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2008-09-25Btrfs: Add mount option to turn off data cowChris Mason5-25/+293
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>
2008-09-25Btrfs: Add mount -o nodatasum to turn of file data checksummingChris Mason4-9/+34
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Fixes for loopback files in btrfsChris Mason2-2/+14
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Off by one fix for btrfs_drop_extentsYan1-1/+2
One of my old patches introduces a new bug to btrfs_drop_extents(changeset 275). Inline extents are not truncated properly when "extent_end == end", it can trigger the BUG_ON at file.c:600. I hope I don't introduce new bug this time. --- Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Reorder extent back refs to differentiate btree blocks from file dataChris Mason2-10/+10
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Fix btrfs_inc_ref to add backref hintsChris Mason1-2/+4
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Fix typo in .. check (thanks Yan)Chris Mason1-1/+1
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Add backrefs for symbolic link inodesChris Mason1-17/+13
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Extra NULL block group checks in find_free_extentChris Mason1-0/+6
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Add back pointers from the inode to the directory that references itChris Mason3-143/+272
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Add lowest key information to back refs for extent tree blocks as well.Chris Mason4-19/+110
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Add back pointers from extents to the btree or file referencing themChris Mason8-105/+577
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Implement generation numbers in block pointersChris Mason3-8/+115
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: section mismatch warningsChristian Hesse3-3/+3
--Boundary-00=_CcOWHFYK4T+JwSj Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Hello everybody, compiling btrfs into the kernel results in section mismatch warnings. __exit functions are called where they are not allowed to. The attached patch fixes this for me. Not sure if it is correct though. Signed-off-by: Christian Hesse <mail@earthworm.de> -- Regards, Chris --Boundary-00=_CcOWHFYK4T+JwSj Content-Type: text/x-diff; charset="iso-8859-1"; name="btrfs-section_mismatches.patch" Content-Transfer-Encoding: 7bit Content-Disposition: attachment; filename="btrfs-section_mismatches.patch" Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Fix buffer get/release issue in create_snapshotYan1-2/+2
btrfs_cow_block expects a reference to be held on the buffer being cow'd. Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Fix extent allocation for btree blocks as the disk fillsChris Mason1-11/+17
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Add simple stripe size parameterChris Mason3-13/+43
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25btrfs_drop_extents: make sure the item is getting smaller before truncateChris Mason3-16/+24
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Add efficient dirty accounting to the extent_map treeChris Mason3-4/+36
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Fine tune the btree writeback exclusion some moreChris Mason2-1/+6
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Only limit btree writeback for pdflushChris Mason1-1/+1
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Limit btree writeback to prevent seeksChris Mason3-0/+51
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Handle writeback under high memory pressure betterChris Mason2-1/+13
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Properly update right_nritems in push_leaf_leftYan1-3/+2
The codes that fixup the right leaf and the codes that dirty the extnet buffer use the variable 'right_nritems' , both of them expect 'right_nritems' is the number of items in right leaf after the push. Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Add check for null block group to find_search_startChris Mason1-0/+3
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Make sure page mapping dirty tag is properly clearedChris Mason1-2/+20
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Avoid fragmentation from parallel delalloc fillingChris Mason1-34/+49
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Return value checking in module initWyatt Banks3-6/+33
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: xattr fixesJosef Bacik1-2/+2
This fixes two typos that Yan pointed out to me. Thanks much, Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Make ACLs return EOPNOTSUPP for nowJosef Bacik2-2/+20
There was a slight problem with ACL's returning EINVAL when you tried to set an ACL. This isn't correct, we should be returning EOPNOTSUPP, so I did a very ugly thing and just commented everybody out and made them return EOPNOTSUPP. This is only temporary, I'm going back to implement ACL's, but Chris wants to push out a release so this will suffice for now. Also Yan suggested setting reada to -1 in the delete case to enable backwards readahead, and in the listxattr case I moved path->reada = 2; to after the if (!path) check so we can avoid a possible null dereference. Thank you, Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Off by one fixes for extent-tree.cYan1-7/+3
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Add full_scan parameter to find_search_startYan1-8/+6
This patch adds a new parameter 'full_scan' to 'find_search_start', thereby 'find_search_start' can know whether 'find_free_extent' is in full scan phrase. I feel that 'find_search_start' should skip calling 'btrfs_find_block_group' when 'find_free_extent' is in full scan phrase. In my test on a 2GB volume, Oops occurs when space usage is about 76%. After apply the patch, Oops occurs when space usage is near 100%. Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Add block group pinned accounting backYan3-16/+44
This patch adds a helper function 'update_pinned_extents' to extent-tree.c. The usage of the helper function is similar to 'update_block_group', the last parameter of the function indicates pin vs unpin. Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25xattr support for btrfsJosef Bacik9-14/+751
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Fix extent bit range testingChris Mason1-7/+17
It could return the bit as set when there was actually a hole at the very end of the range. Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Add readpages supportChris Mason3-8/+78
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Avoid extent_buffer lru corruptionChris Mason1-1/+7
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Allow large data extents in a single file to span into metadata block groupsChris Mason2-6/+36
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Fix failure cleanups when allocating extent buffers failChris Mason1-26/+30
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Use writepages for the metadata tooChris Mason1-3/+26
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Properly delete csum item in btrfs_truncate_in_trans.Yan1-1/+2
When 'item_end' is equal to 'inode->i_size', 'found_type' is updated and current item is skipped. This behavior is correct for extent item, but incorrect for csum item. For example, there is a csum item with 'offset == 0'. When deleting the inode, 'inode->i_size' is set to 0, so the csum item isn't deleted. Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Change push_leaf_{leaf,right} to empty the src leave during item deletionChris Mason1-23/+49
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Fix recursive KM_USER1 usage in btrfs_realloc_nodeChris Mason2-8/+19
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Optimize allocations as we need to mix data and metadata into one groupChris Mason3-7/+43
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Fix EXTENT_MAP_INLINE off by one in btrfs_drop_extentsYan1-2/+1
Don't set hint_byte to EXTENT_MAP_INLINE when 'end == extent_end' or 'start == key.offset' . The inline extent will be truncated in these cases. Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Fix u32 overflow in dirty_and_release_pages.Yan1-4/+5
When calculating the size of inline extent, inode->i_size should also be take into consideration, otherwise sys_write may drop some data silently. You can test this bug by: #dd if=/dev/zero bs=4k count=1 of=test_file #dd if=/dev/zero bs=2k count=1 of=test_file conv=notrunc Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Make defrag check nodes against the progress key to prevent repeating workChris Mason2-25/+34
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Properly update free space cache in __free_extentYan1-2/+4
When pin_down_bytes decides not to pin a block because it was from the current transaction, make sure the in memory cache of free extents is updated Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Add writepages supportChris Mason3-25/+124
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: small fixes for find_lock_delalloc_range.Yan1-1/+3
There is a 'finish_wait', but no 'prepare_to_wait' . So I think that the 'prepare_to_wait' is missing. The second change is according to the name of variable. Signed-off-by: Chris Mason <chris.mason@oracle.com>
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