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path: root/fs/btrfs/inode.c
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* Fix corners in writepage and btrfs_truncate_pageChris Mason2008-09-25
| | | | | | | | | | | | The extent_io writepage calls needed an extra check for discarding pages that started on th last byte in the file. btrfs_truncate_page needed checks to make sure the page was still part of the file after reading it, and most importantly, needed to wait for all IO to the page to finish before freeing the corresponding extents on disk. Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Handle write errors on raid1 and raid10Chris Mason2008-09-25
| | | | | | | | | | | | 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>
* Btrfs: A number of nodatacow fixesChris Mason2008-09-25
| | | | | | | | | | | Once part of a delalloc request fails the cow checks, just cow the entire range It is possible for the back references to all be from the same root, but still have snapshots against an extent. The checks are now more strict, forcing cow any time there are multiple refs against the data extent. Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Update nodatacow mode to support cloned single files and resizingChris Mason2008-09-25
| | | | | | | | | | | Before, nodatacow only checked to make sure multiple roots didn't have references on a single extent. This check makes sure that multiple inodes don't have references. nodatacow needed an extra check to see if the block group was currently readonly. This way cows forced by the chunk relocation code are honored. Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Add support for online device removalChris Mason2008-09-25
| | | | | | | | | | | | | This required a few structural changes to the code that manages bdev pointers: The VFS super block now gets an anon-bdev instead of a pointer to the lowest bdev. This allows us to avoid swapping the super block bdev pointer around at run time. The code to read in the super block no longer goes through the extent buffer interface. Things got ugly keeping the mapping constant. Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Fix clone ioctl to not hold the path over insertsChris Mason2008-09-25
| | | | Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Silence bogus inode.c compiler warningsChris Mason2008-09-25
| | | | Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Clone file data ioctlSage Weil2008-09-25
| | | | | | Add a new ioctl to clone file data Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Add balance ioctl to restripe the chunksChris Mason2008-09-25
| | | | Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Add new ioctl to add devicesChris Mason2008-09-25
| | | | Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Do more optimal file RA during shrinking and defragChris Mason2008-09-25
| | | | Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Make the resizer work based on shrinking and growing devicesChris Mason2008-09-25
| | | | Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Throttle file_write when data=ordered is flushing the inodeChris Mason2008-09-25
| | | | Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Fix the unplug_io_fn to grab a consistent copy of page->mappingChris Mason2008-09-25
| | | | Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Fix btrfs_get_extent and get_block corner cases, and disable O_DIRECT readsChris Mason2008-09-25
| | | | | | | The generic O_DIRECT code assumes all the bios have the same bdev, which isn't true for multi-device btrfs. Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Make an unplug function that doesn't unplug every spindleChris Mason2008-09-25
| | | | Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Remove debugging statements from the invalidatepage callsChris Mason2008-09-25
| | | | Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Force page->private removal in btrfs_invalidatepageChris Mason2008-09-25
| | | | | | | | | | | | | btrfs_invalidatepage is not allowed to leave pages around on the lru. Any such pages will trigger an oops later on because the VM will see page->private and assume it is a buffer head. This also forces extra flushes of the async work queues before dropping all the pages on the btree inode during unmount. Left over items on the work queues are one possible cause of busy state ranges during truncate_inode_pages. Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Use the extent map cache to find the logical disk block during data ↵Chris Mason2008-09-25
| | | | | | | | | | | | | | | | | | | retries The data read retry code needs to find the logical disk block before it can resubmit new bios. But, finding this block isn't allowed to take the fs_mutex because that will deadlock with a number of different callers. This changes the retry code to use the extent map cache instead, but that requires the extent map cache to have the extent we're looking for. This is a problem because btrfs_drop_extent_cache just drops the entire extent instead of the little tiny part it is invalidating. The bulk of the code in this patch changes btrfs_drop_extent_cache to invalidate only a portion of the extent cache, and changes btrfs_get_extent to deal with the results. Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Don't wait on tree block writeback before freeing them anymoreChris Mason2008-09-25
| | | | | | | This isn't required anymore because we don't reallocate blocks that have already been written in this transaction. Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Write bio checksumming outside the FS mutexChris Mason2008-09-25
| | | | | | | This significantly improves streaming write performance by allowing concurrency in the data checksumming. Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Create a work queue for bio writesChris Mason2008-09-25
| | | | | | | 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>
* Add a min size parameter to btrfs_alloc_extentChris Mason2008-09-25
| | | | | | | | | On huge machines, delayed allocation may try to allocate massive extents. This change allows btrfs_alloc_extent to return something smaller than the caller asked for, and the data allocation routines will loop over the allocations until it fills the whole delayed alloc. Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Fixup a few u64<->pointer casts for 32 bitChris Mason2008-09-25
| | | | Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Add O_DIRECT read and write (writes == buffered + cache flush)Chris Mason2008-09-25
| | | | | | | | | | | | This adds basic O_DIRECT read and write support. In the write case, we just do a normal buffered write followed by a cache flush. O_DIRECT + O_SYNC are required to trigger metadata syncs. In the read case, there is a basic btrfs_get_block call for use by the generic O_DIRECT code. This does honor multi-volume mapping rules but it skips all checksumming. Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Handle checksumming errors while reading data blocksChris Mason2008-09-25
| | | | Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Retry metadata reads in the face of checksum failuresChris Mason2008-09-25
| | | | Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Handle data block end_io through the async work queueChris Mason2008-09-25
| | | | | | | 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>
* Change btrfs_map_block to return a structure with mappings for all stripesChris Mason2008-09-25
| | | | Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Add support for mirroring across drivesChris Mason2008-09-25
| | | | Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Create a btrfs backing dev infoChris Mason2008-09-25
| | | | | | This allows intelligent versions of unplug and congestion functions Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Implement raid0 when multiple devices are presentChris Mason2008-09-25
| | | | Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Bring back mount -o ssd optimizationsChris Mason2008-09-25
| | | | Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Dynamic chunk and block group allocationChris Mason2008-09-25
| | | | Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Add support for multiple devices per filesystemChris Mason2008-09-25
| | | | Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Misc 2.6.25 updatesChris Mason2008-09-25
| | | | | | Remove the btrfs read_inode method, and use save_mount_options Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: checksum file data at bio submission time instead of during writepageChris Mason2008-09-25
| | | | | | | | | | | | | | | | When we checkum file data during writepage, the checksumming is done one page at a time, making it difficult to do bulk metadata modifications to insert checksums for large ranges of the file at once. This patch changes btrfs to checksum on a per-bio basis instead. The bios are checksummed before they are handed off to the block layer, so each bio is contiguous and only has pages from the same inode. Checksumming on a bio basis allows us to insert and modify the file checksum items in large groups. It also allows the checksumming to be done more easily by async worker threads. Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Fix looping on readdir of the subvol rootsYan Zheng2008-09-25
| | | | Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Fix i_blocks accountingChris Mason2008-09-25
| | | | | | | | | | Now that delayed allocation accounting works, i_blocks accounting is changed to only modify i_blocks when extents inserted or removed. The fillattr call is changed to include the delayed allocation byte count in the i_blocks result. Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Fix typo in extent_io.cYan2008-09-25
| | | | | | --- Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Enable delalloc accountingChris Mason2008-09-25
| | | | Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Fix hole start calculation in btrfs_settarChris Mason2008-09-25
| | | | Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Properly align the hole size in btrfs_setattrChris Mason2008-09-25
| | | | Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Align extent length to sectorsize inYan2008-09-25
| | | | | | --- Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Do delalloc accounting via hooks in the extent_state codeChris Mason2008-09-25
| | | | Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Add inode item and backref in one insert, reducing cpu usageChris Mason2008-09-25
| | | | Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: During deletes and truncate, remove many items at once from the treeChris Mason2008-09-25
| | | | Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: extent_io and extent_state optimizationsChris Mason2008-09-25
| | | | | | | | | | | | The end_bio routines are changed to take a pointer to the extent state struct, and the state tree is walked in order to set/clear appropriate bits as IO completes. This greatly reduces the number of rbtree searches done by the end_bio handlers, and reduces lock contention. The extent_io releasepage function is changed to avoid expensive searches for locked state. Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Add some extra debugging around file data checksum failuresChris Mason2008-09-25
| | | | Signed-off-by: Chris Mason <chris.mason@oracle.com>
* Btrfs: Force f_pos to the max when a readdir hits the end of the directory.Chris Mason2008-09-25
| | | | Signed-off-by: Chris Mason <chris.mason@oracle.com>
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