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379 commits

Author SHA1 Message Date
Chris Mason
04005cc7a1 Btrfs: Use blk_congestion_wait on older kernels 
Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2008-09-25 11:03:59 -04:00
Yan
fb4bc1e056 Btrfs: Fix compile on 2.6.22 kernel 
This patch fixes compile error on kernel-2.6.22

Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2008-09-25 11:03:59 -04:00
Yan
caaca38b8f Btrfs: Fix compile on kernel without ACLs enabled 
Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2008-09-25 11:03:59 -04:00
Chris Mason
4d5e74bc0a Btrfs: Fix data=ordered vs wait_on_inode deadlock on older kernels 
Using ilookup5 during data=ordered writeback could deadlock on I_LOCK.  This
saves a pointer to the inode instead.

Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2008-09-25 11:03:59 -04:00
Chris Mason
2da98f003f Btrfs: Run igrab on data=ordered inodes to prevent deadlocks during writeout 
Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2008-09-25 11:03:59 -04:00
Chris Mason
9cce6c3bfc Btrfs: Disable delalloc accounting for now 
Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2008-09-25 11:03:59 -04:00
Chris Mason
cee36a03e8 Rework btrfs_drop_inode to avoid scheduling 
Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2008-09-25 11:03:59 -04:00
Chris Mason
61295eb866 Btrfs: Add drop inode func to avoid data=ordered deadlock 
Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2008-09-25 11:03:59 -04:00
Chris Mason
8c416c9e0d Btrfs: Delete any remaining extent_maps before freeing the inode 
Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2008-09-25 11:03:59 -04:00
Chris Mason
b99aa6cb54 Btrfs: Only delete roots from sysfs when they were added to sysfs 
Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2008-09-25 11:03:59 -04:00
Chris Mason
69a32ac517 Btrfs: Change magic string to reflect new format 
Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2008-09-25 11:03:59 -04:00
Yan
fdebe2bd70 Btrfs: Add readonly inode flag 
This patch adds readonly inode flag support.  A file with this flag
can't be modified, but can be deleted.

Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2008-09-25 11:03:59 -04:00
Yan
744f52f997 Btrfs: Implement ACLs setting and getting 
ACLs are stored but not used for permission checks (yet)

Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2008-09-25 11:03:59 -04:00
Chris Mason
b3a0d8d28c Btrfs: Remove verbose WARN_ON 
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
21ad10cf3e Btrfs: Add flush barriers on commit 
Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2008-09-25 11:03:59 -04:00
Chris Mason
bcd987feef Btrfs: Remove extent_map debugging message 
Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2008-09-25 11:03:59 -04:00
Yan
b98b6767a0 Btrfs: Add inode flags support 
This patch adds NODATASUM & NODATACOW inode flags support.

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
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
3063d29f2a Btrfs: Move snapshot creation to commit time 
It is very difficult to create a consistent snapshot of the btree when
other writers may update the btree before the commit is done.

This changes the snapshot creation to happen during the commit, while
no other updates are possible.

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
e4204dedbb Btrfs: Change tree block csum tagging to avoid false error messages 
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
Chris Mason
2552488345 Btrfs: Lower the max inline size to 8k 
Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2008-09-25 11:03:59 -04:00
Chris Mason
d666746207 Btrfs: Change st_blocksize to 4k 
Some programs (python) do rwm cycles at the granularity returned by
stat.

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
5b92ee7204 Btrfs: Fix lock ordering of the snapshot semaphore against the page lock 
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
5d4fb734b4 Btrfs: Fix an off by one in the extent_map prepare write code 
Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2008-09-25 11:03:58 -04:00
Chris Mason
1832a6d5ee Btrfs: Implement basic support for -ENOSPC 
This is intended to prevent accidentally filling the drive.  A determined
user can still make things oops.

It includes some accounting of the current bytes under delayed allocation,
but this will change as things get optimized

Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2008-09-25 11:03:58 -04:00
Chris Mason
01f4665805 Btrfs: Less aggressive readahead on deletes 
Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2008-09-25 11:03:58 -04:00
Chris Mason
879c1cfc31 Btrfs: Fix nodatacow extent lookup 
Yan Zheng noticed the offset into the extent was incorrectly being added to the
extent start before trying to find it in the extent allocation tree.

Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2008-09-25 11:03:58 -04:00
Chris Mason
190662b212 Btrfs: Fix delayed allocation to avoid missing delalloc extents 
find_lock_delalloc_range could exit out too early

Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2008-09-25 11:03:58 -04:00
Chris Mason
4aec2b5232 kmalloc a few large stack objects in the btrfs_ioctl path 
Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2008-09-25 11:03:58 -04:00
Chris Mason
6da6abae02 Btrfs: Back port to 2.6.18-el kernels 
Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2008-09-25 11:03:58 -04:00
Chris Mason
c59f8951d4 Btrfs: Add mount option to enforce a max extent size 
Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2008-09-25 11:03:58 -04:00
Chris Mason
d10c5f31c7 Btrfs: Fix extent_map and extent_state leaks by flushing lrus on FS unmount 
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
b6cda9bcb4 Btrfs: Add mount -o nodatasum to turn of file data checksumming 
Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2008-09-25 11:03:58 -04:00