-04-02 10:50:19 -04:00
Chris Mason
f254e52c1c Btrfs: verify csums on read 
Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2007-03-29 15:15:27 -04:00
Chris Mason
d98237b3ed Btrfs: use a btree inode instead of sb_getblk 
Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2007-03-28 13:57:48 -04:00
Chris Mason
79154b1b5b Btrfs: transaction rework 
Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2007-03-22 15:59:16 -04:00
Chris Mason
e20d96d64f Mountable btrfs, with readdir 
Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2007-03-22 12:13:20 -04:00
Chris Mason
2e635a2783 Btrfs: initial move to kernel module land 
Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2007-03-21 11:12:56 -04:00
Chris Mason
e089f05c18 Btrfs: transaction handles everywhere 
Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2007-03-16 16:20:31 -04:00
Chris Mason
123abc88c9 Btrfs: variable block size support 
Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2007-03-14 14:14:43 -04:00
Chris Mason
3768f3689f Btrfs: Change the super to point to a tree of trees to enable persistent snapshots 
Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2007-03-13 16:47:54 -04:00
Chris Mason
234b63a091 rename funcs and structs to btrfs 
Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2007-03-13 10:46:10 -04:00
Chris Mason
a28ec19775 Btrfs: Fixup reference counting on cows 
Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2007-03-06 20:08:01 -05:00
Chris Mason
ed2ff2cba7 Btrfs: pretend page cache & commit code 
Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2007-03-01 18:59:40 -05:00
Chris Mason
9a8dd1502d Btrfs: Block sized tree extents and extent deletion 
Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2007-02-23 08:38:36 -05:00
Chris Mason
cfaa72952f Btrfs: extent fixes 
Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2007-02-21 17:04:57 -05:00
Chris Mason
d97e63b69e Btrfs: early extent mapping support 
Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2007-02-20 16:40:44 -05:00
Chris Mason
eb60ceac0e Btrfs: Add backing store, memory management 
Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2007-02-02 09:18:22 -05:00