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- 25 Sep, 2008 40 commits
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Chris Mason authored
Signed-off-by: Chris Mason <chris.mason@oracle.com>
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Chris Mason authored
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>
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Chris Mason authored
Signed-off-by: Chris Mason <chris.mason@oracle.com>
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Chris Mason authored
Signed-off-by: Chris Mason <chris.mason@oracle.com>
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Chris Mason authored
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>
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Chris Mason authored
2.6.18 seems to get caught in an infinite loop when cancel_rearming_delayed_workqueue is called more than once, so this switches to cancel_delayed_work, which is arguably more correct. Also, balance_dirty_pages can run into problems with 2.6.18 based kernels because it doesn't have the per-bdi dirty limits. This avoids calling balance_dirty_pages on the btree inode unless there is actually something to balance, which is a good optimization in general. Finally there's a compile fix for ordered-data.h Signed-off-by: Chris Mason <chris.mason@oracle.com>
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Chris Mason authored
Signed-off-by: Chris Mason <chris.mason@oracle.com>
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Chris Mason authored
Signed-off-by: Chris Mason <chris.mason@oracle.com>
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Chris Mason authored
Signed-off-by: Chris Mason <chris.mason@oracle.com>
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Chris Mason authored
Signed-off-by: Chris Mason <chris.mason@oracle.com>
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Chris Mason authored
Signed-off-by: Chris Mason <chris.mason@oracle.com>
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Chris Mason authored
Signed-off-by: Chris Mason <chris.mason@oracle.com>
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Chris Mason authored
Signed-off-by: Chris Mason <chris.mason@oracle.com>
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Chris Mason authored
Signed-off-by: Chris Mason <chris.mason@oracle.com>
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Chris Mason authored
Signed-off-by: Chris Mason <chris.mason@oracle.com>
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Chris Mason authored
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>
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Chris Mason authored
Signed-off-by: Chris Mason <chris.mason@oracle.com>
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Chris Mason authored
The btree inode should only have a single extent_map in the cache, it doesn't make sense to ever drop it. Signed-off-by: Chris Mason <chris.mason@oracle.com>
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Chris Mason authored
Signed-off-by: Chris Mason <chris.mason@oracle.com>
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Chris Mason authored
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>
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Chris Mason authored
Block headers now store the chunk tree uuid Chunk items records the device uuid for each stripes Device extent items record better back refs to the chunk tree Block groups record better back refs to the chunk tree The chunk tree format has also changed. The objectid of BTRFS_CHUNK_ITEM_KEY used to be the logical offset of the chunk. Now it is a chunk tree id, with the logical offset being stored in the offset field of the key. This allows a single chunk tree to record multiple logical address spaces, upping the number of bytes indexed by a chunk tree from 2^64 to 2^128. Signed-off-by: Chris Mason <chris.mason@oracle.com>
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Chris Mason authored
This includes fixing a missing spinlock init call that caused oops on mount for most kernels other than 2.6.25. Signed-off-by: Chris Mason <chris.mason@oracle.com>
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Miguel authored
bio_endio() changed prototype on linux 2.6.24, support older kernels using the older prototype. Signed-off-by: Chris Mason <chris.mason@oracle.com>
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Miguel authored
Fix for a endianess BUG when using btrfs v0.13 with kernels older than 2.6.23 Problem: Has of v0.13, btrfs-progs is using crc32c.c equivalent to the one found on linux-2.6.23/lib/libcrc32c.c Since crc32c_le() changed in linux-2.6.23, when running btrfs v0.13 with older kernels we have a missmatch between the versions of crc32c_le() from btrfs-progs and libcrc32c in the kernel. This missmatch causes a bug when using btrfs on big endian machines. Solution: btrfs_crc32c() macro that when compiling for kernels older than 2.6.23, does endianess conversion to parameters and return value of crc32c(). This endianess conversion nullifies the differences in implementation of crc32c_le(). If kernel 2.6.23 or better, it calls crc32c(). Signed-off-by: Miguel Sousa Filipe <miguel.filipe@gmail.com> --- Signed-off-by: Chris Mason <chris.mason@oracle.com>
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Chris Mason authored
Signed-off-by: Chris Mason <chris.mason@oracle.com>
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Chris Mason authored
Signed-off-by: Chris Mason <chris.mason@oracle.com>
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Chris Mason authored
Signed-off-by: Chris Mason <chris.mason@oracle.com>
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Chris Mason authored
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>
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Chris Mason authored
Before, metadata checksumming was done by the callers of read_tree_block, which would set EXTENT_CSUM bits in the extent tree to show that a given range of pages was already checksummed and didn't need to be verified again. But, those bits could go away via try_to_releasepage, and the end result was bogus checksum failures on pages that never left the cache. The new code validates checksums when the page is read. It is a little tricky because metadata blocks can span pages and a single read may end up going via multiple bios. Signed-off-by: Chris Mason <chris.mason@oracle.com>
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Chris Mason authored
Signed-off-by: Chris Mason <chris.mason@oracle.com>
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Chris Mason authored
Signed-off-by: Chris Mason <chris.mason@oracle.com>
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Chris Mason authored
Signed-off-by: Chris Mason <chris.mason@oracle.com>
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Chris Mason authored
Signed-off-by: Chris Mason <chris.mason@oracle.com>
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Chris Mason authored
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>
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Yan authored
Signed-off-by: Chris Mason <chris.mason@oracle.com>
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Chris Mason authored
This allows detection of blocks that have already been written in the running transaction so they can be recowed instead of modified again. It is step one in trusting the transid field of the block pointers. Signed-off-by: Chris Mason <chris.mason@oracle.com>
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Chris Mason authored
This also fixes one leak around the super block when failing to mount the FS. Signed-off-by: Chris Mason <chris.mason@oracle.com>
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Chris Mason authored
Signed-off-by: Chris Mason <chris.mason@oracle.com>
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Chris Mason authored
This allows intelligent versions of unplug and congestion functions Signed-off-by: Chris Mason <chris.mason@oracle.com>
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Chris Mason authored
Signed-off-by: Chris Mason <chris.mason@oracle.com>
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