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path: root/fs/btrfs/disk-io.h
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2008-09-25Btrfs: Wait for async bio submissions to make some progress at queue timeChris Mason
Before, the btrfs bdi congestion function was used to test for too many async bios. This keeps that check to throttle pdflush, but also adds a check while queuing bios. Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Transaction commit: don't use filemap_fdatawaitChris Mason
After writing out all the remaining btree blocks in the transaction, the commit code would use filemap_fdatawait to make sure it was all on disk. This means it would wait for blocks written by other procs as well. The new code walks the list of blocks for this transaction again and waits only for those required by this transaction. Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Online btree defragmentation fixesChris Mason
The btree defragger wasn't making forward progress because the new key wasn't being saved by the btrfs_search_forward function. This also disables the automatic btree defrag, it wasn't scaling well to huge filesystems. The auto-defrag needs to be done differently. Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Add btrfs_end_transaction_throttle to force writers to wait for pending commitsChris Mason
The existing throttle mechanism was often not sufficient to prevent new writers from coming in and making a given transaction run forever. This adds an explicit wait at the end of most operations so they will allow the current transaction to close. There is no wait inside file_write, inode updates, or cow filling, all which have different deadlock possibilities. This is a temporary measure until better asynchronous commit support is added. This code leads to stalls as it waits for data=ordered writeback, and it really needs to be fixed. Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Add mount -o degraded to allow mounts to continue with missing devicesChris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Handle write errors on raid1 and raid10Chris Mason
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>
2008-09-25Btrfs: Pass down the expected generation number when reading tree blocksChris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Create a work queue for bio writesChris Mason
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>
2008-09-25Btrfs: Write out all super blocks on commit, and bring back proper barrier ↵Chris Mason
support Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Handle data block end_io through the async work queueChris Mason
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>
2008-09-25Btrfs: Verify checksums on tree blocks found without read_tree_blockChris Mason
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>
2008-09-25Btrfs: Add support for device scanning and detection ioctlsChris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Add support for multiple devices per filesystemChris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Add some simple throttling to wait for data=ordered and snapshot deletionChris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Add data=ordered supportChris Mason
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>
2008-09-25Btrfs: Support for online FS resize (grow and shrink)Chris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Add back file data checksummingChris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Add back the online defragging codeChris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Allow tree blocks larger than the page sizeChris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Create extent_buffer interface for large blocksizesChris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Use balance_dirty_pages_nr on btree blocksChris Mason
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>
2007-09-10Add support for defragging files via btrfsctl -d. Avoid OOM on extent treeChris Mason
defrag. Signed-off-by: Chris Mason <chris.mason@oracle.com>
2007-08-29Btrfs: Add per-root block accounting and sysfs entriesJosef Bacik
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2007-08-27Btrfs: Extent based page cache code. This uses an rbtree of extents and testsChris Mason
instead of buffer heads. Signed-off-by: Chris Mason <chris.mason@oracle.com>
2007-08-10Btrfs: Add BH_Defrag to mark buffers that are in need of defraggingChris Mason
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>
2007-06-28Btrfs: crash recovery fixesChris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2007-06-22Btrfs: Add the ability to find and remove dead roots after a crash.Chris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2007-06-12Btrfs: add GPLv2Chris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2007-05-02Btrfs: fix page cache memory leakChris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2007-05-01Btrfs: directory readaheadChris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2007-04-12Btrfs: add a device id to device itemsChris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2007-04-12Btrfs: add disk ioctl, mostly workingChris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2007-04-11Btrfs: create a logical->phsyical block number mapping schemeChris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2007-04-09Btrfs: groundwork for subvolume and snapshot rootsChris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2007-04-02Btrfs: still corruption huntingChris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2007-03-29Btrfs: verify csums on readChris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2007-03-28Btrfs: use a btree inode instead of sb_getblkChris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2007-03-22Btrfs: transaction reworkChris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2007-03-22Mountable btrfs, with readdirChris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2007-03-21Btrfs: initial move to kernel module landChris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2007-03-16Btrfs: transaction handles everywhereChris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2007-03-14Btrfs: variable block size supportChris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2007-03-13Btrfs: Change the super to point to a tree of trees to enable persistent ↵Chris Mason
snapshots Signed-off-by: Chris Mason <chris.mason@oracle.com>
2007-03-13rename funcs and structs to btrfsChris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2007-03-06Btrfs: Fixup reference counting on cowsChris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2007-03-01Btrfs: pretend page cache & commit codeChris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2007-02-23Btrfs: Block sized tree extents and extent deletionChris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2007-02-21Btrfs: extent fixesChris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2007-02-20Btrfs: early extent mapping supportChris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2007-02-02Btrfs: Add backing store, memory managementChris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
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